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-rw-r--r--src/core/surface/channel_connectivity.c191
-rw-r--r--src/core/surface/channel_create.c10
-rw-r--r--src/core/surface/init.c2
-rw-r--r--src/core/surface/secure_channel_create.c10
4 files changed, 209 insertions, 4 deletions
diff --git a/src/core/surface/channel_connectivity.c b/src/core/surface/channel_connectivity.c
new file mode 100644
index 0000000000..b6ea86d730
--- /dev/null
+++ b/src/core/surface/channel_connectivity.c
@@ -0,0 +1,191 @@
+/*
+ *
+ * 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/surface/channel.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/channel/client_channel.h"
+#include "src/core/iomgr/alarm.h"
+#include "src/core/surface/completion_queue.h"
+
+grpc_connectivity_state grpc_channel_check_connectivity_state(
+ grpc_channel *channel, int try_to_connect) {
+ /* forward through to the underlying client channel */
+ grpc_channel_element *client_channel_elem =
+ grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
+ if (client_channel_elem->filter != &grpc_client_channel_filter) {
+ gpr_log(GPR_ERROR,
+ "grpc_channel_check_connectivity_state called on something that is "
+ "not a client channel, but '%s'",
+ client_channel_elem->filter->name);
+ return GRPC_CHANNEL_FATAL_FAILURE;
+ }
+ return grpc_client_channel_check_connectivity_state(client_channel_elem,
+ try_to_connect);
+}
+
+typedef enum {
+ WAITING,
+ CALLING_BACK,
+ CALLING_BACK_AND_FINISHED,
+ CALLED_BACK
+} callback_phase;
+
+typedef struct {
+ gpr_mu mu;
+ callback_phase phase;
+ int success;
+ grpc_iomgr_closure on_complete;
+ grpc_alarm alarm;
+ grpc_connectivity_state state;
+ grpc_connectivity_state *optional_new_state;
+ grpc_completion_queue *cq;
+ grpc_cq_completion completion_storage;
+ grpc_channel *channel;
+ void *tag;
+} state_watcher;
+
+static void delete_state_watcher(state_watcher *w) {
+ grpc_channel_element *client_channel_elem =
+ grpc_channel_stack_last_element(grpc_channel_get_channel_stack(w->channel));
+ grpc_client_channel_del_interested_party(client_channel_elem, grpc_cq_pollset(w->cq));
+ GRPC_CHANNEL_INTERNAL_UNREF(w->channel, "watch_connectivity");
+ gpr_mu_destroy(&w->mu);
+ gpr_free(w);
+}
+
+static void finished_completion(void *pw, grpc_cq_completion *ignored) {
+ int delete = 0;
+ state_watcher *w = pw;
+ gpr_mu_lock(&w->mu);
+ switch (w->phase) {
+ case WAITING:
+ case CALLED_BACK:
+ gpr_log(GPR_ERROR, "should never reach here");
+ abort();
+ break;
+ case CALLING_BACK:
+ w->phase = CALLED_BACK;
+ break;
+ case CALLING_BACK_AND_FINISHED:
+ delete = 1;
+ break;
+ }
+ gpr_mu_unlock(&w->mu);
+
+ if (delete) {
+ delete_state_watcher(w);
+ }
+}
+
+static void partly_done(state_watcher *w, int due_to_completion) {
+ int delete = 0;
+
+ if (due_to_completion) {
+ gpr_mu_lock(&w->mu);
+ w->success = 1;
+ gpr_mu_unlock(&w->mu);
+ grpc_alarm_cancel(&w->alarm);
+ }
+
+ gpr_mu_lock(&w->mu);
+ switch (w->phase) {
+ case WAITING:
+ w->phase = CALLING_BACK;
+ if (w->optional_new_state) {
+ *w->optional_new_state = w->state;
+ }
+ grpc_cq_end_op(w->cq, w->tag, w->success, finished_completion, w,
+ &w->completion_storage);
+ break;
+ case CALLING_BACK:
+ w->phase = CALLING_BACK_AND_FINISHED;
+ break;
+ case CALLING_BACK_AND_FINISHED:
+ gpr_log(GPR_ERROR, "should never reach here");
+ abort();
+ break;
+ case CALLED_BACK:
+ delete = 1;
+ break;
+ }
+ gpr_mu_unlock(&w->mu);
+
+ if (delete) {
+ delete_state_watcher(w);
+ }
+}
+
+static void watch_complete(void *pw, int success) { partly_done(pw, 1); }
+
+static void timeout_complete(void *pw, int success) { partly_done(pw, 0); }
+
+void grpc_channel_watch_connectivity_state(
+ grpc_channel *channel, grpc_connectivity_state last_observed_state,
+ grpc_connectivity_state *optional_new_state, gpr_timespec deadline,
+ grpc_completion_queue *cq, void *tag) {
+ grpc_channel_element *client_channel_elem =
+ grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
+ state_watcher *w = gpr_malloc(sizeof(*w));
+
+ grpc_cq_begin_op(cq);
+
+ gpr_mu_init(&w->mu);
+ grpc_iomgr_closure_init(&w->on_complete, watch_complete, w);
+ w->phase = WAITING;
+ w->state = last_observed_state;
+ w->success = 0;
+ w->optional_new_state = optional_new_state;
+ w->cq = cq;
+ w->tag = tag;
+ w->channel = channel;
+
+ grpc_alarm_init(
+ &w->alarm, gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
+ timeout_complete, w, gpr_now(GPR_CLOCK_MONOTONIC));
+
+ if (client_channel_elem->filter != &grpc_client_channel_filter) {
+ gpr_log(GPR_ERROR,
+ "grpc_channel_watch_connectivity_state called on something that is "
+ "not a client channel, but '%s'",
+ client_channel_elem->filter->name);
+ grpc_iomgr_add_delayed_callback(&w->on_complete, 1);
+ } else {
+ GRPC_CHANNEL_INTERNAL_REF(channel, "watch_connectivity");
+ grpc_client_channel_add_interested_party(client_channel_elem, grpc_cq_pollset(cq));
+ grpc_client_channel_watch_connectivity_state(client_channel_elem, &w->state,
+ &w->on_complete);
+ }
+}
diff --git a/src/core/surface/channel_create.c b/src/core/surface/channel_create.c
index 1fd1855c28..707d615688 100644
--- a/src/core/surface/channel_create.c
+++ b/src/core/surface/channel_create.c
@@ -109,6 +109,7 @@ typedef struct {
gpr_refcount refs;
grpc_mdctx *mdctx;
grpc_channel_args *merge_args;
+ grpc_channel *master;
} subchannel_factory;
static void subchannel_factory_ref(grpc_subchannel_factory *scf) {
@@ -119,6 +120,7 @@ static void subchannel_factory_ref(grpc_subchannel_factory *scf) {
static void subchannel_factory_unref(grpc_subchannel_factory *scf) {
subchannel_factory *f = (subchannel_factory *)scf;
if (gpr_unref(&f->refs)) {
+ GRPC_CHANNEL_INTERNAL_UNREF(f->master, "subchannel_factory");
grpc_channel_args_destroy(f->merge_args);
grpc_mdctx_unref(f->mdctx);
gpr_free(f);
@@ -137,6 +139,7 @@ static grpc_subchannel *subchannel_factory_create_subchannel(
gpr_ref_init(&c->refs, 1);
args->mdctx = f->mdctx;
args->args = final_args;
+ args->master = f->master;
s = grpc_subchannel_create(&c->base, args);
grpc_connector_unref(&c->base);
grpc_channel_args_destroy(final_args);
@@ -168,19 +171,22 @@ grpc_channel *grpc_insecure_channel_create(const char *target,
filters[n++] = &grpc_client_channel_filter;
GPR_ASSERT(n <= MAX_FILTERS);
+ channel =
+ grpc_channel_create_from_filters(target, filters, n, args, mdctx, 1);
+
f = gpr_malloc(sizeof(*f));
f->base.vtable = &subchannel_factory_vtable;
gpr_ref_init(&f->refs, 1);
grpc_mdctx_ref(mdctx);
f->mdctx = mdctx;
f->merge_args = grpc_channel_args_copy(args);
+ f->master = channel;
+ GRPC_CHANNEL_INTERNAL_REF(f->master, "subchannel_factory");
resolver = grpc_resolver_create(target, &f->base);
if (!resolver) {
return NULL;
}
- channel =
- grpc_channel_create_from_filters(target, filters, n, args, mdctx, 1);
grpc_client_channel_set_resolver(grpc_channel_get_channel_stack(channel),
resolver);
GRPC_RESOLVER_UNREF(resolver, "create");
diff --git a/src/core/surface/init.c b/src/core/surface/init.c
index 5cba479317..a015262612 100644
--- a/src/core/surface/init.c
+++ b/src/core/surface/init.c
@@ -47,6 +47,7 @@
#include "src/core/surface/init.h"
#include "src/core/surface/surface_trace.h"
#include "src/core/transport/chttp2_transport.h"
+#include "src/core/transport/connectivity_state.h"
static gpr_once g_basic_init = GPR_ONCE_INIT;
static gpr_mu g_init_mu;
@@ -75,6 +76,7 @@ void grpc_init(void) {
grpc_register_tracer("http", &grpc_http_trace);
grpc_register_tracer("flowctl", &grpc_flowctl_trace);
grpc_register_tracer("batch", &grpc_trace_batch);
+ grpc_register_tracer("connectivity_state", &grpc_connectivity_state_trace);
grpc_security_pre_init();
grpc_iomgr_init();
grpc_tracer_init("GRPC_TRACE");
diff --git a/src/core/surface/secure_channel_create.c b/src/core/surface/secure_channel_create.c
index a280311ba0..1f89353025 100644
--- a/src/core/surface/secure_channel_create.c
+++ b/src/core/surface/secure_channel_create.c
@@ -134,6 +134,7 @@ typedef struct {
grpc_mdctx *mdctx;
grpc_channel_args *merge_args;
grpc_channel_security_connector *security_connector;
+ grpc_channel *master;
} subchannel_factory;
static void subchannel_factory_ref(grpc_subchannel_factory *scf) {
@@ -146,6 +147,7 @@ static void subchannel_factory_unref(grpc_subchannel_factory *scf) {
if (gpr_unref(&f->refs)) {
GRPC_SECURITY_CONNECTOR_UNREF(&f->security_connector->base,
"subchannel_factory");
+ GRPC_CHANNEL_INTERNAL_UNREF(f->master, "subchannel_factory");
grpc_channel_args_destroy(f->merge_args);
grpc_mdctx_unref(f->mdctx);
gpr_free(f);
@@ -165,6 +167,7 @@ static grpc_subchannel *subchannel_factory_create_subchannel(
gpr_ref_init(&c->refs, 1);
args->mdctx = f->mdctx;
args->args = final_args;
+ args->master = f->master;
s = grpc_subchannel_create(&c->base, args);
grpc_connector_unref(&c->base);
grpc_channel_args_destroy(final_args);
@@ -218,6 +221,9 @@ grpc_channel *grpc_secure_channel_create(grpc_credentials *creds,
filters[n++] = &grpc_client_channel_filter;
GPR_ASSERT(n <= MAX_FILTERS);
+ channel =
+ grpc_channel_create_from_filters(target, filters, n, args_copy, mdctx, 1);
+
f = gpr_malloc(sizeof(*f));
f->base.vtable = &subchannel_factory_vtable;
gpr_ref_init(&f->refs, 1);
@@ -226,13 +232,13 @@ grpc_channel *grpc_secure_channel_create(grpc_credentials *creds,
GRPC_SECURITY_CONNECTOR_REF(&connector->base, "subchannel_factory");
f->security_connector = connector;
f->merge_args = grpc_channel_args_copy(args_copy);
+ f->master = channel;
+ GRPC_CHANNEL_INTERNAL_REF(channel, "subchannel_factory");
resolver = grpc_resolver_create(target, &f->base);
if (!resolver) {
return NULL;
}
- channel =
- grpc_channel_create_from_filters(target, filters, n, args_copy, mdctx, 1);
grpc_client_channel_set_resolver(grpc_channel_get_channel_stack(channel),
resolver);
GRPC_RESOLVER_UNREF(resolver, "create");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 16:09:31 +0000