1 files changed, 68 insertions, 0 deletions
diff --git a/tensorflow/core/protobuf/master.proto b/tensorflow/core/protobuf/master.proto
index 0437cb1b83..96c91536f7 100644
--- a/tensorflow/core/protobuf/master.proto
+++ b/tensorflow/core/protobuf/master.proto
@@ -23,6 +23,7 @@ option java_package = "org.tensorflow.distruntime";
 
 import "tensorflow/core/framework/device_attributes.proto";
 import "tensorflow/core/framework/graph.proto";
+import "tensorflow/core/framework/tensor.proto";
 import "tensorflow/core/lib/core/error_codes.proto";
 import "tensorflow/core/protobuf/config.proto";
 import "tensorflow/core/protobuf/named_tensor.proto";
@@ -264,3 +265,70 @@ message ListDevicesResponse {
   repeated DeviceAttributes local_device = 1;
   repeated DeviceAttributes remote_device = 2;
 }
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// MakeCallable method request/response protos.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+message MakeCallableRequest {
+  // REQUIRED: session_handle must be returned by a CreateSession call
+  // to the same master service.
+  string session_handle = 1;
+
+  // Options that define the behavior of the created callable.
+  CallableOptions options = 2;
+}
+
+message MakeCallableResponse {
+  // A handle to the created callable.
+  int64 handle = 1;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// RunCallable method request/response protos.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+message RunCallableRequest {
+  // REQUIRED: session_handle must be returned by a CreateSession call
+  // to the same master service.
+  string session_handle = 1;
+  // REQUIRED: handle must be returned by a MakeCallable call to the same
+  // master service.
+  int64 handle = 2;
+
+  // Values of the tensors passed as arguments to the callable, in the order
+  // defined in the CallableOptions.feed field passed to MakeCallable.
+  repeated TensorProto feed = 3;
+}
+
+message RunCallableResponse {
+  // Values of the tensors returned by the callable, in the order defined in the
+  // CallableOptions.fetch field passed to MakeCallable.
+  repeated TensorProto fetch = 1;
+
+  // Returned metadata if requested in the options.
+  RunMetadata metadata = 2;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ReleaseCallable method request/response protos.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+message ReleaseCallableRequest {
+  // REQUIRED: session_handle must be returned by a CreateSession call
+  // to the same master service.
+  string session_handle = 1;
+
+  // REQUIRED: handle must be returned by a MakeCallable call to the same
+  // master service.
+  int64 handle = 2;
+}
+
+message ReleaseCallableResponse {
+}