Merge github.com:grpc/grpc into flow_control_v2

438 files changed, 15802 insertions, 13767 deletions

diff --git a/src/benchmark/gen_build_yaml.py b/src/benchmark/gen_build_yaml.py
new file mode 100755
index 0000000000..09b76115a8
--- /dev/null
+++ b/src/benchmark/gen_build_yaml.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python2.7
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import os
+import sys
+import glob
+import yaml
+
+os.chdir(os.path.dirname(sys.argv[0])+'/../..')
+
+out = {}
+
+out['libs'] = [{
+    'name': 'benchmark',
+    'build': 'private',
+    'language': 'c++',
+    'secure': 'no',
+    'defaults': 'benchmark',
+    'src': sorted(glob.glob('third_party/benchmark/src/*.cc')),
+    'headers': sorted(
+        glob.glob('third_party/benchmark/src/*.h') +
+        glob.glob('third_party/benchmark/include/benchmark/*.h')),
+}]
+
+print yaml.dump(out)
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index fa72f9b0d9..a26eeb46b9 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -322,7 +322,7 @@ void PrintHeaderClientMethod(Printer *printer, const Method *method,
       printer->Print(
           *vars,
           "::grpc::Status $Method$(::grpc::ClientContext* context, "
-          "const $Request$& request, $Response$* response) GRPC_OVERRIDE;\n");
+          "const $Request$& request, $Response$* response) override;\n");
       printer->Print(
           *vars,
           "std::unique_ptr< ::grpc::ClientAsyncResponseReader< $Response$>> "
@@ -417,37 +417,34 @@ void PrintHeaderClientMethod(Printer *printer, const Method *method,
                      "::grpc::ClientAsyncResponseReader< $Response$>* "
                      "Async$Method$Raw(::grpc::ClientContext* context, "
                      "const $Request$& request, "
-                     "::grpc::CompletionQueue* cq) GRPC_OVERRIDE;\n");
+                     "::grpc::CompletionQueue* cq) override;\n");
     } else if (method->ClientOnlyStreaming()) {
       printer->Print(*vars,
                      "::grpc::ClientWriter< $Request$>* $Method$Raw("
                      "::grpc::ClientContext* context, $Response$* response) "
-                     "GRPC_OVERRIDE;\n");
-      printer->Print(
-          *vars,
-          "::grpc::ClientAsyncWriter< $Request$>* Async$Method$Raw("
-          "::grpc::ClientContext* context, $Response$* response, "
-          "::grpc::CompletionQueue* cq, void* tag) GRPC_OVERRIDE;\n");
+                     "override;\n");
+      printer->Print(*vars,
+                     "::grpc::ClientAsyncWriter< $Request$>* Async$Method$Raw("
+                     "::grpc::ClientContext* context, $Response$* response, "
+                     "::grpc::CompletionQueue* cq, void* tag) override;\n");
     } else if (method->ServerOnlyStreaming()) {
       printer->Print(*vars,
                      "::grpc::ClientReader< $Response$>* $Method$Raw("
                      "::grpc::ClientContext* context, const $Request$& request)"
-                     " GRPC_OVERRIDE;\n");
+                     " override;\n");
       printer->Print(
           *vars,
           "::grpc::ClientAsyncReader< $Response$>* Async$Method$Raw("
           "::grpc::ClientContext* context, const $Request$& request, "
-          "::grpc::CompletionQueue* cq, void* tag) GRPC_OVERRIDE;\n");
+          "::grpc::CompletionQueue* cq, void* tag) override;\n");
     } else if (method->BidiStreaming()) {
-      printer->Print(
-          *vars,
-          "::grpc::ClientReaderWriter< $Request$, $Response$>* "
-          "$Method$Raw(::grpc::ClientContext* context) GRPC_OVERRIDE;\n");
-      printer->Print(
-          *vars,
-          "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
-          "Async$Method$Raw(::grpc::ClientContext* context, "
-          "::grpc::CompletionQueue* cq, void* tag) GRPC_OVERRIDE;\n");
+      printer->Print(*vars,
+                     "::grpc::ClientReaderWriter< $Request$, $Response$>* "
+                     "$Method$Raw(::grpc::ClientContext* context) override;\n");
+      printer->Print(*vars,
+                     "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
+                     "Async$Method$Raw(::grpc::ClientContext* context, "
+                     "::grpc::CompletionQueue* cq, void* tag) override;\n");
     }
   }
 }
@@ -509,7 +506,7 @@ void PrintHeaderServerMethodAsync(Printer *printer, const Method *method,
                  "  ::grpc::Service::MarkMethodAsync($Idx$);\n"
                  "}\n");
   printer->Print(*vars,
-                 "~WithAsyncMethod_$Method$() GRPC_OVERRIDE {\n"
+                 "~WithAsyncMethod_$Method$() override {\n"
                  "  BaseClassMustBeDerivedFromService(this);\n"
                  "}\n");
   if (method->NoStreaming()) {
@@ -518,7 +515,7 @@ void PrintHeaderServerMethodAsync(Printer *printer, const Method *method,
         "// disable synchronous version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "$Response$* response) final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -540,7 +537,7 @@ void PrintHeaderServerMethodAsync(Printer *printer, const Method *method,
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerReader< $Request$>* reader, "
-        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "$Response$* response) final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -561,7 +558,7 @@ void PrintHeaderServerMethodAsync(Printer *printer, const Method *method,
         "// disable synchronous version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "::grpc::ServerWriter< $Response$>* writer) GRPC_FINAL GRPC_OVERRIDE "
+        "::grpc::ServerWriter< $Response$>* writer) final override "
         "{\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
@@ -585,7 +582,7 @@ void PrintHeaderServerMethodAsync(Printer *printer, const Method *method,
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
-        "GRPC_FINAL GRPC_OVERRIDE {\n"
+        "final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -632,7 +629,7 @@ void PrintHeaderServerMethodStreamedUnary(
                    "std::placeholders::_2)));\n"
                    "}\n");
     printer->Print(*vars,
-                   "~WithStreamedUnaryMethod_$Method$() GRPC_OVERRIDE {\n"
+                   "~WithStreamedUnaryMethod_$Method$() override {\n"
                    "  BaseClassMustBeDerivedFromService(this);\n"
                    "}\n");
     printer->Print(
@@ -640,7 +637,7 @@ void PrintHeaderServerMethodStreamedUnary(
         "// disable regular version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "$Response$* response) final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -683,7 +680,7 @@ void PrintHeaderServerMethodSplitStreaming(
                    "std::placeholders::_2)));\n"
                    "}\n");
     printer->Print(*vars,
-                   "~WithSplitStreamingMethod_$Method$() GRPC_OVERRIDE {\n"
+                   "~WithSplitStreamingMethod_$Method$() override {\n"
                    "  BaseClassMustBeDerivedFromService(this);\n"
                    "}\n");
     printer->Print(
@@ -691,7 +688,7 @@ void PrintHeaderServerMethodSplitStreaming(
         "// disable regular version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "::grpc::ServerWriter< $Response$>* writer) GRPC_FINAL GRPC_OVERRIDE "
+        "::grpc::ServerWriter< $Response$>* writer) final override "
         "{\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
@@ -727,7 +724,7 @@ void PrintHeaderServerMethodGeneric(
                  "  ::grpc::Service::MarkMethodGeneric($Idx$);\n"
                  "}\n");
   printer->Print(*vars,
-                 "~WithGenericMethod_$Method$() GRPC_OVERRIDE {\n"
+                 "~WithGenericMethod_$Method$() override {\n"
                  "  BaseClassMustBeDerivedFromService(this);\n"
                  "}\n");
   if (method->NoStreaming()) {
@@ -736,7 +733,7 @@ void PrintHeaderServerMethodGeneric(
         "// disable synchronous version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "$Response$* response) final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -747,7 +744,7 @@ void PrintHeaderServerMethodGeneric(
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerReader< $Request$>* reader, "
-        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "$Response$* response) final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -757,7 +754,7 @@ void PrintHeaderServerMethodGeneric(
         "// disable synchronous version of this method\n"
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, const $Request$* request, "
-        "::grpc::ServerWriter< $Response$>* writer) GRPC_FINAL GRPC_OVERRIDE "
+        "::grpc::ServerWriter< $Response$>* writer) final override "
         "{\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
@@ -769,7 +766,7 @@ void PrintHeaderServerMethodGeneric(
         "::grpc::Status $Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
-        "GRPC_FINAL GRPC_OVERRIDE {\n"
+        "final override {\n"
         "  abort();\n"
         "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
         "}\n");
@@ -784,7 +781,7 @@ void PrintHeaderService(Printer *printer, const Service *service,
 
   printer->Print(service->GetLeadingComments().c_str());
   printer->Print(*vars,
-                 "class $Service$ GRPC_FINAL {\n"
+                 "class $Service$ final {\n"
                  " public:\n");
   printer->Indent();
 
@@ -810,7 +807,7 @@ void PrintHeaderService(Printer *printer, const Service *service,
   printer->Outdent();
   printer->Print("};\n");
   printer->Print(
-      "class Stub GRPC_FINAL : public StubInterface"
+      "class Stub final : public StubInterface"
       " {\n public:\n");
   printer->Indent();
   printer->Print(
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index 48157033db..cc7a7a96ae 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -68,13 +68,13 @@ namespace {
 // Currently, we cannot easily reuse the functionality as
 // google/protobuf/compiler/csharp/csharp_doc_comment.h is not a public header.
 // TODO(jtattermusch): reuse the functionality from google/protobuf.
-void GenerateDocCommentBodyImpl(grpc::protobuf::io::Printer *printer,
+bool GenerateDocCommentBodyImpl(grpc::protobuf::io::Printer *printer,
                                 grpc::protobuf::SourceLocation location) {
   grpc::string comments = location.leading_comments.empty()
                               ? location.trailing_comments
                               : location.leading_comments;
   if (comments.empty()) {
-    return;
+    return false;
   }
   // XML escaping... no need for apostrophes etc as the whole text is going to
   // be a child
@@ -107,18 +107,84 @@ void GenerateDocCommentBodyImpl(grpc::protobuf::io::Printer *printer,
         printer->Print("///\n");
       }
       last_was_empty = false;
-      printer->Print("/// $line$\n", "line", *it);
+      printer->Print("///$line$\n", "line", *it);
     }
   }
   printer->Print("/// </summary>\n");
+  return true;
 }
 
 template <typename DescriptorType>
-void GenerateDocCommentBody(grpc::protobuf::io::Printer *printer,
+bool GenerateDocCommentBody(grpc::protobuf::io::Printer *printer,
                             const DescriptorType *descriptor) {
   grpc::protobuf::SourceLocation location;
-  if (descriptor->GetSourceLocation(&location)) {
-    GenerateDocCommentBodyImpl(printer, location);
+  if (!descriptor->GetSourceLocation(&location)) {
+    return false;
+  }
+  return GenerateDocCommentBodyImpl(printer, location);
+}
+
+void GenerateDocCommentServerMethod(grpc::protobuf::io::Printer *printer,
+                                    const MethodDescriptor *method) {
+  if (GenerateDocCommentBody(printer, method)) {
+    if (method->client_streaming()) {
+      printer->Print(
+          "/// <param name=\"requestStream\">Used for reading requests from "
+          "the client.</param>\n");
+    } else {
+      printer->Print(
+          "/// <param name=\"request\">The request received from the "
+          "client.</param>\n");
+    }
+    if (method->server_streaming()) {
+      printer->Print(
+          "/// <param name=\"responseStream\">Used for sending responses back "
+          "to the client.</param>\n");
+    }
+    printer->Print(
+        "/// <param name=\"context\">The context of the server-side call "
+        "handler being invoked.</param>\n");
+    if (method->server_streaming()) {
+      printer->Print(
+          "/// <returns>A task indicating completion of the "
+          "handler.</returns>\n");
+    } else {
+      printer->Print(
+          "/// <returns>The response to send back to the client (wrapped by a "
+          "task).</returns>\n");
+    }
+  }
+}
+
+void GenerateDocCommentClientMethod(grpc::protobuf::io::Printer *printer,
+                                    const MethodDescriptor *method,
+                                    bool is_sync, bool use_call_options) {
+  if (GenerateDocCommentBody(printer, method)) {
+    if (!method->client_streaming()) {
+      printer->Print(
+          "/// <param name=\"request\">The request to send to the "
+          "server.</param>\n");
+    }
+    if (!use_call_options) {
+      printer->Print(
+          "/// <param name=\"headers\">The initial metadata to send with the "
+          "call. This parameter is optional.</param>\n");
+      printer->Print(
+          "/// <param name=\"deadline\">An optional deadline for the call. The "
+          "call will be cancelled if deadline is hit.</param>\n");
+      printer->Print(
+          "/// <param name=\"cancellationToken\">An optional token for "
+          "canceling the call.</param>\n");
+    } else {
+      printer->Print(
+          "/// <param name=\"options\">The options for the call.</param>\n");
+    }
+    if (is_sync) {
+      printer->Print(
+          "/// <returns>The response received from the server.</returns>\n");
+    } else {
+      printer->Print("/// <returns>The call object.</returns>\n");
+    }
   }
 }
 
@@ -313,13 +379,13 @@ void GenerateServerClass(Printer *out, const ServiceDescriptor *service) {
       "/// <summary>Base class for server-side implementations of "
       "$servicename$</summary>\n",
       "servicename", GetServiceClassName(service));
-  out->Print("public abstract class $name$\n", "name",
+  out->Print("public abstract partial class $name$\n", "name",
              GetServerClassName(service));
   out->Print("{\n");
   out->Indent();
   for (int i = 0; i < service->method_count(); i++) {
     const MethodDescriptor *method = service->method(i);
-    GenerateDocCommentBody(out, method);
+    GenerateDocCommentServerMethod(out, method);
     out->Print(
         "public virtual $returntype$ "
         "$methodname$($request$$response_stream_maybe$, "
@@ -344,7 +410,7 @@ void GenerateServerClass(Printer *out, const ServiceDescriptor *service) {
 void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
   out->Print("/// <summary>Client for $servicename$</summary>\n", "servicename",
              GetServiceClassName(service));
-  out->Print("public class $name$ : ClientBase<$name$>\n", "name",
+  out->Print("public partial class $name$ : ClientBase<$name$>\n", "name",
              GetClientClassName(service));
   out->Print("{\n");
   out->Indent();
@@ -393,7 +459,7 @@ void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
 
     if (method_type == METHODTYPE_NO_STREAMING) {
       // unary calls have an extra synchronous stub method
-      GenerateDocCommentBody(out, method);
+      GenerateDocCommentClientMethod(out, method, true, false);
       out->Print(
           "public virtual $response$ $methodname$($request$ request, Metadata "
           "headers = null, DateTime? deadline = null, CancellationToken "
@@ -411,7 +477,7 @@ void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
       out->Print("}\n");
 
       // overload taking CallOptions as a param
-      GenerateDocCommentBody(out, method);
+      GenerateDocCommentClientMethod(out, method, true, true);
       out->Print(
           "public virtual $response$ $methodname$($request$ request, "
           "CallOptions options)\n",
@@ -432,7 +498,7 @@ void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
     if (method_type == METHODTYPE_NO_STREAMING) {
       method_name += "Async";  // prevent name clash with synchronous method.
     }
-    GenerateDocCommentBody(out, method);
+    GenerateDocCommentClientMethod(out, method, false, false);
     out->Print(
         "public virtual $returntype$ $methodname$($request_maybe$Metadata "
         "headers = null, DateTime? deadline = null, CancellationToken "
@@ -452,7 +518,7 @@ void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
     out->Print("}\n");
 
     // overload taking CallOptions as a param
-    GenerateDocCommentBody(out, method);
+    GenerateDocCommentClientMethod(out, method, false, true);
     out->Print(
         "public virtual $returntype$ $methodname$($request_maybe$CallOptions "
         "options)\n",
@@ -518,6 +584,9 @@ void GenerateBindServiceMethod(Printer *out, const ServiceDescriptor *service) {
       "/// <summary>Creates service definition that can be registered with a "
       "server</summary>\n");
   out->Print(
+      "/// <param name=\"serviceImpl\">An object implementing the server-side"
+      " handling logic.</param>\n");
+  out->Print(
       "public static ServerServiceDefinition BindService($implclass$ "
       "serviceImpl)\n",
       "implclass", GetServerClassName(service));
@@ -549,8 +618,8 @@ void GenerateService(Printer *out, const ServiceDescriptor *service,
                      bool generate_client, bool generate_server,
                      bool internal_access) {
   GenerateDocCommentBody(out, service);
-  out->Print("$access_level$ static class $classname$\n", "access_level",
-             GetAccessLevel(internal_access), "classname",
+  out->Print("$access_level$ static partial class $classname$\n",
+             "access_level", GetAccessLevel(internal_access), "classname",
              GetServiceClassName(service));
   out->Print("{\n");
   out->Indent();
diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index 6830f49931..0fac1b88cd 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -35,9 +35,12 @@
 #include <cassert>
 #include <cctype>
 #include <cstring>
+#include <fstream>
+#include <iostream>
 #include <map>
 #include <memory>
 #include <ostream>
+#include <set>
 #include <sstream>
 #include <tuple>
 #include <vector>
@@ -62,70 +65,19 @@ using std::make_pair;
 using std::map;
 using std::pair;
 using std::replace;
+using std::tuple;
 using std::vector;
+using std::set;
 
 namespace grpc_python_generator {
 
-GeneratorConfiguration::GeneratorConfiguration()
-    : grpc_package_root("grpc"), beta_package_root("grpc.beta") {}
-
-PythonGrpcGenerator::PythonGrpcGenerator(const GeneratorConfiguration& config)
-    : config_(config) {}
-
-PythonGrpcGenerator::~PythonGrpcGenerator() {}
-
-bool PythonGrpcGenerator::Generate(const FileDescriptor* file,
-                                   const grpc::string& parameter,
-                                   GeneratorContext* context,
-                                   grpc::string* error) const {
-  // Get output file name.
-  grpc::string file_name;
-  static const int proto_suffix_length = strlen(".proto");
-  if (file->name().size() > static_cast<size_t>(proto_suffix_length) &&
-      file->name().find_last_of(".proto") == file->name().size() - 1) {
-    file_name =
-        file->name().substr(0, file->name().size() - proto_suffix_length) +
-        "_pb2.py";
-  } else {
-    *error = "Invalid proto file name. Proto file must end with .proto";
-    return false;
-  }
-
-  std::unique_ptr<ZeroCopyOutputStream> output(
-      context->OpenForInsert(file_name, "module_scope"));
-  CodedOutputStream coded_out(output.get());
-  bool success = false;
-  grpc::string code = "";
-  tie(success, code) = grpc_python_generator::GetServices(file, config_);
-  if (success) {
-    coded_out.WriteRaw(code.data(), code.size());
-    return true;
-  } else {
-    return false;
-  }
-}
-
 namespace {
-//////////////////////////////////
-// BEGIN FORMATTING BOILERPLATE //
-//////////////////////////////////
-
-// Converts an initializer list of the form { key0, value0, key1, value1, ... }
-// into a map of key* to value*. Is merely a readability helper for later code.
-map<grpc::string, grpc::string> ListToDict(
-    const initializer_list<grpc::string>& values) {
-  assert(values.size() % 2 == 0);
-  map<grpc::string, grpc::string> value_map;
-  auto value_iter = values.begin();
-  for (unsigned i = 0; i < values.size() / 2; ++i) {
-    grpc::string key = *value_iter;
-    ++value_iter;
-    grpc::string value = *value_iter;
-    value_map[key] = value;
-    ++value_iter;
-  }
-  return value_map;
-}
+
+typedef vector<const Descriptor*> DescriptorVector;
+typedef map<grpc::string, grpc::string> StringMap;
+typedef vector<grpc::string> StringVector;
+typedef tuple<grpc::string, grpc::string> StringPair;
+typedef set<StringPair> StringPairSet;
 
 // Provides RAII indentation handling. Use as:
 // {
@@ -146,10 +98,6 @@ class IndentScope {
   Printer* printer_;
 };
 
-////////////////////////////////
-// END FORMATTING BOILERPLATE //
-////////////////////////////////
-
 // TODO(https://github.com/google/protobuf/issues/888):
 // Export `ModuleName` from protobuf's
 // `src/google/protobuf/compiler/python/python_generator.cc` file.
@@ -173,11 +121,61 @@ grpc::string ModuleAlias(const grpc::string& filename) {
   return module_name;
 }
 
-bool GetModuleAndMessagePath(const Descriptor* type,
-                             const ServiceDescriptor* service,
-                             grpc::string* out) {
+// Tucks all generator state in an anonymous namespace away from
+// PythonGrpcGenerator and the header file, mostly to encourage future changes
+// to not require updates to the grpcio-tools C++ code part. Assumes that it is
+// only ever used from a single thread.
+struct PrivateGenerator {
+  const GeneratorConfiguration& config;
+  const FileDescriptor* file;
+
+  bool generate_in_pb2_grpc;
+
+  Printer* out;
+
+  PrivateGenerator(const GeneratorConfiguration& config,
+                   const FileDescriptor* file);
+
+  std::pair<bool, grpc::string> GetGrpcServices();
+
+ private:
+  bool PrintPreamble();
+  bool PrintBetaPreamble();
+  bool PrintGAServices();
+  bool PrintBetaServices();
+
+  bool PrintAddServicerToServer(
+      const grpc::string& package_qualified_service_name,
+      const ServiceDescriptor* service);
+  bool PrintServicer(const ServiceDescriptor* service);
+  bool PrintStub(const grpc::string& package_qualified_service_name,
+                 const ServiceDescriptor* service);
+
+  bool PrintBetaServicer(const ServiceDescriptor* service);
+  bool PrintBetaServerFactory(
+      const grpc::string& package_qualified_service_name,
+      const ServiceDescriptor* service);
+  bool PrintBetaStub(const ServiceDescriptor* service);
+  bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
+                            const ServiceDescriptor* service);
+
+  // Get all comments (leading, leading_detached, trailing) and print them as a
+  // docstring. Any leading space of a line will be removed, but the line
+  // wrapping will not be changed.
+  template <typename DescriptorType>
+  void PrintAllComments(const DescriptorType* descriptor);
+
+  bool GetModuleAndMessagePath(const Descriptor* type, grpc::string* out);
+};
+
+PrivateGenerator::PrivateGenerator(const GeneratorConfiguration& config,
+                                   const FileDescriptor* file)
+    : config(config), file(file) {}
+
+bool PrivateGenerator::GetModuleAndMessagePath(const Descriptor* type,
+                                               grpc::string* out) {
   const Descriptor* path_elem_type = type;
-  vector<const Descriptor*> message_path;
+  DescriptorVector message_path;
   do {
     message_path.push_back(path_elem_type);
     path_elem_type = path_elem_type->containing_type();
@@ -188,12 +186,16 @@ bool GetModuleAndMessagePath(const Descriptor* type,
         file_name.find_last_of(".proto") == file_name.size() - 1)) {
     return false;
   }
-  grpc::string service_file_name = service->file()->name();
-  grpc::string module =
-      service_file_name == file_name ? "" : ModuleAlias(file_name) + ".";
+  grpc::string generator_file_name = file->name();
+  grpc::string module;
+  if (generator_file_name != file_name || generate_in_pb2_grpc) {
+    module = ModuleAlias(file_name) + ".";
+  } else {
+    module = "";
+  }
   grpc::string message_type;
-  for (auto path_iter = message_path.rbegin(); path_iter != message_path.rend();
-       ++path_iter) {
+  for (DescriptorVector::reverse_iterator path_iter = message_path.rbegin();
+       path_iter != message_path.rend(); ++path_iter) {
     message_type += (*path_iter)->name() + ".";
   }
   // no pop_back prior to C++11
@@ -202,33 +204,31 @@ bool GetModuleAndMessagePath(const Descriptor* type,
   return true;
 }
 
-// Get all comments (leading, leading_detached, trailing) and print them as a
-// docstring. Any leading space of a line will be removed, but the line wrapping
-// will not be changed.
 template <typename DescriptorType>
-static void PrintAllComments(const DescriptorType* desc, Printer* printer) {
-  std::vector<grpc::string> comments;
-  grpc_generator::GetComment(desc, grpc_generator::COMMENTTYPE_LEADING_DETACHED,
+void PrivateGenerator::PrintAllComments(const DescriptorType* descriptor) {
+  StringVector comments;
+  grpc_generator::GetComment(
+      descriptor, grpc_generator::COMMENTTYPE_LEADING_DETACHED, &comments);
+  grpc_generator::GetComment(descriptor, grpc_generator::COMMENTTYPE_LEADING,
                              &comments);
-  grpc_generator::GetComment(desc, grpc_generator::COMMENTTYPE_LEADING,
-                             &comments);
-  grpc_generator::GetComment(desc, grpc_generator::COMMENTTYPE_TRAILING,
+  grpc_generator::GetComment(descriptor, grpc_generator::COMMENTTYPE_TRAILING,
                              &comments);
   if (comments.empty()) {
     return;
   }
-  printer->Print("\"\"\"");
-  for (auto it = comments.begin(); it != comments.end(); ++it) {
+  out->Print("\"\"\"");
+  for (StringVector::iterator it = comments.begin(); it != comments.end();
+       ++it) {
     size_t start_pos = it->find_first_not_of(' ');
     if (start_pos != grpc::string::npos) {
-      printer->Print(it->c_str() + start_pos);
+      out->Print(it->c_str() + start_pos);
     }
-    printer->Print("\n");
+    out->Print("\n");
   }
-  printer->Print("\"\"\"\n");
+  out->Print("\"\"\"\n");
 }
 
-bool PrintBetaServicer(const ServiceDescriptor* service, Printer* out) {
+bool PrivateGenerator::PrintBetaServicer(const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print("class Beta$Service$Servicer(object):\n", "Service",
              service->name());
@@ -241,16 +241,16 @@ bool PrintBetaServicer(const ServiceDescriptor* service, Printer* out) {
         "generated\n"
         "only to ease transition from grpcio<0.15.0 to "
         "grpcio>=0.15.0.\"\"\"\n");
-    PrintAllComments(service, out);
+    PrintAllComments(service);
     for (int i = 0; i < service->method_count(); ++i) {
-      auto meth = service->method(i);
+      const MethodDescriptor* method = service->method(i);
       grpc::string arg_name =
-          meth->client_streaming() ? "request_iterator" : "request";
+          method->client_streaming() ? "request_iterator" : "request";
       out->Print("def $Method$(self, $ArgName$, context):\n", "Method",
-                 meth->name(), "ArgName", arg_name);
+                 method->name(), "ArgName", arg_name);
       {
         IndentScope raii_method_indent(out);
-        PrintAllComments(meth, out);
+        PrintAllComments(method);
         out->Print("context.code(beta_interfaces.StatusCode.UNIMPLEMENTED)\n");
       }
     }
@@ -258,7 +258,7 @@ bool PrintBetaServicer(const ServiceDescriptor* service, Printer* out) {
   return true;
 }
 
-bool PrintBetaStub(const ServiceDescriptor* service, Printer* out) {
+bool PrivateGenerator::PrintBetaStub(const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print("class Beta$Service$Stub(object):\n", "Service", service->name());
   {
@@ -270,30 +270,33 @@ bool PrintBetaStub(const ServiceDescriptor* service, Printer* out) {
         "generated\n"
         "only to ease transition from grpcio<0.15.0 to "
         "grpcio>=0.15.0.\"\"\"\n");
-    PrintAllComments(service, out);
+    PrintAllComments(service);
     for (int i = 0; i < service->method_count(); ++i) {
-      const MethodDescriptor* meth = service->method(i);
+      const MethodDescriptor* method = service->method(i);
       grpc::string arg_name =
-          meth->client_streaming() ? "request_iterator" : "request";
-      auto methdict = ListToDict({"Method", meth->name(), "ArgName", arg_name});
-      out->Print(methdict,
+          method->client_streaming() ? "request_iterator" : "request";
+      StringMap method_dict;
+      method_dict["Method"] = method->name();
+      method_dict["ArgName"] = arg_name;
+      out->Print(method_dict,
                  "def $Method$(self, $ArgName$, timeout, metadata=None, "
                  "with_call=False, protocol_options=None):\n");
       {
         IndentScope raii_method_indent(out);
-        PrintAllComments(meth, out);
+        PrintAllComments(method);
         out->Print("raise NotImplementedError()\n");
       }
-      if (!meth->server_streaming()) {
-        out->Print(methdict, "$Method$.future = None\n");
+      if (!method->server_streaming()) {
+        out->Print(method_dict, "$Method$.future = None\n");
       }
     }
   }
   return true;
 }
 
-bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
-                            const ServiceDescriptor* service, Printer* out) {
+bool PrivateGenerator::PrintBetaServerFactory(
+    const grpc::string& package_qualified_service_name,
+    const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print(
       "def beta_create_$Service$_server(servicer, pool=None, "
@@ -307,9 +310,9 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
         "file not marked beta) for all further purposes. This function was\n"
         "generated only to ease transition from grpcio<0.15.0 to grpcio>=0.15.0"
         "\"\"\"\n");
-    map<grpc::string, grpc::string> method_implementation_constructors;
-    map<grpc::string, grpc::string> input_message_modules_and_classes;
-    map<grpc::string, grpc::string> output_message_modules_and_classes;
+    StringMap method_implementation_constructors;
+    StringMap input_message_modules_and_classes;
+    StringMap output_message_modules_and_classes;
     for (int i = 0; i < service->method_count(); ++i) {
       const MethodDescriptor* method = service->method(i);
       const grpc::string method_implementation_constructor =
@@ -317,12 +320,12 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
           grpc::string(method->server_streaming() ? "stream_" : "unary_") +
           "inline";
       grpc::string input_message_module_and_class;
-      if (!GetModuleAndMessagePath(method->input_type(), service,
+      if (!GetModuleAndMessagePath(method->input_type(),
                                    &input_message_module_and_class)) {
         return false;
       }
       grpc::string output_message_module_and_class;
-      if (!GetModuleAndMessagePath(method->output_type(), service,
+      if (!GetModuleAndMessagePath(method->output_type(),
                                    &output_message_module_and_class)) {
         return false;
       }
@@ -334,7 +337,7 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
           make_pair(method->name(), output_message_module_and_class));
     }
     out->Print("request_deserializers = {\n");
-    for (auto name_and_input_module_class_pair =
+    for (StringMap::iterator name_and_input_module_class_pair =
              input_message_modules_and_classes.begin();
          name_and_input_module_class_pair !=
          input_message_modules_and_classes.end();
@@ -349,7 +352,7 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
     }
     out->Print("}\n");
     out->Print("response_serializers = {\n");
-    for (auto name_and_output_module_class_pair =
+    for (StringMap::iterator name_and_output_module_class_pair =
              output_message_modules_and_classes.begin();
          name_and_output_module_class_pair !=
          output_message_modules_and_classes.end();
@@ -365,7 +368,7 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
     }
     out->Print("}\n");
     out->Print("method_implementations = {\n");
-    for (auto name_and_implementation_constructor =
+    for (StringMap::iterator name_and_implementation_constructor =
              method_implementation_constructors.begin();
          name_and_implementation_constructor !=
          method_implementation_constructors.end();
@@ -395,11 +398,11 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name,
   return true;
 }
 
-bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
-                          const ServiceDescriptor* service, Printer* out) {
-  map<grpc::string, grpc::string> dict = ListToDict({
-      "Service", service->name(),
-  });
+bool PrivateGenerator::PrintBetaStubFactory(
+    const grpc::string& package_qualified_service_name,
+    const ServiceDescriptor* service) {
+  StringMap dict;
+  dict["Service"] = service->name();
   out->Print("\n\n");
   out->Print(dict,
              "def beta_create_$Service$_stub(channel, host=None,"
@@ -412,21 +415,21 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
         "file not marked beta) for all further purposes. This function was\n"
         "generated only to ease transition from grpcio<0.15.0 to grpcio>=0.15.0"
         "\"\"\"\n");
-    map<grpc::string, grpc::string> method_cardinalities;
-    map<grpc::string, grpc::string> input_message_modules_and_classes;
-    map<grpc::string, grpc::string> output_message_modules_and_classes;
+    StringMap method_cardinalities;
+    StringMap input_message_modules_and_classes;
+    StringMap output_message_modules_and_classes;
     for (int i = 0; i < service->method_count(); ++i) {
       const MethodDescriptor* method = service->method(i);
       const grpc::string method_cardinality =
           grpc::string(method->client_streaming() ? "STREAM" : "UNARY") + "_" +
           grpc::string(method->server_streaming() ? "STREAM" : "UNARY");
       grpc::string input_message_module_and_class;
-      if (!GetModuleAndMessagePath(method->input_type(), service,
+      if (!GetModuleAndMessagePath(method->input_type(),
                                    &input_message_module_and_class)) {
         return false;
       }
       grpc::string output_message_module_and_class;
-      if (!GetModuleAndMessagePath(method->output_type(), service,
+      if (!GetModuleAndMessagePath(method->output_type(),
                                    &output_message_module_and_class)) {
         return false;
       }
@@ -438,7 +441,7 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
           make_pair(method->name(), output_message_module_and_class));
     }
     out->Print("request_serializers = {\n");
-    for (auto name_and_input_module_class_pair =
+    for (StringMap::iterator name_and_input_module_class_pair =
              input_message_modules_and_classes.begin();
          name_and_input_module_class_pair !=
          input_message_modules_and_classes.end();
@@ -453,7 +456,7 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
     }
     out->Print("}\n");
     out->Print("response_deserializers = {\n");
-    for (auto name_and_output_module_class_pair =
+    for (StringMap::iterator name_and_output_module_class_pair =
              output_message_modules_and_classes.begin();
          name_and_output_module_class_pair !=
          output_message_modules_and_classes.end();
@@ -469,7 +472,8 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
     }
     out->Print("}\n");
     out->Print("cardinalities = {\n");
-    for (auto name_and_cardinality = method_cardinalities.begin();
+    for (StringMap::iterator name_and_cardinality =
+             method_cardinalities.begin();
          name_and_cardinality != method_cardinalities.end();
          name_and_cardinality++) {
       IndentScope raii_descriptions_indent(out);
@@ -493,13 +497,14 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
   return true;
 }
 
-bool PrintStub(const grpc::string& package_qualified_service_name,
-               const ServiceDescriptor* service, Printer* out) {
+bool PrivateGenerator::PrintStub(
+    const grpc::string& package_qualified_service_name,
+    const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print("class $Service$Stub(object):\n", "Service", service->name());
   {
     IndentScope raii_class_indent(out);
-    PrintAllComments(service, out);
+    PrintAllComments(service);
     out->Print("\n");
     out->Print("def __init__(self, channel):\n");
     {
@@ -513,17 +518,17 @@ bool PrintStub(const grpc::string& package_qualified_service_name,
       }
       out->Print("\"\"\"\n");
       for (int i = 0; i < service->method_count(); ++i) {
-        auto method = service->method(i);
-        auto multi_callable_constructor =
+        const MethodDescriptor* method = service->method(i);
+        grpc::string multi_callable_constructor =
             grpc::string(method->client_streaming() ? "stream" : "unary") +
             "_" + grpc::string(method->server_streaming() ? "stream" : "unary");
         grpc::string request_module_and_class;
-        if (!GetModuleAndMessagePath(method->input_type(), service,
+        if (!GetModuleAndMessagePath(method->input_type(),
                                      &request_module_and_class)) {
           return false;
         }
         grpc::string response_module_and_class;
-        if (!GetModuleAndMessagePath(method->output_type(), service,
+        if (!GetModuleAndMessagePath(method->output_type(),
                                      &response_module_and_class)) {
           return false;
         }
@@ -550,14 +555,14 @@ bool PrintStub(const grpc::string& package_qualified_service_name,
   return true;
 }
 
-bool PrintServicer(const ServiceDescriptor* service, Printer* out) {
+bool PrivateGenerator::PrintServicer(const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print("class $Service$Servicer(object):\n", "Service", service->name());
   {
     IndentScope raii_class_indent(out);
-    PrintAllComments(service, out);
+    PrintAllComments(service);
     for (int i = 0; i < service->method_count(); ++i) {
-      auto method = service->method(i);
+      const MethodDescriptor* method = service->method(i);
       grpc::string arg_name =
           method->client_streaming() ? "request_iterator" : "request";
       out->Print("\n");
@@ -565,7 +570,7 @@ bool PrintServicer(const ServiceDescriptor* service, Printer* out) {
                  method->name(), "ArgName", arg_name);
       {
         IndentScope raii_method_indent(out);
-        PrintAllComments(method, out);
+        PrintAllComments(method);
         out->Print("context.set_code(grpc.StatusCode.UNIMPLEMENTED)\n");
         out->Print("context.set_details('Method not implemented!')\n");
         out->Print("raise NotImplementedError('Method not implemented!')\n");
@@ -575,9 +580,9 @@ bool PrintServicer(const ServiceDescriptor* service, Printer* out) {
   return true;
 }
 
-bool PrintAddServicerToServer(
+bool PrivateGenerator::PrintAddServicerToServer(
     const grpc::string& package_qualified_service_name,
-    const ServiceDescriptor* service, Printer* out) {
+    const ServiceDescriptor* service) {
   out->Print("\n\n");
   out->Print("def add_$Service$Servicer_to_server(servicer, server):\n",
              "Service", service->name());
@@ -588,19 +593,19 @@ bool PrintAddServicerToServer(
       IndentScope raii_dict_first_indent(out);
       IndentScope raii_dict_second_indent(out);
       for (int i = 0; i < service->method_count(); ++i) {
-        auto method = service->method(i);
-        auto method_handler_constructor =
+        const MethodDescriptor* method = service->method(i);
+        grpc::string method_handler_constructor =
             grpc::string(method->client_streaming() ? "stream" : "unary") +
             "_" +
             grpc::string(method->server_streaming() ? "stream" : "unary") +
             "_rpc_method_handler";
         grpc::string request_module_and_class;
-        if (!GetModuleAndMessagePath(method->input_type(), service,
+        if (!GetModuleAndMessagePath(method->input_type(),
                                      &request_module_and_class)) {
           return false;
         }
         grpc::string response_module_and_class;
-        if (!GetModuleAndMessagePath(method->output_type(), service,
+        if (!GetModuleAndMessagePath(method->output_type(),
                                      &response_module_and_class)) {
           return false;
         }
@@ -635,53 +640,191 @@ bool PrintAddServicerToServer(
   return true;
 }
 
-bool PrintPreamble(const FileDescriptor* file,
-                   const GeneratorConfiguration& config, Printer* out) {
-  out->Print("import $Package$\n", "Package", config.grpc_package_root);
+bool PrivateGenerator::PrintBetaPreamble() {
   out->Print("from $Package$ import implementations as beta_implementations\n",
              "Package", config.beta_package_root);
   out->Print("from $Package$ import interfaces as beta_interfaces\n", "Package",
              config.beta_package_root);
+  return true;
+}
+
+bool PrivateGenerator::PrintPreamble() {
+  out->Print("import $Package$\n", "Package", config.grpc_package_root);
   out->Print("from grpc.framework.common import cardinality\n");
   out->Print(
       "from grpc.framework.interfaces.face import utilities as "
       "face_utilities\n");
+  if (generate_in_pb2_grpc) {
+    out->Print("\n");
+    StringPairSet imports_set;
+    for (int i = 0; i < file->service_count(); ++i) {
+      const ServiceDescriptor* service = file->service(i);
+      for (int j = 0; j < service->method_count(); ++j) {
+        const MethodDescriptor* method = service->method(j);
+        const Descriptor* types[2] = {method->input_type(),
+                                      method->output_type()};
+        for (int k = 0; k < 2; ++k) {
+          const Descriptor* type = types[k];
+          grpc::string type_file_name = type->file()->name();
+          grpc::string module_name = ModuleName(type_file_name);
+          grpc::string module_alias = ModuleAlias(type_file_name);
+          imports_set.insert(std::make_tuple(module_name, module_alias));
+        }
+      }
+    }
+    for (StringPairSet::iterator it = imports_set.begin();
+         it != imports_set.end(); ++it) {
+      out->Print("import $ModuleName$ as $ModuleAlias$\n", "ModuleName",
+                 std::get<0>(*it), "ModuleAlias", std::get<1>(*it));
+    }
+  }
   return true;
 }
 
-}  // namespace
+bool PrivateGenerator::PrintGAServices() {
+  grpc::string package = file->package();
+  if (!package.empty()) {
+    package = package.append(".");
+  }
+  for (int i = 0; i < file->service_count(); ++i) {
+    const ServiceDescriptor* service = file->service(i);
+    grpc::string package_qualified_service_name = package + service->name();
+    if (!(PrintStub(package_qualified_service_name, service) &&
+          PrintServicer(service) &&
+          PrintAddServicerToServer(package_qualified_service_name, service))) {
+      return false;
+    }
+  }
+  return true;
+}
 
-pair<bool, grpc::string> GetServices(const FileDescriptor* file,
-                                     const GeneratorConfiguration& config) {
+bool PrivateGenerator::PrintBetaServices() {
+  grpc::string package = file->package();
+  if (!package.empty()) {
+    package = package.append(".");
+  }
+  for (int i = 0; i < file->service_count(); ++i) {
+    const ServiceDescriptor* service = file->service(i);
+    grpc::string package_qualified_service_name = package + service->name();
+    if (!(PrintBetaServicer(service) && PrintBetaStub(service) &&
+          PrintBetaServerFactory(package_qualified_service_name, service) &&
+          PrintBetaStubFactory(package_qualified_service_name, service))) {
+      return false;
+    }
+  }
+  return true;
+}
+
+pair<bool, grpc::string> PrivateGenerator::GetGrpcServices() {
   grpc::string output;
   {
     // Scope the output stream so it closes and finalizes output to the string.
     StringOutputStream output_stream(&output);
-    Printer out(&output_stream, '$');
-    if (!PrintPreamble(file, config, &out)) {
-      return make_pair(false, "");
-    }
-    auto package = file->package();
-    if (!package.empty()) {
-      package = package.append(".");
-    }
-    for (int i = 0; i < file->service_count(); ++i) {
-      auto service = file->service(i);
-      auto package_qualified_service_name = package + service->name();
-      if (!(PrintStub(package_qualified_service_name, service, &out) &&
-            PrintServicer(service, &out) &&
-            PrintAddServicerToServer(package_qualified_service_name, service,
-                                     &out) &&
-            PrintBetaServicer(service, &out) && PrintBetaStub(service, &out) &&
-            PrintBetaServerFactory(package_qualified_service_name, service,
-                                   &out) &&
-            PrintBetaStubFactory(package_qualified_service_name, service,
-                                 &out))) {
+    Printer out_printer(&output_stream, '$');
+    out = &out_printer;
+
+    if (generate_in_pb2_grpc) {
+      if (!PrintPreamble()) {
+        return make_pair(false, "");
+      }
+      if (!PrintGAServices()) {
         return make_pair(false, "");
       }
+    } else {
+      out->Print("try:\n");
+      {
+        IndentScope raii_dict_try_indent(out);
+        out->Print(
+            "# THESE ELEMENTS WILL BE DEPRECATED.\n"
+            "# Please use the generated *_pb2_grpc.py files instead.\n");
+        if (!PrintPreamble()) {
+          return make_pair(false, "");
+        }
+        if (!PrintBetaPreamble()) {
+          return make_pair(false, "");
+        }
+        if (!PrintGAServices()) {
+          return make_pair(false, "");
+        }
+        if (!PrintBetaServices()) {
+          return make_pair(false, "");
+        }
+      }
+      out->Print("except ImportError:\n");
+      {
+        IndentScope raii_dict_except_indent(out);
+        out->Print("pass");
+      }
     }
   }
   return make_pair(true, std::move(output));
 }
 
+}  // namespace
+
+GeneratorConfiguration::GeneratorConfiguration()
+    : grpc_package_root("grpc"), beta_package_root("grpc.beta") {}
+
+PythonGrpcGenerator::PythonGrpcGenerator(const GeneratorConfiguration& config)
+    : config_(config) {}
+
+PythonGrpcGenerator::~PythonGrpcGenerator() {}
+
+static bool GenerateGrpc(GeneratorContext* context, PrivateGenerator& generator,
+                         grpc::string file_name, bool generate_in_pb2_grpc) {
+  bool success;
+  std::unique_ptr<ZeroCopyOutputStream> output;
+  std::unique_ptr<CodedOutputStream> coded_output;
+  grpc::string grpc_code;
+
+  if (generate_in_pb2_grpc) {
+    output.reset(context->Open(file_name));
+    generator.generate_in_pb2_grpc = true;
+  } else {
+    output.reset(context->OpenForInsert(file_name, "module_scope"));
+    generator.generate_in_pb2_grpc = false;
+  }
+
+  coded_output.reset(new CodedOutputStream(output.get()));
+  tie(success, grpc_code) = generator.GetGrpcServices();
+
+  if (success) {
+    coded_output->WriteRaw(grpc_code.data(), grpc_code.size());
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool PythonGrpcGenerator::Generate(const FileDescriptor* file,
+                                   const grpc::string& parameter,
+                                   GeneratorContext* context,
+                                   grpc::string* error) const {
+  // Get output file name.
+  grpc::string pb2_file_name;
+  grpc::string pb2_grpc_file_name;
+  static const int proto_suffix_length = strlen(".proto");
+  if (file->name().size() > static_cast<size_t>(proto_suffix_length) &&
+      file->name().find_last_of(".proto") == file->name().size() - 1) {
+    grpc::string base =
+        file->name().substr(0, file->name().size() - proto_suffix_length);
+    pb2_file_name = base + "_pb2.py";
+    pb2_grpc_file_name = base + "_pb2_grpc.py";
+  } else {
+    *error = "Invalid proto file name. Proto file must end with .proto";
+    return false;
+  }
+
+  PrivateGenerator generator(config_, file);
+  if (parameter == "grpc_2_0") {
+    return GenerateGrpc(context, generator, pb2_grpc_file_name, true);
+  } else if (parameter == "") {
+    return GenerateGrpc(context, generator, pb2_grpc_file_name, true) &&
+           GenerateGrpc(context, generator, pb2_file_name, false);
+  } else {
+    *error = "Invalid parameter '" + parameter + "'.";
+    return false;
+  }
+}
+
 }  // namespace grpc_python_generator
diff --git a/src/compiler/python_generator.h b/src/compiler/python_generator.h
index 9bbb83bca6..6a95255d40 100644
--- a/src/compiler/python_generator.h
+++ b/src/compiler/python_generator.h
@@ -62,10 +62,6 @@ class PythonGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
   GeneratorConfiguration config_;
 };
 
-std::pair<bool, grpc::string> GetServices(
-    const grpc::protobuf::FileDescriptor* file,
-    const GeneratorConfiguration& config);
-
 }  // namespace grpc_python_generator
 
 #endif  // GRPC_INTERNAL_COMPILER_PYTHON_GENERATOR_H
diff --git a/src/compiler/ruby_generator.cc b/src/compiler/ruby_generator.cc
index 02202568cb..c85babf1b8 100644
--- a/src/compiler/ruby_generator.cc
+++ b/src/compiler/ruby_generator.cc
@@ -119,6 +119,43 @@ void PrintService(const ServiceDescriptor *service, const grpc::string &package,
 
 }  // namespace
 
+// The following functions are copied directly from the source for the protoc
+// ruby generator
+// to ensure compatibility (with the exception of int and string type changes).
+// See
+// https://github.com/google/protobuf/blob/master/src/google/protobuf/compiler/ruby/ruby_generator.cc#L250
+// TODO: keep up to date with protoc code generation, though this behavior isn't
+// expected to change
+bool IsLower(char ch) { return ch >= 'a' && ch <= 'z'; }
+
+char ToUpper(char ch) { return IsLower(ch) ? (ch - 'a' + 'A') : ch; }
+
+// Package names in protobuf are snake_case by convention, but Ruby module
+// names must be PascalCased.
+//
+//   foo_bar_baz -> FooBarBaz
+grpc::string PackageToModule(const grpc::string &name) {
+  bool next_upper = true;
+  grpc::string result;
+  result.reserve(name.size());
+
+  for (grpc::string::size_type i = 0; i < name.size(); i++) {
+    if (name[i] == '_') {
+      next_upper = true;
+    } else {
+      if (next_upper) {
+        result.push_back(ToUpper(name[i]));
+      } else {
+        result.push_back(name[i]);
+      }
+      next_upper = false;
+    }
+  }
+
+  return result;
+}
+// end copying of protoc generator for ruby code
+
 grpc::string GetServices(const FileDescriptor *file) {
   grpc::string output;
   {
@@ -162,7 +199,7 @@ grpc::string GetServices(const FileDescriptor *file) {
     std::vector<grpc::string> modules = Split(file->package(), '.');
     for (size_t i = 0; i < modules.size(); ++i) {
       std::map<grpc::string, grpc::string> module_vars = ListToDict({
-          "module.name", CapitalizeFirst(modules[i]),
+          "module.name", PackageToModule(modules[i]),
       });
       out.Print(module_vars, "module $module.name$\n");
       out.Indent();
diff --git a/src/core/ext/census/census_log.h b/src/core/ext/census/census_log.h
index 534ecc5705..1b185a53b9 100644
--- a/src/core/ext/census/census_log.h
+++ b/src/core/ext/census/census_log.h
@@ -84,7 +84,7 @@ const void *census_log_read_next(size_t *bytes_available);
 */
 size_t census_log_remaining_space(void);
 
-/* Returns the number of times gprc_stats_log_start_write() failed due to
+/* Returns the number of times grpc_stats_log_start_write() failed due to
    out-of-space. */
 int census_log_out_of_space_count(void);
 
diff --git a/src/core/ext/census/grpc_filter.c b/src/core/ext/census/grpc_filter.c
index a4cf6f37bd..3e8acc85e1 100644
--- a/src/core/ext/census/grpc_filter.c
+++ b/src/core/ext/census/grpc_filter.c
@@ -37,9 +37,9 @@
 #include <string.h>
 
 #include <grpc/census.h>
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 #include <grpc/support/time.h>
 
 #include "src/core/ext/census/census_interface.h"
@@ -69,7 +69,7 @@ static void extract_and_annotate_method_tag(grpc_metadata_batch *md,
   for (m = md->list.head; m != NULL; m = m->next) {
     if (m->md->key == GRPC_MDSTR_PATH) {
       gpr_log(GPR_DEBUG, "%s",
-              (const char *)GPR_SLICE_START_PTR(m->md->value->slice));
+              (const char *)GRPC_SLICE_START_PTR(m->md->value->slice));
       /* Add method tag here */
     }
   }
@@ -167,11 +167,12 @@ static void server_destroy_call_elem(grpc_exec_ctx *exec_ctx,
   /* TODO(hongyu): record rpc server stats and census_tracing_end_op here */
 }
 
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   channel_data *chand = elem->channel_data;
   GPR_ASSERT(chand != NULL);
+  return GRPC_ERROR_NONE;
 }
 
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
@@ -191,6 +192,7 @@ const grpc_channel_filter grpc_client_census_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "census-client"};
 
 const grpc_channel_filter grpc_server_census_filter = {
@@ -204,4 +206,5 @@ const grpc_channel_filter grpc_server_census_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "census-server"};
diff --git a/src/core/ext/census/mlog.h b/src/core/ext/census/mlog.h
index a256426f91..18805ad994 100644
--- a/src/core/ext/census/mlog.h
+++ b/src/core/ext/census/mlog.h
@@ -88,7 +88,7 @@ const void* census_log_read_next(size_t* bytes_available);
 */
 size_t census_log_remaining_space(void);
 
-/* Returns the number of times gprc_stats_log_start_write() failed due to
+/* Returns the number of times grpc_stats_log_start_write() failed due to
    out-of-space. */
 int64_t census_log_out_of_space_count(void);
 
diff --git a/src/core/ext/census/trace_context.h b/src/core/ext/census/trace_context.h
index ee71fef460..1cb5e26ea7 100644
--- a/src/core/ext/census/trace_context.h
+++ b/src/core/ext/census/trace_context.h
@@ -65,4 +65,4 @@ of these do not exist. On success, returns true and false otherwise. */
 bool decode_trace_context(google_trace_TraceContext *ctxt, uint8_t *buffer,
                           const size_t nbytes);
 
-#endif
+#endif /* GRPC_CORE_EXT_CENSUS_TRACE_CONTEXT_H */
diff --git a/src/core/ext/client_channel/client_channel.c b/src/core/ext/client_channel/client_channel.c
index ff773ac334..9d46338428 100644
--- a/src/core/ext/client_channel/client_channel.c
+++ b/src/core/ext/client_channel/client_channel.c
@@ -39,10 +39,12 @@
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/ext/client_channel/lb_policy_registry.h"
+#include "src/core/ext/client_channel/resolver_registry.h"
 #include "src/core/ext/client_channel/subchannel.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/connected_channel.h"
@@ -55,7 +57,7 @@
 #include "src/core/lib/transport/connectivity_state.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/metadata_batch.h"
-#include "src/core/lib/transport/method_config.h"
+#include "src/core/lib/transport/service_config.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 /* Client channel implementation */
@@ -81,30 +83,61 @@ static void *method_parameters_copy(void *value) {
   return new_value;
 }
 
-static int method_parameters_cmp(void *value1, void *value2) {
-  const method_parameters *v1 = value1;
-  const method_parameters *v2 = value2;
-  const int retval = gpr_time_cmp(v1->timeout, v2->timeout);
-  if (retval != 0) return retval;
-  if (v1->wait_for_ready > v2->wait_for_ready) return 1;
-  if (v1->wait_for_ready < v2->wait_for_ready) return -1;
-  return 0;
-}
-
 static const grpc_mdstr_hash_table_vtable method_parameters_vtable = {
-    gpr_free, method_parameters_copy, method_parameters_cmp};
-
-static void *method_config_convert_value(
-    const grpc_method_config *method_config) {
+    gpr_free, method_parameters_copy};
+
+static void *method_parameters_create_from_json(const grpc_json *json) {
+  wait_for_ready_value wait_for_ready = WAIT_FOR_READY_UNSET;
+  gpr_timespec timeout = {0, 0, GPR_TIMESPAN};
+  for (grpc_json *field = json->child; field != NULL; field = field->next) {
+    if (field->key == NULL) continue;
+    if (strcmp(field->key, "waitForReady") == 0) {
+      if (wait_for_ready != WAIT_FOR_READY_UNSET) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_TRUE && field->type != GRPC_JSON_FALSE) {
+        return NULL;
+      }
+      wait_for_ready = field->type == GRPC_JSON_TRUE ? WAIT_FOR_READY_TRUE
+                                                     : WAIT_FOR_READY_FALSE;
+    } else if (strcmp(field->key, "timeout") == 0) {
+      if (timeout.tv_sec > 0 || timeout.tv_nsec > 0) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_STRING) return NULL;
+      size_t len = strlen(field->value);
+      if (field->value[len - 1] != 's') return NULL;
+      char *buf = gpr_strdup(field->value);
+      buf[len - 1] = '\0';  // Remove trailing 's'.
+      char *decimal_point = strchr(buf, '.');
+      if (decimal_point != NULL) {
+        *decimal_point = '\0';
+        timeout.tv_nsec = gpr_parse_nonnegative_int(decimal_point + 1);
+        if (timeout.tv_nsec == -1) {
+          gpr_free(buf);
+          return NULL;
+        }
+        // There should always be exactly 3, 6, or 9 fractional digits.
+        int multiplier = 1;
+        switch (strlen(decimal_point + 1)) {
+          case 9:
+            break;
+          case 6:
+            multiplier *= 1000;
+            break;
+          case 3:
+            multiplier *= 1000000;
+            break;
+          default:  // Unsupported number of digits.
+            gpr_free(buf);
+            return NULL;
+        }
+        timeout.tv_nsec *= multiplier;
+      }
+      timeout.tv_sec = gpr_parse_nonnegative_int(buf);
+      if (timeout.tv_sec == -1) return NULL;
+      gpr_free(buf);
+    }
+  }
   method_parameters *value = gpr_malloc(sizeof(method_parameters));
-  const gpr_timespec *timeout = grpc_method_config_get_timeout(method_config);
-  value->timeout = timeout != NULL ? *timeout : gpr_time_0(GPR_TIMESPAN);
-  const bool *wait_for_ready =
-      grpc_method_config_get_wait_for_ready(method_config);
-  value->wait_for_ready =
-      wait_for_ready == NULL
-          ? WAIT_FOR_READY_UNSET
-          : (wait_for_ready ? WAIT_FOR_READY_TRUE : WAIT_FOR_READY_FALSE);
+  value->timeout = timeout;
+  value->wait_for_ready = wait_for_ready;
   return value;
 }
 
@@ -123,7 +156,10 @@ typedef struct client_channel_channel_data {
   /** mutex protecting all variables below in this data structure */
   gpr_mu mu;
   /** currently active load balancer */
+  char *lb_policy_name;
   grpc_lb_policy *lb_policy;
+  /** service config in JSON form */
+  char *service_config_json;
   /** maps method names to method_parameters structs */
   grpc_mdstr_hash_table *method_params_table;
   /** incoming resolver result - set by resolver.next() */
@@ -223,22 +259,19 @@ static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand,
 static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                        grpc_error *error) {
   channel_data *chand = arg;
+  char *lb_policy_name = NULL;
   grpc_lb_policy *lb_policy = NULL;
   grpc_lb_policy *old_lb_policy;
   grpc_mdstr_hash_table *method_params_table = NULL;
   grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE;
   bool exit_idle = false;
   grpc_error *state_error = GRPC_ERROR_CREATE("No load balancing policy");
+  char *service_config_json = NULL;
 
   if (chand->resolver_result != NULL) {
-    grpc_lb_policy_args lb_policy_args;
-    lb_policy_args.args = chand->resolver_result;
-    lb_policy_args.client_channel_factory = chand->client_channel_factory;
-
     // Find LB policy name.
-    const char *lb_policy_name = NULL;
     const grpc_arg *channel_arg =
-        grpc_channel_args_find(lb_policy_args.args, GRPC_ARG_LB_POLICY_NAME);
+        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_POLICY_NAME);
     if (channel_arg != NULL) {
       GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
       lb_policy_name = channel_arg->value.string;
@@ -247,7 +280,7 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
     // assume that we should use the grpclb policy, regardless of what the
     // resolver actually specified.
     channel_arg =
-        grpc_channel_args_find(lb_policy_args.args, GRPC_ARG_LB_ADDRESSES);
+        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_ADDRESSES);
     if (channel_arg != NULL) {
       GPR_ASSERT(channel_arg->type == GRPC_ARG_POINTER);
       grpc_lb_addresses *addresses = channel_arg->value.pointer.p;
@@ -272,7 +305,10 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
     // Use pick_first if nothing was specified and we didn't select grpclb
     // above.
     if (lb_policy_name == NULL) lb_policy_name = "pick_first";
-
+    // Instantiate LB policy.
+    grpc_lb_policy_args lb_policy_args;
+    lb_policy_args.args = chand->resolver_result;
+    lb_policy_args.client_channel_factory = chand->client_channel_factory;
     lb_policy =
         grpc_lb_policy_create(exec_ctx, lb_policy_name, &lb_policy_args);
     if (lb_policy != NULL) {
@@ -281,14 +317,25 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
       state =
           grpc_lb_policy_check_connectivity(exec_ctx, lb_policy, &state_error);
     }
+    // Find service config.
     channel_arg =
-        grpc_channel_args_find(lb_policy_args.args, GRPC_ARG_SERVICE_CONFIG);
+        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_SERVICE_CONFIG);
     if (channel_arg != NULL) {
-      GPR_ASSERT(channel_arg->type == GRPC_ARG_POINTER);
-      method_params_table = grpc_method_config_table_convert(
-          (grpc_method_config_table *)channel_arg->value.pointer.p,
-          method_config_convert_value, &method_parameters_vtable);
+      GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
+      service_config_json = gpr_strdup(channel_arg->value.string);
+      grpc_service_config *service_config =
+          grpc_service_config_create(service_config_json);
+      if (service_config != NULL) {
+        method_params_table = grpc_service_config_create_method_config_table(
+            service_config, method_parameters_create_from_json,
+            &method_parameters_vtable);
+        grpc_service_config_destroy(service_config);
+      }
     }
+    // Before we clean up, save a copy of lb_policy_name, since it might
+    // be pointing to data inside chand->resolver_result.
+    // The copy will be saved in chand->lb_policy_name below.
+    lb_policy_name = gpr_strdup(lb_policy_name);
     grpc_channel_args_destroy(chand->resolver_result);
     chand->resolver_result = NULL;
   }
@@ -299,8 +346,16 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
   }
 
   gpr_mu_lock(&chand->mu);
+  if (lb_policy_name != NULL) {
+    gpr_free(chand->lb_policy_name);
+    chand->lb_policy_name = lb_policy_name;
+  }
   old_lb_policy = chand->lb_policy;
   chand->lb_policy = lb_policy;
+  if (service_config_json != NULL) {
+    gpr_free(chand->service_config_json);
+    chand->service_config_json = service_config_json;
+  }
   if (chand->method_params_table != NULL) {
     grpc_mdstr_hash_table_unref(chand->method_params_table);
   }
@@ -426,25 +481,58 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&chand->mu);
 }
 
-/* Constructor for channel_data */
-static void cc_init_channel_elem(grpc_exec_ctx *exec_ctx,
-                                 grpc_channel_element *elem,
-                                 grpc_channel_element_args *args) {
+static void cc_get_channel_info(grpc_exec_ctx *exec_ctx,
+                                grpc_channel_element *elem,
+                                const grpc_channel_info *info) {
   channel_data *chand = elem->channel_data;
+  gpr_mu_lock(&chand->mu);
+  if (info->lb_policy_name != NULL) {
+    *info->lb_policy_name = chand->lb_policy_name == NULL
+                                ? NULL
+                                : gpr_strdup(chand->lb_policy_name);
+  }
+  if (info->service_config_json != NULL) {
+    *info->service_config_json = chand->service_config_json == NULL
+                                     ? NULL
+                                     : gpr_strdup(chand->service_config_json);
+  }
+  gpr_mu_unlock(&chand->mu);
+}
 
+/* Constructor for channel_data */
+static grpc_error *cc_init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_element *elem,
+                                        grpc_channel_element_args *args) {
+  channel_data *chand = elem->channel_data;
   memset(chand, 0, sizeof(*chand));
-
   GPR_ASSERT(args->is_last);
   GPR_ASSERT(elem->filter == &grpc_client_channel_filter);
-
+  // Initialize data members.
   gpr_mu_init(&chand->mu);
+  chand->owning_stack = args->channel_stack;
   grpc_closure_init(&chand->on_resolver_result_changed,
                     on_resolver_result_changed, chand);
-  chand->owning_stack = args->channel_stack;
-
+  chand->interested_parties = grpc_pollset_set_create();
   grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
                                "client_channel");
-  chand->interested_parties = grpc_pollset_set_create();
+  // Record client channel factory.
+  const grpc_arg *arg = grpc_channel_args_find(args->channel_args,
+                                               GRPC_ARG_CLIENT_CHANNEL_FACTORY);
+  GPR_ASSERT(arg != NULL);
+  GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
+  grpc_client_channel_factory_ref(arg->value.pointer.p);
+  chand->client_channel_factory = arg->value.pointer.p;
+  // Instantiate resolver.
+  arg = grpc_channel_args_find(args->channel_args, GRPC_ARG_SERVER_URI);
+  GPR_ASSERT(arg != NULL);
+  GPR_ASSERT(arg->type == GRPC_ARG_STRING);
+  chand->resolver =
+      grpc_resolver_create(exec_ctx, arg->value.string, args->channel_args,
+                           chand->interested_parties);
+  if (chand->resolver == NULL) {
+    return GRPC_ERROR_CREATE("resolver creation failed");
+  }
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel_data */
@@ -465,6 +553,8 @@ static void cc_destroy_channel_elem(grpc_exec_ctx *exec_ctx,
                                      chand->interested_parties);
     GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
   }
+  gpr_free(chand->lb_policy_name);
+  gpr_free(chand->service_config_json);
   if (chand->method_params_table != NULL) {
     grpc_mdstr_hash_table_unref(chand->method_params_table);
   }
@@ -609,15 +699,21 @@ static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg,
                                      "Failed to create subchannel", &error, 1));
   } else if (GET_CALL(calld) == CANCELLED_CALL) {
     /* already cancelled before subchannel became ready */
-    fail_locked(exec_ctx, calld,
-                GRPC_ERROR_CREATE_REFERENCING(
-                    "Cancelled before creating subchannel", &error, 1));
+    grpc_error *cancellation_error = GRPC_ERROR_CREATE_REFERENCING(
+        "Cancelled before creating subchannel", &error, 1);
+    /* if due to deadline, attach the deadline exceeded status to the error */
+    if (gpr_time_cmp(calld->deadline, gpr_now(GPR_CLOCK_MONOTONIC)) < 0) {
+      cancellation_error =
+          grpc_error_set_int(cancellation_error, GRPC_ERROR_INT_GRPC_STATUS,
+                             GRPC_STATUS_DEADLINE_EXCEEDED);
+    }
+    fail_locked(exec_ctx, calld, cancellation_error);
   } else {
     /* Create call on subchannel. */
     grpc_subchannel_call *subchannel_call = NULL;
     grpc_error *new_error = grpc_connected_subchannel_create_call(
         exec_ctx, calld->connected_subchannel, calld->pollent, calld->path,
-        calld->deadline, &subchannel_call);
+        calld->call_start_time, calld->deadline, &subchannel_call);
     if (new_error != GRPC_ERROR_NONE) {
       new_error = grpc_error_add_child(new_error, error);
       subchannel_call = CANCELLED_CALL;
@@ -735,7 +831,6 @@ static bool pick_subchannel(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
         initial_metadata_flags &= ~GRPC_INITIAL_METADATA_WAIT_FOR_READY;
       }
     }
-    // TODO(dgq): make this deadline configurable somehow.
     const grpc_lb_policy_pick_args inputs = {
         initial_metadata, initial_metadata_flags, &calld->lb_token_mdelem,
         gpr_inf_future(GPR_CLOCK_MONOTONIC)};
@@ -870,7 +965,7 @@ retry:
     grpc_subchannel_call *subchannel_call = NULL;
     grpc_error *error = grpc_connected_subchannel_create_call(
         exec_ctx, calld->connected_subchannel, calld->pollent, calld->path,
-        calld->deadline, &subchannel_call);
+        calld->call_start_time, calld->deadline, &subchannel_call);
     if (error != GRPC_ERROR_NONE) {
       subchannel_call = CANCELLED_CALL;
       fail_locked(exec_ctx, calld, GRPC_ERROR_REF(error));
@@ -1052,33 +1147,10 @@ const grpc_channel_filter grpc_client_channel_filter = {
     cc_init_channel_elem,
     cc_destroy_channel_elem,
     cc_get_peer,
+    cc_get_channel_info,
     "client-channel",
 };
 
-void grpc_client_channel_finish_initialization(
-    grpc_exec_ctx *exec_ctx, grpc_channel_stack *channel_stack,
-    grpc_resolver *resolver,
-    grpc_client_channel_factory *client_channel_factory) {
-  /* post construction initialization: set the transport setup pointer */
-  GPR_ASSERT(client_channel_factory != NULL);
-  grpc_channel_element *elem = grpc_channel_stack_last_element(channel_stack);
-  channel_data *chand = elem->channel_data;
-  gpr_mu_lock(&chand->mu);
-  GPR_ASSERT(!chand->resolver);
-  chand->resolver = resolver;
-  GRPC_RESOLVER_REF(resolver, "channel");
-  if (!grpc_closure_list_empty(chand->waiting_for_config_closures) ||
-      chand->exit_idle_when_lb_policy_arrives) {
-    chand->started_resolving = true;
-    GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
-    grpc_resolver_next(exec_ctx, resolver, &chand->resolver_result,
-                       &chand->on_resolver_result_changed);
-  }
-  chand->client_channel_factory = client_channel_factory;
-  grpc_client_channel_factory_ref(client_channel_factory);
-  gpr_mu_unlock(&chand->mu);
-}
-
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect) {
   channel_data *chand = elem->channel_data;
diff --git a/src/core/ext/client_channel/client_channel.h b/src/core/ext/client_channel/client_channel.h
index ab5a84fdfb..f02587d0c1 100644
--- a/src/core/ext/client_channel/client_channel.h
+++ b/src/core/ext/client_channel/client_channel.h
@@ -38,6 +38,9 @@
 #include "src/core/ext/client_channel/resolver.h"
 #include "src/core/lib/channel/channel_stack.h"
 
+// Channel arg key for server URI string.
+#define GRPC_ARG_SERVER_URI "grpc.server_uri"
+
 /* A client channel is a channel that begins disconnected, and can connect
    to some endpoint on demand. If that endpoint disconnects, it will be
    connected to again later.
@@ -47,13 +50,6 @@
 
 extern const grpc_channel_filter grpc_client_channel_filter;
 
-/* Post-construction initializer to give the client channel its resolver
-   and factory. */
-void grpc_client_channel_finish_initialization(
-    grpc_exec_ctx *exec_ctx, grpc_channel_stack *channel_stack,
-    grpc_resolver *resolver,
-    grpc_client_channel_factory *client_channel_factory);
-
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect);
 
diff --git a/src/core/ext/client_channel/client_channel_factory.c b/src/core/ext/client_channel/client_channel_factory.c
index 4900832d57..4eb35dfcf7 100644
--- a/src/core/ext/client_channel/client_channel_factory.c
+++ b/src/core/ext/client_channel/client_channel_factory.c
@@ -55,3 +55,35 @@ grpc_channel* grpc_client_channel_factory_create_channel(
   return factory->vtable->create_client_channel(exec_ctx, factory, target, type,
                                                 args);
 }
+
+static void* factory_arg_copy(void* factory) {
+  grpc_client_channel_factory_ref(factory);
+  return factory;
+}
+
+static void factory_arg_destroy(void* factory) {
+  // TODO(roth): Remove local exec_ctx when
+  // https://github.com/grpc/grpc/pull/8705 is merged.
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_client_channel_factory_unref(&exec_ctx, factory);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static int factory_arg_cmp(void* factory1, void* factory2) {
+  if (factory1 < factory2) return -1;
+  if (factory1 > factory2) return 1;
+  return 0;
+}
+
+static const grpc_arg_pointer_vtable factory_arg_vtable = {
+    factory_arg_copy, factory_arg_destroy, factory_arg_cmp};
+
+grpc_arg grpc_client_channel_factory_create_channel_arg(
+    grpc_client_channel_factory* factory) {
+  grpc_arg arg;
+  arg.type = GRPC_ARG_POINTER;
+  arg.key = GRPC_ARG_CLIENT_CHANNEL_FACTORY;
+  arg.value.pointer.p = factory;
+  arg.value.pointer.vtable = &factory_arg_vtable;
+  return arg;
+}
diff --git a/src/core/ext/client_channel/client_channel_factory.h b/src/core/ext/client_channel/client_channel_factory.h
index 2b8fc577b3..bf2764b537 100644
--- a/src/core/ext/client_channel/client_channel_factory.h
+++ b/src/core/ext/client_channel/client_channel_factory.h
@@ -39,6 +39,9 @@
 #include "src/core/ext/client_channel/subchannel.h"
 #include "src/core/lib/channel/channel_stack.h"
 
+// Channel arg key for client channel factory.
+#define GRPC_ARG_CLIENT_CHANNEL_FACTORY "grpc.client_channel_factory"
+
 typedef struct grpc_client_channel_factory grpc_client_channel_factory;
 typedef struct grpc_client_channel_factory_vtable
     grpc_client_channel_factory_vtable;
@@ -83,4 +86,7 @@ grpc_channel *grpc_client_channel_factory_create_channel(
     const char *target, grpc_client_channel_type type,
     const grpc_channel_args *args);
 
+grpc_arg grpc_client_channel_factory_create_channel_arg(
+    grpc_client_channel_factory *factory);
+
 #endif /* GRPC_CORE_EXT_CLIENT_CHANNEL_CLIENT_CHANNEL_FACTORY_H */
diff --git a/src/core/ext/client_channel/connector.h b/src/core/ext/client_channel/connector.h
index ed7d5450de..3de061620e 100644
--- a/src/core/ext/client_channel/connector.h
+++ b/src/core/ext/client_channel/connector.h
@@ -52,7 +52,7 @@ typedef struct {
   const grpc_resolved_address *addr;
   size_t addr_len;
   /** initial connect string to send */
-  gpr_slice initial_connect_string;
+  grpc_slice initial_connect_string;
   /** deadline for connection */
   gpr_timespec deadline;
   /** channel arguments (to be passed to transport) */
diff --git a/src/core/ext/client_channel/default_initial_connect_string.c b/src/core/ext/client_channel/default_initial_connect_string.c
index 0b251372fd..6db82d84ef 100644
--- a/src/core/ext/client_channel/default_initial_connect_string.c
+++ b/src/core/ext/client_channel/default_initial_connect_string.c
@@ -31,8 +31,8 @@
  *
  */
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/lib/iomgr/resolve_address.h"
 
 void grpc_set_default_initial_connect_string(grpc_resolved_address **addr,
-                                             gpr_slice *initial_str) {}
+                                             grpc_slice *initial_str) {}
diff --git a/src/core/ext/client_channel/http_connect_handshaker.c b/src/core/ext/client_channel/http_connect_handshaker.c
index ea2cbbdd97..76c78ee853 100644
--- a/src/core/ext/client_channel/http_connect_handshaker.c
+++ b/src/core/ext/client_channel/http_connect_handshaker.c
@@ -35,15 +35,17 @@
 
 #include <string.h>
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/ext/client_channel/client_channel.h"
+#include "src/core/ext/client_channel/resolver_registry.h"
 #include "src/core/ext/client_channel/uri_parser.h"
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/http/format_request.h"
 #include "src/core/lib/http/parser.h"
-#include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/support/env.h"
 
 typedef struct http_connect_handshaker {
@@ -51,60 +53,105 @@ typedef struct http_connect_handshaker {
   grpc_handshaker base;
 
   char* proxy_server;
-  char* server_name;
+
+  gpr_refcount refcount;
+  gpr_mu mu;
+
+  bool shutdown;
+  // Endpoint and read buffer to destroy after a shutdown.
+  grpc_endpoint* endpoint_to_destroy;
+  grpc_slice_buffer* read_buffer_to_destroy;
 
   // State saved while performing the handshake.
-  grpc_endpoint* endpoint;
-  grpc_channel_args* args;
-  grpc_handshaker_done_cb cb;
-  void* user_data;
+  grpc_handshaker_args* args;
+  grpc_closure* on_handshake_done;
 
   // Objects for processing the HTTP CONNECT request and response.
-  gpr_slice_buffer write_buffer;
-  gpr_slice_buffer* read_buffer;  // Ownership passes through this object.
+  grpc_slice_buffer write_buffer;
   grpc_closure request_done_closure;
   grpc_closure response_read_closure;
   grpc_http_parser http_parser;
   grpc_http_response http_response;
-  grpc_timer timeout_timer;
-
-  gpr_refcount refcount;
 } http_connect_handshaker;
 
 // Unref and clean up handshaker.
-static void http_connect_handshaker_unref(http_connect_handshaker* handshaker) {
+static void http_connect_handshaker_unref(grpc_exec_ctx* exec_ctx,
+                                          http_connect_handshaker* handshaker) {
   if (gpr_unref(&handshaker->refcount)) {
+    gpr_mu_destroy(&handshaker->mu);
+    if (handshaker->endpoint_to_destroy != NULL) {
+      grpc_endpoint_destroy(exec_ctx, handshaker->endpoint_to_destroy);
+    }
+    if (handshaker->read_buffer_to_destroy != NULL) {
+      grpc_slice_buffer_destroy(handshaker->read_buffer_to_destroy);
+      gpr_free(handshaker->read_buffer_to_destroy);
+    }
     gpr_free(handshaker->proxy_server);
-    gpr_free(handshaker->server_name);
-    gpr_slice_buffer_destroy(&handshaker->write_buffer);
+    grpc_slice_buffer_destroy(&handshaker->write_buffer);
     grpc_http_parser_destroy(&handshaker->http_parser);
     grpc_http_response_destroy(&handshaker->http_response);
     gpr_free(handshaker);
   }
 }
 
-// Callback invoked when deadline is exceeded.
-static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  http_connect_handshaker* handshaker = arg;
-  if (error == GRPC_ERROR_NONE) {  // Timer fired, rather than being cancelled.
-    grpc_endpoint_shutdown(exec_ctx, handshaker->endpoint);
+// Set args fields to NULL, saving the endpoint and read buffer for
+// later destruction.
+static void cleanup_args_for_failure_locked(
+    http_connect_handshaker* handshaker) {
+  handshaker->endpoint_to_destroy = handshaker->args->endpoint;
+  handshaker->args->endpoint = NULL;
+  handshaker->read_buffer_to_destroy = handshaker->args->read_buffer;
+  handshaker->args->read_buffer = NULL;
+  grpc_channel_args_destroy(handshaker->args->args);
+  handshaker->args->args = NULL;
+}
+
+// If the handshake failed or we're shutting down, clean up and invoke the
+// callback with the error.
+static void handshake_failed_locked(grpc_exec_ctx* exec_ctx,
+                                    http_connect_handshaker* handshaker,
+                                    grpc_error* error) {
+  if (error == GRPC_ERROR_NONE) {
+    // If we were shut down after an endpoint operation succeeded but
+    // before the endpoint callback was invoked, we need to generate our
+    // own error.
+    error = GRPC_ERROR_CREATE("Handshaker shutdown");
+  }
+  if (!handshaker->shutdown) {
+    // TODO(ctiller): It is currently necessary to shutdown endpoints
+    // before destroying them, even if we know that there are no
+    // pending read/write callbacks.  This should be fixed, at which
+    // point this can be removed.
+    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint);
+    // Not shutting down, so the handshake failed.  Clean up before
+    // invoking the callback.
+    cleanup_args_for_failure_locked(handshaker);
+    // Set shutdown to true so that subsequent calls to
+    // http_connect_handshaker_shutdown() do nothing.
+    handshaker->shutdown = true;
   }
-  http_connect_handshaker_unref(handshaker);
+  // Invoke callback.
+  grpc_exec_ctx_sched(exec_ctx, handshaker->on_handshake_done, error, NULL);
 }
 
 // Callback invoked when finished writing HTTP CONNECT request.
 static void on_write_done(grpc_exec_ctx* exec_ctx, void* arg,
                           grpc_error* error) {
   http_connect_handshaker* handshaker = arg;
-  if (error != GRPC_ERROR_NONE) {
-    // If the write failed, invoke the callback immediately with the error.
-    handshaker->cb(exec_ctx, handshaker->endpoint, handshaker->args,
-                   handshaker->read_buffer, handshaker->user_data,
-                   GRPC_ERROR_REF(error));
+  gpr_mu_lock(&handshaker->mu);
+  if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
+    // If the write failed or we're shutting down, clean up and invoke the
+    // callback with the error.
+    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
+    gpr_mu_unlock(&handshaker->mu);
+    http_connect_handshaker_unref(exec_ctx, handshaker);
   } else {
     // Otherwise, read the response.
-    grpc_endpoint_read(exec_ctx, handshaker->endpoint, handshaker->read_buffer,
+    // The read callback inherits our ref to the handshaker.
+    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+                       handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
+    gpr_mu_unlock(&handshaker->mu);
   }
 }
 
@@ -112,37 +159,41 @@ static void on_write_done(grpc_exec_ctx* exec_ctx, void* arg,
 static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                          grpc_error* error) {
   http_connect_handshaker* handshaker = arg;
-  if (error != GRPC_ERROR_NONE) {
-    GRPC_ERROR_REF(error);  // Take ref to pass to the handshake-done callback.
+  gpr_mu_lock(&handshaker->mu);
+  if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
+    // If the read failed or we're shutting down, clean up and invoke the
+    // callback with the error.
+    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
     goto done;
   }
   // Add buffer to parser.
-  for (size_t i = 0; i < handshaker->read_buffer->count; ++i) {
-    if (GPR_SLICE_LENGTH(handshaker->read_buffer->slices[i]) > 0) {
+  for (size_t i = 0; i < handshaker->args->read_buffer->count; ++i) {
+    if (GRPC_SLICE_LENGTH(handshaker->args->read_buffer->slices[i]) > 0) {
       size_t body_start_offset = 0;
       error = grpc_http_parser_parse(&handshaker->http_parser,
-                                     handshaker->read_buffer->slices[i],
+                                     handshaker->args->read_buffer->slices[i],
                                      &body_start_offset);
-      if (error != GRPC_ERROR_NONE) goto done;
+      if (error != GRPC_ERROR_NONE) {
+        handshake_failed_locked(exec_ctx, handshaker, error);
+        goto done;
+      }
       if (handshaker->http_parser.state == GRPC_HTTP_BODY) {
-        // We've gotten back a successul response, so stop the timeout timer.
-        grpc_timer_cancel(exec_ctx, &handshaker->timeout_timer);
         // Remove the data we've already read from the read buffer,
         // leaving only the leftover bytes (if any).
-        gpr_slice_buffer tmp_buffer;
-        gpr_slice_buffer_init(&tmp_buffer);
+        grpc_slice_buffer tmp_buffer;
+        grpc_slice_buffer_init(&tmp_buffer);
         if (body_start_offset <
-            GPR_SLICE_LENGTH(handshaker->read_buffer->slices[i])) {
-          gpr_slice_buffer_add(
+            GRPC_SLICE_LENGTH(handshaker->args->read_buffer->slices[i])) {
+          grpc_slice_buffer_add(
               &tmp_buffer,
-              gpr_slice_split_tail(&handshaker->read_buffer->slices[i],
-                                   body_start_offset));
+              grpc_slice_split_tail(&handshaker->args->read_buffer->slices[i],
+                                    body_start_offset));
         }
-        gpr_slice_buffer_addn(&tmp_buffer,
-                              &handshaker->read_buffer->slices[i + 1],
-                              handshaker->read_buffer->count - i - 1);
-        gpr_slice_buffer_swap(handshaker->read_buffer, &tmp_buffer);
-        gpr_slice_buffer_destroy(&tmp_buffer);
+        grpc_slice_buffer_addn(&tmp_buffer,
+                               &handshaker->args->read_buffer->slices[i + 1],
+                               handshaker->args->read_buffer->count - i - 1);
+        grpc_slice_buffer_swap(handshaker->args->read_buffer, &tmp_buffer);
+        grpc_slice_buffer_destroy(&tmp_buffer);
         break;
       }
     }
@@ -159,9 +210,11 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
   // complete (e.g., handling chunked transfer encoding or looking
   // at the Content-Length: header).
   if (handshaker->http_parser.state != GRPC_HTTP_BODY) {
-    gpr_slice_buffer_reset_and_unref(handshaker->read_buffer);
-    grpc_endpoint_read(exec_ctx, handshaker->endpoint, handshaker->read_buffer,
+    grpc_slice_buffer_reset_and_unref(handshaker->args->read_buffer);
+    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+                       handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
+    gpr_mu_unlock(&handshaker->mu);
     return;
   }
   // Make sure we got a 2xx response.
@@ -172,11 +225,17 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                  handshaker->http_response.status);
     error = GRPC_ERROR_CREATE(msg);
     gpr_free(msg);
+    handshake_failed_locked(exec_ctx, handshaker, error);
+    goto done;
   }
+  // Success.  Invoke handshake-done callback.
+  grpc_exec_ctx_sched(exec_ctx, handshaker->on_handshake_done, error, NULL);
 done:
-  // Invoke handshake-done callback.
-  handshaker->cb(exec_ctx, handshaker->endpoint, handshaker->args,
-                 handshaker->read_buffer, handshaker->user_data, error);
+  // Set shutdown to true so that subsequent calls to
+  // http_connect_handshaker_shutdown() do nothing.
+  handshaker->shutdown = true;
+  gpr_mu_unlock(&handshaker->mu);
+  http_connect_handshaker_unref(exec_ctx, handshaker);
 }
 
 //
@@ -186,67 +245,79 @@ done:
 static void http_connect_handshaker_destroy(grpc_exec_ctx* exec_ctx,
                                             grpc_handshaker* handshaker_in) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
-  http_connect_handshaker_unref(handshaker);
+  http_connect_handshaker_unref(exec_ctx, handshaker);
 }
 
 static void http_connect_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                             grpc_handshaker* handshaker) {}
+                                             grpc_handshaker* handshaker_in) {
+  http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
+  gpr_mu_lock(&handshaker->mu);
+  if (!handshaker->shutdown) {
+    handshaker->shutdown = true;
+    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint);
+    cleanup_args_for_failure_locked(handshaker);
+  }
+  gpr_mu_unlock(&handshaker->mu);
+}
 
 static void http_connect_handshaker_do_handshake(
     grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker_in,
-    grpc_endpoint* endpoint, grpc_channel_args* args,
-    gpr_slice_buffer* read_buffer, gpr_timespec deadline,
-    grpc_tcp_server_acceptor* acceptor, grpc_handshaker_done_cb cb,
-    void* user_data) {
+    grpc_tcp_server_acceptor* acceptor, grpc_closure* on_handshake_done,
+    grpc_handshaker_args* args) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
+  // Get server name from channel args.
+  const grpc_arg* arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
+  GPR_ASSERT(arg != NULL);
+  GPR_ASSERT(arg->type == GRPC_ARG_STRING);
+  char* canonical_uri =
+      grpc_resolver_factory_add_default_prefix_if_needed(arg->value.string);
+  grpc_uri* uri = grpc_uri_parse(canonical_uri, 1);
+  char* server_name = uri->path;
+  if (server_name[0] == '/') ++server_name;
   // Save state in the handshaker object.
-  handshaker->endpoint = endpoint;
+  gpr_mu_lock(&handshaker->mu);
   handshaker->args = args;
-  handshaker->cb = cb;
-  handshaker->user_data = user_data;
-  handshaker->read_buffer = read_buffer;
+  handshaker->on_handshake_done = on_handshake_done;
   // Send HTTP CONNECT request.
-  gpr_log(GPR_INFO, "Connecting to server %s via HTTP proxy %s",
-          handshaker->server_name, handshaker->proxy_server);
+  gpr_log(GPR_INFO, "Connecting to server %s via HTTP proxy %s", server_name,
+          handshaker->proxy_server);
   grpc_httpcli_request request;
   memset(&request, 0, sizeof(request));
-  request.host = handshaker->proxy_server;
+  request.host = server_name;
   request.http.method = "CONNECT";
-  request.http.path = handshaker->server_name;
+  request.http.path = server_name;
   request.handshaker = &grpc_httpcli_plaintext;
-  gpr_slice request_slice = grpc_httpcli_format_connect_request(&request);
-  gpr_slice_buffer_add(&handshaker->write_buffer, request_slice);
-  grpc_endpoint_write(exec_ctx, endpoint, &handshaker->write_buffer,
-                      &handshaker->request_done_closure);
-  // Set timeout timer.  The timer gets a reference to the handshaker.
+  grpc_slice request_slice = grpc_httpcli_format_connect_request(&request);
+  grpc_slice_buffer_add(&handshaker->write_buffer, request_slice);
+  // Take a new ref to be held by the write callback.
   gpr_ref(&handshaker->refcount);
-  grpc_timer_init(exec_ctx, &handshaker->timeout_timer,
-                  gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
-                  on_timeout, handshaker, gpr_now(GPR_CLOCK_MONOTONIC));
+  grpc_endpoint_write(exec_ctx, args->endpoint, &handshaker->write_buffer,
+                      &handshaker->request_done_closure);
+  gpr_mu_unlock(&handshaker->mu);
+  // Clean up.
+  gpr_free(canonical_uri);
+  grpc_uri_destroy(uri);
 }
 
-static const struct grpc_handshaker_vtable http_connect_handshaker_vtable = {
+static const grpc_handshaker_vtable http_connect_handshaker_vtable = {
     http_connect_handshaker_destroy, http_connect_handshaker_shutdown,
     http_connect_handshaker_do_handshake};
 
-grpc_handshaker* grpc_http_connect_handshaker_create(const char* proxy_server,
-                                                     const char* server_name) {
+grpc_handshaker* grpc_http_connect_handshaker_create(const char* proxy_server) {
   GPR_ASSERT(proxy_server != NULL);
-  GPR_ASSERT(server_name != NULL);
-  http_connect_handshaker* handshaker =
-      gpr_malloc(sizeof(http_connect_handshaker));
+  http_connect_handshaker* handshaker = gpr_malloc(sizeof(*handshaker));
   memset(handshaker, 0, sizeof(*handshaker));
   grpc_handshaker_init(&http_connect_handshaker_vtable, &handshaker->base);
+  gpr_mu_init(&handshaker->mu);
+  gpr_ref_init(&handshaker->refcount, 1);
   handshaker->proxy_server = gpr_strdup(proxy_server);
-  handshaker->server_name = gpr_strdup(server_name);
-  gpr_slice_buffer_init(&handshaker->write_buffer);
+  grpc_slice_buffer_init(&handshaker->write_buffer);
   grpc_closure_init(&handshaker->request_done_closure, on_write_done,
                     handshaker);
   grpc_closure_init(&handshaker->response_read_closure, on_read_done,
                     handshaker);
   grpc_http_parser_init(&handshaker->http_parser, GRPC_HTTP_RESPONSE,
                         &handshaker->http_response);
-  gpr_ref_init(&handshaker->refcount, 1);
   return &handshaker->base;
 }
 
diff --git a/src/core/ext/client_channel/http_connect_handshaker.h b/src/core/ext/client_channel/http_connect_handshaker.h
index c689df2b2b..ea293852e6 100644
--- a/src/core/ext/client_channel/http_connect_handshaker.h
+++ b/src/core/ext/client_channel/http_connect_handshaker.h
@@ -36,9 +36,8 @@
 
 #include "src/core/lib/channel/handshaker.h"
 
-/// Does NOT take ownership of \a proxy_server or \a server_name.
-grpc_handshaker* grpc_http_connect_handshaker_create(const char* proxy_server,
-                                                     const char* server_name);
+/// Does NOT take ownership of \a proxy_server.
+grpc_handshaker* grpc_http_connect_handshaker_create(const char* proxy_server);
 
 /// Returns the name of the proxy to use, or NULL if no proxy is configured.
 /// Caller takes ownership of result.
diff --git a/src/core/ext/client_channel/initial_connect_string.c b/src/core/ext/client_channel/initial_connect_string.c
index fb1493d77d..8ebd06c458 100644
--- a/src/core/ext/client_channel/initial_connect_string.c
+++ b/src/core/ext/client_channel/initial_connect_string.c
@@ -36,7 +36,7 @@
 #include <stddef.h>
 
 extern void grpc_set_default_initial_connect_string(
-    grpc_resolved_address **addr, gpr_slice *initial_str);
+    grpc_resolved_address **addr, grpc_slice *initial_str);
 
 static grpc_set_initial_connect_string_func g_set_initial_connect_string_func =
     grpc_set_default_initial_connect_string;
@@ -47,6 +47,6 @@ void grpc_test_set_initial_connect_string_function(
 }
 
 void grpc_set_initial_connect_string(grpc_resolved_address **addr,
-                                     gpr_slice *initial_str) {
+                                     grpc_slice *initial_str) {
   g_set_initial_connect_string_func(addr, initial_str);
 }
diff --git a/src/core/ext/client_channel/initial_connect_string.h b/src/core/ext/client_channel/initial_connect_string.h
index 68adb0373c..876abea40e 100644
--- a/src/core/ext/client_channel/initial_connect_string.h
+++ b/src/core/ext/client_channel/initial_connect_string.h
@@ -34,17 +34,17 @@
 #ifndef GRPC_CORE_EXT_CLIENT_CHANNEL_INITIAL_CONNECT_STRING_H
 #define GRPC_CORE_EXT_CLIENT_CHANNEL_INITIAL_CONNECT_STRING_H
 
-#include <grpc/support/slice.h>
-
+#include <grpc/slice.h>
 #include "src/core/lib/iomgr/resolve_address.h"
 
 typedef void (*grpc_set_initial_connect_string_func)(
-    grpc_resolved_address **addr, gpr_slice *initial_str);
+    grpc_resolved_address **addr, grpc_slice *initial_str);
+
 void grpc_test_set_initial_connect_string_function(
     grpc_set_initial_connect_string_func func);
 
 /** Set a string to be sent once connected. Optionally reset addr. */
 void grpc_set_initial_connect_string(grpc_resolved_address **addr,
-                                     gpr_slice *connect_string);
+                                     grpc_slice *connect_string);
 
 #endif /* GRPC_CORE_EXT_CLIENT_CHANNEL_INITIAL_CONNECT_STRING_H */
diff --git a/src/core/ext/client_channel/lb_policy.h b/src/core/ext/client_channel/lb_policy.h
index 54ad779792..120c641edc 100644
--- a/src/core/ext/client_channel/lb_policy.h
+++ b/src/core/ext/client_channel/lb_policy.h
@@ -109,10 +109,16 @@ struct grpc_lb_policy_vtable {
 
 /*#define GRPC_LB_POLICY_REFCOUNT_DEBUG*/
 #ifdef GRPC_LB_POLICY_REFCOUNT_DEBUG
+
+/* Strong references: the policy will shutdown when they reach zero */
 #define GRPC_LB_POLICY_REF(p, r) \
   grpc_lb_policy_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_LB_POLICY_UNREF(exec_ctx, p, r) \
   grpc_lb_policy_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+
+/* Weak references: they don't prevent the shutdown of the LB policy. When no
+ * strong references are left but there are still weak ones, shutdown is called.
+ * Once the weak reference also reaches zero, the LB policy is destroyed. */
 #define GRPC_LB_POLICY_WEAK_REF(p, r) \
   grpc_lb_policy_weak_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, p, r) \
diff --git a/src/core/ext/client_channel/lb_policy_factory.h b/src/core/ext/client_channel/lb_policy_factory.h
index e2b8080a32..79b3dee259 100644
--- a/src/core/ext/client_channel/lb_policy_factory.h
+++ b/src/core/ext/client_channel/lb_policy_factory.h
@@ -40,6 +40,9 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 
+// Channel arg key for grpc_lb_addresses.
+#define GRPC_ARG_LB_ADDRESSES "grpc.lb_addresses"
+
 typedef struct grpc_lb_policy_factory grpc_lb_policy_factory;
 typedef struct grpc_lb_policy_factory_vtable grpc_lb_policy_factory_vtable;
 
diff --git a/src/core/ext/client_channel/lb_policy_registry.c b/src/core/ext/client_channel/lb_policy_registry.c
index f46a721f9d..90c149d947 100644
--- a/src/core/ext/client_channel/lb_policy_registry.c
+++ b/src/core/ext/client_channel/lb_policy_registry.c
@@ -35,6 +35,8 @@
 
 #include <string.h>
 
+#include "src/core/lib/support/string.h"
+
 #define MAX_POLICIES 10
 
 static grpc_lb_policy_factory *g_all_of_the_lb_policies[MAX_POLICIES];
@@ -52,8 +54,8 @@ void grpc_lb_policy_registry_shutdown(void) {
 void grpc_register_lb_policy(grpc_lb_policy_factory *factory) {
   int i;
   for (i = 0; i < g_number_of_lb_policies; i++) {
-    GPR_ASSERT(0 != strcmp(factory->vtable->name,
-                           g_all_of_the_lb_policies[i]->vtable->name));
+    GPR_ASSERT(0 != gpr_stricmp(factory->vtable->name,
+                                g_all_of_the_lb_policies[i]->vtable->name));
   }
   GPR_ASSERT(g_number_of_lb_policies != MAX_POLICIES);
   grpc_lb_policy_factory_ref(factory);
@@ -66,7 +68,7 @@ static grpc_lb_policy_factory *lookup_factory(const char *name) {
   if (name == NULL) return NULL;
 
   for (i = 0; i < g_number_of_lb_policies; i++) {
-    if (0 == strcmp(name, g_all_of_the_lb_policies[i]->vtable->name)) {
+    if (0 == gpr_stricmp(name, g_all_of_the_lb_policies[i]->vtable->name)) {
       return g_all_of_the_lb_policies[i];
     }
   }
diff --git a/src/core/ext/client_channel/resolver_factory.c b/src/core/ext/client_channel/resolver_factory.c
index 7c3d644257..00bbb92dd0 100644
--- a/src/core/ext/client_channel/resolver_factory.c
+++ b/src/core/ext/client_channel/resolver_factory.c
@@ -43,9 +43,10 @@ void grpc_resolver_factory_unref(grpc_resolver_factory* factory) {
 
 /** Create a resolver instance for a name */
 grpc_resolver* grpc_resolver_factory_create_resolver(
-    grpc_resolver_factory* factory, grpc_resolver_args* args) {
+    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
+    grpc_resolver_args* args) {
   if (factory == NULL) return NULL;
-  return factory->vtable->create_resolver(factory, args);
+  return factory->vtable->create_resolver(exec_ctx, factory, args);
 }
 
 char* grpc_resolver_factory_get_default_authority(
diff --git a/src/core/ext/client_channel/resolver_factory.h b/src/core/ext/client_channel/resolver_factory.h
index 4da42e84d2..3792ddca18 100644
--- a/src/core/ext/client_channel/resolver_factory.h
+++ b/src/core/ext/client_channel/resolver_factory.h
@@ -37,6 +37,7 @@
 #include "src/core/ext/client_channel/client_channel_factory.h"
 #include "src/core/ext/client_channel/resolver.h"
 #include "src/core/ext/client_channel/uri_parser.h"
+#include "src/core/lib/iomgr/pollset_set.h"
 
 typedef struct grpc_resolver_factory grpc_resolver_factory;
 typedef struct grpc_resolver_factory_vtable grpc_resolver_factory_vtable;
@@ -48,6 +49,7 @@ struct grpc_resolver_factory {
 typedef struct grpc_resolver_args {
   grpc_uri *uri;
   const grpc_channel_args *args;
+  grpc_pollset_set *pollset_set;
 } grpc_resolver_args;
 
 struct grpc_resolver_factory_vtable {
@@ -55,7 +57,8 @@ struct grpc_resolver_factory_vtable {
   void (*unref)(grpc_resolver_factory *factory);
 
   /** Implementation of grpc_resolver_factory_create_resolver */
-  grpc_resolver *(*create_resolver)(grpc_resolver_factory *factory,
+  grpc_resolver *(*create_resolver)(grpc_exec_ctx *exec_ctx,
+                                    grpc_resolver_factory *factory,
                                     grpc_resolver_args *args);
 
   /** Implementation of grpc_resolver_factory_get_default_authority */
@@ -70,7 +73,8 @@ void grpc_resolver_factory_unref(grpc_resolver_factory *resolver);
 
 /** Create a resolver instance for a name */
 grpc_resolver *grpc_resolver_factory_create_resolver(
-    grpc_resolver_factory *factory, grpc_resolver_args *args);
+    grpc_exec_ctx *exec_ctx, grpc_resolver_factory *factory,
+    grpc_resolver_args *args);
 
 /** Return a (freshly allocated with gpr_malloc) string representing
     the default authority to use for this scheme. */
diff --git a/src/core/ext/client_channel/resolver_registry.c b/src/core/ext/client_channel/resolver_registry.c
index d0f0fc3f33..5110a7cad9 100644
--- a/src/core/ext/client_channel/resolver_registry.c
+++ b/src/core/ext/client_channel/resolver_registry.c
@@ -109,8 +109,8 @@ static grpc_resolver_factory *lookup_factory_by_uri(grpc_uri *uri) {
 }
 
 static grpc_resolver_factory *resolve_factory(const char *target,
-                                              grpc_uri **uri) {
-  char *tmp;
+                                              grpc_uri **uri,
+                                              char **canonical_target) {
   grpc_resolver_factory *factory = NULL;
 
   GPR_ASSERT(uri != NULL);
@@ -118,37 +118,54 @@ static grpc_resolver_factory *resolve_factory(const char *target,
   factory = lookup_factory_by_uri(*uri);
   if (factory == NULL) {
     grpc_uri_destroy(*uri);
-    gpr_asprintf(&tmp, "%s%s", g_default_resolver_prefix, target);
-    *uri = grpc_uri_parse(tmp, 1);
+    gpr_asprintf(canonical_target, "%s%s", g_default_resolver_prefix, target);
+    *uri = grpc_uri_parse(*canonical_target, 1);
     factory = lookup_factory_by_uri(*uri);
     if (factory == NULL) {
       grpc_uri_destroy(grpc_uri_parse(target, 0));
-      grpc_uri_destroy(grpc_uri_parse(tmp, 0));
-      gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target, tmp);
+      grpc_uri_destroy(grpc_uri_parse(*canonical_target, 0));
+      gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target,
+              *canonical_target);
     }
-    gpr_free(tmp);
   }
   return factory;
 }
 
-grpc_resolver *grpc_resolver_create(const char *target,
-                                    const grpc_channel_args *args) {
+grpc_resolver *grpc_resolver_create(grpc_exec_ctx *exec_ctx, const char *target,
+                                    const grpc_channel_args *args,
+                                    grpc_pollset_set *pollset_set) {
   grpc_uri *uri = NULL;
-  grpc_resolver_factory *factory = resolve_factory(target, &uri);
+  char *canonical_target = NULL;
+  grpc_resolver_factory *factory =
+      resolve_factory(target, &uri, &canonical_target);
   grpc_resolver *resolver;
   grpc_resolver_args resolver_args;
   memset(&resolver_args, 0, sizeof(resolver_args));
   resolver_args.uri = uri;
   resolver_args.args = args;
-  resolver = grpc_resolver_factory_create_resolver(factory, &resolver_args);
+  resolver_args.pollset_set = pollset_set;
+  resolver =
+      grpc_resolver_factory_create_resolver(exec_ctx, factory, &resolver_args);
   grpc_uri_destroy(uri);
+  gpr_free(canonical_target);
   return resolver;
 }
 
 char *grpc_get_default_authority(const char *target) {
   grpc_uri *uri = NULL;
-  grpc_resolver_factory *factory = resolve_factory(target, &uri);
+  char *canonical_target = NULL;
+  grpc_resolver_factory *factory =
+      resolve_factory(target, &uri, &canonical_target);
   char *authority = grpc_resolver_factory_get_default_authority(factory, uri);
   grpc_uri_destroy(uri);
+  gpr_free(canonical_target);
   return authority;
 }
+
+char *grpc_resolver_factory_add_default_prefix_if_needed(const char *target) {
+  grpc_uri *uri = NULL;
+  char *canonical_target = NULL;
+  resolve_factory(target, &uri, &canonical_target);
+  grpc_uri_destroy(uri);
+  return canonical_target == NULL ? gpr_strdup(target) : canonical_target;
+}
diff --git a/src/core/ext/client_channel/resolver_registry.h b/src/core/ext/client_channel/resolver_registry.h
index 2a95a669f0..4fb16131db 100644
--- a/src/core/ext/client_channel/resolver_registry.h
+++ b/src/core/ext/client_channel/resolver_registry.h
@@ -35,6 +35,7 @@
 #define GRPC_CORE_EXT_CLIENT_CHANNEL_RESOLVER_REGISTRY_H
 
 #include "src/core/ext/client_channel/resolver_factory.h"
+#include "src/core/lib/iomgr/pollset_set.h"
 
 void grpc_resolver_registry_init();
 void grpc_resolver_registry_shutdown(void);
@@ -60,8 +61,9 @@ void grpc_register_resolver_type(grpc_resolver_factory *factory);
     If a resolver factory was not found, return NULL.
     \a args is a set of channel arguments to be included in the result
     (typically the set of arguments passed in from the client API). */
-grpc_resolver *grpc_resolver_create(const char *target,
-                                    const grpc_channel_args *args);
+grpc_resolver *grpc_resolver_create(grpc_exec_ctx *exec_ctx, const char *target,
+                                    const grpc_channel_args *args,
+                                    grpc_pollset_set *pollset_set);
 
 /** Find a resolver factory given a name and return an (owned-by-the-caller)
  *  reference to it */
@@ -71,4 +73,8 @@ grpc_resolver_factory *grpc_resolver_factory_lookup(const char *name);
     representing the default authority to pass from a client. */
 char *grpc_get_default_authority(const char *target);
 
+/** Returns a newly allocated string containing \a target, adding the
+    default prefix if needed. */
+char *grpc_resolver_factory_add_default_prefix_if_needed(const char *target);
+
 #endif /* GRPC_CORE_EXT_CLIENT_CHANNEL_RESOLVER_REGISTRY_H */
diff --git a/src/core/ext/client_channel/subchannel.c b/src/core/ext/client_channel/subchannel.c
index 789966cb69..f294e69392 100644
--- a/src/core/ext/client_channel/subchannel.c
+++ b/src/core/ext/client_channel/subchannel.c
@@ -100,7 +100,7 @@ struct grpc_subchannel {
   grpc_subchannel_key *key;
 
   /** initial string to send to peer */
-  gpr_slice initial_connect_string;
+  grpc_slice initial_connect_string;
 
   /** set during connection */
   grpc_connect_out_args connecting_result;
@@ -119,9 +119,9 @@ struct grpc_subchannel {
   gpr_mu mu;
 
   /** have we seen a disconnection? */
-  int disconnected;
+  bool disconnected;
   /** are we connecting */
-  int connecting;
+  bool connecting;
   /** connectivity state tracking */
   grpc_connectivity_state_tracker state_tracker;
 
@@ -132,7 +132,9 @@ struct grpc_subchannel {
   /** backoff state */
   gpr_backoff backoff_state;
   /** do we have an active alarm? */
-  int have_alarm;
+  bool have_alarm;
+  /** have we started the backoff loop */
+  bool backoff_begun;
   /** our alarm */
   grpc_timer alarm;
 };
@@ -206,7 +208,7 @@ static void subchannel_destroy(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_free((void *)c->filters);
   grpc_channel_args_destroy(c->args);
   gpr_free(c->addr);
-  gpr_slice_unref(c->initial_connect_string);
+  grpc_slice_unref(c->initial_connect_string);
   grpc_connectivity_state_destroy(exec_ctx, &c->state_tracker);
   grpc_connector_unref(exec_ctx, c->connector);
   grpc_pollset_set_destroy(c->pollset_set);
@@ -264,7 +266,7 @@ static void disconnect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
   grpc_subchannel_index_unregister(exec_ctx, c->key, c);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(!c->disconnected);
-  c->disconnected = 1;
+  c->disconnected = true;
   grpc_connector_shutdown(exec_ctx, c->connector);
   con = GET_CONNECTED_SUBCHANNEL(c, no_barrier);
   if (con != NULL) {
@@ -334,16 +336,18 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
   int initial_backoff_ms =
       GRPC_SUBCHANNEL_INITIAL_CONNECT_BACKOFF_SECONDS * 1000;
   int max_backoff_ms = GRPC_SUBCHANNEL_RECONNECT_MAX_BACKOFF_SECONDS * 1000;
+  int min_backoff_ms = GRPC_SUBCHANNEL_MIN_CONNECT_TIMEOUT_SECONDS * 1000;
   bool fixed_reconnect_backoff = false;
   if (c->args) {
     for (size_t i = 0; i < c->args->num_args; i++) {
       if (0 == strcmp(c->args->args[i].key,
-                      "grpc.testing.fixed_reconnect_backoff")) {
+                      "grpc.testing.fixed_reconnect_backoff_ms")) {
         GPR_ASSERT(c->args->args[i].type == GRPC_ARG_INTEGER);
         fixed_reconnect_backoff = true;
-        initial_backoff_ms = max_backoff_ms = grpc_channel_arg_get_integer(
-            &c->args->args[i],
-            (grpc_integer_options){initial_backoff_ms, 100, INT_MAX});
+        initial_backoff_ms = min_backoff_ms = max_backoff_ms =
+            grpc_channel_arg_get_integer(
+                &c->args->args[i],
+                (grpc_integer_options){initial_backoff_ms, 100, INT_MAX});
       } else if (0 == strcmp(c->args->args[i].key,
                              GRPC_ARG_MAX_RECONNECT_BACKOFF_MS)) {
         fixed_reconnect_backoff = false;
@@ -360,17 +364,18 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
     }
   }
   gpr_backoff_init(
-      &c->backoff_state,
+      &c->backoff_state, initial_backoff_ms,
       fixed_reconnect_backoff ? 1.0
                               : GRPC_SUBCHANNEL_RECONNECT_BACKOFF_MULTIPLIER,
       fixed_reconnect_backoff ? 0.0 : GRPC_SUBCHANNEL_RECONNECT_JITTER,
-      initial_backoff_ms, max_backoff_ms);
+      min_backoff_ms, max_backoff_ms);
   gpr_mu_init(&c->mu);
 
   return grpc_subchannel_index_register(exec_ctx, key, c);
 }
 
-static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
+static void continue_connect_locked(grpc_exec_ctx *exec_ctx,
+                                    grpc_subchannel *c) {
   grpc_connect_in_args args;
 
   args.interested_parties = c->pollset_set;
@@ -386,12 +391,6 @@ static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
                          &c->connected);
 }
 
-static void start_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
-  c->next_attempt =
-      gpr_backoff_begin(&c->backoff_state, gpr_now(GPR_CLOCK_MONOTONIC));
-  continue_connect(exec_ctx, c);
-}
-
 grpc_connectivity_state grpc_subchannel_check_connectivity(grpc_subchannel *c,
                                                            grpc_error **error) {
   grpc_connectivity_state state;
@@ -418,6 +417,73 @@ static void on_external_state_watcher_done(grpc_exec_ctx *exec_ctx, void *arg,
   follow_up->cb(exec_ctx, follow_up->cb_arg, error);
 }
 
+static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
+  grpc_subchannel *c = arg;
+  gpr_mu_lock(&c->mu);
+  c->have_alarm = false;
+  if (c->disconnected) {
+    error = GRPC_ERROR_CREATE_REFERENCING("Disconnected", &error, 1);
+  } else {
+    GRPC_ERROR_REF(error);
+  }
+  if (error == GRPC_ERROR_NONE) {
+    gpr_log(GPR_INFO, "Failed to connect to channel, retrying");
+    c->next_attempt =
+        gpr_backoff_step(&c->backoff_state, gpr_now(GPR_CLOCK_MONOTONIC));
+    continue_connect_locked(exec_ctx, c);
+    gpr_mu_unlock(&c->mu);
+  } else {
+    gpr_mu_unlock(&c->mu);
+    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+  }
+  GRPC_ERROR_UNREF(error);
+}
+
+static void maybe_start_connecting_locked(grpc_exec_ctx *exec_ctx,
+                                          grpc_subchannel *c) {
+  if (c->disconnected) {
+    /* Don't try to connect if we're already disconnected */
+    return;
+  }
+
+  if (c->connecting) {
+    /* Already connecting: don't restart */
+    return;
+  }
+
+  if (GET_CONNECTED_SUBCHANNEL(c, no_barrier) != NULL) {
+    /* Already connected: don't restart */
+    return;
+  }
+
+  if (!grpc_connectivity_state_has_watchers(&c->state_tracker)) {
+    /* Nobody is interested in connecting: so don't just yet */
+    return;
+  }
+
+  c->connecting = true;
+  GRPC_SUBCHANNEL_WEAK_REF(c, "connecting");
+
+  gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+  if (!c->backoff_begun) {
+    c->backoff_begun = true;
+    c->next_attempt = gpr_backoff_begin(&c->backoff_state, now);
+    continue_connect_locked(exec_ctx, c);
+  } else {
+    GPR_ASSERT(!c->have_alarm);
+    c->have_alarm = true;
+    gpr_timespec time_til_next = gpr_time_sub(c->next_attempt, now);
+    if (gpr_time_cmp(time_til_next, gpr_time_0(time_til_next.clock_type)) <=
+        0) {
+      gpr_log(GPR_INFO, "Retry immediately");
+    } else {
+      gpr_log(GPR_INFO, "Retry in %" PRId64 ".%09d seconds",
+              time_til_next.tv_sec, time_til_next.tv_nsec);
+    }
+    grpc_timer_init(exec_ctx, &c->alarm, c->next_attempt, on_alarm, c, now);
+  }
+}
+
 void grpc_subchannel_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_subchannel *c,
     grpc_pollset_set *interested_parties, grpc_connectivity_state *state,
@@ -449,13 +515,9 @@ void grpc_subchannel_notify_on_state_change(
     w->next = &c->root_external_state_watcher;
     w->prev = w->next->prev;
     w->next->prev = w->prev->next = w;
-    if (grpc_connectivity_state_notify_on_state_change(
-            exec_ctx, &c->state_tracker, state, &w->closure)) {
-      c->connecting = 1;
-      /* released by connection */
-      GRPC_SUBCHANNEL_WEAK_REF(c, "connecting");
-      start_connect(exec_ctx, c);
-    }
+    grpc_connectivity_state_notify_on_state_change(exec_ctx, &c->state_tracker,
+                                                   state, &w->closure);
+    maybe_start_connecting_locked(exec_ctx, c);
     gpr_mu_unlock(&c->mu);
   }
 }
@@ -542,14 +604,20 @@ static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
   grpc_channel_stack_builder_set_transport(builder,
                                            c->connecting_result.transport);
 
-  if (grpc_channel_init_create_stack(exec_ctx, builder,
-                                     GRPC_CLIENT_SUBCHANNEL)) {
-    con = grpc_channel_stack_builder_finish(exec_ctx, builder, 0, 1,
-                                            connection_destroy, NULL);
-  } else {
+  if (!grpc_channel_init_create_stack(exec_ctx, builder,
+                                      GRPC_CLIENT_SUBCHANNEL)) {
     grpc_channel_stack_builder_destroy(builder);
     abort(); /* TODO(ctiller): what to do here (previously we just crashed) */
   }
+  grpc_error *error = grpc_channel_stack_builder_finish(
+      exec_ctx, builder, 0, 1, connection_destroy, NULL, (void **)&con);
+  if (error != GRPC_ERROR_NONE) {
+    const char *msg = grpc_error_string(error);
+    gpr_log(GPR_ERROR, "error initializing subchannel stack: %s", msg);
+    grpc_error_free_string(msg);
+    GRPC_ERROR_UNREF(error);
+    abort(); /* TODO(ctiller): what to do here? */
+  }
   stk = CHANNEL_STACK_FROM_CONNECTION(con);
   memset(&c->connecting_result, 0, sizeof(c->connecting_result));
 
@@ -575,12 +643,9 @@ static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
                     Re-evaluate if we really need this. */
   gpr_atm_full_barrier();
   GPR_ASSERT(gpr_atm_rel_cas(&c->connected_subchannel, 0, (gpr_atm)con));
-  c->connecting = 0;
 
   /* setup subchannel watching connected subchannel for changes; subchannel
-     ref
-     for connecting is donated
-     to the state watcher */
+     ref for connecting is donated to the state watcher */
   GRPC_SUBCHANNEL_WEAK_REF(c, "state_watcher");
   GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
   grpc_connected_subchannel_notify_on_state_change(
@@ -592,28 +657,6 @@ static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
                               GRPC_ERROR_NONE, "connected");
 }
 
-static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  grpc_subchannel *c = arg;
-  gpr_mu_lock(&c->mu);
-  c->have_alarm = 0;
-  if (c->disconnected) {
-    error = GRPC_ERROR_CREATE_REFERENCING("Disconnected", &error, 1);
-  } else {
-    GRPC_ERROR_REF(error);
-  }
-  if (error == GRPC_ERROR_NONE) {
-    gpr_log(GPR_INFO, "Failed to connect to channel, retrying");
-    c->next_attempt =
-        gpr_backoff_step(&c->backoff_state, gpr_now(GPR_CLOCK_MONOTONIC));
-    continue_connect(exec_ctx, c);
-    gpr_mu_unlock(&c->mu);
-  } else {
-    gpr_mu_unlock(&c->mu);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
-  }
-  GRPC_ERROR_UNREF(error);
-}
-
 static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
                                  grpc_error *error) {
   grpc_subchannel *c = arg;
@@ -621,35 +664,28 @@ static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
 
   GRPC_SUBCHANNEL_WEAK_REF(c, "connected");
   gpr_mu_lock(&c->mu);
+  c->connecting = false;
   if (c->connecting_result.transport != NULL) {
     publish_transport_locked(exec_ctx, c);
   } else if (c->disconnected) {
     GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
   } else {
-    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
-    GPR_ASSERT(!c->have_alarm);
-    c->have_alarm = 1;
     grpc_connectivity_state_set(
         exec_ctx, &c->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         grpc_error_set_int(
             GRPC_ERROR_CREATE_REFERENCING("Connect Failed", &error, 1),
             GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE),
         "connect_failed");
-    gpr_timespec time_til_next = gpr_time_sub(c->next_attempt, now);
+
     const char *errmsg = grpc_error_string(error);
     gpr_log(GPR_INFO, "Connect failed: %s", errmsg);
-    if (gpr_time_cmp(time_til_next, gpr_time_0(time_til_next.clock_type)) <=
-        0) {
-      gpr_log(GPR_INFO, "Retry immediately");
-    } else {
-      gpr_log(GPR_INFO, "Retry in %" PRId64 ".%09d seconds",
-              time_til_next.tv_sec, time_til_next.tv_nsec);
-    }
-    grpc_timer_init(exec_ctx, &c->alarm, c->next_attempt, on_alarm, c, now);
     grpc_error_free_string(errmsg);
+
+    maybe_start_connecting_locked(exec_ctx, c);
+    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
   }
   gpr_mu_unlock(&c->mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connected");
   grpc_channel_args_destroy(delete_channel_args);
 }
 
@@ -702,15 +738,15 @@ grpc_connected_subchannel *grpc_subchannel_get_connected_subchannel(
 
 grpc_error *grpc_connected_subchannel_create_call(
     grpc_exec_ctx *exec_ctx, grpc_connected_subchannel *con,
-    grpc_polling_entity *pollent, grpc_mdstr *path, gpr_timespec deadline,
-    grpc_subchannel_call **call) {
+    grpc_polling_entity *pollent, grpc_mdstr *path, gpr_timespec start_time,
+    gpr_timespec deadline, grpc_subchannel_call **call) {
   grpc_channel_stack *chanstk = CHANNEL_STACK_FROM_CONNECTION(con);
   *call = gpr_malloc(sizeof(grpc_subchannel_call) + chanstk->call_stack_size);
   grpc_call_stack *callstk = SUBCHANNEL_CALL_TO_CALL_STACK(*call);
   (*call)->connection = con;  // Ref is added below.
   grpc_error *error =
       grpc_call_stack_init(exec_ctx, chanstk, 1, subchannel_call_destroy, *call,
-                           NULL, NULL, path, deadline, callstk);
+                           NULL, NULL, path, start_time, deadline, callstk);
   if (error != GRPC_ERROR_NONE) {
     const char *error_string = grpc_error_string(error);
     gpr_log(GPR_ERROR, "error: %s", error_string);
diff --git a/src/core/ext/client_channel/subchannel.h b/src/core/ext/client_channel/subchannel.h
index 93bd72d20d..24aa9f73dc 100644
--- a/src/core/ext/client_channel/subchannel.h
+++ b/src/core/ext/client_channel/subchannel.h
@@ -111,8 +111,8 @@ void grpc_subchannel_call_unref(grpc_exec_ctx *exec_ctx,
 /** construct a subchannel call */
 grpc_error *grpc_connected_subchannel_create_call(
     grpc_exec_ctx *exec_ctx, grpc_connected_subchannel *connected_subchannel,
-    grpc_polling_entity *pollent, grpc_mdstr *path, gpr_timespec deadline,
-    grpc_subchannel_call **subchannel_call);
+    grpc_polling_entity *pollent, grpc_mdstr *path, gpr_timespec start_time,
+    gpr_timespec deadline, grpc_subchannel_call **subchannel_call);
 
 /** process a transport level op */
 void grpc_connected_subchannel_process_transport_op(
@@ -164,8 +164,6 @@ struct grpc_subchannel_args {
   size_t filter_count;
   /** Channel arguments to be supplied to the newly created channel */
   const grpc_channel_args *args;
-  /** Server name */
-  const char *server_name;
   /** Address to connect to */
   grpc_resolved_address *addr;
 };
diff --git a/src/core/ext/client_channel/subchannel_index.c b/src/core/ext/client_channel/subchannel_index.c
index 227013a7d7..a1ba5e945c 100644
--- a/src/core/ext/client_channel/subchannel_index.c
+++ b/src/core/ext/client_channel/subchannel_index.c
@@ -86,7 +86,6 @@ static grpc_subchannel_key *create_key(
   } else {
     k->args.filters = NULL;
   }
-  k->args.server_name = gpr_strdup(args->server_name);
   k->args.addr = gpr_malloc(sizeof(grpc_resolved_address));
   k->args.addr->len = args->addr->len;
   if (k->args.addr->len > 0) {
@@ -113,8 +112,6 @@ static int subchannel_key_compare(grpc_subchannel_key *a,
   if (c != 0) return c;
   c = GPR_ICMP(a->args.filter_count, b->args.filter_count);
   if (c != 0) return c;
-  c = strcmp(a->args.server_name, b->args.server_name);
-  if (c != 0) return c;
   if (a->args.addr->len) {
     c = memcmp(a->args.addr->addr, b->args.addr->addr, a->args.addr->len);
     if (c != 0) return c;
@@ -132,7 +129,6 @@ void grpc_subchannel_key_destroy(grpc_exec_ctx *exec_ctx,
   grpc_connector_unref(exec_ctx, k->connector);
   gpr_free((grpc_channel_args *)k->args.filters);
   grpc_channel_args_destroy((grpc_channel_args *)k->args.args);
-  gpr_free((void *)k->args.server_name);
   gpr_free(k->args.addr);
   gpr_free(k);
 }
diff --git a/src/core/ext/client_channel/uri_parser.c b/src/core/ext/client_channel/uri_parser.c
index bcb6a1dee4..0fbc542ef8 100644
--- a/src/core/ext/client_channel/uri_parser.c
+++ b/src/core/ext/client_channel/uri_parser.c
@@ -35,13 +35,14 @@
 
 #include <string.h>
 
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 /** a size_t default value... maps to all 1's */
@@ -148,38 +149,38 @@ static void parse_query_parts(grpc_uri *uri) {
     uri->num_query_parts = 0;
     return;
   }
-  gpr_slice query_slice =
-      gpr_slice_new(uri->query, strlen(uri->query), do_nothing);
-  gpr_slice_buffer query_parts; /* the &-separated elements of the query */
-  gpr_slice_buffer query_param_parts; /* the =-separated subelements */
+  grpc_slice query_slice =
+      grpc_slice_new(uri->query, strlen(uri->query), do_nothing);
+  grpc_slice_buffer query_parts; /* the &-separated elements of the query */
+  grpc_slice_buffer query_param_parts; /* the =-separated subelements */
 
-  gpr_slice_buffer_init(&query_parts);
-  gpr_slice_buffer_init(&query_param_parts);
+  grpc_slice_buffer_init(&query_parts);
+  grpc_slice_buffer_init(&query_param_parts);
 
-  gpr_slice_split(query_slice, QUERY_PARTS_SEPARATOR, &query_parts);
+  grpc_slice_split(query_slice, QUERY_PARTS_SEPARATOR, &query_parts);
   uri->query_parts = gpr_malloc(query_parts.count * sizeof(char *));
   uri->query_parts_values = gpr_malloc(query_parts.count * sizeof(char *));
   uri->num_query_parts = query_parts.count;
   for (size_t i = 0; i < query_parts.count; i++) {
-    gpr_slice_split(query_parts.slices[i], QUERY_PARTS_VALUE_SEPARATOR,
-                    &query_param_parts);
+    grpc_slice_split(query_parts.slices[i], QUERY_PARTS_VALUE_SEPARATOR,
+                     &query_param_parts);
     GPR_ASSERT(query_param_parts.count > 0);
     uri->query_parts[i] =
-        gpr_dump_slice(query_param_parts.slices[0], GPR_DUMP_ASCII);
+        grpc_dump_slice(query_param_parts.slices[0], GPR_DUMP_ASCII);
     if (query_param_parts.count > 1) {
       /* TODO(dgq): only the first value after the separator is considered.
        * Perhaps all chars after the first separator for the query part should
        * be included, even if they include the separator. */
       uri->query_parts_values[i] =
-          gpr_dump_slice(query_param_parts.slices[1], GPR_DUMP_ASCII);
+          grpc_dump_slice(query_param_parts.slices[1], GPR_DUMP_ASCII);
     } else {
       uri->query_parts_values[i] = NULL;
     }
-    gpr_slice_buffer_reset_and_unref(&query_param_parts);
+    grpc_slice_buffer_reset_and_unref(&query_param_parts);
   }
-  gpr_slice_buffer_destroy(&query_parts);
-  gpr_slice_buffer_destroy(&query_param_parts);
-  gpr_slice_unref(query_slice);
+  grpc_slice_buffer_destroy(&query_parts);
+  grpc_slice_buffer_destroy(&query_param_parts);
+  grpc_slice_unref(query_slice);
 }
 
 grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors) {
diff --git a/src/core/ext/lb_policy/grpclb/grpclb.c b/src/core/ext/lb_policy/grpclb/grpclb.c
index 6da4febf26..bed5e6c901 100644
--- a/src/core/ext/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/lb_policy/grpclb/grpclb.c
@@ -43,30 +43,23 @@
  * policy to select from this list of LB server backends.
  *
  * The first time the policy gets a request for a pick, a ping, or to exit the
- * idle state, \a query_for_backends() is called. It creates an instance of \a
- * lb_client_data, an internal struct meant to contain the data associated with
- * the internal communication with the LB server. This instance is created via
- * \a lb_client_data_create(). There, the call over lb_channel to pick-first
- * from {a1..an} is created, the \a LoadBalancingRequest message is assembled
- * and all necessary callbacks for the progress of the internal call configured.
+ * idle state, \a query_for_backends_locked() is called. This function sets up
+ * and initiates the internal communication with the LB server. In particular,
+ * it's responsible for instantiating the internal *streaming* call to the LB
+ * server (whichever address from {a1..an} pick-first chose). This call is
+ * serviced by two callbacks, \a lb_on_server_status_received and \a
+ * lb_on_response_received. The former will be called when the call to the LB
+ * server completes. This can happen if the LB server closes the connection or
+ * if this policy itself cancels the call (for example because it's shutting
+ * down). If the internal call times out, the usual behavior of pick-first
+ * applies, continuing to pick from the list {a1..an}.
  *
- * Back in \a query_for_backends(), the internal *streaming* call to the LB
- * server (whichever address from {a1..an} pick-first chose) is kicked off.
- * It'll progress over the callbacks configured in \a lb_client_data_create()
- * (see the field docstrings of \a lb_client_data for more details).
- *
- * If the call fails with UNIMPLEMENTED, the original call will also fail.
- * There's a misconfiguration somewhere: at least one of {a1..an} isn't a LB
- * server, which contradicts the LB bit being set. If the internal call times
- * out, the usual behavior of pick-first applies, continuing to pick from the
- * list {a1..an}.
- *
- * Upon sucesss, a \a LoadBalancingResponse is expected in \a res_recv_cb. An
- * invalid one results in the termination of the streaming call. A new streaming
- * call should be created if possible, failing the original call otherwise.
- * For a valid \a LoadBalancingResponse, the server list of actual backends is
- * extracted. A Round Robin policy will be created from this list. There are two
- * possible scenarios:
+ * Upon sucesss, the incoming \a LoadBalancingResponse is processed by \a
+ * res_recv. An invalid one results in the termination of the streaming call. A
+ * new streaming call should be created if possible, failing the original call
+ * otherwise. For a valid \a LoadBalancingResponse, the server list of actual
+ * backends is extracted. A Round Robin policy will be created from this list.
+ * There are two possible scenarios:
  *
  * 1. This is the first server list received. There was no previous instance of
  *    the Round Robin policy. \a rr_handover_locked() will instantiate the RR
@@ -84,10 +77,10 @@
  * Once a RR policy instance is in place (and getting updated as described),
  * calls to for a pick, a ping or a cancellation will be serviced right away by
  * forwarding them to the RR instance. Any time there's no RR policy available
- * (ie, right after the creation of the gRPCLB policy, if an empty serverlist
- * is received, etc), pick/ping requests are added to a list of pending
- * picks/pings to be flushed and serviced as part of \a rr_handover_locked() the
- * moment the RR policy instance becomes available.
+ * (ie, right after the creation of the gRPCLB policy, if an empty serverlist is
+ * received, etc), pick/ping requests are added to a list of pending picks/pings
+ * to be flushed and serviced as part of \a rr_handover_locked() the moment the
+ * RR policy instance becomes available.
  *
  * \see https://github.com/grpc/grpc/blob/master/doc/load-balancing.md for the
  * high level design and details. */
@@ -113,6 +106,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 
+#include "src/core/ext/client_channel/client_channel.h"
 #include "src/core/ext/client_channel/client_channel_factory.h"
 #include "src/core/ext/client_channel/lb_policy_factory.h"
 #include "src/core/ext/client_channel/lb_policy_registry.h"
@@ -120,12 +114,22 @@
 #include "src/core/ext/lb_policy/grpclb/grpclb.h"
 #include "src/core/ext/lb_policy/grpclb/load_balancer_api.h"
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
+#include "src/core/lib/support/backoff.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/channel.h"
 #include "src/core/lib/transport/static_metadata.h"
 
+#define GRPC_GRPCLB_MIN_CONNECT_TIMEOUT_SECONDS 20
+#define GRPC_GRPCLB_INITIAL_CONNECT_BACKOFF_SECONDS 1
+#define GRPC_GRPCLB_RECONNECT_BACKOFF_MULTIPLIER 1.6
+#define GRPC_GRPCLB_RECONNECT_MAX_BACKOFF_SECONDS 120
+#define GRPC_GRPCLB_RECONNECT_JITTER 0.2
+
 int grpc_lb_glb_trace = 0;
 
 /* add lb_token of selected subchannel (address) to the call's initial
@@ -174,25 +178,33 @@ typedef struct wrapped_rr_closure_arg {
 static void wrapped_rr_closure(grpc_exec_ctx *exec_ctx, void *arg,
                                grpc_error *error) {
   wrapped_rr_closure_arg *wc_arg = arg;
-  if (wc_arg->rr_policy != NULL) {
-    if (grpc_lb_glb_trace) {
-      gpr_log(GPR_INFO, "Unreffing RR (0x%" PRIxPTR ")",
-              (intptr_t)wc_arg->rr_policy);
-    }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "wrapped_rr_closure");
 
-    /* if target is NULL, no pick has been made by the RR policy (eg, all
+  GPR_ASSERT(wc_arg->wrapped_closure != NULL);
+  grpc_exec_ctx_sched(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_REF(error),
+                      NULL);
+
+  if (wc_arg->rr_policy != NULL) {
+    /* if *target is NULL, no pick has been made by the RR policy (eg, all
      * addresses failed to connect). There won't be any user_data/token
      * available */
-    if (wc_arg->target != NULL) {
-      initial_metadata_add_lb_token(wc_arg->initial_metadata,
-                                    wc_arg->lb_token_mdelem_storage,
-                                    GRPC_MDELEM_REF(wc_arg->lb_token));
+    if (*wc_arg->target != NULL) {
+      if (wc_arg->lb_token != NULL) {
+        initial_metadata_add_lb_token(wc_arg->initial_metadata,
+                                      wc_arg->lb_token_mdelem_storage,
+                                      GRPC_MDELEM_REF(wc_arg->lb_token));
+      } else {
+        gpr_log(GPR_ERROR,
+                "No LB token for connected subchannel pick %p (from RR "
+                "instance %p).",
+                (void *)*wc_arg->target, (void *)wc_arg->rr_policy);
+        abort();
+      }
     }
+    if (grpc_lb_glb_trace) {
+      gpr_log(GPR_INFO, "Unreffing RR %p", (void *)wc_arg->rr_policy);
+    }
+    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "wrapped_rr_closure");
   }
-  GPR_ASSERT(wc_arg->wrapped_closure != NULL);
-  grpc_exec_ctx_sched(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_REF(error),
-                      NULL);
   GPR_ASSERT(wc_arg->free_when_done != NULL);
   gpr_free(wc_arg->free_when_done);
 }
@@ -264,7 +276,6 @@ static void add_pending_ping(pending_ping **root, grpc_closure *notify) {
  * glb_lb_policy
  */
 typedef struct rr_connectivity_data rr_connectivity_data;
-struct lb_client_data;
 static const grpc_lb_policy_vtable glb_lb_policy_vtable;
 typedef struct glb_lb_policy {
   /** base policy: must be first */
@@ -296,20 +307,47 @@ typedef struct glb_lb_policy {
    * response has arrived. */
   grpc_grpclb_serverlist *serverlist;
 
-  /** addresses from \a serverlist */
-  grpc_lb_addresses *addresses;
-
   /** list of picks that are waiting on RR's policy connectivity */
   pending_pick *pending_picks;
 
   /** list of pings that are waiting on RR's policy connectivity */
   pending_ping *pending_pings;
 
-  /** client data associated with the LB server communication */
-  struct lb_client_data *lb_client;
+  bool shutting_down;
+
+  /************************************************************/
+  /*  client data associated with the LB server communication */
+  /************************************************************/
+  /* Status from the LB server has been received. This signals the end of the LB
+   * call. */
+  grpc_closure lb_on_server_status_received;
+
+  /* A response from the LB server has been received. Process it */
+  grpc_closure lb_on_response_received;
+
+  grpc_call *lb_call; /* streaming call to the LB server, */
+
+  grpc_metadata_array lb_initial_metadata_recv; /* initial MD from LB server */
+  grpc_metadata_array
+      lb_trailing_metadata_recv; /* trailing MD from LB server */
 
-  /** for tracking of the RR connectivity */
-  rr_connectivity_data *rr_connectivity;
+  /* what's being sent to the LB server. Note that its value may vary if the LB
+   * server indicates a redirect. */
+  grpc_byte_buffer *lb_request_payload;
+
+  /* response the LB server, if any. Processed in lb_on_response_received() */
+  grpc_byte_buffer *lb_response_payload;
+
+  /* call status code and details, set in lb_on_server_status_received() */
+  grpc_status_code lb_call_status;
+  char *lb_call_status_details;
+  size_t lb_call_status_details_capacity;
+
+  /** LB call retry backoff state */
+  gpr_backoff lb_call_backoff_state;
+
+  /** LB call retry timer */
+  grpc_timer lb_call_retry_timer;
 } glb_lb_policy;
 
 /* Keeps track and reacts to changes in connectivity of the RR instance */
@@ -358,8 +396,30 @@ static int lb_token_cmp(void *token1, void *token2) {
 static const grpc_lb_user_data_vtable lb_token_vtable = {
     lb_token_copy, lb_token_destroy, lb_token_cmp};
 
+static void parse_server(const grpc_grpclb_server *server,
+                         grpc_resolved_address *addr) {
+  const uint16_t netorder_port = htons((uint16_t)server->port);
+  /* the addresses are given in binary format (a in(6)_addr struct) in
+   * server->ip_address.bytes. */
+  const grpc_grpclb_ip_address *ip = &server->ip_address;
+  memset(addr, 0, sizeof(*addr));
+  if (ip->size == 4) {
+    addr->len = sizeof(struct sockaddr_in);
+    struct sockaddr_in *addr4 = (struct sockaddr_in *)&addr->addr;
+    addr4->sin_family = AF_INET;
+    memcpy(&addr4->sin_addr, ip->bytes, ip->size);
+    addr4->sin_port = netorder_port;
+  } else if (ip->size == 16) {
+    addr->len = sizeof(struct sockaddr_in6);
+    struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&addr->addr;
+    addr6->sin6_family = AF_INET6;
+    memcpy(&addr6->sin6_addr, ip->bytes, ip->size);
+    addr6->sin6_port = netorder_port;
+  }
+}
+
 /* Returns addresses extracted from \a serverlist. */
-static grpc_lb_addresses *process_serverlist(
+static grpc_lb_addresses *process_serverlist_locked(
     const grpc_grpclb_serverlist *serverlist) {
   size_t num_valid = 0;
   /* first pass: count how many are valid in order to allocate the necessary
@@ -384,40 +444,27 @@ static grpc_lb_addresses *process_serverlist(
     if (!is_server_valid(serverlist->servers[sl_idx], sl_idx, false)) continue;
 
     /* address processing */
-    const uint16_t netorder_port = htons((uint16_t)server->port);
-    /* the addresses are given in binary format (a in(6)_addr struct) in
-     * server->ip_address.bytes. */
-    const grpc_grpclb_ip_address *ip = &server->ip_address;
     grpc_resolved_address addr;
-    memset(&addr, 0, sizeof(addr));
-    if (ip->size == 4) {
-      addr.len = sizeof(struct sockaddr_in);
-      struct sockaddr_in *addr4 = (struct sockaddr_in *)&addr.addr;
-      addr4->sin_family = AF_INET;
-      memcpy(&addr4->sin_addr, ip->bytes, ip->size);
-      addr4->sin_port = netorder_port;
-    } else if (ip->size == 16) {
-      addr.len = sizeof(struct sockaddr_in6);
-      struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&addr.addr;
-      addr6->sin6_family = AF_INET;
-      memcpy(&addr6->sin6_addr, ip->bytes, ip->size);
-      addr6->sin6_port = netorder_port;
-    }
+    parse_server(server, &addr);
 
     /* lb token processing */
     void *user_data;
     if (server->has_load_balance_token) {
-      const size_t lb_token_size =
-          GPR_ARRAY_SIZE(server->load_balance_token) - 1;
+      const size_t lb_token_max_length =
+          GPR_ARRAY_SIZE(server->load_balance_token);
+      const size_t lb_token_length =
+          strnlen(server->load_balance_token, lb_token_max_length);
       grpc_mdstr *lb_token_mdstr = grpc_mdstr_from_buffer(
-          (uint8_t *)server->load_balance_token, lb_token_size);
+          (uint8_t *)server->load_balance_token, lb_token_length);
       user_data = grpc_mdelem_from_metadata_strings(GRPC_MDSTR_LB_TOKEN,
                                                     lb_token_mdstr);
     } else {
-      gpr_log(GPR_ERROR,
+      char *uri = grpc_sockaddr_to_uri(&addr);
+      gpr_log(GPR_INFO,
               "Missing LB token for backend address '%s'. The empty token will "
               "be used instead",
-              grpc_sockaddr_to_uri(&addr));
+              uri);
+      gpr_free(uri);
       user_data = GRPC_MDELEM_LB_TOKEN_EMPTY;
     }
 
@@ -427,10 +474,71 @@ static grpc_lb_addresses *process_serverlist(
     ++addr_idx;
   }
   GPR_ASSERT(addr_idx == num_valid);
-
   return lb_addresses;
 }
 
+/* returns true if the new RR policy should replace the current one, if any */
+static bool update_lb_connectivity_status_locked(
+    grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
+    grpc_connectivity_state new_rr_state, grpc_error *new_rr_state_error) {
+  grpc_error *curr_state_error;
+  const grpc_connectivity_state curr_glb_state = grpc_connectivity_state_check(
+      &glb_policy->state_tracker, &curr_state_error);
+
+  /* The new connectivity status is a function of the previous one and the new
+   * input coming from the status of the RR policy.
+   *
+   *  current state (grpclb's)
+   *  |
+   *  v  || I  |  C  |  R  |  TF  |  SD  |  <- new state (RR's)
+   *  ===++====+=====+=====+======+======+
+   *   I || I  |  C  |  R  | [I]  | [I]  |
+   *  ---++----+-----+-----+------+------+
+   *   C || I  |  C  |  R  | [C]  | [C]  |
+   *  ---++----+-----+-----+------+------+
+   *   R || I  |  C  |  R  | [R]  | [R]  |
+   *  ---++----+-----+-----+------+------+
+   *  TF || I  |  C  |  R  | [TF] | [TF] |
+   *  ---++----+-----+-----+------+------+
+   *  SD || NA |  NA |  NA |  NA  |  NA  | (*)
+   *  ---++----+-----+-----+------+------+
+   *
+   * A [STATE] indicates that the old RR policy is kept. In those cases, STATE
+   * is the current state of grpclb, which is left untouched.
+   *
+   *  In summary, if the new state is TRANSIENT_FAILURE or SHUTDOWN, stick to
+   *  the previous RR instance.
+   *
+   *  Note that the status is never updated to SHUTDOWN as a result of calling
+   *  this function. Only glb_shutdown() has the power to set that state.
+   *
+   *  (*) This function mustn't be called during shutting down. */
+  GPR_ASSERT(curr_glb_state != GRPC_CHANNEL_SHUTDOWN);
+
+  switch (new_rr_state) {
+    case GRPC_CHANNEL_TRANSIENT_FAILURE:
+    case GRPC_CHANNEL_SHUTDOWN:
+      GPR_ASSERT(new_rr_state_error != GRPC_ERROR_NONE);
+      return false; /* don't replace the RR policy */
+    case GRPC_CHANNEL_INIT:
+    case GRPC_CHANNEL_IDLE:
+    case GRPC_CHANNEL_CONNECTING:
+    case GRPC_CHANNEL_READY:
+      GPR_ASSERT(new_rr_state_error == GRPC_ERROR_NONE);
+  }
+
+  if (grpc_lb_glb_trace) {
+    gpr_log(GPR_INFO,
+            "Setting grpclb's state to %s from new RR policy %p state.",
+            grpc_connectivity_state_name(new_rr_state),
+            (void *)glb_policy->rr_policy);
+  }
+  grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
+                              new_rr_state, GRPC_ERROR_REF(new_rr_state_error),
+                              "update_lb_connectivity_status_locked");
+  return true;
+}
+
 /* perform a pick over \a rr_policy. Given that a pick can return immediately
  * (ignoring its completion callback) we need to perform the cleanups this
  * callback would be otherwise resposible for */
@@ -448,7 +556,7 @@ static bool pick_from_internal_rr_locked(
       gpr_log(GPR_INFO, "Unreffing RR (0x%" PRIxPTR ")",
               (intptr_t)wc_arg->rr_policy);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick");
+    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
 
     /* add the load reporting initial metadata */
     initial_metadata_add_lb_token(pick_args->initial_metadata,
@@ -461,7 +569,6 @@ static bool pick_from_internal_rr_locked(
    * pending pick list inside the RR policy (glb_policy->rr_policy).
    * Eventually, wrapped_on_complete will be called, which will -among other
    * things- add the LB token to the call's initial metadata */
-
   return pick_done;
 }
 
@@ -470,57 +577,108 @@ static grpc_lb_policy *create_rr_locked(
     glb_lb_policy *glb_policy) {
   GPR_ASSERT(serverlist != NULL && serverlist->num_servers > 0);
 
-  if (glb_policy->addresses != NULL) {
-    /* dispose of the previous version */
-    grpc_lb_addresses_destroy(glb_policy->addresses);
-  }
-  glb_policy->addresses = process_serverlist(serverlist);
-
   grpc_lb_policy_args args;
   memset(&args, 0, sizeof(args));
   args.client_channel_factory = glb_policy->cc_factory;
+  grpc_lb_addresses *addresses = process_serverlist_locked(serverlist);
 
   // Replace the LB addresses in the channel args that we pass down to
   // the subchannel.
   static const char *keys_to_remove[] = {GRPC_ARG_LB_ADDRESSES};
-  const grpc_arg arg =
-      grpc_lb_addresses_create_channel_arg(glb_policy->addresses);
+  const grpc_arg arg = grpc_lb_addresses_create_channel_arg(addresses);
   args.args = grpc_channel_args_copy_and_add_and_remove(
       glb_policy->args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), &arg,
       1);
 
   grpc_lb_policy *rr = grpc_lb_policy_create(exec_ctx, "round_robin", &args);
+  GPR_ASSERT(rr != NULL);
+  grpc_lb_addresses_destroy(addresses);
   grpc_channel_args_destroy(args.args);
-
   return rr;
 }
 
+static void glb_rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
+                                        grpc_error *error);
+/* glb_policy->rr_policy may be NULL (initial handover) */
 static void rr_handover_locked(grpc_exec_ctx *exec_ctx,
-                               glb_lb_policy *glb_policy, grpc_error *error) {
+                               glb_lb_policy *glb_policy) {
   GPR_ASSERT(glb_policy->serverlist != NULL &&
              glb_policy->serverlist->num_servers > 0);
-  glb_policy->rr_policy =
+
+  if (glb_policy->shutting_down) return;
+
+  grpc_lb_policy *new_rr_policy =
       create_rr_locked(exec_ctx, glb_policy->serverlist, glb_policy);
+  if (new_rr_policy == NULL) {
+    gpr_log(GPR_ERROR,
+            "Failure creating a RoundRobin policy for serverlist update with "
+            "%lu entries. The previous RR instance (%p), if any, will continue "
+            "to be used. Future updates from the LB will attempt to create new "
+            "instances.",
+            (unsigned long)glb_policy->serverlist->num_servers,
+            (void *)glb_policy->rr_policy);
+    return;
+  }
+
+  grpc_error *new_rr_state_error = NULL;
+  const grpc_connectivity_state new_rr_state =
+      grpc_lb_policy_check_connectivity(exec_ctx, new_rr_policy,
+                                        &new_rr_state_error);
+  /* Connectivity state is a function of the new RR policy just created */
+  const bool replace_old_rr = update_lb_connectivity_status_locked(
+      exec_ctx, glb_policy, new_rr_state, new_rr_state_error);
+
+  if (!replace_old_rr) {
+    /* dispose of the new RR policy that won't be used after all */
+    GRPC_LB_POLICY_UNREF(exec_ctx, new_rr_policy, "rr_handover_no_replace");
+    if (grpc_lb_glb_trace) {
+      gpr_log(GPR_INFO,
+              "Keeping old RR policy (%p) despite new serverlist: new RR "
+              "policy was in %s connectivity state.",
+              (void *)glb_policy->rr_policy,
+              grpc_connectivity_state_name(new_rr_state));
+    }
+    return;
+  }
 
   if (grpc_lb_glb_trace) {
-    gpr_log(GPR_INFO, "Created RR policy (0x%" PRIxPTR ")",
-            (intptr_t)glb_policy->rr_policy);
+    gpr_log(GPR_INFO, "Created RR policy (%p) to replace old RR (%p)",
+            (void *)new_rr_policy, (void *)glb_policy->rr_policy);
   }
-  GPR_ASSERT(glb_policy->rr_policy != NULL);
+
+  if (glb_policy->rr_policy != NULL) {
+    /* if we are phasing out an existing RR instance, unref it. */
+    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy, "rr_handover");
+  }
+
+  /* Finally update the RR policy to the newly created one */
+  glb_policy->rr_policy = new_rr_policy;
+
+  /* Add the gRPC LB's interested_parties pollset_set to that of the newly
+   * created RR policy. This will make the RR policy progress upon activity on
+   * gRPC LB, which in turn is tied to the application's call */
   grpc_pollset_set_add_pollset_set(exec_ctx,
                                    glb_policy->rr_policy->interested_parties,
                                    glb_policy->base.interested_parties);
-  glb_policy->rr_connectivity->state = grpc_lb_policy_check_connectivity(
-      exec_ctx, glb_policy->rr_policy, &error);
-  grpc_lb_policy_notify_on_state_change(
-      exec_ctx, glb_policy->rr_policy, &glb_policy->rr_connectivity->state,
-      &glb_policy->rr_connectivity->on_change);
-  grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
-                              glb_policy->rr_connectivity->state,
-                              GRPC_ERROR_REF(error), "rr_handover");
+
+  /* Allocate the data for the tracking of the new RR policy's connectivity.
+   * It'll be deallocated in glb_rr_connectivity_changed() */
+  rr_connectivity_data *rr_connectivity =
+      gpr_malloc(sizeof(rr_connectivity_data));
+  memset(rr_connectivity, 0, sizeof(rr_connectivity_data));
+  grpc_closure_init(&rr_connectivity->on_change, glb_rr_connectivity_changed,
+                    rr_connectivity);
+  rr_connectivity->glb_policy = glb_policy;
+  rr_connectivity->state = new_rr_state;
+
+  /* Subscribe to changes to the connectivity of the new RR */
+  GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "rr_connectivity_cb");
+  grpc_lb_policy_notify_on_state_change(exec_ctx, glb_policy->rr_policy,
+                                        &rr_connectivity->state,
+                                        &rr_connectivity->on_change);
   grpc_lb_policy_exit_idle(exec_ctx, glb_policy->rr_policy);
 
-  /* flush pending ops */
+  /* Update picks and pings in wait */
   pending_pick *pp;
   while ((pp = glb_policy->pending_picks)) {
     glb_policy->pending_picks = pp->next;
@@ -551,47 +709,41 @@ static void rr_handover_locked(grpc_exec_ctx *exec_ctx,
 
 static void glb_rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                         grpc_error *error) {
-  rr_connectivity_data *rr_conn_data = arg;
-  glb_lb_policy *glb_policy = rr_conn_data->glb_policy;
-
-  if (rr_conn_data->state == GRPC_CHANNEL_SHUTDOWN) {
-    if (glb_policy->serverlist != NULL) {
-      /* a RR policy is shutting down but there's a serverlist available ->
-       * perform a handover */
-      gpr_mu_lock(&glb_policy->mu);
-      rr_handover_locked(exec_ctx, glb_policy, error);
-      gpr_mu_unlock(&glb_policy->mu);
-    } else {
-      /* shutting down and no new serverlist available. Bail out. */
-      gpr_free(rr_conn_data);
-    }
-  } else {
-    if (error == GRPC_ERROR_NONE) {
-      gpr_mu_lock(&glb_policy->mu);
-      /* RR not shutting down. Mimic the RR's policy state */
-      grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
-                                  rr_conn_data->state, GRPC_ERROR_REF(error),
-                                  "glb_rr_connectivity_changed");
-      /* resubscribe */
-      grpc_lb_policy_notify_on_state_change(exec_ctx, glb_policy->rr_policy,
-                                            &rr_conn_data->state,
-                                            &rr_conn_data->on_change);
-      gpr_mu_unlock(&glb_policy->mu);
-    } else { /* error */
-      gpr_free(rr_conn_data);
-    }
+  rr_connectivity_data *rr_connectivity = arg;
+  glb_lb_policy *glb_policy = rr_connectivity->glb_policy;
+
+  gpr_mu_lock(&glb_policy->mu);
+  const bool shutting_down = glb_policy->shutting_down;
+  bool unref_needed = false;
+  GRPC_ERROR_REF(error);
+
+  if (rr_connectivity->state == GRPC_CHANNEL_SHUTDOWN || shutting_down) {
+    /* RR policy shutting down. Don't renew subscription and free the arg of
+     * this callback. In addition  we need to stash away the current policy to
+     * be UNREF'd after releasing the lock. Otherwise, if the UNREF is the last
+     * one, the policy would be destroyed, alongside the lock, which would
+     * result in a use-after-free */
+    unref_needed = true;
+    gpr_free(rr_connectivity);
+  } else { /* rr state != SHUTDOWN && !shutting down: biz as usual */
+    update_lb_connectivity_status_locked(exec_ctx, glb_policy,
+                                         rr_connectivity->state, error);
+    /* Resubscribe. Reuse the "rr_connectivity_cb" weak ref. */
+    grpc_lb_policy_notify_on_state_change(exec_ctx, glb_policy->rr_policy,
+                                          &rr_connectivity->state,
+                                          &rr_connectivity->on_change);
   }
+  gpr_mu_unlock(&glb_policy->mu);
+  if (unref_needed) {
+    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+                              "rr_connectivity_cb");
+  }
+  GRPC_ERROR_UNREF(error);
 }
 
 static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
                                   grpc_lb_policy_factory *factory,
                                   grpc_lb_policy_args *args) {
-  /* Get server name. */
-  const grpc_arg *arg =
-      grpc_channel_args_find(args->args, GRPC_ARG_SERVER_NAME);
-  const char *server_name =
-      arg != NULL && arg->type == GRPC_ARG_STRING ? arg->value.string : NULL;
-
   /* Count the number of gRPC-LB addresses. There must be at least one.
    * TODO(roth): For now, we ignore non-balancer addresses, but in the
    * future, we may change the behavior such that we fall back to using
@@ -599,7 +751,8 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
    * time, this should be changed to allow a list with no balancer addresses,
    * since the resolver might fail to return a balancer address even when
    * this is the right LB policy to use. */
-  arg = grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
+  const grpc_arg *arg =
+      grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   GPR_ASSERT(arg != NULL && arg->type == GRPC_ARG_POINTER);
   grpc_lb_addresses *addresses = arg->value.pointer.p;
   size_t num_grpclb_addrs = 0;
@@ -611,13 +764,25 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
   glb_lb_policy *glb_policy = gpr_malloc(sizeof(*glb_policy));
   memset(glb_policy, 0, sizeof(*glb_policy));
 
+  /* Get server name. */
+  arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
+  GPR_ASSERT(arg != NULL);
+  GPR_ASSERT(arg->type == GRPC_ARG_STRING);
+  grpc_uri *uri = grpc_uri_parse(arg->value.string, true);
+  GPR_ASSERT(uri->path[0] != '\0');
+  glb_policy->server_name =
+      gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
+  if (grpc_lb_glb_trace) {
+    gpr_log(GPR_INFO, "Will use '%s' as the server name for LB request.",
+            glb_policy->server_name);
+  }
+  grpc_uri_destroy(uri);
+
   /* All input addresses in addresses come from a resolver that claims
    * they are LB services. It's the resolver's responsibility to make sure
-   * this
-   * policy is only instantiated and used in that case.
+   * this policy is only instantiated and used in that case.
    *
    * Create a client channel over them to communicate with a LB service */
-  glb_policy->server_name = gpr_strdup(server_name);
   glb_policy->cc_factory = args->client_channel_factory;
   glb_policy->args = grpc_channel_args_copy(args->args);
   GPR_ASSERT(glb_policy->cc_factory != NULL);
@@ -661,9 +826,14 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
    * We need the LB channel to return addresses with is_balancer=false
    * so that it does not wind up recursively using the grpclb LB policy,
    * as per the special case logic in client_channel.c.
+   *
+   * Finally, we also strip out the channel arg for the server URI,
+   * since that will be different for the LB channel than for the parent
+   * channel.  (The client channel factory will re-add this arg with
+   * the right value.)
    */
-  static const char *keys_to_remove[] = {GRPC_ARG_LB_POLICY_NAME,
-                                         GRPC_ARG_LB_ADDRESSES};
+  static const char *keys_to_remove[] = {
+      GRPC_ARG_LB_POLICY_NAME, GRPC_ARG_LB_ADDRESSES, GRPC_ARG_SERVER_URI};
   grpc_channel_args *new_args = grpc_channel_args_copy_and_remove(
       args->args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove));
   glb_policy->lb_channel = grpc_client_channel_factory_create_channel(
@@ -682,18 +852,11 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
     return NULL;
   }
 
-  rr_connectivity_data *rr_connectivity =
-      gpr_malloc(sizeof(rr_connectivity_data));
-  memset(rr_connectivity, 0, sizeof(rr_connectivity_data));
-  grpc_closure_init(&rr_connectivity->on_change, glb_rr_connectivity_changed,
-                    rr_connectivity);
-  rr_connectivity->glb_policy = glb_policy;
-  glb_policy->rr_connectivity = rr_connectivity;
-
   grpc_lb_policy_init(&glb_policy->base, &glb_lb_policy_vtable);
   gpr_mu_init(&glb_policy->mu);
   grpc_connectivity_state_init(&glb_policy->state_tracker, GRPC_CHANNEL_IDLE,
                                "grpclb");
+
   return &glb_policy->base;
 }
 
@@ -710,21 +873,38 @@ static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
   }
   gpr_mu_destroy(&glb_policy->mu);
-  grpc_lb_addresses_destroy(glb_policy->addresses);
   gpr_free(glb_policy);
 }
 
-static void lb_client_data_destroy(struct lb_client_data *lb_client);
 static void glb_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   glb_lb_policy *glb_policy = (glb_lb_policy *)pol;
   gpr_mu_lock(&glb_policy->mu);
+  glb_policy->shutting_down = true;
 
   pending_pick *pp = glb_policy->pending_picks;
   glb_policy->pending_picks = NULL;
   pending_ping *pping = glb_policy->pending_pings;
   glb_policy->pending_pings = NULL;
+  if (glb_policy->rr_policy) {
+    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy, "glb_shutdown");
+  }
+  grpc_connectivity_state_set(
+      exec_ctx, &glb_policy->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+      GRPC_ERROR_CREATE("Channel Shutdown"), "glb_shutdown");
+  /* We need a copy of the lb_call pointer because we can't cancell the call
+   * while holding glb_policy->mu: lb_on_server_status_received, invoked due to
+   * the cancel, needs to acquire that same lock */
+  grpc_call *lb_call = glb_policy->lb_call;
   gpr_mu_unlock(&glb_policy->mu);
 
+  /* glb_policy->lb_call and this local lb_call must be consistent at this point
+   * because glb_policy->lb_call is only assigned in lb_call_init_locked as part
+   * of query_for_backends_locked, which can only be invoked while
+   * glb_policy->shutting_down is false. */
+  if (lb_call != NULL) {
+    grpc_call_cancel(lb_call, NULL);
+    /* lb_on_server_status_received will pick up the cancel and clean up */
+  }
   while (pp != NULL) {
     pending_pick *next = pp->next;
     *pp->target = NULL;
@@ -739,21 +919,6 @@ static void glb_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
                         GRPC_ERROR_NONE, NULL);
     pping = next;
   }
-
-  if (glb_policy->rr_policy) {
-    /* unsubscribe */
-    grpc_lb_policy_notify_on_state_change(
-        exec_ctx, glb_policy->rr_policy, NULL,
-        &glb_policy->rr_connectivity->on_change);
-    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy, "glb_shutdown");
-  }
-
-  lb_client_data_destroy(glb_policy->lb_client);
-  glb_policy->lb_client = NULL;
-
-  grpc_connectivity_state_set(
-      exec_ctx, &glb_policy->state_tracker, GRPC_CHANNEL_SHUTDOWN,
-      GRPC_ERROR_CREATE("Channel Shutdown"), "glb_shutdown");
 }
 
 static void glb_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
@@ -780,17 +945,12 @@ static void glb_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static grpc_call *lb_client_data_get_call(struct lb_client_data *lb_client);
 static void glb_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
                              uint32_t initial_metadata_flags_mask,
                              uint32_t initial_metadata_flags_eq,
                              grpc_error *error) {
   glb_lb_policy *glb_policy = (glb_lb_policy *)pol;
   gpr_mu_lock(&glb_policy->mu);
-  if (glb_policy->lb_client != NULL) {
-    /* cancel the call to the load balancer service, if any */
-    grpc_call_cancel(lb_client_data_get_call(glb_policy->lb_client), NULL);
-  }
   pending_pick *pp = glb_policy->pending_picks;
   glb_policy->pending_picks = NULL;
   while (pp != NULL) {
@@ -810,18 +970,20 @@ static void glb_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static void query_for_backends(grpc_exec_ctx *exec_ctx,
-                               glb_lb_policy *glb_policy);
-static void start_picking(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy) {
+static void query_for_backends_locked(grpc_exec_ctx *exec_ctx,
+                                      glb_lb_policy *glb_policy);
+static void start_picking_locked(grpc_exec_ctx *exec_ctx,
+                                 glb_lb_policy *glb_policy) {
   glb_policy->started_picking = true;
-  query_for_backends(exec_ctx, glb_policy);
+  gpr_backoff_reset(&glb_policy->lb_call_backoff_state);
+  query_for_backends_locked(exec_ctx, glb_policy);
 }
 
 static void glb_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   glb_lb_policy *glb_policy = (glb_lb_policy *)pol;
   gpr_mu_lock(&glb_policy->mu);
   if (!glb_policy->started_picking) {
-    start_picking(exec_ctx, glb_policy);
+    start_picking_locked(exec_ctx, glb_policy);
   }
   gpr_mu_unlock(&glb_policy->mu);
 }
@@ -847,8 +1009,8 @@ static int glb_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
 
   if (glb_policy->rr_policy != NULL) {
     if (grpc_lb_glb_trace) {
-      gpr_log(GPR_INFO, "about to PICK from 0x%" PRIxPTR "",
-              (intptr_t)glb_policy->rr_policy);
+      gpr_log(GPR_INFO, "grpclb %p about to PICK from RR %p",
+              (void *)glb_policy, (void *)glb_policy->rr_policy);
     }
     GRPC_LB_POLICY_REF(glb_policy->rr_policy, "glb_pick");
 
@@ -865,11 +1027,17 @@ static int glb_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
     pick_done = pick_from_internal_rr_locked(exec_ctx, glb_policy->rr_policy,
                                              pick_args, target, wc_arg);
   } else {
+    if (grpc_lb_glb_trace) {
+      gpr_log(GPR_DEBUG,
+              "No RR policy in grpclb instance %p. Adding to grpclb's pending "
+              "picks",
+              (void *)(glb_policy));
+    }
     add_pending_pick(&glb_policy->pending_picks, pick_args, target,
                      on_complete);
 
     if (!glb_policy->started_picking) {
-      start_picking(exec_ctx, glb_policy);
+      start_picking_locked(exec_ctx, glb_policy);
     }
     pick_done = false;
   }
@@ -898,7 +1066,7 @@ static void glb_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   } else {
     add_pending_ping(&glb_policy->pending_pings, closure);
     if (!glb_policy->started_picking) {
-      start_picking(exec_ctx, glb_policy);
+      start_picking_locked(exec_ctx, glb_policy);
     }
   }
   gpr_mu_unlock(&glb_policy->mu);
@@ -916,250 +1084,190 @@ static void glb_notify_on_state_change(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&glb_policy->mu);
 }
 
-/*
- * lb_client_data
- *
- * Used internally for the client call to the LB */
-typedef struct lb_client_data {
-  gpr_mu mu;
-
-  /* called once initial metadata's been sent */
-  grpc_closure md_sent;
-
-  /* called once the LoadBalanceRequest has been sent to the LB server. See
-   * src/proto/grpc/.../load_balancer.proto */
-  grpc_closure req_sent;
-
-  /* A response from the LB server has been received (or error). Process it */
-  grpc_closure res_rcvd;
-
-  /* After the client has sent a close to the LB server */
-  grpc_closure close_sent;
-
-  /* ... and the status from the LB server has been received */
-  grpc_closure srv_status_rcvd;
-
-  grpc_call *lb_call;    /* streaming call to the LB server, */
-  gpr_timespec deadline; /* for the streaming call to the LB server */
-
-  grpc_metadata_array initial_metadata_recv;  /* initial MD from LB server */
-  grpc_metadata_array trailing_metadata_recv; /* trailing MD from LB server */
-
-  /* what's being sent to the LB server. Note that its value may vary if the LB
-   * server indicates a redirect. */
-  grpc_byte_buffer *request_payload;
-
-  /* response from the LB server, if any. Processed in res_recv_cb() */
-  grpc_byte_buffer *response_payload;
-
-  /* the call's status and status detailset in srv_status_rcvd_cb() */
-  grpc_status_code status;
-  char *status_details;
-  size_t status_details_capacity;
-
-  /* pointer back to the enclosing policy */
-  glb_lb_policy *glb_policy;
-} lb_client_data;
-
-static void md_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
-static void req_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
-static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
-static void close_sent_cb(grpc_exec_ctx *exec_ctx, void *arg,
-                          grpc_error *error);
-static void srv_status_rcvd_cb(grpc_exec_ctx *exec_ctx, void *arg,
-                               grpc_error *error);
-
-static lb_client_data *lb_client_data_create(glb_lb_policy *glb_policy) {
+static void lb_on_server_status_received(grpc_exec_ctx *exec_ctx, void *arg,
+                                         grpc_error *error);
+static void lb_on_response_received(grpc_exec_ctx *exec_ctx, void *arg,
+                                    grpc_error *error);
+static void lb_call_init_locked(glb_lb_policy *glb_policy) {
   GPR_ASSERT(glb_policy->server_name != NULL);
   GPR_ASSERT(glb_policy->server_name[0] != '\0');
-
-  lb_client_data *lb_client = gpr_malloc(sizeof(lb_client_data));
-  memset(lb_client, 0, sizeof(lb_client_data));
-
-  gpr_mu_init(&lb_client->mu);
-  grpc_closure_init(&lb_client->md_sent, md_sent_cb, lb_client);
-
-  grpc_closure_init(&lb_client->req_sent, req_sent_cb, lb_client);
-  grpc_closure_init(&lb_client->res_rcvd, res_recv_cb, lb_client);
-  grpc_closure_init(&lb_client->close_sent, close_sent_cb, lb_client);
-  grpc_closure_init(&lb_client->srv_status_rcvd, srv_status_rcvd_cb, lb_client);
-
-  lb_client->deadline = glb_policy->deadline;
+  GPR_ASSERT(!glb_policy->shutting_down);
 
   /* Note the following LB call progresses every time there's activity in \a
    * glb_policy->base.interested_parties, which is comprised of the polling
    * entities from \a client_channel. */
-  lb_client->lb_call = grpc_channel_create_pollset_set_call(
+  glb_policy->lb_call = grpc_channel_create_pollset_set_call(
       glb_policy->lb_channel, NULL, GRPC_PROPAGATE_DEFAULTS,
       glb_policy->base.interested_parties,
       "/grpc.lb.v1.LoadBalancer/BalanceLoad", glb_policy->server_name,
-      lb_client->deadline, NULL);
+      glb_policy->deadline, NULL);
 
-  grpc_metadata_array_init(&lb_client->initial_metadata_recv);
-  grpc_metadata_array_init(&lb_client->trailing_metadata_recv);
+  grpc_metadata_array_init(&glb_policy->lb_initial_metadata_recv);
+  grpc_metadata_array_init(&glb_policy->lb_trailing_metadata_recv);
 
   grpc_grpclb_request *request =
       grpc_grpclb_request_create(glb_policy->server_name);
-  gpr_slice request_payload_slice = grpc_grpclb_request_encode(request);
-  lb_client->request_payload =
+  grpc_slice request_payload_slice = grpc_grpclb_request_encode(request);
+  glb_policy->lb_request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
-  gpr_slice_unref(request_payload_slice);
+  grpc_slice_unref(request_payload_slice);
   grpc_grpclb_request_destroy(request);
 
-  lb_client->status_details = NULL;
-  lb_client->status_details_capacity = 0;
-  lb_client->glb_policy = glb_policy;
-  return lb_client;
+  glb_policy->lb_call_status_details = NULL;
+  glb_policy->lb_call_status_details_capacity = 0;
+
+  grpc_closure_init(&glb_policy->lb_on_server_status_received,
+                    lb_on_server_status_received, glb_policy);
+  grpc_closure_init(&glb_policy->lb_on_response_received,
+                    lb_on_response_received, glb_policy);
+
+  gpr_backoff_init(&glb_policy->lb_call_backoff_state,
+                   GRPC_GRPCLB_INITIAL_CONNECT_BACKOFF_SECONDS,
+                   GRPC_GRPCLB_RECONNECT_BACKOFF_MULTIPLIER,
+                   GRPC_GRPCLB_RECONNECT_JITTER,
+                   GRPC_GRPCLB_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
+                   GRPC_GRPCLB_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
 }
 
-static void lb_client_data_destroy(lb_client_data *lb_client) {
-  grpc_call_destroy(lb_client->lb_call);
-  grpc_metadata_array_destroy(&lb_client->initial_metadata_recv);
-  grpc_metadata_array_destroy(&lb_client->trailing_metadata_recv);
+static void lb_call_destroy_locked(glb_lb_policy *glb_policy) {
+  GPR_ASSERT(glb_policy->lb_call != NULL);
+  grpc_call_destroy(glb_policy->lb_call);
+  glb_policy->lb_call = NULL;
 
-  grpc_byte_buffer_destroy(lb_client->request_payload);
+  grpc_metadata_array_destroy(&glb_policy->lb_initial_metadata_recv);
+  grpc_metadata_array_destroy(&glb_policy->lb_trailing_metadata_recv);
 
-  gpr_free(lb_client->status_details);
-  gpr_mu_destroy(&lb_client->mu);
-  gpr_free(lb_client);
-}
-static grpc_call *lb_client_data_get_call(lb_client_data *lb_client) {
-  return lb_client->lb_call;
+  grpc_byte_buffer_destroy(glb_policy->lb_request_payload);
+  gpr_free(glb_policy->lb_call_status_details);
 }
 
 /*
  * Auxiliary functions and LB client callbacks.
  */
-static void query_for_backends(grpc_exec_ctx *exec_ctx,
-                               glb_lb_policy *glb_policy) {
+static void query_for_backends_locked(grpc_exec_ctx *exec_ctx,
+                                      glb_lb_policy *glb_policy) {
   GPR_ASSERT(glb_policy->lb_channel != NULL);
+  if (glb_policy->shutting_down) return;
+
+  lb_call_init_locked(glb_policy);
+
+  if (grpc_lb_glb_trace) {
+    gpr_log(GPR_INFO, "Query for backends (grpclb: %p, lb_call: %p)",
+            (void *)glb_policy, (void *)glb_policy->lb_call);
+  }
+  GPR_ASSERT(glb_policy->lb_call != NULL);
 
-  glb_policy->lb_client = lb_client_data_create(glb_policy);
   grpc_call_error call_error;
-  grpc_op ops[1];
+  grpc_op ops[4];
   memset(ops, 0, sizeof(ops));
+
   grpc_op *op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->flags = 0;
   op->reserved = NULL;
   op++;
-  call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_client->lb_call, ops, (size_t)(op - ops),
-      &glb_policy->lb_client->md_sent);
-  GPR_ASSERT(GRPC_CALL_OK == call_error);
 
-  op = ops;
-  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-  op->data.recv_status_on_client.trailing_metadata =
-      &glb_policy->lb_client->trailing_metadata_recv;
-  op->data.recv_status_on_client.status = &glb_policy->lb_client->status;
-  op->data.recv_status_on_client.status_details =
-      &glb_policy->lb_client->status_details;
-  op->data.recv_status_on_client.status_details_capacity =
-      &glb_policy->lb_client->status_details_capacity;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &glb_policy->lb_initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
-  call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_client->lb_call, ops, (size_t)(op - ops),
-      &glb_policy->lb_client->srv_status_rcvd);
-  GPR_ASSERT(GRPC_CALL_OK == call_error);
-}
-
-static void md_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  lb_client_data *lb_client = arg;
-  GPR_ASSERT(lb_client->lb_call);
-  grpc_op ops[1];
-  memset(ops, 0, sizeof(ops));
-  grpc_op *op = ops;
 
+  GPR_ASSERT(glb_policy->lb_request_payload != NULL);
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = lb_client->request_payload;
+  op->data.send_message = glb_policy->lb_request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
-  grpc_call_error call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, lb_client->lb_call, ops, (size_t)(op - ops),
-      &lb_client->req_sent);
-  GPR_ASSERT(GRPC_CALL_OK == call_error);
-}
-
-static void req_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  lb_client_data *lb_client = arg;
-  GPR_ASSERT(lb_client->lb_call);
 
-  grpc_op ops[2];
-  memset(ops, 0, sizeof(ops));
-  grpc_op *op = ops;
-
-  op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &lb_client->initial_metadata_recv;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata =
+      &glb_policy->lb_trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &glb_policy->lb_call_status;
+  op->data.recv_status_on_client.status_details =
+      &glb_policy->lb_call_status_details;
+  op->data.recv_status_on_client.status_details_capacity =
+      &glb_policy->lb_call_status_details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
+  /* take a weak ref (won't prevent calling of \a glb_shutdown if the strong ref
+   * count goes to zero) to be unref'd in lb_on_server_status_received */
+  GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "lb_on_server_status_received");
+  call_error = grpc_call_start_batch_and_execute(
+      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      &glb_policy->lb_on_server_status_received);
+  GPR_ASSERT(GRPC_CALL_OK == call_error);
 
+  op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &lb_client->response_payload;
+  op->data.recv_message = &glb_policy->lb_response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
-  grpc_call_error call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, lb_client->lb_call, ops, (size_t)(op - ops),
-      &lb_client->res_rcvd);
+  /* take another weak ref to be unref'd in lb_on_response_received */
+  GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "lb_on_response_received");
+  call_error = grpc_call_start_batch_and_execute(
+      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      &glb_policy->lb_on_response_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 }
 
-static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  lb_client_data *lb_client = arg;
+static void lb_on_response_received(grpc_exec_ctx *exec_ctx, void *arg,
+                                    grpc_error *error) {
+  glb_lb_policy *glb_policy = arg;
+
   grpc_op ops[2];
   memset(ops, 0, sizeof(ops));
   grpc_op *op = ops;
-  if (lb_client->response_payload != NULL) {
+  gpr_mu_lock(&glb_policy->mu);
+  if (glb_policy->lb_response_payload != NULL) {
+    gpr_backoff_reset(&glb_policy->lb_call_backoff_state);
     /* Received data from the LB server. Look inside
-     * lb_client->response_payload, for a serverlist. */
+     * glb_policy->lb_response_payload, for a serverlist. */
     grpc_byte_buffer_reader bbr;
-    grpc_byte_buffer_reader_init(&bbr, lb_client->response_payload);
-    gpr_slice response_slice = grpc_byte_buffer_reader_readall(&bbr);
-    grpc_byte_buffer_destroy(lb_client->response_payload);
+    grpc_byte_buffer_reader_init(&bbr, glb_policy->lb_response_payload);
+    grpc_slice response_slice = grpc_byte_buffer_reader_readall(&bbr);
+    grpc_byte_buffer_destroy(glb_policy->lb_response_payload);
     grpc_grpclb_serverlist *serverlist =
         grpc_grpclb_response_parse_serverlist(response_slice);
     if (serverlist != NULL) {
-      gpr_slice_unref(response_slice);
+      GPR_ASSERT(glb_policy->lb_call != NULL);
+      grpc_slice_unref(response_slice);
       if (grpc_lb_glb_trace) {
         gpr_log(GPR_INFO, "Serverlist with %lu servers received",
                 (unsigned long)serverlist->num_servers);
+        for (size_t i = 0; i < serverlist->num_servers; ++i) {
+          grpc_resolved_address addr;
+          parse_server(serverlist->servers[i], &addr);
+          char *ipport;
+          grpc_sockaddr_to_string(&ipport, &addr, false);
+          gpr_log(GPR_INFO, "Serverlist[%lu]: %s", (unsigned long)i, ipport);
+          gpr_free(ipport);
+        }
       }
 
       /* update serverlist */
       if (serverlist->num_servers > 0) {
-        gpr_mu_lock(&lb_client->glb_policy->mu);
-        if (grpc_grpclb_serverlist_equals(lb_client->glb_policy->serverlist,
-                                          serverlist)) {
+        if (grpc_grpclb_serverlist_equals(glb_policy->serverlist, serverlist)) {
           if (grpc_lb_glb_trace) {
             gpr_log(GPR_INFO,
                     "Incoming server list identical to current, ignoring.");
           }
+          grpc_grpclb_destroy_serverlist(serverlist);
         } else { /* new serverlist */
-          if (lb_client->glb_policy->serverlist != NULL) {
+          if (glb_policy->serverlist != NULL) {
             /* dispose of the old serverlist */
-            grpc_grpclb_destroy_serverlist(lb_client->glb_policy->serverlist);
+            grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
           }
-          /* and update the copy in the glb_lb_policy instance */
-          lb_client->glb_policy->serverlist = serverlist;
-        }
-        if (lb_client->glb_policy->rr_policy == NULL) {
-          /* initial "handover", in this case from a null RR policy, meaning
-           * it'll just create the first RR policy instance */
-          rr_handover_locked(exec_ctx, lb_client->glb_policy, error);
-        } else {
-          /* unref the RR policy, eventually leading to its substitution with a
-           * new one constructed from the received serverlist (see
-           * glb_rr_connectivity_changed) */
-          GRPC_LB_POLICY_UNREF(exec_ctx, lb_client->glb_policy->rr_policy,
-                               "serverlist_received");
+          /* and update the copy in the glb_lb_policy instance. This serverlist
+           * instance will be destroyed either upon the next update or in
+           * glb_destroy() */
+          glb_policy->serverlist = serverlist;
+
+          rr_handover_locked(exec_ctx, glb_policy);
         }
-        gpr_mu_unlock(&lb_client->glb_policy->mu);
       } else {
         if (grpc_lb_glb_trace) {
           gpr_log(GPR_INFO,
@@ -1167,60 +1275,95 @@ static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
                   "response with > 0 servers is received");
         }
       }
+    } else { /* serverlist == NULL */
+      gpr_log(GPR_ERROR, "Invalid LB response received: '%s'. Ignoring.",
+              grpc_dump_slice(response_slice, GPR_DUMP_ASCII | GPR_DUMP_HEX));
+      grpc_slice_unref(response_slice);
+    }
 
+    if (!glb_policy->shutting_down) {
       /* keep listening for serverlist updates */
       op->op = GRPC_OP_RECV_MESSAGE;
-      op->data.recv_message = &lb_client->response_payload;
+      op->data.recv_message = &glb_policy->lb_response_payload;
       op->flags = 0;
       op->reserved = NULL;
       op++;
+      /* reuse the "lb_on_response_received" weak ref taken in
+       * query_for_backends_locked() */
       const grpc_call_error call_error = grpc_call_start_batch_and_execute(
-          exec_ctx, lb_client->lb_call, ops, (size_t)(op - ops),
-          &lb_client->res_rcvd); /* loop */
+          exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+          &glb_policy->lb_on_response_received); /* loop */
       GPR_ASSERT(GRPC_CALL_OK == call_error);
-      return;
     }
-
-    GPR_ASSERT(serverlist == NULL);
-    gpr_log(GPR_ERROR, "Invalid LB response received: '%s'",
-            gpr_dump_slice(response_slice, GPR_DUMP_ASCII));
-    gpr_slice_unref(response_slice);
-
-    /* Disconnect from server returning invalid response. */
-    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-    op->flags = 0;
-    op->reserved = NULL;
-    op++;
-    grpc_call_error call_error = grpc_call_start_batch_and_execute(
-        exec_ctx, lb_client->lb_call, ops, (size_t)(op - ops),
-        &lb_client->close_sent);
-    GPR_ASSERT(GRPC_CALL_OK == call_error);
+    gpr_mu_unlock(&glb_policy->mu);
+  } else { /* empty payload: call cancelled. */
+           /* dispose of the "lb_on_response_received" weak ref taken in
+            * query_for_backends_locked() and reused in every reception loop */
+    gpr_mu_unlock(&glb_policy->mu);
+    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+                              "lb_on_response_received_empty_payload");
   }
-  /* empty payload: call cancelled by server. Cleanups happening in
-   * srv_status_rcvd_cb */
 }
 
-static void close_sent_cb(grpc_exec_ctx *exec_ctx, void *arg,
-                          grpc_error *error) {
-  if (grpc_lb_glb_trace) {
-    gpr_log(GPR_INFO,
-            "Close from LB client sent. Waiting from server status now");
+static void lb_call_on_retry_timer(grpc_exec_ctx *exec_ctx, void *arg,
+                                   grpc_error *error) {
+  glb_lb_policy *glb_policy = arg;
+  gpr_mu_lock(&glb_policy->mu);
+
+  if (!glb_policy->shutting_down) {
+    if (grpc_lb_glb_trace) {
+      gpr_log(GPR_INFO, "Restaring call to LB server (grpclb %p)",
+              (void *)glb_policy);
+    }
+    GPR_ASSERT(glb_policy->lb_call == NULL);
+    query_for_backends_locked(exec_ctx, glb_policy);
   }
+  gpr_mu_unlock(&glb_policy->mu);
+  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+                            "grpclb_on_retry_timer");
 }
 
-static void srv_status_rcvd_cb(grpc_exec_ctx *exec_ctx, void *arg,
-                               grpc_error *error) {
-  lb_client_data *lb_client = arg;
+static void lb_on_server_status_received(grpc_exec_ctx *exec_ctx, void *arg,
+                                         grpc_error *error) {
+  glb_lb_policy *glb_policy = arg;
+  gpr_mu_lock(&glb_policy->mu);
+
+  GPR_ASSERT(glb_policy->lb_call != NULL);
+
   if (grpc_lb_glb_trace) {
-    gpr_log(GPR_INFO,
-            "status from lb server received. Status = %d, Details = '%s', "
-            "Capacity "
-            "= %lu",
-            lb_client->status, lb_client->status_details,
-            (unsigned long)lb_client->status_details_capacity);
+    gpr_log(GPR_DEBUG,
+            "Status from LB server received. Status = %d, Details = '%s', "
+            "(call: %p)",
+            glb_policy->lb_call_status, glb_policy->lb_call_status_details,
+            (void *)glb_policy->lb_call);
   }
-  /* TODO(dgq): deal with stream termination properly (fire up another one?
-   * fail the original call?) */
+
+  /* We need to performe cleanups no matter what. */
+  lb_call_destroy_locked(glb_policy);
+
+  if (!glb_policy->shutting_down) {
+    /* if we aren't shutting down, restart the LB client call after some time */
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    gpr_timespec next_try =
+        gpr_backoff_step(&glb_policy->lb_call_backoff_state, now);
+    if (grpc_lb_glb_trace) {
+      gpr_log(GPR_DEBUG, "Connection to LB server lost (grpclb: %p)...",
+              (void *)glb_policy);
+      gpr_timespec timeout = gpr_time_sub(next_try, now);
+      if (gpr_time_cmp(timeout, gpr_time_0(timeout.clock_type)) > 0) {
+        gpr_log(GPR_DEBUG, "... retrying in %" PRId64 ".%09d seconds.",
+                timeout.tv_sec, timeout.tv_nsec);
+      } else {
+        gpr_log(GPR_DEBUG, "... retrying immediately.");
+      }
+    }
+    GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "grpclb_retry_timer");
+    grpc_timer_init(exec_ctx, &glb_policy->lb_call_retry_timer, next_try,
+                    lb_call_on_retry_timer, glb_policy, now);
+  }
+  gpr_mu_unlock(&glb_policy->mu);
+  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+                            "lb_on_server_status_received");
 }
 
 /* Code wiring the policy with the rest of the core */
diff --git a/src/core/ext/lb_policy/grpclb/load_balancer_api.c b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
index a8881004a0..837e9c1113 100644
--- a/src/core/ext/lb_policy/grpclb/load_balancer_api.c
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
@@ -90,18 +90,18 @@ grpc_grpclb_request *grpc_grpclb_request_create(const char *lb_service_name) {
   return req;
 }
 
-gpr_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request) {
+grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request) {
   size_t encoded_length;
   pb_ostream_t sizestream;
   pb_ostream_t outputstream;
-  gpr_slice slice;
+  grpc_slice slice;
   memset(&sizestream, 0, sizeof(pb_ostream_t));
   pb_encode(&sizestream, grpc_lb_v1_LoadBalanceRequest_fields, request);
   encoded_length = sizestream.bytes_written;
 
-  slice = gpr_slice_malloc(encoded_length);
+  slice = grpc_slice_malloc(encoded_length);
   outputstream =
-      pb_ostream_from_buffer(GPR_SLICE_START_PTR(slice), encoded_length);
+      pb_ostream_from_buffer(GRPC_SLICE_START_PTR(slice), encoded_length);
   GPR_ASSERT(pb_encode(&outputstream, grpc_lb_v1_LoadBalanceRequest_fields,
                        request) != 0);
   return slice;
@@ -113,10 +113,10 @@ void grpc_grpclb_request_destroy(grpc_grpclb_request *request) {
 
 typedef grpc_lb_v1_LoadBalanceResponse grpc_grpclb_response;
 grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
-    gpr_slice encoded_grpc_grpclb_response) {
+    grpc_slice encoded_grpc_grpclb_response) {
   pb_istream_t stream =
-      pb_istream_from_buffer(GPR_SLICE_START_PTR(encoded_grpc_grpclb_response),
-                             GPR_SLICE_LENGTH(encoded_grpc_grpclb_response));
+      pb_istream_from_buffer(GRPC_SLICE_START_PTR(encoded_grpc_grpclb_response),
+                             GRPC_SLICE_LENGTH(encoded_grpc_grpclb_response));
   grpc_grpclb_response res;
   memset(&res, 0, sizeof(grpc_grpclb_response));
   if (!pb_decode(&stream, grpc_lb_v1_LoadBalanceResponse_fields, &res)) {
@@ -132,12 +132,12 @@ grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
 }
 
 grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
-    gpr_slice encoded_grpc_grpclb_response) {
+    grpc_slice encoded_grpc_grpclb_response) {
   bool status;
   decode_serverlist_arg arg;
   pb_istream_t stream =
-      pb_istream_from_buffer(GPR_SLICE_START_PTR(encoded_grpc_grpclb_response),
-                             GPR_SLICE_LENGTH(encoded_grpc_grpclb_response));
+      pb_istream_from_buffer(GRPC_SLICE_START_PTR(encoded_grpc_grpclb_response),
+                             GRPC_SLICE_LENGTH(encoded_grpc_grpclb_response));
   pb_istream_t stream_at_start = stream;
   grpc_grpclb_response res;
   memset(&res, 0, sizeof(grpc_grpclb_response));
diff --git a/src/core/ext/lb_policy/grpclb/load_balancer_api.h b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
index 079a64a3f3..b4c967e426 100644
--- a/src/core/ext/lb_policy/grpclb/load_balancer_api.h
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
 #define GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
 
-#include <grpc/support/slice_buffer.h>
+#include <grpc/slice_buffer.h>
 
 #include "src/core/ext/client_channel/lb_policy_factory.h"
 #include "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h"
@@ -60,7 +60,7 @@ typedef struct grpc_grpclb_serverlist {
 grpc_grpclb_request *grpc_grpclb_request_create(const char *lb_service_name);
 
 /** Protocol Buffers v3-encode \a request */
-gpr_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request);
+grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request);
 
 /** Destroy \a request */
 void grpc_grpclb_request_destroy(grpc_grpclb_request *request);
@@ -68,11 +68,11 @@ void grpc_grpclb_request_destroy(grpc_grpclb_request *request);
 /** Parse (ie, decode) the bytes in \a encoded_grpc_grpclb_response as a \a
  * grpc_grpclb_initial_response */
 grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
-    gpr_slice encoded_grpc_grpclb_response);
+    grpc_slice encoded_grpc_grpclb_response);
 
 /** Parse the list of servers from an encoded \a grpc_grpclb_response */
 grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
-    gpr_slice encoded_grpc_grpclb_response);
+    grpc_slice encoded_grpc_grpclb_response);
 
 /** Return a copy of \a sl. The caller is responsible for calling \a
  * grpc_grpclb_destroy_serverlist on the returned copy. */
diff --git a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
index 53fed22bae..e36d0966f8 100644
--- a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
+++ b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
@@ -77,7 +77,7 @@ typedef struct _grpc_lb_v1_Server {
     bool has_port;
     int32_t port;
     bool has_load_balance_token;
-    char load_balance_token[65];
+    char load_balance_token[50];
     bool has_drop_request;
     bool drop_request;
 /* @@protoc_insertion_point(struct:grpc_lb_v1_Server) */
@@ -172,7 +172,7 @@ extern const pb_field_t grpc_lb_v1_Server_fields[5];
 #define grpc_lb_v1_LoadBalanceResponse_size      (98 + grpc_lb_v1_ServerList_size)
 #define grpc_lb_v1_InitialLoadBalanceResponse_size 90
 /* grpc_lb_v1_ServerList_size depends on runtime parameters */
-#define grpc_lb_v1_Server_size                   98
+#define grpc_lb_v1_Server_size                   83
 
 /* Message IDs (where set with "msgid" option) */
 #ifdef PB_MSGID
diff --git a/src/core/ext/lb_policy/pick_first/pick_first.c b/src/core/ext/lb_policy/pick_first/pick_first.c
index ac3c6a305a..b9cfe6b5c0 100644
--- a/src/core/ext/lb_policy/pick_first/pick_first.c
+++ b/src/core/ext/lb_policy/pick_first/pick_first.c
@@ -292,6 +292,8 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
   } else {
   loop:
     switch (p->checking_connectivity) {
+      case GRPC_CHANNEL_INIT:
+        GPR_UNREACHABLE_CODE(return );
       case GRPC_CHANNEL_READY:
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_READY, GRPC_ERROR_NONE,
@@ -436,15 +438,10 @@ static grpc_lb_policy *create_pick_first(grpc_exec_ctx *exec_ctx,
                                          grpc_lb_policy_args *args) {
   GPR_ASSERT(args->client_channel_factory != NULL);
 
-  /* Get server name. */
-  const grpc_arg *arg =
-      grpc_channel_args_find(args->args, GRPC_ARG_SERVER_NAME);
-  const char *server_name =
-      arg != NULL && arg->type == GRPC_ARG_STRING ? arg->value.string : NULL;
-
   /* Find the number of backend addresses. We ignore balancer
    * addresses, since we don't know how to handle them. */
-  arg = grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
+  const grpc_arg *arg =
+      grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   GPR_ASSERT(arg != NULL && arg->type == GRPC_ARG_POINTER);
   grpc_lb_addresses *addresses = arg->value.pointer.p;
   size_t num_addrs = 0;
@@ -470,9 +467,6 @@ static grpc_lb_policy *create_pick_first(grpc_exec_ctx *exec_ctx,
     }
 
     memset(&sc_args, 0, sizeof(grpc_subchannel_args));
-    /* server_name will be copied as part of the subchannel creation. This makes
-     * the copying of server_name (a borrowed pointer) OK. */
-    sc_args.server_name = server_name;
     sc_args.addr = &addresses->addresses[i].address;
     sc_args.args = args->args;
 
diff --git a/src/core/ext/lb_policy/round_robin/round_robin.c b/src/core/ext/lb_policy/round_robin/round_robin.c
index 37a9b18b97..f0305473d2 100644
--- a/src/core/ext/lb_policy/round_robin/round_robin.c
+++ b/src/core/ext/lb_policy/round_robin/round_robin.c
@@ -116,15 +116,23 @@ typedef struct {
   grpc_closure connectivity_changed_closure;
   /** this subchannels current position in subchannel->ready_list */
   ready_list *ready_list_node;
-  /** last observed connectivity */
-  grpc_connectivity_state connectivity_state;
+  /** last observed connectivity. Not updated by
+   * \a grpc_subchannel_notify_on_state_change. Used to determine the previous
+   * state while processing the new state in \a rr_connectivity_changed */
+  grpc_connectivity_state prev_connectivity_state;
+  /** current connectivity state. Updated by \a
+   * grpc_subchannel_notify_on_state_change */
+  grpc_connectivity_state curr_connectivity_state;
   /** the subchannel's target user data */
   void *user_data;
+  /** vtable to operate over \a user_data */
+  const grpc_lb_user_data_vtable *user_data_vtable;
 } subchannel_data;
 
 struct round_robin_lb_policy {
   /** base policy: must be first */
   grpc_lb_policy base;
+  gpr_mu mu;
 
   /** total number of addresses received at creation time */
   size_t num_addresses;
@@ -133,8 +141,11 @@ struct round_robin_lb_policy {
   size_t num_subchannels;
   subchannel_data **subchannels;
 
-  /** mutex protecting remaining members */
-  gpr_mu mu;
+  /** how many subchannels are in TRANSIENT_FAILURE */
+  size_t num_transient_failures;
+  /** how many subchannels are IDLE */
+  size_t num_idle;
+
   /** have we started picking? */
   int started_picking;
   /** are we shutting down? */
@@ -186,9 +197,13 @@ static void advance_last_picked_locked(round_robin_lb_policy *p) {
   }
 
   if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "[READYLIST] ADVANCED LAST PICK. NOW AT NODE %p (SC %p)",
-            (void *)p->ready_list_last_pick,
-            (void *)p->ready_list_last_pick->subchannel);
+    gpr_log(GPR_DEBUG,
+            "[READYLIST, RR: %p] ADVANCED LAST PICK. NOW AT NODE %p (SC %p, "
+            "CSC %p)",
+            (void *)p, (void *)p->ready_list_last_pick,
+            (void *)p->ready_list_last_pick->subchannel,
+            (void *)grpc_subchannel_get_connected_subchannel(
+                p->ready_list_last_pick->subchannel));
   }
 }
 
@@ -252,12 +267,25 @@ static void remove_disconnected_sc_locked(round_robin_lb_policy *p,
   gpr_free(node);
 }
 
+static bool is_ready_list_empty(round_robin_lb_policy *p) {
+  return p->ready_list.prev == NULL;
+}
+
 static void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   ready_list *elem;
+
+  if (grpc_lb_round_robin_trace) {
+    gpr_log(GPR_DEBUG, "Destroying Round Robin policy at %p", (void *)pol);
+  }
+
   for (size_t i = 0; i < p->num_subchannels; i++) {
     subchannel_data *sd = p->subchannels[i];
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "round_robin");
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "rr_destroy");
+    if (sd->user_data != NULL) {
+      GPR_ASSERT(sd->user_data_vtable != NULL);
+      sd->user_data_vtable->destroy(sd->user_data);
+    }
     gpr_free(sd);
   }
 
@@ -285,6 +313,9 @@ static void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   size_t i;
 
   gpr_mu_lock(&p->mu);
+  if (grpc_lb_round_robin_trace) {
+    gpr_log(GPR_DEBUG, "Shutting down Round Robin policy at %p", (void *)pol);
+  }
 
   p->shutdown = 1;
   while ((pp = p->pending_picks)) {
@@ -296,7 +327,7 @@ static void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   }
   grpc_connectivity_state_set(
       exec_ctx, &p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
-      GRPC_ERROR_CREATE("Channel Shutdown"), "shutdown");
+      GRPC_ERROR_CREATE("Channel Shutdown"), "rr_shutdown");
   for (i = 0; i < p->num_subchannels; i++) {
     subchannel_data *sd = p->subchannels[i];
     grpc_subchannel_notify_on_state_change(exec_ctx, sd->subchannel, NULL, NULL,
@@ -363,18 +394,18 @@ static void start_picking(grpc_exec_ctx *exec_ctx, round_robin_lb_policy *p) {
   size_t i;
   p->started_picking = 1;
 
-  if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "LB_POLICY: p=%p num_subchannels=%" PRIuPTR, (void *)p,
-            p->num_subchannels);
-  }
-
   for (i = 0; i < p->num_subchannels; i++) {
     subchannel_data *sd = p->subchannels[i];
-    sd->connectivity_state = GRPC_CHANNEL_IDLE;
+    /* use some sentinel value outside of the range of grpc_connectivity_state
+     * to signal an undefined previous state. We won't be referring to this
+     * value again and it'll be overwritten after the first call to
+     * rr_connectivity_changed */
+    sd->prev_connectivity_state = GRPC_CHANNEL_INIT;
+    sd->curr_connectivity_state = GRPC_CHANNEL_IDLE;
+    GRPC_LB_POLICY_WEAK_REF(&p->base, "rr_connectivity");
     grpc_subchannel_notify_on_state_change(
         exec_ctx, sd->subchannel, p->base.interested_parties,
-        &sd->connectivity_state, &sd->connectivity_changed_closure);
-    GRPC_LB_POLICY_WEAK_REF(&p->base, "round_robin_connectivity");
+        &sd->curr_connectivity_state, &sd->connectivity_changed_closure);
   }
 }
 
@@ -395,11 +426,16 @@ static int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   pending_pick *pp;
   ready_list *selected;
   gpr_mu_lock(&p->mu);
+
+  if (grpc_lb_round_robin_trace) {
+    gpr_log(GPR_INFO, "Round Robin %p trying to pick", (void *)pol);
+  }
+
   if ((selected = peek_next_connected_locked(p))) {
     /* readily available, report right away */
     *target = GRPC_CONNECTED_SUBCHANNEL_REF(
         grpc_subchannel_get_connected_subchannel(selected->subchannel),
-        "picked");
+        "rr_picked");
 
     if (user_data != NULL) {
       *user_data = selected->user_data;
@@ -430,124 +466,184 @@ static int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   }
 }
 
+static void update_state_counters(subchannel_data *sd) {
+  round_robin_lb_policy *p = sd->policy;
+
+  /* update p->num_transient_failures (resp. p->num_idle): if the previous
+   * state was TRANSIENT_FAILURE (resp. IDLE), decrement
+   * p->num_transient_failures (resp. p->num_idle). */
+  if (sd->prev_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
+    GPR_ASSERT(p->num_transient_failures > 0);
+    --p->num_transient_failures;
+  } else if (sd->prev_connectivity_state == GRPC_CHANNEL_IDLE) {
+    GPR_ASSERT(p->num_idle > 0);
+    --p->num_idle;
+  }
+}
+
+/* sd is the subchannel_data associted with the updated subchannel.
+ * shutdown_error will only be used upon policy transition to TRANSIENT_FAILURE
+ * or SHUTDOWN */
+static grpc_connectivity_state update_lb_connectivity_status(
+    grpc_exec_ctx *exec_ctx, subchannel_data *sd, grpc_error *error) {
+  /* In priority order. The first rule to match terminates the search (ie, if we
+   * are on rule n, all previous rules were unfulfilled).
+   *
+   * 1) RULE: ANY subchannel is READY => policy is READY.
+   *    CHECK: At least one subchannel is ready iff p->ready_list is NOT empty.
+   *
+   * 2) RULE: ANY subchannel is CONNECTING => policy is CONNECTING.
+   *    CHECK: sd->curr_connectivity_state == CONNECTING.
+   *
+   * 3) RULE: ALL subchannels are SHUTDOWN => policy is SHUTDOWN.
+   *    CHECK: p->num_subchannels = 0.
+   *
+   * 4) RULE: ALL subchannels are TRANSIENT_FAILURE => policy is
+   *    TRANSIENT_FAILURE.
+   *    CHECK: p->num_transient_failures == p->num_subchannels.
+   *
+   * 5) RULE: ALL subchannels are IDLE => policy is IDLE.
+   *    CHECK: p->num_idle == p->num_subchannels.
+   */
+  round_robin_lb_policy *p = sd->policy;
+  if (!is_ready_list_empty(p)) { /* 1) READY */
+    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_READY,
+                                GRPC_ERROR_NONE, "rr_ready");
+    return GRPC_CHANNEL_READY;
+  } else if (sd->curr_connectivity_state ==
+             GRPC_CHANNEL_CONNECTING) { /* 2) CONNECTING */
+    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+                                GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE,
+                                "rr_connecting");
+    return GRPC_CHANNEL_CONNECTING;
+  } else if (p->num_subchannels == 0) { /* 3) SHUTDOWN */
+    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+                                GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
+                                "rr_shutdown");
+    return GRPC_CHANNEL_SHUTDOWN;
+  } else if (p->num_transient_failures ==
+             p->num_subchannels) { /* 4) TRANSIENT_FAILURE */
+    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+                                GRPC_CHANNEL_TRANSIENT_FAILURE,
+                                GRPC_ERROR_REF(error), "rr_transient_failure");
+    return GRPC_CHANNEL_TRANSIENT_FAILURE;
+  } else if (p->num_idle == p->num_subchannels) { /* 5) IDLE */
+    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_IDLE,
+                                GRPC_ERROR_NONE, "rr_idle");
+    return GRPC_CHANNEL_IDLE;
+  }
+  /* no change */
+  return sd->curr_connectivity_state;
+}
+
 static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     grpc_error *error) {
   subchannel_data *sd = arg;
   round_robin_lb_policy *p = sd->policy;
   pending_pick *pp;
-  ready_list *selected;
-
-  int unref = 0;
 
   GRPC_ERROR_REF(error);
   gpr_mu_lock(&p->mu);
 
   if (p->shutdown) {
-    unref = 1;
-  } else {
-    switch (sd->connectivity_state) {
-      case GRPC_CHANNEL_READY:
-        grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                    GRPC_CHANNEL_READY, GRPC_ERROR_REF(error),
-                                    "connecting_ready");
-        /* add the newly connected subchannel to the list of connected ones.
-         * Note that it goes to the "end of the line". */
-        sd->ready_list_node = add_connected_sc_locked(p, sd);
-        /* at this point we know there's at least one suitable subchannel. Go
-         * ahead and pick one and notify the pending suitors in
-         * p->pending_picks. This preemtively replicates rr_pick()'s actions. */
-        selected = peek_next_connected_locked(p);
-        if (p->pending_picks != NULL) {
-          /* if the selected subchannel is going to be used for the pending
-           * picks, update the last picked pointer */
-          advance_last_picked_locked(p);
+    gpr_mu_unlock(&p->mu);
+    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "rr_connectivity");
+    GRPC_ERROR_UNREF(error);
+    return;
+  }
+  switch (sd->curr_connectivity_state) {
+    case GRPC_CHANNEL_INIT:
+      GPR_UNREACHABLE_CODE(return );
+    case GRPC_CHANNEL_READY:
+      /* add the newly connected subchannel to the list of connected ones.
+       * Note that it goes to the "end of the line". */
+      sd->ready_list_node = add_connected_sc_locked(p, sd);
+      /* at this point we know there's at least one suitable subchannel. Go
+       * ahead and pick one and notify the pending suitors in
+       * p->pending_picks. This preemtively replicates rr_pick()'s actions. */
+      ready_list *selected = peek_next_connected_locked(p);
+      GPR_ASSERT(selected != NULL);
+      if (p->pending_picks != NULL) {
+        /* if the selected subchannel is going to be used for the pending
+         * picks, update the last picked pointer */
+        advance_last_picked_locked(p);
+      }
+      while ((pp = p->pending_picks)) {
+        p->pending_picks = pp->next;
+        *pp->target = GRPC_CONNECTED_SUBCHANNEL_REF(
+            grpc_subchannel_get_connected_subchannel(selected->subchannel),
+            "rr_picked");
+        if (pp->user_data != NULL) {
+          *pp->user_data = selected->user_data;
+        }
+        if (grpc_lb_round_robin_trace) {
+          gpr_log(GPR_DEBUG,
+                  "[RR CONN CHANGED] TARGET <-- SUBCHANNEL %p (NODE %p)",
+                  (void *)selected->subchannel, (void *)selected);
         }
+        grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE, NULL);
+        gpr_free(pp);
+      }
+      update_lb_connectivity_status(exec_ctx, sd, error);
+      sd->prev_connectivity_state = sd->curr_connectivity_state;
+      /* renew notification: reuses the "rr_connectivity" weak ref */
+      grpc_subchannel_notify_on_state_change(
+          exec_ctx, sd->subchannel, p->base.interested_parties,
+          &sd->curr_connectivity_state, &sd->connectivity_changed_closure);
+      break;
+    case GRPC_CHANNEL_IDLE:
+      ++p->num_idle;
+    /* fallthrough */
+    case GRPC_CHANNEL_CONNECTING:
+      update_state_counters(sd);
+      update_lb_connectivity_status(exec_ctx, sd, error);
+      sd->prev_connectivity_state = sd->curr_connectivity_state;
+      /* renew notification: reuses the "rr_connectivity" weak ref */
+      grpc_subchannel_notify_on_state_change(
+          exec_ctx, sd->subchannel, p->base.interested_parties,
+          &sd->curr_connectivity_state, &sd->connectivity_changed_closure);
+      break;
+    case GRPC_CHANNEL_TRANSIENT_FAILURE:
+      ++p->num_transient_failures;
+      /* remove from ready list if still present */
+      if (sd->ready_list_node != NULL) {
+        remove_disconnected_sc_locked(p, sd->ready_list_node);
+        sd->ready_list_node = NULL;
+      }
+      update_lb_connectivity_status(exec_ctx, sd, error);
+      sd->prev_connectivity_state = sd->curr_connectivity_state;
+      /* renew notification: reuses the "rr_connectivity" weak ref */
+      grpc_subchannel_notify_on_state_change(
+          exec_ctx, sd->subchannel, p->base.interested_parties,
+          &sd->curr_connectivity_state, &sd->connectivity_changed_closure);
+      break;
+    case GRPC_CHANNEL_SHUTDOWN:
+      update_state_counters(sd);
+      if (sd->ready_list_node != NULL) {
+        remove_disconnected_sc_locked(p, sd->ready_list_node);
+        sd->ready_list_node = NULL;
+      }
+      --p->num_subchannels;
+      GPR_SWAP(subchannel_data *, p->subchannels[sd->index],
+               p->subchannels[p->num_subchannels]);
+      GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "rr_subchannel_shutdown");
+      p->subchannels[sd->index]->index = sd->index;
+      if (update_lb_connectivity_status(exec_ctx, sd, error) ==
+          GRPC_CHANNEL_SHUTDOWN) {
+        /* the policy is shutting down. Flush all the pending picks... */
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
-
-          *pp->target = GRPC_CONNECTED_SUBCHANNEL_REF(
-              grpc_subchannel_get_connected_subchannel(selected->subchannel),
-              "picked");
-          if (pp->user_data != NULL) {
-            *pp->user_data = selected->user_data;
-          }
-          if (grpc_lb_round_robin_trace) {
-            gpr_log(GPR_DEBUG,
-                    "[RR CONN CHANGED] TARGET <-- SUBCHANNEL %p (NODE %p)",
-                    (void *)selected->subchannel, (void *)selected);
-          }
+          *pp->target = NULL;
           grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE, NULL);
           gpr_free(pp);
         }
-        grpc_subchannel_notify_on_state_change(
-            exec_ctx, sd->subchannel, p->base.interested_parties,
-            &sd->connectivity_state, &sd->connectivity_changed_closure);
-        break;
-      case GRPC_CHANNEL_CONNECTING:
-      case GRPC_CHANNEL_IDLE:
-        grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, sd->connectivity_state,
-            GRPC_ERROR_REF(error), "connecting_changed");
-        grpc_subchannel_notify_on_state_change(
-            exec_ctx, sd->subchannel, p->base.interested_parties,
-            &sd->connectivity_state, &sd->connectivity_changed_closure);
-        break;
-      case GRPC_CHANNEL_TRANSIENT_FAILURE:
-        /* renew state notification */
-        grpc_subchannel_notify_on_state_change(
-            exec_ctx, sd->subchannel, p->base.interested_parties,
-            &sd->connectivity_state, &sd->connectivity_changed_closure);
-
-        /* remove from ready list if still present */
-        if (sd->ready_list_node != NULL) {
-          remove_disconnected_sc_locked(p, sd->ready_list_node);
-          sd->ready_list_node = NULL;
-        }
-        grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
-            GRPC_ERROR_REF(error), "connecting_transient_failure");
-        break;
-      case GRPC_CHANNEL_SHUTDOWN:
-        if (sd->ready_list_node != NULL) {
-          remove_disconnected_sc_locked(p, sd->ready_list_node);
-          sd->ready_list_node = NULL;
-        }
-
-        p->num_subchannels--;
-        GPR_SWAP(subchannel_data *, p->subchannels[sd->index],
-                 p->subchannels[p->num_subchannels]);
-        GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "round_robin");
-        p->subchannels[sd->index]->index = sd->index;
-        gpr_free(sd);
-
-        unref = 1;
-        if (p->num_subchannels == 0) {
-          grpc_connectivity_state_set(
-              exec_ctx, &p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
-              GRPC_ERROR_CREATE_REFERENCING("Round Robin Channels Exhausted",
-                                            &error, 1),
-              "no_more_channels");
-          while ((pp = p->pending_picks)) {
-            p->pending_picks = pp->next;
-            *pp->target = NULL;
-            grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE,
-                                NULL);
-            gpr_free(pp);
-          }
-        } else {
-          grpc_connectivity_state_set(
-              exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
-              GRPC_ERROR_REF(error), "subchannel_failed");
-        }
-    } /* switch */
-  }   /* !unref */
-
-  gpr_mu_unlock(&p->mu);
-
-  if (unref) {
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "round_robin_connectivity");
+      }
+      gpr_free(sd);
+      /* unref the "rr_connectivity" weak ref from start_picking */
+      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "rr_connectivity");
+      break;
   }
-
+  gpr_mu_unlock(&p->mu);
   GRPC_ERROR_UNREF(error);
 }
 
@@ -583,8 +679,9 @@ static void rr_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
     gpr_mu_unlock(&p->mu);
     target = GRPC_CONNECTED_SUBCHANNEL_REF(
         grpc_subchannel_get_connected_subchannel(selected->subchannel),
-        "picked");
+        "rr_picked");
     grpc_connected_subchannel_ping(exec_ctx, target, closure);
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, target, "rr_picked");
   } else {
     gpr_mu_unlock(&p->mu);
     grpc_exec_ctx_sched(exec_ctx, closure,
@@ -606,15 +703,10 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
                                           grpc_lb_policy_args *args) {
   GPR_ASSERT(args->client_channel_factory != NULL);
 
-  /* Get server name. */
-  const grpc_arg *arg =
-      grpc_channel_args_find(args->args, GRPC_ARG_SERVER_NAME);
-  const char *server_name =
-      arg != NULL && arg->type == GRPC_ARG_STRING ? arg->value.string : NULL;
-
   /* Find the number of backend addresses. We ignore balancer
    * addresses, since we don't know how to handle them. */
-  arg = grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
+  const grpc_arg *arg =
+      grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   GPR_ASSERT(arg != NULL && arg->type == GRPC_ARG_POINTER);
   grpc_lb_addresses *addresses = arg->value.pointer.p;
   size_t num_addrs = 0;
@@ -637,9 +729,6 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
     if (addresses->addresses[i].is_balancer) continue;
 
     memset(&sc_args, 0, sizeof(grpc_subchannel_args));
-    /* server_name will be copied as part of the subchannel creation. This makes
-     * the copying of server_name (a borrowed pointer) OK. */
-    sc_args.server_name = server_name;
     sc_args.addr = &addresses->addresses[i].address;
     sc_args.args = args->args;
 
@@ -653,7 +742,11 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
       sd->policy = p;
       sd->index = subchannel_idx;
       sd->subchannel = subchannel;
-      sd->user_data = addresses->addresses[i].user_data;
+      sd->user_data_vtable = addresses->user_data_vtable;
+      if (sd->user_data_vtable != NULL) {
+        sd->user_data =
+            sd->user_data_vtable->copy(addresses->addresses[i].user_data);
+      }
       ++subchannel_idx;
       grpc_closure_init(&sd->connectivity_changed_closure,
                         rr_connectivity_changed, sd);
@@ -676,6 +769,11 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
   grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable);
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                "round_robin");
+
+  if (grpc_lb_round_robin_trace) {
+    gpr_log(GPR_DEBUG, "Created RR policy at %p with %lu subchannels",
+            (void *)p, (unsigned long)p->num_subchannels);
+  }
   gpr_mu_init(&p->mu);
   return &p->base;
 }
diff --git a/src/core/ext/load_reporting/load_reporting_filter.c b/src/core/ext/load_reporting/load_reporting_filter.c
index eeae2400fb..18bb826948 100644
--- a/src/core/ext/load_reporting/load_reporting_filter.c
+++ b/src/core/ext/load_reporting/load_reporting_filter.c
@@ -152,9 +152,9 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
 }
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   GPR_ASSERT(!args->is_last);
 
   channel_data *chand = elem->channel_data;
@@ -171,6 +171,8 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
                                                 NULL,
                                                 NULL};
                                                 */
+
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -232,4 +234,5 @@ const grpc_channel_filter grpc_load_reporting_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "load_reporting"};
diff --git a/src/core/ext/resolver/dns/native/dns_resolver.c b/src/core/ext/resolver/dns/native/dns_resolver.c
index 958b8af8b2..2675fa931f 100644
--- a/src/core/ext/resolver/dns/native/dns_resolver.c
+++ b/src/core/ext/resolver/dns/native/dns_resolver.c
@@ -46,10 +46,11 @@
 #include "src/core/lib/support/backoff.h"
 #include "src/core/lib/support/string.h"
 
-#define BACKOFF_MULTIPLIER 1.6
-#define BACKOFF_JITTER 0.2
-#define BACKOFF_MIN_SECONDS 1
-#define BACKOFF_MAX_SECONDS 120
+#define GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS 1
+#define GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS 1
+#define GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER 1.6
+#define GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS 120
+#define GRPC_DNS_RECONNECT_JITTER 0.2
 
 typedef struct {
   /** base class: must be first */
@@ -60,6 +61,8 @@ typedef struct {
   char *default_port;
   /** channel args. */
   grpc_channel_args *channel_args;
+  /** pollset_set to drive the name resolution process */
+  grpc_pollset_set *interested_parties;
 
   /** mutex guarding the rest of the state */
   gpr_mu mu;
@@ -190,7 +193,7 @@ static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
     GPR_ASSERT(!r->have_retry_timer);
     r->have_retry_timer = true;
     GRPC_RESOLVER_REF(&r->base, "retry-timer");
-    if (gpr_time_cmp(timeout, gpr_time_0(timeout.clock_type)) <= 0) {
+    if (gpr_time_cmp(timeout, gpr_time_0(timeout.clock_type)) > 0) {
       gpr_log(GPR_DEBUG, "retrying in %" PRId64 ".%09d seconds", timeout.tv_sec,
               timeout.tv_nsec);
     } else {
@@ -217,6 +220,7 @@ static void dns_start_resolving_locked(grpc_exec_ctx *exec_ctx,
   r->resolving = true;
   r->addresses = NULL;
   grpc_resolve_address(exec_ctx, r->name_to_resolve, r->default_port,
+                       r->interested_parties,
                        grpc_closure_create(dns_on_resolved, r), &r->addresses);
 }
 
@@ -239,13 +243,15 @@ static void dns_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *gr) {
   if (r->resolved_result != NULL) {
     grpc_channel_args_destroy(r->resolved_result);
   }
+  grpc_pollset_set_destroy(r->interested_parties);
   gpr_free(r->name_to_resolve);
   gpr_free(r->default_port);
   grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static grpc_resolver *dns_create(grpc_resolver_args *args,
+static grpc_resolver *dns_create(grpc_exec_ctx *exec_ctx,
+                                 grpc_resolver_args *args,
                                  const char *default_port) {
   if (0 != strcmp(args->uri->authority, "")) {
     gpr_log(GPR_ERROR, "authority based dns uri's not supported");
@@ -263,14 +269,17 @@ static grpc_resolver *dns_create(grpc_resolver_args *args,
   grpc_resolver_init(&r->base, &dns_resolver_vtable);
   r->name_to_resolve = proxy_name == NULL ? gpr_strdup(path) : proxy_name;
   r->default_port = gpr_strdup(default_port);
-  grpc_arg server_name_arg;
-  server_name_arg.type = GRPC_ARG_STRING;
-  server_name_arg.key = GRPC_ARG_SERVER_NAME;
-  server_name_arg.value.string = (char *)path;
-  r->channel_args =
-      grpc_channel_args_copy_and_add(args->args, &server_name_arg, 1);
-  gpr_backoff_init(&r->backoff_state, BACKOFF_MULTIPLIER, BACKOFF_JITTER,
-                   BACKOFF_MIN_SECONDS * 1000, BACKOFF_MAX_SECONDS * 1000);
+  r->channel_args = grpc_channel_args_copy(args->args);
+  r->interested_parties = grpc_pollset_set_create();
+  if (args->pollset_set != NULL) {
+    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
+                                     args->pollset_set);
+  }
+  gpr_backoff_init(&r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS,
+                   GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER,
+                   GRPC_DNS_RECONNECT_JITTER,
+                   GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
+                   GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
   return &r->base;
 }
 
@@ -283,8 +292,9 @@ static void dns_factory_ref(grpc_resolver_factory *factory) {}
 static void dns_factory_unref(grpc_resolver_factory *factory) {}
 
 static grpc_resolver *dns_factory_create_resolver(
-    grpc_resolver_factory *factory, grpc_resolver_args *args) {
-  return dns_create(args, "https");
+    grpc_exec_ctx *exec_ctx, grpc_resolver_factory *factory,
+    grpc_resolver_args *args) {
+  return dns_create(exec_ctx, args, "https");
 }
 
 static char *dns_factory_get_default_host_name(grpc_resolver_factory *factory,
diff --git a/src/core/ext/resolver/sockaddr/sockaddr_resolver.c b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
index 5fec03a8e4..88808c674f 100644
--- a/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
+++ b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
@@ -47,6 +47,7 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 typedef struct {
@@ -169,17 +170,17 @@ static grpc_resolver *sockaddr_create(grpc_resolver_args *args,
     return NULL;
   }
   /* Construct addresses. */
-  gpr_slice path_slice =
-      gpr_slice_new(args->uri->path, strlen(args->uri->path), do_nothing);
-  gpr_slice_buffer path_parts;
-  gpr_slice_buffer_init(&path_parts);
-  gpr_slice_split(path_slice, ",", &path_parts);
+  grpc_slice path_slice =
+      grpc_slice_new(args->uri->path, strlen(args->uri->path), do_nothing);
+  grpc_slice_buffer path_parts;
+  grpc_slice_buffer_init(&path_parts);
+  grpc_slice_split(path_slice, ",", &path_parts);
   grpc_lb_addresses *addresses =
       grpc_lb_addresses_create(path_parts.count, NULL /* user_data_vtable */);
   bool errors_found = false;
   for (size_t i = 0; i < addresses->num_addresses; i++) {
     grpc_uri ith_uri = *args->uri;
-    char *part_str = gpr_dump_slice(path_parts.slices[i], GPR_DUMP_ASCII);
+    char *part_str = grpc_dump_slice(path_parts.slices[i], GPR_DUMP_ASCII);
     ith_uri.path = part_str;
     if (!parse(&ith_uri, &addresses->addresses[i].address)) {
       errors_found = true; /* GPR_TRUE */
@@ -187,8 +188,8 @@ static grpc_resolver *sockaddr_create(grpc_resolver_args *args,
     gpr_free(part_str);
     if (errors_found) break;
   }
-  gpr_slice_buffer_destroy(&path_parts);
-  gpr_slice_unref(path_slice);
+  grpc_slice_buffer_destroy(&path_parts);
+  grpc_slice_unref(path_slice);
   if (errors_found) {
     grpc_lb_addresses_destroy(addresses);
     return NULL;
@@ -197,12 +198,7 @@ static grpc_resolver *sockaddr_create(grpc_resolver_args *args,
   sockaddr_resolver *r = gpr_malloc(sizeof(sockaddr_resolver));
   memset(r, 0, sizeof(*r));
   r->addresses = addresses;
-  grpc_arg server_name_arg;
-  server_name_arg.type = GRPC_ARG_STRING;
-  server_name_arg.key = GRPC_ARG_SERVER_NAME;
-  server_name_arg.value.string = args->uri->path;
-  r->channel_args =
-      grpc_channel_args_copy_and_add(args->args, &server_name_arg, 1);
+  r->channel_args = grpc_channel_args_copy(args->args);
   gpr_mu_init(&r->mu);
   grpc_resolver_init(&r->base, &sockaddr_resolver_vtable);
   return &r->base;
@@ -218,7 +214,8 @@ static void sockaddr_factory_unref(grpc_resolver_factory *factory) {}
 
 #define DECL_FACTORY(name)                                                  \
   static grpc_resolver *name##_factory_create_resolver(                     \
-      grpc_resolver_factory *factory, grpc_resolver_args *args) {           \
+      grpc_exec_ctx *exec_ctx, grpc_resolver_factory *factory,              \
+      grpc_resolver_args *args) {                                           \
     return sockaddr_create(args, parse_##name);                             \
   }                                                                         \
   static const grpc_resolver_factory_vtable name##_factory_vtable = {       \
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.c b/src/core/ext/transport/chttp2/client/chttp2_connector.c
new file mode 100644
index 0000000000..114bb07222
--- /dev/null
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.c
@@ -0,0 +1,264 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/ext/transport/chttp2/client/chttp2_connector.h"
+
+#include <grpc/grpc.h>
+
+#include <string.h>
+
+#include <grpc/slice_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/ext/client_channel/connector.h"
+#include "src/core/ext/client_channel/http_connect_handshaker.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/security/transport/security_connector.h"
+
+typedef struct {
+  grpc_connector base;
+
+  gpr_mu mu;
+  gpr_refcount refs;
+
+  bool shutdown;
+  bool connecting;
+
+  grpc_chttp2_add_handshakers_func add_handshakers;
+  void *add_handshakers_user_data;
+
+  grpc_closure *notify;
+  grpc_connect_in_args args;
+  grpc_connect_out_args *result;
+  grpc_closure initial_string_sent;
+  grpc_slice_buffer initial_string_buffer;
+
+  grpc_endpoint *endpoint;  // Non-NULL until handshaking starts.
+
+  grpc_closure connected;
+
+  grpc_handshake_manager *handshake_mgr;
+} chttp2_connector;
+
+static void chttp2_connector_ref(grpc_connector *con) {
+  chttp2_connector *c = (chttp2_connector *)con;
+  gpr_ref(&c->refs);
+}
+
+static void chttp2_connector_unref(grpc_exec_ctx *exec_ctx,
+                                   grpc_connector *con) {
+  chttp2_connector *c = (chttp2_connector *)con;
+  if (gpr_unref(&c->refs)) {
+    /* c->initial_string_buffer does not need to be destroyed */
+    gpr_mu_destroy(&c->mu);
+    // If handshaking is not yet in progress, destroy the endpoint.
+    // Otherwise, the handshaker will do this for us.
+    if (c->endpoint != NULL) grpc_endpoint_destroy(exec_ctx, c->endpoint);
+    gpr_free(c);
+  }
+}
+
+static void chttp2_connector_shutdown(grpc_exec_ctx *exec_ctx,
+                                      grpc_connector *con) {
+  chttp2_connector *c = (chttp2_connector *)con;
+  gpr_mu_lock(&c->mu);
+  c->shutdown = true;
+  if (c->handshake_mgr != NULL) {
+    grpc_handshake_manager_shutdown(exec_ctx, c->handshake_mgr);
+  }
+  // If handshaking is not yet in progress, shutdown the endpoint.
+  // Otherwise, the handshaker will do this for us.
+  if (!c->connecting && c->endpoint != NULL) {
+    grpc_endpoint_shutdown(exec_ctx, c->endpoint);
+  }
+  gpr_mu_unlock(&c->mu);
+}
+
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
+                              grpc_error *error) {
+  grpc_handshaker_args *args = arg;
+  chttp2_connector *c = args->user_data;
+  gpr_mu_lock(&c->mu);
+  if (error != GRPC_ERROR_NONE || c->shutdown) {
+    if (error == GRPC_ERROR_NONE) {
+      error = GRPC_ERROR_CREATE("connector shutdown");
+      // We were shut down after handshaking completed successfully, so
+      // destroy the endpoint here.
+      // TODO(ctiller): It is currently necessary to shutdown endpoints
+      // before destroying them, even if we know that there are no
+      // pending read/write callbacks.  This should be fixed, at which
+      // point this can be removed.
+      grpc_endpoint_shutdown(exec_ctx, args->endpoint);
+      grpc_endpoint_destroy(exec_ctx, args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy(args->read_buffer);
+      gpr_free(args->read_buffer);
+    } else {
+      error = GRPC_ERROR_REF(error);
+    }
+    memset(c->result, 0, sizeof(*c->result));
+  } else {
+    c->result->transport =
+        grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 1);
+    GPR_ASSERT(c->result->transport);
+    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport,
+                                        args->read_buffer);
+    c->result->channel_args = args->args;
+  }
+  grpc_closure *notify = c->notify;
+  c->notify = NULL;
+  grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
+  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
+  c->handshake_mgr = NULL;
+  gpr_mu_unlock(&c->mu);
+  chttp2_connector_unref(exec_ctx, (grpc_connector *)c);
+}
+
+static void start_handshake_locked(grpc_exec_ctx *exec_ctx,
+                                   chttp2_connector *c) {
+  c->handshake_mgr = grpc_handshake_manager_create();
+  char *proxy_name = grpc_get_http_proxy_server();
+  if (proxy_name != NULL) {
+    grpc_handshake_manager_add(c->handshake_mgr,
+                               grpc_http_connect_handshaker_create(proxy_name));
+    gpr_free(proxy_name);
+  }
+  if (c->add_handshakers != NULL) {
+    c->add_handshakers(exec_ctx, c->add_handshakers_user_data,
+                       c->handshake_mgr);
+  }
+  grpc_handshake_manager_do_handshake(
+      exec_ctx, c->handshake_mgr, c->endpoint, c->args.channel_args,
+      c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
+  c->endpoint = NULL;  // Endpoint handed off to handshake manager.
+}
+
+static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
+                                           grpc_error *error) {
+  chttp2_connector *c = arg;
+  gpr_mu_lock(&c->mu);
+  if (error != GRPC_ERROR_NONE || c->shutdown) {
+    if (error == GRPC_ERROR_NONE) {
+      error = GRPC_ERROR_CREATE("connector shutdown");
+    } else {
+      error = GRPC_ERROR_REF(error);
+    }
+    memset(c->result, 0, sizeof(*c->result));
+    grpc_closure *notify = c->notify;
+    c->notify = NULL;
+    grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
+    gpr_mu_unlock(&c->mu);
+    chttp2_connector_unref(exec_ctx, arg);
+  } else {
+    start_handshake_locked(exec_ctx, c);
+    gpr_mu_unlock(&c->mu);
+  }
+}
+
+static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
+  chttp2_connector *c = arg;
+  gpr_mu_lock(&c->mu);
+  GPR_ASSERT(c->connecting);
+  c->connecting = false;
+  if (error != GRPC_ERROR_NONE || c->shutdown) {
+    if (error == GRPC_ERROR_NONE) {
+      error = GRPC_ERROR_CREATE("connector shutdown");
+    } else {
+      error = GRPC_ERROR_REF(error);
+    }
+    memset(c->result, 0, sizeof(*c->result));
+    grpc_closure *notify = c->notify;
+    c->notify = NULL;
+    grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
+    if (c->endpoint != NULL) grpc_endpoint_shutdown(exec_ctx, c->endpoint);
+    gpr_mu_unlock(&c->mu);
+    chttp2_connector_unref(exec_ctx, arg);
+  } else {
+    GPR_ASSERT(c->endpoint != NULL);
+    if (!GRPC_SLICE_IS_EMPTY(c->args.initial_connect_string)) {
+      grpc_closure_init(&c->initial_string_sent, on_initial_connect_string_sent,
+                        c);
+      grpc_slice_buffer_init(&c->initial_string_buffer);
+      grpc_slice_buffer_add(&c->initial_string_buffer,
+                            c->args.initial_connect_string);
+      grpc_endpoint_write(exec_ctx, c->endpoint, &c->initial_string_buffer,
+                          &c->initial_string_sent);
+    } else {
+      start_handshake_locked(exec_ctx, c);
+    }
+    gpr_mu_unlock(&c->mu);
+  }
+}
+
+static void chttp2_connector_connect(grpc_exec_ctx *exec_ctx,
+                                     grpc_connector *con,
+                                     const grpc_connect_in_args *args,
+                                     grpc_connect_out_args *result,
+                                     grpc_closure *notify) {
+  chttp2_connector *c = (chttp2_connector *)con;
+  gpr_mu_lock(&c->mu);
+  GPR_ASSERT(c->notify == NULL);
+  c->notify = notify;
+  c->args = *args;
+  c->result = result;
+  GPR_ASSERT(c->endpoint == NULL);
+  chttp2_connector_ref(con);  // Ref taken for callback.
+  grpc_closure_init(&c->connected, connected, c);
+  GPR_ASSERT(!c->connecting);
+  c->connecting = true;
+  grpc_tcp_client_connect(exec_ctx, &c->connected, &c->endpoint,
+                          args->interested_parties, args->channel_args,
+                          args->addr, args->deadline);
+  gpr_mu_unlock(&c->mu);
+}
+
+static const grpc_connector_vtable chttp2_connector_vtable = {
+    chttp2_connector_ref, chttp2_connector_unref, chttp2_connector_shutdown,
+    chttp2_connector_connect};
+
+grpc_connector *grpc_chttp2_connector_create(
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_add_handshakers_func add_handshakers,
+    void *add_handshakers_user_data) {
+  chttp2_connector *c = gpr_malloc(sizeof(*c));
+  memset(c, 0, sizeof(*c));
+  c->base.vtable = &chttp2_connector_vtable;
+  gpr_mu_init(&c->mu);
+  gpr_ref_init(&c->refs, 1);
+  c->add_handshakers = add_handshakers;
+  c->add_handshakers_user_data = add_handshakers_user_data;
+  return &c->base;
+}
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.h b/src/core/ext/transport/chttp2/client/chttp2_connector.h
new file mode 100644
index 0000000000..58eba22417
--- /dev/null
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.h
@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_CLIENT_CHTTP2_CONNECTOR_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_CLIENT_CHTTP2_CONNECTOR_H
+
+#include "src/core/ext/client_channel/connector.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+typedef void (*grpc_chttp2_add_handshakers_func)(
+    grpc_exec_ctx* exec_ctx, void* user_data,
+    grpc_handshake_manager* handshake_mgr);
+
+/// If \a add_handshakers is non-NULL, it will be called with
+/// \a add_handshakers_user_data to add handshakers.
+grpc_connector* grpc_chttp2_connector_create(
+    grpc_exec_ctx* exec_ctx, grpc_chttp2_add_handshakers_func add_handshakers,
+    void* add_handshakers_user_data);
+
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_CLIENT_CHTTP2_CONNECTOR_H */
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.c b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
index 71a06e118b..a0d0652ce7 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
@@ -33,138 +33,17 @@
 
 #include <grpc/grpc.h>
 
-#include <stdlib.h>
 #include <string.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
+#include <grpc/support/string_util.h>
 
 #include "src/core/ext/client_channel/client_channel.h"
-#include "src/core/ext/client_channel/http_connect_handshaker.h"
-#include "src/core/ext/client_channel/resolver_registry.h"
-#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/client/chttp2_connector.h"
 #include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/channel/compress_filter.h"
-#include "src/core/lib/channel/handshaker.h"
-#include "src/core/lib/channel/http_client_filter.h"
-#include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/channel.h"
 
-//
-// connector
-//
-
-typedef struct {
-  grpc_connector base;
-  gpr_refcount refs;
-
-  grpc_closure *notify;
-  grpc_connect_in_args args;
-  grpc_connect_out_args *result;
-  grpc_closure initial_string_sent;
-  gpr_slice_buffer initial_string_buffer;
-
-  grpc_endpoint *tcp;
-
-  grpc_closure connected;
-
-  grpc_handshake_manager *handshake_mgr;
-} connector;
-
-static void connector_ref(grpc_connector *con) {
-  connector *c = (connector *)con;
-  gpr_ref(&c->refs);
-}
-
-static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
-  connector *c = (connector *)con;
-  if (gpr_unref(&c->refs)) {
-    /* c->initial_string_buffer does not need to be destroyed */
-    grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
-    gpr_free(c);
-  }
-}
-
-static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
-                                           grpc_error *error) {
-  connector_unref(exec_ctx, arg);
-}
-
-static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
-                              grpc_channel_args *args,
-                              gpr_slice_buffer *read_buffer, void *user_data,
-                              grpc_error *error) {
-  connector *c = user_data;
-  if (error != GRPC_ERROR_NONE) {
-    grpc_channel_args_destroy(args);
-    gpr_free(read_buffer);
-  } else {
-    c->result->transport =
-        grpc_create_chttp2_transport(exec_ctx, args, endpoint, 1);
-    GPR_ASSERT(c->result->transport);
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport,
-                                        read_buffer);
-    c->result->channel_args = args;
-  }
-  grpc_closure *notify = c->notify;
-  c->notify = NULL;
-  grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
-}
-
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  connector *c = arg;
-  grpc_endpoint *tcp = c->tcp;
-  if (tcp != NULL) {
-    if (!GPR_SLICE_IS_EMPTY(c->args.initial_connect_string)) {
-      grpc_closure_init(&c->initial_string_sent, on_initial_connect_string_sent,
-                        c);
-      gpr_slice_buffer_init(&c->initial_string_buffer);
-      gpr_slice_buffer_add(&c->initial_string_buffer,
-                           c->args.initial_connect_string);
-      connector_ref(arg);
-      grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer,
-                          &c->initial_string_sent);
-    } else {
-      grpc_handshake_manager_do_handshake(
-          exec_ctx, c->handshake_mgr, tcp, c->args.channel_args,
-          c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
-    }
-  } else {
-    memset(c->result, 0, sizeof(*c->result));
-    grpc_closure *notify = c->notify;
-    c->notify = NULL;
-    grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL);
-  }
-}
-
-static void connector_shutdown(grpc_exec_ctx *exec_ctx, grpc_connector *con) {}
-
-static void connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *con,
-                              const grpc_connect_in_args *args,
-                              grpc_connect_out_args *result,
-                              grpc_closure *notify) {
-  connector *c = (connector *)con;
-  GPR_ASSERT(c->notify == NULL);
-  GPR_ASSERT(notify->cb);
-  c->notify = notify;
-  c->args = *args;
-  c->result = result;
-  c->tcp = NULL;
-  grpc_closure_init(&c->connected, connected, c);
-  grpc_tcp_client_connect(exec_ctx, &c->connected, &c->tcp,
-                          args->interested_parties, args->channel_args,
-                          args->addr, args->deadline);
-}
-
-static const grpc_connector_vtable connector_vtable = {
-    connector_ref, connector_unref, connector_shutdown, connector_connect};
-
-//
-// client_channel_factory
-//
-
 static void client_channel_factory_ref(
     grpc_client_channel_factory *cc_factory) {}
 
@@ -174,20 +53,10 @@ static void client_channel_factory_unref(
 static grpc_subchannel *client_channel_factory_create_subchannel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const grpc_subchannel_args *args) {
-  connector *c = gpr_malloc(sizeof(*c));
-  memset(c, 0, sizeof(*c));
-  c->base.vtable = &connector_vtable;
-  gpr_ref_init(&c->refs, 1);
-  c->handshake_mgr = grpc_handshake_manager_create();
-  char *proxy_name = grpc_get_http_proxy_server();
-  if (proxy_name != NULL) {
-    grpc_handshake_manager_add(
-        c->handshake_mgr,
-        grpc_http_connect_handshaker_create(proxy_name, args->server_name));
-    gpr_free(proxy_name);
-  }
-  grpc_subchannel *s = grpc_subchannel_create(exec_ctx, &c->base, args);
-  grpc_connector_unref(exec_ctx, &c->base);
+  grpc_connector *connector = grpc_chttp2_connector_create(
+      exec_ctx, NULL /* add_handshakers */, NULL /* user_data */);
+  grpc_subchannel *s = grpc_subchannel_create(exec_ctx, connector, args);
+  grpc_connector_unref(exec_ctx, connector);
   return s;
 }
 
@@ -195,19 +64,15 @@ static grpc_channel *client_channel_factory_create_channel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const char *target, grpc_client_channel_type type,
     const grpc_channel_args *args) {
-  grpc_channel *channel =
-      grpc_channel_create(exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL);
-  grpc_resolver *resolver = grpc_resolver_create(target, args);
-  if (!resolver) {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel,
-                                "client_channel_factory_create_channel");
-    return NULL;
-  }
-
-  grpc_client_channel_finish_initialization(
-      exec_ctx, grpc_channel_get_channel_stack(channel), resolver, cc_factory);
-  GRPC_RESOLVER_UNREF(exec_ctx, resolver, "create_channel");
-
+  // Add channel arg containing the server URI.
+  grpc_arg arg;
+  arg.type = GRPC_ARG_STRING;
+  arg.key = GRPC_ARG_SERVER_URI;
+  arg.value.string = (char *)target;
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
+  grpc_channel *channel = grpc_channel_create(exec_ctx, target, new_args,
+                                              GRPC_CLIENT_CHANNEL, NULL);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -230,16 +95,19 @@ grpc_channel *grpc_insecure_channel_create(const char *target,
   GRPC_API_TRACE(
       "grpc_insecure_channel_create(target=%p, args=%p, reserved=%p)", 3,
       (target, args, reserved));
-  GPR_ASSERT(!reserved);
-
+  GPR_ASSERT(reserved == NULL);
   grpc_client_channel_factory *factory =
       (grpc_client_channel_factory *)&client_channel_factory;
+  // Add channel arg containing the client channel factory.
+  grpc_arg arg = grpc_client_channel_factory_create_channel_arg(factory);
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
+  // Create channel.
   grpc_channel *channel = client_channel_factory_create_channel(
-      &exec_ctx, factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, args);
-
+      &exec_ctx, factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+  // Clean up.
+  grpc_channel_args_destroy(new_args);
   grpc_client_channel_factory_unref(&exec_ctx, factory);
   grpc_exec_ctx_finish(&exec_ctx);
-
   return channel != NULL ? channel : grpc_lame_client_channel_create(
                                          target, GRPC_STATUS_INTERNAL,
                                          "Failed to create client channel");
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
index 57e1a8ec01..f35439cd44 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
@@ -33,196 +33,18 @@
 
 #include <grpc/grpc.h>
 
-#include <stdlib.h>
 #include <string.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
+#include <grpc/support/string_util.h>
 
 #include "src/core/ext/client_channel/client_channel.h"
-#include "src/core/ext/client_channel/http_connect_handshaker.h"
-#include "src/core/ext/client_channel/resolver_registry.h"
-#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/client/chttp2_connector.h"
 #include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/channel/handshaker.h"
-#include "src/core/lib/iomgr/tcp_client.h"
-#include "src/core/lib/security/context/security_context.h"
 #include "src/core/lib/security/credentials/credentials.h"
-#include "src/core/lib/security/transport/auth_filters.h"
+#include "src/core/lib/security/transport/security_connector.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/channel.h"
-#include "src/core/lib/tsi/transport_security_interface.h"
-
-//
-// connector
-//
-
-typedef struct {
-  grpc_connector base;
-  gpr_refcount refs;
-
-  grpc_channel_security_connector *security_connector;
-
-  grpc_closure *notify;
-  grpc_connect_in_args args;
-  grpc_connect_out_args *result;
-  grpc_closure initial_string_sent;
-  gpr_slice_buffer initial_string_buffer;
-
-  gpr_mu mu;
-  grpc_endpoint *connecting_endpoint;
-  grpc_endpoint *newly_connecting_endpoint;
-
-  grpc_closure connected_closure;
-
-  grpc_handshake_manager *handshake_mgr;
-
-  // TODO(roth): Remove once we eliminate on_secure_handshake_done().
-  grpc_channel_args *tmp_args;
-} connector;
-
-static void connector_ref(grpc_connector *con) {
-  connector *c = (connector *)con;
-  gpr_ref(&c->refs);
-}
-
-static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
-  connector *c = (connector *)con;
-  if (gpr_unref(&c->refs)) {
-    /* c->initial_string_buffer does not need to be destroyed */
-    grpc_channel_args_destroy(c->tmp_args);
-    grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
-    gpr_free(c);
-  }
-}
-
-static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
-                                     grpc_security_status status,
-                                     grpc_endpoint *secure_endpoint,
-                                     grpc_auth_context *auth_context) {
-  connector *c = arg;
-  gpr_mu_lock(&c->mu);
-  grpc_error *error = GRPC_ERROR_NONE;
-  if (c->connecting_endpoint == NULL) {
-    memset(c->result, 0, sizeof(*c->result));
-    gpr_mu_unlock(&c->mu);
-  } else if (status != GRPC_SECURITY_OK) {
-    error = grpc_error_set_int(GRPC_ERROR_CREATE("Secure handshake failed"),
-                               GRPC_ERROR_INT_SECURITY_STATUS, status);
-    memset(c->result, 0, sizeof(*c->result));
-    c->connecting_endpoint = NULL;
-    gpr_mu_unlock(&c->mu);
-  } else {
-    grpc_arg auth_context_arg;
-    c->connecting_endpoint = NULL;
-    gpr_mu_unlock(&c->mu);
-    c->result->transport = grpc_create_chttp2_transport(
-        exec_ctx, c->args.channel_args, secure_endpoint, 1);
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL);
-    auth_context_arg = grpc_auth_context_to_arg(auth_context);
-    c->result->channel_args =
-        grpc_channel_args_copy_and_add(c->tmp_args, &auth_context_arg, 1);
-  }
-  grpc_closure *notify = c->notify;
-  c->notify = NULL;
-  grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
-}
-
-static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
-                              grpc_channel_args *args,
-                              gpr_slice_buffer *read_buffer, void *user_data,
-                              grpc_error *error) {
-  connector *c = user_data;
-  c->tmp_args = args;
-  if (error != GRPC_ERROR_NONE) {
-    gpr_free(read_buffer);
-    grpc_closure *notify = c->notify;
-    c->notify = NULL;
-    grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
-  } else {
-    // TODO(roth, jboeuf): Convert security connector handshaking to use new
-    // handshake API, and then move the code from on_secure_handshake_done()
-    // into this function.
-    grpc_channel_security_connector_do_handshake(
-        exec_ctx, c->security_connector, endpoint, read_buffer,
-        c->args.deadline, on_secure_handshake_done, c);
-  }
-}
-
-static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
-                                           grpc_error *error) {
-  connector *c = arg;
-  grpc_handshake_manager_do_handshake(
-      exec_ctx, c->handshake_mgr, c->connecting_endpoint, c->args.channel_args,
-      c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
-}
-
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  connector *c = arg;
-  grpc_endpoint *tcp = c->newly_connecting_endpoint;
-  if (tcp != NULL) {
-    gpr_mu_lock(&c->mu);
-    GPR_ASSERT(c->connecting_endpoint == NULL);
-    c->connecting_endpoint = tcp;
-    gpr_mu_unlock(&c->mu);
-    if (!GPR_SLICE_IS_EMPTY(c->args.initial_connect_string)) {
-      grpc_closure_init(&c->initial_string_sent, on_initial_connect_string_sent,
-                        c);
-      gpr_slice_buffer_init(&c->initial_string_buffer);
-      gpr_slice_buffer_add(&c->initial_string_buffer,
-                           c->args.initial_connect_string);
-      grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer,
-                          &c->initial_string_sent);
-    } else {
-      grpc_handshake_manager_do_handshake(
-          exec_ctx, c->handshake_mgr, tcp, c->args.channel_args,
-          c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
-    }
-  } else {
-    memset(c->result, 0, sizeof(*c->result));
-    grpc_closure *notify = c->notify;
-    c->notify = NULL;
-    grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL);
-  }
-}
-
-static void connector_shutdown(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
-  connector *c = (connector *)con;
-  grpc_endpoint *ep;
-  gpr_mu_lock(&c->mu);
-  ep = c->connecting_endpoint;
-  c->connecting_endpoint = NULL;
-  gpr_mu_unlock(&c->mu);
-  if (ep) {
-    grpc_endpoint_shutdown(exec_ctx, ep);
-  }
-}
-
-static void connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *con,
-                              const grpc_connect_in_args *args,
-                              grpc_connect_out_args *result,
-                              grpc_closure *notify) {
-  connector *c = (connector *)con;
-  GPR_ASSERT(c->notify == NULL);
-  c->notify = notify;
-  c->args = *args;
-  c->result = result;
-  gpr_mu_lock(&c->mu);
-  GPR_ASSERT(c->connecting_endpoint == NULL);
-  gpr_mu_unlock(&c->mu);
-  grpc_closure_init(&c->connected_closure, connected, c);
-  grpc_tcp_client_connect(
-      exec_ctx, &c->connected_closure, &c->newly_connecting_endpoint,
-      args->interested_parties, args->channel_args, args->addr, args->deadline);
-}
-
-static const grpc_connector_vtable connector_vtable = {
-    connector_ref, connector_unref, connector_shutdown, connector_connect};
-
-//
-// client_channel_factory
-//
 
 typedef struct {
   grpc_client_channel_factory base;
@@ -246,26 +68,20 @@ static void client_channel_factory_unref(
   }
 }
 
+static void add_handshakers(grpc_exec_ctx *exec_ctx, void *security_connector,
+                            grpc_handshake_manager *handshake_mgr) {
+  grpc_channel_security_connector_add_handshakers(exec_ctx, security_connector,
+                                                  handshake_mgr);
+}
+
 static grpc_subchannel *client_channel_factory_create_subchannel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const grpc_subchannel_args *args) {
   client_channel_factory *f = (client_channel_factory *)cc_factory;
-  connector *c = gpr_malloc(sizeof(*c));
-  memset(c, 0, sizeof(*c));
-  c->base.vtable = &connector_vtable;
-  c->security_connector = f->security_connector;
-  c->handshake_mgr = grpc_handshake_manager_create();
-  char *proxy_name = grpc_get_http_proxy_server();
-  if (proxy_name != NULL) {
-    grpc_handshake_manager_add(
-        c->handshake_mgr,
-        grpc_http_connect_handshaker_create(proxy_name, args->server_name));
-    gpr_free(proxy_name);
-  }
-  gpr_mu_init(&c->mu);
-  gpr_ref_init(&c->refs, 1);
-  grpc_subchannel *s = grpc_subchannel_create(exec_ctx, &c->base, args);
-  grpc_connector_unref(exec_ctx, &c->base);
+  grpc_connector *connector = grpc_chttp2_connector_create(
+      exec_ctx, add_handshakers, f->security_connector);
+  grpc_subchannel *s = grpc_subchannel_create(exec_ctx, connector, args);
+  grpc_connector_unref(exec_ctx, connector);
   return s;
 }
 
@@ -273,19 +89,15 @@ static grpc_channel *client_channel_factory_create_channel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const char *target, grpc_client_channel_type type,
     const grpc_channel_args *args) {
-  client_channel_factory *f = (client_channel_factory *)cc_factory;
-  grpc_channel *channel =
-      grpc_channel_create(exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL);
-  grpc_resolver *resolver = grpc_resolver_create(target, args);
-  if (resolver != NULL) {
-    grpc_client_channel_finish_initialization(
-        exec_ctx, grpc_channel_get_channel_stack(channel), resolver, &f->base);
-    GRPC_RESOLVER_UNREF(exec_ctx, resolver, "create");
-  } else {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel,
-                                "client_channel_factory_create_channel");
-    channel = NULL;
-  }
+  // Add channel arg containing the server URI.
+  grpc_arg arg;
+  arg.type = GRPC_ARG_STRING;
+  arg.key = GRPC_ARG_SERVER_URI;
+  arg.value.string = (char *)target;
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
+  grpc_channel *channel = grpc_channel_create(exec_ctx, target, new_args,
+                                              GRPC_CLIENT_CHANNEL, NULL);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -326,14 +138,6 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
     return grpc_lame_client_channel_create(
         target, GRPC_STATUS_INTERNAL, "Failed to create security connector.");
   }
-  grpc_arg connector_arg =
-      grpc_security_connector_to_arg(&security_connector->base);
-  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(
-      new_args_from_connector != NULL ? new_args_from_connector : args,
-      &connector_arg, 1);
-  if (new_args_from_connector != NULL) {
-    grpc_channel_args_destroy(new_args_from_connector);
-  }
   // Create client channel factory.
   client_channel_factory *f = gpr_malloc(sizeof(*f));
   memset(f, 0, sizeof(*f));
@@ -342,13 +146,24 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
   GRPC_SECURITY_CONNECTOR_REF(&security_connector->base,
                               "grpc_secure_channel_create");
   f->security_connector = security_connector;
+  // Add channel args containing the client channel factory and security
+  // connector.
+  grpc_arg new_args[2];
+  new_args[0] = grpc_client_channel_factory_create_channel_arg(&f->base);
+  new_args[1] = grpc_security_connector_to_arg(&security_connector->base);
+  grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
+      new_args_from_connector != NULL ? new_args_from_connector : args,
+      new_args, GPR_ARRAY_SIZE(new_args));
+  if (new_args_from_connector != NULL) {
+    grpc_channel_args_destroy(new_args_from_connector);
+  }
   // Create channel.
   grpc_channel *channel = client_channel_factory_create_channel(
-      &exec_ctx, &f->base, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+      &exec_ctx, &f->base, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, args_copy);
   // Clean up.
   GRPC_SECURITY_CONNECTOR_UNREF(&f->security_connector->base,
-                                "client_channel_factory_create_channel");
-  grpc_channel_args_destroy(new_args);
+                                "secure_client_channel_factory_create_channel");
+  grpc_channel_args_destroy(args_copy);
   grpc_client_channel_factory_unref(&exec_ctx, &f->base);
   grpc_exec_ctx_finish(&exec_ctx);
   return channel; /* may be NULL */
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.c b/src/core/ext/transport/chttp2/server/chttp2_server.c
new file mode 100644
index 0000000000..f0857714fc
--- /dev/null
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.c
@@ -0,0 +1,362 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/ext/transport/chttp2/server/chttp2_server.h"
+
+#include <grpc/grpc.h>
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/channel/http_server_filter.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/server.h"
+
+void grpc_chttp2_server_handshaker_factory_add_handshakers(
+    grpc_exec_ctx *exec_ctx,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory,
+    grpc_handshake_manager *handshake_mgr) {
+  if (handshaker_factory != NULL) {
+    handshaker_factory->vtable->add_handshakers(exec_ctx, handshaker_factory,
+                                                handshake_mgr);
+  }
+}
+
+void grpc_chttp2_server_handshaker_factory_destroy(
+    grpc_exec_ctx *exec_ctx,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory) {
+  if (handshaker_factory != NULL) {
+    handshaker_factory->vtable->destroy(exec_ctx, handshaker_factory);
+  }
+}
+
+typedef struct pending_handshake_manager_node {
+  grpc_handshake_manager *handshake_mgr;
+  struct pending_handshake_manager_node *next;
+} pending_handshake_manager_node;
+
+typedef struct {
+  grpc_server *server;
+  grpc_tcp_server *tcp_server;
+  grpc_channel_args *args;
+  grpc_chttp2_server_handshaker_factory *handshaker_factory;
+  gpr_mu mu;
+  bool shutdown;
+  grpc_closure tcp_server_shutdown_complete;
+  grpc_closure *server_destroy_listener_done;
+  pending_handshake_manager_node *pending_handshake_mgrs;
+} server_state;
+
+typedef struct {
+  server_state *server_state;
+  grpc_pollset *accepting_pollset;
+  grpc_tcp_server_acceptor *acceptor;
+  grpc_handshake_manager *handshake_mgr;
+} server_connection_state;
+
+static void pending_handshake_manager_add_locked(
+    server_state *state, grpc_handshake_manager *handshake_mgr) {
+  pending_handshake_manager_node *node = gpr_malloc(sizeof(*node));
+  node->handshake_mgr = handshake_mgr;
+  node->next = state->pending_handshake_mgrs;
+  state->pending_handshake_mgrs = node;
+}
+
+static void pending_handshake_manager_remove_locked(
+    server_state *state, grpc_handshake_manager *handshake_mgr) {
+  pending_handshake_manager_node **prev_node = &state->pending_handshake_mgrs;
+  for (pending_handshake_manager_node *node = state->pending_handshake_mgrs;
+       node != NULL; node = node->next) {
+    if (node->handshake_mgr == handshake_mgr) {
+      *prev_node = node->next;
+      gpr_free(node);
+      break;
+    }
+    prev_node = &node->next;
+  }
+}
+
+static void pending_handshake_manager_shutdown_locked(grpc_exec_ctx *exec_ctx,
+                                                      server_state *state) {
+  pending_handshake_manager_node *prev_node = NULL;
+  for (pending_handshake_manager_node *node = state->pending_handshake_mgrs;
+       node != NULL; node = node->next) {
+    grpc_handshake_manager_shutdown(exec_ctx, node->handshake_mgr);
+    gpr_free(prev_node);
+    prev_node = node;
+  }
+  gpr_free(prev_node);
+  state->pending_handshake_mgrs = NULL;
+}
+
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
+                              grpc_error *error) {
+  grpc_handshaker_args *args = arg;
+  server_connection_state *connection_state = args->user_data;
+  gpr_mu_lock(&connection_state->server_state->mu);
+  if (error != GRPC_ERROR_NONE || connection_state->server_state->shutdown) {
+    const char *error_str = grpc_error_string(error);
+    gpr_log(GPR_ERROR, "Handshaking failed: %s", error_str);
+    grpc_error_free_string(error_str);
+    if (error == GRPC_ERROR_NONE && args->endpoint != NULL) {
+      // We were shut down after handshaking completed successfully, so
+      // destroy the endpoint here.
+      // TODO(ctiller): It is currently necessary to shutdown endpoints
+      // before destroying them, even if we know that there are no
+      // pending read/write callbacks.  This should be fixed, at which
+      // point this can be removed.
+      grpc_endpoint_shutdown(exec_ctx, args->endpoint);
+      grpc_endpoint_destroy(exec_ctx, args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy(args->read_buffer);
+      gpr_free(args->read_buffer);
+    }
+  } else {
+    // If the handshaking succeeded but there is no endpoint, then the
+    // handshaker may have handed off the connection to some external
+    // code, so we can just clean up here without creating a transport.
+    if (args->endpoint != NULL) {
+      grpc_transport *transport =
+          grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 0);
+      grpc_server_setup_transport(
+          exec_ctx, connection_state->server_state->server, transport,
+          connection_state->accepting_pollset, args->args);
+      grpc_chttp2_transport_start_reading(exec_ctx, transport,
+                                          args->read_buffer);
+      grpc_channel_args_destroy(args->args);
+    }
+  }
+  pending_handshake_manager_remove_locked(connection_state->server_state,
+                                          connection_state->handshake_mgr);
+  gpr_mu_unlock(&connection_state->server_state->mu);
+  grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
+  grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp_server);
+  gpr_free(connection_state->acceptor);
+  gpr_free(connection_state);
+}
+
+static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
+                      grpc_pollset *accepting_pollset,
+                      grpc_tcp_server_acceptor *acceptor) {
+  server_state *state = arg;
+  gpr_mu_lock(&state->mu);
+  if (state->shutdown) {
+    gpr_mu_unlock(&state->mu);
+    grpc_endpoint_destroy(exec_ctx, tcp);
+    gpr_free(acceptor);
+    return;
+  }
+  grpc_handshake_manager *handshake_mgr = grpc_handshake_manager_create();
+  pending_handshake_manager_add_locked(state, handshake_mgr);
+  gpr_mu_unlock(&state->mu);
+  grpc_tcp_server_ref(state->tcp_server);
+  server_connection_state *connection_state =
+      gpr_malloc(sizeof(*connection_state));
+  connection_state->server_state = state;
+  connection_state->accepting_pollset = accepting_pollset;
+  connection_state->acceptor = acceptor;
+  connection_state->handshake_mgr = handshake_mgr;
+  grpc_chttp2_server_handshaker_factory_add_handshakers(
+      exec_ctx, state->handshaker_factory, connection_state->handshake_mgr);
+  // TODO(roth): We should really get this timeout value from channel
+  // args instead of hard-coding it.
+  const gpr_timespec deadline = gpr_time_add(
+      gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(120, GPR_TIMESPAN));
+  grpc_handshake_manager_do_handshake(exec_ctx, connection_state->handshake_mgr,
+                                      tcp, state->args, deadline, acceptor,
+                                      on_handshake_done, connection_state);
+}
+
+/* Server callback: start listening on our ports */
+static void server_start_listener(grpc_exec_ctx *exec_ctx, grpc_server *server,
+                                  void *arg, grpc_pollset **pollsets,
+                                  size_t pollset_count) {
+  server_state *state = arg;
+  gpr_mu_lock(&state->mu);
+  state->shutdown = false;
+  gpr_mu_unlock(&state->mu);
+  grpc_tcp_server_start(exec_ctx, state->tcp_server, pollsets, pollset_count,
+                        on_accept, state);
+}
+
+static void tcp_server_shutdown_complete(grpc_exec_ctx *exec_ctx, void *arg,
+                                         grpc_error *error) {
+  server_state *state = arg;
+  /* ensure all threads have unlocked */
+  gpr_mu_lock(&state->mu);
+  grpc_closure *destroy_done = state->server_destroy_listener_done;
+  GPR_ASSERT(state->shutdown);
+  pending_handshake_manager_shutdown_locked(exec_ctx, state);
+  gpr_mu_unlock(&state->mu);
+  // Flush queued work before destroying handshaker factory, since that
+  // may do a synchronous unref.
+  grpc_exec_ctx_flush(exec_ctx);
+  grpc_chttp2_server_handshaker_factory_destroy(exec_ctx,
+                                                state->handshaker_factory);
+  if (destroy_done != NULL) {
+    destroy_done->cb(exec_ctx, destroy_done->cb_arg, GRPC_ERROR_REF(error));
+    grpc_exec_ctx_flush(exec_ctx);
+  }
+  grpc_channel_args_destroy(state->args);
+  gpr_mu_destroy(&state->mu);
+  gpr_free(state);
+}
+
+/* Server callback: destroy the tcp listener (so we don't generate further
+   callbacks) */
+static void server_destroy_listener(grpc_exec_ctx *exec_ctx,
+                                    grpc_server *server, void *arg,
+                                    grpc_closure *destroy_done) {
+  server_state *state = arg;
+  gpr_mu_lock(&state->mu);
+  state->shutdown = true;
+  state->server_destroy_listener_done = destroy_done;
+  grpc_tcp_server *tcp_server = state->tcp_server;
+  gpr_mu_unlock(&state->mu);
+  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp_server);
+  grpc_tcp_server_unref(exec_ctx, tcp_server);
+}
+
+grpc_error *grpc_chttp2_server_add_port(
+    grpc_exec_ctx *exec_ctx, grpc_server *server, const char *addr,
+    grpc_channel_args *args,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory, int *port_num) {
+  grpc_resolved_addresses *resolved = NULL;
+  grpc_tcp_server *tcp_server = NULL;
+  size_t i;
+  size_t count = 0;
+  int port_temp;
+  grpc_error *err = GRPC_ERROR_NONE;
+  server_state *state = NULL;
+  grpc_error **errors = NULL;
+
+  *port_num = -1;
+
+  /* resolve address */
+  err = grpc_blocking_resolve_address(addr, "https", &resolved);
+  if (err != GRPC_ERROR_NONE) {
+    goto error;
+  }
+  state = gpr_malloc(sizeof(*state));
+  memset(state, 0, sizeof(*state));
+  grpc_closure_init(&state->tcp_server_shutdown_complete,
+                    tcp_server_shutdown_complete, state);
+  err = grpc_tcp_server_create(exec_ctx, &state->tcp_server_shutdown_complete,
+                               args, &tcp_server);
+  if (err != GRPC_ERROR_NONE) {
+    goto error;
+  }
+
+  state->server = server;
+  state->tcp_server = tcp_server;
+  state->args = args;
+  state->handshaker_factory = handshaker_factory;
+  state->shutdown = true;
+  gpr_mu_init(&state->mu);
+
+  const size_t naddrs = resolved->naddrs;
+  errors = gpr_malloc(sizeof(*errors) * naddrs);
+  for (i = 0; i < naddrs; i++) {
+    errors[i] =
+        grpc_tcp_server_add_port(tcp_server, &resolved->addrs[i], &port_temp);
+    if (errors[i] == GRPC_ERROR_NONE) {
+      if (*port_num == -1) {
+        *port_num = port_temp;
+      } else {
+        GPR_ASSERT(*port_num == port_temp);
+      }
+      count++;
+    }
+  }
+  if (count == 0) {
+    char *msg;
+    gpr_asprintf(&msg, "No address added out of total %" PRIuPTR " resolved",
+                 naddrs);
+    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs);
+    gpr_free(msg);
+    goto error;
+  } else if (count != naddrs) {
+    char *msg;
+    gpr_asprintf(&msg, "Only %" PRIuPTR
+                       " addresses added out of total %" PRIuPTR " resolved",
+                 count, naddrs);
+    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs);
+    gpr_free(msg);
+
+    const char *warning_message = grpc_error_string(err);
+    gpr_log(GPR_INFO, "WARNING: %s", warning_message);
+    grpc_error_free_string(warning_message);
+    /* we managed to bind some addresses: continue */
+  }
+  grpc_resolved_addresses_destroy(resolved);
+
+  /* Register with the server only upon success */
+  grpc_server_add_listener(exec_ctx, server, state, server_start_listener,
+                           server_destroy_listener);
+  goto done;
+
+/* Error path: cleanup and return */
+error:
+  GPR_ASSERT(err != GRPC_ERROR_NONE);
+  if (resolved) {
+    grpc_resolved_addresses_destroy(resolved);
+  }
+  if (tcp_server) {
+    grpc_tcp_server_unref(exec_ctx, tcp_server);
+  } else {
+    grpc_channel_args_destroy(args);
+    grpc_chttp2_server_handshaker_factory_destroy(exec_ctx, handshaker_factory);
+    gpr_free(state);
+  }
+  *port_num = 0;
+
+done:
+  if (errors != NULL) {
+    for (i = 0; i < naddrs; i++) {
+      GRPC_ERROR_UNREF(errors[i]);
+    }
+    gpr_free(errors);
+  }
+  return err;
+}
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.h b/src/core/ext/transport/chttp2/server/chttp2_server.h
new file mode 100644
index 0000000000..aa364b565d
--- /dev/null
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.h
@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_SERVER_CHTTP2_SERVER_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_SERVER_CHTTP2_SERVER_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+/// A server handshaker factory is used to create handshakers for server
+/// connections.
+typedef struct grpc_chttp2_server_handshaker_factory
+    grpc_chttp2_server_handshaker_factory;
+
+typedef struct {
+  void (*add_handshakers)(
+      grpc_exec_ctx *exec_ctx,
+      grpc_chttp2_server_handshaker_factory *handshaker_factory,
+      grpc_handshake_manager *handshake_mgr);
+  void (*destroy)(grpc_exec_ctx *exec_ctx,
+                  grpc_chttp2_server_handshaker_factory *handshaker_factory);
+} grpc_chttp2_server_handshaker_factory_vtable;
+
+struct grpc_chttp2_server_handshaker_factory {
+  const grpc_chttp2_server_handshaker_factory_vtable *vtable;
+};
+
+void grpc_chttp2_server_handshaker_factory_add_handshakers(
+    grpc_exec_ctx *exec_ctx,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory,
+    grpc_handshake_manager *handshake_mgr);
+
+void grpc_chttp2_server_handshaker_factory_destroy(
+    grpc_exec_ctx *exec_ctx,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory);
+
+/// Adds a port to \a server.  Sets \a port_num to the port number.
+/// If \a handshaker_factory is not NULL, it will be used to create
+/// handshakers for the port.
+/// Takes ownership of \a args and \a handshaker_factory.
+grpc_error *grpc_chttp2_server_add_port(
+    grpc_exec_ctx *exec_ctx, grpc_server *server, const char *addr,
+    grpc_channel_args *args,
+    grpc_chttp2_server_handshaker_factory *handshaker_factory, int *port_num);
+
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_SERVER_CHTTP2_SERVER_H */
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
index d42611b863..7e286d4e46 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
@@ -33,180 +33,28 @@
 
 #include <grpc/grpc.h>
 
-#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/useful.h>
 
-#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/server/chttp2_server.h"
 #include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/channel/handshaker.h"
-#include "src/core/lib/channel/http_server_filter.h"
-#include "src/core/lib/iomgr/resolve_address.h"
-#include "src/core/lib/iomgr/tcp_server.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
 
-typedef struct server_connect_state {
-  grpc_server *server;
-  grpc_pollset *accepting_pollset;
-  grpc_tcp_server_acceptor *acceptor;
-  grpc_handshake_manager *handshake_mgr;
-} server_connect_state;
-
-static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
-                              grpc_channel_args *args,
-                              gpr_slice_buffer *read_buffer, void *user_data,
-                              grpc_error *error) {
-  server_connect_state *state = user_data;
-  if (error != GRPC_ERROR_NONE) {
-    const char *error_str = grpc_error_string(error);
-    gpr_log(GPR_ERROR, "Handshaking failed: %s", error_str);
-    grpc_error_free_string(error_str);
-    GRPC_ERROR_UNREF(error);
-    grpc_handshake_manager_shutdown(exec_ctx, state->handshake_mgr);
-    gpr_free(read_buffer);
-  } else {
-    // Beware that the call to grpc_create_chttp2_transport() has to happen
-    // before grpc_tcp_server_destroy(). This is fine here, but similar code
-    // asynchronously doing a handshake instead of calling
-    // grpc_tcp_server_start() (as in server_secure_chttp2.c) needs to add
-    // synchronization to avoid this case.
-    grpc_transport *transport =
-        grpc_create_chttp2_transport(exec_ctx, args, endpoint, 0);
-    grpc_server_setup_transport(exec_ctx, state->server, transport,
-                                state->accepting_pollset,
-                                grpc_server_get_channel_args(state->server));
-    grpc_chttp2_transport_start_reading(exec_ctx, transport, read_buffer);
-  }
-  // Clean up.
-  grpc_channel_args_destroy(args);
-  grpc_handshake_manager_destroy(exec_ctx, state->handshake_mgr);
-  gpr_free(state);
-}
-
-static void on_accept(grpc_exec_ctx *exec_ctx, void *server, grpc_endpoint *tcp,
-                      grpc_pollset *accepting_pollset,
-                      grpc_tcp_server_acceptor *acceptor) {
-  server_connect_state *state = gpr_malloc(sizeof(server_connect_state));
-  state->server = server;
-  state->accepting_pollset = accepting_pollset;
-  state->acceptor = acceptor;
-  state->handshake_mgr = grpc_handshake_manager_create();
-  // TODO(roth): We should really get this timeout value from channel
-  // args instead of hard-coding it.
-  const gpr_timespec deadline = gpr_time_add(
-      gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(120, GPR_TIMESPAN));
-  grpc_handshake_manager_do_handshake(
-      exec_ctx, state->handshake_mgr, tcp, grpc_server_get_channel_args(server),
-      deadline, acceptor, on_handshake_done, state);
-}
-
-/* Server callback: start listening on our ports */
-static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
-                  grpc_pollset **pollsets, size_t pollset_count) {
-  grpc_tcp_server *tcp = tcpp;
-  grpc_tcp_server_start(exec_ctx, tcp, pollsets, pollset_count, on_accept,
-                        server);
-}
-
-/* Server callback: destroy the tcp listener (so we don't generate further
-   callbacks) */
-static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
-                    grpc_closure *destroy_done) {
-  grpc_tcp_server *tcp = tcpp;
-  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp);
-  grpc_tcp_server_unref(exec_ctx, tcp);
-  grpc_exec_ctx_sched(exec_ctx, destroy_done, GRPC_ERROR_NONE, NULL);
-}
-
 int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr) {
-  grpc_resolved_addresses *resolved = NULL;
-  grpc_tcp_server *tcp = NULL;
-  size_t i;
-  size_t count = 0;
-  int port_num = -1;
-  int port_temp;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_error *err = GRPC_ERROR_NONE;
-
+  int port_num = 0;
   GRPC_API_TRACE("grpc_server_add_insecure_http2_port(server=%p, addr=%s)", 2,
                  (server, addr));
-
-  grpc_error **errors = NULL;
-  err = grpc_blocking_resolve_address(addr, "https", &resolved);
-  if (err != GRPC_ERROR_NONE) {
-    goto error;
-  }
-
-  err = grpc_tcp_server_create(&exec_ctx, NULL,
-                               grpc_server_get_channel_args(server), &tcp);
+  grpc_error *err = grpc_chttp2_server_add_port(
+      &exec_ctx, server, addr,
+      grpc_channel_args_copy(grpc_server_get_channel_args(server)),
+      NULL /* handshaker_factory */, &port_num);
   if (err != GRPC_ERROR_NONE) {
-    goto error;
-  }
-
-  const size_t naddrs = resolved->naddrs;
-  errors = gpr_malloc(sizeof(*errors) * naddrs);
-  for (i = 0; i < naddrs; i++) {
-    errors[i] = grpc_tcp_server_add_port(tcp, &resolved->addrs[i], &port_temp);
-    if (errors[i] == GRPC_ERROR_NONE) {
-      if (port_num == -1) {
-        port_num = port_temp;
-      } else {
-        GPR_ASSERT(port_num == port_temp);
-      }
-      count++;
-    }
+    const char *msg = grpc_error_string(err);
+    gpr_log(GPR_ERROR, "%s", msg);
+    grpc_error_free_string(msg);
+    GRPC_ERROR_UNREF(err);
   }
-  if (count == 0) {
-    char *msg;
-    gpr_asprintf(&msg, "No address added out of total %" PRIuPTR " resolved",
-                 naddrs);
-    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs);
-    gpr_free(msg);
-    goto error;
-  } else if (count != naddrs) {
-    char *msg;
-    gpr_asprintf(&msg, "Only %" PRIuPTR
-                       " addresses added out of total %" PRIuPTR " resolved",
-                 count, naddrs);
-    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs);
-    gpr_free(msg);
-
-    const char *warning_message = grpc_error_string(err);
-    gpr_log(GPR_INFO, "WARNING: %s", warning_message);
-    grpc_error_free_string(warning_message);
-    /* we managed to bind some addresses: continue */
-  }
-  grpc_resolved_addresses_destroy(resolved);
-
-  /* Register with the server only upon success */
-  grpc_server_add_listener(&exec_ctx, server, tcp, start, destroy);
-  goto done;
-
-/* Error path: cleanup and return */
-error:
-  GPR_ASSERT(err != GRPC_ERROR_NONE);
-  if (resolved) {
-    grpc_resolved_addresses_destroy(resolved);
-  }
-  if (tcp) {
-    grpc_tcp_server_unref(&exec_ctx, tcp);
-  }
-  port_num = 0;
-
-  const char *msg = grpc_error_string(err);
-  gpr_log(GPR_ERROR, "%s", msg);
-  grpc_error_free_string(msg);
-  GRPC_ERROR_UNREF(err);
-
-done:
   grpc_exec_ctx_finish(&exec_ctx);
-  if (errors != NULL) {
-    for (i = 0; i < naddrs; i++) {
-      GRPC_ERROR_UNREF(errors[i]);
-    }
-  }
-  gpr_free(errors);
   return port_num;
 }
diff --git a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
index 7ad687042d..a33a7a3f7d 100644
--- a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
@@ -38,218 +38,63 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
-#include <grpc/support/sync.h>
-#include <grpc/support/useful.h>
+
+#include "src/core/ext/transport/chttp2/server/chttp2_server.h"
+
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/handshaker.h"
-#include "src/core/lib/channel/http_server_filter.h"
-#include "src/core/lib/iomgr/endpoint.h"
-#include "src/core/lib/iomgr/resolve_address.h"
-#include "src/core/lib/iomgr/tcp_server.h"
 #include "src/core/lib/security/context/security_context.h"
 #include "src/core/lib/security/credentials/credentials.h"
-#include "src/core/lib/security/transport/auth_filters.h"
-#include "src/core/lib/security/transport/security_connector.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
 
-typedef struct server_secure_state {
-  grpc_server *server;
-  grpc_tcp_server *tcp;
-  grpc_server_security_connector *sc;
-  grpc_server_credentials *creds;
-  bool is_shutdown;
-  gpr_mu mu;
-  grpc_closure tcp_server_shutdown_complete;
-  grpc_closure *server_destroy_listener_done;
-} server_secure_state;
-
-typedef struct server_secure_connect {
-  server_secure_state *server_state;
-  grpc_pollset *accepting_pollset;
-  grpc_tcp_server_acceptor *acceptor;
-  grpc_handshake_manager *handshake_mgr;
-  // TODO(roth): Remove the following two fields when we eliminate
-  // grpc_server_security_connector_do_handshake().
-  gpr_timespec deadline;
-  grpc_channel_args *args;
-} server_secure_connect;
-
-static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *statep,
-                                     grpc_security_status status,
-                                     grpc_endpoint *secure_endpoint,
-                                     grpc_auth_context *auth_context) {
-  server_secure_connect *connection_state = statep;
-  if (status == GRPC_SECURITY_OK) {
-    if (secure_endpoint) {
-      gpr_mu_lock(&connection_state->server_state->mu);
-      if (!connection_state->server_state->is_shutdown) {
-        grpc_transport *transport = grpc_create_chttp2_transport(
-            exec_ctx, grpc_server_get_channel_args(
-                          connection_state->server_state->server),
-            secure_endpoint, 0);
-        grpc_arg args_to_add[2];
-        args_to_add[0] = grpc_server_credentials_to_arg(
-            connection_state->server_state->creds);
-        args_to_add[1] = grpc_auth_context_to_arg(auth_context);
-        grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
-            connection_state->args, args_to_add, GPR_ARRAY_SIZE(args_to_add));
-        grpc_server_setup_transport(
-            exec_ctx, connection_state->server_state->server, transport,
-            connection_state->accepting_pollset, args_copy);
-        grpc_channel_args_destroy(args_copy);
-        grpc_chttp2_transport_start_reading(exec_ctx, transport, NULL);
-      } else {
-        /* We need to consume this here, because the server may already have
-         * gone away. */
-        grpc_endpoint_destroy(exec_ctx, secure_endpoint);
-      }
-      gpr_mu_unlock(&connection_state->server_state->mu);
-    }
-  } else {
-    gpr_log(GPR_ERROR, "Secure transport failed with error %d", status);
-  }
-  grpc_channel_args_destroy(connection_state->args);
-  grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp);
-  gpr_free(connection_state);
-}
-
-static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
-                              grpc_channel_args *args,
-                              gpr_slice_buffer *read_buffer, void *user_data,
-                              grpc_error *error) {
-  server_secure_connect *connection_state = user_data;
-  if (error != GRPC_ERROR_NONE) {
-    const char *error_str = grpc_error_string(error);
-    gpr_log(GPR_ERROR, "Handshaking failed: %s", error_str);
-    grpc_error_free_string(error_str);
-    GRPC_ERROR_UNREF(error);
-    grpc_channel_args_destroy(args);
-    gpr_free(read_buffer);
-    grpc_handshake_manager_shutdown(exec_ctx, connection_state->handshake_mgr);
-    grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
-    grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp);
-    gpr_free(connection_state);
-    return;
-  }
-  grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
-  connection_state->handshake_mgr = NULL;
-  // TODO(roth, jboeuf): Convert security connector handshaking to use new
-  // handshake API, and then move the code from on_secure_handshake_done()
-  // into this function.
-  connection_state->args = args;
-  grpc_server_security_connector_do_handshake(
-      exec_ctx, connection_state->server_state->sc, connection_state->acceptor,
-      endpoint, read_buffer, connection_state->deadline,
-      on_secure_handshake_done, connection_state);
-}
-
-static void on_accept(grpc_exec_ctx *exec_ctx, void *statep, grpc_endpoint *tcp,
-                      grpc_pollset *accepting_pollset,
-                      grpc_tcp_server_acceptor *acceptor) {
-  server_secure_state *server_state = statep;
-  server_secure_connect *connection_state = NULL;
-  gpr_mu_lock(&server_state->mu);
-  if (server_state->is_shutdown) {
-    gpr_mu_unlock(&server_state->mu);
-    grpc_endpoint_destroy(exec_ctx, tcp);
-    return;
-  }
-  gpr_mu_unlock(&server_state->mu);
-  grpc_tcp_server_ref(server_state->tcp);
-  connection_state = gpr_malloc(sizeof(*connection_state));
-  connection_state->server_state = server_state;
-  connection_state->accepting_pollset = accepting_pollset;
-  connection_state->acceptor = acceptor;
-  connection_state->handshake_mgr = grpc_handshake_manager_create();
-  // TODO(roth): We should really get this timeout value from channel
-  // args instead of hard-coding it.
-  connection_state->deadline = gpr_time_add(
-      gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(120, GPR_TIMESPAN));
-  grpc_handshake_manager_do_handshake(
-      exec_ctx, connection_state->handshake_mgr, tcp,
-      grpc_server_get_channel_args(connection_state->server_state->server),
-      connection_state->deadline, acceptor, on_handshake_done,
-      connection_state);
+typedef struct {
+  grpc_chttp2_server_handshaker_factory base;
+  grpc_server_security_connector *security_connector;
+} server_security_handshaker_factory;
+
+static void server_security_handshaker_factory_add_handshakers(
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_server_handshaker_factory *hf,
+    grpc_handshake_manager *handshake_mgr) {
+  server_security_handshaker_factory *handshaker_factory =
+      (server_security_handshaker_factory *)hf;
+  grpc_server_security_connector_add_handshakers(
+      exec_ctx, handshaker_factory->security_connector, handshake_mgr);
 }
 
-/* Server callback: start listening on our ports */
-static void server_start_listener(grpc_exec_ctx *exec_ctx, grpc_server *server,
-                                  void *statep, grpc_pollset **pollsets,
-                                  size_t pollset_count) {
-  server_secure_state *server_state = statep;
-  gpr_mu_lock(&server_state->mu);
-  server_state->is_shutdown = false;
-  gpr_mu_unlock(&server_state->mu);
-  grpc_tcp_server_start(exec_ctx, server_state->tcp, pollsets, pollset_count,
-                        on_accept, server_state);
+static void server_security_handshaker_factory_destroy(
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_server_handshaker_factory *hf) {
+  server_security_handshaker_factory *handshaker_factory =
+      (server_security_handshaker_factory *)hf;
+  GRPC_SECURITY_CONNECTOR_UNREF(&handshaker_factory->security_connector->base,
+                                "server");
+  gpr_free(hf);
 }
 
-static void tcp_server_shutdown_complete(grpc_exec_ctx *exec_ctx, void *statep,
-                                         grpc_error *error) {
-  server_secure_state *server_state = statep;
-  /* ensure all threads have unlocked */
-  gpr_mu_lock(&server_state->mu);
-  grpc_closure *destroy_done = server_state->server_destroy_listener_done;
-  GPR_ASSERT(server_state->is_shutdown);
-  gpr_mu_unlock(&server_state->mu);
-  /* clean up */
-  grpc_server_security_connector_shutdown(exec_ctx, server_state->sc);
-
-  /* Flush queued work before a synchronous unref. */
-  grpc_exec_ctx_flush(exec_ctx);
-  GRPC_SECURITY_CONNECTOR_UNREF(&server_state->sc->base, "server");
-  grpc_server_credentials_unref(server_state->creds);
-
-  if (destroy_done != NULL) {
-    destroy_done->cb(exec_ctx, destroy_done->cb_arg, GRPC_ERROR_REF(error));
-    grpc_exec_ctx_flush(exec_ctx);
-  }
-  gpr_free(server_state);
-}
-
-static void server_destroy_listener(grpc_exec_ctx *exec_ctx,
-                                    grpc_server *server, void *statep,
-                                    grpc_closure *callback) {
-  server_secure_state *server_state = statep;
-  grpc_tcp_server *tcp;
-  gpr_mu_lock(&server_state->mu);
-  server_state->is_shutdown = true;
-  server_state->server_destroy_listener_done = callback;
-  tcp = server_state->tcp;
-  gpr_mu_unlock(&server_state->mu);
-  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp);
-  grpc_tcp_server_unref(exec_ctx, server_state->tcp);
-}
+static const grpc_chttp2_server_handshaker_factory_vtable
+    server_security_handshaker_factory_vtable = {
+        server_security_handshaker_factory_add_handshakers,
+        server_security_handshaker_factory_destroy};
 
 int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
                                       grpc_server_credentials *creds) {
-  grpc_resolved_addresses *resolved = NULL;
-  grpc_tcp_server *tcp = NULL;
-  server_secure_state *server_state = NULL;
-  size_t i;
-  size_t count = 0;
-  int port_num = -1;
-  int port_temp;
-  grpc_security_status status = GRPC_SECURITY_ERROR;
-  grpc_server_security_connector *sc = NULL;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_error *err = GRPC_ERROR_NONE;
-  grpc_error **errors = NULL;
-
+  grpc_server_security_connector *sc = NULL;
+  int port_num = 0;
   GRPC_API_TRACE(
       "grpc_server_add_secure_http2_port("
       "server=%p, addr=%s, creds=%p)",
       3, (server, addr, creds));
-
-  /* create security context */
+  // Create security context.
   if (creds == NULL) {
     err = GRPC_ERROR_CREATE(
         "No credentials specified for secure server port (creds==NULL)");
-    goto error;
+    goto done;
   }
-  status = grpc_server_credentials_create_security_connector(creds, &sc);
+  grpc_security_status status =
+      grpc_server_credentials_create_security_connector(creds, &sc);
   if (status != GRPC_SECURITY_OK) {
     char *msg;
     gpr_asprintf(&msg,
@@ -258,107 +103,28 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
     err = grpc_error_set_int(GRPC_ERROR_CREATE(msg),
                              GRPC_ERROR_INT_SECURITY_STATUS, status);
     gpr_free(msg);
-    goto error;
+    goto done;
   }
-  sc->channel_args = grpc_server_get_channel_args(server);
-
-  /* resolve address */
-  err = grpc_blocking_resolve_address(addr, "https", &resolved);
-  if (err != GRPC_ERROR_NONE) {
-    goto error;
-  }
-  server_state = gpr_malloc(sizeof(*server_state));
-  memset(server_state, 0, sizeof(*server_state));
-  grpc_closure_init(&server_state->tcp_server_shutdown_complete,
-                    tcp_server_shutdown_complete, server_state);
-  err = grpc_tcp_server_create(&exec_ctx,
-                               &server_state->tcp_server_shutdown_complete,
-                               grpc_server_get_channel_args(server), &tcp);
+  // Create handshaker factory.
+  server_security_handshaker_factory *handshaker_factory =
+      gpr_malloc(sizeof(*handshaker_factory));
+  memset(handshaker_factory, 0, sizeof(*handshaker_factory));
+  handshaker_factory->base.vtable = &server_security_handshaker_factory_vtable;
+  handshaker_factory->security_connector = sc;
+  // Create channel args.
+  grpc_arg channel_arg = grpc_server_credentials_to_arg(creds);
+  grpc_channel_args *args = grpc_channel_args_copy_and_add(
+      grpc_server_get_channel_args(server), &channel_arg, 1);
+  // Add server port.
+  err = grpc_chttp2_server_add_port(&exec_ctx, server, addr, args,
+                                    &handshaker_factory->base, &port_num);
+done:
+  grpc_exec_ctx_finish(&exec_ctx);
   if (err != GRPC_ERROR_NONE) {
-    goto error;
+    const char *msg = grpc_error_string(err);
+    gpr_log(GPR_ERROR, "%s", msg);
+    grpc_error_free_string(msg);
+    GRPC_ERROR_UNREF(err);
   }
-
-  server_state->server = server;
-  server_state->tcp = tcp;
-  server_state->sc = sc;
-  server_state->creds = grpc_server_credentials_ref(creds);
-  server_state->is_shutdown = true;
-  gpr_mu_init(&server_state->mu);
-
-  errors = gpr_malloc(sizeof(*errors) * resolved->naddrs);
-  for (i = 0; i < resolved->naddrs; i++) {
-    errors[i] = grpc_tcp_server_add_port(tcp, &resolved->addrs[i], &port_temp);
-    if (errors[i] == GRPC_ERROR_NONE) {
-      if (port_num == -1) {
-        port_num = port_temp;
-      } else {
-        GPR_ASSERT(port_num == port_temp);
-      }
-      count++;
-    }
-  }
-  if (count == 0) {
-    char *msg;
-    gpr_asprintf(&msg, "No address added out of total %" PRIuPTR " resolved",
-                 resolved->naddrs);
-    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, resolved->naddrs);
-    gpr_free(msg);
-    goto error;
-  } else if (count != resolved->naddrs) {
-    char *msg;
-    gpr_asprintf(&msg, "Only %" PRIuPTR
-                       " addresses added out of total %" PRIuPTR " resolved",
-                 count, resolved->naddrs);
-    err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, resolved->naddrs);
-    gpr_free(msg);
-
-    const char *warning_message = grpc_error_string(err);
-    gpr_log(GPR_INFO, "WARNING: %s", warning_message);
-    grpc_error_free_string(warning_message);
-    /* we managed to bind some addresses: continue */
-  } else {
-    for (i = 0; i < resolved->naddrs; i++) {
-      GRPC_ERROR_UNREF(errors[i]);
-    }
-  }
-  gpr_free(errors);
-  errors = NULL;
-  grpc_resolved_addresses_destroy(resolved);
-
-  /* Register with the server only upon success */
-  grpc_server_add_listener(&exec_ctx, server, server_state,
-                           server_start_listener, server_destroy_listener);
-
-  grpc_exec_ctx_finish(&exec_ctx);
   return port_num;
-
-/* Error path: cleanup and return */
-error:
-  GPR_ASSERT(err != GRPC_ERROR_NONE);
-  if (errors != NULL) {
-    for (i = 0; i < resolved->naddrs; i++) {
-      GRPC_ERROR_UNREF(errors[i]);
-    }
-    gpr_free(errors);
-  }
-  if (resolved) {
-    grpc_resolved_addresses_destroy(resolved);
-  }
-  if (tcp) {
-    grpc_tcp_server_unref(&exec_ctx, tcp);
-  } else {
-    if (sc) {
-      grpc_exec_ctx_flush(&exec_ctx);
-      GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "server");
-    }
-    if (server_state) {
-      gpr_free(server_state);
-    }
-  }
-  grpc_exec_ctx_finish(&exec_ctx);
-  const char *msg = grpc_error_string(err);
-  GRPC_ERROR_UNREF(err);
-  gpr_log(GPR_ERROR, "%s", msg);
-  grpc_error_free_string(msg);
-  return 0;
 }
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.c b/src/core/ext/transport/chttp2/transport/bin_decoder.c
index 2d90b01cd8..3eef80b557 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.c
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.c
@@ -34,6 +34,7 @@
 #include "src/core/ext/transport/chttp2/transport/bin_decoder.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 static uint8_t decode_table[] = {
@@ -142,11 +143,11 @@ bool grpc_base64_decode_partial(struct grpc_base64_decode_context *ctx) {
   return true;
 }
 
-gpr_slice grpc_chttp2_base64_decode(gpr_slice input) {
-  size_t input_length = GPR_SLICE_LENGTH(input);
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input) {
+  size_t input_length = GRPC_SLICE_LENGTH(input);
   size_t output_length = input_length / 4 * 3;
   struct grpc_base64_decode_context ctx;
-  gpr_slice output;
+  grpc_slice output;
 
   if (input_length % 4 != 0) {
     gpr_log(GPR_ERROR,
@@ -158,7 +159,7 @@ gpr_slice grpc_chttp2_base64_decode(gpr_slice input) {
   }
 
   if (input_length > 0) {
-    uint8_t *input_end = GPR_SLICE_END_PTR(input);
+    uint8_t *input_end = GRPC_SLICE_END_PTR(input);
     if (*(--input_end) == '=') {
       output_length--;
       if (*(--input_end) == '=') {
@@ -166,30 +167,30 @@ gpr_slice grpc_chttp2_base64_decode(gpr_slice input) {
       }
     }
   }
-  output = gpr_slice_malloc(output_length);
+  output = grpc_slice_malloc(output_length);
 
-  ctx.input_cur = GPR_SLICE_START_PTR(input);
-  ctx.input_end = GPR_SLICE_END_PTR(input);
-  ctx.output_cur = GPR_SLICE_START_PTR(output);
-  ctx.output_end = GPR_SLICE_END_PTR(output);
+  ctx.input_cur = GRPC_SLICE_START_PTR(input);
+  ctx.input_end = GRPC_SLICE_END_PTR(input);
+  ctx.output_cur = GRPC_SLICE_START_PTR(output);
+  ctx.output_end = GRPC_SLICE_END_PTR(output);
   ctx.contains_tail = false;
 
   if (!grpc_base64_decode_partial(&ctx)) {
-    char *s = gpr_dump_slice(input, GPR_DUMP_ASCII);
+    char *s = grpc_dump_slice(input, GPR_DUMP_ASCII);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    gpr_slice_unref(output);
+    grpc_slice_unref(output);
     return gpr_empty_slice();
   }
-  GPR_ASSERT(ctx.output_cur == GPR_SLICE_END_PTR(output));
-  GPR_ASSERT(ctx.input_cur == GPR_SLICE_END_PTR(input));
+  GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
+  GPR_ASSERT(ctx.input_cur == GRPC_SLICE_END_PTR(input));
   return output;
 }
 
-gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
-                                                size_t output_length) {
-  size_t input_length = GPR_SLICE_LENGTH(input);
-  gpr_slice output = gpr_slice_malloc(output_length);
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
+                                                 size_t output_length) {
+  size_t input_length = GRPC_SLICE_LENGTH(input);
+  grpc_slice output = grpc_slice_malloc(output_length);
   struct grpc_base64_decode_context ctx;
 
   // The length of a base64 string cannot be 4 * n + 1
@@ -199,7 +200,7 @@ gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
             "grpc_chttp2_base64_decode_with_length has a length of %d, which "
             "has a tail of 1 byte.\n",
             (int)input_length);
-    gpr_slice_unref(output);
+    grpc_slice_unref(output);
     return gpr_empty_slice();
   }
 
@@ -209,24 +210,24 @@ gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
             "than the max possible output length %d.\n",
             (int)output_length,
             (int)(input_length / 4 * 3 + tail_xtra[input_length % 4]));
-    gpr_slice_unref(output);
+    grpc_slice_unref(output);
     return gpr_empty_slice();
   }
 
-  ctx.input_cur = GPR_SLICE_START_PTR(input);
-  ctx.input_end = GPR_SLICE_END_PTR(input);
-  ctx.output_cur = GPR_SLICE_START_PTR(output);
-  ctx.output_end = GPR_SLICE_END_PTR(output);
+  ctx.input_cur = GRPC_SLICE_START_PTR(input);
+  ctx.input_end = GRPC_SLICE_END_PTR(input);
+  ctx.output_cur = GRPC_SLICE_START_PTR(output);
+  ctx.output_end = GRPC_SLICE_END_PTR(output);
   ctx.contains_tail = true;
 
   if (!grpc_base64_decode_partial(&ctx)) {
-    char *s = gpr_dump_slice(input, GPR_DUMP_ASCII);
+    char *s = grpc_dump_slice(input, GPR_DUMP_ASCII);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    gpr_slice_unref(output);
+    grpc_slice_unref(output);
     return gpr_empty_slice();
   }
-  GPR_ASSERT(ctx.output_cur == GPR_SLICE_END_PTR(output));
-  GPR_ASSERT(ctx.input_cur <= GPR_SLICE_END_PTR(input));
+  GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
+  GPR_ASSERT(ctx.input_cur <= GRPC_SLICE_END_PTR(input));
   return output;
 }
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.h b/src/core/ext/transport/chttp2/transport/bin_decoder.h
index b9d40c9b74..83a90be519 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include <stdbool.h>
 
 struct grpc_base64_decode_context {
@@ -55,12 +55,12 @@ bool grpc_base64_decode_partial(struct grpc_base64_decode_context *ctx);
 
 /* base64 decode a slice with pad chars. Returns a new slice, does not take
    ownership of the input. Returns an empty slice if decoding is failed. */
-gpr_slice grpc_chttp2_base64_decode(gpr_slice input);
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input);
 
 /* base64 decode a slice without pad chars, data length is needed. Returns a new
    slice, does not take ownership of the input. Returns an empty slice if
    decoding is failed. */
-gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
-                                                size_t output_length);
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
+                                                 size_t output_length);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */
diff --git a/src/core/ext/transport/chttp2/transport/bin_encoder.c b/src/core/ext/transport/chttp2/transport/bin_encoder.c
index 1b43c28be1..af25a4352a 100644
--- a/src/core/ext/transport/chttp2/transport/bin_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.c
@@ -61,14 +61,14 @@ static const b64_huff_sym huff_alphabet[64] = {
 
 static const uint8_t tail_xtra[3] = {0, 2, 3};
 
-gpr_slice grpc_chttp2_base64_encode(gpr_slice input) {
-  size_t input_length = GPR_SLICE_LENGTH(input);
+grpc_slice grpc_chttp2_base64_encode(grpc_slice input) {
+  size_t input_length = GRPC_SLICE_LENGTH(input);
   size_t input_triplets = input_length / 3;
   size_t tail_case = input_length % 3;
   size_t output_length = input_triplets * 4 + tail_xtra[tail_case];
-  gpr_slice output = gpr_slice_malloc(output_length);
-  uint8_t *in = GPR_SLICE_START_PTR(input);
-  char *out = (char *)GPR_SLICE_START_PTR(output);
+  grpc_slice output = grpc_slice_malloc(output_length);
+  uint8_t *in = GRPC_SLICE_START_PTR(input);
+  char *out = (char *)GRPC_SLICE_START_PTR(output);
   size_t i;
 
   /* encode full triplets */
@@ -100,27 +100,29 @@ gpr_slice grpc_chttp2_base64_encode(gpr_slice input) {
       break;
   }
 
-  GPR_ASSERT(out == (char *)GPR_SLICE_END_PTR(output));
-  GPR_ASSERT(in == GPR_SLICE_END_PTR(input));
+  GPR_ASSERT(out == (char *)GRPC_SLICE_END_PTR(output));
+  GPR_ASSERT(in == GRPC_SLICE_END_PTR(input));
   return output;
 }
 
-gpr_slice grpc_chttp2_huffman_compress(gpr_slice input) {
+grpc_slice grpc_chttp2_huffman_compress(grpc_slice input) {
   size_t nbits;
   uint8_t *in;
   uint8_t *out;
-  gpr_slice output;
+  grpc_slice output;
   uint32_t temp = 0;
   uint32_t temp_length = 0;
 
   nbits = 0;
-  for (in = GPR_SLICE_START_PTR(input); in != GPR_SLICE_END_PTR(input); ++in) {
+  for (in = GRPC_SLICE_START_PTR(input); in != GRPC_SLICE_END_PTR(input);
+       ++in) {
     nbits += grpc_chttp2_huffsyms[*in].length;
   }
 
-  output = gpr_slice_malloc(nbits / 8 + (nbits % 8 != 0));
-  out = GPR_SLICE_START_PTR(output);
-  for (in = GPR_SLICE_START_PTR(input); in != GPR_SLICE_END_PTR(input); ++in) {
+  output = grpc_slice_malloc(nbits / 8 + (nbits % 8 != 0));
+  out = GRPC_SLICE_START_PTR(output);
+  for (in = GRPC_SLICE_START_PTR(input); in != GRPC_SLICE_END_PTR(input);
+       ++in) {
     int sym = *in;
     temp <<= grpc_chttp2_huffsyms[sym].length;
     temp |= grpc_chttp2_huffsyms[sym].bits;
@@ -141,7 +143,7 @@ gpr_slice grpc_chttp2_huffman_compress(gpr_slice input) {
                        (uint8_t)(0xffu >> temp_length));
   }
 
-  GPR_ASSERT(out == GPR_SLICE_END_PTR(output));
+  GPR_ASSERT(out == GRPC_SLICE_END_PTR(output));
 
   return output;
 }
@@ -175,16 +177,17 @@ static void enc_add1(huff_out *out, uint8_t a) {
   enc_flush_some(out);
 }
 
-gpr_slice grpc_chttp2_base64_encode_and_huffman_compress_impl(gpr_slice input) {
-  size_t input_length = GPR_SLICE_LENGTH(input);
+grpc_slice grpc_chttp2_base64_encode_and_huffman_compress_impl(
+    grpc_slice input) {
+  size_t input_length = GRPC_SLICE_LENGTH(input);
   size_t input_triplets = input_length / 3;
   size_t tail_case = input_length % 3;
   size_t output_syms = input_triplets * 4 + tail_xtra[tail_case];
   size_t max_output_bits = 11 * output_syms;
   size_t max_output_length = max_output_bits / 8 + (max_output_bits % 8 != 0);
-  gpr_slice output = gpr_slice_malloc(max_output_length);
-  uint8_t *in = GPR_SLICE_START_PTR(input);
-  uint8_t *start_out = GPR_SLICE_START_PTR(output);
+  grpc_slice output = grpc_slice_malloc(max_output_length);
+  uint8_t *in = GRPC_SLICE_START_PTR(input);
+  uint8_t *start_out = GRPC_SLICE_START_PTR(output);
   huff_out out;
   size_t i;
 
@@ -231,9 +234,9 @@ gpr_slice grpc_chttp2_base64_encode_and_huffman_compress_impl(gpr_slice input) {
                            (uint8_t)(0xffu >> out.temp_length));
   }
 
-  GPR_ASSERT(out.out <= GPR_SLICE_END_PTR(output));
-  GPR_SLICE_SET_LENGTH(output, out.out - start_out);
+  GPR_ASSERT(out.out <= GRPC_SLICE_END_PTR(output));
+  GRPC_SLICE_SET_LENGTH(output, out.out - start_out);
 
-  GPR_ASSERT(in == GPR_SLICE_END_PTR(input));
+  GPR_ASSERT(in == GRPC_SLICE_END_PTR(input));
   return output;
 }
diff --git a/src/core/ext/transport/chttp2/transport/bin_encoder.h b/src/core/ext/transport/chttp2/transport/bin_encoder.h
index 61ebbafa9a..9e143b46e2 100644
--- a/src/core/ext/transport/chttp2/transport/bin_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.h
@@ -34,21 +34,22 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 /* base64 encode a slice. Returns a new slice, does not take ownership of the
    input */
-gpr_slice grpc_chttp2_base64_encode(gpr_slice input);
+grpc_slice grpc_chttp2_base64_encode(grpc_slice input);
 
 /* Compress a slice with the static huffman encoder detailed in the hpack
    standard. Returns a new slice, does not take ownership of the input */
-gpr_slice grpc_chttp2_huffman_compress(gpr_slice input);
+grpc_slice grpc_chttp2_huffman_compress(grpc_slice input);
 
 /* equivalent to:
-   gpr_slice x = grpc_chttp2_base64_encode(input);
-   gpr_slice y = grpc_chttp2_huffman_compress(x);
-   gpr_slice_unref(x);
+   grpc_slice x = grpc_chttp2_base64_encode(input);
+   grpc_slice y = grpc_chttp2_huffman_compress(x);
+   grpc_slice_unref(x);
    return y; */
-gpr_slice grpc_chttp2_base64_encode_and_huffman_compress_impl(gpr_slice input);
+grpc_slice grpc_chttp2_base64_encode_and_huffman_compress_impl(
+    grpc_slice input);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H */
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index fe1cdd3fa0..40a677405d 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -38,9 +38,9 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
@@ -51,6 +51,7 @@
 #include "src/core/lib/http/parser.h"
 #include "src/core/lib/iomgr/workqueue.h"
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/static_metadata.h"
 #include "src/core/lib/transport/timeout_encoding.h"
@@ -110,9 +111,6 @@ static void incoming_byte_stream_update_flow_control(grpc_exec_ctx *exec_ctx,
 static void incoming_byte_stream_destroy_locked(grpc_exec_ctx *exec_ctx,
                                                 void *byte_stream,
                                                 grpc_error *error_ignored);
-static void fail_pending_writes(grpc_exec_ctx *exec_ctx,
-                                grpc_chttp2_transport *t, grpc_chttp2_stream *s,
-                                grpc_error *error);
 
 static void benign_reclaimer(grpc_exec_ctx *exec_ctx, void *t,
                              grpc_error *error);
@@ -143,12 +141,12 @@ static void destruct_transport(grpc_exec_ctx *exec_ctx,
 
   grpc_endpoint_destroy(exec_ctx, t->ep);
 
-  gpr_slice_buffer_destroy(&t->qbuf);
+  grpc_slice_buffer_destroy(&t->qbuf);
 
-  gpr_slice_buffer_destroy(&t->outbuf);
+  grpc_slice_buffer_destroy(&t->outbuf);
   grpc_chttp2_hpack_compressor_destroy(&t->hpack_compressor);
 
-  gpr_slice_buffer_destroy(&t->read_buffer);
+  grpc_slice_buffer_destroy(&t->read_buffer);
   grpc_chttp2_hpack_parser_destroy(&t->hpack_parser);
   grpc_chttp2_goaway_parser_destroy(&t->goaway_parser);
 
@@ -241,9 +239,9 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
       &t->channel_callback.state_tracker, GRPC_CHANNEL_READY,
       is_client ? "client_transport" : "server_transport");
 
-  gpr_slice_buffer_init(&t->qbuf);
+  grpc_slice_buffer_init(&t->qbuf);
 
-  gpr_slice_buffer_init(&t->outbuf);
+  grpc_slice_buffer_init(&t->outbuf);
   grpc_chttp2_hpack_compressor_init(&t->hpack_compressor);
 
   grpc_closure_init(&t->write_action_begin_locked, write_action_begin_locked,
@@ -262,7 +260,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   grpc_chttp2_goaway_parser_init(&t->goaway_parser);
   grpc_chttp2_hpack_parser_init(&t->hpack_parser);
 
-  gpr_slice_buffer_init(&t->read_buffer);
+  grpc_slice_buffer_init(&t->read_buffer);
 
   /* 8 is a random stab in the dark as to a good initial size: it's small enough
      that it shouldn't waste memory for infrequently used connections, yet
@@ -284,8 +282,8 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   t->sent_local_settings = 0;
 
   if (is_client) {
-    gpr_slice_buffer_add(&t->outbuf, gpr_slice_from_copied_string(
-                                         GRPC_CHTTP2_CLIENT_CONNECT_STRING));
+    grpc_slice_buffer_add(&t->outbuf, grpc_slice_from_copied_string(
+                                          GRPC_CHTTP2_CLIENT_CONNECT_STRING));
     grpc_chttp2_initiate_write(exec_ctx, t, false, "initial_write");
   }
 
@@ -463,7 +461,7 @@ static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
   grpc_chttp2_incoming_metadata_buffer_init(&s->metadata_buffer[0]);
   grpc_chttp2_incoming_metadata_buffer_init(&s->metadata_buffer[1]);
   grpc_chttp2_data_parser_init(&s->data_parser);
-  gpr_slice_buffer_init(&s->flow_controlled_buffer);
+  grpc_slice_buffer_init(&s->flow_controlled_buffer);
   s->deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   grpc_closure_init(&s->complete_fetch, complete_fetch, s);
   grpc_closure_init(&s->complete_fetch_locked, complete_fetch_locked, s);
@@ -536,7 +534,7 @@ static void destroy_stream_locked(grpc_exec_ctx *exec_ctx, void *sp,
   grpc_chttp2_data_parser_destroy(exec_ctx, &s->data_parser);
   grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[0]);
   grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[1]);
-  gpr_slice_buffer_destroy(&s->flow_controlled_buffer);
+  grpc_slice_buffer_destroy(&s->flow_controlled_buffer);
   GRPC_ERROR_UNREF(s->read_closed_error);
   GRPC_ERROR_UNREF(s->write_closed_error);
 
@@ -606,11 +604,13 @@ static void set_write_state(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                                  write_state_name(t->write_state),
                                  write_state_name(st), reason));
   t->write_state = st;
-  if (st == GRPC_CHTTP2_WRITE_STATE_IDLE &&
-      t->close_transport_on_writes_finished != NULL) {
-    grpc_error *err = t->close_transport_on_writes_finished;
-    t->close_transport_on_writes_finished = NULL;
-    close_transport_locked(exec_ctx, t, err);
+  if (st == GRPC_CHTTP2_WRITE_STATE_IDLE) {
+    grpc_exec_ctx_enqueue_list(exec_ctx, &t->run_after_write, NULL);
+    if (t->close_transport_on_writes_finished != NULL) {
+      grpc_error *err = t->close_transport_on_writes_finished;
+      t->close_transport_on_writes_finished = NULL;
+      close_transport_locked(exec_ctx, t, err);
+    }
   }
 }
 
@@ -708,8 +708,6 @@ static void write_action_end_locked(grpc_exec_ctx *exec_ctx, void *tp,
     }
   }
 
-  grpc_chttp2_end_write(exec_ctx, t, GRPC_ERROR_REF(error));
-
   switch (t->write_state) {
     case GRPC_CHTTP2_WRITE_STATE_IDLE:
       GPR_UNREACHABLE_CODE(break);
@@ -738,6 +736,8 @@ static void write_action_end_locked(grpc_exec_ctx *exec_ctx, void *tp,
       break;
   }
 
+  grpc_chttp2_end_write(exec_ctx, t, GRPC_ERROR_REF(error));
+
   GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
   GPR_TIMER_END("terminate_writing_with_lock", 0);
 }
@@ -761,11 +761,11 @@ static void push_setting(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
 void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx *exec_ctx,
                                      grpc_chttp2_transport *t,
                                      uint32_t goaway_error,
-                                     gpr_slice goaway_text) {
-  char *msg = gpr_dump_slice(goaway_text, GPR_DUMP_HEX | GPR_DUMP_ASCII);
+                                     grpc_slice goaway_text) {
+  char *msg = grpc_dump_slice(goaway_text, GPR_DUMP_HEX | GPR_DUMP_ASCII);
   GRPC_CHTTP2_IF_TRACING(
       gpr_log(GPR_DEBUG, "got goaway [%d]: %s", goaway_error, msg));
-  gpr_slice_unref(goaway_text);
+  grpc_slice_unref(goaway_text);
   t->seen_goaway = 1;
   /* lie: use transient failure from the transport to indicate goaway has been
    * received */
@@ -820,7 +820,14 @@ static void maybe_start_some_streams(grpc_exec_ctx *exec_ctx,
   }
 }
 
+/* Flag that this closure barrier wants stats to be updated before finishing */
 #define CLOSURE_BARRIER_STATS_BIT (1 << 0)
+/* Flag that this closure barrier may be covering a write in a pollset, and so
+   we should not complete this closure until we can prove that the write got
+   scheduled */
+#define CLOSURE_BARRIER_MAY_COVER_WRITE (1 << 1)
+/* First bit of the reference count, stored in the high order bits (with the low
+   bits being used for flags defined above) */
 #define CLOSURE_BARRIER_FIRST_REF_BIT (1 << 16)
 
 static grpc_closure *add_closure_barrier(grpc_closure *closure) {
@@ -847,6 +854,16 @@ void grpc_chttp2_complete_closure_step(grpc_exec_ctx *exec_ctx,
     return;
   }
   closure->next_data.scratch -= CLOSURE_BARRIER_FIRST_REF_BIT;
+  if (grpc_http_trace) {
+    const char *errstr = grpc_error_string(error);
+    gpr_log(GPR_DEBUG,
+            "complete_closure_step: %p refs=%d flags=0x%04x desc=%s err=%s",
+            closure,
+            (int)(closure->next_data.scratch / CLOSURE_BARRIER_FIRST_REF_BIT),
+            (int)(closure->next_data.scratch % CLOSURE_BARRIER_FIRST_REF_BIT),
+            desc, errstr);
+    grpc_error_free_string(errstr);
+  }
   if (error != GRPC_ERROR_NONE) {
     if (closure->error_data.error == GRPC_ERROR_NONE) {
       closure->error_data.error =
@@ -863,7 +880,13 @@ void grpc_chttp2_complete_closure_step(grpc_exec_ctx *exec_ctx,
       grpc_transport_move_stats(&s->stats, s->collecting_stats);
       s->collecting_stats = NULL;
     }
-    grpc_closure_run(exec_ctx, closure, closure->error_data.error);
+    if ((t->write_state == GRPC_CHTTP2_WRITE_STATE_IDLE) ||
+        !(closure->next_data.scratch & CLOSURE_BARRIER_MAY_COVER_WRITE)) {
+      grpc_closure_run(exec_ctx, closure, closure->error_data.error);
+    } else {
+      grpc_closure_list_append(&t->run_after_write, closure,
+                               closure->error_data.error);
+    }
   }
 }
 
@@ -882,8 +905,8 @@ static void add_fetched_slice_locked(grpc_exec_ctx *exec_ctx,
                                      grpc_chttp2_transport *t,
                                      grpc_chttp2_stream *s) {
   s->fetched_send_message_length +=
-      (uint32_t)GPR_SLICE_LENGTH(s->fetching_slice);
-  gpr_slice_buffer_add(&s->flow_controlled_buffer, s->fetching_slice);
+      (uint32_t)GRPC_SLICE_LENGTH(s->fetching_slice);
+  grpc_slice_buffer_add(&s->flow_controlled_buffer, s->fetching_slice);
   if (s->id != 0) {
     grpc_chttp2_become_writable(exec_ctx, t, s, true, "op.send_message");
   }
@@ -951,6 +974,16 @@ static void complete_fetch(grpc_exec_ctx *exec_ctx, void *gs,
 
 static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
 
+static void log_metadata(const grpc_metadata_batch *md_batch, uint32_t id,
+                         bool is_client, bool is_initial) {
+  for (grpc_linked_mdelem *md = md_batch->list.head; md != md_batch->list.tail;
+       md = md->next) {
+    gpr_log(GPR_INFO, "HTTP:%d:%s:%s: %s: %s", id, is_initial ? "HDR" : "TRL",
+            is_client ? "CLI" : "SVR", grpc_mdstr_as_c_string(md->md->key),
+            grpc_mdstr_as_c_string(md->md->value));
+  }
+}
+
 static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
                                      grpc_error *error_ignored) {
   GPR_TIMER_BEGIN("perform_stream_op_locked", 0);
@@ -964,6 +997,12 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
     gpr_log(GPR_DEBUG, "perform_stream_op_locked: %s; on_complete = %p", str,
             op->on_complete);
     gpr_free(str);
+    if (op->send_initial_metadata) {
+      log_metadata(op->send_initial_metadata, s->id, t->is_client, true);
+    }
+    if (op->send_trailing_metadata) {
+      log_metadata(op->send_trailing_metadata, s->id, t->is_client, false);
+    }
   }
 
   grpc_closure *on_complete = op->on_complete;
@@ -992,6 +1031,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
 
   if (op->send_initial_metadata != NULL) {
     GPR_ASSERT(s->send_initial_metadata_finished == NULL);
+    on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->send_initial_metadata_finished = add_closure_barrier(on_complete);
     s->send_initial_metadata = op->send_initial_metadata;
     const size_t metadata_size =
@@ -1034,7 +1074,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
                                       "op.send_initial_metadata");
         }
       } else {
-        s->send_trailing_metadata = NULL;
+        s->send_initial_metadata = NULL;
         grpc_chttp2_complete_closure_step(
             exec_ctx, t, s, &s->send_initial_metadata_finished,
             GRPC_ERROR_CREATE(
@@ -1045,6 +1085,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
   }
 
   if (op->send_message != NULL) {
+    on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->fetching_send_message_finished = add_closure_barrier(op->on_complete);
     if (s->write_closed) {
       grpc_chttp2_complete_closure_step(
@@ -1054,7 +1095,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
     } else {
       GPR_ASSERT(s->fetching_send_message == NULL);
       uint8_t *frame_hdr =
-          gpr_slice_buffer_tiny_add(&s->flow_controlled_buffer, 5);
+          grpc_slice_buffer_tiny_add(&s->flow_controlled_buffer, 5);
       uint32_t flags = op->send_message->flags;
       frame_hdr[0] = (flags & GRPC_WRITE_INTERNAL_COMPRESS) != 0;
       size_t len = op->send_message->length;
@@ -1082,6 +1123,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
 
   if (op->send_trailing_metadata != NULL) {
     GPR_ASSERT(s->send_trailing_metadata_finished == NULL);
+    on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->send_trailing_metadata_finished = add_closure_barrier(on_complete);
     s->send_trailing_metadata = op->send_trailing_metadata;
     const size_t metadata_size =
@@ -1193,7 +1235,7 @@ static void send_ping_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   p->id[7] = (uint8_t)(t->ping_counter & 0xff);
   t->ping_counter++;
   p->on_recv = on_recv;
-  gpr_slice_buffer_add(&t->qbuf, grpc_chttp2_ping_create(0, p->id));
+  grpc_slice_buffer_add(&t->qbuf, grpc_chttp2_ping_create(0, p->id));
   grpc_chttp2_initiate_write(exec_ctx, t, true, "send_ping");
 }
 
@@ -1217,7 +1259,7 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
 }
 
 static void send_goaway(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
-                        grpc_chttp2_error_code error, gpr_slice data) {
+                        grpc_chttp2_error_code error, grpc_slice data) {
   t->sent_goaway_state = GRPC_CHTTP2_GOAWAY_SEND_SCHEDULED;
   grpc_chttp2_goaway_append(t->last_new_stream_id, (uint32_t)error, data,
                             &t->qbuf);
@@ -1240,7 +1282,7 @@ static void perform_transport_op_locked(grpc_exec_ctx *exec_ctx,
   if (op->send_goaway) {
     send_goaway(exec_ctx, t,
                 grpc_chttp2_grpc_status_to_http2_error(op->goaway_status),
-                gpr_slice_ref(*op->goaway_message));
+                grpc_slice_ref(*op->goaway_message));
   }
 
   if (op->set_accept_stream) {
@@ -1429,7 +1471,7 @@ void grpc_chttp2_cancel_stream(grpc_exec_ctx *exec_ctx,
                             &grpc_status);
 
     if (s->id != 0) {
-      gpr_slice_buffer_add(
+      grpc_slice_buffer_add(
           &t->qbuf, grpc_chttp2_rst_stream_create(s->id, (uint32_t)http_error,
                                                   &s->stats.outgoing));
       grpc_chttp2_initiate_write(exec_ctx, t, false, "rst_stream");
@@ -1442,7 +1484,7 @@ void grpc_chttp2_cancel_stream(grpc_exec_ctx *exec_ctx,
       free_msg = true;
       msg = grpc_error_string(due_to_error);
     }
-    gpr_slice msg_slice = gpr_slice_from_copied_string(msg);
+    grpc_slice msg_slice = grpc_slice_from_copied_string(msg);
     grpc_chttp2_fake_status(exec_ctx, t, s, grpc_status, &msg_slice);
     if (free_msg) grpc_error_free_string(msg);
   }
@@ -1455,7 +1497,7 @@ void grpc_chttp2_cancel_stream(grpc_exec_ctx *exec_ctx,
 
 void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                              grpc_chttp2_stream *s, grpc_status_code status,
-                             gpr_slice *slice) {
+                             grpc_slice *slice) {
   if (status != GRPC_STATUS_OK) {
     s->seen_error = true;
   }
@@ -1478,13 +1520,13 @@ void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
           &s->metadata_buffer[1],
           grpc_mdelem_from_metadata_strings(
               GRPC_MDSTR_GRPC_MESSAGE,
-              grpc_mdstr_from_slice(gpr_slice_ref(*slice))));
+              grpc_mdstr_from_slice(grpc_slice_ref(*slice))));
     }
     s->published_metadata[1] = GRPC_METADATA_SYNTHESIZED_FROM_FAKE;
     grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
   }
   if (slice) {
-    gpr_slice_unref(*slice);
+    grpc_slice_unref(*slice);
   }
 }
 
@@ -1514,18 +1556,22 @@ static grpc_error *removal_error(grpc_error *extra_error, grpc_chttp2_stream *s,
   return error;
 }
 
-static void fail_pending_writes(grpc_exec_ctx *exec_ctx,
-                                grpc_chttp2_transport *t, grpc_chttp2_stream *s,
-                                grpc_error *error) {
+void grpc_chttp2_fail_pending_writes(grpc_exec_ctx *exec_ctx,
+                                     grpc_chttp2_transport *t,
+                                     grpc_chttp2_stream *s, grpc_error *error) {
   error =
       removal_error(error, s, "Pending writes failed due to stream closure");
-  s->fetching_send_message = NULL;
+  s->send_initial_metadata = NULL;
   grpc_chttp2_complete_closure_step(
       exec_ctx, t, s, &s->send_initial_metadata_finished, GRPC_ERROR_REF(error),
       "send_initial_metadata_finished");
+
+  s->send_trailing_metadata = NULL;
   grpc_chttp2_complete_closure_step(
       exec_ctx, t, s, &s->send_trailing_metadata_finished,
       GRPC_ERROR_REF(error), "send_trailing_metadata_finished");
+
+  s->fetching_send_message = NULL;
   grpc_chttp2_complete_closure_step(
       exec_ctx, t, s, &s->fetching_send_message_finished, GRPC_ERROR_REF(error),
       "fetching_send_message_finished");
@@ -1566,13 +1612,16 @@ void grpc_chttp2_mark_stream_closed(grpc_exec_ctx *exec_ctx,
   if (close_writes && !s->write_closed) {
     s->write_closed_error = GRPC_ERROR_REF(error);
     s->write_closed = true;
-    fail_pending_writes(exec_ctx, t, s, GRPC_ERROR_REF(error));
+    grpc_chttp2_fail_pending_writes(exec_ctx, t, s, GRPC_ERROR_REF(error));
     grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
   }
   if (s->read_closed && s->write_closed) {
     if (s->id != 0) {
       remove_stream(exec_ctx, t, s->id,
                     removal_error(GRPC_ERROR_REF(error), s, "Stream removed"));
+    } else {
+      /* Purge streams waiting on concurrency still waiting for id assignment */
+      grpc_chttp2_list_remove_waiting_for_concurrency(t, s);
     }
     GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2");
   }
@@ -1581,9 +1630,9 @@ void grpc_chttp2_mark_stream_closed(grpc_exec_ctx *exec_ctx,
 
 static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                            grpc_chttp2_stream *s, grpc_error *error) {
-  gpr_slice hdr;
-  gpr_slice status_hdr;
-  gpr_slice message_pfx;
+  grpc_slice hdr;
+  grpc_slice status_hdr;
+  grpc_slice message_pfx;
   uint8_t *p;
   uint32_t len = 0;
   grpc_status_code grpc_status;
@@ -1602,8 +1651,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
        time we got around to sending this, so instead we ignore HPACK
        compression
        and just write the uncompressed bytes onto the wire. */
-    status_hdr = gpr_slice_malloc(15 + (grpc_status >= 10));
-    p = GPR_SLICE_START_PTR(status_hdr);
+    status_hdr = grpc_slice_malloc(15 + (grpc_status >= 10));
+    p = GRPC_SLICE_START_PTR(status_hdr);
     *p++ = 0x40; /* literal header */
     *p++ = 11;   /* len(grpc-status) */
     *p++ = 'g';
@@ -1625,8 +1674,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
       *p++ = (uint8_t)('0' + (grpc_status / 10));
       *p++ = (uint8_t)('0' + (grpc_status % 10));
     }
-    GPR_ASSERT(p == GPR_SLICE_END_PTR(status_hdr));
-    len += (uint32_t)GPR_SLICE_LENGTH(status_hdr);
+    GPR_ASSERT(p == GRPC_SLICE_END_PTR(status_hdr));
+    len += (uint32_t)GRPC_SLICE_LENGTH(status_hdr);
 
     const char *optional_message =
         grpc_error_get_str(error, GRPC_ERROR_STR_GRPC_MESSAGE);
@@ -1634,8 +1683,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     if (optional_message != NULL) {
       size_t msg_len = strlen(optional_message);
       GPR_ASSERT(msg_len < 127);
-      message_pfx = gpr_slice_malloc(15);
-      p = GPR_SLICE_START_PTR(message_pfx);
+      message_pfx = grpc_slice_malloc(15);
+      p = GRPC_SLICE_START_PTR(message_pfx);
       *p++ = 0x40;
       *p++ = 12; /* len(grpc-message) */
       *p++ = 'g';
@@ -1651,13 +1700,13 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
       *p++ = 'g';
       *p++ = 'e';
       *p++ = (uint8_t)msg_len;
-      GPR_ASSERT(p == GPR_SLICE_END_PTR(message_pfx));
-      len += (uint32_t)GPR_SLICE_LENGTH(message_pfx);
+      GPR_ASSERT(p == GRPC_SLICE_END_PTR(message_pfx));
+      len += (uint32_t)GRPC_SLICE_LENGTH(message_pfx);
       len += (uint32_t)msg_len;
     }
 
-    hdr = gpr_slice_malloc(9);
-    p = GPR_SLICE_START_PTR(hdr);
+    hdr = grpc_slice_malloc(9);
+    p = GRPC_SLICE_START_PTR(hdr);
     *p++ = (uint8_t)(len >> 16);
     *p++ = (uint8_t)(len >> 8);
     *p++ = (uint8_t)(len);
@@ -1667,16 +1716,16 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     *p++ = (uint8_t)(s->id >> 16);
     *p++ = (uint8_t)(s->id >> 8);
     *p++ = (uint8_t)(s->id);
-    GPR_ASSERT(p == GPR_SLICE_END_PTR(hdr));
+    GPR_ASSERT(p == GRPC_SLICE_END_PTR(hdr));
 
-    gpr_slice_buffer_add(&t->qbuf, hdr);
-    gpr_slice_buffer_add(&t->qbuf, status_hdr);
+    grpc_slice_buffer_add(&t->qbuf, hdr);
+    grpc_slice_buffer_add(&t->qbuf, status_hdr);
     if (optional_message) {
-      gpr_slice_buffer_add(&t->qbuf, message_pfx);
-      gpr_slice_buffer_add(&t->qbuf,
-                           gpr_slice_from_copied_string(optional_message));
+      grpc_slice_buffer_add(&t->qbuf, message_pfx);
+      grpc_slice_buffer_add(&t->qbuf,
+                            grpc_slice_from_copied_string(optional_message));
     }
-    gpr_slice_buffer_add(
+    grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_CHTTP2_NO_ERROR,
                                                 &s->stats.outgoing));
   }
@@ -1687,7 +1736,7 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     free_msg = true;
     msg = grpc_error_string(error);
   }
-  gpr_slice msg_slice = gpr_slice_from_copied_string(msg);
+  grpc_slice msg_slice = grpc_slice_from_copied_string(msg);
   grpc_chttp2_fake_status(exec_ctx, t, s, grpc_status, &msg_slice);
   if (free_msg) grpc_error_free_string(msg);
 
@@ -1821,7 +1870,7 @@ static void read_action_locked(grpc_exec_ctx *exec_ctx, void *tp,
     keep_reading = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "keep_reading");
   }
-  gpr_slice_buffer_reset_and_unref(&t->read_buffer);
+  grpc_slice_buffer_reset_and_unref(&t->read_buffer);
 
   if (keep_reading) {
     grpc_endpoint_read(exec_ctx, t->ep, &t->read_buffer, &t->read_action_begin);
@@ -1875,7 +1924,7 @@ static void incoming_byte_stream_unref(grpc_exec_ctx *exec_ctx,
                                        grpc_chttp2_incoming_byte_stream *bs) {
   if (gpr_unref(&bs->refs)) {
     GRPC_ERROR_UNREF(bs->error);
-    gpr_slice_buffer_destroy(&bs->slices);
+    grpc_slice_buffer_destroy(&bs->slices);
     gpr_mu_destroy(&bs->slice_mu);
     gpr_free(bs);
   }
@@ -1950,7 +1999,7 @@ static void incoming_byte_stream_next_locked(grpc_exec_ctx *exec_ctx,
   }
   gpr_mu_lock(&bs->slice_mu);
   if (bs->slices.count > 0) {
-    *bs->next_action.slice = gpr_slice_buffer_take_first(&bs->slices);
+    *bs->next_action.slice = grpc_slice_buffer_take_first(&bs->slices);
     grpc_closure_run(exec_ctx, bs->next_action.on_complete, GRPC_ERROR_NONE);
   } else if (bs->error != GRPC_ERROR_NONE) {
     grpc_closure_run(exec_ctx, bs->next_action.on_complete,
@@ -1965,7 +2014,7 @@ static void incoming_byte_stream_next_locked(grpc_exec_ctx *exec_ctx,
 
 static int incoming_byte_stream_next(grpc_exec_ctx *exec_ctx,
                                      grpc_byte_stream *byte_stream,
-                                     gpr_slice *slice, size_t max_size_hint,
+                                     grpc_slice *slice, size_t max_size_hint,
                                      grpc_closure *on_complete) {
   GPR_TIMER_BEGIN("incoming_byte_stream_next", 0);
   grpc_chttp2_incoming_byte_stream *bs =
@@ -2018,19 +2067,19 @@ static void incoming_byte_stream_publish_error(
 
 void grpc_chttp2_incoming_byte_stream_push(grpc_exec_ctx *exec_ctx,
                                            grpc_chttp2_incoming_byte_stream *bs,
-                                           gpr_slice slice) {
+                                           grpc_slice slice) {
   gpr_mu_lock(&bs->slice_mu);
-  if (bs->remaining_bytes < GPR_SLICE_LENGTH(slice)) {
+  if (bs->remaining_bytes < GRPC_SLICE_LENGTH(slice)) {
     incoming_byte_stream_publish_error(
         exec_ctx, bs, GRPC_ERROR_CREATE("Too many bytes in stream"));
   } else {
-    bs->remaining_bytes -= (uint32_t)GPR_SLICE_LENGTH(slice);
+    bs->remaining_bytes -= (uint32_t)GRPC_SLICE_LENGTH(slice);
     if (bs->on_next != NULL) {
       *bs->next = slice;
       grpc_exec_ctx_sched(exec_ctx, bs->on_next, GRPC_ERROR_NONE, NULL);
       bs->on_next = NULL;
     } else {
-      gpr_slice_buffer_add(&bs->slices, slice);
+      grpc_slice_buffer_add(&bs->slices, slice);
     }
   }
   gpr_mu_unlock(&bs->slice_mu);
@@ -2068,7 +2117,7 @@ grpc_chttp2_incoming_byte_stream *grpc_chttp2_incoming_byte_stream_create(
   incoming_byte_stream->transport = t;
   incoming_byte_stream->stream = s;
   gpr_ref(&incoming_byte_stream->stream->active_streams);
-  gpr_slice_buffer_init(&incoming_byte_stream->slices);
+  grpc_slice_buffer_init(&incoming_byte_stream->slices);
   incoming_byte_stream->on_next = NULL;
   incoming_byte_stream->is_tail = 1;
   incoming_byte_stream->error = GRPC_ERROR_NONE;
@@ -2136,7 +2185,7 @@ static void benign_reclaimer_locked(grpc_exec_ctx *exec_ctx, void *arg,
               t->peer_string);
     }
     send_goaway(exec_ctx, t, GRPC_CHTTP2_ENHANCE_YOUR_CALM,
-                gpr_slice_from_static_string("Buffers full"));
+                grpc_slice_from_static_string("Buffers full"));
   } else if (error == GRPC_ERROR_NONE && grpc_resource_quota_trace) {
     gpr_log(GPR_DEBUG,
             "HTTP2: %s - skip benign reclamation, there are still %" PRIdPTR
@@ -2266,6 +2315,14 @@ static char *chttp2_get_peer(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
   return gpr_strdup(((grpc_chttp2_transport *)t)->peer_string);
 }
 
+/*******************************************************************************
+ * MONITORING
+ */
+static grpc_endpoint *chttp2_get_endpoint(grpc_exec_ctx *exec_ctx,
+                                          grpc_transport *t) {
+  return ((grpc_chttp2_transport *)t)->ep;
+}
+
 static const grpc_transport_vtable vtable = {sizeof(grpc_chttp2_stream),
                                              "chttp2",
                                              init_stream,
@@ -2275,7 +2332,8 @@ static const grpc_transport_vtable vtable = {sizeof(grpc_chttp2_stream),
                                              perform_transport_op,
                                              destroy_stream,
                                              destroy_transport,
-                                             chttp2_get_peer};
+                                             chttp2_get_peer,
+                                             chttp2_get_endpoint};
 
 grpc_transport *grpc_create_chttp2_transport(
     grpc_exec_ctx *exec_ctx, const grpc_channel_args *channel_args,
@@ -2287,12 +2345,12 @@ grpc_transport *grpc_create_chttp2_transport(
 
 void grpc_chttp2_transport_start_reading(grpc_exec_ctx *exec_ctx,
                                          grpc_transport *transport,
-                                         gpr_slice_buffer *read_buffer) {
+                                         grpc_slice_buffer *read_buffer) {
   grpc_chttp2_transport *t = (grpc_chttp2_transport *)transport;
   GRPC_CHTTP2_REF_TRANSPORT(
       t, "reading_action"); /* matches unref inside reading_action */
   if (read_buffer != NULL) {
-    gpr_slice_buffer_move_into(read_buffer, &t->read_buffer);
+    grpc_slice_buffer_move_into(read_buffer, &t->read_buffer);
     gpr_free(read_buffer);
   }
   read_action_begin(exec_ctx, t, GRPC_ERROR_NONE);
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.h b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
index 4e2d0954bf..c372174f2d 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.h
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
@@ -48,6 +48,6 @@ grpc_transport *grpc_create_chttp2_transport(
 /// leftover bytes previously read from the endpoint (e.g., by handshakers).
 void grpc_chttp2_transport_start_reading(grpc_exec_ctx *exec_ctx,
                                          grpc_transport *transport,
-                                         gpr_slice_buffer *read_buffer);
+                                         grpc_slice_buffer *read_buffer);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame.h b/src/core/ext/transport/chttp2/transport/frame.h
index 1e444a91fd..ffd4d9669b 100644
--- a/src/core/ext/transport/chttp2/transport/frame.h
+++ b/src/core/ext/transport/chttp2/transport/frame.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_H
 
+#include <grpc/slice.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
 
 #include "src/core/lib/iomgr/error.h"
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.c b/src/core/ext/transport/chttp2/transport/frame_data.c
index 8668816930..f9b9e1b309 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.c
+++ b/src/core/ext/transport/chttp2/transport/frame_data.c
@@ -40,6 +40,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 #include "src/core/ext/transport/chttp2/transport/internal.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/transport.h"
 
@@ -112,16 +113,16 @@ grpc_byte_stream *grpc_chttp2_incoming_frame_queue_pop(
   return out;
 }
 
-void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
+void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer *inbuf,
                              uint32_t write_bytes, int is_eof,
                              grpc_transport_one_way_stats *stats,
-                             gpr_slice_buffer *outbuf) {
-  gpr_slice hdr;
+                             grpc_slice_buffer *outbuf) {
+  grpc_slice hdr;
   uint8_t *p;
   static const size_t header_size = 9;
 
-  hdr = gpr_slice_malloc(header_size);
-  p = GPR_SLICE_START_PTR(hdr);
+  hdr = grpc_slice_malloc(header_size);
+  p = GRPC_SLICE_START_PTR(hdr);
   GPR_ASSERT(write_bytes < (1 << 24));
   *p++ = (uint8_t)(write_bytes >> 16);
   *p++ = (uint8_t)(write_bytes >> 8);
@@ -132,9 +133,9 @@ void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
   *p++ = (uint8_t)(id >> 16);
   *p++ = (uint8_t)(id >> 8);
   *p++ = (uint8_t)(id);
-  gpr_slice_buffer_add(outbuf, hdr);
+  grpc_slice_buffer_add(outbuf, hdr);
 
-  gpr_slice_buffer_move_first(inbuf, write_bytes, outbuf);
+  grpc_slice_buffer_move_first(inbuf, write_bytes, outbuf);
 
   stats->framing_bytes += header_size;
   stats->data_bytes += write_bytes;
@@ -143,9 +144,9 @@ void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
 static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
                                grpc_chttp2_data_parser *p,
                                grpc_chttp2_transport *t, grpc_chttp2_stream *s,
-                               gpr_slice slice) {
-  uint8_t *const beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *const end = GPR_SLICE_END_PTR(slice);
+                               grpc_slice slice) {
+  uint8_t *const beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *const end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   uint32_t message_flags;
   grpc_chttp2_incoming_byte_stream *incoming_byte_stream;
@@ -176,7 +177,7 @@ static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
           p->error = grpc_error_set_int(p->error, GRPC_ERROR_INT_STREAM_ID,
                                         (intptr_t)s->id);
           gpr_free(msg);
-          msg = gpr_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
+          msg = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
           p->error =
               grpc_error_set_str(p->error, GRPC_ERROR_STR_RAW_BYTES, msg);
           gpr_free(msg);
@@ -236,7 +237,7 @@ static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
         s->stats.incoming.data_bytes += p->frame_size;
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
-            gpr_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
+            grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
         grpc_chttp2_incoming_byte_stream_finished(exec_ctx, p->parsing_frame,
                                                   GRPC_ERROR_NONE);
         p->parsing_frame = NULL;
@@ -246,8 +247,8 @@ static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
         s->stats.incoming.data_bytes += p->frame_size;
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
-            gpr_slice_sub(slice, (size_t)(cur - beg),
-                          (size_t)(cur + p->frame_size - beg)));
+            grpc_slice_sub(slice, (size_t)(cur - beg),
+                           (size_t)(cur + p->frame_size - beg)));
         grpc_chttp2_incoming_byte_stream_finished(exec_ctx, p->parsing_frame,
                                                   GRPC_ERROR_NONE);
         p->parsing_frame = NULL;
@@ -257,7 +258,7 @@ static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
         GPR_ASSERT(remaining <= p->frame_size);
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
-            gpr_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
+            grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
         p->frame_size -= remaining;
         s->stats.incoming.data_bytes += remaining;
         return GRPC_ERROR_NONE;
@@ -270,7 +271,7 @@ static grpc_error *parse_inner(grpc_exec_ctx *exec_ctx,
 grpc_error *grpc_chttp2_data_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
                                           grpc_chttp2_transport *t,
                                           grpc_chttp2_stream *s,
-                                          gpr_slice slice, int is_last) {
+                                          grpc_slice slice, int is_last) {
   grpc_chttp2_data_parser *p = parser;
   grpc_error *error = parse_inner(exec_ctx, p, t, s, slice);
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.h b/src/core/ext/transport/chttp2/transport/frame_data.h
index eb2d97d898..264ad14608 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.h
+++ b/src/core/ext/transport/chttp2/transport/frame_data.h
@@ -36,8 +36,8 @@
 
 /* Parser for GRPC streams embedded in DATA frames */
 
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/transport/byte_stream.h"
@@ -94,11 +94,11 @@ grpc_error *grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser *parser,
 grpc_error *grpc_chttp2_data_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
                                           grpc_chttp2_transport *t,
                                           grpc_chttp2_stream *s,
-                                          gpr_slice slice, int is_last);
+                                          grpc_slice slice, int is_last);
 
-void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
+void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer *inbuf,
                              uint32_t write_bytes, int is_eof,
                              grpc_transport_one_way_stats *stats,
-                             gpr_slice_buffer *outbuf);
+                             grpc_slice_buffer *outbuf);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.c b/src/core/ext/transport/chttp2/transport/frame_goaway.c
index 33d2269169..d99d486c1b 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.c
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.c
@@ -71,9 +71,9 @@ grpc_error *grpc_chttp2_goaway_parser_parse(grpc_exec_ctx *exec_ctx,
                                             void *parser,
                                             grpc_chttp2_transport *t,
                                             grpc_chttp2_stream *s,
-                                            gpr_slice slice, int is_last) {
-  uint8_t *const beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *const end = GPR_SLICE_END_PTR(slice);
+                                            grpc_slice slice, int is_last) {
+  uint8_t *const beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *const end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   grpc_chttp2_goaway_parser *p = parser;
 
@@ -151,7 +151,7 @@ grpc_error *grpc_chttp2_goaway_parser_parse(grpc_exec_ctx *exec_ctx,
       if (is_last) {
         grpc_chttp2_add_incoming_goaway(
             exec_ctx, t, (uint32_t)p->error_code,
-            gpr_slice_new(p->debug_data, p->debug_length, gpr_free));
+            grpc_slice_new(p->debug_data, p->debug_length, gpr_free));
         p->debug_data = NULL;
       }
       return GRPC_ERROR_NONE;
@@ -160,13 +160,13 @@ grpc_error *grpc_chttp2_goaway_parser_parse(grpc_exec_ctx *exec_ctx,
 }
 
 void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
-                               gpr_slice debug_data,
-                               gpr_slice_buffer *slice_buffer) {
-  gpr_slice header = gpr_slice_malloc(9 + 4 + 4);
-  uint8_t *p = GPR_SLICE_START_PTR(header);
+                               grpc_slice debug_data,
+                               grpc_slice_buffer *slice_buffer) {
+  grpc_slice header = grpc_slice_malloc(9 + 4 + 4);
+  uint8_t *p = GRPC_SLICE_START_PTR(header);
   uint32_t frame_length;
-  GPR_ASSERT(GPR_SLICE_LENGTH(debug_data) < UINT32_MAX - 4 - 4);
-  frame_length = 4 + 4 + (uint32_t)GPR_SLICE_LENGTH(debug_data);
+  GPR_ASSERT(GRPC_SLICE_LENGTH(debug_data) < UINT32_MAX - 4 - 4);
+  frame_length = 4 + 4 + (uint32_t)GRPC_SLICE_LENGTH(debug_data);
 
   /* frame header: length */
   *p++ = (uint8_t)(frame_length >> 16);
@@ -191,7 +191,7 @@ void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
   *p++ = (uint8_t)(error_code >> 16);
   *p++ = (uint8_t)(error_code >> 8);
   *p++ = (uint8_t)(error_code);
-  GPR_ASSERT(p == GPR_SLICE_END_PTR(header));
-  gpr_slice_buffer_add(slice_buffer, header);
-  gpr_slice_buffer_add(slice_buffer, debug_data);
+  GPR_ASSERT(p == GRPC_SLICE_END_PTR(header));
+  grpc_slice_buffer_add(slice_buffer, header);
+  grpc_slice_buffer_add(slice_buffer, debug_data);
 }
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.h b/src/core/ext/transport/chttp2/transport/frame_goaway.h
index 355104a5a7..21fe819488 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.h
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.h
@@ -34,9 +34,9 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
 
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 
@@ -69,10 +69,10 @@ grpc_error *grpc_chttp2_goaway_parser_parse(grpc_exec_ctx *exec_ctx,
                                             void *parser,
                                             grpc_chttp2_transport *t,
                                             grpc_chttp2_stream *s,
-                                            gpr_slice slice, int is_last);
+                                            grpc_slice slice, int is_last);
 
 void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
-                               gpr_slice debug_data,
-                               gpr_slice_buffer *slice_buffer);
+                               grpc_slice debug_data,
+                               grpc_slice_buffer *slice_buffer);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.c b/src/core/ext/transport/chttp2/transport/frame_ping.c
index 624f42649d..7de5f6362d 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.c
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.c
@@ -40,9 +40,9 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
-gpr_slice grpc_chttp2_ping_create(uint8_t ack, uint8_t *opaque_8bytes) {
-  gpr_slice slice = gpr_slice_malloc(9 + 8);
-  uint8_t *p = GPR_SLICE_START_PTR(slice);
+grpc_slice grpc_chttp2_ping_create(uint8_t ack, uint8_t *opaque_8bytes) {
+  grpc_slice slice = grpc_slice_malloc(9 + 8);
+  uint8_t *p = GRPC_SLICE_START_PTR(slice);
 
   *p++ = 0;
   *p++ = 0;
@@ -76,9 +76,9 @@ grpc_error *grpc_chttp2_ping_parser_begin_frame(grpc_chttp2_ping_parser *parser,
 grpc_error *grpc_chttp2_ping_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
                                           grpc_chttp2_transport *t,
                                           grpc_chttp2_stream *s,
-                                          gpr_slice slice, int is_last) {
-  uint8_t *const beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *const end = GPR_SLICE_END_PTR(slice);
+                                          grpc_slice slice, int is_last) {
+  uint8_t *const beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *const end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   grpc_chttp2_ping_parser *p = parser;
 
@@ -93,8 +93,8 @@ grpc_error *grpc_chttp2_ping_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
     if (p->is_ack) {
       grpc_chttp2_ack_ping(exec_ctx, t, p->opaque_8bytes);
     } else {
-      gpr_slice_buffer_add(&t->qbuf,
-                           grpc_chttp2_ping_create(1, p->opaque_8bytes));
+      grpc_slice_buffer_add(&t->qbuf,
+                            grpc_chttp2_ping_create(1, p->opaque_8bytes));
       grpc_chttp2_initiate_write(exec_ctx, t, false, "ping response");
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.h b/src/core/ext/transport/chttp2/transport/frame_ping.h
index 2071f647fb..b9889e2d11 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.h
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 
@@ -44,13 +44,13 @@ typedef struct {
   uint8_t opaque_8bytes[8];
 } grpc_chttp2_ping_parser;
 
-gpr_slice grpc_chttp2_ping_create(uint8_t ack, uint8_t *opaque_8bytes);
+grpc_slice grpc_chttp2_ping_create(uint8_t ack, uint8_t *opaque_8bytes);
 
 grpc_error *grpc_chttp2_ping_parser_begin_frame(grpc_chttp2_ping_parser *parser,
                                                 uint32_t length, uint8_t flags);
 grpc_error *grpc_chttp2_ping_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
                                           grpc_chttp2_transport *t,
                                           grpc_chttp2_stream *s,
-                                          gpr_slice slice, int is_last);
+                                          grpc_slice slice, int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
index 9eac050797..b4c5ed769b 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
@@ -42,12 +42,12 @@
 #include "src/core/ext/transport/chttp2/transport/http2_errors.h"
 #include "src/core/ext/transport/chttp2/transport/status_conversion.h"
 
-gpr_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code,
-                                        grpc_transport_one_way_stats *stats) {
+grpc_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code,
+                                         grpc_transport_one_way_stats *stats) {
   static const size_t frame_size = 13;
-  gpr_slice slice = gpr_slice_malloc(frame_size);
+  grpc_slice slice = grpc_slice_malloc(frame_size);
   stats->framing_bytes += frame_size;
-  uint8_t *p = GPR_SLICE_START_PTR(slice);
+  uint8_t *p = GRPC_SLICE_START_PTR(slice);
 
   // Frame size.
   *p++ = 0;
@@ -89,9 +89,9 @@ grpc_error *grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx *exec_ctx,
                                                 void *parser,
                                                 grpc_chttp2_transport *t,
                                                 grpc_chttp2_stream *s,
-                                                gpr_slice slice, int is_last) {
-  uint8_t *const beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *const end = GPR_SLICE_END_PTR(slice);
+                                                grpc_slice slice, int is_last) {
+  uint8_t *const beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *const end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   grpc_chttp2_rst_stream_parser *p = parser;
 
@@ -117,7 +117,7 @@ grpc_error *grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx *exec_ctx,
       char *status_details;
       gpr_asprintf(&status_details, "Received RST_STREAM with error code %d",
                    reason);
-      gpr_slice slice_details = gpr_slice_from_copied_string(status_details);
+      grpc_slice slice_details = grpc_slice_from_copied_string(status_details);
       gpr_free(status_details);
       grpc_chttp2_fake_status(exec_ctx, t, s, status_code, &slice_details);
     }
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
index 5a1f578a29..779507a617 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/transport/transport.h"
@@ -44,8 +44,8 @@ typedef struct {
   uint8_t reason_bytes[4];
 } grpc_chttp2_rst_stream_parser;
 
-gpr_slice grpc_chttp2_rst_stream_create(uint32_t stream_id, uint32_t code,
-                                        grpc_transport_one_way_stats *stats);
+grpc_slice grpc_chttp2_rst_stream_create(uint32_t stream_id, uint32_t code,
+                                         grpc_transport_one_way_stats *stats);
 
 grpc_error *grpc_chttp2_rst_stream_parser_begin_frame(
     grpc_chttp2_rst_stream_parser *parser, uint32_t length, uint8_t flags);
@@ -53,6 +53,6 @@ grpc_error *grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx *exec_ctx,
                                                 void *parser,
                                                 grpc_chttp2_transport *t,
                                                 grpc_chttp2_stream *s,
-                                                gpr_slice slice, int is_last);
+                                                grpc_slice slice, int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.c b/src/core/ext/transport/chttp2/transport/frame_settings.c
index 92022f90c9..98facae87f 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.c
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.c
@@ -82,19 +82,19 @@ static uint8_t *fill_header(uint8_t *out, uint32_t length, uint8_t flags) {
   return out;
 }
 
-gpr_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
-                                      uint32_t force_mask, size_t count) {
+grpc_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
+                                       uint32_t force_mask, size_t count) {
   size_t i;
   uint32_t n = 0;
-  gpr_slice output;
+  grpc_slice output;
   uint8_t *p;
 
   for (i = 0; i < count; i++) {
     n += (new[i] != old[i] || (force_mask & (1u << i)) != 0);
   }
 
-  output = gpr_slice_malloc(9 + 6 * n);
-  p = fill_header(GPR_SLICE_START_PTR(output), 6 * n, 0);
+  output = grpc_slice_malloc(9 + 6 * n);
+  p = fill_header(GRPC_SLICE_START_PTR(output), 6 * n, 0);
 
   for (i = 0; i < count; i++) {
     if (new[i] != old[i] || (force_mask & (1u << i)) != 0) {
@@ -109,14 +109,14 @@ gpr_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
     }
   }
 
-  GPR_ASSERT(p == GPR_SLICE_END_PTR(output));
+  GPR_ASSERT(p == GRPC_SLICE_END_PTR(output));
 
   return output;
 }
 
-gpr_slice grpc_chttp2_settings_ack_create(void) {
-  gpr_slice output = gpr_slice_malloc(9);
-  fill_header(GPR_SLICE_START_PTR(output), 0, GRPC_CHTTP2_FLAG_ACK);
+grpc_slice grpc_chttp2_settings_ack_create(void) {
+  grpc_slice output = grpc_slice_malloc(9);
+  fill_header(GRPC_SLICE_START_PTR(output), 0, GRPC_CHTTP2_FLAG_ACK);
   return output;
 }
 
@@ -146,10 +146,10 @@ grpc_error *grpc_chttp2_settings_parser_begin_frame(
 grpc_error *grpc_chttp2_settings_parser_parse(grpc_exec_ctx *exec_ctx, void *p,
                                               grpc_chttp2_transport *t,
                                               grpc_chttp2_stream *s,
-                                              gpr_slice slice, int is_last) {
+                                              grpc_slice slice, int is_last) {
   grpc_chttp2_settings_parser *parser = p;
-  const uint8_t *cur = GPR_SLICE_START_PTR(slice);
-  const uint8_t *end = GPR_SLICE_END_PTR(slice);
+  const uint8_t *cur = GRPC_SLICE_START_PTR(slice);
+  const uint8_t *end = GRPC_SLICE_END_PTR(slice);
   char *msg;
 
   if (parser->is_ack) {
@@ -164,7 +164,7 @@ grpc_error *grpc_chttp2_settings_parser_parse(grpc_exec_ctx *exec_ctx, void *p,
           if (is_last) {
             memcpy(parser->target_settings, parser->incoming_settings,
                    GRPC_CHTTP2_NUM_SETTINGS * sizeof(uint32_t));
-            gpr_slice_buffer_add(&t->qbuf, grpc_chttp2_settings_ack_create());
+            grpc_slice_buffer_add(&t->qbuf, grpc_chttp2_settings_ack_create());
           }
           return GRPC_ERROR_NONE;
         }
@@ -225,7 +225,7 @@ grpc_error *grpc_chttp2_settings_parser_parse(grpc_exec_ctx *exec_ctx, void *p,
               case GRPC_CHTTP2_DISCONNECT_ON_INVALID_VALUE:
                 grpc_chttp2_goaway_append(
                     t->last_new_stream_id, sp->error_value,
-                    gpr_slice_from_static_string("HTTP2 settings error"),
+                    grpc_slice_from_static_string("HTTP2 settings error"),
                     &t->qbuf);
                 gpr_asprintf(&msg, "invalid value %u passed for %s",
                              parser->value, sp->name);
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.h b/src/core/ext/transport/chttp2/transport/frame_settings.h
index 4bfa944cf1..a29dc82106 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.h
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
 
+#include <grpc/slice.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 
@@ -87,10 +87,10 @@ extern const grpc_chttp2_setting_parameters
     grpc_chttp2_settings_parameters[GRPC_CHTTP2_NUM_SETTINGS];
 
 /* Create a settings frame by diffing old & new, and updating old to be new */
-gpr_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
-                                      uint32_t force_mask, size_t count);
+grpc_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
+                                       uint32_t force_mask, size_t count);
 /* Create an ack settings frame */
-gpr_slice grpc_chttp2_settings_ack_create(void);
+grpc_slice grpc_chttp2_settings_ack_create(void);
 
 grpc_error *grpc_chttp2_settings_parser_begin_frame(
     grpc_chttp2_settings_parser *parser, uint32_t length, uint8_t flags,
@@ -99,6 +99,6 @@ grpc_error *grpc_chttp2_settings_parser_parse(grpc_exec_ctx *exec_ctx,
                                               void *parser,
                                               grpc_chttp2_transport *t,
                                               grpc_chttp2_stream *s,
-                                              gpr_slice slice, int is_last);
+                                              grpc_slice slice, int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H */
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.c b/src/core/ext/transport/chttp2/transport/frame_window_update.c
index 1d1669beb2..83901f8d95 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.c
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.c
@@ -38,12 +38,12 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
-gpr_slice grpc_chttp2_window_update_create(
+grpc_slice grpc_chttp2_window_update_create(
     uint32_t id, uint32_t window_update, grpc_transport_one_way_stats *stats) {
   static const size_t frame_size = 13;
-  gpr_slice slice = gpr_slice_malloc(frame_size);
+  grpc_slice slice = grpc_slice_malloc(frame_size);
   stats->header_bytes += frame_size;
-  uint8_t *p = GPR_SLICE_START_PTR(slice);
+  uint8_t *p = GRPC_SLICE_START_PTR(slice);
 
   GPR_ASSERT(window_update);
 
@@ -81,9 +81,9 @@ grpc_error *grpc_chttp2_window_update_parser_begin_frame(
 
 grpc_error *grpc_chttp2_window_update_parser_parse(
     grpc_exec_ctx *exec_ctx, void *parser, grpc_chttp2_transport *t,
-    grpc_chttp2_stream *s, gpr_slice slice, int is_last) {
-  uint8_t *const beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *const end = GPR_SLICE_END_PTR(slice);
+    grpc_chttp2_stream *s, grpc_slice slice, int is_last) {
+  uint8_t *const beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *const end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   grpc_chttp2_window_update_parser *p = parser;
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.h b/src/core/ext/transport/chttp2/transport/frame_window_update.h
index 6e62f31872..f75dfb3d87 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.h
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/transport/transport.h"
@@ -45,13 +45,13 @@ typedef struct {
   uint32_t amount;
 } grpc_chttp2_window_update_parser;
 
-gpr_slice grpc_chttp2_window_update_create(uint32_t id, uint32_t window_delta,
-                                           grpc_transport_one_way_stats *stats);
+grpc_slice grpc_chttp2_window_update_create(
+    uint32_t id, uint32_t window_delta, grpc_transport_one_way_stats *stats);
 
 grpc_error *grpc_chttp2_window_update_parser_begin_frame(
     grpc_chttp2_window_update_parser *parser, uint32_t length, uint8_t flags);
 grpc_error *grpc_chttp2_window_update_parser_parse(
     grpc_exec_ctx *exec_ctx, void *parser, grpc_chttp2_transport *t,
-    grpc_chttp2_stream *s, gpr_slice slice, int is_last);
+    grpc_chttp2_stream *s, grpc_slice slice, int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
index 581471ba02..eb68fe3138 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
@@ -76,7 +76,7 @@ typedef struct {
   uint8_t seen_regular_header;
   /* output stream id */
   uint32_t stream_id;
-  gpr_slice_buffer *output;
+  grpc_slice_buffer *output;
   grpc_transport_one_way_stats *stats;
   /* maximum size of a frame */
   size_t max_frame_size;
@@ -104,7 +104,7 @@ static void finish_frame(framer_state *st, int is_header_boundary,
   type = st->is_first_frame ? GRPC_CHTTP2_FRAME_HEADER
                             : GRPC_CHTTP2_FRAME_CONTINUATION;
   fill_header(
-      GPR_SLICE_START_PTR(st->output->slices[st->header_idx]), type,
+      GRPC_SLICE_START_PTR(st->output->slices[st->header_idx]), type,
       st->stream_id, st->output->length - st->output_length_at_start_of_frame,
       (uint8_t)((is_last_in_stream ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0) |
                 (is_header_boundary ? GRPC_CHTTP2_DATA_FLAG_END_HEADERS : 0)));
@@ -116,7 +116,7 @@ static void finish_frame(framer_state *st, int is_header_boundary,
    output before beginning */
 static void begin_frame(framer_state *st) {
   st->header_idx =
-      gpr_slice_buffer_add_indexed(st->output, gpr_slice_malloc(9));
+      grpc_slice_buffer_add_indexed(st->output, grpc_slice_malloc(9));
   st->output_length_at_start_of_frame = st->output->length;
 }
 
@@ -147,18 +147,18 @@ static void inc_filter(uint8_t idx, uint32_t *sum, uint8_t *elems) {
   }
 }
 
-static void add_header_data(framer_state *st, gpr_slice slice) {
-  size_t len = GPR_SLICE_LENGTH(slice);
+static void add_header_data(framer_state *st, grpc_slice slice) {
+  size_t len = GRPC_SLICE_LENGTH(slice);
   size_t remaining;
   if (len == 0) return;
   remaining = st->max_frame_size + st->output_length_at_start_of_frame -
               st->output->length;
   if (len <= remaining) {
     st->stats->header_bytes += len;
-    gpr_slice_buffer_add(st->output, slice);
+    grpc_slice_buffer_add(st->output, slice);
   } else {
     st->stats->header_bytes += remaining;
-    gpr_slice_buffer_add(st->output, gpr_slice_split_head(&slice, remaining));
+    grpc_slice_buffer_add(st->output, grpc_slice_split_head(&slice, remaining));
     finish_frame(st, 0, 0);
     begin_frame(st);
     add_header_data(st, slice);
@@ -167,7 +167,7 @@ static void add_header_data(framer_state *st, gpr_slice slice) {
 
 static uint8_t *add_tiny_header_data(framer_state *st, size_t len) {
   ensure_space(st, len);
-  return gpr_slice_buffer_tiny_add(st->output, len);
+  return grpc_slice_buffer_tiny_add(st->output, len);
 }
 
 static void evict_entry(grpc_chttp2_hpack_compressor *c) {
@@ -268,9 +268,10 @@ static void emit_indexed(grpc_chttp2_hpack_compressor *c, uint32_t elem_index,
                            len);
 }
 
-static gpr_slice get_wire_value(grpc_mdelem *elem, uint8_t *huffman_prefix) {
-  if (grpc_is_binary_header((const char *)GPR_SLICE_START_PTR(elem->key->slice),
-                            GPR_SLICE_LENGTH(elem->key->slice))) {
+static grpc_slice get_wire_value(grpc_mdelem *elem, uint8_t *huffman_prefix) {
+  if (grpc_is_binary_header(
+          (const char *)GRPC_SLICE_START_PTR(elem->key->slice),
+          GRPC_SLICE_LENGTH(elem->key->slice))) {
     *huffman_prefix = 0x80;
     return grpc_mdstr_as_base64_encoded_and_huffman_compressed(elem->value);
   }
@@ -284,8 +285,8 @@ static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor *c,
                                framer_state *st) {
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 2);
   uint8_t huffman_prefix;
-  gpr_slice value_slice = get_wire_value(elem, &huffman_prefix);
-  size_t len_val = GPR_SLICE_LENGTH(value_slice);
+  grpc_slice value_slice = get_wire_value(elem, &huffman_prefix);
+  size_t len_val = GRPC_SLICE_LENGTH(value_slice);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
   len_val_len = GRPC_CHTTP2_VARINT_LENGTH((uint32_t)len_val, 1);
@@ -293,7 +294,7 @@ static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor *c,
                            add_tiny_header_data(st, len_pfx), len_pfx);
   GRPC_CHTTP2_WRITE_VARINT((uint32_t)len_val, 1, huffman_prefix,
                            add_tiny_header_data(st, len_val_len), len_val_len);
-  add_header_data(st, gpr_slice_ref(value_slice));
+  add_header_data(st, grpc_slice_ref(value_slice));
 }
 
 static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor *c,
@@ -301,8 +302,8 @@ static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor *c,
                               framer_state *st) {
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 4);
   uint8_t huffman_prefix;
-  gpr_slice value_slice = get_wire_value(elem, &huffman_prefix);
-  size_t len_val = GPR_SLICE_LENGTH(value_slice);
+  grpc_slice value_slice = get_wire_value(elem, &huffman_prefix);
+  size_t len_val = GRPC_SLICE_LENGTH(value_slice);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
   len_val_len = GRPC_CHTTP2_VARINT_LENGTH((uint32_t)len_val, 1);
@@ -310,45 +311,45 @@ static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor *c,
                            add_tiny_header_data(st, len_pfx), len_pfx);
   GRPC_CHTTP2_WRITE_VARINT((uint32_t)len_val, 1, huffman_prefix,
                            add_tiny_header_data(st, len_val_len), len_val_len);
-  add_header_data(st, gpr_slice_ref(value_slice));
+  add_header_data(st, grpc_slice_ref(value_slice));
 }
 
 static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor *c,
                                  grpc_mdelem *elem, framer_state *st) {
-  uint32_t len_key = (uint32_t)GPR_SLICE_LENGTH(elem->key->slice);
+  uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(elem->key->slice);
   uint8_t huffman_prefix;
-  gpr_slice value_slice = get_wire_value(elem, &huffman_prefix);
-  uint32_t len_val = (uint32_t)GPR_SLICE_LENGTH(value_slice);
+  grpc_slice value_slice = get_wire_value(elem, &huffman_prefix);
+  uint32_t len_val = (uint32_t)GRPC_SLICE_LENGTH(value_slice);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
   GPR_ASSERT(len_key <= UINT32_MAX);
-  GPR_ASSERT(GPR_SLICE_LENGTH(value_slice) <= UINT32_MAX);
+  GPR_ASSERT(GRPC_SLICE_LENGTH(value_slice) <= UINT32_MAX);
   *add_tiny_header_data(st, 1) = 0x40;
   GRPC_CHTTP2_WRITE_VARINT(len_key, 1, 0x00,
                            add_tiny_header_data(st, len_key_len), len_key_len);
-  add_header_data(st, gpr_slice_ref(elem->key->slice));
+  add_header_data(st, grpc_slice_ref(elem->key->slice));
   GRPC_CHTTP2_WRITE_VARINT(len_val, 1, huffman_prefix,
                            add_tiny_header_data(st, len_val_len), len_val_len);
-  add_header_data(st, gpr_slice_ref(value_slice));
+  add_header_data(st, grpc_slice_ref(value_slice));
 }
 
 static void emit_lithdr_noidx_v(grpc_chttp2_hpack_compressor *c,
                                 grpc_mdelem *elem, framer_state *st) {
-  uint32_t len_key = (uint32_t)GPR_SLICE_LENGTH(elem->key->slice);
+  uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(elem->key->slice);
   uint8_t huffman_prefix;
-  gpr_slice value_slice = get_wire_value(elem, &huffman_prefix);
-  uint32_t len_val = (uint32_t)GPR_SLICE_LENGTH(value_slice);
+  grpc_slice value_slice = get_wire_value(elem, &huffman_prefix);
+  uint32_t len_val = (uint32_t)GRPC_SLICE_LENGTH(value_slice);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
   GPR_ASSERT(len_key <= UINT32_MAX);
-  GPR_ASSERT(GPR_SLICE_LENGTH(value_slice) <= UINT32_MAX);
+  GPR_ASSERT(GRPC_SLICE_LENGTH(value_slice) <= UINT32_MAX);
   *add_tiny_header_data(st, 1) = 0x00;
   GRPC_CHTTP2_WRITE_VARINT(len_key, 1, 0x00,
                            add_tiny_header_data(st, len_key_len), len_key_len);
-  add_header_data(st, gpr_slice_ref(elem->key->slice));
+  add_header_data(st, grpc_slice_ref(elem->key->slice));
   GRPC_CHTTP2_WRITE_VARINT(len_val, 1, huffman_prefix,
                            add_tiny_header_data(st, len_val_len), len_val_len);
-  add_header_data(st, gpr_slice_ref(value_slice));
+  add_header_data(st, grpc_slice_ref(value_slice));
 }
 
 static void emit_advertise_table_size_change(grpc_chttp2_hpack_compressor *c,
@@ -373,8 +374,8 @@ static void hpack_enc(grpc_chttp2_hpack_compressor *c, grpc_mdelem *elem,
   uint32_t indices_key;
   int should_add_elem;
 
-  GPR_ASSERT(GPR_SLICE_LENGTH(elem->key->slice) > 0);
-  if (GPR_SLICE_START_PTR(elem->key->slice)[0] != ':') { /* regular header */
+  GPR_ASSERT(GRPC_SLICE_LENGTH(elem->key->slice) > 0);
+  if (GRPC_SLICE_START_PTR(elem->key->slice)[0] != ':') { /* regular header */
     st->seen_regular_header = 1;
   } else {
     GPR_ASSERT(
@@ -546,7 +547,7 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
                                grpc_metadata_batch *metadata, int is_eof,
                                size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
-                               gpr_slice_buffer *outbuf) {
+                               grpc_slice_buffer *outbuf) {
   framer_state st;
   grpc_linked_mdelem *l;
   gpr_timespec deadline;
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index 4c3a931549..bcbd675ca2 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -34,9 +34,9 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H
 
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/metadata_batch.h"
@@ -93,6 +93,6 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, uint32_t id,
                                grpc_metadata_batch *metadata, int is_eof,
                                size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
-                               gpr_slice_buffer *outbuf);
+                               grpc_slice_buffer *outbuf);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.c b/src/core/ext/transport/chttp2/transport/hpack_parser.c
index 8180f78fc0..6a9200b8db 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.c
@@ -50,6 +50,7 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
 
@@ -1501,9 +1502,9 @@ static grpc_error *is_binary_indexed_header(grpc_chttp2_hpack_parser *p,
                            GRPC_ERROR_INT_INDEX, (intptr_t)p->index),
         GRPC_ERROR_INT_SIZE, (intptr_t)p->table.num_ents);
   }
-  *is =
-      grpc_is_binary_header((const char *)GPR_SLICE_START_PTR(elem->key->slice),
-                            GPR_SLICE_LENGTH(elem->key->slice));
+  *is = grpc_is_binary_header(
+      (const char *)GRPC_SLICE_START_PTR(elem->key->slice),
+      GRPC_SLICE_LENGTH(elem->key->slice));
   return GRPC_ERROR_NONE;
 }
 
@@ -1578,18 +1579,32 @@ static const maybe_complete_func_type maybe_complete_funcs[] = {
     grpc_chttp2_maybe_complete_recv_initial_metadata,
     grpc_chttp2_maybe_complete_recv_trailing_metadata};
 
+static void force_client_rst_stream(grpc_exec_ctx *exec_ctx, void *sp,
+                                    grpc_error *error) {
+  grpc_chttp2_stream *s = sp;
+  grpc_chttp2_transport *t = s->t;
+  if (!s->write_closed) {
+    grpc_slice_buffer_add(
+        &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_CHTTP2_NO_ERROR,
+                                                &s->stats.outgoing));
+    grpc_chttp2_initiate_write(exec_ctx, t, false, "force_rst_stream");
+    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, GRPC_ERROR_NONE);
+  }
+  GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "final_rst");
+}
+
 grpc_error *grpc_chttp2_header_parser_parse(grpc_exec_ctx *exec_ctx,
                                             void *hpack_parser,
                                             grpc_chttp2_transport *t,
                                             grpc_chttp2_stream *s,
-                                            gpr_slice slice, int is_last) {
+                                            grpc_slice slice, int is_last) {
   grpc_chttp2_hpack_parser *parser = hpack_parser;
   GPR_TIMER_BEGIN("grpc_chttp2_hpack_parser_parse", 0);
   if (s != NULL) {
-    s->stats.incoming.header_bytes += GPR_SLICE_LENGTH(slice);
+    s->stats.incoming.header_bytes += GRPC_SLICE_LENGTH(slice);
   }
   grpc_error *error = grpc_chttp2_hpack_parser_parse(
-      exec_ctx, parser, GPR_SLICE_START_PTR(slice), GPR_SLICE_END_PTR(slice));
+      exec_ctx, parser, GRPC_SLICE_START_PTR(slice), GRPC_SLICE_END_PTR(slice));
   if (error != GRPC_ERROR_NONE) {
     GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0);
     return error;
@@ -1613,6 +1628,17 @@ grpc_error *grpc_chttp2_header_parser_parse(grpc_exec_ctx *exec_ctx,
         s->header_frames_received++;
       }
       if (parser->is_eof) {
+        if (t->is_client && !s->write_closed) {
+          /* server eof ==> complete closure; we may need to forcefully close
+             the stream. Wait until the combiner lock is ready to be released
+             however -- it might be that we receive a RST_STREAM following this
+             and can avoid the extra write */
+          GRPC_CHTTP2_STREAM_REF(s, "final_rst");
+          grpc_combiner_execute_finally(
+              exec_ctx, t->combiner,
+              grpc_closure_create(force_client_rst_stream, s), GRPC_ERROR_NONE,
+              false);
+        }
         grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false,
                                        GRPC_ERROR_NONE);
       }
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.h b/src/core/ext/transport/chttp2/transport/hpack_parser.h
index 0290c78d5a..a39bf466cd 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.h
@@ -116,6 +116,6 @@ grpc_error *grpc_chttp2_header_parser_parse(grpc_exec_ctx *exec_ctx,
                                             void *hpack_parser,
                                             grpc_chttp2_transport *t,
                                             grpc_chttp2_stream *s,
-                                            gpr_slice slice, int is_last);
+                                            grpc_slice slice, int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.c b/src/core/ext/transport/chttp2/transport/hpack_table.c
index 2b73ec969e..2dc793d304 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.c
@@ -226,8 +226,8 @@ grpc_mdelem *grpc_chttp2_hptbl_lookup(const grpc_chttp2_hptbl *tbl,
 /* Evict one element from the table */
 static void evict1(grpc_chttp2_hptbl *tbl) {
   grpc_mdelem *first_ent = tbl->ents[tbl->first_ent];
-  size_t elem_bytes = GPR_SLICE_LENGTH(first_ent->key->slice) +
-                      GPR_SLICE_LENGTH(first_ent->value->slice) +
+  size_t elem_bytes = GRPC_SLICE_LENGTH(first_ent->key->slice) +
+                      GRPC_SLICE_LENGTH(first_ent->value->slice) +
                       GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
   GPR_ASSERT(elem_bytes <= tbl->mem_used);
   tbl->mem_used -= (uint32_t)elem_bytes;
@@ -298,8 +298,8 @@ grpc_error *grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl *tbl,
 
 grpc_error *grpc_chttp2_hptbl_add(grpc_chttp2_hptbl *tbl, grpc_mdelem *md) {
   /* determine how many bytes of buffer this entry represents */
-  size_t elem_bytes = GPR_SLICE_LENGTH(md->key->slice) +
-                      GPR_SLICE_LENGTH(md->value->slice) +
+  size_t elem_bytes = GRPC_SLICE_LENGTH(md->key->slice) +
+                      GRPC_SLICE_LENGTH(md->value->slice) +
                       GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
 
   if (tbl->current_table_bytes > tbl->max_bytes) {
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.h b/src/core/ext/transport/chttp2/transport/hpack_table.h
index 45bd9255bf..2ca130e64b 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_TABLE_H
 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_TABLE_H
 
+#include <grpc/slice.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/transport/metadata.h"
 
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index c16c1f61d9..98bb46f79e 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -171,14 +171,14 @@ struct grpc_chttp2_incoming_byte_stream {
   bool is_tail;
 
   gpr_mu slice_mu;  // protects slices, on_next
-  gpr_slice_buffer slices;
+  grpc_slice_buffer slices;
   grpc_closure *on_next;
-  gpr_slice *next;
+  grpc_slice *next;
   uint32_t remaining_bytes;
 
   struct {
     grpc_closure closure;
-    gpr_slice *slice;
+    grpc_slice *slice;
     size_t max_size_hint;
     grpc_closure *on_complete;
   } next_action;
@@ -220,7 +220,7 @@ struct grpc_chttp2_transport {
   grpc_closure read_action_locked;
 
   /** incoming read bytes */
-  gpr_slice_buffer read_buffer;
+  grpc_slice_buffer read_buffer;
 
   /** address to place a newly accepted stream - set and unset by
       grpc_chttp2_parsing_accept_stream; used by init_stream to
@@ -238,7 +238,7 @@ struct grpc_chttp2_transport {
   } channel_callback;
 
   /** data to write now */
-  gpr_slice_buffer outbuf;
+  grpc_slice_buffer outbuf;
   /** hpack encoding */
   grpc_chttp2_hpack_compressor hpack_compressor;
   int64_t outgoing_window;
@@ -246,7 +246,7 @@ struct grpc_chttp2_transport {
   uint8_t is_client;
 
   /** data to write next write */
-  gpr_slice_buffer qbuf;
+  grpc_slice_buffer qbuf;
 
   /** window available to announce to peer */
   int64_t announce_incoming_window;
@@ -314,12 +314,12 @@ struct grpc_chttp2_transport {
   grpc_chttp2_stream *incoming_stream;
   grpc_error *(*parser)(grpc_exec_ctx *exec_ctx, void *parser_user_data,
                         grpc_chttp2_transport *t, grpc_chttp2_stream *s,
-                        gpr_slice slice, int is_last);
+                        grpc_slice slice, int is_last);
 
   /* goaway data */
   grpc_status_code goaway_error;
   uint32_t goaway_last_stream_index;
-  gpr_slice goaway_text;
+  grpc_slice goaway_text;
 
   grpc_chttp2_write_cb *write_cb_pool;
 
@@ -327,6 +327,9 @@ struct grpc_chttp2_transport {
    */
   grpc_error *close_transport_on_writes_finished;
 
+  /* a list of closures to run after writes are finished */
+  grpc_closure_list run_after_write;
+
   /* buffer pool state */
   /** have we scheduled a benign cleanup? */
   bool benign_reclaimer_registered;
@@ -372,7 +375,7 @@ struct grpc_chttp2_stream {
 
   grpc_byte_stream *fetching_send_message;
   uint32_t fetched_send_message_length;
-  gpr_slice fetching_slice;
+  grpc_slice fetching_slice;
   int64_t next_message_end_offset;
   int64_t flow_controlled_bytes_written;
   bool complete_fetch_covered_by_poller;
@@ -434,7 +437,7 @@ struct grpc_chttp2_stream {
   bool sent_trailing_metadata;
   /** how much window should we announce? */
   uint32_t announce_window;
-  gpr_slice_buffer flow_controlled_buffer;
+  grpc_slice_buffer flow_controlled_buffer;
 
   grpc_chttp2_write_cb *on_write_finished_cbs;
   grpc_chttp2_write_cb *finish_after_write;
@@ -466,7 +469,8 @@ void grpc_chttp2_end_write(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
 /** Process one slice of incoming data; return 1 if the connection is still
     viable after reading, or 0 if the connection should be torn down */
 grpc_error *grpc_chttp2_perform_read(grpc_exec_ctx *exec_ctx,
-                                     grpc_chttp2_transport *t, gpr_slice slice);
+                                     grpc_chttp2_transport *t,
+                                     grpc_slice slice);
 
 bool grpc_chttp2_list_add_writable_stream(grpc_chttp2_transport *t,
                                           grpc_chttp2_stream *s);
@@ -492,6 +496,8 @@ void grpc_chttp2_list_add_waiting_for_concurrency(grpc_chttp2_transport *t,
                                                   grpc_chttp2_stream *s);
 bool grpc_chttp2_list_pop_waiting_for_concurrency(grpc_chttp2_transport *t,
                                                   grpc_chttp2_stream **s);
+void grpc_chttp2_list_remove_waiting_for_concurrency(grpc_chttp2_transport *t,
+                                                     grpc_chttp2_stream *s);
 
 void grpc_chttp2_list_add_stalled_by_transport(grpc_chttp2_transport *t,
                                                grpc_chttp2_stream *s);
@@ -516,7 +522,7 @@ grpc_chttp2_stream *grpc_chttp2_parsing_accept_stream(grpc_exec_ctx *exec_ctx,
 void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx *exec_ctx,
                                      grpc_chttp2_transport *t,
                                      uint32_t goaway_error,
-                                     gpr_slice goaway_text);
+                                     grpc_slice goaway_text);
 
 void grpc_chttp2_parsing_become_skip_parser(grpc_exec_ctx *exec_ctx,
                                             grpc_chttp2_transport *t);
@@ -618,7 +624,7 @@ void grpc_chttp2_flowctl_trace(const char *file, int line, const char *phase,
 
 void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                              grpc_chttp2_stream *stream,
-                             grpc_status_code status, gpr_slice *details);
+                             grpc_status_code status, grpc_slice *details);
 void grpc_chttp2_mark_stream_closed(grpc_exec_ctx *exec_ctx,
                                     grpc_chttp2_transport *t,
                                     grpc_chttp2_stream *s, int close_reads,
@@ -666,7 +672,7 @@ grpc_chttp2_incoming_byte_stream *grpc_chttp2_incoming_byte_stream_create(
     uint32_t frame_size, uint32_t flags);
 void grpc_chttp2_incoming_byte_stream_push(grpc_exec_ctx *exec_ctx,
                                            grpc_chttp2_incoming_byte_stream *bs,
-                                           gpr_slice slice);
+                                           grpc_slice slice);
 void grpc_chttp2_incoming_byte_stream_finished(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_incoming_byte_stream *bs,
     grpc_error *error);
@@ -695,4 +701,8 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx *exec_ctx,
                                                        grpc_chttp2_transport *t,
                                                        grpc_chttp2_stream *s);
 
+void grpc_chttp2_fail_pending_writes(grpc_exec_ctx *exec_ctx,
+                                     grpc_chttp2_transport *t,
+                                     grpc_chttp2_stream *s, grpc_error *error);
+
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INTERNAL_H */
diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c
index 21e7d7927d..1cad18c9bb 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.c
+++ b/src/core/ext/transport/chttp2/transport/parsing.c
@@ -67,14 +67,14 @@ static grpc_error *init_skip_frame_parser(grpc_exec_ctx *exec_ctx,
                                           int is_header);
 
 static grpc_error *parse_frame_slice(grpc_exec_ctx *exec_ctx,
-                                     grpc_chttp2_transport *t, gpr_slice slice,
+                                     grpc_chttp2_transport *t, grpc_slice slice,
                                      int is_last);
 
 grpc_error *grpc_chttp2_perform_read(grpc_exec_ctx *exec_ctx,
                                      grpc_chttp2_transport *t,
-                                     gpr_slice slice) {
-  uint8_t *beg = GPR_SLICE_START_PTR(slice);
-  uint8_t *end = GPR_SLICE_END_PTR(slice);
+                                     grpc_slice slice) {
+  uint8_t *beg = GRPC_SLICE_START_PTR(slice);
+  uint8_t *end = GRPC_SLICE_END_PTR(slice);
   uint8_t *cur = beg;
   grpc_error *err;
 
@@ -229,10 +229,10 @@ grpc_error *grpc_chttp2_perform_read(grpc_exec_ctx *exec_ctx,
     case GRPC_DTS_FRAME:
       GPR_ASSERT(cur < end);
       if ((uint32_t)(end - cur) == t->incoming_frame_size) {
-        err = parse_frame_slice(exec_ctx, t,
-                                gpr_slice_sub_no_ref(slice, (size_t)(cur - beg),
-                                                     (size_t)(end - beg)),
-                                1);
+        err = parse_frame_slice(
+            exec_ctx, t, grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
+                                               (size_t)(end - beg)),
+            1);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
@@ -243,8 +243,8 @@ grpc_error *grpc_chttp2_perform_read(grpc_exec_ctx *exec_ctx,
         size_t cur_offset = (size_t)(cur - beg);
         err = parse_frame_slice(
             exec_ctx, t,
-            gpr_slice_sub_no_ref(slice, cur_offset,
-                                 cur_offset + t->incoming_frame_size),
+            grpc_slice_sub_no_ref(slice, cur_offset,
+                                  cur_offset + t->incoming_frame_size),
             1);
         if (err != GRPC_ERROR_NONE) {
           return err;
@@ -253,10 +253,10 @@ grpc_error *grpc_chttp2_perform_read(grpc_exec_ctx *exec_ctx,
         t->incoming_stream = NULL;
         goto dts_fh_0; /* loop */
       } else {
-        err = parse_frame_slice(exec_ctx, t,
-                                gpr_slice_sub_no_ref(slice, (size_t)(cur - beg),
-                                                     (size_t)(end - beg)),
-                                0);
+        err = parse_frame_slice(
+            exec_ctx, t, grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
+                                               (size_t)(end - beg)),
+            0);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
@@ -331,7 +331,7 @@ static grpc_error *init_frame_parser(grpc_exec_ctx *exec_ctx,
 
 static grpc_error *skip_parser(grpc_exec_ctx *exec_ctx, void *parser,
                                grpc_chttp2_transport *t, grpc_chttp2_stream *s,
-                               gpr_slice slice, int is_last) {
+                               grpc_slice slice, int is_last) {
   return GRPC_ERROR_NONE;
 }
 
@@ -440,7 +440,7 @@ error_handler:
     if (s != NULL) {
       grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false, err);
     }
-    gpr_slice_buffer_add(
+    grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(t->incoming_stream_id,
                                                 GRPC_CHTTP2_PROTOCOL_ERROR,
                                                 &s->stats.outgoing));
@@ -481,7 +481,8 @@ static void on_initial_header(grpc_exec_ctx *exec_ctx, void *tp,
                 grpc_mdstr_as_c_string(md->value));
         *cached_timeout = gpr_inf_future(GPR_TIMESPAN);
       }
-      grpc_mdelem_set_user_data(md, free_timeout, cached_timeout);
+      cached_timeout =
+          grpc_mdelem_set_user_data(md, free_timeout, cached_timeout);
     }
     grpc_chttp2_incoming_metadata_buffer_set_deadline(
         &s->metadata_buffer[0],
@@ -732,7 +733,7 @@ static grpc_error *init_settings_frame_parser(grpc_exec_ctx *exec_ctx,
 }
 
 static grpc_error *parse_frame_slice(grpc_exec_ctx *exec_ctx,
-                                     grpc_chttp2_transport *t, gpr_slice slice,
+                                     grpc_chttp2_transport *t, grpc_slice slice,
                                      int is_last) {
   grpc_chttp2_stream *s = t->incoming_stream;
   grpc_error *err = t->parser(exec_ctx, t->parser_data, t, s, slice, is_last);
@@ -747,7 +748,7 @@ static grpc_error *parse_frame_slice(grpc_exec_ctx *exec_ctx,
     grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
     if (s) {
       s->forced_close_error = err;
-      gpr_slice_buffer_add(
+      grpc_slice_buffer_add(
           &t->qbuf, grpc_chttp2_rst_stream_create(t->incoming_stream_id,
                                                   GRPC_CHTTP2_PROTOCOL_ERROR,
                                                   &s->stats.outgoing));
diff --git a/src/core/ext/transport/chttp2/transport/stream_lists.c b/src/core/ext/transport/chttp2/transport/stream_lists.c
index 6ea60a012b..078818fb18 100644
--- a/src/core/ext/transport/chttp2/transport/stream_lists.c
+++ b/src/core/ext/transport/chttp2/transport/stream_lists.c
@@ -158,6 +158,11 @@ bool grpc_chttp2_list_pop_waiting_for_concurrency(grpc_chttp2_transport *t,
   return stream_list_pop(t, s, GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
 }
 
+void grpc_chttp2_list_remove_waiting_for_concurrency(grpc_chttp2_transport *t,
+                                                     grpc_chttp2_stream *s) {
+  stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
+}
+
 void grpc_chttp2_list_add_stalled_by_transport(grpc_chttp2_transport *t,
                                                grpc_chttp2_stream *s) {
   stream_list_add(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index d9816e87e1..979acfd437 100644
--- a/src/core/ext/transport/chttp2/transport/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -80,7 +80,7 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_BEGIN("grpc_chttp2_begin_write", 0);
 
   if (t->dirtied_local_settings && !t->sent_local_settings) {
-    gpr_slice_buffer_add(
+    grpc_slice_buffer_add(
         &t->outbuf,
         grpc_chttp2_settings_create(
             t->settings[GRPC_SENT_SETTINGS], t->settings[GRPC_LOCAL_SETTINGS],
@@ -91,7 +91,7 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
   }
 
   /* simple writes are queued to qbuf, and flushed here */
-  gpr_slice_buffer_move_into(&t->qbuf, &t->outbuf);
+  grpc_slice_buffer_move_into(&t->qbuf, &t->outbuf);
   GPR_ASSERT(t->qbuf.count == 0);
 
   grpc_chttp2_hpack_compressor_set_max_table_size(
@@ -130,9 +130,9 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
     /* send any window updates */
     if (s->announce_window > 0) {
       uint32_t announce = s->announce_window;
-      gpr_slice_buffer_add(&t->outbuf,
-                           grpc_chttp2_window_update_create(
-                               s->id, s->announce_window, &s->stats.outgoing));
+      grpc_slice_buffer_add(&t->outbuf,
+                            grpc_chttp2_window_update_create(
+                                s->id, s->announce_window, &s->stats.outgoing));
       GRPC_CHTTP2_FLOW_DEBIT_STREAM("write", t, s, announce_window, announce);
     }
     if (sent_initial_metadata) {
@@ -167,9 +167,9 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
             s->send_trailing_metadata = NULL;
             s->sent_trailing_metadata = true;
             if (!t->is_client && !s->read_closed) {
-              gpr_slice_buffer_add(&t->outbuf, grpc_chttp2_rst_stream_create(
-                                                   s->id, GRPC_CHTTP2_NO_ERROR,
-                                                   &s->stats.outgoing));
+              grpc_slice_buffer_add(&t->outbuf, grpc_chttp2_rst_stream_create(
+                                                    s->id, GRPC_CHTTP2_NO_ERROR,
+                                                    &s->stats.outgoing));
             }
           }
           s->sending_bytes += send_bytes;
@@ -202,7 +202,7 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
         s->send_trailing_metadata = NULL;
         s->sent_trailing_metadata = true;
         if (!t->is_client && !s->read_closed) {
-          gpr_slice_buffer_add(
+          grpc_slice_buffer_add(
               &t->outbuf, grpc_chttp2_rst_stream_create(
                               s->id, GRPC_CHTTP2_NO_ERROR, &s->stats.outgoing));
         }
@@ -228,8 +228,8 @@ bool grpc_chttp2_begin_write(grpc_exec_ctx *exec_ctx,
     GRPC_CHTTP2_FLOW_DEBIT_TRANSPORT("write", t, announce_incoming_window,
                                      announced);
     grpc_transport_one_way_stats throwaway_stats;
-    gpr_slice_buffer_add(&t->outbuf, grpc_chttp2_window_update_create(
-                                         0, announced, &throwaway_stats));
+    grpc_slice_buffer_add(&t->outbuf, grpc_chttp2_window_update_create(
+                                          0, announced, &throwaway_stats));
   }
 
   GPR_TIMER_END("grpc_chttp2_begin_write", 0);
@@ -262,7 +262,7 @@ void grpc_chttp2_end_write(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     }
     GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:end");
   }
-  gpr_slice_buffer_reset_and_unref(&t->outbuf);
+  grpc_slice_buffer_reset_and_unref(&t->outbuf);
   GRPC_ERROR_UNREF(error);
   GPR_TIMER_END("grpc_chttp2_end_write", 0);
 }
diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.c b/src/core/ext/transport/cronet/transport/cronet_transport.c
index 25ad40b935..afc59f4b12 100644
--- a/src/core/ext/transport/cronet/transport/cronet_transport.c
+++ b/src/core/ext/transport/cronet/transport/cronet_transport.c
@@ -34,14 +34,15 @@
 #include <string.h>
 
 #include <grpc/impl/codegen/port_platform.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/ext/transport/chttp2/transport/incoming_metadata.h"
+#include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/channel.h"
@@ -130,7 +131,7 @@ struct read_state {
 
   /* vars for holding data destined for the application */
   struct grpc_slice_buffer_stream sbs;
-  gpr_slice_buffer read_slice_buffer;
+  grpc_slice_buffer read_slice_buffer;
 
   /* vars for trailing metadata */
   grpc_chttp2_incoming_metadata_buffer trailing_metadata;
@@ -148,6 +149,9 @@ struct write_state {
 struct op_state {
   bool state_op_done[OP_NUM_OPS];
   bool state_callback_received[OP_NUM_OPS];
+  bool fail_state;
+  bool flush_read;
+  grpc_error *cancel_error;
   /* data structure for storing data coming from server */
   struct read_state rs;
   /* data structure for storing data going to the server */
@@ -247,6 +251,12 @@ static void free_read_buffer(stream_obj *s) {
   }
 }
 
+static grpc_error *make_error_with_desc(int error_code, const char *desc) {
+  grpc_error *error = GRPC_ERROR_CREATE(desc);
+  error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS, error_code);
+  return error;
+}
+
 /*
   Add a new stream op to op storage.
 */
@@ -432,6 +442,18 @@ static void on_response_headers_received(
             grpc_mdstr_from_string(headers->headers[i].value)));
   }
   s->state.state_callback_received[OP_RECV_INITIAL_METADATA] = true;
+  if (!(s->state.state_op_done[OP_CANCEL_ERROR] ||
+        s->state.state_callback_received[OP_FAILED])) {
+    /* Do an extra read to trigger on_succeeded() callback in case connection
+     is closed */
+    GPR_ASSERT(s->state.rs.length_field_received == false);
+    s->state.rs.read_buffer = s->state.rs.grpc_header_bytes;
+    s->state.rs.received_bytes = 0;
+    s->state.rs.remaining_bytes = GRPC_HEADER_SIZE_IN_BYTES;
+    CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_read(%p)", s->cbs);
+    cronet_bidirectional_stream_read(s->cbs, s->state.rs.read_buffer,
+                                     s->state.rs.remaining_bytes);
+  }
   gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
@@ -463,7 +485,11 @@ static void on_read_completed(cronet_bidirectional_stream *stream, char *data,
              count);
   gpr_mu_lock(&s->mu);
   s->state.state_callback_received[OP_RECV_MESSAGE] = true;
-  if (count > 0) {
+  if (count > 0 && s->state.flush_read) {
+    CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_read(%p)", s->cbs);
+    cronet_bidirectional_stream_read(s->cbs, s->state.rs.read_buffer, 4096);
+    gpr_mu_unlock(&s->mu);
+  } else if (count > 0) {
     s->state.rs.received_bytes += count;
     s->state.rs.remaining_bytes -= count;
     if (s->state.rs.remaining_bytes > 0) {
@@ -478,6 +504,10 @@ static void on_read_completed(cronet_bidirectional_stream *stream, char *data,
       execute_from_storage(s);
     }
   } else {
+    if (s->state.flush_read) {
+      gpr_free(s->state.rs.read_buffer);
+      s->state.rs.read_buffer = NULL;
+    }
     s->state.rs.read_stream_closed = true;
     gpr_mu_unlock(&s->mu);
     execute_from_storage(s);
@@ -507,21 +537,38 @@ static void on_response_trailers_received(
             grpc_mdstr_from_string(trailers->headers[i].key),
             grpc_mdstr_from_string(trailers->headers[i].value)));
     s->state.rs.trailing_metadata_valid = true;
+    if (0 == strcmp(trailers->headers[i].key, "grpc-status") &&
+        0 != strcmp(trailers->headers[i].value, "0")) {
+      s->state.fail_state = true;
+    }
   }
   s->state.state_callback_received[OP_RECV_TRAILING_METADATA] = true;
-  gpr_mu_unlock(&s->mu);
-  execute_from_storage(s);
+  /* Send a EOS when server terminates the stream (testServerFinishesRequest) to
+   * trigger on_succeeded */
+  if (!s->state.state_op_done[OP_SEND_TRAILING_METADATA] &&
+      !(s->state.state_op_done[OP_CANCEL_ERROR] ||
+        s->state.state_callback_received[OP_FAILED])) {
+    CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_write (%p, 0)", s->cbs);
+    s->state.state_callback_received[OP_SEND_MESSAGE] = false;
+    cronet_bidirectional_stream_write(s->cbs, "", 0, true);
+    s->state.state_op_done[OP_SEND_TRAILING_METADATA] = true;
+
+    gpr_mu_unlock(&s->mu);
+  } else {
+    gpr_mu_unlock(&s->mu);
+    execute_from_storage(s);
+  }
 }
 
 /*
  Utility function that takes the data from s->write_slice_buffer and assembles
  into a contiguous byte stream with 5 byte gRPC header prepended.
 */
-static void create_grpc_frame(gpr_slice_buffer *write_slice_buffer,
+static void create_grpc_frame(grpc_slice_buffer *write_slice_buffer,
                               char **pp_write_buffer,
                               size_t *p_write_buffer_size) {
-  gpr_slice slice = gpr_slice_buffer_take_first(write_slice_buffer);
-  size_t length = GPR_SLICE_LENGTH(slice);
+  grpc_slice slice = grpc_slice_buffer_take_first(write_slice_buffer);
+  size_t length = GRPC_SLICE_LENGTH(slice);
   *p_write_buffer_size = length + GRPC_HEADER_SIZE_IN_BYTES;
   /* This is freed in the on_write_completed callback */
   char *write_buffer = gpr_malloc(length + GRPC_HEADER_SIZE_IN_BYTES);
@@ -534,7 +581,7 @@ static void create_grpc_frame(gpr_slice_buffer *write_slice_buffer,
   *p++ = (uint8_t)(length >> 8);
   *p++ = (uint8_t)(length);
   /* append actual data */
-  memcpy(p, GPR_SLICE_START_PTR(slice), length);
+  memcpy(p, GRPC_SLICE_START_PTR(slice), length);
 }
 
 /*
@@ -610,6 +657,16 @@ static int parse_grpc_header(const uint8_t *data) {
   return length;
 }
 
+static bool header_has_authority(grpc_linked_mdelem *head) {
+  while (head != NULL) {
+    if (head->md->key == GRPC_MDSTR_AUTHORITY) {
+      return true;
+    }
+    head = head->next;
+  }
+  return false;
+}
+
 /*
   Op Execution: Decide if one of the actions contained in the stream op can be
   executed. This is the heart of the state machine.
@@ -621,9 +678,9 @@ static bool op_can_be_run(grpc_transport_stream_op *curr_op,
   /* When call is canceled, every op can be run, except under following
   conditions
   */
-  bool is_canceled_of_failed = stream_state->state_op_done[OP_CANCEL_ERROR] ||
+  bool is_canceled_or_failed = stream_state->state_op_done[OP_CANCEL_ERROR] ||
                                stream_state->state_callback_received[OP_FAILED];
-  if (is_canceled_of_failed) {
+  if (is_canceled_or_failed) {
     if (op_id == OP_SEND_INITIAL_METADATA) result = false;
     if (op_id == OP_SEND_MESSAGE) result = false;
     if (op_id == OP_SEND_TRAILING_METADATA) result = false;
@@ -767,16 +824,10 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
       op_can_be_run(stream_op, stream_state, &oas->state,
                     OP_SEND_INITIAL_METADATA)) {
     CRONET_LOG(GPR_DEBUG, "running: %p OP_SEND_INITIAL_METADATA", oas);
-    /* This OP is the beginning. Reset various states */
-    memset(&s->header_array, 0, sizeof(s->header_array));
-    memset(&stream_state->rs, 0, sizeof(stream_state->rs));
-    memset(&stream_state->ws, 0, sizeof(stream_state->ws));
-    memset(stream_state->state_op_done, 0, sizeof(stream_state->state_op_done));
-    memset(stream_state->state_callback_received, 0,
-           sizeof(stream_state->state_callback_received));
     /* Start new cronet stream. It is destroyed in on_succeeded, on_canceled,
      * on_failed */
     GPR_ASSERT(s->cbs == NULL);
+    GPR_ASSERT(!stream_state->state_op_done[OP_SEND_INITIAL_METADATA]);
     s->cbs = cronet_bidirectional_stream_create(s->curr_ct.engine, s->curr_gs,
                                                 &cronet_callbacks);
     CRONET_LOG(GPR_DEBUG, "%p = cronet_bidirectional_stream_create()", s->cbs);
@@ -797,10 +848,13 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_RECV_INITIAL_METADATA)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_INITIAL_METADATA", oas);
-    if (stream_state->state_op_done[OP_CANCEL_ERROR] ||
-        stream_state->state_callback_received[OP_FAILED]) {
+    if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
       grpc_exec_ctx_sched(exec_ctx, stream_op->recv_initial_metadata_ready,
                           GRPC_ERROR_CANCELLED, NULL);
+    } else if (stream_state->state_callback_received[OP_FAILED]) {
+      grpc_exec_ctx_sched(
+          exec_ctx, stream_op->recv_initial_metadata_ready,
+          make_error_with_desc(GRPC_STATUS_UNAVAILABLE, "Unavailable."), NULL);
     } else {
       grpc_chttp2_incoming_metadata_buffer_publish(
           &oas->s->state.rs.initial_metadata, stream_op->recv_initial_metadata);
@@ -817,9 +871,9 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
       result = NO_ACTION_POSSIBLE;
       CRONET_LOG(GPR_DEBUG, "Stream is either cancelled or failed.");
     } else {
-      gpr_slice_buffer write_slice_buffer;
-      gpr_slice slice;
-      gpr_slice_buffer_init(&write_slice_buffer);
+      grpc_slice_buffer write_slice_buffer;
+      grpc_slice slice;
+      grpc_slice_buffer_init(&write_slice_buffer);
       grpc_byte_stream_next(NULL, stream_op->send_message, &slice,
                             stream_op->send_message->length, NULL);
       /* Check that compression flag is OFF. We don't support compression yet.
@@ -828,7 +882,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
         gpr_log(GPR_ERROR, "Compression is not supported");
         GPR_ASSERT(stream_op->send_message->flags == 0);
       }
-      gpr_slice_buffer_add(&write_slice_buffer, slice);
+      grpc_slice_buffer_add(&write_slice_buffer, slice);
       if (write_slice_buffer.count != 1) {
         /* Empty request not handled yet */
         gpr_log(GPR_ERROR, "Empty request is not supported");
@@ -854,12 +908,19 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_RECV_MESSAGE)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_MESSAGE", oas);
-    if (stream_state->state_op_done[OP_CANCEL_ERROR] ||
-        stream_state->state_callback_received[OP_FAILED]) {
-      CRONET_LOG(GPR_DEBUG, "Stream is either cancelled or failed.");
+    if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
+      CRONET_LOG(GPR_DEBUG, "Stream is cancelled.");
       grpc_exec_ctx_sched(exec_ctx, stream_op->recv_message_ready,
                           GRPC_ERROR_CANCELLED, NULL);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
+      result = ACTION_TAKEN_NO_CALLBACK;
+    } else if (stream_state->state_callback_received[OP_FAILED]) {
+      CRONET_LOG(GPR_DEBUG, "Stream failed.");
+      grpc_exec_ctx_sched(
+          exec_ctx, stream_op->recv_message_ready,
+          make_error_with_desc(GRPC_STATUS_UNAVAILABLE, "Unavailable."), NULL);
+      stream_state->state_op_done[OP_RECV_MESSAGE] = true;
+      result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->rs.read_stream_closed == true) {
       /* No more data will be received */
       CRONET_LOG(GPR_DEBUG, "read stream closed");
@@ -867,6 +928,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
                           GRPC_ERROR_NONE, NULL);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
+      result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->rs.length_field_received == false) {
       if (stream_state->rs.received_bytes == GRPC_HEADER_SIZE_IN_BYTES &&
           stream_state->rs.remaining_bytes == 0) {
@@ -891,7 +953,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
         } else {
           stream_state->rs.remaining_bytes = 0;
           CRONET_LOG(GPR_DEBUG, "read operation complete. Empty response.");
-          gpr_slice_buffer_init(&stream_state->rs.read_slice_buffer);
+          grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
           grpc_slice_buffer_stream_init(&stream_state->rs.sbs,
                                         &stream_state->rs.read_slice_buffer, 0);
           *((grpc_byte_buffer **)stream_op->recv_message) =
@@ -918,15 +980,15 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
       }
     } else if (stream_state->rs.remaining_bytes == 0) {
       CRONET_LOG(GPR_DEBUG, "read operation complete");
-      gpr_slice read_data_slice =
-          gpr_slice_malloc((uint32_t)stream_state->rs.length_field);
-      uint8_t *dst_p = GPR_SLICE_START_PTR(read_data_slice);
+      grpc_slice read_data_slice =
+          grpc_slice_malloc((uint32_t)stream_state->rs.length_field);
+      uint8_t *dst_p = GRPC_SLICE_START_PTR(read_data_slice);
       memcpy(dst_p, stream_state->rs.read_buffer,
              (size_t)stream_state->rs.length_field);
       free_read_buffer(s);
-      gpr_slice_buffer_init(&stream_state->rs.read_slice_buffer);
-      gpr_slice_buffer_add(&stream_state->rs.read_slice_buffer,
-                           read_data_slice);
+      grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
+      grpc_slice_buffer_add(&stream_state->rs.read_slice_buffer,
+                            read_data_slice);
       grpc_slice_buffer_stream_init(&stream_state->rs.sbs,
                                     &stream_state->rs.read_slice_buffer, 0);
       *((grpc_byte_buffer **)stream_op->recv_message) =
@@ -935,10 +997,15 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
                           GRPC_ERROR_NONE, NULL);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
-      /* Clear read state of the stream, so next read op (if it were to come)
-       * will work */
-      stream_state->rs.received_bytes = stream_state->rs.remaining_bytes =
-          stream_state->rs.length_field_received = 0;
+      /* Do an extra read to trigger on_succeeded() callback in case connection
+         is closed */
+      stream_state->rs.read_buffer = stream_state->rs.grpc_header_bytes;
+      stream_state->rs.received_bytes = 0;
+      stream_state->rs.remaining_bytes = GRPC_HEADER_SIZE_IN_BYTES;
+      stream_state->rs.length_field_received = false;
+      CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_read(%p)", s->cbs);
+      cronet_bidirectional_stream_read(s->cbs, stream_state->rs.read_buffer,
+                                       stream_state->rs.remaining_bytes);
       result = ACTION_TAKEN_NO_CALLBACK;
     }
   } else if (stream_op->recv_trailing_metadata &&
@@ -975,17 +1042,32 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
     CRONET_LOG(GPR_DEBUG, "W: cronet_bidirectional_stream_cancel(%p)", s->cbs);
     if (s->cbs) {
       cronet_bidirectional_stream_cancel(s->cbs);
+      result = ACTION_TAKEN_WITH_CALLBACK;
+    } else {
+      result = ACTION_TAKEN_NO_CALLBACK;
     }
     stream_state->state_op_done[OP_CANCEL_ERROR] = true;
-    result = ACTION_TAKEN_WITH_CALLBACK;
+    if (!stream_state->cancel_error) {
+      stream_state->cancel_error = GRPC_ERROR_REF(stream_op->cancel_error);
+    }
   } else if (stream_op->on_complete &&
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_ON_COMPLETE)) {
-    /* All actions in this stream_op are complete. Call the on_complete callback
-     */
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_ON_COMPLETE", oas);
-    grpc_exec_ctx_sched(exec_ctx, stream_op->on_complete, GRPC_ERROR_NONE,
-                        NULL);
+    if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
+      grpc_exec_ctx_sched(exec_ctx, stream_op->on_complete,
+                          GRPC_ERROR_REF(stream_state->cancel_error), NULL);
+    } else if (stream_state->state_callback_received[OP_FAILED]) {
+      grpc_exec_ctx_sched(
+          exec_ctx, stream_op->on_complete,
+          make_error_with_desc(GRPC_STATUS_UNAVAILABLE, "Unavailable."), NULL);
+    } else {
+      /* All actions in this stream_op are complete. Call the on_complete
+       * callback
+       */
+      grpc_exec_ctx_sched(exec_ctx, stream_op->on_complete, GRPC_ERROR_NONE,
+                          NULL);
+    }
     oas->state.state_op_done[OP_ON_COMPLETE] = true;
     oas->done = true;
     /* reset any send message state, only if this ON_COMPLETE is about a send.
@@ -999,6 +1081,15 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
       make a note */
     if (stream_op->recv_message)
       stream_state->state_op_done[OP_RECV_MESSAGE_AND_ON_COMPLETE] = true;
+  } else if (stream_state->fail_state && !stream_state->flush_read) {
+    CRONET_LOG(GPR_DEBUG, "running: %p  flush read", oas);
+    if (stream_state->rs.read_buffer &&
+        stream_state->rs.read_buffer != stream_state->rs.grpc_header_bytes) {
+      gpr_free(stream_state->rs.read_buffer);
+      stream_state->rs.read_buffer = NULL;
+    }
+    stream_state->rs.read_buffer = gpr_malloc(4096);
+    stream_state->flush_read = true;
   } else {
     result = NO_ACTION_POSSIBLE;
   }
@@ -1024,6 +1115,8 @@ static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
   memset(s->state.state_op_done, 0, sizeof(s->state.state_op_done));
   memset(s->state.state_callback_received, 0,
          sizeof(s->state.state_callback_received));
+  s->state.fail_state = s->state.flush_read = false;
+  s->state.cancel_error = NULL;
   gpr_mu_init(&s->mu);
   return 0;
 }
@@ -1042,11 +1135,38 @@ static void perform_stream_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
   s->curr_gs = gs;
   memcpy(&s->curr_ct, gt, sizeof(grpc_cronet_transport));
   add_to_storage(s, op);
-  execute_from_storage(s);
+  if (op->send_initial_metadata &&
+      header_has_authority(op->send_initial_metadata->list.head)) {
+    /* Cronet does not support :authority header field. We cancel the call when
+       this field is present in metadata */
+    cronet_bidirectional_stream_header_array header_array;
+    cronet_bidirectional_stream_header *header;
+    cronet_bidirectional_stream cbs;
+    CRONET_LOG(GPR_DEBUG,
+               ":authority header is provided but not supported;"
+               " cancel operations");
+    /* Notify application that operation is cancelled by forging trailers */
+    header_array.count = 1;
+    header_array.capacity = 1;
+    header_array.headers =
+        gpr_malloc(sizeof(cronet_bidirectional_stream_header));
+    header = (cronet_bidirectional_stream_header *)header_array.headers;
+    header->key = "grpc-status";
+    header->value = "1"; /* Return status GRPC_STATUS_CANCELLED */
+    cbs.annotation = (void *)s;
+    s->state.state_op_done[OP_CANCEL_ERROR] = true;
+    on_response_trailers_received(&cbs, &header_array);
+    gpr_free(header_array.headers);
+  } else {
+    execute_from_storage(s);
+  }
 }
 
 static void destroy_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
-                           grpc_stream *gs, void *and_free_memory) {}
+                           grpc_stream *gs, void *and_free_memory) {
+  stream_obj *s = (stream_obj *)gs;
+  GRPC_ERROR_UNREF(s->state.cancel_error);
+}
 
 static void destroy_transport(grpc_exec_ctx *exec_ctx, grpc_transport *gt) {}
 
@@ -1054,6 +1174,11 @@ static char *get_peer(grpc_exec_ctx *exec_ctx, grpc_transport *gt) {
   return NULL;
 }
 
+static grpc_endpoint *get_endpoint(grpc_exec_ctx *exec_ctx,
+                                   grpc_transport *gt) {
+  return NULL;
+}
+
 static void perform_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
                        grpc_transport_op *op) {}
 
@@ -1066,4 +1191,5 @@ const grpc_transport_vtable grpc_cronet_vtable = {sizeof(stream_obj),
                                                   perform_op,
                                                   destroy_stream,
                                                   destroy_transport,
-                                                  get_peer};
+                                                  get_peer,
+                                                  get_endpoint};
diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index cfc072c0b5..401a2ad4fe 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -298,6 +298,12 @@ uint32_t grpc_channel_args_compression_algorithm_get_states(
   }
 }
 
+grpc_channel_args *grpc_channel_args_set_socket_mutator(
+    grpc_channel_args *a, grpc_socket_mutator *mutator) {
+  grpc_arg tmp = grpc_socket_mutator_to_arg(mutator);
+  return grpc_channel_args_copy_and_add(a, &tmp, 1);
+}
+
 int grpc_channel_args_compare(const grpc_channel_args *a,
                               const grpc_channel_args *b) {
   int c = GPR_ICMP(a->num_args, b->num_args);
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index 1e05303471..88fc0e37a3 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -36,6 +36,7 @@
 
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
+#include "src/core/lib/iomgr/socket_mutator.h"
 
 // Channel args are intentionally immutable, to avoid the need for locking.
 
@@ -100,6 +101,13 @@ uint32_t grpc_channel_args_compression_algorithm_get_states(
 int grpc_channel_args_compare(const grpc_channel_args *a,
                               const grpc_channel_args *b);
 
+/** Returns a channel arg instance with socket mutator added. The socket mutator
+ * will perform its mutate_fd method on all file descriptors used by the
+ * channel.
+ * If \a a is non-MULL, its args are copied. */
+grpc_channel_args *grpc_channel_args_set_socket_mutator(
+    grpc_channel_args *a, grpc_socket_mutator *mutator);
+
 /** Returns the value of argument \a name from \a args, or NULL if not found. */
 const grpc_arg *grpc_channel_args_find(const grpc_channel_args *args,
                                        const char *name);
diff --git a/src/core/lib/channel/channel_stack.c b/src/core/lib/channel/channel_stack.c
index 2c5367901d..1d0b7d4f31 100644
--- a/src/core/lib/channel/channel_stack.c
+++ b/src/core/lib/channel/channel_stack.c
@@ -102,13 +102,11 @@ grpc_call_element *grpc_call_stack_element(grpc_call_stack *call_stack,
   return CALL_ELEMS_FROM_STACK(call_stack) + index;
 }
 
-void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
-                             grpc_iomgr_cb_func destroy, void *destroy_arg,
-                             const grpc_channel_filter **filters,
-                             size_t filter_count,
-                             const grpc_channel_args *channel_args,
-                             grpc_transport *optional_transport,
-                             const char *name, grpc_channel_stack *stack) {
+grpc_error *grpc_channel_stack_init(
+    grpc_exec_ctx *exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, const grpc_channel_filter **filters, size_t filter_count,
+    const grpc_channel_args *channel_args, grpc_transport *optional_transport,
+    const char *name, grpc_channel_stack *stack) {
   size_t call_size =
       ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_call_stack)) +
       ROUND_UP_TO_ALIGNMENT_SIZE(filter_count * sizeof(grpc_call_element));
@@ -126,6 +124,7 @@ void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
       ROUND_UP_TO_ALIGNMENT_SIZE(filter_count * sizeof(grpc_channel_element));
 
   /* init per-filter data */
+  grpc_error *first_error = GRPC_ERROR_NONE;
   for (i = 0; i < filter_count; i++) {
     args.channel_stack = stack;
     args.channel_args = channel_args;
@@ -134,7 +133,15 @@ void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
     args.is_last = i == (filter_count - 1);
     elems[i].filter = filters[i];
     elems[i].channel_data = user_data;
-    elems[i].filter->init_channel_elem(exec_ctx, &elems[i], &args);
+    grpc_error *error =
+        elems[i].filter->init_channel_elem(exec_ctx, &elems[i], &args);
+    if (error != GRPC_ERROR_NONE) {
+      if (first_error == GRPC_ERROR_NONE) {
+        first_error = error;
+      } else {
+        GRPC_ERROR_UNREF(error);
+      }
+    }
     user_data += ROUND_UP_TO_ALIGNMENT_SIZE(filters[i]->sizeof_channel_data);
     call_size += ROUND_UP_TO_ALIGNMENT_SIZE(filters[i]->sizeof_call_data);
   }
@@ -144,6 +151,7 @@ void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
              grpc_channel_stack_size(filters, filter_count));
 
   stack->call_stack_size = call_size;
+  return first_error;
 }
 
 void grpc_channel_stack_destroy(grpc_exec_ctx *exec_ctx,
@@ -162,7 +170,8 @@ grpc_error *grpc_call_stack_init(
     grpc_exec_ctx *exec_ctx, grpc_channel_stack *channel_stack,
     int initial_refs, grpc_iomgr_cb_func destroy, void *destroy_arg,
     grpc_call_context_element *context, const void *transport_server_data,
-    grpc_mdstr *path, gpr_timespec deadline, grpc_call_stack *call_stack) {
+    grpc_mdstr *path, gpr_timespec start_time, gpr_timespec deadline,
+    grpc_call_stack *call_stack) {
   grpc_channel_element *channel_elems = CHANNEL_ELEMS_FROM_STACK(channel_stack);
   grpc_call_element_args args;
   size_t count = channel_stack->count;
@@ -179,7 +188,7 @@ grpc_error *grpc_call_stack_init(
 
   /* init per-filter data */
   grpc_error *first_error = GRPC_ERROR_NONE;
-  args.start_time = gpr_now(GPR_CLOCK_MONOTONIC);
+  args.start_time = start_time;
   for (i = 0; i < count; i++) {
     args.call_stack = call_stack;
     args.server_transport_data = transport_server_data;
@@ -255,6 +264,13 @@ char *grpc_call_next_get_peer(grpc_exec_ctx *exec_ctx,
   return next_elem->filter->get_peer(exec_ctx, next_elem);
 }
 
+void grpc_channel_next_get_info(grpc_exec_ctx *exec_ctx,
+                                grpc_channel_element *elem,
+                                const grpc_channel_info *channel_info) {
+  grpc_channel_element *next_elem = elem + 1;
+  next_elem->filter->get_channel_info(exec_ctx, next_elem, channel_info);
+}
+
 void grpc_channel_next_op(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
                           grpc_transport_op *op) {
   grpc_channel_element *next_elem = elem + 1;
@@ -288,7 +304,7 @@ void grpc_call_element_send_cancel(grpc_exec_ctx *exec_ctx,
 void grpc_call_element_send_cancel_with_message(grpc_exec_ctx *exec_ctx,
                                                 grpc_call_element *elem,
                                                 grpc_status_code status,
-                                                gpr_slice *optional_message) {
+                                                grpc_slice *optional_message) {
   grpc_transport_stream_op *op = gpr_malloc(sizeof(*op));
   memset(op, 0, sizeof(*op));
   op->on_complete = grpc_closure_create(destroy_op, op);
@@ -300,7 +316,7 @@ void grpc_call_element_send_cancel_with_message(grpc_exec_ctx *exec_ctx,
 void grpc_call_element_send_close_with_message(grpc_exec_ctx *exec_ctx,
                                                grpc_call_element *elem,
                                                grpc_status_code status,
-                                               gpr_slice *optional_message) {
+                                               grpc_slice *optional_message) {
   grpc_transport_stream_op *op = gpr_malloc(sizeof(*op));
   memset(op, 0, sizeof(*op));
   op->on_complete = grpc_closure_create(destroy_op, op);
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index 27f3be7b29..d9d3a85233 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -34,6 +34,13 @@
 #ifndef GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_H
 #define GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_H
 
+//////////////////////////////////////////////////////////////////////////////
+// IMPORTANT NOTE:
+//
+// When you update this API, please make the corresponding changes to
+// the C++ API in src/cpp/common/channel_filter.{h,cc}
+//////////////////////////////////////////////////////////////////////////////
+
 /* A channel filter defines how operations on a channel are implemented.
    Channel filters are chained together to create full channels, and if those
    chains are linear, then channel stacks provide a mechanism to minimize
@@ -146,8 +153,9 @@ typedef struct {
      is_first, is_last designate this elements position in the stack, and are
      useful for asserting correct configuration by upper layer code.
      The filter does not need to do any chaining */
-  void (*init_channel_elem)(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
-                            grpc_channel_element_args *args);
+  grpc_error *(*init_channel_elem)(grpc_exec_ctx *exec_ctx,
+                                   grpc_channel_element *elem,
+                                   grpc_channel_element_args *args);
   /* Destroy per channel data.
      The filter does not need to do any chaining */
   void (*destroy_channel_elem)(grpc_exec_ctx *exec_ctx,
@@ -156,6 +164,10 @@ typedef struct {
   /* Implement grpc_call_get_peer() */
   char *(*get_peer)(grpc_exec_ctx *exec_ctx, grpc_call_element *elem);
 
+  /* Implement grpc_channel_get_info() */
+  void (*get_channel_info)(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+                           const grpc_channel_info *channel_info);
+
   /* The name of this filter */
   const char *name;
 } grpc_channel_filter;
@@ -210,12 +222,11 @@ grpc_call_element *grpc_call_stack_element(grpc_call_stack *stack, size_t i);
 size_t grpc_channel_stack_size(const grpc_channel_filter **filters,
                                size_t filter_count);
 /* Initialize a channel stack given some filters */
-void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
-                             grpc_iomgr_cb_func destroy, void *destroy_arg,
-                             const grpc_channel_filter **filters,
-                             size_t filter_count, const grpc_channel_args *args,
-                             grpc_transport *optional_transport,
-                             const char *name, grpc_channel_stack *stack);
+grpc_error *grpc_channel_stack_init(
+    grpc_exec_ctx *exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, const grpc_channel_filter **filters, size_t filter_count,
+    const grpc_channel_args *args, grpc_transport *optional_transport,
+    const char *name, grpc_channel_stack *stack);
 /* Destroy a channel stack */
 void grpc_channel_stack_destroy(grpc_exec_ctx *exec_ctx,
                                 grpc_channel_stack *stack);
@@ -227,7 +238,8 @@ grpc_error *grpc_call_stack_init(
     grpc_exec_ctx *exec_ctx, grpc_channel_stack *channel_stack,
     int initial_refs, grpc_iomgr_cb_func destroy, void *destroy_arg,
     grpc_call_context_element *context, const void *transport_server_data,
-    grpc_mdstr *path, gpr_timespec deadline, grpc_call_stack *call_stack);
+    grpc_mdstr *path, gpr_timespec start_time, gpr_timespec deadline,
+    grpc_call_stack *call_stack);
 /* Set a pollset or a pollset_set for a call stack: must occur before the first
  * op is started */
 void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx *exec_ctx,
@@ -273,6 +285,10 @@ void grpc_channel_next_op(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
                           grpc_transport_op *op);
 /* Pass through a request to get_peer to the next child element */
 char *grpc_call_next_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem);
+/* Pass through a request to get_channel_info() to the next child element */
+void grpc_channel_next_get_info(grpc_exec_ctx *exec_ctx,
+                                grpc_channel_element *elem,
+                                const grpc_channel_info *channel_info);
 
 /* Given the top element of a channel stack, get the channel stack itself */
 grpc_channel_stack *grpc_channel_stack_from_top_element(
@@ -289,12 +305,12 @@ void grpc_call_element_send_cancel(grpc_exec_ctx *exec_ctx,
 void grpc_call_element_send_cancel_with_message(grpc_exec_ctx *exec_ctx,
                                                 grpc_call_element *cur_elem,
                                                 grpc_status_code status,
-                                                gpr_slice *optional_message);
+                                                grpc_slice *optional_message);
 
 void grpc_call_element_send_close_with_message(grpc_exec_ctx *exec_ctx,
                                                grpc_call_element *cur_elem,
                                                grpc_status_code status,
-                                               gpr_slice *optional_message);
+                                               grpc_slice *optional_message);
 
 extern int grpc_trace_channel;
 
diff --git a/src/core/lib/channel/channel_stack_builder.c b/src/core/lib/channel/channel_stack_builder.c
index eda4968f48..b959517afb 100644
--- a/src/core/lib/channel/channel_stack_builder.c
+++ b/src/core/lib/channel/channel_stack_builder.c
@@ -227,11 +227,10 @@ void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder *builder) {
   gpr_free(builder);
 }
 
-void *grpc_channel_stack_builder_finish(grpc_exec_ctx *exec_ctx,
-                                        grpc_channel_stack_builder *builder,
-                                        size_t prefix_bytes, int initial_refs,
-                                        grpc_iomgr_cb_func destroy,
-                                        void *destroy_arg) {
+grpc_error *grpc_channel_stack_builder_finish(
+    grpc_exec_ctx *exec_ctx, grpc_channel_stack_builder *builder,
+    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, void **result) {
   // count the number of filters
   size_t num_filters = 0;
   for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
@@ -250,28 +249,35 @@ void *grpc_channel_stack_builder_finish(grpc_exec_ctx *exec_ctx,
   size_t channel_stack_size = grpc_channel_stack_size(filters, num_filters);
 
   // allocate memory, with prefix_bytes followed by channel_stack_size
-  char *result = gpr_malloc(prefix_bytes + channel_stack_size);
+  *result = gpr_malloc(prefix_bytes + channel_stack_size);
   // fetch a pointer to the channel stack
   grpc_channel_stack *channel_stack =
-      (grpc_channel_stack *)(result + prefix_bytes);
+      (grpc_channel_stack *)((char *)(*result) + prefix_bytes);
   // and initialize it
-  grpc_channel_stack_init(exec_ctx, initial_refs, destroy,
-                          destroy_arg == NULL ? result : destroy_arg, filters,
-                          num_filters, builder->args, builder->transport,
-                          builder->name, channel_stack);
-
-  // run post-initialization functions
-  i = 0;
-  for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
-    if (p->init != NULL) {
-      p->init(channel_stack, grpc_channel_stack_element(channel_stack, i),
-              p->init_arg);
+  grpc_error *error = grpc_channel_stack_init(
+      exec_ctx, initial_refs, destroy,
+      destroy_arg == NULL ? *result : destroy_arg, filters, num_filters,
+      builder->args, builder->transport, builder->name, channel_stack);
+
+  if (error != GRPC_ERROR_NONE) {
+    grpc_channel_stack_destroy(exec_ctx, channel_stack);
+    gpr_free(*result);
+    *result = NULL;
+  } else {
+    // run post-initialization functions
+    i = 0;
+    for (filter_node *p = builder->begin.next; p != &builder->end;
+         p = p->next) {
+      if (p->init != NULL) {
+        p->init(channel_stack, grpc_channel_stack_element(channel_stack, i),
+                p->init_arg);
+      }
+      i++;
     }
-    i++;
   }
 
   grpc_channel_stack_builder_destroy(builder);
   gpr_free((grpc_channel_filter **)filters);
 
-  return result;
+  return error;
 }
diff --git a/src/core/lib/channel/channel_stack_builder.h b/src/core/lib/channel/channel_stack_builder.h
index 4a00f7bfdb..65bfebcabc 100644
--- a/src/core/lib/channel/channel_stack_builder.h
+++ b/src/core/lib/channel/channel_stack_builder.h
@@ -146,16 +146,15 @@ bool grpc_channel_stack_builder_append_filter(
 void grpc_channel_stack_builder_iterator_destroy(
     grpc_channel_stack_builder_iterator *iterator);
 
-/// Destroy the builder, return the freshly minted channel stack
+/// Destroy the builder, return the freshly minted channel stack in \a result.
 /// Allocates \a prefix_bytes bytes before the channel stack
 /// Returns the base pointer of the allocated block
 /// \a initial_refs, \a destroy, \a destroy_arg are as per
 /// grpc_channel_stack_init
-void *grpc_channel_stack_builder_finish(grpc_exec_ctx *exec_ctx,
-                                        grpc_channel_stack_builder *builder,
-                                        size_t prefix_bytes, int initial_refs,
-                                        grpc_iomgr_cb_func destroy,
-                                        void *destroy_arg);
+grpc_error *grpc_channel_stack_builder_finish(
+    grpc_exec_ctx *exec_ctx, grpc_channel_stack_builder *builder,
+    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, void **result);
 
 /// Destroy the builder without creating a channel stack
 void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder *builder);
diff --git a/src/core/lib/channel/compress_filter.c b/src/core/lib/channel/compress_filter.c
index 0981d59f63..0e336dc330 100644
--- a/src/core/lib/channel/compress_filter.c
+++ b/src/core/lib/channel/compress_filter.c
@@ -35,9 +35,9 @@
 #include <string.h>
 
 #include <grpc/compression.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/compress_filter.h"
@@ -50,7 +50,7 @@
 int grpc_compression_trace = 0;
 
 typedef struct call_data {
-  gpr_slice_buffer slices; /**< Buffers up input slices to be compressed */
+  grpc_slice_buffer slices; /**< Buffers up input slices to be compressed */
   grpc_linked_mdelem compression_algorithm_storage;
   grpc_linked_mdelem accept_encoding_storage;
   uint32_t remaining_slice_bytes;
@@ -63,7 +63,7 @@ typedef struct call_data {
   grpc_transport_stream_op *send_op;
   uint32_t send_length;
   uint32_t send_flags;
-  gpr_slice incoming_slice;
+  grpc_slice incoming_slice;
   grpc_slice_buffer_stream replacement_stream;
   grpc_closure *post_send;
   grpc_closure send_done;
@@ -111,9 +111,13 @@ static grpc_mdelem *compression_md_filter(void *user_data, grpc_mdelem *md) {
   return md;
 }
 
-static int skip_compression(grpc_call_element *elem) {
+static int skip_compression(grpc_call_element *elem, uint32_t flags) {
   call_data *calld = elem->call_data;
   channel_data *channeld = elem->channel_data;
+
+  if (flags & (GRPC_WRITE_NO_COMPRESS | GRPC_WRITE_INTERNAL_COMPRESS)) {
+    return 1;
+  }
   if (calld->has_compression_algorithm) {
     if (calld->compression_algorithm == GRPC_COMPRESS_NONE) {
       return 1;
@@ -157,7 +161,7 @@ static void continue_send_message(grpc_exec_ctx *exec_ctx,
 static void send_done(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
-  gpr_slice_buffer_reset_and_unref(&calld->slices);
+  grpc_slice_buffer_reset_and_unref(&calld->slices);
   calld->post_send->cb(exec_ctx, calld->post_send->cb_arg, error);
 }
 
@@ -165,8 +169,8 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
                                 grpc_call_element *elem) {
   call_data *calld = elem->call_data;
   int did_compress;
-  gpr_slice_buffer tmp;
-  gpr_slice_buffer_init(&tmp);
+  grpc_slice_buffer tmp;
+  grpc_slice_buffer_init(&tmp);
   did_compress =
       grpc_msg_compress(calld->compression_algorithm, &calld->slices, &tmp);
   if (did_compress) {
@@ -181,7 +185,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
                          " bytes (%.2f%% savings)",
               algo_name, before_size, after_size, 100 * savings_ratio);
     }
-    gpr_slice_buffer_swap(&calld->slices, &tmp);
+    grpc_slice_buffer_swap(&calld->slices, &tmp);
     calld->send_flags |= GRPC_WRITE_INTERNAL_COMPRESS;
   } else {
     if (grpc_compression_trace) {
@@ -195,7 +199,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
     }
   }
 
-  gpr_slice_buffer_destroy(&tmp);
+  grpc_slice_buffer_destroy(&tmp);
 
   grpc_slice_buffer_stream_init(&calld->replacement_stream, &calld->slices,
                                 calld->send_flags);
@@ -209,7 +213,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
 static void got_slice(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
-  gpr_slice_buffer_add(&calld->slices, calld->incoming_slice);
+  grpc_slice_buffer_add(&calld->slices, calld->incoming_slice);
   if (calld->send_length == calld->slices.length) {
     finish_send_message(exec_ctx, elem);
   } else {
@@ -223,7 +227,7 @@ static void continue_send_message(grpc_exec_ctx *exec_ctx,
   while (grpc_byte_stream_next(exec_ctx, calld->send_op->send_message,
                                &calld->incoming_slice, ~(size_t)0,
                                &calld->got_slice)) {
-    gpr_slice_buffer_add(&calld->slices, calld->incoming_slice);
+    grpc_slice_buffer_add(&calld->slices, calld->incoming_slice);
     if (calld->send_length == calld->slices.length) {
       finish_send_message(exec_ctx, elem);
       break;
@@ -241,8 +245,8 @@ static void compress_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
   if (op->send_initial_metadata) {
     process_send_initial_metadata(elem, op->send_initial_metadata);
   }
-  if (op->send_message != NULL && !skip_compression(elem) &&
-      0 == (op->send_message->flags & GRPC_WRITE_NO_COMPRESS)) {
+  if (op->send_message != NULL &&
+      !skip_compression(elem, op->send_message->flags)) {
     calld->send_op = op;
     calld->send_length = op->send_message->length;
     calld->send_flags = op->send_message->flags;
@@ -263,7 +267,7 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
   call_data *calld = elem->call_data;
 
   /* initialize members */
-  gpr_slice_buffer_init(&calld->slices);
+  grpc_slice_buffer_init(&calld->slices);
   calld->has_compression_algorithm = 0;
   grpc_closure_init(&calld->got_slice, got_slice, elem);
   grpc_closure_init(&calld->send_done, send_done, elem);
@@ -277,13 +281,13 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                               void *ignored) {
   /* grab pointers to our data from the call element */
   call_data *calld = elem->call_data;
-  gpr_slice_buffer_destroy(&calld->slices);
+  grpc_slice_buffer_destroy(&calld->slices);
 }
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   channel_data *channeld = elem->channel_data;
 
   channeld->enabled_algorithms_bitset =
@@ -311,6 +315,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
   }
 
   GPR_ASSERT(!args->is_last);
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -328,4 +333,5 @@ const grpc_channel_filter grpc_compress_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "compress"};
diff --git a/src/core/lib/channel/connected_channel.c b/src/core/lib/channel/connected_channel.c
index 918379c845..c2a36b5558 100644
--- a/src/core/lib/channel/connected_channel.c
+++ b/src/core/lib/channel/connected_channel.c
@@ -38,9 +38,9 @@
 #include <string.h>
 
 #include <grpc/byte_buffer.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/transport.h"
@@ -114,12 +114,13 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
 }
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   channel_data *cd = (channel_data *)elem->channel_data;
   GPR_ASSERT(args->is_last);
   cd->transport = NULL;
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel_data */
@@ -134,6 +135,11 @@ static char *con_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
   return grpc_transport_get_peer(exec_ctx, chand->transport);
 }
 
+/* No-op. */
+static void con_get_channel_info(grpc_exec_ctx *exec_ctx,
+                                 grpc_channel_element *elem,
+                                 const grpc_channel_info *channel_info) {}
+
 static const grpc_channel_filter connected_channel_filter = {
     con_start_transport_stream_op,
     con_start_transport_op,
@@ -145,6 +151,7 @@ static const grpc_channel_filter connected_channel_filter = {
     init_channel_elem,
     destroy_channel_elem,
     con_get_peer,
+    con_get_channel_info,
     "connected",
 };
 
diff --git a/src/core/lib/channel/context.h b/src/core/lib/channel/context.h
index 071c5f695c..6c931ad28a 100644
--- a/src/core/lib/channel/context.h
+++ b/src/core/lib/channel/context.h
@@ -47,6 +47,9 @@ typedef enum {
   /// Value is a \a census_context.
   GRPC_CONTEXT_TRACING,
 
+  /// Reserved for traffic_class_context.
+  GRPC_CONTEXT_TRAFFIC,
+
   GRPC_CONTEXT_COUNT
 } grpc_context_index;
 
diff --git a/src/core/lib/channel/deadline_filter.c b/src/core/lib/channel/deadline_filter.c
index d2ea5250f6..470ccfea57 100644
--- a/src/core/lib/channel/deadline_filter.c
+++ b/src/core/lib/channel/deadline_filter.c
@@ -55,10 +55,10 @@ static void timer_callback(grpc_exec_ctx* exec_ctx, void* arg,
   deadline_state->timer_pending = false;
   gpr_mu_unlock(&deadline_state->timer_mu);
   if (error != GRPC_ERROR_CANCELLED) {
-    gpr_slice msg = gpr_slice_from_static_string("Deadline Exceeded");
+    grpc_slice msg = grpc_slice_from_static_string("Deadline Exceeded");
     grpc_call_element_send_cancel_with_message(
         exec_ctx, elem, GRPC_STATUS_DEADLINE_EXCEEDED, &msg);
-    gpr_slice_unref(msg);
+    grpc_slice_unref(msg);
   }
   GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack, "deadline_timer");
 }
@@ -207,10 +207,11 @@ void grpc_deadline_state_client_start_transport_stream_op(
 //
 
 // Constructor for channel_data.  Used for both client and server filters.
-static void init_channel_elem(grpc_exec_ctx* exec_ctx,
-                              grpc_channel_element* elem,
-                              grpc_channel_element_args* args) {
+static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
+                                     grpc_channel_element* elem,
+                                     grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
+  return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.  Used for both client and server filters.
@@ -316,6 +317,7 @@ const grpc_channel_filter grpc_client_deadline_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "deadline",
 };
 
@@ -330,5 +332,6 @@ const grpc_channel_filter grpc_server_deadline_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "deadline",
 };
diff --git a/src/core/lib/channel/handshaker.c b/src/core/lib/channel/handshaker.c
index 0d759887bc..23edc826ca 100644
--- a/src/core/lib/channel/handshaker.c
+++ b/src/core/lib/channel/handshaker.c
@@ -38,12 +38,13 @@
 
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/iomgr/timer.h"
 
 //
 // grpc_handshaker
 //
 
-void grpc_handshaker_init(const struct grpc_handshaker_vtable* vtable,
+void grpc_handshaker_init(const grpc_handshaker_vtable* vtable,
                           grpc_handshaker* handshaker) {
   handshaker->vtable = vtable;
 }
@@ -60,45 +61,43 @@ void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
 
 void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
                                   grpc_handshaker* handshaker,
-                                  grpc_endpoint* endpoint,
-                                  grpc_channel_args* args,
-                                  gpr_slice_buffer* read_buffer,
-                                  gpr_timespec deadline,
                                   grpc_tcp_server_acceptor* acceptor,
-                                  grpc_handshaker_done_cb cb, void* user_data) {
-  handshaker->vtable->do_handshake(exec_ctx, handshaker, endpoint, args,
-                                   read_buffer, deadline, acceptor, cb,
-                                   user_data);
+                                  grpc_closure* on_handshake_done,
+                                  grpc_handshaker_args* args) {
+  handshaker->vtable->do_handshake(exec_ctx, handshaker, acceptor,
+                                   on_handshake_done, args);
 }
 
 //
 // grpc_handshake_manager
 //
 
-// State used while chaining handshakers.
-struct grpc_handshaker_state {
-  // The index of the handshaker to invoke next.
-  size_t index;
-  // The deadline for all handshakers.
-  gpr_timespec deadline;
-  // The acceptor to call the handshakers with.
-  grpc_tcp_server_acceptor* acceptor;
-  // The final callback and user_data to invoke after the last handshaker.
-  grpc_handshaker_done_cb final_cb;
-  void* final_user_data;
-};
-
 struct grpc_handshake_manager {
+  gpr_mu mu;
+  gpr_refcount refs;
+  bool shutdown;
   // An array of handshakers added via grpc_handshake_manager_add().
   size_t count;
   grpc_handshaker** handshakers;
-  // State used while chaining handshakers.
-  struct grpc_handshaker_state* state;
+  // The index of the handshaker to invoke next and closure to invoke it.
+  size_t index;
+  grpc_closure call_next_handshaker;
+  // The acceptor to call the handshakers with.
+  grpc_tcp_server_acceptor* acceptor;
+  // Deadline timer across all handshakers.
+  grpc_timer deadline_timer;
+  // The final callback and user_data to invoke after the last handshaker.
+  grpc_closure on_handshake_done;
+  void* user_data;
+  // Handshaker args.
+  grpc_handshaker_args args;
 };
 
 grpc_handshake_manager* grpc_handshake_manager_create() {
   grpc_handshake_manager* mgr = gpr_malloc(sizeof(grpc_handshake_manager));
   memset(mgr, 0, sizeof(*mgr));
+  gpr_mu_init(&mgr->mu);
+  gpr_ref_init(&mgr->refs, 1);
   return mgr;
 }
 
@@ -106,6 +105,7 @@ static bool is_power_of_2(size_t n) { return (n & (n - 1)) == 0; }
 
 void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
                                 grpc_handshaker* handshaker) {
+  gpr_mu_lock(&mgr->mu);
   // To avoid allocating memory for each handshaker we add, we double
   // the number of elements every time we need more.
   size_t realloc_count = 0;
@@ -119,85 +119,117 @@ void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
         gpr_realloc(mgr->handshakers, realloc_count * sizeof(grpc_handshaker*));
   }
   mgr->handshakers[mgr->count++] = handshaker;
+  gpr_mu_unlock(&mgr->mu);
+}
+
+static void grpc_handshake_manager_unref(grpc_exec_ctx* exec_ctx,
+                                         grpc_handshake_manager* mgr) {
+  if (gpr_unref(&mgr->refs)) {
+    for (size_t i = 0; i < mgr->count; ++i) {
+      grpc_handshaker_destroy(exec_ctx, mgr->handshakers[i]);
+    }
+    gpr_free(mgr->handshakers);
+    gpr_mu_destroy(&mgr->mu);
+    gpr_free(mgr);
+  }
 }
 
 void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
                                     grpc_handshake_manager* mgr) {
-  for (size_t i = 0; i < mgr->count; ++i) {
-    grpc_handshaker_destroy(exec_ctx, mgr->handshakers[i]);
-  }
-  gpr_free(mgr->handshakers);
-  gpr_free(mgr);
+  grpc_handshake_manager_unref(exec_ctx, mgr);
 }
 
 void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
                                      grpc_handshake_manager* mgr) {
-  for (size_t i = 0; i < mgr->count; ++i) {
-    grpc_handshaker_shutdown(exec_ctx, mgr->handshakers[i]);
+  gpr_mu_lock(&mgr->mu);
+  // Shutdown the handshaker that's currently in progress, if any.
+  if (!mgr->shutdown && mgr->index > 0) {
+    mgr->shutdown = true;
+    grpc_handshaker_shutdown(exec_ctx, mgr->handshakers[mgr->index - 1]);
   }
-  if (mgr->state != NULL) {
-    gpr_free(mgr->state);
-    mgr->state = NULL;
+  gpr_mu_unlock(&mgr->mu);
+}
+
+// Helper function to call either the next handshaker or the
+// on_handshake_done callback.
+// Returns true if we've scheduled the on_handshake_done callback.
+static bool call_next_handshaker_locked(grpc_exec_ctx* exec_ctx,
+                                        grpc_handshake_manager* mgr,
+                                        grpc_error* error) {
+  GPR_ASSERT(mgr->index <= mgr->count);
+  // If we got an error or we've been shut down or we're exiting early or
+  // we've finished the last handshaker, invoke the on_handshake_done
+  // callback.  Otherwise, call the next handshaker.
+  if (error != GRPC_ERROR_NONE || mgr->shutdown || mgr->args.exit_early ||
+      mgr->index == mgr->count) {
+    // Cancel deadline timer, since we're invoking the on_handshake_done
+    // callback now.
+    grpc_timer_cancel(exec_ctx, &mgr->deadline_timer);
+    grpc_exec_ctx_sched(exec_ctx, &mgr->on_handshake_done, error, NULL);
+    mgr->shutdown = true;
+  } else {
+    grpc_handshaker_do_handshake(exec_ctx, mgr->handshakers[mgr->index],
+                                 mgr->acceptor, &mgr->call_next_handshaker,
+                                 &mgr->args);
   }
+  ++mgr->index;
+  return mgr->shutdown;
 }
 
 // A function used as the handshaker-done callback when chaining
 // handshakers together.
-static void call_next_handshaker(grpc_exec_ctx* exec_ctx,
-                                 grpc_endpoint* endpoint,
-                                 grpc_channel_args* args,
-                                 gpr_slice_buffer* read_buffer, void* user_data,
+static void call_next_handshaker(grpc_exec_ctx* exec_ctx, void* arg,
                                  grpc_error* error) {
-  grpc_handshake_manager* mgr = user_data;
-  GPR_ASSERT(mgr->state != NULL);
-  GPR_ASSERT(mgr->state->index < mgr->count);
-  // If we got an error, skip all remaining handshakers and invoke the
-  // caller-supplied callback immediately.
-  if (error != GRPC_ERROR_NONE) {
-    mgr->state->final_cb(exec_ctx, endpoint, args, read_buffer,
-                         mgr->state->final_user_data, error);
-    return;
+  grpc_handshake_manager* mgr = arg;
+  gpr_mu_lock(&mgr->mu);
+  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_REF(error));
+  gpr_mu_unlock(&mgr->mu);
+  // If we're invoked the final callback, we won't be coming back
+  // to this function, so we can release our reference to the
+  // handshake manager.
+  if (done) {
+    grpc_handshake_manager_unref(exec_ctx, mgr);
   }
-  grpc_handshaker_done_cb cb = call_next_handshaker;
-  // If this is the last handshaker, use the caller-supplied callback
-  // and user_data instead of chaining back to this function again.
-  if (mgr->state->index == mgr->count - 1) {
-    cb = mgr->state->final_cb;
-    user_data = mgr->state->final_user_data;
-  }
-  // Invoke handshaker.
-  grpc_handshaker_do_handshake(
-      exec_ctx, mgr->handshakers[mgr->state->index], endpoint, args,
-      read_buffer, mgr->state->deadline, mgr->state->acceptor, cb, user_data);
-  ++mgr->state->index;
-  // If this is the last handshaker, clean up state.
-  if (mgr->state->index == mgr->count) {
-    gpr_free(mgr->state);
-    mgr->state = NULL;
+}
+
+// Callback invoked when deadline is exceeded.
+static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+  grpc_handshake_manager* mgr = arg;
+  if (error == GRPC_ERROR_NONE) {  // Timer fired, rather than being cancelled.
+    grpc_handshake_manager_shutdown(exec_ctx, mgr);
   }
+  grpc_handshake_manager_unref(exec_ctx, mgr);
 }
 
 void grpc_handshake_manager_do_handshake(
     grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
-    grpc_endpoint* endpoint, const grpc_channel_args* args,
+    grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
     gpr_timespec deadline, grpc_tcp_server_acceptor* acceptor,
-    grpc_handshaker_done_cb cb, void* user_data) {
-  grpc_channel_args* args_copy = grpc_channel_args_copy(args);
-  gpr_slice_buffer* read_buffer = gpr_malloc(sizeof(*read_buffer));
-  gpr_slice_buffer_init(read_buffer);
-  if (mgr->count == 0) {
-    // No handshakers registered, so we just immediately call the done
-    // callback with the passed-in endpoint.
-    cb(exec_ctx, endpoint, args_copy, read_buffer, user_data, GRPC_ERROR_NONE);
-  } else {
-    GPR_ASSERT(mgr->state == NULL);
-    mgr->state = gpr_malloc(sizeof(struct grpc_handshaker_state));
-    memset(mgr->state, 0, sizeof(*mgr->state));
-    mgr->state->deadline = deadline;
-    mgr->state->acceptor = acceptor;
-    mgr->state->final_cb = cb;
-    mgr->state->final_user_data = user_data;
-    call_next_handshaker(exec_ctx, endpoint, args_copy, read_buffer, mgr,
-                         GRPC_ERROR_NONE);
+    grpc_iomgr_cb_func on_handshake_done, void* user_data) {
+  gpr_mu_lock(&mgr->mu);
+  GPR_ASSERT(mgr->index == 0);
+  GPR_ASSERT(!mgr->shutdown);
+  // Construct handshaker args.  These will be passed through all
+  // handshakers and eventually be freed by the on_handshake_done callback.
+  mgr->args.endpoint = endpoint;
+  mgr->args.args = grpc_channel_args_copy(channel_args);
+  mgr->args.user_data = user_data;
+  mgr->args.read_buffer = gpr_malloc(sizeof(*mgr->args.read_buffer));
+  grpc_slice_buffer_init(mgr->args.read_buffer);
+  // Initialize state needed for calling handshakers.
+  mgr->acceptor = acceptor;
+  grpc_closure_init(&mgr->call_next_handshaker, call_next_handshaker, mgr);
+  grpc_closure_init(&mgr->on_handshake_done, on_handshake_done, &mgr->args);
+  // Start deadline timer, which owns a ref.
+  gpr_ref(&mgr->refs);
+  grpc_timer_init(exec_ctx, &mgr->deadline_timer,
+                  gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
+                  on_timeout, mgr, gpr_now(GPR_CLOCK_MONOTONIC));
+  // Start first handshaker, which also owns a ref.
+  gpr_ref(&mgr->refs);
+  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_NONE);
+  gpr_mu_unlock(&mgr->mu);
+  if (done) {
+    grpc_handshake_manager_unref(exec_ctx, mgr);
   }
 }
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index d574b46242..450b7adaee 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -54,15 +54,33 @@
 
 typedef struct grpc_handshaker grpc_handshaker;
 
-/// Callback type invoked when a handshaker is done.
-/// Takes ownership of \a args and \a read_buffer.
-typedef void (*grpc_handshaker_done_cb)(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* endpoint,
-                                        grpc_channel_args* args,
-                                        gpr_slice_buffer* read_buffer,
-                                        void* user_data, grpc_error* error);
-
-struct grpc_handshaker_vtable {
+/// Arguments passed through handshakers and to the on_handshake_done callback.
+///
+/// For handshakers, all members are input/output parameters; for
+/// example, a handshaker may read from or write to \a endpoint and
+/// then later replace it with a wrapped endpoint.  Similarly, a
+/// handshaker may modify \a args.
+///
+/// A handshaker takes ownership of the members while a handshake is in
+/// progress.  Upon failure or shutdown of an in-progress handshaker,
+/// the handshaker is responsible for destroying the members and setting
+/// them to NULL before invoking the on_handshake_done callback.
+///
+/// For the on_handshake_done callback, all members are input arguments,
+/// which the callback takes ownership of.
+typedef struct {
+  grpc_endpoint* endpoint;
+  grpc_channel_args* args;
+  grpc_slice_buffer* read_buffer;
+  // A handshaker may set this to true before invoking on_handshake_done
+  // to indicate that subsequent handshakers should be skipped.
+  bool exit_early;
+  // User data passed through the handshake manager.  Not used by
+  // individual handshakers.
+  void* user_data;
+} grpc_handshaker_args;
+
+typedef struct {
   /// Destroys the handshaker.
   void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
 
@@ -70,43 +88,35 @@ struct grpc_handshaker_vtable {
   /// aborted in the middle).
   void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
 
-  /// Performs handshaking.  When finished, calls \a cb with \a user_data.
-  /// Takes ownership of \a args.
-  /// Takes ownership of \a read_buffer, which contains leftover bytes read
-  /// from the endpoint by the previous handshaker.
+  /// Performs handshaking, modifying \a args as needed (e.g., to
+  /// replace \a endpoint with a wrapped endpoint).
+  /// When finished, invokes \a on_handshake_done.
   /// \a acceptor will be NULL for client-side handshakers.
   void (*do_handshake)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
-                       grpc_endpoint* endpoint, grpc_channel_args* args,
-                       gpr_slice_buffer* read_buffer, gpr_timespec deadline,
                        grpc_tcp_server_acceptor* acceptor,
-                       grpc_handshaker_done_cb cb, void* user_data);
-};
+                       grpc_closure* on_handshake_done,
+                       grpc_handshaker_args* args);
+} grpc_handshaker_vtable;
 
 /// Base struct.  To subclass, make this the first member of the
 /// implementation struct.
 struct grpc_handshaker {
-  const struct grpc_handshaker_vtable* vtable;
+  const grpc_handshaker_vtable* vtable;
 };
 
 /// Called by concrete implementations to initialize the base struct.
-void grpc_handshaker_init(const struct grpc_handshaker_vtable* vtable,
+void grpc_handshaker_init(const grpc_handshaker_vtable* vtable,
                           grpc_handshaker* handshaker);
 
-/// Convenient wrappers for invoking methods via the vtable.
-/// These probably do not need to be called from anywhere but
-/// grpc_handshake_manager.
 void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
                              grpc_handshaker* handshaker);
 void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
                               grpc_handshaker* handshaker);
 void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
                                   grpc_handshaker* handshaker,
-                                  grpc_endpoint* endpoint,
-                                  grpc_channel_args* args,
-                                  gpr_slice_buffer* read_buffer,
-                                  gpr_timespec deadline,
                                   grpc_tcp_server_acceptor* acceptor,
-                                  grpc_handshaker_done_cb cb, void* user_data);
+                                  grpc_closure* on_handshake_done,
+                                  grpc_handshaker_args* args);
 
 ///
 /// grpc_handshake_manager
@@ -134,15 +144,21 @@ void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
                                      grpc_handshake_manager* mgr);
 
 /// Invokes handshakers in the order they were added.
-/// Does NOT take ownership of \a args.  Instead, makes a copy before
+/// Takes ownership of \a endpoint, and then passes that ownership to
+/// the \a on_handshake_done callback.
+/// Does NOT take ownership of \a channel_args.  Instead, makes a copy before
 /// invoking the first handshaker.
 /// \a acceptor will be NULL for client-side handshakers.
-/// Invokes \a cb with \a user_data after either a handshaker fails or
-/// all handshakers have completed successfully.
+///
+/// When done, invokes \a on_handshake_done with a grpc_handshaker_args
+/// object as its argument.  If the callback is invoked with error !=
+/// GRPC_ERROR_NONE, then handshaking failed and the handshaker has done
+/// the necessary clean-up.  Otherwise, the callback takes ownership of
+/// the arguments.
 void grpc_handshake_manager_do_handshake(
     grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
-    grpc_endpoint* endpoint, const grpc_channel_args* args,
+    grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
     gpr_timespec deadline, grpc_tcp_server_acceptor* acceptor,
-    grpc_handshaker_done_cb cb, void* user_data);
+    grpc_iomgr_cb_func on_handshake_done, void* user_data);
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H */
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index 1dc05fb20d..1a2d08dda5 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -36,6 +36,7 @@
 #include <grpc/support/string_util.h>
 #include <string.h>
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/slice/percent_encoding.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/static_metadata.h"
 #include "src/core/lib/transport/transport_impl.h"
@@ -56,27 +57,30 @@ typedef struct call_data {
   grpc_linked_mdelem payload_bin;
 
   grpc_metadata_batch *recv_initial_metadata;
+  grpc_metadata_batch *recv_trailing_metadata;
   uint8_t *payload_bytes;
 
   /* Vars to read data off of send_message */
   grpc_transport_stream_op send_op;
   uint32_t send_length;
   uint32_t send_flags;
-  gpr_slice incoming_slice;
+  grpc_slice incoming_slice;
   grpc_slice_buffer_stream replacement_stream;
-  gpr_slice_buffer slices;
+  grpc_slice_buffer slices;
   /* flag that indicates that all slices of send_messages aren't availble */
   bool send_message_blocked;
 
   /** Closure to call when finished with the hc_on_recv hook */
-  grpc_closure *on_done_recv;
+  grpc_closure *on_done_recv_initial_metadata;
+  grpc_closure *on_done_recv_trailing_metadata;
   grpc_closure *on_complete;
   grpc_closure *post_send;
 
   /** Receive closures are chained: we inject this closure as the on_done_recv
       up-call on transport_op, and remember to call our on_done_recv member
       after handling it. */
-  grpc_closure hc_on_recv;
+  grpc_closure hc_on_recv_initial_metadata;
+  grpc_closure hc_on_recv_trailing_metadata;
   grpc_closure hc_on_complete;
   grpc_closure got_slice;
   grpc_closure send_done;
@@ -101,11 +105,21 @@ static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) {
     char *message_string;
     gpr_asprintf(&message_string, "Received http2 header with status: %s",
                  grpc_mdstr_as_c_string(md->value));
-    gpr_slice message = gpr_slice_from_copied_string(message_string);
+    grpc_slice message = grpc_slice_from_copied_string(message_string);
     gpr_free(message_string);
     grpc_call_element_send_close_with_message(a->exec_ctx, a->elem,
                                               GRPC_STATUS_CANCELLED, &message);
     return NULL;
+  } else if (md->key == GRPC_MDSTR_GRPC_MESSAGE) {
+    grpc_slice pct_decoded_msg =
+        grpc_permissive_percent_decode_slice(md->value->slice);
+    if (grpc_slice_is_equivalent(pct_decoded_msg, md->value->slice)) {
+      grpc_slice_unref(pct_decoded_msg);
+      return md;
+    } else {
+      return grpc_mdelem_from_metadata_strings(
+          GRPC_MDSTR_GRPC_MESSAGE, grpc_mdstr_from_slice(pct_decoded_msg));
+    }
   } else if (md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) {
     return NULL;
   } else if (md->key == GRPC_MDSTR_CONTENT_TYPE) {
@@ -129,8 +143,8 @@ static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) {
   return md;
 }
 
-static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data,
-                       grpc_error *error) {
+static void hc_on_recv_initial_metadata(grpc_exec_ctx *exec_ctx,
+                                        void *user_data, grpc_error *error) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
   client_recv_filter_args a;
@@ -138,7 +152,21 @@ static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data,
   a.exec_ctx = exec_ctx;
   grpc_metadata_batch_filter(calld->recv_initial_metadata, client_recv_filter,
                              &a);
-  calld->on_done_recv->cb(exec_ctx, calld->on_done_recv->cb_arg, error);
+  grpc_closure_run(exec_ctx, calld->on_done_recv_initial_metadata,
+                   GRPC_ERROR_REF(error));
+}
+
+static void hc_on_recv_trailing_metadata(grpc_exec_ctx *exec_ctx,
+                                         void *user_data, grpc_error *error) {
+  grpc_call_element *elem = user_data;
+  call_data *calld = elem->call_data;
+  client_recv_filter_args a;
+  a.elem = elem;
+  a.exec_ctx = exec_ctx;
+  grpc_metadata_batch_filter(calld->recv_trailing_metadata, client_recv_filter,
+                             &a);
+  grpc_closure_run(exec_ctx, calld->on_done_recv_trailing_metadata,
+                   GRPC_ERROR_REF(error));
 }
 
 static void hc_on_complete(grpc_exec_ctx *exec_ctx, void *user_data,
@@ -155,7 +183,7 @@ static void hc_on_complete(grpc_exec_ctx *exec_ctx, void *user_data,
 static void send_done(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
-  gpr_slice_buffer_reset_and_unref(&calld->slices);
+  grpc_slice_buffer_reset_and_unref(&calld->slices);
   calld->post_send->cb(exec_ctx, calld->post_send->cb_arg, error);
 }
 
@@ -176,10 +204,10 @@ static void continue_send_message(grpc_exec_ctx *exec_ctx,
   while (grpc_byte_stream_next(exec_ctx, calld->send_op.send_message,
                                &calld->incoming_slice, ~(size_t)0,
                                &calld->got_slice)) {
-    memcpy(wrptr, GPR_SLICE_START_PTR(calld->incoming_slice),
-           GPR_SLICE_LENGTH(calld->incoming_slice));
-    wrptr += GPR_SLICE_LENGTH(calld->incoming_slice);
-    gpr_slice_buffer_add(&calld->slices, calld->incoming_slice);
+    memcpy(wrptr, GRPC_SLICE_START_PTR(calld->incoming_slice),
+           GRPC_SLICE_LENGTH(calld->incoming_slice));
+    wrptr += GRPC_SLICE_LENGTH(calld->incoming_slice);
+    grpc_slice_buffer_add(&calld->slices, calld->incoming_slice);
     if (calld->send_length == calld->slices.length) {
       calld->send_message_blocked = false;
       break;
@@ -191,7 +219,7 @@ static void got_slice(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
   calld->send_message_blocked = false;
-  gpr_slice_buffer_add(&calld->slices, calld->incoming_slice);
+  grpc_slice_buffer_add(&calld->slices, calld->incoming_slice);
   if (calld->send_length == calld->slices.length) {
     /* Pass down the original send_message op that was blocked.*/
     grpc_slice_buffer_stream_init(&calld->replacement_stream, &calld->slices,
@@ -217,12 +245,15 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
     message, and the payload is below the size threshold, and all the data
     for this request is immediately available. */
     grpc_mdelem *method = GRPC_MDELEM_METHOD_POST;
-    calld->send_message_blocked = false;
     if ((op->send_initial_metadata_flags &
          GRPC_INITIAL_METADATA_CACHEABLE_REQUEST) &&
         op->send_message != NULL &&
         op->send_message->length < channeld->max_payload_size_for_get) {
       method = GRPC_MDELEM_METHOD_GET;
+      /* The following write to calld->send_message_blocked isn't racy with
+      reads in hc_start_transport_op (which deals with SEND_MESSAGE ops) because
+      being here means ops->send_message is not NULL, which is primarily
+      guarding the read there. */
       calld->send_message_blocked = true;
     } else if (op->send_initial_metadata_flags &
                GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) {
@@ -281,8 +312,15 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
   if (op->recv_initial_metadata != NULL) {
     /* substitute our callback for the higher callback */
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv = op->recv_initial_metadata_ready;
-    op->recv_initial_metadata_ready = &calld->hc_on_recv;
+    calld->on_done_recv_initial_metadata = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->hc_on_recv_initial_metadata;
+  }
+
+  if (op->recv_trailing_metadata != NULL) {
+    /* substitute our callback for the higher callback */
+    calld->recv_trailing_metadata = op->recv_trailing_metadata;
+    calld->on_done_recv_trailing_metadata = op->on_complete;
+    op->on_complete = &calld->hc_on_recv_trailing_metadata;
   }
 }
 
@@ -296,8 +334,7 @@ static void hc_start_transport_op(grpc_exec_ctx *exec_ctx,
   call_data *calld = elem->call_data;
   if (op->send_message != NULL && calld->send_message_blocked) {
     /* Don't forward the op. send_message contains slices that aren't ready
-    yet. The call will be forwarded by the op_complete of slice read call.
-    */
+    yet. The call will be forwarded by the op_complete of slice read call. */
   } else {
     grpc_call_next_op(exec_ctx, elem, op);
   }
@@ -308,11 +345,16 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
                                   grpc_call_element *elem,
                                   grpc_call_element_args *args) {
   call_data *calld = elem->call_data;
-  calld->on_done_recv = NULL;
+  calld->on_done_recv_initial_metadata = NULL;
+  calld->on_done_recv_trailing_metadata = NULL;
   calld->on_complete = NULL;
   calld->payload_bytes = NULL;
-  gpr_slice_buffer_init(&calld->slices);
-  grpc_closure_init(&calld->hc_on_recv, hc_on_recv, elem);
+  calld->send_message_blocked = false;
+  grpc_slice_buffer_init(&calld->slices);
+  grpc_closure_init(&calld->hc_on_recv_initial_metadata,
+                    hc_on_recv_initial_metadata, elem);
+  grpc_closure_init(&calld->hc_on_recv_trailing_metadata,
+                    hc_on_recv_trailing_metadata, elem);
   grpc_closure_init(&calld->hc_on_complete, hc_on_complete, elem);
   grpc_closure_init(&calld->got_slice, got_slice, elem);
   grpc_closure_init(&calld->send_done, send_done, elem);
@@ -324,7 +366,7 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                               const grpc_call_final_info *final_info,
                               void *ignored) {
   call_data *calld = elem->call_data;
-  gpr_slice_buffer_destroy(&calld->slices);
+  grpc_slice_buffer_destroy(&calld->slices);
 }
 
 static grpc_mdelem *scheme_from_args(const grpc_channel_args *args) {
@@ -415,9 +457,9 @@ static grpc_mdstr *user_agent_from_args(const grpc_channel_args *args,
 }
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   channel_data *chand = elem->channel_data;
   GPR_ASSERT(!args->is_last);
   GPR_ASSERT(args->optional_transport != NULL);
@@ -428,6 +470,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
       GRPC_MDSTR_USER_AGENT,
       user_agent_from_args(args->channel_args,
                            args->optional_transport->vtable->name));
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -448,4 +491,5 @@ const grpc_channel_filter grpc_http_client_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "http-client"};
diff --git a/src/core/lib/channel/http_server_filter.c b/src/core/lib/channel/http_server_filter.c
index f2221fb0fb..a5134ee21b 100644
--- a/src/core/lib/channel/http_server_filter.c
+++ b/src/core/lib/channel/http_server_filter.c
@@ -37,6 +37,7 @@
 #include <grpc/support/log.h>
 #include <string.h>
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/slice/percent_encoding.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 #define EXPECTED_CONTENT_TYPE "application/grpc"
@@ -68,7 +69,7 @@ typedef struct call_data {
   grpc_closure *recv_message_ready;
   grpc_closure *on_complete;
   grpc_byte_stream **pp_recv_message;
-  gpr_slice_buffer read_slice_buffer;
+  grpc_slice_buffer read_slice_buffer;
   grpc_slice_buffer_stream read_stream;
 
   /** Receive closures are chained: we inject this closure as the on_done_recv
@@ -86,6 +87,23 @@ typedef struct {
   grpc_exec_ctx *exec_ctx;
 } server_filter_args;
 
+static grpc_mdelem *server_filter_outgoing_metadata(void *user_data,
+                                                    grpc_mdelem *md) {
+  if (md->key == GRPC_MDSTR_GRPC_MESSAGE) {
+    grpc_slice pct_encoded_msg = grpc_percent_encode_slice(
+        md->value->slice, grpc_compatible_percent_encoding_unreserved_bytes);
+    if (grpc_slice_is_equivalent(pct_encoded_msg, md->value->slice)) {
+      grpc_slice_unref(pct_encoded_msg);
+      return md;
+    } else {
+      return grpc_mdelem_from_metadata_strings(
+          GRPC_MDSTR_GRPC_MESSAGE, grpc_mdstr_from_slice(pct_encoded_msg));
+    }
+  } else {
+    return md;
+  }
+}
+
 static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
   server_filter_args *a = user_data;
   grpc_call_element *elem = a->elem;
@@ -162,9 +180,8 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
     /* Retrieve the payload from the value of the 'grpc-internal-payload-bin'
        header field */
     calld->seen_payload_bin = 1;
-    gpr_slice_buffer_init(&calld->read_slice_buffer);
-    gpr_slice_buffer_add(&calld->read_slice_buffer,
-                         gpr_slice_ref(md->value->slice));
+    grpc_slice_buffer_add(&calld->read_slice_buffer,
+                          grpc_slice_ref(md->value->slice));
     grpc_slice_buffer_stream_init(&calld->read_stream,
                                   &calld->read_slice_buffer, 0);
     return NULL;
@@ -255,7 +272,7 @@ static void hs_recv_message_ready(grpc_exec_ctx *exec_ctx, void *user_data,
   }
 }
 
-static void hs_mutate_op(grpc_call_element *elem,
+static void hs_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                          grpc_transport_stream_op *op) {
   /* grab pointers to our data from the call element */
   call_data *calld = elem->call_data;
@@ -291,6 +308,12 @@ static void hs_mutate_op(grpc_call_element *elem,
       op->on_complete = &calld->hs_on_complete;
     }
   }
+
+  if (op->send_trailing_metadata) {
+    server_filter_args a = {elem, exec_ctx};
+    grpc_metadata_batch_filter(op->send_trailing_metadata,
+                               server_filter_outgoing_metadata, &a);
+  }
 }
 
 static void hs_start_transport_op(grpc_exec_ctx *exec_ctx,
@@ -298,7 +321,7 @@ static void hs_start_transport_op(grpc_exec_ctx *exec_ctx,
                                   grpc_transport_stream_op *op) {
   GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
   GPR_TIMER_BEGIN("hs_start_transport_op", 0);
-  hs_mutate_op(elem, op);
+  hs_mutate_op(exec_ctx, elem, op);
   grpc_call_next_op(exec_ctx, elem, op);
   GPR_TIMER_END("hs_start_transport_op", 0);
 }
@@ -314,19 +337,24 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
   grpc_closure_init(&calld->hs_on_recv, hs_on_recv, elem);
   grpc_closure_init(&calld->hs_on_complete, hs_on_complete, elem);
   grpc_closure_init(&calld->hs_recv_message_ready, hs_recv_message_ready, elem);
+  grpc_slice_buffer_init(&calld->read_slice_buffer);
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for call_data */
 static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                               const grpc_call_final_info *final_info,
-                              void *ignored) {}
+                              void *ignored) {
+  call_data *calld = elem->call_data;
+  grpc_slice_buffer_destroy(&calld->read_slice_buffer);
+}
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   GPR_ASSERT(!args->is_last);
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -344,4 +372,5 @@ const grpc_channel_filter grpc_http_server_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "http-server"};
diff --git a/src/core/lib/channel/message_size_filter.c b/src/core/lib/channel/message_size_filter.c
index 7dc5ae0df1..f05c789010 100644
--- a/src/core/lib/channel/message_size_filter.c
+++ b/src/core/lib/channel/message_size_filter.c
@@ -34,16 +34,14 @@
 #include <limits.h>
 #include <string.h>
 
+#include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/transport/method_config.h"
-
-#define DEFAULT_MAX_SEND_MESSAGE_LENGTH -1  // Unlimited.
-// The protobuf library will (by default) start warning at 100 megs.
-#define DEFAULT_MAX_RECV_MESSAGE_LENGTH (4 * 1024 * 1024)
+#include "src/core/lib/support/string.h"
+#include "src/core/lib/transport/service_config.h"
 
 typedef struct message_size_limits {
   int max_send_size;
@@ -56,30 +54,29 @@ static void* message_size_limits_copy(void* value) {
   return new_value;
 }
 
-static int message_size_limits_cmp(void* value1, void* value2) {
-  const message_size_limits* v1 = value1;
-  const message_size_limits* v2 = value2;
-  if (v1->max_send_size > v2->max_send_size) return 1;
-  if (v1->max_send_size < v2->max_send_size) return -1;
-  if (v1->max_recv_size > v2->max_recv_size) return 1;
-  if (v1->max_recv_size < v2->max_recv_size) return -1;
-  return 0;
-}
-
 static const grpc_mdstr_hash_table_vtable message_size_limits_vtable = {
-    gpr_free, message_size_limits_copy, message_size_limits_cmp};
+    gpr_free, message_size_limits_copy};
 
-static void* method_config_convert_value(
-    const grpc_method_config* method_config) {
+static void* message_size_limits_create_from_json(const grpc_json* json) {
+  int max_request_message_bytes = -1;
+  int max_response_message_bytes = -1;
+  for (grpc_json* field = json->child; field != NULL; field = field->next) {
+    if (field->key == NULL) continue;
+    if (strcmp(field->key, "maxRequestMessageBytes") == 0) {
+      if (max_request_message_bytes >= 0) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_STRING) return NULL;
+      max_request_message_bytes = gpr_parse_nonnegative_int(field->value);
+      if (max_request_message_bytes == -1) return NULL;
+    } else if (strcmp(field->key, "maxResponseMessageBytes") == 0) {
+      if (max_response_message_bytes >= 0) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_STRING) return NULL;
+      max_response_message_bytes = gpr_parse_nonnegative_int(field->value);
+      if (max_response_message_bytes == -1) return NULL;
+    }
+  }
   message_size_limits* value = gpr_malloc(sizeof(message_size_limits));
-  const int32_t* max_request_message_bytes =
-      grpc_method_config_get_max_request_message_bytes(method_config);
-  value->max_send_size =
-      max_request_message_bytes != NULL ? *max_request_message_bytes : -1;
-  const int32_t* max_response_message_bytes =
-      grpc_method_config_get_max_response_message_bytes(method_config);
-  value->max_recv_size =
-      max_response_message_bytes != NULL ? *max_response_message_bytes : -1;
+  value->max_send_size = max_request_message_bytes;
+  value->max_recv_size = max_response_message_bytes;
   return value;
 }
 
@@ -141,7 +138,7 @@ static void start_transport_stream_op(grpc_exec_ctx* exec_ctx,
     char* message_string;
     gpr_asprintf(&message_string, "Sent message larger than max (%u vs. %d)",
                  op->send_message->length, calld->max_send_size);
-    gpr_slice message = gpr_slice_from_copied_string(message_string);
+    grpc_slice message = grpc_slice_from_copied_string(message_string);
     gpr_free(message_string);
     grpc_call_element_send_close_with_message(
         exec_ctx, elem, GRPC_STATUS_INVALID_ARGUMENT, &message);
@@ -195,26 +192,26 @@ static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
                               void* ignored) {}
 
 // Constructor for channel_data.
-static void init_channel_elem(grpc_exec_ctx* exec_ctx,
-                              grpc_channel_element* elem,
-                              grpc_channel_element_args* args) {
+static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
+                                     grpc_channel_element* elem,
+                                     grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   channel_data* chand = elem->channel_data;
   memset(chand, 0, sizeof(*chand));
-  chand->max_send_size = DEFAULT_MAX_SEND_MESSAGE_LENGTH;
-  chand->max_recv_size = DEFAULT_MAX_RECV_MESSAGE_LENGTH;
+  chand->max_send_size = GRPC_DEFAULT_MAX_SEND_MESSAGE_LENGTH;
+  chand->max_recv_size = GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH;
   for (size_t i = 0; i < args->channel_args->num_args; ++i) {
     if (strcmp(args->channel_args->args[i].key,
                GRPC_ARG_MAX_SEND_MESSAGE_LENGTH) == 0) {
-      const grpc_integer_options options = {DEFAULT_MAX_SEND_MESSAGE_LENGTH, 0,
-                                            INT_MAX};
+      const grpc_integer_options options = {
+          GRPC_DEFAULT_MAX_SEND_MESSAGE_LENGTH, 0, INT_MAX};
       chand->max_send_size =
           grpc_channel_arg_get_integer(&args->channel_args->args[i], options);
     }
     if (strcmp(args->channel_args->args[i].key,
                GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH) == 0) {
-      const grpc_integer_options options = {DEFAULT_MAX_RECV_MESSAGE_LENGTH, 0,
-                                            INT_MAX};
+      const grpc_integer_options options = {
+          GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH, 0, INT_MAX};
       chand->max_recv_size =
           grpc_channel_arg_get_integer(&args->channel_args->args[i], options);
     }
@@ -223,11 +220,18 @@ static void init_channel_elem(grpc_exec_ctx* exec_ctx,
   const grpc_arg* channel_arg =
       grpc_channel_args_find(args->channel_args, GRPC_ARG_SERVICE_CONFIG);
   if (channel_arg != NULL) {
-    GPR_ASSERT(channel_arg->type == GRPC_ARG_POINTER);
-    chand->method_limit_table = grpc_method_config_table_convert(
-        (grpc_method_config_table*)channel_arg->value.pointer.p,
-        method_config_convert_value, &message_size_limits_vtable);
+    GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
+    grpc_service_config* service_config =
+        grpc_service_config_create(channel_arg->value.string);
+    if (service_config != NULL) {
+      chand->method_limit_table =
+          grpc_service_config_create_method_config_table(
+              service_config, message_size_limits_create_from_json,
+              &message_size_limits_vtable);
+      grpc_service_config_destroy(service_config);
+    }
   }
+  return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.
@@ -248,4 +252,5 @@ const grpc_channel_filter grpc_message_size_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "message_size"};
diff --git a/src/core/lib/compression/message_compress.c b/src/core/lib/compression/message_compress.c
index cbe0b5a285..6c245acf61 100644
--- a/src/core/lib/compression/message_compress.c
+++ b/src/core/lib/compression/message_compress.c
@@ -42,31 +42,31 @@
 
 #define OUTPUT_BLOCK_SIZE 1024
 
-static int zlib_body(z_stream* zs, gpr_slice_buffer* input,
-                     gpr_slice_buffer* output,
+static int zlib_body(z_stream* zs, grpc_slice_buffer* input,
+                     grpc_slice_buffer* output,
                      int (*flate)(z_stream* zs, int flush)) {
   int r;
   int flush;
   size_t i;
-  gpr_slice outbuf = gpr_slice_malloc(OUTPUT_BLOCK_SIZE);
+  grpc_slice outbuf = grpc_slice_malloc(OUTPUT_BLOCK_SIZE);
   const uInt uint_max = ~(uInt)0;
 
-  GPR_ASSERT(GPR_SLICE_LENGTH(outbuf) <= uint_max);
-  zs->avail_out = (uInt)GPR_SLICE_LENGTH(outbuf);
-  zs->next_out = GPR_SLICE_START_PTR(outbuf);
+  GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
+  zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
+  zs->next_out = GRPC_SLICE_START_PTR(outbuf);
   flush = Z_NO_FLUSH;
   for (i = 0; i < input->count; i++) {
     if (i == input->count - 1) flush = Z_FINISH;
-    GPR_ASSERT(GPR_SLICE_LENGTH(input->slices[i]) <= uint_max);
-    zs->avail_in = (uInt)GPR_SLICE_LENGTH(input->slices[i]);
-    zs->next_in = GPR_SLICE_START_PTR(input->slices[i]);
+    GPR_ASSERT(GRPC_SLICE_LENGTH(input->slices[i]) <= uint_max);
+    zs->avail_in = (uInt)GRPC_SLICE_LENGTH(input->slices[i]);
+    zs->next_in = GRPC_SLICE_START_PTR(input->slices[i]);
     do {
       if (zs->avail_out == 0) {
-        gpr_slice_buffer_add_indexed(output, outbuf);
-        outbuf = gpr_slice_malloc(OUTPUT_BLOCK_SIZE);
-        GPR_ASSERT(GPR_SLICE_LENGTH(outbuf) <= uint_max);
-        zs->avail_out = (uInt)GPR_SLICE_LENGTH(outbuf);
-        zs->next_out = GPR_SLICE_START_PTR(outbuf);
+        grpc_slice_buffer_add_indexed(output, outbuf);
+        outbuf = grpc_slice_malloc(OUTPUT_BLOCK_SIZE);
+        GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
+        zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
+        zs->next_out = GRPC_SLICE_START_PTR(outbuf);
       }
       r = flate(zs, flush);
       if (r < 0 && r != Z_BUF_ERROR /* not fatal */) {
@@ -82,12 +82,12 @@ static int zlib_body(z_stream* zs, gpr_slice_buffer* input,
 
   GPR_ASSERT(outbuf.refcount);
   outbuf.data.refcounted.length -= zs->avail_out;
-  gpr_slice_buffer_add_indexed(output, outbuf);
+  grpc_slice_buffer_add_indexed(output, outbuf);
 
   return 1;
 
 error:
-  gpr_slice_unref(outbuf);
+  grpc_slice_unref(outbuf);
   return 0;
 }
 
@@ -97,7 +97,7 @@ static void* zalloc_gpr(void* opaque, unsigned int items, unsigned int size) {
 
 static void zfree_gpr(void* opaque, void* address) { gpr_free(address); }
 
-static int zlib_compress(gpr_slice_buffer* input, gpr_slice_buffer* output,
+static int zlib_compress(grpc_slice_buffer* input, grpc_slice_buffer* output,
                          int gzip) {
   z_stream zs;
   int r;
@@ -113,7 +113,7 @@ static int zlib_compress(gpr_slice_buffer* input, gpr_slice_buffer* output,
   r = zlib_body(&zs, input, output, deflate) && output->length < input->length;
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      gpr_slice_unref(output->slices[i]);
+      grpc_slice_unref(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -122,7 +122,7 @@ static int zlib_compress(gpr_slice_buffer* input, gpr_slice_buffer* output,
   return r;
 }
 
-static int zlib_decompress(gpr_slice_buffer* input, gpr_slice_buffer* output,
+static int zlib_decompress(grpc_slice_buffer* input, grpc_slice_buffer* output,
                            int gzip) {
   z_stream zs;
   int r;
@@ -137,7 +137,7 @@ static int zlib_decompress(gpr_slice_buffer* input, gpr_slice_buffer* output,
   r = zlib_body(&zs, input, output, inflate);
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      gpr_slice_unref(output->slices[i]);
+      grpc_slice_unref(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -146,16 +146,16 @@ static int zlib_decompress(gpr_slice_buffer* input, gpr_slice_buffer* output,
   return r;
 }
 
-static int copy(gpr_slice_buffer* input, gpr_slice_buffer* output) {
+static int copy(grpc_slice_buffer* input, grpc_slice_buffer* output) {
   size_t i;
   for (i = 0; i < input->count; i++) {
-    gpr_slice_buffer_add(output, gpr_slice_ref(input->slices[i]));
+    grpc_slice_buffer_add(output, grpc_slice_ref(input->slices[i]));
   }
   return 1;
 }
 
 static int compress_inner(grpc_compression_algorithm algorithm,
-                          gpr_slice_buffer* input, gpr_slice_buffer* output) {
+                          grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       /* the fallback path always needs to be send uncompressed: we simply
@@ -173,7 +173,7 @@ static int compress_inner(grpc_compression_algorithm algorithm,
 }
 
 int grpc_msg_compress(grpc_compression_algorithm algorithm,
-                      gpr_slice_buffer* input, gpr_slice_buffer* output) {
+                      grpc_slice_buffer* input, grpc_slice_buffer* output) {
   if (!compress_inner(algorithm, input, output)) {
     copy(input, output);
     return 0;
@@ -182,7 +182,7 @@ int grpc_msg_compress(grpc_compression_algorithm algorithm,
 }
 
 int grpc_msg_decompress(grpc_compression_algorithm algorithm,
-                        gpr_slice_buffer* input, gpr_slice_buffer* output) {
+                        grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       return copy(input, output);
diff --git a/src/core/lib/compression/message_compress.h b/src/core/lib/compression/message_compress.h
index c69eaaf006..448d36a863 100644
--- a/src/core/lib/compression/message_compress.h
+++ b/src/core/lib/compression/message_compress.h
@@ -35,18 +35,18 @@
 #define GRPC_CORE_LIB_COMPRESSION_MESSAGE_COMPRESS_H
 
 #include <grpc/compression.h>
-#include <grpc/support/slice_buffer.h>
+#include <grpc/slice_buffer.h>
 
 /* compress 'input' to 'output' using 'algorithm'.
    On success, appends compressed slices to output and returns 1.
    On failure, appends uncompressed slices to output and returns 0. */
 int grpc_msg_compress(grpc_compression_algorithm algorithm,
-                      gpr_slice_buffer* input, gpr_slice_buffer* output);
+                      grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 /* decompress 'input' to 'output' using 'algorithm'.
    On success, appends slices to output and returns 1.
    On failure, output is unchanged, and returns 0. */
 int grpc_msg_decompress(grpc_compression_algorithm algorithm,
-                        gpr_slice_buffer* input, gpr_slice_buffer* output);
+                        grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 #endif /* GRPC_CORE_LIB_COMPRESSION_MESSAGE_COMPRESS_H */
diff --git a/src/core/lib/http/format_request.c b/src/core/lib/http/format_request.c
index e818b70113..024664b6ee 100644
--- a/src/core/lib/http/format_request.c
+++ b/src/core/lib/http/format_request.c
@@ -37,8 +37,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
-#include <grpc/support/slice.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 #include "src/core/lib/support/string.h"
@@ -65,7 +65,8 @@ static void fill_common_header(const grpc_httpcli_request *request,
   }
 }
 
-gpr_slice grpc_httpcli_format_get_request(const grpc_httpcli_request *request) {
+grpc_slice grpc_httpcli_format_get_request(
+    const grpc_httpcli_request *request) {
   gpr_strvec out;
   char *flat;
   size_t flat_len;
@@ -78,12 +79,12 @@ gpr_slice grpc_httpcli_format_get_request(const grpc_httpcli_request *request) {
   flat = gpr_strvec_flatten(&out, &flat_len);
   gpr_strvec_destroy(&out);
 
-  return gpr_slice_new(flat, flat_len, gpr_free);
+  return grpc_slice_new(flat, flat_len, gpr_free);
 }
 
-gpr_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
-                                           const char *body_bytes,
-                                           size_t body_size) {
+grpc_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
+                                            const char *body_bytes,
+                                            size_t body_size) {
   gpr_strvec out;
   char *tmp;
   size_t out_len;
@@ -117,10 +118,10 @@ gpr_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
     out_len += body_size;
   }
 
-  return gpr_slice_new(tmp, out_len, gpr_free);
+  return grpc_slice_new(tmp, out_len, gpr_free);
 }
 
-gpr_slice grpc_httpcli_format_connect_request(
+grpc_slice grpc_httpcli_format_connect_request(
     const grpc_httpcli_request *request) {
   gpr_strvec out;
   gpr_strvec_init(&out);
@@ -130,5 +131,5 @@ gpr_slice grpc_httpcli_format_connect_request(
   size_t flat_len;
   char *flat = gpr_strvec_flatten(&out, &flat_len);
   gpr_strvec_destroy(&out);
-  return gpr_slice_new(flat, flat_len, gpr_free);
+  return grpc_slice_new(flat, flat_len, gpr_free);
 }
diff --git a/src/core/lib/http/format_request.h b/src/core/lib/http/format_request.h
index 7abd55f2f7..1c8e3f68c5 100644
--- a/src/core/lib/http/format_request.h
+++ b/src/core/lib/http/format_request.h
@@ -34,14 +34,14 @@
 #ifndef GRPC_CORE_LIB_HTTP_FORMAT_REQUEST_H
 #define GRPC_CORE_LIB_HTTP_FORMAT_REQUEST_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/lib/http/httpcli.h"
 
-gpr_slice grpc_httpcli_format_get_request(const grpc_httpcli_request *request);
-gpr_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
-                                           const char *body_bytes,
-                                           size_t body_size);
-gpr_slice grpc_httpcli_format_connect_request(
+grpc_slice grpc_httpcli_format_get_request(const grpc_httpcli_request *request);
+grpc_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
+                                            const char *body_bytes,
+                                            size_t body_size);
+grpc_slice grpc_httpcli_format_connect_request(
     const grpc_httpcli_request *request);
 
 #endif /* GRPC_CORE_LIB_HTTP_FORMAT_REQUEST_H */
diff --git a/src/core/lib/http/httpcli.c b/src/core/lib/http/httpcli.c
index 411e669b53..1035f31109 100644
--- a/src/core/lib/http/httpcli.c
+++ b/src/core/lib/http/httpcli.c
@@ -50,7 +50,7 @@
 #include "src/core/lib/support/string.h"
 
 typedef struct {
-  gpr_slice request_text;
+  grpc_slice request_text;
   grpc_http_parser parser;
   grpc_resolved_addresses *addresses;
   size_t next_address;
@@ -64,8 +64,8 @@ typedef struct {
   grpc_httpcli_context *context;
   grpc_polling_entity *pollent;
   grpc_iomgr_object iomgr_obj;
-  gpr_slice_buffer incoming;
-  gpr_slice_buffer outgoing;
+  grpc_slice_buffer incoming;
+  grpc_slice_buffer outgoing;
   grpc_closure on_read;
   grpc_closure done_write;
   grpc_closure connected;
@@ -111,12 +111,12 @@ static void finish(grpc_exec_ctx *exec_ctx, internal_request *req,
   if (req->ep != NULL) {
     grpc_endpoint_destroy(exec_ctx, req->ep);
   }
-  gpr_slice_unref(req->request_text);
+  grpc_slice_unref(req->request_text);
   gpr_free(req->host);
   gpr_free(req->ssl_host_override);
   grpc_iomgr_unregister_object(&req->iomgr_obj);
-  gpr_slice_buffer_destroy(&req->incoming);
-  gpr_slice_buffer_destroy(&req->outgoing);
+  grpc_slice_buffer_destroy(&req->incoming);
+  grpc_slice_buffer_destroy(&req->outgoing);
   GRPC_ERROR_UNREF(req->overall_error);
   grpc_resource_quota_internal_unref(exec_ctx, req->resource_quota);
   gpr_free(req);
@@ -144,7 +144,7 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data,
   size_t i;
 
   for (i = 0; i < req->incoming.count; i++) {
-    if (GPR_SLICE_LENGTH(req->incoming.slices[i])) {
+    if (GRPC_SLICE_LENGTH(req->incoming.slices[i])) {
       req->have_read_byte = 1;
       grpc_error *err =
           grpc_http_parser_parse(&req->parser, req->incoming.slices[i], NULL);
@@ -178,8 +178,8 @@ static void done_write(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 }
 
 static void start_write(grpc_exec_ctx *exec_ctx, internal_request *req) {
-  gpr_slice_ref(req->request_text);
-  gpr_slice_buffer_add(&req->outgoing, req->request_text);
+  grpc_slice_ref(req->request_text);
+  grpc_slice_buffer_add(&req->outgoing, req->request_text);
   grpc_endpoint_write(exec_ctx, req->ep, &req->outgoing, &req->done_write);
 }
 
@@ -253,7 +253,7 @@ static void internal_request_begin(grpc_exec_ctx *exec_ctx,
                                    const grpc_httpcli_request *request,
                                    gpr_timespec deadline, grpc_closure *on_done,
                                    grpc_httpcli_response *response,
-                                   const char *name, gpr_slice request_text) {
+                                   const char *name, grpc_slice request_text) {
   internal_request *req = gpr_malloc(sizeof(internal_request));
   memset(req, 0, sizeof(*req));
   req->request_text = request_text;
@@ -268,8 +268,8 @@ static void internal_request_begin(grpc_exec_ctx *exec_ctx,
   req->resource_quota = grpc_resource_quota_internal_ref(resource_quota);
   grpc_closure_init(&req->on_read, on_read, req);
   grpc_closure_init(&req->done_write, done_write, req);
-  gpr_slice_buffer_init(&req->incoming);
-  gpr_slice_buffer_init(&req->outgoing);
+  grpc_slice_buffer_init(&req->incoming);
+  grpc_slice_buffer_init(&req->outgoing);
   grpc_iomgr_register_object(&req->iomgr_obj, name);
   req->host = gpr_strdup(request->host);
   req->ssl_host_override = gpr_strdup(request->ssl_host_override);
@@ -278,6 +278,7 @@ static void internal_request_begin(grpc_exec_ctx *exec_ctx,
   grpc_polling_entity_add_to_pollset_set(exec_ctx, req->pollent,
                                          req->context->pollset_set);
   grpc_resolve_address(exec_ctx, request->host, req->handshaker->default_port,
+                       req->context->pollset_set,
                        grpc_closure_create(on_resolved, req), &req->addresses);
 }
 
diff --git a/src/core/lib/http/httpcli_security_connector.c b/src/core/lib/http/httpcli_security_connector.c
index 0006e809a6..14cdb1dab3 100644
--- a/src/core/lib/http/httpcli_security_connector.c
+++ b/src/core/lib/http/httpcli_security_connector.c
@@ -38,7 +38,9 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
-#include "src/core/lib/security/transport/handshake.h"
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/security/transport/security_handshaker.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/tsi/ssl_transport_security.h"
 
@@ -58,52 +60,43 @@ static void httpcli_ssl_destroy(grpc_security_connector *sc) {
   gpr_free(sc);
 }
 
-static void httpcli_ssl_do_handshake(grpc_exec_ctx *exec_ctx,
-                                     grpc_channel_security_connector *sc,
-                                     grpc_endpoint *nonsecure_endpoint,
-                                     gpr_slice_buffer *read_buffer,
-                                     gpr_timespec deadline,
-                                     grpc_security_handshake_done_cb cb,
-                                     void *user_data) {
+static void httpcli_ssl_add_handshakers(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_security_connector *sc,
+                                        grpc_handshake_manager *handshake_mgr) {
   grpc_httpcli_ssl_channel_security_connector *c =
       (grpc_httpcli_ssl_channel_security_connector *)sc;
-  tsi_result result = TSI_OK;
-  tsi_handshaker *handshaker;
-  if (c->handshaker_factory == NULL) {
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL);
-    return;
-  }
-  result = tsi_ssl_handshaker_factory_create_handshaker(
-      c->handshaker_factory, c->secure_peer_name, &handshaker);
-  if (result != TSI_OK) {
-    gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.",
-            tsi_result_to_string(result));
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL);
-  } else {
-    grpc_do_security_handshake(exec_ctx, handshaker, &sc->base, true,
-                               nonsecure_endpoint, read_buffer, deadline, cb,
-                               user_data);
+  tsi_handshaker *handshaker = NULL;
+  if (c->handshaker_factory != NULL) {
+    tsi_result result = tsi_ssl_handshaker_factory_create_handshaker(
+        c->handshaker_factory, c->secure_peer_name, &handshaker);
+    if (result != TSI_OK) {
+      gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.",
+              tsi_result_to_string(result));
+    }
   }
+  grpc_handshake_manager_add(
+      handshake_mgr,
+      grpc_security_handshaker_create(exec_ctx, handshaker, &sc->base));
 }
 
 static void httpcli_ssl_check_peer(grpc_exec_ctx *exec_ctx,
                                    grpc_security_connector *sc, tsi_peer peer,
-                                   grpc_security_peer_check_cb cb,
-                                   void *user_data) {
+                                   grpc_auth_context **auth_context,
+                                   grpc_closure *on_peer_checked) {
   grpc_httpcli_ssl_channel_security_connector *c =
       (grpc_httpcli_ssl_channel_security_connector *)sc;
-  grpc_security_status status = GRPC_SECURITY_OK;
+  grpc_error *error = GRPC_ERROR_NONE;
 
   /* Check the peer name. */
   if (c->secure_peer_name != NULL &&
       !tsi_ssl_peer_matches_name(&peer, c->secure_peer_name)) {
-    gpr_log(GPR_ERROR, "Peer name %s is not in peer certificate",
-            c->secure_peer_name);
-    status = GRPC_SECURITY_ERROR;
+    char *msg;
+    gpr_asprintf(&msg, "Peer name %s is not in peer certificate",
+                 c->secure_peer_name);
+    error = GRPC_ERROR_CREATE(msg);
+    gpr_free(msg);
   }
-  cb(exec_ctx, user_data, status, NULL);
+  grpc_exec_ctx_sched(exec_ctx, on_peer_checked, error, NULL);
   tsi_peer_destruct(&peer);
 }
 
@@ -140,7 +133,7 @@ static grpc_security_status httpcli_ssl_channel_security_connector_create(
     *sc = NULL;
     return GRPC_SECURITY_ERROR;
   }
-  c->base.do_handshake = httpcli_ssl_do_handshake;
+  c->base.add_handshakers = httpcli_ssl_add_handshakers;
   *sc = &c->base;
   return GRPC_SECURITY_OK;
 }
@@ -150,19 +143,25 @@ static grpc_security_status httpcli_ssl_channel_security_connector_create(
 typedef struct {
   void (*func)(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *endpoint);
   void *arg;
+  grpc_handshake_manager *handshake_mgr;
 } on_done_closure;
 
-static void on_secure_transport_setup_done(grpc_exec_ctx *exec_ctx, void *rp,
-                                           grpc_security_status status,
-                                           grpc_endpoint *secure_endpoint,
-                                           grpc_auth_context *auth_context) {
-  on_done_closure *c = rp;
-  if (status != GRPC_SECURITY_OK) {
-    gpr_log(GPR_ERROR, "Secure transport setup failed with error %d.", status);
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
+                              grpc_error *error) {
+  grpc_handshaker_args *args = arg;
+  on_done_closure *c = args->user_data;
+  if (error != GRPC_ERROR_NONE) {
+    const char *msg = grpc_error_string(error);
+    gpr_log(GPR_ERROR, "Secure transport setup failed: %s", msg);
+    grpc_error_free_string(msg);
     c->func(exec_ctx, c->arg, NULL);
   } else {
-    c->func(exec_ctx, c->arg, secure_endpoint);
+    grpc_channel_args_destroy(args->args);
+    grpc_slice_buffer_destroy(args->read_buffer);
+    gpr_free(args->read_buffer);
+    c->func(exec_ctx, c->arg, args->endpoint);
   }
+  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
   gpr_free(c);
 }
 
@@ -183,11 +182,15 @@ static void ssl_handshake(grpc_exec_ctx *exec_ctx, void *arg,
   }
   c->func = on_done;
   c->arg = arg;
+  c->handshake_mgr = grpc_handshake_manager_create();
   GPR_ASSERT(httpcli_ssl_channel_security_connector_create(
                  pem_root_certs, pem_root_certs_size, host, &sc) ==
              GRPC_SECURITY_OK);
-  grpc_channel_security_connector_do_handshake(
-      exec_ctx, sc, tcp, NULL, deadline, on_secure_transport_setup_done, c);
+  grpc_channel_security_connector_add_handshakers(exec_ctx, sc,
+                                                  c->handshake_mgr);
+  grpc_handshake_manager_do_handshake(
+      exec_ctx, c->handshake_mgr, tcp, NULL /* channel_args */, deadline,
+      NULL /* acceptor */, on_handshake_done, c /* user_data */);
   GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "httpcli");
 }
 
diff --git a/src/core/lib/http/parser.c b/src/core/lib/http/parser.c
index be9e9b6b63..2f84adc187 100644
--- a/src/core/lib/http/parser.c
+++ b/src/core/lib/http/parser.c
@@ -333,12 +333,12 @@ void grpc_http_response_destroy(grpc_http_response *response) {
   gpr_free(response->hdrs);
 }
 
-grpc_error *grpc_http_parser_parse(grpc_http_parser *parser, gpr_slice slice,
+grpc_error *grpc_http_parser_parse(grpc_http_parser *parser, grpc_slice slice,
                                    size_t *start_of_body) {
-  for (size_t i = 0; i < GPR_SLICE_LENGTH(slice); i++) {
+  for (size_t i = 0; i < GRPC_SLICE_LENGTH(slice); i++) {
     bool found_body_start = false;
     grpc_error *err =
-        addbyte(parser, GPR_SLICE_START_PTR(slice)[i], &found_body_start);
+        addbyte(parser, GRPC_SLICE_START_PTR(slice)[i], &found_body_start);
     if (err != GRPC_ERROR_NONE) return err;
     if (found_body_start && start_of_body != NULL) *start_of_body = i + 1;
   }
diff --git a/src/core/lib/http/parser.h b/src/core/lib/http/parser.h
index fab42979cd..a68011dd43 100644
--- a/src/core/lib/http/parser.h
+++ b/src/core/lib/http/parser.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_CORE_LIB_HTTP_PARSER_H
 #define GRPC_CORE_LIB_HTTP_PARSER_H
 
+#include <grpc/slice.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
 #include "src/core/lib/iomgr/error.h"
 
 /* Maximum length of a header string of the form 'Key: Value\r\n' */
@@ -114,7 +114,7 @@ void grpc_http_parser_init(grpc_http_parser *parser, grpc_http_type type,
 void grpc_http_parser_destroy(grpc_http_parser *parser);
 
 /* Sets \a start_of_body to the offset in \a slice of the start of the body. */
-grpc_error *grpc_http_parser_parse(grpc_http_parser *parser, gpr_slice slice,
+grpc_error *grpc_http_parser_parse(grpc_http_parser *parser, grpc_slice slice,
                                    size_t *start_of_body);
 grpc_error *grpc_http_parser_eof(grpc_http_parser *parser);
 
diff --git a/src/core/lib/iomgr/combiner.c b/src/core/lib/iomgr/combiner.c
index 60ee14eb23..cfc67020ae 100644
--- a/src/core/lib/iomgr/combiner.c
+++ b/src/core/lib/iomgr/combiner.c
@@ -90,6 +90,12 @@ static bool is_covered_by_poller(grpc_combiner *lock) {
          gpr_atm_acq_load(&lock->elements_covered_by_poller) > 0;
 }
 
+#define IS_COVERED_BY_POLLER_FMT "(final=%d elems=%" PRIdPTR ")->%d"
+#define IS_COVERED_BY_POLLER_ARGS(lock)                      \
+  (lock)->final_list_covered_by_poller,                      \
+      gpr_atm_acq_load(&(lock)->elements_covered_by_poller), \
+      is_covered_by_poller((lock))
+
 grpc_combiner *grpc_combiner_create(grpc_workqueue *optional_workqueue) {
   grpc_combiner *lock = gpr_malloc(sizeof(*lock));
   lock->next_combiner_on_this_exec_ctx = NULL;
@@ -197,9 +203,10 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx *exec_ctx) {
   GRPC_COMBINER_TRACE(
       gpr_log(GPR_DEBUG,
               "C:%p grpc_combiner_continue_exec_ctx workqueue=%p "
-              "is_covered_by_poller=%d exec_ctx_ready_to_finish=%d "
+              "is_covered_by_poller=" IS_COVERED_BY_POLLER_FMT
+              " exec_ctx_ready_to_finish=%d "
               "time_to_execute_final_list=%d",
-              lock, lock->optional_workqueue, is_covered_by_poller(lock),
+              lock, lock->optional_workqueue, IS_COVERED_BY_POLLER_ARGS(lock),
               grpc_exec_ctx_ready_to_finish(exec_ctx),
               lock->time_to_execute_final_list));
 
diff --git a/src/core/lib/iomgr/endpoint.c b/src/core/lib/iomgr/endpoint.c
index 74fa9c45df..2d300f4560 100644
--- a/src/core/lib/iomgr/endpoint.c
+++ b/src/core/lib/iomgr/endpoint.c
@@ -34,12 +34,12 @@
 #include "src/core/lib/iomgr/endpoint.h"
 
 void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        gpr_slice_buffer* slices, grpc_closure* cb) {
+                        grpc_slice_buffer* slices, grpc_closure* cb) {
   ep->vtable->read(exec_ctx, ep, slices, cb);
 }
 
 void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         gpr_slice_buffer* slices, grpc_closure* cb) {
+                         grpc_slice_buffer* slices, grpc_closure* cb) {
   ep->vtable->write(exec_ctx, ep, slices, cb);
 }
 
@@ -66,6 +66,8 @@ char* grpc_endpoint_get_peer(grpc_endpoint* ep) {
   return ep->vtable->get_peer(ep);
 }
 
+int grpc_endpoint_get_fd(grpc_endpoint* ep) { return ep->vtable->get_fd(ep); }
+
 grpc_workqueue* grpc_endpoint_get_workqueue(grpc_endpoint* ep) {
   return ep->vtable->get_workqueue(ep);
 }
diff --git a/src/core/lib/iomgr/endpoint.h b/src/core/lib/iomgr/endpoint.h
index 0ac5486ff5..1609b64f2b 100644
--- a/src/core/lib/iomgr/endpoint.h
+++ b/src/core/lib/iomgr/endpoint.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_CORE_LIB_IOMGR_ENDPOINT_H
 #define GRPC_CORE_LIB_IOMGR_ENDPOINT_H
 
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/time.h>
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/pollset_set.h"
@@ -49,9 +49,9 @@ typedef struct grpc_endpoint_vtable grpc_endpoint_vtable;
 
 struct grpc_endpoint_vtable {
   void (*read)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-               gpr_slice_buffer *slices, grpc_closure *cb);
+               grpc_slice_buffer *slices, grpc_closure *cb);
   void (*write)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                gpr_slice_buffer *slices, grpc_closure *cb);
+                grpc_slice_buffer *slices, grpc_closure *cb);
   grpc_workqueue *(*get_workqueue)(grpc_endpoint *ep);
   void (*add_to_pollset)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
                          grpc_pollset *pollset);
@@ -61,6 +61,7 @@ struct grpc_endpoint_vtable {
   void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep);
   grpc_resource_user *(*get_resource_user)(grpc_endpoint *ep);
   char *(*get_peer)(grpc_endpoint *ep);
+  int (*get_fd)(grpc_endpoint *ep);
 };
 
 /* When data is available on the connection, calls the callback with slices.
@@ -69,10 +70,14 @@ struct grpc_endpoint_vtable {
    Valid slices may be placed into \a slices even when the callback is
    invoked with error != GRPC_ERROR_NONE. */
 void grpc_endpoint_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                        gpr_slice_buffer *slices, grpc_closure *cb);
+                        grpc_slice_buffer *slices, grpc_closure *cb);
 
 char *grpc_endpoint_get_peer(grpc_endpoint *ep);
 
+/* Get the file descriptor used by \a ep. Return -1 if \a ep is not using an fd.
+   */
+int grpc_endpoint_get_fd(grpc_endpoint *ep);
+
 /* Retrieve a reference to the workqueue associated with this endpoint */
 grpc_workqueue *grpc_endpoint_get_workqueue(grpc_endpoint *ep);
 
@@ -87,7 +92,7 @@ grpc_workqueue *grpc_endpoint_get_workqueue(grpc_endpoint *ep);
    it is a valid slice buffer.
    */
 void grpc_endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                         gpr_slice_buffer *slices, grpc_closure *cb);
+                         grpc_slice_buffer *slices, grpc_closure *cb);
 
 /* Causes any pending and future read/write callbacks to run immediately with
    success==0 */
diff --git a/src/core/lib/iomgr/endpoint_pair_uv.c b/src/core/lib/iomgr/endpoint_pair_uv.c
index 7941e20388..ff24894c6d 100644
--- a/src/core/lib/iomgr/endpoint_pair_uv.c
+++ b/src/core/lib/iomgr/endpoint_pair_uv.c
@@ -41,8 +41,9 @@
 
 #include "src/core/lib/iomgr/endpoint_pair.h"
 
-grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
-                                                   size_t read_slice_size) {
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(
+    const char *name, grpc_resource_quota *resource_quota,
+    size_t read_slice_size) {
   grpc_endpoint_pair endpoint_pair;
   // TODO(mlumish): implement this properly under libuv
   GPR_ASSERT(false &&
diff --git a/src/core/lib/iomgr/endpoint_pair_windows.c b/src/core/lib/iomgr/endpoint_pair_windows.c
index 5c78c95492..93f71b745c 100644
--- a/src/core/lib/iomgr/endpoint_pair_windows.c
+++ b/src/core/lib/iomgr/endpoint_pair_windows.c
@@ -82,15 +82,16 @@ static void create_sockets(SOCKET sv[2]) {
   sv[0] = svr_sock;
 }
 
-grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
-                                                   size_t read_slice_size) {
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(
+    const char *name, grpc_resource_quota *resource_quota,
+    size_t read_slice_size) {
   SOCKET sv[2];
   grpc_endpoint_pair p;
   create_sockets(sv);
   p.client = grpc_tcp_create(grpc_winsocket_create(sv[1], "endpoint:client"),
-                             "endpoint:server");
+                             resource_quota, "endpoint:server");
   p.server = grpc_tcp_create(grpc_winsocket_create(sv[0], "endpoint:server"),
-                             "endpoint:client");
+                             resource_quota, "endpoint:client");
   return p;
 }
 
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index db51ec4939..1b15e0eb4f 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -69,9 +69,17 @@ static int grpc_polling_trace = 0; /* Disabled by default */
     gpr_log(GPR_INFO, (fmt), __VA_ARGS__); \
   }
 
+/* Uncomment the following enable extra checks on poll_object operations */
+/* #define PO_DEBUG */
+
 static int grpc_wakeup_signal = -1;
 static bool is_grpc_wakeup_signal_initialized = false;
 
+/* TODO: sreek: Right now, this wakes up all pollers. In future we should make
+ * sure to wake up one polling thread (which can wake up other threads if
+ * needed) */
+static grpc_wakeup_fd global_wakeup_fd;
+
 /* Implements the function defined in grpc_posix.h. This function might be
  * called before even calling grpc_init() to set either a different signal to
  * use. If signum == -1, then the use of signals is disabled */
@@ -90,10 +98,42 @@ void grpc_use_signal(int signum) {
 
 struct polling_island;
 
+typedef enum {
+  POLL_OBJ_FD,
+  POLL_OBJ_POLLSET,
+  POLL_OBJ_POLLSET_SET
+} poll_obj_type;
+
+typedef struct poll_obj {
+#ifdef PO_DEBUG
+  poll_obj_type obj_type;
+#endif
+  gpr_mu mu;
+  struct polling_island *pi;
+} poll_obj;
+
+const char *poll_obj_string(poll_obj_type po_type) {
+  switch (po_type) {
+    case POLL_OBJ_FD:
+      return "fd";
+    case POLL_OBJ_POLLSET:
+      return "pollset";
+    case POLL_OBJ_POLLSET_SET:
+      return "pollset_set";
+  }
+
+  GPR_UNREACHABLE_CODE(return "UNKNOWN");
+}
+
 /*******************************************************************************
  * Fd Declarations
  */
+
+#define FD_FROM_PO(po) ((grpc_fd *)(po))
+
 struct grpc_fd {
+  poll_obj po;
+
   int fd;
   /* refst format:
        bit 0    : 1=Active / 0=Orphaned
@@ -101,8 +141,6 @@ struct grpc_fd {
      Ref/Unref by two to avoid altering the orphaned bit */
   gpr_atm refst;
 
-  gpr_mu mu;
-
   /* Indicates that the fd is shutdown and that any pending read/write closures
      should fail */
   bool shutdown;
@@ -115,9 +153,6 @@ struct grpc_fd {
   grpc_closure *read_closure;
   grpc_closure *write_closure;
 
-  /* The polling island to which this fd belongs to (protected by mu) */
-  struct polling_island *polling_island;
-
   struct grpc_fd *freelist_next;
   grpc_closure *on_done_closure;
 
@@ -163,7 +198,7 @@ static void fd_global_shutdown(void);
 #define PI_ADD_REF(p, r) pi_add_ref((p))
 #define PI_UNREF(exec_ctx, p, r) pi_unref((exec_ctx), (p))
 
-#endif /* !defined(GPRC_PI_REF_COUNT_DEBUG) */
+#endif /* !defined(GRPC_PI_REF_COUNT_DEBUG) */
 
 /* This is also used as grpc_workqueue (by directly casing it) */
 typedef struct polling_island {
@@ -220,41 +255,21 @@ struct grpc_pollset_worker {
 };
 
 struct grpc_pollset {
-  gpr_mu mu;
+  poll_obj po;
+
   grpc_pollset_worker root_worker;
   bool kicked_without_pollers;
 
   bool shutting_down;          /* Is the pollset shutting down ? */
   bool finish_shutdown_called; /* Is the 'finish_shutdown_locked()' called ? */
   grpc_closure *shutdown_done; /* Called after after shutdown is complete */
-
-  /* The polling island to which this pollset belongs to */
-  struct polling_island *polling_island;
 };
 
 /*******************************************************************************
  * Pollset-set Declarations
  */
-/* TODO: sreek - Change the pollset_set implementation such that a pollset_set
- * directly points to a polling_island (and adding an fd/pollset/pollset_set to
- * the current pollset_set would result in polling island merges. This would
- * remove the need to maintain fd_count here. This will also significantly
- * simplify the grpc_fd structure since we would no longer need to explicitly
- * maintain the orphaned state */
 struct grpc_pollset_set {
-  gpr_mu mu;
-
-  size_t pollset_count;
-  size_t pollset_capacity;
-  grpc_pollset **pollsets;
-
-  size_t pollset_set_count;
-  size_t pollset_set_capacity;
-  struct grpc_pollset_set **pollset_sets;
-
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
+  poll_obj po;
 };
 
 /*******************************************************************************
@@ -437,9 +452,8 @@ static void polling_island_add_wakeup_fd_locked(polling_island *pi,
     gpr_asprintf(&err_msg,
                  "epoll_ctl (epoll_fd: %d) add wakeup fd: %d failed with "
                  "error: %d (%s)",
-                 pi->epoll_fd,
-                 GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), errno,
-                 strerror(errno));
+                 pi->epoll_fd, GRPC_WAKEUP_FD_GET_READ_FD(&global_wakeup_fd),
+                 errno, strerror(errno));
     append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
     gpr_free(err_msg);
   }
@@ -541,7 +555,7 @@ static polling_island *polling_island_create(grpc_exec_ctx *exec_ctx,
     goto done;
   }
 
-  polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd, error);
+  polling_island_add_wakeup_fd_locked(pi, &global_wakeup_fd, error);
   polling_island_add_wakeup_fd_locked(pi, &pi->workqueue_wakeup_fd, error);
 
   if (initial_fd != NULL) {
@@ -843,11 +857,6 @@ static void polling_island_global_shutdown() {
  * alarm 'epoch'). This wakeup_fd gives us something to alert on when such a
  * case occurs. */
 
-/* TODO: sreek: Right now, this wakes up all pollers. In future we should make
- * sure to wake up one polling thread (which can wake up other threads if
- * needed) */
-grpc_wakeup_fd grpc_global_wakeup_fd;
-
 static grpc_fd *fd_freelist = NULL;
 static gpr_mu fd_freelist_mu;
 
@@ -916,7 +925,7 @@ static void fd_global_shutdown(void) {
   while (fd_freelist != NULL) {
     grpc_fd *fd = fd_freelist;
     fd_freelist = fd_freelist->freelist_next;
-    gpr_mu_destroy(&fd->mu);
+    gpr_mu_destroy(&fd->po.mu);
     gpr_free(fd);
   }
   gpr_mu_destroy(&fd_freelist_mu);
@@ -934,13 +943,17 @@ static grpc_fd *fd_create(int fd, const char *name) {
 
   if (new_fd == NULL) {
     new_fd = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&new_fd->mu);
+    gpr_mu_init(&new_fd->po.mu);
   }
 
-  /* Note: It is not really needed to get the new_fd->mu lock here. If this is a
-     newly created fd (or an fd we got from the freelist), no one else would be
-     holding a lock to it anyway. */
-  gpr_mu_lock(&new_fd->mu);
+  /* Note: It is not really needed to get the new_fd->po.mu lock here. If this
+   * is a newly created fd (or an fd we got from the freelist), no one else
+   * would be holding a lock to it anyway. */
+  gpr_mu_lock(&new_fd->po.mu);
+  new_fd->po.pi = NULL;
+#ifdef PO_DEBUG
+  new_fd->po.obj_type = POLL_OBJ_FD;
+#endif
 
   gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1);
   new_fd->fd = fd;
@@ -948,12 +961,11 @@ static grpc_fd *fd_create(int fd, const char *name) {
   new_fd->orphaned = false;
   new_fd->read_closure = CLOSURE_NOT_READY;
   new_fd->write_closure = CLOSURE_NOT_READY;
-  new_fd->polling_island = NULL;
   new_fd->freelist_next = NULL;
   new_fd->on_done_closure = NULL;
   new_fd->read_notifier_pollset = NULL;
 
-  gpr_mu_unlock(&new_fd->mu);
+  gpr_mu_unlock(&new_fd->po.mu);
 
   char *fd_name;
   gpr_asprintf(&fd_name, "%s fd=%d", name, fd);
@@ -965,17 +977,13 @@ static grpc_fd *fd_create(int fd, const char *name) {
   return new_fd;
 }
 
-static bool fd_is_orphaned(grpc_fd *fd) {
-  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
-}
-
 static int fd_wrapped_fd(grpc_fd *fd) {
   int ret_fd = -1;
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   if (!fd->orphaned) {
     ret_fd = fd->fd;
   }
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 
   return ret_fd;
 }
@@ -987,7 +995,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   grpc_error *error = GRPC_ERROR_NONE;
   polling_island *unref_pi = NULL;
 
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   fd->on_done_closure = on_done;
 
   /* If release_fd is not NULL, we should be relinquishing control of the file
@@ -1007,25 +1015,25 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
 
   /* Remove the fd from the polling island:
      - Get a lock on the latest polling island (i.e the last island in the
-       linked list pointed by fd->polling_island). This is the island that
+       linked list pointed by fd->po.pi). This is the island that
        would actually contain the fd
      - Remove the fd from the latest polling island
      - Unlock the latest polling island
-     - Set fd->polling_island to NULL (but remove the ref on the polling island
+     - Set fd->po.pi to NULL (but remove the ref on the polling island
        before doing this.) */
-  if (fd->polling_island != NULL) {
-    polling_island *pi_latest = polling_island_lock(fd->polling_island);
+  if (fd->po.pi != NULL) {
+    polling_island *pi_latest = polling_island_lock(fd->po.pi);
     polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed, &error);
     gpr_mu_unlock(&pi_latest->mu);
 
-    unref_pi = fd->polling_island;
-    fd->polling_island = NULL;
+    unref_pi = fd->po.pi;
+    fd->po.pi = NULL;
   }
 
   grpc_exec_ctx_sched(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error),
                       NULL);
 
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
   UNREF_BY(fd, 2, reason); /* Drop the reference */
   if (unref_pi != NULL) {
     /* Unref stale polling island here, outside the fd lock above.
@@ -1090,23 +1098,23 @@ static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
                                                   grpc_fd *fd) {
   grpc_pollset *notifier = NULL;
 
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   notifier = fd->read_notifier_pollset;
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 
   return notifier;
 }
 
 static bool fd_is_shutdown(grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   const bool r = fd->shutdown;
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
   return r;
 }
 
 /* Might be called multiple times */
 static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   /* Do the actual shutdown only once */
   if (!fd->shutdown) {
     fd->shutdown = true;
@@ -1117,28 +1125,28 @@ static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
     set_ready_locked(exec_ctx, fd, &fd->read_closure);
     set_ready_locked(exec_ctx, fd, &fd->write_closure);
   }
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 }
 
 static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                               grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 }
 
 static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                                grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
   notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 }
 
 static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
-  grpc_workqueue *workqueue = GRPC_WORKQUEUE_REF(
-      (grpc_workqueue *)fd->polling_island, "fd_get_workqueue");
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
+  grpc_workqueue *workqueue =
+      GRPC_WORKQUEUE_REF((grpc_workqueue *)fd->po.pi, "fd_get_workqueue");
+  gpr_mu_unlock(&fd->po.mu);
   return workqueue;
 }
 
@@ -1163,11 +1171,11 @@ static grpc_error *pollset_global_init(void) {
   gpr_tls_init(&g_current_thread_pollset);
   gpr_tls_init(&g_current_thread_worker);
   poller_kick_init();
-  return grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  return grpc_wakeup_fd_init(&global_wakeup_fd);
 }
 
 static void pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  grpc_wakeup_fd_destroy(&global_wakeup_fd);
   gpr_tls_destroy(&g_current_thread_pollset);
   gpr_tls_destroy(&g_current_thread_worker);
 }
@@ -1274,12 +1282,16 @@ static grpc_error *pollset_kick(grpc_pollset *p,
 }
 
 static grpc_error *kick_poller(void) {
-  return grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd);
+  return grpc_wakeup_fd_wakeup(&global_wakeup_fd);
 }
 
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
+  gpr_mu_init(&pollset->po.mu);
+  *mu = &pollset->po.mu;
+  pollset->po.pi = NULL;
+#ifdef PO_DEBUG
+  pollset->po.obj_type = POLL_OBJ_POLLSET;
+#endif
 
   pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
   pollset->kicked_without_pollers = false;
@@ -1287,8 +1299,6 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->shutting_down = false;
   pollset->finish_shutdown_called = false;
   pollset->shutdown_done = NULL;
-
-  pollset->polling_island = NULL;
 }
 
 /* Convert a timespec to milliseconds:
@@ -1318,26 +1328,26 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
 
 static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                                grpc_pollset *notifier) {
-  /* Need the fd->mu since we might be racing with fd_notify_on_read */
-  gpr_mu_lock(&fd->mu);
+  /* Need the fd->po.mu since we might be racing with fd_notify_on_read */
+  gpr_mu_lock(&fd->po.mu);
   set_ready_locked(exec_ctx, fd, &fd->read_closure);
   fd->read_notifier_pollset = notifier;
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 }
 
 static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  /* Need the fd->mu since we might be racing with fd_notify_on_write */
-  gpr_mu_lock(&fd->mu);
+  /* Need the fd->po.mu since we might be racing with fd_notify_on_write */
+  gpr_mu_lock(&fd->po.mu);
   set_ready_locked(exec_ctx, fd, &fd->write_closure);
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_unlock(&fd->po.mu);
 }
 
 static void pollset_release_polling_island(grpc_exec_ctx *exec_ctx,
                                            grpc_pollset *ps, char *reason) {
-  if (ps->polling_island != NULL) {
-    PI_UNREF(exec_ctx, ps->polling_island, reason);
+  if (ps->po.pi != NULL) {
+    PI_UNREF(exec_ctx, ps->po.pi, reason);
   }
-  ps->polling_island = NULL;
+  ps->po.pi = NULL;
 }
 
 static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
@@ -1347,12 +1357,12 @@ static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
 
   pollset->finish_shutdown_called = true;
 
-  /* Release the ref and set pollset->polling_island to NULL */
+  /* Release the ref and set pollset->po.pi to NULL */
   pollset_release_polling_island(exec_ctx, pollset, "ps_shutdown");
   grpc_exec_ctx_sched(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE, NULL);
 }
 
-/* pollset->mu lock must be held by the caller before calling this */
+/* pollset->po.mu lock must be held by the caller before calling this */
 static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                              grpc_closure *closure) {
   GPR_TIMER_BEGIN("pollset_shutdown", 0);
@@ -1377,7 +1387,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
  * here */
 static void pollset_destroy(grpc_pollset *pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
-  gpr_mu_destroy(&pollset->mu);
+  gpr_mu_destroy(&pollset->po.mu);
 }
 
 static void pollset_reset(grpc_pollset *pollset) {
@@ -1387,7 +1397,7 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset->finish_shutdown_called = false;
   pollset->kicked_without_pollers = false;
   pollset->shutdown_done = NULL;
-  GPR_ASSERT(pollset->polling_island == NULL);
+  GPR_ASSERT(pollset->po.pi == NULL);
 }
 
 static bool maybe_do_workqueue_work(grpc_exec_ctx *exec_ctx,
@@ -1427,7 +1437,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
-     latest polling island pointed by pollset->polling_island.
+     latest polling island pointed by pollset->po.pi
 
      Since epoll_fd is immutable, we can read it without obtaining the polling
      island lock. There is however a possibility that the polling island (from
@@ -1436,36 +1446,36 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      right-away from epoll_wait() and pick up the latest polling_island the next
      this function (i.e pollset_work_and_unlock()) is called */
 
-  if (pollset->polling_island == NULL) {
-    pollset->polling_island = polling_island_create(exec_ctx, NULL, error);
-    if (pollset->polling_island == NULL) {
+  if (pollset->po.pi == NULL) {
+    pollset->po.pi = polling_island_create(exec_ctx, NULL, error);
+    if (pollset->po.pi == NULL) {
       GPR_TIMER_END("pollset_work_and_unlock", 0);
       return; /* Fatal error. We cannot continue */
     }
 
-    PI_ADD_REF(pollset->polling_island, "ps");
+    PI_ADD_REF(pollset->po.pi, "ps");
     GRPC_POLLING_TRACE("pollset_work: pollset: %p created new pi: %p",
-                       (void *)pollset, (void *)pollset->polling_island);
+                       (void *)pollset, (void *)pollset->po.pi);
   }
 
-  pi = polling_island_maybe_get_latest(pollset->polling_island);
+  pi = polling_island_maybe_get_latest(pollset->po.pi);
   epoll_fd = pi->epoll_fd;
 
-  /* Update the pollset->polling_island since the island being pointed by
-     pollset->polling_island maybe older than the one pointed by pi) */
-  if (pollset->polling_island != pi) {
+  /* Update the pollset->po.pi since the island being pointed by
+     pollset->po.pi maybe older than the one pointed by pi) */
+  if (pollset->po.pi != pi) {
     /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
        polling island to be deleted */
     PI_ADD_REF(pi, "ps");
-    PI_UNREF(exec_ctx, pollset->polling_island, "ps");
-    pollset->polling_island = pi;
+    PI_UNREF(exec_ctx, pollset->po.pi, "ps");
+    pollset->po.pi = pi;
   }
 
   /* Add an extra ref so that the island does not get destroyed (which means
      the epoll_fd won't be closed) while we are are doing an epoll_wait() on the
      epoll_fd */
   PI_ADD_REF(pi, "ps_work");
-  gpr_mu_unlock(&pollset->mu);
+  gpr_mu_unlock(&pollset->po.mu);
 
   /* If we get some workqueue work to do, it might end up completing an item on
      the completion queue, so there's no need to poll... so we skip that and
@@ -1501,13 +1511,11 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
 
     for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;
-      if (data_ptr == &grpc_global_wakeup_fd) {
-        append_error(error,
-                     grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd),
+      if (data_ptr == &global_wakeup_fd) {
+        append_error(error, grpc_wakeup_fd_consume_wakeup(&global_wakeup_fd),
                      err_desc);
       } else if (data_ptr == &pi->workqueue_wakeup_fd) {
-        append_error(error,
-                     grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd),
+        append_error(error, grpc_wakeup_fd_consume_wakeup(&global_wakeup_fd),
                      err_desc);
         maybe_do_workqueue_work(exec_ctx, pi);
       } else if (data_ptr == &polling_island_wakeup_fd) {
@@ -1540,17 +1548,17 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(pi != NULL);
 
   /* Before leaving, release the extra ref we added to the polling island. It
-     is important to use "pi" here (i.e our old copy of pollset->polling_island
+     is important to use "pi" here (i.e our old copy of pollset->po.pi
      that we got before releasing the polling island lock). This is because
-     pollset->polling_island pointer might get udpated in other parts of the
+     pollset->po.pi pointer might get udpated in other parts of the
      code when there is an island merge while we are doing epoll_wait() above */
   PI_UNREF(exec_ctx, pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 
-/* pollset->mu lock must be held by the caller before calling this.
-   The function pollset_work() may temporarily release the lock (pollset->mu)
+/* pollset->po.mu lock must be held by the caller before calling this.
+   The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
 static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
@@ -1620,7 +1628,7 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                             &g_orig_sigmask, &error);
     grpc_exec_ctx_flush(exec_ctx);
 
-    gpr_mu_lock(&pollset->mu);
+    gpr_mu_lock(&pollset->po.mu);
 
     /* Note: There is no need to reset worker.is_kicked to 0 since we are no
        longer going to use this worker */
@@ -1640,9 +1648,9 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0);
     finish_shutdown_locked(exec_ctx, pollset);
 
-    gpr_mu_unlock(&pollset->mu);
+    gpr_mu_unlock(&pollset->po.mu);
     grpc_exec_ctx_flush(exec_ctx);
-    gpr_mu_lock(&pollset->mu);
+    gpr_mu_lock(&pollset->po.mu);
   }
 
   *worker_hdl = NULL;
@@ -1656,130 +1664,160 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   return error;
 }
 
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  GPR_TIMER_BEGIN("pollset_add_fd", 0);
+static void add_poll_object(grpc_exec_ctx *exec_ctx, poll_obj *bag,
+                            poll_obj_type bag_type, poll_obj *item,
+                            poll_obj_type item_type) {
+  GPR_TIMER_BEGIN("add_poll_object", 0);
 
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  gpr_mu_lock(&pollset->mu);
-  gpr_mu_lock(&fd->mu);
+#ifdef PO_DEBUG
+  GPR_ASSERT(item->obj_type == item_type);
+  GPR_ASSERT(bag->obj_type == bag_type);
+#endif
 
+  grpc_error *error = GRPC_ERROR_NONE;
   polling_island *pi_new = NULL;
 
+  gpr_mu_lock(&bag->mu);
+  gpr_mu_lock(&item->mu);
+
 retry:
-  /* 1) If fd->polling_island and pollset->polling_island are both non-NULL and
-   *    equal, do nothing.
-   * 2) If fd->polling_island and pollset->polling_island are both NULL, create
-   *    a new polling island (with a refcount of 2) and make the polling_island
-   *    fields in both fd and pollset to point to the new island
-   * 3) If one of fd->polling_island or pollset->polling_island is NULL, update
-   *    the NULL polling_island field to point to the non-NULL polling_island
-   *    field (ensure that the refcount on the polling island is incremented by
-   *    1 to account for the newly added reference)
-   * 4) Finally, if fd->polling_island and pollset->polling_island are non-NULL
-   *    and different, merge both the polling islands and update the
-   *    polling_island fields in both fd and pollset to point to the merged
-   *    polling island.
+  /*
+   * 1) If item->pi and bag->pi are both non-NULL and equal, do nothing
+   * 2) If item->pi and bag->pi are both NULL, create a new polling island (with
+   *    a refcount of 2) and point item->pi and bag->pi to the new island
+   * 3) If exactly one of item->pi or bag->pi is NULL, update it to point to
+   *    the other's non-NULL pi
+   * 4) Finally if item->pi and bag-pi are non-NULL and not-equal, merge the
+   *    polling islands and update item->pi and bag->pi to point to the new
+   *    island
    */
 
-  if (fd->orphaned) {
-    gpr_mu_unlock(&fd->mu);
-    gpr_mu_unlock(&pollset->mu);
-    /* early out */
+  /* Early out if we are trying to add an 'fd' to a 'bag' but the fd is already
+   * orphaned */
+  if (item_type == POLL_OBJ_FD && (FD_FROM_PO(item))->orphaned) {
+    gpr_mu_unlock(&item->mu);
+    gpr_mu_unlock(&bag->mu);
     return;
   }
 
-  if (fd->polling_island == pollset->polling_island) {
-    pi_new = fd->polling_island;
+  if (item->pi == bag->pi) {
+    pi_new = item->pi;
     if (pi_new == NULL) {
-      /* Unlock before creating a new polling island: the polling island will
-         create a workqueue which creates a file descriptor, and holding an fd
-         lock here can eventually cause a loop to appear to TSAN (making it
-         unhappy). We don't think it's a real loop (there's an epoch point where
-         that loop possibility disappears), but the advantages of keeping TSAN
-         happy outweigh any performance advantage we might have by keeping the
-         lock held. */
-      gpr_mu_unlock(&fd->mu);
-      pi_new = polling_island_create(exec_ctx, fd, &error);
-      gpr_mu_lock(&fd->mu);
-      /* Need to reverify any assumptions made between the initial lock and
-         getting to this branch: if they've changed, we need to throw away our
-         work and figure things out again. */
-      if (fd->polling_island != NULL) {
-        GRPC_POLLING_TRACE(
-            "pollset_add_fd: Raced creating new polling island. pi_new: %p "
-            "(fd: %d, pollset: %p)",
-            (void *)pi_new, fd->fd, (void *)pollset);
-
-        /* No need to lock 'pi_new' here since this is a new polling island and
-         * no one has a reference to it yet */
-        polling_island_remove_all_fds_locked(pi_new, true, &error);
-
-        /* Ref and unref so that the polling island gets deleted during unref */
-        PI_ADD_REF(pi_new, "dance_of_destruction");
-        PI_UNREF(exec_ctx, pi_new, "dance_of_destruction");
-        goto retry;
+      /* GPR_ASSERT(item->pi == bag->pi == NULL) */
+
+      /* If we are adding an fd to a bag (i.e pollset or pollset_set), then
+       * we need to do some extra work to make TSAN happy */
+      if (item_type == POLL_OBJ_FD) {
+        /* Unlock before creating a new polling island: the polling island will
+           create a workqueue which creates a file descriptor, and holding an fd
+           lock here can eventually cause a loop to appear to TSAN (making it
+           unhappy). We don't think it's a real loop (there's an epoch point
+           where that loop possibility disappears), but the advantages of
+           keeping TSAN happy outweigh any performance advantage we might have
+           by keeping the lock held. */
+        gpr_mu_unlock(&item->mu);
+        pi_new = polling_island_create(exec_ctx, FD_FROM_PO(item), &error);
+        gpr_mu_lock(&item->mu);
+
+        /* Need to reverify any assumptions made between the initial lock and
+           getting to this branch: if they've changed, we need to throw away our
+           work and figure things out again. */
+        if (item->pi != NULL) {
+          GRPC_POLLING_TRACE(
+              "add_poll_object: Raced creating new polling island. pi_new: %p "
+              "(fd: %d, %s: %p)",
+              (void *)pi_new, FD_FROM_PO(item)->fd, poll_obj_string(bag_type),
+              (void *)bag);
+          /* No need to lock 'pi_new' here since this is a new polling island
+            * and no one has a reference to it yet */
+          polling_island_remove_all_fds_locked(pi_new, true, &error);
+
+          /* Ref and unref so that the polling island gets deleted during unref
+           */
+          PI_ADD_REF(pi_new, "dance_of_destruction");
+          PI_UNREF(exec_ctx, pi_new, "dance_of_destruction");
+          goto retry;
+        }
       } else {
-        GRPC_POLLING_TRACE(
-            "pollset_add_fd: Created new polling island. pi_new: %p (fd: %d, "
-            "pollset: %p)",
-            (void *)pi_new, fd->fd, (void *)pollset);
+        pi_new = polling_island_create(exec_ctx, NULL, &error);
       }
+
+      GRPC_POLLING_TRACE(
+          "add_poll_object: Created new polling island. pi_new: %p (%s: %p, "
+          "%s: %p)",
+          (void *)pi_new, poll_obj_string(item_type), (void *)item,
+          poll_obj_string(bag_type), (void *)bag);
+    } else {
+      GRPC_POLLING_TRACE(
+          "add_poll_object: Same polling island. pi: %p (%s, %s)",
+          (void *)pi_new, poll_obj_string(item_type),
+          poll_obj_string(bag_type));
+    }
+  } else if (item->pi == NULL) {
+    /* GPR_ASSERT(bag->pi != NULL) */
+    /* Make pi_new point to latest pi*/
+    pi_new = polling_island_lock(bag->pi);
+
+    if (item_type == POLL_OBJ_FD) {
+      grpc_fd *fd = FD_FROM_PO(item);
+      polling_island_add_fds_locked(pi_new, &fd, 1, true, &error);
     }
-  } else if (fd->polling_island == NULL) {
-    pi_new = polling_island_lock(pollset->polling_island);
-    polling_island_add_fds_locked(pi_new, &fd, 1, true, &error);
-    gpr_mu_unlock(&pi_new->mu);
 
+    gpr_mu_unlock(&pi_new->mu);
     GRPC_POLLING_TRACE(
-        "pollset_add_fd: fd->pi was NULL. pi_new: %p (fd: %d, pollset: %p, "
-        "pollset->pi: %p)",
-        (void *)pi_new, fd->fd, (void *)pollset,
-        (void *)pollset->polling_island);
-  } else if (pollset->polling_island == NULL) {
-    pi_new = polling_island_lock(fd->polling_island);
+        "add_poll_obj: item->pi was NULL. pi_new: %p (item(%s): %p, "
+        "bag(%s): %p)",
+        (void *)pi_new, poll_obj_string(item_type), (void *)item,
+        poll_obj_string(bag_type), (void *)bag);
+  } else if (bag->pi == NULL) {
+    /* GPR_ASSERT(item->pi != NULL) */
+    /* Make pi_new to point to latest pi */
+    pi_new = polling_island_lock(item->pi);
     gpr_mu_unlock(&pi_new->mu);
-
     GRPC_POLLING_TRACE(
-        "pollset_add_fd: pollset->pi was NULL. pi_new: %p (fd: %d, pollset: "
-        "%p, fd->pi: %p",
-        (void *)pi_new, fd->fd, (void *)pollset, (void *)fd->polling_island);
+        "add_poll_obj: bag->pi was NULL. pi_new: %p (item(%s): %p, "
+        "bag(%s): %p)",
+        (void *)pi_new, poll_obj_string(item_type), (void *)item,
+        poll_obj_string(bag_type), (void *)bag);
   } else {
-    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island,
-                                  &error);
+    pi_new = polling_island_merge(item->pi, bag->pi, &error);
     GRPC_POLLING_TRACE(
-        "pollset_add_fd: polling islands merged. pi_new: %p (fd: %d, pollset: "
-        "%p, fd->pi: %p, pollset->pi: %p)",
-        (void *)pi_new, fd->fd, (void *)pollset, (void *)fd->polling_island,
-        (void *)pollset->polling_island);
+        "add_poll_obj: polling islands merged. pi_new: %p (item(%s): %p, "
+        "bag(%s): %p)",
+        (void *)pi_new, poll_obj_string(item_type), (void *)item,
+        poll_obj_string(bag_type), (void *)bag);
   }
 
-  /* At this point, pi_new is the polling island that both fd->polling_island
-     and pollset->polling_island must be pointing to */
+  /* At this point, pi_new is the polling island that both item->pi and bag->pi
+     MUST be pointing to */
 
-  if (fd->polling_island != pi_new) {
-    PI_ADD_REF(pi_new, "fd");
-    if (fd->polling_island != NULL) {
-      PI_UNREF(exec_ctx, fd->polling_island, "fd");
+  if (item->pi != pi_new) {
+    PI_ADD_REF(pi_new, poll_obj_string(item_type));
+    if (item->pi != NULL) {
+      PI_UNREF(exec_ctx, item->pi, poll_obj_string(item_type));
     }
-    fd->polling_island = pi_new;
+    item->pi = pi_new;
   }
 
-  if (pollset->polling_island != pi_new) {
-    PI_ADD_REF(pi_new, "ps");
-    if (pollset->polling_island != NULL) {
-      PI_UNREF(exec_ctx, pollset->polling_island, "ps");
+  if (bag->pi != pi_new) {
+    PI_ADD_REF(pi_new, poll_obj_string(bag_type));
+    if (bag->pi != NULL) {
+      PI_UNREF(exec_ctx, bag->pi, poll_obj_string(bag_type));
     }
-    pollset->polling_island = pi_new;
+    bag->pi = pi_new;
   }
 
-  gpr_mu_unlock(&fd->mu);
-  gpr_mu_unlock(&pollset->mu);
+  gpr_mu_unlock(&item->mu);
+  gpr_mu_unlock(&bag->mu);
 
-  GRPC_LOG_IF_ERROR("pollset_add_fd", error);
+  GRPC_LOG_IF_ERROR("add_poll_object", error);
+  GPR_TIMER_END("add_poll_object", 0);
+}
 
-  GPR_TIMER_END("pollset_add_fd", 0);
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  add_poll_object(exec_ctx, &pollset->po, POLL_OBJ_POLLSET, &fd->po,
+                  POLL_OBJ_FD);
 }
 
 /*******************************************************************************
@@ -1787,142 +1825,60 @@ retry:
  */
 
 static grpc_pollset_set *pollset_set_create(void) {
-  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
-  memset(pollset_set, 0, sizeof(*pollset_set));
-  gpr_mu_init(&pollset_set->mu);
-  return pollset_set;
+  grpc_pollset_set *pss = gpr_malloc(sizeof(*pss));
+  gpr_mu_init(&pss->po.mu);
+  pss->po.pi = NULL;
+#ifdef PO_DEBUG
+  pss->po.obj_type = POLL_OBJ_POLLSET_SET;
+#endif
+  return pss;
 }
 
-static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
-  size_t i;
-  gpr_mu_destroy(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+static void pollset_set_destroy(grpc_pollset_set *pss) {
+  gpr_mu_destroy(&pss->po.mu);
+
+  if (pss->po.pi != NULL) {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    PI_UNREF(&exec_ctx, pss->po.pi, "pss_destroy");
+    grpc_exec_ctx_finish(&exec_ctx);
   }
-  gpr_free(pollset_set->pollsets);
-  gpr_free(pollset_set->pollset_sets);
-  gpr_free(pollset_set->fds);
-  gpr_free(pollset_set);
+
+  gpr_free(pss);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->fd_count == pollset_set->fd_capacity) {
-    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
-  }
-  GRPC_FD_REF(fd, "pollset_set");
-  pollset_set->fds[pollset_set->fd_count++] = fd;
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
+                               grpc_fd *fd) {
+  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &fd->po,
+                  POLL_OBJ_FD);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    if (pollset_set->fds[i] == fd) {
-      pollset_set->fd_count--;
-      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
-               pollset_set->fds[pollset_set->fd_count]);
-      GRPC_FD_UNREF(fd, "pollset_set");
-      break;
-    }
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
+static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
+                               grpc_fd *fd) {
+  /* Nothing to do */
 }
 
 static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i, j;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
-    pollset_set->pollset_capacity =
-        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
-    pollset_set->pollsets =
-        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
-                                               sizeof(*pollset_set->pollsets));
-  }
-  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
-  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
-    if (fd_is_orphaned(pollset_set->fds[i])) {
-      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-    } else {
-      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
-      pollset_set->fds[j++] = pollset_set->fds[i];
-    }
-  }
-  pollset_set->fd_count = j;
-  gpr_mu_unlock(&pollset_set->mu);
+                                    grpc_pollset_set *pss, grpc_pollset *ps) {
+  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &ps->po,
+                  POLL_OBJ_POLLSET);
 }
 
 static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    if (pollset_set->pollsets[i] == pollset) {
-      pollset_set->pollset_count--;
-      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
-               pollset_set->pollsets[pollset_set->pollset_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&pollset_set->mu);
+                                    grpc_pollset_set *pss, grpc_pollset *ps) {
+  /* Nothing to do */
 }
 
 static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
                                         grpc_pollset_set *bag,
                                         grpc_pollset_set *item) {
-  size_t i, j;
-  gpr_mu_lock(&bag->mu);
-  if (bag->pollset_set_count == bag->pollset_set_capacity) {
-    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
-    bag->pollset_sets =
-        gpr_realloc(bag->pollset_sets,
-                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
-  }
-  bag->pollset_sets[bag->pollset_set_count++] = item;
-  for (i = 0, j = 0; i < bag->fd_count; i++) {
-    if (fd_is_orphaned(bag->fds[i])) {
-      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
-    } else {
-      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
-      bag->fds[j++] = bag->fds[i];
-    }
-  }
-  bag->fd_count = j;
-  gpr_mu_unlock(&bag->mu);
+  add_poll_object(exec_ctx, &bag->po, POLL_OBJ_POLLSET_SET, &item->po,
+                  POLL_OBJ_POLLSET_SET);
 }
 
 static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
                                         grpc_pollset_set *bag,
                                         grpc_pollset_set *item) {
-  size_t i;
-  gpr_mu_lock(&bag->mu);
-  for (i = 0; i < bag->pollset_set_count; i++) {
-    if (bag->pollset_sets[i] == item) {
-      bag->pollset_set_count--;
-      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
-               bag->pollset_sets[bag->pollset_set_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&bag->mu);
+  /* Nothing to do */
 }
 
 /* Test helper functions
@@ -1930,9 +1886,9 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
 void *grpc_fd_get_polling_island(grpc_fd *fd) {
   polling_island *pi;
 
-  gpr_mu_lock(&fd->mu);
-  pi = fd->polling_island;
-  gpr_mu_unlock(&fd->mu);
+  gpr_mu_lock(&fd->po.mu);
+  pi = fd->po.pi;
+  gpr_mu_unlock(&fd->po.mu);
 
   return pi;
 }
@@ -1940,9 +1896,9 @@ void *grpc_fd_get_polling_island(grpc_fd *fd) {
 void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
   polling_island *pi;
 
-  gpr_mu_lock(&ps->mu);
-  pi = ps->polling_island;
-  gpr_mu_unlock(&ps->mu);
+  gpr_mu_lock(&ps->po.mu);
+  pi = ps->po.pi;
+  gpr_mu_unlock(&ps->po.mu);
 
   return pi;
 }
diff --git a/src/core/lib/iomgr/ev_poll_and_epoll_posix.c b/src/core/lib/iomgr/ev_poll_and_epoll_posix.c
deleted file mode 100644
index bf51404203..0000000000
--- a/src/core/lib/iomgr/ev_poll_and_epoll_posix.c
+++ /dev/null
@@ -1,2076 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/* This file will be removed shortly: it's here to keep refactoring
- * steps simple and auditable.
- * It's the combination of the old files:
- *  - fd_posix.{h,c}
- *  - pollset_posix.{h,c}
- *  - pullset_multipoller_with_{poll,epoll}.{h,c}
- * The new version will be split into:
- *  - ev_poll_posix.{h,c}
- *  - ev_epoll_posix.{h,c}
- */
-
-#include "src/core/lib/iomgr/port.h"
-
-#ifdef GRPC_POSIX_SOCKET
-
-#include "src/core/lib/iomgr/ev_poll_and_epoll_posix.h"
-
-#include <assert.h>
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/tls.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/iomgr_internal.h"
-#include "src/core/lib/iomgr/wakeup_fd_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
-/*******************************************************************************
- * FD declarations
- */
-
-typedef struct grpc_fd_watcher {
-  struct grpc_fd_watcher *next;
-  struct grpc_fd_watcher *prev;
-  grpc_pollset *pollset;
-  grpc_pollset_worker *worker;
-  grpc_fd *fd;
-} grpc_fd_watcher;
-
-struct grpc_fd {
-  int fd;
-  /* refst format:
-     bit0:   1=active/0=orphaned
-     bit1-n: refcount
-     meaning that mostly we ref by two to avoid altering the orphaned bit,
-     and just unref by 1 when we're ready to flag the object as orphaned */
-  gpr_atm refst;
-
-  gpr_mu mu;
-  int shutdown;
-  int closed;
-  int released;
-
-  /* The watcher list.
-
-     The following watcher related fields are protected by watcher_mu.
-
-     An fd_watcher is an ephemeral object created when an fd wants to
-     begin polling, and destroyed after the poll.
-
-     It denotes the fd's interest in whether to read poll or write poll
-     or both or neither on this fd.
-
-     If a watcher is asked to poll for reads or writes, the read_watcher
-     or write_watcher fields are set respectively. A watcher may be asked
-     to poll for both, in which case both fields will be set.
-
-     read_watcher and write_watcher may be NULL if no watcher has been
-     asked to poll for reads or writes.
-
-     If an fd_watcher is not asked to poll for reads or writes, it's added
-     to a linked list of inactive watchers, rooted at inactive_watcher_root.
-     If at a later time there becomes need of a poller to poll, one of
-     the inactive pollers may be kicked out of their poll loops to take
-     that responsibility. */
-  grpc_fd_watcher inactive_watcher_root;
-  grpc_fd_watcher *read_watcher;
-  grpc_fd_watcher *write_watcher;
-
-  grpc_closure *read_closure;
-  grpc_closure *write_closure;
-
-  struct grpc_fd *freelist_next;
-
-  grpc_closure *on_done_closure;
-
-  grpc_iomgr_object iomgr_object;
-
-  /* The pollset that last noticed and notified that the fd is readable */
-  grpc_pollset *read_notifier_pollset;
-};
-
-/* Begin polling on an fd.
-   Registers that the given pollset is interested in this fd - so that if read
-   or writability interest changes, the pollset can be kicked to pick up that
-   new interest.
-   Return value is:
-     (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
-   i.e. a combination of read_mask and write_mask determined by the fd's current
-   interest in said events.
-   Polling strategies that do not need to alter their behavior depending on the
-   fd's current interest (such as epoll) do not need to call this function.
-   MUST NOT be called with a pollset lock taken */
-static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              grpc_pollset_worker *worker, uint32_t read_mask,
-                              uint32_t write_mask, grpc_fd_watcher *rec);
-/* Complete polling previously started with fd_begin_poll
-   MUST NOT be called with a pollset lock taken
-   if got_read or got_write are 1, also does the become_{readable,writable} as
-   appropriate. */
-static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
-                        int got_read, int got_write,
-                        grpc_pollset *read_notifier_pollset);
-
-/* Return 1 if this fd is orphaned, 0 otherwise */
-static bool fd_is_orphaned(grpc_fd *fd);
-
-/* Reference counting for fds */
-/*#define GRPC_FD_REF_COUNT_DEBUG*/
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
-static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                     int line);
-#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__)
-#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__)
-#else
-static void fd_ref(grpc_fd *fd);
-static void fd_unref(grpc_fd *fd);
-#define GRPC_FD_REF(fd, reason) fd_ref(fd)
-#define GRPC_FD_UNREF(fd, reason) fd_unref(fd)
-#endif
-
-static void fd_global_init(void);
-static void fd_global_shutdown(void);
-
-#define CLOSURE_NOT_READY ((grpc_closure *)0)
-#define CLOSURE_READY ((grpc_closure *)1)
-
-/*******************************************************************************
- * pollset declarations
- */
-
-typedef struct grpc_pollset_vtable grpc_pollset_vtable;
-
-typedef struct grpc_cached_wakeup_fd {
-  grpc_wakeup_fd fd;
-  struct grpc_cached_wakeup_fd *next;
-} grpc_cached_wakeup_fd;
-
-struct grpc_pollset_worker {
-  grpc_cached_wakeup_fd *wakeup_fd;
-  int reevaluate_polling_on_wakeup;
-  int kicked_specifically;
-  struct grpc_pollset_worker *next;
-  struct grpc_pollset_worker *prev;
-};
-
-struct grpc_pollset {
-  /* pollsets under posix can mutate representation as fds are added and
-     removed.
-     For example, we may choose a poll() based implementation on linux for
-     few fds, and an epoll() based implementation for many fds */
-  const grpc_pollset_vtable *vtable;
-  gpr_mu mu;
-  grpc_pollset_worker root_worker;
-  int in_flight_cbs;
-  int shutting_down;
-  int called_shutdown;
-  int kicked_without_pollers;
-  grpc_closure *shutdown_done;
-  grpc_closure_list idle_jobs;
-  union {
-    int fd;
-    void *ptr;
-  } data;
-  /* Local cache of eventfds for workers */
-  grpc_cached_wakeup_fd *local_wakeup_cache;
-};
-
-struct grpc_pollset_vtable {
-  void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                 struct grpc_fd *fd, int and_unlock_pollset);
-  grpc_error *(*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx,
-                                       grpc_pollset *pollset,
-                                       grpc_pollset_worker *worker,
-                                       gpr_timespec deadline, gpr_timespec now);
-  void (*finish_shutdown)(grpc_pollset *pollset);
-  void (*destroy)(grpc_pollset *pollset);
-};
-
-/* Add an fd to a pollset */
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           struct grpc_fd *fd);
-
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd);
-
-/* Convert a timespec to milliseconds:
-   - very small or negative poll times are clamped to zero to do a
-     non-blocking poll (which becomes spin polling)
-   - other small values are rounded up to one millisecond
-   - longer than a millisecond polls are rounded up to the next nearest
-     millisecond to avoid spinning
-   - infinite timeouts are converted to -1 */
-static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                           gpr_timespec now);
-
-/* Allow kick to wakeup the currently polling worker */
-#define GRPC_POLLSET_CAN_KICK_SELF 1
-/* Force the wakee to repoll when awoken */
-#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
-/* As per pollset_kick, with an extended set of flags (defined above)
-   -- mostly for fd_posix's use. */
-static grpc_error *pollset_kick_ext(grpc_pollset *p,
-                                    grpc_pollset_worker *specific_worker,
-                                    uint32_t flags) GRPC_MUST_USE_RESULT;
-
-/* turn a pollset into a multipoller: platform specific */
-typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
-                                                 grpc_pollset *pollset,
-                                                 struct grpc_fd **fds,
-                                                 size_t fd_count);
-static platform_become_multipoller_type platform_become_multipoller;
-
-/* Return 1 if the pollset has active threads in pollset_work (pollset must
- * be locked) */
-static int pollset_has_workers(grpc_pollset *pollset);
-
-static void remove_fd_from_all_epoll_sets(int fd);
-
-/*******************************************************************************
- * pollset_set definitions
- */
-
-struct grpc_pollset_set {
-  gpr_mu mu;
-
-  size_t pollset_count;
-  size_t pollset_capacity;
-  grpc_pollset **pollsets;
-
-  size_t pollset_set_count;
-  size_t pollset_set_capacity;
-  struct grpc_pollset_set **pollset_sets;
-
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-};
-
-/*******************************************************************************
- * fd_posix.c
- */
-
-/* We need to keep a freelist not because of any concerns of malloc performance
- * but instead so that implementations with multiple threads in (for example)
- * epoll_wait deal with the race between pollset removal and incoming poll
- * notifications.
- *
- * The problem is that the poller ultimately holds a reference to this
- * object, so it is very difficult to know when is safe to free it, at least
- * without some expensive synchronization.
- *
- * If we keep the object freelisted, in the worst case losing this race just
- * becomes a spurious read notification on a reused fd.
- */
-/* TODO(klempner): We could use some form of polling generation count to know
- * when these are safe to free. */
-/* TODO(klempner): Consider disabling freelisting if we don't have multiple
- * threads in poll on the same fd */
-/* TODO(klempner): Batch these allocations to reduce fragmentation */
-static grpc_fd *fd_freelist = NULL;
-static gpr_mu fd_freelist_mu;
-
-static void freelist_fd(grpc_fd *fd) {
-  gpr_mu_lock(&fd_freelist_mu);
-  fd->freelist_next = fd_freelist;
-  fd_freelist = fd;
-  grpc_iomgr_unregister_object(&fd->iomgr_object);
-  gpr_mu_unlock(&fd_freelist_mu);
-}
-
-static grpc_fd *alloc_fd(int fd) {
-  grpc_fd *r = NULL;
-  gpr_mu_lock(&fd_freelist_mu);
-  if (fd_freelist != NULL) {
-    r = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-  }
-  gpr_mu_unlock(&fd_freelist_mu);
-  if (r == NULL) {
-    r = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&r->mu);
-  }
-
-  gpr_mu_lock(&r->mu);
-  gpr_atm_rel_store(&r->refst, 1);
-  r->shutdown = 0;
-  r->read_closure = CLOSURE_NOT_READY;
-  r->write_closure = CLOSURE_NOT_READY;
-  r->fd = fd;
-  r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
-      &r->inactive_watcher_root;
-  r->freelist_next = NULL;
-  r->read_watcher = r->write_watcher = NULL;
-  r->on_done_closure = NULL;
-  r->closed = 0;
-  r->released = 0;
-  r->read_notifier_pollset = NULL;
-  gpr_mu_unlock(&r->mu);
-  return r;
-}
-
-static void destroy(grpc_fd *fd) {
-  gpr_mu_destroy(&fd->mu);
-  gpr_free(fd);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
-static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                   int line) {
-  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
-#else
-#define REF_BY(fd, n, reason) ref_by(fd, n)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n)
-static void ref_by(grpc_fd *fd, int n) {
-#endif
-  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                     int line) {
-  gpr_atm old;
-  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
-#else
-static void unref_by(grpc_fd *fd, int n) {
-  gpr_atm old;
-#endif
-  old = gpr_atm_full_fetch_add(&fd->refst, -n);
-  if (old == n) {
-    freelist_fd(fd);
-  } else {
-    GPR_ASSERT(old > n);
-  }
-}
-
-static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
-
-static void fd_global_shutdown(void) {
-  gpr_mu_lock(&fd_freelist_mu);
-  gpr_mu_unlock(&fd_freelist_mu);
-  while (fd_freelist != NULL) {
-    grpc_fd *fd = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-    destroy(fd);
-  }
-  gpr_mu_destroy(&fd_freelist_mu);
-}
-
-static grpc_fd *fd_create(int fd, const char *name) {
-  grpc_fd *r = alloc_fd(fd);
-  char *name2;
-  gpr_asprintf(&name2, "%s fd=%d", name, fd);
-  grpc_iomgr_register_object(&r->iomgr_object, name2);
-  gpr_free(name2);
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
-#endif
-  return r;
-}
-
-static bool fd_is_orphaned(grpc_fd *fd) {
-  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
-}
-
-static grpc_error *pollset_kick_locked(grpc_fd_watcher *watcher) {
-  gpr_mu_lock(&watcher->pollset->mu);
-  GPR_ASSERT(watcher->worker);
-  grpc_error *err = pollset_kick_ext(watcher->pollset, watcher->worker,
-                                     GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
-  gpr_mu_unlock(&watcher->pollset->mu);
-  return err;
-}
-
-static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
-  if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(fd->inactive_watcher_root.next);
-  } else if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  } else if (fd->write_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static void wake_all_watchers_locked(grpc_fd *fd) {
-  grpc_fd_watcher *watcher;
-  for (watcher = fd->inactive_watcher_root.next;
-       watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(watcher);
-  }
-  if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  }
-  if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static int has_watchers(grpc_fd *fd) {
-  return fd->read_watcher != NULL || fd->write_watcher != NULL ||
-         fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
-}
-
-static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  fd->closed = 1;
-  if (!fd->released) {
-    close(fd->fd);
-  } else {
-    remove_fd_from_all_epoll_sets(fd->fd);
-  }
-  grpc_exec_ctx_sched(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE, NULL);
-}
-
-static int fd_wrapped_fd(grpc_fd *fd) {
-  if (fd->released || fd->closed) {
-    return -1;
-  } else {
-    return fd->fd;
-  }
-}
-
-static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                      grpc_closure *on_done, int *release_fd,
-                      const char *reason) {
-  fd->on_done_closure = on_done;
-  fd->released = release_fd != NULL;
-  if (!fd->released) {
-    shutdown(fd->fd, SHUT_RDWR);
-  } else {
-    *release_fd = fd->fd;
-  }
-  gpr_mu_lock(&fd->mu);
-  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
-  if (!has_watchers(fd)) {
-    close_fd_locked(exec_ctx, fd);
-  } else {
-    wake_all_watchers_locked(fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-  UNREF_BY(fd, 2, reason); /* drop the reference */
-}
-
-/* increment refcount by two to avoid changing the orphan bit */
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
-                   int line) {
-  ref_by(fd, 2, reason, file, line);
-}
-
-static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                     int line) {
-  unref_by(fd, 2, reason, file, line);
-}
-#else
-static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
-
-static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
-#endif
-
-static grpc_error *fd_shutdown_error(bool shutdown) {
-  if (!shutdown) {
-    return GRPC_ERROR_NONE;
-  } else {
-    return GRPC_ERROR_CREATE("FD shutdown");
-  }
-}
-
-static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             grpc_closure **st, grpc_closure *closure) {
-  if (fd->shutdown) {
-    grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_CREATE("FD shutdown"),
-                        NULL);
-  } else if (*st == CLOSURE_NOT_READY) {
-    /* not ready ==> switch to a waiting state by setting the closure */
-    *st = closure;
-  } else if (*st == CLOSURE_READY) {
-    /* already ready ==> queue the closure to run immediately */
-    *st = CLOSURE_NOT_READY;
-    grpc_exec_ctx_sched(exec_ctx, closure, fd_shutdown_error(fd->shutdown),
-                        NULL);
-    maybe_wake_one_watcher_locked(fd);
-  } else {
-    /* upcallptr was set to a different closure.  This is an error! */
-    gpr_log(GPR_ERROR,
-            "User called a notify_on function with a previous callback still "
-            "pending");
-    abort();
-  }
-}
-
-/* returns 1 if state becomes not ready */
-static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                            grpc_closure **st) {
-  if (*st == CLOSURE_READY) {
-    /* duplicate ready ==> ignore */
-    return 0;
-  } else if (*st == CLOSURE_NOT_READY) {
-    /* not ready, and not waiting ==> flag ready */
-    *st = CLOSURE_READY;
-    return 0;
-  } else {
-    /* waiting ==> queue closure */
-    grpc_exec_ctx_sched(exec_ctx, *st, fd_shutdown_error(fd->shutdown), NULL);
-    *st = CLOSURE_NOT_READY;
-    return 1;
-  }
-}
-
-static void set_read_notifier_pollset_locked(
-    grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_pollset *read_notifier_pollset) {
-  fd->read_notifier_pollset = read_notifier_pollset;
-}
-
-static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
-  /* only shutdown once */
-  if (!fd->shutdown) {
-    fd->shutdown = 1;
-    /* signal read/write closed to OS so that future operations fail */
-    shutdown(fd->fd, SHUT_RDWR);
-    set_ready_locked(exec_ctx, fd, &fd->read_closure);
-    set_ready_locked(exec_ctx, fd, &fd->write_closure);
-  }
-  gpr_mu_unlock(&fd->mu);
-}
-
-static bool fd_is_shutdown(grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
-  bool r = fd->shutdown;
-  gpr_mu_unlock(&fd->mu);
-  return r;
-}
-
-static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                              grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                               grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-/* Return the read-notifier pollset */
-static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
-                                                  grpc_fd *fd) {
-  grpc_pollset *notifier = NULL;
-
-  gpr_mu_lock(&fd->mu);
-  notifier = fd->read_notifier_pollset;
-  gpr_mu_unlock(&fd->mu);
-
-  return notifier;
-}
-
-static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              grpc_pollset_worker *worker, uint32_t read_mask,
-                              uint32_t write_mask, grpc_fd_watcher *watcher) {
-  uint32_t mask = 0;
-  grpc_closure *cur;
-  int requested;
-  /* keep track of pollers that have requested our events, in case they change
-   */
-  GRPC_FD_REF(fd, "poll");
-
-  gpr_mu_lock(&fd->mu);
-
-  /* if we are shutdown, then don't add to the watcher set */
-  if (fd->shutdown) {
-    watcher->fd = NULL;
-    watcher->pollset = NULL;
-    watcher->worker = NULL;
-    gpr_mu_unlock(&fd->mu);
-    GRPC_FD_UNREF(fd, "poll");
-    return 0;
-  }
-
-  /* if there is nobody polling for read, but we need to, then start doing so */
-  cur = fd->read_closure;
-  requested = cur != CLOSURE_READY;
-  if (read_mask && fd->read_watcher == NULL && requested) {
-    fd->read_watcher = watcher;
-    mask |= read_mask;
-  }
-  /* if there is nobody polling for write, but we need to, then start doing so
-   */
-  cur = fd->write_closure;
-  requested = cur != CLOSURE_READY;
-  if (write_mask && fd->write_watcher == NULL && requested) {
-    fd->write_watcher = watcher;
-    mask |= write_mask;
-  }
-  /* if not polling, remember this watcher in case we need someone to later */
-  if (mask == 0 && worker != NULL) {
-    watcher->next = &fd->inactive_watcher_root;
-    watcher->prev = watcher->next->prev;
-    watcher->next->prev = watcher->prev->next = watcher;
-  }
-  watcher->pollset = pollset;
-  watcher->worker = worker;
-  watcher->fd = fd;
-  gpr_mu_unlock(&fd->mu);
-
-  return mask;
-}
-
-static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
-                        int got_read, int got_write,
-                        grpc_pollset *read_notifier_pollset) {
-  int was_polling = 0;
-  int kick = 0;
-  grpc_fd *fd = watcher->fd;
-
-  if (fd == NULL) {
-    return;
-  }
-
-  gpr_mu_lock(&fd->mu);
-
-  if (watcher == fd->read_watcher) {
-    /* remove read watcher, kick if we still need a read */
-    was_polling = 1;
-    if (!got_read) {
-      kick = 1;
-    }
-    fd->read_watcher = NULL;
-  }
-  if (watcher == fd->write_watcher) {
-    /* remove write watcher, kick if we still need a write */
-    was_polling = 1;
-    if (!got_write) {
-      kick = 1;
-    }
-    fd->write_watcher = NULL;
-  }
-  if (!was_polling && watcher->worker != NULL) {
-    /* remove from inactive list */
-    watcher->next->prev = watcher->prev;
-    watcher->prev->next = watcher->next;
-  }
-  if (got_read) {
-    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
-      kick = 1;
-    }
-
-    if (read_notifier_pollset != NULL) {
-      set_read_notifier_pollset_locked(exec_ctx, fd, read_notifier_pollset);
-    }
-  }
-  if (got_write) {
-    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
-      kick = 1;
-    }
-  }
-  if (kick) {
-    maybe_wake_one_watcher_locked(fd);
-  }
-  if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  GRPC_FD_UNREF(fd, "poll");
-}
-
-static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) { return NULL; }
-
-/*******************************************************************************
- * pollset_posix.c
- */
-
-GPR_TLS_DECL(g_current_thread_poller);
-GPR_TLS_DECL(g_current_thread_worker);
-
-/** The alarm system needs to be able to wakeup 'some poller' sometimes
- *  (specifically when a new alarm needs to be triggered earlier than the next
- *  alarm 'epoch').
- *  This wakeup_fd gives us something to alert on when such a case occurs. */
-grpc_wakeup_fd grpc_global_wakeup_fd;
-
-static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev->next = worker->next;
-  worker->next->prev = worker->prev;
-}
-
-static int pollset_has_workers(grpc_pollset *p) {
-  return p->root_worker.next != &p->root_worker;
-}
-
-static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
-  if (pollset_has_workers(p)) {
-    grpc_pollset_worker *w = p->root_worker.next;
-    remove_worker(p, w);
-    return w;
-  } else {
-    return NULL;
-  }
-}
-
-static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->next = &p->root_worker;
-  worker->prev = worker->next->prev;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev = &p->root_worker;
-  worker->next = worker->prev->next;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-static void kick_append_error(grpc_error **composite, grpc_error *error) {
-  if (error == GRPC_ERROR_NONE) return;
-  if (*composite == GRPC_ERROR_NONE) {
-    *composite = GRPC_ERROR_CREATE("Kick Failure");
-  }
-  *composite = grpc_error_add_child(*composite, error);
-}
-
-static grpc_error *pollset_kick_ext(grpc_pollset *p,
-                                    grpc_pollset_worker *specific_worker,
-                                    uint32_t flags) {
-  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  /* pollset->mu already held */
-  if (specific_worker != NULL) {
-    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
-      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-      for (specific_worker = p->root_worker.next;
-           specific_worker != &p->root_worker;
-           specific_worker = specific_worker->next) {
-        kick_append_error(
-            &error, grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
-      }
-      p->kicked_without_pollers = true;
-      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
-    } else if (gpr_tls_get(&g_current_thread_worker) !=
-               (intptr_t)specific_worker) {
-      GPR_TIMER_MARK("different_thread_worker", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = true;
-      }
-      specific_worker->kicked_specifically = true;
-      kick_append_error(&error,
-                        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
-    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
-      GPR_TIMER_MARK("kick_yoself", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = true;
-      }
-      specific_worker->kicked_specifically = true;
-      kick_append_error(&error,
-                        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
-    }
-  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
-    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-    GPR_TIMER_MARK("kick_anonymous", 0);
-    specific_worker = pop_front_worker(p);
-    if (specific_worker != NULL) {
-      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
-        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
-        push_back_worker(p, specific_worker);
-        specific_worker = pop_front_worker(p);
-        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
-            gpr_tls_get(&g_current_thread_worker) ==
-                (intptr_t)specific_worker) {
-          push_back_worker(p, specific_worker);
-          specific_worker = NULL;
-        }
-      }
-      if (specific_worker != NULL) {
-        GPR_TIMER_MARK("finally_kick", 0);
-        push_back_worker(p, specific_worker);
-        kick_append_error(
-            &error, grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
-      }
-    } else {
-      GPR_TIMER_MARK("kicked_no_pollers", 0);
-      p->kicked_without_pollers = true;
-    }
-  }
-
-  GPR_TIMER_END("pollset_kick_ext", 0);
-  return error;
-}
-
-static grpc_error *pollset_kick(grpc_pollset *p,
-                                grpc_pollset_worker *specific_worker) {
-  return pollset_kick_ext(p, specific_worker, 0);
-}
-
-/* global state management */
-
-static grpc_error *pollset_global_init(void) {
-  gpr_tls_init(&g_current_thread_poller);
-  gpr_tls_init(&g_current_thread_worker);
-  return grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-}
-
-static void pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
-  gpr_tls_destroy(&g_current_thread_poller);
-  gpr_tls_destroy(&g_current_thread_worker);
-}
-
-static grpc_error *kick_poller(void) {
-  return grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd);
-}
-
-/* main interface */
-
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
-
-static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
-  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
-  pollset->in_flight_cbs = 0;
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-  pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
-  pollset->local_wakeup_cache = NULL;
-  pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
-}
-
-static void pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
-  while (pollset->local_wakeup_cache) {
-    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
-    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
-    gpr_free(pollset->local_wakeup_cache);
-    pollset->local_wakeup_cache = next;
-  }
-  gpr_mu_destroy(&pollset->mu);
-}
-
-static void pollset_reset(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
-}
-
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  gpr_mu_lock(&pollset->mu);
-  pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
-/* the following (enabled only in debug) will reacquire and then release
-   our lock - meaning that if the unlocking flag passed to add_fd above is
-   not respected, the code will deadlock (in a way that we have a chance of
-   debugging) */
-#ifndef NDEBUG
-  gpr_mu_lock(&pollset->mu);
-  gpr_mu_unlock(&pollset->mu);
-#endif
-}
-
-static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
-  GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
-  pollset->vtable->finish_shutdown(pollset);
-  grpc_exec_ctx_sched(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE, NULL);
-}
-
-static void work_combine_error(grpc_error **composite, grpc_error *error) {
-  if (error == GRPC_ERROR_NONE) return;
-  if (*composite == GRPC_ERROR_NONE) {
-    *composite = GRPC_ERROR_CREATE("pollset_work");
-  }
-  *composite = grpc_error_add_child(*composite, error);
-}
-
-static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                grpc_pollset_worker **worker_hdl,
-                                gpr_timespec now, gpr_timespec deadline) {
-  grpc_pollset_worker worker;
-  *worker_hdl = &worker;
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  /* pollset->mu already held */
-  int added_worker = 0;
-  int locked = 1;
-  int queued_work = 0;
-  int keep_polling = 0;
-  GPR_TIMER_BEGIN("pollset_work", 0);
-  /* this must happen before we (potentially) drop pollset->mu */
-  worker.next = worker.prev = NULL;
-  worker.reevaluate_polling_on_wakeup = 0;
-  if (pollset->local_wakeup_cache != NULL) {
-    worker.wakeup_fd = pollset->local_wakeup_cache;
-    pollset->local_wakeup_cache = worker.wakeup_fd->next;
-  } else {
-    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
-    error = grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
-    if (error != GRPC_ERROR_NONE) {
-      return error;
-    }
-  }
-  worker.kicked_specifically = 0;
-  /* If there's work waiting for the pollset to be idle, and the
-     pollset is idle, then do that work */
-  if (!pollset_has_workers(pollset) &&
-      !grpc_closure_list_empty(pollset->idle_jobs)) {
-    GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-    goto done;
-  }
-  /* If we're shutting down then we don't execute any extended work */
-  if (pollset->shutting_down) {
-    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
-    goto done;
-  }
-  /* Give do_promote priority so we don't starve it out */
-  if (pollset->in_flight_cbs) {
-    GPR_TIMER_MARK("pollset_work.in_flight_cbs", 0);
-    gpr_mu_unlock(&pollset->mu);
-    locked = 0;
-    goto done;
-  }
-  /* Start polling, and keep doing so while we're being asked to
-     re-evaluate our pollers (this allows poll() based pollers to
-     ensure they don't miss wakeups) */
-  keep_polling = 1;
-  while (keep_polling) {
-    keep_polling = 0;
-    if (!pollset->kicked_without_pollers) {
-      if (!added_worker) {
-        push_front_worker(pollset, &worker);
-        added_worker = 1;
-        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
-      }
-      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
-      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
-      work_combine_error(&error,
-                         pollset->vtable->maybe_work_and_unlock(
-                             exec_ctx, pollset, &worker, deadline, now));
-      GPR_TIMER_END("maybe_work_and_unlock", 0);
-      locked = 0;
-      gpr_tls_set(&g_current_thread_poller, 0);
-    } else {
-      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
-      pollset->kicked_without_pollers = 0;
-    }
-  /* Finished execution - start cleaning up.
-     Note that we may arrive here from outside the enclosing while() loop.
-     In that case we won't loop though as we haven't added worker to the
-     worker list, which means nobody could ask us to re-evaluate polling). */
-  done:
-    if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-      locked = 1;
-    }
-    /* If we're forced to re-evaluate polling (via pollset_kick with
-       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
-       a loop */
-    if (worker.reevaluate_polling_on_wakeup) {
-      worker.reevaluate_polling_on_wakeup = 0;
-      pollset->kicked_without_pollers = 0;
-      if (queued_work || worker.kicked_specifically) {
-        /* If there's queued work on the list, then set the deadline to be
-           immediate so we get back out of the polling loop quickly */
-        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
-      }
-      keep_polling = 1;
-    }
-  }
-  if (added_worker) {
-    remove_worker(pollset, &worker);
-    gpr_tls_set(&g_current_thread_worker, 0);
-  }
-  /* release wakeup fd to the local pool */
-  worker.wakeup_fd->next = pollset->local_wakeup_cache;
-  pollset->local_wakeup_cache = worker.wakeup_fd;
-  /* check shutdown conditions */
-  if (pollset->shutting_down) {
-    if (pollset_has_workers(pollset)) {
-      pollset_kick(pollset, NULL);
-    } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
-      pollset->called_shutdown = 1;
-      gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
-      /* Continuing to access pollset here is safe -- it is the caller's
-       * responsibility to not destroy when it has outstanding calls to
-       * pollset_work.
-       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
-      gpr_mu_lock(&pollset->mu);
-    } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-      gpr_mu_unlock(&pollset->mu);
-      grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-    }
-  }
-  *worker_hdl = NULL;
-  GPR_TIMER_END("pollset_work", 0);
-  return error;
-}
-
-static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                             grpc_closure *closure) {
-  GPR_ASSERT(!pollset->shutting_down);
-  pollset->shutting_down = 1;
-  pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-  if (!pollset_has_workers(pollset)) {
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-  }
-  if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
-      !pollset_has_workers(pollset)) {
-    pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
-  }
-}
-
-static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                           gpr_timespec now) {
-  gpr_timespec timeout;
-  static const int64_t max_spin_polling_us = 10;
-  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
-    return -1;
-  }
-  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
-                                                   max_spin_polling_us,
-                                                   GPR_TIMESPAN))) <= 0) {
-    return 0;
-  }
-  timeout = gpr_time_sub(deadline, now);
-  return gpr_time_to_millis(gpr_time_add(
-      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
-}
-
-/*
- * basic_pollset - a vtable that provides polling for zero or one file
- *                 descriptor via poll()
- */
-
-typedef struct grpc_unary_promote_args {
-  const grpc_pollset_vtable *original_vtable;
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure promotion_closure;
-} grpc_unary_promote_args;
-
-static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
-                             grpc_error *error) {
-  grpc_unary_promote_args *up_args = args;
-  const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
-  grpc_pollset *pollset = up_args->pollset;
-  grpc_fd *fd = up_args->fd;
-
-  /*
-   * This is quite tricky. There are a number of cases to keep in mind here:
-   * 1. fd may have been orphaned
-   * 2. The pollset may no longer be a unary poller (and we can't let case #1
-   * leak to other pollset types!)
-   * 3. pollset's fd (which may have changed) may have been orphaned
-   * 4. The pollset may be shutting down.
-   */
-
-  gpr_mu_lock(&pollset->mu);
-  /* First we need to ensure that nobody is polling concurrently */
-  GPR_ASSERT(!pollset_has_workers(pollset));
-
-  gpr_free(up_args);
-  /* At this point the pollset may no longer be a unary poller. In that case
-   * we should just call the right add function and be done. */
-  /* TODO(klempner): If we're not careful this could cause infinite recursion.
-   * That's not a problem for now because empty_pollset has a trivial poller
-   * and we don't have any mechanism to unbecome multipoller. */
-  pollset->in_flight_cbs--;
-  if (pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
-      pollset->called_shutdown = 1;
-      finish_shutdown(exec_ctx, pollset);
-    }
-  } else if (fd_is_orphaned(fd)) {
-    /* Don't try to add it to anything, we'll drop our ref on it below */
-  } else if (pollset->vtable != original_vtable) {
-    pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
-  } else if (fd != pollset->data.ptr) {
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] && !fd_is_orphaned(fds[0])) {
-      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      /* Note that it is possible that fds[1] is also orphaned at this point.
-       * That's okay, we'll correct it at the next add or poll. */
-      if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-  }
-
-  gpr_mu_unlock(&pollset->mu);
-
-  /* Matching ref in basic_pollset_add_fd */
-  GRPC_FD_UNREF(fd, "basicpoll_add");
-}
-
-static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                 grpc_fd *fd, int and_unlock_pollset) {
-  grpc_unary_promote_args *up_args;
-  GPR_ASSERT(fd);
-  if (fd == pollset->data.ptr) goto exit;
-
-  if (!pollset_has_workers(pollset)) {
-    /* Fast path -- no in flight cbs */
-    /* TODO(klempner): Comment this out and fix any test failures or establish
-     * they are due to timing issues */
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] == NULL) {
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    } else if (!fd_is_orphaned(fds[0])) {
-      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-    goto exit;
-  }
-
-  /* Now we need to promote. This needs to happen when we're not polling. Since
-   * this may be called from poll, the wait needs to happen asynchronously. */
-  GRPC_FD_REF(fd, "basicpoll_add");
-  pollset->in_flight_cbs++;
-  up_args = gpr_malloc(sizeof(*up_args));
-  up_args->fd = fd;
-  up_args->original_vtable = pollset->vtable;
-  up_args->pollset = pollset;
-  up_args->promotion_closure.cb = basic_do_promote;
-  up_args->promotion_closure.cb_arg = up_args;
-
-  grpc_closure_list_append(&pollset->idle_jobs, &up_args->promotion_closure,
-                           GRPC_ERROR_NONE);
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-exit:
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-  }
-}
-
-static grpc_error *basic_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
-#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
-
-  struct pollfd pfd[3];
-  grpc_fd *fd;
-  grpc_fd_watcher fd_watcher;
-  int timeout;
-  int r;
-  nfds_t nfds;
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  fd = pollset->data.ptr;
-  if (fd && fd_is_orphaned(fd)) {
-    GRPC_FD_UNREF(fd, "basicpoll");
-    fd = pollset->data.ptr = NULL;
-  }
-  timeout = poll_deadline_to_millis_timeout(deadline, now);
-  pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
-  pfd[0].events = POLLIN;
-  pfd[0].revents = 0;
-  pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfd[1].events = POLLIN;
-  pfd[1].revents = 0;
-  nfds = 2;
-  if (fd) {
-    pfd[2].fd = fd->fd;
-    pfd[2].revents = 0;
-    GRPC_FD_REF(fd, "basicpoll_begin");
-    gpr_mu_unlock(&pollset->mu);
-    pfd[2].events =
-        (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT, &fd_watcher);
-    if (pfd[2].events != 0) {
-      nfds++;
-    }
-  } else {
-    gpr_mu_unlock(&pollset->mu);
-  }
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  /* poll fd count (argument 2) is shortened by one if we have no events
-     to poll on - such that it only includes the kicker */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  r = grpc_poll_function(pfd, nfds, timeout);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (r < 0) {
-    if (errno != EINTR) {
-      work_combine_error(&error, GRPC_OS_ERROR(errno, "poll"));
-    }
-    if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0, NULL);
-    }
-  } else if (r == 0) {
-    if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0, NULL);
-    }
-  } else {
-    if (pfd[0].revents & POLLIN_CHECK) {
-      work_combine_error(&error,
-                         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
-    }
-    if (pfd[1].revents & POLLIN_CHECK) {
-      work_combine_error(&error,
-                         grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd));
-    }
-    if (nfds > 2) {
-      fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
-                  pfd[2].revents & POLLOUT_CHECK, pollset);
-    } else if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0, NULL);
-    }
-  }
-
-  if (fd) {
-    GRPC_FD_UNREF(fd, "basicpoll_begin");
-  }
-
-  return error;
-}
-
-static void basic_pollset_destroy(grpc_pollset *pollset) {
-  if (pollset->data.ptr != NULL) {
-    GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
-    pollset->data.ptr = NULL;
-  }
-}
-
-static const grpc_pollset_vtable basic_pollset = {
-    basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
-    basic_pollset_destroy, basic_pollset_destroy};
-
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
-  pollset->vtable = &basic_pollset;
-  pollset->data.ptr = fd_or_null;
-  if (fd_or_null != NULL) {
-    GRPC_FD_REF(fd_or_null, "basicpoll");
-  }
-}
-
-/*******************************************************************************
- * pollset_multipoller_with_poll_posix.c
- */
-
-#ifndef GRPC_LINUX_MULTIPOLL_WITH_EPOLL
-
-typedef struct {
-  /* all polled fds */
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-  /* fds that have been removed from the pollset explicitly */
-  size_t del_count;
-  size_t del_capacity;
-  grpc_fd **dels;
-} poll_hdr;
-
-static void multipoll_with_poll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                               grpc_pollset *pollset,
-                                               grpc_fd *fd,
-                                               int and_unlock_pollset) {
-  size_t i;
-  poll_hdr *h = pollset->data.ptr;
-  /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
-  for (i = 0; i < h->fd_count; i++) {
-    if (h->fds[i] == fd) goto exit;
-  }
-  if (h->fd_count == h->fd_capacity) {
-    h->fd_capacity = GPR_MAX(h->fd_capacity + 8, h->fd_count * 3 / 2);
-    h->fds = gpr_realloc(h->fds, sizeof(grpc_fd *) * h->fd_capacity);
-  }
-  h->fds[h->fd_count++] = fd;
-  GRPC_FD_REF(fd, "multipoller");
-exit:
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-  }
-}
-
-static grpc_error *multipoll_with_poll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
-#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
-
-  int timeout;
-  int r;
-  size_t i, j, fd_count;
-  nfds_t pfd_count;
-  poll_hdr *h;
-  /* TODO(ctiller): inline some elements to avoid an allocation */
-  grpc_fd_watcher *watchers;
-  struct pollfd *pfds;
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  h = pollset->data.ptr;
-  timeout = poll_deadline_to_millis_timeout(deadline, now);
-  /* TODO(ctiller): perform just one malloc here if we exceed the inline case */
-  pfds = gpr_malloc(sizeof(*pfds) * (h->fd_count + 2));
-  watchers = gpr_malloc(sizeof(*watchers) * (h->fd_count + 2));
-  fd_count = 0;
-  pfd_count = 2;
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-  for (i = 0; i < h->fd_count; i++) {
-    int remove = fd_is_orphaned(h->fds[i]);
-    for (j = 0; !remove && j < h->del_count; j++) {
-      if (h->fds[i] == h->dels[j]) remove = 1;
-    }
-    if (remove) {
-      GRPC_FD_UNREF(h->fds[i], "multipoller");
-    } else {
-      h->fds[fd_count++] = h->fds[i];
-      watchers[pfd_count].fd = h->fds[i];
-      GRPC_FD_REF(watchers[pfd_count].fd, "multipoller_start");
-      pfds[pfd_count].fd = h->fds[i]->fd;
-      pfds[pfd_count].revents = 0;
-      pfd_count++;
-    }
-  }
-  for (j = 0; j < h->del_count; j++) {
-    GRPC_FD_UNREF(h->dels[j], "multipoller_del");
-  }
-  h->del_count = 0;
-  h->fd_count = fd_count;
-  gpr_mu_unlock(&pollset->mu);
-
-  for (i = 2; i < pfd_count; i++) {
-    grpc_fd *fd = watchers[i].fd;
-    pfds[i].events = (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT,
-                                          &watchers[i]);
-    GRPC_FD_UNREF(fd, "multipoller_start");
-  }
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  r = grpc_poll_function(pfds, pfd_count, timeout);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-
-  if (r < 0) {
-    if (errno != EINTR) {
-      work_combine_error(&error, GRPC_OS_ERROR(errno, "poll"));
-    }
-    for (i = 2; i < pfd_count; i++) {
-      fd_end_poll(exec_ctx, &watchers[i], 0, 0, NULL);
-    }
-  } else if (r == 0) {
-    for (i = 2; i < pfd_count; i++) {
-      fd_end_poll(exec_ctx, &watchers[i], 0, 0, NULL);
-    }
-  } else {
-    if (pfds[0].revents & POLLIN_CHECK) {
-      work_combine_error(&error,
-                         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
-    }
-    if (pfds[1].revents & POLLIN_CHECK) {
-      work_combine_error(&error,
-                         grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd));
-    }
-    for (i = 2; i < pfd_count; i++) {
-      if (watchers[i].fd == NULL) {
-        fd_end_poll(exec_ctx, &watchers[i], 0, 0, NULL);
-        continue;
-      }
-      fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
-                  pfds[i].revents & POLLOUT_CHECK, pollset);
-    }
-  }
-
-  gpr_free(pfds);
-  gpr_free(watchers);
-
-  return error;
-}
-
-static void multipoll_with_poll_pollset_finish_shutdown(grpc_pollset *pollset) {
-  size_t i;
-  poll_hdr *h = pollset->data.ptr;
-  for (i = 0; i < h->fd_count; i++) {
-    GRPC_FD_UNREF(h->fds[i], "multipoller");
-  }
-  for (i = 0; i < h->del_count; i++) {
-    GRPC_FD_UNREF(h->dels[i], "multipoller_del");
-  }
-  h->fd_count = 0;
-  h->del_count = 0;
-}
-
-static void multipoll_with_poll_pollset_destroy(grpc_pollset *pollset) {
-  poll_hdr *h = pollset->data.ptr;
-  multipoll_with_poll_pollset_finish_shutdown(pollset);
-  gpr_free(h->fds);
-  gpr_free(h->dels);
-  gpr_free(h);
-}
-
-static const grpc_pollset_vtable multipoll_with_poll_pollset = {
-    multipoll_with_poll_pollset_add_fd,
-    multipoll_with_poll_pollset_maybe_work_and_unlock,
-    multipoll_with_poll_pollset_finish_shutdown,
-    multipoll_with_poll_pollset_destroy};
-
-static void poll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset *pollset, grpc_fd **fds,
-                                    size_t nfds) {
-  size_t i;
-  poll_hdr *h = gpr_malloc(sizeof(poll_hdr));
-  pollset->vtable = &multipoll_with_poll_pollset;
-  pollset->data.ptr = h;
-  h->fd_count = nfds;
-  h->fd_capacity = nfds;
-  h->fds = gpr_malloc(nfds * sizeof(grpc_fd *));
-  h->del_count = 0;
-  h->del_capacity = 0;
-  h->dels = NULL;
-  for (i = 0; i < nfds; i++) {
-    h->fds[i] = fds[i];
-    GRPC_FD_REF(fds[i], "multipoller");
-  }
-}
-
-#endif /* !GRPC_LINUX_MULTIPOLL_WITH_EPOLL */
-
-/*******************************************************************************
- * pollset_multipoller_with_epoll_posix.c
- */
-
-#ifdef GRPC_LINUX_MULTIPOLL_WITH_EPOLL
-
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/ev_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st,
-                      grpc_pollset *read_notifier_pollset) {
-  /* only one set_ready can be active at once (but there may be a racing
-     notify_on) */
-  gpr_mu_lock(&fd->mu);
-  set_ready_locked(exec_ctx, fd, st);
-
-  /* A non-NULL read_notifier_pollset means that the fd is readable. */
-  if (read_notifier_pollset != NULL) {
-    /* Note: Since the fd might be a part of multiple pollsets, this might be
-     * called multiple times (for each time the fd becomes readable) and it is
-     * okay to set the fd's read-notifier pollset to anyone of these pollsets */
-    set_read_notifier_pollset_locked(exec_ctx, fd, read_notifier_pollset);
-  }
-
-  gpr_mu_unlock(&fd->mu);
-}
-
-static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                               grpc_pollset *notifier_pollset) {
-  set_ready(exec_ctx, fd, &fd->read_closure, notifier_pollset);
-}
-
-static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->write_closure, NULL);
-}
-
-struct epoll_fd_list {
-  int *epoll_fds;
-  size_t count;
-  size_t capacity;
-};
-
-static struct epoll_fd_list epoll_fd_global_list;
-static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
-static gpr_mu epoll_fd_list_mu;
-
-static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
-
-static void add_epoll_fd_to_global_list(int epoll_fd) {
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
-    epoll_fd_global_list.capacity =
-        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
-    epoll_fd_global_list.epoll_fds =
-        gpr_realloc(epoll_fd_global_list.epoll_fds,
-                    epoll_fd_global_list.capacity * sizeof(int));
-  }
-  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_epoll_fd_from_global_list(int epoll_fd) {
-  gpr_mu_lock(&epoll_fd_list_mu);
-  GPR_ASSERT(epoll_fd_global_list.count > 0);
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
-      epoll_fd_global_list.epoll_fds[i] =
-          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
-      break;
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_fd_from_all_epoll_sets(int fd) {
-  int err;
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == 0) {
-    gpr_mu_unlock(&epoll_fd_list_mu);
-    return;
-  }
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
-    if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
-              strerror(errno));
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-typedef struct {
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure closure;
-} delayed_add;
-
-typedef struct { int epoll_fd; } epoll_hdr;
-
-static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  epoll_hdr *h = pollset->data.ptr;
-  struct epoll_event ev;
-  int err;
-  grpc_fd_watcher watcher;
-
-  /* We pretend to be polling whilst adding an fd to keep the fd from being
-     closed during the add. This may result in a spurious wakeup being assigned
-     to this pollset whilst adding, but that should be benign. */
-  GPR_ASSERT(fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
-  if (watcher.fd != NULL) {
-    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-    ev.data.ptr = fd;
-    err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
-    if (err < 0) {
-      /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
-      if (errno != EEXIST) {
-        gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
-                strerror(errno));
-      }
-    }
-  }
-  fd_end_poll(exec_ctx, &watcher, 0, 0, NULL);
-}
-
-static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
-                                grpc_error *error) {
-  delayed_add *da = arg;
-
-  if (!fd_is_orphaned(da->fd)) {
-    finally_add_fd(exec_ctx, da->pollset, da->fd);
-  }
-
-  gpr_mu_lock(&da->pollset->mu);
-  da->pollset->in_flight_cbs--;
-  if (da->pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
-      da->pollset->called_shutdown = 1;
-      grpc_exec_ctx_sched(exec_ctx, da->pollset->shutdown_done, GRPC_ERROR_NONE,
-                          NULL);
-    }
-  }
-  gpr_mu_unlock(&da->pollset->mu);
-
-  GRPC_FD_UNREF(da->fd, "delayed_add");
-
-  gpr_free(da);
-}
-
-static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_fd *fd,
-                                                int and_unlock_pollset) {
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-    finally_add_fd(exec_ctx, pollset, fd);
-  } else {
-    delayed_add *da = gpr_malloc(sizeof(*da));
-    da->pollset = pollset;
-    da->fd = fd;
-    GRPC_FD_REF(fd, "delayed_add");
-    grpc_closure_init(&da->closure, perform_delayed_add, da);
-    pollset->in_flight_cbs++;
-    grpc_exec_ctx_sched(exec_ctx, &da->closure, GRPC_ERROR_NONE, NULL);
-  }
-}
-
-/* TODO(klempner): We probably want to turn this down a bit */
-#define GRPC_EPOLL_MAX_EVENTS 1000
-
-static grpc_error *multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int ep_rv;
-  int poll_rv;
-  epoll_hdr *h = pollset->data.ptr;
-  int timeout_ms;
-  struct pollfd pfds[2];
-  grpc_error *error = GRPC_ERROR_NONE;
-
-  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
-   * for a more apples-to-apples performance comparison with poll, add a
-   * if (pollset->counter != 0) { return 0; }
-   * here.
-   */
-
-  gpr_mu_unlock(&pollset->mu);
-
-  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
-
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = h->epoll_fd;
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (poll_rv < 0) {
-    if (errno != EINTR) {
-      work_combine_error(&error, GRPC_OS_ERROR(errno, "poll"));
-    }
-  } else if (poll_rv == 0) {
-    /* do nothing */
-  } else {
-    if (pfds[0].revents) {
-      work_combine_error(&error,
-                         grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd));
-    }
-    if (pfds[1].revents) {
-      do {
-        /* The following epoll_wait never blocks; it has a timeout of 0 */
-        ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-        if (ep_rv < 0) {
-          if (errno != EINTR) {
-            work_combine_error(&error, GRPC_OS_ERROR(errno, "epoll_wait"));
-          }
-        } else {
-          int i;
-          for (i = 0; i < ep_rv; ++i) {
-            grpc_fd *fd = ep_ev[i].data.ptr;
-            /* TODO(klempner): We might want to consider making err and pri
-             * separate events */
-            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-            int write_ev = ep_ev[i].events & EPOLLOUT;
-            if (fd == NULL) {
-              work_combine_error(&error, grpc_wakeup_fd_consume_wakeup(
-                                             &grpc_global_wakeup_fd));
-            } else {
-              if (read_ev || cancel) {
-                fd_become_readable(exec_ctx, fd, pollset);
-              }
-              if (write_ev || cancel) {
-                fd_become_writable(exec_ctx, fd);
-              }
-            }
-          }
-        }
-      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
-    }
-  }
-  return error;
-}
-
-static void multipoll_with_epoll_pollset_finish_shutdown(
-    grpc_pollset *pollset) {}
-
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
-  epoll_hdr *h = pollset->data.ptr;
-  close(h->epoll_fd);
-  remove_epoll_fd_from_global_list(h->epoll_fd);
-  gpr_free(h);
-}
-
-static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
-    multipoll_with_epoll_pollset_add_fd,
-    multipoll_with_epoll_pollset_maybe_work_and_unlock,
-    multipoll_with_epoll_pollset_finish_shutdown,
-    multipoll_with_epoll_pollset_destroy};
-
-static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                     grpc_pollset *pollset, grpc_fd **fds,
-                                     size_t nfds) {
-  size_t i;
-  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
-  struct epoll_event ev;
-  int err;
-
-  pollset->vtable = &multipoll_with_epoll_pollset;
-  pollset->data.ptr = h;
-  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (h->epoll_fd < 0) {
-    /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
-    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
-    abort();
-  }
-  add_epoll_fd_to_global_list(h->epoll_fd);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
-            strerror(errno));
-  }
-
-  for (i = 0; i < nfds; i++) {
-    multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
-  }
-}
-
-#else /* GRPC_LINUX_MULTIPOLL_WITH_EPOLL */
-
-static void remove_fd_from_all_epoll_sets(int fd) {}
-
-#endif /* GRPC_LINUX_MULTIPOLL_WITH_EPOLL */
-
-/*******************************************************************************
- * pollset_set_posix.c
- */
-
-static grpc_pollset_set *pollset_set_create(void) {
-  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
-  memset(pollset_set, 0, sizeof(*pollset_set));
-  gpr_mu_init(&pollset_set->mu);
-  return pollset_set;
-}
-
-static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
-  size_t i;
-  gpr_mu_destroy(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-  }
-  gpr_free(pollset_set->pollsets);
-  gpr_free(pollset_set->pollset_sets);
-  gpr_free(pollset_set->fds);
-  gpr_free(pollset_set);
-}
-
-static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i, j;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
-    pollset_set->pollset_capacity =
-        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
-    pollset_set->pollsets =
-        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
-                                               sizeof(*pollset_set->pollsets));
-  }
-  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
-  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
-    if (fd_is_orphaned(pollset_set->fds[i])) {
-      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-    } else {
-      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
-      pollset_set->fds[j++] = pollset_set->fds[i];
-    }
-  }
-  pollset_set->fd_count = j;
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    if (pollset_set->pollsets[i] == pollset) {
-      pollset_set->pollset_count--;
-      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
-               pollset_set->pollsets[pollset_set->pollset_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
-                                        grpc_pollset_set *bag,
-                                        grpc_pollset_set *item) {
-  size_t i, j;
-  gpr_mu_lock(&bag->mu);
-  if (bag->pollset_set_count == bag->pollset_set_capacity) {
-    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
-    bag->pollset_sets =
-        gpr_realloc(bag->pollset_sets,
-                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
-  }
-  bag->pollset_sets[bag->pollset_set_count++] = item;
-  for (i = 0, j = 0; i < bag->fd_count; i++) {
-    if (fd_is_orphaned(bag->fds[i])) {
-      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
-    } else {
-      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
-      bag->fds[j++] = bag->fds[i];
-    }
-  }
-  bag->fd_count = j;
-  gpr_mu_unlock(&bag->mu);
-}
-
-static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
-                                        grpc_pollset_set *bag,
-                                        grpc_pollset_set *item) {
-  size_t i;
-  gpr_mu_lock(&bag->mu);
-  for (i = 0; i < bag->pollset_set_count; i++) {
-    if (bag->pollset_sets[i] == item) {
-      bag->pollset_set_count--;
-      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
-               bag->pollset_sets[bag->pollset_set_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&bag->mu);
-}
-
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->fd_count == pollset_set->fd_capacity) {
-    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
-  }
-  GRPC_FD_REF(fd, "pollset_set");
-  pollset_set->fds[pollset_set->fd_count++] = fd;
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    if (pollset_set->fds[i] == fd) {
-      pollset_set->fd_count--;
-      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
-               pollset_set->fds[pollset_set->fd_count]);
-      GRPC_FD_UNREF(fd, "pollset_set");
-      break;
-    }
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-/*******************************************************************************
- * workqueue stubs
- */
-
-#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
-static grpc_workqueue *workqueue_ref(grpc_workqueue *workqueue,
-                                     const char *file, int line,
-                                     const char *reason) {
-  return workqueue;
-}
-static void workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue,
-                            const char *file, int line, const char *reason) {}
-#else
-static grpc_workqueue *workqueue_ref(grpc_workqueue *workqueue) {
-  return workqueue;
-}
-static void workqueue_unref(grpc_exec_ctx *exec_ctx,
-                            grpc_workqueue *workqueue) {}
-#endif
-
-static void workqueue_enqueue(grpc_exec_ctx *exec_ctx,
-                              grpc_workqueue *workqueue, grpc_closure *closure,
-                              grpc_error *error) {
-  grpc_exec_ctx_sched(exec_ctx, closure, error, NULL);
-}
-
-/*******************************************************************************
- * event engine binding
- */
-
-static void shutdown_engine(void) {
-  fd_global_shutdown();
-  pollset_global_shutdown();
-}
-
-static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_is_shutdown = fd_is_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
-    .fd_get_workqueue = fd_get_workqueue,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_reset = pollset_reset,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .kick_poller = kick_poller,
-
-    .workqueue_ref = workqueue_ref,
-    .workqueue_unref = workqueue_unref,
-    .workqueue_enqueue = workqueue_enqueue,
-
-    .shutdown_engine = shutdown_engine,
-};
-
-const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void) {
-#ifdef GRPC_LINUX_MULTIPOLL_WITH_EPOLL
-  platform_become_multipoller = epoll_become_multipoller;
-#else
-  platform_become_multipoller = poll_become_multipoller;
-#endif
-  fd_global_init();
-  pollset_global_init();
-  return &vtable;
-}
-
-#endif
diff --git a/src/core/lib/iomgr/ev_poll_posix.c b/src/core/lib/iomgr/ev_poll_posix.c
index e1d620cfff..21b28e5554 100644
--- a/src/core/lib/iomgr/ev_poll_posix.c
+++ b/src/core/lib/iomgr/ev_poll_posix.c
@@ -120,6 +120,8 @@ struct grpc_fd {
   grpc_pollset *read_notifier_pollset;
 };
 
+static grpc_wakeup_fd global_wakeup_fd;
+
 /* Begin polling on an fd.
    Registers that the given pollset is interested in this fd - so that if read
    or writability interest changes, the pollset can be kicked to pick up that
@@ -769,17 +771,17 @@ static grpc_error *pollset_kick(grpc_pollset *p,
 static grpc_error *pollset_global_init(void) {
   gpr_tls_init(&g_current_thread_poller);
   gpr_tls_init(&g_current_thread_worker);
-  return grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  return grpc_wakeup_fd_init(&global_wakeup_fd);
 }
 
 static void pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  grpc_wakeup_fd_destroy(&global_wakeup_fd);
   gpr_tls_destroy(&g_current_thread_poller);
   gpr_tls_destroy(&g_current_thread_worker);
 }
 
 static grpc_error *kick_poller(void) {
-  return grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd);
+  return grpc_wakeup_fd_wakeup(&global_wakeup_fd);
 }
 
 /* main interface */
@@ -947,7 +949,7 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
       fd_count = 0;
       pfd_count = 2;
-      pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+      pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&global_wakeup_fd);
       pfds[0].events = POLLIN;
       pfds[0].revents = 0;
       pfds[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker.wakeup_fd->fd);
@@ -1001,8 +1003,8 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
         }
       } else {
         if (pfds[0].revents & POLLIN_CHECK) {
-          work_combine_error(
-              &error, grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
+          work_combine_error(&error,
+                             grpc_wakeup_fd_consume_wakeup(&global_wakeup_fd));
         }
         if (pfds[1].revents & POLLIN_CHECK) {
           work_combine_error(
@@ -1343,6 +1345,7 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
   int res, idx;
   gpr_cv *pollcv;
   cv_node *cvn, *prev;
+  int skip_poll = 0;
   nfds_t nsockfds = 0;
   gpr_thd_id t_id;
   gpr_thd_options opt;
@@ -1358,17 +1361,17 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
       cvn->cv = pollcv;
       cvn->next = g_cvfds.cvfds[idx].cvs;
       g_cvfds.cvfds[idx].cvs = cvn;
-      // We should return immediately if there are pending events,
-      // but we still need to call poll() to check for socket events
+      // Don't bother polling if a wakeup fd is ready
       if (g_cvfds.cvfds[idx].is_set) {
-        timeout = 0;
+        skip_poll = 1;
       }
     } else if (fds[i].fd >= 0) {
       nsockfds++;
     }
   }
 
-  if (nsockfds > 0) {
+  res = 0;
+  if (!skip_poll && nsockfds > 0) {
     pargs = gpr_malloc(sizeof(struct poll_args));
     // Both the main thread and calling thread get a reference
     gpr_ref_init(&pargs->refcount, 2);
@@ -1398,16 +1401,14 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
       res = pargs->retval;
       errno = pargs->err;
     } else {
-      res = 0;
       errno = 0;
       gpr_atm_no_barrier_store(&pargs->status, CANCELLED);
     }
-  } else {
+  } else if (!skip_poll) {
     gpr_timespec deadline = gpr_now(GPR_CLOCK_REALTIME);
     deadline =
         gpr_time_add(deadline, gpr_time_from_millis(timeout, GPR_TIMESPAN));
     gpr_cv_wait(pollcv, &g_cvfds.mu, deadline);
-    res = 0;
   }
 
   idx = 0;
@@ -1431,7 +1432,7 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
         fds[i].revents = POLLIN;
         if (res >= 0) res++;
       }
-    } else if (fds[i].fd >= 0 &&
+    } else if (!skip_poll && fds[i].fd >= 0 &&
                gpr_atm_no_barrier_load(&pargs->status) == COMPLETED) {
       fds[i].revents = pargs->fds[idx].revents;
       idx++;
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index ef36ba89b2..ab139895fd 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -45,7 +45,6 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
-#include "src/core/lib/iomgr/ev_poll_and_epoll_posix.h"
 #include "src/core/lib/iomgr/ev_poll_posix.h"
 #include "src/core/lib/support/env.h"
 
@@ -67,7 +66,6 @@ static const event_engine_factory g_factories[] = {
     {"epoll", grpc_init_epoll_linux},
     {"poll", grpc_init_poll_posix},
     {"poll-cv", grpc_init_poll_cv_posix},
-    {"legacy", grpc_init_poll_and_epoll_posix},
 };
 
 static void add(const char *beg, const char *end, char ***ss, size_t *ns) {
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 2fdef06838..cb5832539d 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -183,6 +183,5 @@ void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
 /* override to allow tests to hook poll() usage */
 typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
 extern grpc_poll_function_type grpc_poll_function;
-extern grpc_wakeup_fd grpc_global_wakeup_fd;
 
 #endif /* GRPC_CORE_LIB_IOMGR_EV_POSIX_H */
diff --git a/src/core/lib/iomgr/iomgr.c b/src/core/lib/iomgr/iomgr.c
index 4fd83e0b22..3470b5ac81 100644
--- a/src/core/lib/iomgr/iomgr.c
+++ b/src/core/lib/iomgr/iomgr.c
@@ -108,6 +108,7 @@ void grpc_iomgr_shutdown(void) {
                          NULL)) {
       gpr_mu_unlock(&g_mu);
       grpc_exec_ctx_flush(&exec_ctx);
+      grpc_iomgr_platform_flush();
       gpr_mu_lock(&g_mu);
       continue;
     }
diff --git a/src/core/lib/iomgr/load_file.c b/src/core/lib/iomgr/load_file.c
index b62ecbc534..217bc5da59 100644
--- a/src/core/lib/iomgr/load_file.c
+++ b/src/core/lib/iomgr/load_file.c
@@ -44,10 +44,10 @@
 #include "src/core/lib/support/string.h"
 
 grpc_error *grpc_load_file(const char *filename, int add_null_terminator,
-                           gpr_slice *output) {
+                           grpc_slice *output) {
   unsigned char *contents = NULL;
   size_t contents_size = 0;
-  gpr_slice result = gpr_empty_slice();
+  grpc_slice result = gpr_empty_slice();
   FILE *file;
   size_t bytes_read = 0;
   grpc_error *error = GRPC_ERROR_NONE;
@@ -72,7 +72,7 @@ grpc_error *grpc_load_file(const char *filename, int add_null_terminator,
   if (add_null_terminator) {
     contents[contents_size++] = 0;
   }
-  result = gpr_slice_new(contents, contents_size, gpr_free);
+  result = grpc_slice_new(contents, contents_size, gpr_free);
 
 end:
   *output = result;
diff --git a/src/core/lib/iomgr/load_file.h b/src/core/lib/iomgr/load_file.h
index 9aac2225d1..73ee8c3abf 100644
--- a/src/core/lib/iomgr/load_file.h
+++ b/src/core/lib/iomgr/load_file.h
@@ -36,7 +36,7 @@
 
 #include <stdio.h>
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 #include "src/core/lib/iomgr/error.h"
 
@@ -47,7 +47,7 @@ extern "C" {
 /* Loads the content of a file into a slice. add_null_terminator will add
    a NULL terminator if non-zero. */
 grpc_error *grpc_load_file(const char *filename, int add_null_terminator,
-                           gpr_slice *slice);
+                           grpc_slice *slice);
 
 #ifdef __cplusplus
 }
diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
index b4bb7e3cf7..a5ca9ed2c3 100644
--- a/src/core/lib/iomgr/network_status_tracker.c
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -46,7 +46,7 @@ static gpr_mu g_endpoint_mutex;
 void grpc_network_status_shutdown(void) {
   if (head != NULL) {
     gpr_log(GPR_ERROR,
-            "Memory leaked as all network endpoints were not shut down");
+            "Memory leaked as not all network endpoints were shut down");
   }
   gpr_mu_destroy(&g_endpoint_mutex);
 }
diff --git a/src/core/lib/iomgr/port.h b/src/core/lib/iomgr/port.h
index c0bb3b5a23..f1897bb91f 100644
--- a/src/core/lib/iomgr/port.h
+++ b/src/core/lib/iomgr/port.h
@@ -90,7 +90,6 @@
 #define GRPC_POSIX_SOCKETUTILS
 #endif
 #elif defined(GPR_APPLE)
-#define GRPC_HAVE_IP_PKTINFO 1
 #define GRPC_HAVE_SO_NOSIGPIPE 1
 #define GRPC_HAVE_UNIX_SOCKET 1
 #define GRPC_MSG_IOVLEN_TYPE int
@@ -102,7 +101,6 @@
 #define GRPC_TIMER_USE_GENERIC 1
 #elif defined(GPR_FREEBSD)
 #define GRPC_HAVE_IPV6_RECVPKTINFO 1
-#define GRPC_HAVE_IP_PKTINFO 1
 #define GRPC_HAVE_SO_NOSIGPIPE 1
 #define GRPC_HAVE_UNIX_SOCKET 1
 #define GRPC_POSIX_NO_SPECIAL_WAKEUP_FD 1
diff --git a/src/core/lib/iomgr/resolve_address.h b/src/core/lib/iomgr/resolve_address.h
index 275924448a..e03d16fa4e 100644
--- a/src/core/lib/iomgr/resolve_address.h
+++ b/src/core/lib/iomgr/resolve_address.h
@@ -36,6 +36,7 @@
 
 #include <stddef.h>
 #include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/pollset_set.h"
 
 #define GRPC_MAX_SOCKADDR_SIZE 128
 
@@ -54,6 +55,7 @@ typedef struct {
 /* TODO(ctiller): add a timeout here */
 extern void (*grpc_resolve_address)(grpc_exec_ctx *exec_ctx, const char *addr,
                                     const char *default_port,
+                                    grpc_pollset_set *interested_parties,
                                     grpc_closure *on_done,
                                     grpc_resolved_addresses **addresses);
 /* Destroy resolved addresses */
diff --git a/src/core/lib/iomgr/resolve_address_posix.c b/src/core/lib/iomgr/resolve_address_posix.c
index de791b2b67..821932e562 100644
--- a/src/core/lib/iomgr/resolve_address_posix.c
+++ b/src/core/lib/iomgr/resolve_address_posix.c
@@ -181,6 +181,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
 
 static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
                                  const char *default_port,
+                                 grpc_pollset_set *interested_parties,
                                  grpc_closure *on_done,
                                  grpc_resolved_addresses **addrs) {
   request *r = gpr_malloc(sizeof(request));
@@ -192,9 +193,9 @@ static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
   grpc_executor_push(&r->request_closure, GRPC_ERROR_NONE);
 }
 
-void (*grpc_resolve_address)(grpc_exec_ctx *exec_ctx, const char *name,
-                             const char *default_port, grpc_closure *on_done,
-                             grpc_resolved_addresses **addrs) =
-    resolve_address_impl;
+void (*grpc_resolve_address)(
+    grpc_exec_ctx *exec_ctx, const char *name, const char *default_port,
+    grpc_pollset_set *interested_parties, grpc_closure *on_done,
+    grpc_resolved_addresses **addrs) = resolve_address_impl;
 
 #endif
diff --git a/src/core/lib/iomgr/resolve_address_uv.c b/src/core/lib/iomgr/resolve_address_uv.c
index b8295acfa1..3269c4f09f 100644
--- a/src/core/lib/iomgr/resolve_address_uv.c
+++ b/src/core/lib/iomgr/resolve_address_uv.c
@@ -181,6 +181,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
 
 static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
                                  const char *default_port,
+                                 grpc_pollset_set *interested_parties,
                                  grpc_closure *on_done,
                                  grpc_resolved_addresses **addrs) {
   uv_getaddrinfo_t *req;
@@ -223,9 +224,9 @@ static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
   }
 }
 
-void (*grpc_resolve_address)(grpc_exec_ctx *exec_ctx, const char *name,
-                             const char *default_port, grpc_closure *on_done,
-                             grpc_resolved_addresses **addrs) =
-    resolve_address_impl;
+void (*grpc_resolve_address)(
+    grpc_exec_ctx *exec_ctx, const char *name, const char *default_port,
+    grpc_pollset_set *interested_parties, grpc_closure *on_done,
+    grpc_resolved_addresses **addrs) = resolve_address_impl;
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/resolve_address_windows.c b/src/core/lib/iomgr/resolve_address_windows.c
index e139293c03..fada5ecbe8 100644
--- a/src/core/lib/iomgr/resolve_address_windows.c
+++ b/src/core/lib/iomgr/resolve_address_windows.c
@@ -169,6 +169,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
 
 static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
                                  const char *default_port,
+                                 grpc_pollset_set *interested_parties,
                                  grpc_closure *on_done,
                                  grpc_resolved_addresses **addresses) {
   request *r = gpr_malloc(sizeof(request));
@@ -180,9 +181,9 @@ static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
   grpc_executor_push(&r->request_closure, GRPC_ERROR_NONE);
 }
 
-void (*grpc_resolve_address)(grpc_exec_ctx *exec_ctx, const char *name,
-                             const char *default_port, grpc_closure *on_done,
-                             grpc_resolved_addresses **addresses) =
-    resolve_address_impl;
+void (*grpc_resolve_address)(
+    grpc_exec_ctx *exec_ctx, const char *name, const char *default_port,
+    grpc_pollset_set *interested_parties, grpc_closure *on_done,
+    grpc_resolved_addresses **addresses) = resolve_address_impl;
 
 #endif
diff --git a/src/core/lib/iomgr/resource_quota.c b/src/core/lib/iomgr/resource_quota.c
index bfc905845d..213d29600c 100644
--- a/src/core/lib/iomgr/resource_quota.c
+++ b/src/core/lib/iomgr/resource_quota.c
@@ -44,6 +44,84 @@
 
 int grpc_resource_quota_trace = 0;
 
+/* Internal linked list pointers for a resource user */
+typedef struct {
+  grpc_resource_user *next;
+  grpc_resource_user *prev;
+} grpc_resource_user_link;
+
+/* Resource users are kept in (potentially) several intrusive linked lists
+   at once. These are the list names. */
+typedef enum {
+  /* Resource users that are waiting for an allocation */
+  GRPC_RULIST_AWAITING_ALLOCATION,
+  /* Resource users that have free memory available for internal reclamation */
+  GRPC_RULIST_NON_EMPTY_FREE_POOL,
+  /* Resource users that have published a benign reclamation is available */
+  GRPC_RULIST_RECLAIMER_BENIGN,
+  /* Resource users that have published a destructive reclamation is
+     available */
+  GRPC_RULIST_RECLAIMER_DESTRUCTIVE,
+  /* Number of lists: must be last */
+  GRPC_RULIST_COUNT
+} grpc_rulist;
+
+struct grpc_resource_user {
+  /* The quota this resource user consumes from */
+  grpc_resource_quota *resource_quota;
+
+  /* Closure to schedule an allocation under the resource quota combiner lock */
+  grpc_closure allocate_closure;
+  /* Closure to publish a non empty free pool under the resource quota combiner
+     lock */
+  grpc_closure add_to_free_pool_closure;
+
+  /* one ref for each ref call (released by grpc_resource_user_unref), and one
+     ref for each byte allocated (released by grpc_resource_user_free) */
+  gpr_atm refs;
+  /* is this resource user unlocked? starts at 0, increases for each shutdown
+     call */
+  gpr_atm shutdown;
+
+  gpr_mu mu;
+  /* The amount of memory (in bytes) this user has cached for its own use: to
+     avoid quota contention, each resource user can keep some memory in
+     addition to what it is immediately using (e.g., for caching), and the quota
+     can pull it back under memory pressure.
+     This value can become negative if more memory has been requested than
+     existed in the free pool, at which point the quota is consulted to bring
+     this value non-negative (asynchronously). */
+  int64_t free_pool;
+  /* A list of closures to call once free_pool becomes non-negative - ie when
+     all outstanding allocations have been granted. */
+  grpc_closure_list on_allocated;
+  /* True if we are currently trying to allocate from the quota, false if not */
+  bool allocating;
+  /* True if we are currently trying to add ourselves to the non-free quota
+     list, false otherwise */
+  bool added_to_free_pool;
+
+  /* Reclaimers: index 0 is the benign reclaimer, 1 is the destructive reclaimer
+   */
+  grpc_closure *reclaimers[2];
+  /* Reclaimers just posted: once we're in the combiner lock, we'll move them
+     to the array above */
+  grpc_closure *new_reclaimers[2];
+  /* Trampoline closures to finish reclamation and re-enter the quota combiner
+     lock */
+  grpc_closure post_reclaimer_closure[2];
+
+  /* Closure to execute under the quota combiner to de-register and shutdown the
+     resource user */
+  grpc_closure destroy_closure;
+
+  /* Links in the various grpc_rulist lists */
+  grpc_resource_user_link links[GRPC_RULIST_COUNT];
+
+  /* The name of this resource user, for debugging/tracing */
+  char *name;
+};
+
 struct grpc_resource_quota {
   /* refcount */
   gpr_refcount refs;
@@ -66,6 +144,12 @@ struct grpc_resource_quota {
   /* Closure around rq_reclamation_done */
   grpc_closure rq_reclamation_done_closure;
 
+  /* This is only really usable for debugging: it's always a stale pointer, but
+     a stale pointer that might just be fresh enough to guide us to where the
+     reclamation system is stuck */
+  grpc_closure *debug_only_last_initiated_reclaimer;
+  grpc_resource_user *debug_only_last_reclaimer_resource_user;
+
   /* Roots of all resource user lists */
   grpc_resource_user *roots[GRPC_RULIST_COUNT];
 
@@ -147,6 +231,7 @@ static void rulist_remove(grpc_resource_user *resource_user, grpc_rulist list) {
       resource_user->links[list].prev;
   resource_user->links[list].prev->links[list].next =
       resource_user->links[list].next;
+  resource_user->links[list].next = resource_user->links[list].prev = NULL;
 }
 
 /*******************************************************************************
@@ -166,8 +251,11 @@ static void rq_step(grpc_exec_ctx *exec_ctx, void *rq, grpc_error *error) {
   do {
     if (rq_alloc(exec_ctx, resource_quota)) goto done;
   } while (rq_reclaim_from_per_user_free_pool(exec_ctx, resource_quota));
-  rq_reclaim(exec_ctx, resource_quota, false) ||
-      rq_reclaim(exec_ctx, resource_quota, true);
+
+  if (!rq_reclaim(exec_ctx, resource_quota, false)) {
+    rq_reclaim(exec_ctx, resource_quota, true);
+  }
+
 done:
   grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
 }
@@ -259,6 +347,9 @@ static bool rq_reclaim(grpc_exec_ctx *exec_ctx,
   resource_quota->reclaiming = true;
   grpc_resource_quota_internal_ref(resource_quota);
   grpc_closure *c = resource_user->reclaimers[destructive];
+  GPR_ASSERT(c);
+  resource_quota->debug_only_last_reclaimer_resource_user = resource_user;
+  resource_quota->debug_only_last_initiated_reclaimer = c;
   resource_user->reclaimers[destructive] = NULL;
   grpc_closure_run(exec_ctx, c, GRPC_ERROR_NONE);
   return true;
@@ -269,7 +360,7 @@ static bool rq_reclaim(grpc_exec_ctx *exec_ctx,
  */
 
 typedef struct {
-  gpr_slice_refcount base;
+  grpc_slice_refcount base;
   gpr_refcount refs;
   grpc_resource_user *resource_user;
   size_t size;
@@ -286,7 +377,7 @@ static void ru_slice_unref(void *p) {
     /* TODO(ctiller): this is dangerous, but I think safe for now:
        we have no guarantee here that we're at a safe point for creating an
        execution context, but we have no way of writing this code otherwise.
-       In the future: consider lifting gpr_slice to grpc, and offering an
+       In the future: consider lifting grpc_slice to grpc, and offering an
        internal_{ref,unref} pair that is execution context aware.
        Alternatively,
        make exec_ctx be thread local and 'do the right thing' (whatever that
@@ -299,15 +390,15 @@ static void ru_slice_unref(void *p) {
   }
 }
 
-static gpr_slice ru_slice_create(grpc_resource_user *resource_user,
-                                 size_t size) {
+static grpc_slice ru_slice_create(grpc_resource_user *resource_user,
+                                  size_t size) {
   ru_slice_refcount *rc = gpr_malloc(sizeof(ru_slice_refcount) + size);
   rc->base.ref = ru_slice_ref;
   rc->base.unref = ru_slice_unref;
   gpr_ref_init(&rc->refs, 1);
   rc->resource_user = resource_user;
   rc->size = size;
-  gpr_slice slice;
+  grpc_slice slice;
   slice.refcount = &rc->base;
   slice.data.refcounted.bytes = (uint8_t *)(rc + 1);
   slice.data.refcounted.length = size;
@@ -340,9 +431,25 @@ static void ru_add_to_free_pool(grpc_exec_ctx *exec_ctx, void *ru,
   rulist_add_tail(resource_user, GRPC_RULIST_NON_EMPTY_FREE_POOL);
 }
 
+static bool ru_post_reclaimer(grpc_exec_ctx *exec_ctx,
+                              grpc_resource_user *resource_user,
+                              bool destructive) {
+  grpc_closure *closure = resource_user->new_reclaimers[destructive];
+  GPR_ASSERT(closure != NULL);
+  resource_user->new_reclaimers[destructive] = NULL;
+  GPR_ASSERT(resource_user->reclaimers[destructive] == NULL);
+  if (gpr_atm_acq_load(&resource_user->shutdown) > 0) {
+    grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_CANCELLED, NULL);
+    return false;
+  }
+  resource_user->reclaimers[destructive] = closure;
+  return true;
+}
+
 static void ru_post_benign_reclaimer(grpc_exec_ctx *exec_ctx, void *ru,
                                      grpc_error *error) {
   grpc_resource_user *resource_user = ru;
+  if (!ru_post_reclaimer(exec_ctx, resource_user, false)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
@@ -357,6 +464,7 @@ static void ru_post_benign_reclaimer(grpc_exec_ctx *exec_ctx, void *ru,
 static void ru_post_destructive_reclaimer(grpc_exec_ctx *exec_ctx, void *ru,
                                           grpc_error *error) {
   grpc_resource_user *resource_user = ru;
+  if (!ru_post_reclaimer(exec_ctx, resource_user, true)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
@@ -370,9 +478,21 @@ static void ru_post_destructive_reclaimer(grpc_exec_ctx *exec_ctx, void *ru,
   rulist_add_tail(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
 }
 
+static void ru_shutdown(grpc_exec_ctx *exec_ctx, void *ru, grpc_error *error) {
+  grpc_resource_user *resource_user = ru;
+  grpc_exec_ctx_sched(exec_ctx, resource_user->reclaimers[0],
+                      GRPC_ERROR_CANCELLED, NULL);
+  grpc_exec_ctx_sched(exec_ctx, resource_user->reclaimers[1],
+                      GRPC_ERROR_CANCELLED, NULL);
+  resource_user->reclaimers[0] = NULL;
+  resource_user->reclaimers[1] = NULL;
+  rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_BENIGN);
+  rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
+}
+
 static void ru_destroy(grpc_exec_ctx *exec_ctx, void *ru, grpc_error *error) {
   grpc_resource_user *resource_user = ru;
-  GPR_ASSERT(resource_user->allocated == 0);
+  GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->refs) == 0);
   for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
     rulist_remove(resource_user, (grpc_rulist)i);
   }
@@ -380,13 +500,14 @@ static void ru_destroy(grpc_exec_ctx *exec_ctx, void *ru, grpc_error *error) {
                       GRPC_ERROR_CANCELLED, NULL);
   grpc_exec_ctx_sched(exec_ctx, resource_user->reclaimers[1],
                       GRPC_ERROR_CANCELLED, NULL);
-  grpc_exec_ctx_sched(exec_ctx, (grpc_closure *)gpr_atm_no_barrier_load(
-                                    &resource_user->on_done_destroy_closure),
-                      GRPC_ERROR_NONE, NULL);
   if (resource_user->free_pool != 0) {
     resource_user->resource_quota->free_pool += resource_user->free_pool;
     rq_step_sched(exec_ctx, resource_user->resource_quota);
   }
+  grpc_resource_quota_internal_unref(exec_ctx, resource_user->resource_quota);
+  gpr_mu_destroy(&resource_user->mu);
+  gpr_free(resource_user->name);
+  gpr_free(resource_user);
 }
 
 static void ru_allocated_slices(grpc_exec_ctx *exec_ctx, void *arg,
@@ -394,7 +515,7 @@ static void ru_allocated_slices(grpc_exec_ctx *exec_ctx, void *arg,
   grpc_resource_user_slice_allocator *slice_allocator = arg;
   if (error == GRPC_ERROR_NONE) {
     for (size_t i = 0; i < slice_allocator->count; i++) {
-      gpr_slice_buffer_add_indexed(
+      grpc_slice_buffer_add_indexed(
           slice_allocator->dest, ru_slice_create(slice_allocator->resource_user,
                                                  slice_allocator->length));
     }
@@ -536,9 +657,9 @@ const grpc_arg_pointer_vtable *grpc_resource_quota_arg_vtable(void) {
  * grpc_resource_user api
  */
 
-void grpc_resource_user_init(grpc_resource_user *resource_user,
-                             grpc_resource_quota *resource_quota,
-                             const char *name) {
+grpc_resource_user *grpc_resource_user_create(
+    grpc_resource_quota *resource_quota, const char *name) {
+  grpc_resource_user *resource_user = gpr_malloc(sizeof(*resource_user));
   resource_user->resource_quota =
       grpc_resource_quota_internal_ref(resource_quota);
   grpc_closure_init(&resource_user->allocate_closure, &ru_allocate,
@@ -552,14 +673,16 @@ void grpc_resource_user_init(grpc_resource_user *resource_user,
   grpc_closure_init(&resource_user->destroy_closure, &ru_destroy,
                     resource_user);
   gpr_mu_init(&resource_user->mu);
-  resource_user->allocated = 0;
+  gpr_atm_rel_store(&resource_user->refs, 1);
+  gpr_atm_rel_store(&resource_user->shutdown, 0);
   resource_user->free_pool = 0;
   grpc_closure_list_init(&resource_user->on_allocated);
   resource_user->allocating = false;
   resource_user->added_to_free_pool = false;
-  gpr_atm_no_barrier_store(&resource_user->on_done_destroy_closure, 0);
   resource_user->reclaimers[0] = NULL;
   resource_user->reclaimers[1] = NULL;
+  resource_user->new_reclaimers[0] = NULL;
+  resource_user->new_reclaimers[1] = NULL;
   for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
     resource_user->links[i].next = resource_user->links[i].prev = NULL;
   }
@@ -569,56 +692,54 @@ void grpc_resource_user_init(grpc_resource_user *resource_user,
     gpr_asprintf(&resource_user->name, "anonymous_resource_user_%" PRIxPTR,
                  (intptr_t)resource_user);
   }
+  return resource_user;
 }
 
-void grpc_resource_user_shutdown(grpc_exec_ctx *exec_ctx,
-                                 grpc_resource_user *resource_user,
-                                 grpc_closure *on_done) {
-  gpr_mu_lock(&resource_user->mu);
-  GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->on_done_destroy_closure) ==
-             0);
-  gpr_atm_no_barrier_store(&resource_user->on_done_destroy_closure,
-                           (gpr_atm)on_done);
-  if (resource_user->allocated == 0) {
+static void ru_ref_by(grpc_resource_user *resource_user, gpr_atm amount) {
+  GPR_ASSERT(amount > 0);
+  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&resource_user->refs, amount) != 0);
+}
+
+static void ru_unref_by(grpc_exec_ctx *exec_ctx,
+                        grpc_resource_user *resource_user, gpr_atm amount) {
+  GPR_ASSERT(amount > 0);
+  gpr_atm old = gpr_atm_full_fetch_add(&resource_user->refs, -amount);
+  GPR_ASSERT(old >= amount);
+  if (old == amount) {
     grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
                           &resource_user->destroy_closure, GRPC_ERROR_NONE,
                           false);
   }
-  gpr_mu_unlock(&resource_user->mu);
 }
 
-void grpc_resource_user_destroy(grpc_exec_ctx *exec_ctx,
-                                grpc_resource_user *resource_user) {
-  grpc_resource_quota_internal_unref(exec_ctx, resource_user->resource_quota);
-  gpr_mu_destroy(&resource_user->mu);
-  gpr_free(resource_user->name);
+void grpc_resource_user_ref(grpc_resource_user *resource_user) {
+  ru_ref_by(resource_user, 1);
+}
+
+void grpc_resource_user_unref(grpc_exec_ctx *exec_ctx,
+                              grpc_resource_user *resource_user) {
+  ru_unref_by(exec_ctx, resource_user, 1);
+}
+
+void grpc_resource_user_shutdown(grpc_exec_ctx *exec_ctx,
+                                 grpc_resource_user *resource_user) {
+  if (gpr_atm_full_fetch_add(&resource_user->shutdown, 1) == 0) {
+    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
+                          grpc_closure_create(ru_shutdown, resource_user),
+                          GRPC_ERROR_NONE, false);
+  }
 }
 
 void grpc_resource_user_alloc(grpc_exec_ctx *exec_ctx,
                               grpc_resource_user *resource_user, size_t size,
                               grpc_closure *optional_on_done) {
   gpr_mu_lock(&resource_user->mu);
-  grpc_closure *on_done_destroy = (grpc_closure *)gpr_atm_no_barrier_load(
-      &resource_user->on_done_destroy_closure);
-  if (on_done_destroy != NULL) {
-    /* already shutdown */
-    if (grpc_resource_quota_trace) {
-      gpr_log(GPR_DEBUG, "RQ %s %s: alloc %" PRIdPTR " after shutdown",
-              resource_user->resource_quota->name, resource_user->name, size);
-    }
-    grpc_exec_ctx_sched(
-        exec_ctx, optional_on_done,
-        GRPC_ERROR_CREATE("Buffer pool user is already shutdown"), NULL);
-    gpr_mu_unlock(&resource_user->mu);
-    return;
-  }
-  resource_user->allocated += (int64_t)size;
+  ru_ref_by(resource_user, (gpr_atm)size);
   resource_user->free_pool -= (int64_t)size;
   if (grpc_resource_quota_trace) {
-    gpr_log(GPR_DEBUG, "RQ %s %s: alloc %" PRIdPTR "; allocated -> %" PRId64
-                       ", free_pool -> %" PRId64,
+    gpr_log(GPR_DEBUG, "RQ %s %s: alloc %" PRIdPTR "; free_pool -> %" PRId64,
             resource_user->resource_quota->name, resource_user->name, size,
-            resource_user->allocated, resource_user->free_pool);
+            resource_user->free_pool);
   }
   if (resource_user->free_pool < 0) {
     grpc_closure_list_append(&resource_user->on_allocated, optional_on_done,
@@ -638,15 +759,12 @@ void grpc_resource_user_alloc(grpc_exec_ctx *exec_ctx,
 void grpc_resource_user_free(grpc_exec_ctx *exec_ctx,
                              grpc_resource_user *resource_user, size_t size) {
   gpr_mu_lock(&resource_user->mu);
-  GPR_ASSERT(resource_user->allocated >= (int64_t)size);
   bool was_zero_or_negative = resource_user->free_pool <= 0;
   resource_user->free_pool += (int64_t)size;
-  resource_user->allocated -= (int64_t)size;
   if (grpc_resource_quota_trace) {
-    gpr_log(GPR_DEBUG, "RQ %s %s: free %" PRIdPTR "; allocated -> %" PRId64
-                       ", free_pool -> %" PRId64,
+    gpr_log(GPR_DEBUG, "RQ %s %s: free %" PRIdPTR "; free_pool -> %" PRId64,
             resource_user->resource_quota->name, resource_user->name, size,
-            resource_user->allocated, resource_user->free_pool);
+            resource_user->free_pool);
   }
   bool is_bigger_than_zero = resource_user->free_pool > 0;
   if (is_bigger_than_zero && was_zero_or_negative &&
@@ -656,29 +774,19 @@ void grpc_resource_user_free(grpc_exec_ctx *exec_ctx,
                           &resource_user->add_to_free_pool_closure,
                           GRPC_ERROR_NONE, false);
   }
-  grpc_closure *on_done_destroy = (grpc_closure *)gpr_atm_no_barrier_load(
-      &resource_user->on_done_destroy_closure);
-  if (on_done_destroy != NULL && resource_user->allocated == 0) {
-    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
-                          &resource_user->destroy_closure, GRPC_ERROR_NONE,
-                          false);
-  }
   gpr_mu_unlock(&resource_user->mu);
+  ru_unref_by(exec_ctx, resource_user, (gpr_atm)size);
 }
 
 void grpc_resource_user_post_reclaimer(grpc_exec_ctx *exec_ctx,
                                        grpc_resource_user *resource_user,
                                        bool destructive,
                                        grpc_closure *closure) {
-  if (gpr_atm_acq_load(&resource_user->on_done_destroy_closure) == 0) {
-    GPR_ASSERT(resource_user->reclaimers[destructive] == NULL);
-    resource_user->reclaimers[destructive] = closure;
-    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
-                          &resource_user->post_reclaimer_closure[destructive],
-                          GRPC_ERROR_NONE, false);
-  } else {
-    grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_CANCELLED, NULL);
-  }
+  GPR_ASSERT(resource_user->new_reclaimers[destructive] == NULL);
+  resource_user->new_reclaimers[destructive] = closure;
+  grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
+                        &resource_user->post_reclaimer_closure[destructive],
+                        GRPC_ERROR_NONE, false);
 }
 
 void grpc_resource_user_finish_reclamation(grpc_exec_ctx *exec_ctx,
@@ -705,10 +813,17 @@ void grpc_resource_user_slice_allocator_init(
 void grpc_resource_user_alloc_slices(
     grpc_exec_ctx *exec_ctx,
     grpc_resource_user_slice_allocator *slice_allocator, size_t length,
-    size_t count, gpr_slice_buffer *dest) {
+    size_t count, grpc_slice_buffer *dest) {
   slice_allocator->length = length;
   slice_allocator->count = count;
   slice_allocator->dest = dest;
   grpc_resource_user_alloc(exec_ctx, slice_allocator->resource_user,
                            count * length, &slice_allocator->on_allocated);
 }
+
+grpc_slice grpc_resource_user_slice_malloc(grpc_exec_ctx *exec_ctx,
+                                           grpc_resource_user *resource_user,
+                                           size_t size) {
+  grpc_resource_user_alloc(exec_ctx, resource_user, size, NULL);
+  return ru_slice_create(resource_user, size);
+}
diff --git a/src/core/lib/iomgr/resource_quota.h b/src/core/lib/iomgr/resource_quota.h
index 6dfac55f88..0181fd978b 100644
--- a/src/core/lib/iomgr/resource_quota.h
+++ b/src/core/lib/iomgr/resource_quota.h
@@ -84,91 +84,15 @@ void grpc_resource_quota_internal_unref(grpc_exec_ctx *exec_ctx,
 grpc_resource_quota *grpc_resource_quota_from_channel_args(
     const grpc_channel_args *channel_args);
 
-/* Resource users are kept in (potentially) several intrusive linked lists
-   at once. These are the list names. */
-typedef enum {
-  /* Resource users that are waiting for an allocation */
-  GRPC_RULIST_AWAITING_ALLOCATION,
-  /* Resource users that have free memory available for internal reclamation */
-  GRPC_RULIST_NON_EMPTY_FREE_POOL,
-  /* Resource users that have published a benign reclamation is available */
-  GRPC_RULIST_RECLAIMER_BENIGN,
-  /* Resource users that have published a destructive reclamation is
-     available */
-  GRPC_RULIST_RECLAIMER_DESTRUCTIVE,
-  /* Number of lists: must be last */
-  GRPC_RULIST_COUNT
-} grpc_rulist;
-
 typedef struct grpc_resource_user grpc_resource_user;
 
-/* Internal linked list pointers for a resource user */
-typedef struct {
-  grpc_resource_user *next;
-  grpc_resource_user *prev;
-} grpc_resource_user_link;
-
-struct grpc_resource_user {
-  /* The quota this resource user consumes from */
-  grpc_resource_quota *resource_quota;
-
-  /* Closure to schedule an allocation under the resource quota combiner lock */
-  grpc_closure allocate_closure;
-  /* Closure to publish a non empty free pool under the resource quota combiner
-     lock */
-  grpc_closure add_to_free_pool_closure;
-
-  gpr_mu mu;
-  /* Total allocated memory outstanding by this resource user in bytes;
-     always positive */
-  int64_t allocated;
-  /* The amount of memory (in bytes) this user has cached for its own use: to
-     avoid quota contention, each resource user can keep some memory in
-     addition to what it is immediately using (e.g., for caching), and the quota
-     can pull it back under memory pressure.
-     This value can become negative if more memory has been requested than
-     existed in the free pool, at which point the quota is consulted to bring
-     this value non-negative (asynchronously). */
-  int64_t free_pool;
-  /* A list of closures to call once free_pool becomes non-negative - ie when
-     all outstanding allocations have been granted. */
-  grpc_closure_list on_allocated;
-  /* True if we are currently trying to allocate from the quota, false if not */
-  bool allocating;
-  /* True if we are currently trying to add ourselves to the non-free quota
-     list, false otherwise */
-  bool added_to_free_pool;
-
-  /* Reclaimers: index 0 is the benign reclaimer, 1 is the destructive reclaimer
-   */
-  grpc_closure *reclaimers[2];
-  /* Trampoline closures to finish reclamation and re-enter the quota combiner
-     lock */
-  grpc_closure post_reclaimer_closure[2];
-
-  /* Closure to execute under the quota combiner to de-register and shutdown the
-     resource user */
-  grpc_closure destroy_closure;
-  /* User supplied closure to call once the user has finished shutting down AND
-     all outstanding allocations have been freed. Real type is grpc_closure*,
-     but it's stored as an atomic to avoid a mutex on some fast paths. */
-  gpr_atm on_done_destroy_closure;
-
-  /* Links in the various grpc_rulist lists */
-  grpc_resource_user_link links[GRPC_RULIST_COUNT];
-
-  /* The name of this resource user, for debugging/tracing */
-  char *name;
-};
-
-void grpc_resource_user_init(grpc_resource_user *resource_user,
-                             grpc_resource_quota *resource_quota,
-                             const char *name);
+grpc_resource_user *grpc_resource_user_create(
+    grpc_resource_quota *resource_quota, const char *name);
+void grpc_resource_user_ref(grpc_resource_user *resource_user);
+void grpc_resource_user_unref(grpc_exec_ctx *exec_ctx,
+                              grpc_resource_user *resource_user);
 void grpc_resource_user_shutdown(grpc_exec_ctx *exec_ctx,
-                                 grpc_resource_user *resource_user,
-                                 grpc_closure *on_done);
-void grpc_resource_user_destroy(grpc_exec_ctx *exec_ctx,
-                                grpc_resource_user *resource_user);
+                                 grpc_resource_user *resource_user);
 
 /* Allocate from the resource user (and its quota).
    If optional_on_done is NULL, then allocate immediately. This may push the
@@ -203,7 +127,7 @@ typedef struct grpc_resource_user_slice_allocator {
   /* Number of slices to allocate on the current request */
   size_t count;
   /* Destination for slices to allocate on the current request */
-  gpr_slice_buffer *dest;
+  grpc_slice_buffer *dest;
   /* Parent resource user */
   grpc_resource_user *resource_user;
 } grpc_resource_user_slice_allocator;
@@ -219,6 +143,11 @@ void grpc_resource_user_slice_allocator_init(
 void grpc_resource_user_alloc_slices(
     grpc_exec_ctx *exec_ctx,
     grpc_resource_user_slice_allocator *slice_allocator, size_t length,
-    size_t count, gpr_slice_buffer *dest);
+    size_t count, grpc_slice_buffer *dest);
+
+/* Allocate one slice of length \a size synchronously. */
+grpc_slice grpc_resource_user_slice_malloc(grpc_exec_ctx *exec_ctx,
+                                           grpc_resource_user *resource_user,
+                                           size_t size);
 
 #endif /* GRPC_CORE_LIB_IOMGR_RESOURCE_QUOTA_H */
diff --git a/src/core/lib/iomgr/socket_mutator.c b/src/core/lib/iomgr/socket_mutator.c
new file mode 100644
index 0000000000..8b1efb6bab
--- /dev/null
+++ b/src/core/lib/iomgr/socket_mutator.c
@@ -0,0 +1,98 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/socket_mutator.h"
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/useful.h>
+
+void grpc_socket_mutator_init(grpc_socket_mutator *mutator,
+                              const grpc_socket_mutator_vtable *vtable) {
+  mutator->vtable = vtable;
+  gpr_ref_init(&mutator->refcount, 1);
+}
+
+grpc_socket_mutator *grpc_socket_mutator_ref(grpc_socket_mutator *mutator) {
+  gpr_ref(&mutator->refcount);
+  return mutator;
+}
+
+bool grpc_socket_mutator_mutate_fd(grpc_socket_mutator *mutator, int fd) {
+  return mutator->vtable->mutate_fd(fd, mutator);
+}
+
+int grpc_socket_mutator_compare(grpc_socket_mutator *a,
+                                grpc_socket_mutator *b) {
+  int c = GPR_ICMP(a, b);
+  if (c != 0) {
+    grpc_socket_mutator *sma = a;
+    grpc_socket_mutator *smb = b;
+    c = GPR_ICMP(sma->vtable, smb->vtable);
+    if (c == 0) {
+      c = sma->vtable->compare(sma, smb);
+    }
+  }
+  return c;
+}
+
+void grpc_socket_mutator_unref(grpc_socket_mutator *mutator) {
+  if (gpr_unref(&mutator->refcount)) {
+    mutator->vtable->destory(mutator);
+  }
+}
+
+static void *socket_mutator_arg_copy(void *p) {
+  return grpc_socket_mutator_ref(p);
+}
+
+static void socket_mutator_arg_destroy(void *p) {
+  grpc_socket_mutator_unref(p);
+}
+
+static int socket_mutator_cmp(void *a, void *b) {
+  return grpc_socket_mutator_compare((grpc_socket_mutator *)a,
+                                     (grpc_socket_mutator *)b);
+}
+
+static const grpc_arg_pointer_vtable socket_mutator_arg_vtable = {
+    socket_mutator_arg_copy, socket_mutator_arg_destroy, socket_mutator_cmp};
+
+grpc_arg grpc_socket_mutator_to_arg(grpc_socket_mutator *mutator) {
+  grpc_arg arg;
+  arg.type = GRPC_ARG_POINTER;
+  arg.key = GRPC_ARG_SOCKET_MUTATOR;
+  arg.value.pointer.vtable = &socket_mutator_arg_vtable;
+  arg.value.pointer.p = mutator;
+  return arg;
+}
diff --git a/src/core/lib/iomgr/socket_mutator.h b/src/core/lib/iomgr/socket_mutator.h
new file mode 100644
index 0000000000..2f5b6c248e
--- /dev/null
+++ b/src/core/lib/iomgr/socket_mutator.h
@@ -0,0 +1,80 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKET_MUTATOR_H
+#define GRPC_CORE_LIB_IOMGR_SOCKET_MUTATOR_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/sync.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** The virtual table of grpc_socket_mutator */
+typedef struct {
+  /** Mutates the socket opitons of \a fd */
+  bool (*mutate_fd)(int fd, grpc_socket_mutator *mutator);
+  /** Compare socket mutator \a a and \a b */
+  int (*compare)(grpc_socket_mutator *a, grpc_socket_mutator *b);
+  /** Destroys the socket mutator instance */
+  void (*destory)(grpc_socket_mutator *mutator);
+} grpc_socket_mutator_vtable;
+
+/** The Socket Mutator interface allows changes on socket options */
+struct grpc_socket_mutator {
+  const grpc_socket_mutator_vtable *vtable;
+  gpr_refcount refcount;
+};
+
+/** called by concrete implementations to initialize the base struct */
+void grpc_socket_mutator_init(grpc_socket_mutator *mutator,
+                              const grpc_socket_mutator_vtable *vtable);
+
+/** Wrap \a mutator as a grpc_arg */
+grpc_arg grpc_socket_mutator_to_arg(grpc_socket_mutator *mutator);
+
+/** Perform the file descriptor mutation operation of \a mutator on \a fd */
+bool grpc_socket_mutator_mutate_fd(grpc_socket_mutator *mutator, int fd);
+
+/** Compare if \a a and \a b are the same mutator or have same settings */
+int grpc_socket_mutator_compare(grpc_socket_mutator *a, grpc_socket_mutator *b);
+
+grpc_socket_mutator *grpc_socket_mutator_ref(grpc_socket_mutator *mutator);
+void grpc_socket_mutator_unref(grpc_socket_mutator *mutator);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKET_MUTATOR_H */
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
index bc28bbe316..88e9ade253 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.c
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -209,6 +209,15 @@ grpc_error *grpc_set_socket_low_latency(int fd, int low_latency) {
   return GRPC_ERROR_NONE;
 }
 
+/* set a socket using a grpc_socket_mutator */
+grpc_error *grpc_set_socket_with_mutator(int fd, grpc_socket_mutator *mutator) {
+  GPR_ASSERT(mutator);
+  if (!grpc_socket_mutator_mutate_fd(mutator, fd)) {
+    return GRPC_ERROR_CREATE("grpc_socket_mutator failed.");
+  }
+  return GRPC_ERROR_NONE;
+}
+
 static gpr_once g_probe_ipv6_once = GPR_ONCE_INIT;
 static int g_ipv6_loopback_available;
 
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
index 175fb2b717..e84d3781a1 100644
--- a/src/core/lib/iomgr/socket_utils_posix.h
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -39,7 +39,9 @@
 #include <sys/socket.h>
 #include <unistd.h>
 
+#include <grpc/impl/codegen/grpc_types.h>
 #include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/socket_mutator.h"
 
 /* a wrapper for accept or accept4 */
 int grpc_accept4(int sockfd, grpc_resolved_address *resolved_addr, int nonblock,
@@ -88,6 +90,9 @@ grpc_error *grpc_set_socket_sndbuf(int fd, int buffer_size_bytes);
 /* Tries to set the socket's receive buffer to given size. */
 grpc_error *grpc_set_socket_rcvbuf(int fd, int buffer_size_bytes);
 
+/* Tries to set the socket using a grpc_socket_mutator */
+grpc_error *grpc_set_socket_with_mutator(int fd, grpc_socket_mutator *mutator);
+
 /* An enum to keep track of IPv4/IPv6 socket modes.
 
    Currently, this information is only used when a socket is first created, but
diff --git a/src/core/lib/iomgr/socket_windows.c b/src/core/lib/iomgr/socket_windows.c
index 35f23300dc..54911e0e31 100644
--- a/src/core/lib/iomgr/socket_windows.c
+++ b/src/core/lib/iomgr/socket_windows.c
@@ -76,6 +76,14 @@ void grpc_winsocket_shutdown(grpc_winsocket *winsocket) {
   LPFN_DISCONNECTEX DisconnectEx;
   DWORD ioctl_num_bytes;
 
+  gpr_mu_lock(&winsocket->state_mu);
+  if (winsocket->shutdown_called) {
+    gpr_mu_unlock(&winsocket->state_mu);
+    return;
+  }
+  winsocket->shutdown_called = true;
+  gpr_mu_unlock(&winsocket->state_mu);
+
   status = WSAIoctl(winsocket->socket, SIO_GET_EXTENSION_FUNCTION_POINTER,
                     &guid, sizeof(guid), &DisconnectEx, sizeof(DisconnectEx),
                     &ioctl_num_bytes, NULL, NULL);
diff --git a/src/core/lib/iomgr/socket_windows.h b/src/core/lib/iomgr/socket_windows.h
index 490d0e0a06..a3875ce16c 100644
--- a/src/core/lib/iomgr/socket_windows.h
+++ b/src/core/lib/iomgr/socket_windows.h
@@ -87,6 +87,7 @@ typedef struct grpc_winsocket {
   grpc_winsocket_callback_info read_info;
 
   gpr_mu state_mu;
+  bool shutdown_called;
 
   /* You can't add the same socket twice to the same IO Completion Port.
      This prevents that. */
diff --git a/src/core/lib/iomgr/tcp_client.h b/src/core/lib/iomgr/tcp_client.h
index 18e6e60ebc..0485661316 100644
--- a/src/core/lib/iomgr/tcp_client.h
+++ b/src/core/lib/iomgr/tcp_client.h
@@ -34,6 +34,7 @@
 #ifndef GRPC_CORE_LIB_IOMGR_TCP_CLIENT_H
 #define GRPC_CORE_LIB_IOMGR_TCP_CLIENT_H
 
+#include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/support/time.h>
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/pollset_set.h"
diff --git a/src/core/lib/iomgr/tcp_client_posix.c b/src/core/lib/iomgr/tcp_client_posix.c
index bc08c94ee0..a3a70a8ed7 100644
--- a/src/core/lib/iomgr/tcp_client_posix.c
+++ b/src/core/lib/iomgr/tcp_client_posix.c
@@ -51,6 +51,7 @@
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr_posix.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_mutator.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "src/core/lib/iomgr/tcp_posix.h"
 #include "src/core/lib/iomgr/timer.h"
@@ -73,7 +74,8 @@ typedef struct {
   grpc_channel_args *channel_args;
 } async_connect;
 
-static grpc_error *prepare_socket(const grpc_resolved_address *addr, int fd) {
+static grpc_error *prepare_socket(const grpc_resolved_address *addr, int fd,
+                                  const grpc_channel_args *channel_args) {
   grpc_error *err = GRPC_ERROR_NONE;
 
   GPR_ASSERT(fd >= 0);
@@ -88,6 +90,16 @@ static grpc_error *prepare_socket(const grpc_resolved_address *addr, int fd) {
   }
   err = grpc_set_socket_no_sigpipe_if_possible(fd);
   if (err != GRPC_ERROR_NONE) goto error;
+  if (channel_args) {
+    for (size_t i = 0; i < channel_args->num_args; i++) {
+      if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_SOCKET_MUTATOR)) {
+        GPR_ASSERT(channel_args->args[i].type == GRPC_ARG_POINTER);
+        grpc_socket_mutator *mutator = channel_args->args[i].value.pointer.p;
+        err = grpc_set_socket_with_mutator(fd, mutator);
+        if (err != GRPC_ERROR_NONE) goto error;
+      }
+    }
+  }
   goto done;
 
 error:
@@ -239,8 +251,11 @@ finish:
   done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (error != GRPC_ERROR_NONE) {
-    error = grpc_error_set_str(error, GRPC_ERROR_STR_DESCRIPTION,
-                               "Failed to connect to remote host");
+    char *error_descr;
+    gpr_asprintf(&error_descr, "Failed to connect to remote host: %s",
+                 grpc_error_get_str(error, GRPC_ERROR_STR_DESCRIPTION));
+    error = grpc_error_set_str(error, GRPC_ERROR_STR_DESCRIPTION, error_descr);
+    gpr_free(error_descr);
     error =
         grpc_error_set_str(error, GRPC_ERROR_STR_TARGET_ADDRESS, ac->addr_str);
   }
@@ -287,7 +302,7 @@ static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
     GPR_ASSERT(grpc_sockaddr_is_v4mapped(addr, &addr4_copy));
     addr = &addr4_copy;
   }
-  if ((error = prepare_socket(addr, fd)) != GRPC_ERROR_NONE) {
+  if ((error = prepare_socket(addr, fd, channel_args)) != GRPC_ERROR_NONE) {
     grpc_exec_ctx_sched(exec_ctx, closure, error, NULL);
     return;
   }
diff --git a/src/core/lib/iomgr/tcp_client_uv.c b/src/core/lib/iomgr/tcp_client_uv.c
index 6274667042..b07f9ceffa 100644
--- a/src/core/lib/iomgr/tcp_client_uv.c
+++ b/src/core/lib/iomgr/tcp_client_uv.c
@@ -54,9 +54,12 @@ typedef struct grpc_uv_tcp_connect {
   grpc_endpoint **endpoint;
   int refs;
   char *addr_name;
+  grpc_resource_quota *resource_quota;
 } grpc_uv_tcp_connect;
 
-static void uv_tcp_connect_cleanup(grpc_uv_tcp_connect *connect) {
+static void uv_tcp_connect_cleanup(grpc_exec_ctx *exec_ctx,
+                                   grpc_uv_tcp_connect *connect) {
+  grpc_resource_quota_internal_unref(exec_ctx, connect->resource_quota);
   gpr_free(connect);
 }
 
@@ -74,7 +77,7 @@ static void uv_tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp,
   }
   done = (--connect->refs == 0);
   if (done) {
-    uv_tcp_connect_cleanup(connect);
+    uv_tcp_connect_cleanup(exec_ctx, connect);
   }
 }
 
@@ -86,8 +89,8 @@ static void uv_tc_on_connect(uv_connect_t *req, int status) {
   grpc_closure *closure = connect->closure;
   grpc_timer_cancel(&exec_ctx, &connect->alarm);
   if (status == 0) {
-    *connect->endpoint =
-        grpc_tcp_create(connect->tcp_handle, connect->addr_name);
+    *connect->endpoint = grpc_tcp_create(
+        connect->tcp_handle, connect->resource_quota, connect->addr_name);
   } else {
     error = GRPC_ERROR_CREATE("Failed to connect to remote host");
     error = grpc_error_set_int(error, GRPC_ERROR_INT_ERRNO, -status);
@@ -105,7 +108,7 @@ static void uv_tc_on_connect(uv_connect_t *req, int status) {
   }
   done = (--connect->refs == 0);
   if (done) {
-    uv_tcp_connect_cleanup(connect);
+    uv_tcp_connect_cleanup(&exec_ctx, connect);
   }
   grpc_exec_ctx_sched(&exec_ctx, closure, error, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -114,16 +117,31 @@ static void uv_tc_on_connect(uv_connect_t *req, int status) {
 static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
                                     grpc_closure *closure, grpc_endpoint **ep,
                                     grpc_pollset_set *interested_parties,
+                                    const grpc_channel_args *channel_args,
                                     const grpc_resolved_address *resolved_addr,
                                     gpr_timespec deadline) {
   grpc_uv_tcp_connect *connect;
+  grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
+  (void)channel_args;
   (void)interested_parties;
+
+  if (channel_args != NULL) {
+    for (size_t i = 0; i < channel_args->num_args; i++) {
+      if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
+        grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
+        resource_quota = grpc_resource_quota_internal_ref(
+            channel_args->args[i].value.pointer.p);
+      }
+    }
+  }
+
   connect = gpr_malloc(sizeof(grpc_uv_tcp_connect));
   memset(connect, 0, sizeof(grpc_uv_tcp_connect));
   connect->closure = closure;
   connect->endpoint = ep;
   connect->tcp_handle = gpr_malloc(sizeof(uv_tcp_t));
   connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
+  connect->resource_quota = resource_quota;
   uv_tcp_init(uv_default_loop(), connect->tcp_handle);
   connect->connect_req.data = connect;
   // TODO(murgatroid99): figure out what the return value here means
@@ -138,16 +156,18 @@ static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
     grpc_exec_ctx *exec_ctx, grpc_closure *closure, grpc_endpoint **ep,
-    grpc_pollset_set *interested_parties, const grpc_resolved_address *addr,
+    grpc_pollset_set *interested_parties, const grpc_channel_args *channel_args,
+    const grpc_resolved_address *addr,
     gpr_timespec deadline) = tcp_client_connect_impl;
 
 void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
                              grpc_endpoint **ep,
                              grpc_pollset_set *interested_parties,
+                             const grpc_channel_args *channel_args,
                              const grpc_resolved_address *addr,
                              gpr_timespec deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties, addr,
-                               deadline);
+  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
+                               channel_args, addr, deadline);
 }
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/tcp_client_windows.c b/src/core/lib/iomgr/tcp_client_windows.c
index fdd8c1a1f8..1127588ebc 100644
--- a/src/core/lib/iomgr/tcp_client_windows.c
+++ b/src/core/lib/iomgr/tcp_client_windows.c
@@ -37,12 +37,13 @@
 
 #include "src/core/lib/iomgr/sockaddr_windows.h"
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/log_windows.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/iocp_windows.h"
 #include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
@@ -61,13 +62,16 @@ typedef struct {
   int refs;
   grpc_closure on_connect;
   grpc_endpoint **endpoint;
+  grpc_resource_quota *resource_quota;
 } async_connect;
 
-static void async_connect_unlock_and_cleanup(async_connect *ac,
+static void async_connect_unlock_and_cleanup(grpc_exec_ctx *exec_ctx,
+                                             async_connect *ac,
                                              grpc_winsocket *socket) {
   int done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (done) {
+    grpc_resource_quota_internal_unref(exec_ctx, ac->resource_quota);
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_name);
     gpr_free(ac);
@@ -83,7 +87,7 @@ static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, grpc_error *error) {
   if (socket != NULL) {
     grpc_winsocket_shutdown(socket);
   }
-  async_connect_unlock_and_cleanup(ac, socket);
+  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
 }
 
 static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, grpc_error *error) {
@@ -103,22 +107,26 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, grpc_error *error) {
 
   gpr_mu_lock(&ac->mu);
 
-  if (error == GRPC_ERROR_NONE && socket != NULL) {
-    DWORD transfered_bytes = 0;
-    DWORD flags;
-    BOOL wsa_success =
-        WSAGetOverlappedResult(socket->socket, &socket->write_info.overlapped,
-                               &transfered_bytes, FALSE, &flags);
-    GPR_ASSERT(transfered_bytes == 0);
-    if (!wsa_success) {
-      error = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx");
+  if (error == GRPC_ERROR_NONE) {
+    if (socket != NULL) {
+      DWORD transfered_bytes = 0;
+      DWORD flags;
+      BOOL wsa_success =
+          WSAGetOverlappedResult(socket->socket, &socket->write_info.overlapped,
+                                 &transfered_bytes, FALSE, &flags);
+      GPR_ASSERT(transfered_bytes == 0);
+      if (!wsa_success) {
+        error = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx");
+      } else {
+        *ep = grpc_tcp_create(socket, ac->resource_quota, ac->addr_name);
+        socket = NULL;
+      }
     } else {
-      *ep = grpc_tcp_create(socket, ac->addr_name);
-      socket = NULL;
+      error = GRPC_ERROR_CREATE("socket is null");
     }
   }
 
-  async_connect_unlock_and_cleanup(ac, socket);
+  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
   /* If the connection was aborted, the callback was already called when
      the deadline was met. */
   grpc_exec_ctx_sched(exec_ctx, on_done, error, NULL);
@@ -129,6 +137,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, grpc_error *error) {
 void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
                              grpc_endpoint **endpoint,
                              grpc_pollset_set *interested_parties,
+                             const grpc_channel_args *channel_args,
                              const grpc_resolved_address *addr,
                              gpr_timespec deadline) {
   SOCKET sock = INVALID_SOCKET;
@@ -144,6 +153,17 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
   grpc_winsocket_callback_info *info;
   grpc_error *error = GRPC_ERROR_NONE;
 
+  grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
+  if (channel_args != NULL) {
+    for (size_t i = 0; i < channel_args->num_args; i++) {
+      if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
+        grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
+        resource_quota = grpc_resource_quota_internal_ref(
+            channel_args->args[i].value.pointer.p);
+      }
+    }
+  }
+
   *endpoint = NULL;
 
   /* Use dualstack sockets where available. */
@@ -177,8 +197,8 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
 
   grpc_sockaddr_make_wildcard6(0, &local_address);
 
-  status =
-      bind(sock, (struct sockaddr *)&local_address.addr, local_address.len);
+  status = bind(sock, (struct sockaddr *)&local_address.addr,
+                (int)local_address.len);
   if (status != 0) {
     error = GRPC_WSA_ERROR(WSAGetLastError(), "bind");
     goto failure;
@@ -206,6 +226,7 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
   ac->refs = 2;
   ac->addr_name = grpc_sockaddr_to_uri(addr);
   ac->endpoint = endpoint;
+  ac->resource_quota = resource_quota;
   grpc_closure_init(&ac->on_connect, on_connect, ac);
 
   grpc_timer_init(exec_ctx, &ac->alarm, deadline, on_alarm, ac,
@@ -225,6 +246,7 @@ failure:
   } else if (sock != INVALID_SOCKET) {
     closesocket(sock);
   }
+  grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
   grpc_exec_ctx_sched(exec_ctx, on_done, final_error, NULL);
 }
 
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index 880af93ee1..540305e4fa 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -46,9 +46,9 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
@@ -56,6 +56,7 @@
 #include "src/core/lib/debug/trace.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 #ifdef GRPC_HAVE_MSG_NOSIGNAL
@@ -83,10 +84,10 @@ typedef struct {
   gpr_atm shutdown_count;
 
   /* garbage after the last read */
-  gpr_slice_buffer last_read_buffer;
+  grpc_slice_buffer last_read_buffer;
 
-  gpr_slice_buffer *incoming_buffer;
-  gpr_slice_buffer *outgoing_buffer;
+  grpc_slice_buffer *incoming_buffer;
+  grpc_slice_buffer *outgoing_buffer;
   /** slice within outgoing_buffer to write next */
   size_t outgoing_slice_idx;
   /** byte within outgoing_buffer->slices[outgoing_slice_idx] to write next */
@@ -102,36 +103,32 @@ typedef struct {
 
   char *peer_string;
 
-  grpc_resource_user resource_user;
+  grpc_resource_user *resource_user;
   grpc_resource_user_slice_allocator slice_allocator;
 } grpc_tcp;
 
+static grpc_error *tcp_annotate_error(grpc_error *src_error, grpc_tcp *tcp) {
+  return grpc_error_set_str(
+      grpc_error_set_int(src_error, GRPC_ERROR_INT_FD, tcp->fd),
+      GRPC_ERROR_STR_TARGET_ADDRESS, tcp->peer_string);
+}
+
 static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
                             grpc_error *error);
 static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
                              grpc_error *error);
-static void tcp_unref_closure(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
-                              grpc_error *error);
-
-static void tcp_maybe_shutdown_resource_user(grpc_exec_ctx *exec_ctx,
-                                             grpc_tcp *tcp) {
-  if (gpr_atm_full_fetch_add(&tcp->shutdown_count, 1) == 0) {
-    grpc_resource_user_shutdown(exec_ctx, &tcp->resource_user,
-                                grpc_closure_create(tcp_unref_closure, tcp));
-  }
-}
 
 static void tcp_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
-  tcp_maybe_shutdown_resource_user(exec_ctx, tcp);
   grpc_fd_shutdown(exec_ctx, tcp->em_fd);
+  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
 }
 
 static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   grpc_fd_orphan(exec_ctx, tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
                  "tcp_unref_orphan");
-  gpr_slice_buffer_destroy(&tcp->last_read_buffer);
-  grpc_resource_user_destroy(exec_ctx, &tcp->resource_user);
+  grpc_slice_buffer_destroy(&tcp->last_read_buffer);
+  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
   gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }
@@ -168,16 +165,10 @@ static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
 static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
-static void tcp_unref_closure(grpc_exec_ctx *exec_ctx, void *arg,
-                              grpc_error *error) {
-  TCP_UNREF(exec_ctx, arg, "resource_user");
-}
-
 static void tcp_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp *tcp = (grpc_tcp *)ep;
-  tcp_maybe_shutdown_resource_user(exec_ctx, tcp);
-  gpr_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
+  grpc_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
   TCP_UNREF(exec_ctx, tcp, "destroy");
 }
 
@@ -191,8 +182,8 @@ static void call_read_cb(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
     gpr_log(GPR_DEBUG, "read: error=%s", str);
     grpc_error_free_string(str);
     for (i = 0; i < tcp->incoming_buffer->count; i++) {
-      char *dump = gpr_dump_slice(tcp->incoming_buffer->slices[i],
-                                  GPR_DUMP_HEX | GPR_DUMP_ASCII);
+      char *dump = grpc_dump_slice(tcp->incoming_buffer->slices[i],
+                                   GPR_DUMP_HEX | GPR_DUMP_ASCII);
       gpr_log(GPR_DEBUG, "READ %p (peer=%s): %s", tcp, tcp->peer_string, dump);
       gpr_free(dump);
     }
@@ -216,8 +207,8 @@ static void tcp_do_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   GPR_TIMER_BEGIN("tcp_continue_read", 0);
 
   for (i = 0; i < tcp->incoming_buffer->count; i++) {
-    iov[i].iov_base = GPR_SLICE_START_PTR(tcp->incoming_buffer->slices[i]);
-    iov[i].iov_len = GPR_SLICE_LENGTH(tcp->incoming_buffer->slices[i]);
+    iov[i].iov_base = GRPC_SLICE_START_PTR(tcp->incoming_buffer->slices[i]);
+    iov[i].iov_len = GRPC_SLICE_LENGTH(tcp->incoming_buffer->slices[i]);
   }
 
   msg.msg_name = NULL;
@@ -244,19 +235,21 @@ static void tcp_do_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
       /* We've consumed the edge, request a new one */
       grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure);
     } else {
-      gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
-      call_read_cb(exec_ctx, tcp, GRPC_OS_ERROR(errno, "recvmsg"));
+      grpc_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+      call_read_cb(exec_ctx, tcp,
+                   tcp_annotate_error(GRPC_OS_ERROR(errno, "recvmsg"), tcp));
       TCP_UNREF(exec_ctx, tcp, "read");
     }
   } else if (read_bytes == 0) {
     /* 0 read size ==> end of stream */
-    gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_CREATE("Socket closed"));
+    grpc_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+    call_read_cb(exec_ctx, tcp,
+                 tcp_annotate_error(GRPC_ERROR_CREATE("Socket closed"), tcp));
     TCP_UNREF(exec_ctx, tcp, "read");
   } else {
     GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length);
     if ((size_t)read_bytes < tcp->incoming_buffer->length) {
-      gpr_slice_buffer_trim_end(
+      grpc_slice_buffer_trim_end(
           tcp->incoming_buffer,
           tcp->incoming_buffer->length - (size_t)read_bytes,
           &tcp->last_read_buffer);
@@ -275,8 +268,8 @@ static void tcp_read_allocation_done(grpc_exec_ctx *exec_ctx, void *tcpp,
                                      grpc_error *error) {
   grpc_tcp *tcp = tcpp;
   if (error != GRPC_ERROR_NONE) {
-    gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
-    gpr_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
+    grpc_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
     call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
     TCP_UNREF(exec_ctx, tcp, "read");
   } else {
@@ -301,8 +294,8 @@ static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
   GPR_ASSERT(!tcp->finished_edge);
 
   if (error != GRPC_ERROR_NONE) {
-    gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
-    gpr_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
+    grpc_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
     call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
     TCP_UNREF(exec_ctx, tcp, "read");
   } else {
@@ -311,13 +304,13 @@ static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
 }
 
 static void tcp_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                     gpr_slice_buffer *incoming_buffer, grpc_closure *cb) {
+                     grpc_slice_buffer *incoming_buffer, grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   GPR_ASSERT(tcp->read_cb == NULL);
   tcp->read_cb = cb;
   tcp->incoming_buffer = incoming_buffer;
-  gpr_slice_buffer_reset_and_unref(incoming_buffer);
-  gpr_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer);
+  grpc_slice_buffer_reset_and_unref(incoming_buffer);
+  grpc_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer);
   TCP_REF(tcp, "read");
   if (tcp->finished_edge) {
     tcp->finished_edge = false;
@@ -347,11 +340,11 @@ static bool tcp_flush(grpc_tcp *tcp, grpc_error **error) {
                        iov_size != MAX_WRITE_IOVEC;
          iov_size++) {
       iov[iov_size].iov_base =
-          GPR_SLICE_START_PTR(
+          GRPC_SLICE_START_PTR(
               tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) +
           tcp->outgoing_byte_idx;
       iov[iov_size].iov_len =
-          GPR_SLICE_LENGTH(
+          GRPC_SLICE_LENGTH(
               tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) -
           tcp->outgoing_byte_idx;
       sending_length += iov[iov_size].iov_len;
@@ -380,8 +373,13 @@ static bool tcp_flush(grpc_tcp *tcp, grpc_error **error) {
         tcp->outgoing_slice_idx = unwind_slice_idx;
         tcp->outgoing_byte_idx = unwind_byte_idx;
         return false;
+      } else if (errno == EPIPE) {
+        *error = grpc_error_set_int(GRPC_OS_ERROR(errno, "sendmsg"),
+                                    GRPC_ERROR_INT_GRPC_STATUS,
+                                    GRPC_STATUS_UNAVAILABLE);
+        return true;
       } else {
-        *error = GRPC_OS_ERROR(errno, "sendmsg");
+        *error = tcp_annotate_error(GRPC_OS_ERROR(errno, "sendmsg"), tcp);
         return true;
       }
     }
@@ -392,7 +390,7 @@ static bool tcp_flush(grpc_tcp *tcp, grpc_error **error) {
       size_t slice_length;
 
       tcp->outgoing_slice_idx--;
-      slice_length = GPR_SLICE_LENGTH(
+      slice_length = GRPC_SLICE_LENGTH(
           tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]);
       if (slice_length > trailing) {
         tcp->outgoing_byte_idx = slice_length - trailing;
@@ -442,7 +440,7 @@ static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
 }
 
 static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                      gpr_slice_buffer *buf, grpc_closure *cb) {
+                      grpc_slice_buffer *buf, grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   grpc_error *error = GRPC_ERROR_NONE;
 
@@ -451,7 +449,7 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 
     for (i = 0; i < buf->count; i++) {
       char *data =
-          gpr_dump_slice(buf->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII);
+          grpc_dump_slice(buf->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII);
       gpr_log(GPR_DEBUG, "WRITE %p (peer=%s): %s", tcp, tcp->peer_string, data);
       gpr_free(data);
     }
@@ -462,9 +460,10 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 
   if (buf->length == 0) {
     GPR_TIMER_END("tcp_write", 0);
-    grpc_exec_ctx_sched(exec_ctx, cb, grpc_fd_is_shutdown(tcp->em_fd)
-                                          ? GRPC_ERROR_CREATE("EOF")
-                                          : GRPC_ERROR_NONE,
+    grpc_exec_ctx_sched(exec_ctx, cb,
+                        grpc_fd_is_shutdown(tcp->em_fd)
+                            ? tcp_annotate_error(GRPC_ERROR_CREATE("EOF"), tcp)
+                            : GRPC_ERROR_NONE,
                         NULL);
     return;
   }
@@ -508,6 +507,11 @@ static char *tcp_get_peer(grpc_endpoint *ep) {
   return gpr_strdup(tcp->peer_string);
 }
 
+static int tcp_get_fd(grpc_endpoint *ep) {
+  grpc_tcp *tcp = (grpc_tcp *)ep;
+  return tcp->fd;
+}
+
 static grpc_workqueue *tcp_get_workqueue(grpc_endpoint *ep) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   return grpc_fd_get_workqueue(tcp->em_fd);
@@ -515,7 +519,7 @@ static grpc_workqueue *tcp_get_workqueue(grpc_endpoint *ep) {
 
 static grpc_resource_user *tcp_get_resource_user(grpc_endpoint *ep) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
-  return &tcp->resource_user;
+  return tcp->resource_user;
 }
 
 static const grpc_endpoint_vtable vtable = {tcp_read,
@@ -526,7 +530,8 @@ static const grpc_endpoint_vtable vtable = {tcp_read,
                                             tcp_shutdown,
                                             tcp_destroy,
                                             tcp_get_resource_user,
-                                            tcp_get_peer};
+                                            tcp_get_peer,
+                                            tcp_get_fd};
 
 grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd,
                                grpc_resource_quota *resource_quota,
@@ -543,20 +548,18 @@ grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd,
   tcp->slice_size = slice_size;
   tcp->iov_size = 1;
   tcp->finished_edge = true;
-  /* paired with unref in grpc_tcp_destroy, and with the shutdown for our
-   * resource_user */
-  gpr_ref_init(&tcp->refcount, 2);
+  /* paired with unref in grpc_tcp_destroy */
+  gpr_ref_init(&tcp->refcount, 1);
   gpr_atm_no_barrier_store(&tcp->shutdown_count, 0);
   tcp->em_fd = em_fd;
   tcp->read_closure.cb = tcp_handle_read;
   tcp->read_closure.cb_arg = tcp;
   tcp->write_closure.cb = tcp_handle_write;
   tcp->write_closure.cb_arg = tcp;
-  gpr_slice_buffer_init(&tcp->last_read_buffer);
-  grpc_resource_user_init(&tcp->resource_user, resource_quota, peer_string);
-  grpc_resource_user_slice_allocator_init(&tcp->slice_allocator,
-                                          &tcp->resource_user,
-                                          tcp_read_allocation_done, tcp);
+  grpc_slice_buffer_init(&tcp->last_read_buffer);
+  tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
+  grpc_resource_user_slice_allocator_init(
+      &tcp->slice_allocator, tcp->resource_user, tcp_read_allocation_done, tcp);
   /* Tell network status tracker about new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
 
@@ -576,8 +579,7 @@ void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   GPR_ASSERT(ep->vtable == &vtable);
   tcp->release_fd = fd;
   tcp->release_fd_cb = done;
-  tcp_maybe_shutdown_resource_user(exec_ctx, tcp);
-  gpr_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
+  grpc_slice_buffer_reset_and_unref(&tcp->last_read_buffer);
   TCP_UNREF(exec_ctx, tcp, "destroy");
 }
 
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index 6eba8c4057..437a94beff 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -52,7 +52,8 @@ typedef struct grpc_tcp_server_acceptor {
   unsigned fd_index;
 } grpc_tcp_server_acceptor;
 
-/* Called for newly connected TCP connections. */
+/* Called for newly connected TCP connections.
+   Takes ownership of acceptor. */
 typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx *exec_ctx, void *arg,
                                    grpc_endpoint *ep,
                                    grpc_pollset *accepting_pollset,
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index b6fc1e4ca2..179f47ef76 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -381,16 +381,12 @@ error:
 /* event manager callback when reads are ready */
 static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *err) {
   grpc_tcp_listener *sp = arg;
-  grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index,
-                                       sp->fd_index};
-  grpc_pollset *read_notifier_pollset = NULL;
-  grpc_fd *fdobj;
 
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
 
-  read_notifier_pollset =
+  grpc_pollset *read_notifier_pollset =
       sp->server->pollsets[(size_t)gpr_atm_no_barrier_fetch_add(
                                &sp->server->next_pollset_to_assign, 1) %
                            sp->server->pollset_count];
@@ -426,7 +422,7 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *err) {
       gpr_log(GPR_DEBUG, "SERVER_CONNECT: incoming connection: %s", addr_str);
     }
 
-    fdobj = grpc_fd_create(fd, name);
+    grpc_fd *fdobj = grpc_fd_create(fd, name);
 
     if (read_notifier_pollset == NULL) {
       gpr_log(GPR_ERROR, "Read notifier pollset is not set on the fd");
@@ -435,11 +431,17 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *err) {
 
     grpc_pollset_add_fd(exec_ctx, read_notifier_pollset, fdobj);
 
+    // Create acceptor.
+    grpc_tcp_server_acceptor *acceptor = gpr_malloc(sizeof(*acceptor));
+    acceptor->from_server = sp->server;
+    acceptor->port_index = sp->port_index;
+    acceptor->fd_index = sp->fd_index;
+
     sp->server->on_accept_cb(
         exec_ctx, sp->server->on_accept_cb_arg,
         grpc_tcp_create(fdobj, sp->server->resource_quota,
                         GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str),
-        read_notifier_pollset, &acceptor);
+        read_notifier_pollset, acceptor);
 
     gpr_free(name);
     gpr_free(addr_str);
@@ -657,41 +659,46 @@ done:
   }
 }
 
+/* Return listener at port_index or NULL. Should only be called with s->mu
+   locked. */
+static grpc_tcp_listener *get_port_index(grpc_tcp_server *s,
+                                         unsigned port_index) {
+  unsigned num_ports = 0;
+  grpc_tcp_listener *sp;
+  for (sp = s->head; sp; sp = sp->next) {
+    if (!sp->is_sibling) {
+      if (++num_ports > port_index) {
+        return sp;
+      }
+    }
+  }
+  return NULL;
+}
+
 unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s,
                                        unsigned port_index) {
   unsigned num_fds = 0;
-  grpc_tcp_listener *sp;
   gpr_mu_lock(&s->mu);
-  for (sp = s->head; sp && port_index != 0; sp = sp->next) {
-    if (!sp->is_sibling) {
-      --port_index;
-    }
+  grpc_tcp_listener *sp = get_port_index(s, port_index);
+  for (; sp; sp = sp->sibling) {
+    ++num_fds;
   }
-  for (; sp; sp = sp->sibling, ++num_fds)
-    ;
   gpr_mu_unlock(&s->mu);
   return num_fds;
 }
 
 int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
                             unsigned fd_index) {
-  grpc_tcp_listener *sp;
-  int fd;
   gpr_mu_lock(&s->mu);
-  for (sp = s->head; sp && port_index != 0; sp = sp->next) {
-    if (!sp->is_sibling) {
-      --port_index;
+  grpc_tcp_listener *sp = get_port_index(s, port_index);
+  for (; sp; sp = sp->sibling, --fd_index) {
+    if (fd_index == 0) {
+      gpr_mu_unlock(&s->mu);
+      return sp->fd;
     }
   }
-  for (; sp && fd_index != 0; sp = sp->sibling, --fd_index)
-    ;
-  if (sp) {
-    fd = sp->fd;
-  } else {
-    fd = -1;
-  }
   gpr_mu_unlock(&s->mu);
-  return fd;
+  return -1;
 }
 
 void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
diff --git a/src/core/lib/iomgr/tcp_server_uv.c b/src/core/lib/iomgr/tcp_server_uv.c
index 73e4db3d65..e1a174cfa2 100644
--- a/src/core/lib/iomgr/tcp_server_uv.c
+++ b/src/core/lib/iomgr/tcp_server_uv.c
@@ -76,13 +76,30 @@ struct grpc_tcp_server {
 
   /* shutdown callback */
   grpc_closure *shutdown_complete;
+
+  grpc_resource_quota *resource_quota;
 };
 
-grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
+grpc_error *grpc_tcp_server_create(grpc_exec_ctx *exec_ctx,
+                                   grpc_closure *shutdown_complete,
                                    const grpc_channel_args *args,
                                    grpc_tcp_server **server) {
   grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
-  (void)args;
+  s->resource_quota = grpc_resource_quota_create(NULL);
+  for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
+    if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) {
+      if (args->args[i].type == GRPC_ARG_POINTER) {
+        grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
+        s->resource_quota =
+            grpc_resource_quota_internal_ref(args->args[i].value.pointer.p);
+      } else {
+        grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
+        gpr_free(s);
+        return GRPC_ERROR_CREATE(GRPC_ARG_RESOURCE_QUOTA
+                                 " must be a pointer to a buffer pool");
+      }
+    }
+  }
   gpr_ref_init(&s->refs, 1);
   s->on_accept_cb = NULL;
   s->on_accept_cb_arg = NULL;
@@ -119,6 +136,7 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
     gpr_free(sp->handle);
     gpr_free(sp);
   }
+  grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
   gpr_free(s);
 }
 
@@ -170,7 +188,6 @@ static void accepted_connection_close_cb(uv_handle_t *handle) {
 
 static void on_connect(uv_stream_t *server, int status) {
   grpc_tcp_listener *sp = (grpc_tcp_listener *)server->data;
-  grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index, 0};
   uv_tcp_t *client;
   grpc_endpoint *ep = NULL;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -183,6 +200,7 @@ static void on_connect(uv_stream_t *server, int status) {
             uv_strerror(status));
     return;
   }
+
   client = gpr_malloc(sizeof(uv_tcp_t));
   uv_tcp_init(uv_default_loop(), client);
   // UV documentation says this is guaranteed to succeed
@@ -201,9 +219,14 @@ static void on_connect(uv_stream_t *server, int status) {
     } else {
       gpr_log(GPR_INFO, "uv_tcp_getpeername error: %s", uv_strerror(status));
     }
-    ep = grpc_tcp_create(client, peer_name_string);
+    ep = grpc_tcp_create(client, sp->server->resource_quota, peer_name_string);
+    // Create acceptor.
+    grpc_tcp_server_acceptor *acceptor = gpr_malloc(sizeof(*acceptor));
+    acceptor->from_server = sp->server;
+    acceptor->port_index = sp->port_index;
+    acceptor->fd_index = 0;
     sp->server->on_accept_cb(&exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                             &acceptor);
+                             acceptor);
     grpc_exec_ctx_finish(&exec_ctx);
   }
 }
diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
index ad6769a6ba..b0c8586bac 100644
--- a/src/core/lib/iomgr/tcp_server_windows.c
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -73,6 +73,7 @@ struct grpc_tcp_listener {
   /* The cached AcceptEx for that port. */
   LPFN_ACCEPTEX AcceptEx;
   int shutting_down;
+  int outstanding_calls;
   /* closure for socket notification of accept being ready */
   grpc_closure on_accept;
   /* linked list */
@@ -100,14 +101,32 @@ struct grpc_tcp_server {
 
   /* shutdown callback */
   grpc_closure *shutdown_complete;
+
+  grpc_resource_quota *resource_quota;
 };
 
 /* Public function. Allocates the proper data structures to hold a
    grpc_tcp_server. */
-grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
+grpc_error *grpc_tcp_server_create(grpc_exec_ctx *exec_ctx,
+                                   grpc_closure *shutdown_complete,
                                    const grpc_channel_args *args,
                                    grpc_tcp_server **server) {
   grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
+  s->resource_quota = grpc_resource_quota_create(NULL);
+  for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
+    if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) {
+      if (args->args[i].type == GRPC_ARG_POINTER) {
+        grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
+        s->resource_quota =
+            grpc_resource_quota_internal_ref(args->args[i].value.pointer.p);
+      } else {
+        grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
+        gpr_free(s);
+        return GRPC_ERROR_CREATE(GRPC_ARG_RESOURCE_QUOTA
+                                 " must be a pointer to a buffer pool");
+      }
+    }
+  }
   gpr_ref_init(&s->refs, 1);
   gpr_mu_init(&s->mu);
   s->active_ports = 0;
@@ -122,10 +141,9 @@ grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
   return GRPC_ERROR_NONE;
 }
 
-static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
-  if (s->shutdown_complete != NULL) {
-    grpc_exec_ctx_sched(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE, NULL);
-  }
+static void destroy_server(grpc_exec_ctx *exec_ctx, void *arg,
+                           grpc_error *error) {
+  grpc_tcp_server *s = arg;
 
   /* Now that the accepts have been aborted, we can destroy the sockets.
      The IOCP won't get notified on these, so we can flag them as already
@@ -137,9 +155,20 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
     grpc_winsocket_destroy(sp->socket);
     gpr_free(sp);
   }
+  grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota);
   gpr_free(s);
 }
 
+static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
+                                   grpc_tcp_server *s) {
+  if (s->shutdown_complete != NULL) {
+    grpc_exec_ctx_sched(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE, NULL);
+  }
+
+  grpc_exec_ctx_sched(exec_ctx, grpc_closure_create(destroy_server, s),
+                      GRPC_ERROR_NONE, NULL);
+}
+
 grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s) {
   gpr_ref_non_zero(&s->refs);
   return s;
@@ -161,17 +190,14 @@ static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   /* First, shutdown all fd's. This will queue abortion calls for all
      of the pending accepts due to the normal operation mechanism. */
   if (s->active_ports == 0) {
-    immediately_done = 1;
-  }
-  for (sp = s->head; sp; sp = sp->next) {
-    sp->shutting_down = 1;
-    grpc_winsocket_shutdown(sp->socket);
+    finish_shutdown_locked(exec_ctx, s);
+  } else {
+    for (sp = s->head; sp; sp = sp->next) {
+      sp->shutting_down = 1;
+      grpc_winsocket_shutdown(sp->socket);
+    }
   }
   gpr_mu_unlock(&s->mu);
-
-  if (immediately_done) {
-    finish_shutdown(exec_ctx, s);
-  }
 }
 
 void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
@@ -207,12 +233,13 @@ static grpc_error *prepare_socket(SOCKET sock,
     goto failure;
   }
 
-  sockname_temp.len = sizeof(struct sockaddr_storage);
+  int sockname_temp_len = sizeof(struct sockaddr_storage);
   if (getsockname(sock, (struct sockaddr *)sockname_temp.addr,
-                  &sockname_temp.len) == SOCKET_ERROR) {
+                  &sockname_temp_len) == SOCKET_ERROR) {
     error = GRPC_WSA_ERROR(WSAGetLastError(), "getsockname");
     goto failure;
   }
+  sockname_temp.len = sockname_temp_len;
 
   *port = grpc_sockaddr_get_port(&sockname_temp);
   return GRPC_ERROR_NONE;
@@ -231,31 +258,30 @@ failure:
   return error;
 }
 
-static void decrement_active_ports_and_notify(grpc_exec_ctx *exec_ctx,
-                                              grpc_tcp_listener *sp) {
+static void decrement_active_ports_and_notify_locked(grpc_exec_ctx *exec_ctx,
+                                                     grpc_tcp_listener *sp) {
   int notify = 0;
   sp->shutting_down = 0;
-  gpr_mu_lock(&sp->server->mu);
   GPR_ASSERT(sp->server->active_ports > 0);
   if (0 == --sp->server->active_ports) {
-    notify = 1;
-  }
-  gpr_mu_unlock(&sp->server->mu);
-  if (notify) {
-    finish_shutdown(exec_ctx, sp->server);
+    finish_shutdown_locked(exec_ctx, sp->server);
   }
 }
 
 /* In order to do an async accept, we need to create a socket first which
    will be the one assigned to the new incoming connection. */
-static grpc_error *start_accept(grpc_exec_ctx *exec_ctx,
-                                grpc_tcp_listener *port) {
+static grpc_error *start_accept_locked(grpc_exec_ctx *exec_ctx,
+                                       grpc_tcp_listener *port) {
   SOCKET sock = INVALID_SOCKET;
   BOOL success;
   DWORD addrlen = sizeof(struct sockaddr_in6) + 16;
   DWORD bytes_received = 0;
   grpc_error *error = GRPC_ERROR_NONE;
 
+  if (port->shutting_down) {
+    return GRPC_ERROR_NONE;
+  }
+
   sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
                    WSA_FLAG_OVERLAPPED);
   if (sock == INVALID_SOCKET) {
@@ -285,20 +311,11 @@ static grpc_error *start_accept(grpc_exec_ctx *exec_ctx,
      immediately process an accept that happened in the meantime. */
   port->new_socket = sock;
   grpc_socket_notify_on_read(exec_ctx, port->socket, &port->on_accept);
+  port->outstanding_calls++;
   return error;
 
 failure:
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  if (port->shutting_down) {
-    /* We are abandoning the listener port, take that into account to prevent
-       occasional hangs on shutdown. The hang happens when sp->shutting_down
-       change is not seen by on_accept and we proceed to trying new accept,
-       but we fail there because the listening port has been closed in the
-       meantime. */
-    decrement_active_ports_and_notify(exec_ctx, port);
-    GRPC_ERROR_UNREF(error);
-    return GRPC_ERROR_NONE;
-  }
   if (sock != INVALID_SOCKET) closesocket(sock);
   return error;
 }
@@ -306,7 +323,6 @@ failure:
 /* Event manager callback when reads are ready. */
 static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   grpc_tcp_listener *sp = arg;
-  grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index, 0};
   SOCKET sock = sp->new_socket;
   grpc_winsocket_callback_info *info = &sp->socket->read_info;
   grpc_endpoint *ep = NULL;
@@ -318,6 +334,8 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   BOOL wsa_success;
   int err;
 
+  gpr_mu_lock(&sp->server->mu);
+
   peer_name.len = sizeof(struct sockaddr_storage);
 
   /* The general mechanism for shutting down is to queue abortion calls. While
@@ -327,6 +345,7 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
     const char *msg = grpc_error_string(error);
     gpr_log(GPR_INFO, "Skipping on_accept due to error: %s", msg);
     grpc_error_free_string(msg);
+    gpr_mu_unlock(&sp->server->mu);
     return;
   }
 
@@ -336,17 +355,12 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   wsa_success = WSAGetOverlappedResult(sock, &info->overlapped,
                                        &transfered_bytes, FALSE, &flags);
   if (!wsa_success) {
-    if (sp->shutting_down) {
-      /* During the shutdown case, we ARE expecting an error. So that's well,
-         and we can wake up the shutdown thread. */
-      decrement_active_ports_and_notify(exec_ctx, sp);
-      return;
-    } else {
+    if (!sp->shutting_down) {
       char *utf8_message = gpr_format_message(WSAGetLastError());
       gpr_log(GPR_ERROR, "on_accept error: %s", utf8_message);
       gpr_free(utf8_message);
-      closesocket(sock);
     }
+    closesocket(sock);
   } else {
     if (!sp->shutting_down) {
       peer_name_string = NULL;
@@ -357,8 +371,10 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
         gpr_log(GPR_ERROR, "setsockopt error: %s", utf8_message);
         gpr_free(utf8_message);
       }
+      int peer_name_len = (int)peer_name.len;
       err =
-          getpeername(sock, (struct sockaddr *)peer_name.addr, &peer_name.len);
+          getpeername(sock, (struct sockaddr *)peer_name.addr, &peer_name_len);
+      peer_name.len = peer_name_len;
       if (!err) {
         peer_name_string = grpc_sockaddr_to_uri(&peer_name);
       } else {
@@ -368,7 +384,7 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
       }
       gpr_asprintf(&fd_name, "tcp_server:%s", peer_name_string);
       ep = grpc_tcp_create(grpc_winsocket_create(sock, fd_name),
-                           peer_name_string);
+                           sp->server->resource_quota, peer_name_string);
       gpr_free(fd_name);
       gpr_free(peer_name_string);
     } else {
@@ -379,14 +395,24 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   /* The only time we should call our callback, is where we successfully
      managed to accept a connection, and created an endpoint. */
   if (ep) {
+    // Create acceptor.
+    grpc_tcp_server_acceptor *acceptor = gpr_malloc(sizeof(*acceptor));
+    acceptor->from_server = sp->server;
+    acceptor->port_index = sp->port_index;
+    acceptor->fd_index = 0;
     sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                             &acceptor);
+                             acceptor);
   }
   /* As we were notified from the IOCP of one and exactly one accept,
      the former socked we created has now either been destroy or assigned
      to the new connection. We need to create a new one for the next
      connection. */
-  GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept(exec_ctx, sp)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
+  if (0 == --sp->outstanding_calls) {
+    decrement_active_ports_and_notify_locked(exec_ctx, sp);
+  }
+  gpr_mu_unlock(&sp->server->mu);
 }
 
 static grpc_error *add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
@@ -434,6 +460,7 @@ static grpc_error *add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
   sp->server = s;
   sp->socket = grpc_winsocket_create(sock, "listener");
   sp->shutting_down = 0;
+  sp->outstanding_calls = 0;
   sp->AcceptEx = AcceptEx;
   sp->new_socket = INVALID_SOCKET;
   sp->port = port;
@@ -466,10 +493,11 @@ grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s,
      as some previously created listener. */
   if (grpc_sockaddr_get_port(addr) == 0) {
     for (sp = s->head; sp; sp = sp->next) {
-      sockname_temp.len = sizeof(struct sockaddr_storage);
+      int sockname_temp_len = sizeof(struct sockaddr_storage);
       if (0 == getsockname(sp->socket->socket,
                            (struct sockaddr *)sockname_temp.addr,
-                           &sockname_temp.len)) {
+                           &sockname_temp_len)) {
+        sockname_temp.len = sockname_temp_len;
         *port = grpc_sockaddr_get_port(&sockname_temp);
         if (*port > 0) {
           allocated_addr = gpr_malloc(sizeof(grpc_resolved_address));
@@ -530,7 +558,8 @@ void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
   s->on_accept_cb = on_accept_cb;
   s->on_accept_cb_arg = on_accept_cb_arg;
   for (sp = s->head; sp; sp = sp->next) {
-    GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept(exec_ctx, sp)));
+    GPR_ASSERT(
+        GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
     s->active_ports++;
   }
   gpr_mu_unlock(&s->mu);
diff --git a/src/core/lib/iomgr/tcp_uv.c b/src/core/lib/iomgr/tcp_uv.c
index 3860fe3e9b..6e2ad1dbe9 100644
--- a/src/core/lib/iomgr/tcp_uv.c
+++ b/src/core/lib/iomgr/tcp_uv.c
@@ -38,14 +38,17 @@
 #include <limits.h>
 #include <string.h>
 
+#include <grpc/slice_buffer.h>
+
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/network_status_tracker.h"
+#include "src/core/lib/iomgr/resource_quota.h"
 #include "src/core/lib/iomgr/tcp_uv.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 int grpc_tcp_trace = 0;
@@ -54,35 +57,46 @@ typedef struct {
   grpc_endpoint base;
   gpr_refcount refcount;
 
+  uv_write_t write_req;
+  uv_shutdown_t shutdown_req;
+
   uv_tcp_t *handle;
 
   grpc_closure *read_cb;
   grpc_closure *write_cb;
 
-  gpr_slice read_slice;
-  gpr_slice_buffer *read_slices;
-  gpr_slice_buffer *write_slices;
+  grpc_slice read_slice;
+  grpc_slice_buffer *read_slices;
+  grpc_slice_buffer *write_slices;
   uv_buf_t *write_buffers;
 
+  grpc_resource_user *resource_user;
+
   bool shutting_down;
+
   char *peer_string;
   grpc_pollset *pollset;
 } grpc_tcp;
 
 static void uv_close_callback(uv_handle_t *handle) { gpr_free(handle); }
 
-static void tcp_free(grpc_tcp *tcp) { gpr_free(tcp); }
+static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
+  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  gpr_free(tcp);
+}
 
 /*#define GRPC_TCP_REFCOUNT_DEBUG*/
 #ifdef GRPC_TCP_REFCOUNT_DEBUG
-#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
-#define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_tcp *tcp, const char *reason, const char *file,
-                      int line) {
+#define TCP_UNREF(exec_ctx, tcp, reason) \
+  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_REF(tcp, reason) \
+  tcp_ref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
+                      const char *reason, const char *file, int line) {
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp,
           reason, tcp->refcount.count, tcp->refcount.count - 1);
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(tcp);
+    tcp_free(exec_ctx, tcp);
   }
 }
 
@@ -93,11 +107,11 @@ static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file,
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
+#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_tcp *tcp) {
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(tcp);
+    tcp_free(exec_ctx, tcp);
   }
 }
 
@@ -106,16 +120,19 @@ static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
 
 static void alloc_uv_buf(uv_handle_t *handle, size_t suggested_size,
                          uv_buf_t *buf) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp *tcp = handle->data;
   (void)suggested_size;
-  tcp->read_slice = gpr_slice_malloc(GRPC_TCP_DEFAULT_READ_SLICE_SIZE);
-  buf->base = (char *)GPR_SLICE_START_PTR(tcp->read_slice);
-  buf->len = GPR_SLICE_LENGTH(tcp->read_slice);
+  tcp->read_slice = grpc_resource_user_slice_malloc(
+      &exec_ctx, tcp->resource_user, GRPC_TCP_DEFAULT_READ_SLICE_SIZE);
+  buf->base = (char *)GRPC_SLICE_START_PTR(tcp->read_slice);
+  buf->len = GRPC_SLICE_LENGTH(tcp->read_slice);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void read_callback(uv_stream_t *stream, ssize_t nread,
                           const uv_buf_t *buf) {
-  gpr_slice sub;
+  grpc_slice sub;
   grpc_error *error;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp *tcp = stream->data;
@@ -124,7 +141,7 @@ static void read_callback(uv_stream_t *stream, ssize_t nread,
     // Nothing happened. Wait for the next callback
     return;
   }
-  TCP_UNREF(tcp, "read");
+  TCP_UNREF(&exec_ctx, tcp, "read");
   tcp->read_cb = NULL;
   // TODO(murgatroid99): figure out what the return value here means
   uv_read_stop(stream);
@@ -132,8 +149,8 @@ static void read_callback(uv_stream_t *stream, ssize_t nread,
     error = GRPC_ERROR_CREATE("EOF");
   } else if (nread > 0) {
     // Successful read
-    sub = gpr_slice_sub_no_ref(tcp->read_slice, 0, (size_t)nread);
-    gpr_slice_buffer_add(tcp->read_slices, sub);
+    sub = grpc_slice_sub_no_ref(tcp->read_slice, 0, (size_t)nread);
+    grpc_slice_buffer_add(tcp->read_slices, sub);
     error = GRPC_ERROR_NONE;
     if (grpc_tcp_trace) {
       size_t i;
@@ -141,8 +158,8 @@ static void read_callback(uv_stream_t *stream, ssize_t nread,
       gpr_log(GPR_DEBUG, "read: error=%s", str);
       grpc_error_free_string(str);
       for (i = 0; i < tcp->read_slices->count; i++) {
-        char *dump = gpr_dump_slice(tcp->read_slices->slices[i],
-                                    GPR_DUMP_HEX | GPR_DUMP_ASCII);
+        char *dump = grpc_dump_slice(tcp->read_slices->slices[i],
+                                     GPR_DUMP_HEX | GPR_DUMP_ASCII);
         gpr_log(GPR_DEBUG, "READ %p (peer=%s): %s", tcp, tcp->peer_string,
                 dump);
         gpr_free(dump);
@@ -157,14 +174,14 @@ static void read_callback(uv_stream_t *stream, ssize_t nread,
 }
 
 static void uv_endpoint_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                             gpr_slice_buffer *read_slices, grpc_closure *cb) {
+                             grpc_slice_buffer *read_slices, grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   int status;
   grpc_error *error = GRPC_ERROR_NONE;
   GPR_ASSERT(tcp->read_cb == NULL);
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  gpr_slice_buffer_reset_and_unref(read_slices);
+  grpc_slice_buffer_reset_and_unref(read_slices);
   TCP_REF(tcp, "read");
   // TODO(murgatroid99): figure out what the return value here means
   status =
@@ -187,7 +204,7 @@ static void write_callback(uv_write_t *req, int status) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_closure *cb = tcp->write_cb;
   tcp->write_cb = NULL;
-  TCP_UNREF(tcp, "write");
+  TCP_UNREF(&exec_ctx, tcp, "write");
   if (status == 0) {
     error = GRPC_ERROR_NONE;
   } else {
@@ -198,27 +215,28 @@ static void write_callback(uv_write_t *req, int status) {
     gpr_log(GPR_DEBUG, "write complete on %p: error=%s", tcp, str);
   }
   gpr_free(tcp->write_buffers);
-  gpr_free(req);
+  grpc_resource_user_free(&exec_ctx, tcp->resource_user,
+                          sizeof(uv_buf_t) * tcp->write_slices->count);
   grpc_exec_ctx_sched(&exec_ctx, cb, error, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void uv_endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                              gpr_slice_buffer *write_slices,
+                              grpc_slice_buffer *write_slices,
                               grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   uv_buf_t *buffers;
   unsigned int buffer_count;
   unsigned int i;
-  gpr_slice *slice;
+  grpc_slice *slice;
   uv_write_t *write_req;
 
   if (grpc_tcp_trace) {
     size_t j;
 
     for (j = 0; j < write_slices->count; j++) {
-      char *data = gpr_dump_slice(write_slices->slices[j],
-                                  GPR_DUMP_HEX | GPR_DUMP_ASCII);
+      char *data = grpc_dump_slice(write_slices->slices[j],
+                                   GPR_DUMP_HEX | GPR_DUMP_ASCII);
       gpr_log(GPR_DEBUG, "WRITE %p (peer=%s): %s", tcp, tcp->peer_string, data);
       gpr_free(data);
     }
@@ -243,12 +261,15 @@ static void uv_endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   tcp->write_cb = cb;
   buffer_count = (unsigned int)tcp->write_slices->count;
   buffers = gpr_malloc(sizeof(uv_buf_t) * buffer_count);
+  grpc_resource_user_alloc(exec_ctx, tcp->resource_user,
+                           sizeof(uv_buf_t) * buffer_count, NULL);
   for (i = 0; i < buffer_count; i++) {
     slice = &tcp->write_slices->slices[i];
-    buffers[i].base = (char *)GPR_SLICE_START_PTR(*slice);
-    buffers[i].len = GPR_SLICE_LENGTH(*slice);
+    buffers[i].base = (char *)GRPC_SLICE_START_PTR(*slice);
+    buffers[i].len = GRPC_SLICE_LENGTH(*slice);
   }
-  write_req = gpr_malloc(sizeof(uv_write_t));
+  tcp->write_buffers = buffers;
+  write_req = &tcp->write_req;
   write_req->data = tcp;
   TCP_REF(tcp, "write");
   // TODO(murgatroid99): figure out what the return value here means
@@ -274,13 +295,13 @@ static void uv_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   (void)pollset;
 }
 
-static void shutdown_callback(uv_shutdown_t *req, int status) { gpr_free(req); }
+static void shutdown_callback(uv_shutdown_t *req, int status) {}
 
 static void uv_endpoint_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   if (!tcp->shutting_down) {
     tcp->shutting_down = true;
-    uv_shutdown_t *req = gpr_malloc(sizeof(uv_shutdown_t));
+    uv_shutdown_t *req = &tcp->shutdown_req;
     uv_shutdown(req, (uv_stream_t *)tcp->handle, shutdown_callback);
   }
 }
@@ -289,7 +310,7 @@ static void uv_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp *tcp = (grpc_tcp *)ep;
   uv_close((uv_handle_t *)tcp->handle, uv_close_callback);
-  TCP_UNREF(tcp, "destroy");
+  TCP_UNREF(exec_ctx, tcp, "destroy");
 }
 
 static char *uv_get_peer(grpc_endpoint *ep) {
@@ -297,18 +318,24 @@ static char *uv_get_peer(grpc_endpoint *ep) {
   return gpr_strdup(tcp->peer_string);
 }
 
+static grpc_resource_user *uv_get_resource_user(grpc_endpoint *ep) {
+  grpc_tcp *tcp = (grpc_tcp *)ep;
+  return tcp->resource_user;
+}
+
 static grpc_workqueue *uv_get_workqueue(grpc_endpoint *ep) { return NULL; }
 
-static grpc_endpoint_vtable vtable = {uv_endpoint_read,
-                                      uv_endpoint_write,
-                                      uv_get_workqueue,
-                                      uv_add_to_pollset,
-                                      uv_add_to_pollset_set,
-                                      uv_endpoint_shutdown,
-                                      uv_destroy,
-                                      uv_get_peer};
+static int uv_get_fd(grpc_endpoint *ep) { return -1; }
+
+static grpc_endpoint_vtable vtable = {
+    uv_endpoint_read,  uv_endpoint_write,     uv_get_workqueue,
+    uv_add_to_pollset, uv_add_to_pollset_set, uv_endpoint_shutdown,
+    uv_destroy,        uv_get_resource_user,  uv_get_peer,
+    uv_get_fd};
 
-grpc_endpoint *grpc_tcp_create(uv_tcp_t *handle, char *peer_string) {
+grpc_endpoint *grpc_tcp_create(uv_tcp_t *handle,
+                               grpc_resource_quota *resource_quota,
+                               char *peer_string) {
   grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
 
   if (grpc_tcp_trace) {
@@ -325,6 +352,7 @@ grpc_endpoint *grpc_tcp_create(uv_tcp_t *handle, char *peer_string) {
   gpr_ref_init(&tcp->refcount, 1);
   tcp->peer_string = gpr_strdup(peer_string);
   tcp->shutting_down = false;
+  tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
   /* Tell network status tracking code about the new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
 
diff --git a/src/core/lib/iomgr/tcp_uv.h b/src/core/lib/iomgr/tcp_uv.h
index eed41151ea..970fcafe4a 100644
--- a/src/core/lib/iomgr/tcp_uv.h
+++ b/src/core/lib/iomgr/tcp_uv.h
@@ -52,6 +52,8 @@ extern int grpc_tcp_trace;
 
 #define GRPC_TCP_DEFAULT_READ_SLICE_SIZE 8192
 
-grpc_endpoint *grpc_tcp_create(uv_tcp_t *handle, char *peer_string);
+grpc_endpoint *grpc_tcp_create(uv_tcp_t *handle,
+                               grpc_resource_quota *resource_quota,
+                               char *peer_string);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_UV_H */
diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
index a5f508a2c3..d4613b674e 100644
--- a/src/core/lib/iomgr/tcp_windows.c
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -40,10 +40,10 @@
 #include "src/core/lib/iomgr/network_status_tracker.h"
 #include "src/core/lib/iomgr/sockaddr_windows.h"
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/log_windows.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
@@ -105,9 +105,11 @@ typedef struct grpc_tcp {
 
   grpc_closure *read_cb;
   grpc_closure *write_cb;
-  gpr_slice read_slice;
-  gpr_slice_buffer *write_slices;
-  gpr_slice_buffer *read_slices;
+  grpc_slice read_slice;
+  grpc_slice_buffer *write_slices;
+  grpc_slice_buffer *read_slices;
+
+  grpc_resource_user *resource_user;
 
   /* The IO Completion Port runs from another thread. We need some mechanism
      to protect ourselves when requesting a shutdown. */
@@ -117,23 +119,25 @@ typedef struct grpc_tcp {
   char *peer_string;
 } grpc_tcp;
 
-static void tcp_free(grpc_tcp *tcp) {
+static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   grpc_winsocket_destroy(tcp->socket);
   gpr_mu_destroy(&tcp->mu);
   gpr_free(tcp->peer_string);
+  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
   gpr_free(tcp);
 }
 
 /*#define GRPC_TCP_REFCOUNT_DEBUG*/
 #ifdef GRPC_TCP_REFCOUNT_DEBUG
-#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(exec_ctx, tcp, reason) \
+  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_tcp *tcp, const char *reason, const char *file,
-                      int line) {
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
+                      const char *reason, const char *file, int line) {
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp,
           reason, tcp->refcount.count, tcp->refcount.count - 1);
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(tcp);
+    tcp_free(exec_ctx, tcp);
   }
 }
 
@@ -144,11 +148,11 @@ static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file,
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
+#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_tcp *tcp) {
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(tcp);
+    tcp_free(exec_ctx, tcp);
   }
 }
 
@@ -160,7 +164,7 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *tcpp, grpc_error *error) {
   grpc_tcp *tcp = tcpp;
   grpc_closure *cb = tcp->read_cb;
   grpc_winsocket *socket = tcp->socket;
-  gpr_slice sub;
+  grpc_slice sub;
   grpc_winsocket_callback_info *info = &socket->read_info;
 
   GRPC_ERROR_REF(error);
@@ -170,25 +174,25 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *tcpp, grpc_error *error) {
       char *utf8_message = gpr_format_message(info->wsa_error);
       error = GRPC_ERROR_CREATE(utf8_message);
       gpr_free(utf8_message);
-      gpr_slice_unref(tcp->read_slice);
+      grpc_slice_unref(tcp->read_slice);
     } else {
       if (info->bytes_transfered != 0 && !tcp->shutting_down) {
-        sub = gpr_slice_sub_no_ref(tcp->read_slice, 0, info->bytes_transfered);
-        gpr_slice_buffer_add(tcp->read_slices, sub);
+        sub = grpc_slice_sub_no_ref(tcp->read_slice, 0, info->bytes_transfered);
+        grpc_slice_buffer_add(tcp->read_slices, sub);
       } else {
-        gpr_slice_unref(tcp->read_slice);
+        grpc_slice_unref(tcp->read_slice);
         error = GRPC_ERROR_CREATE("End of TCP stream");
       }
     }
   }
 
   tcp->read_cb = NULL;
-  TCP_UNREF(tcp, "read");
+  TCP_UNREF(exec_ctx, tcp, "read");
   grpc_exec_ctx_sched(exec_ctx, cb, error, NULL);
 }
 
 static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                     gpr_slice_buffer *read_slices, grpc_closure *cb) {
+                     grpc_slice_buffer *read_slices, grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   grpc_winsocket *handle = tcp->socket;
   grpc_winsocket_callback_info *info = &handle->read_info;
@@ -205,13 +209,13 @@ static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  gpr_slice_buffer_reset_and_unref(read_slices);
+  grpc_slice_buffer_reset_and_unref(read_slices);
 
-  tcp->read_slice = gpr_slice_malloc(8192);
+  tcp->read_slice = grpc_slice_malloc(8192);
 
-  buffer.len = (ULONG)GPR_SLICE_LENGTH(
+  buffer.len = (ULONG)GRPC_SLICE_LENGTH(
       tcp->read_slice);  // we know slice size fits in 32bit.
-  buffer.buf = (char *)GPR_SLICE_START_PTR(tcp->read_slice);
+  buffer.buf = (char *)GRPC_SLICE_START_PTR(tcp->read_slice);
 
   TCP_REF(tcp, "read");
 
@@ -267,13 +271,13 @@ static void on_write(grpc_exec_ctx *exec_ctx, void *tcpp, grpc_error *error) {
     }
   }
 
-  TCP_UNREF(tcp, "write");
+  TCP_UNREF(exec_ctx, tcp, "write");
   grpc_exec_ctx_sched(exec_ctx, cb, error, NULL);
 }
 
 /* Initiates a write. */
 static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
-                      gpr_slice_buffer *slices, grpc_closure *cb) {
+                      grpc_slice_buffer *slices, grpc_closure *cb) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
   grpc_winsocket *socket = tcp->socket;
   grpc_winsocket_callback_info *info = &socket->write_info;
@@ -300,10 +304,10 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   }
 
   for (i = 0; i < tcp->write_slices->count; i++) {
-    len = GPR_SLICE_LENGTH(tcp->write_slices->slices[i]);
+    len = GRPC_SLICE_LENGTH(tcp->write_slices->slices[i]);
     GPR_ASSERT(len <= ULONG_MAX);
     buffers[i].len = (ULONG)len;
-    buffers[i].buf = (char *)GPR_SLICE_START_PTR(tcp->write_slices->slices[i]);
+    buffers[i].buf = (char *)GRPC_SLICE_START_PTR(tcp->write_slices->slices[i]);
   }
 
   /* First, let's try a synchronous, non-blocking write. */
@@ -335,7 +339,7 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   if (status != 0) {
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
-      TCP_UNREF(tcp, "write");
+      TCP_UNREF(exec_ctx, tcp, "write");
       grpc_exec_ctx_sched(exec_ctx, cb, GRPC_WSA_ERROR(wsa_error, "WSASend"),
                           NULL);
       return;
@@ -377,12 +381,13 @@ static void win_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   tcp->shutting_down = 1;
   grpc_winsocket_shutdown(tcp->socket);
   gpr_mu_unlock(&tcp->mu);
+  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
 }
 
 static void win_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp *tcp = (grpc_tcp *)ep;
-  TCP_UNREF(tcp, "destroy");
+  TCP_UNREF(exec_ctx, tcp, "destroy");
 }
 
 static char *win_get_peer(grpc_endpoint *ep) {
@@ -392,6 +397,13 @@ static char *win_get_peer(grpc_endpoint *ep) {
 
 static grpc_workqueue *win_get_workqueue(grpc_endpoint *ep) { return NULL; }
 
+static grpc_resource_user *win_get_resource_user(grpc_endpoint *ep) {
+  grpc_tcp *tcp = (grpc_tcp *)ep;
+  return tcp->resource_user;
+}
+
+static int win_get_fd(grpc_endpoint *ep) { return -1; }
+
 static grpc_endpoint_vtable vtable = {win_read,
                                       win_write,
                                       win_get_workqueue,
@@ -399,9 +411,13 @@ static grpc_endpoint_vtable vtable = {win_read,
                                       win_add_to_pollset_set,
                                       win_shutdown,
                                       win_destroy,
-                                      win_get_peer};
+                                      win_get_resource_user,
+                                      win_get_peer,
+                                      win_get_fd};
 
-grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string) {
+grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket,
+                               grpc_resource_quota *resource_quota,
+                               char *peer_string) {
   grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
   memset(tcp, 0, sizeof(grpc_tcp));
   tcp->base.vtable = &vtable;
@@ -411,6 +427,7 @@ grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string) {
   grpc_closure_init(&tcp->on_read, on_read, tcp);
   grpc_closure_init(&tcp->on_write, on_write, tcp);
   tcp->peer_string = gpr_strdup(peer_string);
+  tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
   /* Tell network status tracking code about the new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
 
diff --git a/src/core/lib/iomgr/tcp_windows.h b/src/core/lib/iomgr/tcp_windows.h
index 86d777235e..4402de1c38 100644
--- a/src/core/lib/iomgr/tcp_windows.h
+++ b/src/core/lib/iomgr/tcp_windows.h
@@ -50,7 +50,9 @@
 /* Create a tcp endpoint given a winsock handle.
  * Takes ownership of the handle.
  */
-grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string);
+grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket,
+                               grpc_resource_quota *resource_quota,
+                               char *peer_string);
 
 grpc_error *grpc_tcp_prepare_socket(SOCKET sock);
 
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index fd0c7a0f9d..3c24ea9afa 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -388,7 +388,8 @@ int grpc_udp_server_add_port(grpc_udp_server *s,
     /* Try listening on IPv6 first. */
     addr = &wild6;
     // TODO(rjshade): Test and propagate the returned grpc_error*:
-    grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd);
+    GRPC_ERROR_UNREF(grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP,
+                                                  &dsmode, &fd));
     allocated_port1 = add_socket_to_server(s, fd, addr, read_cb, orphan_cb);
     if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) {
       goto done;
@@ -402,7 +403,8 @@ int grpc_udp_server_add_port(grpc_udp_server *s,
   }
 
   // TODO(rjshade): Test and propagate the returned grpc_error*:
-  grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd);
+  GRPC_ERROR_UNREF(grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP,
+                                                &dsmode, &fd));
   if (fd < 0) {
     gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
   }
diff --git a/src/core/lib/iomgr/wakeup_fd_pipe.c b/src/core/lib/iomgr/wakeup_fd_pipe.c
index 183f0eb930..e186d63683 100644
--- a/src/core/lib/iomgr/wakeup_fd_pipe.c
+++ b/src/core/lib/iomgr/wakeup_fd_pipe.c
@@ -95,6 +95,8 @@ static void pipe_destroy(grpc_wakeup_fd* fd_info) {
 
 static int pipe_check_availability(void) {
   grpc_wakeup_fd fd;
+  fd.read_fd = fd.write_fd = -1;
+
   if (pipe_init(&fd) == GRPC_ERROR_NONE) {
     pipe_destroy(&fd);
     return 1;
diff --git a/src/core/lib/json/json.c b/src/core/lib/json/json.c
index 5b583a1f2e..48b13686d7 100644
--- a/src/core/lib/json/json.c
+++ b/src/core/lib/json/json.c
@@ -37,15 +37,15 @@
 
 #include "src/core/lib/json/json.h"
 
-grpc_json *grpc_json_create(grpc_json_type type) {
-  grpc_json *json = gpr_malloc(sizeof(*json));
+grpc_json* grpc_json_create(grpc_json_type type) {
+  grpc_json* json = gpr_malloc(sizeof(*json));
   memset(json, 0, sizeof(*json));
   json->type = type;
 
   return json;
 }
 
-void grpc_json_destroy(grpc_json *json) {
+void grpc_json_destroy(grpc_json* json) {
   while (json->child) {
     grpc_json_destroy(json->child);
   }
diff --git a/src/core/lib/json/json.h b/src/core/lib/json/json.h
index 681df4bb77..7111db0b52 100644
--- a/src/core/lib/json/json.h
+++ b/src/core/lib/json/json.h
@@ -42,14 +42,14 @@
  * are not owned by it.
  */
 typedef struct grpc_json {
-  struct grpc_json *next;
-  struct grpc_json *prev;
-  struct grpc_json *child;
-  struct grpc_json *parent;
+  struct grpc_json* next;
+  struct grpc_json* prev;
+  struct grpc_json* child;
+  struct grpc_json* parent;
 
   grpc_json_type type;
-  const char *key;
-  const char *value;
+  const char* key;
+  const char* value;
 } grpc_json;
 
 /* The next two functions are going to parse the input string, and
@@ -65,8 +65,8 @@ typedef struct grpc_json {
  *
  * Delete the allocated tree afterward using grpc_json_destroy().
  */
-grpc_json *grpc_json_parse_string_with_len(char *input, size_t size);
-grpc_json *grpc_json_parse_string(char *input);
+grpc_json* grpc_json_parse_string_with_len(char* input, size_t size);
+grpc_json* grpc_json_parse_string(char* input);
 
 /* This function will create a new string using gpr_realloc, and will
  * deserialize the grpc_json tree into it. It'll be zero-terminated,
@@ -76,13 +76,13 @@ grpc_json *grpc_json_parse_string(char *input);
  * If indent is 0, then newlines will be suppressed as well, and the
  * output will be condensed at its maximum.
  */
-char *grpc_json_dump_to_string(grpc_json *json, int indent);
+char* grpc_json_dump_to_string(grpc_json* json, int indent);
 
 /* Use these to create or delete a grpc_json object.
  * Deletion is recursive. We will not attempt to free any of the strings
  * in any of the objects of that tree.
  */
-grpc_json *grpc_json_create(grpc_json_type type);
-void grpc_json_destroy(grpc_json *json);
+grpc_json* grpc_json_create(grpc_json_type type);
+void grpc_json_destroy(grpc_json* json);
 
 #endif /* GRPC_CORE_LIB_JSON_JSON_H */
diff --git a/src/core/lib/security/credentials/credentials.h b/src/core/lib/security/credentials/credentials.h
index 6fb5b5b15a..85b3bc5350 100644
--- a/src/core/lib/security/credentials/credentials.h
+++ b/src/core/lib/security/credentials/credentials.h
@@ -141,8 +141,8 @@ grpc_channel_credentials_duplicate_without_call_credentials(
 /* --- grpc_credentials_md. --- */
 
 typedef struct {
-  gpr_slice key;
-  gpr_slice value;
+  grpc_slice key;
+  grpc_slice value;
 } grpc_credentials_md;
 
 typedef struct {
@@ -157,7 +157,7 @@ grpc_credentials_md_store *grpc_credentials_md_store_create(
 
 /* Will ref key and value. */
 void grpc_credentials_md_store_add(grpc_credentials_md_store *store,
-                                   gpr_slice key, gpr_slice value);
+                                   grpc_slice key, grpc_slice value);
 void grpc_credentials_md_store_add_cstrings(grpc_credentials_md_store *store,
                                             const char *key, const char *value);
 grpc_credentials_md_store *grpc_credentials_md_store_ref(
diff --git a/src/core/lib/security/credentials/credentials_metadata.c b/src/core/lib/security/credentials/credentials_metadata.c
index 6a352aab3a..e6cb567734 100644
--- a/src/core/lib/security/credentials/credentials_metadata.c
+++ b/src/core/lib/security/credentials/credentials_metadata.c
@@ -59,11 +59,11 @@ grpc_credentials_md_store *grpc_credentials_md_store_create(
 }
 
 void grpc_credentials_md_store_add(grpc_credentials_md_store *store,
-                                   gpr_slice key, gpr_slice value) {
+                                   grpc_slice key, grpc_slice value) {
   if (store == NULL) return;
   store_ensure_capacity(store);
-  store->entries[store->num_entries].key = gpr_slice_ref(key);
-  store->entries[store->num_entries].value = gpr_slice_ref(value);
+  store->entries[store->num_entries].key = grpc_slice_ref(key);
+  store->entries[store->num_entries].value = grpc_slice_ref(value);
   store->num_entries++;
 }
 
@@ -72,9 +72,9 @@ void grpc_credentials_md_store_add_cstrings(grpc_credentials_md_store *store,
                                             const char *value) {
   if (store == NULL) return;
   store_ensure_capacity(store);
-  store->entries[store->num_entries].key = gpr_slice_from_copied_string(key);
+  store->entries[store->num_entries].key = grpc_slice_from_copied_string(key);
   store->entries[store->num_entries].value =
-      gpr_slice_from_copied_string(value);
+      grpc_slice_from_copied_string(value);
   store->num_entries++;
 }
 
@@ -91,8 +91,8 @@ void grpc_credentials_md_store_unref(grpc_credentials_md_store *store) {
     if (store->entries != NULL) {
       size_t i;
       for (i = 0; i < store->num_entries; i++) {
-        gpr_slice_unref(store->entries[i].key);
-        gpr_slice_unref(store->entries[i].value);
+        grpc_slice_unref(store->entries[i].key);
+        grpc_slice_unref(store->entries[i].value);
       }
       gpr_free(store->entries);
     }
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.c b/src/core/lib/security/credentials/google_default/google_default_credentials.c
index cb5ba554b0..afe0e3d357 100644
--- a/src/core/lib/security/credentials/google_default/google_default_credentials.c
+++ b/src/core/lib/security/credentials/google_default/google_default_credentials.c
@@ -45,6 +45,7 @@
 #include "src/core/lib/iomgr/polling_entity.h"
 #include "src/core/lib/security/credentials/jwt/jwt_credentials.h"
 #include "src/core/lib/security/credentials/oauth2/oauth2_credentials.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/env.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/api_trace.h"
@@ -174,7 +175,7 @@ static grpc_error *create_default_creds_from_path(
   grpc_auth_json_key key;
   grpc_auth_refresh_token token;
   grpc_call_credentials *result = NULL;
-  gpr_slice creds_data = gpr_empty_slice();
+  grpc_slice creds_data = gpr_empty_slice();
   grpc_error *error = GRPC_ERROR_NONE;
   if (creds_path == NULL) {
     error = GRPC_ERROR_CREATE("creds_path unset");
@@ -185,9 +186,9 @@ static grpc_error *create_default_creds_from_path(
     goto end;
   }
   json = grpc_json_parse_string_with_len(
-      (char *)GPR_SLICE_START_PTR(creds_data), GPR_SLICE_LENGTH(creds_data));
+      (char *)GRPC_SLICE_START_PTR(creds_data), GRPC_SLICE_LENGTH(creds_data));
   if (json == NULL) {
-    char *dump = gpr_dump_slice(creds_data, GPR_DUMP_HEX | GPR_DUMP_ASCII);
+    char *dump = grpc_dump_slice(creds_data, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     error = grpc_error_set_str(GRPC_ERROR_CREATE("Failed to parse JSON"),
                                GRPC_ERROR_STR_RAW_BYTES, dump);
     gpr_free(dump);
@@ -224,7 +225,7 @@ static grpc_error *create_default_creds_from_path(
 end:
   GPR_ASSERT((result == NULL) + (error == GRPC_ERROR_NONE) == 1);
   if (creds_path != NULL) gpr_free(creds_path);
-  gpr_slice_unref(creds_data);
+  grpc_slice_unref(creds_data);
   if (json != NULL) grpc_json_destroy(json);
   *creds = result;
   return error;
diff --git a/src/core/lib/security/credentials/jwt/json_token.h b/src/core/lib/security/credentials/jwt/json_token.h
index 07fc5bf0e0..c13eb55803 100644
--- a/src/core/lib/security/credentials/jwt/json_token.h
+++ b/src/core/lib/security/credentials/jwt/json_token.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JSON_TOKEN_H
 #define GRPC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JSON_TOKEN_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include <openssl/rsa.h>
 
 #include "src/core/lib/json/json.h"
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index f87ba0ce8d..3daf0f4ef7 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -144,17 +144,44 @@ grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
   return &c->base;
 }
 
+static char *redact_private_key(const char *json_key) {
+  char *json_copy = gpr_strdup(json_key);
+  grpc_json *json = grpc_json_parse_string(json_copy);
+  if (!json) {
+    gpr_free(json_copy);
+    return gpr_strdup("<Json failed to parse.>");
+  }
+  const char *redacted = "<redacted>";
+  grpc_json *current = json->child;
+  while (current) {
+    if (current->type == GRPC_JSON_STRING &&
+        strcmp(current->key, "private_key") == 0) {
+      current->value = (char *)redacted;
+      break;
+    }
+    current = current->next;
+  }
+  char *clean_json = grpc_json_dump_to_string(json, 2);
+  gpr_free(json_copy);
+  grpc_json_destroy(json);
+  return clean_json;
+}
+
 grpc_call_credentials *grpc_service_account_jwt_access_credentials_create(
     const char *json_key, gpr_timespec token_lifetime, void *reserved) {
-  GRPC_API_TRACE(
-      "grpc_service_account_jwt_access_credentials_create("
-      "json_key=%s, "
-      "token_lifetime="
-      "gpr_timespec { tv_sec: %" PRId64
-      ", tv_nsec: %d, clock_type: %d }, "
-      "reserved=%p)",
-      5, (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
-          (int)token_lifetime.clock_type, reserved));
+  if (grpc_api_trace) {
+    char *clean_json = redact_private_key(json_key);
+    gpr_log(GPR_INFO,
+            "grpc_service_account_jwt_access_credentials_create("
+            "json_key=%s, "
+            "token_lifetime="
+            "gpr_timespec { tv_sec: %" PRId64
+            ", tv_nsec: %d, clock_type: %d }, "
+            "reserved=%p)",
+            clean_json, token_lifetime.tv_sec, token_lifetime.tv_nsec,
+            (int)token_lifetime.clock_type, reserved);
+    gpr_free(clean_json);
+  }
   GPR_ASSERT(reserved == NULL);
   return grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
       grpc_auth_json_key_create_from_string(json_key), token_lifetime);
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.c b/src/core/lib/security/credentials/jwt/jwt_verifier.c
index 43eb642515..42bd89dd0a 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.c
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.c
@@ -85,18 +85,18 @@ static const EVP_MD *evp_md_from_alg(const char *alg) {
 }
 
 static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
-                                           gpr_slice *buffer) {
+                                           grpc_slice *buffer) {
   grpc_json *json;
 
   *buffer = grpc_base64_decode_with_len(str, len, 1);
-  if (GPR_SLICE_IS_EMPTY(*buffer)) {
+  if (GRPC_SLICE_IS_EMPTY(*buffer)) {
     gpr_log(GPR_ERROR, "Invalid base64.");
     return NULL;
   }
-  json = grpc_json_parse_string_with_len((char *)GPR_SLICE_START_PTR(*buffer),
-                                         GPR_SLICE_LENGTH(*buffer));
+  json = grpc_json_parse_string_with_len((char *)GRPC_SLICE_START_PTR(*buffer),
+                                         GRPC_SLICE_LENGTH(*buffer));
   if (json == NULL) {
-    gpr_slice_unref(*buffer);
+    grpc_slice_unref(*buffer);
     gpr_log(GPR_ERROR, "JSON parsing error.");
   }
   return json;
@@ -129,16 +129,16 @@ typedef struct {
   const char *kid;
   const char *typ;
   /* TODO(jboeuf): Add others as needed (jku, jwk, x5u, x5c and so on...). */
-  gpr_slice buffer;
+  grpc_slice buffer;
 } jose_header;
 
 static void jose_header_destroy(jose_header *h) {
-  gpr_slice_unref(h->buffer);
+  grpc_slice_unref(h->buffer);
   gpr_free(h);
 }
 
 /* Takes ownership of json and buffer. */
-static jose_header *jose_header_from_json(grpc_json *json, gpr_slice buffer) {
+static jose_header *jose_header_from_json(grpc_json *json, grpc_slice buffer) {
   grpc_json *cur;
   jose_header *h = gpr_malloc(sizeof(jose_header));
   memset(h, 0, sizeof(jose_header));
@@ -190,12 +190,12 @@ struct grpc_jwt_claims {
   gpr_timespec nbf;
 
   grpc_json *json;
-  gpr_slice buffer;
+  grpc_slice buffer;
 };
 
 void grpc_jwt_claims_destroy(grpc_jwt_claims *claims) {
   grpc_json_destroy(claims->json);
-  gpr_slice_unref(claims->buffer);
+  grpc_slice_unref(claims->buffer);
   gpr_free(claims);
 }
 
@@ -240,7 +240,7 @@ gpr_timespec grpc_jwt_claims_not_before(const grpc_jwt_claims *claims) {
 }
 
 /* Takes ownership of json and buffer even in case of failure. */
-grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, gpr_slice buffer) {
+grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, grpc_slice buffer) {
   grpc_json *cur;
   grpc_jwt_claims *claims = gpr_malloc(sizeof(grpc_jwt_claims));
   memset(claims, 0, sizeof(grpc_jwt_claims));
@@ -333,8 +333,8 @@ typedef struct {
   jose_header *header;
   grpc_jwt_claims *claims;
   char *audience;
-  gpr_slice signature;
-  gpr_slice signed_data;
+  grpc_slice signature;
+  grpc_slice signed_data;
   void *user_data;
   grpc_jwt_verification_done_cb user_cb;
   grpc_http_response responses[HTTP_RESPONSE_COUNT];
@@ -343,7 +343,7 @@ typedef struct {
 /* Takes ownership of the header, claims and signature. */
 static verifier_cb_ctx *verifier_cb_ctx_create(
     grpc_jwt_verifier *verifier, grpc_pollset *pollset, jose_header *header,
-    grpc_jwt_claims *claims, const char *audience, gpr_slice signature,
+    grpc_jwt_claims *claims, const char *audience, grpc_slice signature,
     const char *signed_jwt, size_t signed_jwt_len, void *user_data,
     grpc_jwt_verification_done_cb cb) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -355,7 +355,7 @@ static verifier_cb_ctx *verifier_cb_ctx_create(
   ctx->audience = gpr_strdup(audience);
   ctx->claims = claims;
   ctx->signature = signature;
-  ctx->signed_data = gpr_slice_from_copied_buffer(signed_jwt, signed_jwt_len);
+  ctx->signed_data = grpc_slice_from_copied_buffer(signed_jwt, signed_jwt_len);
   ctx->user_data = user_data;
   ctx->user_cb = cb;
   grpc_exec_ctx_finish(&exec_ctx);
@@ -365,8 +365,8 @@ static verifier_cb_ctx *verifier_cb_ctx_create(
 void verifier_cb_ctx_destroy(verifier_cb_ctx *ctx) {
   if (ctx->audience != NULL) gpr_free(ctx->audience);
   if (ctx->claims != NULL) grpc_jwt_claims_destroy(ctx->claims);
-  gpr_slice_unref(ctx->signature);
-  gpr_slice_unref(ctx->signed_data);
+  grpc_slice_unref(ctx->signature);
+  grpc_slice_unref(ctx->signed_data);
   jose_header_destroy(ctx->header);
   for (size_t i = 0; i < HTTP_RESPONSE_COUNT; i++) {
     grpc_http_response_destroy(&ctx->responses[i]);
@@ -449,17 +449,17 @@ end:
 
 static BIGNUM *bignum_from_base64(const char *b64) {
   BIGNUM *result = NULL;
-  gpr_slice bin;
+  grpc_slice bin;
 
   if (b64 == NULL) return NULL;
   bin = grpc_base64_decode(b64, 1);
-  if (GPR_SLICE_IS_EMPTY(bin)) {
+  if (GRPC_SLICE_IS_EMPTY(bin)) {
     gpr_log(GPR_ERROR, "Invalid base64 for big num.");
     return NULL;
   }
-  result = BN_bin2bn(GPR_SLICE_START_PTR(bin),
-                     TSI_SIZE_AS_SIZE(GPR_SLICE_LENGTH(bin)), NULL);
-  gpr_slice_unref(bin);
+  result = BN_bin2bn(GRPC_SLICE_START_PTR(bin),
+                     TSI_SIZE_AS_SIZE(GRPC_SLICE_LENGTH(bin)), NULL);
+  grpc_slice_unref(bin);
   return result;
 }
 
@@ -553,7 +553,7 @@ static EVP_PKEY *find_verification_key(const grpc_json *json,
 }
 
 static int verify_jwt_signature(EVP_PKEY *key, const char *alg,
-                                gpr_slice signature, gpr_slice signed_data) {
+                                grpc_slice signature, grpc_slice signed_data) {
   EVP_MD_CTX *md_ctx = EVP_MD_CTX_create();
   const EVP_MD *md = evp_md_from_alg(alg);
   int result = 0;
@@ -567,13 +567,13 @@ static int verify_jwt_signature(EVP_PKEY *key, const char *alg,
     gpr_log(GPR_ERROR, "EVP_DigestVerifyInit failed.");
     goto end;
   }
-  if (EVP_DigestVerifyUpdate(md_ctx, GPR_SLICE_START_PTR(signed_data),
-                             GPR_SLICE_LENGTH(signed_data)) != 1) {
+  if (EVP_DigestVerifyUpdate(md_ctx, GRPC_SLICE_START_PTR(signed_data),
+                             GRPC_SLICE_LENGTH(signed_data)) != 1) {
     gpr_log(GPR_ERROR, "EVP_DigestVerifyUpdate failed.");
     goto end;
   }
-  if (EVP_DigestVerifyFinal(md_ctx, GPR_SLICE_START_PTR(signature),
-                            GPR_SLICE_LENGTH(signature)) != 1) {
+  if (EVP_DigestVerifyFinal(md_ctx, GRPC_SLICE_START_PTR(signature),
+                            GRPC_SLICE_LENGTH(signature)) != 1) {
     gpr_log(GPR_ERROR, "JWT signature verification failed.");
     goto end;
   }
@@ -799,9 +799,9 @@ void grpc_jwt_verifier_verify(grpc_exec_ctx *exec_ctx,
   grpc_json *json;
   jose_header *header = NULL;
   grpc_jwt_claims *claims = NULL;
-  gpr_slice header_buffer;
-  gpr_slice claims_buffer;
-  gpr_slice signature;
+  grpc_slice header_buffer;
+  grpc_slice claims_buffer;
+  grpc_slice signature;
   size_t signed_jwt_len;
   const char *cur = jwt;
 
@@ -824,7 +824,7 @@ void grpc_jwt_verifier_verify(grpc_exec_ctx *exec_ctx,
   signed_jwt_len = (size_t)(dot - jwt);
   cur = dot + 1;
   signature = grpc_base64_decode(cur, 1);
-  if (GPR_SLICE_IS_EMPTY(signature)) goto error;
+  if (GRPC_SLICE_IS_EMPTY(signature)) goto error;
   retrieve_key_and_verify(
       exec_ctx,
       verifier_cb_ctx_create(verifier, pollset, header, claims, audience,
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.h b/src/core/lib/security/credentials/jwt/jwt_verifier.h
index b0f6d1c240..f09f9d5d47 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.h
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.h
@@ -37,7 +37,7 @@
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/json/json.h"
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include <grpc/support/time.h>
 
 /* --- Constants. --- */
@@ -129,7 +129,7 @@ void grpc_jwt_verifier_verify(grpc_exec_ctx *exec_ctx,
 
 /* --- TESTING ONLY exposed functions. --- */
 
-grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, gpr_slice buffer);
+grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, grpc_slice buffer);
 grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims *claims,
                                                const char *audience);
 
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
index d980577c46..b3625b22c0 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
@@ -392,15 +392,32 @@ grpc_refresh_token_credentials_create_from_auth_refresh_token(
   return &c->base.base;
 }
 
+static char *create_loggable_refresh_token(grpc_auth_refresh_token *token) {
+  if (strcmp(token->type, GRPC_AUTH_JSON_TYPE_INVALID) == 0) {
+    return gpr_strdup("<Invalid json token>");
+  }
+  char *loggable_token = NULL;
+  gpr_asprintf(&loggable_token,
+               "{\n type: %s\n client_id: %s\n client_secret: "
+               "<redacted>\n refresh_token: <redacted>\n}",
+               token->type, token->client_id);
+  return loggable_token;
+}
+
 grpc_call_credentials *grpc_google_refresh_token_credentials_create(
     const char *json_refresh_token, void *reserved) {
-  GRPC_API_TRACE(
-      "grpc_refresh_token_credentials_create(json_refresh_token=%s, "
-      "reserved=%p)",
-      2, (json_refresh_token, reserved));
+  grpc_auth_refresh_token token =
+      grpc_auth_refresh_token_create_from_string(json_refresh_token);
+  if (grpc_api_trace) {
+    char *loggable_token = create_loggable_refresh_token(&token);
+    gpr_log(GPR_INFO,
+            "grpc_refresh_token_credentials_create(json_refresh_token=%s, "
+            "reserved=%p)",
+            loggable_token, reserved);
+    gpr_free(loggable_token);
+  }
   GPR_ASSERT(reserved == NULL);
-  return grpc_refresh_token_credentials_create_from_auth_refresh_token(
-      grpc_auth_refresh_token_create_from_string(json_refresh_token));
+  return grpc_refresh_token_credentials_create_from_auth_refresh_token(token);
 }
 
 //
@@ -430,9 +447,9 @@ grpc_call_credentials *grpc_access_token_credentials_create(
       gpr_malloc(sizeof(grpc_access_token_credentials));
   char *token_md_value;
   GRPC_API_TRACE(
-      "grpc_access_token_credentials_create(access_token=%s, "
+      "grpc_access_token_credentials_create(access_token=<redacted>, "
       "reserved=%p)",
-      2, (access_token, reserved));
+      1, (reserved));
   GPR_ASSERT(reserved == NULL);
   memset(c, 0, sizeof(grpc_access_token_credentials));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2;
diff --git a/src/core/lib/security/credentials/plugin/plugin_credentials.c b/src/core/lib/security/credentials/plugin/plugin_credentials.c
index 905de3723e..5d950098a0 100644
--- a/src/core/lib/security/credentials/plugin/plugin_credentials.c
+++ b/src/core/lib/security/credentials/plugin/plugin_credentials.c
@@ -93,17 +93,19 @@ static void plugin_md_request_metadata_ready(void *request,
     } else if (num_md > 0) {
       md_array = gpr_malloc(num_md * sizeof(grpc_credentials_md));
       for (i = 0; i < num_md; i++) {
-        md_array[i].key = gpr_slice_from_copied_string(md[i].key);
+        md_array[i].key = grpc_slice_from_copied_string(md[i].key);
         md_array[i].value =
-            gpr_slice_from_copied_buffer(md[i].value, md[i].value_length);
+            grpc_slice_from_copied_buffer(md[i].value, md[i].value_length);
       }
       r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK,
             NULL);
       for (i = 0; i < num_md; i++) {
-        gpr_slice_unref(md_array[i].key);
-        gpr_slice_unref(md_array[i].value);
+        grpc_slice_unref(md_array[i].key);
+        grpc_slice_unref(md_array[i].value);
       }
       gpr_free(md_array);
+    } else if (num_md == 0) {
+      r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_OK, NULL);
     }
   }
   gpr_free(r);
diff --git a/src/core/lib/security/transport/client_auth_filter.c b/src/core/lib/security/transport/client_auth_filter.c
index b366d1410f..da897296e4 100644
--- a/src/core/lib/security/transport/client_auth_filter.c
+++ b/src/core/lib/security/transport/client_auth_filter.c
@@ -92,7 +92,7 @@ static void bubble_up_error(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                             grpc_status_code status, const char *error_msg) {
   call_data *calld = elem->call_data;
   gpr_log(GPR_ERROR, "Client side authentication failure: %s", error_msg);
-  gpr_slice error_slice = gpr_slice_from_copied_string(error_msg);
+  grpc_slice error_slice = grpc_slice_from_copied_string(error_msg);
   grpc_transport_stream_op_add_close(&calld->op, status, &error_slice);
   grpc_call_next_op(exec_ctx, elem, &calld->op);
 }
@@ -121,8 +121,8 @@ static void on_credentials_metadata(grpc_exec_ctx *exec_ctx, void *user_data,
   for (i = 0; i < num_md; i++) {
     grpc_metadata_batch_add_tail(
         mdb, &calld->md_links[i],
-        grpc_mdelem_from_slices(gpr_slice_ref(md_elems[i].key),
-                                gpr_slice_ref(md_elems[i].value)));
+        grpc_mdelem_from_slices(grpc_slice_ref(md_elems[i].key),
+                                grpc_slice_ref(md_elems[i].value)));
   }
   grpc_call_next_op(exec_ctx, elem, op);
 }
@@ -303,9 +303,9 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
 }
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   grpc_security_connector *sc =
       grpc_find_security_connector_in_args(args->channel_args);
   grpc_auth_context *auth_context =
@@ -327,6 +327,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
           sc, "client_auth_filter");
   chand->auth_context =
       GRPC_AUTH_CONTEXT_REF(auth_context, "client_auth_filter");
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -341,14 +342,8 @@ static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "client_auth_filter");
 }
 
-const grpc_channel_filter grpc_client_auth_filter = {auth_start_transport_op,
-                                                     grpc_channel_next_op,
-                                                     sizeof(call_data),
-                                                     init_call_elem,
-                                                     set_pollset_or_pollset_set,
-                                                     destroy_call_elem,
-                                                     sizeof(channel_data),
-                                                     init_channel_elem,
-                                                     destroy_channel_elem,
-                                                     grpc_call_next_get_peer,
-                                                     "client-auth"};
+const grpc_channel_filter grpc_client_auth_filter = {
+    auth_start_transport_op, grpc_channel_next_op,       sizeof(call_data),
+    init_call_elem,          set_pollset_or_pollset_set, destroy_call_elem,
+    sizeof(channel_data),    init_channel_elem,          destroy_channel_elem,
+    grpc_call_next_get_peer, grpc_channel_next_get_info, "client-auth"};
diff --git a/src/core/lib/security/transport/handshake.c b/src/core/lib/security/transport/handshake.c
deleted file mode 100644
index fbeec312b6..0000000000
--- a/src/core/lib/security/transport/handshake.c
+++ /dev/null
@@ -1,374 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/lib/security/transport/handshake.h"
-
-#include <stdbool.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
-#include "src/core/lib/iomgr/timer.h"
-#include "src/core/lib/security/context/security_context.h"
-#include "src/core/lib/security/transport/secure_endpoint.h"
-#include "src/core/lib/security/transport/tsi_error.h"
-
-#define GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE 256
-
-typedef struct {
-  grpc_security_connector *connector;
-  tsi_handshaker *handshaker;
-  bool is_client_side;
-  unsigned char *handshake_buffer;
-  size_t handshake_buffer_size;
-  grpc_endpoint *wrapped_endpoint;
-  grpc_endpoint *secure_endpoint;
-  gpr_slice_buffer left_overs;
-  gpr_slice_buffer incoming;
-  gpr_slice_buffer outgoing;
-  grpc_security_handshake_done_cb cb;
-  void *user_data;
-  grpc_closure on_handshake_data_sent_to_peer;
-  grpc_closure on_handshake_data_received_from_peer;
-  grpc_auth_context *auth_context;
-  grpc_timer timer;
-  gpr_refcount refs;
-} grpc_security_handshake;
-
-static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
-                                                 void *setup,
-                                                 grpc_error *error);
-
-static void on_handshake_data_sent_to_peer(grpc_exec_ctx *exec_ctx, void *setup,
-                                           grpc_error *error);
-
-static void security_connector_remove_handshake(grpc_security_handshake *h) {
-  GPR_ASSERT(!h->is_client_side);
-  grpc_security_connector_handshake_list *node;
-  grpc_security_connector_handshake_list *tmp;
-  grpc_server_security_connector *sc =
-      (grpc_server_security_connector *)h->connector;
-  gpr_mu_lock(&sc->mu);
-  node = sc->handshaking_handshakes;
-  if (node && node->handshake == h) {
-    sc->handshaking_handshakes = node->next;
-    gpr_free(node);
-    gpr_mu_unlock(&sc->mu);
-    return;
-  }
-  while (node) {
-    if (node->next->handshake == h) {
-      tmp = node->next;
-      node->next = node->next->next;
-      gpr_free(tmp);
-      gpr_mu_unlock(&sc->mu);
-      return;
-    }
-    node = node->next;
-  }
-  gpr_mu_unlock(&sc->mu);
-}
-
-static void unref_handshake(grpc_security_handshake *h) {
-  if (gpr_unref(&h->refs)) {
-    if (h->handshaker != NULL) tsi_handshaker_destroy(h->handshaker);
-    if (h->handshake_buffer != NULL) gpr_free(h->handshake_buffer);
-    gpr_slice_buffer_destroy(&h->left_overs);
-    gpr_slice_buffer_destroy(&h->outgoing);
-    gpr_slice_buffer_destroy(&h->incoming);
-    GRPC_AUTH_CONTEXT_UNREF(h->auth_context, "handshake");
-    GRPC_SECURITY_CONNECTOR_UNREF(h->connector, "handshake");
-    gpr_free(h);
-  }
-}
-
-static void security_handshake_done(grpc_exec_ctx *exec_ctx,
-                                    grpc_security_handshake *h,
-                                    grpc_error *error) {
-  grpc_timer_cancel(exec_ctx, &h->timer);
-  if (!h->is_client_side) {
-    security_connector_remove_handshake(h);
-  }
-  if (error == GRPC_ERROR_NONE) {
-    h->cb(exec_ctx, h->user_data, GRPC_SECURITY_OK, h->secure_endpoint,
-          h->auth_context);
-  } else {
-    const char *msg = grpc_error_string(error);
-    gpr_log(GPR_ERROR, "Security handshake failed: %s", msg);
-    grpc_error_free_string(msg);
-
-    if (h->secure_endpoint != NULL) {
-      grpc_endpoint_shutdown(exec_ctx, h->secure_endpoint);
-      grpc_endpoint_destroy(exec_ctx, h->secure_endpoint);
-    } else {
-      grpc_endpoint_destroy(exec_ctx, h->wrapped_endpoint);
-    }
-    h->cb(exec_ctx, h->user_data, GRPC_SECURITY_ERROR, NULL, NULL);
-  }
-  unref_handshake(h);
-  GRPC_ERROR_UNREF(error);
-}
-
-static void on_peer_checked(grpc_exec_ctx *exec_ctx, void *user_data,
-                            grpc_security_status status,
-                            grpc_auth_context *auth_context) {
-  grpc_security_handshake *h = user_data;
-  tsi_frame_protector *protector;
-  tsi_result result;
-  if (status != GRPC_SECURITY_OK) {
-    security_handshake_done(
-        exec_ctx, h,
-        grpc_error_set_int(GRPC_ERROR_CREATE("Error checking peer."),
-                           GRPC_ERROR_INT_SECURITY_STATUS, status));
-    return;
-  }
-  h->auth_context = GRPC_AUTH_CONTEXT_REF(auth_context, "handshake");
-  result =
-      tsi_handshaker_create_frame_protector(h->handshaker, NULL, &protector);
-  if (result != TSI_OK) {
-    security_handshake_done(
-        exec_ctx, h,
-        grpc_set_tsi_error_result(
-            GRPC_ERROR_CREATE("Frame protector creation failed"), result));
-    return;
-  }
-  h->secure_endpoint =
-      grpc_secure_endpoint_create(protector, h->wrapped_endpoint,
-                                  h->left_overs.slices, h->left_overs.count);
-  h->left_overs.count = 0;
-  h->left_overs.length = 0;
-  security_handshake_done(exec_ctx, h, GRPC_ERROR_NONE);
-  return;
-}
-
-static void check_peer(grpc_exec_ctx *exec_ctx, grpc_security_handshake *h) {
-  tsi_peer peer;
-  tsi_result result = tsi_handshaker_extract_peer(h->handshaker, &peer);
-
-  if (result != TSI_OK) {
-    security_handshake_done(
-        exec_ctx, h, grpc_set_tsi_error_result(
-                         GRPC_ERROR_CREATE("Peer extraction failed"), result));
-    return;
-  }
-  grpc_security_connector_check_peer(exec_ctx, h->connector, peer,
-                                     on_peer_checked, h);
-}
-
-static void send_handshake_bytes_to_peer(grpc_exec_ctx *exec_ctx,
-                                         grpc_security_handshake *h) {
-  size_t offset = 0;
-  tsi_result result = TSI_OK;
-  gpr_slice to_send;
-
-  do {
-    size_t to_send_size = h->handshake_buffer_size - offset;
-    result = tsi_handshaker_get_bytes_to_send_to_peer(
-        h->handshaker, h->handshake_buffer + offset, &to_send_size);
-    offset += to_send_size;
-    if (result == TSI_INCOMPLETE_DATA) {
-      h->handshake_buffer_size *= 2;
-      h->handshake_buffer =
-          gpr_realloc(h->handshake_buffer, h->handshake_buffer_size);
-    }
-  } while (result == TSI_INCOMPLETE_DATA);
-
-  if (result != TSI_OK) {
-    security_handshake_done(exec_ctx, h,
-                            grpc_set_tsi_error_result(
-                                GRPC_ERROR_CREATE("Handshake failed"), result));
-    return;
-  }
-
-  to_send =
-      gpr_slice_from_copied_buffer((const char *)h->handshake_buffer, offset);
-  gpr_slice_buffer_reset_and_unref(&h->outgoing);
-  gpr_slice_buffer_add(&h->outgoing, to_send);
-  /* TODO(klempner,jboeuf): This should probably use the client setup
-     deadline */
-  grpc_endpoint_write(exec_ctx, h->wrapped_endpoint, &h->outgoing,
-                      &h->on_handshake_data_sent_to_peer);
-}
-
-static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
-                                                 void *handshake,
-                                                 grpc_error *error) {
-  grpc_security_handshake *h = handshake;
-  size_t consumed_slice_size = 0;
-  tsi_result result = TSI_OK;
-  size_t i;
-  size_t num_left_overs;
-  int has_left_overs_in_current_slice = 0;
-
-  if (error != GRPC_ERROR_NONE) {
-    security_handshake_done(
-        exec_ctx, h,
-        GRPC_ERROR_CREATE_REFERENCING("Handshake read failed", &error, 1));
-    return;
-  }
-
-  for (i = 0; i < h->incoming.count; i++) {
-    consumed_slice_size = GPR_SLICE_LENGTH(h->incoming.slices[i]);
-    result = tsi_handshaker_process_bytes_from_peer(
-        h->handshaker, GPR_SLICE_START_PTR(h->incoming.slices[i]),
-        &consumed_slice_size);
-    if (!tsi_handshaker_is_in_progress(h->handshaker)) break;
-  }
-
-  if (tsi_handshaker_is_in_progress(h->handshaker)) {
-    /* We may need more data. */
-    if (result == TSI_INCOMPLETE_DATA) {
-      grpc_endpoint_read(exec_ctx, h->wrapped_endpoint, &h->incoming,
-                         &h->on_handshake_data_received_from_peer);
-      return;
-    } else {
-      send_handshake_bytes_to_peer(exec_ctx, h);
-      return;
-    }
-  }
-
-  if (result != TSI_OK) {
-    security_handshake_done(exec_ctx, h,
-                            grpc_set_tsi_error_result(
-                                GRPC_ERROR_CREATE("Handshake failed"), result));
-    return;
-  }
-
-  /* Handshake is done and successful this point. */
-  has_left_overs_in_current_slice =
-      (consumed_slice_size < GPR_SLICE_LENGTH(h->incoming.slices[i]));
-  num_left_overs =
-      (has_left_overs_in_current_slice ? 1 : 0) + h->incoming.count - i - 1;
-  if (num_left_overs == 0) {
-    check_peer(exec_ctx, h);
-    return;
-  }
-
-  /* Put the leftovers in our buffer (ownership transfered). */
-  if (has_left_overs_in_current_slice) {
-    gpr_slice_buffer_add(
-        &h->left_overs,
-        gpr_slice_split_tail(&h->incoming.slices[i], consumed_slice_size));
-    gpr_slice_unref(
-        h->incoming.slices[i]); /* split_tail above increments refcount. */
-  }
-  gpr_slice_buffer_addn(
-      &h->left_overs, &h->incoming.slices[i + 1],
-      num_left_overs - (size_t)has_left_overs_in_current_slice);
-  check_peer(exec_ctx, h);
-}
-
-/* If handshake is NULL, the handshake is done. */
-static void on_handshake_data_sent_to_peer(grpc_exec_ctx *exec_ctx,
-                                           void *handshake, grpc_error *error) {
-  grpc_security_handshake *h = handshake;
-
-  /* Make sure that write is OK. */
-  if (error != GRPC_ERROR_NONE) {
-    if (handshake != NULL)
-      security_handshake_done(
-          exec_ctx, h,
-          GRPC_ERROR_CREATE_REFERENCING("Handshake write failed", &error, 1));
-    return;
-  }
-
-  /* We may be done. */
-  if (tsi_handshaker_is_in_progress(h->handshaker)) {
-    /* TODO(klempner,jboeuf): This should probably use the client setup
-       deadline */
-    grpc_endpoint_read(exec_ctx, h->wrapped_endpoint, &h->incoming,
-                       &h->on_handshake_data_received_from_peer);
-  } else {
-    check_peer(exec_ctx, h);
-  }
-}
-
-static void on_timeout(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  grpc_security_handshake *h = arg;
-  if (error == GRPC_ERROR_NONE) {
-    grpc_endpoint_shutdown(exec_ctx, h->wrapped_endpoint);
-  }
-  unref_handshake(h);
-}
-
-void grpc_do_security_handshake(
-    grpc_exec_ctx *exec_ctx, tsi_handshaker *handshaker,
-    grpc_security_connector *connector, bool is_client_side,
-    grpc_endpoint *nonsecure_endpoint, gpr_slice_buffer *read_buffer,
-    gpr_timespec deadline, grpc_security_handshake_done_cb cb,
-    void *user_data) {
-  grpc_security_connector_handshake_list *handshake_node;
-  grpc_security_handshake *h = gpr_malloc(sizeof(grpc_security_handshake));
-  memset(h, 0, sizeof(grpc_security_handshake));
-  h->handshaker = handshaker;
-  h->connector = GRPC_SECURITY_CONNECTOR_REF(connector, "handshake");
-  h->is_client_side = is_client_side;
-  h->handshake_buffer_size = GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE;
-  h->handshake_buffer = gpr_malloc(h->handshake_buffer_size);
-  h->wrapped_endpoint = nonsecure_endpoint;
-  h->user_data = user_data;
-  h->cb = cb;
-  gpr_ref_init(&h->refs, 2); /* timer and handshake proper each get a ref */
-  grpc_closure_init(&h->on_handshake_data_sent_to_peer,
-                    on_handshake_data_sent_to_peer, h);
-  grpc_closure_init(&h->on_handshake_data_received_from_peer,
-                    on_handshake_data_received_from_peer, h);
-  gpr_slice_buffer_init(&h->left_overs);
-  gpr_slice_buffer_init(&h->outgoing);
-  gpr_slice_buffer_init(&h->incoming);
-  if (read_buffer != NULL) {
-    gpr_slice_buffer_move_into(read_buffer, &h->incoming);
-    gpr_free(read_buffer);
-  }
-  if (!is_client_side) {
-    grpc_server_security_connector *server_connector =
-        (grpc_server_security_connector *)connector;
-    handshake_node = gpr_malloc(sizeof(grpc_security_connector_handshake_list));
-    handshake_node->handshake = h;
-    gpr_mu_lock(&server_connector->mu);
-    handshake_node->next = server_connector->handshaking_handshakes;
-    server_connector->handshaking_handshakes = handshake_node;
-    gpr_mu_unlock(&server_connector->mu);
-  }
-  send_handshake_bytes_to_peer(exec_ctx, h);
-  grpc_timer_init(exec_ctx, &h->timer,
-                  gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
-                  on_timeout, h, gpr_now(GPR_CLOCK_MONOTONIC));
-}
-
-void grpc_security_handshake_shutdown(grpc_exec_ctx *exec_ctx,
-                                      void *handshake) {
-  grpc_security_handshake *h = handshake;
-  grpc_endpoint_shutdown(exec_ctx, h->wrapped_endpoint);
-}
diff --git a/src/core/lib/security/transport/secure_endpoint.c b/src/core/lib/security/transport/secure_endpoint.c
index 3924997d31..331a8f1835 100644
--- a/src/core/lib/security/transport/secure_endpoint.c
+++ b/src/core/lib/security/transport/secure_endpoint.c
@@ -31,15 +31,22 @@
  *
  */
 
-#include "src/core/lib/security/transport/secure_endpoint.h"
+/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
+   using that endpoint. Because of various transitive includes in uv.h,
+   including windows.h on Windows, uv.h must be included before other system
+   headers. Therefore, sockaddr.h must always be included first */
+#include "src/core/lib/iomgr/sockaddr.h"
+
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/sync.h>
 #include "src/core/lib/debug/trace.h"
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/security/transport/secure_endpoint.h"
 #include "src/core/lib/security/transport/tsi_error.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/tsi/transport_security_interface.h"
 
@@ -54,15 +61,15 @@ typedef struct {
   grpc_closure *read_cb;
   grpc_closure *write_cb;
   grpc_closure on_read;
-  gpr_slice_buffer *read_buffer;
-  gpr_slice_buffer source_buffer;
+  grpc_slice_buffer *read_buffer;
+  grpc_slice_buffer source_buffer;
   /* saved handshaker leftover data to unprotect. */
-  gpr_slice_buffer leftover_bytes;
+  grpc_slice_buffer leftover_bytes;
   /* buffers for read and write */
-  gpr_slice read_staging_buffer;
+  grpc_slice read_staging_buffer;
 
-  gpr_slice write_staging_buffer;
-  gpr_slice_buffer output_buffer;
+  grpc_slice write_staging_buffer;
+  grpc_slice_buffer output_buffer;
 
   gpr_refcount ref;
 } secure_endpoint;
@@ -73,11 +80,11 @@ static void destroy(grpc_exec_ctx *exec_ctx, secure_endpoint *secure_ep) {
   secure_endpoint *ep = secure_ep;
   grpc_endpoint_destroy(exec_ctx, ep->wrapped_ep);
   tsi_frame_protector_destroy(ep->protector);
-  gpr_slice_buffer_destroy(&ep->leftover_bytes);
-  gpr_slice_unref(ep->read_staging_buffer);
-  gpr_slice_unref(ep->write_staging_buffer);
-  gpr_slice_buffer_destroy(&ep->output_buffer);
-  gpr_slice_buffer_destroy(&ep->source_buffer);
+  grpc_slice_buffer_destroy(&ep->leftover_bytes);
+  grpc_slice_unref(ep->read_staging_buffer);
+  grpc_slice_unref(ep->write_staging_buffer);
+  grpc_slice_buffer_destroy(&ep->output_buffer);
+  grpc_slice_buffer_destroy(&ep->source_buffer);
   gpr_mu_destroy(&ep->protector_mu);
   gpr_free(ep);
 }
@@ -121,10 +128,10 @@ static void secure_endpoint_ref(secure_endpoint *ep) { gpr_ref(&ep->ref); }
 
 static void flush_read_staging_buffer(secure_endpoint *ep, uint8_t **cur,
                                       uint8_t **end) {
-  gpr_slice_buffer_add(ep->read_buffer, ep->read_staging_buffer);
-  ep->read_staging_buffer = gpr_slice_malloc(STAGING_BUFFER_SIZE);
-  *cur = GPR_SLICE_START_PTR(ep->read_staging_buffer);
-  *end = GPR_SLICE_END_PTR(ep->read_staging_buffer);
+  grpc_slice_buffer_add(ep->read_buffer, ep->read_staging_buffer);
+  ep->read_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
+  *cur = GRPC_SLICE_START_PTR(ep->read_staging_buffer);
+  *end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 }
 
 static void call_read_cb(grpc_exec_ctx *exec_ctx, secure_endpoint *ep,
@@ -132,8 +139,8 @@ static void call_read_cb(grpc_exec_ctx *exec_ctx, secure_endpoint *ep,
   if (grpc_trace_secure_endpoint) {
     size_t i;
     for (i = 0; i < ep->read_buffer->count; i++) {
-      char *data = gpr_dump_slice(ep->read_buffer->slices[i],
-                                  GPR_DUMP_HEX | GPR_DUMP_ASCII);
+      char *data = grpc_dump_slice(ep->read_buffer->slices[i],
+                                   GPR_DUMP_HEX | GPR_DUMP_ASCII);
       gpr_log(GPR_DEBUG, "READ %p: %s", ep, data);
       gpr_free(data);
     }
@@ -149,11 +156,11 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data,
   uint8_t keep_looping = 0;
   tsi_result result = TSI_OK;
   secure_endpoint *ep = (secure_endpoint *)user_data;
-  uint8_t *cur = GPR_SLICE_START_PTR(ep->read_staging_buffer);
-  uint8_t *end = GPR_SLICE_END_PTR(ep->read_staging_buffer);
+  uint8_t *cur = GRPC_SLICE_START_PTR(ep->read_staging_buffer);
+  uint8_t *end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 
   if (error != GRPC_ERROR_NONE) {
-    gpr_slice_buffer_reset_and_unref(ep->read_buffer);
+    grpc_slice_buffer_reset_and_unref(ep->read_buffer);
     call_read_cb(exec_ctx, ep, GRPC_ERROR_CREATE_REFERENCING(
                                    "Secure read failed", &error, 1));
     return;
@@ -161,9 +168,9 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data,
 
   /* TODO(yangg) check error, maybe bail out early */
   for (i = 0; i < ep->source_buffer.count; i++) {
-    gpr_slice encrypted = ep->source_buffer.slices[i];
-    uint8_t *message_bytes = GPR_SLICE_START_PTR(encrypted);
-    size_t message_size = GPR_SLICE_LENGTH(encrypted);
+    grpc_slice encrypted = ep->source_buffer.slices[i];
+    uint8_t *message_bytes = GRPC_SLICE_START_PTR(encrypted);
+    size_t message_size = GRPC_SLICE_LENGTH(encrypted);
 
     while (message_size > 0 || keep_looping) {
       size_t unprotected_buffer_size_written = (size_t)(end - cur);
@@ -198,20 +205,20 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data,
     if (result != TSI_OK) break;
   }
 
-  if (cur != GPR_SLICE_START_PTR(ep->read_staging_buffer)) {
-    gpr_slice_buffer_add(
+  if (cur != GRPC_SLICE_START_PTR(ep->read_staging_buffer)) {
+    grpc_slice_buffer_add(
         ep->read_buffer,
-        gpr_slice_split_head(
+        grpc_slice_split_head(
             &ep->read_staging_buffer,
-            (size_t)(cur - GPR_SLICE_START_PTR(ep->read_staging_buffer))));
+            (size_t)(cur - GRPC_SLICE_START_PTR(ep->read_staging_buffer))));
   }
 
   /* TODO(yangg) experiment with moving this block after read_cb to see if it
      helps latency */
-  gpr_slice_buffer_reset_and_unref(&ep->source_buffer);
+  grpc_slice_buffer_reset_and_unref(&ep->source_buffer);
 
   if (result != TSI_OK) {
-    gpr_slice_buffer_reset_and_unref(ep->read_buffer);
+    grpc_slice_buffer_reset_and_unref(ep->read_buffer);
     call_read_cb(exec_ctx, ep, grpc_set_tsi_error_result(
                                    GRPC_ERROR_CREATE("Unwrap failed"), result));
     return;
@@ -221,15 +228,15 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data,
 }
 
 static void endpoint_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *secure_ep,
-                          gpr_slice_buffer *slices, grpc_closure *cb) {
+                          grpc_slice_buffer *slices, grpc_closure *cb) {
   secure_endpoint *ep = (secure_endpoint *)secure_ep;
   ep->read_cb = cb;
   ep->read_buffer = slices;
-  gpr_slice_buffer_reset_and_unref(ep->read_buffer);
+  grpc_slice_buffer_reset_and_unref(ep->read_buffer);
 
   SECURE_ENDPOINT_REF(ep, "read");
   if (ep->leftover_bytes.count) {
-    gpr_slice_buffer_swap(&ep->leftover_bytes, &ep->source_buffer);
+    grpc_slice_buffer_swap(&ep->leftover_bytes, &ep->source_buffer);
     GPR_ASSERT(ep->leftover_bytes.count == 0);
     on_read(exec_ctx, ep, GRPC_ERROR_NONE);
     return;
@@ -241,37 +248,37 @@ static void endpoint_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *secure_ep,
 
 static void flush_write_staging_buffer(secure_endpoint *ep, uint8_t **cur,
                                        uint8_t **end) {
-  gpr_slice_buffer_add(&ep->output_buffer, ep->write_staging_buffer);
-  ep->write_staging_buffer = gpr_slice_malloc(STAGING_BUFFER_SIZE);
-  *cur = GPR_SLICE_START_PTR(ep->write_staging_buffer);
-  *end = GPR_SLICE_END_PTR(ep->write_staging_buffer);
+  grpc_slice_buffer_add(&ep->output_buffer, ep->write_staging_buffer);
+  ep->write_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
+  *cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
+  *end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 }
 
 static void endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *secure_ep,
-                           gpr_slice_buffer *slices, grpc_closure *cb) {
+                           grpc_slice_buffer *slices, grpc_closure *cb) {
   GPR_TIMER_BEGIN("secure_endpoint.endpoint_write", 0);
 
   unsigned i;
   tsi_result result = TSI_OK;
   secure_endpoint *ep = (secure_endpoint *)secure_ep;
-  uint8_t *cur = GPR_SLICE_START_PTR(ep->write_staging_buffer);
-  uint8_t *end = GPR_SLICE_END_PTR(ep->write_staging_buffer);
+  uint8_t *cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
+  uint8_t *end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 
-  gpr_slice_buffer_reset_and_unref(&ep->output_buffer);
+  grpc_slice_buffer_reset_and_unref(&ep->output_buffer);
 
   if (grpc_trace_secure_endpoint) {
     for (i = 0; i < slices->count; i++) {
       char *data =
-          gpr_dump_slice(slices->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII);
+          grpc_dump_slice(slices->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII);
       gpr_log(GPR_DEBUG, "WRITE %p: %s", ep, data);
       gpr_free(data);
     }
   }
 
   for (i = 0; i < slices->count; i++) {
-    gpr_slice plain = slices->slices[i];
-    uint8_t *message_bytes = GPR_SLICE_START_PTR(plain);
-    size_t message_size = GPR_SLICE_LENGTH(plain);
+    grpc_slice plain = slices->slices[i];
+    uint8_t *message_bytes = GRPC_SLICE_START_PTR(plain);
+    size_t message_size = GRPC_SLICE_LENGTH(plain);
     while (message_size > 0) {
       size_t protected_buffer_size_to_send = (size_t)(end - cur);
       size_t processed_message_size = message_size;
@@ -310,18 +317,18 @@ static void endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *secure_ep,
         flush_write_staging_buffer(ep, &cur, &end);
       }
     } while (still_pending_size > 0);
-    if (cur != GPR_SLICE_START_PTR(ep->write_staging_buffer)) {
-      gpr_slice_buffer_add(
+    if (cur != GRPC_SLICE_START_PTR(ep->write_staging_buffer)) {
+      grpc_slice_buffer_add(
           &ep->output_buffer,
-          gpr_slice_split_head(
+          grpc_slice_split_head(
               &ep->write_staging_buffer,
-              (size_t)(cur - GPR_SLICE_START_PTR(ep->write_staging_buffer))));
+              (size_t)(cur - GRPC_SLICE_START_PTR(ep->write_staging_buffer))));
     }
   }
 
   if (result != TSI_OK) {
     /* TODO(yangg) do different things according to the error type? */
-    gpr_slice_buffer_reset_and_unref(&ep->output_buffer);
+    grpc_slice_buffer_reset_and_unref(&ep->output_buffer);
     grpc_exec_ctx_sched(
         exec_ctx, cb,
         grpc_set_tsi_error_result(GRPC_ERROR_CREATE("Wrap failed"), result),
@@ -365,6 +372,11 @@ static char *endpoint_get_peer(grpc_endpoint *secure_ep) {
   return grpc_endpoint_get_peer(ep->wrapped_ep);
 }
 
+static int endpoint_get_fd(grpc_endpoint *secure_ep) {
+  secure_endpoint *ep = (secure_endpoint *)secure_ep;
+  return grpc_endpoint_get_fd(ep->wrapped_ep);
+}
+
 static grpc_workqueue *endpoint_get_workqueue(grpc_endpoint *secure_ep) {
   secure_endpoint *ep = (secure_endpoint *)secure_ep;
   return grpc_endpoint_get_workqueue(ep->wrapped_ep);
@@ -384,25 +396,26 @@ static const grpc_endpoint_vtable vtable = {endpoint_read,
                                             endpoint_shutdown,
                                             endpoint_destroy,
                                             endpoint_get_resource_user,
-                                            endpoint_get_peer};
+                                            endpoint_get_peer,
+                                            endpoint_get_fd};
 
 grpc_endpoint *grpc_secure_endpoint_create(
     struct tsi_frame_protector *protector, grpc_endpoint *transport,
-    gpr_slice *leftover_slices, size_t leftover_nslices) {
+    grpc_slice *leftover_slices, size_t leftover_nslices) {
   size_t i;
   secure_endpoint *ep = (secure_endpoint *)gpr_malloc(sizeof(secure_endpoint));
   ep->base.vtable = &vtable;
   ep->wrapped_ep = transport;
   ep->protector = protector;
-  gpr_slice_buffer_init(&ep->leftover_bytes);
+  grpc_slice_buffer_init(&ep->leftover_bytes);
   for (i = 0; i < leftover_nslices; i++) {
-    gpr_slice_buffer_add(&ep->leftover_bytes,
-                         gpr_slice_ref(leftover_slices[i]));
+    grpc_slice_buffer_add(&ep->leftover_bytes,
+                          grpc_slice_ref(leftover_slices[i]));
   }
-  ep->write_staging_buffer = gpr_slice_malloc(STAGING_BUFFER_SIZE);
-  ep->read_staging_buffer = gpr_slice_malloc(STAGING_BUFFER_SIZE);
-  gpr_slice_buffer_init(&ep->output_buffer);
-  gpr_slice_buffer_init(&ep->source_buffer);
+  ep->write_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
+  ep->read_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
+  grpc_slice_buffer_init(&ep->output_buffer);
+  grpc_slice_buffer_init(&ep->source_buffer);
   ep->read_buffer = NULL;
   grpc_closure_init(&ep->on_read, on_read, ep);
   gpr_mu_init(&ep->protector_mu);
diff --git a/src/core/lib/security/transport/secure_endpoint.h b/src/core/lib/security/transport/secure_endpoint.h
index d00075b769..a61f40a4fa 100644
--- a/src/core/lib/security/transport/secure_endpoint.h
+++ b/src/core/lib/security/transport/secure_endpoint.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURE_ENDPOINT_H
 #define GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURE_ENDPOINT_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "src/core/lib/iomgr/endpoint.h"
 
 struct tsi_frame_protector;
@@ -44,6 +44,6 @@ extern int grpc_trace_secure_endpoint;
 /* Takes ownership of protector and to_wrap, and refs leftover_slices. */
 grpc_endpoint *grpc_secure_endpoint_create(
     struct tsi_frame_protector *protector, grpc_endpoint *to_wrap,
-    gpr_slice *leftover_slices, size_t leftover_nslices);
+    grpc_slice *leftover_slices, size_t leftover_nslices);
 
 #endif /* GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURE_ENDPOINT_H */
diff --git a/src/core/lib/security/transport/security_connector.c b/src/core/lib/security/transport/security_connector.c
index 0eca46eb52..5b088aa58d 100644
--- a/src/core/lib/security/transport/security_connector.c
+++ b/src/core/lib/security/transport/security_connector.c
@@ -36,18 +36,19 @@
 #include <stdbool.h>
 #include <string.h>
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
 #include "src/core/ext/transport/chttp2/alpn/alpn.h"
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/iomgr/load_file.h"
 #include "src/core/lib/security/context/security_context.h"
 #include "src/core/lib/security/credentials/credentials.h"
-#include "src/core/lib/security/transport/handshake.h"
 #include "src/core/lib/security/transport/secure_endpoint.h"
+#include "src/core/lib/security/transport/security_handshaker.h"
 #include "src/core/lib/support/env.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/tsi/fake_transport_security.h"
@@ -111,58 +112,34 @@ const tsi_peer_property *tsi_peer_get_property_by_name(const tsi_peer *peer,
   return NULL;
 }
 
-void grpc_server_security_connector_shutdown(
-    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *connector) {
-  grpc_security_connector_handshake_list *tmp;
-  gpr_mu_lock(&connector->mu);
-  while (connector->handshaking_handshakes) {
-    tmp = connector->handshaking_handshakes;
-    grpc_security_handshake_shutdown(
-        exec_ctx, connector->handshaking_handshakes->handshake);
-    connector->handshaking_handshakes = tmp->next;
-    gpr_free(tmp);
+void grpc_channel_security_connector_add_handshakers(
+    grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *connector,
+    grpc_handshake_manager *handshake_mgr) {
+  if (connector != NULL) {
+    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
   }
-  gpr_mu_unlock(&connector->mu);
 }
 
-void grpc_channel_security_connector_do_handshake(
-    grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
-    grpc_endpoint *nonsecure_endpoint, gpr_slice_buffer *read_buffer,
-    gpr_timespec deadline, grpc_security_handshake_done_cb cb,
-    void *user_data) {
-  if (sc == NULL || nonsecure_endpoint == NULL) {
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL);
-  } else {
-    sc->do_handshake(exec_ctx, sc, nonsecure_endpoint, read_buffer, deadline,
-                     cb, user_data);
-  }
-}
-
-void grpc_server_security_connector_do_handshake(
-    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc,
-    grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint,
-    gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-    grpc_security_handshake_done_cb cb, void *user_data) {
-  if (sc == NULL || nonsecure_endpoint == NULL) {
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL);
-  } else {
-    sc->do_handshake(exec_ctx, sc, acceptor, nonsecure_endpoint, read_buffer,
-                     deadline, cb, user_data);
+void grpc_server_security_connector_add_handshakers(
+    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *connector,
+    grpc_handshake_manager *handshake_mgr) {
+  if (connector != NULL) {
+    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
   }
 }
 
 void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx,
                                         grpc_security_connector *sc,
                                         tsi_peer peer,
-                                        grpc_security_peer_check_cb cb,
-                                        void *user_data) {
+                                        grpc_auth_context **auth_context,
+                                        grpc_closure *on_peer_checked) {
   if (sc == NULL) {
-    cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL);
+    grpc_exec_ctx_sched(
+        exec_ctx, on_peer_checked,
+        GRPC_ERROR_CREATE("cannot check peer -- no security connector"), NULL);
     tsi_peer_destruct(&peer);
   } else {
-    sc->vtable->check_peer(exec_ctx, sc, peer, cb, user_data);
+    sc->vtable->check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
   }
 }
 
@@ -210,11 +187,11 @@ void grpc_security_connector_unref(grpc_security_connector *sc) {
 }
 
 static void connector_pointer_arg_destroy(void *p) {
-  GRPC_SECURITY_CONNECTOR_UNREF(p, "connector_pointer_arg");
+  GRPC_SECURITY_CONNECTOR_UNREF(p, "connector_pointer_arg_destroy");
 }
 
 static void *connector_pointer_arg_copy(void *p) {
-  return GRPC_SECURITY_CONNECTOR_REF(p, "connector_pointer_arg");
+  return GRPC_SECURITY_CONNECTOR_REF(p, "connector_pointer_arg_copy");
 }
 
 static int connector_pointer_cmp(void *a, void *b) { return GPR_ICMP(a, b); }
@@ -262,45 +239,41 @@ static void fake_channel_destroy(grpc_security_connector *sc) {
   gpr_free(sc);
 }
 
-static void fake_server_destroy(grpc_security_connector *sc) {
-  grpc_server_security_connector *c = (grpc_server_security_connector *)sc;
-  gpr_mu_destroy(&c->mu);
-  gpr_free(sc);
-}
+static void fake_server_destroy(grpc_security_connector *sc) { gpr_free(sc); }
 
 static void fake_check_peer(grpc_exec_ctx *exec_ctx,
                             grpc_security_connector *sc, tsi_peer peer,
-                            grpc_security_peer_check_cb cb, void *user_data) {
+                            grpc_auth_context **auth_context,
+                            grpc_closure *on_peer_checked) {
   const char *prop_name;
-  grpc_security_status status = GRPC_SECURITY_OK;
-  grpc_auth_context *auth_context = NULL;
+  grpc_error *error = GRPC_ERROR_NONE;
+  *auth_context = NULL;
   if (peer.property_count != 1) {
-    gpr_log(GPR_ERROR, "Fake peers should only have 1 property.");
-    status = GRPC_SECURITY_ERROR;
+    error = GRPC_ERROR_CREATE("Fake peers should only have 1 property.");
     goto end;
   }
   prop_name = peer.properties[0].name;
   if (prop_name == NULL ||
       strcmp(prop_name, TSI_CERTIFICATE_TYPE_PEER_PROPERTY)) {
-    gpr_log(GPR_ERROR, "Unexpected property in fake peer: %s.",
-            prop_name == NULL ? "<EMPTY>" : prop_name);
-    status = GRPC_SECURITY_ERROR;
+    char *msg;
+    gpr_asprintf(&msg, "Unexpected property in fake peer: %s.",
+                 prop_name == NULL ? "<EMPTY>" : prop_name);
+    error = GRPC_ERROR_CREATE(msg);
+    gpr_free(msg);
     goto end;
   }
   if (strncmp(peer.properties[0].value.data, TSI_FAKE_CERTIFICATE_TYPE,
               peer.properties[0].value.length)) {
-    gpr_log(GPR_ERROR, "Invalid value for cert type property.");
-    status = GRPC_SECURITY_ERROR;
+    error = GRPC_ERROR_CREATE("Invalid value for cert type property.");
     goto end;
   }
-  auth_context = grpc_auth_context_create(NULL);
+  *auth_context = grpc_auth_context_create(NULL);
   grpc_auth_context_add_cstring_property(
-      auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
+      *auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
       GRPC_FAKE_TRANSPORT_SECURITY_TYPE);
 
 end:
-  cb(exec_ctx, user_data, status, auth_context);
-  grpc_auth_context_unref(auth_context);
+  grpc_exec_ctx_sched(exec_ctx, on_peer_checked, error, NULL);
   tsi_peer_destruct(&peer);
 }
 
@@ -313,26 +286,24 @@ static void fake_channel_check_call_host(grpc_exec_ctx *exec_ctx,
   cb(exec_ctx, user_data, GRPC_SECURITY_OK);
 }
 
-static void fake_channel_do_handshake(grpc_exec_ctx *exec_ctx,
-                                      grpc_channel_security_connector *sc,
-                                      grpc_endpoint *nonsecure_endpoint,
-                                      gpr_slice_buffer *read_buffer,
-                                      gpr_timespec deadline,
-                                      grpc_security_handshake_done_cb cb,
-                                      void *user_data) {
-  grpc_do_security_handshake(exec_ctx, tsi_create_fake_handshaker(1), &sc->base,
-                             true, nonsecure_endpoint, read_buffer, deadline,
-                             cb, user_data);
+static void fake_channel_add_handshakers(
+    grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
+    grpc_handshake_manager *handshake_mgr) {
+  grpc_handshake_manager_add(
+      handshake_mgr,
+      grpc_security_handshaker_create(
+          exec_ctx, tsi_create_fake_handshaker(true /* is_client */),
+          &sc->base));
 }
 
-static void fake_server_do_handshake(
-    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc,
-    grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint,
-    gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-    grpc_security_handshake_done_cb cb, void *user_data) {
-  grpc_do_security_handshake(exec_ctx, tsi_create_fake_handshaker(0), &sc->base,
-                             false, nonsecure_endpoint, read_buffer, deadline,
-                             cb, user_data);
+static void fake_server_add_handshakers(grpc_exec_ctx *exec_ctx,
+                                        grpc_server_security_connector *sc,
+                                        grpc_handshake_manager *handshake_mgr) {
+  grpc_handshake_manager_add(
+      handshake_mgr,
+      grpc_security_handshaker_create(
+          exec_ctx, tsi_create_fake_handshaker(false /* is_client */),
+          &sc->base));
 }
 
 static grpc_security_connector_vtable fake_channel_vtable = {
@@ -350,7 +321,7 @@ grpc_channel_security_connector *grpc_fake_channel_security_connector_create(
   c->base.vtable = &fake_channel_vtable;
   c->request_metadata_creds = grpc_call_credentials_ref(request_metadata_creds);
   c->check_call_host = fake_channel_check_call_host;
-  c->do_handshake = fake_channel_do_handshake;
+  c->add_handshakers = fake_channel_add_handshakers;
   return c;
 }
 
@@ -362,8 +333,7 @@ grpc_server_security_connector *grpc_fake_server_security_connector_create(
   gpr_ref_init(&c->base.refcount, 1);
   c->base.vtable = &fake_server_vtable;
   c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME;
-  c->do_handshake = fake_server_do_handshake;
-  gpr_mu_init(&c->mu);
+  c->add_handshakers = fake_server_add_handshakers;
   return c;
 }
 
@@ -396,11 +366,9 @@ static void ssl_channel_destroy(grpc_security_connector *sc) {
 static void ssl_server_destroy(grpc_security_connector *sc) {
   grpc_ssl_server_security_connector *c =
       (grpc_ssl_server_security_connector *)sc;
-
   if (c->handshaker_factory != NULL) {
     tsi_ssl_handshaker_factory_destroy(c->handshaker_factory);
   }
-  gpr_mu_destroy(&c->base.mu);
   gpr_free(sc);
 }
 
@@ -419,49 +387,35 @@ static grpc_security_status ssl_create_handshaker(
   return GRPC_SECURITY_OK;
 }
 
-static void ssl_channel_do_handshake(grpc_exec_ctx *exec_ctx,
-                                     grpc_channel_security_connector *sc,
-                                     grpc_endpoint *nonsecure_endpoint,
-                                     gpr_slice_buffer *read_buffer,
-                                     gpr_timespec deadline,
-                                     grpc_security_handshake_done_cb cb,
-                                     void *user_data) {
+static void ssl_channel_add_handshakers(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_security_connector *sc,
+                                        grpc_handshake_manager *handshake_mgr) {
   grpc_ssl_channel_security_connector *c =
       (grpc_ssl_channel_security_connector *)sc;
-  tsi_handshaker *handshaker;
-  grpc_security_status status = ssl_create_handshaker(
-      c->handshaker_factory, true,
-      c->overridden_target_name != NULL ? c->overridden_target_name
-                                        : c->target_name,
-      &handshaker);
-  if (status != GRPC_SECURITY_OK) {
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, status, NULL, NULL);
-  } else {
-    grpc_do_security_handshake(exec_ctx, handshaker, &sc->base, true,
-                               nonsecure_endpoint, read_buffer, deadline, cb,
-                               user_data);
-  }
-}
-
-static void ssl_server_do_handshake(
-    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc,
-    grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint,
-    gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-    grpc_security_handshake_done_cb cb, void *user_data) {
+  // Instantiate TSI handshaker.
+  tsi_handshaker *tsi_hs = NULL;
+  ssl_create_handshaker(c->handshaker_factory, true /* is_client */,
+                        c->overridden_target_name != NULL
+                            ? c->overridden_target_name
+                            : c->target_name,
+                        &tsi_hs);
+  // Create handshakers.
+  grpc_handshake_manager_add(handshake_mgr, grpc_security_handshaker_create(
+                                                exec_ctx, tsi_hs, &sc->base));
+}
+
+static void ssl_server_add_handshakers(grpc_exec_ctx *exec_ctx,
+                                       grpc_server_security_connector *sc,
+                                       grpc_handshake_manager *handshake_mgr) {
   grpc_ssl_server_security_connector *c =
       (grpc_ssl_server_security_connector *)sc;
-  tsi_handshaker *handshaker;
-  grpc_security_status status =
-      ssl_create_handshaker(c->handshaker_factory, false, NULL, &handshaker);
-  if (status != GRPC_SECURITY_OK) {
-    gpr_free(read_buffer);
-    cb(exec_ctx, user_data, status, NULL, NULL);
-  } else {
-    grpc_do_security_handshake(exec_ctx, handshaker, &sc->base, false,
-                               nonsecure_endpoint, read_buffer, deadline, cb,
-                               user_data);
-  }
+  // Instantiate TSI handshaker.
+  tsi_handshaker *tsi_hs = NULL;
+  ssl_create_handshaker(c->handshaker_factory, false /* is_client */,
+                        NULL /* peer_name */, &tsi_hs);
+  // Create handshakers.
+  grpc_handshake_manager_add(handshake_mgr, grpc_security_handshaker_create(
+                                                exec_ctx, tsi_hs, &sc->base));
 }
 
 static int ssl_host_matches_name(const tsi_peer *peer, const char *peer_name) {
@@ -518,57 +472,53 @@ grpc_auth_context *tsi_ssl_peer_to_auth_context(const tsi_peer *peer) {
   return ctx;
 }
 
-static grpc_security_status ssl_check_peer(grpc_security_connector *sc,
-                                           const char *peer_name,
-                                           const tsi_peer *peer,
-                                           grpc_auth_context **auth_context) {
+static grpc_error *ssl_check_peer(grpc_security_connector *sc,
+                                  const char *peer_name, const tsi_peer *peer,
+                                  grpc_auth_context **auth_context) {
   /* Check the ALPN. */
   const tsi_peer_property *p =
       tsi_peer_get_property_by_name(peer, TSI_SSL_ALPN_SELECTED_PROTOCOL);
   if (p == NULL) {
-    gpr_log(GPR_ERROR, "Missing selected ALPN property.");
-    return GRPC_SECURITY_ERROR;
+    return GRPC_ERROR_CREATE(
+        "Cannot check peer: missing selected ALPN property.");
   }
   if (!grpc_chttp2_is_alpn_version_supported(p->value.data, p->value.length)) {
-    gpr_log(GPR_ERROR, "Invalid ALPN value.");
-    return GRPC_SECURITY_ERROR;
+    return GRPC_ERROR_CREATE("Cannot check peer: invalid ALPN value.");
   }
 
   /* Check the peer name if specified. */
   if (peer_name != NULL && !ssl_host_matches_name(peer, peer_name)) {
-    gpr_log(GPR_ERROR, "Peer name %s is not in peer certificate", peer_name);
-    return GRPC_SECURITY_ERROR;
+    char *msg;
+    gpr_asprintf(&msg, "Peer name %s is not in peer certificate", peer_name);
+    grpc_error *error = GRPC_ERROR_CREATE(msg);
+    gpr_free(msg);
+    return error;
   }
   *auth_context = tsi_ssl_peer_to_auth_context(peer);
-  return GRPC_SECURITY_OK;
+  return GRPC_ERROR_NONE;
 }
 
 static void ssl_channel_check_peer(grpc_exec_ctx *exec_ctx,
                                    grpc_security_connector *sc, tsi_peer peer,
-                                   grpc_security_peer_check_cb cb,
-                                   void *user_data) {
+                                   grpc_auth_context **auth_context,
+                                   grpc_closure *on_peer_checked) {
   grpc_ssl_channel_security_connector *c =
       (grpc_ssl_channel_security_connector *)sc;
-  grpc_security_status status;
-  grpc_auth_context *auth_context = NULL;
-  status = ssl_check_peer(sc, c->overridden_target_name != NULL
-                                  ? c->overridden_target_name
-                                  : c->target_name,
-                          &peer, &auth_context);
-  cb(exec_ctx, user_data, status, auth_context);
-  grpc_auth_context_unref(auth_context);
+  grpc_error *error = ssl_check_peer(sc, c->overridden_target_name != NULL
+                                             ? c->overridden_target_name
+                                             : c->target_name,
+                                     &peer, auth_context);
+  grpc_exec_ctx_sched(exec_ctx, on_peer_checked, error, NULL);
   tsi_peer_destruct(&peer);
 }
 
 static void ssl_server_check_peer(grpc_exec_ctx *exec_ctx,
                                   grpc_security_connector *sc, tsi_peer peer,
-                                  grpc_security_peer_check_cb cb,
-                                  void *user_data) {
-  grpc_auth_context *auth_context = NULL;
-  grpc_security_status status = ssl_check_peer(sc, NULL, &peer, &auth_context);
+                                  grpc_auth_context **auth_context,
+                                  grpc_closure *on_peer_checked) {
+  grpc_error *error = ssl_check_peer(sc, NULL, &peer, auth_context);
   tsi_peer_destruct(&peer);
-  cb(exec_ctx, user_data, status, auth_context);
-  grpc_auth_context_unref(auth_context);
+  grpc_exec_ctx_sched(exec_ctx, on_peer_checked, error, NULL);
 }
 
 static void add_shallow_auth_property_to_peer(tsi_peer *peer,
@@ -642,8 +592,8 @@ static grpc_security_connector_vtable ssl_channel_vtable = {
 static grpc_security_connector_vtable ssl_server_vtable = {
     ssl_server_destroy, ssl_server_check_peer};
 
-static gpr_slice compute_default_pem_root_certs_once(void) {
-  gpr_slice result = gpr_empty_slice();
+static grpc_slice compute_default_pem_root_certs_once(void) {
+  grpc_slice result = gpr_empty_slice();
 
   /* First try to load the roots from the environment. */
   char *default_root_certs_path =
@@ -656,17 +606,17 @@ static gpr_slice compute_default_pem_root_certs_once(void) {
 
   /* Try overridden roots if needed. */
   grpc_ssl_roots_override_result ovrd_res = GRPC_SSL_ROOTS_OVERRIDE_FAIL;
-  if (GPR_SLICE_IS_EMPTY(result) && ssl_roots_override_cb != NULL) {
+  if (GRPC_SLICE_IS_EMPTY(result) && ssl_roots_override_cb != NULL) {
     char *pem_root_certs = NULL;
     ovrd_res = ssl_roots_override_cb(&pem_root_certs);
     if (ovrd_res == GRPC_SSL_ROOTS_OVERRIDE_OK) {
       GPR_ASSERT(pem_root_certs != NULL);
-      result = gpr_slice_new(pem_root_certs, strlen(pem_root_certs), gpr_free);
+      result = grpc_slice_new(pem_root_certs, strlen(pem_root_certs), gpr_free);
     }
   }
 
   /* Fall back to installed certs if needed. */
-  if (GPR_SLICE_IS_EMPTY(result) &&
+  if (GRPC_SLICE_IS_EMPTY(result) &&
       ovrd_res != GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY) {
     GRPC_LOG_IF_ERROR("load_file",
                       grpc_load_file(installed_roots_path, 0, &result));
@@ -674,13 +624,13 @@ static gpr_slice compute_default_pem_root_certs_once(void) {
   return result;
 }
 
-static gpr_slice default_pem_root_certs;
+static grpc_slice default_pem_root_certs;
 
 static void init_default_pem_root_certs(void) {
   default_pem_root_certs = compute_default_pem_root_certs_once();
 }
 
-gpr_slice grpc_get_default_ssl_roots_for_testing(void) {
+grpc_slice grpc_get_default_ssl_roots_for_testing(void) {
   return compute_default_pem_root_certs_once();
 }
 
@@ -714,8 +664,8 @@ size_t grpc_get_default_ssl_roots(const unsigned char **pem_root_certs) {
      loading all the roots once for the lifetime of the process. */
   static gpr_once once = GPR_ONCE_INIT;
   gpr_once_init(&once, init_default_pem_root_certs);
-  *pem_root_certs = GPR_SLICE_START_PTR(default_pem_root_certs);
-  return GPR_SLICE_LENGTH(default_pem_root_certs);
+  *pem_root_certs = GRPC_SLICE_START_PTR(default_pem_root_certs);
+  return GRPC_SLICE_LENGTH(default_pem_root_certs);
 }
 
 grpc_security_status grpc_ssl_channel_security_connector_create(
@@ -765,7 +715,7 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
   c->base.request_metadata_creds =
       grpc_call_credentials_ref(request_metadata_creds);
   c->base.check_call_host = ssl_channel_check_call_host;
-  c->base.do_handshake = ssl_channel_do_handshake;
+  c->base.add_handshakers = ssl_channel_add_handshakers;
   gpr_split_host_port(target_name, &c->target_name, &port);
   gpr_free(port);
   if (overridden_target_name != NULL) {
@@ -840,8 +790,7 @@ grpc_security_status grpc_ssl_server_security_connector_create(
     *sc = NULL;
     goto error;
   }
-  gpr_mu_init(&c->base.mu);
-  c->base.do_handshake = ssl_server_do_handshake;
+  c->base.add_handshakers = ssl_server_add_handshakers;
   *sc = &c->base;
   gpr_free((void *)alpn_protocol_strings);
   gpr_free(alpn_protocol_string_lengths);
diff --git a/src/core/lib/security/transport/security_connector.h b/src/core/lib/security/transport/security_connector.h
index 0b5b44bf1a..a84b359051 100644
--- a/src/core/lib/security/transport/security_connector.h
+++ b/src/core/lib/security/transport/security_connector.h
@@ -35,6 +35,8 @@
 #define GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURITY_CONNECTOR_H
 
 #include <grpc/grpc_security.h>
+
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/tcp_server.h"
 #include "src/core/lib/tsi/transport_security_interface.h"
@@ -57,21 +59,11 @@ typedef struct grpc_security_connector grpc_security_connector;
 
 #define GRPC_SECURITY_CONNECTOR_ARG "grpc.security_connector"
 
-typedef void (*grpc_security_peer_check_cb)(grpc_exec_ctx *exec_ctx,
-                                            void *user_data,
-                                            grpc_security_status status,
-                                            grpc_auth_context *auth_context);
-
-/* Ownership of the secure_endpoint is transfered. */
-typedef void (*grpc_security_handshake_done_cb)(
-    grpc_exec_ctx *exec_ctx, void *user_data, grpc_security_status status,
-    grpc_endpoint *secure_endpoint, grpc_auth_context *auth_context);
-
 typedef struct {
   void (*destroy)(grpc_security_connector *sc);
   void (*check_peer)(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc,
-                     tsi_peer peer, grpc_security_peer_check_cb cb,
-                     void *user_data);
+                     tsi_peer peer, grpc_auth_context **auth_context,
+                     grpc_closure *on_peer_checked);
 } grpc_security_connector_vtable;
 
 typedef struct grpc_security_connector_handshake_list {
@@ -106,12 +98,12 @@ void grpc_security_connector_unref(grpc_security_connector *policy);
 #endif
 
 /* Check the peer. Callee takes ownership of the peer object.
-   The callback will include the resulting auth_context. */
+   When done, sets *auth_context and invokes on_peer_checked. */
 void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx,
                                         grpc_security_connector *sc,
                                         tsi_peer peer,
-                                        grpc_security_peer_check_cb cb,
-                                        void *user_data);
+                                        grpc_auth_context **auth_context,
+                                        grpc_closure *on_peer_checked);
 
 /* Util to encapsulate the connector in a channel arg. */
 grpc_arg grpc_security_connector_to_arg(grpc_security_connector *sc);
@@ -141,11 +133,9 @@ struct grpc_channel_security_connector {
                           grpc_channel_security_connector *sc, const char *host,
                           grpc_auth_context *auth_context,
                           grpc_security_call_host_check_cb cb, void *user_data);
-  void (*do_handshake)(grpc_exec_ctx *exec_ctx,
-                       grpc_channel_security_connector *sc,
-                       grpc_endpoint *nonsecure_endpoint,
-                       gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-                       grpc_security_handshake_done_cb cb, void *user_data);
+  void (*add_handshakers)(grpc_exec_ctx *exec_ctx,
+                          grpc_channel_security_connector *sc,
+                          grpc_handshake_manager *handshake_mgr);
 };
 
 /* Checks that the host that will be set for a call is acceptable. */
@@ -154,11 +144,10 @@ void grpc_channel_security_connector_check_call_host(
     const char *host, grpc_auth_context *auth_context,
     grpc_security_call_host_check_cb cb, void *user_data);
 
-/* Handshake. */
-void grpc_channel_security_connector_do_handshake(
+/* Registers handshakers with \a handshake_mgr. */
+void grpc_channel_security_connector_add_handshakers(
     grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *connector,
-    grpc_endpoint *nonsecure_endpoint, gpr_slice_buffer *read_buffer,
-    gpr_timespec deadline, grpc_security_handshake_done_cb cb, void *user_data);
+    grpc_handshake_manager *handshake_mgr);
 
 /* --- server_security_connector object. ---
 
@@ -169,25 +158,14 @@ typedef struct grpc_server_security_connector grpc_server_security_connector;
 
 struct grpc_server_security_connector {
   grpc_security_connector base;
-  gpr_mu mu;
-  grpc_security_connector_handshake_list *handshaking_handshakes;
-  const grpc_channel_args *channel_args;
-  void (*do_handshake)(grpc_exec_ctx *exec_ctx,
-                       grpc_server_security_connector *sc,
-                       grpc_tcp_server_acceptor *acceptor,
-                       grpc_endpoint *nonsecure_endpoint,
-                       gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-                       grpc_security_handshake_done_cb cb, void *user_data);
+  void (*add_handshakers)(grpc_exec_ctx *exec_ctx,
+                          grpc_server_security_connector *sc,
+                          grpc_handshake_manager *handshake_mgr);
 };
 
-void grpc_server_security_connector_do_handshake(
+void grpc_server_security_connector_add_handshakers(
     grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc,
-    grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint,
-    gpr_slice_buffer *read_buffer, gpr_timespec deadline,
-    grpc_security_handshake_done_cb cb, void *user_data);
-
-void grpc_server_security_connector_shutdown(
-    grpc_exec_ctx *exec_ctx, grpc_server_security_connector *connector);
+    grpc_handshake_manager *handshake_mgr);
 
 /* --- Creation security connectors. --- */
 
@@ -233,7 +211,7 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
 size_t grpc_get_default_ssl_roots(const unsigned char **pem_root_certs);
 
 /* Exposed for TESTING ONLY!. */
-gpr_slice grpc_get_default_ssl_roots_for_testing(void);
+grpc_slice grpc_get_default_ssl_roots_for_testing(void);
 
 /* Config for ssl servers. */
 typedef struct {
diff --git a/src/core/lib/security/transport/security_handshaker.c b/src/core/lib/security/transport/security_handshaker.c
new file mode 100644
index 0000000000..41a775db85
--- /dev/null
+++ b/src/core/lib/security/transport/security_handshaker.c
@@ -0,0 +1,450 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/security/transport/security_handshaker.h"
+
+#include <stdbool.h>
+#include <string.h>
+
+#include <grpc/slice_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/security/context/security_context.h"
+#include "src/core/lib/security/transport/secure_endpoint.h"
+#include "src/core/lib/security/transport/tsi_error.h"
+
+#define GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE 256
+
+typedef struct {
+  grpc_handshaker base;
+
+  // State set at creation time.
+  tsi_handshaker *handshaker;
+  grpc_security_connector *connector;
+
+  gpr_mu mu;
+  gpr_refcount refs;
+
+  bool shutdown;
+  // Endpoint and read buffer to destroy after a shutdown.
+  grpc_endpoint *endpoint_to_destroy;
+  grpc_slice_buffer *read_buffer_to_destroy;
+
+  // State saved while performing the handshake.
+  grpc_handshaker_args *args;
+  grpc_closure *on_handshake_done;
+
+  unsigned char *handshake_buffer;
+  size_t handshake_buffer_size;
+  grpc_slice_buffer left_overs;
+  grpc_slice_buffer outgoing;
+  grpc_closure on_handshake_data_sent_to_peer;
+  grpc_closure on_handshake_data_received_from_peer;
+  grpc_closure on_peer_checked;
+  grpc_auth_context *auth_context;
+} security_handshaker;
+
+static void security_handshaker_unref(grpc_exec_ctx *exec_ctx,
+                                      security_handshaker *h) {
+  if (gpr_unref(&h->refs)) {
+    gpr_mu_destroy(&h->mu);
+    tsi_handshaker_destroy(h->handshaker);
+    if (h->endpoint_to_destroy != NULL) {
+      grpc_endpoint_destroy(exec_ctx, h->endpoint_to_destroy);
+    }
+    if (h->read_buffer_to_destroy != NULL) {
+      grpc_slice_buffer_destroy(h->read_buffer_to_destroy);
+      gpr_free(h->read_buffer_to_destroy);
+    }
+    gpr_free(h->handshake_buffer);
+    grpc_slice_buffer_destroy(&h->left_overs);
+    grpc_slice_buffer_destroy(&h->outgoing);
+    GRPC_AUTH_CONTEXT_UNREF(h->auth_context, "handshake");
+    GRPC_SECURITY_CONNECTOR_UNREF(h->connector, "handshake");
+    gpr_free(h);
+  }
+}
+
+// Set args fields to NULL, saving the endpoint and read buffer for
+// later destruction.
+static void cleanup_args_for_failure_locked(security_handshaker *h) {
+  h->endpoint_to_destroy = h->args->endpoint;
+  h->args->endpoint = NULL;
+  h->read_buffer_to_destroy = h->args->read_buffer;
+  h->args->read_buffer = NULL;
+  grpc_channel_args_destroy(h->args->args);
+  h->args->args = NULL;
+}
+
+// If the handshake failed or we're shutting down, clean up and invoke the
+// callback with the error.
+static void security_handshake_failed_locked(grpc_exec_ctx *exec_ctx,
+                                             security_handshaker *h,
+                                             grpc_error *error) {
+  if (error == GRPC_ERROR_NONE) {
+    // If we were shut down after the handshake succeeded but before an
+    // endpoint callback was invoked, we need to generate our own error.
+    error = GRPC_ERROR_CREATE("Handshaker shutdown");
+  }
+  const char *msg = grpc_error_string(error);
+  gpr_log(GPR_DEBUG, "Security handshake failed: %s", msg);
+  grpc_error_free_string(msg);
+  if (!h->shutdown) {
+    // TODO(ctiller): It is currently necessary to shutdown endpoints
+    // before destroying them, even if we know that there are no
+    // pending read/write callbacks.  This should be fixed, at which
+    // point this can be removed.
+    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint);
+    // Not shutting down, so the write failed.  Clean up before
+    // invoking the callback.
+    cleanup_args_for_failure_locked(h);
+    // Set shutdown to true so that subsequent calls to
+    // security_handshaker_shutdown() do nothing.
+    h->shutdown = true;
+  }
+  // Invoke callback.
+  grpc_exec_ctx_sched(exec_ctx, h->on_handshake_done, error, NULL);
+}
+
+static void on_peer_checked(grpc_exec_ctx *exec_ctx, void *arg,
+                            grpc_error *error) {
+  security_handshaker *h = arg;
+  gpr_mu_lock(&h->mu);
+  if (error != GRPC_ERROR_NONE || h->shutdown) {
+    security_handshake_failed_locked(exec_ctx, h, GRPC_ERROR_REF(error));
+    goto done;
+  }
+  // Get frame protector.
+  tsi_frame_protector *protector;
+  tsi_result result =
+      tsi_handshaker_create_frame_protector(h->handshaker, NULL, &protector);
+  if (result != TSI_OK) {
+    error = grpc_set_tsi_error_result(
+        GRPC_ERROR_CREATE("Frame protector creation failed"), result);
+    security_handshake_failed_locked(exec_ctx, h, error);
+    goto done;
+  }
+  // Success.
+  // Create secure endpoint.
+  h->args->endpoint = grpc_secure_endpoint_create(
+      protector, h->args->endpoint, h->left_overs.slices, h->left_overs.count);
+  h->left_overs.count = 0;
+  h->left_overs.length = 0;
+  // Clear out the read buffer before it gets passed to the transport,
+  // since any excess bytes were already copied to h->left_overs.
+  grpc_slice_buffer_reset_and_unref(h->args->read_buffer);
+  // Add auth context to channel args.
+  grpc_arg auth_context_arg = grpc_auth_context_to_arg(h->auth_context);
+  grpc_channel_args *tmp_args = h->args->args;
+  h->args->args =
+      grpc_channel_args_copy_and_add(tmp_args, &auth_context_arg, 1);
+  grpc_channel_args_destroy(tmp_args);
+  // Invoke callback.
+  grpc_exec_ctx_sched(exec_ctx, h->on_handshake_done, GRPC_ERROR_NONE, NULL);
+  // Set shutdown to true so that subsequent calls to
+  // security_handshaker_shutdown() do nothing.
+  h->shutdown = true;
+done:
+  gpr_mu_unlock(&h->mu);
+  security_handshaker_unref(exec_ctx, h);
+}
+
+static grpc_error *check_peer_locked(grpc_exec_ctx *exec_ctx,
+                                     security_handshaker *h) {
+  tsi_peer peer;
+  tsi_result result = tsi_handshaker_extract_peer(h->handshaker, &peer);
+  if (result != TSI_OK) {
+    return grpc_set_tsi_error_result(
+        GRPC_ERROR_CREATE("Peer extraction failed"), result);
+  }
+  grpc_security_connector_check_peer(exec_ctx, h->connector, peer,
+                                     &h->auth_context, &h->on_peer_checked);
+  return GRPC_ERROR_NONE;
+}
+
+static grpc_error *send_handshake_bytes_to_peer_locked(grpc_exec_ctx *exec_ctx,
+                                                       security_handshaker *h) {
+  // Get data to send.
+  tsi_result result = TSI_OK;
+  size_t offset = 0;
+  do {
+    size_t to_send_size = h->handshake_buffer_size - offset;
+    result = tsi_handshaker_get_bytes_to_send_to_peer(
+        h->handshaker, h->handshake_buffer + offset, &to_send_size);
+    offset += to_send_size;
+    if (result == TSI_INCOMPLETE_DATA) {
+      h->handshake_buffer_size *= 2;
+      h->handshake_buffer =
+          gpr_realloc(h->handshake_buffer, h->handshake_buffer_size);
+    }
+  } while (result == TSI_INCOMPLETE_DATA);
+  if (result != TSI_OK) {
+    return grpc_set_tsi_error_result(GRPC_ERROR_CREATE("Handshake failed"),
+                                     result);
+  }
+  // Send data.
+  grpc_slice to_send =
+      grpc_slice_from_copied_buffer((const char *)h->handshake_buffer, offset);
+  grpc_slice_buffer_reset_and_unref(&h->outgoing);
+  grpc_slice_buffer_add(&h->outgoing, to_send);
+  grpc_endpoint_write(exec_ctx, h->args->endpoint, &h->outgoing,
+                      &h->on_handshake_data_sent_to_peer);
+  return GRPC_ERROR_NONE;
+}
+
+static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
+                                                 void *arg, grpc_error *error) {
+  security_handshaker *h = arg;
+  gpr_mu_lock(&h->mu);
+  if (error != GRPC_ERROR_NONE || h->shutdown) {
+    security_handshake_failed_locked(
+        exec_ctx, h,
+        GRPC_ERROR_CREATE_REFERENCING("Handshake read failed", &error, 1));
+    gpr_mu_unlock(&h->mu);
+    security_handshaker_unref(exec_ctx, h);
+    return;
+  }
+  // Process received data.
+  tsi_result result = TSI_OK;
+  size_t consumed_slice_size = 0;
+  size_t i;
+  for (i = 0; i < h->args->read_buffer->count; i++) {
+    consumed_slice_size = GRPC_SLICE_LENGTH(h->args->read_buffer->slices[i]);
+    result = tsi_handshaker_process_bytes_from_peer(
+        h->handshaker, GRPC_SLICE_START_PTR(h->args->read_buffer->slices[i]),
+        &consumed_slice_size);
+    if (!tsi_handshaker_is_in_progress(h->handshaker)) break;
+  }
+  if (tsi_handshaker_is_in_progress(h->handshaker)) {
+    /* We may need more data. */
+    if (result == TSI_INCOMPLETE_DATA) {
+      grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+                         &h->on_handshake_data_received_from_peer);
+      goto done;
+    } else {
+      error = send_handshake_bytes_to_peer_locked(exec_ctx, h);
+      if (error != GRPC_ERROR_NONE) {
+        security_handshake_failed_locked(exec_ctx, h, error);
+        gpr_mu_unlock(&h->mu);
+        security_handshaker_unref(exec_ctx, h);
+        return;
+      }
+      goto done;
+    }
+  }
+  if (result != TSI_OK) {
+    security_handshake_failed_locked(
+        exec_ctx, h, grpc_set_tsi_error_result(
+                         GRPC_ERROR_CREATE("Handshake failed"), result));
+    gpr_mu_unlock(&h->mu);
+    security_handshaker_unref(exec_ctx, h);
+    return;
+  }
+  /* Handshake is done and successful this point. */
+  bool has_left_overs_in_current_slice =
+      (consumed_slice_size <
+       GRPC_SLICE_LENGTH(h->args->read_buffer->slices[i]));
+  size_t num_left_overs = (has_left_overs_in_current_slice ? 1 : 0) +
+                          h->args->read_buffer->count - i - 1;
+  if (num_left_overs > 0) {
+    /* Put the leftovers in our buffer (ownership transfered). */
+    if (has_left_overs_in_current_slice) {
+      grpc_slice_buffer_add(
+          &h->left_overs,
+          grpc_slice_split_tail(&h->args->read_buffer->slices[i],
+                                consumed_slice_size));
+      /* split_tail above increments refcount. */
+      grpc_slice_unref(h->args->read_buffer->slices[i]);
+    }
+    grpc_slice_buffer_addn(
+        &h->left_overs, &h->args->read_buffer->slices[i + 1],
+        num_left_overs - (size_t)has_left_overs_in_current_slice);
+  }
+  // Check peer.
+  error = check_peer_locked(exec_ctx, h);
+  if (error != GRPC_ERROR_NONE) {
+    security_handshake_failed_locked(exec_ctx, h, error);
+    gpr_mu_unlock(&h->mu);
+    security_handshaker_unref(exec_ctx, h);
+    return;
+  }
+done:
+  gpr_mu_unlock(&h->mu);
+}
+
+static void on_handshake_data_sent_to_peer(grpc_exec_ctx *exec_ctx, void *arg,
+                                           grpc_error *error) {
+  security_handshaker *h = arg;
+  gpr_mu_lock(&h->mu);
+  if (error != GRPC_ERROR_NONE || h->shutdown) {
+    security_handshake_failed_locked(
+        exec_ctx, h,
+        GRPC_ERROR_CREATE_REFERENCING("Handshake write failed", &error, 1));
+    gpr_mu_unlock(&h->mu);
+    security_handshaker_unref(exec_ctx, h);
+    return;
+  }
+  /* We may be done. */
+  if (tsi_handshaker_is_in_progress(h->handshaker)) {
+    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+                       &h->on_handshake_data_received_from_peer);
+  } else {
+    error = check_peer_locked(exec_ctx, h);
+    if (error != GRPC_ERROR_NONE) {
+      security_handshake_failed_locked(exec_ctx, h, error);
+      gpr_mu_unlock(&h->mu);
+      security_handshaker_unref(exec_ctx, h);
+      return;
+    }
+  }
+  gpr_mu_unlock(&h->mu);
+}
+
+//
+// public handshaker API
+//
+
+static void security_handshaker_destroy(grpc_exec_ctx *exec_ctx,
+                                        grpc_handshaker *handshaker) {
+  security_handshaker *h = (security_handshaker *)handshaker;
+  security_handshaker_unref(exec_ctx, h);
+}
+
+static void security_handshaker_shutdown(grpc_exec_ctx *exec_ctx,
+                                         grpc_handshaker *handshaker) {
+  security_handshaker *h = (security_handshaker *)handshaker;
+  gpr_mu_lock(&h->mu);
+  if (!h->shutdown) {
+    h->shutdown = true;
+    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint);
+    cleanup_args_for_failure_locked(h);
+  }
+  gpr_mu_unlock(&h->mu);
+}
+
+static void security_handshaker_do_handshake(grpc_exec_ctx *exec_ctx,
+                                             grpc_handshaker *handshaker,
+                                             grpc_tcp_server_acceptor *acceptor,
+                                             grpc_closure *on_handshake_done,
+                                             grpc_handshaker_args *args) {
+  security_handshaker *h = (security_handshaker *)handshaker;
+  gpr_mu_lock(&h->mu);
+  h->args = args;
+  h->on_handshake_done = on_handshake_done;
+  gpr_ref(&h->refs);
+  grpc_error *error = send_handshake_bytes_to_peer_locked(exec_ctx, h);
+  if (error != GRPC_ERROR_NONE) {
+    security_handshake_failed_locked(exec_ctx, h, error);
+    gpr_mu_unlock(&h->mu);
+    security_handshaker_unref(exec_ctx, h);
+    return;
+  }
+  gpr_mu_unlock(&h->mu);
+}
+
+static const grpc_handshaker_vtable security_handshaker_vtable = {
+    security_handshaker_destroy, security_handshaker_shutdown,
+    security_handshaker_do_handshake};
+
+static grpc_handshaker *security_handshaker_create(
+    grpc_exec_ctx *exec_ctx, tsi_handshaker *handshaker,
+    grpc_security_connector *connector) {
+  security_handshaker *h = gpr_malloc(sizeof(security_handshaker));
+  memset(h, 0, sizeof(security_handshaker));
+  grpc_handshaker_init(&security_handshaker_vtable, &h->base);
+  h->handshaker = handshaker;
+  h->connector = GRPC_SECURITY_CONNECTOR_REF(connector, "handshake");
+  gpr_mu_init(&h->mu);
+  gpr_ref_init(&h->refs, 1);
+  h->handshake_buffer_size = GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE;
+  h->handshake_buffer = gpr_malloc(h->handshake_buffer_size);
+  grpc_closure_init(&h->on_handshake_data_sent_to_peer,
+                    on_handshake_data_sent_to_peer, h);
+  grpc_closure_init(&h->on_handshake_data_received_from_peer,
+                    on_handshake_data_received_from_peer, h);
+  grpc_closure_init(&h->on_peer_checked, on_peer_checked, h);
+  grpc_slice_buffer_init(&h->left_overs);
+  grpc_slice_buffer_init(&h->outgoing);
+  return &h->base;
+}
+
+//
+// fail_handshaker
+//
+
+static void fail_handshaker_destroy(grpc_exec_ctx *exec_ctx,
+                                    grpc_handshaker *handshaker) {
+  gpr_free(handshaker);
+}
+
+static void fail_handshaker_shutdown(grpc_exec_ctx *exec_ctx,
+                                     grpc_handshaker *handshaker) {}
+
+static void fail_handshaker_do_handshake(grpc_exec_ctx *exec_ctx,
+                                         grpc_handshaker *handshaker,
+                                         grpc_tcp_server_acceptor *acceptor,
+                                         grpc_closure *on_handshake_done,
+                                         grpc_handshaker_args *args) {
+  grpc_exec_ctx_sched(exec_ctx, on_handshake_done,
+                      GRPC_ERROR_CREATE("Failed to create security handshaker"),
+                      NULL);
+}
+
+static const grpc_handshaker_vtable fail_handshaker_vtable = {
+    fail_handshaker_destroy, fail_handshaker_shutdown,
+    fail_handshaker_do_handshake};
+
+static grpc_handshaker *fail_handshaker_create() {
+  grpc_handshaker *h = gpr_malloc(sizeof(*h));
+  grpc_handshaker_init(&fail_handshaker_vtable, h);
+  return h;
+}
+
+//
+// exported functions
+//
+
+grpc_handshaker *grpc_security_handshaker_create(
+    grpc_exec_ctx *exec_ctx, tsi_handshaker *handshaker,
+    grpc_security_connector *connector) {
+  // If no TSI handshaker was created, return a handshaker that always fails.
+  // Otherwise, return a real security handshaker.
+  if (handshaker == NULL) {
+    return fail_handshaker_create();
+  } else {
+    return security_handshaker_create(exec_ctx, handshaker, connector);
+  }
+}
diff --git a/src/core/lib/security/transport/handshake.h b/src/core/lib/security/transport/security_handshaker.h
index 53092f5421..5ddbf4b451 100644
--- a/src/core/lib/security/transport/handshake.h
+++ b/src/core/lib/security/transport/security_handshaker.h
@@ -31,20 +31,16 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_SECURITY_TRANSPORT_HANDSHAKE_H
-#define GRPC_CORE_LIB_SECURITY_TRANSPORT_HANDSHAKE_H
+#ifndef GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURITY_HANDSHAKER_H
+#define GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURITY_HANDSHAKER_H
 
-#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/security/transport/security_connector.h"
 
-/* Calls the callback upon completion. Takes owership of handshaker and
- * read_buffer. */
-void grpc_do_security_handshake(
+/// Creates a security handshaker using \a handshaker.
+grpc_handshaker *grpc_security_handshaker_create(
     grpc_exec_ctx *exec_ctx, tsi_handshaker *handshaker,
-    grpc_security_connector *connector, bool is_client_side,
-    grpc_endpoint *nonsecure_endpoint, gpr_slice_buffer *read_buffer,
-    gpr_timespec deadline, grpc_security_handshake_done_cb cb, void *user_data);
+    grpc_security_connector *connector);
 
-void grpc_security_handshake_shutdown(grpc_exec_ctx *exec_ctx, void *handshake);
-
-#endif /* GRPC_CORE_LIB_SECURITY_TRANSPORT_HANDSHAKE_H */
+#endif /* GRPC_CORE_LIB_SECURITY_TRANSPORT_SECURITY_HANDSHAKER_H */
diff --git a/src/core/lib/security/transport/server_auth_filter.c b/src/core/lib/security/transport/server_auth_filter.c
index b2c6815af8..e6a242e68f 100644
--- a/src/core/lib/security/transport/server_auth_filter.c
+++ b/src/core/lib/security/transport/server_auth_filter.c
@@ -78,7 +78,7 @@ static grpc_metadata_array metadata_batch_to_md_array(
     usr_md = &result.metadata[result.count++];
     usr_md->key = grpc_mdstr_as_c_string(key);
     usr_md->value = grpc_mdstr_as_c_string(value);
-    usr_md->value_length = GPR_SLICE_LENGTH(value->slice);
+    usr_md->value_length = GRPC_SLICE_LENGTH(value->slice);
   }
   return result;
 }
@@ -92,14 +92,14 @@ static grpc_mdelem *remove_consumed_md(void *user_data, grpc_mdelem *md) {
     /* Maybe we could do a pointer comparison but we do not have any guarantee
        that the metadata processor used the same pointers for consumed_md in the
        callback. */
-    if (GPR_SLICE_LENGTH(md->key->slice) != strlen(consumed_md->key) ||
-        GPR_SLICE_LENGTH(md->value->slice) != consumed_md->value_length) {
+    if (GRPC_SLICE_LENGTH(md->key->slice) != strlen(consumed_md->key) ||
+        GRPC_SLICE_LENGTH(md->value->slice) != consumed_md->value_length) {
       continue;
     }
-    if (memcmp(GPR_SLICE_START_PTR(md->key->slice), consumed_md->key,
-               GPR_SLICE_LENGTH(md->key->slice)) == 0 &&
-        memcmp(GPR_SLICE_START_PTR(md->value->slice), consumed_md->value,
-               GPR_SLICE_LENGTH(md->value->slice)) == 0) {
+    if (memcmp(GRPC_SLICE_START_PTR(md->key->slice), consumed_md->key,
+               GRPC_SLICE_LENGTH(md->key->slice)) == 0 &&
+        memcmp(GRPC_SLICE_START_PTR(md->value->slice), consumed_md->value,
+               GRPC_SLICE_LENGTH(md->value->slice)) == 0) {
       return NULL; /* Delete. */
     }
   }
@@ -134,14 +134,14 @@ static void on_md_processing_done(
     grpc_metadata_array_destroy(&calld->md);
     grpc_exec_ctx_sched(&exec_ctx, calld->on_done_recv, GRPC_ERROR_NONE, NULL);
   } else {
-    gpr_slice message;
+    grpc_slice message;
     grpc_transport_stream_op *close_op = gpr_malloc(sizeof(*close_op));
     memset(close_op, 0, sizeof(*close_op));
     grpc_metadata_array_destroy(&calld->md);
     error_details = error_details != NULL
                         ? error_details
                         : "Authentication metadata processing failed.";
-    message = gpr_slice_from_copied_string(error_details);
+    message = grpc_slice_from_copied_string(error_details);
     calld->transport_op->send_initial_metadata = NULL;
     if (calld->transport_op->send_message != NULL) {
       grpc_byte_stream_destroy(&exec_ctx, calld->transport_op->send_message);
@@ -238,9 +238,9 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                               void *ignored) {}
 
 /* Constructor for channel_data */
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   grpc_auth_context *auth_context =
       grpc_find_auth_context_in_args(args->channel_args);
   grpc_server_credentials *creds =
@@ -256,6 +256,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
   chand->auth_context =
       GRPC_AUTH_CONTEXT_REF(auth_context, "server_auth_filter");
   chand->creds = grpc_server_credentials_ref(creds);
+  return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
@@ -278,4 +279,5 @@ const grpc_channel_filter grpc_server_auth_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "server-auth"};
diff --git a/src/core/lib/security/util/b64.c b/src/core/lib/security/util/b64.c
index 9da42e4e73..4892e8e621 100644
--- a/src/core/lib/security/util/b64.c
+++ b/src/core/lib/security/util/b64.c
@@ -120,7 +120,7 @@ char *grpc_base64_encode(const void *vdata, size_t data_size, int url_safe,
   return result;
 }
 
-gpr_slice grpc_base64_decode(const char *b64, int url_safe) {
+grpc_slice grpc_base64_decode(const char *b64, int url_safe) {
   return grpc_base64_decode_with_len(b64, strlen(b64), url_safe);
 }
 
@@ -182,10 +182,10 @@ static int decode_group(const unsigned char *codes, size_t num_codes,
   return 1;
 }
 
-gpr_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
-                                      int url_safe) {
-  gpr_slice result = gpr_slice_malloc(b64_len);
-  unsigned char *current = GPR_SLICE_START_PTR(result);
+grpc_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
+                                       int url_safe) {
+  grpc_slice result = grpc_slice_malloc(b64_len);
+  unsigned char *current = GRPC_SLICE_START_PTR(result);
   size_t result_size = 0;
   unsigned char codes[4];
   size_t num_codes = 0;
@@ -224,10 +224,10 @@ gpr_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
       !decode_group(codes, num_codes, current, &result_size)) {
     goto fail;
   }
-  GPR_SLICE_SET_LENGTH(result, result_size);
+  GRPC_SLICE_SET_LENGTH(result, result_size);
   return result;
 
 fail:
-  gpr_slice_unref(result);
+  grpc_slice_unref(result);
   return gpr_empty_slice();
 }
diff --git a/src/core/lib/security/util/b64.h b/src/core/lib/security/util/b64.h
index 6908095287..6ea0b5365b 100644
--- a/src/core/lib/security/util/b64.h
+++ b/src/core/lib/security/util/b64.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_LIB_SECURITY_UTIL_B64_H
 #define GRPC_CORE_LIB_SECURITY_UTIL_B64_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 /* Encodes data using base64. It is the caller's responsability to free
    the returned char * using gpr_free. Returns NULL on NULL input. */
@@ -43,10 +43,10 @@ char *grpc_base64_encode(const void *data, size_t data_size, int url_safe,
 
 /* Decodes data according to the base64 specification. Returns an empty
    slice in case of failure. */
-gpr_slice grpc_base64_decode(const char *b64, int url_safe);
+grpc_slice grpc_base64_decode(const char *b64, int url_safe);
 
 /* Same as above except that the length is provided by the caller. */
-gpr_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
-                                      int url_safe);
+grpc_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
+                                       int url_safe);
 
 #endif /* GRPC_CORE_LIB_SECURITY_UTIL_B64_H */
diff --git a/src/core/lib/support/percent_encoding.c b/src/core/lib/slice/percent_encoding.c
index 3c19f264f9..b9e35f1c71 100644
--- a/src/core/lib/support/percent_encoding.c
+++ b/src/core/lib/slice/percent_encoding.c
@@ -31,15 +31,15 @@
  *
  */
 
-#include "src/core/lib/support/percent_encoding.h"
+#include "src/core/lib/slice/percent_encoding.h"
 
 #include <grpc/support/log.h>
 
-const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8] = {
+const uint8_t grpc_url_percent_encoding_unreserved_bytes[256 / 8] = {
     0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xff, 0x03, 0xfe, 0xff, 0xff,
     0x87, 0xfe, 0xff, 0xff, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8] = {
+const uint8_t grpc_compatible_percent_encoding_unreserved_bytes[256 / 8] = {
     0x00, 0x00, 0x00, 0x00, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
     0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
@@ -49,14 +49,14 @@ static bool is_unreserved_character(uint8_t c,
   return ((unreserved_bytes[c / 8] >> (c % 8)) & 1) != 0;
 }
 
-gpr_slice gpr_percent_encode_slice(gpr_slice slice,
-                                   const uint8_t *unreserved_bytes) {
+grpc_slice grpc_percent_encode_slice(grpc_slice slice,
+                                     const uint8_t *unreserved_bytes) {
   static const uint8_t hex[] = "0123456789ABCDEF";
 
   // first pass: count the number of bytes needed to output this string
   size_t output_length = 0;
-  const uint8_t *slice_start = GPR_SLICE_START_PTR(slice);
-  const uint8_t *slice_end = GPR_SLICE_END_PTR(slice);
+  const uint8_t *slice_start = GRPC_SLICE_START_PTR(slice);
+  const uint8_t *slice_end = GRPC_SLICE_END_PTR(slice);
   const uint8_t *p;
   bool any_reserved_bytes = false;
   for (p = slice_start; p < slice_end; p++) {
@@ -66,11 +66,11 @@ gpr_slice gpr_percent_encode_slice(gpr_slice slice,
   }
   // no unreserved bytes: return the string unmodified
   if (!any_reserved_bytes) {
-    return gpr_slice_ref(slice);
+    return grpc_slice_ref(slice);
   }
   // second pass: actually encode
-  gpr_slice out = gpr_slice_malloc(output_length);
-  uint8_t *q = GPR_SLICE_START_PTR(out);
+  grpc_slice out = grpc_slice_malloc(output_length);
+  uint8_t *q = GRPC_SLICE_START_PTR(out);
   for (p = slice_start; p < slice_end; p++) {
     if (is_unreserved_character(*p, unreserved_bytes)) {
       *q++ = *p;
@@ -80,7 +80,7 @@ gpr_slice gpr_percent_encode_slice(gpr_slice slice,
       *q++ = hex[*p & 15];
     }
   }
-  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  GPR_ASSERT(q == GRPC_SLICE_END_PTR(out));
   return out;
 }
 
@@ -97,11 +97,11 @@ static uint8_t dehex(uint8_t c) {
   GPR_UNREACHABLE_CODE(return 255);
 }
 
-bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
-                                     const uint8_t *unreserved_bytes,
-                                     gpr_slice *slice_out) {
-  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
-  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+bool grpc_strict_percent_decode_slice(grpc_slice slice_in,
+                                      const uint8_t *unreserved_bytes,
+                                      grpc_slice *slice_out) {
+  const uint8_t *p = GRPC_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GRPC_SLICE_END_PTR(slice_in);
   size_t out_length = 0;
   bool any_percent_encoded_stuff = false;
   while (p != in_end) {
@@ -119,12 +119,12 @@ bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
     }
   }
   if (!any_percent_encoded_stuff) {
-    *slice_out = gpr_slice_ref(slice_in);
+    *slice_out = grpc_slice_ref(slice_in);
     return true;
   }
-  p = GPR_SLICE_START_PTR(slice_in);
-  *slice_out = gpr_slice_malloc(out_length);
-  uint8_t *q = GPR_SLICE_START_PTR(*slice_out);
+  p = GRPC_SLICE_START_PTR(slice_in);
+  *slice_out = grpc_slice_malloc(out_length);
+  uint8_t *q = GRPC_SLICE_START_PTR(*slice_out);
   while (p != in_end) {
     if (*p == '%') {
       *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
@@ -133,13 +133,13 @@ bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
       *q++ = *p++;
     }
   }
-  GPR_ASSERT(q == GPR_SLICE_END_PTR(*slice_out));
+  GPR_ASSERT(q == GRPC_SLICE_END_PTR(*slice_out));
   return true;
 }
 
-gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in) {
-  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
-  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+grpc_slice grpc_permissive_percent_decode_slice(grpc_slice slice_in) {
+  const uint8_t *p = GRPC_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GRPC_SLICE_END_PTR(slice_in);
   size_t out_length = 0;
   bool any_percent_encoded_stuff = false;
   while (p != in_end) {
@@ -158,11 +158,11 @@ gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in) {
     }
   }
   if (!any_percent_encoded_stuff) {
-    return gpr_slice_ref(slice_in);
+    return grpc_slice_ref(slice_in);
   }
-  p = GPR_SLICE_START_PTR(slice_in);
-  gpr_slice out = gpr_slice_malloc(out_length);
-  uint8_t *q = GPR_SLICE_START_PTR(out);
+  p = GRPC_SLICE_START_PTR(slice_in);
+  grpc_slice out = grpc_slice_malloc(out_length);
+  uint8_t *q = GRPC_SLICE_START_PTR(out);
   while (p != in_end) {
     if (*p == '%') {
       if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
@@ -175,6 +175,6 @@ gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in) {
       *q++ = *p++;
     }
   }
-  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  GPR_ASSERT(q == GRPC_SLICE_END_PTR(out));
   return out;
 }
diff --git a/src/core/lib/support/percent_encoding.h b/src/core/lib/slice/percent_encoding.h
index 000bf14ede..189bdbe312 100644
--- a/src/core/lib/support/percent_encoding.h
+++ b/src/core/lib/slice/percent_encoding.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
-#define GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
+#ifndef GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H
+#define GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H
 
 /* Percent encoding and decoding of slices.
    Transforms arbitrary strings into safe-for-transmission strings by using
@@ -43,36 +43,36 @@
 
 #include <stdbool.h>
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 /* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
-   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   grpc_percent_encode_slice, grpc_strict_percent_decode_slice).
    Flags [A-Za-z0-9-_.~] as unreserved bytes for the percent encoding routines
    */
-extern const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8];
+extern const uint8_t grpc_url_percent_encoding_unreserved_bytes[256 / 8];
 /* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
-   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   grpc_percent_encode_slice, grpc_strict_percent_decode_slice).
    Flags ascii7 non-control characters excluding '%' as unreserved bytes for the
    percent encoding routines */
-extern const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8];
+extern const uint8_t grpc_compatible_percent_encoding_unreserved_bytes[256 / 8];
 
 /* Percent-encode a slice, returning the new slice (this cannot fail):
    unreserved_bytes is a bitfield indicating which bytes are considered
    unreserved and thus do not need percent encoding */
-gpr_slice gpr_percent_encode_slice(gpr_slice slice,
-                                   const uint8_t *unreserved_bytes);
+grpc_slice grpc_percent_encode_slice(grpc_slice slice,
+                                     const uint8_t *unreserved_bytes);
 /* Percent-decode a slice, strictly.
    If the input is legal (contains no unreserved bytes, and legal % encodings),
    returns true and sets *slice_out to the decoded slice.
    If the input is not legal, returns false and leaves *slice_out untouched.
    unreserved_bytes is a bitfield indicating which bytes are considered
    unreserved and thus do not need percent encoding */
-bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
-                                     const uint8_t *unreserved_bytes,
-                                     gpr_slice *slice_out);
+bool grpc_strict_percent_decode_slice(grpc_slice slice_in,
+                                      const uint8_t *unreserved_bytes,
+                                      grpc_slice *slice_out);
 /* Percent-decode a slice, permissively.
    If a % triplet can not be decoded, pass it through verbatim.
    This cannot fail. */
-gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in);
+grpc_slice grpc_permissive_percent_decode_slice(grpc_slice slice_in);
 
-#endif /* GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H */
+#endif /* GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H */
diff --git a/src/core/lib/support/slice.c b/src/core/lib/slice/slice.c
index 8a2c0a9086..52977e6d9a 100644
--- a/src/core/lib/support/slice.c
+++ b/src/core/lib/slice/slice.c
@@ -31,51 +31,51 @@
  *
  */
 
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 
 #include <string.h>
 
-gpr_slice gpr_empty_slice(void) {
-  gpr_slice out;
+grpc_slice gpr_empty_slice(void) {
+  grpc_slice out;
   out.refcount = 0;
   out.data.inlined.length = 0;
   return out;
 }
 
-gpr_slice gpr_slice_ref(gpr_slice slice) {
+grpc_slice grpc_slice_ref(grpc_slice slice) {
   if (slice.refcount) {
     slice.refcount->ref(slice.refcount);
   }
   return slice;
 }
 
-void gpr_slice_unref(gpr_slice slice) {
+void grpc_slice_unref(grpc_slice slice) {
   if (slice.refcount) {
     slice.refcount->unref(slice.refcount);
   }
 }
 
-/* gpr_slice_from_static_string support structure - a refcount that does
+/* grpc_slice_from_static_string support structure - a refcount that does
    nothing */
 static void noop_ref_or_unref(void *unused) {}
 
-static gpr_slice_refcount noop_refcount = {noop_ref_or_unref,
-                                           noop_ref_or_unref};
+static grpc_slice_refcount noop_refcount = {noop_ref_or_unref,
+                                            noop_ref_or_unref};
 
-gpr_slice gpr_slice_from_static_string(const char *s) {
-  gpr_slice slice;
+grpc_slice grpc_slice_from_static_string(const char *s) {
+  grpc_slice slice;
   slice.refcount = &noop_refcount;
   slice.data.refcounted.bytes = (uint8_t *)s;
   slice.data.refcounted.length = strlen(s);
   return slice;
 }
 
-/* gpr_slice_new support structures - we create a refcount object extended
+/* grpc_slice_new support structures - we create a refcount object extended
    with the user provided data pointer & destroy function */
 typedef struct new_slice_refcount {
-  gpr_slice_refcount rc;
+  grpc_slice_refcount rc;
   gpr_refcount refs;
   void (*user_destroy)(void *);
   void *user_data;
@@ -94,10 +94,10 @@ static void new_slice_unref(void *p) {
   }
 }
 
-gpr_slice gpr_slice_new_with_user_data(void *p, size_t len,
-                                       void (*destroy)(void *),
-                                       void *user_data) {
-  gpr_slice slice;
+grpc_slice grpc_slice_new_with_user_data(void *p, size_t len,
+                                         void (*destroy)(void *),
+                                         void *user_data) {
+  grpc_slice slice;
   new_slice_refcount *rc = gpr_malloc(sizeof(new_slice_refcount));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.ref = new_slice_ref;
@@ -111,15 +111,15 @@ gpr_slice gpr_slice_new_with_user_data(void *p, size_t len,
   return slice;
 }
 
-gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *)) {
+grpc_slice grpc_slice_new(void *p, size_t len, void (*destroy)(void *)) {
   /* Pass "p" to *destroy when the slice is no longer needed. */
-  return gpr_slice_new_with_user_data(p, len, destroy, p);
+  return grpc_slice_new_with_user_data(p, len, destroy, p);
 }
 
-/* gpr_slice_new_with_len support structures - we create a refcount object
+/* grpc_slice_new_with_len support structures - we create a refcount object
    extended with the user provided data pointer & destroy function */
 typedef struct new_with_len_slice_refcount {
-  gpr_slice_refcount rc;
+  grpc_slice_refcount rc;
   gpr_refcount refs;
   void *user_data;
   size_t user_length;
@@ -139,9 +139,9 @@ static void new_with_len_unref(void *p) {
   }
 }
 
-gpr_slice gpr_slice_new_with_len(void *p, size_t len,
-                                 void (*destroy)(void *, size_t)) {
-  gpr_slice slice;
+grpc_slice grpc_slice_new_with_len(void *p, size_t len,
+                                   void (*destroy)(void *, size_t)) {
+  grpc_slice slice;
   new_with_len_slice_refcount *rc =
       gpr_malloc(sizeof(new_with_len_slice_refcount));
   gpr_ref_init(&rc->refs, 1);
@@ -157,18 +157,18 @@ gpr_slice gpr_slice_new_with_len(void *p, size_t len,
   return slice;
 }
 
-gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t length) {
-  gpr_slice slice = gpr_slice_malloc(length);
-  memcpy(GPR_SLICE_START_PTR(slice), source, length);
+grpc_slice grpc_slice_from_copied_buffer(const char *source, size_t length) {
+  grpc_slice slice = grpc_slice_malloc(length);
+  memcpy(GRPC_SLICE_START_PTR(slice), source, length);
   return slice;
 }
 
-gpr_slice gpr_slice_from_copied_string(const char *source) {
-  return gpr_slice_from_copied_buffer(source, strlen(source));
+grpc_slice grpc_slice_from_copied_string(const char *source) {
+  return grpc_slice_from_copied_buffer(source, strlen(source));
 }
 
 typedef struct {
-  gpr_slice_refcount base;
+  grpc_slice_refcount base;
   gpr_refcount refs;
 } malloc_refcount;
 
@@ -184,8 +184,8 @@ static void malloc_unref(void *p) {
   }
 }
 
-gpr_slice gpr_slice_malloc(size_t length) {
-  gpr_slice slice;
+grpc_slice grpc_slice_malloc(size_t length) {
+  grpc_slice slice;
 
   if (length > sizeof(slice.data.inlined.bytes)) {
     /* Memory layout used by the slice created here:
@@ -221,8 +221,8 @@ gpr_slice gpr_slice_malloc(size_t length) {
   return slice;
 }
 
-gpr_slice gpr_slice_sub_no_ref(gpr_slice source, size_t begin, size_t end) {
-  gpr_slice subset;
+grpc_slice grpc_slice_sub_no_ref(grpc_slice source, size_t begin, size_t end) {
+  grpc_slice subset;
 
   GPR_ASSERT(end >= begin);
 
@@ -246,24 +246,24 @@ gpr_slice gpr_slice_sub_no_ref(gpr_slice source, size_t begin, size_t end) {
   return subset;
 }
 
-gpr_slice gpr_slice_sub(gpr_slice source, size_t begin, size_t end) {
-  gpr_slice subset;
+grpc_slice grpc_slice_sub(grpc_slice source, size_t begin, size_t end) {
+  grpc_slice subset;
 
   if (end - begin <= sizeof(subset.data.inlined.bytes)) {
     subset.refcount = NULL;
     subset.data.inlined.length = (uint8_t)(end - begin);
-    memcpy(subset.data.inlined.bytes, GPR_SLICE_START_PTR(source) + begin,
+    memcpy(subset.data.inlined.bytes, GRPC_SLICE_START_PTR(source) + begin,
            end - begin);
   } else {
-    subset = gpr_slice_sub_no_ref(source, begin, end);
+    subset = grpc_slice_sub_no_ref(source, begin, end);
     /* Bump the refcount */
     subset.refcount->ref(subset.refcount);
   }
   return subset;
 }
 
-gpr_slice gpr_slice_split_tail(gpr_slice *source, size_t split) {
-  gpr_slice tail;
+grpc_slice grpc_slice_split_tail(grpc_slice *source, size_t split) {
+  grpc_slice tail;
 
   if (source->refcount == NULL) {
     /* inlined data, copy it out */
@@ -297,8 +297,8 @@ gpr_slice gpr_slice_split_tail(gpr_slice *source, size_t split) {
   return tail;
 }
 
-gpr_slice gpr_slice_split_head(gpr_slice *source, size_t split) {
-  gpr_slice head;
+grpc_slice grpc_slice_split_head(grpc_slice *source, size_t split) {
+  grpc_slice head;
 
   if (source->refcount == NULL) {
     GPR_ASSERT(source->data.inlined.length >= split);
@@ -335,16 +335,24 @@ gpr_slice gpr_slice_split_head(gpr_slice *source, size_t split) {
   return head;
 }
 
-int gpr_slice_cmp(gpr_slice a, gpr_slice b) {
-  int d = (int)(GPR_SLICE_LENGTH(a) - GPR_SLICE_LENGTH(b));
+int grpc_slice_cmp(grpc_slice a, grpc_slice b) {
+  int d = (int)(GRPC_SLICE_LENGTH(a) - GRPC_SLICE_LENGTH(b));
   if (d != 0) return d;
-  return memcmp(GPR_SLICE_START_PTR(a), GPR_SLICE_START_PTR(b),
-                GPR_SLICE_LENGTH(a));
+  return memcmp(GRPC_SLICE_START_PTR(a), GRPC_SLICE_START_PTR(b),
+                GRPC_SLICE_LENGTH(a));
 }
 
-int gpr_slice_str_cmp(gpr_slice a, const char *b) {
+int grpc_slice_str_cmp(grpc_slice a, const char *b) {
   size_t b_length = strlen(b);
-  int d = (int)(GPR_SLICE_LENGTH(a) - b_length);
+  int d = (int)(GRPC_SLICE_LENGTH(a) - b_length);
   if (d != 0) return d;
-  return memcmp(GPR_SLICE_START_PTR(a), b, b_length);
+  return memcmp(GRPC_SLICE_START_PTR(a), b, b_length);
+}
+
+int grpc_slice_is_equivalent(grpc_slice a, grpc_slice b) {
+  if (a.refcount == NULL || b.refcount == NULL) {
+    return grpc_slice_cmp(a, b) == 0;
+  }
+  return a.data.refcounted.length == b.data.refcounted.length &&
+         a.data.refcounted.bytes == b.data.refcounted.bytes;
 }
diff --git a/src/core/lib/support/slice_buffer.c b/src/core/lib/slice/slice_buffer.c
index 66f111d767..990ef128bd 100644
--- a/src/core/lib/support/slice_buffer.c
+++ b/src/core/lib/slice/slice_buffer.c
@@ -31,8 +31,8 @@
  *
  */
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice_buffer.h>
 
 #include <string.h>
 
@@ -43,35 +43,35 @@
 /* grow a buffer; requires GRPC_SLICE_BUFFER_INLINE_ELEMENTS > 1 */
 #define GROW(x) (3 * (x) / 2)
 
-static void maybe_embiggen(gpr_slice_buffer *sb) {
+static void maybe_embiggen(grpc_slice_buffer *sb) {
   if (sb->count == sb->capacity) {
     sb->capacity = GROW(sb->capacity);
     GPR_ASSERT(sb->capacity > sb->count);
     if (sb->slices == sb->inlined) {
-      sb->slices = gpr_malloc(sb->capacity * sizeof(gpr_slice));
-      memcpy(sb->slices, sb->inlined, sb->count * sizeof(gpr_slice));
+      sb->slices = gpr_malloc(sb->capacity * sizeof(grpc_slice));
+      memcpy(sb->slices, sb->inlined, sb->count * sizeof(grpc_slice));
     } else {
-      sb->slices = gpr_realloc(sb->slices, sb->capacity * sizeof(gpr_slice));
+      sb->slices = gpr_realloc(sb->slices, sb->capacity * sizeof(grpc_slice));
     }
   }
 }
 
-void gpr_slice_buffer_init(gpr_slice_buffer *sb) {
+void grpc_slice_buffer_init(grpc_slice_buffer *sb) {
   sb->count = 0;
   sb->length = 0;
   sb->capacity = GRPC_SLICE_BUFFER_INLINE_ELEMENTS;
   sb->slices = sb->inlined;
 }
 
-void gpr_slice_buffer_destroy(gpr_slice_buffer *sb) {
-  gpr_slice_buffer_reset_and_unref(sb);
+void grpc_slice_buffer_destroy(grpc_slice_buffer *sb) {
+  grpc_slice_buffer_reset_and_unref(sb);
   if (sb->slices != sb->inlined) {
     gpr_free(sb->slices);
   }
 }
 
-uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t n) {
-  gpr_slice *back;
+uint8_t *grpc_slice_buffer_tiny_add(grpc_slice_buffer *sb, size_t n) {
+  grpc_slice *back;
   uint8_t *out;
 
   sb->length += n;
@@ -94,16 +94,16 @@ add_new:
   return back->data.inlined.bytes;
 }
 
-size_t gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb, gpr_slice s) {
+size_t grpc_slice_buffer_add_indexed(grpc_slice_buffer *sb, grpc_slice s) {
   size_t out = sb->count;
   maybe_embiggen(sb);
   sb->slices[out] = s;
-  sb->length += GPR_SLICE_LENGTH(s);
+  sb->length += GRPC_SLICE_LENGTH(s);
   sb->count = out + 1;
   return out;
 }
 
-void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice s) {
+void grpc_slice_buffer_add(grpc_slice_buffer *sb, grpc_slice s) {
   size_t n = sb->count;
   /* if both the last slice in the slice buffer and the slice being added
      are inlined (that is, that they carry their data inside the slice data
@@ -111,19 +111,20 @@ void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice s) {
      into the back slice, preventing many small slices being passed into
      writes */
   if (!s.refcount && n) {
-    gpr_slice *back = &sb->slices[n - 1];
-    if (!back->refcount && back->data.inlined.length < GPR_SLICE_INLINED_SIZE) {
+    grpc_slice *back = &sb->slices[n - 1];
+    if (!back->refcount &&
+        back->data.inlined.length < GRPC_SLICE_INLINED_SIZE) {
       if (s.data.inlined.length + back->data.inlined.length <=
-          GPR_SLICE_INLINED_SIZE) {
+          GRPC_SLICE_INLINED_SIZE) {
         memcpy(back->data.inlined.bytes + back->data.inlined.length,
                s.data.inlined.bytes, s.data.inlined.length);
         back->data.inlined.length =
             (uint8_t)(back->data.inlined.length + s.data.inlined.length);
       } else {
-        size_t cp1 = GPR_SLICE_INLINED_SIZE - back->data.inlined.length;
+        size_t cp1 = GRPC_SLICE_INLINED_SIZE - back->data.inlined.length;
         memcpy(back->data.inlined.bytes + back->data.inlined.length,
                s.data.inlined.bytes, cp1);
-        back->data.inlined.length = GPR_SLICE_INLINED_SIZE;
+        back->data.inlined.length = GRPC_SLICE_INLINED_SIZE;
         maybe_embiggen(sb);
         back = &sb->slices[n];
         sb->count = n + 1;
@@ -136,35 +137,35 @@ void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice s) {
       return; /* early out */
     }
   }
-  gpr_slice_buffer_add_indexed(sb, s);
+  grpc_slice_buffer_add_indexed(sb, s);
 }
 
-void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *s, size_t n) {
+void grpc_slice_buffer_addn(grpc_slice_buffer *sb, grpc_slice *s, size_t n) {
   size_t i;
   for (i = 0; i < n; i++) {
-    gpr_slice_buffer_add(sb, s[i]);
+    grpc_slice_buffer_add(sb, s[i]);
   }
 }
 
-void gpr_slice_buffer_pop(gpr_slice_buffer *sb) {
+void grpc_slice_buffer_pop(grpc_slice_buffer *sb) {
   if (sb->count != 0) {
     size_t count = --sb->count;
-    sb->length -= GPR_SLICE_LENGTH(sb->slices[count]);
+    sb->length -= GRPC_SLICE_LENGTH(sb->slices[count]);
   }
 }
 
-void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb) {
+void grpc_slice_buffer_reset_and_unref(grpc_slice_buffer *sb) {
   size_t i;
 
   for (i = 0; i < sb->count; i++) {
-    gpr_slice_unref(sb->slices[i]);
+    grpc_slice_unref(sb->slices[i]);
   }
 
   sb->count = 0;
   sb->length = 0;
 }
 
-void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b) {
+void grpc_slice_buffer_swap(grpc_slice_buffer *a, grpc_slice_buffer *b) {
   GPR_SWAP(size_t, a->count, b->count);
   GPR_SWAP(size_t, a->capacity, b->capacity);
   GPR_SWAP(size_t, a->length, b->length);
@@ -172,111 +173,112 @@ void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b) {
   if (a->slices == a->inlined) {
     if (b->slices == b->inlined) {
       /* swap contents of inlined buffer */
-      gpr_slice temp[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
-      memcpy(temp, a->slices, b->count * sizeof(gpr_slice));
-      memcpy(a->slices, b->slices, a->count * sizeof(gpr_slice));
-      memcpy(b->slices, temp, b->count * sizeof(gpr_slice));
+      grpc_slice temp[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
+      memcpy(temp, a->slices, b->count * sizeof(grpc_slice));
+      memcpy(a->slices, b->slices, a->count * sizeof(grpc_slice));
+      memcpy(b->slices, temp, b->count * sizeof(grpc_slice));
     } else {
       /* a is inlined, b is not - copy a inlined into b, fix pointers */
       a->slices = b->slices;
       b->slices = b->inlined;
-      memcpy(b->slices, a->inlined, b->count * sizeof(gpr_slice));
+      memcpy(b->slices, a->inlined, b->count * sizeof(grpc_slice));
     }
   } else if (b->slices == b->inlined) {
     /* b is inlined, a is not - copy b inlined int a, fix pointers */
     b->slices = a->slices;
     a->slices = a->inlined;
-    memcpy(a->slices, b->inlined, a->count * sizeof(gpr_slice));
+    memcpy(a->slices, b->inlined, a->count * sizeof(grpc_slice));
   } else {
     /* no inlining: easy swap */
-    GPR_SWAP(gpr_slice *, a->slices, b->slices);
+    GPR_SWAP(grpc_slice *, a->slices, b->slices);
   }
 }
 
-void gpr_slice_buffer_move_into(gpr_slice_buffer *src, gpr_slice_buffer *dst) {
+void grpc_slice_buffer_move_into(grpc_slice_buffer *src,
+                                 grpc_slice_buffer *dst) {
   /* anything to move? */
   if (src->count == 0) {
     return;
   }
   /* anything in dst? */
   if (dst->count == 0) {
-    gpr_slice_buffer_swap(src, dst);
+    grpc_slice_buffer_swap(src, dst);
     return;
   }
   /* both buffers have data - copy, and reset src */
-  gpr_slice_buffer_addn(dst, src->slices, src->count);
+  grpc_slice_buffer_addn(dst, src->slices, src->count);
   src->count = 0;
   src->length = 0;
 }
 
-void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
-                                 gpr_slice_buffer *dst) {
+void grpc_slice_buffer_move_first(grpc_slice_buffer *src, size_t n,
+                                  grpc_slice_buffer *dst) {
   size_t src_idx;
   size_t output_len = dst->length + n;
   size_t new_input_len = src->length - n;
   GPR_ASSERT(src->length >= n);
   if (src->length == n) {
-    gpr_slice_buffer_move_into(src, dst);
+    grpc_slice_buffer_move_into(src, dst);
     return;
   }
   src_idx = 0;
   while (src_idx < src->capacity) {
-    gpr_slice slice = src->slices[src_idx];
-    size_t slice_len = GPR_SLICE_LENGTH(slice);
+    grpc_slice slice = src->slices[src_idx];
+    size_t slice_len = GRPC_SLICE_LENGTH(slice);
     if (n > slice_len) {
-      gpr_slice_buffer_add(dst, slice);
+      grpc_slice_buffer_add(dst, slice);
       n -= slice_len;
       src_idx++;
     } else if (n == slice_len) {
-      gpr_slice_buffer_add(dst, slice);
+      grpc_slice_buffer_add(dst, slice);
       src_idx++;
       break;
     } else { /* n < slice_len */
-      src->slices[src_idx] = gpr_slice_split_tail(&slice, n);
-      GPR_ASSERT(GPR_SLICE_LENGTH(slice) == n);
-      GPR_ASSERT(GPR_SLICE_LENGTH(src->slices[src_idx]) == slice_len - n);
-      gpr_slice_buffer_add(dst, slice);
+      src->slices[src_idx] = grpc_slice_split_tail(&slice, n);
+      GPR_ASSERT(GRPC_SLICE_LENGTH(slice) == n);
+      GPR_ASSERT(GRPC_SLICE_LENGTH(src->slices[src_idx]) == slice_len - n);
+      grpc_slice_buffer_add(dst, slice);
       break;
     }
   }
   GPR_ASSERT(dst->length == output_len);
   memmove(src->slices, src->slices + src_idx,
-          sizeof(gpr_slice) * (src->count - src_idx));
+          sizeof(grpc_slice) * (src->count - src_idx));
   src->count -= src_idx;
   src->length = new_input_len;
   GPR_ASSERT(src->count > 0);
 }
 
-void gpr_slice_buffer_trim_end(gpr_slice_buffer *sb, size_t n,
-                               gpr_slice_buffer *garbage) {
+void grpc_slice_buffer_trim_end(grpc_slice_buffer *sb, size_t n,
+                                grpc_slice_buffer *garbage) {
   GPR_ASSERT(n <= sb->length);
   sb->length -= n;
   for (;;) {
     size_t idx = sb->count - 1;
-    gpr_slice slice = sb->slices[idx];
-    size_t slice_len = GPR_SLICE_LENGTH(slice);
+    grpc_slice slice = sb->slices[idx];
+    size_t slice_len = GRPC_SLICE_LENGTH(slice);
     if (slice_len > n) {
-      sb->slices[idx] = gpr_slice_split_head(&slice, slice_len - n);
-      gpr_slice_buffer_add_indexed(garbage, slice);
+      sb->slices[idx] = grpc_slice_split_head(&slice, slice_len - n);
+      grpc_slice_buffer_add_indexed(garbage, slice);
       return;
     } else if (slice_len == n) {
-      gpr_slice_buffer_add_indexed(garbage, slice);
+      grpc_slice_buffer_add_indexed(garbage, slice);
       sb->count = idx;
       return;
     } else {
-      gpr_slice_buffer_add_indexed(garbage, slice);
+      grpc_slice_buffer_add_indexed(garbage, slice);
       n -= slice_len;
       sb->count = idx;
     }
   }
 }
 
-gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *sb) {
-  gpr_slice slice;
+grpc_slice grpc_slice_buffer_take_first(grpc_slice_buffer *sb) {
+  grpc_slice slice;
   GPR_ASSERT(sb->count > 0);
   slice = sb->slices[0];
-  memmove(&sb->slices[0], &sb->slices[1], (sb->count - 1) * sizeof(gpr_slice));
+  memmove(&sb->slices[0], &sb->slices[1], (sb->count - 1) * sizeof(grpc_slice));
   sb->count--;
-  sb->length -= GPR_SLICE_LENGTH(slice);
+  sb->length -= GRPC_SLICE_LENGTH(slice);
   return slice;
 }
diff --git a/src/core/lib/slice/slice_string_helpers.c b/src/core/lib/slice/slice_string_helpers.c
new file mode 100644
index 0000000000..4731762ece
--- /dev/null
+++ b/src/core/lib/slice/slice_string_helpers.c
@@ -0,0 +1,89 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/slice/slice_string_helpers.h"
+
+#include <string.h>
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/support/string.h"
+
+char *grpc_dump_slice(grpc_slice s, uint32_t flags) {
+  return gpr_dump((const char *)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s),
+                  flags);
+}
+
+/** Finds the initial (\a begin) and final (\a end) offsets of the next
+ * substring from \a str + \a read_offset until the next \a sep or the end of \a
+ * str.
+ *
+ * Returns 1 and updates \a begin and \a end. Returns 0 otherwise. */
+static int slice_find_separator_offset(const grpc_slice str, const char *sep,
+                                       const size_t read_offset, size_t *begin,
+                                       size_t *end) {
+  size_t i;
+  const uint8_t *str_ptr = GRPC_SLICE_START_PTR(str) + read_offset;
+  const size_t str_len = GRPC_SLICE_LENGTH(str) - read_offset;
+  const size_t sep_len = strlen(sep);
+  if (str_len < sep_len) {
+    return 0;
+  }
+
+  for (i = 0; i <= str_len - sep_len; i++) {
+    if (memcmp(str_ptr + i, sep, sep_len) == 0) {
+      *begin = read_offset;
+      *end = read_offset + i;
+      return 1;
+    }
+  }
+  return 0;
+}
+
+void grpc_slice_split(grpc_slice str, const char *sep, grpc_slice_buffer *dst) {
+  const size_t sep_len = strlen(sep);
+  size_t begin, end;
+
+  GPR_ASSERT(sep_len > 0);
+
+  if (slice_find_separator_offset(str, sep, 0, &begin, &end) != 0) {
+    do {
+      grpc_slice_buffer_add_indexed(dst, grpc_slice_sub(str, begin, end));
+    } while (slice_find_separator_offset(str, sep, end + sep_len, &begin,
+                                         &end) != 0);
+    grpc_slice_buffer_add_indexed(
+        dst, grpc_slice_sub(str, end + sep_len, GRPC_SLICE_LENGTH(str)));
+  } else { /* no sep found, add whole input */
+    grpc_slice_buffer_add_indexed(dst, grpc_slice_ref(str));
+  }
+}
diff --git a/src/core/lib/slice/slice_string_helpers.h b/src/core/lib/slice/slice_string_helpers.h
new file mode 100644
index 0000000000..151c720777
--- /dev/null
+++ b/src/core/lib/slice/slice_string_helpers.h
@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SLICE_SLICE_STRING_HELPERS_H
+#define GRPC_CORE_LIB_SLICE_SLICE_STRING_HELPERS_H
+
+#include <stddef.h>
+
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
+#include <grpc/support/port_platform.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Calls gpr_dump on a slice. */
+char *grpc_dump_slice(grpc_slice slice, uint32_t flags);
+
+/** Split \a str by the separator \a sep. Results are stored in \a dst, which
+ * should be a properly initialized instance. */
+void grpc_slice_split(grpc_slice str, const char *sep, grpc_slice_buffer *dst);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_CORE_LIB_SLICE_SLICE_STRING_HELPERS_H */
diff --git a/src/core/lib/support/backoff.c b/src/core/lib/support/backoff.c
index e89ef47220..0612472712 100644
--- a/src/core/lib/support/backoff.c
+++ b/src/core/lib/support/backoff.c
@@ -35,8 +35,10 @@
 
 #include <grpc/support/useful.h>
 
-void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
+void gpr_backoff_init(gpr_backoff *backoff, int64_t initial_connect_timeout,
+                      double multiplier, double jitter,
                       int64_t min_timeout_millis, int64_t max_timeout_millis) {
+  backoff->initial_connect_timeout = initial_connect_timeout;
   backoff->multiplier = multiplier;
   backoff->jitter = jitter;
   backoff->min_timeout_millis = min_timeout_millis;
@@ -45,9 +47,10 @@ void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
 }
 
 gpr_timespec gpr_backoff_begin(gpr_backoff *backoff, gpr_timespec now) {
-  backoff->current_timeout_millis = backoff->min_timeout_millis;
-  return gpr_time_add(
-      now, gpr_time_from_millis(backoff->current_timeout_millis, GPR_TIMESPAN));
+  backoff->current_timeout_millis = backoff->initial_connect_timeout;
+  const int64_t first_timeout =
+      GPR_MAX(backoff->current_timeout_millis, backoff->min_timeout_millis);
+  return gpr_time_add(now, gpr_time_from_millis(first_timeout, GPR_TIMESPAN));
 }
 
 /* Generate a random number between 0 and 1. */
@@ -57,20 +60,28 @@ static double generate_uniform_random_number(uint32_t *rng_state) {
 }
 
 gpr_timespec gpr_backoff_step(gpr_backoff *backoff, gpr_timespec now) {
-  double new_timeout_millis =
+  const double new_timeout_millis =
       backoff->multiplier * (double)backoff->current_timeout_millis;
-  double jitter_range = backoff->jitter * new_timeout_millis;
-  double jitter =
+  backoff->current_timeout_millis =
+      GPR_MIN((int64_t)new_timeout_millis, backoff->max_timeout_millis);
+
+  const double jitter_range_width = backoff->jitter * new_timeout_millis;
+  const double jitter =
       (2 * generate_uniform_random_number(&backoff->rng_state) - 1) *
-      jitter_range;
+      jitter_range_width;
+
   backoff->current_timeout_millis =
-      GPR_CLAMP((int64_t)(new_timeout_millis + jitter),
-                backoff->min_timeout_millis, backoff->max_timeout_millis);
-  return gpr_time_add(
+      (int64_t)((double)(backoff->current_timeout_millis) + jitter);
+
+  const gpr_timespec current_deadline = gpr_time_add(
       now, gpr_time_from_millis(backoff->current_timeout_millis, GPR_TIMESPAN));
+
+  const gpr_timespec min_deadline = gpr_time_add(
+      now, gpr_time_from_millis(backoff->min_timeout_millis, GPR_TIMESPAN));
+
+  return gpr_time_max(current_deadline, min_deadline);
 }
 
 void gpr_backoff_reset(gpr_backoff *backoff) {
-  // forces step() to return a timeout of min_timeout_millis
-  backoff->current_timeout_millis = 0;
+  backoff->current_timeout_millis = backoff->initial_connect_timeout;
 }
diff --git a/src/core/lib/support/backoff.h b/src/core/lib/support/backoff.h
index 6d40c15546..5e9b740824 100644
--- a/src/core/lib/support/backoff.h
+++ b/src/core/lib/support/backoff.h
@@ -37,7 +37,9 @@
 #include <grpc/support/time.h>
 
 typedef struct {
-  /// const: multiplier between retry attempts
+  /// const:  how long to wait after the first failure before retrying
+  int64_t initial_connect_timeout;
+  /// const: factor with which to multiply backoff after a failed retry
   double multiplier;
   /// const: amount to randomize backoffs
   double jitter;
@@ -54,7 +56,8 @@ typedef struct {
 } gpr_backoff;
 
 /// Initialize backoff machinery - does not need to be destroyed
-void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
+void gpr_backoff_init(gpr_backoff *backoff, int64_t initial_connect_timeout,
+                      double multiplier, double jitter,
                       int64_t min_timeout_millis, int64_t max_timeout_millis);
 
 /// Begin retry loop: returns a timespec for the NEXT retry
diff --git a/src/core/lib/support/env.h b/src/core/lib/support/env.h
index ec3959bc6e..6ada5d9390 100644
--- a/src/core/lib/support/env.h
+++ b/src/core/lib/support/env.h
@@ -36,8 +36,6 @@
 
 #include <stdio.h>
 
-#include <grpc/support/slice.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/src/core/lib/support/string.c b/src/core/lib/support/string.c
index d17fb9da4b..f10a30f0fd 100644
--- a/src/core/lib/support/string.c
+++ b/src/core/lib/support/string.c
@@ -34,7 +34,9 @@
 #include "src/core/lib/support/string.h"
 
 #include <ctype.h>
+#include <limits.h>
 #include <stddef.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -120,11 +122,6 @@ char *gpr_dump(const char *buf, size_t len, uint32_t flags) {
   return out.data;
 }
 
-char *gpr_dump_slice(gpr_slice s, uint32_t flags) {
-  return gpr_dump((const char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s),
-                  flags);
-}
-
 int gpr_parse_bytes_to_uint32(const char *buf, size_t len, uint32_t *result) {
   uint32_t out = 0;
   uint32_t new;
@@ -194,6 +191,13 @@ int int64_ttoa(int64_t value, char *string) {
   return i;
 }
 
+int gpr_parse_nonnegative_int(const char *value) {
+  char *end;
+  long result = strtol(value, &end, 0);
+  if (*end != '\0' || result < 0 || result > INT_MAX) return -1;
+  return (int)result;
+}
+
 char *gpr_leftpad(const char *str, char flag, size_t length) {
   const size_t str_length = strlen(str);
   const size_t out_length = str_length > length ? str_length : length;
@@ -239,50 +243,6 @@ char *gpr_strjoin_sep(const char **strs, size_t nstrs, const char *sep,
   return out;
 }
 
-/** Finds the initial (\a begin) and final (\a end) offsets of the next
- * substring from \a str + \a read_offset until the next \a sep or the end of \a
- * str.
- *
- * Returns 1 and updates \a begin and \a end. Returns 0 otherwise. */
-static int slice_find_separator_offset(const gpr_slice str, const char *sep,
-                                       const size_t read_offset, size_t *begin,
-                                       size_t *end) {
-  size_t i;
-  const uint8_t *str_ptr = GPR_SLICE_START_PTR(str) + read_offset;
-  const size_t str_len = GPR_SLICE_LENGTH(str) - read_offset;
-  const size_t sep_len = strlen(sep);
-  if (str_len < sep_len) {
-    return 0;
-  }
-
-  for (i = 0; i <= str_len - sep_len; i++) {
-    if (memcmp(str_ptr + i, sep, sep_len) == 0) {
-      *begin = read_offset;
-      *end = read_offset + i;
-      return 1;
-    }
-  }
-  return 0;
-}
-
-void gpr_slice_split(gpr_slice str, const char *sep, gpr_slice_buffer *dst) {
-  const size_t sep_len = strlen(sep);
-  size_t begin, end;
-
-  GPR_ASSERT(sep_len > 0);
-
-  if (slice_find_separator_offset(str, sep, 0, &begin, &end) != 0) {
-    do {
-      gpr_slice_buffer_add_indexed(dst, gpr_slice_sub(str, begin, end));
-    } while (slice_find_separator_offset(str, sep, end + sep_len, &begin,
-                                         &end) != 0);
-    gpr_slice_buffer_add_indexed(
-        dst, gpr_slice_sub(str, end + sep_len, GPR_SLICE_LENGTH(str)));
-  } else { /* no sep found, add whole input */
-    gpr_slice_buffer_add_indexed(dst, gpr_slice_ref(str));
-  }
-}
-
 void gpr_strvec_init(gpr_strvec *sv) { memset(sv, 0, sizeof(*sv)); }
 
 void gpr_strvec_destroy(gpr_strvec *sv) {
diff --git a/src/core/lib/support/string.h b/src/core/lib/support/string.h
index 9a94e9471c..e933e2eb46 100644
--- a/src/core/lib/support/string.h
+++ b/src/core/lib/support/string.h
@@ -36,9 +36,9 @@
 
 #include <stddef.h>
 
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -54,9 +54,6 @@ extern "C" {
    Result should be freed with gpr_free() */
 char *gpr_dump(const char *buf, size_t len, uint32_t flags);
 
-/* Calls gpr_dump on a slice. */
-char *gpr_dump_slice(gpr_slice slice, uint32_t flags);
-
 /* Parses an array of bytes into an integer (base 10). Returns 1 on success,
    0 on failure. */
 int gpr_parse_bytes_to_uint32(const char *data, size_t length,
@@ -80,6 +77,9 @@ NOTE: This function ensures sufficient bit width even on Win x64,
 where long is 32bit is size.*/
 int int64_ttoa(int64_t value, char *output);
 
+// Parses a non-negative number from a value string.  Returns -1 on error.
+int gpr_parse_nonnegative_int(const char *value);
+
 /* Reverse a run of bytes */
 void gpr_reverse_bytes(char *str, int len);
 
@@ -98,10 +98,6 @@ char *gpr_strjoin(const char **strs, size_t nstrs, size_t *total_length);
 char *gpr_strjoin_sep(const char **strs, size_t nstrs, const char *sep,
                       size_t *total_length);
 
-/** Split \a str by the separator \a sep. Results are stored in \a dst, which
- * should be a properly initialized instance. */
-void gpr_slice_split(gpr_slice str, const char *sep, gpr_slice_buffer *dst);
-
 /* A vector of strings... for building up a final string one piece at a time */
 typedef struct {
   char **strs;
diff --git a/src/core/lib/support/subprocess_posix.c b/src/core/lib/support/subprocess_posix.c
index 4f4de9298e..4247a1c12b 100644
--- a/src/core/lib/support/subprocess_posix.c
+++ b/src/core/lib/support/subprocess_posix.c
@@ -40,6 +40,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <signal.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -52,7 +53,7 @@
 
 struct gpr_subprocess {
   int pid;
-  int joined;
+  bool joined;
 };
 
 const char *gpr_subprocess_binary_extension() { return ""; }
@@ -97,9 +98,11 @@ retry:
     if (errno == EINTR) {
       goto retry;
     }
-    gpr_log(GPR_ERROR, "waitpid failed: %s", strerror(errno));
+    gpr_log(GPR_ERROR, "waitpid failed for pid %d: %s", p->pid,
+            strerror(errno));
     return -1;
   }
+  p->joined = true;
   return status;
 }
 
diff --git a/src/core/lib/support/tmpfile.h b/src/core/lib/support/tmpfile.h
index 059142ab0f..8952e5ec3d 100644
--- a/src/core/lib/support/tmpfile.h
+++ b/src/core/lib/support/tmpfile.h
@@ -36,7 +36,7 @@
 
 #include <stdio.h>
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/core/lib/surface/byte_buffer.c b/src/core/lib/surface/byte_buffer.c
index 054a6e6c58..d646591a65 100644
--- a/src/core/lib/surface/byte_buffer.c
+++ b/src/core/lib/surface/byte_buffer.c
@@ -35,22 +35,23 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
-grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+grpc_byte_buffer *grpc_raw_byte_buffer_create(grpc_slice *slices,
                                               size_t nslices) {
   return grpc_raw_compressed_byte_buffer_create(slices, nslices,
                                                 GRPC_COMPRESS_NONE);
 }
 
 grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
-    gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression) {
+    grpc_slice *slices, size_t nslices,
+    grpc_compression_algorithm compression) {
   size_t i;
   grpc_byte_buffer *bb = gpr_malloc(sizeof(grpc_byte_buffer));
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = compression;
-  gpr_slice_buffer_init(&bb->data.raw.slice_buffer);
+  grpc_slice_buffer_init(&bb->data.raw.slice_buffer);
   for (i = 0; i < nslices; i++) {
-    gpr_slice_ref(slices[i]);
-    gpr_slice_buffer_add(&bb->data.raw.slice_buffer, slices[i]);
+    grpc_slice_ref(slices[i]);
+    grpc_slice_buffer_add(&bb->data.raw.slice_buffer, slices[i]);
   }
   return bb;
 }
@@ -58,13 +59,13 @@ grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
 grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
     grpc_byte_buffer_reader *reader) {
   grpc_byte_buffer *bb = gpr_malloc(sizeof(grpc_byte_buffer));
-  gpr_slice slice;
+  grpc_slice slice;
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = GRPC_COMPRESS_NONE;
-  gpr_slice_buffer_init(&bb->data.raw.slice_buffer);
+  grpc_slice_buffer_init(&bb->data.raw.slice_buffer);
 
   while (grpc_byte_buffer_reader_next(reader, &slice)) {
-    gpr_slice_buffer_add(&bb->data.raw.slice_buffer, slice);
+    grpc_slice_buffer_add(&bb->data.raw.slice_buffer, slice);
   }
   return bb;
 }
@@ -83,7 +84,7 @@ void grpc_byte_buffer_destroy(grpc_byte_buffer *bb) {
   if (!bb) return;
   switch (bb->type) {
     case GRPC_BB_RAW:
-      gpr_slice_buffer_destroy(&bb->data.raw.slice_buffer);
+      grpc_slice_buffer_destroy(&bb->data.raw.slice_buffer);
       break;
   }
   gpr_free(bb);
diff --git a/src/core/lib/surface/byte_buffer_reader.c b/src/core/lib/surface/byte_buffer_reader.c
index 310bacb2c9..0089959fbb 100644
--- a/src/core/lib/surface/byte_buffer_reader.c
+++ b/src/core/lib/surface/byte_buffer_reader.c
@@ -37,9 +37,9 @@
 #include <grpc/byte_buffer.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice_buffer.h>
 
 #include "src/core/lib/compression/message_compress.h"
 
@@ -56,11 +56,11 @@ static int is_compressed(grpc_byte_buffer *buffer) {
 
 int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
                                  grpc_byte_buffer *buffer) {
-  gpr_slice_buffer decompressed_slices_buffer;
+  grpc_slice_buffer decompressed_slices_buffer;
   reader->buffer_in = buffer;
   switch (reader->buffer_in->type) {
     case GRPC_BB_RAW:
-      gpr_slice_buffer_init(&decompressed_slices_buffer);
+      grpc_slice_buffer_init(&decompressed_slices_buffer);
       if (is_compressed(reader->buffer_in)) {
         if (grpc_msg_decompress(reader->buffer_in->data.raw.compression,
                                 &reader->buffer_in->data.raw.slice_buffer,
@@ -76,7 +76,7 @@ int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
               grpc_raw_byte_buffer_create(decompressed_slices_buffer.slices,
                                           decompressed_slices_buffer.count);
         }
-        gpr_slice_buffer_destroy(&decompressed_slices_buffer);
+        grpc_slice_buffer_destroy(&decompressed_slices_buffer);
       } else { /* not compressed, use the input buffer as output */
         reader->buffer_out = reader->buffer_in;
       }
@@ -98,13 +98,13 @@ void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) {
 }
 
 int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                 gpr_slice *slice) {
+                                 grpc_slice *slice) {
   switch (reader->buffer_in->type) {
     case GRPC_BB_RAW: {
-      gpr_slice_buffer *slice_buffer;
+      grpc_slice_buffer *slice_buffer;
       slice_buffer = &reader->buffer_out->data.raw.slice_buffer;
       if (reader->current.index < slice_buffer->count) {
-        *slice = gpr_slice_ref(slice_buffer->slices[reader->current.index]);
+        *slice = grpc_slice_ref(slice_buffer->slices[reader->current.index]);
         reader->current.index += 1;
         return 1;
       }
@@ -114,18 +114,18 @@ int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
   return 0;
 }
 
-gpr_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader) {
-  gpr_slice in_slice;
+grpc_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader) {
+  grpc_slice in_slice;
   size_t bytes_read = 0;
   const size_t input_size = grpc_byte_buffer_length(reader->buffer_out);
-  gpr_slice out_slice = gpr_slice_malloc(input_size);
-  uint8_t *const outbuf = GPR_SLICE_START_PTR(out_slice); /* just an alias */
+  grpc_slice out_slice = grpc_slice_malloc(input_size);
+  uint8_t *const outbuf = GRPC_SLICE_START_PTR(out_slice); /* just an alias */
 
   while (grpc_byte_buffer_reader_next(reader, &in_slice) != 0) {
-    const size_t slice_length = GPR_SLICE_LENGTH(in_slice);
-    memcpy(&(outbuf[bytes_read]), GPR_SLICE_START_PTR(in_slice), slice_length);
+    const size_t slice_length = GRPC_SLICE_LENGTH(in_slice);
+    memcpy(&(outbuf[bytes_read]), GRPC_SLICE_START_PTR(in_slice), slice_length);
     bytes_read += slice_length;
-    gpr_slice_unref(in_slice);
+    grpc_slice_unref(in_slice);
     GPR_ASSERT(bytes_read <= input_size);
   }
   return out_slice;
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index 6c25952c0a..8ca3cab9d5 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -39,9 +39,9 @@
 
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
@@ -49,6 +49,7 @@
 #include "src/core/lib/compression/algorithm_metadata.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
@@ -122,6 +123,7 @@ struct grpc_call {
   grpc_channel *channel;
   grpc_call *parent;
   grpc_call *first_child;
+  gpr_timespec start_time;
   /* TODO(ctiller): share with cq if possible? */
   gpr_mu mu;
 
@@ -184,7 +186,7 @@ struct grpc_call {
   grpc_slice_buffer_stream sending_stream;
   grpc_byte_stream *receiving_stream;
   grpc_byte_buffer **receiving_buffer;
-  gpr_slice receiving_slice;
+  grpc_slice receiving_slice;
   grpc_closure receiving_slice_ready;
   grpc_closure receiving_stream_ready;
   grpc_closure receiving_initial_metadata_ready;
@@ -239,6 +241,7 @@ grpc_error *grpc_call_create(const grpc_call_create_args *args,
   call->channel = args->channel;
   call->cq = args->cq;
   call->parent = args->parent_call;
+  call->start_time = gpr_now(GPR_CLOCK_MONOTONIC);
   /* Always support no compression */
   GPR_BITSET(&call->encodings_accepted_by_peer, GRPC_COMPRESS_NONE);
   call->is_client = args->server_transport_data == NULL;
@@ -311,10 +314,10 @@ grpc_error *grpc_call_create(const grpc_call_create_args *args,
 
   GRPC_CHANNEL_INTERNAL_REF(args->channel, "call");
   /* initial refcount dropped by grpc_call_destroy */
-  grpc_error *error =
-      grpc_call_stack_init(&exec_ctx, channel_stack, 1, destroy_call, call,
-                           call->context, args->server_transport_data, path,
-                           send_deadline, CALL_STACK_FROM_CALL(call));
+  grpc_error *error = grpc_call_stack_init(
+      &exec_ctx, channel_stack, 1, destroy_call, call, call->context,
+      args->server_transport_data, path, call->start_time, send_deadline,
+      CALL_STACK_FROM_CALL(call));
   if (error != GRPC_ERROR_NONE) {
     grpc_status_code status;
     const char *error_str;
@@ -427,6 +430,8 @@ static void destroy_call(grpc_exec_ctx *exec_ctx, void *call,
 
   get_final_status(call, set_status_value_directly,
                    &c->final_info.final_status);
+  c->final_info.stats.latency =
+      gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), c->start_time);
 
   grpc_call_stack_destroy(exec_ctx, CALL_STACK_FROM_CALL(c), &c->final_info, c);
   GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, "call");
@@ -493,8 +498,8 @@ static void destroy_encodings_accepted_by_peer(void *p) { return; }
 static void set_encodings_accepted_by_peer(grpc_call *call, grpc_mdelem *mdel) {
   size_t i;
   grpc_compression_algorithm algorithm;
-  gpr_slice_buffer accept_encoding_parts;
-  gpr_slice accept_encoding_slice;
+  grpc_slice_buffer accept_encoding_parts;
+  grpc_slice accept_encoding_slice;
   void *accepted_user_data;
 
   accepted_user_data =
@@ -506,23 +511,23 @@ static void set_encodings_accepted_by_peer(grpc_call *call, grpc_mdelem *mdel) {
   }
 
   accept_encoding_slice = mdel->value->slice;
-  gpr_slice_buffer_init(&accept_encoding_parts);
-  gpr_slice_split(accept_encoding_slice, ",", &accept_encoding_parts);
+  grpc_slice_buffer_init(&accept_encoding_parts);
+  grpc_slice_split(accept_encoding_slice, ",", &accept_encoding_parts);
 
   /* No need to zero call->encodings_accepted_by_peer: grpc_call_create already
    * zeroes the whole grpc_call */
   /* Always support no compression */
   GPR_BITSET(&call->encodings_accepted_by_peer, GRPC_COMPRESS_NONE);
   for (i = 0; i < accept_encoding_parts.count; i++) {
-    const gpr_slice *accept_encoding_entry_slice =
+    const grpc_slice *accept_encoding_entry_slice =
         &accept_encoding_parts.slices[i];
     if (grpc_compression_algorithm_parse(
-            (const char *)GPR_SLICE_START_PTR(*accept_encoding_entry_slice),
-            GPR_SLICE_LENGTH(*accept_encoding_entry_slice), &algorithm)) {
+            (const char *)GRPC_SLICE_START_PTR(*accept_encoding_entry_slice),
+            GRPC_SLICE_LENGTH(*accept_encoding_entry_slice), &algorithm)) {
       GPR_BITSET(&call->encodings_accepted_by_peer, algorithm);
     } else {
       char *accept_encoding_entry_str =
-          gpr_dump_slice(*accept_encoding_entry_slice, GPR_DUMP_ASCII);
+          grpc_dump_slice(*accept_encoding_entry_slice, GPR_DUMP_ASCII);
       gpr_log(GPR_ERROR,
               "Invalid entry in accept encoding metadata: '%s'. Ignoring.",
               accept_encoding_entry_str);
@@ -530,7 +535,7 @@ static void set_encodings_accepted_by_peer(grpc_call *call, grpc_mdelem *mdel) {
     }
   }
 
-  gpr_slice_buffer_destroy(&accept_encoding_parts);
+  grpc_slice_buffer_destroy(&accept_encoding_parts);
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
@@ -551,14 +556,14 @@ static void get_final_details(grpc_call *call, char **out_details,
   for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
     if (call->status[i].is_set) {
       if (call->status[i].details) {
-        gpr_slice details = call->status[i].details->slice;
-        size_t len = GPR_SLICE_LENGTH(details);
+        grpc_slice details = call->status[i].details->slice;
+        size_t len = GRPC_SLICE_LENGTH(details);
         if (len + 1 > *out_details_capacity) {
           *out_details_capacity =
               GPR_MAX(len + 1, *out_details_capacity * 3 / 2);
           *out_details = gpr_realloc(*out_details, *out_details_capacity);
         }
-        memcpy(*out_details, GPR_SLICE_START_PTR(details), len);
+        memcpy(*out_details, GRPC_SLICE_START_PTR(details), len);
         (*out_details)[len] = 0;
       } else {
         goto no_details;
@@ -632,9 +637,6 @@ static int prepare_application_metadata(grpc_call *call, int count,
     if (call->send_extra_metadata_count == 0) {
       prepend_extra_metadata = 0;
     } else {
-      for (i = 0; i < call->send_extra_metadata_count; i++) {
-        GRPC_MDELEM_REF(call->send_extra_metadata[i].md);
-      }
       for (i = 1; i < call->send_extra_metadata_count; i++) {
         call->send_extra_metadata[i].prev = &call->send_extra_metadata[i - 1];
       }
@@ -680,6 +682,7 @@ static int prepare_application_metadata(grpc_call *call, int count,
           &call->send_extra_metadata[call->send_extra_metadata_count - 1];
       batch->list.head->prev = NULL;
       batch->list.tail->next = NULL;
+      call->send_extra_metadata_count = 0;
       break;
     case 3: {
       /* prepend AND md */
@@ -695,6 +698,7 @@ static int prepare_application_metadata(grpc_call *call, int count,
       batch->list.tail = linked_from_md(last_md);
       batch->list.head->prev = NULL;
       batch->list.tail->next = NULL;
+      call->send_extra_metadata_count = 0;
       break;
     }
     default:
@@ -900,7 +904,7 @@ static uint32_t decode_status(grpc_mdelem *md) {
     status = ((uint32_t)(intptr_t)user_data) - STATUS_OFFSET;
   } else {
     if (!gpr_parse_bytes_to_uint32(grpc_mdstr_as_c_string(md->value),
-                                   GPR_SLICE_LENGTH(md->value->slice),
+                                   GRPC_SLICE_LENGTH(md->value->slice),
                                    &status)) {
       status = GRPC_STATUS_UNKNOWN; /* could not parse status code */
     }
@@ -953,7 +957,7 @@ static grpc_mdelem *publish_app_metadata(grpc_call *call, grpc_mdelem *elem,
   mdusr = &dest->metadata[dest->count++];
   mdusr->key = grpc_mdstr_as_c_string(elem->key);
   mdusr->value = grpc_mdstr_as_c_string(elem->value);
-  mdusr->value_length = GPR_SLICE_LENGTH(elem->value->slice);
+  mdusr->value_length = GRPC_SLICE_LENGTH(elem->value->slice);
   GPR_TIMER_END("publish_app_metadata", 0);
   return elem;
 }
@@ -1085,8 +1089,8 @@ static void continue_receiving_slices(grpc_exec_ctx *exec_ctx,
     if (grpc_byte_stream_next(exec_ctx, call->receiving_stream,
                               &call->receiving_slice, remaining,
                               &call->receiving_slice_ready)) {
-      gpr_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
-                           call->receiving_slice);
+      grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
+                            call->receiving_slice);
     } else {
       return;
     }
@@ -1099,8 +1103,8 @@ static void receiving_slice_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
   grpc_call *call = bctl->call;
 
   if (error == GRPC_ERROR_NONE) {
-    gpr_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
-                         call->receiving_slice);
+    grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
+                          call->receiving_slice);
     continue_receiving_slices(exec_ctx, bctl);
   } else {
     if (grpc_trace_operation_failures) {
@@ -1461,6 +1465,12 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         grpc_slice_buffer_stream_init(
             &call->sending_stream,
             &op->data.send_message->data.raw.slice_buffer, op->flags);
+        /* If the outgoing buffer is already compressed, mark it as so in the
+           flags. These will be picked up by the compression filter and further
+           (wasteful) attempts at compression skipped. */
+        if (op->data.send_message->data.raw.compression > GRPC_COMPRESS_NONE) {
+          call->sending_stream.base.flags |= GRPC_WRITE_INTERNAL_COMPRESS;
+        }
         stream_op->send_message = &call->sending_stream.base;
         break;
       case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
@@ -1541,6 +1551,10 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
           error = GRPC_CALL_ERROR_TOO_MANY_OPERATIONS;
           goto done_with_error;
         }
+        /* IF this is a server, then GRPC_OP_RECV_INITIAL_METADATA *must* come
+           from server.c. In that case, it's coming from accept_stream, and in
+           that case we're not necessarily covered by a poller. */
+        stream_op->covered_by_poller = call->is_client;
         call->received_initial_metadata = 1;
         call->buffered_metadata[0] = op->data.recv_initial_metadata;
         grpc_closure_init(&call->receiving_initial_metadata_ready,
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 92d783b78d..9405015c50 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -86,87 +86,90 @@ grpc_channel *grpc_channel_create(grpc_exec_ctx *exec_ctx, const char *target,
                                   const grpc_channel_args *input_args,
                                   grpc_channel_stack_type channel_stack_type,
                                   grpc_transport *optional_transport) {
-  bool is_client = grpc_channel_stack_type_is_client(channel_stack_type);
-
   grpc_channel_stack_builder *builder = grpc_channel_stack_builder_create();
   grpc_channel_stack_builder_set_channel_arguments(builder, input_args);
   grpc_channel_stack_builder_set_target(builder, target);
   grpc_channel_stack_builder_set_transport(builder, optional_transport);
-  grpc_channel *channel;
-  grpc_channel_args *args;
   if (!grpc_channel_init_create_stack(exec_ctx, builder, channel_stack_type)) {
     grpc_channel_stack_builder_destroy(builder);
     return NULL;
-  } else {
-    args = grpc_channel_args_copy(
-        grpc_channel_stack_builder_get_channel_arguments(builder));
-    channel = grpc_channel_stack_builder_finish(
-        exec_ctx, builder, sizeof(grpc_channel), 1, destroy_channel, NULL);
+  }
+  grpc_channel_args *args = grpc_channel_args_copy(
+      grpc_channel_stack_builder_get_channel_arguments(builder));
+  grpc_channel *channel;
+  grpc_error *error = grpc_channel_stack_builder_finish(
+      exec_ctx, builder, sizeof(grpc_channel), 1, destroy_channel, NULL,
+      (void **)&channel);
+  if (error != GRPC_ERROR_NONE) {
+    const char *msg = grpc_error_string(error);
+    gpr_log(GPR_ERROR, "channel stack builder failed: %s", msg);
+    grpc_error_free_string(msg);
+    GRPC_ERROR_UNREF(error);
+    goto done;
   }
 
   memset(channel, 0, sizeof(*channel));
   channel->target = gpr_strdup(target);
-  channel->is_client = is_client;
+  channel->is_client = grpc_channel_stack_type_is_client(channel_stack_type);
   gpr_mu_init(&channel->registered_call_mu);
   channel->registered_calls = NULL;
 
   grpc_compression_options_init(&channel->compression_options);
-  if (args) {
-    for (size_t i = 0; i < args->num_args; i++) {
-      if (0 == strcmp(args->args[i].key, GRPC_ARG_DEFAULT_AUTHORITY)) {
-        if (args->args[i].type != GRPC_ARG_STRING) {
-          gpr_log(GPR_ERROR, "%s ignored: it must be a string",
-                  GRPC_ARG_DEFAULT_AUTHORITY);
-        } else {
-          if (channel->default_authority) {
-            /* setting this takes precedence over anything else */
-            GRPC_MDELEM_UNREF(channel->default_authority);
-          }
-          channel->default_authority = grpc_mdelem_from_strings(
-              ":authority", args->args[i].value.string);
+
+  for (size_t i = 0; i < args->num_args; i++) {
+    if (0 == strcmp(args->args[i].key, GRPC_ARG_DEFAULT_AUTHORITY)) {
+      if (args->args[i].type != GRPC_ARG_STRING) {
+        gpr_log(GPR_ERROR, "%s ignored: it must be a string",
+                GRPC_ARG_DEFAULT_AUTHORITY);
+      } else {
+        if (channel->default_authority) {
+          /* setting this takes precedence over anything else */
+          GRPC_MDELEM_UNREF(channel->default_authority);
         }
-      } else if (0 ==
-                 strcmp(args->args[i].key, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG)) {
-        if (args->args[i].type != GRPC_ARG_STRING) {
-          gpr_log(GPR_ERROR, "%s ignored: it must be a string",
+        channel->default_authority =
+            grpc_mdelem_from_strings(":authority", args->args[i].value.string);
+      }
+    } else if (0 ==
+               strcmp(args->args[i].key, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG)) {
+      if (args->args[i].type != GRPC_ARG_STRING) {
+        gpr_log(GPR_ERROR, "%s ignored: it must be a string",
+                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
+      } else {
+        if (channel->default_authority) {
+          /* other ways of setting this (notably ssl) take precedence */
+          gpr_log(GPR_ERROR,
+                  "%s ignored: default host already set some other way",
                   GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
         } else {
-          if (channel->default_authority) {
-            /* other ways of setting this (notably ssl) take precedence */
-            gpr_log(GPR_ERROR,
-                    "%s ignored: default host already set some other way",
-                    GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
-          } else {
-            channel->default_authority = grpc_mdelem_from_strings(
-                ":authority", args->args[i].value.string);
-          }
+          channel->default_authority = grpc_mdelem_from_strings(
+              ":authority", args->args[i].value.string);
         }
-      } else if (0 == strcmp(args->args[i].key,
-                             GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL)) {
-        channel->compression_options.default_level.is_set = true;
-        GPR_ASSERT(args->args[i].value.integer >= 0 &&
-                   args->args[i].value.integer < GRPC_COMPRESS_LEVEL_COUNT);
-        channel->compression_options.default_level.level =
-            (grpc_compression_level)args->args[i].value.integer;
-      } else if (0 == strcmp(args->args[i].key,
-                             GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM)) {
-        channel->compression_options.default_algorithm.is_set = true;
-        GPR_ASSERT(args->args[i].value.integer >= 0 &&
-                   args->args[i].value.integer <
-                       GRPC_COMPRESS_ALGORITHMS_COUNT);
-        channel->compression_options.default_algorithm.algorithm =
-            (grpc_compression_algorithm)args->args[i].value.integer;
-      } else if (0 ==
-                 strcmp(args->args[i].key,
-                        GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
-        channel->compression_options.enabled_algorithms_bitset =
-            (uint32_t)args->args[i].value.integer |
-            0x1; /* always support no compression */
       }
+    } else if (0 == strcmp(args->args[i].key,
+                           GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL)) {
+      channel->compression_options.default_level.is_set = true;
+      GPR_ASSERT(args->args[i].value.integer >= 0 &&
+                 args->args[i].value.integer < GRPC_COMPRESS_LEVEL_COUNT);
+      channel->compression_options.default_level.level =
+          (grpc_compression_level)args->args[i].value.integer;
+    } else if (0 == strcmp(args->args[i].key,
+                           GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM)) {
+      channel->compression_options.default_algorithm.is_set = true;
+      GPR_ASSERT(args->args[i].value.integer >= 0 &&
+                 args->args[i].value.integer < GRPC_COMPRESS_ALGORITHMS_COUNT);
+      channel->compression_options.default_algorithm.algorithm =
+          (grpc_compression_algorithm)args->args[i].value.integer;
+    } else if (0 ==
+               strcmp(args->args[i].key,
+                      GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
+      channel->compression_options.enabled_algorithms_bitset =
+          (uint32_t)args->args[i].value.integer |
+          0x1; /* always support no compression */
     }
-    grpc_channel_args_destroy(args);
   }
 
+done:
+  grpc_channel_args_destroy(args);
   return channel;
 }
 
@@ -175,6 +178,15 @@ char *grpc_channel_get_target(grpc_channel *channel) {
   return gpr_strdup(channel->target);
 }
 
+void grpc_channel_get_info(grpc_channel *channel,
+                           const grpc_channel_info *channel_info) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_channel_element *elem =
+      grpc_channel_stack_element(CHANNEL_STACK_FROM_CHANNEL(channel), 0);
+  elem->filter->get_channel_info(&exec_ctx, elem, channel_info);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
 static grpc_call *grpc_channel_create_call_internal(
     grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask,
     grpc_completion_queue *cq, grpc_pollset_set *pollset_set_alternative,
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 4e0feb56ac..184c1a1a16 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -354,11 +354,13 @@ static void dump_pending_tags(grpc_completion_queue *cc) {
   gpr_strvec v;
   gpr_strvec_init(&v);
   gpr_strvec_add(&v, gpr_strdup("PENDING TAGS:"));
+  gpr_mu_lock(cc->mu);
   for (size_t i = 0; i < cc->outstanding_tag_count; i++) {
     char *s;
     gpr_asprintf(&s, " %p", cc->outstanding_tags[i]);
     gpr_strvec_add(&v, s);
   }
+  gpr_mu_unlock(cc->mu);
   char *out = gpr_strvec_flatten(&v, NULL);
   gpr_strvec_destroy(&v);
   gpr_log(GPR_DEBUG, "%s", out);
diff --git a/src/core/lib/surface/lame_client.c b/src/core/lib/surface/lame_client.c
index d32c884e8e..57da94ac1e 100644
--- a/src/core/lib/surface/lame_client.c
+++ b/src/core/lib/surface/lame_client.c
@@ -88,6 +88,10 @@ static char *lame_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
   return NULL;
 }
 
+static void lame_get_channel_info(grpc_exec_ctx *exec_ctx,
+                                  grpc_channel_element *elem,
+                                  const grpc_channel_info *channel_info) {}
+
 static void lame_start_transport_op(grpc_exec_ctx *exec_ctx,
                                     grpc_channel_element *elem,
                                     grpc_transport_op *op) {
@@ -119,11 +123,12 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
   gpr_free(and_free_memory);
 }
 
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(args->is_last);
+  return GRPC_ERROR_NONE;
 }
 
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
@@ -140,6 +145,7 @@ const grpc_channel_filter grpc_lame_filter = {
     init_channel_elem,
     destroy_channel_elem,
     lame_get_peer,
+    lame_get_channel_info,
     "lame-client",
 };
 
diff --git a/src/core/lib/surface/server.c b/src/core/lib/surface/server.c
index 3a90308058..62d7afc8da 100644
--- a/src/core/lib/surface/server.c
+++ b/src/core/lib/surface/server.c
@@ -195,6 +195,7 @@ struct grpc_server {
   grpc_completion_queue **cqs;
   grpc_pollset **pollsets;
   size_t cq_count;
+  size_t pollset_count;
   bool started;
 
   /* The two following mutexes control access to server-state
@@ -264,13 +265,13 @@ static void channel_broadcaster_init(grpc_server *s, channel_broadcaster *cb) {
 
 struct shutdown_cleanup_args {
   grpc_closure closure;
-  gpr_slice slice;
+  grpc_slice slice;
 };
 
 static void shutdown_cleanup(grpc_exec_ctx *exec_ctx, void *arg,
                              grpc_error *error) {
   struct shutdown_cleanup_args *a = arg;
-  gpr_slice_unref(a->slice);
+  grpc_slice_unref(a->slice);
   gpr_free(a);
 }
 
@@ -283,7 +284,7 @@ static void send_shutdown(grpc_exec_ctx *exec_ctx, grpc_channel *channel,
 
   op->send_goaway = send_goaway;
   op->set_accept_stream = true;
-  sc->slice = gpr_slice_from_copied_string("Server shutdown");
+  sc->slice = grpc_slice_from_copied_string("Server shutdown");
   op->goaway_message = &sc->slice;
   op->goaway_status = GRPC_STATUS_OK;
   op->disconnect_with_error = send_disconnect;
@@ -459,8 +460,8 @@ static void destroy_channel(grpc_exec_ctx *exec_ctx, channel_data *chand,
 }
 
 static void cpstr(char **dest, size_t *capacity, grpc_mdstr *value) {
-  gpr_slice slice = value->slice;
-  size_t len = GPR_SLICE_LENGTH(slice);
+  grpc_slice slice = value->slice;
+  size_t len = GRPC_SLICE_LENGTH(slice);
 
   if (len + 1 > *capacity) {
     *capacity = GPR_MAX(len + 1, *capacity * 2);
@@ -913,9 +914,9 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
   server_unref(exec_ctx, chand->server);
 }
 
-static void init_channel_elem(grpc_exec_ctx *exec_ctx,
-                              grpc_channel_element *elem,
-                              grpc_channel_element_args *args) {
+static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
+                                     grpc_channel_element *elem,
+                                     grpc_channel_element_args *args) {
   channel_data *chand = elem->channel_data;
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(!args->is_last);
@@ -926,6 +927,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
   chand->connectivity_state = GRPC_CHANNEL_IDLE;
   grpc_closure_init(&chand->channel_connectivity_changed,
                     channel_connectivity_changed, chand);
+  return GRPC_ERROR_NONE;
 }
 
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
@@ -965,6 +967,7 @@ const grpc_channel_filter grpc_server_top_filter = {
     init_channel_elem,
     destroy_channel_elem,
     grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
     "server",
 };
 
@@ -1084,7 +1087,7 @@ void grpc_server_start(grpc_server *server) {
   GRPC_API_TRACE("grpc_server_start(server=%p)", 1, (server));
 
   server->started = true;
-  size_t pollset_count = 0;
+  server->pollset_count = 0;
   server->pollsets = gpr_malloc(sizeof(grpc_pollset *) * server->cq_count);
   server->request_freelist_per_cq =
       gpr_malloc(sizeof(*server->request_freelist_per_cq) * server->cq_count);
@@ -1092,7 +1095,8 @@ void grpc_server_start(grpc_server *server) {
       gpr_malloc(sizeof(*server->requested_calls_per_cq) * server->cq_count);
   for (i = 0; i < server->cq_count; i++) {
     if (!grpc_cq_is_non_listening_server_cq(server->cqs[i])) {
-      server->pollsets[pollset_count++] = grpc_cq_pollset(server->cqs[i]);
+      server->pollsets[server->pollset_count++] =
+          grpc_cq_pollset(server->cqs[i]);
     }
     server->request_freelist_per_cq[i] =
         gpr_stack_lockfree_create((size_t)server->max_requested_calls_per_cq);
@@ -1111,7 +1115,8 @@ void grpc_server_start(grpc_server *server) {
   }
 
   for (l = server->listeners; l; l = l->next) {
-    l->start(&exec_ctx, server, l->arg, server->pollsets, pollset_count);
+    l->start(&exec_ctx, server, l->arg, server->pollsets,
+             server->pollset_count);
   }
 
   grpc_exec_ctx_finish(&exec_ctx);
@@ -1119,7 +1124,7 @@ void grpc_server_start(grpc_server *server) {
 
 void grpc_server_get_pollsets(grpc_server *server, grpc_pollset ***pollsets,
                               size_t *pollset_count) {
-  *pollset_count = server->cq_count;
+  *pollset_count = server->pollset_count;
   *pollsets = server->pollsets;
 }
 
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index 41242684da..0db8b41aa9 100644
--- a/src/core/lib/surface/version.c
+++ b/src/core/lib/surface/version.c
@@ -36,6 +36,6 @@
 
 #include <grpc/grpc.h>
 
-const char *grpc_version_string(void) { return "1.1.0-dev"; }
+const char *grpc_version_string(void) { return "2.0.0-dev"; }
 
 const char *grpc_g_stands_for(void) { return "good"; }
diff --git a/src/core/lib/transport/byte_stream.c b/src/core/lib/transport/byte_stream.c
index 2f6c75cb6a..2f1d7b7c60 100644
--- a/src/core/lib/transport/byte_stream.c
+++ b/src/core/lib/transport/byte_stream.c
@@ -38,7 +38,7 @@
 #include <grpc/support/log.h>
 
 int grpc_byte_stream_next(grpc_exec_ctx *exec_ctx,
-                          grpc_byte_stream *byte_stream, gpr_slice *slice,
+                          grpc_byte_stream *byte_stream, grpc_slice *slice,
                           size_t max_size_hint, grpc_closure *on_complete) {
   return byte_stream->next(exec_ctx, byte_stream, slice, max_size_hint,
                            on_complete);
@@ -53,11 +53,11 @@ void grpc_byte_stream_destroy(grpc_exec_ctx *exec_ctx,
 
 static int slice_buffer_stream_next(grpc_exec_ctx *exec_ctx,
                                     grpc_byte_stream *byte_stream,
-                                    gpr_slice *slice, size_t max_size_hint,
+                                    grpc_slice *slice, size_t max_size_hint,
                                     grpc_closure *on_complete) {
   grpc_slice_buffer_stream *stream = (grpc_slice_buffer_stream *)byte_stream;
   GPR_ASSERT(stream->cursor < stream->backing_buffer->count);
-  *slice = gpr_slice_ref(stream->backing_buffer->slices[stream->cursor]);
+  *slice = grpc_slice_ref(stream->backing_buffer->slices[stream->cursor]);
   stream->cursor++;
   return 1;
 }
@@ -66,7 +66,7 @@ static void slice_buffer_stream_destroy(grpc_exec_ctx *exec_ctx,
                                         grpc_byte_stream *byte_stream) {}
 
 void grpc_slice_buffer_stream_init(grpc_slice_buffer_stream *stream,
-                                   gpr_slice_buffer *slice_buffer,
+                                   grpc_slice_buffer *slice_buffer,
                                    uint32_t flags) {
   GPR_ASSERT(slice_buffer->length <= UINT32_MAX);
   stream->base.length = (uint32_t)slice_buffer->length;
diff --git a/src/core/lib/transport/byte_stream.h b/src/core/lib/transport/byte_stream.h
index e64dce6283..1fdd5b4d77 100644
--- a/src/core/lib/transport/byte_stream.h
+++ b/src/core/lib/transport/byte_stream.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_LIB_TRANSPORT_BYTE_STREAM_H
 #define GRPC_CORE_LIB_TRANSPORT_BYTE_STREAM_H
 
-#include <grpc/support/slice_buffer.h>
+#include <grpc/slice_buffer.h>
 #include "src/core/lib/iomgr/exec_ctx.h"
 
 /** Internal bit flag for grpc_begin_message's \a flags signaling the use of
@@ -50,7 +50,7 @@ struct grpc_byte_stream {
   uint32_t length;
   uint32_t flags;
   int (*next)(grpc_exec_ctx *exec_ctx, grpc_byte_stream *byte_stream,
-              gpr_slice *slice, size_t max_size_hint,
+              grpc_slice *slice, size_t max_size_hint,
               grpc_closure *on_complete);
   void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_byte_stream *byte_stream);
 };
@@ -65,7 +65,7 @@ struct grpc_byte_stream {
  * once a slice is returned into *slice, it is owned by the caller.
  */
 int grpc_byte_stream_next(grpc_exec_ctx *exec_ctx,
-                          grpc_byte_stream *byte_stream, gpr_slice *slice,
+                          grpc_byte_stream *byte_stream, grpc_slice *slice,
                           size_t max_size_hint, grpc_closure *on_complete);
 
 void grpc_byte_stream_destroy(grpc_exec_ctx *exec_ctx,
@@ -74,12 +74,12 @@ void grpc_byte_stream_destroy(grpc_exec_ctx *exec_ctx,
 /* grpc_byte_stream that wraps a slice buffer */
 typedef struct grpc_slice_buffer_stream {
   grpc_byte_stream base;
-  gpr_slice_buffer *backing_buffer;
+  grpc_slice_buffer *backing_buffer;
   size_t cursor;
 } grpc_slice_buffer_stream;
 
 void grpc_slice_buffer_stream_init(grpc_slice_buffer_stream *stream,
-                                   gpr_slice_buffer *slice_buffer,
+                                   grpc_slice_buffer *slice_buffer,
                                    uint32_t flags);
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_BYTE_STREAM_H */
diff --git a/src/core/lib/transport/connectivity_state.c b/src/core/lib/transport/connectivity_state.c
index fdb5307814..4f49d7cf7d 100644
--- a/src/core/lib/transport/connectivity_state.c
+++ b/src/core/lib/transport/connectivity_state.c
@@ -43,6 +43,8 @@ int grpc_connectivity_state_trace = 0;
 
 const char *grpc_connectivity_state_name(grpc_connectivity_state state) {
   switch (state) {
+    case GRPC_CHANNEL_INIT:
+      return "INIT";
     case GRPC_CHANNEL_IDLE:
       return "IDLE";
     case GRPC_CHANNEL_CONNECTING:
@@ -98,7 +100,12 @@ grpc_connectivity_state grpc_connectivity_state_check(
   return tracker->current_state;
 }
 
-int grpc_connectivity_state_notify_on_state_change(
+bool grpc_connectivity_state_has_watchers(
+    grpc_connectivity_state_tracker *connectivity_state) {
+  return connectivity_state->watchers != NULL;
+}
+
+bool grpc_connectivity_state_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
     grpc_connectivity_state *current, grpc_closure *notify) {
   if (grpc_connectivity_state_trace) {
@@ -117,7 +124,7 @@ int grpc_connectivity_state_notify_on_state_change(
       grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_CANCELLED, NULL);
       tracker->watchers = w->next;
       gpr_free(w);
-      return 0;
+      return false;
     }
     while (w != NULL) {
       grpc_connectivity_state_watcher *rm_candidate = w->next;
@@ -125,11 +132,11 @@ int grpc_connectivity_state_notify_on_state_change(
         grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_CANCELLED, NULL);
         w->next = w->next->next;
         gpr_free(rm_candidate);
-        return 0;
+        return false;
       }
       w = w->next;
     }
-    return 0;
+    return false;
   } else {
     if (tracker->current_state != *current) {
       *current = tracker->current_state;
@@ -159,6 +166,7 @@ void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
     grpc_error_free_string(error_string);
   }
   switch (state) {
+    case GRPC_CHANNEL_INIT:
     case GRPC_CHANNEL_CONNECTING:
     case GRPC_CHANNEL_IDLE:
     case GRPC_CHANNEL_READY:
diff --git a/src/core/lib/transport/connectivity_state.h b/src/core/lib/transport/connectivity_state.h
index 7a2fa52c10..769c675b79 100644
--- a/src/core/lib/transport/connectivity_state.h
+++ b/src/core/lib/transport/connectivity_state.h
@@ -75,13 +75,16 @@ void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
                                  grpc_error *associated_error,
                                  const char *reason);
 
+bool grpc_connectivity_state_has_watchers(
+    grpc_connectivity_state_tracker *tracker);
+
 grpc_connectivity_state grpc_connectivity_state_check(
     grpc_connectivity_state_tracker *tracker, grpc_error **current_error);
 
 /** Return 1 if the channel should start connecting, 0 otherwise.
     If current==NULL cancel notify if it is already queued (success==0 in that
     case) */
-int grpc_connectivity_state_notify_on_state_change(
+bool grpc_connectivity_state_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
     grpc_connectivity_state *current, grpc_closure *notify);
 
diff --git a/src/core/lib/transport/mdstr_hash_table.c b/src/core/lib/transport/mdstr_hash_table.c
index 8e914c420b..3d01e56df7 100644
--- a/src/core/lib/transport/mdstr_hash_table.c
+++ b/src/core/lib/transport/mdstr_hash_table.c
@@ -41,7 +41,6 @@
 
 struct grpc_mdstr_hash_table {
   gpr_refcount refs;
-  size_t num_entries;
   size_t size;
   grpc_mdstr_hash_table_entry* entries;
 };
@@ -77,7 +76,6 @@ grpc_mdstr_hash_table* grpc_mdstr_hash_table_create(
   grpc_mdstr_hash_table* table = gpr_malloc(sizeof(*table));
   memset(table, 0, sizeof(*table));
   gpr_ref_init(&table->refs, 1);
-  table->num_entries = num_entries;
   // Quadratic probing gets best performance when the table is no more
   // than half full.
   table->size = num_entries * 2;
@@ -96,7 +94,7 @@ grpc_mdstr_hash_table* grpc_mdstr_hash_table_ref(grpc_mdstr_hash_table* table) {
   return table;
 }
 
-int grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table) {
+void grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table) {
   if (table != NULL && gpr_unref(&table->refs)) {
     for (size_t i = 0; i < table->size; ++i) {
       grpc_mdstr_hash_table_entry* entry = &table->entries[i];
@@ -107,13 +105,7 @@ int grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table) {
     }
     gpr_free(table->entries);
     gpr_free(table);
-    return 1;
   }
-  return 0;
-}
-
-size_t grpc_mdstr_hash_table_num_entries(const grpc_mdstr_hash_table* table) {
-  return table->num_entries;
 }
 
 void* grpc_mdstr_hash_table_get(const grpc_mdstr_hash_table* table,
@@ -123,35 +115,3 @@ void* grpc_mdstr_hash_table_get(const grpc_mdstr_hash_table* table,
   if (idx == table->size) return NULL;  // Not found.
   return table->entries[idx].value;
 }
-
-int grpc_mdstr_hash_table_cmp(const grpc_mdstr_hash_table* table1,
-                              const grpc_mdstr_hash_table* table2) {
-  // Compare by num_entries.
-  if (table1->num_entries < table2->num_entries) return -1;
-  if (table1->num_entries > table2->num_entries) return 1;
-  for (size_t i = 0; i < table1->num_entries; ++i) {
-    grpc_mdstr_hash_table_entry* e1 = &table1->entries[i];
-    grpc_mdstr_hash_table_entry* e2 = &table2->entries[i];
-    // Compare keys by hash value.
-    if (e1->key->hash < e2->key->hash) return -1;
-    if (e1->key->hash > e2->key->hash) return 1;
-    // Compare by vtable (pointer equality).
-    if (e1->vtable < e2->vtable) return -1;
-    if (e1->vtable > e2->vtable) return 1;
-    // Compare values via vtable.
-    const int value_result = e1->vtable->compare_value(e1->value, e2->value);
-    if (value_result != 0) return value_result;
-  }
-  return 0;
-}
-
-void grpc_mdstr_hash_table_iterate(
-    const grpc_mdstr_hash_table* table,
-    void (*func)(const grpc_mdstr_hash_table_entry* entry, void* user_data),
-    void* user_data) {
-  for (size_t i = 0; i < table->size; ++i) {
-    if (table->entries[i].key != NULL) {
-      func(&table->entries[i], user_data);
-    }
-  }
-}
diff --git a/src/core/lib/transport/mdstr_hash_table.h b/src/core/lib/transport/mdstr_hash_table.h
index bceb4df93d..8982ec3a8d 100644
--- a/src/core/lib/transport/mdstr_hash_table.h
+++ b/src/core/lib/transport/mdstr_hash_table.h
@@ -51,7 +51,6 @@ typedef struct grpc_mdstr_hash_table grpc_mdstr_hash_table;
 typedef struct grpc_mdstr_hash_table_vtable {
   void (*destroy_value)(void* value);
   void* (*copy_value)(void* value);
-  int (*compare_value)(void* value1, void* value2);
 } grpc_mdstr_hash_table_vtable;
 
 typedef struct grpc_mdstr_hash_table_entry {
@@ -67,26 +66,11 @@ grpc_mdstr_hash_table* grpc_mdstr_hash_table_create(
     size_t num_entries, grpc_mdstr_hash_table_entry* entries);
 
 grpc_mdstr_hash_table* grpc_mdstr_hash_table_ref(grpc_mdstr_hash_table* table);
-/** Returns 1 when \a table is destroyed. */
-int grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table);
-
-/** Returns the number of entries in \a table. */
-size_t grpc_mdstr_hash_table_num_entries(const grpc_mdstr_hash_table* table);
+void grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table);
 
 /** Returns the value from \a table associated with \a key.
     Returns NULL if \a key is not found. */
 void* grpc_mdstr_hash_table_get(const grpc_mdstr_hash_table* table,
                                 const grpc_mdstr* key);
 
-/** Compares two hash tables.
-    The sort order is stable but undefined. */
-int grpc_mdstr_hash_table_cmp(const grpc_mdstr_hash_table* table1,
-                              const grpc_mdstr_hash_table* table2);
-
-/** Iterates over the entries in \a table, calling \a func for each entry. */
-void grpc_mdstr_hash_table_iterate(
-    const grpc_mdstr_hash_table* table,
-    void (*func)(const grpc_mdstr_hash_table_entry* entry, void* user_data),
-    void* user_data);
-
 #endif /* GRPC_CORE_LIB_TRANSPORT_MDSTR_HASH_TABLE_H */
diff --git a/src/core/lib/transport/metadata.c b/src/core/lib/transport/metadata.c
index 4b40c275ad..fac19b91d9 100644
--- a/src/core/lib/transport/metadata.c
+++ b/src/core/lib/transport/metadata.c
@@ -51,7 +51,7 @@
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/static_metadata.h"
 
-gpr_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(gpr_slice input);
+grpc_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(grpc_slice input);
 
 /* There are two kinds of mdelem and mdstr instances.
  * Static instances are declared in static_metadata.{h,c} and
@@ -85,16 +85,16 @@ typedef void (*destroy_user_data_func)(void *user_data);
 /* Shadow structure for grpc_mdstr for non-static values */
 typedef struct internal_string {
   /* must be byte compatible with grpc_mdstr */
-  gpr_slice slice;
+  grpc_slice slice;
   uint32_t hash;
 
   /* private only data */
   gpr_atm refcnt;
 
   uint8_t has_base64_and_huffman_encoded;
-  gpr_slice_refcount refcount;
+  grpc_slice_refcount refcount;
 
-  gpr_slice base64_and_huffman;
+  grpc_slice base64_and_huffman;
 
   gpr_atm size_in_decoder_table;
 
@@ -174,7 +174,7 @@ void grpc_mdctx_global_init(void) {
     grpc_mdstr *elem = &grpc_static_mdstr_table[i];
     const char *str = grpc_static_metadata_strings[i];
     uint32_t hash = gpr_murmur_hash3(str, strlen(str), g_hash_seed);
-    *(gpr_slice *)&elem->slice = gpr_slice_from_static_string(str);
+    *(grpc_slice *)&elem->slice = grpc_slice_from_static_string(str);
     *(uint32_t *)&elem->hash = hash;
     for (j = 0;; j++) {
       size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_strtab);
@@ -321,7 +321,7 @@ static void internal_destroy_string(strtab_shard *shard, internal_string *is) {
   internal_string *cur;
   GPR_TIMER_BEGIN("internal_destroy_string", 0);
   if (is->has_base64_and_huffman_encoded) {
-    gpr_slice_unref(is->base64_and_huffman);
+    grpc_slice_unref(is->base64_and_huffman);
   }
   for (prev_next = &shard->strs[TABLE_IDX(is->hash, LOG2_STRTAB_SHARD_COUNT,
                                           shard->capacity)],
@@ -350,10 +350,10 @@ grpc_mdstr *grpc_mdstr_from_string(const char *str) {
   return grpc_mdstr_from_buffer((const uint8_t *)str, strlen(str));
 }
 
-grpc_mdstr *grpc_mdstr_from_slice(gpr_slice slice) {
-  grpc_mdstr *result = grpc_mdstr_from_buffer(GPR_SLICE_START_PTR(slice),
-                                              GPR_SLICE_LENGTH(slice));
-  gpr_slice_unref(slice);
+grpc_mdstr *grpc_mdstr_from_slice(grpc_slice slice) {
+  grpc_mdstr *result = grpc_mdstr_from_buffer(GRPC_SLICE_START_PTR(slice),
+                                              GRPC_SLICE_LENGTH(slice));
+  grpc_slice_unref(slice);
   return result;
 }
 
@@ -373,9 +373,9 @@ grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) {
     idx = (hash + i) % GPR_ARRAY_SIZE(g_static_strtab);
     ss = g_static_strtab[idx];
     if (ss == NULL) break;
-    if (ss->hash == hash && GPR_SLICE_LENGTH(ss->slice) == length &&
+    if (ss->hash == hash && GRPC_SLICE_LENGTH(ss->slice) == length &&
         (length == 0 ||
-         0 == memcmp(buf, GPR_SLICE_START_PTR(ss->slice), length))) {
+         0 == memcmp(buf, GRPC_SLICE_START_PTR(ss->slice), length))) {
       GPR_TIMER_END("grpc_mdstr_from_buffer", 0);
       return ss;
     }
@@ -386,8 +386,8 @@ grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) {
   /* search for an existing string */
   idx = TABLE_IDX(hash, LOG2_STRTAB_SHARD_COUNT, shard->capacity);
   for (s = shard->strs[idx]; s; s = s->bucket_next) {
-    if (s->hash == hash && GPR_SLICE_LENGTH(s->slice) == length &&
-        0 == memcmp(buf, GPR_SLICE_START_PTR(s->slice), length)) {
+    if (s->hash == hash && GRPC_SLICE_LENGTH(s->slice) == length &&
+        0 == memcmp(buf, GRPC_SLICE_START_PTR(s->slice), length)) {
       if (gpr_atm_full_fetch_add(&s->refcnt, 1) == 0) {
         /* If we get here, we've added a ref to something that was about to
          * die - drop it immediately.
@@ -404,7 +404,7 @@ grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) {
   }
 
   /* not found: create a new string */
-  if (length + 1 < GPR_SLICE_INLINED_SIZE) {
+  if (length + 1 < GRPC_SLICE_INLINED_SIZE) {
     /* string data goes directly into the slice */
     s = gpr_malloc(sizeof(internal_string));
     gpr_atm_rel_store(&s->refcnt, 1);
@@ -589,7 +589,7 @@ grpc_mdelem *grpc_mdelem_from_strings(const char *key, const char *value) {
                                            grpc_mdstr_from_string(value));
 }
 
-grpc_mdelem *grpc_mdelem_from_slices(gpr_slice key, gpr_slice value) {
+grpc_mdelem *grpc_mdelem_from_slices(grpc_slice key, grpc_slice value) {
   return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_slice(key),
                                            grpc_mdstr_from_slice(value));
 }
@@ -607,12 +607,12 @@ static size_t get_base64_encoded_size(size_t raw_length) {
 }
 
 size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem) {
-  size_t overhead_and_key = 32 + GPR_SLICE_LENGTH(elem->key->slice);
-  size_t value_len = GPR_SLICE_LENGTH(elem->value->slice);
+  size_t overhead_and_key = 32 + GRPC_SLICE_LENGTH(elem->key->slice);
+  size_t value_len = GRPC_SLICE_LENGTH(elem->value->slice);
   if (is_mdstr_static(elem->value)) {
     if (grpc_is_binary_header(
-            (const char *)GPR_SLICE_START_PTR(elem->key->slice),
-            GPR_SLICE_LENGTH(elem->key->slice))) {
+            (const char *)GRPC_SLICE_START_PTR(elem->key->slice),
+            GRPC_SLICE_LENGTH(elem->key->slice))) {
       return overhead_and_key + get_base64_encoded_size(value_len);
     } else {
       return overhead_and_key + value_len;
@@ -622,8 +622,8 @@ size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem) {
     gpr_atm current_size = gpr_atm_acq_load(&is->size_in_decoder_table);
     if (current_size == SIZE_IN_DECODER_TABLE_NOT_SET) {
       if (grpc_is_binary_header(
-              (const char *)GPR_SLICE_START_PTR(elem->key->slice),
-              GPR_SLICE_LENGTH(elem->key->slice))) {
+              (const char *)GRPC_SLICE_START_PTR(elem->key->slice),
+              GRPC_SLICE_LENGTH(elem->key->slice))) {
         current_size = (gpr_atm)get_base64_encoded_size(value_len);
       } else {
         current_size = (gpr_atm)value_len;
@@ -679,7 +679,7 @@ void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) {
 }
 
 const char *grpc_mdstr_as_c_string(const grpc_mdstr *s) {
-  return (const char *)GPR_SLICE_START_PTR(s->slice);
+  return (const char *)GRPC_SLICE_START_PTR(s->slice);
 }
 
 size_t grpc_mdstr_length(const grpc_mdstr *s) { return GRPC_MDSTR_LENGTH(s); }
@@ -687,6 +687,11 @@ size_t grpc_mdstr_length(const grpc_mdstr *s) { return GRPC_MDSTR_LENGTH(s); }
 grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) {
   internal_string *s = (internal_string *)gs;
   if (is_mdstr_static(gs)) return gs;
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR   REF:%p:%zu->%zu: '%s'",
+          (void *)s, gpr_atm_no_barrier_load(&s->refcnt),
+          gpr_atm_no_barrier_load(&s->refcnt) + 1, grpc_mdstr_as_c_string(gs));
+#endif
   GPR_ASSERT(gpr_atm_full_fetch_add(&s->refcnt, 1) > 0);
   return gs;
 }
@@ -694,6 +699,11 @@ grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) {
 void grpc_mdstr_unref(grpc_mdstr *gs DEBUG_ARGS) {
   internal_string *s = (internal_string *)gs;
   if (is_mdstr_static(gs)) return;
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR UNREF:%p:%zu->%zu: '%s'",
+          (void *)s, gpr_atm_no_barrier_load(&s->refcnt),
+          gpr_atm_no_barrier_load(&s->refcnt) - 1, grpc_mdstr_as_c_string(gs));
+#endif
   if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) {
     strtab_shard *shard =
         &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)];
@@ -718,8 +728,8 @@ void *grpc_mdelem_get_user_data(grpc_mdelem *md, void (*destroy_func)(void *)) {
   return result;
 }
 
-void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
-                               void *user_data) {
+void *grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
+                                void *user_data) {
   internal_metadata *im = (internal_metadata *)md;
   GPR_ASSERT(!is_mdelem_static(md));
   GPR_ASSERT((user_data == NULL) == (destroy_func == NULL));
@@ -730,16 +740,17 @@ void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
     if (destroy_func != NULL) {
       destroy_func(user_data);
     }
-    return;
+    return (void *)gpr_atm_no_barrier_load(&im->user_data);
   }
   gpr_atm_no_barrier_store(&im->user_data, (gpr_atm)user_data);
   gpr_atm_rel_store(&im->destroy_user_data, (gpr_atm)destroy_func);
   gpr_mu_unlock(&im->mu_user_data);
+  return user_data;
 }
 
-gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) {
+grpc_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) {
   internal_string *s = (internal_string *)gs;
-  gpr_slice slice;
+  grpc_slice slice;
   strtab_shard *shard =
       &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)];
   gpr_mu_lock(&shard->mu);
diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index 71eff0acf2..a4955a1ea7 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_CORE_LIB_TRANSPORT_METADATA_H
 #define GRPC_CORE_LIB_TRANSPORT_METADATA_H
 
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include <grpc/support/useful.h>
 
 #ifdef __cplusplus
@@ -77,7 +77,7 @@ typedef struct grpc_mdelem grpc_mdelem;
 
 /* if changing this, make identical changes in internal_string in metadata.c */
 struct grpc_mdstr {
-  const gpr_slice slice;
+  const grpc_slice slice;
   const uint32_t hash;
   /* there is a private part to this in metadata.c */
 };
@@ -96,12 +96,12 @@ void grpc_test_only_set_metadata_hash_seed(uint32_t seed);
    clients may have handy */
 grpc_mdstr *grpc_mdstr_from_string(const char *str);
 /* Unrefs the slice. */
-grpc_mdstr *grpc_mdstr_from_slice(gpr_slice slice);
+grpc_mdstr *grpc_mdstr_from_slice(grpc_slice slice);
 grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *str, size_t length);
 
 /* Returns a borrowed slice from the mdstr with its contents base64 encoded
    and huffman compressed */
-gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *str);
+grpc_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *str);
 
 /* Constructors for grpc_mdelem instances; take a variety of data types that
    clients may have handy */
@@ -109,7 +109,7 @@ grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdstr *key,
                                                grpc_mdstr *value);
 grpc_mdelem *grpc_mdelem_from_strings(const char *key, const char *value);
 /* Unrefs the slices. */
-grpc_mdelem *grpc_mdelem_from_slices(gpr_slice key, gpr_slice value);
+grpc_mdelem *grpc_mdelem_from_slices(grpc_slice key, grpc_slice value);
 grpc_mdelem *grpc_mdelem_from_string_and_buffer(const char *key,
                                                 const uint8_t *value,
                                                 size_t value_length);
@@ -120,8 +120,8 @@ size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem);
    is used as a type tag and is checked during user_data fetch. */
 void *grpc_mdelem_get_user_data(grpc_mdelem *md,
                                 void (*if_destroy_func)(void *));
-void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
-                               void *user_data);
+void *grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
+                                void *user_data);
 
 /* Reference counting */
 //#define GRPC_METADATA_REFCOUNT_DEBUG
@@ -149,7 +149,7 @@ void grpc_mdelem_unref(grpc_mdelem *md);
    Does not promise that the returned string has no embedded nulls however. */
 const char *grpc_mdstr_as_c_string(const grpc_mdstr *s);
 
-#define GRPC_MDSTR_LENGTH(s) (GPR_SLICE_LENGTH(s->slice))
+#define GRPC_MDSTR_LENGTH(s) (GRPC_SLICE_LENGTH(s->slice))
 
 /* We add 32 bytes of padding as per RFC-7540 section 6.5.2. */
 #define GRPC_MDELEM_LENGTH(e) \
@@ -165,8 +165,8 @@ void grpc_mdctx_global_init(void);
 void grpc_mdctx_global_shutdown(void);
 
 /* Implementation provided by chttp2_transport */
-extern gpr_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(
-    gpr_slice input);
+extern grpc_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(
+    grpc_slice input);
 
 #ifdef __cplusplus
 }
diff --git a/src/core/lib/transport/metadata_batch.h b/src/core/lib/transport/metadata_batch.h
index 0424b4db98..7a9ccb4bc8 100644
--- a/src/core/lib/transport/metadata_batch.h
+++ b/src/core/lib/transport/metadata_batch.h
@@ -37,8 +37,8 @@
 #include <stdbool.h>
 
 #include <grpc/grpc.h>
+#include <grpc/slice.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
 #include <grpc/support/time.h>
 #include "src/core/lib/transport/metadata.h"
 
diff --git a/src/core/lib/transport/method_config.c b/src/core/lib/transport/method_config.c
deleted file mode 100644
index 57d97700bf..0000000000
--- a/src/core/lib/transport/method_config.c
+++ /dev/null
@@ -1,340 +0,0 @@
-//
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-
-#include "src/core/lib/transport/method_config.h"
-
-#include <string.h>
-
-#include <grpc/impl/codegen/grpc_types.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/time.h>
-
-#include "src/core/lib/transport/mdstr_hash_table.h"
-#include "src/core/lib/transport/metadata.h"
-
-//
-// grpc_method_config
-//
-
-// bool vtable
-
-static void* bool_copy(void* valuep) {
-  bool value = *(bool*)valuep;
-  bool* new_value = gpr_malloc(sizeof(bool));
-  *new_value = value;
-  return new_value;
-}
-
-static int bool_cmp(void* v1, void* v2) {
-  bool b1 = *(bool*)v1;
-  bool b2 = *(bool*)v2;
-  if (!b1 && b2) return -1;
-  if (b1 && !b2) return 1;
-  return 0;
-}
-
-static grpc_mdstr_hash_table_vtable bool_vtable = {gpr_free, bool_copy,
-                                                   bool_cmp};
-
-// timespec vtable
-
-static void* timespec_copy(void* valuep) {
-  gpr_timespec value = *(gpr_timespec*)valuep;
-  gpr_timespec* new_value = gpr_malloc(sizeof(gpr_timespec));
-  *new_value = value;
-  return new_value;
-}
-
-static int timespec_cmp(void* v1, void* v2) {
-  return gpr_time_cmp(*(gpr_timespec*)v1, *(gpr_timespec*)v2);
-}
-
-static grpc_mdstr_hash_table_vtable timespec_vtable = {gpr_free, timespec_copy,
-                                                       timespec_cmp};
-
-// int32 vtable
-
-static void* int32_copy(void* valuep) {
-  int32_t value = *(int32_t*)valuep;
-  int32_t* new_value = gpr_malloc(sizeof(int32_t));
-  *new_value = value;
-  return new_value;
-}
-
-static int int32_cmp(void* v1, void* v2) {
-  int32_t i1 = *(int32_t*)v1;
-  int32_t i2 = *(int32_t*)v2;
-  if (i1 < i2) return -1;
-  if (i1 > i2) return 1;
-  return 0;
-}
-
-static grpc_mdstr_hash_table_vtable int32_vtable = {gpr_free, int32_copy,
-                                                    int32_cmp};
-
-// Hash table keys.
-#define GRPC_METHOD_CONFIG_WAIT_FOR_READY "grpc.wait_for_ready"  // bool
-#define GRPC_METHOD_CONFIG_TIMEOUT "grpc.timeout"                // gpr_timespec
-#define GRPC_METHOD_CONFIG_MAX_REQUEST_MESSAGE_BYTES \
-  "grpc.max_request_message_bytes"  // int32
-#define GRPC_METHOD_CONFIG_MAX_RESPONSE_MESSAGE_BYTES \
-  "grpc.max_response_message_bytes"  // int32
-
-struct grpc_method_config {
-  grpc_mdstr_hash_table* table;
-  grpc_mdstr* wait_for_ready_key;
-  grpc_mdstr* timeout_key;
-  grpc_mdstr* max_request_message_bytes_key;
-  grpc_mdstr* max_response_message_bytes_key;
-};
-
-grpc_method_config* grpc_method_config_create(
-    bool* wait_for_ready, gpr_timespec* timeout,
-    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes) {
-  grpc_method_config* method_config = gpr_malloc(sizeof(grpc_method_config));
-  memset(method_config, 0, sizeof(grpc_method_config));
-  method_config->wait_for_ready_key =
-      grpc_mdstr_from_string(GRPC_METHOD_CONFIG_WAIT_FOR_READY);
-  method_config->timeout_key =
-      grpc_mdstr_from_string(GRPC_METHOD_CONFIG_TIMEOUT);
-  method_config->max_request_message_bytes_key =
-      grpc_mdstr_from_string(GRPC_METHOD_CONFIG_MAX_REQUEST_MESSAGE_BYTES);
-  method_config->max_response_message_bytes_key =
-      grpc_mdstr_from_string(GRPC_METHOD_CONFIG_MAX_RESPONSE_MESSAGE_BYTES);
-  grpc_mdstr_hash_table_entry entries[4];
-  size_t num_entries = 0;
-  if (wait_for_ready != NULL) {
-    entries[num_entries].key = method_config->wait_for_ready_key;
-    entries[num_entries].value = wait_for_ready;
-    entries[num_entries].vtable = &bool_vtable;
-    ++num_entries;
-  }
-  if (timeout != NULL) {
-    entries[num_entries].key = method_config->timeout_key;
-    entries[num_entries].value = timeout;
-    entries[num_entries].vtable = &timespec_vtable;
-    ++num_entries;
-  }
-  if (max_request_message_bytes != NULL) {
-    entries[num_entries].key = method_config->max_request_message_bytes_key;
-    entries[num_entries].value = max_request_message_bytes;
-    entries[num_entries].vtable = &int32_vtable;
-    ++num_entries;
-  }
-  if (max_response_message_bytes != NULL) {
-    entries[num_entries].key = method_config->max_response_message_bytes_key;
-    entries[num_entries].value = max_response_message_bytes;
-    entries[num_entries].vtable = &int32_vtable;
-    ++num_entries;
-  }
-  method_config->table = grpc_mdstr_hash_table_create(num_entries, entries);
-  return method_config;
-}
-
-grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config) {
-  grpc_mdstr_hash_table_ref(method_config->table);
-  return method_config;
-}
-
-void grpc_method_config_unref(grpc_method_config* method_config) {
-  if (grpc_mdstr_hash_table_unref(method_config->table)) {
-    GRPC_MDSTR_UNREF(method_config->wait_for_ready_key);
-    GRPC_MDSTR_UNREF(method_config->timeout_key);
-    GRPC_MDSTR_UNREF(method_config->max_request_message_bytes_key);
-    GRPC_MDSTR_UNREF(method_config->max_response_message_bytes_key);
-    gpr_free(method_config);
-  }
-}
-
-int grpc_method_config_cmp(const grpc_method_config* method_config1,
-                           const grpc_method_config* method_config2) {
-  return grpc_mdstr_hash_table_cmp(method_config1->table,
-                                   method_config2->table);
-}
-
-const bool* grpc_method_config_get_wait_for_ready(
-    const grpc_method_config* method_config) {
-  return grpc_mdstr_hash_table_get(method_config->table,
-                                   method_config->wait_for_ready_key);
-}
-
-const gpr_timespec* grpc_method_config_get_timeout(
-    const grpc_method_config* method_config) {
-  return grpc_mdstr_hash_table_get(method_config->table,
-                                   method_config->timeout_key);
-}
-
-const int32_t* grpc_method_config_get_max_request_message_bytes(
-    const grpc_method_config* method_config) {
-  return grpc_mdstr_hash_table_get(
-      method_config->table, method_config->max_request_message_bytes_key);
-}
-
-const int32_t* grpc_method_config_get_max_response_message_bytes(
-    const grpc_method_config* method_config) {
-  return grpc_mdstr_hash_table_get(
-      method_config->table, method_config->max_response_message_bytes_key);
-}
-
-//
-// grpc_method_config_table
-//
-
-static void method_config_unref(void* valuep) {
-  grpc_method_config_unref(valuep);
-}
-
-static void* method_config_ref(void* valuep) {
-  return grpc_method_config_ref(valuep);
-}
-
-static int method_config_cmp(void* valuep1, void* valuep2) {
-  return grpc_method_config_cmp(valuep1, valuep2);
-}
-
-static const grpc_mdstr_hash_table_vtable method_config_table_vtable = {
-    method_config_unref, method_config_ref, method_config_cmp};
-
-grpc_method_config_table* grpc_method_config_table_create(
-    size_t num_entries, grpc_method_config_table_entry* entries) {
-  grpc_mdstr_hash_table_entry* hash_table_entries =
-      gpr_malloc(sizeof(grpc_mdstr_hash_table_entry) * num_entries);
-  for (size_t i = 0; i < num_entries; ++i) {
-    hash_table_entries[i].key = entries[i].method_name;
-    hash_table_entries[i].value = entries[i].method_config;
-    hash_table_entries[i].vtable = &method_config_table_vtable;
-  }
-  grpc_method_config_table* method_config_table =
-      grpc_mdstr_hash_table_create(num_entries, hash_table_entries);
-  gpr_free(hash_table_entries);
-  return method_config_table;
-}
-
-grpc_method_config_table* grpc_method_config_table_ref(
-    grpc_method_config_table* table) {
-  return grpc_mdstr_hash_table_ref(table);
-}
-
-void grpc_method_config_table_unref(grpc_method_config_table* table) {
-  grpc_mdstr_hash_table_unref(table);
-}
-
-int grpc_method_config_table_cmp(const grpc_method_config_table* table1,
-                                 const grpc_method_config_table* table2) {
-  return grpc_mdstr_hash_table_cmp(table1, table2);
-}
-
-void* grpc_method_config_table_get(const grpc_mdstr_hash_table* table,
-                                   const grpc_mdstr* path) {
-  void* value = grpc_mdstr_hash_table_get(table, path);
-  // If we didn't find a match for the path, try looking for a wildcard
-  // entry (i.e., change "/service/method" to "/service/*").
-  if (value == NULL) {
-    const char* path_str = grpc_mdstr_as_c_string(path);
-    const char* sep = strrchr(path_str, '/') + 1;
-    const size_t len = (size_t)(sep - path_str);
-    char* buf = gpr_malloc(len + 2);  // '*' and NUL
-    memcpy(buf, path_str, len);
-    buf[len] = '*';
-    buf[len + 1] = '\0';
-    grpc_mdstr* wildcard_path = grpc_mdstr_from_string(buf);
-    gpr_free(buf);
-    value = grpc_mdstr_hash_table_get(table, wildcard_path);
-    GRPC_MDSTR_UNREF(wildcard_path);
-  }
-  return value;
-}
-
-static void* copy_arg(void* p) { return grpc_method_config_table_ref(p); }
-
-static void destroy_arg(void* p) { grpc_method_config_table_unref(p); }
-
-static int cmp_arg(void* p1, void* p2) {
-  return grpc_method_config_table_cmp(p1, p2);
-}
-
-static grpc_arg_pointer_vtable arg_vtable = {copy_arg, destroy_arg, cmp_arg};
-
-grpc_arg grpc_method_config_table_create_channel_arg(
-    grpc_method_config_table* table) {
-  grpc_arg arg;
-  arg.type = GRPC_ARG_POINTER;
-  arg.key = GRPC_ARG_SERVICE_CONFIG;
-  arg.value.pointer.p = table;
-  arg.value.pointer.vtable = &arg_vtable;
-  return arg;
-}
-
-// State used by convert_entry() below.
-typedef struct conversion_state {
-  void* (*convert_value)(const grpc_method_config* method_config);
-  const grpc_mdstr_hash_table_vtable* vtable;
-  size_t num_entries;
-  grpc_mdstr_hash_table_entry* entries;
-} conversion_state;
-
-// A function to be passed to grpc_mdstr_hash_table_iterate() to create
-// a copy of the entries.
-static void convert_entry(const grpc_mdstr_hash_table_entry* entry,
-                          void* user_data) {
-  conversion_state* state = user_data;
-  state->entries[state->num_entries].key = GRPC_MDSTR_REF(entry->key);
-  state->entries[state->num_entries].value = state->convert_value(entry->value);
-  state->entries[state->num_entries].vtable = state->vtable;
-  ++state->num_entries;
-}
-
-grpc_mdstr_hash_table* grpc_method_config_table_convert(
-    const grpc_method_config_table* table,
-    void* (*convert_value)(const grpc_method_config* method_config),
-    const grpc_mdstr_hash_table_vtable* vtable) {
-  // Create an array of the entries in the table with converted values.
-  conversion_state state;
-  state.convert_value = convert_value;
-  state.vtable = vtable;
-  state.num_entries = 0;
-  state.entries = gpr_malloc(sizeof(grpc_mdstr_hash_table_entry) *
-                             grpc_mdstr_hash_table_num_entries(table));
-  grpc_mdstr_hash_table_iterate(table, convert_entry, &state);
-  // Create a new table based on the array we just constructed.
-  grpc_mdstr_hash_table* new_table =
-      grpc_mdstr_hash_table_create(state.num_entries, state.entries);
-  // Clean up the array.
-  for (size_t i = 0; i < state.num_entries; ++i) {
-    GRPC_MDSTR_UNREF(state.entries[i].key);
-    vtable->destroy_value(state.entries[i].value);
-  }
-  gpr_free(state.entries);
-  // Return the new table.
-  return new_table;
-}
diff --git a/src/core/lib/transport/method_config.h b/src/core/lib/transport/method_config.h
deleted file mode 100644
index 58fedd9436..0000000000
--- a/src/core/lib/transport/method_config.h
+++ /dev/null
@@ -1,136 +0,0 @@
-//
-// Copyright 2016, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-
-#ifndef GRPC_CORE_LIB_TRANSPORT_METHOD_CONFIG_H
-#define GRPC_CORE_LIB_TRANSPORT_METHOD_CONFIG_H
-
-#include <stdbool.h>
-
-#include <grpc/impl/codegen/gpr_types.h>
-#include <grpc/impl/codegen/grpc_types.h>
-
-#include "src/core/lib/transport/mdstr_hash_table.h"
-#include "src/core/lib/transport/metadata.h"
-
-/// Per-method configuration.
-typedef struct grpc_method_config grpc_method_config;
-
-/// Creates a grpc_method_config with the specified parameters.
-/// Any parameter may be NULL to indicate that the value is unset.
-///
-/// \a wait_for_ready indicates whether the client should wait until the
-/// request deadline for the channel to become ready, even if there is a
-/// temporary failure before the deadline while attempting to connect.
-///
-/// \a timeout indicates the timeout for calls.
-///
-/// \a max_request_message_bytes and \a max_response_message_bytes
-/// indicate the maximum sizes of the request (checked when sending) and
-/// response (checked when receiving) messages.
-grpc_method_config* grpc_method_config_create(
-    bool* wait_for_ready, gpr_timespec* timeout,
-    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes);
-
-grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config);
-void grpc_method_config_unref(grpc_method_config* method_config);
-
-/// Compares two grpc_method_configs.
-/// The sort order is stable but undefined.
-int grpc_method_config_cmp(const grpc_method_config* method_config1,
-                           const grpc_method_config* method_config2);
-
-/// These methods return NULL if the requested field is unset.
-/// The caller does NOT take ownership of the result.
-const bool* grpc_method_config_get_wait_for_ready(
-    const grpc_method_config* method_config);
-const gpr_timespec* grpc_method_config_get_timeout(
-    const grpc_method_config* method_config);
-const int32_t* grpc_method_config_get_max_request_message_bytes(
-    const grpc_method_config* method_config);
-const int32_t* grpc_method_config_get_max_response_message_bytes(
-    const grpc_method_config* method_config);
-
-/// A table of method configs.
-typedef grpc_mdstr_hash_table grpc_method_config_table;
-
-typedef struct grpc_method_config_table_entry {
-  /// The name is of one of the following forms:
-  ///   service/method -- specifies exact service and method name
-  ///   service/*      -- matches all methods for the specified service
-  grpc_mdstr* method_name;
-  grpc_method_config* method_config;
-} grpc_method_config_table_entry;
-
-/// Takes new references to all keys and values in \a entries.
-grpc_method_config_table* grpc_method_config_table_create(
-    size_t num_entries, grpc_method_config_table_entry* entries);
-
-grpc_method_config_table* grpc_method_config_table_ref(
-    grpc_method_config_table* table);
-void grpc_method_config_table_unref(grpc_method_config_table* table);
-
-/// Compares two grpc_method_config_tables.
-/// The sort order is stable but undefined.
-int grpc_method_config_table_cmp(const grpc_method_config_table* table1,
-                                 const grpc_method_config_table* table2);
-
-/// Gets the method config for the specified \a path, which should be of
-/// the form "/service/method".
-/// Returns NULL if the method has no config.
-/// Caller does NOT own a reference to the result.
-///
-/// Note: This returns a void* instead of a grpc_method_config* so that
-/// it can also be used for tables constructed via
-/// grpc_method_config_table_convert().
-void* grpc_method_config_table_get(const grpc_mdstr_hash_table* table,
-                                   const grpc_mdstr* path);
-
-/// Returns a channel arg containing \a table.
-grpc_arg grpc_method_config_table_create_channel_arg(
-    grpc_method_config_table* table);
-
-/// Generates a new table from \a table whose values are converted to a
-/// new form via the \a convert_value function.  The new table will use
-/// \a vtable for its values.
-///
-/// This is generally used to convert the table's value type from
-/// grpc_method_config to a simple struct containing only the parameters
-/// relevant to a particular filter, thus avoiding the need for a hash
-/// table lookup on the fast path.  In that scenario, \a convert_value
-/// will return a new instance of the struct containing the values from
-/// the grpc_method_config, and \a vtable provides the methods for
-/// operating on the struct type.
-grpc_mdstr_hash_table* grpc_method_config_table_convert(
-    const grpc_method_config_table* table,
-    void* (*convert_value)(const grpc_method_config* method_config),
-    const grpc_mdstr_hash_table_vtable* vtable);
-
-#endif /* GRPC_CORE_LIB_TRANSPORT_METHOD_CONFIG_H */
diff --git a/src/core/lib/transport/pid_controller.c b/src/core/lib/transport/pid_controller.c
new file mode 100644
index 0000000000..3cef225d4b
--- /dev/null
+++ b/src/core/lib/transport/pid_controller.c
@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/transport/pid_controller.h"
+
+void grpc_pid_controller_init(grpc_pid_controller *pid_controller,
+                              double gain_p, double gain_i, double gain_d) {
+  pid_controller->gain_p = gain_p;
+  pid_controller->gain_i = gain_i;
+  pid_controller->gain_d = gain_d;
+  grpc_pid_controller_reset(pid_controller);
+}
+
+void grpc_pid_controller_reset(grpc_pid_controller *pid_controller) {
+  pid_controller->last_error = 0.0;
+  pid_controller->error_integral = 0.0;
+}
+
+double grpc_pid_controller_update(grpc_pid_controller *pid_controller,
+                                  double error, double dt) {
+  pid_controller->error_integral += error * dt;
+  double diff_error = (error - pid_controller->last_error) / dt;
+  pid_controller->last_error = error;
+  return dt * (pid_controller->gain_p * error +
+               pid_controller->gain_i * pid_controller->error_integral +
+               pid_controller->gain_d * diff_error);
+}
diff --git a/src/core/lib/transport/pid_controller.h b/src/core/lib/transport/pid_controller.h
new file mode 100644
index 0000000000..059b5b0834
--- /dev/null
+++ b/src/core/lib/transport/pid_controller.h
@@ -0,0 +1,64 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_TRANSPORT_PID_CONTROLLER_H
+#define GRPC_CORE_LIB_TRANSPORT_PID_CONTROLLER_H
+
+/* \file Simple PID controller.
+   Implements a proportional-integral-derivative controller.
+   Used when we want to iteratively control a variable to converge some other
+   observed value to a 'set-point'.
+   Gains can be set to adjust sensitivity to current error (p), the integral
+   of error (i), and the derivative of error (d). */
+
+typedef struct {
+  double gain_p;
+  double gain_i;
+  double gain_d;
+  double last_error;
+  double error_integral;
+} grpc_pid_controller;
+
+/** Initialize the controller */
+void grpc_pid_controller_init(grpc_pid_controller *pid_controller,
+                              double gain_p, double gain_i, double gain_d);
+
+/** Reset the controller: useful when things have changed significantly */
+void grpc_pid_controller_reset(grpc_pid_controller *pid_controller);
+
+/** Update the controller: given a current error estimate, and the time since
+    the last update, returns a delta to the control value */
+double grpc_pid_controller_update(grpc_pid_controller *pid_controller,
+                                  double error, double dt);
+
+#endif
diff --git a/src/core/lib/transport/service_config.c b/src/core/lib/transport/service_config.c
new file mode 100644
index 0000000000..2e2b59e3f7
--- /dev/null
+++ b/src/core/lib/transport/service_config.c
@@ -0,0 +1,249 @@
+//
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "src/core/lib/transport/service_config.h"
+
+#include <string.h>
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/json/json.h"
+#include "src/core/lib/support/string.h"
+#include "src/core/lib/transport/mdstr_hash_table.h"
+
+// The main purpose of the code here is to parse the service config in
+// JSON form, which will look like this:
+//
+// {
+//   "loadBalancingPolicy": "string",  // optional
+//   "methodConfig": [  // array of one or more method_config objects
+//     {
+//       "name": [  // array of one or more name objects
+//         {
+//           "service": "string",  // required
+//           "method": "string",  // optional
+//         }
+//       ],
+//       // remaining fields are optional.
+//       // see https://developers.google.com/protocol-buffers/docs/proto3#json
+//       // for format details.
+//       "waitForReady": bool,
+//       "timeout": "duration_string",
+//       "maxRequestMessageBytes": "int64_string",
+//       "maxResponseMessageBytes": "int64_string",
+//     }
+//   ]
+// }
+
+struct grpc_service_config {
+  char* json_string;  // Underlying storage for json_tree.
+  grpc_json* json_tree;
+};
+
+grpc_service_config* grpc_service_config_create(const char* json_string) {
+  grpc_service_config* service_config = gpr_malloc(sizeof(*service_config));
+  service_config->json_string = gpr_strdup(json_string);
+  service_config->json_tree =
+      grpc_json_parse_string(service_config->json_string);
+  if (service_config->json_tree == NULL) {
+    gpr_log(GPR_INFO, "failed to parse JSON for service config");
+    gpr_free(service_config->json_string);
+    gpr_free(service_config);
+    return NULL;
+  }
+  return service_config;
+}
+
+void grpc_service_config_destroy(grpc_service_config* service_config) {
+  grpc_json_destroy(service_config->json_tree);
+  gpr_free(service_config->json_string);
+  gpr_free(service_config);
+}
+
+const char* grpc_service_config_get_lb_policy_name(
+    const grpc_service_config* service_config) {
+  const grpc_json* json = service_config->json_tree;
+  if (json->type != GRPC_JSON_OBJECT || json->key != NULL) return NULL;
+  const char* lb_policy_name = NULL;
+  for (grpc_json* field = json->child; field != NULL; field = field->next) {
+    if (field->key == NULL) return NULL;
+    if (strcmp(field->key, "loadBalancingPolicy") == 0) {
+      if (lb_policy_name != NULL) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_STRING) return NULL;
+      lb_policy_name = field->value;
+    }
+  }
+  return lb_policy_name;
+}
+
+// Returns the number of names specified in the method config \a json.
+static size_t count_names_in_method_config_json(grpc_json* json) {
+  size_t num_names = 0;
+  for (grpc_json* field = json->child; field != NULL; field = field->next) {
+    if (field->key != NULL && strcmp(field->key, "name") == 0) ++num_names;
+  }
+  return num_names;
+}
+
+// Returns a path string for the JSON name object specified by \a json.
+// Returns NULL on error.  Caller takes ownership of result.
+static char* parse_json_method_name(grpc_json* json) {
+  if (json->type != GRPC_JSON_OBJECT) return NULL;
+  const char* service_name = NULL;
+  const char* method_name = NULL;
+  for (grpc_json* child = json->child; child != NULL; child = child->next) {
+    if (child->key == NULL) return NULL;
+    if (child->type != GRPC_JSON_STRING) return NULL;
+    if (strcmp(child->key, "service") == 0) {
+      if (service_name != NULL) return NULL;  // Duplicate.
+      if (child->value == NULL) return NULL;
+      service_name = child->value;
+    } else if (strcmp(child->key, "method") == 0) {
+      if (method_name != NULL) return NULL;  // Duplicate.
+      if (child->value == NULL) return NULL;
+      method_name = child->value;
+    }
+  }
+  if (service_name == NULL) return NULL;  // Required field.
+  char* path;
+  gpr_asprintf(&path, "/%s/%s", service_name,
+               method_name == NULL ? "*" : method_name);
+  return path;
+}
+
+// Parses the method config from \a json.  Adds an entry to \a entries for
+// each name found, incrementing \a idx for each entry added.
+// Returns false on error.
+static bool parse_json_method_config(
+    grpc_json* json, void* (*create_value)(const grpc_json* method_config_json),
+    const grpc_mdstr_hash_table_vtable* vtable,
+    grpc_mdstr_hash_table_entry* entries, size_t* idx) {
+  // Construct value.
+  void* method_config = create_value(json);
+  if (method_config == NULL) return false;
+  // Construct list of paths.
+  bool success = false;
+  gpr_strvec paths;
+  gpr_strvec_init(&paths);
+  for (grpc_json* child = json->child; child != NULL; child = child->next) {
+    if (child->key == NULL) continue;
+    if (strcmp(child->key, "name") == 0) {
+      if (child->type != GRPC_JSON_ARRAY) goto done;
+      for (grpc_json* name = child->child; name != NULL; name = name->next) {
+        char* path = parse_json_method_name(name);
+        gpr_strvec_add(&paths, path);
+      }
+    }
+  }
+  if (paths.count == 0) goto done;  // No names specified.
+  // Add entry for each path.
+  for (size_t i = 0; i < paths.count; ++i) {
+    entries[*idx].key = grpc_mdstr_from_string(paths.strs[i]);
+    entries[*idx].value = vtable->copy_value(method_config);
+    entries[*idx].vtable = vtable;
+    ++*idx;
+  }
+  success = true;
+done:
+  vtable->destroy_value(method_config);
+  gpr_strvec_destroy(&paths);
+  return success;
+}
+
+grpc_mdstr_hash_table* grpc_service_config_create_method_config_table(
+    const grpc_service_config* service_config,
+    void* (*create_value)(const grpc_json* method_config_json),
+    const grpc_mdstr_hash_table_vtable* vtable) {
+  const grpc_json* json = service_config->json_tree;
+  // Traverse parsed JSON tree.
+  if (json->type != GRPC_JSON_OBJECT || json->key != NULL) return NULL;
+  size_t num_entries = 0;
+  grpc_mdstr_hash_table_entry* entries = NULL;
+  for (grpc_json* field = json->child; field != NULL; field = field->next) {
+    if (field->key == NULL) return NULL;
+    if (strcmp(field->key, "methodConfig") == 0) {
+      if (entries != NULL) return NULL;  // Duplicate.
+      if (field->type != GRPC_JSON_ARRAY) return NULL;
+      // Find number of entries.
+      for (grpc_json* method = field->child; method != NULL;
+           method = method->next) {
+        num_entries += count_names_in_method_config_json(method);
+      }
+      // Populate method config table entries.
+      entries = gpr_malloc(num_entries * sizeof(grpc_mdstr_hash_table_entry));
+      size_t idx = 0;
+      for (grpc_json* method = field->child; method != NULL;
+           method = method->next) {
+        if (!parse_json_method_config(method, create_value, vtable, entries,
+                                      &idx)) {
+          return NULL;
+        }
+      }
+      GPR_ASSERT(idx == num_entries);
+    }
+  }
+  // Instantiate method config table.
+  grpc_mdstr_hash_table* method_config_table = NULL;
+  if (entries != NULL) {
+    method_config_table = grpc_mdstr_hash_table_create(num_entries, entries);
+    // Clean up.
+    for (size_t i = 0; i < num_entries; ++i) {
+      GRPC_MDSTR_UNREF(entries[i].key);
+      vtable->destroy_value(entries[i].value);
+    }
+    gpr_free(entries);
+  }
+  return method_config_table;
+}
+
+void* grpc_method_config_table_get(const grpc_mdstr_hash_table* table,
+                                   const grpc_mdstr* path) {
+  void* value = grpc_mdstr_hash_table_get(table, path);
+  // If we didn't find a match for the path, try looking for a wildcard
+  // entry (i.e., change "/service/method" to "/service/*").
+  if (value == NULL) {
+    const char* path_str = grpc_mdstr_as_c_string(path);
+    const char* sep = strrchr(path_str, '/') + 1;
+    const size_t len = (size_t)(sep - path_str);
+    char* buf = gpr_malloc(len + 2);  // '*' and NUL
+    memcpy(buf, path_str, len);
+    buf[len] = '*';
+    buf[len + 1] = '\0';
+    grpc_mdstr* wildcard_path = grpc_mdstr_from_string(buf);
+    gpr_free(buf);
+    value = grpc_mdstr_hash_table_get(table, wildcard_path);
+    GRPC_MDSTR_UNREF(wildcard_path);
+  }
+  return value;
+}
diff --git a/src/core/lib/transport/service_config.h b/src/core/lib/transport/service_config.h
new file mode 100644
index 0000000000..2ffe475193
--- /dev/null
+++ b/src/core/lib/transport/service_config.h
@@ -0,0 +1,70 @@
+//
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GRPC_CORE_LIB_TRANSPORT_SERVICE_CONFIG_H
+#define GRPC_CORE_LIB_TRANSPORT_SERVICE_CONFIG_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+
+#include "src/core/lib/json/json.h"
+#include "src/core/lib/transport/mdstr_hash_table.h"
+
+typedef struct grpc_service_config grpc_service_config;
+
+grpc_service_config* grpc_service_config_create(const char* json_string);
+void grpc_service_config_destroy(grpc_service_config* service_config);
+
+/// Gets the LB policy name from \a service_config.
+/// Returns NULL if no LB policy name was specified.
+/// Caller does NOT take ownership.
+const char* grpc_service_config_get_lb_policy_name(
+    const grpc_service_config* service_config);
+
+/// Creates a method config table based on the data in \a json.
+/// The table's keys are request paths.  The table's value type is
+/// returned by \a create_value(), based on data parsed from the JSON tree.
+/// \a vtable provides methods used to manage the values.
+/// Returns NULL on error.
+grpc_mdstr_hash_table* grpc_service_config_create_method_config_table(
+    const grpc_service_config* service_config,
+    void* (*create_value)(const grpc_json* method_config_json),
+    const grpc_mdstr_hash_table_vtable* vtable);
+
+/// A helper function for looking up values in the table returned by
+/// \a grpc_service_config_create_method_config_table().
+/// Gets the method config for the specified \a path, which should be of
+/// the form "/service/method".
+/// Returns NULL if the method has no config.
+/// Caller does NOT own a reference to the result.
+void* grpc_method_config_table_get(const grpc_mdstr_hash_table* table,
+                                   const grpc_mdstr* path);
+
+#endif /* GRPC_CORE_LIB_TRANSPORT_SERVICE_CONFIG_H */
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 75aec7a5b4..b448126da8 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -40,6 +40,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/transport_impl.h"
 
@@ -159,6 +160,11 @@ char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
   return transport->vtable->get_peer(exec_ctx, transport);
 }
 
+grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
+                                           grpc_transport *transport) {
+  return transport->vtable->get_endpoint(exec_ctx, transport);
+}
+
 void grpc_transport_stream_op_finish_with_failure(grpc_exec_ctx *exec_ctx,
                                                   grpc_transport_stream_op *op,
                                                   grpc_error *error) {
@@ -207,21 +213,21 @@ void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
 
 void grpc_transport_stream_op_add_cancellation_with_message(
     grpc_transport_stream_op *op, grpc_status_code status,
-    gpr_slice *optional_message) {
+    grpc_slice *optional_message) {
   GPR_ASSERT(status != GRPC_STATUS_OK);
   if (op->cancel_error != GRPC_ERROR_NONE) {
     if (optional_message) {
-      gpr_slice_unref(*optional_message);
+      grpc_slice_unref(*optional_message);
     }
     return;
   }
   grpc_error *error;
   if (optional_message != NULL) {
-    char *msg = gpr_dump_slice(*optional_message, GPR_DUMP_ASCII);
+    char *msg = grpc_dump_slice(*optional_message, GPR_DUMP_ASCII);
     error = grpc_error_set_str(GRPC_ERROR_CREATE(msg),
                                GRPC_ERROR_STR_GRPC_MESSAGE, msg);
     gpr_free(msg);
-    gpr_slice_unref(*optional_message);
+    grpc_slice_unref(*optional_message);
   } else {
     error = GRPC_ERROR_CREATE("Call cancelled");
   }
@@ -231,22 +237,22 @@ void grpc_transport_stream_op_add_cancellation_with_message(
 
 void grpc_transport_stream_op_add_close(grpc_transport_stream_op *op,
                                         grpc_status_code status,
-                                        gpr_slice *optional_message) {
+                                        grpc_slice *optional_message) {
   GPR_ASSERT(status != GRPC_STATUS_OK);
   if (op->cancel_error != GRPC_ERROR_NONE ||
       op->close_error != GRPC_ERROR_NONE) {
     if (optional_message) {
-      gpr_slice_unref(*optional_message);
+      grpc_slice_unref(*optional_message);
     }
     return;
   }
   grpc_error *error;
   if (optional_message != NULL) {
-    char *msg = gpr_dump_slice(*optional_message, GPR_DUMP_ASCII);
+    char *msg = grpc_dump_slice(*optional_message, GPR_DUMP_ASCII);
     error = grpc_error_set_str(GRPC_ERROR_CREATE(msg),
                                GRPC_ERROR_STR_GRPC_MESSAGE, msg);
     gpr_free(msg);
-    gpr_slice_unref(*optional_message);
+    grpc_slice_unref(*optional_message);
   } else {
     error = GRPC_ERROR_CREATE("Call force closed");
   }
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index 50253ebad1..96c26749c8 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -37,6 +37,7 @@
 #include <stddef.h>
 
 #include "src/core/lib/channel/context.h"
+#include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/polling_entity.h"
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/pollset_set.h"
@@ -181,7 +182,7 @@ typedef struct grpc_transport_op {
   bool send_goaway;
   /** what should the goaway contain? */
   grpc_status_code goaway_status;
-  gpr_slice *goaway_message;
+  grpc_slice *goaway_message;
   /** set the callback for accepting new streams;
       this is a permanent callback, unlike the other one-shot closures.
       If true, the callback is set to set_accept_stream_fn, with its
@@ -249,11 +250,11 @@ void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
 
 void grpc_transport_stream_op_add_cancellation_with_message(
     grpc_transport_stream_op *op, grpc_status_code status,
-    gpr_slice *optional_message);
+    grpc_slice *optional_message);
 
 void grpc_transport_stream_op_add_close(grpc_transport_stream_op *op,
                                         grpc_status_code status,
-                                        gpr_slice *optional_message);
+                                        grpc_slice *optional_message);
 
 char *grpc_transport_stream_op_string(grpc_transport_stream_op *op);
 char *grpc_transport_op_string(grpc_transport_op *op);
@@ -283,7 +284,7 @@ void grpc_transport_ping(grpc_transport *transport, grpc_closure *cb);
 
 /* Advise peer of pending connection termination. */
 void grpc_transport_goaway(grpc_transport *transport, grpc_status_code status,
-                           gpr_slice debug_data);
+                           grpc_slice debug_data);
 
 /* Close a transport. Aborts all open streams. */
 void grpc_transport_close(grpc_transport *transport);
@@ -295,6 +296,10 @@ void grpc_transport_destroy(grpc_exec_ctx *exec_ctx, grpc_transport *transport);
 char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
                               grpc_transport *transport);
 
+/* Get the endpoint used by \a transport */
+grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
+                                           grpc_transport *transport);
+
 /* Allocate a grpc_transport_op, and preconfigure the on_consumed closure to
    \a on_consumed and then delete the returned transport op */
 grpc_transport_op *grpc_make_transport_op(grpc_closure *on_consumed);
diff --git a/src/core/lib/transport/transport_impl.h b/src/core/lib/transport/transport_impl.h
index fc7140671b..8553148c35 100644
--- a/src/core/lib/transport/transport_impl.h
+++ b/src/core/lib/transport/transport_impl.h
@@ -74,6 +74,9 @@ typedef struct grpc_transport_vtable {
 
   /* implementation of grpc_transport_get_peer */
   char *(*get_peer)(grpc_exec_ctx *exec_ctx, grpc_transport *self);
+
+  /* implementation of grpc_transport_get_endpoint */
+  grpc_endpoint *(*get_endpoint)(grpc_exec_ctx *exec_ctx, grpc_transport *self);
 } grpc_transport_vtable;
 
 /* an instance of a grpc transport */
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index 533ec52077..58d6ad508e 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -40,6 +40,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
+#include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/connectivity_state.h"
 
@@ -48,12 +49,12 @@
 
 static void put_metadata(gpr_strvec *b, grpc_mdelem *md) {
   gpr_strvec_add(b, gpr_strdup("key="));
-  gpr_strvec_add(b,
-                 gpr_dump_slice(md->key->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
+  gpr_strvec_add(
+      b, grpc_dump_slice(md->key->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
 
   gpr_strvec_add(b, gpr_strdup(" value="));
   gpr_strvec_add(
-      b, gpr_dump_slice(md->value->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
+      b, grpc_dump_slice(md->value->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
 }
 
 static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
@@ -175,8 +176,8 @@ char *grpc_transport_op_string(grpc_transport_op *op) {
     first = false;
     char *msg = op->goaway_message == NULL
                     ? "null"
-                    : gpr_dump_slice(*op->goaway_message,
-                                     GPR_DUMP_ASCII | GPR_DUMP_HEX);
+                    : grpc_dump_slice(*op->goaway_message,
+                                      GPR_DUMP_ASCII | GPR_DUMP_HEX);
     gpr_asprintf(&tmp, "SEND_GOAWAY:status=%d:msg=%s", op->goaway_status, msg);
     if (op->goaway_message != NULL) gpr_free(msg);
     gpr_strvec_add(&b, tmp);
diff --git a/src/core/lib/tsi/ssl_transport_security.c b/src/core/lib/tsi/ssl_transport_security.c
index 749b46e19f..366dca9507 100644
--- a/src/core/lib/tsi/ssl_transport_security.c
+++ b/src/core/lib/tsi/ssl_transport_security.c
@@ -31,9 +31,6 @@
  *
  */
 
-#include "src/core/lib/iomgr/sockaddr.h"
-
-#include "src/core/lib/iomgr/socket_utils.h"
 #include "src/core/lib/tsi/ssl_transport_security.h"
 
 #include <grpc/support/port_platform.h>
@@ -41,6 +38,15 @@
 #include <limits.h>
 #include <string.h>
 
+/* TODO(jboeuf): refactor inet_ntop into a portability header. */
+/* Note: for whomever reads this and tries to refactor this, this
+   can't be in grpc, it has to be in gpr. */
+#ifdef GPR_WINDOWS
+#include <ws2tcpip.h>
+#else
+#include <arpa/inet.h>
+#endif
+
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
@@ -349,8 +355,8 @@ static tsi_result add_subject_alt_names_properties_to_peer(
         result = TSI_INTERNAL_ERROR;
         break;
       }
-      const char *name = grpc_inet_ntop(af, subject_alt_name->d.iPAddress->data,
-                                        ntop_buf, INET6_ADDRSTRLEN);
+      const char *name = inet_ntop(af, subject_alt_name->d.iPAddress->data,
+                                   ntop_buf, INET6_ADDRSTRLEN);
       if (name == NULL) {
         gpr_log(GPR_ERROR, "Could not get IP string from asn1 octet.");
         result = TSI_INTERNAL_ERROR;
diff --git a/src/cpp/client/channel_cc.cc b/src/cpp/client/channel_cc.cc
index 43b3875cb3..357d8317ad 100644
--- a/src/cpp/client/channel_cc.cc
+++ b/src/cpp/client/channel_cc.cc
@@ -47,8 +47,9 @@
 #include <grpc++/support/status.h>
 #include <grpc++/support/time.h>
 #include <grpc/grpc.h>
+#include <grpc/slice.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 #include "src/core/lib/profiling/timers.h"
 
 namespace grpc {
@@ -61,6 +62,35 @@ Channel::Channel(const grpc::string& host, grpc_channel* channel)
 
 Channel::~Channel() { grpc_channel_destroy(c_channel_); }
 
+namespace {
+
+grpc::string GetChannelInfoField(grpc_channel* channel,
+                                 grpc_channel_info* channel_info,
+                                 char*** channel_info_field) {
+  char* value = NULL;
+  memset(channel_info, 0, sizeof(*channel_info));
+  *channel_info_field = &value;
+  grpc_channel_get_info(channel, channel_info);
+  if (value == NULL) return "";
+  grpc::string result = value;
+  gpr_free(value);
+  return result;
+}
+
+}  // namespace
+
+grpc::string Channel::GetLoadBalancingPolicyName() const {
+  grpc_channel_info channel_info;
+  return GetChannelInfoField(c_channel_, &channel_info,
+                             &channel_info.lb_policy_name);
+}
+
+grpc::string Channel::GetServiceConfigJSON() const {
+  grpc_channel_info channel_info;
+  return GetChannelInfoField(c_channel_, &channel_info,
+                             &channel_info.service_config_json);
+}
+
 Call Channel::CreateCall(const RpcMethod& method, ClientContext* context,
                          CompletionQueue* cq) {
   const bool kRegistered = method.channel_tag() && context->authority().empty();
@@ -106,11 +136,11 @@ grpc_connectivity_state Channel::GetState(bool try_to_connect) {
 }
 
 namespace {
-class TagSaver GRPC_FINAL : public CompletionQueueTag {
+class TagSaver final : public CompletionQueueTag {
  public:
   explicit TagSaver(void* tag) : tag_(tag) {}
-  ~TagSaver() GRPC_OVERRIDE {}
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+  ~TagSaver() override {}
+  bool FinalizeResult(void** tag, bool* status) override {
     *tag = tag_;
     delete this;
     return true;
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index b6008f47b1..c073741dac 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -45,12 +45,12 @@
 
 namespace grpc {
 
-class DefaultGlobalClientCallbacks GRPC_FINAL
+class DefaultGlobalClientCallbacks final
     : public ClientContext::GlobalCallbacks {
  public:
-  ~DefaultGlobalClientCallbacks() GRPC_OVERRIDE {}
-  void DefaultConstructor(ClientContext* context) GRPC_OVERRIDE {}
-  void Destructor(ClientContext* context) GRPC_OVERRIDE {}
+  ~DefaultGlobalClientCallbacks() override {}
+  void DefaultConstructor(ClientContext* context) override {}
+  void Destructor(ClientContext* context) override {}
 };
 
 static DefaultGlobalClientCallbacks g_default_client_callbacks;
@@ -93,7 +93,7 @@ void ClientContext::AddMetadata(const grpc::string& meta_key,
 
 void ClientContext::set_call(grpc_call* call,
                              const std::shared_ptr<Channel>& channel) {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   GPR_ASSERT(call_ == nullptr);
   call_ = call;
   channel_ = channel;
@@ -119,7 +119,7 @@ void ClientContext::set_compression_algorithm(
 }
 
 void ClientContext::TryCancel() {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   if (call_) {
     grpc_call_cancel(call_, nullptr);
   } else {
diff --git a/src/cpp/client/cronet_credentials.cc b/src/cpp/client/cronet_credentials.cc
index 60cad097db..8e94cf0ad7 100644
--- a/src/cpp/client/cronet_credentials.cc
+++ b/src/cpp/client/cronet_credentials.cc
@@ -40,12 +40,12 @@
 
 namespace grpc {
 
-class CronetChannelCredentialsImpl GRPC_FINAL : public ChannelCredentials {
+class CronetChannelCredentialsImpl final : public ChannelCredentials {
  public:
   CronetChannelCredentialsImpl(void* engine) : engine_(engine) {}
 
   std::shared_ptr<grpc::Channel> CreateChannel(
-      const string& target, const grpc::ChannelArguments& args) GRPC_OVERRIDE {
+      const string& target, const grpc::ChannelArguments& args) override {
     grpc_channel_args channel_args;
     args.SetChannelArgs(&channel_args);
     return CreateChannelInternal(
@@ -53,9 +53,7 @@ class CronetChannelCredentialsImpl GRPC_FINAL : public ChannelCredentials {
                                               &channel_args, nullptr));
   }
 
-  SecureChannelCredentials* AsSecureCredentials() GRPC_OVERRIDE {
-    return nullptr;
-  }
+  SecureChannelCredentials* AsSecureCredentials() override { return nullptr; }
 
  private:
   void* engine_;
diff --git a/src/cpp/client/insecure_credentials.cc b/src/cpp/client/insecure_credentials.cc
index 13019a7117..116f1dd4ad 100644
--- a/src/cpp/client/insecure_credentials.cc
+++ b/src/cpp/client/insecure_credentials.cc
@@ -43,10 +43,10 @@
 namespace grpc {
 
 namespace {
-class InsecureChannelCredentialsImpl GRPC_FINAL : public ChannelCredentials {
+class InsecureChannelCredentialsImpl final : public ChannelCredentials {
  public:
   std::shared_ptr<grpc::Channel> CreateChannel(
-      const string& target, const grpc::ChannelArguments& args) GRPC_OVERRIDE {
+      const string& target, const grpc::ChannelArguments& args) override {
     grpc_channel_args channel_args;
     args.SetChannelArgs(&channel_args);
     return CreateChannelInternal(
@@ -54,9 +54,7 @@ class InsecureChannelCredentialsImpl GRPC_FINAL : public ChannelCredentials {
         grpc_insecure_channel_create(target.c_str(), &channel_args, nullptr));
   }
 
-  SecureChannelCredentials* AsSecureCredentials() GRPC_OVERRIDE {
-    return nullptr;
-  }
+  SecureChannelCredentials* AsSecureCredentials() override { return nullptr; }
 };
 }  // namespace
 
diff --git a/src/cpp/client/secure_credentials.h b/src/cpp/client/secure_credentials.h
index ae41ef8007..281db17e98 100644
--- a/src/cpp/client/secure_credentials.h
+++ b/src/cpp/client/secure_credentials.h
@@ -43,34 +43,34 @@
 
 namespace grpc {
 
-class SecureChannelCredentials GRPC_FINAL : public ChannelCredentials {
+class SecureChannelCredentials final : public ChannelCredentials {
  public:
   explicit SecureChannelCredentials(grpc_channel_credentials* c_creds);
   ~SecureChannelCredentials() { grpc_channel_credentials_release(c_creds_); }
   grpc_channel_credentials* GetRawCreds() { return c_creds_; }
 
   std::shared_ptr<grpc::Channel> CreateChannel(
-      const string& target, const grpc::ChannelArguments& args) GRPC_OVERRIDE;
-  SecureChannelCredentials* AsSecureCredentials() GRPC_OVERRIDE { return this; }
+      const string& target, const grpc::ChannelArguments& args) override;
+  SecureChannelCredentials* AsSecureCredentials() override { return this; }
 
  private:
   grpc_channel_credentials* const c_creds_;
 };
 
-class SecureCallCredentials GRPC_FINAL : public CallCredentials {
+class SecureCallCredentials final : public CallCredentials {
  public:
   explicit SecureCallCredentials(grpc_call_credentials* c_creds);
   ~SecureCallCredentials() { grpc_call_credentials_release(c_creds_); }
   grpc_call_credentials* GetRawCreds() { return c_creds_; }
 
-  bool ApplyToCall(grpc_call* call) GRPC_OVERRIDE;
-  SecureCallCredentials* AsSecureCredentials() GRPC_OVERRIDE { return this; }
+  bool ApplyToCall(grpc_call* call) override;
+  SecureCallCredentials* AsSecureCredentials() override { return this; }
 
  private:
   grpc_call_credentials* const c_creds_;
 };
 
-class MetadataCredentialsPluginWrapper GRPC_FINAL {
+class MetadataCredentialsPluginWrapper final {
  public:
   static void Destroy(void* wrapper);
   static void GetMetadata(void* wrapper, grpc_auth_metadata_context context,
diff --git a/src/cpp/common/channel_arguments.cc b/src/cpp/common/channel_arguments.cc
index d136d49c89..0301b5b8ec 100644
--- a/src/cpp/common/channel_arguments.cc
+++ b/src/cpp/common/channel_arguments.cc
@@ -34,18 +34,17 @@
 
 #include <sstream>
 
+#include <grpc++/grpc++.h>
 #include <grpc++/resource_quota.h>
 #include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/support/log.h>
 #include "src/core/lib/channel/channel_args.h"
-
+#include "src/core/lib/iomgr/socket_mutator.h"
 namespace grpc {
 
 ChannelArguments::ChannelArguments() {
-  std::ostringstream user_agent_prefix;
-  user_agent_prefix << "grpc-c++/" << grpc_version_string();
   // This will be ignored if used on the server side.
-  SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, user_agent_prefix.str());
+  SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, "grpc-c++/" + Version());
 }
 
 ChannelArguments::ChannelArguments(const ChannelArguments& other)
@@ -89,6 +88,24 @@ void ChannelArguments::SetCompressionAlgorithm(
   SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, algorithm);
 }
 
+void ChannelArguments::SetSocketMutator(grpc_socket_mutator* mutator) {
+  if (!mutator) {
+    return;
+  }
+  grpc_arg mutator_arg = grpc_socket_mutator_to_arg(mutator);
+  bool replaced = false;
+  for (auto it = args_.begin(); it != args_.end(); ++it) {
+    if (it->type == mutator_arg.type &&
+        grpc::string(it->key) == grpc::string(mutator_arg.key)) {
+      it->value.pointer.vtable->destroy(it->value.pointer.p);
+      it->value.pointer = mutator_arg.value.pointer;
+    }
+  }
+  if (!replaced) {
+    args_.push_back(mutator_arg);
+  }
+}
+
 // Note: a second call to this will add in front the result of the first call.
 // An example is calling this on a copy of ChannelArguments which already has a
 // prefix. The user can build up a prefix string by calling this multiple times,
@@ -121,6 +138,16 @@ void ChannelArguments::SetResourceQuota(
                        grpc_resource_quota_arg_vtable());
 }
 
+void ChannelArguments::SetLoadBalancingPolicyName(
+    const grpc::string& lb_policy_name) {
+  SetString(GRPC_ARG_LB_POLICY_NAME, lb_policy_name);
+}
+
+void ChannelArguments::SetServiceConfigJSON(
+    const grpc::string& service_config_json) {
+  SetString(GRPC_ARG_SERVICE_CONFIG, service_config_json);
+}
+
 void ChannelArguments::SetInt(const grpc::string& key, int value) {
   grpc_arg arg;
   arg.type = GRPC_ARG_INTEGER;
diff --git a/src/cpp/common/channel_filter.cc b/src/cpp/common/channel_filter.cc
index 25cd49cb7c..ad2c0f2295 100644
--- a/src/cpp/common/channel_filter.cc
+++ b/src/cpp/common/channel_filter.cc
@@ -57,6 +57,11 @@ void ChannelData::StartTransportOp(grpc_exec_ctx *exec_ctx,
   grpc_channel_next_op(exec_ctx, elem, op->op());
 }
 
+void ChannelData::GetInfo(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+                          const grpc_channel_info *channel_info) {
+  grpc_channel_next_get_info(exec_ctx, elem, channel_info);
+}
+
 // CallData
 
 void CallData::StartTransportStreamOp(grpc_exec_ctx *exec_ctx,
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index ae32e02f69..c9f50df732 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -216,23 +216,24 @@ class TransportStreamOp {
 /// Represents channel data.
 class ChannelData {
  public:
-  virtual ~ChannelData() {
-    if (peer_) gpr_free((void *)peer_);
-  }
+  virtual ~ChannelData() {}
 
-  /// Caller does NOT take ownership of result.
-  const char *peer() const { return peer_; }
+  /// Initializes the call data.
+  virtual grpc_error *Init(grpc_exec_ctx *exec_ctx,
+                           grpc_channel_element_args *args) {
+    return GRPC_ERROR_NONE;
+  }
 
   // TODO(roth): Find a way to avoid passing elem into these methods.
+
   virtual void StartTransportOp(grpc_exec_ctx *exec_ctx,
                                 grpc_channel_element *elem, TransportOp *op);
 
- protected:
-  /// Takes ownership of \a peer.
-  ChannelData(const grpc_channel_args &args, const char *peer) : peer_(peer) {}
+  virtual void GetInfo(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+                       const grpc_channel_info *channel_info);
 
- private:
-  const char *peer_;
+ protected:
+  ChannelData() {}
 };
 
 /// Represents call data.
@@ -241,7 +242,10 @@ class CallData {
   virtual ~CallData() {}
 
   /// Initializes the call data.
-  virtual grpc_error *Init() { return GRPC_ERROR_NONE; }
+  virtual grpc_error *Init(grpc_exec_ctx *exec_ctx, ChannelData *channel_data,
+                           grpc_call_element_args *args) {
+    return GRPC_ERROR_NONE;
+  }
 
   // TODO(roth): Find a way to avoid passing elem into these methods.
 
@@ -259,7 +263,7 @@ class CallData {
   virtual char *GetPeer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem);
 
  protected:
-  explicit CallData(const ChannelData &) {}
+  CallData() {}
 };
 
 namespace internal {
@@ -268,19 +272,15 @@ namespace internal {
 // Members of this class correspond to the members of the C
 // grpc_channel_filter struct.
 template <typename ChannelDataType, typename CallDataType>
-class ChannelFilter GRPC_FINAL {
+class ChannelFilter final {
  public:
   static const size_t channel_data_size = sizeof(ChannelDataType);
 
-  static void InitChannelElement(grpc_exec_ctx *exec_ctx,
-                                 grpc_channel_element *elem,
-                                 grpc_channel_element_args *args) {
-    const char *peer =
-        args->optional_transport
-            ? grpc_transport_get_peer(exec_ctx, args->optional_transport)
-            : nullptr;
-    // Construct the object in the already-allocated memory.
-    new (elem->channel_data) ChannelDataType(*args->channel_args, peer);
+  static grpc_error *InitChannelElement(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_element *elem,
+                                        grpc_channel_element_args *args) {
+    ChannelDataType *channel_data = new (elem->channel_data) ChannelDataType();
+    return channel_data->Init(exec_ctx, args);
   }
 
   static void DestroyChannelElement(grpc_exec_ctx *exec_ctx,
@@ -296,16 +296,22 @@ class ChannelFilter GRPC_FINAL {
     channel_data->StartTransportOp(exec_ctx, elem, &op_wrapper);
   }
 
+  static void GetChannelInfo(grpc_exec_ctx *exec_ctx,
+                             grpc_channel_element *elem,
+                             const grpc_channel_info *channel_info) {
+    ChannelDataType *channel_data = (ChannelDataType *)elem->channel_data;
+    channel_data->GetInfo(exec_ctx, elem, channel_info);
+  }
+
   static const size_t call_data_size = sizeof(CallDataType);
 
   static grpc_error *InitCallElement(grpc_exec_ctx *exec_ctx,
                                      grpc_call_element *elem,
                                      grpc_call_element_args *args) {
-    const ChannelDataType &channel_data =
-        *(ChannelDataType *)elem->channel_data;
+    ChannelDataType *channel_data = (ChannelDataType *)elem->channel_data;
     // Construct the object in the already-allocated memory.
-    CallDataType *call_data = new (elem->call_data) CallDataType(channel_data);
-    return call_data->Init();
+    CallDataType *call_data = new (elem->call_data) CallDataType();
+    return call_data->Init(exec_ctx, channel_data, args);
   }
 
   static void DestroyCallElement(grpc_exec_ctx *exec_ctx,
@@ -376,7 +382,8 @@ void RegisterChannelFilter(
        FilterType::call_data_size, FilterType::InitCallElement,
        FilterType::SetPollsetOrPollsetSet, FilterType::DestroyCallElement,
        FilterType::channel_data_size, FilterType::InitChannelElement,
-       FilterType::DestroyChannelElement, FilterType::GetPeer, name}};
+       FilterType::DestroyChannelElement, FilterType::GetPeer,
+       FilterType::GetChannelInfo, name}};
   internal::channel_filters->push_back(filter_record);
 }
 
diff --git a/src/cpp/common/completion_queue_cc.cc b/src/cpp/common/completion_queue_cc.cc
index 00cc102f92..0408a41085 100644
--- a/src/cpp/common/completion_queue_cc.cc
+++ b/src/cpp/common/completion_queue_cc.cc
@@ -43,11 +43,21 @@ namespace grpc {
 
 static internal::GrpcLibraryInitializer g_gli_initializer;
 
-CompletionQueue::CompletionQueue(grpc_completion_queue* take) : cq_(take) {}
+CompletionQueue::CompletionQueue(grpc_completion_queue* take) : cq_(take) {
+  InitialAvalanching();
+}
 
 void CompletionQueue::Shutdown() {
   g_gli_initializer.summon();
-  grpc_completion_queue_shutdown(cq_);
+  CompleteAvalanching();
+}
+
+void CompletionQueue::CompleteAvalanching() {
+  // Check if this was the last avalanching operation
+  if (gpr_atm_no_barrier_fetch_add(&avalanches_in_flight_,
+                                   static_cast<gpr_atm>(-1)) == 1) {
+    grpc_completion_queue_shutdown(cq_);
+  }
 }
 
 CompletionQueue::NextStatus CompletionQueue::AsyncNextInternal(
diff --git a/src/cpp/common/core_codegen.cc b/src/cpp/common/core_codegen.cc
index ce02202976..a07ad54376 100644
--- a/src/cpp/common/core_codegen.cc
+++ b/src/cpp/common/core_codegen.cc
@@ -39,11 +39,11 @@
 #include <grpc/byte_buffer.h>
 #include <grpc/byte_buffer_reader.h>
 #include <grpc/grpc.h>
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/sync.h>
 
 #include "src/core/lib/profiling/timers.h"
@@ -102,31 +102,34 @@ void CoreCodegen::grpc_byte_buffer_reader_destroy(
 }
 
 int CoreCodegen::grpc_byte_buffer_reader_next(grpc_byte_buffer_reader* reader,
-                                              gpr_slice* slice) {
+                                              grpc_slice* slice) {
   return ::grpc_byte_buffer_reader_next(reader, slice);
 }
 
-grpc_byte_buffer* CoreCodegen::grpc_raw_byte_buffer_create(gpr_slice* slice,
+grpc_byte_buffer* CoreCodegen::grpc_raw_byte_buffer_create(grpc_slice* slice,
                                                            size_t nslices) {
   return ::grpc_raw_byte_buffer_create(slice, nslices);
 }
 
-gpr_slice CoreCodegen::gpr_slice_malloc(size_t length) {
-  return ::gpr_slice_malloc(length);
+grpc_slice CoreCodegen::grpc_slice_malloc(size_t length) {
+  return ::grpc_slice_malloc(length);
 }
 
-void CoreCodegen::gpr_slice_unref(gpr_slice slice) { ::gpr_slice_unref(slice); }
+void CoreCodegen::grpc_slice_unref(grpc_slice slice) {
+  ::grpc_slice_unref(slice);
+}
 
-gpr_slice CoreCodegen::gpr_slice_split_tail(gpr_slice* s, size_t split) {
-  return ::gpr_slice_split_tail(s, split);
+grpc_slice CoreCodegen::grpc_slice_split_tail(grpc_slice* s, size_t split) {
+  return ::grpc_slice_split_tail(s, split);
 }
 
-void CoreCodegen::gpr_slice_buffer_add(gpr_slice_buffer* sb, gpr_slice slice) {
-  ::gpr_slice_buffer_add(sb, slice);
+void CoreCodegen::grpc_slice_buffer_add(grpc_slice_buffer* sb,
+                                        grpc_slice slice) {
+  ::grpc_slice_buffer_add(sb, slice);
 }
 
-void CoreCodegen::gpr_slice_buffer_pop(gpr_slice_buffer* sb) {
-  ::gpr_slice_buffer_pop(sb);
+void CoreCodegen::grpc_slice_buffer_pop(grpc_slice_buffer* sb) {
+  ::grpc_slice_buffer_pop(sb);
 }
 
 void CoreCodegen::grpc_metadata_array_init(grpc_metadata_array* array) {
diff --git a/src/cpp/common/secure_auth_context.h b/src/cpp/common/secure_auth_context.h
index c9f1dad131..98f5f09e27 100644
--- a/src/cpp/common/secure_auth_context.h
+++ b/src/cpp/common/secure_auth_context.h
@@ -40,30 +40,29 @@ struct grpc_auth_context;
 
 namespace grpc {
 
-class SecureAuthContext GRPC_FINAL : public AuthContext {
+class SecureAuthContext final : public AuthContext {
  public:
   SecureAuthContext(grpc_auth_context* ctx, bool take_ownership);
 
-  ~SecureAuthContext() GRPC_OVERRIDE;
+  ~SecureAuthContext() override;
 
-  bool IsPeerAuthenticated() const GRPC_OVERRIDE;
+  bool IsPeerAuthenticated() const override;
 
-  std::vector<grpc::string_ref> GetPeerIdentity() const GRPC_OVERRIDE;
+  std::vector<grpc::string_ref> GetPeerIdentity() const override;
 
-  grpc::string GetPeerIdentityPropertyName() const GRPC_OVERRIDE;
+  grpc::string GetPeerIdentityPropertyName() const override;
 
   std::vector<grpc::string_ref> FindPropertyValues(
-      const grpc::string& name) const GRPC_OVERRIDE;
+      const grpc::string& name) const override;
 
-  AuthPropertyIterator begin() const GRPC_OVERRIDE;
+  AuthPropertyIterator begin() const override;
 
-  AuthPropertyIterator end() const GRPC_OVERRIDE;
+  AuthPropertyIterator end() const override;
 
   void AddProperty(const grpc::string& key,
-                   const grpc::string_ref& value) GRPC_OVERRIDE;
+                   const grpc::string_ref& value) override;
 
-  virtual bool SetPeerIdentityPropertyName(const grpc::string& name)
-      GRPC_OVERRIDE;
+  virtual bool SetPeerIdentityPropertyName(const grpc::string& name) override;
 
  private:
   grpc_auth_context* ctx_;
diff --git a/src/core/lib/iomgr/ev_poll_and_epoll_posix.h b/src/cpp/common/version_cc.cc
index 06d6dbf29d..7be338417f 100644
--- a/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
+++ b/src/cpp/common/version_cc.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
-#define GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
+/* This file is autogenerated from:
+   templates/src/core/surface/version.c.template */
 
-#include "src/core/lib/iomgr/ev_posix.h"
+#include <grpc++/grpc++.h>
 
-const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void);
-
-#endif /* GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H */
+namespace grpc {
+grpc::string Version() { return "1.1.0-dev"; }
+}
diff --git a/src/cpp/ext/proto_server_reflection.h b/src/cpp/ext/proto_server_reflection.h
index f66f3c2c9a..ca0ba97d88 100644
--- a/src/cpp/ext/proto_server_reflection.h
+++ b/src/cpp/ext/proto_server_reflection.h
@@ -31,35 +31,18 @@
  *
  */
 
-/*
-  - If the generated header `grpc++/ext/reflection.grpc.pb.h` needs to be
-    installed, target `grpc++_reflection` in `build.yaml` should use the
-    filegroup `grpc++_reflection_proto`, and GRPC_NO_GENERATED_CODE should not
-    be defined.
-  - If the server reflection library needs to generate `reflection.grpc.pb.h`
-    from `reflection.proto` at compile time, the generated header
-    `grpc++/ext/reflection.grpc.pb.h` should not be installed. In this case,
-    target `grpc++_reflection` should depend on `grpc++_reflection_codegen`, and
-    GRPC_NO_GENERATED_CODE should be defined.
-*/
-
 #ifndef GRPC_INTERNAL_CPP_EXT_PROTO_SERVER_REFLECTION_H
 #define GRPC_INTERNAL_CPP_EXT_PROTO_SERVER_REFLECTION_H
 
 #include <unordered_set>
 #include <vector>
 
-// GRPC_NO_GENERATED_CODE indicates generated pb files should not be used
-#ifdef GRPC_NO_GENERATED_CODE
-#include "src/proto/grpc/reflection/v1alpha/reflection.grpc.pb.h"
-#else
-#include <grpc++/ext/reflection.grpc.pb.h>
-#endif  // GRPC_NO_GENERATED_CODE
 #include <grpc++/grpc++.h>
+#include "src/proto/grpc/reflection/v1alpha/reflection.grpc.pb.h"
 
 namespace grpc {
 
-class ProtoServerReflection GRPC_FINAL
+class ProtoServerReflection final
     : public reflection::v1alpha::ServerReflection::Service {
  public:
   ProtoServerReflection();
@@ -73,7 +56,7 @@ class ProtoServerReflection GRPC_FINAL
       ServerContext* context,
       ServerReaderWriter<reflection::v1alpha::ServerReflectionResponse,
                          reflection::v1alpha::ServerReflectionRequest>* stream)
-      GRPC_OVERRIDE;
+      override;
 
  private:
   Status ListService(ServerContext* context,
diff --git a/src/cpp/ext/reflection.grpc.pb.cc b/src/cpp/ext/reflection.grpc.pb.cc
deleted file mode 100644
index 8139c8ea16..0000000000
--- a/src/cpp/ext/reflection.grpc.pb.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-
-// Generated by tools/codegen/extensions/gen_reflection_proto.sh
-// If you make any local change, they will be lost.
-// source: reflection.proto
-
-#include <grpc++/ext/reflection.pb.h>
-#include <grpc++/ext/reflection.grpc.pb.h>
-
-#include <grpc++/impl/codegen/async_stream.h>
-#include <grpc++/impl/codegen/async_unary_call.h>
-#include <grpc++/impl/codegen/channel_interface.h>
-#include <grpc++/impl/codegen/client_unary_call.h>
-#include <grpc++/impl/codegen/method_handler_impl.h>
-#include <grpc++/impl/codegen/rpc_service_method.h>
-#include <grpc++/impl/codegen/service_type.h>
-#include <grpc++/impl/codegen/sync_stream.h>
-namespace grpc {
-namespace reflection {
-namespace v1alpha {
-
-static const char* ServerReflection_method_names[] = {
-  "/grpc.reflection.v1alpha.ServerReflection/ServerReflectionInfo",
-};
-
-std::unique_ptr< ServerReflection::Stub> ServerReflection::NewStub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options) {
-  std::unique_ptr< ServerReflection::Stub> stub(new ServerReflection::Stub(channel));
-  return stub;
-}
-
-ServerReflection::Stub::Stub(const std::shared_ptr< ::grpc::ChannelInterface>& channel)
-  : channel_(channel), rpcmethod_ServerReflectionInfo_(ServerReflection_method_names[0], ::grpc::RpcMethod::BIDI_STREAMING, channel)
-  {}
-
-::grpc::ClientReaderWriter< ::grpc::reflection::v1alpha::ServerReflectionRequest, ::grpc::reflection::v1alpha::ServerReflectionResponse>* ServerReflection::Stub::ServerReflectionInfoRaw(::grpc::ClientContext* context) {
-  return new ::grpc::ClientReaderWriter< ::grpc::reflection::v1alpha::ServerReflectionRequest, ::grpc::reflection::v1alpha::ServerReflectionResponse>(channel_.get(), rpcmethod_ServerReflectionInfo_, context);
-}
-
-::grpc::ClientAsyncReaderWriter< ::grpc::reflection::v1alpha::ServerReflectionRequest, ::grpc::reflection::v1alpha::ServerReflectionResponse>* ServerReflection::Stub::AsyncServerReflectionInfoRaw(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag) {
-  return new ::grpc::ClientAsyncReaderWriter< ::grpc::reflection::v1alpha::ServerReflectionRequest, ::grpc::reflection::v1alpha::ServerReflectionResponse>(channel_.get(), cq, rpcmethod_ServerReflectionInfo_, context, tag);
-}
-
-ServerReflection::Service::Service() {
-  (void)ServerReflection_method_names;
-  AddMethod(new ::grpc::RpcServiceMethod(
-      ServerReflection_method_names[0],
-      ::grpc::RpcMethod::BIDI_STREAMING,
-      new ::grpc::BidiStreamingHandler< ServerReflection::Service, ::grpc::reflection::v1alpha::ServerReflectionRequest, ::grpc::reflection::v1alpha::ServerReflectionResponse>(
-          std::mem_fn(&ServerReflection::Service::ServerReflectionInfo), this)));
-}
-
-ServerReflection::Service::~Service() {
-}
-
-::grpc::Status ServerReflection::Service::ServerReflectionInfo(::grpc::ServerContext* context, ::grpc::ServerReaderWriter< ::grpc::reflection::v1alpha::ServerReflectionResponse, ::grpc::reflection::v1alpha::ServerReflectionRequest>* stream) {
-  (void) context;
-  (void) stream;
-  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
-}
-
-
-}  // namespace grpc
-}  // namespace reflection
-}  // namespace v1alpha
-
diff --git a/src/cpp/ext/reflection.pb.cc b/src/cpp/ext/reflection.pb.cc
deleted file mode 100644
index d75503b3ce..0000000000
--- a/src/cpp/ext/reflection.pb.cc
+++ /dev/null
@@ -1,4045 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-
-// Generated by tools/codegen/extensions/gen_reflection_proto.sh
-// source: reflection.proto
-
-#define INTERNAL_SUPPRESS_PROTOBUF_FIELD_DEPRECATION
-#include <grpc++/ext/reflection.pb.h>
-
-#include <algorithm>
-
-#include <google/protobuf/stubs/common.h>
-#include <google/protobuf/stubs/port.h>
-#include <google/protobuf/stubs/once.h>
-#include <google/protobuf/io/coded_stream.h>
-#include <google/protobuf/wire_format_lite_inl.h>
-#include <google/protobuf/descriptor.h>
-#include <google/protobuf/generated_message_reflection.h>
-#include <google/protobuf/reflection_ops.h>
-#include <google/protobuf/wire_format.h>
-// @@protoc_insertion_point(includes)
-
-namespace grpc {
-namespace reflection {
-namespace v1alpha {
-
-namespace {
-
-const ::google::protobuf::Descriptor* ServerReflectionRequest_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ServerReflectionRequest_reflection_ = NULL;
-struct ServerReflectionRequestOneofInstance {
-  ::google::protobuf::internal::ArenaStringPtr file_by_filename_;
-  ::google::protobuf::internal::ArenaStringPtr file_containing_symbol_;
-  const ::grpc::reflection::v1alpha::ExtensionRequest* file_containing_extension_;
-  ::google::protobuf::internal::ArenaStringPtr all_extension_numbers_of_type_;
-  ::google::protobuf::internal::ArenaStringPtr list_services_;
-}* ServerReflectionRequest_default_oneof_instance_ = NULL;
-const ::google::protobuf::Descriptor* ExtensionRequest_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ExtensionRequest_reflection_ = NULL;
-const ::google::protobuf::Descriptor* ServerReflectionResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ServerReflectionResponse_reflection_ = NULL;
-struct ServerReflectionResponseOneofInstance {
-  const ::grpc::reflection::v1alpha::FileDescriptorResponse* file_descriptor_response_;
-  const ::grpc::reflection::v1alpha::ExtensionNumberResponse* all_extension_numbers_response_;
-  const ::grpc::reflection::v1alpha::ListServiceResponse* list_services_response_;
-  const ::grpc::reflection::v1alpha::ErrorResponse* error_response_;
-}* ServerReflectionResponse_default_oneof_instance_ = NULL;
-const ::google::protobuf::Descriptor* FileDescriptorResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  FileDescriptorResponse_reflection_ = NULL;
-const ::google::protobuf::Descriptor* ExtensionNumberResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ExtensionNumberResponse_reflection_ = NULL;
-const ::google::protobuf::Descriptor* ListServiceResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ListServiceResponse_reflection_ = NULL;
-const ::google::protobuf::Descriptor* ServiceResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ServiceResponse_reflection_ = NULL;
-const ::google::protobuf::Descriptor* ErrorResponse_descriptor_ = NULL;
-const ::google::protobuf::internal::GeneratedMessageReflection*
-  ErrorResponse_reflection_ = NULL;
-
-}  // namespace
-
-
-void protobuf_AssignDesc_reflection_2eproto() GOOGLE_ATTRIBUTE_COLD;
-void protobuf_AssignDesc_reflection_2eproto() {
-  protobuf_AddDesc_reflection_2eproto();
-  const ::google::protobuf::FileDescriptor* file =
-    ::google::protobuf::DescriptorPool::generated_pool()->FindFileByName(
-      "reflection.proto");
-  GOOGLE_CHECK(file != NULL);
-  ServerReflectionRequest_descriptor_ = file->message_type(0);
-  static const int ServerReflectionRequest_offsets_[7] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionRequest, host_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionRequest_default_oneof_instance_, file_by_filename_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionRequest_default_oneof_instance_, file_containing_symbol_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionRequest_default_oneof_instance_, file_containing_extension_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionRequest_default_oneof_instance_, all_extension_numbers_of_type_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionRequest_default_oneof_instance_, list_services_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionRequest, message_request_),
-  };
-  ServerReflectionRequest_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ServerReflectionRequest_descriptor_,
-      ServerReflectionRequest::internal_default_instance(),
-      ServerReflectionRequest_offsets_,
-      -1,
-      -1,
-      -1,
-      ServerReflectionRequest_default_oneof_instance_,
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionRequest, _oneof_case_[0]),
-      sizeof(ServerReflectionRequest),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionRequest, _internal_metadata_));
-  ExtensionRequest_descriptor_ = file->message_type(1);
-  static const int ExtensionRequest_offsets_[2] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionRequest, containing_type_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionRequest, extension_number_),
-  };
-  ExtensionRequest_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ExtensionRequest_descriptor_,
-      ExtensionRequest::internal_default_instance(),
-      ExtensionRequest_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(ExtensionRequest),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionRequest, _internal_metadata_));
-  ServerReflectionResponse_descriptor_ = file->message_type(2);
-  static const int ServerReflectionResponse_offsets_[7] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionResponse, valid_host_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionResponse, original_request_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionResponse_default_oneof_instance_, file_descriptor_response_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionResponse_default_oneof_instance_, all_extension_numbers_response_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionResponse_default_oneof_instance_, list_services_response_),
-    PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET(ServerReflectionResponse_default_oneof_instance_, error_response_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionResponse, message_response_),
-  };
-  ServerReflectionResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ServerReflectionResponse_descriptor_,
-      ServerReflectionResponse::internal_default_instance(),
-      ServerReflectionResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      ServerReflectionResponse_default_oneof_instance_,
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionResponse, _oneof_case_[0]),
-      sizeof(ServerReflectionResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServerReflectionResponse, _internal_metadata_));
-  FileDescriptorResponse_descriptor_ = file->message_type(3);
-  static const int FileDescriptorResponse_offsets_[1] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(FileDescriptorResponse, file_descriptor_proto_),
-  };
-  FileDescriptorResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      FileDescriptorResponse_descriptor_,
-      FileDescriptorResponse::internal_default_instance(),
-      FileDescriptorResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(FileDescriptorResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(FileDescriptorResponse, _internal_metadata_));
-  ExtensionNumberResponse_descriptor_ = file->message_type(4);
-  static const int ExtensionNumberResponse_offsets_[2] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionNumberResponse, base_type_name_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionNumberResponse, extension_number_),
-  };
-  ExtensionNumberResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ExtensionNumberResponse_descriptor_,
-      ExtensionNumberResponse::internal_default_instance(),
-      ExtensionNumberResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(ExtensionNumberResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ExtensionNumberResponse, _internal_metadata_));
-  ListServiceResponse_descriptor_ = file->message_type(5);
-  static const int ListServiceResponse_offsets_[1] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ListServiceResponse, service_),
-  };
-  ListServiceResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ListServiceResponse_descriptor_,
-      ListServiceResponse::internal_default_instance(),
-      ListServiceResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(ListServiceResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ListServiceResponse, _internal_metadata_));
-  ServiceResponse_descriptor_ = file->message_type(6);
-  static const int ServiceResponse_offsets_[1] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServiceResponse, name_),
-  };
-  ServiceResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ServiceResponse_descriptor_,
-      ServiceResponse::internal_default_instance(),
-      ServiceResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(ServiceResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ServiceResponse, _internal_metadata_));
-  ErrorResponse_descriptor_ = file->message_type(7);
-  static const int ErrorResponse_offsets_[2] = {
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ErrorResponse, error_code_),
-    GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ErrorResponse, error_message_),
-  };
-  ErrorResponse_reflection_ =
-    ::google::protobuf::internal::GeneratedMessageReflection::NewGeneratedMessageReflection(
-      ErrorResponse_descriptor_,
-      ErrorResponse::internal_default_instance(),
-      ErrorResponse_offsets_,
-      -1,
-      -1,
-      -1,
-      sizeof(ErrorResponse),
-      GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(ErrorResponse, _internal_metadata_));
-}
-
-namespace {
-
-GOOGLE_PROTOBUF_DECLARE_ONCE(protobuf_AssignDescriptors_once_);
-void protobuf_AssignDescriptorsOnce() {
-  ::google::protobuf::GoogleOnceInit(&protobuf_AssignDescriptors_once_,
-                 &protobuf_AssignDesc_reflection_2eproto);
-}
-
-void protobuf_RegisterTypes(const ::std::string&) GOOGLE_ATTRIBUTE_COLD;
-void protobuf_RegisterTypes(const ::std::string&) {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ServerReflectionRequest_descriptor_, ServerReflectionRequest::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ExtensionRequest_descriptor_, ExtensionRequest::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ServerReflectionResponse_descriptor_, ServerReflectionResponse::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      FileDescriptorResponse_descriptor_, FileDescriptorResponse::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ExtensionNumberResponse_descriptor_, ExtensionNumberResponse::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ListServiceResponse_descriptor_, ListServiceResponse::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ServiceResponse_descriptor_, ServiceResponse::internal_default_instance());
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
-      ErrorResponse_descriptor_, ErrorResponse::internal_default_instance());
-}
-
-}  // namespace
-
-void protobuf_ShutdownFile_reflection_2eproto() {
-  ServerReflectionRequest_default_instance_.Shutdown();
-  delete ServerReflectionRequest_default_oneof_instance_;
-  delete ServerReflectionRequest_reflection_;
-  ExtensionRequest_default_instance_.Shutdown();
-  delete ExtensionRequest_reflection_;
-  ServerReflectionResponse_default_instance_.Shutdown();
-  delete ServerReflectionResponse_default_oneof_instance_;
-  delete ServerReflectionResponse_reflection_;
-  FileDescriptorResponse_default_instance_.Shutdown();
-  delete FileDescriptorResponse_reflection_;
-  ExtensionNumberResponse_default_instance_.Shutdown();
-  delete ExtensionNumberResponse_reflection_;
-  ListServiceResponse_default_instance_.Shutdown();
-  delete ListServiceResponse_reflection_;
-  ServiceResponse_default_instance_.Shutdown();
-  delete ServiceResponse_reflection_;
-  ErrorResponse_default_instance_.Shutdown();
-  delete ErrorResponse_reflection_;
-}
-
-void protobuf_InitDefaults_reflection_2eproto_impl() {
-  GOOGLE_PROTOBUF_VERIFY_VERSION;
-
-  ::google::protobuf::internal::GetEmptyString();
-  ServerReflectionRequest_default_instance_.DefaultConstruct();
-  ServerReflectionRequest_default_oneof_instance_ = new ServerReflectionRequestOneofInstance();
-  ::google::protobuf::internal::GetEmptyString();
-  ExtensionRequest_default_instance_.DefaultConstruct();
-  ::google::protobuf::internal::GetEmptyString();
-  ServerReflectionResponse_default_instance_.DefaultConstruct();
-  ServerReflectionResponse_default_oneof_instance_ = new ServerReflectionResponseOneofInstance();
-  ::google::protobuf::internal::GetEmptyString();
-  FileDescriptorResponse_default_instance_.DefaultConstruct();
-  ::google::protobuf::internal::GetEmptyString();
-  ExtensionNumberResponse_default_instance_.DefaultConstruct();
-  ListServiceResponse_default_instance_.DefaultConstruct();
-  ::google::protobuf::internal::GetEmptyString();
-  ServiceResponse_default_instance_.DefaultConstruct();
-  ::google::protobuf::internal::GetEmptyString();
-  ErrorResponse_default_instance_.DefaultConstruct();
-  ServerReflectionRequest_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ExtensionRequest_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ServerReflectionResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-  FileDescriptorResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ExtensionNumberResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ListServiceResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ServiceResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-  ErrorResponse_default_instance_.get_mutable()->InitAsDefaultInstance();
-}
-
-GOOGLE_PROTOBUF_DECLARE_ONCE(protobuf_InitDefaults_reflection_2eproto_once_);
-void protobuf_InitDefaults_reflection_2eproto() {
-  ::google::protobuf::GoogleOnceInit(&protobuf_InitDefaults_reflection_2eproto_once_,
-                 &protobuf_InitDefaults_reflection_2eproto_impl);
-}
-void protobuf_AddDesc_reflection_2eproto_impl() {
-  GOOGLE_PROTOBUF_VERIFY_VERSION;
-
-  protobuf_InitDefaults_reflection_2eproto();
-  ::google::protobuf::DescriptorPool::InternalAddGeneratedFile(
-    "\n\020reflection.proto\022\027grpc.reflection.v1al"
-    "pha\"\212\002\n\027ServerReflectionRequest\022\014\n\004host\030"
-    "\001 \001(\t\022\032\n\020file_by_filename\030\003 \001(\tH\000\022 \n\026fil"
-    "e_containing_symbol\030\004 \001(\tH\000\022N\n\031file_cont"
-    "aining_extension\030\005 \001(\0132).grpc.reflection"
-    ".v1alpha.ExtensionRequestH\000\022\'\n\035all_exten"
-    "sion_numbers_of_type\030\006 \001(\tH\000\022\027\n\rlist_ser"
-    "vices\030\007 \001(\tH\000B\021\n\017message_request\"E\n\020Exte"
-    "nsionRequest\022\027\n\017containing_type\030\001 \001(\t\022\030\n"
-    "\020extension_number\030\002 \001(\005\"\321\003\n\030ServerReflec"
-    "tionResponse\022\022\n\nvalid_host\030\001 \001(\t\022J\n\020orig"
-    "inal_request\030\002 \001(\01320.grpc.reflection.v1a"
-    "lpha.ServerReflectionRequest\022S\n\030file_des"
-    "criptor_response\030\004 \001(\0132/.grpc.reflection"
-    ".v1alpha.FileDescriptorResponseH\000\022Z\n\036all"
-    "_extension_numbers_response\030\005 \001(\01320.grpc"
-    ".reflection.v1alpha.ExtensionNumberRespo"
-    "nseH\000\022N\n\026list_services_response\030\006 \001(\0132,."
-    "grpc.reflection.v1alpha.ListServiceRespo"
-    "nseH\000\022@\n\016error_response\030\007 \001(\0132&.grpc.ref"
-    "lection.v1alpha.ErrorResponseH\000B\022\n\020messa"
-    "ge_response\"7\n\026FileDescriptorResponse\022\035\n"
-    "\025file_descriptor_proto\030\001 \003(\014\"K\n\027Extensio"
-    "nNumberResponse\022\026\n\016base_type_name\030\001 \001(\t\022"
-    "\030\n\020extension_number\030\002 \003(\005\"P\n\023ListService"
-    "Response\0229\n\007service\030\001 \003(\0132(.grpc.reflect"
-    "ion.v1alpha.ServiceResponse\"\037\n\017ServiceRe"
-    "sponse\022\014\n\004name\030\001 \001(\t\":\n\rErrorResponse\022\022\n"
-    "\nerror_code\030\001 \001(\005\022\025\n\rerror_message\030\002 \001(\t"
-    "2\223\001\n\020ServerReflection\022\177\n\024ServerReflectio"
-    "nInfo\0220.grpc.reflection.v1alpha.ServerRe"
-    "flectionRequest\0321.grpc.reflection.v1alph"
-    "a.ServerReflectionResponse(\0010\001b\006proto3", 1318);
-  ::google::protobuf::MessageFactory::InternalRegisterGeneratedFile(
-    "reflection.proto", &protobuf_RegisterTypes);
-  ::google::protobuf::internal::OnShutdown(&protobuf_ShutdownFile_reflection_2eproto);
-}
-
-GOOGLE_PROTOBUF_DECLARE_ONCE(protobuf_AddDesc_reflection_2eproto_once_);
-void protobuf_AddDesc_reflection_2eproto() {
-  ::google::protobuf::GoogleOnceInit(&protobuf_AddDesc_reflection_2eproto_once_,
-                 &protobuf_AddDesc_reflection_2eproto_impl);
-}
-// Force AddDescriptors() to be called at static initialization time.
-struct StaticDescriptorInitializer_reflection_2eproto {
-  StaticDescriptorInitializer_reflection_2eproto() {
-    protobuf_AddDesc_reflection_2eproto();
-  }
-} static_descriptor_initializer_reflection_2eproto_;
-
-namespace {
-
-static void MergeFromFail(int line) GOOGLE_ATTRIBUTE_COLD GOOGLE_ATTRIBUTE_NORETURN;
-static void MergeFromFail(int line) {
-  ::google::protobuf::internal::MergeFromFail(__FILE__, line);
-}
-
-}  // namespace
-
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ServerReflectionRequest::kHostFieldNumber;
-const int ServerReflectionRequest::kFileByFilenameFieldNumber;
-const int ServerReflectionRequest::kFileContainingSymbolFieldNumber;
-const int ServerReflectionRequest::kFileContainingExtensionFieldNumber;
-const int ServerReflectionRequest::kAllExtensionNumbersOfTypeFieldNumber;
-const int ServerReflectionRequest::kListServicesFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ServerReflectionRequest::ServerReflectionRequest()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ServerReflectionRequest)
-}
-
-void ServerReflectionRequest::InitAsDefaultInstance() {
-  ServerReflectionRequest_default_oneof_instance_->file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  ServerReflectionRequest_default_oneof_instance_->file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  ServerReflectionRequest_default_oneof_instance_->file_containing_extension_ = const_cast< ::grpc::reflection::v1alpha::ExtensionRequest*>(
-      ::grpc::reflection::v1alpha::ExtensionRequest::internal_default_instance());
-  ServerReflectionRequest_default_oneof_instance_->all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  ServerReflectionRequest_default_oneof_instance_->list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-ServerReflectionRequest::ServerReflectionRequest(const ServerReflectionRequest& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ServerReflectionRequest)
-}
-
-void ServerReflectionRequest::SharedCtor() {
-  host_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  clear_has_message_request();
-  _cached_size_ = 0;
-}
-
-ServerReflectionRequest::~ServerReflectionRequest() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ServerReflectionRequest)
-  SharedDtor();
-}
-
-void ServerReflectionRequest::SharedDtor() {
-  host_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  if (has_message_request()) {
-    clear_message_request();
-  }
-}
-
-void ServerReflectionRequest::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ServerReflectionRequest::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ServerReflectionRequest_descriptor_;
-}
-
-const ServerReflectionRequest& ServerReflectionRequest::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ServerReflectionRequest> ServerReflectionRequest_default_instance_;
-
-ServerReflectionRequest* ServerReflectionRequest::New(::google::protobuf::Arena* arena) const {
-  ServerReflectionRequest* n = new ServerReflectionRequest;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ServerReflectionRequest::clear_message_request() {
-// @@protoc_insertion_point(one_of_clear_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  switch (message_request_case()) {
-    case kFileByFilename: {
-      message_request_.file_by_filename_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-      break;
-    }
-    case kFileContainingSymbol: {
-      message_request_.file_containing_symbol_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-      break;
-    }
-    case kFileContainingExtension: {
-      delete message_request_.file_containing_extension_;
-      break;
-    }
-    case kAllExtensionNumbersOfType: {
-      message_request_.all_extension_numbers_of_type_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-      break;
-    }
-    case kListServices: {
-      message_request_.list_services_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-      break;
-    }
-    case MESSAGE_REQUEST_NOT_SET: {
-      break;
-    }
-  }
-  _oneof_case_[0] = MESSAGE_REQUEST_NOT_SET;
-}
-
-
-void ServerReflectionRequest::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  host_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  clear_message_request();
-}
-
-bool ServerReflectionRequest::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional string host = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_host()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->host().data(), this->host().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionRequest.host"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(26)) goto parse_file_by_filename;
-        break;
-      }
-
-      // optional string file_by_filename = 3;
-      case 3: {
-        if (tag == 26) {
-         parse_file_by_filename:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_file_by_filename()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->file_by_filename().data(), this->file_by_filename().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename"));
-        } else {
-          goto handle_unusual;
-        }
-        goto after_list_services;
-        break;
-      }
-
-      // optional string file_containing_symbol = 4;
-      case 4: {
-        if (tag == 34) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_file_containing_symbol()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->file_containing_symbol().data(), this->file_containing_symbol().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol"));
-        } else {
-          goto handle_unusual;
-        }
-        goto after_list_services;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
-      case 5: {
-        if (tag == 42) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_file_containing_extension()));
-        } else {
-          goto handle_unusual;
-        }
-        goto after_list_services;
-        break;
-      }
-
-      // optional string all_extension_numbers_of_type = 6;
-      case 6: {
-        if (tag == 50) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_all_extension_numbers_of_type()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->all_extension_numbers_of_type().data(), this->all_extension_numbers_of_type().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(58)) goto parse_list_services;
-        break;
-      }
-
-      // optional string list_services = 7;
-      case 7: {
-        if (tag == 58) {
-         parse_list_services:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_list_services()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->list_services().data(), this->list_services().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionRequest.list_services"));
-        } else {
-          goto handle_unusual;
-        }
-       after_list_services:
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ServerReflectionRequest)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ServerReflectionRequest)
-  return false;
-#undef DO_
-}
-
-void ServerReflectionRequest::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  // optional string host = 1;
-  if (this->host().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->host().data(), this->host().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.host");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      1, this->host(), output);
-  }
-
-  // optional string file_by_filename = 3;
-  if (has_file_by_filename()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->file_by_filename().data(), this->file_by_filename().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      3, this->file_by_filename(), output);
-  }
-
-  // optional string file_containing_symbol = 4;
-  if (has_file_containing_symbol()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->file_containing_symbol().data(), this->file_containing_symbol().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      4, this->file_containing_symbol(), output);
-  }
-
-  // optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
-  if (has_file_containing_extension()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      5, *message_request_.file_containing_extension_, output);
-  }
-
-  // optional string all_extension_numbers_of_type = 6;
-  if (has_all_extension_numbers_of_type()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->all_extension_numbers_of_type().data(), this->all_extension_numbers_of_type().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      6, this->all_extension_numbers_of_type(), output);
-  }
-
-  // optional string list_services = 7;
-  if (has_list_services()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->list_services().data(), this->list_services().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.list_services");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      7, this->list_services(), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServerReflectionRequest)
-}
-
-::google::protobuf::uint8* ServerReflectionRequest::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  // optional string host = 1;
-  if (this->host().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->host().data(), this->host().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.host");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        1, this->host(), target);
-  }
-
-  // optional string file_by_filename = 3;
-  if (has_file_by_filename()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->file_by_filename().data(), this->file_by_filename().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        3, this->file_by_filename(), target);
-  }
-
-  // optional string file_containing_symbol = 4;
-  if (has_file_containing_symbol()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->file_containing_symbol().data(), this->file_containing_symbol().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        4, this->file_containing_symbol(), target);
-  }
-
-  // optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
-  if (has_file_containing_extension()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        5, *message_request_.file_containing_extension_, false, target);
-  }
-
-  // optional string all_extension_numbers_of_type = 6;
-  if (has_all_extension_numbers_of_type()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->all_extension_numbers_of_type().data(), this->all_extension_numbers_of_type().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        6, this->all_extension_numbers_of_type(), target);
-  }
-
-  // optional string list_services = 7;
-  if (has_list_services()) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->list_services().data(), this->list_services().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionRequest.list_services");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        7, this->list_services(), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ServerReflectionRequest)
-  return target;
-}
-
-size_t ServerReflectionRequest::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  size_t total_size = 0;
-
-  // optional string host = 1;
-  if (this->host().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->host());
-  }
-
-  switch (message_request_case()) {
-    // optional string file_by_filename = 3;
-    case kFileByFilename: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::StringSize(
-          this->file_by_filename());
-      break;
-    }
-    // optional string file_containing_symbol = 4;
-    case kFileContainingSymbol: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::StringSize(
-          this->file_containing_symbol());
-      break;
-    }
-    // optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
-    case kFileContainingExtension: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          *message_request_.file_containing_extension_);
-      break;
-    }
-    // optional string all_extension_numbers_of_type = 6;
-    case kAllExtensionNumbersOfType: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::StringSize(
-          this->all_extension_numbers_of_type());
-      break;
-    }
-    // optional string list_services = 7;
-    case kListServices: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::StringSize(
-          this->list_services());
-      break;
-    }
-    case MESSAGE_REQUEST_NOT_SET: {
-      break;
-    }
-  }
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ServerReflectionRequest::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ServerReflectionRequest* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ServerReflectionRequest>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ServerReflectionRequest)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ServerReflectionRequest)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ServerReflectionRequest::MergeFrom(const ServerReflectionRequest& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ServerReflectionRequest::UnsafeMergeFrom(const ServerReflectionRequest& from) {
-  GOOGLE_DCHECK(&from != this);
-  switch (from.message_request_case()) {
-    case kFileByFilename: {
-      set_file_by_filename(from.file_by_filename());
-      break;
-    }
-    case kFileContainingSymbol: {
-      set_file_containing_symbol(from.file_containing_symbol());
-      break;
-    }
-    case kFileContainingExtension: {
-      mutable_file_containing_extension()->::grpc::reflection::v1alpha::ExtensionRequest::MergeFrom(from.file_containing_extension());
-      break;
-    }
-    case kAllExtensionNumbersOfType: {
-      set_all_extension_numbers_of_type(from.all_extension_numbers_of_type());
-      break;
-    }
-    case kListServices: {
-      set_list_services(from.list_services());
-      break;
-    }
-    case MESSAGE_REQUEST_NOT_SET: {
-      break;
-    }
-  }
-  if (from.host().size() > 0) {
-
-    host_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.host_);
-  }
-}
-
-void ServerReflectionRequest::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ServerReflectionRequest::CopyFrom(const ServerReflectionRequest& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ServerReflectionRequest::IsInitialized() const {
-
-  return true;
-}
-
-void ServerReflectionRequest::Swap(ServerReflectionRequest* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ServerReflectionRequest::InternalSwap(ServerReflectionRequest* other) {
-  host_.Swap(&other->host_);
-  std::swap(message_request_, other->message_request_);
-  std::swap(_oneof_case_[0], other->_oneof_case_[0]);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ServerReflectionRequest::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ServerReflectionRequest_descriptor_;
-  metadata.reflection = ServerReflectionRequest_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ServerReflectionRequest
-
-// optional string host = 1;
-void ServerReflectionRequest::clear_host() {
-  host_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ServerReflectionRequest::host() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-  return host_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServerReflectionRequest::set_host(const ::std::string& value) {
-  
-  host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-}
-void ServerReflectionRequest::set_host(const char* value) {
-  
-  host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-}
-void ServerReflectionRequest::set_host(const char* value, size_t size) {
-  
-  host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-}
-::std::string* ServerReflectionRequest::mutable_host() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-  return host_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionRequest::release_host() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-  
-  return host_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServerReflectionRequest::set_allocated_host(::std::string* host) {
-  if (host != NULL) {
-    
-  } else {
-    
-  }
-  host_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), host);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.host)
-}
-
-// optional string file_by_filename = 3;
-bool ServerReflectionRequest::has_file_by_filename() const {
-  return message_request_case() == kFileByFilename;
-}
-void ServerReflectionRequest::set_has_file_by_filename() {
-  _oneof_case_[0] = kFileByFilename;
-}
-void ServerReflectionRequest::clear_file_by_filename() {
-  if (has_file_by_filename()) {
-    message_request_.file_by_filename_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-    clear_has_message_request();
-  }
-}
-const ::std::string& ServerReflectionRequest::file_by_filename() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-  if (has_file_by_filename()) {
-    return message_request_.file_by_filename_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  return *&::google::protobuf::internal::GetEmptyStringAlreadyInited();
-}
-void ServerReflectionRequest::set_file_by_filename(const ::std::string& value) {
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-  if (!has_file_by_filename()) {
-    clear_message_request();
-    set_has_file_by_filename();
-    message_request_.file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_by_filename_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-}
-void ServerReflectionRequest::set_file_by_filename(const char* value) {
-  if (!has_file_by_filename()) {
-    clear_message_request();
-    set_has_file_by_filename();
-    message_request_.file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_by_filename_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-}
-void ServerReflectionRequest::set_file_by_filename(const char* value, size_t size) {
-  if (!has_file_by_filename()) {
-    clear_message_request();
-    set_has_file_by_filename();
-    message_request_.file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_by_filename_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(
-      reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-}
-::std::string* ServerReflectionRequest::mutable_file_by_filename() {
-  if (!has_file_by_filename()) {
-    clear_message_request();
-    set_has_file_by_filename();
-    message_request_.file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-  return message_request_.file_by_filename_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionRequest::release_file_by_filename() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-  if (has_file_by_filename()) {
-    clear_has_message_request();
-    return message_request_.file_by_filename_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionRequest::set_allocated_file_by_filename(::std::string* file_by_filename) {
-  if (!has_file_by_filename()) {
-    message_request_.file_by_filename_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  clear_message_request();
-  if (file_by_filename != NULL) {
-    set_has_file_by_filename();
-    message_request_.file_by_filename_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-        file_by_filename);
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.file_by_filename)
-}
-
-// optional string file_containing_symbol = 4;
-bool ServerReflectionRequest::has_file_containing_symbol() const {
-  return message_request_case() == kFileContainingSymbol;
-}
-void ServerReflectionRequest::set_has_file_containing_symbol() {
-  _oneof_case_[0] = kFileContainingSymbol;
-}
-void ServerReflectionRequest::clear_file_containing_symbol() {
-  if (has_file_containing_symbol()) {
-    message_request_.file_containing_symbol_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-    clear_has_message_request();
-  }
-}
-const ::std::string& ServerReflectionRequest::file_containing_symbol() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-  if (has_file_containing_symbol()) {
-    return message_request_.file_containing_symbol_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  return *&::google::protobuf::internal::GetEmptyStringAlreadyInited();
-}
-void ServerReflectionRequest::set_file_containing_symbol(const ::std::string& value) {
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-  if (!has_file_containing_symbol()) {
-    clear_message_request();
-    set_has_file_containing_symbol();
-    message_request_.file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_containing_symbol_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-}
-void ServerReflectionRequest::set_file_containing_symbol(const char* value) {
-  if (!has_file_containing_symbol()) {
-    clear_message_request();
-    set_has_file_containing_symbol();
-    message_request_.file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_containing_symbol_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-}
-void ServerReflectionRequest::set_file_containing_symbol(const char* value, size_t size) {
-  if (!has_file_containing_symbol()) {
-    clear_message_request();
-    set_has_file_containing_symbol();
-    message_request_.file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.file_containing_symbol_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(
-      reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-}
-::std::string* ServerReflectionRequest::mutable_file_containing_symbol() {
-  if (!has_file_containing_symbol()) {
-    clear_message_request();
-    set_has_file_containing_symbol();
-    message_request_.file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-  return message_request_.file_containing_symbol_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionRequest::release_file_containing_symbol() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-  if (has_file_containing_symbol()) {
-    clear_has_message_request();
-    return message_request_.file_containing_symbol_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionRequest::set_allocated_file_containing_symbol(::std::string* file_containing_symbol) {
-  if (!has_file_containing_symbol()) {
-    message_request_.file_containing_symbol_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  clear_message_request();
-  if (file_containing_symbol != NULL) {
-    set_has_file_containing_symbol();
-    message_request_.file_containing_symbol_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-        file_containing_symbol);
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_symbol)
-}
-
-// optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
-bool ServerReflectionRequest::has_file_containing_extension() const {
-  return message_request_case() == kFileContainingExtension;
-}
-void ServerReflectionRequest::set_has_file_containing_extension() {
-  _oneof_case_[0] = kFileContainingExtension;
-}
-void ServerReflectionRequest::clear_file_containing_extension() {
-  if (has_file_containing_extension()) {
-    delete message_request_.file_containing_extension_;
-    clear_has_message_request();
-  }
-}
- const ::grpc::reflection::v1alpha::ExtensionRequest& ServerReflectionRequest::file_containing_extension() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_extension)
-  return has_file_containing_extension()
-      ? *message_request_.file_containing_extension_
-      : ::grpc::reflection::v1alpha::ExtensionRequest::default_instance();
-}
-::grpc::reflection::v1alpha::ExtensionRequest* ServerReflectionRequest::mutable_file_containing_extension() {
-  if (!has_file_containing_extension()) {
-    clear_message_request();
-    set_has_file_containing_extension();
-    message_request_.file_containing_extension_ = new ::grpc::reflection::v1alpha::ExtensionRequest;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_extension)
-  return message_request_.file_containing_extension_;
-}
-::grpc::reflection::v1alpha::ExtensionRequest* ServerReflectionRequest::release_file_containing_extension() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_extension)
-  if (has_file_containing_extension()) {
-    clear_has_message_request();
-    ::grpc::reflection::v1alpha::ExtensionRequest* temp = message_request_.file_containing_extension_;
-    message_request_.file_containing_extension_ = NULL;
-    return temp;
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionRequest::set_allocated_file_containing_extension(::grpc::reflection::v1alpha::ExtensionRequest* file_containing_extension) {
-  clear_message_request();
-  if (file_containing_extension) {
-    set_has_file_containing_extension();
-    message_request_.file_containing_extension_ = file_containing_extension;
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.file_containing_extension)
-}
-
-// optional string all_extension_numbers_of_type = 6;
-bool ServerReflectionRequest::has_all_extension_numbers_of_type() const {
-  return message_request_case() == kAllExtensionNumbersOfType;
-}
-void ServerReflectionRequest::set_has_all_extension_numbers_of_type() {
-  _oneof_case_[0] = kAllExtensionNumbersOfType;
-}
-void ServerReflectionRequest::clear_all_extension_numbers_of_type() {
-  if (has_all_extension_numbers_of_type()) {
-    message_request_.all_extension_numbers_of_type_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-    clear_has_message_request();
-  }
-}
-const ::std::string& ServerReflectionRequest::all_extension_numbers_of_type() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-  if (has_all_extension_numbers_of_type()) {
-    return message_request_.all_extension_numbers_of_type_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  return *&::google::protobuf::internal::GetEmptyStringAlreadyInited();
-}
-void ServerReflectionRequest::set_all_extension_numbers_of_type(const ::std::string& value) {
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-  if (!has_all_extension_numbers_of_type()) {
-    clear_message_request();
-    set_has_all_extension_numbers_of_type();
-    message_request_.all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.all_extension_numbers_of_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-}
-void ServerReflectionRequest::set_all_extension_numbers_of_type(const char* value) {
-  if (!has_all_extension_numbers_of_type()) {
-    clear_message_request();
-    set_has_all_extension_numbers_of_type();
-    message_request_.all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.all_extension_numbers_of_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-}
-void ServerReflectionRequest::set_all_extension_numbers_of_type(const char* value, size_t size) {
-  if (!has_all_extension_numbers_of_type()) {
-    clear_message_request();
-    set_has_all_extension_numbers_of_type();
-    message_request_.all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.all_extension_numbers_of_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(
-      reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-}
-::std::string* ServerReflectionRequest::mutable_all_extension_numbers_of_type() {
-  if (!has_all_extension_numbers_of_type()) {
-    clear_message_request();
-    set_has_all_extension_numbers_of_type();
-    message_request_.all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-  return message_request_.all_extension_numbers_of_type_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionRequest::release_all_extension_numbers_of_type() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-  if (has_all_extension_numbers_of_type()) {
-    clear_has_message_request();
-    return message_request_.all_extension_numbers_of_type_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionRequest::set_allocated_all_extension_numbers_of_type(::std::string* all_extension_numbers_of_type) {
-  if (!has_all_extension_numbers_of_type()) {
-    message_request_.all_extension_numbers_of_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  clear_message_request();
-  if (all_extension_numbers_of_type != NULL) {
-    set_has_all_extension_numbers_of_type();
-    message_request_.all_extension_numbers_of_type_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-        all_extension_numbers_of_type);
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.all_extension_numbers_of_type)
-}
-
-// optional string list_services = 7;
-bool ServerReflectionRequest::has_list_services() const {
-  return message_request_case() == kListServices;
-}
-void ServerReflectionRequest::set_has_list_services() {
-  _oneof_case_[0] = kListServices;
-}
-void ServerReflectionRequest::clear_list_services() {
-  if (has_list_services()) {
-    message_request_.list_services_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-    clear_has_message_request();
-  }
-}
-const ::std::string& ServerReflectionRequest::list_services() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-  if (has_list_services()) {
-    return message_request_.list_services_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  return *&::google::protobuf::internal::GetEmptyStringAlreadyInited();
-}
-void ServerReflectionRequest::set_list_services(const ::std::string& value) {
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-  if (!has_list_services()) {
-    clear_message_request();
-    set_has_list_services();
-    message_request_.list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.list_services_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-}
-void ServerReflectionRequest::set_list_services(const char* value) {
-  if (!has_list_services()) {
-    clear_message_request();
-    set_has_list_services();
-    message_request_.list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.list_services_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-}
-void ServerReflectionRequest::set_list_services(const char* value, size_t size) {
-  if (!has_list_services()) {
-    clear_message_request();
-    set_has_list_services();
-    message_request_.list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  message_request_.list_services_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(
-      reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-}
-::std::string* ServerReflectionRequest::mutable_list_services() {
-  if (!has_list_services()) {
-    clear_message_request();
-    set_has_list_services();
-    message_request_.list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-  return message_request_.list_services_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionRequest::release_list_services() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-  if (has_list_services()) {
-    clear_has_message_request();
-    return message_request_.list_services_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionRequest::set_allocated_list_services(::std::string* list_services) {
-  if (!has_list_services()) {
-    message_request_.list_services_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  }
-  clear_message_request();
-  if (list_services != NULL) {
-    set_has_list_services();
-    message_request_.list_services_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-        list_services);
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionRequest.list_services)
-}
-
-bool ServerReflectionRequest::has_message_request() const {
-  return message_request_case() != MESSAGE_REQUEST_NOT_SET;
-}
-void ServerReflectionRequest::clear_has_message_request() {
-  _oneof_case_[0] = MESSAGE_REQUEST_NOT_SET;
-}
-ServerReflectionRequest::MessageRequestCase ServerReflectionRequest::message_request_case() const {
-  return ServerReflectionRequest::MessageRequestCase(_oneof_case_[0]);
-}
-inline const ServerReflectionRequest* ServerReflectionRequest::internal_default_instance() {
-  return &ServerReflectionRequest_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ExtensionRequest::kContainingTypeFieldNumber;
-const int ExtensionRequest::kExtensionNumberFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ExtensionRequest::ExtensionRequest()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ExtensionRequest)
-}
-
-void ExtensionRequest::InitAsDefaultInstance() {
-}
-
-ExtensionRequest::ExtensionRequest(const ExtensionRequest& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ExtensionRequest)
-}
-
-void ExtensionRequest::SharedCtor() {
-  containing_type_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  extension_number_ = 0;
-  _cached_size_ = 0;
-}
-
-ExtensionRequest::~ExtensionRequest() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ExtensionRequest)
-  SharedDtor();
-}
-
-void ExtensionRequest::SharedDtor() {
-  containing_type_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-void ExtensionRequest::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ExtensionRequest::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ExtensionRequest_descriptor_;
-}
-
-const ExtensionRequest& ExtensionRequest::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ExtensionRequest> ExtensionRequest_default_instance_;
-
-ExtensionRequest* ExtensionRequest::New(::google::protobuf::Arena* arena) const {
-  ExtensionRequest* n = new ExtensionRequest;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ExtensionRequest::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ExtensionRequest)
-  containing_type_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  extension_number_ = 0;
-}
-
-bool ExtensionRequest::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ExtensionRequest)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional string containing_type = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_containing_type()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->containing_type().data(), this->containing_type().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ExtensionRequest.containing_type"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(16)) goto parse_extension_number;
-        break;
-      }
-
-      // optional int32 extension_number = 2;
-      case 2: {
-        if (tag == 16) {
-         parse_extension_number:
-
-          DO_((::google::protobuf::internal::WireFormatLite::ReadPrimitive<
-                   ::google::protobuf::int32, ::google::protobuf::internal::WireFormatLite::TYPE_INT32>(
-                 input, &extension_number_)));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ExtensionRequest)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ExtensionRequest)
-  return false;
-#undef DO_
-}
-
-void ExtensionRequest::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ExtensionRequest)
-  // optional string containing_type = 1;
-  if (this->containing_type().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->containing_type().data(), this->containing_type().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ExtensionRequest.containing_type");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      1, this->containing_type(), output);
-  }
-
-  // optional int32 extension_number = 2;
-  if (this->extension_number() != 0) {
-    ::google::protobuf::internal::WireFormatLite::WriteInt32(2, this->extension_number(), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ExtensionRequest)
-}
-
-::google::protobuf::uint8* ExtensionRequest::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ExtensionRequest)
-  // optional string containing_type = 1;
-  if (this->containing_type().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->containing_type().data(), this->containing_type().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ExtensionRequest.containing_type");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        1, this->containing_type(), target);
-  }
-
-  // optional int32 extension_number = 2;
-  if (this->extension_number() != 0) {
-    target = ::google::protobuf::internal::WireFormatLite::WriteInt32ToArray(2, this->extension_number(), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ExtensionRequest)
-  return target;
-}
-
-size_t ExtensionRequest::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ExtensionRequest)
-  size_t total_size = 0;
-
-  // optional string containing_type = 1;
-  if (this->containing_type().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->containing_type());
-  }
-
-  // optional int32 extension_number = 2;
-  if (this->extension_number() != 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::Int32Size(
-        this->extension_number());
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ExtensionRequest::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ExtensionRequest* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ExtensionRequest>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ExtensionRequest)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ExtensionRequest)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ExtensionRequest::MergeFrom(const ExtensionRequest& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ExtensionRequest::UnsafeMergeFrom(const ExtensionRequest& from) {
-  GOOGLE_DCHECK(&from != this);
-  if (from.containing_type().size() > 0) {
-
-    containing_type_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.containing_type_);
-  }
-  if (from.extension_number() != 0) {
-    set_extension_number(from.extension_number());
-  }
-}
-
-void ExtensionRequest::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ExtensionRequest::CopyFrom(const ExtensionRequest& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ExtensionRequest::IsInitialized() const {
-
-  return true;
-}
-
-void ExtensionRequest::Swap(ExtensionRequest* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ExtensionRequest::InternalSwap(ExtensionRequest* other) {
-  containing_type_.Swap(&other->containing_type_);
-  std::swap(extension_number_, other->extension_number_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ExtensionRequest::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ExtensionRequest_descriptor_;
-  metadata.reflection = ExtensionRequest_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ExtensionRequest
-
-// optional string containing_type = 1;
-void ExtensionRequest::clear_containing_type() {
-  containing_type_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ExtensionRequest::containing_type() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-  return containing_type_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ExtensionRequest::set_containing_type(const ::std::string& value) {
-  
-  containing_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-}
-void ExtensionRequest::set_containing_type(const char* value) {
-  
-  containing_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-}
-void ExtensionRequest::set_containing_type(const char* value, size_t size) {
-  
-  containing_type_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-}
-::std::string* ExtensionRequest::mutable_containing_type() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-  return containing_type_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ExtensionRequest::release_containing_type() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-  
-  return containing_type_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ExtensionRequest::set_allocated_containing_type(::std::string* containing_type) {
-  if (containing_type != NULL) {
-    
-  } else {
-    
-  }
-  containing_type_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), containing_type);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ExtensionRequest.containing_type)
-}
-
-// optional int32 extension_number = 2;
-void ExtensionRequest::clear_extension_number() {
-  extension_number_ = 0;
-}
-::google::protobuf::int32 ExtensionRequest::extension_number() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ExtensionRequest.extension_number)
-  return extension_number_;
-}
-void ExtensionRequest::set_extension_number(::google::protobuf::int32 value) {
-  
-  extension_number_ = value;
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ExtensionRequest.extension_number)
-}
-
-inline const ExtensionRequest* ExtensionRequest::internal_default_instance() {
-  return &ExtensionRequest_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ServerReflectionResponse::kValidHostFieldNumber;
-const int ServerReflectionResponse::kOriginalRequestFieldNumber;
-const int ServerReflectionResponse::kFileDescriptorResponseFieldNumber;
-const int ServerReflectionResponse::kAllExtensionNumbersResponseFieldNumber;
-const int ServerReflectionResponse::kListServicesResponseFieldNumber;
-const int ServerReflectionResponse::kErrorResponseFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ServerReflectionResponse::ServerReflectionResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ServerReflectionResponse)
-}
-
-void ServerReflectionResponse::InitAsDefaultInstance() {
-  original_request_ = const_cast< ::grpc::reflection::v1alpha::ServerReflectionRequest*>(
-      ::grpc::reflection::v1alpha::ServerReflectionRequest::internal_default_instance());
-  ServerReflectionResponse_default_oneof_instance_->file_descriptor_response_ = const_cast< ::grpc::reflection::v1alpha::FileDescriptorResponse*>(
-      ::grpc::reflection::v1alpha::FileDescriptorResponse::internal_default_instance());
-  ServerReflectionResponse_default_oneof_instance_->all_extension_numbers_response_ = const_cast< ::grpc::reflection::v1alpha::ExtensionNumberResponse*>(
-      ::grpc::reflection::v1alpha::ExtensionNumberResponse::internal_default_instance());
-  ServerReflectionResponse_default_oneof_instance_->list_services_response_ = const_cast< ::grpc::reflection::v1alpha::ListServiceResponse*>(
-      ::grpc::reflection::v1alpha::ListServiceResponse::internal_default_instance());
-  ServerReflectionResponse_default_oneof_instance_->error_response_ = const_cast< ::grpc::reflection::v1alpha::ErrorResponse*>(
-      ::grpc::reflection::v1alpha::ErrorResponse::internal_default_instance());
-}
-
-ServerReflectionResponse::ServerReflectionResponse(const ServerReflectionResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ServerReflectionResponse)
-}
-
-void ServerReflectionResponse::SharedCtor() {
-  valid_host_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  original_request_ = NULL;
-  clear_has_message_response();
-  _cached_size_ = 0;
-}
-
-ServerReflectionResponse::~ServerReflectionResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ServerReflectionResponse)
-  SharedDtor();
-}
-
-void ServerReflectionResponse::SharedDtor() {
-  valid_host_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  if (has_message_response()) {
-    clear_message_response();
-  }
-  if (this != &ServerReflectionResponse_default_instance_.get()) {
-    delete original_request_;
-  }
-}
-
-void ServerReflectionResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ServerReflectionResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ServerReflectionResponse_descriptor_;
-}
-
-const ServerReflectionResponse& ServerReflectionResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ServerReflectionResponse> ServerReflectionResponse_default_instance_;
-
-ServerReflectionResponse* ServerReflectionResponse::New(::google::protobuf::Arena* arena) const {
-  ServerReflectionResponse* n = new ServerReflectionResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ServerReflectionResponse::clear_message_response() {
-// @@protoc_insertion_point(one_of_clear_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  switch (message_response_case()) {
-    case kFileDescriptorResponse: {
-      delete message_response_.file_descriptor_response_;
-      break;
-    }
-    case kAllExtensionNumbersResponse: {
-      delete message_response_.all_extension_numbers_response_;
-      break;
-    }
-    case kListServicesResponse: {
-      delete message_response_.list_services_response_;
-      break;
-    }
-    case kErrorResponse: {
-      delete message_response_.error_response_;
-      break;
-    }
-    case MESSAGE_RESPONSE_NOT_SET: {
-      break;
-    }
-  }
-  _oneof_case_[0] = MESSAGE_RESPONSE_NOT_SET;
-}
-
-
-void ServerReflectionResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  valid_host_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  if (GetArenaNoVirtual() == NULL && original_request_ != NULL) delete original_request_;
-  original_request_ = NULL;
-  clear_message_response();
-}
-
-bool ServerReflectionResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional string valid_host = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_valid_host()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->valid_host().data(), this->valid_host().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServerReflectionResponse.valid_host"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(18)) goto parse_original_request;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
-      case 2: {
-        if (tag == 18) {
-         parse_original_request:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_original_request()));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(34)) goto parse_file_descriptor_response;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
-      case 4: {
-        if (tag == 34) {
-         parse_file_descriptor_response:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_file_descriptor_response()));
-        } else {
-          goto handle_unusual;
-        }
-        goto after_error_response;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
-      case 5: {
-        if (tag == 42) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_all_extension_numbers_response()));
-        } else {
-          goto handle_unusual;
-        }
-        goto after_error_response;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
-      case 6: {
-        if (tag == 50) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_list_services_response()));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(58)) goto parse_error_response;
-        break;
-      }
-
-      // optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
-      case 7: {
-        if (tag == 58) {
-         parse_error_response:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(
-               input, mutable_error_response()));
-        } else {
-          goto handle_unusual;
-        }
-       after_error_response:
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ServerReflectionResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ServerReflectionResponse)
-  return false;
-#undef DO_
-}
-
-void ServerReflectionResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  // optional string valid_host = 1;
-  if (this->valid_host().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->valid_host().data(), this->valid_host().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionResponse.valid_host");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      1, this->valid_host(), output);
-  }
-
-  // optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
-  if (this->has_original_request()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      2, *this->original_request_, output);
-  }
-
-  // optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
-  if (has_file_descriptor_response()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      4, *message_response_.file_descriptor_response_, output);
-  }
-
-  // optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
-  if (has_all_extension_numbers_response()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      5, *message_response_.all_extension_numbers_response_, output);
-  }
-
-  // optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
-  if (has_list_services_response()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      6, *message_response_.list_services_response_, output);
-  }
-
-  // optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
-  if (has_error_response()) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      7, *message_response_.error_response_, output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServerReflectionResponse)
-}
-
-::google::protobuf::uint8* ServerReflectionResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  // optional string valid_host = 1;
-  if (this->valid_host().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->valid_host().data(), this->valid_host().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServerReflectionResponse.valid_host");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        1, this->valid_host(), target);
-  }
-
-  // optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
-  if (this->has_original_request()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        2, *this->original_request_, false, target);
-  }
-
-  // optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
-  if (has_file_descriptor_response()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        4, *message_response_.file_descriptor_response_, false, target);
-  }
-
-  // optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
-  if (has_all_extension_numbers_response()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        5, *message_response_.all_extension_numbers_response_, false, target);
-  }
-
-  // optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
-  if (has_list_services_response()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        6, *message_response_.list_services_response_, false, target);
-  }
-
-  // optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
-  if (has_error_response()) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        7, *message_response_.error_response_, false, target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ServerReflectionResponse)
-  return target;
-}
-
-size_t ServerReflectionResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  size_t total_size = 0;
-
-  // optional string valid_host = 1;
-  if (this->valid_host().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->valid_host());
-  }
-
-  // optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
-  if (this->has_original_request()) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-        *this->original_request_);
-  }
-
-  switch (message_response_case()) {
-    // optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
-    case kFileDescriptorResponse: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          *message_response_.file_descriptor_response_);
-      break;
-    }
-    // optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
-    case kAllExtensionNumbersResponse: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          *message_response_.all_extension_numbers_response_);
-      break;
-    }
-    // optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
-    case kListServicesResponse: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          *message_response_.list_services_response_);
-      break;
-    }
-    // optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
-    case kErrorResponse: {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          *message_response_.error_response_);
-      break;
-    }
-    case MESSAGE_RESPONSE_NOT_SET: {
-      break;
-    }
-  }
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ServerReflectionResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ServerReflectionResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ServerReflectionResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ServerReflectionResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ServerReflectionResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ServerReflectionResponse::MergeFrom(const ServerReflectionResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ServerReflectionResponse::UnsafeMergeFrom(const ServerReflectionResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  switch (from.message_response_case()) {
-    case kFileDescriptorResponse: {
-      mutable_file_descriptor_response()->::grpc::reflection::v1alpha::FileDescriptorResponse::MergeFrom(from.file_descriptor_response());
-      break;
-    }
-    case kAllExtensionNumbersResponse: {
-      mutable_all_extension_numbers_response()->::grpc::reflection::v1alpha::ExtensionNumberResponse::MergeFrom(from.all_extension_numbers_response());
-      break;
-    }
-    case kListServicesResponse: {
-      mutable_list_services_response()->::grpc::reflection::v1alpha::ListServiceResponse::MergeFrom(from.list_services_response());
-      break;
-    }
-    case kErrorResponse: {
-      mutable_error_response()->::grpc::reflection::v1alpha::ErrorResponse::MergeFrom(from.error_response());
-      break;
-    }
-    case MESSAGE_RESPONSE_NOT_SET: {
-      break;
-    }
-  }
-  if (from.valid_host().size() > 0) {
-
-    valid_host_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.valid_host_);
-  }
-  if (from.has_original_request()) {
-    mutable_original_request()->::grpc::reflection::v1alpha::ServerReflectionRequest::MergeFrom(from.original_request());
-  }
-}
-
-void ServerReflectionResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ServerReflectionResponse::CopyFrom(const ServerReflectionResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ServerReflectionResponse::IsInitialized() const {
-
-  return true;
-}
-
-void ServerReflectionResponse::Swap(ServerReflectionResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ServerReflectionResponse::InternalSwap(ServerReflectionResponse* other) {
-  valid_host_.Swap(&other->valid_host_);
-  std::swap(original_request_, other->original_request_);
-  std::swap(message_response_, other->message_response_);
-  std::swap(_oneof_case_[0], other->_oneof_case_[0]);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ServerReflectionResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ServerReflectionResponse_descriptor_;
-  metadata.reflection = ServerReflectionResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ServerReflectionResponse
-
-// optional string valid_host = 1;
-void ServerReflectionResponse::clear_valid_host() {
-  valid_host_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ServerReflectionResponse::valid_host() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-  return valid_host_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServerReflectionResponse::set_valid_host(const ::std::string& value) {
-  
-  valid_host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-}
-void ServerReflectionResponse::set_valid_host(const char* value) {
-  
-  valid_host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-}
-void ServerReflectionResponse::set_valid_host(const char* value, size_t size) {
-  
-  valid_host_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-}
-::std::string* ServerReflectionResponse::mutable_valid_host() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-  return valid_host_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServerReflectionResponse::release_valid_host() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-  
-  return valid_host_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServerReflectionResponse::set_allocated_valid_host(::std::string* valid_host) {
-  if (valid_host != NULL) {
-    
-  } else {
-    
-  }
-  valid_host_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), valid_host);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.valid_host)
-}
-
-// optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
-bool ServerReflectionResponse::has_original_request() const {
-  return this != internal_default_instance() && original_request_ != NULL;
-}
-void ServerReflectionResponse::clear_original_request() {
-  if (GetArenaNoVirtual() == NULL && original_request_ != NULL) delete original_request_;
-  original_request_ = NULL;
-}
-const ::grpc::reflection::v1alpha::ServerReflectionRequest& ServerReflectionResponse::original_request() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.original_request)
-  return original_request_ != NULL ? *original_request_
-                         : *::grpc::reflection::v1alpha::ServerReflectionRequest::internal_default_instance();
-}
-::grpc::reflection::v1alpha::ServerReflectionRequest* ServerReflectionResponse::mutable_original_request() {
-  
-  if (original_request_ == NULL) {
-    original_request_ = new ::grpc::reflection::v1alpha::ServerReflectionRequest;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.original_request)
-  return original_request_;
-}
-::grpc::reflection::v1alpha::ServerReflectionRequest* ServerReflectionResponse::release_original_request() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.original_request)
-  
-  ::grpc::reflection::v1alpha::ServerReflectionRequest* temp = original_request_;
-  original_request_ = NULL;
-  return temp;
-}
-void ServerReflectionResponse::set_allocated_original_request(::grpc::reflection::v1alpha::ServerReflectionRequest* original_request) {
-  delete original_request_;
-  original_request_ = original_request;
-  if (original_request) {
-    
-  } else {
-    
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.original_request)
-}
-
-// optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
-bool ServerReflectionResponse::has_file_descriptor_response() const {
-  return message_response_case() == kFileDescriptorResponse;
-}
-void ServerReflectionResponse::set_has_file_descriptor_response() {
-  _oneof_case_[0] = kFileDescriptorResponse;
-}
-void ServerReflectionResponse::clear_file_descriptor_response() {
-  if (has_file_descriptor_response()) {
-    delete message_response_.file_descriptor_response_;
-    clear_has_message_response();
-  }
-}
- const ::grpc::reflection::v1alpha::FileDescriptorResponse& ServerReflectionResponse::file_descriptor_response() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.file_descriptor_response)
-  return has_file_descriptor_response()
-      ? *message_response_.file_descriptor_response_
-      : ::grpc::reflection::v1alpha::FileDescriptorResponse::default_instance();
-}
-::grpc::reflection::v1alpha::FileDescriptorResponse* ServerReflectionResponse::mutable_file_descriptor_response() {
-  if (!has_file_descriptor_response()) {
-    clear_message_response();
-    set_has_file_descriptor_response();
-    message_response_.file_descriptor_response_ = new ::grpc::reflection::v1alpha::FileDescriptorResponse;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.file_descriptor_response)
-  return message_response_.file_descriptor_response_;
-}
-::grpc::reflection::v1alpha::FileDescriptorResponse* ServerReflectionResponse::release_file_descriptor_response() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.file_descriptor_response)
-  if (has_file_descriptor_response()) {
-    clear_has_message_response();
-    ::grpc::reflection::v1alpha::FileDescriptorResponse* temp = message_response_.file_descriptor_response_;
-    message_response_.file_descriptor_response_ = NULL;
-    return temp;
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionResponse::set_allocated_file_descriptor_response(::grpc::reflection::v1alpha::FileDescriptorResponse* file_descriptor_response) {
-  clear_message_response();
-  if (file_descriptor_response) {
-    set_has_file_descriptor_response();
-    message_response_.file_descriptor_response_ = file_descriptor_response;
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.file_descriptor_response)
-}
-
-// optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
-bool ServerReflectionResponse::has_all_extension_numbers_response() const {
-  return message_response_case() == kAllExtensionNumbersResponse;
-}
-void ServerReflectionResponse::set_has_all_extension_numbers_response() {
-  _oneof_case_[0] = kAllExtensionNumbersResponse;
-}
-void ServerReflectionResponse::clear_all_extension_numbers_response() {
-  if (has_all_extension_numbers_response()) {
-    delete message_response_.all_extension_numbers_response_;
-    clear_has_message_response();
-  }
-}
- const ::grpc::reflection::v1alpha::ExtensionNumberResponse& ServerReflectionResponse::all_extension_numbers_response() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.all_extension_numbers_response)
-  return has_all_extension_numbers_response()
-      ? *message_response_.all_extension_numbers_response_
-      : ::grpc::reflection::v1alpha::ExtensionNumberResponse::default_instance();
-}
-::grpc::reflection::v1alpha::ExtensionNumberResponse* ServerReflectionResponse::mutable_all_extension_numbers_response() {
-  if (!has_all_extension_numbers_response()) {
-    clear_message_response();
-    set_has_all_extension_numbers_response();
-    message_response_.all_extension_numbers_response_ = new ::grpc::reflection::v1alpha::ExtensionNumberResponse;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.all_extension_numbers_response)
-  return message_response_.all_extension_numbers_response_;
-}
-::grpc::reflection::v1alpha::ExtensionNumberResponse* ServerReflectionResponse::release_all_extension_numbers_response() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.all_extension_numbers_response)
-  if (has_all_extension_numbers_response()) {
-    clear_has_message_response();
-    ::grpc::reflection::v1alpha::ExtensionNumberResponse* temp = message_response_.all_extension_numbers_response_;
-    message_response_.all_extension_numbers_response_ = NULL;
-    return temp;
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionResponse::set_allocated_all_extension_numbers_response(::grpc::reflection::v1alpha::ExtensionNumberResponse* all_extension_numbers_response) {
-  clear_message_response();
-  if (all_extension_numbers_response) {
-    set_has_all_extension_numbers_response();
-    message_response_.all_extension_numbers_response_ = all_extension_numbers_response;
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.all_extension_numbers_response)
-}
-
-// optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
-bool ServerReflectionResponse::has_list_services_response() const {
-  return message_response_case() == kListServicesResponse;
-}
-void ServerReflectionResponse::set_has_list_services_response() {
-  _oneof_case_[0] = kListServicesResponse;
-}
-void ServerReflectionResponse::clear_list_services_response() {
-  if (has_list_services_response()) {
-    delete message_response_.list_services_response_;
-    clear_has_message_response();
-  }
-}
- const ::grpc::reflection::v1alpha::ListServiceResponse& ServerReflectionResponse::list_services_response() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.list_services_response)
-  return has_list_services_response()
-      ? *message_response_.list_services_response_
-      : ::grpc::reflection::v1alpha::ListServiceResponse::default_instance();
-}
-::grpc::reflection::v1alpha::ListServiceResponse* ServerReflectionResponse::mutable_list_services_response() {
-  if (!has_list_services_response()) {
-    clear_message_response();
-    set_has_list_services_response();
-    message_response_.list_services_response_ = new ::grpc::reflection::v1alpha::ListServiceResponse;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.list_services_response)
-  return message_response_.list_services_response_;
-}
-::grpc::reflection::v1alpha::ListServiceResponse* ServerReflectionResponse::release_list_services_response() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.list_services_response)
-  if (has_list_services_response()) {
-    clear_has_message_response();
-    ::grpc::reflection::v1alpha::ListServiceResponse* temp = message_response_.list_services_response_;
-    message_response_.list_services_response_ = NULL;
-    return temp;
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionResponse::set_allocated_list_services_response(::grpc::reflection::v1alpha::ListServiceResponse* list_services_response) {
-  clear_message_response();
-  if (list_services_response) {
-    set_has_list_services_response();
-    message_response_.list_services_response_ = list_services_response;
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.list_services_response)
-}
-
-// optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
-bool ServerReflectionResponse::has_error_response() const {
-  return message_response_case() == kErrorResponse;
-}
-void ServerReflectionResponse::set_has_error_response() {
-  _oneof_case_[0] = kErrorResponse;
-}
-void ServerReflectionResponse::clear_error_response() {
-  if (has_error_response()) {
-    delete message_response_.error_response_;
-    clear_has_message_response();
-  }
-}
- const ::grpc::reflection::v1alpha::ErrorResponse& ServerReflectionResponse::error_response() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServerReflectionResponse.error_response)
-  return has_error_response()
-      ? *message_response_.error_response_
-      : ::grpc::reflection::v1alpha::ErrorResponse::default_instance();
-}
-::grpc::reflection::v1alpha::ErrorResponse* ServerReflectionResponse::mutable_error_response() {
-  if (!has_error_response()) {
-    clear_message_response();
-    set_has_error_response();
-    message_response_.error_response_ = new ::grpc::reflection::v1alpha::ErrorResponse;
-  }
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServerReflectionResponse.error_response)
-  return message_response_.error_response_;
-}
-::grpc::reflection::v1alpha::ErrorResponse* ServerReflectionResponse::release_error_response() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServerReflectionResponse.error_response)
-  if (has_error_response()) {
-    clear_has_message_response();
-    ::grpc::reflection::v1alpha::ErrorResponse* temp = message_response_.error_response_;
-    message_response_.error_response_ = NULL;
-    return temp;
-  } else {
-    return NULL;
-  }
-}
-void ServerReflectionResponse::set_allocated_error_response(::grpc::reflection::v1alpha::ErrorResponse* error_response) {
-  clear_message_response();
-  if (error_response) {
-    set_has_error_response();
-    message_response_.error_response_ = error_response;
-  }
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServerReflectionResponse.error_response)
-}
-
-bool ServerReflectionResponse::has_message_response() const {
-  return message_response_case() != MESSAGE_RESPONSE_NOT_SET;
-}
-void ServerReflectionResponse::clear_has_message_response() {
-  _oneof_case_[0] = MESSAGE_RESPONSE_NOT_SET;
-}
-ServerReflectionResponse::MessageResponseCase ServerReflectionResponse::message_response_case() const {
-  return ServerReflectionResponse::MessageResponseCase(_oneof_case_[0]);
-}
-inline const ServerReflectionResponse* ServerReflectionResponse::internal_default_instance() {
-  return &ServerReflectionResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int FileDescriptorResponse::kFileDescriptorProtoFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-FileDescriptorResponse::FileDescriptorResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.FileDescriptorResponse)
-}
-
-void FileDescriptorResponse::InitAsDefaultInstance() {
-}
-
-FileDescriptorResponse::FileDescriptorResponse(const FileDescriptorResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.FileDescriptorResponse)
-}
-
-void FileDescriptorResponse::SharedCtor() {
-  _cached_size_ = 0;
-}
-
-FileDescriptorResponse::~FileDescriptorResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.FileDescriptorResponse)
-  SharedDtor();
-}
-
-void FileDescriptorResponse::SharedDtor() {
-}
-
-void FileDescriptorResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* FileDescriptorResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return FileDescriptorResponse_descriptor_;
-}
-
-const FileDescriptorResponse& FileDescriptorResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<FileDescriptorResponse> FileDescriptorResponse_default_instance_;
-
-FileDescriptorResponse* FileDescriptorResponse::New(::google::protobuf::Arena* arena) const {
-  FileDescriptorResponse* n = new FileDescriptorResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void FileDescriptorResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  file_descriptor_proto_.Clear();
-}
-
-bool FileDescriptorResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // repeated bytes file_descriptor_proto = 1;
-      case 1: {
-        if (tag == 10) {
-         parse_file_descriptor_proto:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadBytes(
-                input, this->add_file_descriptor_proto()));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(10)) goto parse_file_descriptor_proto;
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.FileDescriptorResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.FileDescriptorResponse)
-  return false;
-#undef DO_
-}
-
-void FileDescriptorResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  // repeated bytes file_descriptor_proto = 1;
-  for (int i = 0; i < this->file_descriptor_proto_size(); i++) {
-    ::google::protobuf::internal::WireFormatLite::WriteBytes(
-      1, this->file_descriptor_proto(i), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.FileDescriptorResponse)
-}
-
-::google::protobuf::uint8* FileDescriptorResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  // repeated bytes file_descriptor_proto = 1;
-  for (int i = 0; i < this->file_descriptor_proto_size(); i++) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      WriteBytesToArray(1, this->file_descriptor_proto(i), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.FileDescriptorResponse)
-  return target;
-}
-
-size_t FileDescriptorResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  size_t total_size = 0;
-
-  // repeated bytes file_descriptor_proto = 1;
-  total_size += 1 *
-      ::google::protobuf::internal::FromIntSize(this->file_descriptor_proto_size());
-  for (int i = 0; i < this->file_descriptor_proto_size(); i++) {
-    total_size += ::google::protobuf::internal::WireFormatLite::BytesSize(
-      this->file_descriptor_proto(i));
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void FileDescriptorResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const FileDescriptorResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const FileDescriptorResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.FileDescriptorResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.FileDescriptorResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void FileDescriptorResponse::MergeFrom(const FileDescriptorResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void FileDescriptorResponse::UnsafeMergeFrom(const FileDescriptorResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  file_descriptor_proto_.UnsafeMergeFrom(from.file_descriptor_proto_);
-}
-
-void FileDescriptorResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void FileDescriptorResponse::CopyFrom(const FileDescriptorResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool FileDescriptorResponse::IsInitialized() const {
-
-  return true;
-}
-
-void FileDescriptorResponse::Swap(FileDescriptorResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void FileDescriptorResponse::InternalSwap(FileDescriptorResponse* other) {
-  file_descriptor_proto_.UnsafeArenaSwap(&other->file_descriptor_proto_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata FileDescriptorResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = FileDescriptorResponse_descriptor_;
-  metadata.reflection = FileDescriptorResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// FileDescriptorResponse
-
-// repeated bytes file_descriptor_proto = 1;
-int FileDescriptorResponse::file_descriptor_proto_size() const {
-  return file_descriptor_proto_.size();
-}
-void FileDescriptorResponse::clear_file_descriptor_proto() {
-  file_descriptor_proto_.Clear();
-}
-const ::std::string& FileDescriptorResponse::file_descriptor_proto(int index) const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  return file_descriptor_proto_.Get(index);
-}
-::std::string* FileDescriptorResponse::mutable_file_descriptor_proto(int index) {
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  return file_descriptor_proto_.Mutable(index);
-}
-void FileDescriptorResponse::set_file_descriptor_proto(int index, const ::std::string& value) {
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  file_descriptor_proto_.Mutable(index)->assign(value);
-}
-void FileDescriptorResponse::set_file_descriptor_proto(int index, const char* value) {
-  file_descriptor_proto_.Mutable(index)->assign(value);
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-}
-void FileDescriptorResponse::set_file_descriptor_proto(int index, const void* value, size_t size) {
-  file_descriptor_proto_.Mutable(index)->assign(
-    reinterpret_cast<const char*>(value), size);
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-}
-::std::string* FileDescriptorResponse::add_file_descriptor_proto() {
-  // @@protoc_insertion_point(field_add_mutable:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  return file_descriptor_proto_.Add();
-}
-void FileDescriptorResponse::add_file_descriptor_proto(const ::std::string& value) {
-  file_descriptor_proto_.Add()->assign(value);
-  // @@protoc_insertion_point(field_add:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-}
-void FileDescriptorResponse::add_file_descriptor_proto(const char* value) {
-  file_descriptor_proto_.Add()->assign(value);
-  // @@protoc_insertion_point(field_add_char:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-}
-void FileDescriptorResponse::add_file_descriptor_proto(const void* value, size_t size) {
-  file_descriptor_proto_.Add()->assign(reinterpret_cast<const char*>(value), size);
-  // @@protoc_insertion_point(field_add_pointer:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-}
-const ::google::protobuf::RepeatedPtrField< ::std::string>&
-FileDescriptorResponse::file_descriptor_proto() const {
-  // @@protoc_insertion_point(field_list:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  return file_descriptor_proto_;
-}
-::google::protobuf::RepeatedPtrField< ::std::string>*
-FileDescriptorResponse::mutable_file_descriptor_proto() {
-  // @@protoc_insertion_point(field_mutable_list:grpc.reflection.v1alpha.FileDescriptorResponse.file_descriptor_proto)
-  return &file_descriptor_proto_;
-}
-
-inline const FileDescriptorResponse* FileDescriptorResponse::internal_default_instance() {
-  return &FileDescriptorResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ExtensionNumberResponse::kBaseTypeNameFieldNumber;
-const int ExtensionNumberResponse::kExtensionNumberFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ExtensionNumberResponse::ExtensionNumberResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ExtensionNumberResponse)
-}
-
-void ExtensionNumberResponse::InitAsDefaultInstance() {
-}
-
-ExtensionNumberResponse::ExtensionNumberResponse(const ExtensionNumberResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ExtensionNumberResponse)
-}
-
-void ExtensionNumberResponse::SharedCtor() {
-  base_type_name_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  _cached_size_ = 0;
-}
-
-ExtensionNumberResponse::~ExtensionNumberResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  SharedDtor();
-}
-
-void ExtensionNumberResponse::SharedDtor() {
-  base_type_name_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-void ExtensionNumberResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ExtensionNumberResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ExtensionNumberResponse_descriptor_;
-}
-
-const ExtensionNumberResponse& ExtensionNumberResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ExtensionNumberResponse> ExtensionNumberResponse_default_instance_;
-
-ExtensionNumberResponse* ExtensionNumberResponse::New(::google::protobuf::Arena* arena) const {
-  ExtensionNumberResponse* n = new ExtensionNumberResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ExtensionNumberResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  base_type_name_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  extension_number_.Clear();
-}
-
-bool ExtensionNumberResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional string base_type_name = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_base_type_name()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->base_type_name().data(), this->base_type_name().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(18)) goto parse_extension_number;
-        break;
-      }
-
-      // repeated int32 extension_number = 2;
-      case 2: {
-        if (tag == 18) {
-         parse_extension_number:
-          DO_((::google::protobuf::internal::WireFormatLite::ReadPackedPrimitive<
-                   ::google::protobuf::int32, ::google::protobuf::internal::WireFormatLite::TYPE_INT32>(
-                 input, this->mutable_extension_number())));
-        } else if (tag == 16) {
-          DO_((::google::protobuf::internal::WireFormatLite::ReadRepeatedPrimitiveNoInline<
-                   ::google::protobuf::int32, ::google::protobuf::internal::WireFormatLite::TYPE_INT32>(
-                 1, 18, input, this->mutable_extension_number())));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  return false;
-#undef DO_
-}
-
-void ExtensionNumberResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  // optional string base_type_name = 1;
-  if (this->base_type_name().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->base_type_name().data(), this->base_type_name().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      1, this->base_type_name(), output);
-  }
-
-  // repeated int32 extension_number = 2;
-  if (this->extension_number_size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::WriteTag(2, ::google::protobuf::internal::WireFormatLite::WIRETYPE_LENGTH_DELIMITED, output);
-    output->WriteVarint32(_extension_number_cached_byte_size_);
-  }
-  for (int i = 0; i < this->extension_number_size(); i++) {
-    ::google::protobuf::internal::WireFormatLite::WriteInt32NoTag(
-      this->extension_number(i), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ExtensionNumberResponse)
-}
-
-::google::protobuf::uint8* ExtensionNumberResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  // optional string base_type_name = 1;
-  if (this->base_type_name().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->base_type_name().data(), this->base_type_name().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        1, this->base_type_name(), target);
-  }
-
-  // repeated int32 extension_number = 2;
-  if (this->extension_number_size() > 0) {
-    target = ::google::protobuf::internal::WireFormatLite::WriteTagToArray(
-      2,
-      ::google::protobuf::internal::WireFormatLite::WIRETYPE_LENGTH_DELIMITED,
-      target);
-    target = ::google::protobuf::io::CodedOutputStream::WriteVarint32ToArray(
-      _extension_number_cached_byte_size_, target);
-  }
-  for (int i = 0; i < this->extension_number_size(); i++) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      WriteInt32NoTagToArray(this->extension_number(i), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  return target;
-}
-
-size_t ExtensionNumberResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  size_t total_size = 0;
-
-  // optional string base_type_name = 1;
-  if (this->base_type_name().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->base_type_name());
-  }
-
-  // repeated int32 extension_number = 2;
-  {
-    size_t data_size = 0;
-    unsigned int count = this->extension_number_size();
-    for (unsigned int i = 0; i < count; i++) {
-      data_size += ::google::protobuf::internal::WireFormatLite::
-        Int32Size(this->extension_number(i));
-    }
-    if (data_size > 0) {
-      total_size += 1 +
-        ::google::protobuf::internal::WireFormatLite::Int32Size(data_size);
-    }
-    int cached_size = ::google::protobuf::internal::ToCachedSize(data_size);
-    GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-    _extension_number_cached_byte_size_ = cached_size;
-    GOOGLE_SAFE_CONCURRENT_WRITES_END();
-    total_size += data_size;
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ExtensionNumberResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ExtensionNumberResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ExtensionNumberResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ExtensionNumberResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ExtensionNumberResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ExtensionNumberResponse::MergeFrom(const ExtensionNumberResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ExtensionNumberResponse::UnsafeMergeFrom(const ExtensionNumberResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  extension_number_.UnsafeMergeFrom(from.extension_number_);
-  if (from.base_type_name().size() > 0) {
-
-    base_type_name_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.base_type_name_);
-  }
-}
-
-void ExtensionNumberResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ExtensionNumberResponse::CopyFrom(const ExtensionNumberResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ExtensionNumberResponse::IsInitialized() const {
-
-  return true;
-}
-
-void ExtensionNumberResponse::Swap(ExtensionNumberResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ExtensionNumberResponse::InternalSwap(ExtensionNumberResponse* other) {
-  base_type_name_.Swap(&other->base_type_name_);
-  extension_number_.UnsafeArenaSwap(&other->extension_number_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ExtensionNumberResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ExtensionNumberResponse_descriptor_;
-  metadata.reflection = ExtensionNumberResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ExtensionNumberResponse
-
-// optional string base_type_name = 1;
-void ExtensionNumberResponse::clear_base_type_name() {
-  base_type_name_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ExtensionNumberResponse::base_type_name() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-  return base_type_name_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ExtensionNumberResponse::set_base_type_name(const ::std::string& value) {
-  
-  base_type_name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-}
-void ExtensionNumberResponse::set_base_type_name(const char* value) {
-  
-  base_type_name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-}
-void ExtensionNumberResponse::set_base_type_name(const char* value, size_t size) {
-  
-  base_type_name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-}
-::std::string* ExtensionNumberResponse::mutable_base_type_name() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-  return base_type_name_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ExtensionNumberResponse::release_base_type_name() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-  
-  return base_type_name_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ExtensionNumberResponse::set_allocated_base_type_name(::std::string* base_type_name) {
-  if (base_type_name != NULL) {
-    
-  } else {
-    
-  }
-  base_type_name_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), base_type_name);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ExtensionNumberResponse.base_type_name)
-}
-
-// repeated int32 extension_number = 2;
-int ExtensionNumberResponse::extension_number_size() const {
-  return extension_number_.size();
-}
-void ExtensionNumberResponse::clear_extension_number() {
-  extension_number_.Clear();
-}
-::google::protobuf::int32 ExtensionNumberResponse::extension_number(int index) const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ExtensionNumberResponse.extension_number)
-  return extension_number_.Get(index);
-}
-void ExtensionNumberResponse::set_extension_number(int index, ::google::protobuf::int32 value) {
-  extension_number_.Set(index, value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ExtensionNumberResponse.extension_number)
-}
-void ExtensionNumberResponse::add_extension_number(::google::protobuf::int32 value) {
-  extension_number_.Add(value);
-  // @@protoc_insertion_point(field_add:grpc.reflection.v1alpha.ExtensionNumberResponse.extension_number)
-}
-const ::google::protobuf::RepeatedField< ::google::protobuf::int32 >&
-ExtensionNumberResponse::extension_number() const {
-  // @@protoc_insertion_point(field_list:grpc.reflection.v1alpha.ExtensionNumberResponse.extension_number)
-  return extension_number_;
-}
-::google::protobuf::RepeatedField< ::google::protobuf::int32 >*
-ExtensionNumberResponse::mutable_extension_number() {
-  // @@protoc_insertion_point(field_mutable_list:grpc.reflection.v1alpha.ExtensionNumberResponse.extension_number)
-  return &extension_number_;
-}
-
-inline const ExtensionNumberResponse* ExtensionNumberResponse::internal_default_instance() {
-  return &ExtensionNumberResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ListServiceResponse::kServiceFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ListServiceResponse::ListServiceResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ListServiceResponse)
-}
-
-void ListServiceResponse::InitAsDefaultInstance() {
-}
-
-ListServiceResponse::ListServiceResponse(const ListServiceResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ListServiceResponse)
-}
-
-void ListServiceResponse::SharedCtor() {
-  _cached_size_ = 0;
-}
-
-ListServiceResponse::~ListServiceResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ListServiceResponse)
-  SharedDtor();
-}
-
-void ListServiceResponse::SharedDtor() {
-}
-
-void ListServiceResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ListServiceResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ListServiceResponse_descriptor_;
-}
-
-const ListServiceResponse& ListServiceResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ListServiceResponse> ListServiceResponse_default_instance_;
-
-ListServiceResponse* ListServiceResponse::New(::google::protobuf::Arena* arena) const {
-  ListServiceResponse* n = new ListServiceResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ListServiceResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ListServiceResponse)
-  service_.Clear();
-}
-
-bool ListServiceResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ListServiceResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(input->IncrementRecursionDepth());
-         parse_loop_service:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtualNoRecursionDepth(
-                input, add_service()));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(10)) goto parse_loop_service;
-        input->UnsafeDecrementRecursionDepth();
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ListServiceResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ListServiceResponse)
-  return false;
-#undef DO_
-}
-
-void ListServiceResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ListServiceResponse)
-  // repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
-  for (unsigned int i = 0, n = this->service_size(); i < n; i++) {
-    ::google::protobuf::internal::WireFormatLite::WriteMessageMaybeToArray(
-      1, this->service(i), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ListServiceResponse)
-}
-
-::google::protobuf::uint8* ListServiceResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ListServiceResponse)
-  // repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
-  for (unsigned int i = 0, n = this->service_size(); i < n; i++) {
-    target = ::google::protobuf::internal::WireFormatLite::
-      InternalWriteMessageNoVirtualToArray(
-        1, this->service(i), false, target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ListServiceResponse)
-  return target;
-}
-
-size_t ListServiceResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ListServiceResponse)
-  size_t total_size = 0;
-
-  // repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
-  {
-    unsigned int count = this->service_size();
-    total_size += 1UL * count;
-    for (unsigned int i = 0; i < count; i++) {
-      total_size +=
-        ::google::protobuf::internal::WireFormatLite::MessageSizeNoVirtual(
-          this->service(i));
-    }
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ListServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ListServiceResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ListServiceResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ListServiceResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ListServiceResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ListServiceResponse::MergeFrom(const ListServiceResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ListServiceResponse::UnsafeMergeFrom(const ListServiceResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  service_.MergeFrom(from.service_);
-}
-
-void ListServiceResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ListServiceResponse::CopyFrom(const ListServiceResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ListServiceResponse::IsInitialized() const {
-
-  return true;
-}
-
-void ListServiceResponse::Swap(ListServiceResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ListServiceResponse::InternalSwap(ListServiceResponse* other) {
-  service_.UnsafeArenaSwap(&other->service_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ListServiceResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ListServiceResponse_descriptor_;
-  metadata.reflection = ListServiceResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ListServiceResponse
-
-// repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
-int ListServiceResponse::service_size() const {
-  return service_.size();
-}
-void ListServiceResponse::clear_service() {
-  service_.Clear();
-}
-const ::grpc::reflection::v1alpha::ServiceResponse& ListServiceResponse::service(int index) const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ListServiceResponse.service)
-  return service_.Get(index);
-}
-::grpc::reflection::v1alpha::ServiceResponse* ListServiceResponse::mutable_service(int index) {
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ListServiceResponse.service)
-  return service_.Mutable(index);
-}
-::grpc::reflection::v1alpha::ServiceResponse* ListServiceResponse::add_service() {
-  // @@protoc_insertion_point(field_add:grpc.reflection.v1alpha.ListServiceResponse.service)
-  return service_.Add();
-}
-::google::protobuf::RepeatedPtrField< ::grpc::reflection::v1alpha::ServiceResponse >*
-ListServiceResponse::mutable_service() {
-  // @@protoc_insertion_point(field_mutable_list:grpc.reflection.v1alpha.ListServiceResponse.service)
-  return &service_;
-}
-const ::google::protobuf::RepeatedPtrField< ::grpc::reflection::v1alpha::ServiceResponse >&
-ListServiceResponse::service() const {
-  // @@protoc_insertion_point(field_list:grpc.reflection.v1alpha.ListServiceResponse.service)
-  return service_;
-}
-
-inline const ListServiceResponse* ListServiceResponse::internal_default_instance() {
-  return &ListServiceResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ServiceResponse::kNameFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ServiceResponse::ServiceResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ServiceResponse)
-}
-
-void ServiceResponse::InitAsDefaultInstance() {
-}
-
-ServiceResponse::ServiceResponse(const ServiceResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ServiceResponse)
-}
-
-void ServiceResponse::SharedCtor() {
-  name_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  _cached_size_ = 0;
-}
-
-ServiceResponse::~ServiceResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ServiceResponse)
-  SharedDtor();
-}
-
-void ServiceResponse::SharedDtor() {
-  name_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-void ServiceResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ServiceResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ServiceResponse_descriptor_;
-}
-
-const ServiceResponse& ServiceResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ServiceResponse> ServiceResponse_default_instance_;
-
-ServiceResponse* ServiceResponse::New(::google::protobuf::Arena* arena) const {
-  ServiceResponse* n = new ServiceResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ServiceResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ServiceResponse)
-  name_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-bool ServiceResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ServiceResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional string name = 1;
-      case 1: {
-        if (tag == 10) {
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_name()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->name().data(), this->name().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ServiceResponse.name"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ServiceResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ServiceResponse)
-  return false;
-#undef DO_
-}
-
-void ServiceResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ServiceResponse)
-  // optional string name = 1;
-  if (this->name().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->name().data(), this->name().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServiceResponse.name");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      1, this->name(), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServiceResponse)
-}
-
-::google::protobuf::uint8* ServiceResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServiceResponse)
-  // optional string name = 1;
-  if (this->name().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->name().data(), this->name().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ServiceResponse.name");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        1, this->name(), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ServiceResponse)
-  return target;
-}
-
-size_t ServiceResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ServiceResponse)
-  size_t total_size = 0;
-
-  // optional string name = 1;
-  if (this->name().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->name());
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ServiceResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ServiceResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ServiceResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ServiceResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ServiceResponse::MergeFrom(const ServiceResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ServiceResponse::UnsafeMergeFrom(const ServiceResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  if (from.name().size() > 0) {
-
-    name_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.name_);
-  }
-}
-
-void ServiceResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ServiceResponse::CopyFrom(const ServiceResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ServiceResponse::IsInitialized() const {
-
-  return true;
-}
-
-void ServiceResponse::Swap(ServiceResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ServiceResponse::InternalSwap(ServiceResponse* other) {
-  name_.Swap(&other->name_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ServiceResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ServiceResponse_descriptor_;
-  metadata.reflection = ServiceResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ServiceResponse
-
-// optional string name = 1;
-void ServiceResponse::clear_name() {
-  name_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ServiceResponse::name() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ServiceResponse.name)
-  return name_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServiceResponse::set_name(const ::std::string& value) {
-  
-  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ServiceResponse.name)
-}
-void ServiceResponse::set_name(const char* value) {
-  
-  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ServiceResponse.name)
-}
-void ServiceResponse::set_name(const char* value, size_t size) {
-  
-  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ServiceResponse.name)
-}
-::std::string* ServiceResponse::mutable_name() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ServiceResponse.name)
-  return name_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ServiceResponse::release_name() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ServiceResponse.name)
-  
-  return name_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ServiceResponse::set_allocated_name(::std::string* name) {
-  if (name != NULL) {
-    
-  } else {
-    
-  }
-  name_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), name);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ServiceResponse.name)
-}
-
-inline const ServiceResponse* ServiceResponse::internal_default_instance() {
-  return &ServiceResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// ===================================================================
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-const int ErrorResponse::kErrorCodeFieldNumber;
-const int ErrorResponse::kErrorMessageFieldNumber;
-#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
-
-ErrorResponse::ErrorResponse()
-  : ::google::protobuf::Message(), _internal_metadata_(NULL) {
-  if (this != internal_default_instance()) protobuf_InitDefaults_reflection_2eproto();
-  SharedCtor();
-  // @@protoc_insertion_point(constructor:grpc.reflection.v1alpha.ErrorResponse)
-}
-
-void ErrorResponse::InitAsDefaultInstance() {
-}
-
-ErrorResponse::ErrorResponse(const ErrorResponse& from)
-  : ::google::protobuf::Message(),
-    _internal_metadata_(NULL) {
-  SharedCtor();
-  UnsafeMergeFrom(from);
-  // @@protoc_insertion_point(copy_constructor:grpc.reflection.v1alpha.ErrorResponse)
-}
-
-void ErrorResponse::SharedCtor() {
-  error_message_.UnsafeSetDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-  error_code_ = 0;
-  _cached_size_ = 0;
-}
-
-ErrorResponse::~ErrorResponse() {
-  // @@protoc_insertion_point(destructor:grpc.reflection.v1alpha.ErrorResponse)
-  SharedDtor();
-}
-
-void ErrorResponse::SharedDtor() {
-  error_message_.DestroyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-void ErrorResponse::SetCachedSize(int size) const {
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-}
-const ::google::protobuf::Descriptor* ErrorResponse::descriptor() {
-  protobuf_AssignDescriptorsOnce();
-  return ErrorResponse_descriptor_;
-}
-
-const ErrorResponse& ErrorResponse::default_instance() {
-  protobuf_InitDefaults_reflection_2eproto();
-  return *internal_default_instance();
-}
-
-::google::protobuf::internal::ExplicitlyConstructed<ErrorResponse> ErrorResponse_default_instance_;
-
-ErrorResponse* ErrorResponse::New(::google::protobuf::Arena* arena) const {
-  ErrorResponse* n = new ErrorResponse;
-  if (arena != NULL) {
-    arena->Own(n);
-  }
-  return n;
-}
-
-void ErrorResponse::Clear() {
-// @@protoc_insertion_point(message_clear_start:grpc.reflection.v1alpha.ErrorResponse)
-  error_code_ = 0;
-  error_message_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-
-bool ErrorResponse::MergePartialFromCodedStream(
-    ::google::protobuf::io::CodedInputStream* input) {
-#define DO_(EXPRESSION) if (!GOOGLE_PREDICT_TRUE(EXPRESSION)) goto failure
-  ::google::protobuf::uint32 tag;
-  // @@protoc_insertion_point(parse_start:grpc.reflection.v1alpha.ErrorResponse)
-  for (;;) {
-    ::std::pair< ::google::protobuf::uint32, bool> p = input->ReadTagWithCutoff(127);
-    tag = p.first;
-    if (!p.second) goto handle_unusual;
-    switch (::google::protobuf::internal::WireFormatLite::GetTagFieldNumber(tag)) {
-      // optional int32 error_code = 1;
-      case 1: {
-        if (tag == 8) {
-
-          DO_((::google::protobuf::internal::WireFormatLite::ReadPrimitive<
-                   ::google::protobuf::int32, ::google::protobuf::internal::WireFormatLite::TYPE_INT32>(
-                 input, &error_code_)));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectTag(18)) goto parse_error_message;
-        break;
-      }
-
-      // optional string error_message = 2;
-      case 2: {
-        if (tag == 18) {
-         parse_error_message:
-          DO_(::google::protobuf::internal::WireFormatLite::ReadString(
-                input, this->mutable_error_message()));
-          DO_(::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-            this->error_message().data(), this->error_message().length(),
-            ::google::protobuf::internal::WireFormatLite::PARSE,
-            "grpc.reflection.v1alpha.ErrorResponse.error_message"));
-        } else {
-          goto handle_unusual;
-        }
-        if (input->ExpectAtEnd()) goto success;
-        break;
-      }
-
-      default: {
-      handle_unusual:
-        if (tag == 0 ||
-            ::google::protobuf::internal::WireFormatLite::GetTagWireType(tag) ==
-            ::google::protobuf::internal::WireFormatLite::WIRETYPE_END_GROUP) {
-          goto success;
-        }
-        DO_(::google::protobuf::internal::WireFormatLite::SkipField(input, tag));
-        break;
-      }
-    }
-  }
-success:
-  // @@protoc_insertion_point(parse_success:grpc.reflection.v1alpha.ErrorResponse)
-  return true;
-failure:
-  // @@protoc_insertion_point(parse_failure:grpc.reflection.v1alpha.ErrorResponse)
-  return false;
-#undef DO_
-}
-
-void ErrorResponse::SerializeWithCachedSizes(
-    ::google::protobuf::io::CodedOutputStream* output) const {
-  // @@protoc_insertion_point(serialize_start:grpc.reflection.v1alpha.ErrorResponse)
-  // optional int32 error_code = 1;
-  if (this->error_code() != 0) {
-    ::google::protobuf::internal::WireFormatLite::WriteInt32(1, this->error_code(), output);
-  }
-
-  // optional string error_message = 2;
-  if (this->error_message().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->error_message().data(), this->error_message().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ErrorResponse.error_message");
-    ::google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(
-      2, this->error_message(), output);
-  }
-
-  // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ErrorResponse)
-}
-
-::google::protobuf::uint8* ErrorResponse::InternalSerializeWithCachedSizesToArray(
-    bool deterministic, ::google::protobuf::uint8* target) const {
-  (void)deterministic; // Unused
-  // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ErrorResponse)
-  // optional int32 error_code = 1;
-  if (this->error_code() != 0) {
-    target = ::google::protobuf::internal::WireFormatLite::WriteInt32ToArray(1, this->error_code(), target);
-  }
-
-  // optional string error_message = 2;
-  if (this->error_message().size() > 0) {
-    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
-      this->error_message().data(), this->error_message().length(),
-      ::google::protobuf::internal::WireFormatLite::SERIALIZE,
-      "grpc.reflection.v1alpha.ErrorResponse.error_message");
-    target =
-      ::google::protobuf::internal::WireFormatLite::WriteStringToArray(
-        2, this->error_message(), target);
-  }
-
-  // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ErrorResponse)
-  return target;
-}
-
-size_t ErrorResponse::ByteSizeLong() const {
-// @@protoc_insertion_point(message_byte_size_start:grpc.reflection.v1alpha.ErrorResponse)
-  size_t total_size = 0;
-
-  // optional int32 error_code = 1;
-  if (this->error_code() != 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::Int32Size(
-        this->error_code());
-  }
-
-  // optional string error_message = 2;
-  if (this->error_message().size() > 0) {
-    total_size += 1 +
-      ::google::protobuf::internal::WireFormatLite::StringSize(
-        this->error_message());
-  }
-
-  int cached_size = ::google::protobuf::internal::ToCachedSize(total_size);
-  GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN();
-  _cached_size_ = cached_size;
-  GOOGLE_SAFE_CONCURRENT_WRITES_END();
-  return total_size;
-}
-
-void ErrorResponse::MergeFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
-  const ErrorResponse* source =
-      ::google::protobuf::internal::DynamicCastToGenerated<const ErrorResponse>(
-          &from);
-  if (source == NULL) {
-  // @@protoc_insertion_point(generalized_merge_from_cast_fail:grpc.reflection.v1alpha.ErrorResponse)
-    ::google::protobuf::internal::ReflectionOps::Merge(from, this);
-  } else {
-  // @@protoc_insertion_point(generalized_merge_from_cast_success:grpc.reflection.v1alpha.ErrorResponse)
-    UnsafeMergeFrom(*source);
-  }
-}
-
-void ErrorResponse::MergeFrom(const ErrorResponse& from) {
-// @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (GOOGLE_PREDICT_TRUE(&from != this)) {
-    UnsafeMergeFrom(from);
-  } else {
-    MergeFromFail(__LINE__);
-  }
-}
-
-void ErrorResponse::UnsafeMergeFrom(const ErrorResponse& from) {
-  GOOGLE_DCHECK(&from != this);
-  if (from.error_code() != 0) {
-    set_error_code(from.error_code());
-  }
-  if (from.error_message().size() > 0) {
-
-    error_message_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.error_message_);
-  }
-}
-
-void ErrorResponse::CopyFrom(const ::google::protobuf::Message& from) {
-// @@protoc_insertion_point(generalized_copy_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (&from == this) return;
-  Clear();
-  MergeFrom(from);
-}
-
-void ErrorResponse::CopyFrom(const ErrorResponse& from) {
-// @@protoc_insertion_point(class_specific_copy_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (&from == this) return;
-  Clear();
-  UnsafeMergeFrom(from);
-}
-
-bool ErrorResponse::IsInitialized() const {
-
-  return true;
-}
-
-void ErrorResponse::Swap(ErrorResponse* other) {
-  if (other == this) return;
-  InternalSwap(other);
-}
-void ErrorResponse::InternalSwap(ErrorResponse* other) {
-  std::swap(error_code_, other->error_code_);
-  error_message_.Swap(&other->error_message_);
-  _internal_metadata_.Swap(&other->_internal_metadata_);
-  std::swap(_cached_size_, other->_cached_size_);
-}
-
-::google::protobuf::Metadata ErrorResponse::GetMetadata() const {
-  protobuf_AssignDescriptorsOnce();
-  ::google::protobuf::Metadata metadata;
-  metadata.descriptor = ErrorResponse_descriptor_;
-  metadata.reflection = ErrorResponse_reflection_;
-  return metadata;
-}
-
-#if PROTOBUF_INLINE_NOT_IN_HEADERS
-// ErrorResponse
-
-// optional int32 error_code = 1;
-void ErrorResponse::clear_error_code() {
-  error_code_ = 0;
-}
-::google::protobuf::int32 ErrorResponse::error_code() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ErrorResponse.error_code)
-  return error_code_;
-}
-void ErrorResponse::set_error_code(::google::protobuf::int32 value) {
-  
-  error_code_ = value;
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ErrorResponse.error_code)
-}
-
-// optional string error_message = 2;
-void ErrorResponse::clear_error_message() {
-  error_message_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-const ::std::string& ErrorResponse::error_message() const {
-  // @@protoc_insertion_point(field_get:grpc.reflection.v1alpha.ErrorResponse.error_message)
-  return error_message_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ErrorResponse::set_error_message(const ::std::string& value) {
-  
-  error_message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
-  // @@protoc_insertion_point(field_set:grpc.reflection.v1alpha.ErrorResponse.error_message)
-}
-void ErrorResponse::set_error_message(const char* value) {
-  
-  error_message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
-  // @@protoc_insertion_point(field_set_char:grpc.reflection.v1alpha.ErrorResponse.error_message)
-}
-void ErrorResponse::set_error_message(const char* value, size_t size) {
-  
-  error_message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
-      ::std::string(reinterpret_cast<const char*>(value), size));
-  // @@protoc_insertion_point(field_set_pointer:grpc.reflection.v1alpha.ErrorResponse.error_message)
-}
-::std::string* ErrorResponse::mutable_error_message() {
-  
-  // @@protoc_insertion_point(field_mutable:grpc.reflection.v1alpha.ErrorResponse.error_message)
-  return error_message_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-::std::string* ErrorResponse::release_error_message() {
-  // @@protoc_insertion_point(field_release:grpc.reflection.v1alpha.ErrorResponse.error_message)
-  
-  return error_message_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
-}
-void ErrorResponse::set_allocated_error_message(::std::string* error_message) {
-  if (error_message != NULL) {
-    
-  } else {
-    
-  }
-  error_message_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), error_message);
-  // @@protoc_insertion_point(field_set_allocated:grpc.reflection.v1alpha.ErrorResponse.error_message)
-}
-
-inline const ErrorResponse* ErrorResponse::internal_default_instance() {
-  return &ErrorResponse_default_instance_.get();
-}
-#endif  // PROTOBUF_INLINE_NOT_IN_HEADERS
-
-// @@protoc_insertion_point(namespace_scope)
-
-}  // namespace v1alpha
-}  // namespace reflection
-}  // namespace grpc
-
-// @@protoc_insertion_point(global_scope)
diff --git a/src/cpp/server/dynamic_thread_pool.cc b/src/cpp/server/dynamic_thread_pool.cc
index 4b226c2992..1fdc2edb25 100644
--- a/src/cpp/server/dynamic_thread_pool.cc
+++ b/src/cpp/server/dynamic_thread_pool.cc
@@ -31,16 +31,16 @@
  *
  */
 
-#include <grpc++/impl/sync.h>
-#include <grpc++/impl/thd.h>
+#include <mutex>
+#include <thread>
 
 #include "src/cpp/server/dynamic_thread_pool.h"
 
 namespace grpc {
 DynamicThreadPool::DynamicThread::DynamicThread(DynamicThreadPool* pool)
     : pool_(pool),
-      thd_(new grpc::thread(&DynamicThreadPool::DynamicThread::ThreadFunc,
-                            this)) {}
+      thd_(new std::thread(&DynamicThreadPool::DynamicThread::ThreadFunc,
+                           this)) {}
 DynamicThreadPool::DynamicThread::~DynamicThread() {
   thd_->join();
   thd_.reset();
@@ -49,7 +49,7 @@ DynamicThreadPool::DynamicThread::~DynamicThread() {
 void DynamicThreadPool::DynamicThread::ThreadFunc() {
   pool_->ThreadFunc();
   // Now that we have killed ourselves, we should reduce the thread count
-  grpc::unique_lock<grpc::mutex> lock(pool_->mu_);
+  std::unique_lock<std::mutex> lock(pool_->mu_);
   pool_->nthreads_--;
   // Move ourselves to dead list
   pool_->dead_threads_.push_back(this);
@@ -62,7 +62,7 @@ void DynamicThreadPool::DynamicThread::ThreadFunc() {
 void DynamicThreadPool::ThreadFunc() {
   for (;;) {
     // Wait until work is available or we are shutting down.
-    grpc::unique_lock<grpc::mutex> lock(mu_);
+    std::unique_lock<std::mutex> lock(mu_);
     if (!shutdown_ && callbacks_.empty()) {
       // If there are too many threads waiting, then quit this thread
       if (threads_waiting_ >= reserve_threads_) {
@@ -91,7 +91,7 @@ DynamicThreadPool::DynamicThreadPool(int reserve_threads)
       nthreads_(0),
       threads_waiting_(0) {
   for (int i = 0; i < reserve_threads_; i++) {
-    grpc::lock_guard<grpc::mutex> lock(mu_);
+    std::lock_guard<std::mutex> lock(mu_);
     nthreads_++;
     new DynamicThread(this);
   }
@@ -104,7 +104,7 @@ void DynamicThreadPool::ReapThreads(std::list<DynamicThread*>* tlist) {
 }
 
 DynamicThreadPool::~DynamicThreadPool() {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   shutdown_ = true;
   cv_.notify_all();
   while (nthreads_ != 0) {
@@ -114,7 +114,7 @@ DynamicThreadPool::~DynamicThreadPool() {
 }
 
 void DynamicThreadPool::Add(const std::function<void()>& callback) {
-  grpc::lock_guard<grpc::mutex> lock(mu_);
+  std::lock_guard<std::mutex> lock(mu_);
   // Add works to the callbacks list
   callbacks_.push(callback);
   // Increase pool size or notify as needed
diff --git a/src/cpp/server/dynamic_thread_pool.h b/src/cpp/server/dynamic_thread_pool.h
index 5ba7533c05..4f8c4111cc 100644
--- a/src/cpp/server/dynamic_thread_pool.h
+++ b/src/cpp/server/dynamic_thread_pool.h
@@ -34,24 +34,25 @@
 #ifndef GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
 #define GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
 
+#include <condition_variable>
 #include <list>
 #include <memory>
+#include <mutex>
 #include <queue>
+#include <thread>
 
-#include <grpc++/impl/sync.h>
-#include <grpc++/impl/thd.h>
 #include <grpc++/support/config.h>
 
 #include "src/cpp/server/thread_pool_interface.h"
 
 namespace grpc {
 
-class DynamicThreadPool GRPC_FINAL : public ThreadPoolInterface {
+class DynamicThreadPool final : public ThreadPoolInterface {
  public:
   explicit DynamicThreadPool(int reserve_threads);
   ~DynamicThreadPool();
 
-  void Add(const std::function<void()>& callback) GRPC_OVERRIDE;
+  void Add(const std::function<void()>& callback) override;
 
  private:
   class DynamicThread {
@@ -61,12 +62,12 @@ class DynamicThreadPool GRPC_FINAL : public ThreadPoolInterface {
 
    private:
     DynamicThreadPool* pool_;
-    std::unique_ptr<grpc::thread> thd_;
+    std::unique_ptr<std::thread> thd_;
     void ThreadFunc();
   };
-  grpc::mutex mu_;
-  grpc::condition_variable cv_;
-  grpc::condition_variable shutdown_cv_;
+  std::mutex mu_;
+  std::condition_variable cv_;
+  std::condition_variable shutdown_cv_;
   bool shutdown_;
   std::queue<std::function<void()>> callbacks_;
   int reserve_threads_;
diff --git a/src/cpp/server/insecure_server_credentials.cc b/src/cpp/server/insecure_server_credentials.cc
index ef3cae5fd7..eb5931b7b0 100644
--- a/src/cpp/server/insecure_server_credentials.cc
+++ b/src/cpp/server/insecure_server_credentials.cc
@@ -38,14 +38,13 @@
 
 namespace grpc {
 namespace {
-class InsecureServerCredentialsImpl GRPC_FINAL : public ServerCredentials {
+class InsecureServerCredentialsImpl final : public ServerCredentials {
  public:
-  int AddPortToServer(const grpc::string& addr,
-                      grpc_server* server) GRPC_OVERRIDE {
+  int AddPortToServer(const grpc::string& addr, grpc_server* server) override {
     return grpc_server_add_insecure_http2_port(server, addr.c_str());
   }
   void SetAuthMetadataProcessor(
-      const std::shared_ptr<AuthMetadataProcessor>& processor) GRPC_OVERRIDE {
+      const std::shared_ptr<AuthMetadataProcessor>& processor) override {
     (void)processor;
     GPR_ASSERT(0);  // Should not be called on InsecureServerCredentials.
   }
diff --git a/src/cpp/server/secure_server_credentials.h b/src/cpp/server/secure_server_credentials.h
index 5460f4a02c..3a301e60c2 100644
--- a/src/cpp/server/secure_server_credentials.h
+++ b/src/cpp/server/secure_server_credentials.h
@@ -44,7 +44,7 @@
 
 namespace grpc {
 
-class AuthMetadataProcessorAyncWrapper GRPC_FINAL {
+class AuthMetadataProcessorAyncWrapper final {
  public:
   static void Destroy(void* wrapper);
 
@@ -64,19 +64,18 @@ class AuthMetadataProcessorAyncWrapper GRPC_FINAL {
   std::shared_ptr<AuthMetadataProcessor> processor_;
 };
 
-class SecureServerCredentials GRPC_FINAL : public ServerCredentials {
+class SecureServerCredentials final : public ServerCredentials {
  public:
   explicit SecureServerCredentials(grpc_server_credentials* creds)
       : creds_(creds) {}
-  ~SecureServerCredentials() GRPC_OVERRIDE {
+  ~SecureServerCredentials() override {
     grpc_server_credentials_release(creds_);
   }
 
-  int AddPortToServer(const grpc::string& addr,
-                      grpc_server* server) GRPC_OVERRIDE;
+  int AddPortToServer(const grpc::string& addr, grpc_server* server) override;
 
   void SetAuthMetadataProcessor(
-      const std::shared_ptr<AuthMetadataProcessor>& processor) GRPC_OVERRIDE;
+      const std::shared_ptr<AuthMetadataProcessor>& processor) override;
 
  private:
   grpc_server_credentials* creds_;
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 953a4337ec..00a90bb184 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -36,6 +36,7 @@
 #include <grpc++/impl/service_type.h>
 #include <grpc++/resource_quota.h>
 #include <grpc++/server.h>
+#include <grpc/support/cpu.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
@@ -55,6 +56,7 @@ static void do_plugin_list_init(void) {
 ServerBuilder::ServerBuilder()
     : max_receive_message_size_(-1),
       max_send_message_size_(-1),
+      sync_server_settings_(SyncServerSettings()),
       resource_quota_(nullptr),
       generic_service_(nullptr) {
   gpr_once_init(&once_init_plugin_list, do_plugin_list_init);
@@ -63,6 +65,7 @@ ServerBuilder::ServerBuilder()
     auto& factory = *it;
     plugins_.emplace_back(factory());
   }
+
   // all compression algorithms enabled by default.
   enabled_compression_algorithms_bitset_ =
       (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
@@ -102,7 +105,7 @@ ServerBuilder& ServerBuilder::RegisterAsyncGenericService(
     gpr_log(GPR_ERROR,
             "Adding multiple AsyncGenericService is unsupported for now. "
             "Dropping the service %p",
-            service);
+            (void*)service);
   } else {
     generic_service_ = service;
   }
@@ -115,6 +118,25 @@ ServerBuilder& ServerBuilder::SetOption(
   return *this;
 }
 
+ServerBuilder& ServerBuilder::SetSyncServerOption(
+    ServerBuilder::SyncServerOption option, int val) {
+  switch (option) {
+    case NUM_CQS:
+      sync_server_settings_.num_cqs = val;
+      break;
+    case MIN_POLLERS:
+      sync_server_settings_.min_pollers = val;
+      break;
+    case MAX_POLLERS:
+      sync_server_settings_.max_pollers = val;
+      break;
+    case CQ_TIMEOUT_MSEC:
+      sync_server_settings_.cq_timeout_msec = val;
+      break;
+  }
+  return *this;
+}
+
 ServerBuilder& ServerBuilder::SetCompressionAlgorithmSupportStatus(
     grpc_compression_algorithm algorithm, bool enabled) {
   if (enabled) {
@@ -157,35 +179,24 @@ ServerBuilder& ServerBuilder::AddListeningPort(
 }
 
 std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
-  std::unique_ptr<ThreadPoolInterface> thread_pool;
-  bool has_sync_methods = false;
-  for (auto it = services_.begin(); it != services_.end(); ++it) {
-    if ((*it)->service->has_synchronous_methods()) {
-      if (!thread_pool) {
-        thread_pool.reset(CreateDefaultThreadPool());
-        has_sync_methods = true;
-        break;
-      }
-    }
-  }
   ChannelArguments args;
   for (auto option = options_.begin(); option != options_.end(); ++option) {
     (*option)->UpdateArguments(&args);
     (*option)->UpdatePlugins(&plugins_);
   }
+
   for (auto plugin = plugins_.begin(); plugin != plugins_.end(); plugin++) {
-    if (!thread_pool && (*plugin)->has_sync_methods()) {
-      thread_pool.reset(CreateDefaultThreadPool());
-      has_sync_methods = true;
-    }
     (*plugin)->UpdateChannelArguments(&args);
   }
+
   if (max_receive_message_size_ >= 0) {
     args.SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, max_receive_message_size_);
   }
+
   if (max_send_message_size_ >= 0) {
     args.SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, max_send_message_size_);
   }
+
   args.SetInt(GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
               enabled_compression_algorithms_bitset_);
   if (maybe_default_compression_level_.is_set) {
@@ -196,31 +207,89 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
     args.SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
                 maybe_default_compression_algorithm_.algorithm);
   }
+
   if (resource_quota_ != nullptr) {
     args.SetPointerWithVtable(GRPC_ARG_RESOURCE_QUOTA, resource_quota_,
                               grpc_resource_quota_arg_vtable());
   }
-  std::unique_ptr<Server> server(new Server(thread_pool.release(), true,
-                                            max_receive_message_size_, &args));
+
+  // == Determine if the server has any syncrhonous methods ==
+  bool has_sync_methods = false;
+  for (auto it = services_.begin(); it != services_.end(); ++it) {
+    if ((*it)->service->has_synchronous_methods()) {
+      has_sync_methods = true;
+      break;
+    }
+  }
+
+  if (!has_sync_methods) {
+    for (auto plugin = plugins_.begin(); plugin != plugins_.end(); plugin++) {
+      if ((*plugin)->has_sync_methods()) {
+        has_sync_methods = true;
+        break;
+      }
+    }
+  }
+
+  // If this is a Sync server, i.e a server expositing sync API, then the server
+  // needs to create some completion queues to listen for incoming requests.
+  // 'sync_server_cqs' are those internal completion queues.
+  //
+  // This is different from the completion queues added to the server via
+  // ServerBuilder's AddCompletionQueue() method (those completion queues
+  // are in 'cqs_' member variable of ServerBuilder object)
+  std::shared_ptr<std::vector<std::unique_ptr<ServerCompletionQueue>>>
+      sync_server_cqs(std::make_shared<
+                      std::vector<std::unique_ptr<ServerCompletionQueue>>>());
+
+  if (has_sync_methods) {
+    // This is a Sync server
+    gpr_log(GPR_INFO,
+            "Synchronous server. Num CQs: %d, Min pollers: %d, Max Pollers: "
+            "%d, CQ timeout (msec): %d",
+            sync_server_settings_.num_cqs, sync_server_settings_.min_pollers,
+            sync_server_settings_.max_pollers,
+            sync_server_settings_.cq_timeout_msec);
+
+    // Create completion queues to listen to incoming rpc requests
+    for (int i = 0; i < sync_server_settings_.num_cqs; i++) {
+      sync_server_cqs->emplace_back(new ServerCompletionQueue());
+    }
+  }
+
+  std::unique_ptr<Server> server(new Server(
+      max_receive_message_size_, &args, sync_server_cqs,
+      sync_server_settings_.min_pollers, sync_server_settings_.max_pollers,
+      sync_server_settings_.cq_timeout_msec));
+
   ServerInitializer* initializer = server->initializer();
 
-  // If the server has atleast one sync methods, we know that this is a Sync
-  // server or a Hybrid server and the completion queue (server->cq_) would be
-  // frequently polled.
-  int num_frequently_polled_cqs = has_sync_methods ? 1 : 0;
-
-  for (auto cq = cqs_.begin(); cq != cqs_.end(); ++cq) {
-    // A completion queue that is not polled frequently (by calling Next() or
-    // AsyncNext()) is not safe to use for listening to incoming channels.
-    // Register all such completion queues as non-listening completion queues
-    // with the GRPC core library.
-    if ((*cq)->IsFrequentlyPolled()) {
-      grpc_server_register_completion_queue(server->server_, (*cq)->cq(),
+  // Register all the completion queues with the server. i.e
+  //  1. sync_server_cqs: internal completion queues created IF this is a sync
+  //     server
+  //  2. cqs_: Completion queues added via AddCompletionQueue() call
+
+  // All sync cqs (if any) are frequently polled by ThreadManager
+  int num_frequently_polled_cqs = sync_server_cqs->size();
+
+  for (auto it = sync_server_cqs->begin(); it != sync_server_cqs->end(); ++it) {
+    grpc_server_register_completion_queue(server->server_, (*it)->cq(),
+                                          nullptr);
+  }
+
+  // cqs_ contains the completion queue added by calling the ServerBuilder's
+  // AddCompletionQueue() API. Some of them may not be frequently polled (i.e by
+  // calling Next() or AsyncNext()) and hence are not safe to be used for
+  // listening to incoming channels. Such completion queues must be registered
+  // as non-listening queues
+  for (auto it = cqs_.begin(); it != cqs_.end(); ++it) {
+    if ((*it)->IsFrequentlyPolled()) {
+      grpc_server_register_completion_queue(server->server_, (*it)->cq(),
                                             nullptr);
       num_frequently_polled_cqs++;
     } else {
       grpc_server_register_non_listening_completion_queue(server->server_,
-                                                          (*cq)->cq(), nullptr);
+                                                          (*it)->cq(), nullptr);
     }
   }
 
@@ -236,9 +305,11 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
       return nullptr;
     }
   }
+
   for (auto plugin = plugins_.begin(); plugin != plugins_.end(); plugin++) {
     (*plugin)->InitServer(initializer);
   }
+
   if (generic_service_) {
     server->RegisterAsyncGenericService(generic_service_);
   } else {
@@ -251,6 +322,7 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
       }
     }
   }
+
   for (auto port = ports_.begin(); port != ports_.end(); port++) {
     int r = server->AddListeningPort(port->addr, port->creds.get());
     if (!r) return nullptr;
@@ -258,13 +330,16 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
       *port->selected_port = r;
     }
   }
+
   auto cqs_data = cqs_.empty() ? nullptr : &cqs_[0];
   if (!server->Start(cqs_data, cqs_.size())) {
     return nullptr;
   }
+
   for (auto plugin = plugins_.begin(); plugin != plugins_.end(); plugin++) {
     (*plugin)->Finish(initializer);
   }
+
   return server;
 }
 
diff --git a/src/cpp/server/server_cc.cc b/src/cpp/server/server_cc.cc
index 3f89275370..817d85a81c 100644
--- a/src/cpp/server/server_cc.cc
+++ b/src/cpp/server/server_cc.cc
@@ -1,5 +1,4 @@
 /*
- *
  * Copyright 2015, Google Inc.
  * All rights reserved.
  *
@@ -52,15 +51,15 @@
 #include <grpc/support/log.h>
 
 #include "src/core/lib/profiling/timers.h"
-#include "src/cpp/server/thread_pool_interface.h"
+#include "src/cpp/thread_manager/thread_manager.h"
 
 namespace grpc {
 
-class DefaultGlobalCallbacks GRPC_FINAL : public Server::GlobalCallbacks {
+class DefaultGlobalCallbacks final : public Server::GlobalCallbacks {
  public:
-  ~DefaultGlobalCallbacks() GRPC_OVERRIDE {}
-  void PreSynchronousRequest(ServerContext* context) GRPC_OVERRIDE {}
-  void PostSynchronousRequest(ServerContext* context) GRPC_OVERRIDE {}
+  ~DefaultGlobalCallbacks() override {}
+  void PreSynchronousRequest(ServerContext* context) override {}
+  void PostSynchronousRequest(ServerContext* context) override {}
 };
 
 static std::shared_ptr<Server::GlobalCallbacks> g_callbacks = nullptr;
@@ -80,7 +79,7 @@ class Server::UnimplementedAsyncRequestContext {
   GenericServerAsyncReaderWriter generic_stream_;
 };
 
-class Server::UnimplementedAsyncRequest GRPC_FINAL
+class Server::UnimplementedAsyncRequest final
     : public UnimplementedAsyncRequestContext,
       public GenericAsyncRequest {
  public:
@@ -90,7 +89,7 @@ class Server::UnimplementedAsyncRequest GRPC_FINAL
         server_(server),
         cq_(cq) {}
 
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
+  bool FinalizeResult(void** tag, bool* status) override;
 
   ServerContext* context() { return &server_context_; }
   GenericServerAsyncReaderWriter* stream() { return &generic_stream_; }
@@ -102,13 +101,13 @@ class Server::UnimplementedAsyncRequest GRPC_FINAL
 
 typedef SneakyCallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus>
     UnimplementedAsyncResponseOp;
-class Server::UnimplementedAsyncResponse GRPC_FINAL
+class Server::UnimplementedAsyncResponse final
     : public UnimplementedAsyncResponseOp {
  public:
   UnimplementedAsyncResponse(UnimplementedAsyncRequest* request);
   ~UnimplementedAsyncResponse() { delete request_; }
 
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+  bool FinalizeResult(void** tag, bool* status) override {
     bool r = UnimplementedAsyncResponseOp::FinalizeResult(tag, status);
     delete this;
     return r;
@@ -118,15 +117,12 @@ class Server::UnimplementedAsyncResponse GRPC_FINAL
   UnimplementedAsyncRequest* const request_;
 };
 
-class Server::ShutdownRequest GRPC_FINAL : public CompletionQueueTag {
+class ShutdownTag : public CompletionQueueTag {
  public:
-  bool FinalizeResult(void** tag, bool* status) {
-    delete this;
-    return false;
-  }
+  bool FinalizeResult(void** tag, bool* status) { return false; }
 };
 
-class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
+class Server::SyncRequest final : public CompletionQueueTag {
  public:
   SyncRequest(RpcServiceMethod* method, void* tag)
       : method_(method),
@@ -147,36 +143,6 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
     grpc_metadata_array_destroy(&request_metadata_);
   }
 
-  static SyncRequest* Wait(CompletionQueue* cq, bool* ok) {
-    void* tag = nullptr;
-    *ok = false;
-    if (!cq->Next(&tag, ok)) {
-      return nullptr;
-    }
-    auto* mrd = static_cast<SyncRequest*>(tag);
-    GPR_ASSERT(mrd->in_flight_);
-    return mrd;
-  }
-
-  static bool AsyncWait(CompletionQueue* cq, SyncRequest** req, bool* ok,
-                        gpr_timespec deadline) {
-    void* tag = nullptr;
-    *ok = false;
-    switch (cq->AsyncNext(&tag, ok, deadline)) {
-      case CompletionQueue::TIMEOUT:
-        *req = nullptr;
-        return true;
-      case CompletionQueue::SHUTDOWN:
-        *req = nullptr;
-        return false;
-      case CompletionQueue::GOT_EVENT:
-        *req = static_cast<SyncRequest*>(tag);
-        GPR_ASSERT((*req)->in_flight_);
-        return true;
-    }
-    GPR_UNREACHABLE_CODE(return false);
-  }
-
   void SetupRequest() { cq_ = grpc_completion_queue_create(nullptr); }
 
   void TeardownRequest() {
@@ -204,7 +170,7 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
     }
   }
 
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+  bool FinalizeResult(void** tag, bool* status) override {
     if (!*status) {
       grpc_completion_queue_destroy(cq_);
     }
@@ -216,7 +182,7 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
     return true;
   }
 
-  class CallData GRPC_FINAL {
+  class CallData final {
    public:
     explicit CallData(Server* server, SyncRequest* mrd)
         : cq_(mrd->cq_),
@@ -266,7 +232,6 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
   void* const tag_;
   bool in_flight_;
   const bool has_request_payload_;
-  uint32_t incoming_flags_;
   grpc_call* call_;
   grpc_call_details* call_details_;
   gpr_timespec deadline_;
@@ -275,53 +240,158 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
   grpc_completion_queue* cq_;
 };
 
+// Implementation of ThreadManager. Each instance of SyncRequestThreadManager
+// manages a pool of threads that poll for incoming Sync RPCs and call the
+// appropriate RPC handlers
+class Server::SyncRequestThreadManager : public ThreadManager {
+ public:
+  SyncRequestThreadManager(Server* server, CompletionQueue* server_cq,
+                           std::shared_ptr<GlobalCallbacks> global_callbacks,
+                           int min_pollers, int max_pollers,
+                           int cq_timeout_msec)
+      : ThreadManager(min_pollers, max_pollers),
+        server_(server),
+        server_cq_(server_cq),
+        cq_timeout_msec_(cq_timeout_msec),
+        global_callbacks_(global_callbacks) {}
+
+  WorkStatus PollForWork(void** tag, bool* ok) override {
+    *tag = nullptr;
+    gpr_timespec deadline =
+        gpr_time_from_millis(cq_timeout_msec_, GPR_TIMESPAN);
+
+    switch (server_cq_->AsyncNext(tag, ok, deadline)) {
+      case CompletionQueue::TIMEOUT:
+        return TIMEOUT;
+      case CompletionQueue::SHUTDOWN:
+        return SHUTDOWN;
+      case CompletionQueue::GOT_EVENT:
+        return WORK_FOUND;
+    }
+
+    GPR_UNREACHABLE_CODE(return TIMEOUT);
+  }
+
+  void DoWork(void* tag, bool ok) override {
+    SyncRequest* sync_req = static_cast<SyncRequest*>(tag);
+
+    if (!sync_req) {
+      // No tag. Nothing to work on. This is an unlikley scenario and possibly a
+      // bug in RPC Manager implementation.
+      gpr_log(GPR_ERROR, "Sync server. DoWork() was called with NULL tag");
+      return;
+    }
+
+    if (ok) {
+      // Calldata takes ownership of the completion queue inside sync_req
+      SyncRequest::CallData cd(server_, sync_req);
+      {
+        // Prepare for the next request
+        if (!IsShutdown()) {
+          sync_req->SetupRequest();  // Create new completion queue for sync_req
+          sync_req->Request(server_->c_server(), server_cq_->cq());
+        }
+      }
+
+      GPR_TIMER_SCOPE("cd.Run()", 0);
+      cd.Run(global_callbacks_);
+    }
+    // TODO (sreek) If ok is false here (which it isn't in case of
+    // grpc_request_registered_call), we should still re-queue the request
+    // object
+  }
+
+  void AddSyncMethod(RpcServiceMethod* method, void* tag) {
+    sync_requests_.emplace_back(new SyncRequest(method, tag));
+  }
+
+  void AddUnknownSyncMethod() {
+    if (!sync_requests_.empty()) {
+      unknown_method_.reset(new RpcServiceMethod(
+          "unknown", RpcMethod::BIDI_STREAMING, new UnknownMethodHandler));
+      sync_requests_.emplace_back(
+          new SyncRequest(unknown_method_.get(), nullptr));
+    }
+  }
+
+  void ShutdownAndDrainCompletionQueue() {
+    server_cq_->Shutdown();
+
+    // Drain any pending items from the queue
+    void* tag;
+    bool ok;
+    while (server_cq_->Next(&tag, &ok)) {
+      // Nothing to be done here
+    }
+  }
+
+  void Start() {
+    if (!sync_requests_.empty()) {
+      for (auto m = sync_requests_.begin(); m != sync_requests_.end(); m++) {
+        (*m)->SetupRequest();
+        (*m)->Request(server_->c_server(), server_cq_->cq());
+      }
+
+      Initialize();  // ThreadManager's Initialize()
+    }
+  }
+
+ private:
+  Server* server_;
+  CompletionQueue* server_cq_;
+  int cq_timeout_msec_;
+  std::vector<std::unique_ptr<SyncRequest>> sync_requests_;
+  std::unique_ptr<RpcServiceMethod> unknown_method_;
+  std::shared_ptr<Server::GlobalCallbacks> global_callbacks_;
+};
+
 static internal::GrpcLibraryInitializer g_gli_initializer;
-Server::Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
-               int max_receive_message_size, ChannelArguments* args)
+Server::Server(
+    int max_receive_message_size, ChannelArguments* args,
+    std::shared_ptr<std::vector<std::unique_ptr<ServerCompletionQueue>>>
+        sync_server_cqs,
+    int min_pollers, int max_pollers, int sync_cq_timeout_msec)
     : max_receive_message_size_(max_receive_message_size),
+      sync_server_cqs_(sync_server_cqs),
       started_(false),
       shutdown_(false),
       shutdown_notified_(false),
-      num_running_cb_(0),
-      sync_methods_(new std::list<SyncRequest>),
       has_generic_service_(false),
       server_(nullptr),
-      thread_pool_(thread_pool),
-      thread_pool_owned_(thread_pool_owned),
       server_initializer_(new ServerInitializer(this)) {
   g_gli_initializer.summon();
   gpr_once_init(&g_once_init_callbacks, InitGlobalCallbacks);
   global_callbacks_ = g_callbacks;
   global_callbacks_->UpdateArguments(args);
+
+  for (auto it = sync_server_cqs_->begin(); it != sync_server_cqs_->end();
+       it++) {
+    sync_req_mgrs_.emplace_back(new SyncRequestThreadManager(
+        this, (*it).get(), global_callbacks_, min_pollers, max_pollers,
+        sync_cq_timeout_msec));
+  }
+
   grpc_channel_args channel_args;
   args->SetChannelArgs(&channel_args);
+
   server_ = grpc_server_create(&channel_args, nullptr);
-  if (thread_pool_ == nullptr) {
-    grpc_server_register_non_listening_completion_queue(server_, cq_.cq(),
-                                                        nullptr);
-  } else {
-    grpc_server_register_completion_queue(server_, cq_.cq(), nullptr);
-  }
 }
 
 Server::~Server() {
   {
-    grpc::unique_lock<grpc::mutex> lock(mu_);
+    std::unique_lock<std::mutex> lock(mu_);
     if (started_ && !shutdown_) {
       lock.unlock();
       Shutdown();
     } else if (!started_) {
-      cq_.Shutdown();
+      // Shutdown the completion queues
+      for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+        (*it)->ShutdownAndDrainCompletionQueue();
+      }
     }
   }
-  void* got_tag;
-  bool ok;
-  GPR_ASSERT(!cq_.Next(&got_tag, &ok));
+
   grpc_server_destroy(server_);
-  if (thread_pool_owned_) {
-    delete thread_pool_;
-  }
-  delete sync_methods_;
 }
 
 void Server::SetGlobalCallbacks(GlobalCallbacks* callbacks) {
@@ -352,12 +422,14 @@ bool Server::RegisterService(const grpc::string* host, Service* service) {
                "Can only register an asynchronous service against one server.");
     service->server_ = this;
   }
+
   const char* method_name = nullptr;
   for (auto it = service->methods_.begin(); it != service->methods_.end();
        ++it) {
     if (it->get() == nullptr) {  // Handled by generic service if any.
       continue;
     }
+
     RpcServiceMethod* method = it->get();
     void* tag = grpc_server_register_method(
         server_, method->name(), host ? host->c_str() : nullptr,
@@ -367,11 +439,15 @@ bool Server::RegisterService(const grpc::string* host, Service* service) {
               method->name());
       return false;
     }
-    if (method->handler() == nullptr) {
+
+    if (method->handler() == nullptr) {  // Async method
       method->set_server_tag(tag);
     } else {
-      sync_methods_->emplace_back(method, tag);
+      for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+        (*it)->AddSyncMethod(method, tag);
+      }
     }
+
     method_name = method->name();
   }
 
@@ -406,60 +482,65 @@ bool Server::Start(ServerCompletionQueue** cqs, size_t num_cqs) {
   grpc_server_start(server_);
 
   if (!has_generic_service_) {
-    if (!sync_methods_->empty()) {
-      unknown_method_.reset(new RpcServiceMethod(
-          "unknown", RpcMethod::BIDI_STREAMING, new UnknownMethodHandler));
-      // Use of emplace_back with just constructor arguments is not accepted
-      // here by gcc-4.4 because it can't match the anonymous nullptr with a
-      // proper constructor implicitly. Construct the object and use push_back.
-      sync_methods_->push_back(SyncRequest(unknown_method_.get(), nullptr));
+    for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+      (*it)->AddUnknownSyncMethod();
     }
+
     for (size_t i = 0; i < num_cqs; i++) {
       if (cqs[i]->IsFrequentlyPolled()) {
         new UnimplementedAsyncRequest(this, cqs[i]);
       }
     }
   }
-  // Start processing rpcs.
-  if (!sync_methods_->empty()) {
-    for (auto m = sync_methods_->begin(); m != sync_methods_->end(); m++) {
-      m->SetupRequest();
-      m->Request(server_, cq_.cq());
-    }
 
-    ScheduleCallback();
+  for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+    (*it)->Start();
   }
 
   return true;
 }
 
 void Server::ShutdownInternal(gpr_timespec deadline) {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   if (started_ && !shutdown_) {
     shutdown_ = true;
-    grpc_server_shutdown_and_notify(server_, cq_.cq(), new ShutdownRequest());
-    cq_.Shutdown();
-    lock.unlock();
-    // Spin, eating requests until the completion queue is completely shutdown.
-    // If the deadline expires then cancel anything that's pending and keep
-    // spinning forever until the work is actually drained.
-    // Since nothing else needs to touch state guarded by mu_, holding it
-    // through this loop is fine.
-    SyncRequest* request;
+
+    /// The completion queue to use for server shutdown completion notification
+    CompletionQueue shutdown_cq;
+    ShutdownTag shutdown_tag;  // Dummy shutdown tag
+    grpc_server_shutdown_and_notify(server_, shutdown_cq.cq(), &shutdown_tag);
+
+    shutdown_cq.Shutdown();
+
+    void* tag;
     bool ok;
-    while (SyncRequest::AsyncWait(&cq_, &request, &ok, deadline)) {
-      if (request == NULL) {  // deadline expired
-        grpc_server_cancel_all_calls(server_);
-        deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
-      } else if (ok) {
-        SyncRequest::CallData call_data(this, request);
-      }
+    CompletionQueue::NextStatus status =
+        shutdown_cq.AsyncNext(&tag, &ok, deadline);
+
+    // If this timed out, it means we are done with the grace period for a clean
+    // shutdown. We should force a shutdown now by cancelling all inflight calls
+    if (status == CompletionQueue::NextStatus::TIMEOUT) {
+      grpc_server_cancel_all_calls(server_);
+    }
+    // Else in case of SHUTDOWN or GOT_EVENT, it means that the server has
+    // successfully shutdown
+
+    // Shutdown all ThreadManagers. This will try to gracefully stop all the
+    // threads in the ThreadManagers (once they process any inflight requests)
+    for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+      (*it)->Shutdown();  // ThreadManager's Shutdown()
     }
-    lock.lock();
 
-    // Wait for running callbacks to finish.
-    while (num_running_cb_ != 0) {
-      callback_cv_.wait(lock);
+    // Wait for threads in all ThreadManagers to terminate
+    for (auto it = sync_req_mgrs_.begin(); it != sync_req_mgrs_.end(); it++) {
+      (*it)->Wait();
+      (*it)->ShutdownAndDrainCompletionQueue();
+    }
+
+    // Drain the shutdown queue (if the previous call to AsyncNext() timed out
+    // and we didn't remove the tag from the queue yet)
+    while (shutdown_cq.Next(&tag, &ok)) {
+      // Nothing to be done here. Just ignore ok and tag values
     }
 
     shutdown_notified_ = true;
@@ -468,7 +549,7 @@ void Server::ShutdownInternal(gpr_timespec deadline) {
 }
 
 void Server::Wait() {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   while (started_ && !shutdown_notified_) {
     shutdown_cv_.wait(lock);
   }
@@ -494,9 +575,14 @@ ServerInterface::BaseAsyncRequest::BaseAsyncRequest(
       tag_(tag),
       delete_on_finalize_(delete_on_finalize),
       call_(nullptr) {
+  call_cq_->RegisterAvalanching();  // This op will trigger more ops
   memset(&initial_metadata_array_, 0, sizeof(initial_metadata_array_));
 }
 
+ServerInterface::BaseAsyncRequest::~BaseAsyncRequest() {
+  call_cq_->CompleteAvalanching();
+}
+
 bool ServerInterface::BaseAsyncRequest::FinalizeResult(void** tag,
                                                        bool* status) {
   if (*status) {
@@ -585,47 +671,6 @@ Server::UnimplementedAsyncResponse::UnimplementedAsyncResponse(
   request_->stream()->call_.PerformOps(this);
 }
 
-void Server::ScheduleCallback() {
-  {
-    grpc::unique_lock<grpc::mutex> lock(mu_);
-    num_running_cb_++;
-  }
-  thread_pool_->Add(std::bind(&Server::RunRpc, this));
-}
-
-void Server::RunRpc() {
-  // Wait for one more incoming rpc.
-  bool ok;
-  GPR_TIMER_SCOPE("Server::RunRpc", 0);
-  auto* mrd = SyncRequest::Wait(&cq_, &ok);
-  if (mrd) {
-    ScheduleCallback();
-    if (ok) {
-      SyncRequest::CallData cd(this, mrd);
-      {
-        mrd->SetupRequest();
-        grpc::unique_lock<grpc::mutex> lock(mu_);
-        if (!shutdown_) {
-          mrd->Request(server_, cq_.cq());
-        } else {
-          // destroy the structure that was created
-          mrd->TeardownRequest();
-        }
-      }
-      GPR_TIMER_SCOPE("cd.Run()", 0);
-      cd.Run(global_callbacks_);
-    }
-  }
-
-  {
-    grpc::unique_lock<grpc::mutex> lock(mu_);
-    num_running_cb_--;
-    if (shutdown_) {
-      callback_cv_.notify_all();
-    }
-  }
-}
-
 ServerInitializer* Server::initializer() { return server_initializer_.get(); }
 
 }  // namespace grpc
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index 1ca6a2b906..a66ec4ac84 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -33,9 +33,10 @@
 
 #include <grpc++/server_context.h>
 
+#include <mutex>
+
 #include <grpc++/completion_queue.h>
 #include <grpc++/impl/call.h>
-#include <grpc++/impl/sync.h>
 #include <grpc++/support/time.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
@@ -48,7 +49,7 @@ namespace grpc {
 
 // CompletionOp
 
-class ServerContext::CompletionOp GRPC_FINAL : public CallOpSetInterface {
+class ServerContext::CompletionOp final : public CallOpSetInterface {
  public:
   // initial refs: one in the server context, one in the cq
   CompletionOp()
@@ -58,8 +59,8 @@ class ServerContext::CompletionOp GRPC_FINAL : public CallOpSetInterface {
         finalized_(false),
         cancelled_(0) {}
 
-  void FillOps(grpc_op* ops, size_t* nops) GRPC_OVERRIDE;
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
+  void FillOps(grpc_op* ops, size_t* nops) override;
+  bool FinalizeResult(void** tag, bool* status) override;
 
   bool CheckCancelled(CompletionQueue* cq) {
     cq->TryPluck(this);
@@ -76,20 +77,20 @@ class ServerContext::CompletionOp GRPC_FINAL : public CallOpSetInterface {
 
  private:
   bool CheckCancelledNoPluck() {
-    grpc::lock_guard<grpc::mutex> g(mu_);
+    std::lock_guard<std::mutex> g(mu_);
     return finalized_ ? (cancelled_ != 0) : false;
   }
 
   bool has_tag_;
   void* tag_;
-  grpc::mutex mu_;
+  std::mutex mu_;
   int refs_;
   bool finalized_;
   int cancelled_;
 };
 
 void ServerContext::CompletionOp::Unref() {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   if (--refs_ == 0) {
     lock.unlock();
     delete this;
@@ -105,7 +106,7 @@ void ServerContext::CompletionOp::FillOps(grpc_op* ops, size_t* nops) {
 }
 
 bool ServerContext::CompletionOp::FinalizeResult(void** tag, bool* status) {
-  grpc::unique_lock<grpc::mutex> lock(mu_);
+  std::unique_lock<std::mutex> lock(mu_);
   finalized_ = true;
   bool ret = false;
   if (has_tag_) {
diff --git a/src/cpp/thread_manager/thread_manager.cc b/src/cpp/thread_manager/thread_manager.cc
new file mode 100644
index 0000000000..1450d009e4
--- /dev/null
+++ b/src/cpp/thread_manager/thread_manager.cc
@@ -0,0 +1,182 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/cpp/thread_manager/thread_manager.h"
+
+#include <climits>
+#include <mutex>
+#include <thread>
+
+#include <grpc/support/log.h>
+
+namespace grpc {
+
+ThreadManager::WorkerThread::WorkerThread(ThreadManager* thd_mgr)
+    : thd_mgr_(thd_mgr), thd_(&ThreadManager::WorkerThread::Run, this) {}
+
+void ThreadManager::WorkerThread::Run() {
+  thd_mgr_->MainWorkLoop();
+  thd_mgr_->MarkAsCompleted(this);
+}
+
+ThreadManager::WorkerThread::~WorkerThread() { thd_.join(); }
+
+ThreadManager::ThreadManager(int min_pollers, int max_pollers)
+    : shutdown_(false),
+      num_pollers_(0),
+      min_pollers_(min_pollers),
+      max_pollers_(max_pollers == -1 ? INT_MAX : max_pollers),
+      num_threads_(0) {}
+
+ThreadManager::~ThreadManager() {
+  {
+    std::unique_lock<std::mutex> lock(mu_);
+    GPR_ASSERT(num_threads_ == 0);
+  }
+
+  CleanupCompletedThreads();
+}
+
+void ThreadManager::Wait() {
+  std::unique_lock<std::mutex> lock(mu_);
+  while (num_threads_ != 0) {
+    shutdown_cv_.wait(lock);
+  }
+}
+
+void ThreadManager::Shutdown() {
+  std::unique_lock<std::mutex> lock(mu_);
+  shutdown_ = true;
+}
+
+bool ThreadManager::IsShutdown() {
+  std::unique_lock<std::mutex> lock(mu_);
+  return shutdown_;
+}
+
+void ThreadManager::MarkAsCompleted(WorkerThread* thd) {
+  {
+    std::unique_lock<std::mutex> list_lock(list_mu_);
+    completed_threads_.push_back(thd);
+  }
+
+  std::unique_lock<std::mutex> lock(mu_);
+  num_threads_--;
+  if (num_threads_ == 0) {
+    shutdown_cv_.notify_one();
+  }
+}
+
+void ThreadManager::CleanupCompletedThreads() {
+  std::unique_lock<std::mutex> lock(list_mu_);
+  for (auto thd = completed_threads_.begin(); thd != completed_threads_.end();
+       thd = completed_threads_.erase(thd)) {
+    delete *thd;
+  }
+}
+
+void ThreadManager::Initialize() {
+  for (int i = 0; i < min_pollers_; i++) {
+    MaybeCreatePoller();
+  }
+}
+
+// If the number of pollers (i.e threads currently blocked in PollForWork()) is
+// less than max threshold (i.e max_pollers_) and the total number of threads is
+// below the maximum threshold, we can let the current thread continue as poller
+bool ThreadManager::MaybeContinueAsPoller() {
+  std::unique_lock<std::mutex> lock(mu_);
+  if (shutdown_ || num_pollers_ > max_pollers_) {
+    return false;
+  }
+
+  num_pollers_++;
+  return true;
+}
+
+// Create a new poller if the current number of pollers i.e num_pollers_ (i.e
+// threads currently blocked in PollForWork()) is below the threshold (i.e
+// min_pollers_) and the total number of threads is below the maximum threshold
+void ThreadManager::MaybeCreatePoller() {
+  std::unique_lock<std::mutex> lock(mu_);
+  if (!shutdown_ && num_pollers_ < min_pollers_) {
+    num_pollers_++;
+    num_threads_++;
+
+    // Create a new thread (which ends up calling the MainWorkLoop() function
+    new WorkerThread(this);
+  }
+}
+
+void ThreadManager::MainWorkLoop() {
+  void* tag;
+  bool ok;
+
+  /*
+   1. Poll for work (i.e PollForWork())
+   2. After returning from PollForWork, reduce the number of pollers by 1. If
+      PollForWork() returned a TIMEOUT, then it may indicate that we have more
+      polling threads than needed. Check if the number of pollers is greater
+      than min_pollers and if so, terminate the thread.
+   3. Since we are short of one poller now, see if a new poller has to be
+      created (i.e see MaybeCreatePoller() for more details)
+   4. Do the actual work (DoWork())
+   5. After doing the work, see it this thread can resume polling work (i.e
+      see MaybeContinueAsPoller() for more details) */
+  do {
+    WorkStatus work_status = PollForWork(&tag, &ok);
+
+    {
+      std::unique_lock<std::mutex> lock(mu_);
+      num_pollers_--;
+
+      if (work_status == TIMEOUT && num_pollers_ > min_pollers_) {
+        break;
+      }
+    }
+
+    // Note that MaybeCreatePoller does check for shutdown and creates a new
+    // thread only if ThreadManager is not shutdown
+    if (work_status == WORK_FOUND) {
+      MaybeCreatePoller();
+      DoWork(tag, ok);
+    }
+  } while (MaybeContinueAsPoller());
+
+  CleanupCompletedThreads();
+
+  // If we are here, either ThreadManager is shutting down or it already has
+  // enough threads.
+}
+
+}  // namespace grpc
diff --git a/src/cpp/thread_manager/thread_manager.h b/src/cpp/thread_manager/thread_manager.h
new file mode 100644
index 0000000000..9c0569c62c
--- /dev/null
+++ b/src/cpp/thread_manager/thread_manager.h
@@ -0,0 +1,160 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CPP_THREAD_MANAGER_H
+#define GRPC_INTERNAL_CPP_THREAD_MANAGER_H
+
+#include <condition_variable>
+#include <list>
+#include <memory>
+#include <mutex>
+#include <thread>
+
+#include <grpc++/support/config.h>
+
+namespace grpc {
+
+class ThreadManager {
+ public:
+  explicit ThreadManager(int min_pollers, int max_pollers);
+  virtual ~ThreadManager();
+
+  // Initializes and Starts the Rpc Manager threads
+  void Initialize();
+
+  // The return type of PollForWork() function
+  enum WorkStatus { WORK_FOUND, SHUTDOWN, TIMEOUT };
+
+  // "Polls" for new work.
+  // If the return value is WORK_FOUND:
+  //  - The implementaion of PollForWork() MAY set some opaque identifier to
+  //    (identify the work item found) via the '*tag' parameter
+  //  - The implementaion MUST set the value of 'ok' to 'true' or 'false'. A
+  //    value of 'false' indicates some implemenation specific error (that is
+  //    neither SHUTDOWN nor TIMEOUT)
+  //  - ThreadManager does not interpret the values of 'tag' and 'ok'
+  //  - ThreadManager WILL call DoWork() and pass '*tag' and 'ok' as input to
+  //    DoWork()
+  //
+  // If the return value is SHUTDOWN:,
+  //  - ThreadManager WILL NOT call DoWork() and terminates the thead
+  //
+  // If the return value is TIMEOUT:,
+  //  - ThreadManager WILL NOT call DoWork()
+  //  - ThreadManager MAY terminate the thread depending on the current number
+  //    of active poller threads and mix_pollers/max_pollers settings
+  //  - Also, the value of timeout is specific to the derived class
+  //    implementation
+  virtual WorkStatus PollForWork(void** tag, bool* ok) = 0;
+
+  // The implementation of DoWork() is supposed to perform the work found by
+  // PollForWork(). The tag and ok parameters are the same as returned by
+  // PollForWork()
+  //
+  // The implementation of DoWork() should also do any setup needed to ensure
+  // that the next call to PollForWork() (not necessarily by the current thread)
+  // actually finds some work
+  virtual void DoWork(void* tag, bool ok) = 0;
+
+  // Mark the ThreadManager as shutdown and begin draining the work. This is a
+  // non-blocking call and the caller should call Wait(), a blocking call which
+  // returns only once the shutdown is complete
+  void Shutdown();
+
+  // Has Shutdown() been called
+  bool IsShutdown();
+
+  // A blocking call that returns only after the ThreadManager has shutdown and
+  // all the threads have drained all the outstanding work
+  void Wait();
+
+ private:
+  // Helper wrapper class around std::thread. This takes a ThreadManager object
+  // and starts a new std::thread to calls the Run() function.
+  //
+  // The Run() function calls ThreadManager::MainWorkLoop() function and once
+  // that completes, it marks the WorkerThread completed by calling
+  // ThreadManager::MarkAsCompleted()
+  class WorkerThread {
+   public:
+    WorkerThread(ThreadManager* thd_mgr);
+    ~WorkerThread();
+
+   private:
+    // Calls thd_mgr_->MainWorkLoop() and once that completes, calls
+    // thd_mgr_>MarkAsCompleted(this) to mark the thread as completed
+    void Run();
+
+    ThreadManager* thd_mgr_;
+    std::thread thd_;
+  };
+
+  // The main funtion in ThreadManager
+  void MainWorkLoop();
+
+  // Create a new poller if the number of current pollers is less than the
+  // minimum number of pollers needed (i.e min_pollers).
+  void MaybeCreatePoller();
+
+  // Returns true if the current thread can resume as a poller. i.e if the
+  // current number of pollers is less than the max_pollers.
+  bool MaybeContinueAsPoller();
+
+  void MarkAsCompleted(WorkerThread* thd);
+  void CleanupCompletedThreads();
+
+  // Protects shutdown_, num_pollers_ and num_threads_
+  // TODO: sreek - Change num_pollers and num_threads_ to atomics
+  std::mutex mu_;
+
+  bool shutdown_;
+  std::condition_variable shutdown_cv_;
+
+  // Number of threads doing polling
+  int num_pollers_;
+
+  // The minimum and maximum number of threads that should be doing polling
+  int min_pollers_;
+  int max_pollers_;
+
+  // The total number of threads (includes threads includes the threads that are
+  // currently polling i.e num_pollers_)
+  int num_threads_;
+
+  std::mutex list_mu_;
+  std::list<WorkerThread*> completed_threads_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPC_INTERNAL_CPP_THREAD_MANAGER_H
diff --git a/src/cpp/util/byte_buffer_cc.cc b/src/cpp/util/byte_buffer_cc.cc
index 91ed66b766..cbe0aad26c 100644
--- a/src/cpp/util/byte_buffer_cc.cc
+++ b/src/cpp/util/byte_buffer_cc.cc
@@ -38,18 +38,18 @@ namespace grpc {
 
 ByteBuffer::ByteBuffer(const Slice* slices, size_t nslices) {
   // The following assertions check that the representation of a grpc::Slice is
-  // identical to that of a gpr_slice:  it has a gpr_slice field, and nothing
+  // identical to that of a grpc_slice:  it has a grpc_slice field, and nothing
   // else.
-  static_assert(std::is_same<decltype(slices[0].slice_), gpr_slice>::value,
-                "Slice must have same representation as gpr_slice");
-  static_assert(sizeof(Slice) == sizeof(gpr_slice),
-                "Slice must have same representation as gpr_slice");
+  static_assert(std::is_same<decltype(slices[0].slice_), grpc_slice>::value,
+                "Slice must have same representation as grpc_slice");
+  static_assert(sizeof(Slice) == sizeof(grpc_slice),
+                "Slice must have same representation as grpc_slice");
   // The const_cast is legal if grpc_raw_byte_buffer_create() does no more
   // than its advertised side effect of increasing the reference count of the
   // slices it processes, and such an increase does not affect the semantics
   // seen by the caller of this constructor.
   buffer_ = grpc_raw_byte_buffer_create(
-      reinterpret_cast<gpr_slice*>(const_cast<Slice*>(slices)), nslices);
+      reinterpret_cast<grpc_slice*>(const_cast<Slice*>(slices)), nslices);
 }
 
 ByteBuffer::~ByteBuffer() {
@@ -75,7 +75,7 @@ Status ByteBuffer::Dump(std::vector<Slice>* slices) const {
     return Status(StatusCode::INTERNAL,
                   "Couldn't initialize byte buffer reader");
   }
-  gpr_slice s;
+  grpc_slice s;
   while (grpc_byte_buffer_reader_next(&reader, &s)) {
     slices->push_back(Slice(s, Slice::STEAL_REF));
   }
diff --git a/src/cpp/util/slice_cc.cc b/src/cpp/util/slice_cc.cc
index 7e88423b6c..c05f1cf124 100644
--- a/src/cpp/util/slice_cc.cc
+++ b/src/cpp/util/slice_cc.cc
@@ -37,12 +37,12 @@ namespace grpc {
 
 Slice::Slice() : slice_(gpr_empty_slice()) {}
 
-Slice::~Slice() { gpr_slice_unref(slice_); }
+Slice::~Slice() { grpc_slice_unref(slice_); }
 
-Slice::Slice(gpr_slice slice, AddRef) : slice_(gpr_slice_ref(slice)) {}
+Slice::Slice(grpc_slice slice, AddRef) : slice_(grpc_slice_ref(slice)) {}
 
-Slice::Slice(gpr_slice slice, StealRef) : slice_(slice) {}
+Slice::Slice(grpc_slice slice, StealRef) : slice_(slice) {}
 
-Slice::Slice(const Slice& other) : slice_(gpr_slice_ref(other.slice_)) {}
+Slice::Slice(const Slice& other) : slice_(grpc_slice_ref(other.slice_)) {}
 
 }  // namespace grpc
diff --git a/src/cpp/util/time_cc.cc b/src/cpp/util/time_cc.cc
index c43d848cc6..cd59a19703 100644
--- a/src/cpp/util/time_cc.cc
+++ b/src/cpp/util/time_cc.cc
@@ -32,9 +32,6 @@
  */
 
 #include <grpc++/support/config.h>
-
-#ifndef GRPC_CXX0X_NO_CHRONO
-
 #include <grpc++/support/time.h>
 #include <grpc/support/time.h>
 
@@ -91,5 +88,3 @@ system_clock::time_point Timespec2Timepoint(gpr_timespec t) {
 }
 
 }  // namespace grpc
-
-#endif  // !GRPC_CXX0X_NO_CHRONO
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index a44aaf1fdd..db55ed5a6c 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -29,15 +29,6 @@
     <WarningLevel>4</WarningLevel>
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Net" />
@@ -87,7 +78,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="Grpc.Auth.nuspec" />
     <None Include="Grpc.Auth.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
deleted file mode 100644
index a1f5668e2e..0000000000
--- a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
+++ /dev/null
@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<package>
-  <metadata>
-    <id>Grpc.Auth</id>
-    <title>gRPC C# Auth</title>
-    <summary>Auth library for C# implementation of gRPC - an RPC library and framework</summary>
-    <description>Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.</description>
-    <version>$version$</version>
-    <authors>Google Inc.</authors>
-    <owners>grpc-packages</owners>
-    <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
-    <projectUrl>https://github.com/grpc/grpc</projectUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>Release $version$ of gRPC C#</releaseNotes>
-    <copyright>Copyright 2015, Google Inc.</copyright>
-    <tags>gRPC RPC Protocol HTTP/2 Auth OAuth2</tags>
-	<dependencies>
-	  <dependency id="Google.Apis.Auth" version="1.15.0" />
-	  <dependency id="Grpc.Core" version="$version$" />
-    </dependencies>
-  </metadata>
-  <files>
-    <file src="bin/ReleaseSigned/Grpc.Auth.dll" target="lib/net45" />
-	<file src="bin/ReleaseSigned/Grpc.Auth.pdb" target="lib/net45" />
-	<file src="bin/ReleaseSigned/Grpc.Auth.xml" target="lib/net45" />
-	<file src="**\*.cs" target="src" />
-  </files>
-</package>
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 595e29f50a..4052ec8398 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -15,7 +15,6 @@
   "buildOptions": {
     "define": [ "SIGNED" ],
     "keyFile": "../keys/Grpc.snk",
-    "publicSign": true,
     "xmlDoc": true,
     "compile": {
       "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Core.Tests/CallOptionsTest.cs b/src/csharp/Grpc.Core.Tests/CallOptionsTest.cs
index 99a2d47e6e..3c3b9f7745 100644
--- a/src/csharp/Grpc.Core.Tests/CallOptionsTest.cs
+++ b/src/csharp/Grpc.Core.Tests/CallOptionsTest.cs
@@ -67,6 +67,9 @@ namespace Grpc.Core.Tests
             var credentials = new FakeCallCredentials();
             Assert.AreSame(credentials, options.WithCredentials(credentials).Credentials);
 
+            var flags = CallFlags.WaitForReady | CallFlags.CacheableRequest;
+            Assert.AreEqual(flags, options.WithFlags(flags).Flags);
+
             // Check that the original instance is unchanged.
             Assert.IsNull(options.Headers);
             Assert.IsNull(options.Deadline);
@@ -74,6 +77,7 @@ namespace Grpc.Core.Tests
             Assert.IsNull(options.WriteOptions);
             Assert.IsNull(options.PropagationToken);
             Assert.IsNull(options.Credentials);
+            Assert.AreEqual(default(CallFlags), options.Flags);
         }
 
         [Test]
@@ -94,5 +98,16 @@ namespace Grpc.Core.Tests
             Assert.AreEqual(token, new CallOptions(propagationToken: propagationToken2).Normalize().CancellationToken);
             Assert.Throws(typeof(ArgumentException), () => new CallOptions(cancellationToken: token, propagationToken: propagationToken2).Normalize());
         }
+
+        [Test]
+        public void WaitForReady()
+        {
+            var callOptions = new CallOptions();
+            Assert.IsFalse(callOptions.IsWaitForReady);
+
+            Assert.AreEqual(CallFlags.WaitForReady, callOptions.WithWaitForReady().Flags);
+            Assert.IsTrue(callOptions.WithWaitForReady().IsWaitForReady);
+            Assert.IsFalse(callOptions.WithWaitForReady(true).WithWaitForReady(false).IsWaitForReady);
+        }
     }
 }
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index d99bf8e4e1..646effe21a 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -25,29 +25,20 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
-    <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Core.Tests/Internal/FakeNativeCall.cs b/src/csharp/Grpc.Core.Tests/Internal/FakeNativeCall.cs
index 909112a47c..fe067fe8b0 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/FakeNativeCall.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/FakeNativeCall.cs
@@ -115,27 +115,27 @@ namespace Grpc.Core.Internal.Tests
             return "PEER";
         }
 
-        public void StartUnary(UnaryResponseClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartUnary(UnaryResponseClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             UnaryResponseClientHandler = callback;
         }
 
-        public void StartUnary(BatchContextSafeHandle ctx, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartUnary(BatchContextSafeHandle ctx, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             throw new NotImplementedException();
         }
 
-        public void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray)
+        public void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             UnaryResponseClientHandler = callback;
         }
 
-        public void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             ReceivedStatusOnClientHandler = callback;
         }
 
-        public void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray)
+        public void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             ReceivedStatusOnClientHandler = callback;
         }
diff --git a/src/csharp/Grpc.Core.Tests/SanityTest.cs b/src/csharp/Grpc.Core.Tests/SanityTest.cs
index f1eb13dffc..1c28277df5 100644
--- a/src/csharp/Grpc.Core.Tests/SanityTest.cs
+++ b/src/csharp/Grpc.Core.Tests/SanityTest.cs
@@ -115,7 +115,8 @@ namespace Grpc.Core.Tests
             var otherAssemblies = new[] {
                 "Grpc.Examples.Tests",
                 "Grpc.HealthCheck.Tests",
-                "Grpc.IntegrationTesting"
+                "Grpc.IntegrationTesting",
+                "Grpc.Reflection.Tests",
             };
             foreach (var assemblyName in otherAssemblies)
             {
diff --git a/src/csharp/Grpc.Core.Tests/packages.config b/src/csharp/Grpc.Core.Tests/packages.config
index 456ffcd8d0..4750735fad 100644
--- a/src/csharp/Grpc.Core.Tests/packages.config
+++ b/src/csharp/Grpc.Core.Tests/packages.config
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
   <package id="NUnit.ConsoleRunner" version="3.2.0" />
+  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
   <package id="OpenCover" version="4.6.519" />
   <package id="ReportGenerator" version="2.4.4.0" />
-</packages>
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+</packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index faf28dcee8..509084a71a 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -26,7 +25,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Core/CallOptions.cs b/src/csharp/Grpc.Core/CallOptions.cs
index 35548cfc96..ce43dae171 100644
--- a/src/csharp/Grpc.Core/CallOptions.cs
+++ b/src/csharp/Grpc.Core/CallOptions.cs
@@ -50,6 +50,7 @@ namespace Grpc.Core
         WriteOptions writeOptions;
         ContextPropagationToken propagationToken;
         CallCredentials credentials;
+        CallFlags flags;
 
         /// <summary>
         /// Creates a new instance of <c>CallOptions</c> struct.
@@ -69,6 +70,7 @@ namespace Grpc.Core
             this.writeOptions = writeOptions;
             this.propagationToken = propagationToken;
             this.credentials = credentials;
+            this.flags = default(CallFlags);
         }
 
         /// <summary>
@@ -126,6 +128,24 @@ namespace Grpc.Core
         }
 
         /// <summary>
+        /// If <c>true</c> and and channel is in <c>ChannelState.TransientFailure</c>, the call will attempt waiting for the channel to recover
+        /// instead of failing immediately (which is the default "FailFast" semantics).
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public bool IsWaitForReady
+        {
+            get { return (this.flags & CallFlags.WaitForReady) == CallFlags.WaitForReady; }
+        }
+
+        /// <summary>
+        /// Flags to use for this call.
+        /// </summary>
+        internal CallFlags Flags
+        {
+            get { return this.flags; }
+        }
+
+        /// <summary>
         /// Returns new instance of <see cref="CallOptions"/> with
         /// <c>Headers</c> set to the value provided. Values of all other fields are preserved.
         /// </summary>
@@ -198,6 +218,32 @@ namespace Grpc.Core
         }
 
         /// <summary>
+        /// Returns new instance of <see cref="CallOptions"/> with "WaitForReady" semantics enabled/disabled.
+        /// <see cref="IsWaitForReady"/>.
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public CallOptions WithWaitForReady(bool waitForReady = true)
+        {
+            if (waitForReady)
+            {
+                return WithFlags(this.flags | CallFlags.WaitForReady);
+            }
+            return WithFlags(this.flags & ~CallFlags.WaitForReady);
+        }
+
+        /// <summary>
+        /// Returns new instance of <see cref="CallOptions"/> with
+        /// <c>Flags</c> set to the value provided. Values of all other fields are preserved.
+        /// </summary>
+        /// <param name="flags">The call flags.</param>
+        internal CallOptions WithFlags(CallFlags flags)
+        {
+            var newOptions = this;
+            newOptions.flags = flags;
+            return newOptions;
+        }
+
+        /// <summary>
         /// Returns a new instance of <see cref="CallOptions"/> with 
         /// all previously unset values set to their defaults and deadline and cancellation
         /// token propagated when appropriate.
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index d315e6d667..23e1ddcf7f 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -27,20 +27,10 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <DefineConstants>SIGNED</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
@@ -140,9 +130,9 @@
     <Compile Include="Logging\LogLevelFilterLogger.cs" />
     <Compile Include="Internal\RequestCallContextSafeHandle.cs" />
     <Compile Include="Utils\TaskUtils.cs" />
+    <Compile Include="Internal\CallFlags.cs" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Grpc.Core.nuspec" />
     <None Include="Grpc.Core.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
@@ -154,4 +144,4 @@
       <Link>roots.pem</Link>
     </EmbeddedResource>
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
deleted file mode 100644
index a8459c4d9c..0000000000
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<package>
-  <metadata>
-    <id>Grpc.Core</id>
-    <title>gRPC C# Core</title>
-    <summary>Core C# implementation of gRPC - an RPC library and framework</summary>
-    <description>Core C# implementation of gRPC - an RPC library and framework. See project site for more info.</description>
-    <version>$version$</version>
-    <authors>Google Inc.</authors>
-    <owners>grpc-packages</owners>
-    <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
-    <projectUrl>https://github.com/grpc/grpc</projectUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>Release $version$ of gRPC C#</releaseNotes>
-    <copyright>Copyright 2015, Google Inc.</copyright>
-    <tags>gRPC RPC Protocol HTTP/2</tags>
-    <dependencies>
-      <dependency id="System.Interactive.Async" version="3.0.0" />
-    </dependencies>
-  </metadata>
-  <files>
-    <file src="bin/ReleaseSigned/Grpc.Core.dll" target="lib/net45" />
-    <file src="bin/ReleaseSigned/Grpc.Core.pdb" target="lib/net45" />
-    <file src="bin/ReleaseSigned/Grpc.Core.xml" target="lib/net45" />
-    <file src="**\*.cs" target="src" />
-    <file src="Grpc.Core.targets" target="\build\net45\Grpc.Core.targets" />
-    <!-- without backslashes in the the source path, nuget won't copy the files -->
-    <file src="..\nativelibs\windows_x86\grpc_csharp_ext.dll" target="/runtimes/win/native/grpc_csharp_ext.x86.dll" />
-    <file src="..\nativelibs\windows_x64\grpc_csharp_ext.dll" target="/runtimes/win/native/grpc_csharp_ext.x64.dll" />
-    <file src="..\nativelibs\linux_x86\libgrpc_csharp_ext.so" target="/runtimes/linux/native/libgrpc_csharp_ext.x86.so" />
-    <file src="..\nativelibs\linux_x64\libgrpc_csharp_ext.so" target="/runtimes/linux/native/libgrpc_csharp_ext.x64.so" />
-    <file src="..\nativelibs\macosx_x86\libgrpc_csharp_ext.dylib" target="/runtimes/osx/native/libgrpc_csharp_ext.x86.dylib" />
-    <file src="..\nativelibs\macosx_x64\libgrpc_csharp_ext.dylib" target="/runtimes/osx/native/libgrpc_csharp_ext.x64.dylib" />
-  </files>
-</package>
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCall.cs b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
index 5e61e9ec12..1f738a3b6f 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCall.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
@@ -106,7 +106,7 @@ namespace Grpc.Core.Internal
                 using (var metadataArray = MetadataArraySafeHandle.Create(details.Options.Headers))
                 using (var ctx = BatchContextSafeHandle.Create())
                 {
-                    call.StartUnary(ctx, payload, metadataArray, GetWriteFlagsForCall());
+                    call.StartUnary(ctx, payload, GetWriteFlagsForCall(), metadataArray, details.Options.Flags);
 
                     var ev = cq.Pluck(ctx.Handle);
 
@@ -150,7 +150,7 @@ namespace Grpc.Core.Internal
                 unaryResponseTcs = new TaskCompletionSource<TResponse>();
                 using (var metadataArray = MetadataArraySafeHandle.Create(details.Options.Headers))
                 {
-                    call.StartUnary(HandleUnaryResponse, payload, metadataArray, GetWriteFlagsForCall());
+                    call.StartUnary(HandleUnaryResponse, payload, GetWriteFlagsForCall(), metadataArray, details.Options.Flags);
                 }
                 return unaryResponseTcs.Task;
             }
@@ -174,7 +174,7 @@ namespace Grpc.Core.Internal
                 unaryResponseTcs = new TaskCompletionSource<TResponse>();
                 using (var metadataArray = MetadataArraySafeHandle.Create(details.Options.Headers))
                 {
-                    call.StartClientStreaming(HandleUnaryResponse, metadataArray);
+                    call.StartClientStreaming(HandleUnaryResponse, metadataArray, details.Options.Flags);
                 }
 
                 return unaryResponseTcs.Task;
@@ -200,7 +200,7 @@ namespace Grpc.Core.Internal
                 streamingResponseCallFinishedTcs = new TaskCompletionSource<object>();
                 using (var metadataArray = MetadataArraySafeHandle.Create(details.Options.Headers))
                 {
-                    call.StartServerStreaming(HandleFinished, payload, metadataArray, GetWriteFlagsForCall());
+                    call.StartServerStreaming(HandleFinished, payload, GetWriteFlagsForCall(), metadataArray, details.Options.Flags);
                 }
                 call.StartReceiveInitialMetadata(HandleReceivedResponseHeaders);
             }
@@ -222,7 +222,7 @@ namespace Grpc.Core.Internal
                 streamingResponseCallFinishedTcs = new TaskCompletionSource<object>();
                 using (var metadataArray = MetadataArraySafeHandle.Create(details.Options.Headers))
                 {
-                    call.StartDuplexStreaming(HandleFinished, metadataArray);
+                    call.StartDuplexStreaming(HandleFinished, metadataArray, details.Options.Flags);
                 }
                 call.StartReceiveInitialMetadata(HandleReceivedResponseHeaders);
             }
@@ -388,35 +388,29 @@ namespace Grpc.Core.Internal
 
         private void Initialize(CompletionQueueSafeHandle cq)
         {
-            using (Profilers.ForCurrentThread().NewScope("AsyncCall.Initialize"))
-            { 
-                var call = CreateNativeCall(cq);
+            var call = CreateNativeCall(cq);
 
-                details.Channel.AddCallReference(this);
-                InitializeInternal(call);
-                RegisterCancellationCallback();
-            }
+            details.Channel.AddCallReference(this);
+            InitializeInternal(call);
+            RegisterCancellationCallback();
         }
 
         private INativeCall CreateNativeCall(CompletionQueueSafeHandle cq)
         {
-            using (Profilers.ForCurrentThread().NewScope("AsyncCall.CreateNativeCall"))
-            { 
-                if (injectedNativeCall != null)
-                {
-                    return injectedNativeCall;  // allows injecting a mock INativeCall in tests.
-                }
+            if (injectedNativeCall != null)
+            {
+                return injectedNativeCall;  // allows injecting a mock INativeCall in tests.
+            }
 
-                var parentCall = details.Options.PropagationToken != null ? details.Options.PropagationToken.ParentCall : CallSafeHandle.NullInstance;
+            var parentCall = details.Options.PropagationToken != null ? details.Options.PropagationToken.ParentCall : CallSafeHandle.NullInstance;
 
-                var credentials = details.Options.Credentials;
-                using (var nativeCredentials = credentials != null ? credentials.ToNativeCredentials() : null)
-                {
-                    var result = details.Channel.Handle.CreateCall(
-                                 parentCall, ContextPropagationToken.DefaultMask, cq,
-                                 details.Method, details.Host, Timespec.FromDateTime(details.Options.Deadline.Value), nativeCredentials);
-                    return result;
-                }
+            var credentials = details.Options.Credentials;
+            using (var nativeCredentials = credentials != null ? credentials.ToNativeCredentials() : null)
+            {
+                var result = details.Channel.Handle.CreateCall(
+                             parentCall, ContextPropagationToken.DefaultMask, cq,
+                             details.Method, details.Host, Timespec.FromDateTime(details.Options.Deadline.Value), nativeCredentials);
+                return result;
             }
         }
 
@@ -456,47 +450,44 @@ namespace Grpc.Core.Internal
             // NOTE: because this event is a result of batch containing GRPC_OP_RECV_STATUS_ON_CLIENT,
             // success will be always set to true.
 
-            using (Profilers.ForCurrentThread().NewScope("AsyncCall.HandleUnaryResponse"))
+            TaskCompletionSource<object> delayedStreamingWriteTcs = null;
+            TResponse msg = default(TResponse);
+            var deserializeException = TryDeserialize(receivedMessage, out msg);
+
+            lock (myLock)
             {
-                TaskCompletionSource<object> delayedStreamingWriteTcs = null;
-                TResponse msg = default(TResponse);
-                var deserializeException = TryDeserialize(receivedMessage, out msg);
+                finished = true;
 
-                lock (myLock)
+                if (deserializeException != null && receivedStatus.Status.StatusCode == StatusCode.OK)
                 {
-                    finished = true;
-
-                    if (deserializeException != null && receivedStatus.Status.StatusCode == StatusCode.OK)
-                    {
-                        receivedStatus = new ClientSideStatus(DeserializeResponseFailureStatus, receivedStatus.Trailers);
-                    }
-                    finishedStatus = receivedStatus;
-
-                    if (isStreamingWriteCompletionDelayed)
-                    {
-                        delayedStreamingWriteTcs = streamingWriteTcs;
-                        streamingWriteTcs = null;
-                    }
-
-                    ReleaseResourcesIfPossible();
+                    receivedStatus = new ClientSideStatus(DeserializeResponseFailureStatus, receivedStatus.Trailers);
                 }
+                finishedStatus = receivedStatus;
 
-                responseHeadersTcs.SetResult(responseHeaders);
-
-                if (delayedStreamingWriteTcs != null)
+                if (isStreamingWriteCompletionDelayed)
                 {
-                    delayedStreamingWriteTcs.SetException(GetRpcExceptionClientOnly());
+                    delayedStreamingWriteTcs = streamingWriteTcs;
+                    streamingWriteTcs = null;
                 }
 
-                var status = receivedStatus.Status;
-                if (status.StatusCode != StatusCode.OK)
-                {
-                    unaryResponseTcs.SetException(new RpcException(status));
-                    return;
-                }
+                ReleaseResourcesIfPossible();
+            }
+
+            responseHeadersTcs.SetResult(responseHeaders);
 
-                unaryResponseTcs.SetResult(msg);
+            if (delayedStreamingWriteTcs != null)
+            {
+                delayedStreamingWriteTcs.SetException(GetRpcExceptionClientOnly());
+            }
+
+            var status = receivedStatus.Status;
+            if (status.StatusCode != StatusCode.OK)
+            {
+                unaryResponseTcs.SetException(new RpcException(status));
+                return;
             }
+
+            unaryResponseTcs.SetResult(msg);
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
index 9f9d260e7e..8668903f6e 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
@@ -181,19 +181,16 @@ namespace Grpc.Core.Internal
         /// </summary>
         protected bool ReleaseResourcesIfPossible()
         {
-            using (Profilers.ForCurrentThread().NewScope("AsyncCallBase.ReleaseResourcesIfPossible"))
+            if (!disposed && call != null)
             {
-                if (!disposed && call != null)
+                bool noMoreSendCompletions = streamingWriteTcs == null && (halfcloseRequested || cancelRequested || finished);
+                if (noMoreSendCompletions && readingDone && finished)
                 {
-                    bool noMoreSendCompletions = streamingWriteTcs == null && (halfcloseRequested || cancelRequested || finished);
-                    if (noMoreSendCompletions && readingDone && finished)
-                    {
-                        ReleaseResources();
-                        return true;
-                    }
+                    ReleaseResources();
+                    return true;
                 }
-                return false;
             }
+            return false;
         }
 
         protected abstract bool IsClient
@@ -229,28 +226,20 @@ namespace Grpc.Core.Internal
 
         protected byte[] UnsafeSerialize(TWrite msg)
         {
-            using (Profilers.ForCurrentThread().NewScope("AsyncCallBase.UnsafeSerialize"))
-            {
-                return serializer(msg);
-            }
+            return serializer(msg);
         }
 
         protected Exception TryDeserialize(byte[] payload, out TRead msg)
         {
-            using (Profilers.ForCurrentThread().NewScope("AsyncCallBase.TryDeserialize"))
+            try
             {
-                try
-                {
-                
-                    msg = deserializer(payload);
-                    return null;
-             
-                }
-                catch (Exception e)
-                {
-                    msg = default(TRead);
-                    return e;
-                }
+                msg = deserializer(payload);
+                return null;
+            }
+            catch (Exception e)
+            {
+                msg = default(TRead);
+                return e;
             }
         }
 
diff --git a/src/csharp/Grpc.Core/Internal/CallFlags.cs b/src/csharp/Grpc.Core/Internal/CallFlags.cs
new file mode 100644
index 0000000000..454fa9b1f4
--- /dev/null
+++ b/src/csharp/Grpc.Core/Internal/CallFlags.cs
@@ -0,0 +1,60 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// Flags to enable special call behaviors (client-side only).
+    /// </summary>
+    [Flags]
+    internal enum CallFlags
+    {
+        /// <summary>
+        /// The call is idempotent (retrying the call doesn't change the outcome of the operation).
+        /// </summary>
+        IdempotentRequest = 0x10,
+
+        /// <summary>
+        /// If channel is in <c>ChannelState.TransientFailure</c>, attempt waiting for the channel to recover
+        /// instead of failing the call immediately.
+        /// </summary>
+        WaitForReady = 0x20,
+
+        /// <summary>
+        /// The call is cacheable. gRPC is free to use GET verb */
+        /// </summary>
+        CacheableRequest = 0x40
+    }
+}
diff --git a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
index 82361f5797..6bfcc7fa74 100644
--- a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
@@ -63,53 +63,50 @@ namespace Grpc.Core.Internal
             Native.grpcsharp_call_set_credentials(this, credentials).CheckOk();
         }
 
-        public void StartUnary(UnaryResponseClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartUnary(UnaryResponseClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             using (completionQueue.NewScope())
             {
                 var ctx = BatchContextSafeHandle.Create();
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success, context.GetReceivedStatusOnClient(), context.GetReceivedMessage(), context.GetReceivedInitialMetadata()));
-                Native.grpcsharp_call_start_unary(this, ctx, payload, new UIntPtr((ulong)payload.Length), metadataArray, writeFlags)
+                Native.grpcsharp_call_start_unary(this, ctx, payload, new UIntPtr((ulong)payload.Length), writeFlags, metadataArray, callFlags)
                     .CheckOk();
             }
         }
 
-        public void StartUnary(BatchContextSafeHandle ctx, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartUnary(BatchContextSafeHandle ctx, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
-            using (Profilers.ForCurrentThread().NewScope("CallSafeHandle.StartUnary"))
-            {
-                Native.grpcsharp_call_start_unary(this, ctx, payload, new UIntPtr((ulong)payload.Length), metadataArray, writeFlags)
-                    .CheckOk();
-            }
+            Native.grpcsharp_call_start_unary(this, ctx, payload, new UIntPtr((ulong)payload.Length), writeFlags, metadataArray, callFlags)
+                .CheckOk();
         }
 
-        public void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray)
+        public void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             using (completionQueue.NewScope())
             {
                 var ctx = BatchContextSafeHandle.Create();
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success, context.GetReceivedStatusOnClient(), context.GetReceivedMessage(), context.GetReceivedInitialMetadata()));
-                Native.grpcsharp_call_start_client_streaming(this, ctx, metadataArray).CheckOk();
+                Native.grpcsharp_call_start_client_streaming(this, ctx, metadataArray, callFlags).CheckOk();
             }
         }
 
-        public void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
+        public void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             using (completionQueue.NewScope())
             {
                 var ctx = BatchContextSafeHandle.Create();
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success, context.GetReceivedStatusOnClient()));
-                Native.grpcsharp_call_start_server_streaming(this, ctx, payload, new UIntPtr((ulong)payload.Length), metadataArray, writeFlags).CheckOk();
+                Native.grpcsharp_call_start_server_streaming(this, ctx, payload, new UIntPtr((ulong)payload.Length), writeFlags, metadataArray, callFlags).CheckOk();
             }
         }
 
-        public void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray)
+        public void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags)
         {
             using (completionQueue.NewScope())
             {
                 var ctx = BatchContextSafeHandle.Create();
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success, context.GetReceivedStatusOnClient()));
-                Native.grpcsharp_call_start_duplex_streaming(this, ctx, metadataArray).CheckOk();
+                Native.grpcsharp_call_start_duplex_streaming(this, ctx, metadataArray, callFlags).CheckOk();
             }
         }
 
diff --git a/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
index 62864dff0c..0fb6360a23 100644
--- a/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
@@ -65,16 +65,13 @@ namespace Grpc.Core.Internal
 
         public CallSafeHandle CreateCall(CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline, CallCredentialsSafeHandle credentials)
         {
-            using (Profilers.ForCurrentThread().NewScope("ChannelSafeHandle.CreateCall"))
+            var result = Native.grpcsharp_channel_create_call(this, parentCall, propagationMask, cq, method, host, deadline);
+            if (credentials != null)
             {
-                var result = Native.grpcsharp_channel_create_call(this, parentCall, propagationMask, cq, method, host, deadline);
-                if (credentials != null)
-                {
-                    result.SetCredentials(credentials);
-                }
-                result.Initialize(cq);
-                return result;
+                result.SetCredentials(credentials);
             }
+            result.Initialize(cq);
+            return result;
         }
 
         public ChannelState CheckConnectivityState(bool tryToConnect)
diff --git a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
index 46f5624223..6c9a31921e 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
@@ -70,10 +70,7 @@ namespace Grpc.Core.Internal
 
         public CompletionQueueEvent Pluck(IntPtr tag)
         {
-            using (Profilers.ForCurrentThread().NewScope("CompletionQueueSafeHandle.Pluck"))
-            {
-                return Native.grpcsharp_completion_queue_pluck(this, tag);
-            }
+            return Native.grpcsharp_completion_queue_pluck(this, tag);
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
index a446c1f99f..25a6589f11 100644
--- a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
+++ b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
@@ -37,6 +37,7 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Grpc.Core.Logging;
+using Grpc.Core.Profiling;
 using Grpc.Core.Utils;
 
 namespace Grpc.Core.Internal
@@ -54,6 +55,8 @@ namespace Grpc.Core.Internal
         readonly int poolSize;
         readonly int completionQueueCount;
 
+        readonly List<BasicProfiler> threadProfilers = new List<BasicProfiler>();  // profilers assigned to threadpool threads
+
         bool stopRequested;
 
         IReadOnlyCollection<CompletionQueueSafeHandle> completionQueues;
@@ -82,7 +85,8 @@ namespace Grpc.Core.Internal
 
                 for (int i = 0; i < poolSize; i++)
                 {
-                    threads.Add(CreateAndStartThread(i));
+                    var optionalProfiler = i < threadProfilers.Count ? threadProfilers[i] : null;
+                    threads.Add(CreateAndStartThread(i, optionalProfiler));
                 }
             }
         }
@@ -111,6 +115,11 @@ namespace Grpc.Core.Internal
                 {
                     cq.Dispose();
                 }
+
+                for (int i = 0; i < threadProfilers.Count; i++)
+                {
+                    threadProfilers[i].Dump(string.Format("grpc_trace_thread_{0}.txt", i));
+                }
             });
         }
 
@@ -137,12 +146,12 @@ namespace Grpc.Core.Internal
             }
         }
 
-        private Thread CreateAndStartThread(int threadIndex)
+        private Thread CreateAndStartThread(int threadIndex, IProfiler optionalProfiler)
         {
             var cqIndex = threadIndex % completionQueues.Count;
             var cq = completionQueues.ElementAt(cqIndex);
 
-            var thread = new Thread(new ThreadStart(() => RunHandlerLoop(cq)));
+            var thread = new Thread(new ThreadStart(() => RunHandlerLoop(cq, optionalProfiler)));
             thread.IsBackground = true;
             thread.Name = string.Format("grpc {0} (cq {1})", threadIndex, cqIndex);
             thread.Start();
@@ -153,8 +162,13 @@ namespace Grpc.Core.Internal
         /// <summary>
         /// Body of the polling thread.
         /// </summary>
-        private void RunHandlerLoop(CompletionQueueSafeHandle cq)
+        private void RunHandlerLoop(CompletionQueueSafeHandle cq, IProfiler optionalProfiler)
         {
+            if (optionalProfiler != null)
+            {
+                Profilers.SetForCurrentThread(optionalProfiler);
+            }
+
             CompletionQueueEvent ev;
             do
             {
diff --git a/src/csharp/Grpc.Core/Internal/INativeCall.cs b/src/csharp/Grpc.Core/Internal/INativeCall.cs
index cd3719cb50..94fbb08feb 100644
--- a/src/csharp/Grpc.Core/Internal/INativeCall.cs
+++ b/src/csharp/Grpc.Core/Internal/INativeCall.cs
@@ -31,6 +31,7 @@
 #endregion
 
 using System;
+using Grpc.Core;
 
 namespace Grpc.Core.Internal
 {
@@ -54,19 +55,19 @@ namespace Grpc.Core.Internal
     {
         void Cancel();
 
-        void CancelWithStatus(Grpc.Core.Status status);
+        void CancelWithStatus(Status status);
 
         string GetPeer();
 
-        void StartUnary(UnaryResponseClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, Grpc.Core.WriteFlags writeFlags);
+        void StartUnary(UnaryResponseClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags);
 
-        void StartUnary(BatchContextSafeHandle ctx, byte[] payload, MetadataArraySafeHandle metadataArray, Grpc.Core.WriteFlags writeFlags);
+        void StartUnary(BatchContextSafeHandle ctx, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags);
 
-        void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray);
+        void StartClientStreaming(UnaryResponseClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags);
 
-        void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, Grpc.Core.WriteFlags writeFlags);
+        void StartServerStreaming(ReceivedStatusOnClientHandler callback, byte[] payload, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags callFlags);
 
-        void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray);
+        void StartDuplexStreaming(ReceivedStatusOnClientHandler callback, MetadataArraySafeHandle metadataArray, CallFlags callFlags);
 
         void StartReceiveMessage(ReceivedMessageHandler callback);
 
@@ -74,11 +75,11 @@ namespace Grpc.Core.Internal
 
         void StartSendInitialMetadata(SendCompletionHandler callback, MetadataArraySafeHandle metadataArray);
 
-        void StartSendMessage(SendCompletionHandler callback, byte[] payload, Grpc.Core.WriteFlags writeFlags, bool sendEmptyInitialMetadata);
+        void StartSendMessage(SendCompletionHandler callback, byte[] payload, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
 
         void StartSendCloseFromClient(SendCompletionHandler callback);
 
-        void StartSendStatusFromServer(SendCompletionHandler callback, Grpc.Core.Status status, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata, byte[] optionalPayload, Grpc.Core.WriteFlags writeFlags);
+        void StartSendStatusFromServer(SendCompletionHandler callback, Status status, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata, byte[] optionalPayload, WriteFlags writeFlags);
 
         void StartServerSide(ReceivedCloseOnServerHandler callback);
     }
diff --git a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
index dc9f62fdab..05dda5b148 100644
--- a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
@@ -48,22 +48,19 @@ namespace Grpc.Core.Internal
             
         public static MetadataArraySafeHandle Create(Metadata metadata)
         {
-            using (Profilers.ForCurrentThread().NewScope("MetadataArraySafeHandle.Create"))
+            if (metadata.Count == 0)
             {
-                if (metadata.Count == 0)
-                {
-                    return new MetadataArraySafeHandle();
-                }
+                return new MetadataArraySafeHandle();
+            }
 
-                // TODO(jtattermusch): we might wanna check that the metadata is readonly 
-                var metadataArray = Native.grpcsharp_metadata_array_create(new UIntPtr((ulong)metadata.Count));
-                for (int i = 0; i < metadata.Count; i++)
-                {
-                    var valueBytes = metadata[i].GetSerializedValueUnsafe();
-                    Native.grpcsharp_metadata_array_add(metadataArray, metadata[i].Key, valueBytes, new UIntPtr((ulong)valueBytes.Length));
-                }
-                return metadataArray;
+            // TODO(jtattermusch): we might wanna check that the metadata is readonly
+            var metadataArray = Native.grpcsharp_metadata_array_create(new UIntPtr((ulong)metadata.Count));
+            for (int i = 0; i < metadata.Count; i++)
+            {
+                var valueBytes = metadata[i].GetSerializedValueUnsafe();
+                Native.grpcsharp_metadata_array_add(metadataArray, metadata[i].Key, valueBytes, new UIntPtr((ulong)valueBytes.Length));
             }
+            return metadataArray;
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 40ba7e30cb..ce38e37093 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -325,14 +325,14 @@ namespace Grpc.Core.Internal
             public delegate CallError grpcsharp_call_cancel_delegate(CallSafeHandle call);
             public delegate CallError grpcsharp_call_cancel_with_status_delegate(CallSafeHandle call, StatusCode status, string description);
             public delegate CallError grpcsharp_call_start_unary_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags, MetadataArraySafeHandle metadataArray, CallFlags metadataFlags);
             public delegate CallError grpcsharp_call_start_client_streaming_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray, CallFlags metadataFlags);
             public delegate CallError grpcsharp_call_start_server_streaming_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen,
-                MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags,
+                MetadataArraySafeHandle metadataArray, CallFlags metadataFlags);
             public delegate CallError grpcsharp_call_start_duplex_streaming_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray, CallFlags metadataFlags);
             public delegate CallError grpcsharp_call_send_message_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
             public delegate CallError grpcsharp_call_send_close_from_client_delegate(CallSafeHandle call,
diff --git a/src/csharp/Grpc.Core/NativeDeps.targets b/src/csharp/Grpc.Core/NativeDeps.targets
index 66c5ec1292..e187f72d26 100644
--- a/src/csharp/Grpc.Core/NativeDeps.targets
+++ b/src/csharp/Grpc.Core/NativeDeps.targets
@@ -4,13 +4,11 @@
   <PropertyGroup Condition=" '$(NativeDependenciesConfiguration)' == '' ">
     <NativeDependenciesConfiguration Condition=" '$(Configuration)' == 'Debug' ">Debug</NativeDependenciesConfiguration>
     <NativeDependenciesConfiguration Condition=" '$(Configuration)' == 'Release' ">Release</NativeDependenciesConfiguration>
-    <NativeDependenciesConfiguration Condition=" '$(Configuration)' == 'ReleaseSigned' ">Release</NativeDependenciesConfiguration>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(NativeDependenciesConfigurationUnix)' == '' ">
     <NativeDependenciesConfigurationUnix Condition=" '$(Configuration)' == 'Debug' ">dbg</NativeDependenciesConfigurationUnix>
     <NativeDependenciesConfigurationUnix Condition=" '$(Configuration)' == 'Release' ">opt</NativeDependenciesConfigurationUnix>
-    <NativeDependenciesConfigurationUnix Condition=" '$(Configuration)' == 'ReleaseSigned' ">opt</NativeDependenciesConfigurationUnix>
   </PropertyGroup>
 
   <!-- Autodetect platform -->
diff --git a/src/csharp/Grpc.Core/Profiling/Profilers.cs b/src/csharp/Grpc.Core/Profiling/Profilers.cs
index aa0d96c0e0..6afabff6a7 100644
--- a/src/csharp/Grpc.Core/Profiling/Profilers.cs
+++ b/src/csharp/Grpc.Core/Profiling/Profilers.cs
@@ -80,7 +80,7 @@ namespace Grpc.Core.Profiling
         ProfilerEntry[] entries;
         int count;
 
-        public BasicProfiler() : this(1024*1024)
+        public BasicProfiler() : this(20*1024*1024)
         {
         }
 
diff --git a/src/csharp/Grpc.Core/packages.config b/src/csharp/Grpc.Core/packages.config
index 6514774021..53cfad52f0 100644
--- a/src/csharp/Grpc.Core/packages.config
+++ b/src/csharp/Grpc.Core/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index aa1e4cc7fb..4405ecc5a2 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -27,11 +27,10 @@
     "embed": [ "../../../etc/roots.pem" ],
     "define": [ "SIGNED" ],
     "keyFile": "../keys/Grpc.snk",
-    "publicSign": true,
     "xmlDoc": true
   },
   "dependencies": {
-    "System.Interactive.Async": "3.0.0"
+    "System.Interactive.Async": "3.1.1"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Dotnet.sln b/src/csharp/Grpc.Dotnet.sln
index 98b3cd54ab..824c6822f7 100644
--- a/src/csharp/Grpc.Dotnet.sln
+++ b/src/csharp/Grpc.Dotnet.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.25123.0
+VisualStudioVersion = 14.0.25420.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Core", "Grpc.Core\Grpc.Core.xproj", "{DC9908B6-F291-4FC8-A46D-2EA2551790EC}"
 EndProject
@@ -31,6 +31,10 @@ Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.Ser
 EndProject
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.StressClient", "Grpc.IntegrationTesting.StressClient\Grpc.IntegrationTesting.StressClient.xproj", "{0EBC910B-8867-4D3E-8686-91F34183D839}"
 EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Reflection", "Grpc.Reflection\Grpc.Reflection.xproj", "{2B372155-80BA-4CF9-82D6-4B938E8EC3A0}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Reflection.Tests", "Grpc.Reflection.Tests\Grpc.Reflection.Tests.xproj", "{FE90181D-A4B3-4A5C-8490-F07561E18E3B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -93,6 +97,14 @@ Global
 		{0EBC910B-8867-4D3E-8686-91F34183D839}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0EBC910B-8867-4D3E-8686-91F34183D839}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0EBC910B-8867-4D3E-8686-91F34183D839}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2B372155-80BA-4CF9-82D6-4B938E8EC3A0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2B372155-80BA-4CF9-82D6-4B938E8EC3A0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2B372155-80BA-4CF9-82D6-4B938E8EC3A0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2B372155-80BA-4CF9-82D6-4B938E8EC3A0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FE90181D-A4B3-4A5C-8490-F07561E18E3B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FE90181D-A4B3-4A5C-8490-F07561E18E3B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FE90181D-A4B3-4A5C-8490-F07561E18E3B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FE90181D-A4B3-4A5C-8490-F07561E18E3B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
index 65bf236def..de4005c2f6 100644
--- a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
@@ -27,15 +27,6 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 628f532966..9a8880b5d4 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -26,7 +25,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
index 26b42b6936..3f38de2b71 100644
--- a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
@@ -27,15 +27,6 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 628f532966..9a8880b5d4 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -26,7 +25,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index a114d96127..d22fe87825 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -25,29 +25,20 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
-    <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
     <Reference Include="Google.Protobuf">
       <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index f14517d2e2..0fed4dbd41 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -3,5 +3,5 @@
   <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 0109617e6b..3e130beeac 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -26,7 +25,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index dcbef5fc0b..44acb6c2e3 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -27,28 +27,18 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data.Linq" />
-    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="Google.Protobuf">
       <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples/Math.cs b/src/csharp/Grpc.Examples/Math.cs
index fae4fd3c26..e5b76f8305 100644
--- a/src/csharp/Grpc.Examples/Math.cs
+++ b/src/csharp/Grpc.Examples/Math.cs
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: math.proto
+// source: math/math.proto
 #pragma warning disable 1591, 0612, 3021
 #region Designer generated code
 
@@ -9,11 +9,11 @@ using pbr = global::Google.Protobuf.Reflection;
 using scg = global::System.Collections.Generic;
 namespace Math {
 
-  /// <summary>Holder for reflection information generated from math.proto</summary>
+  /// <summary>Holder for reflection information generated from math/math.proto</summary>
   public static partial class MathReflection {
 
     #region Descriptor
-    /// <summary>File descriptor for math.proto</summary>
+    /// <summary>File descriptor for math/math.proto</summary>
     public static pbr::FileDescriptor Descriptor {
       get { return descriptor; }
     }
@@ -22,15 +22,15 @@ namespace Math {
     static MathReflection() {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
-            "CgptYXRoLnByb3RvEgRtYXRoIiwKB0RpdkFyZ3MSEAoIZGl2aWRlbmQYASAB",
-            "KAMSDwoHZGl2aXNvchgCIAEoAyIvCghEaXZSZXBseRIQCghxdW90aWVudBgB",
-            "IAEoAxIRCglyZW1haW5kZXIYAiABKAMiGAoHRmliQXJncxINCgVsaW1pdBgB",
-            "IAEoAyISCgNOdW0SCwoDbnVtGAEgASgDIhkKCEZpYlJlcGx5Eg0KBWNvdW50",
-            "GAEgASgDMqQBCgRNYXRoEiYKA0RpdhINLm1hdGguRGl2QXJncxoOLm1hdGgu",
-            "RGl2UmVwbHkiABIuCgdEaXZNYW55Eg0ubWF0aC5EaXZBcmdzGg4ubWF0aC5E",
-            "aXZSZXBseSIAKAEwARIjCgNGaWISDS5tYXRoLkZpYkFyZ3MaCS5tYXRoLk51",
-            "bSIAMAESHwoDU3VtEgkubWF0aC5OdW0aCS5tYXRoLk51bSIAKAFiBnByb3Rv",
-            "Mw=="));
+            "Cg9tYXRoL21hdGgucHJvdG8SBG1hdGgiLAoHRGl2QXJncxIQCghkaXZpZGVu",
+            "ZBgBIAEoAxIPCgdkaXZpc29yGAIgASgDIi8KCERpdlJlcGx5EhAKCHF1b3Rp",
+            "ZW50GAEgASgDEhEKCXJlbWFpbmRlchgCIAEoAyIYCgdGaWJBcmdzEg0KBWxp",
+            "bWl0GAEgASgDIhIKA051bRILCgNudW0YASABKAMiGQoIRmliUmVwbHkSDQoF",
+            "Y291bnQYASABKAMypAEKBE1hdGgSJgoDRGl2Eg0ubWF0aC5EaXZBcmdzGg4u",
+            "bWF0aC5EaXZSZXBseSIAEi4KB0Rpdk1hbnkSDS5tYXRoLkRpdkFyZ3MaDi5t",
+            "YXRoLkRpdlJlcGx5IgAoATABEiMKA0ZpYhINLm1hdGguRmliQXJncxoJLm1h",
+            "dGguTnVtIgAwARIfCgNTdW0SCS5tYXRoLk51bRoJLm1hdGguTnVtIgAoAWIG",
+            "cHJvdG8z"));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
           new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index d6ba61e7dc..3364b8ce8e 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: math.proto
+// source: math/math.proto
 // Original file comments:
 // Copyright 2015, Google Inc.
 // All rights reserved.
@@ -38,7 +38,7 @@ using System.Threading.Tasks;
 using Grpc.Core;
 
 namespace Math {
-  public static class Math
+  public static partial class Math
   {
     static readonly string __ServiceName = "math.Math";
 
@@ -82,42 +82,56 @@ namespace Math {
     }
 
     /// <summary>Base class for server-side implementations of Math</summary>
-    public abstract class MathBase
+    public abstract partial class MathBase
     {
       /// <summary>
-      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
-      ///  and remainder.
+      /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      /// and remainder.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Math.DivReply> Div(global::Math.DivArgs request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
+      /// DivMany accepts an arbitrary number of division args from the client stream
+      /// and sends back the results in the reply stream.  The stream continues until
+      /// the client closes its end; the server does the same after sending all the
+      /// replies.  The stream ends immediately if either end aborts.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task DivMany(IAsyncStreamReader<global::Math.DivArgs> requestStream, IServerStreamWriter<global::Math.DivReply> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
+      /// Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
+      /// generates up to limit numbers; otherwise it continues until the call is
+      /// canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task Fib(global::Math.FibArgs request, IServerStreamWriter<global::Math.Num> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
+      /// Sum sums a stream of numbers, returning the final result once the stream
+      /// is closed.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Math.Num> Sum(IAsyncStreamReader<global::Math.Num> requestStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -126,7 +140,7 @@ namespace Math {
     }
 
     /// <summary>Client for Math</summary>
-    public class MathClient : ClientBase<MathClient>
+    public partial class MathClient : ClientBase<MathClient>
     {
       /// <summary>Creates a new client for Math</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -149,87 +163,123 @@ namespace Math {
       }
 
       /// <summary>
-      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
-      ///  and remainder.
+      /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      /// and remainder.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Math.DivReply Div(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return Div(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
-      ///  and remainder.
+      /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      /// and remainder.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Math.DivReply Div(global::Math.DivArgs request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Div, null, options, request);
       }
       /// <summary>
-      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
-      ///  and remainder.
+      /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      /// and remainder.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return DivAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
-      ///  and remainder.
+      /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      /// and remainder.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_Div, null, options, request);
       }
       /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
+      /// DivMany accepts an arbitrary number of division args from the client stream
+      /// and sends back the results in the reply stream.  The stream continues until
+      /// the client closes its end; the server does the same after sending all the
+      /// replies.  The stream ends immediately if either end aborts.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return DivMany(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
+      /// DivMany accepts an arbitrary number of division args from the client stream
+      /// and sends back the results in the reply stream.  The stream continues until
+      /// the client closes its end; the server does the same after sending all the
+      /// replies.  The stream ends immediately if either end aborts.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_DivMany, null, options);
       }
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
+      /// Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
+      /// generates up to limit numbers; otherwise it continues until the call is
+      /// canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return Fib(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
+      /// Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
+      /// generates up to limit numbers; otherwise it continues until the call is
+      /// canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_Fib, null, options, request);
       }
       /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
+      /// Sum sums a stream of numbers, returning the final result once the stream
+      /// is closed.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return Sum(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
+      /// Sum sums a stream of numbers, returning the final result once the stream
+      /// is closed.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(CallOptions options)
       {
         return CallInvoker.AsyncClientStreamingCall(__Method_Sum, null, options);
@@ -242,6 +292,7 @@ namespace Math {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(MathBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index d17347f08f..c7db26bd64 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -2,5 +2,5 @@
 <packages>
   <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index 93c3b3a55f..b82f976861 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -27,15 +27,6 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 66dcd79a39..addc782afe 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -26,7 +25,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index 54a2984964..63aa18584d 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -28,22 +28,9 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
@@ -52,6 +39,9 @@
     <Reference Include="Google.Protobuf">
       <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -63,13 +53,12 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Grpc.HealthCheck.nuspec" />
     <None Include="Grpc.HealthCheck.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Grpc.Core\Grpc.Core.csproj">
-      <Project>{ccc4440e-49f7-4790-b0af-feabb0837ae7}</Project>
+      <Project>{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}</Project>
       <Name>Grpc.Core</Name>
     </ProjectReference>
   </ItemGroup>
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
deleted file mode 100644
index 4ffd18ccb2..0000000000
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
+++ /dev/null
@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<package>
-  <metadata>
-    <id>Grpc.HealthCheck</id>
-    <title>gRPC C# Healthchecking</title>
-    <summary>Implementation of gRPC health service</summary>
-    <description>Example implementation of grpc.health.v1 service that can be used for health-checking.</description>
-    <version>$version$</version>
-    <authors>Google Inc.</authors>
-    <owners>grpc-packages</owners>
-    <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
-    <projectUrl>https://github.com/grpc/grpc</projectUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <copyright>Copyright 2015, Google Inc.</copyright>
-    <tags>gRPC health check</tags>
-	<dependencies>
-	  <dependency id="Google.Protobuf" version="$ProtobufVersion$" />
-	  <dependency id="Grpc.Core" version="$version$" />
-	  <dependency id="System.Interactive.Async" version="3.0.0" />
-    </dependencies>
-  </metadata>
-  <files>
-    <file src="bin/ReleaseSigned/Grpc.HealthCheck.dll" target="lib/net45" />
-	<file src="bin/ReleaseSigned/Grpc.HealthCheck.pdb" target="lib/net45" />
-	<file src="bin/ReleaseSigned/Grpc.HealthCheck.xml" target="lib/net45" />
-	<file src="**\*.cs" target="src" />
-  </files>
-</package>
diff --git a/src/csharp/Grpc.HealthCheck/Health.cs b/src/csharp/Grpc.HealthCheck/Health.cs
index b8e2e2274c..b9880d9636 100644
--- a/src/csharp/Grpc.HealthCheck/Health.cs
+++ b/src/csharp/Grpc.HealthCheck/Health.cs
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: health.proto
+// source: grpc/health/v1/health.proto
 #pragma warning disable 1591, 0612, 3021
 #region Designer generated code
 
@@ -9,11 +9,11 @@ using pbr = global::Google.Protobuf.Reflection;
 using scg = global::System.Collections.Generic;
 namespace Grpc.Health.V1 {
 
-  /// <summary>Holder for reflection information generated from health.proto</summary>
+  /// <summary>Holder for reflection information generated from grpc/health/v1/health.proto</summary>
   public static partial class HealthReflection {
 
     #region Descriptor
-    /// <summary>File descriptor for health.proto</summary>
+    /// <summary>File descriptor for grpc/health/v1/health.proto</summary>
     public static pbr::FileDescriptor Descriptor {
       get { return descriptor; }
     }
@@ -22,14 +22,14 @@ namespace Grpc.Health.V1 {
     static HealthReflection() {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
-            "CgxoZWFsdGgucHJvdG8SDmdycGMuaGVhbHRoLnYxIiUKEkhlYWx0aENoZWNr",
-            "UmVxdWVzdBIPCgdzZXJ2aWNlGAEgASgJIpQBChNIZWFsdGhDaGVja1Jlc3Bv",
-            "bnNlEkEKBnN0YXR1cxgBIAEoDjIxLmdycGMuaGVhbHRoLnYxLkhlYWx0aENo",
-            "ZWNrUmVzcG9uc2UuU2VydmluZ1N0YXR1cyI6Cg1TZXJ2aW5nU3RhdHVzEgsK",
-            "B1VOS05PV04QABILCgdTRVJWSU5HEAESDwoLTk9UX1NFUlZJTkcQAjJaCgZI",
-            "ZWFsdGgSUAoFQ2hlY2sSIi5ncnBjLmhlYWx0aC52MS5IZWFsdGhDaGVja1Jl",
-            "cXVlc3QaIy5ncnBjLmhlYWx0aC52MS5IZWFsdGhDaGVja1Jlc3BvbnNlQhGq",
-            "Ag5HcnBjLkhlYWx0aC5WMWIGcHJvdG8z"));
+            "ChtncnBjL2hlYWx0aC92MS9oZWFsdGgucHJvdG8SDmdycGMuaGVhbHRoLnYx",
+            "IiUKEkhlYWx0aENoZWNrUmVxdWVzdBIPCgdzZXJ2aWNlGAEgASgJIpQBChNI",
+            "ZWFsdGhDaGVja1Jlc3BvbnNlEkEKBnN0YXR1cxgBIAEoDjIxLmdycGMuaGVh",
+            "bHRoLnYxLkhlYWx0aENoZWNrUmVzcG9uc2UuU2VydmluZ1N0YXR1cyI6Cg1T",
+            "ZXJ2aW5nU3RhdHVzEgsKB1VOS05PV04QABILCgdTRVJWSU5HEAESDwoLTk9U",
+            "X1NFUlZJTkcQAjJaCgZIZWFsdGgSUAoFQ2hlY2sSIi5ncnBjLmhlYWx0aC52",
+            "MS5IZWFsdGhDaGVja1JlcXVlc3QaIy5ncnBjLmhlYWx0aC52MS5IZWFsdGhD",
+            "aGVja1Jlc3BvbnNlQhGqAg5HcnBjLkhlYWx0aC5WMWIGcHJvdG8z"));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
           new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index b2a35a79be..020c2df565 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: health.proto
+// source: grpc/health/v1/health.proto
 // Original file comments:
 // Copyright 2015, Google Inc.
 // All rights reserved.
@@ -38,7 +38,7 @@ using System.Threading.Tasks;
 using Grpc.Core;
 
 namespace Grpc.Health.V1 {
-  public static class Health
+  public static partial class Health
   {
     static readonly string __ServiceName = "grpc.health.v1.Health";
 
@@ -59,7 +59,7 @@ namespace Grpc.Health.V1 {
     }
 
     /// <summary>Base class for server-side implementations of Health</summary>
-    public abstract class HealthBase
+    public abstract partial class HealthBase
     {
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Health.V1.HealthCheckResponse> Check(global::Grpc.Health.V1.HealthCheckRequest request, ServerCallContext context)
       {
@@ -69,7 +69,7 @@ namespace Grpc.Health.V1 {
     }
 
     /// <summary>Client for Health</summary>
-    public class HealthClient : ClientBase<HealthClient>
+    public partial class HealthClient : ClientBase<HealthClient>
     {
       /// <summary>Creates a new client for Health</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -115,6 +115,7 @@ namespace Grpc.Health.V1 {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(HealthBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index f8e353bf26..5ab40b7a8c 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 9d631229d8..8f1237d003 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -15,7 +15,6 @@
   "buildOptions": {
     "define": [ "SIGNED" ],
     "keyFile": "../keys/Grpc.snk",
-    "publicSign": true,
     "xmlDoc": true,
     "compile": {
       "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index ae58073b52..6bb5f33966 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -29,15 +29,6 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Net" />
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 1b900c8af3..ad81cbc48b 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -29,7 +28,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
index 593bf0939d..3b9587e315 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
@@ -27,15 +27,6 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index fe200f8d44..2c7643b74f 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -29,7 +28,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index d5c40ba948..081dc24fbf 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -29,15 +29,6 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Net" />
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 1b900c8af3..ad81cbc48b 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -29,7 +28,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
index 8bd3d78913..0f28340450 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
@@ -27,15 +27,6 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 1b900c8af3..ad81cbc48b 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -29,7 +28,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.IntegrationTesting/Control.cs b/src/csharp/Grpc.IntegrationTesting/Control.cs
index 7928b51ba5..3f4862d567 100644
--- a/src/csharp/Grpc.IntegrationTesting/Control.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Control.cs
@@ -45,44 +45,48 @@ namespace Grpc.Testing {
             "dGF0cxgBIAEoCzIZLmdycGMudGVzdGluZy5DbGllbnRTdGF0cyIVCgRNYXJr",
             "Eg0KBXJlc2V0GAEgASgIImgKCkNsaWVudEFyZ3MSKwoFc2V0dXAYASABKAsy",
             "Gi5ncnBjLnRlc3RpbmcuQ2xpZW50Q29uZmlnSAASIgoEbWFyaxgCIAEoCzIS",
-            "LmdycGMudGVzdGluZy5NYXJrSABCCQoHYXJndHlwZSKWAgoMU2VydmVyQ29u",
+            "LmdycGMudGVzdGluZy5NYXJrSABCCQoHYXJndHlwZSK0AgoMU2VydmVyQ29u",
             "ZmlnEi0KC3NlcnZlcl90eXBlGAEgASgOMhguZ3JwYy50ZXN0aW5nLlNlcnZl",
             "clR5cGUSNQoPc2VjdXJpdHlfcGFyYW1zGAIgASgLMhwuZ3JwYy50ZXN0aW5n",
             "LlNlY3VyaXR5UGFyYW1zEgwKBHBvcnQYBCABKAUSHAoUYXN5bmNfc2VydmVy",
             "X3RocmVhZHMYByABKAUSEgoKY29yZV9saW1pdBgIIAEoBRIzCg5wYXlsb2Fk",
             "X2NvbmZpZxgJIAEoCzIbLmdycGMudGVzdGluZy5QYXlsb2FkQ29uZmlnEhEK",
-            "CWNvcmVfbGlzdBgKIAMoBRIYChBvdGhlcl9zZXJ2ZXJfYXBpGAsgASgJImgK",
-            "ClNlcnZlckFyZ3MSKwoFc2V0dXAYASABKAsyGi5ncnBjLnRlc3RpbmcuU2Vy",
-            "dmVyQ29uZmlnSAASIgoEbWFyaxgCIAEoCzISLmdycGMudGVzdGluZy5NYXJr",
-            "SABCCQoHYXJndHlwZSJVCgxTZXJ2ZXJTdGF0dXMSKAoFc3RhdHMYASABKAsy",
-            "GS5ncnBjLnRlc3RpbmcuU2VydmVyU3RhdHMSDAoEcG9ydBgCIAEoBRINCgVj",
-            "b3JlcxgDIAEoBSINCgtDb3JlUmVxdWVzdCIdCgxDb3JlUmVzcG9uc2USDQoF",
-            "Y29yZXMYASABKAUiBgoEVm9pZCL9AQoIU2NlbmFyaW8SDAoEbmFtZRgBIAEo",
-            "CRIxCg1jbGllbnRfY29uZmlnGAIgASgLMhouZ3JwYy50ZXN0aW5nLkNsaWVu",
-            "dENvbmZpZxITCgtudW1fY2xpZW50cxgDIAEoBRIxCg1zZXJ2ZXJfY29uZmln",
-            "GAQgASgLMhouZ3JwYy50ZXN0aW5nLlNlcnZlckNvbmZpZxITCgtudW1fc2Vy",
-            "dmVycxgFIAEoBRIWCg53YXJtdXBfc2Vjb25kcxgGIAEoBRIZChFiZW5jaG1h",
-            "cmtfc2Vjb25kcxgHIAEoBRIgChhzcGF3bl9sb2NhbF93b3JrZXJfY291bnQY",
-            "CCABKAUiNgoJU2NlbmFyaW9zEikKCXNjZW5hcmlvcxgBIAMoCzIWLmdycGMu",
-            "dGVzdGluZy5TY2VuYXJpbyKSAgoVU2NlbmFyaW9SZXN1bHRTdW1tYXJ5EgsK",
-            "A3FwcxgBIAEoARIbChNxcHNfcGVyX3NlcnZlcl9jb3JlGAIgASgBEhoKEnNl",
-            "cnZlcl9zeXN0ZW1fdGltZRgDIAEoARIYChBzZXJ2ZXJfdXNlcl90aW1lGAQg",
-            "ASgBEhoKEmNsaWVudF9zeXN0ZW1fdGltZRgFIAEoARIYChBjbGllbnRfdXNl",
-            "cl90aW1lGAYgASgBEhIKCmxhdGVuY3lfNTAYByABKAESEgoKbGF0ZW5jeV85",
-            "MBgIIAEoARISCgpsYXRlbmN5Xzk1GAkgASgBEhIKCmxhdGVuY3lfOTkYCiAB",
-            "KAESEwoLbGF0ZW5jeV85OTkYCyABKAEiyAIKDlNjZW5hcmlvUmVzdWx0EigK",
-            "CHNjZW5hcmlvGAEgASgLMhYuZ3JwYy50ZXN0aW5nLlNjZW5hcmlvEi4KCWxh",
-            "dGVuY2llcxgCIAEoCzIbLmdycGMudGVzdGluZy5IaXN0b2dyYW1EYXRhEi8K",
-            "DGNsaWVudF9zdGF0cxgDIAMoCzIZLmdycGMudGVzdGluZy5DbGllbnRTdGF0",
-            "cxIvCgxzZXJ2ZXJfc3RhdHMYBCADKAsyGS5ncnBjLnRlc3RpbmcuU2VydmVy",
-            "U3RhdHMSFAoMc2VydmVyX2NvcmVzGAUgAygFEjQKB3N1bW1hcnkYBiABKAsy",
-            "Iy5ncnBjLnRlc3RpbmcuU2NlbmFyaW9SZXN1bHRTdW1tYXJ5EhYKDmNsaWVu",
-            "dF9zdWNjZXNzGAcgAygIEhYKDnNlcnZlcl9zdWNjZXNzGAggAygIKkEKCkNs",
-            "aWVudFR5cGUSDwoLU1lOQ19DTElFTlQQABIQCgxBU1lOQ19DTElFTlQQARIQ",
-            "CgxPVEhFUl9DTElFTlQQAipbCgpTZXJ2ZXJUeXBlEg8KC1NZTkNfU0VSVkVS",
-            "EAASEAoMQVNZTkNfU0VSVkVSEAESGAoUQVNZTkNfR0VORVJJQ19TRVJWRVIQ",
-            "AhIQCgxPVEhFUl9TRVJWRVIQAyojCgdScGNUeXBlEgkKBVVOQVJZEAASDQoJ",
-            "U1RSRUFNSU5HEAFiBnByb3RvMw=="));
+            "CWNvcmVfbGlzdBgKIAMoBRIYChBvdGhlcl9zZXJ2ZXJfYXBpGAsgASgJEhwK",
+            "E3Jlc291cmNlX3F1b3RhX3NpemUY6QcgASgFImgKClNlcnZlckFyZ3MSKwoF",
+            "c2V0dXAYASABKAsyGi5ncnBjLnRlc3RpbmcuU2VydmVyQ29uZmlnSAASIgoE",
+            "bWFyaxgCIAEoCzISLmdycGMudGVzdGluZy5NYXJrSABCCQoHYXJndHlwZSJV",
+            "CgxTZXJ2ZXJTdGF0dXMSKAoFc3RhdHMYASABKAsyGS5ncnBjLnRlc3Rpbmcu",
+            "U2VydmVyU3RhdHMSDAoEcG9ydBgCIAEoBRINCgVjb3JlcxgDIAEoBSINCgtD",
+            "b3JlUmVxdWVzdCIdCgxDb3JlUmVzcG9uc2USDQoFY29yZXMYASABKAUiBgoE",
+            "Vm9pZCL9AQoIU2NlbmFyaW8SDAoEbmFtZRgBIAEoCRIxCg1jbGllbnRfY29u",
+            "ZmlnGAIgASgLMhouZ3JwYy50ZXN0aW5nLkNsaWVudENvbmZpZxITCgtudW1f",
+            "Y2xpZW50cxgDIAEoBRIxCg1zZXJ2ZXJfY29uZmlnGAQgASgLMhouZ3JwYy50",
+            "ZXN0aW5nLlNlcnZlckNvbmZpZxITCgtudW1fc2VydmVycxgFIAEoBRIWCg53",
+            "YXJtdXBfc2Vjb25kcxgGIAEoBRIZChFiZW5jaG1hcmtfc2Vjb25kcxgHIAEo",
+            "BRIgChhzcGF3bl9sb2NhbF93b3JrZXJfY291bnQYCCABKAUiNgoJU2NlbmFy",
+            "aW9zEikKCXNjZW5hcmlvcxgBIAMoCzIWLmdycGMudGVzdGluZy5TY2VuYXJp",
+            "byL4AgoVU2NlbmFyaW9SZXN1bHRTdW1tYXJ5EgsKA3FwcxgBIAEoARIbChNx",
+            "cHNfcGVyX3NlcnZlcl9jb3JlGAIgASgBEhoKEnNlcnZlcl9zeXN0ZW1fdGlt",
+            "ZRgDIAEoARIYChBzZXJ2ZXJfdXNlcl90aW1lGAQgASgBEhoKEmNsaWVudF9z",
+            "eXN0ZW1fdGltZRgFIAEoARIYChBjbGllbnRfdXNlcl90aW1lGAYgASgBEhIK",
+            "CmxhdGVuY3lfNTAYByABKAESEgoKbGF0ZW5jeV85MBgIIAEoARISCgpsYXRl",
+            "bmN5Xzk1GAkgASgBEhIKCmxhdGVuY3lfOTkYCiABKAESEwoLbGF0ZW5jeV85",
+            "OTkYCyABKAESGAoQc2VydmVyX2NwdV91c2FnZRgMIAEoARImCh5zdWNjZXNz",
+            "ZnVsX3JlcXVlc3RzX3Blcl9zZWNvbmQYDSABKAESIgoaZmFpbGVkX3JlcXVl",
+            "c3RzX3Blcl9zZWNvbmQYDiABKAEigwMKDlNjZW5hcmlvUmVzdWx0EigKCHNj",
+            "ZW5hcmlvGAEgASgLMhYuZ3JwYy50ZXN0aW5nLlNjZW5hcmlvEi4KCWxhdGVu",
+            "Y2llcxgCIAEoCzIbLmdycGMudGVzdGluZy5IaXN0b2dyYW1EYXRhEi8KDGNs",
+            "aWVudF9zdGF0cxgDIAMoCzIZLmdycGMudGVzdGluZy5DbGllbnRTdGF0cxIv",
+            "CgxzZXJ2ZXJfc3RhdHMYBCADKAsyGS5ncnBjLnRlc3RpbmcuU2VydmVyU3Rh",
+            "dHMSFAoMc2VydmVyX2NvcmVzGAUgAygFEjQKB3N1bW1hcnkYBiABKAsyIy5n",
+            "cnBjLnRlc3RpbmcuU2NlbmFyaW9SZXN1bHRTdW1tYXJ5EhYKDmNsaWVudF9z",
+            "dWNjZXNzGAcgAygIEhYKDnNlcnZlcl9zdWNjZXNzGAggAygIEjkKD3JlcXVl",
+            "c3RfcmVzdWx0cxgJIAMoCzIgLmdycGMudGVzdGluZy5SZXF1ZXN0UmVzdWx0",
+            "Q291bnQqQQoKQ2xpZW50VHlwZRIPCgtTWU5DX0NMSUVOVBAAEhAKDEFTWU5D",
+            "X0NMSUVOVBABEhAKDE9USEVSX0NMSUVOVBACKlsKClNlcnZlclR5cGUSDwoL",
+            "U1lOQ19TRVJWRVIQABIQCgxBU1lOQ19TRVJWRVIQARIYChRBU1lOQ19HRU5F",
+            "UklDX1NFUlZFUhACEhAKDE9USEVSX1NFUlZFUhADKiMKB1JwY1R5cGUSCQoF",
+            "VU5BUlkQABINCglTVFJFQU1JTkcQAWIGcHJvdG8z"));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { global::Grpc.Testing.PayloadsReflection.Descriptor, global::Grpc.Testing.StatsReflection.Descriptor, },
           new pbr::GeneratedClrTypeInfo(new[] {typeof(global::Grpc.Testing.ClientType), typeof(global::Grpc.Testing.ServerType), typeof(global::Grpc.Testing.RpcType), }, new pbr::GeneratedClrTypeInfo[] {
@@ -94,7 +98,7 @@ namespace Grpc.Testing {
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStatus), global::Grpc.Testing.ClientStatus.Parser, new[]{ "Stats" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Mark), global::Grpc.Testing.Mark.Parser, new[]{ "Reset" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientArgs), global::Grpc.Testing.ClientArgs.Parser, new[]{ "Setup", "Mark" }, new[]{ "Argtype" }, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerConfig), global::Grpc.Testing.ServerConfig.Parser, new[]{ "ServerType", "SecurityParams", "Port", "AsyncServerThreads", "CoreLimit", "PayloadConfig", "CoreList", "OtherServerApi" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerConfig), global::Grpc.Testing.ServerConfig.Parser, new[]{ "ServerType", "SecurityParams", "Port", "AsyncServerThreads", "CoreLimit", "PayloadConfig", "CoreList", "OtherServerApi", "ResourceQuotaSize" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerArgs), global::Grpc.Testing.ServerArgs.Parser, new[]{ "Setup", "Mark" }, new[]{ "Argtype" }, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerStatus), global::Grpc.Testing.ServerStatus.Parser, new[]{ "Stats", "Port", "Cores" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.CoreRequest), global::Grpc.Testing.CoreRequest.Parser, null, null, null, null),
@@ -102,8 +106,8 @@ namespace Grpc.Testing {
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Void), global::Grpc.Testing.Void.Parser, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Scenario), global::Grpc.Testing.Scenario.Parser, new[]{ "Name", "ClientConfig", "NumClients", "ServerConfig", "NumServers", "WarmupSeconds", "BenchmarkSeconds", "SpawnLocalWorkerCount" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Scenarios), global::Grpc.Testing.Scenarios.Parser, new[]{ "Scenarios_" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ScenarioResultSummary), global::Grpc.Testing.ScenarioResultSummary.Parser, new[]{ "Qps", "QpsPerServerCore", "ServerSystemTime", "ServerUserTime", "ClientSystemTime", "ClientUserTime", "Latency50", "Latency90", "Latency95", "Latency99", "Latency999" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ScenarioResult), global::Grpc.Testing.ScenarioResult.Parser, new[]{ "Scenario", "Latencies", "ClientStats", "ServerStats", "ServerCores", "Summary", "ClientSuccess", "ServerSuccess" }, null, null, null)
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ScenarioResultSummary), global::Grpc.Testing.ScenarioResultSummary.Parser, new[]{ "Qps", "QpsPerServerCore", "ServerSystemTime", "ServerUserTime", "ClientSystemTime", "ClientUserTime", "Latency50", "Latency90", "Latency95", "Latency99", "Latency999", "ServerCpuUsage", "SuccessfulRequestsPerSecond", "FailedRequestsPerSecond" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ScenarioResult), global::Grpc.Testing.ScenarioResult.Parser, new[]{ "Scenario", "Latencies", "ClientStats", "ServerStats", "ServerCores", "Summary", "ClientSuccess", "ServerSuccess", "RequestResults" }, null, null, null)
           }));
     }
     #endregion
@@ -1641,6 +1645,7 @@ namespace Grpc.Testing {
       PayloadConfig = other.payloadConfig_ != null ? other.PayloadConfig.Clone() : null;
       coreList_ = other.coreList_.Clone();
       otherServerApi_ = other.otherServerApi_;
+      resourceQuotaSize_ = other.resourceQuotaSize_;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1753,6 +1758,20 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "resource_quota_size" field.</summary>
+    public const int ResourceQuotaSizeFieldNumber = 1001;
+    private int resourceQuotaSize_;
+    /// <summary>
+    ///  Buffer pool size (no buffer pool specified if unset)
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int ResourceQuotaSize {
+      get { return resourceQuotaSize_; }
+      set {
+        resourceQuotaSize_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ServerConfig);
@@ -1774,6 +1793,7 @@ namespace Grpc.Testing {
       if (!object.Equals(PayloadConfig, other.PayloadConfig)) return false;
       if(!coreList_.Equals(other.coreList_)) return false;
       if (OtherServerApi != other.OtherServerApi) return false;
+      if (ResourceQuotaSize != other.ResourceQuotaSize) return false;
       return true;
     }
 
@@ -1788,6 +1808,7 @@ namespace Grpc.Testing {
       if (payloadConfig_ != null) hash ^= PayloadConfig.GetHashCode();
       hash ^= coreList_.GetHashCode();
       if (OtherServerApi.Length != 0) hash ^= OtherServerApi.GetHashCode();
+      if (ResourceQuotaSize != 0) hash ^= ResourceQuotaSize.GetHashCode();
       return hash;
     }
 
@@ -1827,6 +1848,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(90);
         output.WriteString(OtherServerApi);
       }
+      if (ResourceQuotaSize != 0) {
+        output.WriteRawTag(200, 62);
+        output.WriteInt32(ResourceQuotaSize);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1854,6 +1879,9 @@ namespace Grpc.Testing {
       if (OtherServerApi.Length != 0) {
         size += 1 + pb::CodedOutputStream.ComputeStringSize(OtherServerApi);
       }
+      if (ResourceQuotaSize != 0) {
+        size += 2 + pb::CodedOutputStream.ComputeInt32Size(ResourceQuotaSize);
+      }
       return size;
     }
 
@@ -1890,6 +1918,9 @@ namespace Grpc.Testing {
       if (other.OtherServerApi.Length != 0) {
         OtherServerApi = other.OtherServerApi;
       }
+      if (other.ResourceQuotaSize != 0) {
+        ResourceQuotaSize = other.ResourceQuotaSize;
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1939,6 +1970,10 @@ namespace Grpc.Testing {
             OtherServerApi = input.ReadString();
             break;
           }
+          case 8008: {
+            ResourceQuotaSize = input.ReadInt32();
+            break;
+          }
         }
       }
     }
@@ -3117,6 +3152,9 @@ namespace Grpc.Testing {
       latency95_ = other.latency95_;
       latency99_ = other.latency99_;
       latency999_ = other.latency999_;
+      serverCpuUsage_ = other.serverCpuUsage_;
+      successfulRequestsPerSecond_ = other.successfulRequestsPerSecond_;
+      failedRequestsPerSecond_ = other.failedRequestsPerSecond_;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3266,6 +3304,45 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "server_cpu_usage" field.</summary>
+    public const int ServerCpuUsageFieldNumber = 12;
+    private double serverCpuUsage_;
+    /// <summary>
+    ///  server cpu usage percentage
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public double ServerCpuUsage {
+      get { return serverCpuUsage_; }
+      set {
+        serverCpuUsage_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "successful_requests_per_second" field.</summary>
+    public const int SuccessfulRequestsPerSecondFieldNumber = 13;
+    private double successfulRequestsPerSecond_;
+    /// <summary>
+    ///  Number of requests that succeeded/failed
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public double SuccessfulRequestsPerSecond {
+      get { return successfulRequestsPerSecond_; }
+      set {
+        successfulRequestsPerSecond_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "failed_requests_per_second" field.</summary>
+    public const int FailedRequestsPerSecondFieldNumber = 14;
+    private double failedRequestsPerSecond_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public double FailedRequestsPerSecond {
+      get { return failedRequestsPerSecond_; }
+      set {
+        failedRequestsPerSecond_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ScenarioResultSummary);
@@ -3290,6 +3367,9 @@ namespace Grpc.Testing {
       if (Latency95 != other.Latency95) return false;
       if (Latency99 != other.Latency99) return false;
       if (Latency999 != other.Latency999) return false;
+      if (ServerCpuUsage != other.ServerCpuUsage) return false;
+      if (SuccessfulRequestsPerSecond != other.SuccessfulRequestsPerSecond) return false;
+      if (FailedRequestsPerSecond != other.FailedRequestsPerSecond) return false;
       return true;
     }
 
@@ -3307,6 +3387,9 @@ namespace Grpc.Testing {
       if (Latency95 != 0D) hash ^= Latency95.GetHashCode();
       if (Latency99 != 0D) hash ^= Latency99.GetHashCode();
       if (Latency999 != 0D) hash ^= Latency999.GetHashCode();
+      if (ServerCpuUsage != 0D) hash ^= ServerCpuUsage.GetHashCode();
+      if (SuccessfulRequestsPerSecond != 0D) hash ^= SuccessfulRequestsPerSecond.GetHashCode();
+      if (FailedRequestsPerSecond != 0D) hash ^= FailedRequestsPerSecond.GetHashCode();
       return hash;
     }
 
@@ -3361,6 +3444,18 @@ namespace Grpc.Testing {
         output.WriteRawTag(89);
         output.WriteDouble(Latency999);
       }
+      if (ServerCpuUsage != 0D) {
+        output.WriteRawTag(97);
+        output.WriteDouble(ServerCpuUsage);
+      }
+      if (SuccessfulRequestsPerSecond != 0D) {
+        output.WriteRawTag(105);
+        output.WriteDouble(SuccessfulRequestsPerSecond);
+      }
+      if (FailedRequestsPerSecond != 0D) {
+        output.WriteRawTag(113);
+        output.WriteDouble(FailedRequestsPerSecond);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3399,6 +3494,15 @@ namespace Grpc.Testing {
       if (Latency999 != 0D) {
         size += 1 + 8;
       }
+      if (ServerCpuUsage != 0D) {
+        size += 1 + 8;
+      }
+      if (SuccessfulRequestsPerSecond != 0D) {
+        size += 1 + 8;
+      }
+      if (FailedRequestsPerSecond != 0D) {
+        size += 1 + 8;
+      }
       return size;
     }
 
@@ -3440,6 +3544,15 @@ namespace Grpc.Testing {
       if (other.Latency999 != 0D) {
         Latency999 = other.Latency999;
       }
+      if (other.ServerCpuUsage != 0D) {
+        ServerCpuUsage = other.ServerCpuUsage;
+      }
+      if (other.SuccessfulRequestsPerSecond != 0D) {
+        SuccessfulRequestsPerSecond = other.SuccessfulRequestsPerSecond;
+      }
+      if (other.FailedRequestsPerSecond != 0D) {
+        FailedRequestsPerSecond = other.FailedRequestsPerSecond;
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3494,6 +3607,18 @@ namespace Grpc.Testing {
             Latency999 = input.ReadDouble();
             break;
           }
+          case 97: {
+            ServerCpuUsage = input.ReadDouble();
+            break;
+          }
+          case 105: {
+            SuccessfulRequestsPerSecond = input.ReadDouble();
+            break;
+          }
+          case 113: {
+            FailedRequestsPerSecond = input.ReadDouble();
+            break;
+          }
         }
       }
     }
@@ -3535,6 +3660,7 @@ namespace Grpc.Testing {
       Summary = other.summary_ != null ? other.Summary.Clone() : null;
       clientSuccess_ = other.clientSuccess_.Clone();
       serverSuccess_ = other.serverSuccess_.Clone();
+      requestResults_ = other.requestResults_.Clone();
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3646,6 +3772,19 @@ namespace Grpc.Testing {
       get { return serverSuccess_; }
     }
 
+    /// <summary>Field number for the "request_results" field.</summary>
+    public const int RequestResultsFieldNumber = 9;
+    private static readonly pb::FieldCodec<global::Grpc.Testing.RequestResultCount> _repeated_requestResults_codec
+        = pb::FieldCodec.ForMessage(74, global::Grpc.Testing.RequestResultCount.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> requestResults_ = new pbc::RepeatedField<global::Grpc.Testing.RequestResultCount>();
+    /// <summary>
+    ///  Number of failed requests (one row per status code seen)
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> RequestResults {
+      get { return requestResults_; }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ScenarioResult);
@@ -3667,6 +3806,7 @@ namespace Grpc.Testing {
       if (!object.Equals(Summary, other.Summary)) return false;
       if(!clientSuccess_.Equals(other.clientSuccess_)) return false;
       if(!serverSuccess_.Equals(other.serverSuccess_)) return false;
+      if(!requestResults_.Equals(other.requestResults_)) return false;
       return true;
     }
 
@@ -3681,6 +3821,7 @@ namespace Grpc.Testing {
       if (summary_ != null) hash ^= Summary.GetHashCode();
       hash ^= clientSuccess_.GetHashCode();
       hash ^= serverSuccess_.GetHashCode();
+      hash ^= requestResults_.GetHashCode();
       return hash;
     }
 
@@ -3708,6 +3849,7 @@ namespace Grpc.Testing {
       }
       clientSuccess_.WriteTo(output, _repeated_clientSuccess_codec);
       serverSuccess_.WriteTo(output, _repeated_serverSuccess_codec);
+      requestResults_.WriteTo(output, _repeated_requestResults_codec);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3727,6 +3869,7 @@ namespace Grpc.Testing {
       }
       size += clientSuccess_.CalculateSize(_repeated_clientSuccess_codec);
       size += serverSuccess_.CalculateSize(_repeated_serverSuccess_codec);
+      size += requestResults_.CalculateSize(_repeated_requestResults_codec);
       return size;
     }
 
@@ -3758,6 +3901,7 @@ namespace Grpc.Testing {
       }
       clientSuccess_.Add(other.clientSuccess_);
       serverSuccess_.Add(other.serverSuccess_);
+      requestResults_.Add(other.requestResults_);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3812,6 +3956,10 @@ namespace Grpc.Testing {
             serverSuccess_.AddEntriesFrom(input, _repeated_serverSuccess_codec);
             break;
           }
+          case 74: {
+            requestResults_.AddEntriesFrom(input, _repeated_requestResults_codec);
+            break;
+          }
         }
       }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index afd85fb484..f7abcf8046 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -28,15 +28,6 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseSigned|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\ReleaseSigned</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <SignAssembly>True</SignAssembly>
-    <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
-  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Net" />
@@ -51,9 +42,6 @@
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
-    <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
@@ -90,6 +78,9 @@
     <Reference Include="Moq">
       <HintPath>..\packages\Moq.4.6.38-alpha\lib\net45\Moq.dll</HintPath>
     </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
index eb3bb8a28b..d55e658d94 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
@@ -103,6 +103,34 @@ namespace Grpc.IntegrationTesting
             client.UnaryCall(new SimpleRequest { }, new CallOptions(credentials: callCredentials));
         }
 
+        [Test]
+        public void MetadataCredentials_InterceptorLeavesMetadataEmpty()
+        {
+            var channelCredentials = ChannelCredentials.Create(TestCredentials.CreateSslCredentials(),
+                CallCredentials.FromInterceptor(new AsyncAuthInterceptor((context, metadata) => TaskUtils.CompletedTask)));
+            channel = new Channel(Host, server.Ports.Single().BoundPort, channelCredentials, options);
+            client = new TestService.TestServiceClient(channel);
+
+            var ex = Assert.Throws<RpcException>(() => client.UnaryCall(new SimpleRequest { }));
+            // StatusCode.Unknown as the server-side handler throws an exception after not receiving the authorization header.
+            Assert.AreEqual(StatusCode.Unknown, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public void MetadataCredentials_InterceptorThrows()
+        {
+            var callCredentials = CallCredentials.FromInterceptor(new AsyncAuthInterceptor((context, metadata) =>
+            {
+                throw new Exception("Auth interceptor throws");
+            }));
+            var channelCredentials = ChannelCredentials.Create(TestCredentials.CreateSslCredentials(), callCredentials);
+            channel = new Channel(Host, server.Ports.Single().BoundPort, channelCredentials, options);
+            client = new TestService.TestServiceClient(channel);
+
+            var ex = Assert.Throws<RpcException>(() => client.UnaryCall(new SimpleRequest { }));
+            Assert.AreEqual(StatusCode.Unauthenticated, ex.Status.StatusCode);
+        }
+
         private class FakeTestService : TestService.TestServiceBase
         {
             public override Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
diff --git a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
index bcd7e3c040..8b58622d53 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
@@ -44,7 +44,7 @@ using System.Threading.Tasks;
 using Grpc.Core;
 
 namespace Grpc.Testing {
-  public static class MetricsService
+  public static partial class MetricsService
   {
     static readonly string __ServiceName = "grpc.testing.MetricsService";
 
@@ -73,20 +73,27 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of MetricsService</summary>
-    public abstract class MetricsServiceBase
+    public abstract partial class MetricsServiceBase
     {
       /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
+      /// Returns the values of all the gauges that are currently being maintained by
+      /// the service
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task GetAllGauges(global::Grpc.Testing.EmptyMessage request, IServerStreamWriter<global::Grpc.Testing.GaugeResponse> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Returns the value of one gauge
+      /// Returns the value of one gauge
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.GaugeResponse> GetGauge(global::Grpc.Testing.GaugeRequest request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -95,7 +102,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for MetricsService</summary>
-    public class MetricsServiceClient : ClientBase<MetricsServiceClient>
+    public partial class MetricsServiceClient : ClientBase<MetricsServiceClient>
     {
       /// <summary>Creates a new client for MetricsService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -118,45 +125,69 @@ namespace Grpc.Testing {
       }
 
       /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
+      /// Returns the values of all the gauges that are currently being maintained by
+      /// the service
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return GetAllGauges(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
+      /// Returns the values of all the gauges that are currently being maintained by
+      /// the service
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_GetAllGauges, null, options, request);
       }
       /// <summary>
-      ///  Returns the value of one gauge
+      /// Returns the value of one gauge
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return GetGauge(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Returns the value of one gauge
+      /// Returns the value of one gauge
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_GetGauge, null, options, request);
       }
       /// <summary>
-      ///  Returns the value of one gauge
+      /// Returns the value of one gauge
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return GetGaugeAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Returns the value of one gauge
+      /// Returns the value of one gauge
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_GetGauge, null, options, request);
@@ -169,6 +200,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(MetricsServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index 848dd04fa7..5135d9ab66 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -40,7 +40,7 @@ using System.Threading.Tasks;
 using Grpc.Core;
 
 namespace Grpc.Testing {
-  public static class BenchmarkService
+  public static partial class BenchmarkService
   {
     static readonly string __ServiceName = "grpc.testing.BenchmarkService";
 
@@ -68,21 +68,28 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of BenchmarkService</summary>
-    public abstract class BenchmarkServiceBase
+    public abstract partial class BenchmarkServiceBase
     {
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task StreamingCall(IAsyncStreamReader<global::Grpc.Testing.SimpleRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.SimpleResponse> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -91,7 +98,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for BenchmarkService</summary>
-    public class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>
+    public partial class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>
     {
       /// <summary>Creates a new client for BenchmarkService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -114,49 +121,71 @@ namespace Grpc.Testing {
       }
 
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return StreamingCall(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
+      /// One request followed by one response.
+      /// The server returns the client payload as-is.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_StreamingCall, null, options);
@@ -169,6 +198,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(BenchmarkServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
@@ -177,7 +207,7 @@ namespace Grpc.Testing {
     }
 
   }
-  public static class WorkerService
+  public static partial class WorkerService
   {
     static readonly string __ServiceName = "grpc.testing.WorkerService";
 
@@ -224,45 +254,59 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of WorkerService</summary>
-    public abstract class WorkerServiceBase
+    public abstract partial class WorkerServiceBase
     {
       /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start server with specified workload.
+      /// First request sent specifies the ServerConfig followed by ServerStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test server
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task RunServer(IAsyncStreamReader<global::Grpc.Testing.ServerArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ServerStatus> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start client with specified workload.
+      /// First request sent specifies the ClientConfig followed by ClientStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test client
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task RunClient(IAsyncStreamReader<global::Grpc.Testing.ClientArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ClientStatus> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Just return the core count - unary call
+      /// Just return the core count - unary call
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.CoreResponse> CoreCount(global::Grpc.Testing.CoreRequest request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  Quit this worker
+      /// Quit this worker
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Void> QuitWorker(global::Grpc.Testing.Void request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -271,7 +315,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for WorkerService</summary>
-    public class WorkerServiceClient : ClientBase<WorkerServiceClient>
+    public partial class WorkerServiceClient : ClientBase<WorkerServiceClient>
     {
       /// <summary>Creates a new client for WorkerService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -294,105 +338,149 @@ namespace Grpc.Testing {
       }
 
       /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start server with specified workload.
+      /// First request sent specifies the ServerConfig followed by ServerStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test server
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return RunServer(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start server with specified workload.
+      /// First request sent specifies the ServerConfig followed by ServerStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test server
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_RunServer, null, options);
       }
       /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start client with specified workload.
+      /// First request sent specifies the ClientConfig followed by ClientStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test client
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return RunClient(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
+      /// Start client with specified workload.
+      /// First request sent specifies the ClientConfig followed by ClientStatus
+      /// response. After that, a "Mark" can be sent anytime to request the latest
+      /// stats. Closing the stream will initiate shutdown of the test client
+      /// and once the shutdown has finished, the OK status is sent to terminate
+      /// this RPC.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_RunClient, null, options);
       }
       /// <summary>
-      ///  Just return the core count - unary call
+      /// Just return the core count - unary call
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return CoreCount(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Just return the core count - unary call
+      /// Just return the core count - unary call
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_CoreCount, null, options, request);
       }
       /// <summary>
-      ///  Just return the core count - unary call
+      /// Just return the core count - unary call
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return CoreCountAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Just return the core count - unary call
+      /// Just return the core count - unary call
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_CoreCount, null, options, request);
       }
       /// <summary>
-      ///  Quit this worker
+      /// Quit this worker
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return QuitWorker(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Quit this worker
+      /// Quit this worker
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_QuitWorker, null, options, request);
       }
       /// <summary>
-      ///  Quit this worker
+      /// Quit this worker
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return QuitWorkerAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Quit this worker
+      /// Quit this worker
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_QuitWorker, null, options, request);
@@ -405,6 +493,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(WorkerServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
diff --git a/src/csharp/Grpc.IntegrationTesting/Stats.cs b/src/csharp/Grpc.IntegrationTesting/Stats.cs
index 0ae77cfb92..504aa11d8a 100644
--- a/src/csharp/Grpc.IntegrationTesting/Stats.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Stats.cs
@@ -23,22 +23,27 @@ namespace Grpc.Testing {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
             "CiJzcmMvcHJvdG8vZ3JwYy90ZXN0aW5nL3N0YXRzLnByb3RvEgxncnBjLnRl",
-            "c3RpbmciSwoLU2VydmVyU3RhdHMSFAoMdGltZV9lbGFwc2VkGAEgASgBEhEK",
-            "CXRpbWVfdXNlchgCIAEoARITCgt0aW1lX3N5c3RlbRgDIAEoASI7Cg9IaXN0",
-            "b2dyYW1QYXJhbXMSEgoKcmVzb2x1dGlvbhgBIAEoARIUCgxtYXhfcG9zc2li",
-            "bGUYAiABKAEidwoNSGlzdG9ncmFtRGF0YRIOCgZidWNrZXQYASADKA0SEAoI",
-            "bWluX3NlZW4YAiABKAESEAoIbWF4X3NlZW4YAyABKAESCwoDc3VtGAQgASgB",
-            "EhYKDnN1bV9vZl9zcXVhcmVzGAUgASgBEg0KBWNvdW50GAYgASgBInsKC0Ns",
-            "aWVudFN0YXRzEi4KCWxhdGVuY2llcxgBIAEoCzIbLmdycGMudGVzdGluZy5I",
-            "aXN0b2dyYW1EYXRhEhQKDHRpbWVfZWxhcHNlZBgCIAEoARIRCgl0aW1lX3Vz",
-            "ZXIYAyABKAESEwoLdGltZV9zeXN0ZW0YBCABKAFiBnByb3RvMw=="));
+            "c3RpbmciegoLU2VydmVyU3RhdHMSFAoMdGltZV9lbGFwc2VkGAEgASgBEhEK",
+            "CXRpbWVfdXNlchgCIAEoARITCgt0aW1lX3N5c3RlbRgDIAEoARIWCg50b3Rh",
+            "bF9jcHVfdGltZRgEIAEoBBIVCg1pZGxlX2NwdV90aW1lGAUgASgEIjsKD0hp",
+            "c3RvZ3JhbVBhcmFtcxISCgpyZXNvbHV0aW9uGAEgASgBEhQKDG1heF9wb3Nz",
+            "aWJsZRgCIAEoASJ3Cg1IaXN0b2dyYW1EYXRhEg4KBmJ1Y2tldBgBIAMoDRIQ",
+            "CghtaW5fc2VlbhgCIAEoARIQCghtYXhfc2VlbhgDIAEoARILCgNzdW0YBCAB",
+            "KAESFgoOc3VtX29mX3NxdWFyZXMYBSABKAESDQoFY291bnQYBiABKAEiOAoS",
+            "UmVxdWVzdFJlc3VsdENvdW50EhMKC3N0YXR1c19jb2RlGAEgASgFEg0KBWNv",
+            "dW50GAIgASgDIrYBCgtDbGllbnRTdGF0cxIuCglsYXRlbmNpZXMYASABKAsy",
+            "Gy5ncnBjLnRlc3RpbmcuSGlzdG9ncmFtRGF0YRIUCgx0aW1lX2VsYXBzZWQY",
+            "AiABKAESEQoJdGltZV91c2VyGAMgASgBEhMKC3RpbWVfc3lzdGVtGAQgASgB",
+            "EjkKD3JlcXVlc3RfcmVzdWx0cxgFIAMoCzIgLmdycGMudGVzdGluZy5SZXF1",
+            "ZXN0UmVzdWx0Q291bnRiBnByb3RvMw=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
           new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerStats), global::Grpc.Testing.ServerStats.Parser, new[]{ "TimeElapsed", "TimeUser", "TimeSystem" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerStats), global::Grpc.Testing.ServerStats.Parser, new[]{ "TimeElapsed", "TimeUser", "TimeSystem", "TotalCpuTime", "IdleCpuTime" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.HistogramParams), global::Grpc.Testing.HistogramParams.Parser, new[]{ "Resolution", "MaxPossible" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.HistogramData), global::Grpc.Testing.HistogramData.Parser, new[]{ "Bucket", "MinSeen", "MaxSeen", "Sum", "SumOfSquares", "Count" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStats), global::Grpc.Testing.ClientStats.Parser, new[]{ "Latencies", "TimeElapsed", "TimeUser", "TimeSystem" }, null, null, null)
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.RequestResultCount), global::Grpc.Testing.RequestResultCount.Parser, new[]{ "StatusCode", "Count" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStats), global::Grpc.Testing.ClientStats.Parser, new[]{ "Latencies", "TimeElapsed", "TimeUser", "TimeSystem", "RequestResults" }, null, null, null)
           }));
     }
     #endregion
@@ -72,6 +77,8 @@ namespace Grpc.Testing {
       timeElapsed_ = other.timeElapsed_;
       timeUser_ = other.timeUser_;
       timeSystem_ = other.timeSystem_;
+      totalCpuTime_ = other.totalCpuTime_;
+      idleCpuTime_ = other.idleCpuTime_;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -122,6 +129,34 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "total_cpu_time" field.</summary>
+    public const int TotalCpuTimeFieldNumber = 4;
+    private ulong totalCpuTime_;
+    /// <summary>
+    ///  change in total cpu time of the server (data from proc/stat)
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ulong TotalCpuTime {
+      get { return totalCpuTime_; }
+      set {
+        totalCpuTime_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "idle_cpu_time" field.</summary>
+    public const int IdleCpuTimeFieldNumber = 5;
+    private ulong idleCpuTime_;
+    /// <summary>
+    ///  change in idle time of the server (data from proc/stat)
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ulong IdleCpuTime {
+      get { return idleCpuTime_; }
+      set {
+        idleCpuTime_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ServerStats);
@@ -138,6 +173,8 @@ namespace Grpc.Testing {
       if (TimeElapsed != other.TimeElapsed) return false;
       if (TimeUser != other.TimeUser) return false;
       if (TimeSystem != other.TimeSystem) return false;
+      if (TotalCpuTime != other.TotalCpuTime) return false;
+      if (IdleCpuTime != other.IdleCpuTime) return false;
       return true;
     }
 
@@ -147,6 +184,8 @@ namespace Grpc.Testing {
       if (TimeElapsed != 0D) hash ^= TimeElapsed.GetHashCode();
       if (TimeUser != 0D) hash ^= TimeUser.GetHashCode();
       if (TimeSystem != 0D) hash ^= TimeSystem.GetHashCode();
+      if (TotalCpuTime != 0UL) hash ^= TotalCpuTime.GetHashCode();
+      if (IdleCpuTime != 0UL) hash ^= IdleCpuTime.GetHashCode();
       return hash;
     }
 
@@ -169,6 +208,14 @@ namespace Grpc.Testing {
         output.WriteRawTag(25);
         output.WriteDouble(TimeSystem);
       }
+      if (TotalCpuTime != 0UL) {
+        output.WriteRawTag(32);
+        output.WriteUInt64(TotalCpuTime);
+      }
+      if (IdleCpuTime != 0UL) {
+        output.WriteRawTag(40);
+        output.WriteUInt64(IdleCpuTime);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -183,6 +230,12 @@ namespace Grpc.Testing {
       if (TimeSystem != 0D) {
         size += 1 + 8;
       }
+      if (TotalCpuTime != 0UL) {
+        size += 1 + pb::CodedOutputStream.ComputeUInt64Size(TotalCpuTime);
+      }
+      if (IdleCpuTime != 0UL) {
+        size += 1 + pb::CodedOutputStream.ComputeUInt64Size(IdleCpuTime);
+      }
       return size;
     }
 
@@ -200,6 +253,12 @@ namespace Grpc.Testing {
       if (other.TimeSystem != 0D) {
         TimeSystem = other.TimeSystem;
       }
+      if (other.TotalCpuTime != 0UL) {
+        TotalCpuTime = other.TotalCpuTime;
+      }
+      if (other.IdleCpuTime != 0UL) {
+        IdleCpuTime = other.IdleCpuTime;
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -222,6 +281,14 @@ namespace Grpc.Testing {
             TimeSystem = input.ReadDouble();
             break;
           }
+          case 32: {
+            TotalCpuTime = input.ReadUInt64();
+            break;
+          }
+          case 40: {
+            IdleCpuTime = input.ReadUInt64();
+            break;
+          }
         }
       }
     }
@@ -635,6 +702,151 @@ namespace Grpc.Testing {
 
   }
 
+  public sealed partial class RequestResultCount : pb::IMessage<RequestResultCount> {
+    private static readonly pb::MessageParser<RequestResultCount> _parser = new pb::MessageParser<RequestResultCount>(() => new RequestResultCount());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<RequestResultCount> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.StatsReflection.Descriptor.MessageTypes[3]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public RequestResultCount() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public RequestResultCount(RequestResultCount other) : this() {
+      statusCode_ = other.statusCode_;
+      count_ = other.count_;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public RequestResultCount Clone() {
+      return new RequestResultCount(this);
+    }
+
+    /// <summary>Field number for the "status_code" field.</summary>
+    public const int StatusCodeFieldNumber = 1;
+    private int statusCode_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int StatusCode {
+      get { return statusCode_; }
+      set {
+        statusCode_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "count" field.</summary>
+    public const int CountFieldNumber = 2;
+    private long count_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public long Count {
+      get { return count_; }
+      set {
+        count_ = value;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as RequestResultCount);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(RequestResultCount other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (StatusCode != other.StatusCode) return false;
+      if (Count != other.Count) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (StatusCode != 0) hash ^= StatusCode.GetHashCode();
+      if (Count != 0L) hash ^= Count.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (StatusCode != 0) {
+        output.WriteRawTag(8);
+        output.WriteInt32(StatusCode);
+      }
+      if (Count != 0L) {
+        output.WriteRawTag(16);
+        output.WriteInt64(Count);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (StatusCode != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(StatusCode);
+      }
+      if (Count != 0L) {
+        size += 1 + pb::CodedOutputStream.ComputeInt64Size(Count);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(RequestResultCount other) {
+      if (other == null) {
+        return;
+      }
+      if (other.StatusCode != 0) {
+        StatusCode = other.StatusCode;
+      }
+      if (other.Count != 0L) {
+        Count = other.Count;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            StatusCode = input.ReadInt32();
+            break;
+          }
+          case 16: {
+            Count = input.ReadInt64();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
   public sealed partial class ClientStats : pb::IMessage<ClientStats> {
     private static readonly pb::MessageParser<ClientStats> _parser = new pb::MessageParser<ClientStats>(() => new ClientStats());
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -642,7 +854,7 @@ namespace Grpc.Testing {
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.StatsReflection.Descriptor.MessageTypes[3]; }
+      get { return global::Grpc.Testing.StatsReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -663,6 +875,7 @@ namespace Grpc.Testing {
       timeElapsed_ = other.timeElapsed_;
       timeUser_ = other.timeUser_;
       timeSystem_ = other.timeSystem_;
+      requestResults_ = other.requestResults_.Clone();
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -720,6 +933,19 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "request_results" field.</summary>
+    public const int RequestResultsFieldNumber = 5;
+    private static readonly pb::FieldCodec<global::Grpc.Testing.RequestResultCount> _repeated_requestResults_codec
+        = pb::FieldCodec.ForMessage(42, global::Grpc.Testing.RequestResultCount.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> requestResults_ = new pbc::RepeatedField<global::Grpc.Testing.RequestResultCount>();
+    /// <summary>
+    ///  Number of failed requests (one row per status code seen)
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> RequestResults {
+      get { return requestResults_; }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ClientStats);
@@ -737,6 +963,7 @@ namespace Grpc.Testing {
       if (TimeElapsed != other.TimeElapsed) return false;
       if (TimeUser != other.TimeUser) return false;
       if (TimeSystem != other.TimeSystem) return false;
+      if(!requestResults_.Equals(other.requestResults_)) return false;
       return true;
     }
 
@@ -747,6 +974,7 @@ namespace Grpc.Testing {
       if (TimeElapsed != 0D) hash ^= TimeElapsed.GetHashCode();
       if (TimeUser != 0D) hash ^= TimeUser.GetHashCode();
       if (TimeSystem != 0D) hash ^= TimeSystem.GetHashCode();
+      hash ^= requestResults_.GetHashCode();
       return hash;
     }
 
@@ -773,6 +1001,7 @@ namespace Grpc.Testing {
         output.WriteRawTag(33);
         output.WriteDouble(TimeSystem);
       }
+      requestResults_.WriteTo(output, _repeated_requestResults_codec);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -790,6 +1019,7 @@ namespace Grpc.Testing {
       if (TimeSystem != 0D) {
         size += 1 + 8;
       }
+      size += requestResults_.CalculateSize(_repeated_requestResults_codec);
       return size;
     }
 
@@ -813,6 +1043,7 @@ namespace Grpc.Testing {
       if (other.TimeSystem != 0D) {
         TimeSystem = other.TimeSystem;
       }
+      requestResults_.Add(other.requestResults_);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -842,6 +1073,10 @@ namespace Grpc.Testing {
             TimeSystem = input.ReadDouble();
             break;
           }
+          case 42: {
+            requestResults_.AddEntriesFrom(input, _repeated_requestResults_codec);
+            break;
+          }
         }
       }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index 8d649bf5c5..0265f8e821 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -42,10 +42,10 @@ using Grpc.Core;
 
 namespace Grpc.Testing {
   /// <summary>
-  ///  A simple service to test the various types of RPCs and experiment with
-  ///  performance with various types of payload.
+  /// A simple service to test the various types of RPCs and experiment with
+  /// performance with various types of payload.
   /// </summary>
-  public static class TestService
+  public static partial class TestService
   {
     static readonly string __ServiceName = "grpc.testing.TestService";
 
@@ -120,77 +120,104 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of TestService</summary>
-    public abstract class TestServiceBase
+    public abstract partial class TestServiceBase
     {
       /// <summary>
-      ///  One empty request followed by one empty response.
+      /// One empty request followed by one empty response.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> EmptyCall(global::Grpc.Testing.Empty request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  One request followed by one response.
+      /// One request followed by one response.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  One request followed by one response. Response has cache control
-      ///  headers set such that a caching HTTP proxy (such as GFE) can
-      ///  satisfy subsequent requests.
+      /// One request followed by one response. Response has cache control
+      /// headers set such that a caching HTTP proxy (such as GFE) can
+      /// satisfy subsequent requests.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
+      /// One request followed by a sequence of responses (streamed download).
+      /// The server returns the payload with client desired type and sizes.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
+      /// A sequence of requests followed by one response (streamed upload).
+      /// The server returns the aggregated size of client payload as the result.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<global::Grpc.Testing.StreamingInputCallRequest> requestStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
+      /// A sequence of requests with each request served by the server immediately.
+      /// As one request could lead to multiple responses, this interface
+      /// demonstrates the idea of full duplexing.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task FullDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
+      /// A sequence of requests followed by a sequence of responses.
+      /// The server buffers all the client requests and then serves them in order. A
+      /// stream of responses are returned to the client when the server starts with
+      /// first request.
       /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
       public virtual global::System.Threading.Tasks.Task HalfDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
-      ///  The test server will not implement this method. It will be used
-      ///  to test the behavior when clients call unimplemented methods.
+      /// The test server will not implement this method. It will be used
+      /// to test the behavior when clients call unimplemented methods.
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -199,7 +226,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for TestService</summary>
-    public class TestServiceClient : ClientBase<TestServiceClient>
+    public partial class TestServiceClient : ClientBase<TestServiceClient>
     {
       /// <summary>Creates a new client for TestService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -222,195 +249,285 @@ namespace Grpc.Testing {
       }
 
       /// <summary>
-      ///  One empty request followed by one empty response.
+      /// One empty request followed by one empty response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return EmptyCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One empty request followed by one empty response.
+      /// One empty request followed by one empty response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_EmptyCall, null, options, request);
       }
       /// <summary>
-      ///  One empty request followed by one empty response.
+      /// One empty request followed by one empty response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return EmptyCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One empty request followed by one empty response.
+      /// One empty request followed by one empty response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_EmptyCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response.
+      /// One request followed by one response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response.
+      /// One request followed by one response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response.
+      /// One request followed by one response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response.
+      /// One request followed by one response.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response. Response has cache control
-      ///  headers set such that a caching HTTP proxy (such as GFE) can
-      ///  satisfy subsequent requests.
+      /// One request followed by one response. Response has cache control
+      /// headers set such that a caching HTTP proxy (such as GFE) can
+      /// satisfy subsequent requests.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return CacheableUnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response. Response has cache control
-      ///  headers set such that a caching HTTP proxy (such as GFE) can
-      ///  satisfy subsequent requests.
+      /// One request followed by one response. Response has cache control
+      /// headers set such that a caching HTTP proxy (such as GFE) can
+      /// satisfy subsequent requests.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_CacheableUnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by one response. Response has cache control
-      ///  headers set such that a caching HTTP proxy (such as GFE) can
-      ///  satisfy subsequent requests.
+      /// One request followed by one response. Response has cache control
+      /// headers set such that a caching HTTP proxy (such as GFE) can
+      /// satisfy subsequent requests.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return CacheableUnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by one response. Response has cache control
-      ///  headers set such that a caching HTTP proxy (such as GFE) can
-      ///  satisfy subsequent requests.
+      /// One request followed by one response. Response has cache control
+      /// headers set such that a caching HTTP proxy (such as GFE) can
+      /// satisfy subsequent requests.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_CacheableUnaryCall, null, options, request);
       }
       /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
+      /// One request followed by a sequence of responses (streamed download).
+      /// The server returns the payload with client desired type and sizes.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return StreamingOutputCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
+      /// One request followed by a sequence of responses (streamed download).
+      /// The server returns the payload with client desired type and sizes.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_StreamingOutputCall, null, options, request);
       }
       /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
+      /// A sequence of requests followed by one response (streamed upload).
+      /// The server returns the aggregated size of client payload as the result.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return StreamingInputCall(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
+      /// A sequence of requests followed by one response (streamed upload).
+      /// The server returns the aggregated size of client payload as the result.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(CallOptions options)
       {
         return CallInvoker.AsyncClientStreamingCall(__Method_StreamingInputCall, null, options);
       }
       /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
+      /// A sequence of requests with each request served by the server immediately.
+      /// As one request could lead to multiple responses, this interface
+      /// demonstrates the idea of full duplexing.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return FullDuplexCall(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
+      /// A sequence of requests with each request served by the server immediately.
+      /// As one request could lead to multiple responses, this interface
+      /// demonstrates the idea of full duplexing.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_FullDuplexCall, null, options);
       }
       /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
+      /// A sequence of requests followed by a sequence of responses.
+      /// The server buffers all the client requests and then serves them in order. A
+      /// stream of responses are returned to the client when the server starts with
+      /// first request.
       /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return HalfDuplexCall(new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
+      /// A sequence of requests followed by a sequence of responses.
+      /// The server buffers all the client requests and then serves them in order. A
+      /// stream of responses are returned to the client when the server starts with
+      /// first request.
       /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_HalfDuplexCall, null, options);
       }
       /// <summary>
-      ///  The test server will not implement this method. It will be used
-      ///  to test the behavior when clients call unimplemented methods.
+      /// The test server will not implement this method. It will be used
+      /// to test the behavior when clients call unimplemented methods.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnimplementedCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  The test server will not implement this method. It will be used
-      ///  to test the behavior when clients call unimplemented methods.
+      /// The test server will not implement this method. It will be used
+      /// to test the behavior when clients call unimplemented methods.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
       /// <summary>
-      ///  The test server will not implement this method. It will be used
-      ///  to test the behavior when clients call unimplemented methods.
+      /// The test server will not implement this method. It will be used
+      /// to test the behavior when clients call unimplemented methods.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnimplementedCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  The test server will not implement this method. It will be used
-      ///  to test the behavior when clients call unimplemented methods.
+      /// The test server will not implement this method. It will be used
+      /// to test the behavior when clients call unimplemented methods.
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnimplementedCall, null, options, request);
@@ -423,6 +540,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(TestServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
@@ -438,10 +556,10 @@ namespace Grpc.Testing {
 
   }
   /// <summary>
-  ///  A simple service NOT implemented at servers so clients can test for
-  ///  that case.
+  /// A simple service NOT implemented at servers so clients can test for
+  /// that case.
   /// </summary>
-  public static class UnimplementedService
+  public static partial class UnimplementedService
   {
     static readonly string __ServiceName = "grpc.testing.UnimplementedService";
 
@@ -461,11 +579,14 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of UnimplementedService</summary>
-    public abstract class UnimplementedServiceBase
+    public abstract partial class UnimplementedServiceBase
     {
       /// <summary>
-      ///  A call that no server should implement
+      /// A call that no server should implement
       /// </summary>
+      /// <param name="request">The request received from the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>The response to send back to the client (wrapped by a task).</returns>
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context)
       {
         throw new RpcException(new Status(StatusCode.Unimplemented, ""));
@@ -474,7 +595,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for UnimplementedService</summary>
-    public class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>
+    public partial class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>
     {
       /// <summary>Creates a new client for UnimplementedService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -497,29 +618,45 @@ namespace Grpc.Testing {
       }
 
       /// <summary>
-      ///  A call that no server should implement
+      /// A call that no server should implement
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnimplementedCall(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  A call that no server should implement
+      /// A call that no server should implement
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The response received from the server.</returns>
       public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
       /// <summary>
-      ///  A call that no server should implement
+      /// A call that no server should implement
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return UnimplementedCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  A call that no server should implement
+      /// A call that no server should implement
       /// </summary>
+      /// <param name="request">The request to send to the server.</param>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
       public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnimplementedCall, null, options, request);
@@ -532,6 +669,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(UnimplementedServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
@@ -540,9 +678,9 @@ namespace Grpc.Testing {
 
   }
   /// <summary>
-  ///  A service used to control reconnect server.
+  /// A service used to control reconnect server.
   /// </summary>
-  public static class ReconnectService
+  public static partial class ReconnectService
   {
     static readonly string __ServiceName = "grpc.testing.ReconnectService";
 
@@ -571,7 +709,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Base class for server-side implementations of ReconnectService</summary>
-    public abstract class ReconnectServiceBase
+    public abstract partial class ReconnectServiceBase
     {
       public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> Start(global::Grpc.Testing.ReconnectParams request, ServerCallContext context)
       {
@@ -586,7 +724,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for ReconnectService</summary>
-    public class ReconnectServiceClient : ClientBase<ReconnectServiceClient>
+    public partial class ReconnectServiceClient : ClientBase<ReconnectServiceClient>
     {
       /// <summary>Creates a new client for ReconnectService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
@@ -648,6 +786,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
     public static ServerServiceDefinition BindService(ReconnectServiceBase serviceImpl)
     {
       return ServerServiceDefinition.CreateBuilder()
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index a39fb3a23e..a03ee926f4 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -12,6 +12,6 @@
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
   <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 0225abb414..e47b5953da 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -7,7 +7,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
@@ -29,7 +28,6 @@
       "buildOptions": {
         "define": [ "SIGNED" ],
         "keyFile": "../keys/Grpc.snk",
-        "publicSign": true,
         "xmlDoc": true,
         "compile": {
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
diff --git a/src/csharp/Grpc.Reflection.Tests/.gitignore b/src/csharp/Grpc.Reflection.Tests/.gitignore
new file mode 100644
index 0000000000..1746e3269e
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/.gitignore
@@ -0,0 +1,2 @@
+bin
+obj
diff --git a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
new file mode 100644
index 0000000000..c5918b194e
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{B88F91D6-436D-4C78-8B99-47800FA8DE03}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Grpc.Reflection.Tests</RootNamespace>
+    <AssemblyName>Grpc.Reflection.Tests</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="nunitlite">
+      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\Grpc.Core\Version.cs">
+      <Link>Version.cs</Link>
+    </Compile>
+    <Compile Include="SymbolRegistryTest.cs" />
+    <Compile Include="ReflectionClientServerTest.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="NUnitMain.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Grpc.Core\Grpc.Core.csproj">
+      <Project>{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}</Project>
+      <Name>Grpc.Core</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Grpc.Reflection\Grpc.Reflection.csproj">
+      <Project>{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}</Project>
+      <Name>Grpc.Reflection</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.Reflection.Tests.project.json" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.project.json b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.project.json
new file mode 100644
index 0000000000..c2f5bcb163
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.xproj b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.xproj
new file mode 100644
index 0000000000..4a3100853d
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.xproj
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>fe90181d-a4b3-4a5c-8490-f07561e18e3b</ProjectGuid>
+    <RootNamespace>Grpc.Reflection.Tests</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection.Tests/NUnitMain.cs b/src/csharp/Grpc.Reflection.Tests/NUnitMain.cs
new file mode 100644
index 0000000000..a60d7b03eb
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/NUnitMain.cs
@@ -0,0 +1,59 @@
+#region Copyright notice and license
+
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Reflection;
+using Grpc.Core;
+using Grpc.Core.Logging;
+using NUnit.Common;
+using NUnitLite;
+
+namespace Grpc.Reflection.Tests
+{
+    /// <summary>
+    /// Provides entry point for NUnitLite
+    /// </summary>
+    public class NUnitMain
+    {
+        public static int Main(string[] args)
+        {
+            // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
+            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+#if NETCOREAPP1_0
+            return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
+#else
+            return new AutoRun().Execute(args);
+#endif
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Reflection.Tests/Properties/AssemblyInfo.cs b/src/csharp/Grpc.Reflection.Tests/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..d29054a4d1
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/Properties/AssemblyInfo.cs
@@ -0,0 +1,44 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+[assembly: AssemblyTitle("Grpc.Reflection.Tests")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
diff --git a/src/csharp/Grpc.Reflection.Tests/ReflectionClientServerTest.cs b/src/csharp/Grpc.Reflection.Tests/ReflectionClientServerTest.cs
new file mode 100644
index 0000000000..1d0845e276
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/ReflectionClientServerTest.cs
@@ -0,0 +1,154 @@
+#region Copyright notice and license
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+using Grpc.Reflection;
+using Grpc.Reflection.V1Alpha;
+using NUnit.Framework;
+
+namespace Grpc.Reflection.Tests
+{
+    /// <summary>
+    /// Reflection client talks to reflection server.
+    /// </summary>
+    public class ReflectionClientServerTest
+    {
+        const string Host = "localhost";
+        Server server;
+        Channel channel;
+        ServerReflection.ServerReflectionClient client;
+        ReflectionServiceImpl serviceImpl;
+
+        [TestFixtureSetUp]
+        public void Init()
+        {
+            serviceImpl = new ReflectionServiceImpl(ServerReflection.Descriptor);
+
+            server = new Server
+            {
+                Services = { ServerReflection.BindService(serviceImpl) },
+                Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
+            };
+            server.Start();
+            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
+
+            client = new ServerReflection.ServerReflectionClient(channel);
+        }
+
+        [TestFixtureTearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public async Task FileByFilename_NotFound()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                FileByFilename = "somepackage/nonexistent.proto"
+            });
+            Assert.AreEqual((int)StatusCode.NotFound, response.ErrorResponse.ErrorCode);
+        }
+
+        [Test]
+        public async Task FileByFilename()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                FileByFilename = "grpc/reflection/v1alpha/reflection.proto"
+            });
+            Assert.AreEqual(1, response.FileDescriptorResponse.FileDescriptorProto.Count);
+            Assert.AreEqual(ReflectionReflection.Descriptor.SerializedData, response.FileDescriptorResponse.FileDescriptorProto[0]);
+        }
+
+        [Test]
+        public async Task FileContainingSymbol()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                FileContainingSymbol = "grpc.reflection.v1alpha.ServerReflection"
+            });
+            Assert.AreEqual(1, response.FileDescriptorResponse.FileDescriptorProto.Count);
+            Assert.AreEqual(ReflectionReflection.Descriptor.SerializedData, response.FileDescriptorResponse.FileDescriptorProto[0]);
+        }
+
+        [Test]
+        public async Task FileContainingSymbol_NotFound()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                FileContainingSymbol = "somepackage.Nonexistent"
+            });
+            Assert.AreEqual((int)StatusCode.NotFound, response.ErrorResponse.ErrorCode);
+        }
+
+        [Test]
+        public async Task ListServices()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                ListServices = ""
+            });
+            Assert.AreEqual(1, response.ListServicesResponse.Service.Count);
+            Assert.AreEqual(ServerReflection.Descriptor.FullName, response.ListServicesResponse.Service[0].Name);
+        }
+
+        [Test]
+        public async Task FileContainingExtension()
+        {
+            var response = await SingleRequestAsync(new ServerReflectionRequest
+            {
+                FileContainingExtension = new ExtensionRequest()
+            });
+            Assert.AreEqual((int)StatusCode.Unimplemented, response.ErrorResponse.ErrorCode);
+        }
+
+        private async Task<ServerReflectionResponse> SingleRequestAsync(ServerReflectionRequest request)
+        {
+            var call = client.ServerReflectionInfo();
+            await call.RequestStream.WriteAsync(request);
+            Assert.IsTrue(await call.ResponseStream.MoveNext());
+
+            var response = call.ResponseStream.Current;
+            await call.RequestStream.CompleteAsync();
+            Assert.IsFalse(await call.ResponseStream.MoveNext());
+            return response;
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Reflection.Tests/SymbolRegistryTest.cs b/src/csharp/Grpc.Reflection.Tests/SymbolRegistryTest.cs
new file mode 100644
index 0000000000..68ee6dc10d
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/SymbolRegistryTest.cs
@@ -0,0 +1,63 @@
+#region Copyright notice and license
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using Grpc.Reflection;
+using Grpc.Reflection.V1Alpha;
+using NUnit.Framework;
+
+
+namespace Grpc.Reflection.Tests
+{
+    /// <summary>
+    /// Tests for ReflectionServiceImpl
+    /// </summary>
+    public class SymbolRegistryTest
+    {
+        SymbolRegistry registry = SymbolRegistry.FromFiles(new[] { ReflectionReflection.Descriptor, Google.Protobuf.WellKnownTypes.Duration.Descriptor.File });
+
+        [Test]
+        public void FileByName()
+        {
+            Assert.AreSame(Google.Protobuf.WellKnownTypes.Duration.Descriptor.File, registry.FileByName("google/protobuf/duration.proto"));
+            Assert.IsNull(registry.FileByName("somepackage/nonexistent.proto"));
+        }
+
+        [Test]
+        public void FileContainingSymbol()
+        {
+            Assert.AreSame(Google.Protobuf.WellKnownTypes.Duration.Descriptor.File, registry.FileContainingSymbol("google.protobuf.Duration"));
+            Assert.AreSame(ReflectionReflection.Descriptor, registry.FileContainingSymbol("grpc.reflection.v1alpha.ServerReflection.ServerReflectionInfo"));  // method
+            Assert.AreSame(ReflectionReflection.Descriptor, registry.FileContainingSymbol("grpc.reflection.v1alpha.ServerReflection"));  // service
+            Assert.AreSame(ReflectionReflection.Descriptor, registry.FileContainingSymbol("grpc.reflection.v1alpha.ServerReflectionRequest"));  // message
+            Assert.IsNull(registry.FileContainingSymbol("somepackage.Nonexistent"));
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Reflection.Tests/packages.config b/src/csharp/Grpc.Reflection.Tests/packages.config
new file mode 100644
index 0000000000..0fed4dbd41
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/packages.config
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="NUnit" version="3.2.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+</packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection.Tests/project.json b/src/csharp/Grpc.Reflection.Tests/project.json
new file mode 100644
index 0000000000..61d3b7e47b
--- /dev/null
+++ b/src/csharp/Grpc.Reflection.Tests/project.json
@@ -0,0 +1,65 @@
+{
+  "buildOptions": {
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
+        "copyToOutput": {
+          "mappings": {
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    },
+    "Release": {
+      "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
+        "copyToOutput": {
+          "mappings": {
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
+  },
+
+  "dependencies": {
+    "Grpc.Reflection": {
+      "target": "project"
+    },
+    "NUnit": "3.2.0",
+    "NUnitLite": "3.2.0-*"
+  },
+  "frameworks": {
+    "net45": { },
+    "netcoreapp1.0": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Reflection/.gitignore b/src/csharp/Grpc.Reflection/.gitignore
new file mode 100644
index 0000000000..1746e3269e
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/.gitignore
@@ -0,0 +1,2 @@
+bin
+obj
diff --git a/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
new file mode 100644
index 0000000000..4e254a0b53
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Grpc.Reflection</RootNamespace>
+    <AssemblyName>Grpc.Reflection</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <DocumentationFile>bin\$(Configuration)\Grpc.Reflection.Xml</DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\Grpc.Core\Version.cs">
+      <Link>Version.cs</Link>
+    </Compile>
+    <Compile Include="SymbolRegistry.cs" />
+    <Compile Include="ReflectionServiceImpl.cs" />
+    <Compile Include="Reflection.cs" />
+    <Compile Include="ReflectionGrpc.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.Reflection.project.json" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Grpc.Core\Grpc.Core.csproj">
+      <Project>{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}</Project>
+      <Name>Grpc.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection/Grpc.Reflection.project.json b/src/csharp/Grpc.Reflection/Grpc.Reflection.project.json
new file mode 100644
index 0000000000..c2f5bcb163
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Grpc.Reflection.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Reflection/Grpc.Reflection.xproj b/src/csharp/Grpc.Reflection/Grpc.Reflection.xproj
new file mode 100644
index 0000000000..833d98b121
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Grpc.Reflection.xproj
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>2b372155-80ba-4cf9-82d6-4b938e8ec3a0</ProjectGuid>
+    <RootNamespace>Grpc.Reflection</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection/Properties/AssemblyInfo.cs b/src/csharp/Grpc.Reflection/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..3104ecdd54
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Properties/AssemblyInfo.cs
@@ -0,0 +1,44 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+[assembly: AssemblyTitle("Grpc.Reflection")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
diff --git a/src/csharp/Grpc.Reflection/Reflection.cs b/src/csharp/Grpc.Reflection/Reflection.cs
new file mode 100644
index 0000000000..06c5d08030
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Reflection.cs
@@ -0,0 +1,1556 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: grpc/reflection/v1alpha/reflection.proto
+#pragma warning disable 1591, 0612, 3021
+#region Designer generated code
+
+using pb = global::Google.Protobuf;
+using pbc = global::Google.Protobuf.Collections;
+using pbr = global::Google.Protobuf.Reflection;
+using scg = global::System.Collections.Generic;
+namespace Grpc.Reflection.V1Alpha {
+
+  /// <summary>Holder for reflection information generated from grpc/reflection/v1alpha/reflection.proto</summary>
+  public static partial class ReflectionReflection {
+
+    #region Descriptor
+    /// <summary>File descriptor for grpc/reflection/v1alpha/reflection.proto</summary>
+    public static pbr::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbr::FileDescriptor descriptor;
+
+    static ReflectionReflection() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          string.Concat(
+            "CihncnBjL3JlZmxlY3Rpb24vdjFhbHBoYS9yZWZsZWN0aW9uLnByb3RvEhdn",
+            "cnBjLnJlZmxlY3Rpb24udjFhbHBoYSKKAgoXU2VydmVyUmVmbGVjdGlvblJl",
+            "cXVlc3QSDAoEaG9zdBgBIAEoCRIaChBmaWxlX2J5X2ZpbGVuYW1lGAMgASgJ",
+            "SAASIAoWZmlsZV9jb250YWluaW5nX3N5bWJvbBgEIAEoCUgAEk4KGWZpbGVf",
+            "Y29udGFpbmluZ19leHRlbnNpb24YBSABKAsyKS5ncnBjLnJlZmxlY3Rpb24u",
+            "djFhbHBoYS5FeHRlbnNpb25SZXF1ZXN0SAASJwodYWxsX2V4dGVuc2lvbl9u",
+            "dW1iZXJzX29mX3R5cGUYBiABKAlIABIXCg1saXN0X3NlcnZpY2VzGAcgASgJ",
+            "SABCEQoPbWVzc2FnZV9yZXF1ZXN0IkUKEEV4dGVuc2lvblJlcXVlc3QSFwoP",
+            "Y29udGFpbmluZ190eXBlGAEgASgJEhgKEGV4dGVuc2lvbl9udW1iZXIYAiAB",
+            "KAUi0QMKGFNlcnZlclJlZmxlY3Rpb25SZXNwb25zZRISCgp2YWxpZF9ob3N0",
+            "GAEgASgJEkoKEG9yaWdpbmFsX3JlcXVlc3QYAiABKAsyMC5ncnBjLnJlZmxl",
+            "Y3Rpb24udjFhbHBoYS5TZXJ2ZXJSZWZsZWN0aW9uUmVxdWVzdBJTChhmaWxl",
+            "X2Rlc2NyaXB0b3JfcmVzcG9uc2UYBCABKAsyLy5ncnBjLnJlZmxlY3Rpb24u",
+            "djFhbHBoYS5GaWxlRGVzY3JpcHRvclJlc3BvbnNlSAASWgoeYWxsX2V4dGVu",
+            "c2lvbl9udW1iZXJzX3Jlc3BvbnNlGAUgASgLMjAuZ3JwYy5yZWZsZWN0aW9u",
+            "LnYxYWxwaGEuRXh0ZW5zaW9uTnVtYmVyUmVzcG9uc2VIABJOChZsaXN0X3Nl",
+            "cnZpY2VzX3Jlc3BvbnNlGAYgASgLMiwuZ3JwYy5yZWZsZWN0aW9uLnYxYWxw",
+            "aGEuTGlzdFNlcnZpY2VSZXNwb25zZUgAEkAKDmVycm9yX3Jlc3BvbnNlGAcg",
+            "ASgLMiYuZ3JwYy5yZWZsZWN0aW9uLnYxYWxwaGEuRXJyb3JSZXNwb25zZUgA",
+            "QhIKEG1lc3NhZ2VfcmVzcG9uc2UiNwoWRmlsZURlc2NyaXB0b3JSZXNwb25z",
+            "ZRIdChVmaWxlX2Rlc2NyaXB0b3JfcHJvdG8YASADKAwiSwoXRXh0ZW5zaW9u",
+            "TnVtYmVyUmVzcG9uc2USFgoOYmFzZV90eXBlX25hbWUYASABKAkSGAoQZXh0",
+            "ZW5zaW9uX251bWJlchgCIAMoBSJQChNMaXN0U2VydmljZVJlc3BvbnNlEjkK",
+            "B3NlcnZpY2UYASADKAsyKC5ncnBjLnJlZmxlY3Rpb24udjFhbHBoYS5TZXJ2",
+            "aWNlUmVzcG9uc2UiHwoPU2VydmljZVJlc3BvbnNlEgwKBG5hbWUYASABKAki",
+            "OgoNRXJyb3JSZXNwb25zZRISCgplcnJvcl9jb2RlGAEgASgFEhUKDWVycm9y",
+            "X21lc3NhZ2UYAiABKAkykwEKEFNlcnZlclJlZmxlY3Rpb24SfwoUU2VydmVy",
+            "UmVmbGVjdGlvbkluZm8SMC5ncnBjLnJlZmxlY3Rpb24udjFhbHBoYS5TZXJ2",
+            "ZXJSZWZsZWN0aW9uUmVxdWVzdBoxLmdycGMucmVmbGVjdGlvbi52MWFscGhh",
+            "LlNlcnZlclJlZmxlY3Rpb25SZXNwb25zZSgBMAFiBnByb3RvMw=="));
+      descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
+          new pbr::FileDescriptor[] { },
+          new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ServerReflectionRequest), global::Grpc.Reflection.V1Alpha.ServerReflectionRequest.Parser, new[]{ "Host", "FileByFilename", "FileContainingSymbol", "FileContainingExtension", "AllExtensionNumbersOfType", "ListServices" }, new[]{ "MessageRequest" }, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ExtensionRequest), global::Grpc.Reflection.V1Alpha.ExtensionRequest.Parser, new[]{ "ContainingType", "ExtensionNumber" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ServerReflectionResponse), global::Grpc.Reflection.V1Alpha.ServerReflectionResponse.Parser, new[]{ "ValidHost", "OriginalRequest", "FileDescriptorResponse", "AllExtensionNumbersResponse", "ListServicesResponse", "ErrorResponse" }, new[]{ "MessageResponse" }, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.FileDescriptorResponse), global::Grpc.Reflection.V1Alpha.FileDescriptorResponse.Parser, new[]{ "FileDescriptorProto" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse), global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse.Parser, new[]{ "BaseTypeName", "ExtensionNumber" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ListServiceResponse), global::Grpc.Reflection.V1Alpha.ListServiceResponse.Parser, new[]{ "Service" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ServiceResponse), global::Grpc.Reflection.V1Alpha.ServiceResponse.Parser, new[]{ "Name" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Reflection.V1Alpha.ErrorResponse), global::Grpc.Reflection.V1Alpha.ErrorResponse.Parser, new[]{ "ErrorCode", "ErrorMessage" }, null, null, null)
+          }));
+    }
+    #endregion
+
+  }
+  #region Messages
+  /// <summary>
+  ///  The message sent by the client when calling ServerReflectionInfo method.
+  /// </summary>
+  public sealed partial class ServerReflectionRequest : pb::IMessage<ServerReflectionRequest> {
+    private static readonly pb::MessageParser<ServerReflectionRequest> _parser = new pb::MessageParser<ServerReflectionRequest>(() => new ServerReflectionRequest());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ServerReflectionRequest> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[0]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionRequest() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionRequest(ServerReflectionRequest other) : this() {
+      host_ = other.host_;
+      switch (other.MessageRequestCase) {
+        case MessageRequestOneofCase.FileByFilename:
+          FileByFilename = other.FileByFilename;
+          break;
+        case MessageRequestOneofCase.FileContainingSymbol:
+          FileContainingSymbol = other.FileContainingSymbol;
+          break;
+        case MessageRequestOneofCase.FileContainingExtension:
+          FileContainingExtension = other.FileContainingExtension.Clone();
+          break;
+        case MessageRequestOneofCase.AllExtensionNumbersOfType:
+          AllExtensionNumbersOfType = other.AllExtensionNumbersOfType;
+          break;
+        case MessageRequestOneofCase.ListServices:
+          ListServices = other.ListServices;
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionRequest Clone() {
+      return new ServerReflectionRequest(this);
+    }
+
+    /// <summary>Field number for the "host" field.</summary>
+    public const int HostFieldNumber = 1;
+    private string host_ = "";
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string Host {
+      get { return host_; }
+      set {
+        host_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "file_by_filename" field.</summary>
+    public const int FileByFilenameFieldNumber = 3;
+    /// <summary>
+    ///  Find a proto file by the file name.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string FileByFilename {
+      get { return messageRequestCase_ == MessageRequestOneofCase.FileByFilename ? (string) messageRequest_ : ""; }
+      set {
+        messageRequest_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+        messageRequestCase_ = MessageRequestOneofCase.FileByFilename;
+      }
+    }
+
+    /// <summary>Field number for the "file_containing_symbol" field.</summary>
+    public const int FileContainingSymbolFieldNumber = 4;
+    /// <summary>
+    ///  Find the proto file that declares the given fully-qualified symbol name.
+    ///  This field should be a fully-qualified symbol name
+    ///  (e.g. &lt;package>.&lt;service>[.&lt;method>] or &lt;package>.&lt;type>).
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string FileContainingSymbol {
+      get { return messageRequestCase_ == MessageRequestOneofCase.FileContainingSymbol ? (string) messageRequest_ : ""; }
+      set {
+        messageRequest_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+        messageRequestCase_ = MessageRequestOneofCase.FileContainingSymbol;
+      }
+    }
+
+    /// <summary>Field number for the "file_containing_extension" field.</summary>
+    public const int FileContainingExtensionFieldNumber = 5;
+    /// <summary>
+    ///  Find the proto file which defines an extension extending the given
+    ///  message type with the given field number.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.ExtensionRequest FileContainingExtension {
+      get { return messageRequestCase_ == MessageRequestOneofCase.FileContainingExtension ? (global::Grpc.Reflection.V1Alpha.ExtensionRequest) messageRequest_ : null; }
+      set {
+        messageRequest_ = value;
+        messageRequestCase_ = value == null ? MessageRequestOneofCase.None : MessageRequestOneofCase.FileContainingExtension;
+      }
+    }
+
+    /// <summary>Field number for the "all_extension_numbers_of_type" field.</summary>
+    public const int AllExtensionNumbersOfTypeFieldNumber = 6;
+    /// <summary>
+    ///  Finds the tag numbers used by all known extensions of the given message
+    ///  type, and appends them to ExtensionNumberResponse in an undefined order.
+    ///  Its corresponding method is best-effort: it's not guaranteed that the
+    ///  reflection service will implement this method, and it's not guaranteed
+    ///  that this method will provide all extensions. Returns
+    ///  StatusCode::UNIMPLEMENTED if it's not implemented.
+    ///  This field should be a fully-qualified type name. The format is
+    ///  &lt;package>.&lt;type>
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string AllExtensionNumbersOfType {
+      get { return messageRequestCase_ == MessageRequestOneofCase.AllExtensionNumbersOfType ? (string) messageRequest_ : ""; }
+      set {
+        messageRequest_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+        messageRequestCase_ = MessageRequestOneofCase.AllExtensionNumbersOfType;
+      }
+    }
+
+    /// <summary>Field number for the "list_services" field.</summary>
+    public const int ListServicesFieldNumber = 7;
+    /// <summary>
+    ///  List the full names of registered services. The content will not be
+    ///  checked.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string ListServices {
+      get { return messageRequestCase_ == MessageRequestOneofCase.ListServices ? (string) messageRequest_ : ""; }
+      set {
+        messageRequest_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+        messageRequestCase_ = MessageRequestOneofCase.ListServices;
+      }
+    }
+
+    private object messageRequest_;
+    /// <summary>Enum of possible cases for the "message_request" oneof.</summary>
+    public enum MessageRequestOneofCase {
+      None = 0,
+      FileByFilename = 3,
+      FileContainingSymbol = 4,
+      FileContainingExtension = 5,
+      AllExtensionNumbersOfType = 6,
+      ListServices = 7,
+    }
+    private MessageRequestOneofCase messageRequestCase_ = MessageRequestOneofCase.None;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public MessageRequestOneofCase MessageRequestCase {
+      get { return messageRequestCase_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void ClearMessageRequest() {
+      messageRequestCase_ = MessageRequestOneofCase.None;
+      messageRequest_ = null;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ServerReflectionRequest);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ServerReflectionRequest other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Host != other.Host) return false;
+      if (FileByFilename != other.FileByFilename) return false;
+      if (FileContainingSymbol != other.FileContainingSymbol) return false;
+      if (!object.Equals(FileContainingExtension, other.FileContainingExtension)) return false;
+      if (AllExtensionNumbersOfType != other.AllExtensionNumbersOfType) return false;
+      if (ListServices != other.ListServices) return false;
+      if (MessageRequestCase != other.MessageRequestCase) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Host.Length != 0) hash ^= Host.GetHashCode();
+      if (messageRequestCase_ == MessageRequestOneofCase.FileByFilename) hash ^= FileByFilename.GetHashCode();
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingSymbol) hash ^= FileContainingSymbol.GetHashCode();
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingExtension) hash ^= FileContainingExtension.GetHashCode();
+      if (messageRequestCase_ == MessageRequestOneofCase.AllExtensionNumbersOfType) hash ^= AllExtensionNumbersOfType.GetHashCode();
+      if (messageRequestCase_ == MessageRequestOneofCase.ListServices) hash ^= ListServices.GetHashCode();
+      hash ^= (int) messageRequestCase_;
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Host.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(Host);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileByFilename) {
+        output.WriteRawTag(26);
+        output.WriteString(FileByFilename);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingSymbol) {
+        output.WriteRawTag(34);
+        output.WriteString(FileContainingSymbol);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingExtension) {
+        output.WriteRawTag(42);
+        output.WriteMessage(FileContainingExtension);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.AllExtensionNumbersOfType) {
+        output.WriteRawTag(50);
+        output.WriteString(AllExtensionNumbersOfType);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.ListServices) {
+        output.WriteRawTag(58);
+        output.WriteString(ListServices);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Host.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(Host);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileByFilename) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(FileByFilename);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingSymbol) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(FileContainingSymbol);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.FileContainingExtension) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(FileContainingExtension);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.AllExtensionNumbersOfType) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(AllExtensionNumbersOfType);
+      }
+      if (messageRequestCase_ == MessageRequestOneofCase.ListServices) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(ListServices);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ServerReflectionRequest other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Host.Length != 0) {
+        Host = other.Host;
+      }
+      switch (other.MessageRequestCase) {
+        case MessageRequestOneofCase.FileByFilename:
+          FileByFilename = other.FileByFilename;
+          break;
+        case MessageRequestOneofCase.FileContainingSymbol:
+          FileContainingSymbol = other.FileContainingSymbol;
+          break;
+        case MessageRequestOneofCase.FileContainingExtension:
+          FileContainingExtension = other.FileContainingExtension;
+          break;
+        case MessageRequestOneofCase.AllExtensionNumbersOfType:
+          AllExtensionNumbersOfType = other.AllExtensionNumbersOfType;
+          break;
+        case MessageRequestOneofCase.ListServices:
+          ListServices = other.ListServices;
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            Host = input.ReadString();
+            break;
+          }
+          case 26: {
+            FileByFilename = input.ReadString();
+            break;
+          }
+          case 34: {
+            FileContainingSymbol = input.ReadString();
+            break;
+          }
+          case 42: {
+            global::Grpc.Reflection.V1Alpha.ExtensionRequest subBuilder = new global::Grpc.Reflection.V1Alpha.ExtensionRequest();
+            if (messageRequestCase_ == MessageRequestOneofCase.FileContainingExtension) {
+              subBuilder.MergeFrom(FileContainingExtension);
+            }
+            input.ReadMessage(subBuilder);
+            FileContainingExtension = subBuilder;
+            break;
+          }
+          case 50: {
+            AllExtensionNumbersOfType = input.ReadString();
+            break;
+          }
+          case 58: {
+            ListServices = input.ReadString();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  The type name and extension number sent by the client when requesting
+  ///  file_containing_extension.
+  /// </summary>
+  public sealed partial class ExtensionRequest : pb::IMessage<ExtensionRequest> {
+    private static readonly pb::MessageParser<ExtensionRequest> _parser = new pb::MessageParser<ExtensionRequest>(() => new ExtensionRequest());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ExtensionRequest> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[1]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionRequest() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionRequest(ExtensionRequest other) : this() {
+      containingType_ = other.containingType_;
+      extensionNumber_ = other.extensionNumber_;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionRequest Clone() {
+      return new ExtensionRequest(this);
+    }
+
+    /// <summary>Field number for the "containing_type" field.</summary>
+    public const int ContainingTypeFieldNumber = 1;
+    private string containingType_ = "";
+    /// <summary>
+    ///  Fully-qualified type name. The format should be &lt;package>.&lt;type>
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string ContainingType {
+      get { return containingType_; }
+      set {
+        containingType_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "extension_number" field.</summary>
+    public const int ExtensionNumberFieldNumber = 2;
+    private int extensionNumber_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int ExtensionNumber {
+      get { return extensionNumber_; }
+      set {
+        extensionNumber_ = value;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ExtensionRequest);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ExtensionRequest other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (ContainingType != other.ContainingType) return false;
+      if (ExtensionNumber != other.ExtensionNumber) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (ContainingType.Length != 0) hash ^= ContainingType.GetHashCode();
+      if (ExtensionNumber != 0) hash ^= ExtensionNumber.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (ContainingType.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(ContainingType);
+      }
+      if (ExtensionNumber != 0) {
+        output.WriteRawTag(16);
+        output.WriteInt32(ExtensionNumber);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (ContainingType.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(ContainingType);
+      }
+      if (ExtensionNumber != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(ExtensionNumber);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ExtensionRequest other) {
+      if (other == null) {
+        return;
+      }
+      if (other.ContainingType.Length != 0) {
+        ContainingType = other.ContainingType;
+      }
+      if (other.ExtensionNumber != 0) {
+        ExtensionNumber = other.ExtensionNumber;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            ContainingType = input.ReadString();
+            break;
+          }
+          case 16: {
+            ExtensionNumber = input.ReadInt32();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  The message sent by the server to answer ServerReflectionInfo method.
+  /// </summary>
+  public sealed partial class ServerReflectionResponse : pb::IMessage<ServerReflectionResponse> {
+    private static readonly pb::MessageParser<ServerReflectionResponse> _parser = new pb::MessageParser<ServerReflectionResponse>(() => new ServerReflectionResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ServerReflectionResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[2]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionResponse(ServerReflectionResponse other) : this() {
+      validHost_ = other.validHost_;
+      OriginalRequest = other.originalRequest_ != null ? other.OriginalRequest.Clone() : null;
+      switch (other.MessageResponseCase) {
+        case MessageResponseOneofCase.FileDescriptorResponse:
+          FileDescriptorResponse = other.FileDescriptorResponse.Clone();
+          break;
+        case MessageResponseOneofCase.AllExtensionNumbersResponse:
+          AllExtensionNumbersResponse = other.AllExtensionNumbersResponse.Clone();
+          break;
+        case MessageResponseOneofCase.ListServicesResponse:
+          ListServicesResponse = other.ListServicesResponse.Clone();
+          break;
+        case MessageResponseOneofCase.ErrorResponse:
+          ErrorResponse = other.ErrorResponse.Clone();
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServerReflectionResponse Clone() {
+      return new ServerReflectionResponse(this);
+    }
+
+    /// <summary>Field number for the "valid_host" field.</summary>
+    public const int ValidHostFieldNumber = 1;
+    private string validHost_ = "";
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string ValidHost {
+      get { return validHost_; }
+      set {
+        validHost_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "original_request" field.</summary>
+    public const int OriginalRequestFieldNumber = 2;
+    private global::Grpc.Reflection.V1Alpha.ServerReflectionRequest originalRequest_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.ServerReflectionRequest OriginalRequest {
+      get { return originalRequest_; }
+      set {
+        originalRequest_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "file_descriptor_response" field.</summary>
+    public const int FileDescriptorResponseFieldNumber = 4;
+    /// <summary>
+    ///  This message is used to answer file_by_filename, file_containing_symbol,
+    ///  file_containing_extension requests with transitive dependencies. As
+    ///  the repeated label is not allowed in oneof fields, we use a
+    ///  FileDescriptorResponse message to encapsulate the repeated fields.
+    ///  The reflection service is allowed to avoid sending FileDescriptorProtos
+    ///  that were previously sent in response to earlier requests in the stream.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.FileDescriptorResponse FileDescriptorResponse {
+      get { return messageResponseCase_ == MessageResponseOneofCase.FileDescriptorResponse ? (global::Grpc.Reflection.V1Alpha.FileDescriptorResponse) messageResponse_ : null; }
+      set {
+        messageResponse_ = value;
+        messageResponseCase_ = value == null ? MessageResponseOneofCase.None : MessageResponseOneofCase.FileDescriptorResponse;
+      }
+    }
+
+    /// <summary>Field number for the "all_extension_numbers_response" field.</summary>
+    public const int AllExtensionNumbersResponseFieldNumber = 5;
+    /// <summary>
+    ///  This message is used to answer all_extension_numbers_of_type requst.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse AllExtensionNumbersResponse {
+      get { return messageResponseCase_ == MessageResponseOneofCase.AllExtensionNumbersResponse ? (global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse) messageResponse_ : null; }
+      set {
+        messageResponse_ = value;
+        messageResponseCase_ = value == null ? MessageResponseOneofCase.None : MessageResponseOneofCase.AllExtensionNumbersResponse;
+      }
+    }
+
+    /// <summary>Field number for the "list_services_response" field.</summary>
+    public const int ListServicesResponseFieldNumber = 6;
+    /// <summary>
+    ///  This message is used to answer list_services request.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.ListServiceResponse ListServicesResponse {
+      get { return messageResponseCase_ == MessageResponseOneofCase.ListServicesResponse ? (global::Grpc.Reflection.V1Alpha.ListServiceResponse) messageResponse_ : null; }
+      set {
+        messageResponse_ = value;
+        messageResponseCase_ = value == null ? MessageResponseOneofCase.None : MessageResponseOneofCase.ListServicesResponse;
+      }
+    }
+
+    /// <summary>Field number for the "error_response" field.</summary>
+    public const int ErrorResponseFieldNumber = 7;
+    /// <summary>
+    ///  This message is used when an error occurs.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Reflection.V1Alpha.ErrorResponse ErrorResponse {
+      get { return messageResponseCase_ == MessageResponseOneofCase.ErrorResponse ? (global::Grpc.Reflection.V1Alpha.ErrorResponse) messageResponse_ : null; }
+      set {
+        messageResponse_ = value;
+        messageResponseCase_ = value == null ? MessageResponseOneofCase.None : MessageResponseOneofCase.ErrorResponse;
+      }
+    }
+
+    private object messageResponse_;
+    /// <summary>Enum of possible cases for the "message_response" oneof.</summary>
+    public enum MessageResponseOneofCase {
+      None = 0,
+      FileDescriptorResponse = 4,
+      AllExtensionNumbersResponse = 5,
+      ListServicesResponse = 6,
+      ErrorResponse = 7,
+    }
+    private MessageResponseOneofCase messageResponseCase_ = MessageResponseOneofCase.None;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public MessageResponseOneofCase MessageResponseCase {
+      get { return messageResponseCase_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void ClearMessageResponse() {
+      messageResponseCase_ = MessageResponseOneofCase.None;
+      messageResponse_ = null;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ServerReflectionResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ServerReflectionResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (ValidHost != other.ValidHost) return false;
+      if (!object.Equals(OriginalRequest, other.OriginalRequest)) return false;
+      if (!object.Equals(FileDescriptorResponse, other.FileDescriptorResponse)) return false;
+      if (!object.Equals(AllExtensionNumbersResponse, other.AllExtensionNumbersResponse)) return false;
+      if (!object.Equals(ListServicesResponse, other.ListServicesResponse)) return false;
+      if (!object.Equals(ErrorResponse, other.ErrorResponse)) return false;
+      if (MessageResponseCase != other.MessageResponseCase) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (ValidHost.Length != 0) hash ^= ValidHost.GetHashCode();
+      if (originalRequest_ != null) hash ^= OriginalRequest.GetHashCode();
+      if (messageResponseCase_ == MessageResponseOneofCase.FileDescriptorResponse) hash ^= FileDescriptorResponse.GetHashCode();
+      if (messageResponseCase_ == MessageResponseOneofCase.AllExtensionNumbersResponse) hash ^= AllExtensionNumbersResponse.GetHashCode();
+      if (messageResponseCase_ == MessageResponseOneofCase.ListServicesResponse) hash ^= ListServicesResponse.GetHashCode();
+      if (messageResponseCase_ == MessageResponseOneofCase.ErrorResponse) hash ^= ErrorResponse.GetHashCode();
+      hash ^= (int) messageResponseCase_;
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (ValidHost.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(ValidHost);
+      }
+      if (originalRequest_ != null) {
+        output.WriteRawTag(18);
+        output.WriteMessage(OriginalRequest);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.FileDescriptorResponse) {
+        output.WriteRawTag(34);
+        output.WriteMessage(FileDescriptorResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.AllExtensionNumbersResponse) {
+        output.WriteRawTag(42);
+        output.WriteMessage(AllExtensionNumbersResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.ListServicesResponse) {
+        output.WriteRawTag(50);
+        output.WriteMessage(ListServicesResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.ErrorResponse) {
+        output.WriteRawTag(58);
+        output.WriteMessage(ErrorResponse);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (ValidHost.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(ValidHost);
+      }
+      if (originalRequest_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(OriginalRequest);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.FileDescriptorResponse) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(FileDescriptorResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.AllExtensionNumbersResponse) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(AllExtensionNumbersResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.ListServicesResponse) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ListServicesResponse);
+      }
+      if (messageResponseCase_ == MessageResponseOneofCase.ErrorResponse) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ErrorResponse);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ServerReflectionResponse other) {
+      if (other == null) {
+        return;
+      }
+      if (other.ValidHost.Length != 0) {
+        ValidHost = other.ValidHost;
+      }
+      if (other.originalRequest_ != null) {
+        if (originalRequest_ == null) {
+          originalRequest_ = new global::Grpc.Reflection.V1Alpha.ServerReflectionRequest();
+        }
+        OriginalRequest.MergeFrom(other.OriginalRequest);
+      }
+      switch (other.MessageResponseCase) {
+        case MessageResponseOneofCase.FileDescriptorResponse:
+          FileDescriptorResponse = other.FileDescriptorResponse;
+          break;
+        case MessageResponseOneofCase.AllExtensionNumbersResponse:
+          AllExtensionNumbersResponse = other.AllExtensionNumbersResponse;
+          break;
+        case MessageResponseOneofCase.ListServicesResponse:
+          ListServicesResponse = other.ListServicesResponse;
+          break;
+        case MessageResponseOneofCase.ErrorResponse:
+          ErrorResponse = other.ErrorResponse;
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            ValidHost = input.ReadString();
+            break;
+          }
+          case 18: {
+            if (originalRequest_ == null) {
+              originalRequest_ = new global::Grpc.Reflection.V1Alpha.ServerReflectionRequest();
+            }
+            input.ReadMessage(originalRequest_);
+            break;
+          }
+          case 34: {
+            global::Grpc.Reflection.V1Alpha.FileDescriptorResponse subBuilder = new global::Grpc.Reflection.V1Alpha.FileDescriptorResponse();
+            if (messageResponseCase_ == MessageResponseOneofCase.FileDescriptorResponse) {
+              subBuilder.MergeFrom(FileDescriptorResponse);
+            }
+            input.ReadMessage(subBuilder);
+            FileDescriptorResponse = subBuilder;
+            break;
+          }
+          case 42: {
+            global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse subBuilder = new global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse();
+            if (messageResponseCase_ == MessageResponseOneofCase.AllExtensionNumbersResponse) {
+              subBuilder.MergeFrom(AllExtensionNumbersResponse);
+            }
+            input.ReadMessage(subBuilder);
+            AllExtensionNumbersResponse = subBuilder;
+            break;
+          }
+          case 50: {
+            global::Grpc.Reflection.V1Alpha.ListServiceResponse subBuilder = new global::Grpc.Reflection.V1Alpha.ListServiceResponse();
+            if (messageResponseCase_ == MessageResponseOneofCase.ListServicesResponse) {
+              subBuilder.MergeFrom(ListServicesResponse);
+            }
+            input.ReadMessage(subBuilder);
+            ListServicesResponse = subBuilder;
+            break;
+          }
+          case 58: {
+            global::Grpc.Reflection.V1Alpha.ErrorResponse subBuilder = new global::Grpc.Reflection.V1Alpha.ErrorResponse();
+            if (messageResponseCase_ == MessageResponseOneofCase.ErrorResponse) {
+              subBuilder.MergeFrom(ErrorResponse);
+            }
+            input.ReadMessage(subBuilder);
+            ErrorResponse = subBuilder;
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  Serialized FileDescriptorProto messages sent by the server answering
+  ///  a file_by_filename, file_containing_symbol, or file_containing_extension
+  ///  request.
+  /// </summary>
+  public sealed partial class FileDescriptorResponse : pb::IMessage<FileDescriptorResponse> {
+    private static readonly pb::MessageParser<FileDescriptorResponse> _parser = new pb::MessageParser<FileDescriptorResponse>(() => new FileDescriptorResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<FileDescriptorResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[3]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public FileDescriptorResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public FileDescriptorResponse(FileDescriptorResponse other) : this() {
+      fileDescriptorProto_ = other.fileDescriptorProto_.Clone();
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public FileDescriptorResponse Clone() {
+      return new FileDescriptorResponse(this);
+    }
+
+    /// <summary>Field number for the "file_descriptor_proto" field.</summary>
+    public const int FileDescriptorProtoFieldNumber = 1;
+    private static readonly pb::FieldCodec<pb::ByteString> _repeated_fileDescriptorProto_codec
+        = pb::FieldCodec.ForBytes(10);
+    private readonly pbc::RepeatedField<pb::ByteString> fileDescriptorProto_ = new pbc::RepeatedField<pb::ByteString>();
+    /// <summary>
+    ///  Serialized FileDescriptorProto messages. We avoid taking a dependency on
+    ///  descriptor.proto, which uses proto2 only features, by making them opaque
+    ///  bytes instead.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<pb::ByteString> FileDescriptorProto {
+      get { return fileDescriptorProto_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as FileDescriptorResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(FileDescriptorResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if(!fileDescriptorProto_.Equals(other.fileDescriptorProto_)) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      hash ^= fileDescriptorProto_.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      fileDescriptorProto_.WriteTo(output, _repeated_fileDescriptorProto_codec);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      size += fileDescriptorProto_.CalculateSize(_repeated_fileDescriptorProto_codec);
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(FileDescriptorResponse other) {
+      if (other == null) {
+        return;
+      }
+      fileDescriptorProto_.Add(other.fileDescriptorProto_);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            fileDescriptorProto_.AddEntriesFrom(input, _repeated_fileDescriptorProto_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  A list of extension numbers sent by the server answering
+  ///  all_extension_numbers_of_type request.
+  /// </summary>
+  public sealed partial class ExtensionNumberResponse : pb::IMessage<ExtensionNumberResponse> {
+    private static readonly pb::MessageParser<ExtensionNumberResponse> _parser = new pb::MessageParser<ExtensionNumberResponse>(() => new ExtensionNumberResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ExtensionNumberResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[4]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionNumberResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionNumberResponse(ExtensionNumberResponse other) : this() {
+      baseTypeName_ = other.baseTypeName_;
+      extensionNumber_ = other.extensionNumber_.Clone();
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ExtensionNumberResponse Clone() {
+      return new ExtensionNumberResponse(this);
+    }
+
+    /// <summary>Field number for the "base_type_name" field.</summary>
+    public const int BaseTypeNameFieldNumber = 1;
+    private string baseTypeName_ = "";
+    /// <summary>
+    ///  Full name of the base type, including the package name. The format
+    ///  is &lt;package>.&lt;type>
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string BaseTypeName {
+      get { return baseTypeName_; }
+      set {
+        baseTypeName_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "extension_number" field.</summary>
+    public const int ExtensionNumberFieldNumber = 2;
+    private static readonly pb::FieldCodec<int> _repeated_extensionNumber_codec
+        = pb::FieldCodec.ForInt32(18);
+    private readonly pbc::RepeatedField<int> extensionNumber_ = new pbc::RepeatedField<int>();
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<int> ExtensionNumber {
+      get { return extensionNumber_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ExtensionNumberResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ExtensionNumberResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (BaseTypeName != other.BaseTypeName) return false;
+      if(!extensionNumber_.Equals(other.extensionNumber_)) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (BaseTypeName.Length != 0) hash ^= BaseTypeName.GetHashCode();
+      hash ^= extensionNumber_.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (BaseTypeName.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(BaseTypeName);
+      }
+      extensionNumber_.WriteTo(output, _repeated_extensionNumber_codec);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (BaseTypeName.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(BaseTypeName);
+      }
+      size += extensionNumber_.CalculateSize(_repeated_extensionNumber_codec);
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ExtensionNumberResponse other) {
+      if (other == null) {
+        return;
+      }
+      if (other.BaseTypeName.Length != 0) {
+        BaseTypeName = other.BaseTypeName;
+      }
+      extensionNumber_.Add(other.extensionNumber_);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            BaseTypeName = input.ReadString();
+            break;
+          }
+          case 18:
+          case 16: {
+            extensionNumber_.AddEntriesFrom(input, _repeated_extensionNumber_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  A list of ServiceResponse sent by the server answering list_services request.
+  /// </summary>
+  public sealed partial class ListServiceResponse : pb::IMessage<ListServiceResponse> {
+    private static readonly pb::MessageParser<ListServiceResponse> _parser = new pb::MessageParser<ListServiceResponse>(() => new ListServiceResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ListServiceResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[5]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ListServiceResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ListServiceResponse(ListServiceResponse other) : this() {
+      service_ = other.service_.Clone();
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ListServiceResponse Clone() {
+      return new ListServiceResponse(this);
+    }
+
+    /// <summary>Field number for the "service" field.</summary>
+    public const int ServiceFieldNumber = 1;
+    private static readonly pb::FieldCodec<global::Grpc.Reflection.V1Alpha.ServiceResponse> _repeated_service_codec
+        = pb::FieldCodec.ForMessage(10, global::Grpc.Reflection.V1Alpha.ServiceResponse.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse> service_ = new pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse>();
+    /// <summary>
+    ///  The information of each service may be expanded in the future, so we use
+    ///  ServiceResponse message to encapsulate it.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse> Service {
+      get { return service_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ListServiceResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ListServiceResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if(!service_.Equals(other.service_)) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      hash ^= service_.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      service_.WriteTo(output, _repeated_service_codec);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      size += service_.CalculateSize(_repeated_service_codec);
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ListServiceResponse other) {
+      if (other == null) {
+        return;
+      }
+      service_.Add(other.service_);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            service_.AddEntriesFrom(input, _repeated_service_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  The information of a single service used by ListServiceResponse to answer
+  ///  list_services request.
+  /// </summary>
+  public sealed partial class ServiceResponse : pb::IMessage<ServiceResponse> {
+    private static readonly pb::MessageParser<ServiceResponse> _parser = new pb::MessageParser<ServiceResponse>(() => new ServiceResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ServiceResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[6]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServiceResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServiceResponse(ServiceResponse other) : this() {
+      name_ = other.name_;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ServiceResponse Clone() {
+      return new ServiceResponse(this);
+    }
+
+    /// <summary>Field number for the "name" field.</summary>
+    public const int NameFieldNumber = 1;
+    private string name_ = "";
+    /// <summary>
+    ///  Full name of a registered service, including its package name. The format
+    ///  is &lt;package>.&lt;service>
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string Name {
+      get { return name_; }
+      set {
+        name_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ServiceResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ServiceResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Name != other.Name) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Name.Length != 0) hash ^= Name.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Name.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(Name);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Name.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(Name);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ServiceResponse other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Name.Length != 0) {
+        Name = other.Name;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            Name = input.ReadString();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  /// <summary>
+  ///  The error code and error message sent by the server when an error occurs.
+  /// </summary>
+  public sealed partial class ErrorResponse : pb::IMessage<ErrorResponse> {
+    private static readonly pb::MessageParser<ErrorResponse> _parser = new pb::MessageParser<ErrorResponse>(() => new ErrorResponse());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ErrorResponse> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.MessageTypes[7]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ErrorResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ErrorResponse(ErrorResponse other) : this() {
+      errorCode_ = other.errorCode_;
+      errorMessage_ = other.errorMessage_;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ErrorResponse Clone() {
+      return new ErrorResponse(this);
+    }
+
+    /// <summary>Field number for the "error_code" field.</summary>
+    public const int ErrorCodeFieldNumber = 1;
+    private int errorCode_;
+    /// <summary>
+    ///  This field uses the error codes defined in grpc::StatusCode.
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int ErrorCode {
+      get { return errorCode_; }
+      set {
+        errorCode_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "error_message" field.</summary>
+    public const int ErrorMessageFieldNumber = 2;
+    private string errorMessage_ = "";
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string ErrorMessage {
+      get { return errorMessage_; }
+      set {
+        errorMessage_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ErrorResponse);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ErrorResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (ErrorCode != other.ErrorCode) return false;
+      if (ErrorMessage != other.ErrorMessage) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (ErrorCode != 0) hash ^= ErrorCode.GetHashCode();
+      if (ErrorMessage.Length != 0) hash ^= ErrorMessage.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (ErrorCode != 0) {
+        output.WriteRawTag(8);
+        output.WriteInt32(ErrorCode);
+      }
+      if (ErrorMessage.Length != 0) {
+        output.WriteRawTag(18);
+        output.WriteString(ErrorMessage);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (ErrorCode != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(ErrorCode);
+      }
+      if (ErrorMessage.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(ErrorMessage);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ErrorResponse other) {
+      if (other == null) {
+        return;
+      }
+      if (other.ErrorCode != 0) {
+        ErrorCode = other.ErrorCode;
+      }
+      if (other.ErrorMessage.Length != 0) {
+        ErrorMessage = other.ErrorMessage;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            ErrorCode = input.ReadInt32();
+            break;
+          }
+          case 18: {
+            ErrorMessage = input.ReadString();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  #endregion
+
+}
+
+#endregion Designer generated code
diff --git a/src/csharp/Grpc.Reflection/ReflectionGrpc.cs b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
new file mode 100644
index 0000000000..5bd7558be5
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
@@ -0,0 +1,143 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: grpc/reflection/v1alpha/reflection.proto
+// Original file comments:
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Service exported by server reflection
+//
+#region Designer generated code
+
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+
+namespace Grpc.Reflection.V1Alpha {
+  public static partial class ServerReflection
+  {
+    static readonly string __ServiceName = "grpc.reflection.v1alpha.ServerReflection";
+
+    static readonly Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> __Marshaller_ServerReflectionRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionRequest.Parser.ParseFrom);
+    static readonly Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Marshaller_ServerReflectionResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionResponse.Parser.ParseFrom);
+
+    static readonly Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Method_ServerReflectionInfo = new Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse>(
+        MethodType.DuplexStreaming,
+        __ServiceName,
+        "ServerReflectionInfo",
+        __Marshaller_ServerReflectionRequest,
+        __Marshaller_ServerReflectionResponse);
+
+    /// <summary>Service descriptor</summary>
+    public static global::Google.Protobuf.Reflection.ServiceDescriptor Descriptor
+    {
+      get { return global::Grpc.Reflection.V1Alpha.ReflectionReflection.Descriptor.Services[0]; }
+    }
+
+    /// <summary>Base class for server-side implementations of ServerReflection</summary>
+    public abstract partial class ServerReflectionBase
+    {
+      /// <summary>
+      /// The reflection service is structured as a bidirectional stream, ensuring
+      /// all related requests go to a single server.
+      /// </summary>
+      /// <param name="requestStream">Used for reading requests from the client.</param>
+      /// <param name="responseStream">Used for sending responses back to the client.</param>
+      /// <param name="context">The context of the server-side call handler being invoked.</param>
+      /// <returns>A task indicating completion of the handler.</returns>
+      public virtual global::System.Threading.Tasks.Task ServerReflectionInfo(IAsyncStreamReader<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> requestStream, IServerStreamWriter<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> responseStream, ServerCallContext context)
+      {
+        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+      }
+
+    }
+
+    /// <summary>Client for ServerReflection</summary>
+    public partial class ServerReflectionClient : ClientBase<ServerReflectionClient>
+    {
+      /// <summary>Creates a new client for ServerReflection</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
+      public ServerReflectionClient(Channel channel) : base(channel)
+      {
+      }
+      /// <summary>Creates a new client for ServerReflection that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
+      public ServerReflectionClient(CallInvoker callInvoker) : base(callInvoker)
+      {
+      }
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      protected ServerReflectionClient() : base()
+      {
+      }
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
+      protected ServerReflectionClient(ClientBaseConfiguration configuration) : base(configuration)
+      {
+      }
+
+      /// <summary>
+      /// The reflection service is structured as a bidirectional stream, ensuring
+      /// all related requests go to a single server.
+      /// </summary>
+      /// <param name="headers">The initial metadata to send with the call. This parameter is optional.</param>
+      /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
+      /// <param name="cancellationToken">An optional token for canceling the call.</param>
+      /// <returns>The call object.</returns>
+      public virtual AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        return ServerReflectionInfo(new CallOptions(headers, deadline, cancellationToken));
+      }
+      /// <summary>
+      /// The reflection service is structured as a bidirectional stream, ensuring
+      /// all related requests go to a single server.
+      /// </summary>
+      /// <param name="options">The options for the call.</param>
+      /// <returns>The call object.</returns>
+      public virtual AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(CallOptions options)
+      {
+        return CallInvoker.AsyncDuplexStreamingCall(__Method_ServerReflectionInfo, null, options);
+      }
+      /// <summary>Creates a new instance of client from given <c>ClientBaseConfiguration</c>.</summary>
+      protected override ServerReflectionClient NewInstance(ClientBaseConfiguration configuration)
+      {
+        return new ServerReflectionClient(configuration);
+      }
+    }
+
+    /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
+    public static ServerServiceDefinition BindService(ServerReflectionBase serviceImpl)
+    {
+      return ServerServiceDefinition.CreateBuilder()
+          .AddMethod(__Method_ServerReflectionInfo, serviceImpl.ServerReflectionInfo).Build();
+    }
+
+  }
+}
+#endregion
diff --git a/src/csharp/Grpc.Reflection/ReflectionServiceImpl.cs b/src/csharp/Grpc.Reflection/ReflectionServiceImpl.cs
new file mode 100644
index 0000000000..105c4c963b
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/ReflectionServiceImpl.cs
@@ -0,0 +1,173 @@
+#region Copyright notice and license
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+using Grpc.Core.Utils;
+using Grpc.Reflection.V1Alpha;
+using Google.Protobuf.Reflection;
+
+namespace Grpc.Reflection
+{
+    /// <summary>
+    /// Implementation of server reflection service.
+    /// </summary>
+    public class ReflectionServiceImpl : Grpc.Reflection.V1Alpha.ServerReflection.ServerReflectionBase
+    {
+        readonly List<string> services;
+        readonly SymbolRegistry symbolRegistry;
+
+        /// <summary>
+        /// Creates a new instance of <c>ReflectionServiceIml</c>.
+        /// </summary>
+        public ReflectionServiceImpl(IEnumerable<string> services, SymbolRegistry symbolRegistry)
+        {
+            this.services = new List<string>(services);
+            this.symbolRegistry = symbolRegistry;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <c>ReflectionServiceIml</c>.
+        /// </summary>
+        public ReflectionServiceImpl(IEnumerable<ServiceDescriptor> serviceDescriptors)
+        {
+            this.services = new List<string>(serviceDescriptors.Select((serviceDescriptor) => serviceDescriptor.FullName));
+            this.symbolRegistry = SymbolRegistry.FromFiles(serviceDescriptors.Select((serviceDescriptor) => serviceDescriptor.File));
+        }
+
+        /// <summary>
+        /// Creates a new instance of <c>ReflectionServiceIml</c>.
+        /// </summary>
+        public ReflectionServiceImpl(params ServiceDescriptor[] serviceDescriptors) : this((IEnumerable<ServiceDescriptor>) serviceDescriptors)
+        {
+        }
+
+        public override async Task ServerReflectionInfo(IAsyncStreamReader<ServerReflectionRequest> requestStream, IServerStreamWriter<ServerReflectionResponse> responseStream, ServerCallContext context)
+        {
+            while (await requestStream.MoveNext())
+            {
+                var response = ProcessRequest(requestStream.Current);
+                await responseStream.WriteAsync(response);
+            }
+        }
+
+        ServerReflectionResponse ProcessRequest(ServerReflectionRequest request)
+        {
+            switch (request.MessageRequestCase)
+            {
+                case ServerReflectionRequest.MessageRequestOneofCase.FileByFilename:
+                    return FileByFilename(request.FileByFilename);
+                case ServerReflectionRequest.MessageRequestOneofCase.FileContainingSymbol:
+                    return FileContainingSymbol(request.FileContainingSymbol);
+                case ServerReflectionRequest.MessageRequestOneofCase.ListServices:
+                    return ListServices();
+                case ServerReflectionRequest.MessageRequestOneofCase.AllExtensionNumbersOfType:
+                case ServerReflectionRequest.MessageRequestOneofCase.FileContainingExtension:
+                default:
+                    return CreateErrorResponse(StatusCode.Unimplemented, "Request type not supported by C# reflection service.");
+            }
+        }
+
+        ServerReflectionResponse FileByFilename(string filename)
+        {
+            FileDescriptor file = symbolRegistry.FileByName(filename);
+            if (file == null)
+            {
+                return CreateErrorResponse(StatusCode.NotFound, "File not found.");
+            }
+
+            var transitiveDependencies = new HashSet<FileDescriptor>();
+            CollectTransitiveDependencies(file, transitiveDependencies);
+
+            return new ServerReflectionResponse
+            {
+                FileDescriptorResponse = new FileDescriptorResponse { FileDescriptorProto = { transitiveDependencies.Select((d) => d.SerializedData) } }
+            };
+        }
+
+        ServerReflectionResponse FileContainingSymbol(string symbol)
+        {
+            FileDescriptor file = symbolRegistry.FileContainingSymbol(symbol);
+            if (file == null)
+            {
+                return CreateErrorResponse(StatusCode.NotFound, "Symbol not found.");
+            }
+
+            var transitiveDependencies = new HashSet<FileDescriptor>();
+            CollectTransitiveDependencies(file, transitiveDependencies);
+
+            return new ServerReflectionResponse
+            {
+                FileDescriptorResponse = new FileDescriptorResponse { FileDescriptorProto = { transitiveDependencies.Select((d) => d.SerializedData) } }
+            };
+        }
+
+        ServerReflectionResponse ListServices()
+        {
+            var serviceResponses = new ListServiceResponse();
+            foreach (string serviceName in services)
+            {
+                serviceResponses.Service.Add(new ServiceResponse { Name = serviceName });
+            }
+
+            return new ServerReflectionResponse
+            {
+                ListServicesResponse = serviceResponses
+            };
+        }
+
+        ServerReflectionResponse CreateErrorResponse(StatusCode status, string message)
+        {
+            return new ServerReflectionResponse
+            {
+                ErrorResponse = new ErrorResponse { ErrorCode = (int) status, ErrorMessage = message }
+            };
+        }
+
+        void CollectTransitiveDependencies(FileDescriptor descriptor, HashSet<FileDescriptor> pool)
+        {
+            pool.Add(descriptor);
+            foreach (var dependency in descriptor.Dependencies)
+            {
+                if (pool.Add(dependency))
+                {
+                    // descriptors cannot have circular dependencies
+                    CollectTransitiveDependencies(dependency, pool);
+                }
+            }
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Reflection/Settings.StyleCop b/src/csharp/Grpc.Reflection/Settings.StyleCop
new file mode 100644
index 0000000000..2942add962
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/Settings.StyleCop
@@ -0,0 +1,10 @@
+<StyleCopSettings Version="105">
+  <SourceFileList>
+    <SourceFile>Health.cs</SourceFile>
+    <Settings>
+    <GlobalSettings>
+      <BooleanProperty Name="RulesEnabledByDefault">False</BooleanProperty>
+    </GlobalSettings>
+    </Settings>
+  </SourceFileList>
+</StyleCopSettings>
diff --git a/src/csharp/Grpc.Reflection/SymbolRegistry.cs b/src/csharp/Grpc.Reflection/SymbolRegistry.cs
new file mode 100644
index 0000000000..b7104ab2f9
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/SymbolRegistry.cs
@@ -0,0 +1,160 @@
+#region Copyright notice and license
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System.Collections.Generic;
+using Grpc.Core.Utils;
+using Google.Protobuf.Reflection;
+
+namespace Grpc.Reflection
+{
+    /// <summary>Registry of protobuf symbols</summary>
+    public class SymbolRegistry
+    {
+        private readonly Dictionary<string, FileDescriptor> filesByName;
+        private readonly Dictionary<string, FileDescriptor> filesBySymbol;
+        
+        private SymbolRegistry(Dictionary<string, FileDescriptor> filesByName, Dictionary<string, FileDescriptor> filesBySymbol)
+        {
+            this.filesByName = new Dictionary<string, FileDescriptor>(filesByName);
+            this.filesBySymbol = new Dictionary<string, FileDescriptor>(filesBySymbol);
+        }
+
+        /// <summary>
+        /// Creates a symbol registry from the specified set of file descriptors.
+        /// </summary>
+        /// <param name="fileDescriptors">The set of files to include in the registry. Must not contain null values.</param>
+        /// <returns>A symbol registry for the given files.</returns>
+        public static SymbolRegistry FromFiles(IEnumerable<FileDescriptor> fileDescriptors)
+        {
+            GrpcPreconditions.CheckNotNull(fileDescriptors);
+            var builder = new Builder();
+            foreach (var file in fileDescriptors)
+            {
+                builder.AddFile(file);
+            }
+            return builder.Build();
+        }
+
+        /// <summary>
+        /// Gets file descriptor for given file name (including package path). Returns <c>null</c> if not found.
+        /// </summary>
+        public FileDescriptor FileByName(string filename)
+        {
+            FileDescriptor file;
+            filesByName.TryGetValue(filename, out file);
+            return file;
+        }
+
+        /// <summary>
+        /// Gets file descriptor that contains definition of given symbol full name (including package path). Returns <c>null</c> if not found.
+        /// </summary>
+        public FileDescriptor FileContainingSymbol(string symbol)
+        {
+            FileDescriptor file;
+            filesBySymbol.TryGetValue(symbol, out file);
+            return file;
+        }
+
+        /// <summary>
+        /// Builder class which isn't exposed, but acts as a convenient alternative to passing round two dictionaries in recursive calls.
+        /// </summary>
+        private class Builder
+        {
+            private readonly Dictionary<string, FileDescriptor> filesByName;
+            private readonly Dictionary<string, FileDescriptor> filesBySymbol;
+            
+
+            internal Builder()
+            {
+                filesByName = new Dictionary<string, FileDescriptor>();
+                filesBySymbol = new Dictionary<string, FileDescriptor>();
+            }
+
+            internal void AddFile(FileDescriptor fileDescriptor)
+            {
+                if (filesByName.ContainsKey(fileDescriptor.Name))
+                {
+                    return;
+                }
+                filesByName.Add(fileDescriptor.Name, fileDescriptor);
+
+                foreach (var dependency in fileDescriptor.Dependencies)
+                {
+                    AddFile(dependency);
+                }
+                foreach (var enumeration in fileDescriptor.EnumTypes)
+                {
+                    AddEnum(enumeration);
+                }
+                foreach (var message in fileDescriptor.MessageTypes)
+                {
+                    AddMessage(message);
+                }
+                foreach (var service in fileDescriptor.Services)
+                {
+                    AddService(service);
+                }
+            }
+
+            private void AddEnum(EnumDescriptor enumDescriptor)
+            {
+                filesBySymbol[enumDescriptor.FullName] = enumDescriptor.File;
+            }
+
+            private void AddMessage(MessageDescriptor messageDescriptor)
+            {
+                foreach (var nestedEnum in messageDescriptor.EnumTypes)
+                {
+                    AddEnum(nestedEnum);
+                }
+                foreach (var nestedType in messageDescriptor.NestedTypes)
+                {
+                    AddMessage(nestedType);
+                }
+                filesBySymbol[messageDescriptor.FullName] = messageDescriptor.File;
+            }
+
+            private void AddService(ServiceDescriptor serviceDescriptor)
+            {
+                foreach (var method in serviceDescriptor.Methods)
+                {
+                    filesBySymbol[method.FullName] = method.File;
+                }
+                filesBySymbol[serviceDescriptor.FullName] = serviceDescriptor.File;
+            }
+
+            internal SymbolRegistry Build()
+            {
+                return new SymbolRegistry(filesByName, filesBySymbol);
+            }
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Reflection/packages.config b/src/csharp/Grpc.Reflection/packages.config
new file mode 100644
index 0000000000..5ab40b7a8c
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/packages.config
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+</packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection/project.json b/src/csharp/Grpc.Reflection/project.json
new file mode 100644
index 0000000000..2fe617cc7a
--- /dev/null
+++ b/src/csharp/Grpc.Reflection/project.json
@@ -0,0 +1,40 @@
+{
+  "version": "1.1.0-dev",
+  "title": "gRPC C# Reflection",
+  "authors": [ "Google Inc." ],
+  "copyright": "Copyright 2016, Google Inc.",
+  "packOptions": {
+    "summary": "Implementation of gRPC reflection service",
+    "description": "Provides information about services running on a gRPC C# server.",
+    "owners": [ "grpc-packages" ],
+    "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+    "projectUrl": "https://github.com/grpc/grpc",
+    "requireLicenseAcceptance": false,
+    "tags": [ "gRPC reflection" ]
+  },
+  "buildOptions": {
+    "define": [ "SIGNED" ],
+    "keyFile": "../keys/Grpc.snk",
+    "xmlDoc": true,
+    "compile": {
+      "includeFiles": [ "../Grpc.Core/Version.cs" ]
+    }
+  },
+  "dependencies": {
+    "Grpc.Core": "1.1.0-dev",
+    "Google.Protobuf": "3.0.0"
+  },
+  "frameworks": {
+    "net45": {
+      "frameworkAssemblies": {
+        "System.Runtime": "",
+        "System.IO": ""
+      }
+    },
+    "netstandard1.5": {
+      "dependencies": {
+        "NETStandard.Library": "1.6.0"
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.sln b/src/csharp/Grpc.sln
index 9be36c0caa..179e731380 100644
--- a/src/csharp/Grpc.sln
+++ b/src/csharp/Grpc.sln
@@ -36,97 +36,80 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.IntegrationTesting.Qps
 EndProject

 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.IntegrationTesting.StressClient", "Grpc.IntegrationTesting.StressClient\Grpc.IntegrationTesting.StressClient.csproj", "{ADEBA147-80AE-4710-82E9-5B7F93690266}"

 EndProject

+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Reflection", "Grpc.Reflection\Grpc.Reflection.csproj", "{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}"

+EndProject

+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Reflection.Tests", "Grpc.Reflection.Tests\Grpc.Reflection.Tests.csproj", "{B88F91D6-436D-4C78-8B99-47800FA8DE03}"

+EndProject

 Global

 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

 		Debug|Any CPU = Debug|Any CPU

 		Release|Any CPU = Release|Any CPU

-		ReleaseSigned|Any CPU = ReleaseSigned|Any CPU

 	EndGlobalSection

 	GlobalSection(ProjectConfigurationPlatforms) = postSolution

 		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|Any CPU.Build.0 = Release|Any CPU

-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|Any CPU.Build.0 = Release|Any CPU

-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

+		{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

+		{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}.Debug|Any CPU.Build.0 = Debug|Any CPU

+		{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}.Release|Any CPU.ActiveCfg = Release|Any CPU

+		{4F18CF52-B3DB-4A77-97C5-7F7F4B6C1715}.Release|Any CPU.Build.0 = Release|Any CPU

 		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|Any CPU.Build.0 = Release|Any CPU

-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Release|Any CPU.Build.0 = Release|Any CPU

-		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Release|Any CPU.Build.0 = Release|Any CPU

-		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|Any CPU.Build.0 = Release|Any CPU

-		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.Release|Any CPU.Build.0 = Release|Any CPU

-		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{AA5E328A-8835-49D7-98ED-C29F2B3049F0}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{ADEBA147-80AE-4710-82E9-5B7F93690266}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{ADEBA147-80AE-4710-82E9-5B7F93690266}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{ADEBA147-80AE-4710-82E9-5B7F93690266}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{ADEBA147-80AE-4710-82E9-5B7F93690266}.Release|Any CPU.Build.0 = Release|Any CPU

-		{ADEBA147-80AE-4710-82E9-5B7F93690266}.ReleaseSigned|Any CPU.ActiveCfg = Release|Any CPU

-		{ADEBA147-80AE-4710-82E9-5B7F93690266}.ReleaseSigned|Any CPU.Build.0 = Release|Any CPU

 		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|Any CPU.Build.0 = Release|Any CPU

-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.Release|Any CPU.Build.0 = Release|Any CPU

-		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.ReleaseSigned|Any CPU.ActiveCfg = Release|Any CPU

-		{B82B7DFE-7F7B-40EF-B3D6-064FF2B01294}.ReleaseSigned|Any CPU.Build.0 = Release|Any CPU

+		{B88F91D6-436D-4C78-8B99-47800FA8DE03}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

+		{B88F91D6-436D-4C78-8B99-47800FA8DE03}.Debug|Any CPU.Build.0 = Debug|Any CPU

+		{B88F91D6-436D-4C78-8B99-47800FA8DE03}.Release|Any CPU.ActiveCfg = Release|Any CPU

+		{B88F91D6-436D-4C78-8B99-47800FA8DE03}.Release|Any CPU.Build.0 = Release|Any CPU

 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Release|Any CPU.Build.0 = Release|Any CPU

-		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|Any CPU.Build.0 = Release|Any CPU

-		{C61154BA-DD4A-4838-8420-0162A28925E0}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{C61154BA-DD4A-4838-8420-0162A28925E0}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|Any CPU.Build.0 = Release|Any CPU

-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Release|Any CPU.Build.0 = Release|Any CPU

-		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.ReleaseSigned|Any CPU.ActiveCfg = ReleaseSigned|Any CPU

-		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.ReleaseSigned|Any CPU.Build.0 = ReleaseSigned|Any CPU

 	EndGlobalSection

 	GlobalSection(NestedProjects) = preSolution

 	EndGlobalSection

diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages_dotnetcli.bat
index c0036df13f..9e8c045a1f 100644..100755
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages_dotnetcli.bat
@@ -27,18 +27,17 @@
 @rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 @rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-@rem Builds gRPC NuGet packages
-
-@rem This way of building nuget packages is now obsolete. C# nuget packages
-@rem with CoreCLR support are now being built using the dotnet cli
-@rem in build_packages_dotnetcli.sh
-
 @rem Current package versions
 set VERSION=1.1.0-dev
 set PROTOBUF_VERSION=3.0.0
 
 @rem Adjust the location of nuget.exe
 set NUGET=C:\nuget\nuget.exe
+set DOTNET=C:\dotnet\dotnet.exe
+
+set -ex
+
+mkdir -p ..\..\artifacts\
 
 @rem Collect the artifacts built by the previous build step if running on Jenkins
 @rem TODO(jtattermusch): is there a better way to do this?
@@ -57,32 +56,22 @@ xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=linux\artifacts\* pr
 xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x86\
 xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x64\
 
-@rem Fetch all dependencies
-%NUGET% restore ..\..\vsprojects\grpc_csharp_ext.sln || goto :error
-
-setlocal
-
-@call "%VS120COMNTOOLS%\..\..\vc\vcvarsall.bat" x86
-
-@rem We won't use the native libraries from this step, but without this Grpc.sln will fail.
-msbuild ..\..\vsprojects\grpc_csharp_ext.sln /p:Configuration=Release /p:PlatformToolset=v120 || goto :error
-
-msbuild Grpc.sln /p:Configuration=ReleaseSigned || goto :error
+%DOTNET% restore . || goto :error
 
-endlocal
+%DOTNET% pack --configuration Release Grpc.Core\project.json --output ..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release Grpc.Auth\project.json --output ..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release Grpc.HealthCheck\project.json --output ..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release Grpc.Reflection\project.json --output ..\..\artifacts || goto :error
 
-%NUGET% pack Grpc.Auth\Grpc.Auth.nuspec -Symbols -Version %VERSION% || goto :error
-%NUGET% pack Grpc.Core\Grpc.Core.nuspec -Symbols -Version %VERSION% || goto :error
-%NUGET% pack Grpc.HealthCheck\Grpc.HealthCheck.nuspec -Symbols -Version %VERSION% -Properties ProtobufVersion=%PROTOBUF_VERSION% || goto :error
-%NUGET% pack Grpc.nuspec -Version %VERSION% || goto :error
-%NUGET% pack Grpc.Tools.nuspec -Version %VERSION% || goto :error
+%NUGET% pack Grpc.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts || goto :error
+%NUGET% pack Grpc.Tools.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts
 
 @rem copy resulting nuget packages to artifacts directory
-xcopy /Y /I *.nupkg ..\..\artifacts\
+xcopy /Y /I *.nupkg ..\..\artifacts\ || goto :error
 
 @rem create a zipfile with the artifacts as well
-powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets_obsolete.zip');"
-xcopy /Y /I csharp_nugets_obsolete.zip ..\..\artifacts\
+powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets_windows_dotnetcli.zip');"
+xcopy /Y /I csharp_nugets_windows_dotnetcli.zip ..\..\artifacts\ || goto :error
 
 goto :EOF
 
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
index 3c127f320b..52cf2f9ddc 100755
--- a/src/csharp/build_packages_dotnetcli.sh
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -63,6 +63,7 @@ dotnet restore .
 dotnet pack --configuration Release Grpc.Core/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.Auth/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.HealthCheck/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.Reflection/project.json --output ../../artifacts
 
 nuget pack Grpc.nuspec -Version "1.1.0-dev" -OutputDirectory ../../artifacts
 nuget pack Grpc.Tools.nuspec -Version "1.1.0-dev" -OutputDirectory ../../artifacts
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 9a5d7869d3..946f5872c0 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -37,7 +37,7 @@
 #include <grpc/support/port_platform.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/thd.h>
 #include <grpc/grpc.h>
@@ -59,9 +59,9 @@
 #endif
 
 grpc_byte_buffer *string_to_byte_buffer(const char *buffer, size_t len) {
-  gpr_slice slice = gpr_slice_from_copied_buffer(buffer, len);
+  grpc_slice slice = grpc_slice_from_copied_buffer(buffer, len);
   grpc_byte_buffer *bb = grpc_raw_byte_buffer_create(&slice, 1);
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   return bb;
 }
 
@@ -282,18 +282,18 @@ GPR_EXPORT intptr_t GPR_CALLTYPE grpcsharp_batch_context_recv_message_length(
 GPR_EXPORT void GPR_CALLTYPE grpcsharp_batch_context_recv_message_to_buffer(
     const grpcsharp_batch_context *ctx, char *buffer, size_t buffer_len) {
   grpc_byte_buffer_reader reader;
-  gpr_slice slice;
+  grpc_slice slice;
   size_t offset = 0;
 
   GPR_ASSERT(grpc_byte_buffer_reader_init(&reader, ctx->recv_message));
 
   while (grpc_byte_buffer_reader_next(&reader, &slice)) {
-    size_t len = GPR_SLICE_LENGTH(slice);
+    size_t len = GRPC_SLICE_LENGTH(slice);
     GPR_ASSERT(offset + len <= buffer_len);
-    memcpy(buffer + offset, GPR_SLICE_START_PTR(slice),
-           GPR_SLICE_LENGTH(slice));
+    memcpy(buffer + offset, GRPC_SLICE_START_PTR(slice),
+           GRPC_SLICE_LENGTH(slice));
     offset += len;
-    gpr_slice_unref(slice);
+    grpc_slice_unref(slice);
   }
 
   grpc_byte_buffer_reader_destroy(&reader);
@@ -521,8 +521,8 @@ GPR_EXPORT void GPR_CALLTYPE grpcsharp_call_destroy(grpc_call *call) {
 
 GPR_EXPORT grpc_call_error GPR_CALLTYPE
 grpcsharp_call_start_unary(grpc_call *call, grpcsharp_batch_context *ctx,
-                           const char *send_buffer, size_t send_buffer_len,
-                           grpc_metadata_array *initial_metadata, uint32_t write_flags) {
+                           const char *send_buffer, size_t send_buffer_len, uint32_t write_flags,
+                           grpc_metadata_array *initial_metadata, uint32_t initial_metadata_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[6];
   memset(ops, 0, sizeof(ops));
@@ -532,7 +532,7 @@ grpcsharp_call_start_unary(grpc_call *call, grpcsharp_batch_context *ctx,
   ops[0].data.send_initial_metadata.count = ctx->send_initial_metadata.count;
   ops[0].data.send_initial_metadata.metadata =
       ctx->send_initial_metadata.metadata;
-  ops[0].flags = 0;
+  ops[0].flags = initial_metadata_flags;
   ops[0].reserved = NULL;
 
   ops[1].op = GRPC_OP_SEND_MESSAGE;
@@ -575,7 +575,8 @@ grpcsharp_call_start_unary(grpc_call *call, grpcsharp_batch_context *ctx,
 GPR_EXPORT grpc_call_error GPR_CALLTYPE
 grpcsharp_call_start_client_streaming(grpc_call *call,
                                       grpcsharp_batch_context *ctx,
-                                      grpc_metadata_array *initial_metadata) {
+                                      grpc_metadata_array *initial_metadata,
+                                      uint32_t initial_metadata_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[4];
   memset(ops, 0, sizeof(ops));
@@ -585,7 +586,7 @@ grpcsharp_call_start_client_streaming(grpc_call *call,
   ops[0].data.send_initial_metadata.count = ctx->send_initial_metadata.count;
   ops[0].data.send_initial_metadata.metadata =
       ctx->send_initial_metadata.metadata;
-  ops[0].flags = 0;
+  ops[0].flags = initial_metadata_flags;
   ops[0].reserved = NULL;
 
   ops[1].op = GRPC_OP_RECV_INITIAL_METADATA;
@@ -617,7 +618,8 @@ grpcsharp_call_start_client_streaming(grpc_call *call,
 
 GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_start_server_streaming(
     grpc_call *call, grpcsharp_batch_context *ctx, const char *send_buffer,
-    size_t send_buffer_len, grpc_metadata_array *initial_metadata, uint32_t write_flags) {
+    size_t send_buffer_len, uint32_t write_flags,
+    grpc_metadata_array *initial_metadata, uint32_t initial_metadata_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[4];
   memset(ops, 0, sizeof(ops));
@@ -627,7 +629,7 @@ GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_start_server_streaming(
   ops[0].data.send_initial_metadata.count = ctx->send_initial_metadata.count;
   ops[0].data.send_initial_metadata.metadata =
       ctx->send_initial_metadata.metadata;
-  ops[0].flags = 0;
+  ops[0].flags = initial_metadata_flags;
   ops[0].reserved = NULL;
 
   ops[1].op = GRPC_OP_SEND_MESSAGE;
@@ -660,7 +662,8 @@ GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_start_server_streaming(
 GPR_EXPORT grpc_call_error GPR_CALLTYPE
 grpcsharp_call_start_duplex_streaming(grpc_call *call,
                                       grpcsharp_batch_context *ctx,
-                                      grpc_metadata_array *initial_metadata) {
+                                      grpc_metadata_array *initial_metadata,
+                                      uint32_t initial_metadata_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[2];
   memset(ops, 0, sizeof(ops));
@@ -670,7 +673,7 @@ grpcsharp_call_start_duplex_streaming(grpc_call *call,
   ops[0].data.send_initial_metadata.count = ctx->send_initial_metadata.count;
   ops[0].data.send_initial_metadata.metadata =
       ctx->send_initial_metadata.metadata;
-  ops[0].flags = 0;
+  ops[0].flags = initial_metadata_flags;
   ops[0].reserved = NULL;
 
   ops[1].op = GRPC_OP_RECV_STATUS_ON_CLIENT;
@@ -991,7 +994,11 @@ GPR_EXPORT void GPR_CALLTYPE grpcsharp_metadata_credentials_notify_from_plugin(
     grpc_credentials_plugin_metadata_cb cb,
     void *user_data, grpc_metadata_array *metadata,
   grpc_status_code status, const char *error_details) {
-  cb(user_data, metadata->metadata, metadata->count, status, error_details);
+  if (metadata) {
+    cb(user_data, metadata->metadata, metadata->count, status, error_details);
+  } else {
+    cb(user_data, NULL, 0, status, error_details);
+  }
 }
 
 typedef void(GPR_CALLTYPE *grpcsharp_metadata_interceptor_func)(
diff --git a/src/csharp/generate_proto_csharp.sh b/src/csharp/generate_proto_csharp.sh
index 79488e02a5..ea5d678cba 100755
--- a/src/csharp/generate_proto_csharp.sh
+++ b/src/csharp/generate_proto_csharp.sh
@@ -36,13 +36,20 @@ PROTOC=bins/opt/protobuf/protoc
 PLUGIN=protoc-gen-grpc=bins/opt/grpc_csharp_plugin
 EXAMPLES_DIR=src/csharp/Grpc.Examples
 HEALTHCHECK_DIR=src/csharp/Grpc.HealthCheck
+REFLECTION_DIR=src/csharp/Grpc.Reflection
 TESTING_DIR=src/csharp/Grpc.IntegrationTesting
 
 $PROTOC --plugin=$PLUGIN --csharp_out=$EXAMPLES_DIR --grpc_out=$EXAMPLES_DIR \
-    -I src/proto/math src/proto/math/math.proto
+    -I src/proto src/proto/math/math.proto
 
 $PROTOC --plugin=$PLUGIN --csharp_out=$HEALTHCHECK_DIR --grpc_out=$HEALTHCHECK_DIR \
-    -I src/proto/grpc/health/v1 src/proto/grpc/health/v1/health.proto
+    -I src/proto src/proto/grpc/health/v1/health.proto
+    
+$PROTOC --plugin=$PLUGIN --csharp_out=$REFLECTION_DIR --grpc_out=$REFLECTION_DIR \
+    -I src/proto src/proto/grpc/reflection/v1alpha/reflection.proto
 
+# TODO(jtattermusch): following .proto files are a bit broken and import paths
+# don't match the package names. Setting -I to the correct value src/proto
+# breaks the code generation.
 $PROTOC --plugin=$PLUGIN --csharp_out=$TESTING_DIR --grpc_out=$TESTING_DIR \
     -I . src/proto/grpc/testing/{control,empty,messages,metrics,payloads,services,stats,test}.proto 
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index 7e7aee1093..4ce6769eee 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -48,5 +48,9 @@
     "Grpc.IntegrationTesting.MetadataCredentialsTest",
     "Grpc.IntegrationTesting.RunnerClientServerTest",
     "Grpc.IntegrationTesting.SslCredentialsTest"
+  ],
+  "Grpc.Reflection.Tests": [
+    "Grpc.Reflection.Tests.ReflectionClientServerTest",
+    "Grpc.Reflection.Tests.SymbolRegistryTest"
   ]
 }
\ No newline at end of file
diff --git a/src/node/ext/byte_buffer.cc b/src/node/ext/byte_buffer.cc
index a3f678f32c..fc339fc462 100644
--- a/src/node/ext/byte_buffer.cc
+++ b/src/node/ext/byte_buffer.cc
@@ -37,15 +37,15 @@
 #include <nan.h>
 #include "grpc/grpc.h"
 #include "grpc/byte_buffer_reader.h"
-#include "grpc/support/slice.h"
+#include "grpc/slice.h"
 
 #include "byte_buffer.h"
 
 namespace grpc {
 namespace node {
 
+using Nan::MaybeLocal;
 
-using v8::Context;
 using v8::Function;
 using v8::Local;
 using v8::Object;
@@ -56,10 +56,10 @@ grpc_byte_buffer *BufferToByteBuffer(Local<Value> buffer) {
   Nan::HandleScope scope;
   int length = ::node::Buffer::Length(buffer);
   char *data = ::node::Buffer::Data(buffer);
-  gpr_slice slice = gpr_slice_malloc(length);
-  memcpy(GPR_SLICE_START_PTR(slice), data, length);
+  grpc_slice slice = grpc_slice_malloc(length);
+  memcpy(GRPC_SLICE_START_PTR(slice), data, length);
   grpc_byte_buffer *byte_buffer(grpc_raw_byte_buffer_create(&slice, 1));
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   return byte_buffer;
 }
 
@@ -77,11 +77,11 @@ Local<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
     Nan::ThrowError("Error initializing byte buffer reader.");
     return scope.Escape(Nan::Undefined());
   }
-  gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
-  size_t length = GPR_SLICE_LENGTH(slice);
+  grpc_slice slice = grpc_byte_buffer_reader_readall(&reader);
+  size_t length = GRPC_SLICE_LENGTH(slice);
   char *result = new char[length];
-  memcpy(result, GPR_SLICE_START_PTR(slice), length);
-  gpr_slice_unref(slice);
+  memcpy(result, GRPC_SLICE_START_PTR(slice), length);
+  grpc_slice_unref(slice);
   return scope.Escape(MakeFastBuffer(
       Nan::NewBuffer(result, length, delete_buffer, NULL).ToLocalChecked()));
 }
@@ -89,15 +89,19 @@ Local<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
 Local<Value> MakeFastBuffer(Local<Value> slowBuffer) {
   Nan::EscapableHandleScope scope;
   Local<Object> globalObj = Nan::GetCurrentContext()->Global();
+  MaybeLocal<Value> constructorValue = Nan::Get(
+      globalObj, Nan::New("Buffer").ToLocalChecked());
   Local<Function> bufferConstructor = Local<Function>::Cast(
-      globalObj->Get(Nan::New("Buffer").ToLocalChecked()));
-  Local<Value> consArgs[3] = {
+      constructorValue.ToLocalChecked());
+  const int argc = 3;
+  Local<Value> consArgs[argc] = {
     slowBuffer,
     Nan::New<Number>(::node::Buffer::Length(slowBuffer)),
     Nan::New<Number>(0)
   };
-  Local<Object> fastBuffer = bufferConstructor->NewInstance(3, consArgs);
-  return scope.Escape(fastBuffer);
+  MaybeLocal<Object> fastBuffer = Nan::NewInstance(bufferConstructor,
+                                                   argc, consArgs);
+  return scope.Escape(fastBuffer.ToLocalChecked());
 }
 }  // namespace node
 }  // namespace grpc
diff --git a/src/node/ext/call.cc b/src/node/ext/call.cc
index b48a7bd698..191e763e0e 100644
--- a/src/node/ext/call.cc
+++ b/src/node/ext/call.cc
@@ -669,16 +669,16 @@ NAN_METHOD(Call::New) {
         return Nan::ThrowTypeError("Call's fourth argument must be a string");
       }
       call = new Call(wrapped_call);
-      info.This()->SetHiddenValue(Nan::New("channel_").ToLocalChecked(),
-                                  channel_object);
+      Nan::Set(info.This(), Nan::New("channel_").ToLocalChecked(),
+               channel_object);
     }
     call->Wrap(info.This());
     info.GetReturnValue().Set(info.This());
   } else {
     const int argc = 4;
     Local<Value> argv[argc] = {info[0], info[1], info[2], info[3]};
-    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
-        argc, argv);
+    MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+        constructor->GetFunction(), argc, argv);
     if (maybe_instance.IsEmpty()) {
       // There's probably a pending exception
       return;
diff --git a/src/node/ext/channel.cc b/src/node/ext/channel.cc
index c4028170e7..5bc58b9b32 100644
--- a/src/node/ext/channel.cc
+++ b/src/node/ext/channel.cc
@@ -208,8 +208,8 @@ NAN_METHOD(Channel::New) {
   } else {
     const int argc = 3;
     Local<Value> argv[argc] = {info[0], info[1], info[2]};
-    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
-        argc, argv);
+    MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+        constructor->GetFunction(), argc, argv);
     if (maybe_instance.IsEmpty()) {
       // There's probably a pending exception
       return;
diff --git a/src/node/ext/server.cc b/src/node/ext/server.cc
index 29f31ff15e..70d5b96f39 100644
--- a/src/node/ext/server.cc
+++ b/src/node/ext/server.cc
@@ -222,7 +222,7 @@ NAN_METHOD(Server::New) {
     const int argc = 1;
     Local<Value> argv[argc] = {info[0]};
     MaybeLocal<Object> maybe_instance =
-        constructor->GetFunction()->NewInstance(argc, argv);
+        Nan::NewInstance(constructor->GetFunction(), argc, argv);
     if (maybe_instance.IsEmpty()) {
       // There's probably a pending exception
       return;
diff --git a/src/node/performance/worker_service_impl.js b/src/node/performance/worker_service_impl.js
index 3f317f6429..38888a7219 100644
--- a/src/node/performance/worker_service_impl.js
+++ b/src/node/performance/worker_service_impl.js
@@ -55,9 +55,8 @@ module.exports = function WorkerServiceImpl(benchmark_impl, server) {
   }
 
   this.quitWorker = function quitWorker(call, callback) {
-    server.tryShutdown(function() {
-      callback(null, {});
-    });
+    callback(null, {});
+    server.tryShutdown(function() {});
   };
 
   this.runClient = function runClient(call) {
diff --git a/src/node/src/client.js b/src/node/src/client.js
index 9c1562e8b8..134ef239c2 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -99,7 +99,18 @@ function ClientWritableStream(call, serialize) {
 function _write(chunk, encoding, callback) {
   /* jshint validthis: true */
   var batch = {};
-  var message = this.serialize(chunk);
+  var message;
+  try {
+    message = this.serialize(chunk);
+  } catch (e) {
+    /* Sending this error to the server and emitting it immediately on the
+       client may put the call in a slightly weird state on the client side,
+       but passing an object that causes a serialization failure is a misuse
+       of the API anyway, so that's OK. The primary purpose here is to give the
+       programmer a useful error and to stop the stream properly */
+    this.call.cancelWithStatus(grpc.status.INTERNAL, "Serialization failure");
+    callback(e);
+  }
   if (_.isFinite(encoding)) {
     /* Attach the encoding if it is a finite number. This is the closest we
      * can get to checking that it is valid flags */
@@ -184,14 +195,15 @@ function _emitStatusIfDone() {
     } else {
       status = this.received_status;
     }
-    this.emit('status', status);
-    if (status.code !== grpc.status.OK) {
+    if (status.code === grpc.status.OK) {
+      this.push(null);
+    } else {
       var error = new Error(status.details);
       error.code = status.code;
       error.metadata = status.metadata;
       this.emit('error', error);
-      return;
     }
+    this.emit('status', status);
   }
 }
 
@@ -224,9 +236,11 @@ function _read(size) {
     } catch (e) {
       self._readsDone({code: grpc.status.INTERNAL,
                        details: 'Failed to parse server response'});
+      return;
     }
     if (data === null) {
       self._readsDone();
+      return;
     }
     if (self.push(deserialized) && data !== null) {
       var read_batch = {};
@@ -396,6 +410,8 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
       var status = response.status;
       var error;
       var deserialized;
+      emitter.emit('metadata', Metadata._fromCoreRepresentation(
+          response.metadata));
       if (status.code === grpc.status.OK) {
         if (err) {
           // Got a batch error, but OK status. Something went wrong
@@ -423,8 +439,6 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
         args.callback(null, deserialized);
       }
       emitter.emit('status', status);
-      emitter.emit('metadata', Metadata._fromCoreRepresentation(
-          response.metadata));
     });
     return emitter;
   }
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 22159dd39f..98eabf5c0b 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -141,8 +141,14 @@ exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
     binaryAsBase64 = options.binaryAsBase64;
     longsAsStrings = options.longsAsStrings;
   }
-  return _.object(_.map(service.children, function(method) {
-    return [_.camelCase(method.name), {
+  /* This slightly awkward construction is used to make sure we only use
+     lodash@3.10.1-compatible functions. A previous version used
+     _.fromPairs, which would be cleaner, but was introduced in lodash
+     version 4 */
+  return _.zipObject(_.map(service.children, function(method) {
+    return _.camelCase(method.name);
+  }), _.map(service.children, function(method) {
+    return {
       path: prefix + method.name,
       requestStream: method.requestStream,
       responseStream: method.responseStream,
@@ -150,11 +156,11 @@ exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
       responseType: method.resolvedResponseType,
       requestSerialize: serializeCls(method.resolvedRequestType.build()),
       requestDeserialize: deserializeCls(method.resolvedRequestType.build(),
-                                     binaryAsBase64, longsAsStrings),
+                                         binaryAsBase64, longsAsStrings),
       responseSerialize: serializeCls(method.resolvedResponseType.build()),
       responseDeserialize: deserializeCls(method.resolvedResponseType.build(),
-                                     binaryAsBase64, longsAsStrings)
-    }];
+                                          binaryAsBase64, longsAsStrings)
+    };
   }));
 };
 
diff --git a/src/node/src/server.js b/src/node/src/server.js
index b3b414969a..da9c6b2d7f 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -127,7 +127,14 @@ function sendUnaryResponse(call, value, serialize, metadata, flags) {
         (new Metadata())._getCoreRepresentation();
     call.metadataSent = true;
   }
-  var message = serialize(value);
+  var message;
+  try {
+    message = serialize(value);
+  } catch (e) {
+    e.code = grpc.status.INTERNAL;
+    handleError(e);
+    return;
+  }
   message.grpcWriteFlags = flags;
   end_batch[grpc.opType.SEND_MESSAGE] = message;
   end_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = status;
@@ -278,7 +285,14 @@ function _write(chunk, encoding, callback) {
         (new Metadata())._getCoreRepresentation();
     this.call.metadataSent = true;
   }
-  var message = this.serialize(chunk);
+  var message;
+  try {
+    message = this.serialize(chunk);
+  } catch (e) {
+    e.code = grpc.status.INTERNAL;
+    callback(e);
+    return;
+  }
   if (_.isFinite(encoding)) {
     /* Attach the encoding if it is a finite number. This is the closest we
      * can get to checking that it is valid flags */
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index d8b36dc55c..2a42dd5db5 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -179,8 +179,8 @@ describe('Server.prototype.addProtoService', function() {
       call.on('data', function(value) {
         assert.fail('No messages expected');
       });
-      call.on('status', function(status) {
-        assert.strictEqual(status.code, grpc.status.UNIMPLEMENTED);
+      call.on('error', function(err) {
+        assert.strictEqual(err.code, grpc.status.UNIMPLEMENTED);
         done();
       });
     });
@@ -189,8 +189,8 @@ describe('Server.prototype.addProtoService', function() {
       call.on('data', function(value) {
         assert.fail('No messages expected');
       });
-      call.on('status', function(status) {
-        assert.strictEqual(status.code, grpc.status.UNIMPLEMENTED);
+      call.on('error', function(err) {
+        assert.strictEqual(err.code, grpc.status.UNIMPLEMENTED);
         done();
       });
       call.end();
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index 0c3c3216ab..bcc2bb6126 100644
--- a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler-gRPCPlugin'
-  v = '1.0.0'
+  v = '1.0.2'
   s.version  = v
   s.summary  = 'The gRPC ProtoC plugin generates Objective-C files from .proto services.'
   s.description = <<-DESC
@@ -84,7 +84,10 @@ Pod::Spec.new do |s|
   repo = 'grpc/grpc'
   file = "grpc_objective_c_plugin-#{v}-macos-x86_64.zip"
   s.source = {
-    :http => "https://github.com/#{repo}/releases/download/v#{v}/#{file}",
+    # TODO(mxyan): Change back to "https://github.com/#{repo}/releases/download/v#{v}/#{file}" for
+    # next release
+    # :http => "https://github.com/#{repo}/releases/download/v#{v}/#{file}",
+    :http => "https://github.com/#{repo}/releases/download/objective-c-v#{v}/#{file}",
     # TODO(jcanizales): Add sha1 or sha256
     # :sha1 => '??',
   }
@@ -95,7 +98,7 @@ Pod::Spec.new do |s|
   s.preserve_paths = plugin
 
   # Restrict the protoc version to the one supported by this plugin.
-  s.dependency '!ProtoCompiler', '3.0.0'
+  s.dependency '!ProtoCompiler', '3.0.2'
   # For the Protobuf dependency not to complain:
   s.ios.deployment_target = '7.1'
   s.osx.deployment_target = '10.9'
diff --git a/src/objective-c/!ProtoCompiler.podspec b/src/objective-c/!ProtoCompiler.podspec
index 5018dedc06..b55f6c93c6 100644
--- a/src/objective-c/!ProtoCompiler.podspec
+++ b/src/objective-c/!ProtoCompiler.podspec
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler'
-  v = '3.0.0'
+  v = '3.0.2'
   s.version  = v
   s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
   s.description = <<-DESC
diff --git a/src/objective-c/BoringSSL.podspec b/src/objective-c/BoringSSL.podspec
index e14f39b898..47b5b1a2e7 100644
--- a/src/objective-c/BoringSSL.podspec
+++ b/src/objective-c/BoringSSL.podspec
@@ -31,7 +31,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'BoringSSL'
-  version = '6.0'
+  version = '7.0'
   s.version  = version
   s.summary  = 'BoringSSL is a fork of OpenSSL that is designed to meet Google’s needs.'
   # Adapted from the homepage:
@@ -70,7 +70,7 @@ Pod::Spec.new do |s|
   s.source = {
     :git => 'https://boringssl.googlesource.com/boringssl',
     :tag => "version_for_cocoapods_#{version}",
-    # :commit => '4ac2dc4c0d48ca45da4f66c40e60d6b425fa94a3',
+    # :commit => '4fec04b48406111cb88fdd8d196253adc54f7a31',
   }
 
   name = 'openssl'
@@ -388,42 +388,42 @@ Pod::Spec.new do |s|
           0x28340c19,
           0x283480ac,
           0x283500ea,
-          0x2c322843,
-          0x2c32a851,
-          0x2c332863,
-          0x2c33a875,
-          0x2c342889,
-          0x2c34a89b,
-          0x2c3528b6,
-          0x2c35a8c8,
-          0x2c3628db,
+          0x2c322910,
+          0x2c32a91e,
+          0x2c332930,
+          0x2c33a942,
+          0x2c342956,
+          0x2c34a968,
+          0x2c352983,
+          0x2c35a995,
+          0x2c3629a8,
           0x2c36832d,
-          0x2c3728e8,
-          0x2c37a8fa,
-          0x2c38290d,
-          0x2c38a924,
-          0x2c392932,
-          0x2c39a942,
-          0x2c3a2954,
-          0x2c3aa968,
-          0x2c3b2979,
-          0x2c3ba998,
-          0x2c3c29ac,
-          0x2c3ca9c2,
-          0x2c3d29db,
-          0x2c3da9f8,
-          0x2c3e2a09,
-          0x2c3eaa17,
-          0x2c3f2a2f,
-          0x2c3faa47,
-          0x2c402a54,
+          0x2c3729b5,
+          0x2c37a9c7,
+          0x2c3829da,
+          0x2c38a9f1,
+          0x2c3929ff,
+          0x2c39aa0f,
+          0x2c3a2a21,
+          0x2c3aaa35,
+          0x2c3b2a46,
+          0x2c3baa65,
+          0x2c3c2a79,
+          0x2c3caa8f,
+          0x2c3d2aa8,
+          0x2c3daac5,
+          0x2c3e2ad6,
+          0x2c3eaae4,
+          0x2c3f2afc,
+          0x2c3fab14,
+          0x2c402b21,
           0x2c4090e7,
-          0x2c412a65,
-          0x2c41aa78,
+          0x2c412b32,
+          0x2c41ab45,
           0x2c4210c0,
-          0x2c42aa89,
+          0x2c42ab56,
           0x2c430720,
-          0x2c43a98a,
+          0x2c43aa57,
           0x30320000,
           0x30328015,
           0x3033001f,
@@ -576,174 +576,183 @@ Pod::Spec.new do |s|
           0x403b9861,
           0x403c0064,
           0x403c8083,
-          0x403d1890,
-          0x403d98a6,
-          0x403e18b5,
-          0x403e98c8,
-          0x403f18e2,
-          0x403f98f0,
-          0x40401905,
-          0x40409919,
-          0x40411936,
-          0x40419951,
-          0x4042196a,
-          0x4042997d,
-          0x40431991,
-          0x404399a9,
-          0x404419c0,
+          0x403d18aa,
+          0x403d98c0,
+          0x403e18cf,
+          0x403e98e2,
+          0x403f18fc,
+          0x403f990a,
+          0x4040191f,
+          0x40409933,
+          0x40411950,
+          0x4041996b,
+          0x40421984,
+          0x40429997,
+          0x404319ab,
+          0x404399c3,
+          0x404419da,
           0x404480ac,
-          0x404519d5,
-          0x404599e7,
-          0x40461a0b,
-          0x40469a2b,
-          0x40471a39,
-          0x40479a60,
-          0x40481a89,
-          0x40489aa2,
-          0x40491ab9,
-          0x40499ad3,
-          0x404a1aea,
-          0x404a9b08,
-          0x404b1b20,
-          0x404b9b37,
-          0x404c1b4d,
-          0x404c9b5f,
-          0x404d1b80,
-          0x404d9ba2,
-          0x404e1bb6,
-          0x404e9bc3,
-          0x404f1bf0,
-          0x404f9c19,
-          0x40501c43,
-          0x40509c57,
-          0x40511c72,
-          0x40519c82,
-          0x40521c99,
-          0x40529cbd,
-          0x40531cd5,
-          0x40539ce8,
-          0x40541cfd,
-          0x40549d20,
-          0x40551d2e,
-          0x40559d4b,
-          0x40561d58,
-          0x40569d71,
-          0x40571d89,
-          0x40579d9c,
-          0x40581db1,
-          0x40589dc3,
-          0x40591df2,
-          0x40599e0b,
-          0x405a1e1f,
-          0x405a9e2f,
-          0x405b1e47,
-          0x405b9e58,
-          0x405c1e6b,
-          0x405c9e7c,
-          0x405d1e89,
-          0x405d9ea0,
-          0x405e1ec0,
+          0x404519ef,
+          0x40459a01,
+          0x40461a25,
+          0x40469a45,
+          0x40471a53,
+          0x40479a7a,
+          0x40481ab7,
+          0x40489ad0,
+          0x40491ae7,
+          0x40499b01,
+          0x404a1b18,
+          0x404a9b36,
+          0x404b1b4e,
+          0x404b9b65,
+          0x404c1b7b,
+          0x404c9b8d,
+          0x404d1bae,
+          0x404d9bd0,
+          0x404e1be4,
+          0x404e9bf1,
+          0x404f1c1e,
+          0x404f9c47,
+          0x40501c71,
+          0x40509c85,
+          0x40511ca0,
+          0x40519cb0,
+          0x40521cc7,
+          0x40529ceb,
+          0x40531d03,
+          0x40539d16,
+          0x40541d2b,
+          0x40549d4e,
+          0x40551d5c,
+          0x40559d79,
+          0x40561d86,
+          0x40569d9f,
+          0x40571db7,
+          0x40579dca,
+          0x40581ddf,
+          0x40589e06,
+          0x40591e35,
+          0x40599e62,
+          0x405a1e76,
+          0x405a9e86,
+          0x405b1e9e,
+          0x405b9eaf,
+          0x405c1ec2,
+          0x405c9ee3,
+          0x405d1ef0,
+          0x405d9f07,
+          0x405e1f27,
           0x405e8a95,
-          0x405f1ee1,
-          0x405f9eee,
-          0x40601efc,
-          0x40609f1e,
-          0x40611f46,
-          0x40619f5b,
-          0x40621f72,
-          0x40629f83,
-          0x40631f94,
-          0x40639fa9,
-          0x40641fc0,
-          0x40649fd1,
-          0x40651fec,
-          0x4065a003,
-          0x4066201b,
-          0x4066a045,
-          0x40672070,
-          0x4067a091,
-          0x406820a4,
-          0x4068a0c5,
-          0x406920f7,
-          0x4069a125,
-          0x406a2146,
-          0x406aa166,
-          0x406b22ee,
-          0x406ba311,
-          0x406c2327,
-          0x406ca553,
-          0x406d2582,
-          0x406da5aa,
-          0x406e25c3,
-          0x406ea5db,
-          0x406f25fa,
-          0x406fa60f,
-          0x40702622,
-          0x4070a63f,
+          0x405f1f48,
+          0x405f9f55,
+          0x40601f63,
+          0x40609f85,
+          0x40611fad,
+          0x40619fc2,
+          0x40621fd9,
+          0x40629fea,
+          0x40631ffb,
+          0x4063a010,
+          0x40642027,
+          0x4064a053,
+          0x4065206e,
+          0x4065a085,
+          0x4066209d,
+          0x4066a0c7,
+          0x406720f2,
+          0x4067a113,
+          0x40682126,
+          0x4068a147,
+          0x40692179,
+          0x4069a1a7,
+          0x406a21c8,
+          0x406aa1e8,
+          0x406b2370,
+          0x406ba393,
+          0x406c23a9,
+          0x406ca60b,
+          0x406d263a,
+          0x406da662,
+          0x406e2690,
+          0x406ea6a8,
+          0x406f26c7,
+          0x406fa6dc,
+          0x407026ef,
+          0x4070a70c,
           0x40710800,
-          0x4071a651,
-          0x40722664,
-          0x4072a67d,
-          0x40732695,
+          0x4071a71e,
+          0x40722731,
+          0x4072a74a,
+          0x40732762,
           0x4073936d,
-          0x407426a9,
-          0x4074a6c3,
-          0x407526d4,
-          0x4075a6e8,
-          0x407626f6,
+          0x40742776,
+          0x4074a790,
+          0x407527a1,
+          0x4075a7b5,
+          0x407627c3,
           0x407691aa,
-          0x4077271b,
-          0x4077a73d,
-          0x40782758,
-          0x4078a791,
-          0x407927a8,
-          0x4079a7be,
-          0x407a27ca,
-          0x407aa7dd,
-          0x407b27f2,
-          0x407ba804,
-          0x407c2819,
-          0x407ca822,
-          0x407d20e0,
-          0x407d9c29,
-          0x407e276d,
-          0x407e9dd3,
-          0x407f1a4d,
-          0x407f986d,
-          0x40801c00,
-          0x40809a75,
-          0x40811cab,
-          0x40819bda,
-          0x41f42219,
-          0x41f922ab,
-          0x41fe219e,
-          0x41fea37a,
-          0x41ff246b,
-          0x42032232,
-          0x42082254,
-          0x4208a290,
-          0x42092182,
-          0x4209a2ca,
-          0x420a21d9,
-          0x420aa1b9,
-          0x420b21f9,
-          0x420ba272,
-          0x420c2487,
-          0x420ca347,
-          0x420d2361,
-          0x420da398,
-          0x421223b2,
-          0x4217244e,
-          0x4217a3f4,
-          0x421c2416,
-          0x421f23d1,
-          0x4221249e,
-          0x42262431,
-          0x422b2537,
-          0x422ba500,
-          0x422c251f,
-          0x422ca4da,
-          0x422d24b9,
+          0x407727e8,
+          0x4077a80a,
+          0x40782825,
+          0x4078a85e,
+          0x40792875,
+          0x4079a88b,
+          0x407a2897,
+          0x407aa8aa,
+          0x407b28bf,
+          0x407ba8d1,
+          0x407c28e6,
+          0x407ca8ef,
+          0x407d2162,
+          0x407d9c57,
+          0x407e283a,
+          0x407e9e16,
+          0x407f1a67,
+          0x407f9887,
+          0x40801c2e,
+          0x40809a8f,
+          0x40811cd9,
+          0x40819c08,
+          0x4082267b,
+          0x4082986d,
+          0x40831df1,
+          0x4083a038,
+          0x40841aa3,
+          0x40849e4e,
+          0x40851ed3,
+          0x41f4229b,
+          0x41f9232d,
+          0x41fe2220,
+          0x41fea3fc,
+          0x41ff24ed,
+          0x420322b4,
+          0x420822d6,
+          0x4208a312,
+          0x42092204,
+          0x4209a34c,
+          0x420a225b,
+          0x420aa23b,
+          0x420b227b,
+          0x420ba2f4,
+          0x420c2509,
+          0x420ca3c9,
+          0x420d23e3,
+          0x420da41a,
+          0x42122434,
+          0x421724d0,
+          0x4217a476,
+          0x421c2498,
+          0x421f2453,
+          0x42212520,
+          0x422624b3,
+          0x422b25ef,
+          0x422ba59d,
+          0x422c25d7,
+          0x422ca55c,
+          0x422d253b,
+          0x422da5bc,
+          0x422e2582,
           0x4432072b,
           0x4432873a,
           0x44330746,
@@ -786,69 +795,69 @@ Pod::Spec.new do |s|
           0x4c3d136d,
           0x4c3d937c,
           0x4c3e1389,
-          0x50322a9b,
-          0x5032aaaa,
-          0x50332ab5,
-          0x5033aac5,
-          0x50342ade,
-          0x5034aaf8,
-          0x50352b06,
-          0x5035ab1c,
-          0x50362b2e,
-          0x5036ab44,
-          0x50372b5d,
-          0x5037ab70,
-          0x50382b88,
-          0x5038ab99,
-          0x50392bae,
-          0x5039abc2,
-          0x503a2be2,
-          0x503aabf8,
-          0x503b2c10,
-          0x503bac22,
-          0x503c2c3e,
-          0x503cac55,
-          0x503d2c6e,
-          0x503dac84,
-          0x503e2c91,
-          0x503eaca7,
-          0x503f2cb9,
+          0x50322b68,
+          0x5032ab77,
+          0x50332b82,
+          0x5033ab92,
+          0x50342bab,
+          0x5034abc5,
+          0x50352bd3,
+          0x5035abe9,
+          0x50362bfb,
+          0x5036ac11,
+          0x50372c2a,
+          0x5037ac3d,
+          0x50382c55,
+          0x5038ac66,
+          0x50392c7b,
+          0x5039ac8f,
+          0x503a2caf,
+          0x503aacc5,
+          0x503b2cdd,
+          0x503bacef,
+          0x503c2d0b,
+          0x503cad22,
+          0x503d2d3b,
+          0x503dad51,
+          0x503e2d5e,
+          0x503ead74,
+          0x503f2d86,
           0x503f8382,
-          0x50402ccc,
-          0x5040acdc,
-          0x50412cf6,
-          0x5041ad05,
-          0x50422d1f,
-          0x5042ad3c,
-          0x50432d4c,
-          0x5043ad5c,
-          0x50442d6b,
+          0x50402d99,
+          0x5040ada9,
+          0x50412dc3,
+          0x5041add2,
+          0x50422dec,
+          0x5042ae09,
+          0x50432e19,
+          0x5043ae29,
+          0x50442e38,
           0x5044843f,
-          0x50452d7f,
-          0x5045ad9d,
-          0x50462db0,
-          0x5046adc6,
-          0x50472dd8,
-          0x5047aded,
-          0x50482e13,
-          0x5048ae21,
-          0x50492e34,
-          0x5049ae49,
-          0x504a2e5f,
-          0x504aae6f,
-          0x504b2e8f,
-          0x504baea2,
-          0x504c2ec5,
-          0x504caef3,
-          0x504d2f05,
-          0x504daf22,
-          0x504e2f3d,
-          0x504eaf59,
-          0x504f2f6b,
-          0x504faf82,
-          0x50502f91,
+          0x50452e4c,
+          0x5045ae6a,
+          0x50462e7d,
+          0x5046ae93,
+          0x50472ea5,
+          0x5047aeba,
+          0x50482ee0,
+          0x5048aeee,
+          0x50492f01,
+          0x5049af16,
+          0x504a2f2c,
+          0x504aaf3c,
+          0x504b2f5c,
+          0x504baf6f,
+          0x504c2f92,
+          0x504cafc0,
+          0x504d2fd2,
+          0x504dafef,
+          0x504e300a,
+          0x504eb026,
+          0x504f3038,
+          0x504fb04f,
+          0x5050305e,
           0x505086ef,
-          0x50512fa4,
+          0x50513071,
           0x58320ec9,
           0x68320e8b,
           0x68328c25,
@@ -1209,6 +1218,7 @@ Pod::Spec.new do |s|
           "BAD_SSL_FILETYPE\\0"
           "BAD_WRITE_RETRY\\0"
           "BIO_NOT_SET\\0"
+          "BLOCK_CIPHER_PAD_IS_WRONG\\0"
           "BUFFERED_MESSAGES_ON_CIPHER_CHANGE\\0"
           "CA_DN_LENGTH_MISMATCH\\0"
           "CA_DN_TOO_LONG\\0"
@@ -1233,6 +1243,7 @@ Pod::Spec.new do |s|
           "DOWNGRADE_DETECTED\\0"
           "DTLS_MESSAGE_TOO_BIG\\0"
           "DUPLICATE_EXTENSION\\0"
+          "DUPLICATE_KEY_SHARE\\0"
           "ECC_CERT_NOT_FOR_SIGNING\\0"
           "EMS_STATE_INCONSISTENT\\0"
           "ENCRYPTED_LENGTH_TOO_LONG\\0"
@@ -1270,15 +1281,18 @@ Pod::Spec.new do |s|
           "NO_CERTIFICATE_SET\\0"
           "NO_CIPHERS_AVAILABLE\\0"
           "NO_CIPHERS_PASSED\\0"
+          "NO_CIPHERS_SPECIFIED\\0"
           "NO_CIPHER_MATCH\\0"
           "NO_COMMON_SIGNATURE_ALGORITHMS\\0"
           "NO_COMPRESSION_SPECIFIED\\0"
+          "NO_GROUPS_SPECIFIED\\0"
           "NO_METHOD_SPECIFIED\\0"
           "NO_P256_SUPPORT\\0"
           "NO_PRIVATE_KEY_ASSIGNED\\0"
           "NO_RENEGOTIATION\\0"
           "NO_REQUIRED_DIGEST\\0"
           "NO_SHARED_CIPHER\\0"
+          "NO_SHARED_GROUP\\0"
           "NULL_SSL_CTX\\0"
           "NULL_SSL_METHOD_PASSED\\0"
           "OLD_SESSION_CIPHER_NOT_RETURNED\\0"
@@ -1294,6 +1308,7 @@ Pod::Spec.new do |s|
           "READ_TIMEOUT_EXPIRED\\0"
           "RECORD_LENGTH_MISMATCH\\0"
           "RECORD_TOO_LARGE\\0"
+          "RENEGOTIATION_EMS_MISMATCH\\0"
           "RENEGOTIATION_ENCODING_ERR\\0"
           "RENEGOTIATION_MISMATCH\\0"
           "REQUIRED_CIPHER_MISSING\\0"
@@ -1338,12 +1353,15 @@ Pod::Spec.new do |s|
           "TLSV1_ALERT_USER_CANCELLED\\0"
           "TLSV1_BAD_CERTIFICATE_HASH_VALUE\\0"
           "TLSV1_BAD_CERTIFICATE_STATUS_RESPONSE\\0"
+          "TLSV1_CERTIFICATE_REQUIRED\\0"
           "TLSV1_CERTIFICATE_UNOBTAINABLE\\0"
+          "TLSV1_UNKNOWN_PSK_IDENTITY\\0"
           "TLSV1_UNRECOGNIZED_NAME\\0"
           "TLSV1_UNSUPPORTED_EXTENSION\\0"
           "TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST\\0"
           "TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG\\0"
           "TOO_MANY_EMPTY_FRAGMENTS\\0"
+          "TOO_MANY_KEY_UPDATES\\0"
           "TOO_MANY_WARNING_ALERTS\\0"
           "UNABLE_TO_FIND_ECDH_PARAMETERS\\0"
           "UNEXPECTED_EXTENSION\\0"
diff --git a/src/objective-c/CronetFramework.podspec b/src/objective-c/CronetFramework.podspec
index 3ebcacf055..2f47b02c0c 100644
--- a/src/objective-c/CronetFramework.podspec
+++ b/src/objective-c/CronetFramework.podspec
@@ -30,14 +30,47 @@
 
 Pod::Spec.new do |s|
   s.name         = "CronetFramework"
-  s.version      = "0.0.2"
+  s.version      = "0.0.3"
   s.summary      = "Cronet, precompiled and used as a framework."
   s.homepage     = "http://chromium.org"
-  s.license      = { :type => 'BSD' }
+  s.license      = {
+    :type => 'BSD',
+    :text => <<-LICENSE
+      Copyright 2015, Google Inc.
+      All rights reserved.
+
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are
+      met:
+
+          * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+          * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following disclaimer
+      in the documentation and/or other materials provided with the
+      distribution.
+          * Neither the name of Google Inc. nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+      "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+      LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+      A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+      OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+      LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+      THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+      OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+    LICENSE
+  }
   s.vendored_framework = "Cronet.framework"
   s.author             = "The Chromium Authors"
-  s.ios.deployment_target = "7.1"
+  s.ios.deployment_target = "8.0"
   s.source       = { :http => 'https://storage.googleapis.com/grpc-precompiled-binaries/cronet/Cronet.framework.zip' }
   s.preserve_paths = "Cronet.framework"
   s.public_header_files = "Cronet.framework/Headers/**/*{.h}"
+  s.source_files = "Cronet.framework/Headers/**/*{.h}"
 end
diff --git a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
index c1623a0068..4a3f3fa4a1 100644
--- a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
+++ b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
@@ -40,18 +40,15 @@
 @interface GRPCCall (ChannelArg)
 
 /**
- * Use the provided @c userAgentPrefix at the beginning of the HTTP User Agent
- * string for all calls to the specified @c host.
+ * Use the provided @c userAgentPrefix at the beginning of the HTTP User Agent string for all calls
+ * to the specified @c host.
  */
-+ (void)setUserAgentPrefix:(nonnull NSString *)userAgentPrefix
-                   forHost:(nonnull NSString *)host;
++ (void)setUserAgentPrefix:(nonnull NSString *)userAgentPrefix forHost:(nonnull NSString *)host;
 
-/** The default response size limit is 4MB. Set this to override that default.
- */
+/** The default response size limit is 4MB. Set this to override that default. */
 + (void)setResponseSizeLimit:(NSUInteger)limit forHost:(nonnull NSString *)host;
 
-+ (void)closeOpenConnections DEPRECATED_MSG_ATTRIBUTE(
-    "The API for this feature is experimental, "
-    "and might be removed or modified at any "
-    "time.");
++ (void)closeOpenConnections DEPRECATED_MSG_ATTRIBUTE("The API for this feature is experimental, "
+                                                      "and might be removed or modified at any "
+                                                      "time.");
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h b/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
index beae0d11a2..ac2a37d75f 100644
--- a/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
+++ b/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
@@ -33,26 +33,24 @@
 
 #import "GRPCCall.h"
 
-/** Helpers for setting TLS Trusted Roots, Client Certificates, and Private Key
- */
+/** Helpers for setting TLS Trusted Roots, Client Certificates, and Private Key */
 @interface GRPCCall (ChannelCredentials)
 
 /**
- * Use the provided @c pemRootCert as the set of trusted root Certificate
- * Authorities for @c host.
+ * Use the provided @c pemRootCert as the set of trusted root Certificate Authorities for @c host.
  */
 + (BOOL)setTLSPEMRootCerts:(nullable NSString *)pemRootCert
                    forHost:(nonnull NSString *)host
-                     error:(NSError *_Nullable *_Nullable)errorPtr;
+                     error:(NSError * _Nullable * _Nullable)errorPtr;
 /**
- * Configures @c host with TLS/SSL Client Credentials and optionally trusted
- * root Certificate Authorities. If @c pemRootCerts is nil, the default CA
- * Certificates bundled with gRPC will be used.
+ * Configures @c host with TLS/SSL Client Credentials and optionally trusted root Certificate
+ * Authorities. If @c pemRootCerts is nil, the default CA Certificates bundled with gRPC will be
+ * used.
  */
 + (BOOL)setTLSPEMRootCerts:(nullable NSString *)pemRootCerts
             withPrivateKey:(nullable NSString *)pemPrivateKey
              withCertChain:(nullable NSString *)pemCertChain
                    forHost:(nonnull NSString *)host
-                     error:(NSError *_Nullable *_Nullable)errorPtr;
+                     error:(NSError * _Nullable * _Nullable)errorPtr;
 
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+OAuth2.h b/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
index 467c6332c1..6b443877e9 100644
--- a/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
+++ b/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
@@ -37,17 +37,15 @@
 @interface GRPCCall (OAuth2)
 
 /**
- * Setting this property is equivalent to setting "Bearer <passed token>" as the
- * value of the request header with key "authorization" (the authorization
- * header). Setting it to nil removes the authorization header from the request.
- * The value obtained by getting the property is the OAuth2 bearer token if the
- * authorization header of the request has the form "Bearer <token>", or nil
- * otherwise.
+ * Setting this property is equivalent to setting "Bearer <passed token>" as the value of the
+ * request header with key "authorization" (the authorization header). Setting it to nil removes the
+ * authorization header from the request.
+ * The value obtained by getting the property is the OAuth2 bearer token if the authorization header
+ * of the request has the form "Bearer <token>", or nil otherwise.
  */
 @property(atomic, copy) NSString *oauth2AccessToken;
 
-/** Returns the value (if any) of the "www-authenticate" response header (the
- * challenge header). */
+/** Returns the value (if any) of the "www-authenticate" response header (the challenge header). */
 @property(atomic, readonly) NSString *oauth2ChallengeHeader;
 
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+Tests.h b/src/objective-c/GRPCClient/GRPCCall+Tests.h
index f517f3aac8..184ad09c5c 100644
--- a/src/objective-c/GRPCClient/GRPCCall+Tests.h
+++ b/src/objective-c/GRPCClient/GRPCCall+Tests.h
@@ -34,36 +34,33 @@
 #import "GRPCCall.h"
 
 /**
- * Methods to let tune down the security of gRPC connections for specific hosts.
- * These shouldn't be used in releases, but are sometimes needed for testing.
+ * Methods to let tune down the security of gRPC connections for specific hosts. These shouldn't be
+ * used in releases, but are sometimes needed for testing.
  */
 @interface GRPCCall (Tests)
 
 /**
- * Establish all SSL connections to the provided host using the passed SSL
- * target name and the root certificates found in the file at |certsPath|.
+ * Establish all SSL connections to the provided host using the passed SSL target name and the root
+ * certificates found in the file at |certsPath|.
  *
- * Must be called before any gRPC call to that host is made. It's illegal to
- * pass the same host to more than one invocation of the methods of this
- * category.
+ * Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
+ * more than one invocation of the methods of this category.
  */
 + (void)useTestCertsPath:(NSString *)certsPath
                 testName:(NSString *)testName
                  forHost:(NSString *)host;
 
 /**
- * Establish all connections to the provided host using cleartext instead of
- * SSL.
+ * Establish all connections to the provided host using cleartext instead of SSL.
  *
- * Must be called before any gRPC call to that host is made. It's illegal to
- * pass the same host to more than one invocation of the methods of this
- * category.
+ * Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
+ * more than one invocation of the methods of this category.
  */
 + (void)useInsecureConnectionsForHost:(NSString *)host;
 
 /**
- * Resets all host configurations to their default values, and flushes all
- * connections from the cache.
+ * Resets all host configurations to their default values, and flushes all connections from the
+ * cache.
  */
 + (void)resetHostSettings;
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index 5ed160d7a0..7645bb1d34 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -34,18 +34,17 @@
 /**
  * The gRPC protocol is an RPC protocol on top of HTTP2.
  *
- * While the most common type of RPC receives only one request message and
- * returns only one response message, the protocol also supports RPCs that
- * return multiple individual messages in a streaming fashion, RPCs that accept
- * a stream of request messages, or RPCs with both streaming requests and
+ * While the most common type of RPC receives only one request message and returns only one response
+ * message, the protocol also supports RPCs that return multiple individual messages in a streaming
+ * fashion, RPCs that accept a stream of request messages, or RPCs with both streaming requests and
  * responses.
  *
- * Conceptually, each gRPC call consists of a bidirectional stream of binary
- * messages, with RPCs of the "non-streaming type" sending only one message in
- * the corresponding direction (the protocol doesn't make any distinction).
+ * Conceptually, each gRPC call consists of a bidirectional stream of binary messages, with RPCs of
+ * the "non-streaming type" sending only one message in the corresponding direction (the protocol
+ * doesn't make any distinction).
  *
- * Each RPC uses a different HTTP2 stream, and thus multiple simultaneous RPCs
- * can be multiplexed transparently on the same TCP connection.
+ * Each RPC uses a different HTTP2 stream, and thus multiple simultaneous RPCs can be multiplexed
+ * transparently on the same TCP connection.
  */
 
 #import <Foundation/Foundation.h>
@@ -60,56 +59,51 @@ extern NSString *const kGRPCErrorDomain;
 
 /**
  * gRPC error codes.
- * Note that a few of these are never produced by the gRPC libraries, but are of
- * general utility for server applications to produce.
+ * Note that a few of these are never produced by the gRPC libraries, but are of general utility for
+ * server applications to produce.
  */
 typedef NS_ENUM(NSUInteger, GRPCErrorCode) {
   /** The operation was cancelled (typically by the caller). */
   GRPCErrorCodeCancelled = 1,
 
   /**
-   * Unknown error. Errors raised by APIs that do not return enough error
-   * information may be
+   * Unknown error. Errors raised by APIs that do not return enough error information may be
    * converted to this error.
    */
   GRPCErrorCodeUnknown = 2,
 
   /**
-   * The client specified an invalid argument. Note that this differs from
-   * FAILED_PRECONDITION.
-   * INVALID_ARGUMENT indicates arguments that are problematic regardless of the
-   * state of the server (e.g., a malformed file name).
+   * The client specified an invalid argument. Note that this differs from FAILED_PRECONDITION.
+   * INVALID_ARGUMENT indicates arguments that are problematic regardless of the state of the
+   * server (e.g., a malformed file name).
    */
   GRPCErrorCodeInvalidArgument = 3,
 
   /**
-   * Deadline expired before operation could complete. For operations that
-   * change the state of the server, this error may be returned even if the
-   * operation has completed successfully. For example, a successful response
-   * from the server could have been delayed long enough for the deadline to
-   * expire.
+   * Deadline expired before operation could complete. For operations that change the state of the
+   * server, this error may be returned even if the operation has completed successfully. For
+   * example, a successful response from the server could have been delayed long enough for the
+   * deadline to expire.
    */
   GRPCErrorCodeDeadlineExceeded = 4,
 
   /** Some requested entity (e.g., file or directory) was not found. */
   GRPCErrorCodeNotFound = 5,
 
-  /** Some entity that we attempted to create (e.g., file or directory) already
-     exists. */
+  /** Some entity that we attempted to create (e.g., file or directory) already exists. */
   GRPCErrorCodeAlreadyExists = 6,
 
   /**
-   * The caller does not have permission to execute the specified operation.
-   * PERMISSION_DENIED isn't used for rejections caused by exhausting some
-   * resource (RESOURCE_EXHAUSTED is used instead for those errors).
-   * PERMISSION_DENIED doesn't indicate a failure to identify the caller
+   * The caller does not have permission to execute the specified operation. PERMISSION_DENIED isn't
+   * used for rejections caused by exhausting some resource (RESOURCE_EXHAUSTED is used instead for
+   * those errors). PERMISSION_DENIED doesn't indicate a failure to identify the caller
    * (UNAUTHENTICATED is used instead for those errors).
    */
   GRPCErrorCodePermissionDenied = 7,
 
   /**
-   * The request does not have valid authentication credentials for the
-   * operation (e.g. the caller's identity can't be verified).
+   * The request does not have valid authentication credentials for the operation (e.g. the caller's
+   * identity can't be verified).
    */
   GRPCErrorCodeUnauthenticated = 16,
 
@@ -117,47 +111,42 @@ typedef NS_ENUM(NSUInteger, GRPCErrorCode) {
   GRPCErrorCodeResourceExhausted = 8,
 
   /**
-   * The RPC was rejected because the server is not in a state required for the
-   * procedure's
+   * The RPC was rejected because the server is not in a state required for the procedure's
    * execution. For example, a directory to be deleted may be non-empty, etc.
-   * The client should not retry until the server state has been explicitly
-   * fixed (e.g. by
-   * performing another RPC). The details depend on the service being called,
-   * and should be found in the NSError's userInfo.
+   * The client should not retry until the server state has been explicitly fixed (e.g. by
+   * performing another RPC). The details depend on the service being called, and should be found in
+   * the NSError's userInfo.
    */
   GRPCErrorCodeFailedPrecondition = 9,
 
   /**
-   * The RPC was aborted, typically due to a concurrency issue like sequencer
-   * check failures, transaction aborts, etc. The client should retry at a
-   * higher-level (e.g., restarting a read-modify-write sequence).
+   * The RPC was aborted, typically due to a concurrency issue like sequencer check failures,
+   * transaction aborts, etc. The client should retry at a higher-level (e.g., restarting a read-
+   * modify-write sequence).
    */
   GRPCErrorCodeAborted = 10,
 
   /**
-   * The RPC was attempted past the valid range. E.g., enumerating past the end
-   * of a list.
-   * Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed
-   * if the system state changes. For example, an RPC to get elements of a list
-   * will generate INVALID_ARGUMENT if asked to return the element at a negative
-   * index, but it will generate OUT_OF_RANGE if asked to return the element at
-   * an index past the current size of the list.
+   * The RPC was attempted past the valid range. E.g., enumerating past the end of a list.
+   * Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed if the system state
+   * changes. For example, an RPC to get elements of a list will generate INVALID_ARGUMENT if asked
+   * to return the element at a negative index, but it will generate OUT_OF_RANGE if asked to return
+   * the element at an index past the current size of the list.
    */
   GRPCErrorCodeOutOfRange = 11,
 
-  /** The procedure is not implemented or not supported/enabled in this server.
-     */
+  /** The procedure is not implemented or not supported/enabled in this server. */
   GRPCErrorCodeUnimplemented = 12,
 
   /**
-   * Internal error. Means some invariant expected by the server application or
-   * the gRPC library has been broken.
+   * Internal error. Means some invariant expected by the server application or the gRPC library has
+   * been broken.
    */
   GRPCErrorCodeInternal = 13,
 
   /**
-   * The server is currently unavailable. This is most likely a transient
-   * condition and may be corrected by retrying with a backoff.
+   * The server is currently unavailable. This is most likely a transient condition and may be
+   * corrected by retrying with a backoff.
    */
   GRPCErrorCodeUnavailable = 14,
 
@@ -169,19 +158,17 @@ typedef NS_ENUM(NSUInteger, GRPCErrorCode) {
  * Safety remark of a gRPC method as defined in RFC 2616 Section 9.1
  */
 typedef NS_ENUM(NSUInteger, GRPCCallSafety) {
-  /** Signal that there is no guarantees on how the call affects the server
-     state. */
+  /** Signal that there is no guarantees on how the call affects the server state. */
   GRPCCallSafetyDefault = 0,
   /** Signal that the call is idempotent. gRPC is free to use PUT verb. */
   GRPCCallSafetyIdempotentRequest = 1,
-  /** Signal that the call is cacheable and will not affect server state. gRPC
-     is free to use GET verb. */
+  /** Signal that the call is cacheable and will not affect server state. gRPC is free to use GET verb. */
   GRPCCallSafetyCacheableRequest = 2,
 };
 
 /**
- * Keys used in |NSError|'s |userInfo| dictionary to store the response headers
- * and trailers sent by the server.
+ * Keys used in |NSError|'s |userInfo| dictionary to store the response headers and trailers sent by
+ * the server.
  */
 extern id const kGRPCHeadersKey;
 extern id const kGRPCTrailersKey;
@@ -192,24 +179,20 @@ extern id const kGRPCTrailersKey;
 @interface GRPCCall : GRXWriter
 
 /**
- * The container of the request headers of an RPC conforms to this protocol,
- * which is a subset of NSMutableDictionary's interface. It will become a
- * NSMutableDictionary later on. The keys of this container are the header
- * names, which per the HTTP standard are case-insensitive. They are stored in
- * lowercase (which is how HTTP/2 mandates them on the wire), and can only
- * consist of ASCII characters.
- * A header value is a NSString object (with only ASCII characters), unless the
- * header name has the suffix "-bin", in which case the value has to be a NSData
- * object.
+ * The container of the request headers of an RPC conforms to this protocol, which is a subset of
+ * NSMutableDictionary's interface. It will become a NSMutableDictionary later on.
+ * The keys of this container are the header names, which per the HTTP standard are case-
+ * insensitive. They are stored in lowercase (which is how HTTP/2 mandates them on the wire), and
+ * can only consist of ASCII characters.
+ * A header value is a NSString object (with only ASCII characters), unless the header name has the
+ * suffix "-bin", in which case the value has to be a NSData object.
  */
 /**
- * These HTTP headers will be passed to the server as part of this call. Each
- * HTTP header is a name-value pair with string names and either string or
- * binary values.
+ * These HTTP headers will be passed to the server as part of this call. Each HTTP header is a
+ * name-value pair with string names and either string or binary values.
  *
- * The passed dictionary has to use NSString keys, corresponding to the header
- * names. The value associated to each can be a NSString object or a NSData
- * object. E.g.:
+ * The passed dictionary has to use NSString keys, corresponding to the header names. The value
+ * associated to each can be a NSString object or a NSData object. E.g.:
  *
  * call.requestHeaders = @{@"authorization": @"Bearer ..."};
  *
@@ -222,61 +205,53 @@ extern id const kGRPCTrailersKey;
 @property(atomic, readonly) NSMutableDictionary *requestHeaders;
 
 /**
- * This dictionary is populated with the HTTP headers received from the server.
- * This happens before any response message is received from the server. It has
- * the same structure as the request headers dictionary: Keys are NSString
- * header names; names ending with the suffix "-bin" have a NSData value; the
- * others have a NSString value.
+ * This dictionary is populated with the HTTP headers received from the server. This happens before
+ * any response message is received from the server. It has the same structure as the request
+ * headers dictionary: Keys are NSString header names; names ending with the suffix "-bin" have a
+ * NSData value; the others have a NSString value.
  *
- * The value of this property is nil until all response headers are received,
- * and will change before any of -writeValue: or -writesFinishedWithError: are
- * sent to the writeable.
+ * The value of this property is nil until all response headers are received, and will change before
+ * any of -writeValue: or -writesFinishedWithError: are sent to the writeable.
  */
 @property(atomic, readonly) NSDictionary *responseHeaders;
 
 /**
- * Same as responseHeaders, but populated with the HTTP trailers received from
- * the server before the call finishes.
+ * Same as responseHeaders, but populated with the HTTP trailers received from the server before the
+ * call finishes.
  *
- * The value of this property is nil until all response trailers are received,
- * and will change before -writesFinishedWithError: is sent to the writeable.
+ * The value of this property is nil until all response trailers are received, and will change
+ * before -writesFinishedWithError: is sent to the writeable.
  */
 @property(atomic, readonly) NSDictionary *responseTrailers;
 
 /**
- * The request writer has to write NSData objects into the provided Writeable.
- * The server will receive each of those separately and in order as distinct
- * messages.
- * A gRPC call might not complete until the request writer finishes. On the
- * other hand, the request finishing doesn't necessarily make the call to
- * finish, as the server might continue sending messages to the response side of
- * the call indefinitely (depending on the semantics of the specific remote
- * method called).
+ * The request writer has to write NSData objects into the provided Writeable. The server will
+ * receive each of those separately and in order as distinct messages.
+ * A gRPC call might not complete until the request writer finishes. On the other hand, the request
+ * finishing doesn't necessarily make the call to finish, as the server might continue sending
+ * messages to the response side of the call indefinitely (depending on the semantics of the
+ * specific remote method called).
  * To finish a call right away, invoke cancel.
- * host parameter should not contain the scheme (http:// or https://), only the
- * name or IP addr and the port number, for example @"localhost:5050".
+ * host parameter should not contain the scheme (http:// or https://), only the name or IP addr
+ * and the port number, for example @"localhost:5050".
  */
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
-              requestsWriter:(GRXWriter *)requestsWriter
-    NS_DESIGNATED_INITIALIZER;
+              requestsWriter:(GRXWriter *)requestsWriter NS_DESIGNATED_INITIALIZER;
 
 /**
- * Finishes the request side of this call, notifies the server that the RPC
- * should be cancelled, and finishes the response side of the call with an error
- * of code CANCELED.
+ * Finishes the request side of this call, notifies the server that the RPC should be cancelled, and
+ * finishes the response side of the call with an error of code CANCELED.
  */
 - (void)cancel;
 
 /**
  * Set the call flag for a specific host path.
  *
- * Host parameter should not contain the scheme (http:// or https://), only the
- * name or IP addr and the port number, for example @"localhost:5050".
+ * Host parameter should not contain the scheme (http:// or https://), only the name or IP addr
+ * and the port number, for example @"localhost:5050".
  */
-+ (void)setCallSafety:(GRPCCallSafety)callSafety
-                 host:(NSString *)host
-                 path:(NSString *)path;
++ (void)setCallSafety:(GRPCCallSafety)callSafety host:(NSString *)host path:(NSString *)path;
 
 // TODO(jcanizales): Let specify a deadline. As a category of GRXWriter?
 @end
@@ -285,7 +260,7 @@ extern id const kGRPCTrailersKey;
 
 /** This protocol is kept for backwards compatibility with existing code. */
 DEPRECATED_MSG_ATTRIBUTE("Use NSDictionary or NSMutableDictionary instead.")
-@protocol GRPCRequestHeaders<NSObject>
+@protocol GRPCRequestHeaders <NSObject>
 @property(nonatomic, readonly) NSUInteger count;
 
 - (id)objectForKeyedSubscript:(id)key;
@@ -298,6 +273,6 @@ DEPRECATED_MSG_ATTRIBUTE("Use NSDictionary or NSMutableDictionary instead.")
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated"
 /** This is only needed for backwards-compatibility. */
-@interface NSMutableDictionary (GRPCRequestHeaders)<GRPCRequestHeaders>
+@interface NSMutableDictionary (GRPCRequestHeaders) <GRPCRequestHeaders>
 @end
 #pragma clang diagnostic pop
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 85d141aa09..44393f6b99 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -33,9 +33,9 @@
 
 #import "GRPCCall.h"
 
-#import <RxLibrary/GRXConcurrentWriteable.h>
 #include <grpc/grpc.h>
 #include <grpc/support/time.h>
+#import <RxLibrary/GRXConcurrentWriteable.h>
 
 #import "private/GRPCConnectivityMonitor.h"
 #import "private/GRPCHost.h"
@@ -45,11 +45,11 @@
 #import "private/NSDictionary+GRPC.h"
 #import "private/NSError+GRPC.h"
 
-NSString *const kGRPCHeadersKey = @"io.grpc.HeadersKey";
-NSString *const kGRPCTrailersKey = @"io.grpc.TrailersKey";
+NSString * const kGRPCHeadersKey = @"io.grpc.HeadersKey";
+NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 static NSMutableDictionary *callFlags;
 
-@interface GRPCCall ()<GRXWriteable>
+@interface GRPCCall () <GRXWriteable>
 // Make them read-write.
 @property(atomic, strong) NSDictionary *responseHeaders;
 @property(atomic, strong) NSDictionary *responseTrailers;
@@ -85,21 +85,17 @@ static NSMutableDictionary *callFlags;
   // correct ordering.
   GRXConcurrentWriteable *_responseWriteable;
 
-  // The network thread wants the requestWriter to resume (when the server is
-  // ready for more input), or to stop (on errors), concurrently with user
-  // threads that want to start it, pause it or stop it. Because a writer isn't
-  // thread-safe, we'll synchronize those operations on it.
-  // We don't use a dispatch queue for that purpose, because the writer can call
-  // writeValue: or writesFinishedWithError: on this GRPCCall as part of those
-  // operations. We want to be able to pause the writer immediately on
-  // writeValue:, so we need our locking to be recursive.
+  // The network thread wants the requestWriter to resume (when the server is ready for more input),
+  // or to stop (on errors), concurrently with user threads that want to start it, pause it or stop
+  // it. Because a writer isn't thread-safe, we'll synchronize those operations on it.
+  // We don't use a dispatch queue for that purpose, because the writer can call writeValue: or
+  // writesFinishedWithError: on this GRPCCall as part of those operations. We want to be able to
+  // pause the writer immediately on writeValue:, so we need our locking to be recursive.
   GRXWriter *_requestWriter;
 
   // To create a retain cycle when a call is started, up until it finishes. See
-  // |startWithWriteable:| and |finishWithError:|. This saves users from having
-  // to retain a
-  // reference to the call object if all they're interested in is the handler
-  // being executed when
+  // |startWithWriteable:| and |finishWithError:|. This saves users from having to retain a
+  // reference to the call object if all they're interested in is the handler being executed when
   // the response arrives.
   GRPCCall *_retainSelf;
 
@@ -108,16 +104,13 @@ static NSMutableDictionary *callFlags;
 
 @synthesize state = _state;
 
-// TODO(jcanizales): If grpc_init is idempotent, this should be changed from
-// load to initialize.
+// TODO(jcanizales): If grpc_init is idempotent, this should be changed from load to initialize.
 + (void)load {
   grpc_init();
   callFlags = [NSMutableDictionary dictionary];
 }
 
-+ (void)setCallSafety:(GRPCCallSafety)callSafety
-                 host:(NSString *)host
-                 path:(NSString *)path {
++ (void)setCallSafety:(GRPCCallSafety)callSafety host:(NSString *)host path:(NSString *)path {
   NSString *hostAndPath = [NSString stringWithFormat:@"%@/%@", host, path];
   switch (callSafety) {
     case GRPCCallSafetyDefault:
@@ -148,8 +141,7 @@ static NSMutableDictionary *callFlags;
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestWriter {
   if (!host || !path) {
-    [NSException raise:NSInvalidArgumentException
-                format:@"Neither host nor path can be nil."];
+    [NSException raise:NSInvalidArgumentException format:@"Neither host nor path can be nil."];
   }
   if (requestWriter.state != GRXWriterStateNotStarted) {
     [NSException raise:NSInvalidArgumentException
@@ -199,10 +191,7 @@ static NSMutableDictionary *callFlags;
 - (void)cancel {
   [self finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
                                             code:GRPCErrorCodeCancelled
-                                        userInfo:@{
-                                          NSLocalizedDescriptionKey :
-                                              @"Canceled by app"
-                                        }]];
+                                        userInfo:@{NSLocalizedDescriptionKey: @"Canceled by app"}]];
   [self cancelCall];
 }
 
@@ -217,18 +206,15 @@ static NSMutableDictionary *callFlags;
 
 // Only called from the call queue.
 // The handler will be called from the network queue.
-- (void)startReadWithHandler:(void (^)(grpc_byte_buffer *))handler {
+- (void)startReadWithHandler:(void(^)(grpc_byte_buffer *))handler {
   // TODO(jcanizales): Add error handlers for async failures
-  [_wrappedCall startBatchWithOperations:@[ [[GRPCOpRecvMessage alloc]
-                                             initWithHandler:handler] ]];
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpRecvMessage alloc] initWithHandler:handler]]];
 }
 
 // Called initially from the network queue once response headers are received,
-// then "recursively" from the responseWriteable queue after each response from
-// the
+// then "recursively" from the responseWriteable queue after each response from the
 // server has been written.
-// If the call is currently paused, this is a noop. Restarting the call will
-// invoke this
+// If the call is currently paused, this is a noop. Restarting the call will invoke this
 // method.
 // TODO(jcanizales): Rename to readResponseIfNotPaused.
 - (void)startNextRead {
@@ -251,23 +237,15 @@ static NSMutableDictionary *callFlags;
         // don't want to throw, because the app shouldn't crash for a behavior
         // that's on the hands of any server to have. Instead we finish and ask
         // the server to cancel.
-        [weakSelf
-            finishWithError:[NSError
-                                errorWithDomain:kGRPCErrorDomain
-                                           code:GRPCErrorCodeResourceExhausted
-                                       userInfo:@{
-                                         NSLocalizedDescriptionKey :
-                                             @"Client does not have enough "
-                                             @"memory to hold the server "
-                                             @"response."
-                                       }]];
+        [weakSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
+                                                      code:GRPCErrorCodeResourceExhausted
+                                                  userInfo:@{NSLocalizedDescriptionKey: @"Client does not have enough memory to hold the server response."}]];
         [weakSelf cancelCall];
         return;
       }
-      [weakWriteable enqueueValue:data
-                completionHandler:^{
-                  [weakSelf startNextRead];
-                }];
+      [weakWriteable enqueueValue:data completionHandler:^{
+        [weakSelf startNextRead];
+      }];
     }];
   });
 }
@@ -276,22 +254,19 @@ static NSMutableDictionary *callFlags;
 
 - (void)sendHeaders:(NSDictionary *)headers {
   // TODO(jcanizales): Add error handlers for async failures
-  [_wrappedCall startBatchWithOperations:@[
-    [[GRPCOpSendMetadata alloc]
-        initWithMetadata:headers
-                   flags:[GRPCCall callFlagsForHost:_host path:_path]
-                 handler:nil]
-  ]];
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendMetadata alloc] initWithMetadata:headers
+                                                                                  flags:[GRPCCall callFlagsForHost:_host path:_path]
+                                                                                handler:nil]]];
 }
 
 #pragma mark GRXWriteable implementation
 
 // Only called from the call queue. The error handler will be called from the
 // network queue if the write didn't succeed.
-- (void)writeMessage:(NSData *)message
-    withErrorHandler:(void (^)())errorHandler {
+- (void)writeMessage:(NSData *)message withErrorHandler:(void (^)())errorHandler {
+
   __weak GRPCCall *weakSelf = self;
-  void (^resumingHandler)(void) = ^{
+  void(^resumingHandler)(void) = ^{
     // Resume the request writer.
     GRPCCall *strongSelf = weakSelf;
     if (strongSelf) {
@@ -300,9 +275,8 @@ static NSMutableDictionary *callFlags;
       }
     }
   };
-  [_wrappedCall startBatchWithOperations:@[ [[GRPCOpSendMessage alloc]
-                                             initWithMessage:message
-                                                     handler:resumingHandler] ]
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendMessage alloc] initWithMessage:message
+                                                                              handler:resumingHandler]]
                             errorHandler:errorHandler];
 }
 
@@ -317,20 +291,18 @@ static NSMutableDictionary *callFlags;
 
   __weak GRPCCall *weakSelf = self;
   dispatch_async(_callQueue, ^{
-    [weakSelf writeMessage:value
-          withErrorHandler:^{
-            [weakSelf
-                finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
+    [weakSelf writeMessage:value withErrorHandler:^{
+      [weakSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
                                                     code:GRPCErrorCodeInternal
                                                 userInfo:nil]];
-          }];
+    }];
   });
 }
 
 // Only called from the call queue. The error handler will be called from the
 // network queue if the requests stream couldn't be closed successfully.
 - (void)finishRequestWithErrorHandler:(void (^)())errorHandler {
-  [_wrappedCall startBatchWithOperations:@[ [[GRPCOpSendClose alloc] init] ]
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendClose alloc] init]]
                             errorHandler:errorHandler];
 }
 
@@ -351,19 +323,17 @@ static NSMutableDictionary *callFlags;
 
 #pragma mark Invoke
 
-// Both handlers will eventually be called, from the network queue. Writes can
-// start immediately after this.
+// Both handlers will eventually be called, from the network queue. Writes can start immediately
+// after this.
 // The first one (headersHandler), when the response headers are received.
 // The second one (completionHandler), whenever the RPC finishes for any reason.
-- (void)invokeCallWithHeadersHandler:(void (^)(NSDictionary *))headersHandler
-                   completionHandler:
-                       (void (^)(NSError *, NSDictionary *))completionHandler {
+- (void)invokeCallWithHeadersHandler:(void(^)(NSDictionary *))headersHandler
+                    completionHandler:(void(^)(NSError *, NSDictionary *))completionHandler {
   // TODO(jcanizales): Add error handlers for async failures
-  [_wrappedCall startBatchWithOperations:@[ [[GRPCOpRecvMetadata alloc]
-                                             initWithHandler:headersHandler] ]];
-  [_wrappedCall
-      startBatchWithOperations:@[ [[GRPCOpRecvStatus alloc]
-                                   initWithHandler:completionHandler] ]];
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpRecvMetadata alloc]
+                                            initWithHandler:headersHandler]]];
+  [_wrappedCall startBatchWithOperations:@[[[GRPCOpRecvStatus alloc]
+                                            initWithHandler:completionHandler]]];
 }
 
 - (void)invokeCall {
@@ -371,31 +341,27 @@ static NSMutableDictionary *callFlags;
     // Response headers received.
     self.responseHeaders = headers;
     [self startNextRead];
-  }
-      completionHandler:^(NSError *error, NSDictionary *trailers) {
-        self.responseTrailers = trailers;
-
-        if (error) {
-          NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
-          if (error.userInfo) {
-            [userInfo addEntriesFromDictionary:error.userInfo];
-          }
-          userInfo[kGRPCTrailersKey] = self.responseTrailers;
-          // TODO(jcanizales): The C gRPC library doesn't guarantee that the
-          // headers block will be called before this one, so an error might end
-          // up with trailers but no headers. We shouldn't call finishWithError
-          // until ater both blocks are called. It is also when this is done
-          // that we can provide a merged view of response headers and trailers
-          // in a thread-safe way.
-          if (self.responseHeaders) {
-            userInfo[kGRPCHeadersKey] = self.responseHeaders;
-          }
-          error = [NSError errorWithDomain:error.domain
-                                      code:error.code
-                                  userInfo:userInfo];
-        }
-        [self finishWithError:error];
-      }];
+  } completionHandler:^(NSError *error, NSDictionary *trailers) {
+    self.responseTrailers = trailers;
+
+    if (error) {
+      NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
+      if (error.userInfo) {
+        [userInfo addEntriesFromDictionary:error.userInfo];
+      }
+      userInfo[kGRPCTrailersKey] = self.responseTrailers;
+      // TODO(jcanizales): The C gRPC library doesn't guarantee that the headers block will be
+      // called before this one, so an error might end up with trailers but no headers. We
+      // shouldn't call finishWithError until ater both blocks are called. It is also when this is
+      // done that we can provide a merged view of response headers and trailers in a thread-safe
+      // way.
+      if (self.responseHeaders) {
+        userInfo[kGRPCHeadersKey] = self.responseHeaders;
+      }
+      error = [NSError errorWithDomain:error.domain code:error.code userInfo:userInfo];
+    }
+    [self finishWithError:error];
+  }];
   // Now that the RPC has been initiated, request writes can start.
   @synchronized(_requestWriter) {
     [_requestWriter startWithWriteable:self];
@@ -409,16 +375,14 @@ static NSMutableDictionary *callFlags;
     _state = GRXWriterStateStarted;
   }
 
-  // Create a retain cycle so that this instance lives until the RPC finishes
-  // (or is cancelled). This makes RPCs in which the call isn't externally
-  // retained possible (as long as it is started before being autoreleased).
-  // Care is taken not to retain self strongly in any of the blocks used in this
-  // implementation, so that the life of the instance is determined by this
-  // retain cycle.
+  // Create a retain cycle so that this instance lives until the RPC finishes (or is cancelled).
+  // This makes RPCs in which the call isn't externally retained possible (as long as it is started
+  // before being autoreleased).
+  // Care is taken not to retain self strongly in any of the blocks used in this implementation, so
+  // that the life of the instance is determined by this retain cycle.
   _retainSelf = self;
 
-  _responseWriteable =
-      [[GRXConcurrentWriteable alloc] initWithWriteable:writeable];
+  _responseWriteable = [[GRXConcurrentWriteable alloc] initWithWriteable:writeable];
 
   _wrappedCall = [[GRPCWrappedCall alloc] initWithHost:_host path:_path];
   NSAssert(_wrappedCall, @"Error allocating RPC objects. Low memory?");
@@ -427,37 +391,29 @@ static NSMutableDictionary *callFlags;
   [self invokeCall];
 
   // TODO(jcanizales): Extract this logic somewhere common.
-  NSString *host =
-  [NSURL URLWithString:[@"https://" stringByAppendingString:_host]].host;
+  NSString *host = [NSURL URLWithString:[@"https://" stringByAppendingString:_host]].host;
   if (!host) {
     // TODO(jcanizales): Check this on init.
-    [NSException raise:NSInvalidArgumentException
-                format:@"host of %@ is nil", _host];
+    [NSException raise:NSInvalidArgumentException format:@"host of %@ is nil", _host];
   }
   __weak typeof(self) weakSelf = self;
   _connectivityMonitor = [GRPCConnectivityMonitor monitorWithHost:host];
   void (^handler)() = ^{
     typeof(self) strongSelf = weakSelf;
     if (strongSelf) {
-      [strongSelf
-       finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
-                                           code:GRPCErrorCodeUnavailable
-                                       userInfo:@{
-                                                  NSLocalizedDescriptionKey :
-                                                    @"Connectivity lost."
-                                                  }]];
+      [strongSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
+                                                      code:GRPCErrorCodeUnavailable
+                                                  userInfo:@{ NSLocalizedDescriptionKey : @"Connectivity lost." }]];
     }
   };
   [_connectivityMonitor handleLossWithHandler:handler
-                      wifiStatusChangeHandler:^{
-                      }];
+                      wifiStatusChangeHandler:nil];
 }
 
 - (void)setState:(GRXWriterState)newState {
   @synchronized(self) {
     // Manual transitions are only allowed from the started or paused states.
-    if (_state == GRXWriterStateNotStarted ||
-        _state == GRXWriterStateFinished) {
+    if (_state == GRXWriterStateNotStarted || _state == GRXWriterStateFinished) {
       return;
     }
 
diff --git a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
index c0bbf22c74..fe3b8f39d1 100644
--- a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
+++ b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
@@ -34,19 +34,18 @@
 #import <Foundation/Foundation.h>
 #include <grpc/grpc.h>
 
-typedef void (^GRPCQueueCompletionHandler)(bool success);
+typedef void(^GRPCQueueCompletionHandler)(bool success);
 
 /**
- * This class lets one more easily use |grpc_completion_queue|. To use it, pass
- * the value of the |unmanagedQueue| property of an instance of this class to
- * |grpc_channel_create_call|. Then for every |grpc_call_*| method that accepts
- * a tag, you can pass a block of type |GRPCQueueCompletionHandler| (remembering
- * to cast it using |__bridge_retained|). The block is guaranteed to eventually
- * be called, by a concurrent queue, and then released. Each such block is
+ * This class lets one more easily use |grpc_completion_queue|. To use it, pass the value of the
+ * |unmanagedQueue| property of an instance of this class to |grpc_channel_create_call|. Then for
+ * every |grpc_call_*| method that accepts a tag, you can pass a block of type
+ * |GRPCQueueCompletionHandler| (remembering to cast it using |__bridge_retained|). The block is
+ * guaranteed to eventually be called, by a concurrent queue, and then released. Each such block is
  * passed a |bool| that tells if the operation was successful.
  *
- * Release the GRPCCompletionQueue object only after you are not going to pass
- * any more blocks to the |grpc_call| that's using it.
+ * Release the GRPCCompletionQueue object only after you are not going to pass any more blocks to
+ * the |grpc_call| that's using it.
  */
 @interface GRPCCompletionQueue : NSObject
 @property(nonatomic, readonly) grpc_completion_queue *unmanagedQueue;
diff --git a/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.h b/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.h
index 941b596d2c..e341b6ef6c 100644
--- a/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.h
+++ b/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.h
@@ -45,7 +45,7 @@
 
  */
 #define GRPC_XMACRO_ITEM(methodName, FlagName) \
-  @property(nonatomic, readonly) BOOL methodName;
+@property(nonatomic, readonly) BOOL methodName;
 
 #include "GRPCReachabilityFlagNames.xmacro.h"
 #undef GRPC_XMACRO_ITEM
@@ -60,19 +60,18 @@
 - (nonnull instancetype)init NS_UNAVAILABLE;
 
 /**
- * Queue on which callbacks will be dispatched. Default is the main queue. Set
- * it before calling handleLossWithHandler:.
+ * Queue on which callbacks will be dispatched. Default is the main queue. Set it before calling
+ * handleLossWithHandler:.
  */
 // TODO(jcanizales): Default to a serial background queue instead.
 @property(nonatomic, strong, null_resettable) dispatch_queue_t queue;
 
 /**
- * Calls handler every time the connectivity to this instance's host is lost. If
- * this instance is released before that happens, the handler won't be called.
- * Only one handler is active at a time, so if this method is called again
- * before the previous handler has been called, it might never be called at all
- * (or yes, if it has already been queued).
+ * Calls handler every time the connectivity to this instance's host is lost. If this instance is
+ * released before that happens, the handler won't be called.
+ * Only one handler is active at a time, so if this method is called again before the previous
+ * handler has been called, it might never be called at all (or yes, if it has already been queued).
  */
-- (void)handleLossWithHandler:(nonnull void (^)())handler
-      wifiStatusChangeHandler:(nonnull void (^)())wifiStatusChangeHandler;
+- (void)handleLossWithHandler:(nullable void (^)())lossHandler
+      wifiStatusChangeHandler:(nullable void (^)())wifiStatusChangeHandler;
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.m b/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.m
index fec6391d39..40afca2d3d 100644
--- a/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.m
+++ b/src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.m
@@ -58,20 +58,19 @@
 }
 
  */
-#define GRPC_XMACRO_ITEM(methodName, FlagName)                 \
-  -(BOOL)methodName {                                          \
-    return !!(_flags & kSCNetworkReachabilityFlags##FlagName); \
-  }
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+- (BOOL)methodName { \
+  return !!(_flags & kSCNetworkReachabilityFlags ## FlagName); \
+}
 #include "GRPCReachabilityFlagNames.xmacro.h"
 #undef GRPC_XMACRO_ITEM
 
 - (BOOL)isHostReachable {
-  // Note: connectionOnDemand means it'll be reachable only if using the
-  // CFSocketStream API or APIs on top of it.
-  // connectionRequired means we can't tell until a connection is attempted
-  // (e.g. for VPN on demand).
-  return self.reachable && !self.interventionRequired &&
-         !self.connectionOnDemand;
+  // Note: connectionOnDemand means it'll be reachable only if using the CFSocketStream API or APIs
+  // on top of it.
+  // connectionRequired means we can't tell until a connection is attempted (e.g. for VPN on
+  // demand).
+  return self.reachable && !self.interventionRequired && !self.connectionOnDemand;
 }
 
 - (NSString *)description {
@@ -80,9 +79,9 @@
   /*
    * For each flag, add its name to the array if it's ON. Example:
 
-     if (self.isCell) {
-       [activeOptions addObject:@"isCell"];
-     }
+  if (self.isCell) {
+    [activeOptions addObject:@"isCell"];
+  }
 
    */
   #define GRPC_XMACRO_ITEM(methodName, FlagName) \
@@ -92,14 +91,12 @@
   #include "GRPCReachabilityFlagNames.xmacro.h"
   #undef GRPC_XMACRO_ITEM
 
-  return activeOptions.count == 0
-             ? @"(none)"
-             : [activeOptions componentsJoinedByString:@", "];
+  return activeOptions.count == 0 ? @"(none)" : [activeOptions componentsJoinedByString:@", "];
 }
 
 - (BOOL)isEqual:(id)object {
   return [object isKindOfClass:[GRPCReachabilityFlags class]] &&
-         _flags == ((GRPCReachabilityFlags *)object)->_flags;
+      _flags == ((GRPCReachabilityFlags *)object)->_flags;
 }
 
 - (NSUInteger)hash {
@@ -109,16 +106,15 @@
 
 #pragma mark Connectivity Monitor
 
-// Assumes the third argument is a block that accepts a GRPCReachabilityFlags
-// object, and passes the received ones to it.
+// Assumes the third argument is a block that accepts a GRPCReachabilityFlags object, and passes the
+// received ones to it.
 static void PassFlagsToContextInfoBlock(SCNetworkReachabilityRef target,
                                         SCNetworkReachabilityFlags flags,
                                         void *info) {
-#pragma unused(target)
-  // This can be called many times with the same info. The info is retained by
-  // SCNetworkReachability while this function is being executed.
-  void (^handler)(GRPCReachabilityFlags *) =
-      (__bridge void (^)(GRPCReachabilityFlags *))info;
+  #pragma unused (target)
+  // This can be called many times with the same info. The info is retained by SCNetworkReachability
+  // while this function is being executed.
+  void (^handler)(GRPCReachabilityFlags *) = (__bridge void (^)(GRPCReachabilityFlags *))info;
   handler([[GRPCReachabilityFlags alloc] initWithFlags:flags]);
 }
 
@@ -127,8 +123,7 @@ static void PassFlagsToContextInfoBlock(SCNetworkReachabilityRef target,
   GRPCReachabilityFlags *_previousReachabilityFlags;
 }
 
-- (nullable instancetype)initWithReachability:
-    (nullable SCNetworkReachabilityRef)reachability {
+- (nullable instancetype)initWithReachability:(nullable SCNetworkReachabilityRef)reachability {
   if (!reachability) {
     return nil;
   }
@@ -149,23 +144,23 @@ static void PassFlagsToContextInfoBlock(SCNetworkReachabilityRef target,
   SCNetworkReachabilityRef reachability =
       SCNetworkReachabilityCreateWithName(NULL, hostName);
 
-  GRPCConnectivityMonitor *returnValue =
-      [[self alloc] initWithReachability:reachability];
+  GRPCConnectivityMonitor *returnValue = [[self alloc] initWithReachability:reachability];
   if (reachability) {
     CFRelease(reachability);
   }
   return returnValue;
 }
 
-- (void)handleLossWithHandler:(void (^)())handler
-      wifiStatusChangeHandler:(nonnull void (^)())wifiStatusChangeHandler {
+- (void)handleLossWithHandler:(nullable void (^)())lossHandler
+      wifiStatusChangeHandler:(nullable void (^)())wifiStatusChangeHandler {
   __weak typeof(self) weakSelf = self;
   [self startListeningWithHandler:^(GRPCReachabilityFlags *flags) {
     typeof(self) strongSelf = weakSelf;
     if (strongSelf) {
-      if (!flags.reachable) {
-        handler();
-      } else if (strongSelf->_previousReachabilityFlags &&
+      if (lossHandler && !flags.reachable) {
+        lossHandler();
+      } else if (wifiStatusChangeHandler &&
+                 strongSelf->_previousReachabilityFlags &&
                  (flags.isWWAN ^
                   strongSelf->_previousReachabilityFlags.isWWAN)) {
         wifiStatusChangeHandler();
@@ -176,19 +171,17 @@ static void PassFlagsToContextInfoBlock(SCNetworkReachabilityRef target,
 }
 
 - (void)startListeningWithHandler:(void (^)(GRPCReachabilityFlags *))handler {
-  // Copy to ensure the handler block is in the heap (and so can't be
-  // deallocated when this method returns).
+  // Copy to ensure the handler block is in the heap (and so can't be deallocated when this method
+  // returns).
   void (^copiedHandler)(GRPCReachabilityFlags *) = [handler copy];
   SCNetworkReachabilityContext context = {
-      .version = 0,
-      .info = (__bridge void *)copiedHandler,
-      .retain = CFRetain,
-      .release = CFRelease,
+    .version = 0,
+    .info = (__bridge void *)copiedHandler,
+    .retain = CFRetain,
+    .release = CFRelease,
   };
-  // The following will retain context.info, and release it when the callback is
-  // set to NULL.
-  SCNetworkReachabilitySetCallback(_reachabilityRef,
-                                   PassFlagsToContextInfoBlock, &context);
+  // The following will retain context.info, and release it when the callback is set to NULL.
+  SCNetworkReachabilitySetCallback(_reachabilityRef, PassFlagsToContextInfoBlock, &context);
   SCNetworkReachabilitySetDispatchQueue(_reachabilityRef, _queue);
 }
 
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.m b/src/objective-c/GRPCClient/private/GRPCHost.m
index 0524472f53..450bec36e0 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.m
+++ b/src/objective-c/GRPCClient/private/GRPCHost.m
@@ -33,9 +33,9 @@
 
 #import "GRPCHost.h"
 
-#import <GRPCClient/GRPCCall.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
+#import <GRPCClient/GRPCCall.h>
 #ifdef GRPC_COMPILE_WITH_CRONET
 #import <GRPCClient/GRPCCall+ChannelArg.h>
 #import <GRPCClient/GRPCCall+Cronet.h>
@@ -48,10 +48,9 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-// TODO(jcanizales): Generate the version in a standalone header, from
-// templates. Like
+// TODO(jcanizales): Generate the version in a standalone header, from templates. Like
 // templates/src/core/surface/version.c.template .
-#define GRPC_OBJC_VERSION_STRING @"1.0.0"
+#define GRPC_OBJC_VERSION_STRING @"1.0.2"
 
 static NSMutableDictionary *kHostCache;
 
@@ -62,8 +61,7 @@ static NSMutableDictionary *kHostCache;
 static GRPCConnectivityMonitor *connectivityMonitor = nil;
 
 @implementation GRPCHost {
-  // TODO(mlumish): Investigate whether caching channels with strong links is a
-  // good idea.
+  // TODO(mlumish): Investigate whether caching channels with strong links is a good idea.
   GRPCChannel *_channel;
 }
 
@@ -83,13 +81,11 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
     return nil;
   }
 
-  // To provide a default port, we try to interpret the address. If it's just a
-  // host name without scheme and without port, we'll use port 443. If it has a
-  // scheme, we pass it untouched to the C gRPC library.
-  // TODO(jcanizales): Add unit tests for the types of addresses we want to let
-  // pass untouched.
-  NSURL *hostURL =
-      [NSURL URLWithString:[@"https://" stringByAppendingString:address]];
+  // To provide a default port, we try to interpret the address. If it's just a host name without
+  // scheme and without port, we'll use port 443. If it has a scheme, we pass it untouched to the C
+  // gRPC library.
+  // TODO(jcanizales): Add unit tests for the types of addresses we want to let pass untouched.
+  NSURL *hostURL = [NSURL URLWithString:[@"https://" stringByAppendingString:address]];
   if (hostURL.host && !hostURL.port) {
     address = [hostURL.host stringByAppendingString:@":443"];
   }
@@ -99,7 +95,6 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
   dispatch_once(&cacheInitialization, ^{
     kHostCache = [NSMutableDictionary dictionary];
   });
-
   @synchronized(kHostCache) {
     GRPCHost *cachedHost = kHostCache[address];
     if (cachedHost) {
@@ -137,7 +132,7 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
 }
 
 + (void)resetAllHostSettings {
-  @synchronized(kHostCache) {
+  @synchronized (kHostCache) {
     kHostCache = [NSMutableDictionary dictionary];
   }
 }
@@ -163,19 +158,16 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
   static NSError *kDefaultRootsError;
   static dispatch_once_t loading;
   dispatch_once(&loading, ^{
-    NSString *defaultPath = @"gRPCCertificates.bundle/roots";  // .pem
-    // Do not use NSBundle.mainBundle, as it's nil for tests of library
-    // projects.
+    NSString *defaultPath = @"gRPCCertificates.bundle/roots"; // .pem
+    // Do not use NSBundle.mainBundle, as it's nil for tests of library projects.
     NSBundle *bundle = [NSBundle bundleForClass:self.class];
     NSString *path = [bundle pathForResource:defaultPath ofType:@"pem"];
     NSError *error;
-    // Files in PEM format can have non-ASCII characters in their comments (e.g.
-    // for the name of the issuer). Load them as UTF8 and produce an ASCII
-    // equivalent.
-    NSString *contentInUTF8 =
-        [NSString stringWithContentsOfFile:path
-                                  encoding:NSUTF8StringEncoding
-                                     error:&error];
+    // Files in PEM format can have non-ASCII characters in their comments (e.g. for the name of the
+    // issuer). Load them as UTF8 and produce an ASCII equivalent.
+    NSString *contentInUTF8 = [NSString stringWithContentsOfFile:path
+                                                        encoding:NSUTF8StringEncoding
+                                                           error:&error];
     if (contentInUTF8 == nil) {
       kDefaultRootsError = error;
       return;
@@ -193,15 +185,11 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
       if (errorPtr) {
         *errorPtr = kDefaultRootsError;
       }
-      NSAssert(kDefaultRootsASCII,
-               @"Could not read gRPCCertificates.bundle/roots.pem. This file, "
-                "with the root certificates, is needed to establish secure "
-                "(TLS) connections. "
-                "Because the file is distributed with the gRPC library, this "
-                "error is usually a sign "
-                "that the library wasn't configured correctly for your "
-                "project. Error: %@",
-               kDefaultRootsError);
+      NSAssert(kDefaultRootsASCII, @"Could not read gRPCCertificates.bundle/roots.pem. This file, "
+               "with the root certificates, is needed to establish secure (TLS) connections. "
+               "Because the file is distributed with the gRPC library, this error is usually a sign "
+               "that the library wasn't configured correctly for your project. Error: %@",
+                kDefaultRootsError);
       return NO;
     }
     rootsASCII = kDefaultRootsASCII;
@@ -212,12 +200,10 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
     creds = grpc_ssl_credentials_create(rootsASCII.bytes, NULL, NULL);
   } else {
     grpc_ssl_pem_key_cert_pair key_cert_pair;
-    NSData *privateKeyASCII =
-        [pemPrivateKey dataUsingEncoding:NSASCIIStringEncoding
-                    allowLossyConversion:YES];
-    NSData *certChainASCII =
-        [pemCertChain dataUsingEncoding:NSASCIIStringEncoding
-                   allowLossyConversion:YES];
+    NSData *privateKeyASCII = [pemPrivateKey dataUsingEncoding:NSASCIIStringEncoding
+                                       allowLossyConversion:YES];
+    NSData *certChainASCII = [pemCertChain dataUsingEncoding:NSASCIIStringEncoding
+                                     allowLossyConversion:YES];
     key_cert_pair.private_key = privateKeyASCII.bytes;
     key_cert_pair.cert_chain = certChainASCII.bytes;
     creds = grpc_ssl_credentials_create(rootsASCII.bytes, &key_cert_pair, NULL);
@@ -237,8 +223,7 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
   NSMutableDictionary *args = [NSMutableDictionary dictionary];
 
   // TODO(jcanizales): Add OS and device information (see
-  // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#user-agents
-  // ).
+  // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#user-agents ).
   NSString *userAgent = @"grpc-objc/" GRPC_OBJC_VERSION_STRING;
   if (_userAgentPrefix) {
     userAgent = [_userAgentPrefix stringByAppendingFormat:@" %@", userAgent];
@@ -252,7 +237,7 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
   if (_responseSizeLimitOverride) {
     args[@GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH] = _responseSizeLimitOverride;
   }
-  // Use 10000ms initial backoff time for correct behavior on bad/slow networks
+  // Use 10000ms initial backoff time for correct behavior on bad/slow networks  
   args[@GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS] = @10000;
   return args;
 }
@@ -266,15 +251,12 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
     GRPCChannel *channel;
     @synchronized(self) {
       if (_channelCreds == nil) {
-        [self setTLSPEMRootCerts:nil
-                  withPrivateKey:nil
-                   withCertChain:nil
-                           error:nil];
+        [self setTLSPEMRootCerts:nil withPrivateKey:nil withCertChain:nil error:nil];
       }
 #ifdef GRPC_COMPILE_WITH_CRONET
       if (useCronet) {
-        channel =
-            [GRPCChannel secureCronetChannelWithHost:_address channelArgs:args];
+        channel = [GRPCChannel secureCronetChannelWithHost:_address
+                                               channelArgs:args];
       } else
 #endif
       {
@@ -290,8 +272,7 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
 }
 
 - (NSString *)hostName {
-  // TODO(jcanizales): Default to nil instead of _address when Issue #2635 is
-  // clarified.
+  // TODO(jcanizales): Default to nil instead of _address when Issue #2635 is clarified.
   return _hostNameOverride ?: _address;
 }
 
diff --git a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
index 58c6032e80..c6a03c145e 100644
--- a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
+++ b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
@@ -38,10 +38,9 @@
 #import "NSDictionary+GRPC.h"
 
 // Used by the setter.
-static void CheckIsNonNilASCII(NSString *name, NSString *value) {
+static void CheckIsNonNilASCII(NSString *name, NSString* value) {
   if (!value) {
-    [NSException raise:NSInvalidArgumentException
-                format:@"%@ cannot be nil", name];
+    [NSException raise:NSInvalidArgumentException format:@"%@ cannot be nil", name];
   }
   if (![value canBeConvertedToEncoding:NSASCIIStringEncoding]) {
     [NSException raise:NSInvalidArgumentException
@@ -53,20 +52,15 @@ static void CheckIsNonNilASCII(NSString *name, NSString *value) {
 static void CheckKeyValuePairIsValid(NSString *key, id value) {
   if ([key hasSuffix:@"-bin"]) {
     if (![value isKindOfClass:NSData.class]) {
-      [NSException
-           raise:NSInvalidArgumentException
-          format:@"Expected NSData value for header %@ ending in \"-bin\", "
-                 @"instead got %@",
-                 key, value];
+      [NSException raise:NSInvalidArgumentException
+                  format:@"Expected NSData value for header %@ ending in \"-bin\", "
+       @"instead got %@", key, value];
     }
   } else {
     if (![value isKindOfClass:NSString.class]) {
-      [NSException
-           raise:NSInvalidArgumentException
-          format:
-              @"Expected NSString value for header %@ not ending in \"-bin\", "
-              @"instead got %@",
-              key, value];
+      [NSException raise:NSInvalidArgumentException
+                  format:@"Expected NSString value for header %@ not ending in \"-bin\", "
+       @"instead got %@", key, value];
     }
     CheckIsNonNilASCII(@"Text header value", (NSString *)value);
   }
@@ -74,10 +68,9 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
 
 @implementation GRPCRequestHeaders {
   __weak GRPCCall *_call;
-  // The NSMutableDictionary superclass doesn't hold any storage (so that people
-  // can implement their own in subclasses). As that's not the reason we're
-  // subclassing, we just delegate storage to the default NSMutableDictionary
-  // subclass returned by the cluster (e.g. __NSDictionaryM on iOS 9).
+  // The NSMutableDictionary superclass doesn't hold any storage (so that people can implement their
+  // own in subclasses). As that's not the reason we're subclassing, we just delegate storage to the
+  // default NSMutableDictionary subclass returned by the cluster (e.g. __NSDictionaryM on iOS 9).
   NSMutableDictionary *_delegate;
 }
 
@@ -98,8 +91,7 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
 }
 
 // Designated initializer
-- (instancetype)initWithCall:(GRPCCall *)call
-                     storage:(NSMutableDictionary *)storage {
+- (instancetype)initWithCall:(GRPCCall *)call storage:(NSMutableDictionary *)storage {
   // TODO(jcanizales): Throw if call or storage are nil.
   if ((self = [super init])) {
     _call = call;
@@ -108,10 +100,9 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
   return self;
 }
 
-- (instancetype)
-initWithObjects:(const id _Nonnull __unsafe_unretained *)objects
-        forKeys:(const id<NSCopying> _Nonnull __unsafe_unretained *)keys
-          count:(NSUInteger)cnt {
+- (instancetype)initWithObjects:(const id  _Nonnull __unsafe_unretained *)objects
+                        forKeys:(const id<NSCopying>  _Nonnull __unsafe_unretained *)keys
+                          count:(NSUInteger)cnt {
   return [self init];
 }
 
@@ -143,7 +134,7 @@ initWithObjects:(const id _Nonnull __unsafe_unretained *)objects
   return _delegate.count;
 }
 
-- (NSEnumerator *_Nonnull)keyEnumerator {
+- (NSEnumerator * _Nonnull)keyEnumerator {
   return [_delegate keyEnumerator];
 }
 
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index bbda9f2f64..38fcae0299 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -34,27 +34,27 @@
 #import "GRPCWrappedCall.h"
 
 #import <Foundation/Foundation.h>
-#include <grpc/byte_buffer.h>
 #include <grpc/grpc.h>
+#include <grpc/byte_buffer.h>
 #include <grpc/support/alloc.h>
 
 #import "GRPCCompletionQueue.h"
 #import "GRPCHost.h"
-#import "NSData+GRPC.h"
 #import "NSDictionary+GRPC.h"
+#import "NSData+GRPC.h"
 #import "NSError+GRPC.h"
 
 @implementation GRPCOperation {
- @protected
-  // Most operation subclasses don't set any flags in the grpc_op, and rely on
-  // the flag member being initialized to zero.
+@protected
+  // Most operation subclasses don't set any flags in the grpc_op, and rely on the flag member being
+  // initialized to zero.
   grpc_op _op;
-  void (^_handler)();
+  void(^_handler)();
 }
 
 - (void)finish {
   if (_handler) {
-    void (^handler)() = _handler;
+    void(^handler)() = _handler;
     _handler = nil;
     handler();
   }
@@ -101,8 +101,7 @@
 
 - (instancetype)initWithMessage:(NSData *)message handler:(void (^)())handler {
   if (!message) {
-    [NSException raise:NSInvalidArgumentException
-                format:@"message cannot be nil"];
+    [NSException raise:NSInvalidArgumentException format:@"message cannot be nil"];
   }
   if (self = [super init]) {
     _op.op = GRPC_OP_SEND_MESSAGE;
@@ -113,7 +112,7 @@
 }
 
 - (void)dealloc {
-  gpr_free(_op.data.send_message);
+  grpc_byte_buffer_destroy(_op.data.send_message);
 }
 
 @end
@@ -138,11 +137,11 @@
   grpc_metadata_array _headers;
 }
 
-- (instancetype)init {
+- (instancetype) init {
   return [self initWithHandler:nil];
 }
 
-- (instancetype)initWithHandler:(void (^)(NSDictionary *))handler {
+- (instancetype) initWithHandler:(void (^)(NSDictionary *))handler {
   if (self = [super init]) {
     _op.op = GRPC_OP_RECV_INITIAL_METADATA;
     grpc_metadata_array_init(&_headers);
@@ -153,7 +152,7 @@
       _handler = ^{
         __strong typeof(self) strongSelf = weakSelf;
         NSDictionary *metadata = [NSDictionary
-            grpc_dictionaryFromMetadataArray:strongSelf->_headers];
+                                  grpc_dictionaryFromMetadataArray:strongSelf->_headers];
         handler(metadata);
       };
     }
@@ -167,7 +166,7 @@
 
 @end
 
-@implementation GRPCOpRecvMessage {
+@implementation GRPCOpRecvMessage{
   grpc_byte_buffer *_receivedMessage;
 }
 
@@ -193,18 +192,18 @@
 
 @end
 
-@implementation GRPCOpRecvStatus {
+@implementation GRPCOpRecvStatus{
   grpc_status_code _statusCode;
   char *_details;
   size_t _detailsCapacity;
   grpc_metadata_array _trailers;
 }
 
-- (instancetype)init {
+- (instancetype) init {
   return [self initWithHandler:nil];
 }
 
-- (instancetype)initWithHandler:(void (^)(NSError *, NSDictionary *))handler {
+- (instancetype) initWithHandler:(void (^)(NSError *, NSDictionary *))handler {
   if (self = [super init]) {
     _op.op = GRPC_OP_RECV_STATUS_ON_CLIENT;
     _op.data.recv_status_on_client.status = &_statusCode;
@@ -217,11 +216,10 @@
       __weak typeof(self) weakSelf = self;
       _handler = ^{
         __strong typeof(self) strongSelf = weakSelf;
-        NSError *error =
-            [NSError grpc_errorFromStatusCode:strongSelf->_statusCode
-                                      details:strongSelf->_details];
+        NSError *error = [NSError grpc_errorFromStatusCode:strongSelf->_statusCode
+                                                   details:strongSelf->_details];
         NSDictionary *trailers = [NSDictionary
-            grpc_dictionaryFromMetadataArray:strongSelf->_trailers];
+                                  grpc_dictionaryFromMetadataArray:strongSelf->_trailers];
         handler(error, trailers);
       };
     }
@@ -247,21 +245,20 @@
   return [self initWithHost:nil path:nil];
 }
 
-- (instancetype)initWithHost:(NSString *)host path:(NSString *)path {
+- (instancetype)initWithHost:(NSString *)host
+                        path:(NSString *)path {
   if (!path || !host) {
     [NSException raise:NSInvalidArgumentException
                 format:@"path and host cannot be nil."];
   }
 
   if (self = [super init]) {
-    // Each completion queue consumes one thread. There's a trade to be made
-    // between creating and consuming too many threads and having contention of
-    // multiple calls in a single completion queue. Currently we use a singleton
-    // queue.
+    // Each completion queue consumes one thread. There's a trade to be made between creating and
+    // consuming too many threads and having contention of multiple calls in a single completion
+    // queue. Currently we use a singleton queue.
     _queue = [GRPCCompletionQueue completionQueue];
 
-    _call = [[GRPCHost hostWithAddress:host] unmanagedCallWithPath:path
-                                                   completionQueue:_queue];
+    _call = [[GRPCHost hostWithAddress:host] unmanagedCallWithPath:path completionQueue:_queue];
     if (_call == NULL) {
       return nil;
     }
@@ -273,35 +270,32 @@
   [self startBatchWithOperations:operations errorHandler:nil];
 }
 
-- (void)startBatchWithOperations:(NSArray *)operations
-                    errorHandler:(void (^)())errorHandler {
+- (void)startBatchWithOperations:(NSArray *)operations errorHandler:(void (^)())errorHandler {
   size_t nops = operations.count;
   grpc_op *ops_array = gpr_malloc(nops * sizeof(grpc_op));
   size_t i = 0;
   for (GRPCOperation *operation in operations) {
     ops_array[i++] = operation.op;
   }
-  grpc_call_error error = grpc_call_start_batch(
-      _call, ops_array, nops, (__bridge_retained void *)(^(bool success) {
-        if (!success) {
-          if (errorHandler) {
-            errorHandler();
-          } else {
-            return;
-          }
-        }
-        for (GRPCOperation *operation in operations) {
-          [operation finish];
-        }
-      }),
-      NULL);
+  grpc_call_error error = grpc_call_start_batch(_call, ops_array, nops,
+                                                (__bridge_retained void *)(^(bool success){
+    if (!success) {
+      if (errorHandler) {
+        errorHandler();
+      } else {
+        return;
+      }
+    }
+    for (GRPCOperation *operation in operations) {
+      [operation finish];
+    }
+  }), NULL);
   gpr_free(ops_array);
 
   if (error != GRPC_CALL_OK) {
     [NSException raise:NSInternalInconsistencyException
-                format:@"A precondition for calling grpc_call_start_batch "
-                       @"wasn't met. Error %i",
-                       error];
+                format:@"A precondition for calling grpc_call_start_batch wasn't met. Error %i",
+     error];
   }
 }
 
diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 98337799e9..6d2ad0a3bd 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -53,22 +53,22 @@ static void MallocAndCopyByteBufferToCharArray(grpc_byte_buffer *buffer,
   }
   // The slice contains uncompressed data even if compressed data was received
   // because the reader takes care of automatically decompressing it
-  gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
-  size_t uncompressed_length = GPR_SLICE_LENGTH(slice);
+  grpc_slice slice = grpc_byte_buffer_reader_readall(&reader);
+  size_t uncompressed_length = GRPC_SLICE_LENGTH(slice);
   char *result = malloc(uncompressed_length);
   if (result) {
-    memcpy(result, GPR_SLICE_START_PTR(slice), uncompressed_length);
+    memcpy(result, GRPC_SLICE_START_PTR(slice), uncompressed_length);
   }
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   *array = result;
   *length = uncompressed_length;
 }
 
 static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
                                                       size_t length) {
-  gpr_slice slice = gpr_slice_from_copied_buffer(array, length);
+  grpc_slice slice = grpc_slice_from_copied_buffer(array, length);
   grpc_byte_buffer *buffer = grpc_raw_byte_buffer_create(&slice, 1);
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   return buffer;
 }
 
@@ -97,9 +97,9 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
   // appending of byte arrays by not using internally a single contiguous memory
   // block for representation.
   // The following implementation is thus not optimal, sometimes requiring two
-  // copies (one by self.bytes and another by gpr_slice_from_copied_buffer).
+  // copies (one by self.bytes and another by grpc_slice_from_copied_buffer).
   // If it turns out to be an issue, we can use enumerateByteRangesUsingblock:
-  // to create an array of gpr_slice objects to pass to
+  // to create an array of grpc_slice objects to pass to
   // grpc_raw_byte_buffer_create.
   // That would make it do exactly one copy, always.
   return CopyCharArrayToNewByteBuffer((const char *)self.bytes,
diff --git a/src/objective-c/GRPCClient/private/NSError+GRPC.h b/src/objective-c/GRPCClient/private/NSError+GRPC.h
index a9a321470c..e0c1efc1f9 100644
--- a/src/objective-c/GRPCClient/private/NSError+GRPC.h
+++ b/src/objective-c/GRPCClient/private/NSError+GRPC.h
@@ -36,9 +36,8 @@
 
 @interface NSError (GRPC)
 /**
- * Returns nil if the status code is OK. Otherwise, a NSError whose code is one
- * of |GRPCErrorCode| and whose domain is |kGRPCErrorDomain|.
+ * Returns nil if the status code is OK. Otherwise, a NSError whose code is one of |GRPCErrorCode|
+ * and whose domain is |kGRPCErrorDomain|.
  */
-+ (instancetype)grpc_errorFromStatusCode:(grpc_status_code)statusCode
-                                 details:(char *)details;
++ (instancetype)grpc_errorFromStatusCode:(grpc_status_code)statusCode details:(char *)details;
 @end
diff --git a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m
new file mode 100644
index 0000000000..4ba7badd86
--- /dev/null
+++ b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m
@@ -0,0 +1,407 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This test file is derived from fixture h2_ssl.c in core end2end test
+ * (test/core/end2end/fixture/h2_ssl.c). The structure of the fixture is
+ * preserved as much as possible
+ *
+ * This fixture creates a server full stack using chttp2 and a client
+ * full stack using Cronet. End-to-end tests are run against this
+ * configuration
+ *
+ */
+
+#import <XCTest/XCTest.h>
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/security/credentials/credentials.h"
+#include "src/core/lib/support/env.h"
+#include "src/core/lib/support/string.h"
+#include "src/core/lib/support/tmpfile.h"
+#include "test/core/end2end/data/ssl_test_data.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+#import <Cronet/Cronet.h>
+#include <grpc/grpc_cronet.h>
+
+typedef struct fullstack_secure_fixture_data {
+  char *localaddr;
+} fullstack_secure_fixture_data;
+
+static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
+    grpc_channel_args *client_args, grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  int port = grpc_pick_unused_port_or_die();
+  fullstack_secure_fixture_data *ffd =
+      gpr_malloc(sizeof(fullstack_secure_fixture_data));
+  memset(&f, 0, sizeof(f));
+
+  gpr_join_host_port(&ffd->localaddr, "127.0.0.1", port);
+
+  f.fixture_data = ffd;
+  f.cq = grpc_completion_queue_create(NULL);
+
+  return f;
+}
+
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, NULL, 0, GRPC_STATUS_UNAUTHENTICATED, NULL);
+}
+
+static void cronet_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
+                                                grpc_channel_args *client_args,
+                                                cronet_engine *cronetEngine) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  f->client = grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr,
+                                                client_args, NULL);
+  GPR_ASSERT(f->client != NULL);
+}
+
+static void chttp2_init_server_secure_fullstack(
+    grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
+    grpc_server_credentials *server_creds) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  if (f->server) {
+    grpc_server_destroy(f->server);
+  }
+  f->server = grpc_server_create(server_args, NULL);
+  grpc_server_register_completion_queue(f->server, f->cq, NULL);
+  GPR_ASSERT(grpc_server_add_secure_http2_port(f->server, ffd->localaddr,
+                                               server_creds));
+  grpc_server_credentials_release(server_creds);
+  grpc_server_start(f->server);
+}
+
+static void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  gpr_free(ffd->localaddr);
+  gpr_free(ffd);
+}
+
+static void cronet_init_client_simple_ssl_secure_fullstack(
+    grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
+  cronet_engine *cronetEngine = [Cronet getGlobalEngine];
+
+  grpc_channel_args *new_client_args = grpc_channel_args_copy(client_args);
+  cronet_init_client_secure_fullstack(f, new_client_args, cronetEngine);
+  grpc_channel_args_destroy(new_client_args);
+}
+
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
+static void chttp2_init_server_simple_ssl_secure_fullstack(
+    grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
+  grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key,
+                                                  test_server1_cert};
+  grpc_server_credentials *ssl_creds =
+      grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0, NULL);
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
+  }
+  chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
+}
+
+/* All test configurations */
+
+static grpc_end2end_test_config configs[] = {
+    {"chttp2/simple_ssl_fullstack",
+     FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
+         FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS,
+     chttp2_create_fixture_secure_fullstack,
+     cronet_init_client_simple_ssl_secure_fullstack,
+     chttp2_init_server_simple_ssl_secure_fullstack,
+     chttp2_tear_down_secure_fullstack},
+};
+
+static char *roots_filename;
+
+@interface CoreCronetEnd2EndTests : XCTestCase
+
+@end
+
+@implementation CoreCronetEnd2EndTests
+
+// The setUp() function is run before the test cases run and only run once
++ (void)setUp {
+  [super setUp];
+
+  FILE *roots_file;
+  size_t roots_size = strlen(test_root_cert);
+
+  char *argv[] = {"CoreCronetEnd2EndTests"};
+  grpc_test_init(1, argv);
+  grpc_end2end_tests_pre_init();
+
+  /* Set the SSL roots env var. */
+  roots_file = gpr_tmpfile("chttp2_simple_ssl_fullstack_test", &roots_filename);
+  GPR_ASSERT(roots_filename != NULL);
+  GPR_ASSERT(roots_file != NULL);
+  GPR_ASSERT(fwrite(test_root_cert, 1, roots_size, roots_file) == roots_size);
+  fclose(roots_file);
+  gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, roots_filename);
+
+  grpc_init();
+
+  [Cronet setHttp2Enabled:YES];
+  [Cronet enableTestCertVerifierForTesting];
+  NSURL *url = [[[NSFileManager defaultManager]
+      URLsForDirectory:NSDocumentDirectory
+             inDomains:NSUserDomainMask] lastObject];
+  NSLog(@"Documents directory: %@", url);
+  [Cronet start];
+  [Cronet startNetLogToFile:@"Documents/cronet_netlog.json" logBytes:YES];
+}
+
+// The tearDown() function is run after all test cases finish running
++ (void)tearDown {
+  grpc_shutdown();
+
+  /* Cleanup. */
+  remove(roots_filename);
+  gpr_free(roots_filename);
+
+  [super tearDown];
+}
+
+- (void)testIndividualCase:(char *)test_case {
+  char *argv[] = {"h2_ssl", test_case};
+
+  for (int i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
+    grpc_end2end_tests(sizeof(argv) / sizeof(argv[0]), argv, configs[i]);
+  }
+}
+
+// TODO(mxyan): Use NSStringFromSelector(_cmd) to acquire test name from the
+// test case method name, so that bodies of test cases can stay identical
+- (void)testAuthorityNotSupported {
+  [self testIndividualCase:"authority_not_supported"];
+}
+
+- (void)testBadHostname {
+  [self testIndividualCase:"bad_hostname"];
+}
+
+- (void)testBinaryMetadata {
+  // NOT SUPPORTED
+  //[self testIndividualCase:"binary_metadata"];
+}
+
+- (void)testCallCreds {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"call_creds"];
+}
+
+- (void)testCancelAfterAccept {
+  [self testIndividualCase:"cancel_after_accept"];
+}
+
+- (void)testCancelAfterClientDone {
+  [self testIndividualCase:"cancel_after_client_done"];
+}
+
+- (void)testCancelAfterInvoke {
+  [self testIndividualCase:"cancel_after_invoke"];
+}
+
+- (void)testCancelBeforeInvoke {
+  [self testIndividualCase:"cancel_before_invoke"];
+}
+
+- (void)testCancelInAVacuum {
+  [self testIndividualCase:"cancel_in_a_vacuum"];
+}
+
+- (void)testCancelWithStatus {
+  [self testIndividualCase:"cancel_with_status"];
+}
+
+- (void)testCompressedPayload {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"compressed_payload"];
+}
+
+- (void)testConnectivity {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"connectivity"];
+}
+
+- (void)testDefaultHost {
+  [self testIndividualCase:"default_host"];
+}
+
+- (void)testDisappearingServer {
+  [self testIndividualCase:"disappearing_server"];
+}
+
+- (void)testEmptyBatch {
+  [self testIndividualCase:"empty_batch"];
+}
+
+- (void)testFilterCausesClose {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"filter_causes_close"];
+}
+
+- (void)testGracefulServerShutdown {
+  [self testIndividualCase:"graceful_server_shutdown"];
+}
+
+- (void)testHighInitialSeqno {
+  [self testIndividualCase:"high_initial_seqno"];
+}
+
+- (void)testHpackSize {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"hpack_size"];
+}
+
+- (void)testIdempotentRequest {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"idempotent_request"];
+}
+
+- (void)testInvokeLargeRequest {
+  // NOT SUPPORTED (frame size)
+  // [self testIndividualCase:"invoke_large_request"];
+}
+
+- (void)testLargeMetadata {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"large_metadata"];
+}
+
+- (void)testMaxConcurrentStreams {
+  [self testIndividualCase:"max_concurrent_streams"];
+}
+
+- (void)testMaxMessageLength {
+  // NOT SUPPORTED (close_error)
+  // [self testIndividualCase:"max_message_length"];
+}
+
+- (void)testNegativeDeadline {
+  [self testIndividualCase:"negative_deadline"];
+}
+
+- (void)testNetworkStatusChange {
+  [self testIndividualCase:"network_status_change"];
+}
+
+- (void)testNoOp {
+  [self testIndividualCase:"no_op"];
+}
+
+- (void)testPayload {
+  [self testIndividualCase:"payload"];
+}
+
+- (void)testPing {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"ping"];
+}
+
+- (void)testPingPongStreaming {
+  [self testIndividualCase:"ping_pong_streaming"];
+}
+
+- (void)testRegisteredCall {
+  [self testIndividualCase:"registered_call"];
+}
+
+- (void)testRequestWithFlags {
+  // NOT SUPPORTED
+  // [self testIndividualCase:"request_with_flags"];
+}
+
+- (void)testRequestWithPayload {
+  [self testIndividualCase:"request_with_payload"];
+}
+
+- (void)testServerFinishesRequest {
+  [self testIndividualCase:"server_finishes_request"];
+}
+
+- (void)testShutdownFinishesCalls {
+  [self testIndividualCase:"shutdown_finishes_calls"];
+}
+
+- (void)testShutdownFinishesTags {
+  [self testIndividualCase:"shutdown_finishes_tags"];
+}
+
+- (void)testSimpleDelayedRequest {
+  [self testIndividualCase:"simple_delayed_request"];
+}
+
+- (void)testSimpleMetadata {
+  [self testIndividualCase:"simple_metadata"];
+}
+
+- (void)testSimpleRequest {
+  [self testIndividualCase:"simple_request"];
+}
+
+- (void)testStreamingErrorResponse {
+  [self testIndividualCase:"streaming_error_response"];
+}
+
+- (void)testTrailingMetadata {
+  [self testIndividualCase:"trailing_metadata"];
+}
+
+@end
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 77640525d5..0b72a75f3d 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -43,6 +43,8 @@
 #import <RxLibrary/GRXWriteable.h>
 #import <RxLibrary/GRXWriter+Immediate.h>
 
+#define TEST_TIMEOUT 16
+
 static NSString * const kHostAddress = @"localhost:5050";
 static NSString * const kPackage = @"grpc.testing";
 static NSString * const kService = @"TestService";
@@ -137,7 +139,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testEmptyRPC {
@@ -159,7 +161,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testSimpleProtoRPC {
@@ -191,7 +193,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testMetadata {
@@ -225,7 +227,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testResponseMetadataKVO {
@@ -256,7 +258,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
   
   [call startWithWriteable:responsesWriteable];
   
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testUserAgentPrefix {
@@ -287,7 +289,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 // TODO(makarandd): Move to a different file that contains only unit tests
@@ -347,7 +349,7 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 @end
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 9804734d6a..c3935ce1e0 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -46,6 +46,8 @@
 #import <RxLibrary/GRXBufferedPipe.h>
 #import <RxLibrary/GRXWriter+Immediate.h>
 
+#define TEST_TIMEOUT 32
+
 // Convenience constructors for the generated proto messages:
 
 @interface RMTStreamingOutputCallRequest (Constructors)
@@ -124,7 +126,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testLargeUnaryRPC {
@@ -147,7 +149,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:16 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)test4MBResponsesAreAccepted {
@@ -164,7 +166,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:16 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testResponsesOverMaxSizeFailWithActionableMessage {
@@ -185,7 +187,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:16 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testResponsesOver4MBAreAcceptedIfOptedIn {
@@ -205,7 +207,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:16 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testClientStreamingRPC {
@@ -238,7 +240,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testServerStreamingRPC {
@@ -275,7 +277,7 @@
     }
   }];
 
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testPingPongRPC {
@@ -319,7 +321,7 @@
       [expectation fulfill];
     }
   }];
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 #ifndef GRPC_COMPILE_WITH_CRONET
@@ -335,7 +337,7 @@
     XCTAssert(done, @"Unexpected response: %@", response);
     [expectation fulfill];
   }];
-  [self waitForExpectationsWithTimeout:2 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 #endif
 
@@ -361,7 +363,7 @@
   [call cancel];
   XCTAssertEqual(call.state, GRXWriterStateFinished);
 
-  [self waitForExpectationsWithTimeout:1 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testCancelAfterFirstResponseRPC {
@@ -396,7 +398,7 @@
     }
   }];
   [call start];
-  [self waitForExpectationsWithTimeout:8 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 - (void)testRPCAfterClosingOpenConnections {
@@ -420,7 +422,7 @@
     }];
   }];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
 @end
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index 17478fab12..5785b976f2 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -84,9 +84,9 @@ post_install do |installer|
     end
 
     # CocoaPods creates duplicated library targets of gRPC-Core when the test targets include
-    # non-default subspecs of gRPC-Core. All of these library targets start with prefix 'gRPC-Core.'
+    # non-default subspecs of gRPC-Core. All of these library targets start with prefix 'gRPC-Core'
     # and require the same error suppresion.
-    if target.name == 'gRPC-Core' or target.name.start_with?('gRPC-Core.') 
+    if target.name.start_with?('gRPC-Core')
       target.build_configurations.each do |config|
         # TODO(zyc): Remove this setting after the issue is resolved
         # GPR_UNREACHABLE_CODE causes "Control may reach end of non-void
diff --git a/src/php/ext/grpc/byte_buffer.c b/src/php/ext/grpc/byte_buffer.c
index 3be1429f13..b0269854e8 100644
--- a/src/php/ext/grpc/byte_buffer.c
+++ b/src/php/ext/grpc/byte_buffer.c
@@ -47,12 +47,12 @@
 
 #include <grpc/grpc.h>
 #include <grpc/byte_buffer_reader.h>
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 
 grpc_byte_buffer *string_to_byte_buffer(char *string, size_t length) {
-  gpr_slice slice = gpr_slice_from_copied_buffer(string, length);
+  grpc_slice slice = grpc_slice_from_copied_buffer(string, length);
   grpc_byte_buffer *buffer = grpc_raw_byte_buffer_create(&slice, 1);
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   return buffer;
 }
 
@@ -66,11 +66,11 @@ void byte_buffer_to_string(grpc_byte_buffer *buffer, char **out_string,
     return;
   }
 
-  gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
-  size_t length = GPR_SLICE_LENGTH(slice);
+  grpc_slice slice = grpc_byte_buffer_reader_readall(&reader);
+  size_t length = GRPC_SLICE_LENGTH(slice);
   char *string = ecalloc(length + 1, sizeof(char));
-  memcpy(string, GPR_SLICE_START_PTR(slice), length);
-  gpr_slice_unref(slice);
+  memcpy(string, GRPC_SLICE_START_PTR(slice), length);
+  grpc_slice_unref(slice);
 
   *out_string = string;
   *out_length = length;
diff --git a/src/php/lib/Grpc/AbstractCall.php b/src/php/lib/Grpc/AbstractCall.php
index e24be3fc76..c4d56790f7 100644
--- a/src/php/lib/Grpc/AbstractCall.php
+++ b/src/php/lib/Grpc/AbstractCall.php
@@ -35,7 +35,7 @@
 namespace Grpc;
 
 /**
- * Class AbstractCall
+ * Class AbstractCall.
  * @package Grpc
  */
 abstract class AbstractCall
@@ -121,13 +121,14 @@ abstract class AbstractCall
     }
 
     /**
-     * Serialize a message to the protobuf binary format
+     * Serialize a message to the protobuf binary format.
      *
      * @param mixed $data The Protobuf message
      *
      * @return string The protobuf binary format
      */
-    protected function serializeMessage($data) {
+    protected function serializeMessage($data)
+    {
         // Proto3 implementation
         if (method_exists($data, 'encode')) {
             return $data->encode();
@@ -155,6 +156,7 @@ abstract class AbstractCall
             list($className, $deserializeFunc) = $this->deserialize;
             $obj = new $className();
             $obj->$deserializeFunc($value);
+
             return $obj;
         }
 
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index 8a7f6572a6..d0baeae955 100644
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -116,7 +116,7 @@ class BaseStub
     }
 
     /**
-     * @param $timeout in microseconds
+     * @param int $timeout in microseconds
      *
      * @return bool true if channel is ready
      * @throw Exception if channel is in FATAL_ERROR state
@@ -189,7 +189,7 @@ class BaseStub
     /**
      * validate and normalize the metadata array.
      *
-     * @param $metadata The metadata map
+     * @param array $metadata The metadata map
      *
      * @return $metadata Validated and key-normalized metadata map
      * @throw InvalidArgumentException if key contains invalid characters
@@ -216,8 +216,8 @@ class BaseStub
      * Call a remote method that takes a single argument and has a
      * single output.
      *
-     * @param string $method The name of the method to call
-     * @param $argument The argument to the method
+     * @param string   $method      The name of the method to call
+     * @param mixed    $argument    The argument to the method
      * @param callable $deserialize A function that deserializes the response
      * @param array    $metadata    A metadata map to send to the server
      *
@@ -250,9 +250,9 @@ class BaseStub
      * Call a remote method that takes a stream of arguments and has a single
      * output.
      *
-     * @param string $method The name of the method to call
-     * @param $arguments An array or Traversable of arguments to stream to the
-     *     server
+     * @param string   $method      The name of the method to call
+     * @param array    $arguments   An array or Traversable of arguments to stream to the
+     *                              server
      * @param callable $deserialize A function that deserializes the response
      * @param array    $metadata    A metadata map to send to the server
      *
@@ -284,8 +284,8 @@ class BaseStub
      * Call a remote method that takes a single argument and returns a stream of
      * responses.
      *
-     * @param string $method The name of the method to call
-     * @param $argument The argument to the method
+     * @param string   $method      The name of the method to call
+     * @param mixed    $argument    The argument to the method
      * @param callable $deserialize A function that deserializes the responses
      * @param array    $metadata    A metadata map to send to the server
      *
diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index 3d62e86ab0..d201915d66 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -477,10 +477,10 @@ function statusCodeAndMessage($stub)
     list($result, $status) = $call->wait();
 
     hardAssert($status->code === 2,
-               'Received unexpected UnaryCall status code: ' .
+               'Received unexpected UnaryCall status code: '.
                $status->code);
     hardAssert($status->details === 'test status message',
-               'Received unexpected UnaryCall status details: ' .
+               'Received unexpected UnaryCall status details: '.
                $status->details);
 
     $streaming_call = $stub->FullDuplexCall();
@@ -493,10 +493,10 @@ function statusCodeAndMessage($stub)
 
     $status = $streaming_call->getStatus();
     hardAssert($status->code === 2,
-               'Received unexpected FullDuplexCall status code: ' .
+               'Received unexpected FullDuplexCall status code: '.
                $status->code);
     hardAssert($status->details === 'test status message',
-               'Received unexpected FullDuplexCall status details: ' .
+               'Received unexpected FullDuplexCall status details: '.
                $status->details);
 }
 
diff --git a/src/php/tests/unit_tests/CallTest.php b/src/php/tests/unit_tests/CallTest.php
index 1205f0cd8e..f60eb96730 100644
--- a/src/php/tests/unit_tests/CallTest.php
+++ b/src/php/tests/unit_tests/CallTest.php
@@ -94,7 +94,7 @@ class CallTest extends PHPUnit_Framework_TestCase
         $batch = [
             Grpc\OP_SEND_INITIAL_METADATA => ['key1' => ['value1'],
                                               'key2' => ['value2',
-                                                         'value3'], ],
+                                                         'value3', ], ],
         ];
         $result = $this->call->startBatch($batch);
         $this->assertTrue($result->send_metadata);
diff --git a/src/php/tests/unit_tests/ChannelTest.php b/src/php/tests/unit_tests/ChannelTest.php
index 4b35b1a28c..fa33d38911 100644
--- a/src/php/tests/unit_tests/ChannelTest.php
+++ b/src/php/tests/unit_tests/ChannelTest.php
@@ -99,7 +99,7 @@ class ChannelTest extends PHPUnit_Framework_TestCase
         $this->channel = new Grpc\Channel('localhost:0',
              ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
         $time = new Grpc\Timeval(1000);
-        $state = $this->channel->watchConnectivityState(123, $time);
+        $state = $this->channel->watchConnectivityState(1, $time);
         $this->assertTrue($state);
         unset($time);
     }
diff --git a/src/php/tests/unit_tests/ServerTest.php b/src/php/tests/unit_tests/ServerTest.php
index f2346ab113..5f40202f18 100644
--- a/src/php/tests/unit_tests/ServerTest.php
+++ b/src/php/tests/unit_tests/ServerTest.php
@@ -67,9 +67,9 @@ class ServerTest extends PHPUnit_Framework_TestCase
     public function testRequestCall()
     {
         $this->server = new Grpc\Server();
-        $port = $this->server->addHttp2Port('0.0.0.0:8888');
+        $port = $this->server->addHttp2Port('0.0.0.0:0');
         $this->server->start();
-        $channel = new Grpc\Channel('localhost:8888',
+        $channel = new Grpc\Channel('localhost:' . $port,
              ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
 
         $deadline = Grpc\Timeval::infFuture();
diff --git a/src/proto/grpc/lb/v1/load_balancer.options b/src/proto/grpc/lb/v1/load_balancer.options
index a9398d5f47..7fbd44b9de 100644
--- a/src/proto/grpc/lb/v1/load_balancer.options
+++ b/src/proto/grpc/lb/v1/load_balancer.options
@@ -1,6 +1,5 @@
 grpc.lb.v1.InitialLoadBalanceRequest.name max_size:128
-grpc.lb.v1.InitialLoadBalanceResponse.client_config max_size:64
 grpc.lb.v1.InitialLoadBalanceResponse.load_balancer_delegate max_size:64
 grpc.lb.v1.Server.ip_address max_size:16
-grpc.lb.v1.Server.load_balance_token max_size:65
+grpc.lb.v1.Server.load_balance_token max_size:50
 load_balancer.proto no_unions:true
diff --git a/src/proto/grpc/lb/v1/load_balancer.proto b/src/proto/grpc/lb/v1/load_balancer.proto
index 210fba1323..44a5150a7e 100644
--- a/src/proto/grpc/lb/v1/load_balancer.proto
+++ b/src/proto/grpc/lb/v1/load_balancer.proto
@@ -63,7 +63,8 @@ message LoadBalanceRequest {
 }
 
 message InitialLoadBalanceRequest {
-  // Name of load balanced service (IE, service.grpc.gslb.google.com)
+  // Name of load balanced service (IE, service.grpc.gslb.google.com). Its
+  // length should be less than 256 bytes.
   string name = 1;
 }
 
@@ -95,7 +96,8 @@ message InitialLoadBalanceResponse {
   // This is an application layer redirect that indicates the client should use
   // the specified server for load balancing. When this field is non-empty in
   // the response, the client should open a separate connection to the
-  // load_balancer_delegate and call the BalanceLoad method.
+  // load_balancer_delegate and call the BalanceLoad method. Its length should
+  // be less than 64 bytes.
   string load_balancer_delegate = 1;
 
   // This interval defines how often the client should send the client stats
@@ -130,6 +132,8 @@ message Server {
   // frontend requests for that pick must include the token in its initial
   // metadata. The token is used by the backend to verify the request and to
   // allow the backend to report load to the gRPC LB system.
+  //
+  // Its length is variable but less than 50 bytes.
   string load_balance_token = 3;
 
   // Indicates whether this particular request should be dropped by the client
diff --git a/src/proto/grpc/reflection/v1alpha/reflection.proto b/src/proto/grpc/reflection/v1alpha/reflection.proto
index 276ff0e255..01e582cc8a 100644
--- a/src/proto/grpc/reflection/v1alpha/reflection.proto
+++ b/src/proto/grpc/reflection/v1alpha/reflection.proto
@@ -59,8 +59,8 @@ message ServerReflectionRequest {
     // message type with the given field number.
     ExtensionRequest file_containing_extension = 5;
 
-    // Finds the tag numbers used by all known extensions of extendee_type, and
-    // appends them to ExtensionNumberResponse in an undefined order.
+    // Finds the tag numbers used by all known extensions of the given message
+    // type, and appends them to ExtensionNumberResponse in an undefined order.
     // Its corresponding method is best-effort: it's not guaranteed that the
     // reflection service will implement this method, and it's not guaranteed
     // that this method will provide all extensions. Returns
diff --git a/src/proto/grpc/testing/control.proto b/src/proto/grpc/testing/control.proto
index 918f5fa3e3..be387cf786 100644
--- a/src/proto/grpc/testing/control.proto
+++ b/src/proto/grpc/testing/control.proto
@@ -219,9 +219,12 @@ message ScenarioResultSummary
   double latency_99 = 10;
   double latency_999 = 11;
 
+  // server cpu usage percentage
+  double server_cpu_usage = 12;
+
   // Number of requests that succeeded/failed
-  double successful_requests_per_second = 12;
-  double failed_requests_per_second = 13;
+  double successful_requests_per_second = 13;
+  double failed_requests_per_second = 14;
 }
 
 // Results of a single benchmark scenario.
diff --git a/src/proto/grpc/testing/proto2/empty2.proto b/src/proto/grpc/testing/proto2/empty2.proto
new file mode 100644
index 0000000000..51f0fe28b1
--- /dev/null
+++ b/src/proto/grpc/testing/proto2/empty2.proto
@@ -0,0 +1,37 @@
+
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto2";
+
+package grpc.testing.proto2;
+
+message EmptyWithExtensions {
+  extensions 100 to 999;
+}
diff --git a/src/proto/grpc/testing/proto2/empty2_extensions.proto b/src/proto/grpc/testing/proto2/empty2_extensions.proto
new file mode 100644
index 0000000000..0229fe3fbd
--- /dev/null
+++ b/src/proto/grpc/testing/proto2/empty2_extensions.proto
@@ -0,0 +1,43 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto2";
+
+import "src/proto/grpc/testing/proto2/empty2.proto";
+
+package grpc.testing.proto2;
+
+// Fill emptiness with music.
+extend grpc.testing.proto2.EmptyWithExtensions {
+  optional int64 Deadmau5 = 124;
+  optional float Madeon = 125;
+  optional string AboveAndBeyond = 126;
+  optional bool Tycho = 127;
+  optional fixed64 Pendulum = 128;
+}
diff --git a/src/proto/grpc/testing/stats.proto b/src/proto/grpc/testing/stats.proto
index d40d714801..80014161a1 100644
--- a/src/proto/grpc/testing/stats.proto
+++ b/src/proto/grpc/testing/stats.proto
@@ -41,6 +41,12 @@ message ServerStats {
   // change in server time (in seconds) used by the server process and all
   // threads since last reset
   double time_system = 3;
+
+  // change in total cpu time of the server (data from proc/stat)
+  uint64 total_cpu_time = 4;
+
+  // change in idle time of the server (data from proc/stat)
+  uint64 idle_cpu_time = 5;
 }
 
 // Histogram params based on grpc/support/histogram.c
diff --git a/src/python/.gitignore b/src/python/.gitignore
index f158efa4bf..7b520579a0 100644
--- a/src/python/.gitignore
+++ b/src/python/.gitignore
@@ -1 +1,3 @@
 gens/
+*_pb2.py
+*_pb2_grpc.py
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 526bd9e14f..e3c10156d0 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -31,6 +31,7 @@
 
 import abc
 import enum
+import sys
 
 import six
 
@@ -767,8 +768,8 @@ class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
     gRPC runtime to determine the status code of the RPC.
 
     Args:
-      code: The integer status code of the RPC to be transmitted to the
-        invocation side of the RPC.
+      code: A StatusCode value to be transmitted to the invocation side of the
+        RPC as the status code of the RPC.
     """
     raise NotImplementedError()
 
@@ -780,8 +781,8 @@ class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
     details to transmit.
 
     Args:
-      details: The details string of the RPC to be transmitted to
-        the invocation side of the RPC.
+      details: A string to be transmitted to the invocation side of the RPC as
+        the status details of the RPC.
     """
     raise NotImplementedError()
 
@@ -849,6 +850,26 @@ class GenericRpcHandler(six.with_metaclass(abc.ABCMeta)):
     raise NotImplementedError()
 
 
+class ServiceRpcHandler(six.with_metaclass(abc.ABCMeta, GenericRpcHandler)):
+  """An implementation of RPC methods belonging to a service.
+
+  A service handles RPC methods with structured names of the form
+  '/Service.Name/Service.MethodX', where 'Service.Name' is the value
+  returned by service_name(), and 'Service.MethodX' is the service method
+  name.  A service can have multiple service methods names, but only a single
+  service name.
+  """
+
+  @abc.abstractmethod
+  def service_name(self):
+    """Returns this services name.
+
+    Returns:
+      The service name.
+    """
+    raise NotImplementedError()
+
+
 #############################  Server Interface  ###############################
 
 
@@ -927,10 +948,16 @@ class Server(six.with_metaclass(abc.ABCMeta)):
     passed in a previous call will not have the effect of stopping the server
     later.
 
+    This method does not block for any significant length of time. If None is
+    passed as the grace value, existing RPCs are immediately aborted and this
+    method blocks until this Server is completely stopped.
+
     Args:
-      grace: A duration of time in seconds to allow existing RPCs to complete
-        before being aborted by this Server's stopping. If None, this method
-        will block until the server is completely stopped.
+      grace: A duration of time in seconds or None. If a duration of time in
+        seconds, the time to allow existing RPCs to complete before being
+        aborted by this Server's stopping. If None, all RPCs will be aborted
+        immediately and this method will block until this Server is completely
+        stopped.
 
     Returns:
       A threading.Event that will be set when this Server has completely
@@ -1274,6 +1301,7 @@ __all__ = (
     'RpcMethodHandler',
     'HandlerCallDetails',
     'GenericRpcHandler',
+    'ServiceRpcHandler',
     'Server',
     'unary_unary_rpc_method_handler',
     'unary_stream_rpc_method_handler',
@@ -1291,3 +1319,24 @@ __all__ = (
     'secure_channel',
     'server',
 )
+
+
+############################### Extension Shims ################################
+
+
+# Here to maintain backwards compatibility; avoid using these in new code!
+try:
+  import grpc_tools
+  sys.modules.update({'grpc.tools': grpc_tools})
+except ImportError:
+  pass
+try:
+  import grpc_health
+  sys.modules.update({'grpc.health': grpc_health})
+except ImportError:
+  pass
+try:
+  import grpc_reflection
+  sys.modules.update({'grpc.reflection': grpc_reflection})
+except ImportError:
+  pass
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index 53a26727ab..41e9163cd6 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -36,8 +36,8 @@ import time
 import grpc
 from grpc import _common
 from grpc import _grpcio_metadata
-from grpc.framework.foundation import callable_util
 from grpc._cython import cygrpc
+from grpc.framework.foundation import callable_util
 
 _USER_AGENT = 'Python-gRPC-{}'.format(_grpcio_metadata.__version__)
 
@@ -99,6 +99,22 @@ def _wait_once_until(condition, until):
     else:
       condition.wait(timeout=remaining)
 
+_INTERNAL_CALL_ERROR_MESSAGE_FORMAT = (
+    'Internal gRPC call error %d. ' +
+    'Please report to https://github.com/grpc/grpc/issues')
+
+def _check_call_error(call_error, metadata):
+  if call_error == cygrpc.CallError.invalid_metadata:
+    raise ValueError('metadata was invalid: %s' % metadata)
+  elif call_error != cygrpc.CallError.ok:
+    raise ValueError(_INTERNAL_CALL_ERROR_MESSAGE_FORMAT % call_error)
+
+def _call_error_set_RPCstate(state, call_error, metadata):
+  if call_error == cygrpc.CallError.invalid_metadata:
+    _abort(state, grpc.StatusCode.INTERNAL, 'metadata was invalid: %s' % metadata)
+  else:
+    _abort(state, grpc.StatusCode.INTERNAL, 
+        _INTERNAL_CALL_ERROR_MESSAGE_FORMAT % call_error)
 
 class _RPCState(object):
 
@@ -358,7 +374,7 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
       if self._state.callbacks is None:
         return False
       else:
-        self._state.callbacks.append(lambda: callback())
+        self._state.callbacks.append(callback)
         return True
 
   def initial_metadata(self):
@@ -435,10 +451,10 @@ def _end_unary_response_blocking(state, with_call, deadline):
 class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
 
   def __init__(
-      self, channel, create_managed_call, method, request_serializer,
+      self, channel, managed_call, method, request_serializer,
       response_deserializer):
     self._channel = channel
-    self._create_managed_call = create_managed_call
+    self._managed_call = managed_call
     self._method = method
     self._request_serializer = request_serializer
     self._response_deserializer = response_deserializer
@@ -472,7 +488,8 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
           None, 0, completion_queue, self._method, None, deadline_timespec)
       if credentials is not None:
         call.set_credentials(credentials._credentials)
-      call.start_client_batch(cygrpc.Operations(operations), None)
+      call_error = call.start_client_batch(cygrpc.Operations(operations), None)
+      _check_call_error(call_error, metadata)
       _handle_event(completion_queue.poll(), state, self._response_deserializer)
       return state, deadline
 
@@ -490,23 +507,28 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
     if rendezvous:
       return rendezvous
     else:
-      call = self._create_managed_call(
+      call, drive_call = self._managed_call(
           None, 0, self._method, None, deadline_timespec)
       if credentials is not None:
         call.set_credentials(credentials._credentials)
       event_handler = _event_handler(state, call, self._response_deserializer)
       with state.condition:
-        call.start_client_batch(cygrpc.Operations(operations), event_handler)
+        call_error = call.start_client_batch(cygrpc.Operations(operations),
+            event_handler)
+        if call_error != cygrpc.CallError.ok:
+          _call_error_set_RPCstate(state, call_error, metadata)
+          return _Rendezvous(state, None, None, deadline)
+        drive_call()
       return _Rendezvous(state, call, self._response_deserializer, deadline)
 
 
 class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
 
   def __init__(
-      self, channel, create_managed_call, method, request_serializer,
+      self, channel, managed_call, method, request_serializer,
       response_deserializer):
     self._channel = channel
-    self._create_managed_call = create_managed_call
+    self._managed_call = managed_call
     self._method = method
     self._request_serializer = request_serializer
     self._response_deserializer = response_deserializer
@@ -518,7 +540,7 @@ class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
       raise rendezvous
     else:
       state = _RPCState(_UNARY_STREAM_INITIAL_DUE, None, None, None, None)
-      call = self._create_managed_call(
+      call, drive_call = self._managed_call(
           None, 0, self._method, None, deadline_timespec)
       if credentials is not None:
         call.set_credentials(credentials._credentials)
@@ -535,17 +557,22 @@ class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
             cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
             cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
         )
-        call.start_client_batch(cygrpc.Operations(operations), event_handler)
+        call_error = call.start_client_batch(cygrpc.Operations(operations),
+            event_handler)
+        if call_error != cygrpc.CallError.ok:
+          _call_error_set_RPCstate(state, call_error, metadata)
+          return _Rendezvous(state, None, None, deadline)
+        drive_call()
       return _Rendezvous(state, call, self._response_deserializer, deadline)
 
 
 class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
 
   def __init__(
-      self, channel, create_managed_call, method, request_serializer,
+      self, channel, managed_call, method, request_serializer,
       response_deserializer):
     self._channel = channel
-    self._create_managed_call = create_managed_call
+    self._managed_call = managed_call
     self._method = method
     self._request_serializer = request_serializer
     self._response_deserializer = response_deserializer
@@ -569,7 +596,8 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
           cygrpc.operation_receive_message(_EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
-      call.start_client_batch(cygrpc.Operations(operations), None)
+      call_error = call.start_client_batch(cygrpc.Operations(operations), None)
+      _check_call_error(call_error, metadata)
       _consume_request_iterator(
           request_iterator, state, call, self._request_serializer)
     while True:
@@ -597,7 +625,7 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
       self, request_iterator, timeout=None, metadata=None, credentials=None):
     deadline, deadline_timespec = _deadline(timeout)
     state = _RPCState(_STREAM_UNARY_INITIAL_DUE, None, None, None, None)
-    call = self._create_managed_call(
+    call, drive_call = self._managed_call(
         None, 0, self._method, None, deadline_timespec)
     if credentials is not None:
       call.set_credentials(credentials._credentials)
@@ -613,7 +641,12 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
           cygrpc.operation_receive_message(_EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
-      call.start_client_batch(cygrpc.Operations(operations), event_handler)
+      call_error = call.start_client_batch(cygrpc.Operations(operations),
+          event_handler)
+      if call_error != cygrpc.CallError.ok:
+        _call_error_set_RPCstate(state, call_error, metadata)
+        return _Rendezvous(state, None, None, deadline)
+      drive_call()
       _consume_request_iterator(
           request_iterator, state, call, self._request_serializer)
     return _Rendezvous(state, call, self._response_deserializer, deadline)
@@ -622,10 +655,10 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
 class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
 
   def __init__(
-      self, channel, create_managed_call, method, request_serializer,
+      self, channel, managed_call, method, request_serializer,
       response_deserializer):
     self._channel = channel
-    self._create_managed_call = create_managed_call
+    self._managed_call = managed_call
     self._method = method
     self._request_serializer = request_serializer
     self._response_deserializer = response_deserializer
@@ -634,7 +667,7 @@ class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
       self, request_iterator, timeout=None, metadata=None, credentials=None):
     deadline, deadline_timespec = _deadline(timeout)
     state = _RPCState(_STREAM_STREAM_INITIAL_DUE, None, None, None, None)
-    call = self._create_managed_call(
+    call, drive_call = self._managed_call(
         None, 0, self._method, None, deadline_timespec)
     if credentials is not None:
       call.set_credentials(credentials._credentials)
@@ -649,7 +682,12 @@ class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
               _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
-      call.start_client_batch(cygrpc.Operations(operations), event_handler)
+      call_error = call.start_client_batch(cygrpc.Operations(operations),
+          event_handler)
+      if call_error != cygrpc.CallError.ok:
+        _call_error_set_RPCstate(state, call_error, metadata)
+        return _Rendezvous(state, None, None, deadline)
+      drive_call()
       _consume_request_iterator(
           request_iterator, state, call, self._request_serializer)
     return _Rendezvous(state, call, self._response_deserializer, deadline)
@@ -687,16 +725,13 @@ def _run_channel_spin_thread(state):
   channel_spin_thread.start()
 
 
-def _create_channel_managed_call(state):
-  def create_channel_managed_call(parent, flags, method, host, deadline):
-    """Creates a managed cygrpc.Call.
+def _channel_managed_call_management(state):
+  def create(parent, flags, method, host, deadline):
+    """Creates a managed cygrpc.Call and a function to call to drive it.
 
-    Callers of this function must conduct at least one operation on the returned
-    call. The tags associated with operations conducted on the returned call
-    must be no-argument callables that return None to indicate that this channel
-    should continue polling for events associated with the call and return the
-    call itself to indicate that no more events associated with the call will be
-    generated.
+    If operations are successfully added to the returned cygrpc.Call, the
+    returned function must be called. If operations are not successfully added
+    to the returned cygrpc.Call, the returned function must not be called.
 
     Args:
       parent: A cygrpc.Call to be used as the parent of the created call.
@@ -706,18 +741,22 @@ def _create_channel_managed_call(state):
       deadline: A cygrpc.Timespec to be the deadline of the created call.
 
     Returns:
-      A cygrpc.Call with which to conduct an RPC.
+      A cygrpc.Call with which to conduct an RPC and a function to call if
+        operations are successfully started on the call.
     """
-    with state.lock:
-      call = state.channel.create_call(
-          parent, flags, state.completion_queue, method, host, deadline)
-      if state.managed_calls is None:
-        state.managed_calls = set((call,))
-        _run_channel_spin_thread(state)
-      else:
-        state.managed_calls.add(call)
-      return call
-  return create_channel_managed_call
+    call = state.channel.create_call(
+        parent, flags, state.completion_queue, method, host, deadline)
+
+    def drive():
+      with state.lock:
+        if state.managed_calls is None:
+          state.managed_calls = set((call,))
+          _run_channel_spin_thread(state)
+        else:
+          state.managed_calls.add(call)
+
+    return call, drive
+  return create
 
 
 class _ChannelConnectivityState(object):
@@ -847,6 +886,7 @@ def _options(options):
 
 
 class Channel(grpc.Channel):
+  """A cygrpc.Channel-backed implementation of grpc.Channel."""
 
   def __init__(self, target, options, credentials):
     """Constructor.
@@ -871,25 +911,25 @@ class Channel(grpc.Channel):
   def unary_unary(
       self, method, request_serializer=None, response_deserializer=None):
     return _UnaryUnaryMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state),
+        self._channel, _channel_managed_call_management(self._call_state),
         _common.encode(method), request_serializer, response_deserializer)
 
   def unary_stream(
       self, method, request_serializer=None, response_deserializer=None):
     return _UnaryStreamMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state),
+        self._channel, _channel_managed_call_management(self._call_state),
         _common.encode(method), request_serializer, response_deserializer)
 
   def stream_unary(
       self, method, request_serializer=None, response_deserializer=None):
     return _StreamUnaryMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state),
+        self._channel, _channel_managed_call_management(self._call_state),
         _common.encode(method), request_serializer, response_deserializer)
 
   def stream_stream(
       self, method, request_serializer=None, response_deserializer=None):
     return _StreamStreamMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state),
+        self._channel, _channel_managed_call_management(self._call_state),
         _common.encode(method), request_serializer, response_deserializer)
 
   def __del__(self):
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 9560fad137..ad766186bd 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -53,23 +53,23 @@ cdef extern from "grpc/byte_buffer_reader.h":
 
 cdef extern from "grpc/grpc.h":
 
-  ctypedef struct gpr_slice:
-    # don't worry about writing out the members of gpr_slice; we never access
+  ctypedef struct grpc_slice:
+    # don't worry about writing out the members of grpc_slice; we never access
     # them directly.
     pass
 
-  gpr_slice gpr_slice_ref(gpr_slice s) nogil
-  void gpr_slice_unref(gpr_slice s) nogil
-  gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *)) nogil
-  gpr_slice gpr_slice_new_with_len(
+  grpc_slice grpc_slice_ref(grpc_slice s) nogil
+  void grpc_slice_unref(grpc_slice s) nogil
+  grpc_slice grpc_slice_new(void *p, size_t len, void (*destroy)(void *)) nogil
+  grpc_slice grpc_slice_new_with_len(
       void *p, size_t len, void (*destroy)(void *, size_t)) nogil
-  gpr_slice gpr_slice_malloc(size_t length) nogil
-  gpr_slice gpr_slice_from_copied_string(const char *source) nogil
-  gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len) nogil
+  grpc_slice grpc_slice_malloc(size_t length) nogil
+  grpc_slice grpc_slice_from_copied_string(const char *source) nogil
+  grpc_slice grpc_slice_from_copied_buffer(const char *source, size_t len) nogil
 
   # Declare functions for function-like macros (because Cython)...
-  void *gpr_slice_start_ptr "GPR_SLICE_START_PTR" (gpr_slice s) nogil
-  size_t gpr_slice_length "GPR_SLICE_LENGTH" (gpr_slice s) nogil
+  void *grpc_slice_start_ptr "GRPC_SLICE_START_PTR" (grpc_slice s) nogil
+  size_t grpc_slice_length "GRPC_SLICE_LENGTH" (grpc_slice s) nogil
 
   ctypedef enum gpr_clock_type:
     GPR_CLOCK_MONOTONIC
@@ -101,7 +101,7 @@ cdef extern from "grpc/grpc.h":
     # We don't care about the internals.
     pass
 
-  grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+  grpc_byte_buffer *grpc_raw_byte_buffer_create(grpc_slice *slices,
                                                 size_t nslices) nogil
   size_t grpc_byte_buffer_length(grpc_byte_buffer *bb) nogil
   void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer) nogil
@@ -109,7 +109,7 @@ cdef extern from "grpc/grpc.h":
   int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
                                    grpc_byte_buffer *buffer) nogil
   int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                   gpr_slice *slice) nogil
+                                   grpc_slice *slice) nogil
   void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) nogil
 
   ctypedef enum grpc_status_code:
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 8a4eef4d2e..cadfce6ee6 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -242,19 +242,19 @@ cdef class ByteBuffer:
       return
 
     cdef char *c_data = data
-    cdef gpr_slice data_slice
+    cdef grpc_slice data_slice
     cdef size_t data_length = len(data)
     with nogil:
-      data_slice = gpr_slice_from_copied_buffer(c_data, data_length)
+      data_slice = grpc_slice_from_copied_buffer(c_data, data_length)
     with nogil:
       self.c_byte_buffer = grpc_raw_byte_buffer_create(
           &data_slice, 1)
     with nogil:
-      gpr_slice_unref(data_slice)
+      grpc_slice_unref(data_slice)
 
   def bytes(self):
     cdef grpc_byte_buffer_reader reader
-    cdef gpr_slice data_slice
+    cdef grpc_slice data_slice
     cdef size_t data_slice_length
     cdef void *data_slice_pointer
     cdef bint reader_status
@@ -267,11 +267,11 @@ cdef class ByteBuffer:
       result = bytearray()
       with nogil:
         while grpc_byte_buffer_reader_next(&reader, &data_slice):
-          data_slice_pointer = gpr_slice_start_ptr(data_slice)
-          data_slice_length = gpr_slice_length(data_slice)
+          data_slice_pointer = grpc_slice_start_ptr(data_slice)
+          data_slice_length = grpc_slice_length(data_slice)
           with gil:
             result += (<char *>data_slice_pointer)[:data_slice_length]
-          gpr_slice_unref(data_slice)
+          grpc_slice_unref(data_slice)
       with nogil:
         grpc_byte_buffer_reader_destroy(&reader)
       return bytes(result)
diff --git a/src/python/grpcio/grpc/_utilities.py b/src/python/grpcio/grpc/_utilities.py
index 4850967fbc..a375896e6e 100644
--- a/src/python/grpcio/grpc/_utilities.py
+++ b/src/python/grpcio/grpc/_utilities.py
@@ -53,13 +53,17 @@ class RpcMethodHandler(
   pass
 
 
-class DictionaryGenericHandler(grpc.GenericRpcHandler):
+class DictionaryGenericHandler(grpc.ServiceRpcHandler):
 
   def __init__(self, service, method_handlers):
+    self._name = service
     self._method_handlers = {
         _common.fully_qualified_method(service, method): method_handler
         for method, method_handler in six.iteritems(method_handlers)}
 
+  def service_name(self):
+    return self._name
+
   def service(self, handler_call_details):
     return self._method_handlers.get(handler_call_details.method)
 
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 1ad423909f..d43f93b94f 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -52,9 +52,6 @@ CORE_SOURCE_FILES = [
   'src/core/lib/support/log_windows.c',
   'src/core/lib/support/mpscq.c',
   'src/core/lib/support/murmur_hash.c',
-  'src/core/lib/support/percent_encoding.c',
-  'src/core/lib/support/slice.c',
-  'src/core/lib/support/slice_buffer.c',
   'src/core/lib/support/stack_lockfree.c',
   'src/core/lib/support/string.c',
   'src/core/lib/support/string_posix.c',
@@ -102,7 +99,6 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/endpoint_pair_windows.c',
   'src/core/lib/iomgr/error.c',
   'src/core/lib/iomgr/ev_epoll_linux.c',
-  'src/core/lib/iomgr/ev_poll_and_epoll_posix.c',
   'src/core/lib/iomgr/ev_poll_posix.c',
   'src/core/lib/iomgr/ev_posix.c',
   'src/core/lib/iomgr/exec_ctx.c',
@@ -124,6 +120,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/resolve_address_windows.c',
   'src/core/lib/iomgr/resource_quota.c',
   'src/core/lib/iomgr/sockaddr_utils.c',
+  'src/core/lib/iomgr/socket_mutator.c',
   'src/core/lib/iomgr/socket_utils_common_posix.c',
   'src/core/lib/iomgr/socket_utils_linux.c',
   'src/core/lib/iomgr/socket_utils_posix.c',
@@ -157,6 +154,10 @@ CORE_SOURCE_FILES = [
   'src/core/lib/json/json_reader.c',
   'src/core/lib/json/json_string.c',
   'src/core/lib/json/json_writer.c',
+  'src/core/lib/slice/percent_encoding.c',
+  'src/core/lib/slice/slice.c',
+  'src/core/lib/slice/slice_buffer.c',
+  'src/core/lib/slice/slice_string_helpers.c',
   'src/core/lib/surface/alarm.c',
   'src/core/lib/surface/api_trace.c',
   'src/core/lib/surface/byte_buffer.c',
@@ -180,7 +181,8 @@ CORE_SOURCE_FILES = [
   'src/core/lib/transport/mdstr_hash_table.c',
   'src/core/lib/transport/metadata.c',
   'src/core/lib/transport/metadata_batch.c',
-  'src/core/lib/transport/method_config.c',
+  'src/core/lib/transport/pid_controller.c',
+  'src/core/lib/transport/service_config.c',
   'src/core/lib/transport/static_metadata.c',
   'src/core/lib/transport/timeout_encoding.c',
   'src/core/lib/transport/transport.c',
@@ -224,9 +226,9 @@ CORE_SOURCE_FILES = [
   'src/core/lib/security/credentials/plugin/plugin_credentials.c',
   'src/core/lib/security/credentials/ssl/ssl_credentials.c',
   'src/core/lib/security/transport/client_auth_filter.c',
-  'src/core/lib/security/transport/handshake.c',
   'src/core/lib/security/transport/secure_endpoint.c',
   'src/core/lib/security/transport/security_connector.c',
+  'src/core/lib/security/transport/security_handshaker.c',
   'src/core/lib/security/transport/server_auth_filter.c',
   'src/core/lib/security/transport/tsi_error.c',
   'src/core/lib/security/util/b64.c',
@@ -235,6 +237,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/tsi/fake_transport_security.c',
   'src/core/lib/tsi/ssl_transport_security.c',
   'src/core/lib/tsi/transport_security.c',
+  'src/core/ext/transport/chttp2/server/chttp2_server.c',
   'src/core/ext/transport/chttp2/client/secure/secure_channel_create.c',
   'src/core/ext/client_channel/channel_connectivity.c',
   'src/core/ext/client_channel/client_channel.c',
@@ -254,6 +257,7 @@ CORE_SOURCE_FILES = [
   'src/core/ext/client_channel/subchannel.c',
   'src/core/ext/client_channel/subchannel_index.c',
   'src/core/ext/client_channel/uri_parser.c',
+  'src/core/ext/transport/chttp2/client/chttp2_connector.c',
   'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
   'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c',
   'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
diff --git a/src/python/grpcio/support.py b/src/python/grpcio/support.py
index f363f5fdc5..b226e690fd 100644
--- a/src/python/grpcio/support.py
+++ b/src/python/grpcio/support.py
@@ -100,9 +100,15 @@ def diagnose_compile_error(build_ext, error):
             .format(source)
           )
 
+def diagnose_attribute_error(build_ext, error):
+  if any('_needs_stub' in arg for arg in error.args):
+    raise commands.CommandError(
+        "We expect a missing `_needs_stub` attribute from older versions of "
+        "setuptools. Consider upgrading setuptools.")
 
 _ERROR_DIAGNOSES = {
-    errors.CompileError: diagnose_compile_error
+    errors.CompileError: diagnose_compile_error,
+    AttributeError: diagnose_attribute_error
 }
 
 def diagnose_build_ext_error(build_ext, error, formatted):
diff --git a/src/python/grpcio_health_checking/.gitignore b/src/python/grpcio_health_checking/.gitignore
index 85af466886..432c3194f0 100644
--- a/src/python/grpcio_health_checking/.gitignore
+++ b/src/python/grpcio_health_checking/.gitignore
@@ -1,5 +1,6 @@
 *.proto
 *_pb2.py
+*_pb2_grpc.py
 build/
 grpcio_health_checking.egg-info/
 dist/
diff --git a/src/python/grpcio_health_checking/MANIFEST.in b/src/python/grpcio_health_checking/MANIFEST.in
index 7407f646d1..5255e4c403 100644
--- a/src/python/grpcio_health_checking/MANIFEST.in
+++ b/src/python/grpcio_health_checking/MANIFEST.in
@@ -1,4 +1,4 @@
 include grpc_version.py
 include health_commands.py
-graft grpc
+graft grpc_health
 global-exclude *.pyc
diff --git a/src/python/grpcio_health_checking/grpc/health/__init__.py b/src/python/grpcio_health_checking/grpc_health/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_health_checking/grpc/health/__init__.py
+++ b/src/python/grpcio_health_checking/grpc_health/__init__.py
diff --git a/src/python/grpcio_health_checking/grpc/health/v1/__init__.py b/src/python/grpcio_health_checking/grpc_health/v1/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
+++ b/src/python/grpcio_health_checking/grpc_health/v1/__init__.py
diff --git a/src/python/grpcio_health_checking/grpc/health/v1/health.py b/src/python/grpcio_health_checking/grpc_health/v1/health.py
index 8108ac1096..0df679b0e2 100644
--- a/src/python/grpcio_health_checking/grpc/health/v1/health.py
+++ b/src/python/grpcio_health_checking/grpc_health/v1/health.py
@@ -33,7 +33,7 @@ import threading
 
 import grpc
 
-from grpc.health.v1 import health_pb2
+from grpc_health.v1 import health_pb2
 
 
 class HealthServicer(health_pb2.HealthServicer):
diff --git a/src/python/grpcio_health_checking/health_commands.py b/src/python/grpcio_health_checking/health_commands.py
index 66df25da63..0c420a655f 100644
--- a/src/python/grpcio_health_checking/health_commands.py
+++ b/src/python/grpcio_health_checking/health_commands.py
@@ -54,7 +54,7 @@ class CopyProtoModules(setuptools.Command):
     if os.path.isfile(HEALTH_PROTO):
       shutil.copyfile(
           HEALTH_PROTO,
-          os.path.join(ROOT_DIR, 'grpc/health/v1/health.proto'))
+          os.path.join(ROOT_DIR, 'grpc_health/v1/health.proto'))
 
 
 class BuildPackageProtos(setuptools.Command):
@@ -74,5 +74,5 @@ class BuildPackageProtos(setuptools.Command):
     # directory is provided as an 'include' directory. We assume it's the '' key
     # to `self.distribution.package_dir` (and get a key error if it's not
     # there).
-    from grpc.tools import command
+    from grpc_tools import command
     command.build_package_protos(self.distribution.package_dir[''])
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 8c92ee16a9..e88f389ba8 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -66,7 +66,6 @@ setuptools.setup(
     license='3-clause BSD',
     package_dir=PACKAGE_DIRECTORIES,
     packages=setuptools.find_packages('.'),
-    namespace_packages=['grpc'],
     install_requires=INSTALL_REQUIRES,
     setup_requires=SETUP_REQUIRES,
     cmdclass=COMMAND_CLASS
diff --git a/src/python/grpcio_reflection/.gitignore b/src/python/grpcio_reflection/.gitignore
new file mode 100644
index 0000000000..c0befdc8ea
--- /dev/null
+++ b/src/python/grpcio_reflection/.gitignore
@@ -0,0 +1,5 @@
+*.proto
+*_pb2.py
+build/
+grpcio_reflection.egg-info/
+dist/
diff --git a/src/python/grpcio_health_checking/grpc/__init__.py b/src/python/grpcio_reflection/grpc_reflection/__init__.py
index fcc7048815..d5ad73a74a 100644
--- a/src/python/grpcio_health_checking/grpc/__init__.py
+++ b/src/python/grpcio_reflection/grpc_reflection/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -27,4 +27,3 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-__import__('pkg_resources').declare_namespace(__name__)
diff --git a/src/python/grpcio_reflection/grpc_reflection/v1alpha/__init__.py b/src/python/grpcio_reflection/grpc_reflection/v1alpha/__init__.py
new file mode 100644
index 0000000000..d5ad73a74a
--- /dev/null
+++ b/src/python/grpcio_reflection/grpc_reflection/v1alpha/__init__.py
@@ -0,0 +1,29 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
diff --git a/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py b/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py
new file mode 100644
index 0000000000..bfcbce8e04
--- /dev/null
+++ b/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py
@@ -0,0 +1,143 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Reference implementation for reflection in gRPC Python."""
+
+import threading
+
+import grpc
+from google.protobuf import descriptor_pb2
+from google.protobuf import descriptor_pool
+
+from grpc_reflection.v1alpha import reflection_pb2
+
+_POOL = descriptor_pool.Default()
+
+def _not_found_error():
+  return reflection_pb2.ServerReflectionResponse(
+      error_response=reflection_pb2.ErrorResponse(
+          error_code=grpc.StatusCode.NOT_FOUND.value[0],
+          error_message=grpc.StatusCode.NOT_FOUND.value[1].encode(),
+      )
+  )
+
+def _file_descriptor_response(descriptor):
+  proto = descriptor_pb2.FileDescriptorProto()
+  descriptor.CopyToProto(proto)
+  serialized_proto = proto.SerializeToString()
+  return reflection_pb2.ServerReflectionResponse(
+      file_descriptor_response=reflection_pb2.FileDescriptorResponse(
+        file_descriptor_proto=(serialized_proto,)
+      ),
+  )
+
+
+class ReflectionServicer(reflection_pb2.ServerReflectionServicer):
+  """Servicer handling RPCs for service statuses."""
+
+  def __init__(self, service_names, pool=None):
+    """Constructor.
+
+    Args:
+      service_names: Iterable of fully-qualified service names available.
+    """
+    self._service_names = list(service_names)
+    self._pool = _POOL if pool is None else pool
+
+  def _file_by_filename(self, filename):
+    try:
+      descriptor = self._pool.FindFileByName(filename)
+    except KeyError:
+      return _not_found_error()
+    else:
+      return _file_descriptor_response(descriptor)
+
+  def _file_containing_symbol(self, fully_qualified_name):
+    try:
+      descriptor = self._pool.FindFileContainingSymbol(fully_qualified_name)
+    except KeyError:
+      return _not_found_error()
+    else:
+      return _file_descriptor_response(descriptor)
+
+  def _file_containing_extension(containing_type, extension_number):
+    # TODO(atash) Python protobuf currently doesn't support querying extensions.
+    # https://github.com/google/protobuf/issues/2248
+    return reflection_pb2.ServerReflectionResponse(
+        error_response=reflection_pb2.ErrorResponse(
+            error_code=grpc.StatusCode.UNIMPLEMENTED.value[0],
+            error_message=grpc.StatusCode.UNIMPLMENTED.value[1].encode(),
+        )
+    )
+
+  def _extension_numbers_of_type(fully_qualified_name):
+    # TODO(atash) We're allowed to leave this unsupported according to the
+    # protocol, but we should still eventually implement it. Hits the same issue
+    # as `_file_containing_extension`, however.
+    # https://github.com/google/protobuf/issues/2248
+    return reflection_pb2.ServerReflectionResponse(
+        error_response=reflection_pb2.ErrorResponse(
+            error_code=grpc.StatusCode.UNIMPLEMENTED.value[0],
+            error_message=grpc.StatusCode.UNIMPLMENTED.value[1].encode(),
+        )
+    )
+
+  def _list_services(self):
+    return reflection_pb2.ServerReflectionResponse(
+        list_services_response=reflection_pb2.ListServiceResponse(
+            service=[
+                reflection_pb2.ServiceResponse(name=service_name)
+                for service_name in self._service_names
+            ]
+        )
+    )
+
+  def ServerReflectionInfo(self, request_iterator, context):
+    for request in request_iterator:
+      if request.HasField('file_by_filename'):
+        yield self._file_by_filename(request.file_by_filename)
+      elif request.HasField('file_containing_symbol'):
+        yield self._file_containing_symbol(request.file_containing_symbol)
+      elif request.HasField('file_containing_extension'):
+        yield self._file_containing_extension(
+            request.file_containing_extension.containing_type,
+            request.file_containing_extension.extension_number)
+      elif request.HasField('all_extension_numbers_of_type'):
+        yield _all_extension_numbers_of_type(
+            request.all_extension_numbers_of_type)
+      elif request.HasField('list_services'):
+        yield self._list_services()
+      else:
+        yield reflection_pb2.ServerReflectionResponse(
+            error_response=reflection_pb2.ErrorResponse(
+                error_code=grpc.StatusCode.INVALID_ARGUMENT.value[0],
+                error_message=grpc.StatusCode.INVALID_ARGUMENT.value[1].encode(),
+            )
+        )
+
diff --git a/src/python/grpcio_reflection/grpc_version.py b/src/python/grpcio_reflection/grpc_version.py
new file mode 100644
index 0000000000..9b3c44c022
--- /dev/null
+++ b/src/python/grpcio_reflection/grpc_version.py
@@ -0,0 +1,32 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
+
+VERSION='1.1.0.dev0'
diff --git a/src/python/grpcio_reflection/reflection_commands.py b/src/python/grpcio_reflection/reflection_commands.py
new file mode 100644
index 0000000000..dee5491e0a
--- /dev/null
+++ b/src/python/grpcio_reflection/reflection_commands.py
@@ -0,0 +1,78 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Provides distutils command classes for the GRPC Python setup process."""
+
+import os
+import shutil
+
+import setuptools
+
+ROOT_DIR = os.path.abspath(os.path.dirname(os.path.abspath(__file__)))
+HEALTH_PROTO = os.path.join(ROOT_DIR, '../../proto/grpc/reflection/v1alpha/reflection.proto')
+
+
+class CopyProtoModules(setuptools.Command):
+  """Command to copy proto modules from grpc/src/proto."""
+
+  description = ''
+  user_options = []
+
+  def initialize_options(self):
+    pass
+
+  def finalize_options(self):
+    pass
+
+  def run(self):
+    if os.path.isfile(HEALTH_PROTO):
+      shutil.copyfile(
+          HEALTH_PROTO,
+          os.path.join(ROOT_DIR, 'grpc_reflection/v1alpha/reflection.proto'))
+
+
+class BuildPackageProtos(setuptools.Command):
+  """Command to generate project *_pb2.py modules from proto files."""
+
+  description = 'build grpc protobuf modules'
+  user_options = []
+
+  def initialize_options(self):
+    pass
+
+  def finalize_options(self):
+    pass
+
+  def run(self):
+    # due to limitations of the proto generator, we require that only *one*
+    # directory is provided as an 'include' directory. We assume it's the '' key
+    # to `self.distribution.package_dir` (and get a key error if it's not
+    # there).
+    from grpc_tools import command
+    command.build_package_protos(self.distribution.package_dir[''])
diff --git a/src/python/grpcio_reflection/setup.py b/src/python/grpcio_reflection/setup.py
new file mode 100644
index 0000000000..cfc41f4fe7
--- /dev/null
+++ b/src/python/grpcio_reflection/setup.py
@@ -0,0 +1,72 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Setup module for the GRPC Python package's optional reflection."""
+
+import os
+import sys
+
+import setuptools
+
+# Ensure we're in the proper directory whether or not we're being used by pip.
+os.chdir(os.path.dirname(os.path.abspath(__file__)))
+
+# Break import-style to ensure we can actually find our commands module.
+import reflection_commands
+import grpc_version
+
+PACKAGE_DIRECTORIES = {
+    '': '.',
+}
+
+SETUP_REQUIRES = (
+    'grpcio-tools>={version}'.format(version=grpc_version.VERSION),
+)
+
+INSTALL_REQUIRES = (
+    'protobuf>=3.0.0',
+    'grpcio>={version}'.format(version=grpc_version.VERSION),
+)
+
+COMMAND_CLASS = {
+    # Run preprocess from the repository *before* doing any packaging!
+    'preprocess': reflection_commands.CopyProtoModules,
+    'build_package_protos': reflection_commands.BuildPackageProtos,
+}
+
+setuptools.setup(
+    name='grpcio-reflection',
+    version=grpc_version.VERSION,
+    license='3-clause BSD',
+    package_dir=PACKAGE_DIRECTORIES,
+    packages=setuptools.find_packages('.'),
+    install_requires=INSTALL_REQUIRES,
+    setup_requires=SETUP_REQUIRES,
+    cmdclass=COMMAND_CLASS
+)
diff --git a/src/python/grpcio_tests/.gitignore b/src/python/grpcio_tests/.gitignore
index fc620135dc..dcba283a8c 100644
--- a/src/python/grpcio_tests/.gitignore
+++ b/src/python/grpcio_tests/.gitignore
@@ -1,4 +1,5 @@
 proto/
 src/
 *_pb2.py
+*_pb2_grpc.py
 *.egg-info/
diff --git a/src/python/grpcio_tests/commands.py b/src/python/grpcio_tests/commands.py
index 5ee551cfe1..e822971fe0 100644
--- a/src/python/grpcio_tests/commands.py
+++ b/src/python/grpcio_tests/commands.py
@@ -100,7 +100,7 @@ class BuildProtoModules(setuptools.Command):
     pass
 
   def run(self):
-    import grpc.tools.protoc as protoc
+    import grpc_tools.protoc as protoc
 
     include_regex = re.compile(self.include)
     exclude_regex = re.compile(self.exclude) if self.exclude else None
@@ -116,7 +116,7 @@ class BuildProtoModules(setuptools.Command):
     # but we currently have name conflicts in src/proto
     for path in paths:
       command = [
-          'grpc.tools.protoc',
+          'grpc_tools.protoc',
           '-I {}'.format(PROTO_STEM),
           '--python_out={}'.format(PROTO_STEM),
           '--grpc_python_out={}'.format(PROTO_STEM),
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 7384206602..375fbd6c77 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -35,7 +35,7 @@ import sys
 
 import setuptools
 
-import grpc.tools.command
+import grpc_tools.command
 
 PY3 = sys.version_info.major == 3
 
@@ -68,7 +68,7 @@ COMMAND_CLASS = {
     # Run `preprocess` *before* doing any packaging!
     'preprocess': commands.GatherProto,
 
-    'build_package_protos': grpc.tools.command.BuildPackageProtos,
+    'build_package_protos': grpc_tools.command.BuildPackageProtos,
     'build_py': commands.BuildPy,
     'run_interop': commands.RunInterop,
     'test_lite': commands.TestLite
@@ -80,8 +80,14 @@ PACKAGE_DATA = {
         'credentials/server1.key',
         'credentials/server1.pem',
     ],
-    'tests.protoc_plugin': [
-        'protoc_plugin_test.proto',
+    'tests.protoc_plugin.protos.invocation_testing': [
+        'same.proto',
+    ],
+    'tests.protoc_plugin.protos.invocation_testing.split_messages': [
+        'messages.proto',
+    ],
+    'tests.protoc_plugin.protos.invocation_testing.split_services': [
+        'services.proto',
     ],
     'tests.unit': [
         'credentials/ca.pem',
diff --git a/src/python/grpcio_tests/tests/_loader.py b/src/python/grpcio_tests/tests/_loader.py
index c2f097f6c6..621bedc7bb 100644
--- a/src/python/grpcio_tests/tests/_loader.py
+++ b/src/python/grpcio_tests/tests/_loader.py
@@ -84,11 +84,9 @@ class Loader(object):
         along.
     """
     for importer, module_name, is_package in (
-        pkgutil.iter_modules(package_paths)):
+        pkgutil.walk_packages(package_paths)):
       module = importer.find_module(module_name).load_module(module_name)
       self.visit_module(module)
-      if is_package:
-        self.walk_packages(module.__path__)
 
   def visit_module(self, module):
     """Visits the module, adding discovered tests to the test suite.
diff --git a/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py b/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
index 80300d13df..5dde72b169 100644
--- a/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
+++ b/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
@@ -27,14 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""Tests of grpc.health.v1.health."""
+"""Tests of grpc_health.v1.health."""
 
 import unittest
 
 import grpc
 from grpc.framework.foundation import logging_pool
-from grpc.health.v1 import health
-from grpc.health.v1 import health_pb2
+from grpc_health.v1 import health
+from grpc_health.v1 import health_pb2
 
 from tests.unit.framework.common import test_constants
 
diff --git a/src/python/grpcio_tests/tests/http2/_negative_http2_client.py b/src/python/grpcio_tests/tests/http2/_negative_http2_client.py
new file mode 100644
index 0000000000..f8604683b3
--- /dev/null
+++ b/src/python/grpcio_tests/tests/http2/_negative_http2_client.py
@@ -0,0 +1,153 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""The Python client used to test negative http2 conditions."""
+
+import argparse
+
+import grpc
+from src.proto.grpc.testing import test_pb2
+from src.proto.grpc.testing import messages_pb2
+
+def _validate_payload_type_and_length(response, expected_type, expected_length):
+  if response.payload.type is not expected_type:
+    raise ValueError(
+      'expected payload type %s, got %s' %
+          (expected_type, type(response.payload.type)))
+  elif len(response.payload.body) != expected_length:
+    raise ValueError(
+      'expected payload body size %d, got %d' %
+          (expected_length, len(response.payload.body)))
+
+def _expect_status_code(call, expected_code):
+  if call.code() != expected_code:
+    raise ValueError(
+      'expected code %s, got %s' % (expected_code, call.code()))
+
+def _expect_status_details(call, expected_details):
+  if call.details() != expected_details:
+    raise ValueError(
+      'expected message %s, got %s' % (expected_details, call.details()))
+
+def _validate_status_code_and_details(call, expected_code, expected_details):
+  _expect_status_code(call, expected_code)
+  _expect_status_details(call, expected_details)
+
+# common requests
+_REQUEST_SIZE = 314159
+_RESPONSE_SIZE = 271828
+
+_SIMPLE_REQUEST = messages_pb2.SimpleRequest(
+    response_type=messages_pb2.COMPRESSABLE,
+    response_size=_RESPONSE_SIZE,
+    payload=messages_pb2.Payload(body=b'\x00' * _REQUEST_SIZE))
+
+def _goaway(stub):
+  first_response = stub.UnaryCall(_SIMPLE_REQUEST)
+  _validate_payload_type_and_length(first_response, 
+      messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+  second_response = stub.UnaryCall(_SIMPLE_REQUEST)
+  _validate_payload_type_and_length(second_response, 
+      messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+
+def _rst_after_header(stub):
+  resp_future = stub.UnaryCall.future(_SIMPLE_REQUEST)
+  _validate_status_code_and_details(resp_future, grpc.StatusCode.UNAVAILABLE, "")
+
+def _rst_during_data(stub):
+  resp_future = stub.UnaryCall.future(_SIMPLE_REQUEST)
+  _validate_status_code_and_details(resp_future, grpc.StatusCode.UNKNOWN, "")
+
+def _rst_after_data(stub):
+  resp_future = stub.UnaryCall.future(_SIMPLE_REQUEST)
+  _validate_payload_type_and_length(next(resp_future),
+      messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+  _validate_status_code_and_details(resp_future, grpc.StatusCode.UNKNOWN, "")
+
+def _ping(stub):
+  response = stub.UnaryCall(_SIMPLE_REQUEST)
+  _validate_payload_type_and_length(response, 
+      messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+
+def _max_streams(stub):
+  # send one req to ensure server sets MAX_STREAMS
+  response = stub.UnaryCall(_SIMPLE_REQUEST)
+  _validate_payload_type_and_length(response, 
+      messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+
+  # give the streams a workout
+  futures = []
+  for _ in range(15):
+    futures.append(stub.UnaryCall.future(_SIMPLE_REQUEST))
+  for future in futures:
+    _validate_payload_type_and_length(future.result(),
+        messages_pb2.COMPRESSABLE, _RESPONSE_SIZE)
+
+def _run_test_case(test_case, stub):
+  if test_case == 'goaway':
+    _goaway(stub)
+  elif test_case == 'rst_after_header':
+    _rst_after_header(stub)
+  elif test_case == 'rst_during_data':
+    _rst_during_data(stub)
+  elif test_case == 'rst_after_data':
+    _rst_after_data(stub)
+  elif test_case =='ping':
+    _ping(stub)
+  elif test_case == 'max_streams':
+    _max_streams(stub)
+  else:
+    raise ValueError("Invalid test case: %s" % test_case)
+
+def _args():
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--server_host', help='the host to which to connect', type=str,
+      default="127.0.0.1")
+  parser.add_argument(
+      '--server_port', help='the port to which to connect', type=int,
+      default="8080")
+  parser.add_argument(
+      '--test_case', help='the test case to execute', type=str,
+      default="goaway")
+  return parser.parse_args()
+
+def _stub(server_host, server_port):
+  target = '{}:{}'.format(server_host, server_port)
+  channel = grpc.insecure_channel(target)
+  return test_pb2.TestServiceStub(channel)
+
+def main():
+  args = _args()
+  stub = _stub(args.server_host, args.server_port)
+  _run_test_case(args.test_case, stub)
+
+
+if __name__ == '__main__':
+  main()
diff --git a/src/python/grpcio_tests/tests/interop/client.py b/src/python/grpcio_tests/tests/interop/client.py
index 4fbf58f7d9..afaa466254 100644
--- a/src/python/grpcio_tests/tests/interop/client.py
+++ b/src/python/grpcio_tests/tests/interop/client.py
@@ -43,11 +43,13 @@ from tests.interop import resources
 def _args():
   parser = argparse.ArgumentParser()
   parser.add_argument(
-      '--server_host', help='the host to which to connect', type=str)
+      '--server_host', help='the host to which to connect', type=str,
+      default="127.0.0.1")
   parser.add_argument(
       '--server_port', help='the port to which to connect', type=int)
   parser.add_argument(
-      '--test_case', help='the test case to execute', type=str)
+      '--test_case', help='the test case to execute', type=str,
+      default="large_unary")
   parser.add_argument(
       '--use_tls', help='require a secure connection', default=False,
       type=resources.parse_bool)
@@ -55,7 +57,7 @@ def _args():
       '--use_test_ca', help='replace platform root CAs with ca.pem',
       default=False, type=resources.parse_bool)
   parser.add_argument(
-      '--server_host_override',
+      '--server_host_override', default="foo.test.google.fr",
       help='the server host to which to claim to connect', type=str)
   parser.add_argument('--oauth_scope', help='scope for OAuth tokens', type=str)
   parser.add_argument(
diff --git a/src/python/grpcio_tests/tests/interop/methods.py b/src/python/grpcio_tests/tests/interop/methods.py
index 52e56f3502..9038ae5751 100644
--- a/src/python/grpcio_tests/tests/interop/methods.py
+++ b/src/python/grpcio_tests/tests/interop/methods.py
@@ -33,7 +33,6 @@ import enum
 import json
 import os
 import threading
-import time
 
 from oauth2client import client as oauth2client_client
 
@@ -196,16 +195,6 @@ def _server_streaming(stub):
         response, messages_pb2.COMPRESSABLE, sizes[index])
 
 
-def _cancel_after_begin(stub):
-  sizes = (27182, 8, 1828, 45904,)
-  payloads = (messages_pb2.Payload(body=b'\x00' * size) for size in sizes)
-  requests = (messages_pb2.StreamingInputCallRequest(payload=payload)
-              for payload in payloads)
-  response_future = stub.StreamingInputCall.future(requests)
-  response_future.cancel()
-  if not response_future.cancelled():
-    raise ValueError('expected call to be cancelled')
-
 
 class _Pipe(object):
 
@@ -265,6 +254,16 @@ def _ping_pong(stub):
           response, messages_pb2.COMPRESSABLE, response_size)
 
 
+def _cancel_after_begin(stub):
+  with _Pipe() as pipe:
+    response_future = stub.StreamingInputCall.future(pipe)
+    response_future.cancel()
+    if not response_future.cancelled():
+      raise ValueError('expected cancelled method to return True')
+    if response_future.code() is not grpc.StatusCode.CANCELLED:
+      raise ValueError('expected status code CANCELLED')
+
+
 def _cancel_after_first_response(stub):
   request_response_sizes = (31415, 9, 2653, 58979,)
   request_payload_sizes = (27182, 8, 1828, 45904,)
@@ -302,7 +301,6 @@ def _timeout_on_sleeping_server(stub):
         response_type=messages_pb2.COMPRESSABLE,
         payload=messages_pb2.Payload(body=b'\x00' * request_payload_size))
     pipe.add(request)
-    time.sleep(0.1)
     try:
       next(response_iterator)
     except grpc.RpcError as rpc_error:
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py b/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py
new file mode 100644
index 0000000000..f8ae05bb7a
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py
@@ -0,0 +1,304 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import collections
+from concurrent import futures
+import contextlib
+import distutils.spawn
+import errno
+import importlib
+import os
+import os.path
+import pkgutil
+import shutil
+import subprocess
+import sys
+import tempfile
+import threading
+import unittest
+
+import grpc
+from grpc_tools import protoc
+from tests.unit.framework.common import test_constants
+
+_MESSAGES_IMPORT = b'import "messages.proto";'
+
+@contextlib.contextmanager
+def _system_path(path):
+  old_system_path = sys.path[:]
+  sys.path = sys.path[0:1] + path + sys.path[1:]
+  yield
+  sys.path = old_system_path
+
+
+class DummySplitServicer(object):
+
+  def __init__(self, request_class, response_class):
+    self.request_class = request_class
+    self.response_class = response_class
+
+  def Call(self, request, context):
+    return self.response_class()
+
+
+class SeparateTestMixin(object):
+
+  def testImportAttributes(self):
+    with _system_path([self.python_out_directory]):
+      pb2 = importlib.import_module(self.pb2_import)
+    pb2.Request
+    pb2.Response
+    if self.should_find_services_in_pb2:
+      pb2.TestServiceServicer
+    else:
+      with self.assertRaises(AttributeError):
+        pb2.TestServiceServicer
+
+    with _system_path([self.grpc_python_out_directory]):
+      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
+    pb2_grpc.TestServiceServicer
+    with self.assertRaises(AttributeError):
+      pb2_grpc.Request
+    with self.assertRaises(AttributeError):
+      pb2_grpc.Response
+
+  def testCall(self):
+    with _system_path([self.python_out_directory]):
+      pb2 = importlib.import_module(self.pb2_import)
+    with _system_path([self.grpc_python_out_directory]):
+      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
+    server = grpc.server(
+        futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
+    pb2_grpc.add_TestServiceServicer_to_server(
+        DummySplitServicer(
+            pb2.Request, pb2.Response), server)
+    port = server.add_insecure_port('[::]:0')
+    server.start()
+    channel = grpc.insecure_channel('localhost:{}'.format(port))
+    stub = pb2_grpc.TestServiceStub(channel)
+    request = pb2.Request()
+    expected_response = pb2.Response()
+    response = stub.Call(request)
+    self.assertEqual(expected_response, response)
+
+
+class CommonTestMixin(object):
+
+  def testImportAttributes(self):
+    with _system_path([self.python_out_directory]):
+      pb2 = importlib.import_module(self.pb2_import)
+    pb2.Request
+    pb2.Response
+    if self.should_find_services_in_pb2:
+      pb2.TestServiceServicer
+    else:
+      with self.assertRaises(AttributeError):
+        pb2.TestServiceServicer
+
+    with _system_path([self.grpc_python_out_directory]):
+      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
+    pb2_grpc.TestServiceServicer
+    with self.assertRaises(AttributeError):
+      pb2_grpc.Request
+    with self.assertRaises(AttributeError):
+      pb2_grpc.Response
+
+  def testCall(self):
+    with _system_path([self.python_out_directory]):
+      pb2 = importlib.import_module(self.pb2_import)
+    with _system_path([self.grpc_python_out_directory]):
+      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
+    server = grpc.server(
+        futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
+    pb2_grpc.add_TestServiceServicer_to_server(
+        DummySplitServicer(
+            pb2.Request, pb2.Response), server)
+    port = server.add_insecure_port('[::]:0')
+    server.start()
+    channel = grpc.insecure_channel('localhost:{}'.format(port))
+    stub = pb2_grpc.TestServiceStub(channel)
+    request = pb2.Request()
+    expected_response = pb2.Response()
+    response = stub.Call(request)
+    self.assertEqual(expected_response, response)
+
+
+class SameSeparateTest(unittest.TestCase, SeparateTestMixin):
+
+  def setUp(self):
+    same_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
+    self.directory = tempfile.mkdtemp(suffix='same_separate', dir='.')
+    self.proto_directory = os.path.join(self.directory, 'proto_path')
+    self.python_out_directory = os.path.join(self.directory, 'python_out')
+    self.grpc_python_out_directory = os.path.join(self.directory, 'grpc_python_out')
+    os.makedirs(self.proto_directory)
+    os.makedirs(self.python_out_directory)
+    os.makedirs(self.grpc_python_out_directory)
+    same_proto_file = os.path.join(self.proto_directory, 'same_separate.proto')
+    open(same_proto_file, 'wb').write(same_proto_contents)
+    protoc_result = protoc.main([
+        '',
+        '--proto_path={}'.format(self.proto_directory),
+        '--python_out={}'.format(self.python_out_directory),
+        '--grpc_python_out=grpc_2_0:{}'.format(self.grpc_python_out_directory),
+        same_proto_file,
+    ])
+    if protoc_result != 0:
+      raise Exception("unexpected protoc error")
+    open(os.path.join(self.grpc_python_out_directory, '__init__.py'), 'w').write('')
+    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
+    self.pb2_import = 'same_separate_pb2'
+    self.pb2_grpc_import = 'same_separate_pb2_grpc'
+    self.should_find_services_in_pb2 = False
+
+  def tearDown(self):
+    shutil.rmtree(self.directory)
+
+
+class SameCommonTest(unittest.TestCase, CommonTestMixin):
+
+  def setUp(self):
+    same_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
+    self.directory = tempfile.mkdtemp(suffix='same_common', dir='.')
+    self.proto_directory = os.path.join(self.directory, 'proto_path')
+    self.python_out_directory = os.path.join(self.directory, 'python_out')
+    self.grpc_python_out_directory = self.python_out_directory
+    os.makedirs(self.proto_directory)
+    os.makedirs(self.python_out_directory)
+    same_proto_file = os.path.join(self.proto_directory, 'same_common.proto')
+    open(same_proto_file, 'wb').write(same_proto_contents)
+    protoc_result = protoc.main([
+        '',
+        '--proto_path={}'.format(self.proto_directory),
+        '--python_out={}'.format(self.python_out_directory),
+        '--grpc_python_out={}'.format(self.grpc_python_out_directory),
+        same_proto_file,
+    ])
+    if protoc_result != 0:
+      raise Exception("unexpected protoc error")
+    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
+    self.pb2_import = 'same_common_pb2'
+    self.pb2_grpc_import = 'same_common_pb2_grpc'
+    self.should_find_services_in_pb2 = True
+
+  def tearDown(self):
+    shutil.rmtree(self.directory)
+
+
+class SplitCommonTest(unittest.TestCase, CommonTestMixin):
+
+  def setUp(self):
+    services_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing.split_services',
+        'services.proto')
+    messages_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing.split_messages',
+        'messages.proto')
+    self.directory = tempfile.mkdtemp(suffix='split_common', dir='.')
+    self.proto_directory = os.path.join(self.directory, 'proto_path')
+    self.python_out_directory = os.path.join(self.directory, 'python_out')
+    self.grpc_python_out_directory = self.python_out_directory
+    os.makedirs(self.proto_directory)
+    os.makedirs(self.python_out_directory)
+    services_proto_file = os.path.join(self.proto_directory,
+                                       'split_common_services.proto')
+    messages_proto_file = os.path.join(self.proto_directory,
+                                       'split_common_messages.proto')
+    open(services_proto_file, 'wb').write(services_proto_contents.replace(
+        _MESSAGES_IMPORT,
+        b'import "split_common_messages.proto";'
+    ))
+    open(messages_proto_file, 'wb').write(messages_proto_contents)
+    protoc_result = protoc.main([
+        '',
+        '--proto_path={}'.format(self.proto_directory),
+        '--python_out={}'.format(self.python_out_directory),
+        '--grpc_python_out={}'.format(self.grpc_python_out_directory),
+        services_proto_file,
+        messages_proto_file,
+    ])
+    if protoc_result != 0:
+      raise Exception("unexpected protoc error")
+    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
+    self.pb2_import = 'split_common_messages_pb2'
+    self.pb2_grpc_import = 'split_common_services_pb2_grpc'
+    self.should_find_services_in_pb2 = False
+
+  def tearDown(self):
+    shutil.rmtree(self.directory)
+
+
+class SplitSeparateTest(unittest.TestCase, SeparateTestMixin):
+
+  def setUp(self):
+    services_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing.split_services',
+        'services.proto')
+    messages_proto_contents = pkgutil.get_data(
+        'tests.protoc_plugin.protos.invocation_testing.split_messages',
+        'messages.proto')
+    self.directory = tempfile.mkdtemp(suffix='split_separate', dir='.')
+    self.proto_directory = os.path.join(self.directory, 'proto_path')
+    self.python_out_directory = os.path.join(self.directory, 'python_out')
+    self.grpc_python_out_directory = os.path.join(self.directory, 'grpc_python_out')
+    os.makedirs(self.proto_directory)
+    os.makedirs(self.python_out_directory)
+    os.makedirs(self.grpc_python_out_directory)
+    services_proto_file = os.path.join(self.proto_directory,
+                                       'split_separate_services.proto')
+    messages_proto_file = os.path.join(self.proto_directory,
+                                       'split_separate_messages.proto')
+    open(services_proto_file, 'wb').write(services_proto_contents.replace(
+        _MESSAGES_IMPORT,
+        b'import "split_separate_messages.proto";'
+    ))
+    open(messages_proto_file, 'wb').write(messages_proto_contents)
+    protoc_result = protoc.main([
+        '',
+        '--proto_path={}'.format(self.proto_directory),
+        '--python_out={}'.format(self.python_out_directory),
+        '--grpc_python_out=grpc_2_0:{}'.format(self.grpc_python_out_directory),
+        services_proto_file,
+        messages_proto_file,
+    ])
+    if protoc_result != 0:
+      raise Exception("unexpected protoc error")
+    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
+    self.pb2_import = 'split_separate_messages_pb2'
+    self.pb2_grpc_import = 'split_separate_services_pb2_grpc'
+    self.should_find_services_in_pb2 = False
+
+  def tearDown(self):
+    shutil.rmtree(self.directory)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/__init__.py b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/__init__.py
new file mode 100644
index 0000000000..2f88fa0412
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/__init__.py
@@ -0,0 +1,30 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/same.proto b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/same.proto
new file mode 100644
index 0000000000..269e2fd2c7
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/same.proto
@@ -0,0 +1,39 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package grpc_protoc_plugin.invocation_testing;
+
+message Request {}
+message Response {}
+
+service TestService {
+  rpc Call(Request) returns (Response);
+}
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/__init__.py b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/__init__.py
new file mode 100644
index 0000000000..2f88fa0412
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/__init__.py
@@ -0,0 +1,30 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/messages.proto b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/messages.proto
new file mode 100644
index 0000000000..de22dae049
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/messages.proto
@@ -0,0 +1,35 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package grpc_protoc_plugin.invocation_testing.split;
+
+message Request {}
+message Response {}
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/__init__.py b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/__init__.py
new file mode 100644
index 0000000000..2f88fa0412
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/__init__.py
@@ -0,0 +1,30 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/services.proto b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/services.proto
new file mode 100644
index 0000000000..af999cd48d
--- /dev/null
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/services.proto
@@ -0,0 +1,38 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+import "messages.proto";
+
+package grpc_protoc_plugin.invocation_testing.split;
+
+service TestService {
+  rpc Call(Request) returns (Response);
+}
diff --git a/src/python/grpcio_tests/tests/reflection/__init__.py b/src/python/grpcio_tests/tests/reflection/__init__.py
new file mode 100644
index 0000000000..100a624dc9
--- /dev/null
+++ b/src/python/grpcio_tests/tests/reflection/__init__.py
@@ -0,0 +1,28 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py b/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py
new file mode 100644
index 0000000000..c7bfeaeb95
--- /dev/null
+++ b/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py
@@ -0,0 +1,185 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests of grpc_reflection.v1alpha.reflection."""
+
+import unittest
+
+import grpc
+from grpc.framework.foundation import logging_pool
+from grpc_reflection.v1alpha import reflection
+from grpc_reflection.v1alpha import reflection_pb2
+
+from google.protobuf import descriptor_pool
+from google.protobuf import descriptor_pb2
+
+from src.proto.grpc.testing.proto2 import empty2_extensions_pb2
+from src.proto.grpc.testing import empty_pb2
+from tests.unit.framework.common import test_constants
+
+_EMPTY_PROTO_FILE_NAME = 'src/proto/grpc/testing/empty.proto'
+_EMPTY_PROTO_SYMBOL_NAME = 'grpc.testing.Empty'
+_SERVICE_NAMES = (
+    'Angstrom', 'Bohr', 'Curie', 'Dyson', 'Einstein', 'Feynman', 'Galilei')
+
+def _file_descriptor_to_proto(descriptor):
+  proto = descriptor_pb2.FileDescriptorProto()
+  descriptor.CopyToProto(proto)
+  return proto.SerializeToString()
+
+class ReflectionServicerTest(unittest.TestCase):
+
+  def setUp(self):
+    servicer = reflection.ReflectionServicer(service_names=_SERVICE_NAMES)
+    server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server(server_pool)
+    port = self._server.add_insecure_port('[::]:0')
+    reflection_pb2.add_ServerReflectionServicer_to_server(servicer, self._server)
+    self._server.start()
+
+    channel = grpc.insecure_channel('localhost:%d' % port)
+    self._stub = reflection_pb2.ServerReflectionStub(channel)
+
+  def testFileByName(self):
+    requests = (
+      reflection_pb2.ServerReflectionRequest(
+        file_by_filename=_EMPTY_PROTO_FILE_NAME
+      ),
+      reflection_pb2.ServerReflectionRequest(
+        file_by_filename='i-donut-exist'
+      ),
+    )
+    responses = tuple(self._stub.ServerReflectionInfo(requests))
+    expected_responses = (
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        file_descriptor_response=reflection_pb2.FileDescriptorResponse(
+          file_descriptor_proto=(
+            _file_descriptor_to_proto(empty_pb2.DESCRIPTOR),
+          )
+        )
+      ),
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        error_response=reflection_pb2.ErrorResponse(
+          error_code=grpc.StatusCode.NOT_FOUND.value[0],
+          error_message=grpc.StatusCode.NOT_FOUND.value[1].encode(),
+        )
+      ),
+    )
+    self.assertEqual(expected_responses, responses)
+
+  def testFileBySymbol(self):
+    requests = (
+      reflection_pb2.ServerReflectionRequest(
+        file_containing_symbol=_EMPTY_PROTO_SYMBOL_NAME
+      ),
+      reflection_pb2.ServerReflectionRequest(
+        file_containing_symbol='i.donut.exist.co.uk.org.net.me.name.foo'
+      ),
+    )
+    responses = tuple(self._stub.ServerReflectionInfo(requests))
+    expected_responses = (
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        file_descriptor_response=reflection_pb2.FileDescriptorResponse(
+          file_descriptor_proto=(
+            _file_descriptor_to_proto(empty_pb2.DESCRIPTOR),
+          )
+        )
+      ),
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        error_response=reflection_pb2.ErrorResponse(
+          error_code=grpc.StatusCode.NOT_FOUND.value[0],
+          error_message=grpc.StatusCode.NOT_FOUND.value[1].encode(),
+        )
+      ),
+    )
+    self.assertEqual(expected_responses, responses)
+
+  @unittest.skip('TODO(atash): implement file-containing-extension reflection '
+                 '(see https://github.com/google/protobuf/issues/2248)')
+  def testFileContainingExtension(self):
+    requests = (
+      reflection_pb2.ServerReflectionRequest(
+        file_containing_extension=reflection_pb2.ExtensionRequest(
+          containing_type='grpc.testing.proto2.Empty',
+          extension_number=125,
+        ),
+      ),
+      reflection_pb2.ServerReflectionRequest(
+        file_containing_extension=reflection_pb2.ExtensionRequest(
+          containing_type='i.donut.exist.co.uk.org.net.me.name.foo',
+          extension_number=55,
+        ),
+      ),
+    )
+    responses = tuple(self._stub.ServerReflectionInfo(requests))
+    expected_responses = (
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        file_descriptor_response=reflection_pb2.FileDescriptorResponse(
+          file_descriptor_proto=(
+            _file_descriptor_to_proto(empty_extensions_pb2.DESCRIPTOR),
+          )
+        )
+      ),
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        error_response=reflection_pb2.ErrorResponse(
+          error_code=grpc.StatusCode.NOT_FOUND.value[0],
+          error_message=grpc.StatusCode.NOT_FOUND.value[1].encode(),
+        )
+      ),
+    )
+    self.assertEqual(expected_responses, responses)
+
+  def testListServices(self):
+    requests = (
+      reflection_pb2.ServerReflectionRequest(
+        list_services='',
+      ),
+    )
+    responses = tuple(self._stub.ServerReflectionInfo(requests))
+    expected_responses = (
+      reflection_pb2.ServerReflectionResponse(
+        valid_host='',
+        list_services_response=reflection_pb2.ListServiceResponse(
+          service=tuple(
+            reflection_pb2.ServiceResponse(name=name)
+            for name in _SERVICE_NAMES
+          )
+        )
+      ),
+    )
+    self.assertEqual(expected_responses, responses)
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
diff --git a/src/python/grpcio_tests/tests/stress/client.py b/src/python/grpcio_tests/tests/stress/client.py
index 975f33b4c1..390ea13021 100644
--- a/src/python/grpcio_tests/tests/stress/client.py
+++ b/src/python/grpcio_tests/tests/stress/client.py
@@ -39,6 +39,7 @@ from src.proto.grpc.testing import metrics_pb2
 from src.proto.grpc.testing import test_pb2
 
 from tests.interop import methods
+from tests.interop import resources
 from tests.qps import histogram
 from tests.stress import metrics_server
 from tests.stress import test_runner
@@ -71,6 +72,16 @@ def _args():
       '--metrics_port',
       help='the port to listen for metrics requests on',
       default=8081, type=int)
+  parser.add_argument(
+      '--use_test_ca',
+      help='Whether to use our fake CA. Requires --use_tls=true',
+      default=False, type=bool)
+  parser.add_argument(
+      '--use_tls',
+      help='Whether to use TLS', default=False, type=bool)
+  parser.add_argument(
+      '--server_host_override', default="foo.test.google.fr",
+      help='the server host to which to claim to connect', type=str)
   return parser.parse_args()
 
 
@@ -90,6 +101,19 @@ def _parse_weighted_test_cases(test_case_args):
     weighted_test_cases[test_case] = int(weight)
   return weighted_test_cases
 
+def _get_channel(target, args):
+  if args.use_tls:
+    if args.use_test_ca:
+      root_certificates = resources.test_root_certificates()
+    else:
+      root_certificates = None  # will load default roots.
+    channel_credentials = grpc.ssl_channel_credentials(
+        root_certificates=root_certificates)
+    options = (('grpc.ssl_target_name_override', args.server_host_override,),)
+    return grpc.secure_channel(
+        target, channel_credentials, options=options)
+  else:
+    return grpc.insecure_channel(target)
 
 def run_test(args):
   test_cases = _parse_weighted_test_cases(args.test_cases)
@@ -108,7 +132,7 @@ def run_test(args):
 
   for test_server_target in test_server_targets:
     for _ in xrange(args.num_channels_per_server):
-      channel = grpc.insecure_channel(test_server_target)
+      channel = _get_channel(test_server_target, args)
       for _ in xrange(args.num_stubs_per_channel):
         stub = test_pb2.TestServiceStub(channel)
         runner = test_runner.TestRunner(stub, test_cases, hist,
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index 2071a33e13..c31a5f9d33 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -1,44 +1,50 @@
 [
-  "_api_test.AllTest",
-  "_api_test.ChannelConnectivityTest",
-  "_api_test.ChannelTest",
-  "_auth_test.AccessTokenCallCredentialsTest",
-  "_auth_test.GoogleCallCredentialsTest",
-  "_beta_features_test.BetaFeaturesTest", 
-  "_beta_features_test.ContextManagementAndLifecycleTest", 
-  "_cancel_many_calls_test.CancelManyCallsTest",
-  "_channel_args_test.ChannelArgsTest",
-  "_channel_connectivity_test.ChannelConnectivityTest",
-  "_channel_ready_future_test.ChannelReadyFutureTest",
-  "_channel_test.ChannelTest", 
-  "_compression_test.CompressionTest",
-  "_connectivity_channel_test.ConnectivityStatesTest",
-  "_credentials_test.CredentialsTest",
-  "_empty_message_test.EmptyMessageTest",
-  "_exit_test.ExitTest",
-  "_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
-  "_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest", 
-  "_face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest",
-  "_health_servicer_test.HealthServicerTest",
-  "_implementations_test.CallCredentialsTest",
-  "_implementations_test.ChannelCredentialsTest", 
-  "_insecure_interop_test.InsecureInteropTest", 
-  "_logging_pool_test.LoggingPoolTest", 
-  "_metadata_code_details_test.MetadataCodeDetailsTest",
-  "_metadata_test.MetadataTest",
-  "_not_found_test.NotFoundTest", 
-  "_python_plugin_test.PythonPluginTest",
-  "_read_some_but_not_all_responses_test.ReadSomeButNotAllResponsesTest",
-  "_rpc_test.RPCTest",
-  "_sanity_test.Sanity", 
-  "_secure_interop_test.SecureInteropTest", 
-  "_thread_cleanup_test.CleanupThreadTest",
-  "_utilities_test.ChannelConnectivityTest", 
-  "beta_python_plugin_test.PythonPluginTest", 
-  "cygrpc_test.InsecureServerInsecureClient", 
-  "cygrpc_test.SecureServerSecureClient", 
-  "cygrpc_test.TypeSmokeTest"
+  "health_check._health_servicer_test.HealthServicerTest",
+  "interop._insecure_interop_test.InsecureInteropTest",
+  "interop._secure_interop_test.SecureInteropTest",
+  "protoc_plugin._python_plugin_test.PythonPluginTest",
+  "protoc_plugin._split_definitions_test.SameCommonTest",
+  "protoc_plugin._split_definitions_test.SameSeparateTest",
+  "protoc_plugin._split_definitions_test.SplitCommonTest",
+  "protoc_plugin._split_definitions_test.SplitSeparateTest",
+  "protoc_plugin.beta_python_plugin_test.PythonPluginTest",
+  "reflection._reflection_servicer_test.ReflectionServicerTest",
+  "unit._api_test.AllTest",
+  "unit._api_test.ChannelConnectivityTest",
+  "unit._api_test.ChannelTest",
+  "unit._auth_test.AccessTokenCallCredentialsTest",
+  "unit._auth_test.GoogleCallCredentialsTest",
+  "unit._channel_args_test.ChannelArgsTest",
+  "unit._channel_connectivity_test.ChannelConnectivityTest",
+  "unit._channel_ready_future_test.ChannelReadyFutureTest",
+  "unit._compression_test.CompressionTest",
+  "unit._credentials_test.CredentialsTest",
+  "unit._cython._cancel_many_calls_test.CancelManyCallsTest",
+  "unit._cython._channel_test.ChannelTest",
+  "unit._cython._read_some_but_not_all_responses_test.ReadSomeButNotAllResponsesTest",
+  "unit._cython.cygrpc_test.InsecureServerInsecureClient",
+  "unit._cython.cygrpc_test.SecureServerSecureClient",
+  "unit._cython.cygrpc_test.TypeSmokeTest",
+  "unit._empty_message_test.EmptyMessageTest",
+  "unit._exit_test.ExitTest",
+  "unit._invalid_metadata_test.InvalidMetadataTest",
+  "unit._metadata_code_details_test.MetadataCodeDetailsTest",
+  "unit._metadata_test.MetadataTest",
+  "unit._rpc_test.RPCTest",
+  "unit._sanity._sanity_test.Sanity",
+  "unit._thread_cleanup_test.CleanupThreadTest",
+  "unit.beta._beta_features_test.BetaFeaturesTest",
+  "unit.beta._beta_features_test.ContextManagementAndLifecycleTest",
+  "unit.beta._connectivity_channel_test.ConnectivityStatesTest",
+  "unit.beta._face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest",
+  "unit.beta._face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest",
+  "unit.beta._face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest",
+  "unit.beta._face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest",
+  "unit.beta._face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest",
+  "unit.beta._face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest",
+  "unit.beta._implementations_test.CallCredentialsTest",
+  "unit.beta._implementations_test.ChannelCredentialsTest",
+  "unit.beta._not_found_test.NotFoundTest",
+  "unit.beta._utilities_test.ChannelConnectivityTest",
+  "unit.framework.foundation._logging_pool_test.LoggingPoolTest"
 ]
diff --git a/src/python/grpcio_tests/tests/unit/_api_test.py b/src/python/grpcio_tests/tests/unit/_api_test.py
index 2fe89499f5..51dc425420 100644
--- a/src/python/grpcio_tests/tests/unit/_api_test.py
+++ b/src/python/grpcio_tests/tests/unit/_api_test.py
@@ -65,6 +65,7 @@ class AllTest(unittest.TestCase):
         'RpcMethodHandler',
         'HandlerCallDetails',
         'GenericRpcHandler',
+        'ServiceRpcHandler',
         'Server',
         'unary_unary_rpc_method_handler',
         'unary_stream_rpc_method_handler',
diff --git a/src/python/grpcio_tests/tests/unit/_channel_ready_future_test.py b/src/python/grpcio_tests/tests/unit/_channel_ready_future_test.py
index e0a7d15aa7..46a964db8c 100644
--- a/src/python/grpcio_tests/tests/unit/_channel_ready_future_test.py
+++ b/src/python/grpcio_tests/tests/unit/_channel_ready_future_test.py
@@ -64,7 +64,7 @@ class ChannelReadyFutureTest(unittest.TestCase):
     ready_future = grpc.channel_ready_future(channel)
     ready_future.add_done_callback(callback.accept_value)
     with self.assertRaises(grpc.FutureTimeoutError):
-      ready_future.result(test_constants.SHORT_TIMEOUT)
+      ready_future.result(timeout=test_constants.SHORT_TIMEOUT)
     self.assertFalse(ready_future.cancelled())
     self.assertFalse(ready_future.done())
     self.assertTrue(ready_future.running())
@@ -85,7 +85,7 @@ class ChannelReadyFutureTest(unittest.TestCase):
 
     ready_future = grpc.channel_ready_future(channel)
     ready_future.add_done_callback(callback.accept_value)
-    self.assertIsNone(ready_future.result(test_constants.SHORT_TIMEOUT))
+    self.assertIsNone(ready_future.result(timeout=test_constants.LONG_TIMEOUT))
     value_passed_to_callback = callback.block_until_called()
     self.assertIs(ready_future, value_passed_to_callback)
     self.assertFalse(ready_future.cancelled())
diff --git a/src/python/grpcio_tests/tests/unit/_invalid_metadata_test.py b/src/python/grpcio_tests/tests/unit/_invalid_metadata_test.py
new file mode 100644
index 0000000000..2dc225de29
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_invalid_metadata_test.py
@@ -0,0 +1,175 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test of RPCs made against gRPC Python's application-layer API."""
+
+import unittest
+
+import grpc
+
+from tests.unit.framework.common import test_constants
+
+_SERIALIZE_REQUEST = lambda bytestring: bytestring * 2
+_DESERIALIZE_REQUEST = lambda bytestring: bytestring[len(bytestring) // 2:]
+_SERIALIZE_RESPONSE = lambda bytestring: bytestring * 3
+_DESERIALIZE_RESPONSE = lambda bytestring: bytestring[:len(bytestring) // 3]
+
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
+
+
+def _unary_unary_multi_callable(channel):
+  return channel.unary_unary(_UNARY_UNARY)
+
+
+def _unary_stream_multi_callable(channel):
+  return channel.unary_stream(
+      _UNARY_STREAM,
+      request_serializer=_SERIALIZE_REQUEST,
+      response_deserializer=_DESERIALIZE_RESPONSE)
+
+
+def _stream_unary_multi_callable(channel):
+  return channel.stream_unary(
+      _STREAM_UNARY,
+      request_serializer=_SERIALIZE_REQUEST,
+      response_deserializer=_DESERIALIZE_RESPONSE)
+
+
+def _stream_stream_multi_callable(channel):
+  return channel.stream_stream(_STREAM_STREAM)
+
+
+class InvalidMetadataTest(unittest.TestCase):
+
+  def setUp(self):
+    self._channel = grpc.insecure_channel('localhost:8080')
+    self._unary_unary = _unary_unary_multi_callable(self._channel)
+    self._unary_stream = _unary_stream_multi_callable(self._channel)
+    self._stream_unary = _stream_unary_multi_callable(self._channel)
+    self._stream_stream = _stream_stream_multi_callable(self._channel)
+
+  def testUnaryRequestBlockingUnaryResponse(self):
+    request = b'\x07\x08'
+    metadata = (('InVaLiD', 'UnaryRequestBlockingUnaryResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    with self.assertRaises(ValueError) as exception_context:
+      self._unary_unary(request, metadata=metadata)
+    self.assertIn(expected_error_details, str(exception_context.exception))
+
+  def testUnaryRequestBlockingUnaryResponseWithCall(self):
+    request = b'\x07\x08'
+    metadata = (('InVaLiD', 'UnaryRequestBlockingUnaryResponseWithCall'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    with self.assertRaises(ValueError) as exception_context:
+      self._unary_unary.with_call(request, metadata=metadata)
+    self.assertIn(expected_error_details, str(exception_context.exception))
+
+  def testUnaryRequestFutureUnaryResponse(self):
+    request = b'\x07\x08'
+    metadata = (('InVaLiD', 'UnaryRequestFutureUnaryResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    response_future = self._unary_unary.future(request, metadata=metadata)
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      response_future.result()
+    self.assertEqual(
+        exception_context.exception.details(), expected_error_details)
+    self.assertEqual(
+        exception_context.exception.code(), grpc.StatusCode.INTERNAL)
+    self.assertEqual(response_future.details(), expected_error_details)
+    self.assertEqual(response_future.code(), grpc.StatusCode.INTERNAL)
+
+  def testUnaryRequestStreamResponse(self):
+    request = b'\x37\x58'
+    metadata = (('InVaLiD', 'UnaryRequestStreamResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    response_iterator = self._unary_stream(request, metadata=metadata)
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      next(response_iterator)
+    self.assertEqual(
+        exception_context.exception.details(), expected_error_details)
+    self.assertEqual(
+        exception_context.exception.code(), grpc.StatusCode.INTERNAL)
+    self.assertEqual(response_iterator.details(), expected_error_details)
+    self.assertEqual(response_iterator.code(), grpc.StatusCode.INTERNAL)
+
+  def testStreamRequestBlockingUnaryResponse(self):
+    request_iterator = (b'\x07\x08' for _ in range(test_constants.STREAM_LENGTH))
+    metadata = (('InVaLiD', 'StreamRequestBlockingUnaryResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    with self.assertRaises(ValueError) as exception_context:
+      self._stream_unary(request_iterator, metadata=metadata)
+    self.assertIn(expected_error_details, str(exception_context.exception))
+
+  def testStreamRequestBlockingUnaryResponseWithCall(self):
+    request_iterator = (
+        b'\x07\x08' for _ in range(test_constants.STREAM_LENGTH))
+    metadata = (('InVaLiD', 'StreamRequestBlockingUnaryResponseWithCall'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    multi_callable = _stream_unary_multi_callable(self._channel)
+    with self.assertRaises(ValueError) as exception_context:
+      multi_callable.with_call(request_iterator, metadata=metadata)
+    self.assertIn(expected_error_details, str(exception_context.exception))
+
+  def testStreamRequestFutureUnaryResponse(self):
+    request_iterator = (
+        b'\x07\x08' for _ in range(test_constants.STREAM_LENGTH))
+    metadata = (('InVaLiD', 'StreamRequestFutureUnaryResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    response_future = self._stream_unary.future(
+        request_iterator, metadata=metadata)
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      response_future.result()
+    self.assertEqual(
+        exception_context.exception.details(), expected_error_details)
+    self.assertEqual(
+        exception_context.exception.code(), grpc.StatusCode.INTERNAL)
+    self.assertEqual(response_future.details(), expected_error_details)
+    self.assertEqual(response_future.code(), grpc.StatusCode.INTERNAL)
+
+  def testStreamRequestStreamResponse(self):
+    request_iterator = (
+        b'\x07\x08' for _ in range(test_constants.STREAM_LENGTH))
+    metadata = (('InVaLiD', 'StreamRequestStreamResponse'),)
+    expected_error_details = "metadata was invalid: %s" % metadata
+    response_iterator = self._stream_stream(request_iterator, metadata=metadata)
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      next(response_iterator)
+    self.assertEqual(
+        exception_context.exception.details(), expected_error_details)
+    self.assertEqual(
+        exception_context.exception.code(), grpc.StatusCode.INTERNAL)
+    self.assertEqual(response_iterator.details(), expected_error_details)
+    self.assertEqual(response_iterator.code(), grpc.StatusCode.INTERNAL)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
diff --git a/src/python/grpcio_tests/tests/unit/_rpc_test.py b/src/python/grpcio_tests/tests/unit/_rpc_test.py
index ab6546bf87..eb00156da5 100644
--- a/src/python/grpcio_tests/tests/unit/_rpc_test.py
+++ b/src/python/grpcio_tests/tests/unit/_rpc_test.py
@@ -191,6 +191,10 @@ class RPCTest(unittest.TestCase):
 
     self._channel = grpc.insecure_channel('localhost:%d' % port)
 
+  def tearDown(self):
+    self._server.stop(None)
+    self._server_pool.shutdown(wait=True)
+
   def testUnrecognizedMethod(self):
     request = b'abc'
 
diff --git a/src/python/grpcio_tests/tests/unit/beta/_utilities_test.py b/src/python/grpcio_tests/tests/unit/beta/_utilities_test.py
index 90fe10c77c..9cce96cc85 100644
--- a/src/python/grpcio_tests/tests/unit/beta/_utilities_test.py
+++ b/src/python/grpcio_tests/tests/unit/beta/_utilities_test.py
@@ -66,7 +66,7 @@ class ChannelConnectivityTest(unittest.TestCase):
     ready_future = utilities.channel_ready_future(channel)
     ready_future.add_done_callback(callback.accept_value)
     with self.assertRaises(future.TimeoutError):
-      ready_future.result(test_constants.SHORT_TIMEOUT)
+      ready_future.result(timeout=test_constants.SHORT_TIMEOUT)
     self.assertFalse(ready_future.cancelled())
     self.assertFalse(ready_future.done())
     self.assertTrue(ready_future.running())
@@ -88,7 +88,7 @@ class ChannelConnectivityTest(unittest.TestCase):
       ready_future = utilities.channel_ready_future(channel)
       ready_future.add_done_callback(callback.accept_value)
       self.assertIsNone(
-          ready_future.result(test_constants.SHORT_TIMEOUT))
+          ready_future.result(timeout=test_constants.LONG_TIMEOUT))
       value_passed_to_callback = callback.block_until_called()
       self.assertIs(ready_future, value_passed_to_callback)
       self.assertFalse(ready_future.cancelled())
diff --git a/src/ruby/ext/grpc/rb_byte_buffer.c b/src/ruby/ext/grpc/rb_byte_buffer.c
index 61b7c30315..47fd6d9120 100644
--- a/src/ruby/ext/grpc/rb_byte_buffer.c
+++ b/src/ruby/ext/grpc/rb_byte_buffer.c
@@ -38,20 +38,20 @@
 
 #include <grpc/grpc.h>
 #include <grpc/byte_buffer_reader.h>
-#include <grpc/support/slice.h>
+#include <grpc/slice.h>
 #include "rb_grpc.h"
 
 grpc_byte_buffer* grpc_rb_s_to_byte_buffer(char *string, size_t length) {
-  gpr_slice slice = gpr_slice_from_copied_buffer(string, length);
+  grpc_slice slice = grpc_slice_from_copied_buffer(string, length);
   grpc_byte_buffer *buffer = grpc_raw_byte_buffer_create(&slice, 1);
-  gpr_slice_unref(slice);
+  grpc_slice_unref(slice);
   return buffer;
 }
 
 VALUE grpc_rb_byte_buffer_to_s(grpc_byte_buffer *buffer) {
   VALUE rb_string;
   grpc_byte_buffer_reader reader;
-  gpr_slice next;
+  grpc_slice next;
   if (buffer == NULL) {
     return Qnil;
   }
@@ -61,9 +61,10 @@ VALUE grpc_rb_byte_buffer_to_s(grpc_byte_buffer *buffer) {
     return Qnil;
   }
   while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
-    rb_str_cat(rb_string, (const char *) GPR_SLICE_START_PTR(next),
-               GPR_SLICE_LENGTH(next));
-    gpr_slice_unref(next);
+    rb_str_cat(rb_string, (const char *) GRPC_SLICE_START_PTR(next),
+               GRPC_SLICE_LENGTH(next));
+    grpc_slice_unref(next);
   }
+  grpc_byte_buffer_reader_destroy(&reader);
   return rb_string;
 }
diff --git a/src/ruby/ext/grpc/rb_call_credentials.c b/src/ruby/ext/grpc/rb_call_credentials.c
index 9b6675da84..280f21c973 100644
--- a/src/ruby/ext/grpc/rb_call_credentials.c
+++ b/src/ruby/ext/grpc/rb_call_credentials.c
@@ -86,19 +86,16 @@ static VALUE grpc_rb_call_credentials_callback_rescue(VALUE args,
       rb_funcall(exception_object, rb_intern("backtrace"), 0),
       rb_intern("join"),
       1, rb_str_new2("\n\tfrom "));
-  VALUE rb_exception_info = rb_funcall(exception_object, rb_intern("to_s"), 0);
-  const char *exception_classname = rb_obj_classname(exception_object);
+  VALUE rb_exception_info = rb_funcall(exception_object, rb_intern("inspect"), 0);
   (void)args;
-  gpr_log(GPR_INFO, "Call credentials callback failed: %s: %s\n%s",
-          exception_classname, StringValueCStr(rb_exception_info),
+  gpr_log(GPR_INFO, "Call credentials callback failed: %s\n%s",
+          StringValueCStr(rb_exception_info),
           StringValueCStr(backtrace));
   rb_hash_aset(result, rb_str_new2("metadata"), Qnil);
-  /* Currently only gives the exception class name. It should be possible get
-     more details */
   rb_hash_aset(result, rb_str_new2("status"),
-               INT2NUM(GRPC_STATUS_PERMISSION_DENIED));
+               INT2NUM(GRPC_STATUS_UNAUTHENTICATED));
   rb_hash_aset(result, rb_str_new2("details"),
-               rb_str_new2(exception_classname));
+               rb_exception_info);
   return result;
 }
 
diff --git a/src/ruby/ext/grpc/rb_compression_options.c b/src/ruby/ext/grpc/rb_compression_options.c
index c5668fdab4..6200dbafeb 100644
--- a/src/ruby/ext/grpc/rb_compression_options.c
+++ b/src/ruby/ext/grpc/rb_compression_options.c
@@ -283,6 +283,8 @@ VALUE grpc_rb_compression_options_level_value_to_name_internal(
           rb_eArgError,
           "Failed to convert compression level value to name for value: %d",
           (int)compression_value);
+      /* return something to avoid compiler error about no return */
+      return Qnil;
   }
 }
 
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index fd73cc7970..6c36df9113 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -110,6 +110,7 @@ grpc_call_get_peer_type grpc_call_get_peer_import;
 grpc_census_call_set_context_type grpc_census_call_set_context_import;
 grpc_census_call_get_context_type grpc_census_call_get_context_import;
 grpc_channel_get_target_type grpc_channel_get_target_import;
+grpc_channel_get_info_type grpc_channel_get_info_import;
 grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
 grpc_lame_client_channel_create_type grpc_lame_client_channel_create_import;
 grpc_channel_destroy_type grpc_channel_destroy_import;
@@ -172,6 +173,36 @@ grpc_ssl_server_credentials_create_ex_type grpc_ssl_server_credentials_create_ex
 grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
 grpc_call_set_credentials_type grpc_call_set_credentials_import;
 grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+grpc_slice_ref_type grpc_slice_ref_import;
+grpc_slice_unref_type grpc_slice_unref_import;
+grpc_slice_new_type grpc_slice_new_import;
+grpc_slice_new_with_user_data_type grpc_slice_new_with_user_data_import;
+grpc_slice_new_with_len_type grpc_slice_new_with_len_import;
+grpc_slice_malloc_type grpc_slice_malloc_import;
+grpc_slice_from_copied_string_type grpc_slice_from_copied_string_import;
+grpc_slice_from_copied_buffer_type grpc_slice_from_copied_buffer_import;
+grpc_slice_from_static_string_type grpc_slice_from_static_string_import;
+grpc_slice_sub_type grpc_slice_sub_import;
+grpc_slice_sub_no_ref_type grpc_slice_sub_no_ref_import;
+grpc_slice_split_tail_type grpc_slice_split_tail_import;
+grpc_slice_split_head_type grpc_slice_split_head_import;
+gpr_empty_slice_type gpr_empty_slice_import;
+grpc_slice_cmp_type grpc_slice_cmp_import;
+grpc_slice_str_cmp_type grpc_slice_str_cmp_import;
+grpc_slice_is_equivalent_type grpc_slice_is_equivalent_import;
+grpc_slice_buffer_init_type grpc_slice_buffer_init_import;
+grpc_slice_buffer_destroy_type grpc_slice_buffer_destroy_import;
+grpc_slice_buffer_add_type grpc_slice_buffer_add_import;
+grpc_slice_buffer_add_indexed_type grpc_slice_buffer_add_indexed_import;
+grpc_slice_buffer_addn_type grpc_slice_buffer_addn_import;
+grpc_slice_buffer_tiny_add_type grpc_slice_buffer_tiny_add_import;
+grpc_slice_buffer_pop_type grpc_slice_buffer_pop_import;
+grpc_slice_buffer_reset_and_unref_type grpc_slice_buffer_reset_and_unref_import;
+grpc_slice_buffer_swap_type grpc_slice_buffer_swap_import;
+grpc_slice_buffer_move_into_type grpc_slice_buffer_move_into_import;
+grpc_slice_buffer_trim_end_type grpc_slice_buffer_trim_end_import;
+grpc_slice_buffer_move_first_type grpc_slice_buffer_move_first_import;
+grpc_slice_buffer_take_first_type grpc_slice_buffer_take_first_import;
 gpr_malloc_type gpr_malloc_import;
 gpr_free_type gpr_free_import;
 gpr_realloc_type gpr_realloc_import;
@@ -221,35 +252,6 @@ gpr_set_log_verbosity_type gpr_set_log_verbosity_import;
 gpr_log_verbosity_init_type gpr_log_verbosity_init_import;
 gpr_set_log_function_type gpr_set_log_function_import;
 gpr_format_message_type gpr_format_message_import;
-gpr_slice_ref_type gpr_slice_ref_import;
-gpr_slice_unref_type gpr_slice_unref_import;
-gpr_slice_new_type gpr_slice_new_import;
-gpr_slice_new_with_user_data_type gpr_slice_new_with_user_data_import;
-gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
-gpr_slice_malloc_type gpr_slice_malloc_import;
-gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
-gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
-gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
-gpr_slice_sub_type gpr_slice_sub_import;
-gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
-gpr_slice_split_tail_type gpr_slice_split_tail_import;
-gpr_slice_split_head_type gpr_slice_split_head_import;
-gpr_empty_slice_type gpr_empty_slice_import;
-gpr_slice_cmp_type gpr_slice_cmp_import;
-gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
-gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
-gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
-gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
-gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
-gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
-gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
-gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
-gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
-gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
-gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
-gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
-gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
-gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
 gpr_strdup_type gpr_strdup_import;
 gpr_asprintf_type gpr_asprintf_import;
 gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
@@ -384,6 +386,7 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_census_call_set_context_import = (grpc_census_call_set_context_type) GetProcAddress(library, "grpc_census_call_set_context");
   grpc_census_call_get_context_import = (grpc_census_call_get_context_type) GetProcAddress(library, "grpc_census_call_get_context");
   grpc_channel_get_target_import = (grpc_channel_get_target_type) GetProcAddress(library, "grpc_channel_get_target");
+  grpc_channel_get_info_import = (grpc_channel_get_info_type) GetProcAddress(library, "grpc_channel_get_info");
   grpc_insecure_channel_create_import = (grpc_insecure_channel_create_type) GetProcAddress(library, "grpc_insecure_channel_create");
   grpc_lame_client_channel_create_import = (grpc_lame_client_channel_create_type) GetProcAddress(library, "grpc_lame_client_channel_create");
   grpc_channel_destroy_import = (grpc_channel_destroy_type) GetProcAddress(library, "grpc_channel_destroy");
@@ -446,6 +449,36 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_server_add_secure_http2_port_import = (grpc_server_add_secure_http2_port_type) GetProcAddress(library, "grpc_server_add_secure_http2_port");
   grpc_call_set_credentials_import = (grpc_call_set_credentials_type) GetProcAddress(library, "grpc_call_set_credentials");
   grpc_server_credentials_set_auth_metadata_processor_import = (grpc_server_credentials_set_auth_metadata_processor_type) GetProcAddress(library, "grpc_server_credentials_set_auth_metadata_processor");
+  grpc_slice_ref_import = (grpc_slice_ref_type) GetProcAddress(library, "grpc_slice_ref");
+  grpc_slice_unref_import = (grpc_slice_unref_type) GetProcAddress(library, "grpc_slice_unref");
+  grpc_slice_new_import = (grpc_slice_new_type) GetProcAddress(library, "grpc_slice_new");
+  grpc_slice_new_with_user_data_import = (grpc_slice_new_with_user_data_type) GetProcAddress(library, "grpc_slice_new_with_user_data");
+  grpc_slice_new_with_len_import = (grpc_slice_new_with_len_type) GetProcAddress(library, "grpc_slice_new_with_len");
+  grpc_slice_malloc_import = (grpc_slice_malloc_type) GetProcAddress(library, "grpc_slice_malloc");
+  grpc_slice_from_copied_string_import = (grpc_slice_from_copied_string_type) GetProcAddress(library, "grpc_slice_from_copied_string");
+  grpc_slice_from_copied_buffer_import = (grpc_slice_from_copied_buffer_type) GetProcAddress(library, "grpc_slice_from_copied_buffer");
+  grpc_slice_from_static_string_import = (grpc_slice_from_static_string_type) GetProcAddress(library, "grpc_slice_from_static_string");
+  grpc_slice_sub_import = (grpc_slice_sub_type) GetProcAddress(library, "grpc_slice_sub");
+  grpc_slice_sub_no_ref_import = (grpc_slice_sub_no_ref_type) GetProcAddress(library, "grpc_slice_sub_no_ref");
+  grpc_slice_split_tail_import = (grpc_slice_split_tail_type) GetProcAddress(library, "grpc_slice_split_tail");
+  grpc_slice_split_head_import = (grpc_slice_split_head_type) GetProcAddress(library, "grpc_slice_split_head");
+  gpr_empty_slice_import = (gpr_empty_slice_type) GetProcAddress(library, "gpr_empty_slice");
+  grpc_slice_cmp_import = (grpc_slice_cmp_type) GetProcAddress(library, "grpc_slice_cmp");
+  grpc_slice_str_cmp_import = (grpc_slice_str_cmp_type) GetProcAddress(library, "grpc_slice_str_cmp");
+  grpc_slice_is_equivalent_import = (grpc_slice_is_equivalent_type) GetProcAddress(library, "grpc_slice_is_equivalent");
+  grpc_slice_buffer_init_import = (grpc_slice_buffer_init_type) GetProcAddress(library, "grpc_slice_buffer_init");
+  grpc_slice_buffer_destroy_import = (grpc_slice_buffer_destroy_type) GetProcAddress(library, "grpc_slice_buffer_destroy");
+  grpc_slice_buffer_add_import = (grpc_slice_buffer_add_type) GetProcAddress(library, "grpc_slice_buffer_add");
+  grpc_slice_buffer_add_indexed_import = (grpc_slice_buffer_add_indexed_type) GetProcAddress(library, "grpc_slice_buffer_add_indexed");
+  grpc_slice_buffer_addn_import = (grpc_slice_buffer_addn_type) GetProcAddress(library, "grpc_slice_buffer_addn");
+  grpc_slice_buffer_tiny_add_import = (grpc_slice_buffer_tiny_add_type) GetProcAddress(library, "grpc_slice_buffer_tiny_add");
+  grpc_slice_buffer_pop_import = (grpc_slice_buffer_pop_type) GetProcAddress(library, "grpc_slice_buffer_pop");
+  grpc_slice_buffer_reset_and_unref_import = (grpc_slice_buffer_reset_and_unref_type) GetProcAddress(library, "grpc_slice_buffer_reset_and_unref");
+  grpc_slice_buffer_swap_import = (grpc_slice_buffer_swap_type) GetProcAddress(library, "grpc_slice_buffer_swap");
+  grpc_slice_buffer_move_into_import = (grpc_slice_buffer_move_into_type) GetProcAddress(library, "grpc_slice_buffer_move_into");
+  grpc_slice_buffer_trim_end_import = (grpc_slice_buffer_trim_end_type) GetProcAddress(library, "grpc_slice_buffer_trim_end");
+  grpc_slice_buffer_move_first_import = (grpc_slice_buffer_move_first_type) GetProcAddress(library, "grpc_slice_buffer_move_first");
+  grpc_slice_buffer_take_first_import = (grpc_slice_buffer_take_first_type) GetProcAddress(library, "grpc_slice_buffer_take_first");
   gpr_malloc_import = (gpr_malloc_type) GetProcAddress(library, "gpr_malloc");
   gpr_free_import = (gpr_free_type) GetProcAddress(library, "gpr_free");
   gpr_realloc_import = (gpr_realloc_type) GetProcAddress(library, "gpr_realloc");
@@ -495,35 +528,6 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_log_verbosity_init_import = (gpr_log_verbosity_init_type) GetProcAddress(library, "gpr_log_verbosity_init");
   gpr_set_log_function_import = (gpr_set_log_function_type) GetProcAddress(library, "gpr_set_log_function");
   gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
-  gpr_slice_ref_import = (gpr_slice_ref_type) GetProcAddress(library, "gpr_slice_ref");
-  gpr_slice_unref_import = (gpr_slice_unref_type) GetProcAddress(library, "gpr_slice_unref");
-  gpr_slice_new_import = (gpr_slice_new_type) GetProcAddress(library, "gpr_slice_new");
-  gpr_slice_new_with_user_data_import = (gpr_slice_new_with_user_data_type) GetProcAddress(library, "gpr_slice_new_with_user_data");
-  gpr_slice_new_with_len_import = (gpr_slice_new_with_len_type) GetProcAddress(library, "gpr_slice_new_with_len");
-  gpr_slice_malloc_import = (gpr_slice_malloc_type) GetProcAddress(library, "gpr_slice_malloc");
-  gpr_slice_from_copied_string_import = (gpr_slice_from_copied_string_type) GetProcAddress(library, "gpr_slice_from_copied_string");
-  gpr_slice_from_copied_buffer_import = (gpr_slice_from_copied_buffer_type) GetProcAddress(library, "gpr_slice_from_copied_buffer");
-  gpr_slice_from_static_string_import = (gpr_slice_from_static_string_type) GetProcAddress(library, "gpr_slice_from_static_string");
-  gpr_slice_sub_import = (gpr_slice_sub_type) GetProcAddress(library, "gpr_slice_sub");
-  gpr_slice_sub_no_ref_import = (gpr_slice_sub_no_ref_type) GetProcAddress(library, "gpr_slice_sub_no_ref");
-  gpr_slice_split_tail_import = (gpr_slice_split_tail_type) GetProcAddress(library, "gpr_slice_split_tail");
-  gpr_slice_split_head_import = (gpr_slice_split_head_type) GetProcAddress(library, "gpr_slice_split_head");
-  gpr_empty_slice_import = (gpr_empty_slice_type) GetProcAddress(library, "gpr_empty_slice");
-  gpr_slice_cmp_import = (gpr_slice_cmp_type) GetProcAddress(library, "gpr_slice_cmp");
-  gpr_slice_str_cmp_import = (gpr_slice_str_cmp_type) GetProcAddress(library, "gpr_slice_str_cmp");
-  gpr_slice_buffer_init_import = (gpr_slice_buffer_init_type) GetProcAddress(library, "gpr_slice_buffer_init");
-  gpr_slice_buffer_destroy_import = (gpr_slice_buffer_destroy_type) GetProcAddress(library, "gpr_slice_buffer_destroy");
-  gpr_slice_buffer_add_import = (gpr_slice_buffer_add_type) GetProcAddress(library, "gpr_slice_buffer_add");
-  gpr_slice_buffer_add_indexed_import = (gpr_slice_buffer_add_indexed_type) GetProcAddress(library, "gpr_slice_buffer_add_indexed");
-  gpr_slice_buffer_addn_import = (gpr_slice_buffer_addn_type) GetProcAddress(library, "gpr_slice_buffer_addn");
-  gpr_slice_buffer_tiny_add_import = (gpr_slice_buffer_tiny_add_type) GetProcAddress(library, "gpr_slice_buffer_tiny_add");
-  gpr_slice_buffer_pop_import = (gpr_slice_buffer_pop_type) GetProcAddress(library, "gpr_slice_buffer_pop");
-  gpr_slice_buffer_reset_and_unref_import = (gpr_slice_buffer_reset_and_unref_type) GetProcAddress(library, "gpr_slice_buffer_reset_and_unref");
-  gpr_slice_buffer_swap_import = (gpr_slice_buffer_swap_type) GetProcAddress(library, "gpr_slice_buffer_swap");
-  gpr_slice_buffer_move_into_import = (gpr_slice_buffer_move_into_type) GetProcAddress(library, "gpr_slice_buffer_move_into");
-  gpr_slice_buffer_trim_end_import = (gpr_slice_buffer_trim_end_type) GetProcAddress(library, "gpr_slice_buffer_trim_end");
-  gpr_slice_buffer_move_first_import = (gpr_slice_buffer_move_first_type) GetProcAddress(library, "gpr_slice_buffer_move_first");
-  gpr_slice_buffer_take_first_import = (gpr_slice_buffer_take_first_type) GetProcAddress(library, "gpr_slice_buffer_take_first");
   gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
   gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
   gpr_subprocess_binary_extension_import = (gpr_subprocess_binary_extension_type) GetProcAddress(library, "gpr_subprocess_binary_extension");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index c2244150f2..5745686adf 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -46,6 +46,8 @@
 #include <grpc/grpc.h>
 #include <grpc/grpc_posix.h>
 #include <grpc/grpc_security.h>
+#include <grpc/slice.h>
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/avl.h>
 #include <grpc/support/cmdline.h>
@@ -54,18 +56,16 @@
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/log_windows.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/subprocess.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 
-typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(grpc_slice *slices, size_t nslices);
 extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
 #define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
-typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(grpc_slice *slices, size_t nslices, grpc_compression_algorithm compression);
 extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
 #define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
 typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
@@ -83,10 +83,10 @@ extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
 typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
 extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
 #define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
-typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, gpr_slice *slice);
+typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, grpc_slice *slice);
 extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
 #define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
-typedef gpr_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
+typedef grpc_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
 extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
 #define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
 typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
@@ -281,6 +281,9 @@ extern grpc_census_call_get_context_type grpc_census_call_get_context_import;
 typedef char *(*grpc_channel_get_target_type)(grpc_channel *channel);
 extern grpc_channel_get_target_type grpc_channel_get_target_import;
 #define grpc_channel_get_target grpc_channel_get_target_import
+typedef void(*grpc_channel_get_info_type)(grpc_channel *channel, const grpc_channel_info *channel_info);
+extern grpc_channel_get_info_type grpc_channel_get_info_import;
+#define grpc_channel_get_info grpc_channel_get_info_import
 typedef grpc_channel *(*grpc_insecure_channel_create_type)(const char *target, const grpc_channel_args *args, void *reserved);
 extern grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
 #define grpc_insecure_channel_create grpc_insecure_channel_create_import
@@ -467,6 +470,96 @@ extern grpc_call_set_credentials_type grpc_call_set_credentials_import;
 typedef void(*grpc_server_credentials_set_auth_metadata_processor_type)(grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
 extern grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
 #define grpc_server_credentials_set_auth_metadata_processor grpc_server_credentials_set_auth_metadata_processor_import
+typedef grpc_slice(*grpc_slice_ref_type)(grpc_slice s);
+extern grpc_slice_ref_type grpc_slice_ref_import;
+#define grpc_slice_ref grpc_slice_ref_import
+typedef void(*grpc_slice_unref_type)(grpc_slice s);
+extern grpc_slice_unref_type grpc_slice_unref_import;
+#define grpc_slice_unref grpc_slice_unref_import
+typedef grpc_slice(*grpc_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
+extern grpc_slice_new_type grpc_slice_new_import;
+#define grpc_slice_new grpc_slice_new_import
+typedef grpc_slice(*grpc_slice_new_with_user_data_type)(void *p, size_t len, void (*destroy)(void *), void *user_data);
+extern grpc_slice_new_with_user_data_type grpc_slice_new_with_user_data_import;
+#define grpc_slice_new_with_user_data grpc_slice_new_with_user_data_import
+typedef grpc_slice(*grpc_slice_new_with_len_type)(void *p, size_t len, void (*destroy)(void *, size_t));
+extern grpc_slice_new_with_len_type grpc_slice_new_with_len_import;
+#define grpc_slice_new_with_len grpc_slice_new_with_len_import
+typedef grpc_slice(*grpc_slice_malloc_type)(size_t length);
+extern grpc_slice_malloc_type grpc_slice_malloc_import;
+#define grpc_slice_malloc grpc_slice_malloc_import
+typedef grpc_slice(*grpc_slice_from_copied_string_type)(const char *source);
+extern grpc_slice_from_copied_string_type grpc_slice_from_copied_string_import;
+#define grpc_slice_from_copied_string grpc_slice_from_copied_string_import
+typedef grpc_slice(*grpc_slice_from_copied_buffer_type)(const char *source, size_t len);
+extern grpc_slice_from_copied_buffer_type grpc_slice_from_copied_buffer_import;
+#define grpc_slice_from_copied_buffer grpc_slice_from_copied_buffer_import
+typedef grpc_slice(*grpc_slice_from_static_string_type)(const char *source);
+extern grpc_slice_from_static_string_type grpc_slice_from_static_string_import;
+#define grpc_slice_from_static_string grpc_slice_from_static_string_import
+typedef grpc_slice(*grpc_slice_sub_type)(grpc_slice s, size_t begin, size_t end);
+extern grpc_slice_sub_type grpc_slice_sub_import;
+#define grpc_slice_sub grpc_slice_sub_import
+typedef grpc_slice(*grpc_slice_sub_no_ref_type)(grpc_slice s, size_t begin, size_t end);
+extern grpc_slice_sub_no_ref_type grpc_slice_sub_no_ref_import;
+#define grpc_slice_sub_no_ref grpc_slice_sub_no_ref_import
+typedef grpc_slice(*grpc_slice_split_tail_type)(grpc_slice *s, size_t split);
+extern grpc_slice_split_tail_type grpc_slice_split_tail_import;
+#define grpc_slice_split_tail grpc_slice_split_tail_import
+typedef grpc_slice(*grpc_slice_split_head_type)(grpc_slice *s, size_t split);
+extern grpc_slice_split_head_type grpc_slice_split_head_import;
+#define grpc_slice_split_head grpc_slice_split_head_import
+typedef grpc_slice(*gpr_empty_slice_type)(void);
+extern gpr_empty_slice_type gpr_empty_slice_import;
+#define gpr_empty_slice gpr_empty_slice_import
+typedef int(*grpc_slice_cmp_type)(grpc_slice a, grpc_slice b);
+extern grpc_slice_cmp_type grpc_slice_cmp_import;
+#define grpc_slice_cmp grpc_slice_cmp_import
+typedef int(*grpc_slice_str_cmp_type)(grpc_slice a, const char *b);
+extern grpc_slice_str_cmp_type grpc_slice_str_cmp_import;
+#define grpc_slice_str_cmp grpc_slice_str_cmp_import
+typedef int(*grpc_slice_is_equivalent_type)(grpc_slice a, grpc_slice b);
+extern grpc_slice_is_equivalent_type grpc_slice_is_equivalent_import;
+#define grpc_slice_is_equivalent grpc_slice_is_equivalent_import
+typedef void(*grpc_slice_buffer_init_type)(grpc_slice_buffer *sb);
+extern grpc_slice_buffer_init_type grpc_slice_buffer_init_import;
+#define grpc_slice_buffer_init grpc_slice_buffer_init_import
+typedef void(*grpc_slice_buffer_destroy_type)(grpc_slice_buffer *sb);
+extern grpc_slice_buffer_destroy_type grpc_slice_buffer_destroy_import;
+#define grpc_slice_buffer_destroy grpc_slice_buffer_destroy_import
+typedef void(*grpc_slice_buffer_add_type)(grpc_slice_buffer *sb, grpc_slice slice);
+extern grpc_slice_buffer_add_type grpc_slice_buffer_add_import;
+#define grpc_slice_buffer_add grpc_slice_buffer_add_import
+typedef size_t(*grpc_slice_buffer_add_indexed_type)(grpc_slice_buffer *sb, grpc_slice slice);
+extern grpc_slice_buffer_add_indexed_type grpc_slice_buffer_add_indexed_import;
+#define grpc_slice_buffer_add_indexed grpc_slice_buffer_add_indexed_import
+typedef void(*grpc_slice_buffer_addn_type)(grpc_slice_buffer *sb, grpc_slice *slices, size_t n);
+extern grpc_slice_buffer_addn_type grpc_slice_buffer_addn_import;
+#define grpc_slice_buffer_addn grpc_slice_buffer_addn_import
+typedef uint8_t *(*grpc_slice_buffer_tiny_add_type)(grpc_slice_buffer *sb, size_t len);
+extern grpc_slice_buffer_tiny_add_type grpc_slice_buffer_tiny_add_import;
+#define grpc_slice_buffer_tiny_add grpc_slice_buffer_tiny_add_import
+typedef void(*grpc_slice_buffer_pop_type)(grpc_slice_buffer *sb);
+extern grpc_slice_buffer_pop_type grpc_slice_buffer_pop_import;
+#define grpc_slice_buffer_pop grpc_slice_buffer_pop_import
+typedef void(*grpc_slice_buffer_reset_and_unref_type)(grpc_slice_buffer *sb);
+extern grpc_slice_buffer_reset_and_unref_type grpc_slice_buffer_reset_and_unref_import;
+#define grpc_slice_buffer_reset_and_unref grpc_slice_buffer_reset_and_unref_import
+typedef void(*grpc_slice_buffer_swap_type)(grpc_slice_buffer *a, grpc_slice_buffer *b);
+extern grpc_slice_buffer_swap_type grpc_slice_buffer_swap_import;
+#define grpc_slice_buffer_swap grpc_slice_buffer_swap_import
+typedef void(*grpc_slice_buffer_move_into_type)(grpc_slice_buffer *src, grpc_slice_buffer *dst);
+extern grpc_slice_buffer_move_into_type grpc_slice_buffer_move_into_import;
+#define grpc_slice_buffer_move_into grpc_slice_buffer_move_into_import
+typedef void(*grpc_slice_buffer_trim_end_type)(grpc_slice_buffer *src, size_t n, grpc_slice_buffer *garbage);
+extern grpc_slice_buffer_trim_end_type grpc_slice_buffer_trim_end_import;
+#define grpc_slice_buffer_trim_end grpc_slice_buffer_trim_end_import
+typedef void(*grpc_slice_buffer_move_first_type)(grpc_slice_buffer *src, size_t n, grpc_slice_buffer *dst);
+extern grpc_slice_buffer_move_first_type grpc_slice_buffer_move_first_import;
+#define grpc_slice_buffer_move_first grpc_slice_buffer_move_first_import
+typedef grpc_slice(*grpc_slice_buffer_take_first_type)(grpc_slice_buffer *src);
+extern grpc_slice_buffer_take_first_type grpc_slice_buffer_take_first_import;
+#define grpc_slice_buffer_take_first grpc_slice_buffer_take_first_import
 typedef void *(*gpr_malloc_type)(size_t size);
 extern gpr_malloc_type gpr_malloc_import;
 #define gpr_malloc gpr_malloc_import
@@ -596,7 +689,7 @@ extern gpr_join_host_port_type gpr_join_host_port_import;
 typedef int(*gpr_split_host_port_type)(const char *name, char **host, char **port);
 extern gpr_split_host_port_type gpr_split_host_port_import;
 #define gpr_split_host_port gpr_split_host_port_import
-typedef void(*gpr_log_type)(const char *file, int line, gpr_log_severity severity, const char *format, ...) GPRC_PRINT_FORMAT_CHECK(4, 5);
+typedef void(*gpr_log_type)(const char *file, int line, gpr_log_severity severity, const char *format, ...) GPR_PRINT_FORMAT_CHECK(4, 5);
 extern gpr_log_type gpr_log_import;
 #define gpr_log gpr_log_import
 typedef void(*gpr_log_message_type)(const char *file, int line, gpr_log_severity severity, const char *message);
@@ -614,97 +707,10 @@ extern gpr_set_log_function_type gpr_set_log_function_import;
 typedef char *(*gpr_format_message_type)(int messageid);
 extern gpr_format_message_type gpr_format_message_import;
 #define gpr_format_message gpr_format_message_import
-typedef gpr_slice(*gpr_slice_ref_type)(gpr_slice s);
-extern gpr_slice_ref_type gpr_slice_ref_import;
-#define gpr_slice_ref gpr_slice_ref_import
-typedef void(*gpr_slice_unref_type)(gpr_slice s);
-extern gpr_slice_unref_type gpr_slice_unref_import;
-#define gpr_slice_unref gpr_slice_unref_import
-typedef gpr_slice(*gpr_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
-extern gpr_slice_new_type gpr_slice_new_import;
-#define gpr_slice_new gpr_slice_new_import
-typedef gpr_slice(*gpr_slice_new_with_user_data_type)(void *p, size_t len, void (*destroy)(void *), void *user_data);
-extern gpr_slice_new_with_user_data_type gpr_slice_new_with_user_data_import;
-#define gpr_slice_new_with_user_data gpr_slice_new_with_user_data_import
-typedef gpr_slice(*gpr_slice_new_with_len_type)(void *p, size_t len, void (*destroy)(void *, size_t));
-extern gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
-#define gpr_slice_new_with_len gpr_slice_new_with_len_import
-typedef gpr_slice(*gpr_slice_malloc_type)(size_t length);
-extern gpr_slice_malloc_type gpr_slice_malloc_import;
-#define gpr_slice_malloc gpr_slice_malloc_import
-typedef gpr_slice(*gpr_slice_from_copied_string_type)(const char *source);
-extern gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
-#define gpr_slice_from_copied_string gpr_slice_from_copied_string_import
-typedef gpr_slice(*gpr_slice_from_copied_buffer_type)(const char *source, size_t len);
-extern gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
-#define gpr_slice_from_copied_buffer gpr_slice_from_copied_buffer_import
-typedef gpr_slice(*gpr_slice_from_static_string_type)(const char *source);
-extern gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
-#define gpr_slice_from_static_string gpr_slice_from_static_string_import
-typedef gpr_slice(*gpr_slice_sub_type)(gpr_slice s, size_t begin, size_t end);
-extern gpr_slice_sub_type gpr_slice_sub_import;
-#define gpr_slice_sub gpr_slice_sub_import
-typedef gpr_slice(*gpr_slice_sub_no_ref_type)(gpr_slice s, size_t begin, size_t end);
-extern gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
-#define gpr_slice_sub_no_ref gpr_slice_sub_no_ref_import
-typedef gpr_slice(*gpr_slice_split_tail_type)(gpr_slice *s, size_t split);
-extern gpr_slice_split_tail_type gpr_slice_split_tail_import;
-#define gpr_slice_split_tail gpr_slice_split_tail_import
-typedef gpr_slice(*gpr_slice_split_head_type)(gpr_slice *s, size_t split);
-extern gpr_slice_split_head_type gpr_slice_split_head_import;
-#define gpr_slice_split_head gpr_slice_split_head_import
-typedef gpr_slice(*gpr_empty_slice_type)(void);
-extern gpr_empty_slice_type gpr_empty_slice_import;
-#define gpr_empty_slice gpr_empty_slice_import
-typedef int(*gpr_slice_cmp_type)(gpr_slice a, gpr_slice b);
-extern gpr_slice_cmp_type gpr_slice_cmp_import;
-#define gpr_slice_cmp gpr_slice_cmp_import
-typedef int(*gpr_slice_str_cmp_type)(gpr_slice a, const char *b);
-extern gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
-#define gpr_slice_str_cmp gpr_slice_str_cmp_import
-typedef void(*gpr_slice_buffer_init_type)(gpr_slice_buffer *sb);
-extern gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
-#define gpr_slice_buffer_init gpr_slice_buffer_init_import
-typedef void(*gpr_slice_buffer_destroy_type)(gpr_slice_buffer *sb);
-extern gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
-#define gpr_slice_buffer_destroy gpr_slice_buffer_destroy_import
-typedef void(*gpr_slice_buffer_add_type)(gpr_slice_buffer *sb, gpr_slice slice);
-extern gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
-#define gpr_slice_buffer_add gpr_slice_buffer_add_import
-typedef size_t(*gpr_slice_buffer_add_indexed_type)(gpr_slice_buffer *sb, gpr_slice slice);
-extern gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
-#define gpr_slice_buffer_add_indexed gpr_slice_buffer_add_indexed_import
-typedef void(*gpr_slice_buffer_addn_type)(gpr_slice_buffer *sb, gpr_slice *slices, size_t n);
-extern gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
-#define gpr_slice_buffer_addn gpr_slice_buffer_addn_import
-typedef uint8_t *(*gpr_slice_buffer_tiny_add_type)(gpr_slice_buffer *sb, size_t len);
-extern gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
-#define gpr_slice_buffer_tiny_add gpr_slice_buffer_tiny_add_import
-typedef void(*gpr_slice_buffer_pop_type)(gpr_slice_buffer *sb);
-extern gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
-#define gpr_slice_buffer_pop gpr_slice_buffer_pop_import
-typedef void(*gpr_slice_buffer_reset_and_unref_type)(gpr_slice_buffer *sb);
-extern gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
-#define gpr_slice_buffer_reset_and_unref gpr_slice_buffer_reset_and_unref_import
-typedef void(*gpr_slice_buffer_swap_type)(gpr_slice_buffer *a, gpr_slice_buffer *b);
-extern gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
-#define gpr_slice_buffer_swap gpr_slice_buffer_swap_import
-typedef void(*gpr_slice_buffer_move_into_type)(gpr_slice_buffer *src, gpr_slice_buffer *dst);
-extern gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
-#define gpr_slice_buffer_move_into gpr_slice_buffer_move_into_import
-typedef void(*gpr_slice_buffer_trim_end_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *garbage);
-extern gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
-#define gpr_slice_buffer_trim_end gpr_slice_buffer_trim_end_import
-typedef void(*gpr_slice_buffer_move_first_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *dst);
-extern gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
-#define gpr_slice_buffer_move_first gpr_slice_buffer_move_first_import
-typedef gpr_slice(*gpr_slice_buffer_take_first_type)(gpr_slice_buffer *src);
-extern gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
-#define gpr_slice_buffer_take_first gpr_slice_buffer_take_first_import
 typedef char *(*gpr_strdup_type)(const char *src);
 extern gpr_strdup_type gpr_strdup_import;
 #define gpr_strdup gpr_strdup_import
-typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...) GPRC_PRINT_FORMAT_CHECK(2, 3);
+typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...) GPR_PRINT_FORMAT_CHECK(2, 3);
 extern gpr_asprintf_type gpr_asprintf_import;
 #define gpr_asprintf gpr_asprintf_import
 typedef const char *(*gpr_subprocess_binary_extension_type)();
diff --git a/src/ruby/ext/grpc/rb_server.c b/src/ruby/ext/grpc/rb_server.c
index 2a6a246e67..c7b112c94b 100644
--- a/src/ruby/ext/grpc/rb_server.c
+++ b/src/ruby/ext/grpc/rb_server.c
@@ -37,6 +37,7 @@
 #include "rb_server.h"
 
 #include <grpc/grpc.h>
+#include <grpc/support/atm.h>
 #include <grpc/grpc_security.h>
 #include <grpc/support/log.h>
 #include "rb_call.h"
@@ -59,22 +60,26 @@ typedef struct grpc_rb_server {
   /* The actual server */
   grpc_server *wrapped;
   grpc_completion_queue *queue;
+  gpr_atm shutdown_started;
 } grpc_rb_server;
 
 static void destroy_server(grpc_rb_server *server, gpr_timespec deadline) {
   grpc_event ev;
-  if (server->wrapped != NULL) {
-    grpc_server_shutdown_and_notify(server->wrapped, server->queue, NULL);
-    ev = rb_completion_queue_pluck(server->queue, NULL, deadline, NULL);
-    if (ev.type == GRPC_QUEUE_TIMEOUT) {
-      grpc_server_cancel_all_calls(server->wrapped);
-      rb_completion_queue_pluck(server->queue, NULL,
-                                gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  // This can be started by app or implicitly by GC. Avoid a race between these.
+  if (gpr_atm_full_fetch_add(&server->shutdown_started, (gpr_atm)1) == 0) {
+    if (server->wrapped != NULL) {
+      grpc_server_shutdown_and_notify(server->wrapped, server->queue, NULL);
+      ev = rb_completion_queue_pluck(server->queue, NULL, deadline, NULL);
+      if (ev.type == GRPC_QUEUE_TIMEOUT) {
+        grpc_server_cancel_all_calls(server->wrapped);
+        rb_completion_queue_pluck(server->queue, NULL,
+                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+      }
+      grpc_server_destroy(server->wrapped);
+      grpc_rb_completion_queue_destroy(server->queue);
+      server->wrapped = NULL;
+      server->queue = NULL;
     }
-    grpc_server_destroy(server->wrapped);
-    grpc_rb_completion_queue_destroy(server->queue);
-    server->wrapped = NULL;
-    server->queue = NULL;
   }
 }
 
@@ -115,6 +120,7 @@ static const rb_data_type_t grpc_rb_server_data_type = {
 static VALUE grpc_rb_server_alloc(VALUE cls) {
   grpc_rb_server *wrapper = ALLOC(grpc_rb_server);
   wrapper->wrapped = NULL;
+  wrapper->shutdown_started = (gpr_atm)0;
   return TypedData_Wrap_Struct(cls, &grpc_rb_server_data_type, wrapper);
 }
 
diff --git a/src/ruby/lib/grpc/errors.rb b/src/ruby/lib/grpc/errors.rb
index 23b2bb7e12..f6998e17c4 100644
--- a/src/ruby/lib/grpc/errors.rb
+++ b/src/ruby/lib/grpc/errors.rb
@@ -35,9 +35,18 @@ module GRPC
   # either end of a GRPC connection.  When raised, it indicates that a status
   # error should be returned to the other end of a GRPC connection; when
   # caught it means that this end received a status error.
+  #
+  # There is also subclass of BadStatus in this module for each GRPC status.
+  # E.g., the GRPC::Cancelled class corresponds to status CANCELLED.
+  #
+  # See
+  # https://github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/status.h
+  # for detailed descriptions of each status code.
   class BadStatus < StandardError
     attr_reader :code, :details, :metadata
 
+    include GRPC::Core::StatusCodes
+
     # @param code [Numeric] the status code
     # @param details [String] the details of the exception
     # @param metadata [Hash] the error's metadata
@@ -55,9 +64,152 @@ module GRPC
     def to_status
       Struct::Status.new(code, details, @metadata)
     end
+
+    def self.new_status_exception(code, details = 'unkown cause', metadata = {})
+      codes = {}
+      codes[OK] = Ok
+      codes[CANCELLED] = Cancelled
+      codes[UNKNOWN] = Unknown
+      codes[INVALID_ARGUMENT] = InvalidArgument
+      codes[DEADLINE_EXCEEDED] = DeadlineExceeded
+      codes[NOT_FOUND] = NotFound
+      codes[ALREADY_EXISTS] = AlreadyExists
+      codes[PERMISSION_DENIED] =  PermissionDenied
+      codes[UNAUTHENTICATED] = Unauthenticated
+      codes[RESOURCE_EXHAUSTED] = ResourceExhausted
+      codes[FAILED_PRECONDITION] = FailedPrecondition
+      codes[ABORTED] = Aborted
+      codes[OUT_OF_RANGE] = OutOfRange
+      codes[UNIMPLEMENTED] =  Unimplemented
+      codes[INTERNAL] = Internal
+      codes[UNIMPLEMENTED] =  Unimplemented
+      codes[UNAVAILABLE] =  Unavailable
+      codes[DATA_LOSS] = DataLoss
+
+      if codes[code].nil?
+        BadStatus.new(code, details, metadata)
+      else
+        codes[code].new(details, metadata)
+      end
+    end
+  end
+
+  # GRPC status code corresponding to status OK
+  class Ok < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::OK, details, metadata)
+    end
   end
 
-  # Cancelled is an exception class that indicates that an rpc was cancelled.
-  class Cancelled < StandardError
+  # GRPC status code corresponding to status CANCELLED
+  class Cancelled < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::CANCELLED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status UNKNOWN
+  class Unknown < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::UNKNOWN, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status INVALID_ARGUMENT
+  class InvalidArgument < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::INVALID_ARGUMENT, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status DEADLINE_EXCEEDED
+  class DeadlineExceeded < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::DEADLINE_EXCEEDED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status NOT_FOUND
+  class NotFound < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::NOT_FOUND, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status ALREADY_EXISTS
+  class AlreadyExists < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::ALREADY_EXISTS, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status PERMISSION_DENIED
+  class PermissionDenied < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::PERMISSION_DENIED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status UNAUTHENTICATED
+  class Unauthenticated < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::UNAUTHENTICATED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status RESOURCE_EXHAUSTED
+  class ResourceExhausted < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::RESOURCE_EXHAUSTED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status FAILED_PRECONDITION
+  class FailedPrecondition < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::FAILED_PRECONDITION, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status ABORTED
+  class Aborted < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::ABORTED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status OUT_OF_RANGE
+  class OutOfRange < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::OUT_OF_RANGE, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status UNIMPLEMENTED
+  class Unimplemented < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::UNIMPLEMENTED, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status INTERNAL
+  class Internal < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::INTERNAL, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status UNAVAILABLE
+  class Unavailable < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::UNAVAILABLE, details, metadata)
+    end
+  end
+
+  # GRPC status code corresponding to status DATA_LOSS
+  class DataLoss < BadStatus
+    def initialize(details = 'unknown cause', metadata = {})
+      super(Core::StatusCodes::DATA_LOSS, details, metadata)
+    end
   end
 end
diff --git a/src/ruby/lib/grpc/generic/active_call.rb b/src/ruby/lib/grpc/generic/active_call.rb
index f5c426ebfc..3b31f77ec0 100644
--- a/src/ruby/lib/grpc/generic/active_call.rb
+++ b/src/ruby/lib/grpc/generic/active_call.rb
@@ -43,8 +43,8 @@ class Struct
         GRPC.logger.debug("Failing with status #{status}")
         # raise BadStatus, propagating the metadata if present.
         md = status.metadata
-        fail GRPC::BadStatus.new(status.code, status.details, md),
-             "status code: #{status.code}, details: #{status.details}"
+        fail GRPC::BadStatus.new_status_exception(
+          status.code, status.details, md)
       end
       status
     end
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index d7cd9e6df2..8943f3f1fe 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -219,6 +219,10 @@ module GRPC
       GRPC.logger.debug('bidi-read-loop: finished')
       @reads_complete = true
       finished
+      # Make sure that the write loop is done done before finishing the call.
+      # Note that blocking is ok at this point because we've already received
+      # a status
+      @enq_th.join if is_client
     end
   end
 end
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index cd17aed8e7..d46c4a1b5c 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -119,7 +119,7 @@ module GRPC
       # Send back a UNKNOWN status to the client
       GRPC.logger.warn("failed handler: #{active_call}; sending status:UNKNOWN")
       GRPC.logger.warn(e)
-      send_status(active_call, UNKNOWN, 'unkown error handling call on server')
+      send_status(active_call, UNKNOWN, "#{e.class}: #{e.message}")
     end
 
     def assert_arity_matches(mth)
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 7dbcb7d479..00e0db71be 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -31,10 +31,133 @@ require_relative '../grpc'
 require_relative 'active_call'
 require_relative 'service'
 require 'thread'
-require 'concurrent'
 
 # GRPC contains the General RPC module.
 module GRPC
+  # Pool is a simple thread pool.
+  class Pool
+    # Default keep alive period is 1s
+    DEFAULT_KEEP_ALIVE = 1
+
+    def initialize(size, keep_alive: DEFAULT_KEEP_ALIVE)
+      fail 'pool size must be positive' unless size > 0
+      @jobs = Queue.new
+      @size = size
+      @stopped = false
+      @stop_mutex = Mutex.new # needs to be held when accessing @stopped
+      @stop_cond = ConditionVariable.new
+      @workers = []
+      @keep_alive = keep_alive
+
+      # Each worker thread has its own queue to push and pull jobs
+      # these queues are put into @ready_queues when that worker is idle
+      @ready_workers = Queue.new
+    end
+
+    # Returns the number of jobs waiting
+    def jobs_waiting
+      @jobs.size
+    end
+
+    def ready_for_work?
+      # Busy worker threads are either doing work, or have a single job
+      # waiting on them. Workers that are idle with no jobs waiting
+      # have their "queues" in @ready_workers
+      !@ready_workers.empty?
+    end
+
+    # Runs the given block on the queue with the provided args.
+    #
+    # @param args the args passed blk when it is called
+    # @param blk the block to call
+    def schedule(*args, &blk)
+      return if blk.nil?
+      @stop_mutex.synchronize do
+        if @stopped
+          GRPC.logger.warn('did not schedule job, already stopped')
+          return
+        end
+        GRPC.logger.info('schedule another job')
+        fail 'No worker threads available' if @ready_workers.empty?
+        worker_queue = @ready_workers.pop
+
+        fail 'worker already has a task waiting' unless worker_queue.empty?
+        worker_queue << [blk, args]
+      end
+    end
+
+    # Starts running the jobs in the thread pool.
+    def start
+      @stop_mutex.synchronize do
+        fail 'already stopped' if @stopped
+      end
+      until @workers.size == @size.to_i
+        new_worker_queue = Queue.new
+        @ready_workers << new_worker_queue
+        next_thread = Thread.new(new_worker_queue) do |jobs|
+          catch(:exit) do  # allows { throw :exit } to kill a thread
+            loop_execute_jobs(jobs)
+          end
+          remove_current_thread
+        end
+        @workers << next_thread
+      end
+    end
+
+    # Stops the jobs in the pool
+    def stop
+      GRPC.logger.info('stopping, will wait for all the workers to exit')
+      schedule { throw :exit } while ready_for_work?
+      @stop_mutex.synchronize do  # wait @keep_alive for works to stop
+        @stopped = true
+        @stop_cond.wait(@stop_mutex, @keep_alive) if @workers.size > 0
+      end
+      forcibly_stop_workers
+      GRPC.logger.info('stopped, all workers are shutdown')
+    end
+
+    protected
+
+    # Forcibly shutdown any threads that are still alive.
+    def forcibly_stop_workers
+      return unless @workers.size > 0
+      GRPC.logger.info("forcibly terminating #{@workers.size} worker(s)")
+      @workers.each do |t|
+        next unless t.alive?
+        begin
+          t.exit
+        rescue StandardError => e
+          GRPC.logger.warn('error while terminating a worker')
+          GRPC.logger.warn(e)
+        end
+      end
+    end
+
+    # removes the threads from workers, and signal when all the
+    # threads are complete.
+    def remove_current_thread
+      @stop_mutex.synchronize do
+        @workers.delete(Thread.current)
+        @stop_cond.signal if @workers.size.zero?
+      end
+    end
+
+    def loop_execute_jobs(worker_queue)
+      loop do
+        begin
+          blk, args = worker_queue.pop
+          blk.call(*args)
+        rescue StandardError => e
+          GRPC.logger.warn('Error in worker thread')
+          GRPC.logger.warn(e)
+        end
+        # there shouldn't be any work given to this thread while its busy
+        fail('received a task while busy') unless worker_queue.empty?
+        @ready_workers << worker_queue
+      end
+    end
+  end
+
   # RpcServer hosts a number of services and makes them available on the
   # network.
   class RpcServer
@@ -44,14 +167,11 @@ module GRPC
 
     def_delegators :@server, :add_http2_port
 
-    # Default max size of the thread pool size is 100
-    DEFAULT_MAX_POOL_SIZE = 100
-
-    # Default minimum size of the thread pool is 5
-    DEFAULT_MIN_POOL_SIZE = 5
+    # Default thread pool size is 30
+    DEFAULT_POOL_SIZE = 30
 
-    # Default max_waiting_requests size is 60
-    DEFAULT_MAX_WAITING_REQUESTS = 60
+    # Deprecated due to internal changes to the thread pool
+    DEFAULT_MAX_WAITING_REQUESTS = 20
 
     # Default poll period is 1s
     DEFAULT_POLL_PERIOD = 1
@@ -74,12 +194,12 @@ module GRPC
     # There are some specific keyword args used to configure the RpcServer
     # instance.
     #
-    # * pool_size: the maximum size of the thread pool that the server's
-    # thread pool can reach.
+    # * pool_size: the size of the thread pool the server uses to run its
+    # threads. No more concurrent requests can be made than the size
+    # of the thread pool
     #
-    # * max_waiting_requests: the maximum number of requests that are not
-    # being handled to allow. When this limit is exceeded, the server responds
-    # with not available to new requests
+    # * max_waiting_requests: Deprecated due to internal changes to the thread
+    # pool. This is still an argument for compatibility but is ignored.
     #
     # * poll_period: when present, the server polls for new events with this
     # period
@@ -91,8 +211,7 @@ module GRPC
     #
     # * server_args:
     # A server arguments hash to be passed down to the underlying core server
-    def initialize(pool_size:DEFAULT_MAX_POOL_SIZE,
-                   min_pool_size:DEFAULT_MIN_POOL_SIZE,
+    def initialize(pool_size:DEFAULT_POOL_SIZE,
                    max_waiting_requests:DEFAULT_MAX_WAITING_REQUESTS,
                    poll_period:DEFAULT_POLL_PERIOD,
                    connect_md_proc:nil,
@@ -100,12 +219,8 @@ module GRPC
       @connect_md_proc = RpcServer.setup_connect_md_proc(connect_md_proc)
       @max_waiting_requests = max_waiting_requests
       @poll_period = poll_period
-
-      @pool = Concurrent::ThreadPoolExecutor.new(
-        min_threads: [min_pool_size, pool_size].min,
-        max_threads: pool_size,
-        max_queue: max_waiting_requests,
-        fallback_policy: :discard)
+      @pool_size = pool_size
+      @pool = Pool.new(@pool_size)
       @run_cond = ConditionVariable.new
       @run_mutex = Mutex.new
       # running_state can take 4 values: :not_started, :running, :stopping, and
@@ -126,8 +241,7 @@ module GRPC
       end
       deadline = from_relative_time(@poll_period)
       @server.close(deadline)
-      @pool.shutdown
-      @pool.wait_for_termination
+      @pool.stop
     end
 
     def running_state
@@ -224,6 +338,7 @@ module GRPC
     def run
       @run_mutex.synchronize do
         fail 'cannot run without registering services' if rpc_descs.size.zero?
+        @pool.start
         @server.start
         transition_running_state(:running)
         @run_cond.broadcast
@@ -235,12 +350,8 @@ module GRPC
 
     # Sends RESOURCE_EXHAUSTED if there are too many unprocessed jobs
     def available?(an_rpc)
-      jobs_count, max = @pool.queue_length, @pool.max_queue
-      GRPC.logger.info("waiting: #{jobs_count}, max: #{max}")
-
-      # remaining capacity for ThreadPoolExecutors is -1 if unbounded
-      return an_rpc if @pool.remaining_capacity != 0
-      GRPC.logger.warn("NOT AVAILABLE: too many jobs_waiting: #{an_rpc}")
+      return an_rpc if @pool.ready_for_work?
+      GRPC.logger.warn('no free worker threads currently')
       noop = proc { |x| x }
 
       # Create a new active call that knows that metadata hasn't been
@@ -275,7 +386,7 @@ module GRPC
           break if (!an_rpc.nil?) && an_rpc.call.nil?
           active_call = new_active_server_call(an_rpc)
           unless active_call.nil?
-            @pool.post(active_call) do |ac|
+            @pool.schedule(active_call) do |ac|
               c, mth = ac
               begin
                 rpc_descs[mth].run_server_method(c, rpc_handlers[mth])
diff --git a/src/ruby/lib/grpc/generic/service.rb b/src/ruby/lib/grpc/generic/service.rb
index 7cb9f1cc99..84f1ce7520 100644
--- a/src/ruby/lib/grpc/generic/service.rb
+++ b/src/ruby/lib/grpc/generic/service.rb
@@ -110,8 +110,9 @@ module GRPC
         rpc_descs[name] = RpcDesc.new(name, input, output,
                                       marshal_class_method,
                                       unmarshal_class_method)
-        define_method(name) do
-          fail GRPC::BadStatus, GRPC::Core::StatusCodes::UNIMPLEMENTED
+        define_method(GenericService.underscore(name.to_s).to_sym) do
+          fail GRPC::BadStatus.new_status_exception(
+            GRPC::Core::StatusCodes::UNIMPLEMENTED)
         end
       end
 
diff --git a/src/ruby/pb/grpc/health/checker.rb b/src/ruby/pb/grpc/health/checker.rb
index 4bce1744c4..6b2d852ebf 100644
--- a/src/ruby/pb/grpc/health/checker.rb
+++ b/src/ruby/pb/grpc/health/checker.rb
@@ -52,7 +52,9 @@ module Grpc
         @status_mutex.synchronize do
           status = @statuses["#{req.service}"]
         end
-        fail GRPC::BadStatus, StatusCodes::NOT_FOUND if status.nil?
+	if status.nil?
+          fail GRPC::BadStatus.new_status_exception(StatusCodes::NOT_FOUND)
+	end
         HealthCheckResponse.new(status: status)
       end
 
diff --git a/src/ruby/pb/test/client.rb b/src/ruby/pb/test/client.rb
index 1e3ae65630..f101f9d89e 100755
--- a/src/ruby/pb/test/client.rb
+++ b/src/ruby/pb/test/client.rb
@@ -459,11 +459,8 @@ class NamedTests
     deadline = GRPC::Core::TimeConsts::from_relative_time(1)
     resps = @stub.full_duplex_call(enum.each_item, deadline: deadline)
     resps.each { } # wait to receive each request (or timeout)
-    fail 'Should have raised GRPC::BadStatus(DEADLINE_EXCEEDED)'
-  rescue GRPC::BadStatus => e
-    assert("#{__callee__}: status was wrong") do
-      e.code == GRPC::Core::StatusCodes::DEADLINE_EXCEEDED
-    end
+    fail 'Should have raised GRPC::DeadlineExceeded'
+  rescue GRPC::DeadlineExceeded
   end
 
   def empty_stream
diff --git a/src/ruby/qps/client.rb b/src/ruby/qps/client.rb
index 8aed866da5..817192626b 100644
--- a/src/ruby/qps/client.rb
+++ b/src/ruby/qps/client.rb
@@ -134,6 +134,7 @@ class BenchmarkClient
     resp = stub.streaming_call(q.each_item)
     start = Time.now
     q.push(req)
+    pushed_sentinal = false
     resp.each do |r|
       @histogram.add((Time.now-start)*1e9)
       if !@done
@@ -141,8 +142,9 @@ class BenchmarkClient
         start = Time.now
         q.push(req)
       else
-        q.push(self)
-        break
+        q.push(self) unless pushed_sentinal
+	# Continue polling on the responses to consume and release resources
+        pushed_sentinal = true
       end
     end
   end
diff --git a/src/ruby/qps/server.rb b/src/ruby/qps/server.rb
index d0c2073dd1..6175855cd9 100644
--- a/src/ruby/qps/server.rb
+++ b/src/ruby/qps/server.rb
@@ -63,7 +63,9 @@ class BenchmarkServer
       cred = :this_port_is_insecure
     end
     # Make sure server can handle the large number of calls in benchmarks
-    @server = GRPC::RpcServer.new(pool_size: 100, max_waiting_requests: 100)
+    # TODO: @apolcyn, if scenario config increases total outstanding
+    # calls then will need to increase the pool size too
+    @server = GRPC::RpcServer.new(pool_size: 1024, max_waiting_requests: 1024)
     @port = @server.add_http2_port("0.0.0.0:" + port.to_s, cred)
     @server.handle(BenchmarkServiceImpl.new)
     @start_time = Time.now
diff --git a/src/ruby/spec/error_sanity_spec.rb b/src/ruby/spec/error_sanity_spec.rb
new file mode 100644
index 0000000000..77e94a8816
--- /dev/null
+++ b/src/ruby/spec/error_sanity_spec.rb
@@ -0,0 +1,64 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'grpc'
+
+StatusCodes = GRPC::Core::StatusCodes
+
+describe StatusCodes do
+  # convert upper snake-case to camel case.
+  # e.g., DEADLINE_EXCEEDED -> DeadlineExceeded
+  def upper_snake_to_camel(name)
+    name.to_s.split('_').map(&:downcase).map(&:capitalize).join('')
+  end
+
+  StatusCodes.constants.each do |status_name|
+    it 'there is a subclass of BadStatus corresponding to StatusCode: ' \
+      "#{status_name} that has code: #{StatusCodes.const_get(status_name)}" do
+      camel_case = upper_snake_to_camel(status_name)
+      error_class = GRPC.const_get(camel_case)
+      # expect the error class to be a subclass of BadStatus
+      expect(error_class < GRPC::BadStatus)
+
+      error_object = error_class.new
+      # check that the code matches the int value of the error's constant
+      status_code = StatusCodes.const_get(status_name)
+      expect(error_object.code).to eq(status_code)
+
+      # check default parameters
+      expect(error_object.details).to eq('unknown cause')
+      expect(error_object.metadata).to eq({})
+
+      # check that the BadStatus factory for creates the correct
+      # exception too
+      from_factory = GRPC::BadStatus.new_status_exception(status_code)
+      expect(from_factory.is_a?(error_class)).to be(true)
+    end
+  end
+end
diff --git a/src/ruby/spec/generic/client_stub_spec.rb b/src/ruby/spec/generic/client_stub_spec.rb
index e68b8db7ab..b51b291cbd 100644
--- a/src/ruby/spec/generic/client_stub_spec.rb
+++ b/src/ruby/spec/generic/client_stub_spec.rb
@@ -168,23 +168,60 @@ describe 'ClientStub' do
         expect(&blk).to raise_error(GRPC::BadStatus)
         th.join
       end
+
+      it 'should receive UNAUTHENTICATED if call credentials plugin fails' do
+        server_port = create_secure_test_server
+        th = run_request_response(@sent_msg, @resp, @pass)
+
+        certs = load_test_certs
+        secure_channel_creds = GRPC::Core::ChannelCredentials.new(
+          certs[0], nil, nil)
+        secure_stub_opts = {
+          channel_args: {
+            GRPC::Core::Channel::SSL_TARGET => 'foo.test.google.fr'
+          }
+        }
+        stub = GRPC::ClientStub.new("localhost:#{server_port}",
+                                    secure_channel_creds, **secure_stub_opts)
+
+        error_message = 'Failing call credentials callback'
+        failing_auth = proc do
+          fail error_message
+        end
+        creds = GRPC::Core::CallCredentials.new(failing_auth)
+
+        unauth_error_occured = false
+        begin
+          get_response(stub, credentials: creds)
+        rescue GRPC::Unauthenticated => e
+          unauth_error_occured = true
+          expect(e.details.include?(error_message)).to be true
+        end
+        expect(unauth_error_occured).to eq(true)
+
+        # Kill the server thread so tests can complete
+        th.kill
+      end
     end
 
     describe 'without a call operation' do
-      def get_response(stub)
+      def get_response(stub, credentials: nil)
+        puts credentials.inspect
         stub.request_response(@method, @sent_msg, noop, noop,
-                              metadata: { k1: 'v1', k2: 'v2' })
+                              metadata: { k1: 'v1', k2: 'v2' },
+                              credentials: credentials)
       end
 
       it_behaves_like 'request response'
     end
 
     describe 'via a call operation' do
-      def get_response(stub, run_start_call_first: false)
+      def get_response(stub, run_start_call_first: false, credentials: nil)
         op = stub.request_response(@method, @sent_msg, noop, noop,
                                    return_op: true,
                                    metadata: { k1: 'v1', k2: 'v2' },
-                                   deadline: from_relative_time(2))
+                                   deadline: from_relative_time(2),
+                                   credentials: credentials)
         expect(op).to be_a(GRPC::ActiveCall::Operation)
         op.start_call if run_start_call_first
         result = op.execute
@@ -492,6 +529,15 @@ describe 'ClientStub' do
     end
   end
 
+  def create_secure_test_server
+    certs = load_test_certs
+    secure_credentials = GRPC::Core::ServerCredentials.new(
+      nil, [{ private_key: certs[1], cert_chain: certs[2] }], false)
+
+    @server = GRPC::Core::Server.new(nil)
+    @server.add_http2_port('0.0.0.0:0', secure_credentials)
+  end
+
   def create_test_server
     @server = GRPC::Core::Server.new(nil)
     @server.add_http2_port('0.0.0.0:0', :this_port_is_insecure)
diff --git a/src/ruby/spec/generic/rpc_desc_spec.rb b/src/ruby/spec/generic/rpc_desc_spec.rb
index a3f0efa603..1ace7211e9 100644
--- a/src/ruby/spec/generic/rpc_desc_spec.rb
+++ b/src/ruby/spec/generic/rpc_desc_spec.rb
@@ -48,7 +48,6 @@ describe GRPC::RpcDesc do
     @bidi_streamer = RpcDesc.new('ss', Stream.new(Object.new),
                                  Stream.new(Object.new), 'encode', 'decode')
     @bs_code = INTERNAL
-    @no_reason = 'unkown error handling call on server'
     @ok_response = Object.new
   end
 
@@ -62,8 +61,9 @@ describe GRPC::RpcDesc do
 
     it 'sends status UNKNOWN if other StandardErrors are raised' do
       expect(@call).to receive(:remote_read).once.and_return(Object.new)
-      expect(@call).to receive(:send_status) .once.with(UNKNOWN, @no_reason,
-                                                        false, metadata: {})
+      expect(@call).to receive(:send_status).once.with(UNKNOWN,
+                                                       arg_error_msg,
+                                                       false, metadata: {})
       this_desc.run_server_method(@call, method(:other_error))
     end
 
@@ -112,7 +112,7 @@ describe GRPC::RpcDesc do
       end
 
       it 'sends status UNKNOWN if other StandardErrors are raised' do
-        expect(@call).to receive(:send_status).once.with(UNKNOWN, @no_reason,
+        expect(@call).to receive(:send_status).once.with(UNKNOWN, arg_error_msg,
                                                          false, metadata: {})
         @client_streamer.run_server_method(@call, method(:other_error_alt))
       end
@@ -174,8 +174,9 @@ describe GRPC::RpcDesc do
       end
 
       it 'sends status UNKNOWN if other StandardErrors are raised' do
+        error_msg = arg_error_msg(StandardError.new)
         expect(@call).to receive(:run_server_bidi).and_raise(StandardError)
-        expect(@call).to receive(:send_status).once.with(UNKNOWN, @no_reason,
+        expect(@call).to receive(:send_status).once.with(UNKNOWN, error_msg,
                                                          false, metadata: {})
         @bidi_streamer.run_server_method(@call, method(:other_error_alt))
       end
@@ -342,4 +343,9 @@ describe GRPC::RpcDesc do
   def other_error_alt(_call)
     fail(ArgumentError, 'other error')
   end
+
+  def arg_error_msg(error = nil)
+    error ||= ArgumentError.new('other error')
+    "#{error.class}: #{error.message}"
+  end
 end
diff --git a/src/ruby/spec/generic/rpc_server_pool_spec.rb b/src/ruby/spec/generic/rpc_server_pool_spec.rb
new file mode 100644
index 0000000000..48ccaee510
--- /dev/null
+++ b/src/ruby/spec/generic/rpc_server_pool_spec.rb
@@ -0,0 +1,144 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'grpc'
+
+Thread.abort_on_exception = true
+
+describe GRPC::Pool do
+  Pool = GRPC::Pool
+
+  describe '#new' do
+    it 'raises if a non-positive size is used' do
+      expect { Pool.new(0) }.to raise_error
+      expect { Pool.new(-1) }.to raise_error
+      expect { Pool.new(Object.new) }.to raise_error
+    end
+
+    it 'is constructed OK with a positive size' do
+      expect { Pool.new(1) }.not_to raise_error
+    end
+  end
+
+  describe '#ready_for_work?' do
+    it 'before start it is not ready' do
+      p = Pool.new(1)
+      expect(p.ready_for_work?).to be(false)
+    end
+
+    it 'it stops being ready after all workers jobs waiting or running' do
+      p = Pool.new(5)
+      p.start
+      job = proc { sleep(3) } # sleep so workers busy when done scheduling
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect(p.ready_for_work?).to be(false)
+    end
+
+    it 'it becomes ready again after jobs complete' do
+      p = Pool.new(5)
+      p.start
+      job = proc {}
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect(p.ready_for_work?).to be(false)
+      sleep 5 # give the pool time do get at least one task done
+      expect(p.ready_for_work?).to be(true)
+    end
+  end
+
+  describe '#schedule' do
+    it 'return if the pool is already stopped' do
+      p = Pool.new(1)
+      p.stop
+      job = proc {}
+      expect { p.schedule(&job) }.to_not raise_error
+    end
+
+    it 'adds jobs that get run by the pool' do
+      p = Pool.new(1)
+      p.start
+      o, q = Object.new, Queue.new
+      job = proc { q.push(o) }
+      p.schedule(&job)
+      expect(q.pop).to be(o)
+      p.stop
+    end
+
+    it 'it throws an error if all of the workers have tasks to do' do
+      p = Pool.new(5)
+      p.start
+      job = proc {}
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect { p.schedule(&job) }.to raise_error
+      expect { p.schedule(&job) }.to raise_error
+    end
+  end
+
+  describe '#stop' do
+    it 'works when there are no scheduled tasks' do
+      p = Pool.new(1)
+      expect { p.stop }.not_to raise_error
+    end
+
+    it 'stops jobs when there are long running jobs' do
+      p = Pool.new(1)
+      p.start
+      o, q = Object.new, Queue.new
+      job = proc do
+        sleep(5)  # long running
+        q.push(o)
+      end
+      p.schedule(&job)
+      sleep(1)  # should ensure the long job gets scheduled
+      expect { p.stop }.not_to raise_error
+    end
+  end
+
+  describe '#start' do
+    it 'runs jobs as they are scheduled' do
+      p = Pool.new(5)
+      o, q = Object.new, Queue.new
+      p.start
+      n = 5  # arbitrary
+      n.times do
+        p.schedule(o, &q.method(:push))
+        expect(q.pop).to be(o)
+      end
+      p.stop
+    end
+  end
+end
diff --git a/src/ruby/spec/generic/rpc_server_spec.rb b/src/ruby/spec/generic/rpc_server_spec.rb
index c5694790fd..806ea8ce9f 100644
--- a/src/ruby/spec/generic/rpc_server_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_spec.rb
@@ -408,21 +408,21 @@ describe GRPC::RpcServer do
         req = EchoMsg.new
         n = 20 # arbitrary, use as many to ensure the server pool is exceeded
         threads = []
-        bad_status_code = nil
+        one_failed_as_unavailable = false
         n.times do
           threads << Thread.new do
             stub = SlowStub.new(alt_host, :this_channel_is_insecure)
             begin
               stub.an_rpc(req)
-            rescue GRPC::BadStatus => e
-              bad_status_code = e.code
+            rescue GRPC::ResourceExhausted
+              one_failed_as_unavailable = true
             end
           end
         end
         threads.each(&:join)
         alt_srv.stop
         t.join
-        expect(bad_status_code).to be(StatusCodes::RESOURCE_EXHAUSTED)
+        expect(one_failed_as_unavailable).to be(true)
       end
     end
 
diff --git a/src/ruby/spec/pb/health/checker_spec.rb b/src/ruby/spec/pb/health/checker_spec.rb
index 4711e09e88..719510001c 100644
--- a/src/ruby/spec/pb/health/checker_spec.rb
+++ b/src/ruby/spec/pb/health/checker_spec.rb
@@ -122,7 +122,7 @@ describe Grpc::Health::Checker do
           checker.check(HCReq.new(service: t[:service]), nil)
         end
         expected_msg = /#{StatusCodes::NOT_FOUND}/
-        expect(&blk).to raise_error GRPC::BadStatus, expected_msg
+        expect(&blk).to raise_error GRPC::NotFound, expected_msg
       end
     end
   end
@@ -141,7 +141,7 @@ describe Grpc::Health::Checker do
           checker.check(HCReq.new(service: t[:service]), nil)
         end
         expected_msg = /#{StatusCodes::NOT_FOUND}/
-        expect(&blk).to raise_error GRPC::BadStatus, expected_msg
+        expect(&blk).to raise_error GRPC::NotFound, expected_msg
       end
     end
   end
@@ -163,7 +163,7 @@ describe Grpc::Health::Checker do
           checker.check(HCReq.new(service: t[:service]), nil)
         end
         expected_msg = /#{StatusCodes::NOT_FOUND}/
-        expect(&blk).to raise_error GRPC::BadStatus, expected_msg
+        expect(&blk).to raise_error GRPC::NotFound, expected_msg
       end
     end
   end
@@ -214,7 +214,7 @@ describe Grpc::Health::Checker do
         stub.check(HCReq.new(service: 'unknown'))
       end
       expected_msg = /#{StatusCodes::NOT_FOUND}/
-      expect(&blk).to raise_error GRPC::BadStatus, expected_msg
+      expect(&blk).to raise_error GRPC::NotFound, expected_msg
       @srv.stop
       t.join
     end
diff --git a/src/ruby/spec/spec_helper.rb b/src/ruby/spec/spec_helper.rb
index c891c1bf5e..c2be0afa72 100644
--- a/src/ruby/spec/spec_helper.rb
+++ b/src/ruby/spec/spec_helper.rb
@@ -67,3 +67,5 @@ RSpec.configure do |config|
 end
 
 RSpec::Expectations.configuration.warn_about_potential_false_positives = false
+
+Thread.abort_on_exception = true