diff --git a/BUILD b/BUILD
index daff7f0d857..136396788ec 100644
--- a/BUILD
+++ b/BUILD
@@ -1789,6 +1789,7 @@ grpc_cc_library(
"//src/core:connectivity_state",
"//src/core:iomgr_fwd",
"//src/core:ref_counted",
+ "//src/core:resource_quota",
"//src/core:slice",
"//src/core:stats_data",
"//src/core:time",
@@ -1866,6 +1867,7 @@ grpc_cc_library(
"config",
"gpr",
"grpc_base",
+ "grpc_client_channel",
"grpc_public_hdrs",
"legacy_channel",
"ref_counted_ptr",
@@ -1873,6 +1875,7 @@ grpc_cc_library(
"//src/core:arena",
"//src/core:channel_args",
"//src/core:channel_stack_type",
+ "//src/core:experiments",
"//src/core:iomgr_fwd",
"//src/core:ref_counted",
"//src/core:slice",
@@ -3637,6 +3640,7 @@ grpc_cc_library(
grpc_cc_library(
name = "grpc_client_channel",
srcs = [
+ "//src/core:client_channel/client_channel.cc",
"//src/core:client_channel/client_channel_factory.cc",
"//src/core:client_channel/client_channel_filter.cc",
"//src/core:client_channel/client_channel_plugin.cc",
@@ -3649,6 +3653,7 @@ grpc_cc_library(
"//src/core:client_channel/subchannel_stream_client.cc",
],
hdrs = [
+ "//src/core:client_channel/client_channel.h",
"//src/core:client_channel/client_channel_factory.h",
"//src/core:client_channel/client_channel_filter.h",
"//src/core:client_channel/dynamic_filters.h",
@@ -3684,6 +3689,7 @@ grpc_cc_library(
"backoff",
"call_combiner",
"call_tracer",
+ "channel",
"channel_arg_names",
"channelz",
"config",
@@ -3718,6 +3724,8 @@ grpc_cc_library(
"//src/core:arena",
"//src/core:arena_promise",
"//src/core:backend_metric_parser",
+ "//src/core:call_filters",
+ "//src/core:call_spine",
"//src/core:cancel_callback",
"//src/core:channel_args",
"//src/core:channel_fwd",
@@ -3736,12 +3744,15 @@ grpc_cc_library(
"//src/core:env",
"//src/core:error",
"//src/core:error_utils",
+ "//src/core:exec_ctx_wakeup_scheduler",
"//src/core:experiments",
"//src/core:gpr_atm",
"//src/core:gpr_manual_constructor",
"//src/core:grpc_backend_metric_data",
+ "//src/core:grpc_channel_idle_filter",
"//src/core:grpc_message_size_filter",
"//src/core:grpc_service_config",
+ "//src/core:idle_filter_state",
"//src/core:init_internally",
"//src/core:iomgr_fwd",
"//src/core:json",
@@ -3751,9 +3762,13 @@ grpc_cc_library(
"//src/core:latch",
"//src/core:lb_policy",
"//src/core:lb_policy_registry",
+ "//src/core:loop",
"//src/core:map",
"//src/core:memory_quota",
+ "//src/core:metadata",
"//src/core:metadata_batch",
+ "//src/core:metrics",
+ "//src/core:observable",
"//src/core:pipe",
"//src/core:poll",
"//src/core:pollset_set",
@@ -3766,10 +3781,13 @@ grpc_cc_library(
"//src/core:retry_throttle",
"//src/core:seq",
"//src/core:service_config_parser",
+ "//src/core:single_set_ptr",
+ "//src/core:sleep",
"//src/core:slice",
"//src/core:slice_buffer",
"//src/core:slice_refcount",
"//src/core:stats_data",
+ "//src/core:status_flag",
"//src/core:status_helper",
"//src/core:subchannel_connector",
"//src/core:subchannel_interface",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 23a19b19cdb..355823877fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1829,6 +1829,7 @@ add_library(grpc
src/core/channelz/channelz.cc
src/core/channelz/channelz_registry.cc
src/core/client_channel/backup_poller.cc
+ src/core/client_channel/client_channel.cc
src/core/client_channel/client_channel_factory.cc
src/core/client_channel/client_channel_filter.cc
src/core/client_channel/client_channel_plugin.cc
@@ -2925,6 +2926,7 @@ add_library(grpc_unsecure
src/core/channelz/channelz.cc
src/core/channelz/channelz_registry.cc
src/core/client_channel/backup_poller.cc
+ src/core/client_channel/client_channel.cc
src/core/client_channel/client_channel_factory.cc
src/core/client_channel/client_channel_filter.cc
src/core/client_channel/client_channel_plugin.cc
diff --git a/Makefile b/Makefile
index b8cbbb15fb6..144ce2d092e 100644
--- a/Makefile
+++ b/Makefile
@@ -670,6 +670,7 @@ LIBGRPC_SRC = \
src/core/channelz/channelz.cc \
src/core/channelz/channelz_registry.cc \
src/core/client_channel/backup_poller.cc \
+ src/core/client_channel/client_channel.cc \
src/core/client_channel/client_channel_factory.cc \
src/core/client_channel/client_channel_filter.cc \
src/core/client_channel/client_channel_plugin.cc \
diff --git a/Package.swift b/Package.swift
index 3452fbf6736..4c37f83205b 100644
--- a/Package.swift
+++ b/Package.swift
@@ -125,6 +125,8 @@ let package = Package(
"src/core/channelz/channelz_registry.h",
"src/core/client_channel/backup_poller.cc",
"src/core/client_channel/backup_poller.h",
+ "src/core/client_channel/client_channel.cc",
+ "src/core/client_channel/client_channel.h",
"src/core/client_channel/client_channel_factory.cc",
"src/core/client_channel/client_channel_factory.h",
"src/core/client_channel/client_channel_filter.cc",
@@ -1541,6 +1543,7 @@ let package = Package(
"src/core/lib/promise/latch.h",
"src/core/lib/promise/loop.h",
"src/core/lib/promise/map.h",
+ "src/core/lib/promise/observable.h",
"src/core/lib/promise/party.cc",
"src/core/lib/promise/party.h",
"src/core/lib/promise/pipe.h",
diff --git a/bazel/experiments.bzl b/bazel/experiments.bzl
index f45d505b2ce..0cd7f66dbce 100644
--- a/bazel/experiments.bzl
+++ b/bazel/experiments.bzl
@@ -18,7 +18,6 @@
EXPERIMENT_ENABLES = {
"call_status_override_on_cancellation": "call_status_override_on_cancellation",
- "call_v3": "call_v3",
"canary_client_privacy": "canary_client_privacy",
"client_privacy": "client_privacy",
"event_engine_client": "event_engine_client",
@@ -44,6 +43,8 @@ EXPERIMENT_ENABLES = {
"unconstrained_max_quota_buffer_size": "unconstrained_max_quota_buffer_size",
"work_serializer_clears_time_cache": "work_serializer_clears_time_cache",
"work_serializer_dispatch": "event_engine_client,work_serializer_dispatch",
+ "call_v3": "call_v3,event_engine_client,event_engine_listener,work_serializer_dispatch",
+ "wrr_delegate_to_pick_first": "wrr_delegate_to_pick_first",
}
EXPERIMENT_POLLERS = [
diff --git a/build_autogenerated.yaml b/build_autogenerated.yaml
index d5045c64ebc..8138997d4d0 100644
--- a/build_autogenerated.yaml
+++ b/build_autogenerated.yaml
@@ -226,6 +226,7 @@ libs:
- src/core/channelz/channelz.h
- src/core/channelz/channelz_registry.h
- src/core/client_channel/backup_poller.h
+ - src/core/client_channel/client_channel.h
- src/core/client_channel/client_channel_factory.h
- src/core/client_channel/client_channel_filter.h
- src/core/client_channel/client_channel_internal.h
@@ -1008,6 +1009,7 @@ libs:
- src/core/lib/promise/latch.h
- src/core/lib/promise/loop.h
- src/core/lib/promise/map.h
+ - src/core/lib/promise/observable.h
- src/core/lib/promise/party.h
- src/core/lib/promise/pipe.h
- src/core/lib/promise/poll.h
@@ -1250,6 +1252,7 @@ libs:
- src/core/channelz/channelz.cc
- src/core/channelz/channelz_registry.cc
- src/core/client_channel/backup_poller.cc
+ - src/core/client_channel/client_channel.cc
- src/core/client_channel/client_channel_factory.cc
- src/core/client_channel/client_channel_filter.cc
- src/core/client_channel/client_channel_plugin.cc
@@ -2213,6 +2216,7 @@ libs:
- src/core/channelz/channelz.h
- src/core/channelz/channelz_registry.h
- src/core/client_channel/backup_poller.h
+ - src/core/client_channel/client_channel.h
- src/core/client_channel/client_channel_factory.h
- src/core/client_channel/client_channel_filter.h
- src/core/client_channel/client_channel_internal.h
@@ -2540,6 +2544,7 @@ libs:
- src/core/lib/promise/latch.h
- src/core/lib/promise/loop.h
- src/core/lib/promise/map.h
+ - src/core/lib/promise/observable.h
- src/core/lib/promise/party.h
- src/core/lib/promise/pipe.h
- src/core/lib/promise/poll.h
@@ -2706,6 +2711,7 @@ libs:
- src/core/channelz/channelz.cc
- src/core/channelz/channelz_registry.cc
- src/core/client_channel/backup_poller.cc
+ - src/core/client_channel/client_channel.cc
- src/core/client_channel/client_channel_factory.cc
- src/core/client_channel/client_channel_filter.cc
- src/core/client_channel/client_channel_plugin.cc
diff --git a/config.m4 b/config.m4
index 4b72ff9577e..b0049612b2d 100644
--- a/config.m4
+++ b/config.m4
@@ -45,6 +45,7 @@ if test "$PHP_GRPC" != "no"; then
src/core/channelz/channelz.cc \
src/core/channelz/channelz_registry.cc \
src/core/client_channel/backup_poller.cc \
+ src/core/client_channel/client_channel.cc \
src/core/client_channel/client_channel_factory.cc \
src/core/client_channel/client_channel_filter.cc \
src/core/client_channel/client_channel_plugin.cc \
diff --git a/config.w32 b/config.w32
index f71331b6d7d..bc584e5434e 100644
--- a/config.w32
+++ b/config.w32
@@ -10,6 +10,7 @@ if (PHP_GRPC != "no") {
"src\\core\\channelz\\channelz.cc " +
"src\\core\\channelz\\channelz_registry.cc " +
"src\\core\\client_channel\\backup_poller.cc " +
+ "src\\core\\client_channel\\client_channel.cc " +
"src\\core\\client_channel\\client_channel_factory.cc " +
"src\\core\\client_channel\\client_channel_filter.cc " +
"src\\core\\client_channel\\client_channel_plugin.cc " +
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index cb31ce8929d..cdfe26d4865 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -267,6 +267,7 @@ Pod::Spec.new do |s|
'src/core/channelz/channelz.h',
'src/core/channelz/channelz_registry.h',
'src/core/client_channel/backup_poller.h',
+ 'src/core/client_channel/client_channel.h',
'src/core/client_channel/client_channel_factory.h',
'src/core/client_channel/client_channel_filter.h',
'src/core/client_channel/client_channel_internal.h',
@@ -1111,6 +1112,7 @@ Pod::Spec.new do |s|
'src/core/lib/promise/latch.h',
'src/core/lib/promise/loop.h',
'src/core/lib/promise/map.h',
+ 'src/core/lib/promise/observable.h',
'src/core/lib/promise/party.h',
'src/core/lib/promise/pipe.h',
'src/core/lib/promise/poll.h',
@@ -1556,6 +1558,7 @@ Pod::Spec.new do |s|
'src/core/channelz/channelz.h',
'src/core/channelz/channelz_registry.h',
'src/core/client_channel/backup_poller.h',
+ 'src/core/client_channel/client_channel.h',
'src/core/client_channel/client_channel_factory.h',
'src/core/client_channel/client_channel_filter.h',
'src/core/client_channel/client_channel_internal.h',
@@ -2382,6 +2385,7 @@ Pod::Spec.new do |s|
'src/core/lib/promise/latch.h',
'src/core/lib/promise/loop.h',
'src/core/lib/promise/map.h',
+ 'src/core/lib/promise/observable.h',
'src/core/lib/promise/party.h',
'src/core/lib/promise/pipe.h',
'src/core/lib/promise/poll.h',
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index e70fc2d7894..2a2cc1d465c 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -244,6 +244,8 @@ Pod::Spec.new do |s|
'src/core/channelz/channelz_registry.h',
'src/core/client_channel/backup_poller.cc',
'src/core/client_channel/backup_poller.h',
+ 'src/core/client_channel/client_channel.cc',
+ 'src/core/client_channel/client_channel.h',
'src/core/client_channel/client_channel_factory.cc',
'src/core/client_channel/client_channel_factory.h',
'src/core/client_channel/client_channel_filter.cc',
@@ -1660,6 +1662,7 @@ Pod::Spec.new do |s|
'src/core/lib/promise/latch.h',
'src/core/lib/promise/loop.h',
'src/core/lib/promise/map.h',
+ 'src/core/lib/promise/observable.h',
'src/core/lib/promise/party.cc',
'src/core/lib/promise/party.h',
'src/core/lib/promise/pipe.h',
@@ -2356,6 +2359,7 @@ Pod::Spec.new do |s|
'src/core/channelz/channelz.h',
'src/core/channelz/channelz_registry.h',
'src/core/client_channel/backup_poller.h',
+ 'src/core/client_channel/client_channel.h',
'src/core/client_channel/client_channel_factory.h',
'src/core/client_channel/client_channel_filter.h',
'src/core/client_channel/client_channel_internal.h',
@@ -3162,6 +3166,7 @@ Pod::Spec.new do |s|
'src/core/lib/promise/latch.h',
'src/core/lib/promise/loop.h',
'src/core/lib/promise/map.h',
+ 'src/core/lib/promise/observable.h',
'src/core/lib/promise/party.h',
'src/core/lib/promise/pipe.h',
'src/core/lib/promise/poll.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 4ea7d9088d6..8c717042702 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -131,6 +131,8 @@ Gem::Specification.new do |s|
s.files += %w( src/core/channelz/channelz_registry.h )
s.files += %w( src/core/client_channel/backup_poller.cc )
s.files += %w( src/core/client_channel/backup_poller.h )
+ s.files += %w( src/core/client_channel/client_channel.cc )
+ s.files += %w( src/core/client_channel/client_channel.h )
s.files += %w( src/core/client_channel/client_channel_factory.cc )
s.files += %w( src/core/client_channel/client_channel_factory.h )
s.files += %w( src/core/client_channel/client_channel_filter.cc )
@@ -1547,6 +1549,7 @@ Gem::Specification.new do |s|
s.files += %w( src/core/lib/promise/latch.h )
s.files += %w( src/core/lib/promise/loop.h )
s.files += %w( src/core/lib/promise/map.h )
+ s.files += %w( src/core/lib/promise/observable.h )
s.files += %w( src/core/lib/promise/party.cc )
s.files += %w( src/core/lib/promise/party.h )
s.files += %w( src/core/lib/promise/pipe.h )
diff --git a/grpc.gyp b/grpc.gyp
new file mode 100644
index 00000000000..2327e4ad03a
--- /dev/null
+++ b/grpc.gyp
@@ -0,0 +1,2669 @@
+# GRPC GYP build file
+
+# This file has been automatically generated from a template file.
+# Please look at the templates directory instead.
+# This file can be regenerated from the template by running
+# tools/buildgen/generate_projects.sh
+
+# Copyright 2015 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+{
+ 'variables': {
+ # The openssl and zlib dependencies must be passed in as variables
+ # defined in an included gypi file, usually common.gypi.
+ 'openssl_gyp_target%': 'Please Define openssl_gyp_target variable',
+ 'zlib_gyp_target%': 'Please Define zlib_gyp_target variable',
+
+ 'grpc_gcov%': 'false',
+ 'grpc_alpine%': 'false',
+ },
+ 'target_defaults': {
+ 'configurations': {
+ 'Debug': {
+ 'cflags': [
+ '-O0',
+ ],
+ 'defines': [
+ '_DEBUG',
+ 'DEBUG',
+ ],
+ },
+ 'Release': {
+ 'cflags': [
+ '-O2',
+ '-Wframe-larger-than=16384',
+ ],
+ 'defines': [
+ 'NDEBUG',
+ ],
+ },
+ },
+ 'cflags': [
+ '-g',
+ '-Wall',
+ '-Wextra',
+ '-DOSATOMIC_USE_INLINED=1',
+ '-Ithird_party/abseil-cpp',
+ '-Ithird_party/re2',
+ '-Ithird_party/upb',
+ '-Isrc/core/ext/upb-gen',
+ '-Isrc/core/ext/upbdefs-gen',
+ '-Ithird_party/utf8_range',
+ '-Ithird_party/xxhash',
+ ],
+ 'ldflags': [
+ '-g',
+ ],
+ 'cflags_c': [
+ '-Werror',
+ '-std=c11',
+ ],
+ 'cflags_cc': [
+ '-Werror',
+ '-std=c++14',
+ ],
+ 'include_dirs': [
+ '.',
+ '../..',
+ 'include',
+ ],
+ 'defines': [
+ 'GRPC_ARES=0',
+ ],
+ 'dependencies': [
+ '<(openssl_gyp_target)',
+ '<(zlib_gyp_target)',
+ ],
+ 'conditions': [
+ ['grpc_gcov=="true"', {
+ 'cflags': [
+ '-O0',
+ '-fprofile-arcs',
+ '-ftest-coverage',
+ '-Wno-return-type',
+ ],
+ 'defines': [
+ '_DEBUG',
+ 'DEBUG',
+ 'GPR_GCOV',
+ ],
+ 'ldflags': [
+ '-fprofile-arcs',
+ '-ftest-coverage',
+ '-rdynamic',
+ '-lstdc++',
+ ],
+ }],
+ ['grpc_alpine=="true"', {
+ 'defines': [
+ 'GPR_MUSL_LIBC_COMPAT'
+ ]
+ }],
+ ['OS == "win"', {
+ 'defines': [
+ '_WIN32_WINNT=0x0600',
+ 'WIN32_LEAN_AND_MEAN',
+ '_HAS_EXCEPTIONS=0',
+ 'UNICODE',
+ '_UNICODE',
+ 'NOMINMAX',
+ ],
+ 'msvs_settings': {
+ 'VCCLCompilerTool': {
+ 'RuntimeLibrary': 1, # static debug
+ }
+ },
+ "libraries": [
+ "ws2_32"
+ ]
+ }],
+ ['OS == "mac"', {
+ 'xcode_settings': {
+ 'OTHER_CFLAGS': [
+ '-g',
+ '-Wall',
+ '-Wextra',
+ '-DOSATOMIC_USE_INLINED=1',
+ '-Ithird_party/abseil-cpp',
+ '-Ithird_party/re2',
+ '-Ithird_party/upb',
+ '-Isrc/core/ext/upb-gen',
+ '-Isrc/core/ext/upbdefs-gen',
+ '-Ithird_party/utf8_range',
+ '-Ithird_party/xxhash',
+ ],
+ 'OTHER_CPLUSPLUSFLAGS': [
+ '-g',
+ '-Wall',
+ '-Wextra',
+ '-DOSATOMIC_USE_INLINED=1',
+ '-Ithird_party/abseil-cpp',
+ '-Ithird_party/re2',
+ '-Ithird_party/upb',
+ '-Isrc/core/ext/upb-gen',
+ '-Isrc/core/ext/upbdefs-gen',
+ '-Ithird_party/utf8_range',
+ '-Ithird_party/xxhash',
+ '-stdlib=libc++',
+ '-std=c++14',
+ '-Wno-error=deprecated-declarations',
+ ],
+ },
+ }]
+ ]
+ },
+ 'targets': [
+ {
+ 'target_name': 'address_sorting',
+ 'type': 'static_library',
+ 'dependencies': [
+ ],
+ 'sources': [
+ 'third_party/address_sorting/address_sorting.c',
+ 'third_party/address_sorting/address_sorting_posix.c',
+ 'third_party/address_sorting/address_sorting_windows.c',
+ ],
+ },
+ {
+ 'target_name': 'gpr',
+ 'type': 'static_library',
+ 'dependencies': [
+ 'absl/base:base',
+ 'absl/base:core_headers',
+ 'absl/flags:flag',
+ 'absl/flags:marshalling',
+ 'absl/functional:any_invocable',
+ 'absl/memory:memory',
+ 'absl/random:random',
+ 'absl/status:status',
+ 'absl/strings:cord',
+ 'absl/strings:str_format',
+ 'absl/strings:strings',
+ 'absl/synchronization:synchronization',
+ 'absl/time:time',
+ 'absl/types:optional',
+ 'absl/types:variant',
+ ],
+ 'sources': [
+ 'src/core/lib/config/config_vars.cc',
+ 'src/core/lib/config/config_vars_non_generated.cc',
+ 'src/core/lib/config/load_config.cc',
+ 'src/core/lib/event_engine/thread_local.cc',
+ 'src/core/lib/gpr/alloc.cc',
+ 'src/core/lib/gpr/android/log.cc',
+ 'src/core/lib/gpr/atm.cc',
+ 'src/core/lib/gpr/iphone/cpu.cc',
+ 'src/core/lib/gpr/linux/cpu.cc',
+ 'src/core/lib/gpr/linux/log.cc',
+ 'src/core/lib/gpr/log.cc',
+ 'src/core/lib/gpr/msys/tmpfile.cc',
+ 'src/core/lib/gpr/posix/cpu.cc',
+ 'src/core/lib/gpr/posix/log.cc',
+ 'src/core/lib/gpr/posix/string.cc',
+ 'src/core/lib/gpr/posix/sync.cc',
+ 'src/core/lib/gpr/posix/time.cc',
+ 'src/core/lib/gpr/posix/tmpfile.cc',
+ 'src/core/lib/gpr/string.cc',
+ 'src/core/lib/gpr/sync.cc',
+ 'src/core/lib/gpr/sync_abseil.cc',
+ 'src/core/lib/gpr/time.cc',
+ 'src/core/lib/gpr/time_precise.cc',
+ 'src/core/lib/gpr/windows/cpu.cc',
+ 'src/core/lib/gpr/windows/log.cc',
+ 'src/core/lib/gpr/windows/string.cc',
+ 'src/core/lib/gpr/windows/string_util.cc',
+ 'src/core/lib/gpr/windows/sync.cc',
+ 'src/core/lib/gpr/windows/time.cc',
+ 'src/core/lib/gpr/windows/tmpfile.cc',
+ 'src/core/lib/gprpp/crash.cc',
+ 'src/core/lib/gprpp/examine_stack.cc',
+ 'src/core/lib/gprpp/fork.cc',
+ 'src/core/lib/gprpp/host_port.cc',
+ 'src/core/lib/gprpp/linux/env.cc',
+ 'src/core/lib/gprpp/mpscq.cc',
+ 'src/core/lib/gprpp/posix/env.cc',
+ 'src/core/lib/gprpp/posix/stat.cc',
+ 'src/core/lib/gprpp/posix/thd.cc',
+ 'src/core/lib/gprpp/strerror.cc',
+ 'src/core/lib/gprpp/tchar.cc',
+ 'src/core/lib/gprpp/time_util.cc',
+ 'src/core/lib/gprpp/windows/env.cc',
+ 'src/core/lib/gprpp/windows/stat.cc',
+ 'src/core/lib/gprpp/windows/thd.cc',
+ ],
+ },
+ {
+ 'target_name': 'grpc',
+ 'type': 'static_library',
+ 'dependencies': [
+ 'upb_json_lib',
+ 'upb_textformat_lib',
+ 're2',
+ 'z',
+ 'absl/algorithm:container',
+ 'absl/base:config',
+ 'absl/base:no_destructor',
+ 'absl/cleanup:cleanup',
+ 'absl/container:flat_hash_map',
+ 'absl/container:flat_hash_set',
+ 'absl/container:inlined_vector',
+ 'absl/functional:bind_front',
+ 'absl/functional:function_ref',
+ 'absl/hash:hash',
+ 'absl/meta:type_traits',
+ 'absl/random:bit_gen_ref',
+ 'absl/random:distributions',
+ 'absl/status:statusor',
+ 'absl/types:span',
+ 'absl/utility:utility',
+ 'cares',
+ 'gpr',
+ 'address_sorting',
+ ],
+ 'sources': [
+ 'src/core/client_channel/backup_poller.cc',
+ 'src/core/client_channel/client_channel.cc',
+ 'src/core/client_channel/client_channel_channelz.cc',
+ 'src/core/client_channel/client_channel_factory.cc',
+ 'src/core/client_channel/client_channel_filter.cc',
+ 'src/core/client_channel/client_channel_plugin.cc',
+ 'src/core/client_channel/client_channel_service_config.cc',
+ 'src/core/client_channel/config_selector.cc',
+ 'src/core/client_channel/dynamic_filters.cc',
+ 'src/core/client_channel/global_subchannel_pool.cc',
+ 'src/core/client_channel/http_proxy_mapper.cc',
+ 'src/core/client_channel/local_subchannel_pool.cc',
+ 'src/core/client_channel/retry_filter.cc',
+ 'src/core/client_channel/retry_filter_legacy_call_data.cc',
+ 'src/core/client_channel/retry_service_config.cc',
+ 'src/core/client_channel/retry_throttle.cc',
+ 'src/core/client_channel/subchannel.cc',
+ 'src/core/client_channel/subchannel_pool_interface.cc',
+ 'src/core/client_channel/subchannel_stream_client.cc',
+ 'src/core/ext/filters/backend_metrics/backend_metric_filter.cc',
+ 'src/core/ext/filters/census/grpc_context.cc',
+ 'src/core/ext/filters/channel_idle/channel_idle_filter.cc',
+ 'src/core/ext/filters/channel_idle/idle_filter_state.cc',
+ 'src/core/ext/filters/channel_idle/legacy_channel_idle_filter.cc',
+ 'src/core/ext/filters/deadline/deadline_filter.cc',
+ 'src/core/ext/filters/fault_injection/fault_injection_filter.cc',
+ 'src/core/ext/filters/fault_injection/fault_injection_service_config_parser.cc',
+ 'src/core/ext/filters/http/client/http_client_filter.cc',
+ 'src/core/ext/filters/http/client_authority_filter.cc',
+ 'src/core/ext/filters/http/http_filters_plugin.cc',
+ 'src/core/ext/filters/http/message_compress/compression_filter.cc',
+ 'src/core/ext/filters/http/message_compress/legacy_compression_filter.cc',
+ 'src/core/ext/filters/http/server/http_server_filter.cc',
+ 'src/core/ext/filters/message_size/message_size_filter.cc',
+ 'src/core/ext/filters/rbac/rbac_filter.cc',
+ 'src/core/ext/filters/rbac/rbac_service_config_parser.cc',
+ 'src/core/ext/filters/server_config_selector/server_config_selector_filter.cc',
+ 'src/core/ext/filters/stateful_session/stateful_session_filter.cc',
+ 'src/core/ext/filters/stateful_session/stateful_session_service_config_parser.cc',
+ 'src/core/ext/gcp/metadata_query.cc',
+ 'src/core/ext/transport/chttp2/alpn/alpn.cc',
+ 'src/core/ext/transport/chttp2/client/chttp2_connector.cc',
+ 'src/core/ext/transport/chttp2/server/chttp2_server.cc',
+ 'src/core/ext/transport/chttp2/transport/bin_decoder.cc',
+ 'src/core/ext/transport/chttp2/transport/bin_encoder.cc',
+ 'src/core/ext/transport/chttp2/transport/chttp2_transport.cc',
+ 'src/core/ext/transport/chttp2/transport/decode_huff.cc',
+ 'src/core/ext/transport/chttp2/transport/flow_control.cc',
+ 'src/core/ext/transport/chttp2/transport/frame.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_data.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_goaway.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_ping.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_rst_stream.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_settings.cc',
+ 'src/core/ext/transport/chttp2/transport/frame_window_update.cc',
+ 'src/core/ext/transport/chttp2/transport/hpack_encoder.cc',
+ 'src/core/ext/transport/chttp2/transport/hpack_encoder_table.cc',
+ 'src/core/ext/transport/chttp2/transport/hpack_parse_result.cc',
+ 'src/core/ext/transport/chttp2/transport/hpack_parser.cc',
+ 'src/core/ext/transport/chttp2/transport/hpack_parser_table.cc',
+ 'src/core/ext/transport/chttp2/transport/http2_settings.cc',
+ 'src/core/ext/transport/chttp2/transport/http_trace.cc',
+ 'src/core/ext/transport/chttp2/transport/huffsyms.cc',
+ 'src/core/ext/transport/chttp2/transport/max_concurrent_streams_policy.cc',
+ 'src/core/ext/transport/chttp2/transport/parsing.cc',
+ 'src/core/ext/transport/chttp2/transport/ping_abuse_policy.cc',
+ 'src/core/ext/transport/chttp2/transport/ping_callbacks.cc',
+ 'src/core/ext/transport/chttp2/transport/ping_rate_policy.cc',
+ 'src/core/ext/transport/chttp2/transport/stream_lists.cc',
+ 'src/core/ext/transport/chttp2/transport/varint.cc',
+ 'src/core/ext/transport/chttp2/transport/write_size_policy.cc',
+ 'src/core/ext/transport/chttp2/transport/writing.cc',
+ 'src/core/ext/transport/inproc/inproc_plugin.cc',
+ 'src/core/ext/transport/inproc/inproc_transport.cc',
+ 'src/core/ext/transport/inproc/legacy_inproc_transport.cc',
+ 'src/core/ext/upb-gen/envoy/admin/v3/certs.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/clusters.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/config_dump.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/config_dump_shared.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/init_dump.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/listeners.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/memory.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/metrics.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/mutex_stats.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/server_info.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/admin/v3/tap.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/annotations/deprecation.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/annotations/resource.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/accesslog/v3/accesslog.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/bootstrap/v3/bootstrap.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/cluster/v3/circuit_breaker.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/cluster/v3/cluster.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/cluster/v3/filter.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/cluster/v3/outlier_detection.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/common/matcher/v3/matcher.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/address.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/backoff.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/base.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/config_source.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/event_service_config.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/extension.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/grpc_method_list.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/grpc_service.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/health_check.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/http_service.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/http_uri.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/protocol.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/proxy_protocol.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/resolver.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/socket_option.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/substitution_format_string.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/core/v3/udp_socket_config.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/endpoint/v3/endpoint.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/endpoint/v3/endpoint_components.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/endpoint/v3/load_report.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/listener/v3/api_listener.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/listener/v3/listener.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/listener/v3/listener_components.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/listener/v3/quic_config.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/listener/v3/udp_listener_config.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/metrics/v3/metrics_service.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/metrics/v3/stats.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/overload/v3/overload.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/rbac/v3/rbac.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/route/v3/route.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/route/v3/route_components.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/route/v3/scoped_route.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/tap/v3/common.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/datadog.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/dynamic_ot.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/http_tracer.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/lightstep.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/opencensus.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/opentelemetry.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/service.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/skywalking.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/trace.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/xray.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/config/trace/v3/zipkin.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/data/accesslog/v3/accesslog.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/extensions/clusters/aggregate/v3/cluster.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/extensions/filters/common/fault/v3/fault.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/extensions/filters/http/fault/v3/fault.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/extensions/filters/http/rbac/v3/rbac.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/extensions/filters/http/router/v3/router.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/extensions/http/stateful_session/cookie/v3/cookie.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/extensions/transport_sockets/tls/v3/cert.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/http/v3/cookie.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/matcher/v3/metadata.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/type/matcher/v3/node.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/type/matcher/v3/number.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/type/matcher/v3/path.upb_minitable.c',
+ 'src/core/ext/upb-gen/envoy/type/matcher/v3/regex.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/tracing/v3/custom_tag.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/v3/http_status.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/v3/range.upb_minitable.c',
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+ 'src/core/ext/upb-gen/envoy/type/v3/token_bucket.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/api/annotations.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/api/expr/v1alpha1/checked.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/api/expr/v1alpha1/syntax.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/api/http.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/api/httpbody.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/protobuf/any.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/protobuf/descriptor.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/protobuf/duration.upb_minitable.c',
+ 'src/core/ext/upb-gen/google/protobuf/empty.upb_minitable.c',
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+ 'src/core/ext/upb-gen/google/rpc/status.upb_minitable.c',
+ 'src/core/ext/upb-gen/opencensus/proto/trace/v1/trace_config.upb_minitable.c',
+ 'src/core/ext/upb-gen/src/proto/grpc/gcp/altscontext.upb_minitable.c',
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+ 'src/core/ext/upb-gen/xds/type/matcher/v3/http_inputs.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/matcher/v3/ip.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/matcher/v3/matcher.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/matcher/v3/range.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/matcher/v3/regex.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/matcher/v3/string.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/v3/cel.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/v3/range.upb_minitable.c',
+ 'src/core/ext/upb-gen/xds/type/v3/typed_struct.upb_minitable.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/certs.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/clusters.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/config_dump.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/config_dump_shared.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/init_dump.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/listeners.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/memory.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/metrics.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/mutex_stats.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/server_info.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/admin/v3/tap.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/annotations/deprecation.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/annotations/resource.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/accesslog/v3/accesslog.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/bootstrap/v3/bootstrap.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/cluster/v3/circuit_breaker.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/cluster/v3/cluster.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/cluster/v3/filter.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/cluster/v3/outlier_detection.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/common/matcher/v3/matcher.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/address.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/backoff.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/base.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/config_source.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/event_service_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/extension.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/grpc_method_list.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/grpc_service.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/health_check.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/http_service.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/http_uri.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/protocol.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/proxy_protocol.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/resolver.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/socket_option.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/substitution_format_string.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/core/v3/udp_socket_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/endpoint/v3/endpoint.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/endpoint/v3/endpoint_components.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/endpoint/v3/load_report.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/listener/v3/api_listener.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/listener/v3/listener.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/listener/v3/listener_components.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/listener/v3/quic_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/listener/v3/udp_listener_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/metrics/v3/metrics_service.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/metrics/v3/stats.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/overload/v3/overload.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/rbac/v3/rbac.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/route/v3/route.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/route/v3/route_components.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/route/v3/scoped_route.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/tap/v3/common.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/datadog.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/dynamic_ot.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/http_tracer.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/lightstep.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/opencensus.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/opentelemetry.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/service.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/skywalking.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/trace.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/xray.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/config/trace/v3/zipkin.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/data/accesslog/v3/accesslog.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/clusters/aggregate/v3/cluster.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/common/fault/v3/fault.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/http/fault/v3/fault.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/http/rbac/v3/rbac.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/http/router/v3/router.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/http/stateful_session/v3/stateful_session.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/http/stateful_session/cookie/v3/cookie.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/transport_sockets/tls/v3/cert.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/transport_sockets/tls/v3/common.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/transport_sockets/tls/v3/secret.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/transport_sockets/tls/v3/tls.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/transport_sockets/tls/v3/tls_spiffe_validator_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/extensions/upstreams/http/v3/http_protocol_options.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/service/discovery/v3/ads.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/service/discovery/v3/discovery.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/service/load_stats/v3/lrs.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/service/status/v3/csds.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/http/v3/cookie.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/http/v3/path_transformation.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/filter_state.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/http_inputs.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/metadata.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/node.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/number.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/path.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/regex.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/status_code_input.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/string.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/struct.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/matcher/v3/value.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/metadata/v3/metadata.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/tracing/v3/custom_tag.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/hash_policy.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/http.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/http_status.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/percent.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/range.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/ratelimit_strategy.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/ratelimit_unit.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/semantic_version.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/envoy/type/v3/token_bucket.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/api/annotations.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/api/expr/v1alpha1/checked.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/api/expr/v1alpha1/syntax.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/api/http.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/api/httpbody.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/any.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/descriptor.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/duration.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/empty.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/struct.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/timestamp.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/protobuf/wrappers.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/google/rpc/status.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/opencensus/proto/trace/v1/trace_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/src/proto/grpc/lookup/v1/rls_config.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/udpa/annotations/migrate.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/udpa/annotations/security.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/udpa/annotations/sensitive.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/udpa/annotations/status.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/udpa/annotations/versioning.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/validate/validate.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/annotations/v3/migrate.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/annotations/v3/security.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/annotations/v3/sensitive.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/annotations/v3/status.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/annotations/v3/versioning.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/authority.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/cidr.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/collection_entry.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/context_params.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/extension.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/resource.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/resource_locator.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/core/v3/resource_name.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/cel.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/domain.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/http_inputs.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/ip.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/matcher.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/range.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/regex.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/matcher/v3/string.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/v3/cel.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/v3/range.upbdefs.c',
+ 'src/core/ext/upbdefs-gen/xds/type/v3/typed_struct.upbdefs.c',
+ 'src/core/ext/xds/certificate_provider_store.cc',
+ 'src/core/ext/xds/file_watcher_certificate_provider_factory.cc',
+ 'src/core/ext/xds/xds_api.cc',
+ 'src/core/ext/xds/xds_audit_logger_registry.cc',
+ 'src/core/ext/xds/xds_bootstrap.cc',
+ 'src/core/ext/xds/xds_bootstrap_grpc.cc',
+ 'src/core/ext/xds/xds_certificate_provider.cc',
+ 'src/core/ext/xds/xds_channel_stack_modifier.cc',
+ 'src/core/ext/xds/xds_client.cc',
+ 'src/core/ext/xds/xds_client_grpc.cc',
+ 'src/core/ext/xds/xds_client_stats.cc',
+ 'src/core/ext/xds/xds_cluster.cc',
+ 'src/core/ext/xds/xds_cluster_specifier_plugin.cc',
+ 'src/core/ext/xds/xds_common_types.cc',
+ 'src/core/ext/xds/xds_endpoint.cc',
+ 'src/core/ext/xds/xds_health_status.cc',
+ 'src/core/ext/xds/xds_http_fault_filter.cc',
+ 'src/core/ext/xds/xds_http_filters.cc',
+ 'src/core/ext/xds/xds_http_rbac_filter.cc',
+ 'src/core/ext/xds/xds_http_stateful_session_filter.cc',
+ 'src/core/ext/xds/xds_lb_policy_registry.cc',
+ 'src/core/ext/xds/xds_listener.cc',
+ 'src/core/ext/xds/xds_route_config.cc',
+ 'src/core/ext/xds/xds_routing.cc',
+ 'src/core/ext/xds/xds_server_config_fetcher.cc',
+ 'src/core/ext/xds/xds_transport_grpc.cc',
+ 'src/core/lib/address_utils/parse_address.cc',
+ 'src/core/lib/address_utils/sockaddr_utils.cc',
+ 'src/core/lib/backoff/backoff.cc',
+ 'src/core/lib/backoff/random_early_detection.cc',
+ 'src/core/lib/channel/call_tracer.cc',
+ 'src/core/lib/channel/channel_args.cc',
+ 'src/core/lib/channel/channel_args_preconditioning.cc',
+ 'src/core/lib/channel/channel_stack.cc',
+ 'src/core/lib/channel/channel_stack_builder.cc',
+ 'src/core/lib/channel/channel_stack_builder_impl.cc',
+ 'src/core/lib/channel/channel_stack_trace.cc',
+ 'src/core/lib/channel/channel_trace.cc',
+ 'src/core/lib/channel/channelz.cc',
+ 'src/core/lib/channel/channelz_registry.cc',
+ 'src/core/lib/channel/connected_channel.cc',
+ 'src/core/lib/channel/metrics.cc',
+ 'src/core/lib/channel/promise_based_filter.cc',
+ 'src/core/lib/channel/server_call_tracer_filter.cc',
+ 'src/core/lib/channel/status_util.cc',
+ 'src/core/lib/compression/compression.cc',
+ 'src/core/lib/compression/compression_internal.cc',
+ 'src/core/lib/compression/message_compress.cc',
+ 'src/core/lib/config/core_configuration.cc',
+ 'src/core/lib/debug/event_log.cc',
+ 'src/core/lib/debug/histogram_view.cc',
+ 'src/core/lib/debug/stats.cc',
+ 'src/core/lib/debug/stats_data.cc',
+ 'src/core/lib/debug/trace.cc',
+ 'src/core/lib/event_engine/ares_resolver.cc',
+ 'src/core/lib/event_engine/cf_engine/cf_engine.cc',
+ 'src/core/lib/event_engine/cf_engine/cfstream_endpoint.cc',
+ 'src/core/lib/event_engine/cf_engine/dns_service_resolver.cc',
+ 'src/core/lib/event_engine/channel_args_endpoint_config.cc',
+ 'src/core/lib/event_engine/default_event_engine.cc',
+ 'src/core/lib/event_engine/default_event_engine_factory.cc',
+ 'src/core/lib/event_engine/event_engine.cc',
+ 'src/core/lib/event_engine/forkable.cc',
+ 'src/core/lib/event_engine/posix_engine/ev_epoll1_linux.cc',
+ 'src/core/lib/event_engine/posix_engine/ev_poll_posix.cc',
+ 'src/core/lib/event_engine/posix_engine/event_poller_posix_default.cc',
+ 'src/core/lib/event_engine/posix_engine/internal_errqueue.cc',
+ 'src/core/lib/event_engine/posix_engine/lockfree_event.cc',
+ 'src/core/lib/event_engine/posix_engine/native_posix_dns_resolver.cc',
+ 'src/core/lib/event_engine/posix_engine/posix_endpoint.cc',
+ 'src/core/lib/event_engine/posix_engine/posix_engine.cc',
+ 'src/core/lib/event_engine/posix_engine/posix_engine_listener.cc',
+ 'src/core/lib/event_engine/posix_engine/posix_engine_listener_utils.cc',
+ 'src/core/lib/event_engine/posix_engine/tcp_socket_utils.cc',
+ 'src/core/lib/event_engine/posix_engine/timer.cc',
+ 'src/core/lib/event_engine/posix_engine/timer_heap.cc',
+ 'src/core/lib/event_engine/posix_engine/timer_manager.cc',
+ 'src/core/lib/event_engine/posix_engine/traced_buffer_list.cc',
+ 'src/core/lib/event_engine/posix_engine/wakeup_fd_eventfd.cc',
+ 'src/core/lib/event_engine/posix_engine/wakeup_fd_pipe.cc',
+ 'src/core/lib/event_engine/posix_engine/wakeup_fd_posix_default.cc',
+ 'src/core/lib/event_engine/resolved_address.cc',
+ 'src/core/lib/event_engine/shim.cc',
+ 'src/core/lib/event_engine/slice.cc',
+ 'src/core/lib/event_engine/slice_buffer.cc',
+ 'src/core/lib/event_engine/tcp_socket_utils.cc',
+ 'src/core/lib/event_engine/thread_pool/thread_count.cc',
+ 'src/core/lib/event_engine/thread_pool/thread_pool_factory.cc',
+ 'src/core/lib/event_engine/thread_pool/work_stealing_thread_pool.cc',
+ 'src/core/lib/event_engine/thready_event_engine/thready_event_engine.cc',
+ 'src/core/lib/event_engine/time_util.cc',
+ 'src/core/lib/event_engine/trace.cc',
+ 'src/core/lib/event_engine/utils.cc',
+ 'src/core/lib/event_engine/windows/grpc_polled_fd_windows.cc',
+ 'src/core/lib/event_engine/windows/iocp.cc',
+ 'src/core/lib/event_engine/windows/native_windows_dns_resolver.cc',
+ 'src/core/lib/event_engine/windows/win_socket.cc',
+ 'src/core/lib/event_engine/windows/windows_endpoint.cc',
+ 'src/core/lib/event_engine/windows/windows_engine.cc',
+ 'src/core/lib/event_engine/windows/windows_listener.cc',
+ 'src/core/lib/event_engine/work_queue/basic_work_queue.cc',
+ 'src/core/lib/experiments/config.cc',
+ 'src/core/lib/experiments/experiments.cc',
+ 'src/core/lib/gprpp/load_file.cc',
+ 'src/core/lib/gprpp/per_cpu.cc',
+ 'src/core/lib/gprpp/posix/directory_reader.cc',
+ 'src/core/lib/gprpp/ref_counted_string.cc',
+ 'src/core/lib/gprpp/status_helper.cc',
+ 'src/core/lib/gprpp/time.cc',
+ 'src/core/lib/gprpp/time_averaged_stats.cc',
+ 'src/core/lib/gprpp/validation_errors.cc',
+ 'src/core/lib/gprpp/windows/directory_reader.cc',
+ 'src/core/lib/gprpp/work_serializer.cc',
+ 'src/core/lib/handshaker/proxy_mapper_registry.cc',
+ 'src/core/lib/http/format_request.cc',
+ 'src/core/lib/http/httpcli.cc',
+ 'src/core/lib/http/httpcli_security_connector.cc',
+ 'src/core/lib/http/parser.cc',
+ 'src/core/lib/iomgr/buffer_list.cc',
+ 'src/core/lib/iomgr/call_combiner.cc',
+ 'src/core/lib/iomgr/cfstream_handle.cc',
+ 'src/core/lib/iomgr/closure.cc',
+ 'src/core/lib/iomgr/combiner.cc',
+ 'src/core/lib/iomgr/dualstack_socket_posix.cc',
+ 'src/core/lib/iomgr/endpoint.cc',
+ 'src/core/lib/iomgr/endpoint_cfstream.cc',
+ 'src/core/lib/iomgr/endpoint_pair_posix.cc',
+ 'src/core/lib/iomgr/endpoint_pair_windows.cc',
+ 'src/core/lib/iomgr/error.cc',
+ 'src/core/lib/iomgr/error_cfstream.cc',
+ 'src/core/lib/iomgr/ev_apple.cc',
+ 'src/core/lib/iomgr/ev_epoll1_linux.cc',
+ 'src/core/lib/iomgr/ev_poll_posix.cc',
+ 'src/core/lib/iomgr/ev_posix.cc',
+ 'src/core/lib/iomgr/ev_windows.cc',
+ 'src/core/lib/iomgr/event_engine_shims/closure.cc',
+ 'src/core/lib/iomgr/event_engine_shims/endpoint.cc',
+ 'src/core/lib/iomgr/event_engine_shims/tcp_client.cc',
+ 'src/core/lib/iomgr/exec_ctx.cc',
+ 'src/core/lib/iomgr/executor.cc',
+ 'src/core/lib/iomgr/fork_posix.cc',
+ 'src/core/lib/iomgr/fork_windows.cc',
+ 'src/core/lib/iomgr/gethostname_fallback.cc',
+ 'src/core/lib/iomgr/gethostname_host_name_max.cc',
+ 'src/core/lib/iomgr/gethostname_sysconf.cc',
+ 'src/core/lib/iomgr/grpc_if_nametoindex_posix.cc',
+ 'src/core/lib/iomgr/grpc_if_nametoindex_unsupported.cc',
+ 'src/core/lib/iomgr/internal_errqueue.cc',
+ 'src/core/lib/iomgr/iocp_windows.cc',
+ 'src/core/lib/iomgr/iomgr.cc',
+ 'src/core/lib/iomgr/iomgr_internal.cc',
+ 'src/core/lib/iomgr/iomgr_posix.cc',
+ 'src/core/lib/iomgr/iomgr_posix_cfstream.cc',
+ 'src/core/lib/iomgr/iomgr_windows.cc',
+ 'src/core/lib/iomgr/lockfree_event.cc',
+ 'src/core/lib/iomgr/polling_entity.cc',
+ 'src/core/lib/iomgr/pollset.cc',
+ 'src/core/lib/iomgr/pollset_set.cc',
+ 'src/core/lib/iomgr/pollset_set_windows.cc',
+ 'src/core/lib/iomgr/pollset_windows.cc',
+ 'src/core/lib/iomgr/resolve_address.cc',
+ 'src/core/lib/iomgr/resolve_address_posix.cc',
+ 'src/core/lib/iomgr/resolve_address_windows.cc',
+ 'src/core/lib/iomgr/sockaddr_utils_posix.cc',
+ 'src/core/lib/iomgr/socket_factory_posix.cc',
+ 'src/core/lib/iomgr/socket_mutator.cc',
+ 'src/core/lib/iomgr/socket_utils_common_posix.cc',
+ 'src/core/lib/iomgr/socket_utils_linux.cc',
+ 'src/core/lib/iomgr/socket_utils_posix.cc',
+ 'src/core/lib/iomgr/socket_utils_windows.cc',
+ 'src/core/lib/iomgr/socket_windows.cc',
+ 'src/core/lib/iomgr/systemd_utils.cc',
+ 'src/core/lib/iomgr/tcp_client.cc',
+ 'src/core/lib/iomgr/tcp_client_cfstream.cc',
+ 'src/core/lib/iomgr/tcp_client_posix.cc',
+ 'src/core/lib/iomgr/tcp_client_windows.cc',
+ 'src/core/lib/iomgr/tcp_posix.cc',
+ 'src/core/lib/iomgr/tcp_server.cc',
+ 'src/core/lib/iomgr/tcp_server_posix.cc',
+ 'src/core/lib/iomgr/tcp_server_utils_posix_common.cc',
+ 'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc',
+ 'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.cc',
+ 'src/core/lib/iomgr/tcp_server_windows.cc',
+ 'src/core/lib/iomgr/tcp_windows.cc',
+ 'src/core/lib/iomgr/timer.cc',
+ 'src/core/lib/iomgr/timer_generic.cc',
+ 'src/core/lib/iomgr/timer_heap.cc',
+ 'src/core/lib/iomgr/timer_manager.cc',
+ 'src/core/lib/iomgr/unix_sockets_posix.cc',
+ 'src/core/lib/iomgr/unix_sockets_posix_noop.cc',
+ 'src/core/lib/iomgr/vsock.cc',
+ 'src/core/lib/iomgr/wakeup_fd_eventfd.cc',
+ 'src/core/lib/iomgr/wakeup_fd_nospecial.cc',
+ 'src/core/lib/iomgr/wakeup_fd_pipe.cc',
+ 'src/core/lib/iomgr/wakeup_fd_posix.cc',
+ 'src/core/lib/json/json_object_loader.cc',
+ 'src/core/lib/json/json_reader.cc',
+ 'src/core/lib/json/json_util.cc',
+ 'src/core/lib/json/json_writer.cc',
+ 'src/core/lib/matchers/matchers.cc',
+ 'src/core/lib/promise/activity.cc',
+ 'src/core/lib/promise/party.cc',
+ 'src/core/lib/promise/sleep.cc',
+ 'src/core/lib/promise/trace.cc',
+ 'src/core/lib/resource_quota/api.cc',
+ 'src/core/lib/resource_quota/arena.cc',
+ 'src/core/lib/resource_quota/memory_quota.cc',
+ 'src/core/lib/resource_quota/periodic_update.cc',
+ 'src/core/lib/resource_quota/resource_quota.cc',
+ 'src/core/lib/resource_quota/thread_quota.cc',
+ 'src/core/lib/resource_quota/trace.cc',
+ 'src/core/lib/security/authorization/audit_logging.cc',
+ 'src/core/lib/security/authorization/authorization_policy_provider_vtable.cc',
+ 'src/core/lib/security/authorization/evaluate_args.cc',
+ 'src/core/lib/security/authorization/grpc_authorization_engine.cc',
+ 'src/core/lib/security/authorization/grpc_server_authz_filter.cc',
+ 'src/core/lib/security/authorization/matchers.cc',
+ 'src/core/lib/security/authorization/rbac_policy.cc',
+ 'src/core/lib/security/authorization/stdout_logger.cc',
+ 'src/core/lib/security/certificate_provider/certificate_provider_registry.cc',
+ 'src/core/lib/security/context/security_context.cc',
+ 'src/core/lib/security/credentials/alts/alts_credentials.cc',
+ 'src/core/lib/security/credentials/alts/check_gcp_environment.cc',
+ 'src/core/lib/security/credentials/alts/check_gcp_environment_linux.cc',
+ 'src/core/lib/security/credentials/alts/check_gcp_environment_no_op.cc',
+ 'src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc',
+ 'src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc',
+ 'src/core/lib/security/credentials/alts/grpc_alts_credentials_options.cc',
+ 'src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc',
+ 'src/core/lib/security/credentials/call_creds_util.cc',
+ 'src/core/lib/security/credentials/channel_creds_registry_init.cc',
+ 'src/core/lib/security/credentials/composite/composite_credentials.cc',
+ 'src/core/lib/security/credentials/credentials.cc',
+ 'src/core/lib/security/credentials/external/aws_external_account_credentials.cc',
+ 'src/core/lib/security/credentials/external/aws_request_signer.cc',
+ 'src/core/lib/security/credentials/external/external_account_credentials.cc',
+ 'src/core/lib/security/credentials/external/file_external_account_credentials.cc',
+ 'src/core/lib/security/credentials/external/url_external_account_credentials.cc',
+ 'src/core/lib/security/credentials/fake/fake_credentials.cc',
+ 'src/core/lib/security/credentials/google_default/credentials_generic.cc',
+ 'src/core/lib/security/credentials/google_default/google_default_credentials.cc',
+ 'src/core/lib/security/credentials/iam/iam_credentials.cc',
+ 'src/core/lib/security/credentials/insecure/insecure_credentials.cc',
+ 'src/core/lib/security/credentials/jwt/json_token.cc',
+ 'src/core/lib/security/credentials/jwt/jwt_credentials.cc',
+ 'src/core/lib/security/credentials/jwt/jwt_verifier.cc',
+ 'src/core/lib/security/credentials/local/local_credentials.cc',
+ 'src/core/lib/security/credentials/oauth2/oauth2_credentials.cc',
+ 'src/core/lib/security/credentials/plugin/plugin_credentials.cc',
+ 'src/core/lib/security/credentials/ssl/ssl_credentials.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_certificate_distributor.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_certificate_match.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_certificate_provider.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_certificate_verifier.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_credentials_options.cc',
+ 'src/core/lib/security/credentials/tls/grpc_tls_crl_provider.cc',
+ 'src/core/lib/security/credentials/tls/tls_credentials.cc',
+ 'src/core/lib/security/credentials/tls/tls_utils.cc',
+ 'src/core/lib/security/credentials/xds/xds_credentials.cc',
+ 'src/core/lib/security/security_connector/alts/alts_security_connector.cc',
+ 'src/core/lib/security/security_connector/fake/fake_security_connector.cc',
+ 'src/core/lib/security/security_connector/insecure/insecure_security_connector.cc',
+ 'src/core/lib/security/security_connector/load_system_roots_fallback.cc',
+ 'src/core/lib/security/security_connector/load_system_roots_supported.cc',
+ 'src/core/lib/security/security_connector/load_system_roots_windows.cc',
+ 'src/core/lib/security/security_connector/local/local_security_connector.cc',
+ 'src/core/lib/security/security_connector/security_connector.cc',
+ 'src/core/lib/security/security_connector/ssl/ssl_security_connector.cc',
+ 'src/core/lib/security/security_connector/ssl_utils.cc',
+ 'src/core/lib/security/security_connector/tls/tls_security_connector.cc',
+ 'src/core/lib/security/transport/client_auth_filter.cc',
+ 'src/core/lib/security/transport/legacy_server_auth_filter.cc',
+ 'src/core/lib/security/transport/secure_endpoint.cc',
+ 'src/core/lib/security/transport/security_handshaker.cc',
+ 'src/core/lib/security/transport/server_auth_filter.cc',
+ 'src/core/lib/security/transport/tsi_error.cc',
+ 'src/core/lib/security/util/json_util.cc',
+ 'src/core/lib/slice/b64.cc',
+ 'src/core/lib/slice/percent_encoding.cc',
+ 'src/core/lib/slice/slice.cc',
+ 'src/core/lib/slice/slice_buffer.cc',
+ 'src/core/lib/slice/slice_refcount.cc',
+ 'src/core/lib/slice/slice_string_helpers.cc',
+ 'src/core/lib/surface/api_trace.cc',
+ 'src/core/lib/surface/byte_buffer.cc',
+ 'src/core/lib/surface/byte_buffer_reader.cc',
+ 'src/core/lib/surface/call.cc',
+ 'src/core/lib/surface/call_details.cc',
+ 'src/core/lib/surface/call_log_batch.cc',
+ 'src/core/lib/surface/channel.cc',
+ 'src/core/lib/surface/channel_create.cc',
+ 'src/core/lib/surface/channel_init.cc',
+ 'src/core/lib/surface/channel_stack_type.cc',
+ 'src/core/lib/surface/completion_queue.cc',
+ 'src/core/lib/surface/completion_queue_factory.cc',
+ 'src/core/lib/surface/event_string.cc',
+ 'src/core/lib/surface/init.cc',
+ 'src/core/lib/surface/init_internally.cc',
+ 'src/core/lib/surface/lame_client.cc',
+ 'src/core/lib/surface/legacy_channel.cc',
+ 'src/core/lib/surface/metadata_array.cc',
+ 'src/core/lib/surface/server.cc',
+ 'src/core/lib/surface/validate_metadata.cc',
+ 'src/core/lib/surface/version.cc',
+ 'src/core/lib/surface/wait_for_cq_end_op.cc',
+ 'src/core/lib/transport/batch_builder.cc',
+ 'src/core/lib/transport/bdp_estimator.cc',
+ 'src/core/lib/transport/call_filters.cc',
+ 'src/core/lib/transport/call_final_info.cc',
+ 'src/core/lib/transport/call_size_estimator.cc',
+ 'src/core/lib/transport/call_spine.cc',
+ 'src/core/lib/transport/connectivity_state.cc',
+ 'src/core/lib/transport/error_utils.cc',
+ 'src/core/lib/transport/handshaker.cc',
+ 'src/core/lib/transport/handshaker_registry.cc',
+ 'src/core/lib/transport/http_connect_handshaker.cc',
+ 'src/core/lib/transport/message.cc',
+ 'src/core/lib/transport/metadata.cc',
+ 'src/core/lib/transport/metadata_batch.cc',
+ 'src/core/lib/transport/metadata_info.cc',
+ 'src/core/lib/transport/parsed_metadata.cc',
+ 'src/core/lib/transport/status_conversion.cc',
+ 'src/core/lib/transport/tcp_connect_handshaker.cc',
+ 'src/core/lib/transport/timeout_encoding.cc',
+ 'src/core/lib/transport/transport.cc',
+ 'src/core/lib/transport/transport_op_string.cc',
+ 'src/core/lib/uri/uri_parser.cc',
+ 'src/core/load_balancing/address_filtering.cc',
+ 'src/core/load_balancing/backend_metric_parser.cc',
+ 'src/core/load_balancing/child_policy_handler.cc',
+ 'src/core/load_balancing/endpoint_list.cc',
+ 'src/core/load_balancing/grpclb/client_load_reporting_filter.cc',
+ 'src/core/load_balancing/grpclb/grpclb.cc',
+ 'src/core/load_balancing/grpclb/grpclb_balancer_addresses.cc',
+ 'src/core/load_balancing/grpclb/grpclb_client_stats.cc',
+ 'src/core/load_balancing/grpclb/load_balancer_api.cc',
+ 'src/core/load_balancing/health_check_client.cc',
+ 'src/core/load_balancing/lb_policy.cc',
+ 'src/core/load_balancing/lb_policy_registry.cc',
+ 'src/core/load_balancing/oob_backend_metric.cc',
+ 'src/core/load_balancing/outlier_detection/outlier_detection.cc',
+ 'src/core/load_balancing/pick_first/pick_first.cc',
+ 'src/core/load_balancing/priority/priority.cc',
+ 'src/core/load_balancing/ring_hash/ring_hash.cc',
+ 'src/core/load_balancing/rls/rls.cc',
+ 'src/core/load_balancing/round_robin/round_robin.cc',
+ 'src/core/load_balancing/weighted_round_robin/static_stride_scheduler.cc',
+ 'src/core/load_balancing/weighted_round_robin/weighted_round_robin.cc',
+ 'src/core/load_balancing/weighted_target/weighted_target.cc',
+ 'src/core/load_balancing/xds/cds.cc',
+ 'src/core/load_balancing/xds/xds_cluster_impl.cc',
+ 'src/core/load_balancing/xds/xds_cluster_manager.cc',
+ 'src/core/load_balancing/xds/xds_override_host.cc',
+ 'src/core/load_balancing/xds/xds_wrr_locality.cc',
+ 'src/core/plugin_registry/grpc_plugin_registry.cc',
+ 'src/core/plugin_registry/grpc_plugin_registry_extra.cc',
+ 'src/core/resolver/binder/binder_resolver.cc',
+ 'src/core/resolver/dns/c_ares/dns_resolver_ares.cc',
+ 'src/core/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc',
+ 'src/core/resolver/dns/c_ares/grpc_ares_ev_driver_windows.cc',
+ 'src/core/resolver/dns/c_ares/grpc_ares_wrapper.cc',
+ 'src/core/resolver/dns/c_ares/grpc_ares_wrapper_posix.cc',
+ 'src/core/resolver/dns/c_ares/grpc_ares_wrapper_windows.cc',
+ 'src/core/resolver/dns/dns_resolver_plugin.cc',
+ 'src/core/resolver/dns/event_engine/event_engine_client_channel_resolver.cc',
+ 'src/core/resolver/dns/event_engine/service_config_helper.cc',
+ 'src/core/resolver/dns/native/dns_resolver.cc',
+ 'src/core/resolver/endpoint_addresses.cc',
+ 'src/core/resolver/fake/fake_resolver.cc',
+ 'src/core/resolver/google_c2p/google_c2p_resolver.cc',
+ 'src/core/resolver/polling_resolver.cc',
+ 'src/core/resolver/resolver.cc',
+ 'src/core/resolver/resolver_registry.cc',
+ 'src/core/resolver/sockaddr/sockaddr_resolver.cc',
+ 'src/core/resolver/xds/xds_dependency_manager.cc',
+ 'src/core/resolver/xds/xds_resolver.cc',
+ 'src/core/resolver/xds/xds_resolver_trace.cc',
+ 'src/core/service_config/service_config_channel_arg_filter.cc',
+ 'src/core/service_config/service_config_impl.cc',
+ 'src/core/service_config/service_config_parser.cc',
+ 'src/core/tsi/alts/crypt/aes_gcm.cc',
+ 'src/core/tsi/alts/crypt/gsec.cc',
+ 'src/core/tsi/alts/frame_protector/alts_counter.cc',
+ 'src/core/tsi/alts/frame_protector/alts_crypter.cc',
+ 'src/core/tsi/alts/frame_protector/alts_frame_protector.cc',
+ 'src/core/tsi/alts/frame_protector/alts_record_protocol_crypter_common.cc',
+ 'src/core/tsi/alts/frame_protector/alts_seal_privacy_integrity_crypter.cc',
+ 'src/core/tsi/alts/frame_protector/alts_unseal_privacy_integrity_crypter.cc',
+ 'src/core/tsi/alts/frame_protector/frame_handler.cc',
+ 'src/core/tsi/alts/handshaker/alts_handshaker_client.cc',
+ 'src/core/tsi/alts/handshaker/alts_shared_resource.cc',
+ 'src/core/tsi/alts/handshaker/alts_tsi_handshaker.cc',
+ 'src/core/tsi/alts/handshaker/alts_tsi_utils.cc',
+ 'src/core/tsi/alts/handshaker/transport_security_common_api.cc',
+ 'src/core/tsi/alts/zero_copy_frame_protector/alts_grpc_integrity_only_record_protocol.cc',
+ 'src/core/tsi/alts/zero_copy_frame_protector/alts_grpc_privacy_integrity_record_protocol.cc',
+ 'src/core/tsi/alts/zero_copy_frame_protector/alts_grpc_record_protocol_common.cc',
+ 'src/core/tsi/alts/zero_copy_frame_protector/alts_iovec_record_protocol.cc',
+ 'src/core/tsi/alts/zero_copy_frame_protector/alts_zero_copy_grpc_protector.cc',
+ 'src/core/tsi/fake_transport_security.cc',
+ 'src/core/tsi/local_transport_security.cc',
+ 'src/core/tsi/ssl/key_logging/ssl_key_logging.cc',
+ 'src/core/tsi/ssl/session_cache/ssl_session_boringssl.cc',
+ 'src/core/tsi/ssl/session_cache/ssl_session_cache.cc',
+ 'src/core/tsi/ssl/session_cache/ssl_session_openssl.cc',
+ 'src/core/tsi/ssl_transport_security.cc',
+ 'src/core/tsi/ssl_transport_security_utils.cc',
+ 'src/core/tsi/transport_security.cc',
+ 'src/core/tsi/transport_security_grpc.cc',
+ ],
+ },
+ {
+ 'target_name': 'grpc_test_util',
+ 'type': 'static_library',
+ 'dependencies': [
+ 'absl/debugging:failure_signal_handler',
+ 'absl/debugging:stacktrace',
+ 'absl/debugging:symbolize',
+ 'grpc',
+ ],
+ 'sources': [
+ 'test/core/event_engine/test_init.cc',
+ 'test/core/util/build.cc',
+ 'test/core/util/port.cc',
+ 'test/core/util/port_isolated_runtime_environment.cc',
+ 'test/core/util/port_server_client.cc',
+ 'test/core/util/reconnect_server.cc',
+ 'test/core/util/stack_tracer.cc',
+ 'test/core/util/test_config.cc',
+ 'test/core/util/test_tcp_server.cc',
+ 'test/core/util/tls_utils.cc',
+ ],
+ },
+ {
+ 'target_name': 'grpc_test_util_unsecure',
+ 'type': 'static_library',
+ 'dependencies': [
+ 'absl/debugging:failure_signal_handler',
+ 'absl/debugging:stacktrace',
+ 'absl/debugging:symbolize',
+ 'grpc_unsecure',
+ ],
+ 'sources': [
+ 'test/core/event_engine/test_init.cc',
+ 'test/core/util/build.cc',
+ 'test/core/util/port.cc',
+ 'test/core/util/port_isolated_runtime_environment.cc',
+ 'test/core/util/port_server_client.cc',
+ 'test/core/util/reconnect_server.cc',
+ 'test/core/util/stack_tracer.cc',
+ 'test/core/util/test_config.cc',
+ 'test/core/util/test_tcp_server.cc',
+ ],
+ },
+ {
+ 'target_name': 'grpc_unsecure',
+ 'type': 'static_library',
+ 'dependencies': [
+ 'upb_message_lib',
+ 'utf8_range_lib',
+ 'z',
+ 'absl/algorithm:container',
+ 'absl/base:config',
+ 'absl/base:no_destructor',
+ 'absl/cleanup:cleanup',
+ 'absl/container:flat_hash_map',
+ 'absl/container:flat_hash_set',
+ 'absl/container:inlined_vector',
+ 'absl/functional:bind_front',
+ 'absl/functional:function_ref',
+ 'absl/hash:hash',
+ 'absl/meta:type_traits',
+ 'absl/random:bit_gen_ref',
+ 'absl/random:distributions',
+ 'absl/status:statusor',
+ 'absl/types:span',
+ 'absl/utility:utility',
+ 'cares',
+ 'gpr',
+ 'address_sorting',
+ ],
+ 'sources': [
+ 'src/core/client_channel/backup_poller.cc',
+ 'src/core/client_channel/client_channel.cc',
+ 'src/core/client_channel/client_channel_channelz.cc',
+ 'src/core/client_channel/client_channel_factory.cc',
+ 'src/core/client_channel/client_channel_filter.cc',
+ 'src/core/client_channel/client_channel_plugin.cc',
+ 'src/core/client_channel/client_channel_service_config.cc',
+ 'src/core/client_channel/config_selector.cc',
+ 'src/core/client_channel/dynamic_filters.cc',
+ 'src/core/client_channel/global_subchannel_pool.cc',
+ 'src/core/client_channel/http_proxy_mapper.cc',
+ 'src/core/client_channel/local_subchannel_pool.cc',
+ 'src/core/client_channel/retry_filter.cc',
+ 'src/core/client_channel/retry_filter_legacy_call_data.cc',
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+ 'src/core/lib/security/authorization/stdout_logger.cc',
+ 'src/core/lib/security/certificate_provider/certificate_provider_registry.cc',
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+ 'third_party/upb/upb/wire/reader.c',
+ ],
+ },
+ {
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+ ],
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+ 'src/compiler/ruby_generator.cc',
+ ],
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+ 'src/cpp/server/channelz/channelz_service_plugin.cc',
+ ],
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+ 'third_party/boringssl-with-bazel/src/crypto/cipher_extra/e_null.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cipher_extra/e_rc2.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cipher_extra/e_rc4.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cipher_extra/e_tls.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cipher_extra/tls_cbc.c',
+ 'third_party/boringssl-with-bazel/src/crypto/conf/conf.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_apple.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_fuchsia.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_linux.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_openbsd.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_sysreg.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_aarch64_win.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_arm_freebsd.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_arm_linux.c',
+ 'third_party/boringssl-with-bazel/src/crypto/cpu_intel.c',
+ 'third_party/boringssl-with-bazel/src/crypto/crypto.c',
+ 'third_party/boringssl-with-bazel/src/crypto/curve25519/curve25519.c',
+ 'third_party/boringssl-with-bazel/src/crypto/curve25519/curve25519_64_adx.c',
+ 'third_party/boringssl-with-bazel/src/crypto/curve25519/spake25519.c',
+ 'third_party/boringssl-with-bazel/src/crypto/des/des.c',
+ 'third_party/boringssl-with-bazel/src/crypto/dh_extra/dh_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/dh_extra/params.c',
+ 'third_party/boringssl-with-bazel/src/crypto/digest_extra/digest_extra.c',
+ 'third_party/boringssl-with-bazel/src/crypto/dsa/dsa.c',
+ 'third_party/boringssl-with-bazel/src/crypto/dsa/dsa_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ec_extra/ec_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ec_extra/ec_derive.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ec_extra/hash_to_curve.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ecdh_extra/ecdh_extra.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ecdsa_extra/ecdsa_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/engine/engine.c',
+ 'third_party/boringssl-with-bazel/src/crypto/err/err.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/evp.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/evp_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/evp_ctx.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_dsa_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_ec.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_ec_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_ed25519.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_ed25519_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_hkdf.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_rsa.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_rsa_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_x25519.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/p_x25519_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/pbkdf.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/print.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/scrypt.c',
+ 'third_party/boringssl-with-bazel/src/crypto/evp/sign.c',
+ 'third_party/boringssl-with-bazel/src/crypto/ex_data.c',
+ 'third_party/boringssl-with-bazel/src/crypto/fipsmodule/bcm.c',
+ 'third_party/boringssl-with-bazel/src/crypto/fipsmodule/fips_shared_support.c',
+ 'third_party/boringssl-with-bazel/src/crypto/hpke/hpke.c',
+ 'third_party/boringssl-with-bazel/src/crypto/hrss/hrss.c',
+ 'third_party/boringssl-with-bazel/src/crypto/keccak/keccak.c',
+ 'third_party/boringssl-with-bazel/src/crypto/kyber/kyber.c',
+ 'third_party/boringssl-with-bazel/src/crypto/lhash/lhash.c',
+ 'third_party/boringssl-with-bazel/src/crypto/mem.c',
+ 'third_party/boringssl-with-bazel/src/crypto/obj/obj.c',
+ 'third_party/boringssl-with-bazel/src/crypto/obj/obj_xref.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_all.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_info.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_lib.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_oth.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_pk8.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_pkey.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pem/pem_xaux.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pkcs7/pkcs7.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pkcs7/pkcs7_x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pkcs8/p5_pbev2.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pkcs8/pkcs8.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pkcs8/pkcs8_x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/poly1305/poly1305.c',
+ 'third_party/boringssl-with-bazel/src/crypto/poly1305/poly1305_arm.c',
+ 'third_party/boringssl-with-bazel/src/crypto/poly1305/poly1305_vec.c',
+ 'third_party/boringssl-with-bazel/src/crypto/pool/pool.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/forkunsafe.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/getentropy.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/ios.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/passive.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/rand_extra.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/trusty.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rand_extra/windows.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rc4/rc4.c',
+ 'third_party/boringssl-with-bazel/src/crypto/refcount.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rsa_extra/rsa_asn1.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rsa_extra/rsa_crypt.c',
+ 'third_party/boringssl-with-bazel/src/crypto/rsa_extra/rsa_print.c',
+ 'third_party/boringssl-with-bazel/src/crypto/siphash/siphash.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/address.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/fors.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/merkle.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/spx.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/spx_util.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/thash.c',
+ 'third_party/boringssl-with-bazel/src/crypto/spx/wots.c',
+ 'third_party/boringssl-with-bazel/src/crypto/stack/stack.c',
+ 'third_party/boringssl-with-bazel/src/crypto/thread.c',
+ 'third_party/boringssl-with-bazel/src/crypto/thread_none.c',
+ 'third_party/boringssl-with-bazel/src/crypto/thread_pthread.c',
+ 'third_party/boringssl-with-bazel/src/crypto/thread_win.c',
+ 'third_party/boringssl-with-bazel/src/crypto/trust_token/pmbtoken.c',
+ 'third_party/boringssl-with-bazel/src/crypto/trust_token/trust_token.c',
+ 'third_party/boringssl-with-bazel/src/crypto/trust_token/voprf.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/a_digest.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/a_sign.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/a_verify.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/algorithm.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/asn1_gen.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/by_dir.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/by_file.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/i2d_pr.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/name_print.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/policy.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/rsa_pss.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/t_crl.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/t_req.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/t_x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/t_x509a.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_akey.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_akeya.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_alt.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_bcons.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_bitst.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_conf.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_cpols.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_crld.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_enum.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_extku.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_genn.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_ia5.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_info.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_int.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_lib.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_ncons.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_ocsp.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_pcons.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_pmaps.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_prn.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_purp.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_skey.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/v3_utl.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_att.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_cmp.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_d2.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_def.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_ext.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_lu.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_obj.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_req.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_set.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_trs.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_txt.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_v3.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_vfy.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509_vpm.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509cset.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509name.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509rset.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x509spki.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_algor.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_all.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_attrib.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_crl.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_exten.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_name.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_pubkey.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_req.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_sig.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_spki.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_val.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_x509.c',
+ 'third_party/boringssl-with-bazel/src/crypto/x509/x_x509a.c',
+ 'third_party/boringssl-with-bazel/src/ssl/bio_ssl.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/d1_both.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/d1_lib.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/d1_pkt.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/d1_srtp.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/dtls_method.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/dtls_record.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/encrypted_client_hello.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/extensions.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/handoff.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/handshake.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/handshake_client.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/handshake_server.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/s3_both.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/s3_lib.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/s3_pkt.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_aead_ctx.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_asn1.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_buffer.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_cert.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_cipher.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_file.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_key_share.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_lib.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_privkey.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_session.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_stat.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_transcript.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_versions.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/ssl_x509.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/t1_enc.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls13_both.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls13_client.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls13_enc.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls13_server.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls_method.cc',
+ 'third_party/boringssl-with-bazel/src/ssl/tls_record.cc',
+ ],
+ },
+ {
+ 'target_name': 'boringssl_test_util',
+ 'type': 'static_library',
+ 'dependencies': [
+ ],
+ 'sources': [
+ 'third_party/boringssl-with-bazel/src/crypto/test/abi_test.cc',
+ 'third_party/boringssl-with-bazel/src/crypto/test/file_test.cc',
+ 'third_party/boringssl-with-bazel/src/crypto/test/test_util.cc',
+ 'third_party/boringssl-with-bazel/src/crypto/test/wycheproof_util.cc',
+ ],
+ },
+ {
+ 'target_name': 'benchmark',
+ 'type': 'static_library',
+ 'dependencies': [
+ ],
+ 'sources': [
+ 'third_party/benchmark/src/benchmark.cc',
+ 'third_party/benchmark/src/benchmark_api_internal.cc',
+ 'third_party/benchmark/src/benchmark_main.cc',
+ 'third_party/benchmark/src/benchmark_name.cc',
+ 'third_party/benchmark/src/benchmark_register.cc',
+ 'third_party/benchmark/src/benchmark_runner.cc',
+ 'third_party/benchmark/src/check.cc',
+ 'third_party/benchmark/src/colorprint.cc',
+ 'third_party/benchmark/src/commandlineflags.cc',
+ 'third_party/benchmark/src/complexity.cc',
+ 'third_party/benchmark/src/console_reporter.cc',
+ 'third_party/benchmark/src/counter.cc',
+ 'third_party/benchmark/src/csv_reporter.cc',
+ 'third_party/benchmark/src/json_reporter.cc',
+ 'third_party/benchmark/src/perf_counters.cc',
+ 'third_party/benchmark/src/reporter.cc',
+ 'third_party/benchmark/src/statistics.cc',
+ 'third_party/benchmark/src/string_util.cc',
+ 'third_party/benchmark/src/sysinfo.cc',
+ 'third_party/benchmark/src/timers.cc',
+ ],
+ },
+ ]
+}
diff --git a/package.xml b/package.xml
index 647d5677ee5..ece4e779a1e 100644
--- a/package.xml
+++ b/package.xml
@@ -113,6 +113,8 @@
+
+
@@ -1529,6 +1531,7 @@
+
diff --git a/src/core/BUILD b/src/core/BUILD
index c0432c3f37f..81adcd19b91 100644
--- a/src/core/BUILD
+++ b/src/core/BUILD
@@ -7483,6 +7483,8 @@ grpc_cc_library(
"1999",
"call_arena_allocator",
"call_filters",
+ "call_final_info",
+ "dual_ref_counted",
"for_each",
"if",
"latch",
diff --git a/src/core/client_channel/client_channel.cc b/src/core/client_channel/client_channel.cc
new file mode 100644
index 00000000000..57a30a517e0
--- /dev/null
+++ b/src/core/client_channel/client_channel.cc
@@ -0,0 +1,1977 @@
+//
+// Copyright 2015 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include
+
+#include "src/core/client_channel/client_channel.h"
+
+#include
+#include
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include "absl/cleanup/cleanup.h"
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "absl/strings/cord.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_join.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "absl/types/variant.h"
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include "src/core/ext/filters/channel_idle/channel_idle_filter.h"
+#include "src/core/client_channel/backup_poller.h"
+#include "src/core/client_channel/client_channel_channelz.h"
+#include "src/core/client_channel/client_channel_internal.h"
+#include "src/core/client_channel/client_channel_service_config.h"
+#include "src/core/client_channel/config_selector.h"
+#include "src/core/client_channel/dynamic_filters.h"
+#include "src/core/client_channel/global_subchannel_pool.h"
+#include "src/core/client_channel/local_subchannel_pool.h"
+#include "src/core/client_channel/retry_filter.h"
+#include "src/core/client_channel/subchannel.h"
+#include "src/core/client_channel/subchannel_interface_internal.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/channel/channel_trace.h"
+#include "src/core/lib/channel/metrics.h"
+#include "src/core/lib/channel/promise_based_filter.h"
+#include "src/core/lib/channel/status_util.h"
+#include "src/core/lib/config/core_configuration.h"
+#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/experiments/experiments.h"
+#include "src/core/lib/gpr/useful.h"
+#include "src/core/lib/gprpp/crash.h"
+#include "src/core/lib/gprpp/debug_location.h"
+#include "src/core/lib/gprpp/manual_constructor.h"
+#include "src/core/lib/gprpp/status_helper.h"
+#include "src/core/lib/gprpp/sync.h"
+#include "src/core/lib/gprpp/unique_type_name.h"
+#include "src/core/lib/gprpp/work_serializer.h"
+#include "src/core/lib/handshaker/proxy_mapper_registry.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/resolved_address.h"
+#include "src/core/lib/json/json.h"
+#include "src/core/lib/promise/cancel_callback.h"
+#include "src/core/lib/promise/context.h"
+#include "src/core/lib/promise/exec_ctx_wakeup_scheduler.h"
+#include "src/core/lib/promise/latch.h"
+#include "src/core/lib/promise/map.h"
+#include "src/core/lib/promise/pipe.h"
+#include "src/core/lib/promise/poll.h"
+#include "src/core/lib/promise/promise.h"
+#include "src/core/lib/promise/sleep.h"
+#include "src/core/lib/promise/status_flag.h"
+#include "src/core/lib/promise/try_seq.h"
+#include "src/core/lib/resource_quota/resource_quota.h"
+#include "src/core/lib/security/credentials/credentials.h"
+#include "src/core/lib/slice/slice.h"
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/surface/call.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/surface/completion_queue.h"
+#include "src/core/lib/transport/call_spine.h"
+#include "src/core/lib/transport/connectivity_state.h"
+#include "src/core/lib/transport/error_utils.h"
+#include "src/core/lib/transport/metadata_batch.h"
+#include "src/core/load_balancing/backend_metric_parser.h"
+#include "src/core/load_balancing/child_policy_handler.h"
+#include "src/core/load_balancing/lb_policy.h"
+#include "src/core/load_balancing/lb_policy_registry.h"
+#include "src/core/load_balancing/subchannel_interface.h"
+#include "src/core/resolver/endpoint_addresses.h"
+#include "src/core/resolver/resolver_registry.h"
+#include "src/core/service_config/service_config_call_data.h"
+#include "src/core/service_config/service_config_impl.h"
+
+namespace grpc_core {
+
+using grpc_event_engine::experimental::EventEngine;
+
+using internal::ClientChannelMethodParsedConfig;
+
+// Defined in legacy client channel filter.
+// TODO(roth): Move these here when we remove the legacy filter.
+extern TraceFlag grpc_client_channel_trace;
+extern TraceFlag grpc_client_channel_call_trace;
+extern TraceFlag grpc_client_channel_lb_call_trace;
+
+//
+// ClientChannel::ResolverResultHandler
+//
+
+class ClientChannel::ResolverResultHandler : public Resolver::ResultHandler {
+ public:
+ explicit ResolverResultHandler(
+ RefCountedPtr client_channel)
+ : client_channel_(std::move(client_channel)) {}
+
+ ~ResolverResultHandler() override {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: resolver shutdown complete",
+ client_channel_.get());
+ }
+ }
+
+ void ReportResult(Resolver::Result result) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ client_channel_->OnResolverResultChangedLocked(std::move(result));
+ }
+
+ private:
+ RefCountedPtr client_channel_;
+};
+
+//
+// ClientChannel::SubchannelWrapper
+//
+
+// This class is a wrapper for Subchannel that hides details of the
+// channel's implementation (such as the connected subchannel) from the
+// LB policy API.
+//
+// Note that no synchronization is needed here, because even if the
+// underlying subchannel is shared between channels, this wrapper will only
+// be used within one channel, so it will always be synchronized by the
+// control plane work_serializer.
+class ClientChannel::SubchannelWrapper : public SubchannelInterface {
+ public:
+ SubchannelWrapper(RefCountedPtr client_channel,
+ RefCountedPtr subchannel)
+ : SubchannelInterface(GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)
+ ? "SubchannelWrapper"
+ : nullptr),
+ client_channel_(std::move(client_channel)),
+ subchannel_(std::move(subchannel)) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(
+ GPR_INFO,
+ "client_channel=%p: creating subchannel wrapper %p for subchannel %p",
+ client_channel_.get(), this, subchannel_.get());
+ }
+ GPR_DEBUG_ASSERT(
+ client_channel_->work_serializer_->RunningInWorkSerializer());
+ if (client_channel_->channelz_node_ != nullptr) {
+ auto* subchannel_node = subchannel_->channelz_node();
+ if (subchannel_node != nullptr) {
+ auto it =
+ client_channel_->subchannel_refcount_map_.find(subchannel_.get());
+ if (it == client_channel_->subchannel_refcount_map_.end()) {
+ client_channel_->channelz_node_->AddChildSubchannel(
+ subchannel_node->uuid());
+ it = client_channel_->subchannel_refcount_map_.emplace(
+ subchannel_.get(), 0)
+ .first;
+ }
+ ++it->second;
+ }
+ }
+ client_channel_->subchannel_wrappers_.insert(this);
+ }
+
+ ~SubchannelWrapper() override {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: destroying subchannel wrapper %p "
+ "for subchannel %p",
+ client_channel_.get(), this, subchannel_.get());
+ }
+ }
+
+ void Orphan() override {
+ // Make sure we clean up the channel's subchannel maps inside the
+ // WorkSerializer.
+ WeakRefAsSubclass(
+ DEBUG_LOCATION, "subchannel map cleanup")
+ .release();
+ client_channel_->work_serializer_->Run(
+ [this]()
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ client_channel_->subchannel_wrappers_.erase(this);
+ if (client_channel_->channelz_node_ != nullptr) {
+ auto* subchannel_node = subchannel_->channelz_node();
+ if (subchannel_node != nullptr) {
+ auto it = client_channel_->subchannel_refcount_map_.find(
+ subchannel_.get());
+ GPR_ASSERT(it != client_channel_->subchannel_refcount_map_.end());
+ --it->second;
+ if (it->second == 0) {
+ client_channel_->channelz_node_->RemoveChildSubchannel(
+ subchannel_node->uuid());
+ client_channel_->subchannel_refcount_map_.erase(it);
+ }
+ }
+ }
+ WeakUnref(DEBUG_LOCATION, "subchannel map cleanup");
+ },
+ DEBUG_LOCATION);
+ }
+
+ void WatchConnectivityState(
+ std::unique_ptr watcher) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ auto& watcher_wrapper = watcher_map_[watcher.get()];
+ GPR_ASSERT(watcher_wrapper == nullptr);
+ watcher_wrapper = new WatcherWrapper(
+ std::move(watcher),
+ RefAsSubclass(DEBUG_LOCATION, "WatcherWrapper"));
+ subchannel_->WatchConnectivityState(
+ RefCountedPtr(
+ watcher_wrapper));
+ }
+
+ void CancelConnectivityStateWatch(ConnectivityStateWatcherInterface* watcher)
+ override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ auto it = watcher_map_.find(watcher);
+ GPR_ASSERT(it != watcher_map_.end());
+ subchannel_->CancelConnectivityStateWatch(it->second);
+ watcher_map_.erase(it);
+ }
+
+ RefCountedPtr connected_subchannel() const {
+ return subchannel_->connected_subchannel();
+ }
+
+ void RequestConnection() override { subchannel_->RequestConnection(); }
+
+ void ResetBackoff() override { subchannel_->ResetBackoff(); }
+
+ void AddDataWatcher(std::unique_ptr watcher) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ static_cast(watcher.get())
+ ->SetSubchannel(subchannel_.get());
+ GPR_ASSERT(data_watchers_.insert(std::move(watcher)).second);
+ }
+
+ void CancelDataWatcher(DataWatcherInterface* watcher) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ auto it = data_watchers_.find(watcher);
+ if (it != data_watchers_.end()) data_watchers_.erase(it);
+ }
+
+ void ThrottleKeepaliveTime(int new_keepalive_time) {
+ subchannel_->ThrottleKeepaliveTime(new_keepalive_time);
+ }
+
+ private:
+ // This wrapper provides a bridge between the internal Subchannel API
+ // and the SubchannelInterface API that we expose to LB policies.
+ // It implements Subchannel::ConnectivityStateWatcherInterface and wraps
+ // the instance of SubchannelInterface::ConnectivityStateWatcherInterface
+ // that was passed in by the LB policy. We pass an instance of this
+ // class to the underlying Subchannel, and when we get updates from
+ // the subchannel, we pass those on to the wrapped watcher to return
+ // the update to the LB policy.
+ //
+ // This class handles things like hopping into the WorkSerializer
+ // before passing notifications to the LB policy and propagating
+ // keepalive information betwen subchannels.
+ class WatcherWrapper : public Subchannel::ConnectivityStateWatcherInterface {
+ public:
+ WatcherWrapper(
+ std::unique_ptr
+ watcher,
+ RefCountedPtr subchannel_wrapper)
+ : watcher_(std::move(watcher)),
+ subchannel_wrapper_(std::move(subchannel_wrapper)) {}
+
+ ~WatcherWrapper() override {
+ subchannel_wrapper_.reset(DEBUG_LOCATION, "WatcherWrapper");
+ }
+
+ void OnConnectivityStateChange(
+ RefCountedPtr self,
+ grpc_connectivity_state state, const absl::Status& status) override {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: connectivity change for subchannel "
+ "wrapper %p subchannel %p; hopping into work_serializer",
+ subchannel_wrapper_->client_channel_.get(),
+ subchannel_wrapper_.get(),
+ subchannel_wrapper_->subchannel_.get());
+ }
+ self.release(); // Held by callback.
+ subchannel_wrapper_->client_channel_->work_serializer_->Run(
+ [this, state, status]()
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(
+ *subchannel_wrapper_->client_channel_->work_serializer_) {
+ ApplyUpdateInControlPlaneWorkSerializer(state, status);
+ Unref();
+ },
+ DEBUG_LOCATION);
+ }
+
+ grpc_pollset_set* interested_parties() override {
+ return watcher_->interested_parties();
+ }
+
+ private:
+ void ApplyUpdateInControlPlaneWorkSerializer(grpc_connectivity_state state,
+ const absl::Status& status)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(
+ *subchannel_wrapper_->client_channel_->work_serializer_) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: processing connectivity change in work "
+ "serializer for subchannel wrapper %p subchannel %p watcher=%p "
+ "state=%s status=%s",
+ subchannel_wrapper_->client_channel_.get(),
+ subchannel_wrapper_.get(),
+ subchannel_wrapper_->subchannel_.get(), watcher_.get(),
+ ConnectivityStateName(state), status.ToString().c_str());
+ }
+ absl::optional keepalive_throttling =
+ status.GetPayload(kKeepaliveThrottlingKey);
+ if (keepalive_throttling.has_value()) {
+ int new_keepalive_time = -1;
+ if (absl::SimpleAtoi(std::string(keepalive_throttling.value()),
+ &new_keepalive_time)) {
+ if (new_keepalive_time >
+ subchannel_wrapper_->client_channel_->keepalive_time_) {
+ subchannel_wrapper_->client_channel_->keepalive_time_ =
+ new_keepalive_time;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: throttling keepalive time to %d",
+ subchannel_wrapper_->client_channel_.get(),
+ subchannel_wrapper_->client_channel_->keepalive_time_);
+ }
+ // Propagate the new keepalive time to all subchannels. This is so
+ // that new transports created by any subchannel (and not just the
+ // subchannel that received the GOAWAY), use the new keepalive time.
+ for (auto* subchannel_wrapper :
+ subchannel_wrapper_->client_channel_->subchannel_wrappers_) {
+ subchannel_wrapper->ThrottleKeepaliveTime(new_keepalive_time);
+ }
+ }
+ } else {
+ gpr_log(GPR_ERROR,
+ "client_channel=%p: Illegal keepalive throttling value %s",
+ subchannel_wrapper_->client_channel_.get(),
+ std::string(keepalive_throttling.value()).c_str());
+ }
+ }
+ // Propagate status only in state TF.
+ // We specifically want to avoid propagating the status for
+ // state IDLE that the real subchannel gave us only for the
+ // purpose of keepalive propagation.
+ watcher_->OnConnectivityStateChange(
+ state,
+ state == GRPC_CHANNEL_TRANSIENT_FAILURE ? status : absl::OkStatus());
+ }
+
+ std::unique_ptr
+ watcher_;
+ RefCountedPtr subchannel_wrapper_;
+ };
+
+ // A heterogenous lookup comparator for data watchers that allows
+ // unique_ptr keys to be looked up as raw pointers.
+ struct DataWatcherLessThan {
+ using is_transparent = void;
+ bool operator()(const std::unique_ptr& p1,
+ const std::unique_ptr& p2) const {
+ return p1 < p2;
+ }
+ bool operator()(const std::unique_ptr& p1,
+ const DataWatcherInterface* p2) const {
+ return p1.get() < p2;
+ }
+ bool operator()(const DataWatcherInterface* p1,
+ const std::unique_ptr& p2) const {
+ return p1 < p2.get();
+ }
+ };
+
+ RefCountedPtr client_channel_;
+ RefCountedPtr subchannel_;
+ // Maps from the address of the watcher passed to us by the LB policy
+ // to the address of the WrapperWatcher that we passed to the underlying
+ // subchannel. This is needed so that when the LB policy calls
+ // CancelConnectivityStateWatch() with its watcher, we know the
+ // corresponding WrapperWatcher to cancel on the underlying subchannel.
+ std::map watcher_map_
+ ABSL_GUARDED_BY(*client_channel_->work_serializer_);
+ std::set, DataWatcherLessThan>
+ data_watchers_ ABSL_GUARDED_BY(*client_channel_->work_serializer_);
+};
+
+//
+// ClientChannel::ClientChannelControlHelper
+//
+
+class ClientChannel::ClientChannelControlHelper
+ : public LoadBalancingPolicy::ChannelControlHelper {
+ public:
+ explicit ClientChannelControlHelper(
+ RefCountedPtr client_channel)
+ : client_channel_(std::move(client_channel)) {}
+
+ ~ClientChannelControlHelper() override {
+ client_channel_.reset(DEBUG_LOCATION, "ClientChannelControlHelper");
+ }
+
+ RefCountedPtr CreateSubchannel(
+ const grpc_resolved_address& address, const ChannelArgs& per_address_args,
+ const ChannelArgs& args) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ // If shutting down, do nothing.
+ if (client_channel_->resolver_ == nullptr) return nullptr;
+ ChannelArgs subchannel_args = Subchannel::MakeSubchannelArgs(
+ args, per_address_args, client_channel_->subchannel_pool_,
+ client_channel_->default_authority_);
+ // Create subchannel.
+ RefCountedPtr subchannel =
+ client_channel_->client_channel_factory_->CreateSubchannel(
+ address, subchannel_args);
+ if (subchannel == nullptr) return nullptr;
+ // Make sure the subchannel has updated keepalive time.
+ subchannel->ThrottleKeepaliveTime(client_channel_->keepalive_time_);
+ // Create and return wrapper for the subchannel.
+ return MakeRefCounted(client_channel_,
+ std::move(subchannel));
+ }
+
+ void UpdateState(grpc_connectivity_state state, const absl::Status& status,
+ RefCountedPtr picker)
+ override ABSL_EXCLUSIVE_LOCKS_REQUIRED(
+ *client_channel_->work_serializer_) {
+ if (client_channel_->resolver_ == nullptr) return; // Shutting down.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ const char* extra = client_channel_->disconnect_error_.ok()
+ ? ""
+ : " (ignoring -- channel shutting down)";
+ gpr_log(GPR_INFO,
+ "client_channel=%p: update: state=%s status=(%s) picker=%p%s",
+ client_channel_.get(), ConnectivityStateName(state),
+ status.ToString().c_str(), picker.get(), extra);
+ }
+ // Do update only if not shutting down.
+ if (client_channel_->disconnect_error_.ok()) {
+ client_channel_->UpdateStateAndPickerLocked(state, status, "helper",
+ std::move(picker));
+ }
+ }
+
+ void RequestReresolution() override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ if (client_channel_->resolver_ == nullptr) return; // Shutting down.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: started name re-resolving",
+ client_channel_.get());
+ }
+ client_channel_->resolver_->RequestReresolutionLocked();
+ }
+
+ absl::string_view GetTarget() override { return client_channel_->target(); }
+
+ absl::string_view GetAuthority() override {
+ return client_channel_->default_authority_;
+ }
+
+ RefCountedPtr GetChannelCredentials() override {
+ return client_channel_->channel_args_.GetObject()
+ ->duplicate_without_call_credentials();
+ }
+
+ RefCountedPtr GetUnsafeChannelCredentials()
+ override {
+ return client_channel_->channel_args_.GetObject()
+ ->Ref();
+ }
+
+ EventEngine* GetEventEngine() override {
+ return client_channel_->event_engine();
+ }
+
+ GlobalStatsPluginRegistry::StatsPluginGroup& GetStatsPluginGroup() override {
+ return client_channel_->stats_plugin_group_;
+ }
+
+ void AddTraceEvent(TraceSeverity severity, absl::string_view message) override
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*client_channel_->work_serializer_) {
+ if (client_channel_->resolver_ == nullptr) return; // Shutting down.
+ if (client_channel_->channelz_node_ != nullptr) {
+ client_channel_->channelz_node_->AddTraceEvent(
+ ConvertSeverityEnum(severity),
+ grpc_slice_from_copied_buffer(message.data(), message.size()));
+ }
+ }
+
+ private:
+ static channelz::ChannelTrace::Severity ConvertSeverityEnum(
+ TraceSeverity severity) {
+ if (severity == TRACE_INFO) return channelz::ChannelTrace::Info;
+ if (severity == TRACE_WARNING) return channelz::ChannelTrace::Warning;
+ return channelz::ChannelTrace::Error;
+ }
+
+ RefCountedPtr client_channel_;
+};
+
+//
+// ClientChannel::LoadBalancedCallDestination
+//
+
+// Context type for subchannel call tracker.
+template <>
+struct ContextType {};
+
+// Context type for LB on_commit callback.
+using LbOnCommit = absl::AnyInvocable;
+template <>
+struct ContextType {};
+
+namespace {
+
+class LbMetadata : public LoadBalancingPolicy::MetadataInterface {
+ public:
+ explicit LbMetadata(grpc_metadata_batch* batch) : batch_(batch) {}
+
+ void Add(absl::string_view key, absl::string_view value) override {
+ if (batch_ == nullptr) return;
+ // Gross, egregious hack to support legacy grpclb behavior.
+ // TODO(ctiller): Use a promise context for this once that plumbing is done.
+ if (key == GrpcLbClientStatsMetadata::key()) {
+ batch_->Set(
+ GrpcLbClientStatsMetadata(),
+ const_cast(
+ reinterpret_cast(value.data())));
+ return;
+ }
+ batch_->Append(key, Slice::FromStaticString(value),
+ [key](absl::string_view error, const Slice& value) {
+ gpr_log(GPR_ERROR, "%s",
+ absl::StrCat(error, " key:", key,
+ " value:", value.as_string_view())
+ .c_str());
+ });
+ }
+
+ std::vector> TestOnlyCopyToVector()
+ override {
+ if (batch_ == nullptr) return {};
+ Encoder encoder;
+ batch_->Encode(&encoder);
+ return encoder.Take();
+ }
+
+ absl::optional Lookup(absl::string_view key,
+ std::string* buffer) const override {
+ if (batch_ == nullptr) return absl::nullopt;
+ return batch_->GetStringValue(key, buffer);
+ }
+
+ private:
+ class Encoder {
+ public:
+ void Encode(const Slice& key, const Slice& value) {
+ out_.emplace_back(std::string(key.as_string_view()),
+ std::string(value.as_string_view()));
+ }
+
+ template
+ void Encode(Which, const typename Which::ValueType& value) {
+ auto value_slice = Which::Encode(value);
+ out_.emplace_back(std::string(Which::key()),
+ std::string(value_slice.as_string_view()));
+ }
+
+ void Encode(GrpcTimeoutMetadata,
+ const typename GrpcTimeoutMetadata::ValueType&) {}
+ void Encode(HttpPathMetadata, const Slice&) {}
+ void Encode(HttpMethodMetadata,
+ const typename HttpMethodMetadata::ValueType&) {}
+
+ std::vector> Take() {
+ return std::move(out_);
+ }
+
+ private:
+ std::vector> out_;
+ };
+
+ grpc_metadata_batch* batch_;
+};
+
+ClientCallTracer* GetCallTracerFromContext() {
+ auto* legacy_context = GetContext();
+ return static_cast(
+ legacy_context[GRPC_CONTEXT_CALL_TRACER_ANNOTATION_INTERFACE].value);
+}
+
+void MaybeCreateCallAttemptTracer(bool is_transparent_retry) {
+ auto* call_tracer = GetCallTracerFromContext();
+ if (call_tracer == nullptr) return;
+ auto* tracer = call_tracer->StartNewAttempt(is_transparent_retry);
+ auto* legacy_context = GetContext();
+ legacy_context[GRPC_CONTEXT_CALL_TRACER].value = tracer;
+}
+
+ClientCallTracer::CallAttemptTracer* GetCallAttemptTracerFromContext() {
+ auto* legacy_context = GetContext();
+ return static_cast(
+ legacy_context[GRPC_CONTEXT_CALL_TRACER].value);
+}
+
+// A filter to handle updating with the call tracer and LB subchannel
+// call tracker inside the LB call.
+// FIXME: move this to its own file, register only when call v3
+// experiment is enabled
+class LbCallTracingFilter : public ImplementChannelFilter {
+ public:
+ static absl::StatusOr Create(const ChannelArgs&,
+ ChannelFilter::Args) {
+ return LbCallTracingFilter();
+ }
+
+ class Call {
+ public:
+ void OnClientInitialMetadata(ClientMetadata& metadata) {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ if (tracer == nullptr) return;
+ tracer->RecordSendInitialMetadata(&metadata);
+ }
+
+ void OnServerInitialMetadata(ServerMetadata& metadata) {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ if (tracer == nullptr) return;
+ tracer->RecordReceivedInitialMetadata(&metadata);
+ // Save peer string for later use.
+ Slice* peer_string = metadata.get_pointer(PeerString());
+ if (peer_string != nullptr) peer_string_ = peer_string->Ref();
+ }
+
+ static const NoInterceptor OnClientToServerMessage;
+ static const NoInterceptor OnServerToClientMessage;
+
+ // FIXME(ctiller): Add this hook to the L1 filter API
+ void OnClientToServerMessagesClosed() {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ if (tracer == nullptr) return;
+ // TODO(roth): Change CallTracer API to not pass metadata
+ // batch to this method, since the batch is always empty.
+ grpc_metadata_batch metadata(GetContext());
+ tracer->RecordSendTrailingMetadata(&metadata);
+ }
+
+ void OnServerTrailingMetadata(ServerMetadata& metadata) {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ auto* call_tracker =
+ GetContext();
+ absl::Status status;
+ if (tracer != nullptr ||
+ (call_tracker != nullptr && *call_tracker != nullptr)) {
+ grpc_status_code code = metadata.get(GrpcStatusMetadata())
+ .value_or(GRPC_STATUS_UNKNOWN);
+ if (code != GRPC_STATUS_OK) {
+ absl::string_view message;
+ if (const auto* grpc_message =
+ metadata.get_pointer(GrpcMessageMetadata())) {
+ message = grpc_message->as_string_view();
+ }
+ status =
+ absl::Status(static_cast(code), message);
+ }
+ }
+ if (tracer != nullptr) {
+ tracer->RecordReceivedTrailingMetadata(
+ status, &metadata,
+ &GetContext()->call_stats()->transport_stream_stats);
+ }
+ if (call_tracker != nullptr && *call_tracker != nullptr) {
+ LbMetadata lb_metadata(&metadata);
+ BackendMetricAccessor backend_metric_accessor(&metadata);
+ LoadBalancingPolicy::SubchannelCallTrackerInterface::FinishArgs args = {
+ peer_string_.as_string_view(), status, &lb_metadata,
+ &backend_metric_accessor};
+ (*call_tracker)->Finish(args);
+ delete *call_tracker;
+ }
+ }
+
+ void OnFinalize(const grpc_call_final_info*) {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ if (tracer == nullptr) return;
+ gpr_timespec latency =
+ gpr_cycle_counter_sub(gpr_get_cycle_counter(), lb_call_start_time_);
+ tracer->RecordEnd(latency);
+ }
+
+ private:
+ // Interface for accessing backend metric data in the LB call tracker.
+ class BackendMetricAccessor
+ : public LoadBalancingPolicy::BackendMetricAccessor {
+ public:
+ explicit BackendMetricAccessor(
+ grpc_metadata_batch* server_trailing_metadata)
+ : server_trailing_metadata_(server_trailing_metadata) {}
+
+ ~BackendMetricAccessor() override {
+ if (backend_metric_data_ != nullptr) {
+ backend_metric_data_->BackendMetricData::~BackendMetricData();
+ }
+ }
+
+ const BackendMetricData* GetBackendMetricData() override {
+ if (backend_metric_data_ == nullptr) {
+ if (const auto* md = server_trailing_metadata_->get_pointer(
+ EndpointLoadMetricsBinMetadata())) {
+ BackendMetricAllocator allocator;
+ backend_metric_data_ =
+ ParseBackendMetricData(md->as_string_view(), &allocator);
+ }
+ }
+ return backend_metric_data_;
+ }
+
+ private:
+ class BackendMetricAllocator : public BackendMetricAllocatorInterface {
+ public:
+ BackendMetricData* AllocateBackendMetricData() override {
+ return GetContext()->New();
+ }
+
+ char* AllocateString(size_t size) override {
+ return static_cast(GetContext()->Alloc(size));
+ }
+ };
+
+ grpc_metadata_batch* server_trailing_metadata_;
+ const BackendMetricData* backend_metric_data_ = nullptr;
+ };
+
+// FIXME: this isn't the right place to measure this from -- should be
+// doing it from before we do the LB pick
+ gpr_cycle_counter lb_call_start_time_ = gpr_get_cycle_counter();
+ Slice peer_string_;
+ };
+};
+
+const NoInterceptor LbCallTracingFilter::Call::OnClientToServerMessage;
+const NoInterceptor LbCallTracingFilter::Call::OnServerToClientMessage;
+
+} // namespace
+
+class ClientChannel::LoadBalancedCallDestination : public CallDestination {
+ public:
+ explicit LoadBalancedCallDestination(
+ RefCountedPtr client_channel)
+ : client_channel_(std::move(client_channel)) {}
+
+ void Orphan() override {}
+
+ void StartCall(UnstartedCallHandler unstarted_handler) override {
+ // If there is a call tracer, create a call attempt tracer.
+ bool* is_transparent_retry_metadata =
+ unstarted_handler.UnprocessedClientInitialMetadata()->get_pointer(
+ IsTransparentRetry());
+ bool is_transparent_retry =
+ is_transparent_retry_metadata != nullptr
+ ? *is_transparent_retry_metadata
+ : false;
+ MaybeCreateCallAttemptTracer(is_transparent_retry);
+ // Spawn a promise to do the LB pick.
+ // This will eventually start the call.
+ unstarted_handler.SpawnGuarded(
+ "lb_pick",
+ [client_channel = client_channel_, was_queued = true,
+ unstarted_handler = std::move(unstarted_handler)]() mutable {
+ return Map(
+ // Wait for the LB picker.
+ Loop([last_picker =
+ RefCountedPtr(),
+ client_channel = std::move(client_channel),
+ unstarted_handler, &was_queued]() mutable {
+ return Map(
+ client_channel->picker_.Next(last_picker),
+ [client_channel, unstarted_handler, &last_picker,
+ &was_queued](
+ RefCountedPtr
+ picker) mutable {
+ last_picker = std::move(picker);
+ // Returns 3 possible things:
+ // - Continue to queue the pick
+ // - non-OK status to fail the pick
+ // - a connected subchannel to complete the pick
+ auto result = client_channel->PickSubchannel(
+ *last_picker, unstarted_handler);
+ if (absl::holds_alternative(result)) {
+ was_queued = true;
+ }
+ return result;
+ });
+ }),
+ // Create call stack on the connected subchannel.
+ [unstarted_handler = std::move(unstarted_handler),
+ &was_queued](
+ absl::StatusOr>
+ connected_subchannel) {
+ if (!connected_subchannel.ok()) {
+ return connected_subchannel.status();
+ }
+ // LB pick is done, so indicate that we've committed.
+ auto* on_commit = GetContext();
+ if (on_commit != nullptr && *on_commit != nullptr) {
+ (*on_commit)();
+ }
+ // If it was queued, add a trace annotation.
+ if (was_queued) {
+ auto* tracer = GetCallAttemptTracerFromContext();
+ if (tracer != nullptr) {
+ tracer->RecordAnnotation("Delayed LB pick complete.");
+ }
+ }
+ // Delegate to connected subchannel.
+// FIXME: need to insert LbCallTracingFilter at the top of the stack
+ (*connected_subchannel)->StartCall(
+ std::move(unstarted_handler));
+ return absl::OkStatus();
+ });
+ });
+ }
+
+ private:
+ RefCountedPtr client_channel_;
+};
+
+//
+// NoRetryCallDestination
+//
+
+namespace {
+
+ClientChannelServiceConfigCallData* GetServiceConfigCallDataFromContext() {
+ auto* legacy_context = GetContext();
+ return static_cast(
+ legacy_context[GRPC_CONTEXT_SERVICE_CONFIG_CALL_DATA].value);
+}
+
+// A call destination that does not support retries.
+// To be used as an L2 filter.
+class NoRetryCallDestination : public DelegatingCallDestination {
+ public:
+ NoRetryCallDestination(RefCountedPtr next,
+ RefCountedPtr filter_stack,
+ const ChannelArgs& channel_args)
+ : DelegatingCallDestination(std::move(next)),
+ filter_stack_(std::move(filter_stack)),
+ call_size_estimator_(1024),
+ allocator_(channel_args.GetObject()
+ ->memory_quota()
+ ->CreateMemoryOwner()) {}
+
+ void Orphan() override {}
+
+ void StartCall(UnstartedCallHandler unstarted_handler) override {
+ // Start the parent call. We take ownership of the handler.
+ CallHandler handler = unstarted_handler.StartCall(filter_stack_);
+ // Start a promise to drain the client initial metadata from the
+ // parent call, create a new child call, and forward between them.
+ handler.SpawnGuarded(
+ "drain_send_initial_metadata",
+ [self = RefAsSubclass(), handler]() mutable {
+ return Map(
+ handler.PullClientInitialMetadata(),
+ [self = std::move(self), handler](
+ ValueOrFailure client_initial_metadata)
+ mutable -> StatusFlag {
+ if (!client_initial_metadata.ok()) return Failure{};
+ // Indicate that this is not a transparent retry.
+ *(*client_initial_metadata)->GetOrCreatePointer(
+ IsTransparentRetry()) =
+ false;
+ // Set on_commit callback in context.
+ handler.SetContext(
+ []() { GetServiceConfigCallDataFromContext()->Commit(); });
+ // Create an arena for the child call.
+ const size_t initial_size =
+ self->call_size_estimator_.CallSizeEstimate();
+// FIXME: do we want to do this for LB calls, or do we want a separate stat for this?
+ //global_stats().IncrementCallInitialSize(initial_size);
+ Arena* arena = Arena::Create(initial_size, &self->allocator_);
+ // Create an initiator/unstarted-handler pair using the arena.
+// FIXME: pass in a callback that the CallSpine will use to destroy the arena:
+// [](Arena* arena) {
+// call_size_estimator_.UpdateCallSizeEstimate(arena->TotalUsedBytes());
+// arena->Destroy();
+// }
+ auto child_call = MakeCall(std::move(*client_initial_metadata),
+ GetContext(), arena);
+ // Pass the child call's unstarted handler to the next
+ // destination.
+ self->wrapped_destination()->StartCall(
+ std::move(child_call.unstarted_handler));
+ // Forward everything from the parent call to the child call.
+ ForwardCall(std::move(handler),
+ std::move(child_call.initiator));
+ return Success{};
+ });
+ });
+ }
+
+ private:
+ RefCountedPtr filter_stack_;
+ CallSizeEstimator call_size_estimator_;
+ MemoryAllocator allocator_;
+};
+
+} // namespace
+
+//
+// ClientChannel implementation
+//
+
+namespace {
+
+RefCountedPtr GetSubchannelPool(
+ const ChannelArgs& args) {
+ if (args.GetBool(GRPC_ARG_USE_LOCAL_SUBCHANNEL_POOL).value_or(false)) {
+ return MakeRefCounted();
+ }
+ return GlobalSubchannelPool::instance();
+}
+
+} // namespace
+
+absl::StatusOr> ClientChannel::Create(
+ std::string target, ChannelArgs channel_args,
+ grpc_channel_stack_type channel_stack_type) {
+ GPR_ASSERT(channel_stack_type == GRPC_CLIENT_CHANNEL);
+ // Get URI to resolve, using proxy mapper if needed.
+ if (target.empty()) {
+ return absl::InternalError("target URI is empty in client channel");
+ }
+ std::string uri_to_resolve = CoreConfiguration::Get()
+ .proxy_mapper_registry()
+ .MapName(target, &channel_args)
+ .value_or(target);
+ // Make sure the URI to resolve is valid, so that we know that
+ // resolver creation will succeed later.
+ if (!CoreConfiguration::Get().resolver_registry().IsValidTarget(
+ uri_to_resolve)) {
+ return absl::InvalidArgumentError(
+ absl::StrCat("invalid target URI: ", uri_to_resolve));
+ }
+ // Get default service config. If none is specified via the client API,
+ // we use an empty config.
+ absl::optional service_config_json =
+ channel_args.GetString(GRPC_ARG_SERVICE_CONFIG);
+ if (!service_config_json.has_value()) service_config_json = "{}";
+ auto default_service_config =
+ ServiceConfigImpl::Create(channel_args, *service_config_json);
+ if (!default_service_config.ok()) return default_service_config.status();
+ // Strip out service config channel arg, so that it doesn't affect
+ // subchannel uniqueness when the args flow down to that layer.
+ channel_args = channel_args.Remove(GRPC_ARG_SERVICE_CONFIG);
+ // Check client channel factory.
+ auto* client_channel_factory =
+ channel_args.GetObject();
+ if (client_channel_factory == nullptr) {
+ return absl::InternalError(
+ "Missing client channel factory in args for client channel");
+ }
+ // Success. Construct channel.
+ return MakeOrphanable(
+ std::move(target), std::move(channel_args), std::move(uri_to_resolve),
+ std::move(*default_service_config), client_channel_factory);
+}
+
+ClientChannel::ClientChannel(
+ std::string target, ChannelArgs channel_args, std::string uri_to_resolve,
+ RefCountedPtr default_service_config,
+ ClientChannelFactory* client_channel_factory)
+ : Channel(std::move(target), channel_args),
+ channel_args_(std::move(channel_args)),
+ event_engine_(channel_args.GetObjectRef()),
+ uri_to_resolve_(std::move(uri_to_resolve)),
+ service_config_parser_index_(
+ internal::ClientChannelServiceConfigParser::ParserIndex()),
+ default_service_config_(std::move(default_service_config)),
+ client_channel_factory_(client_channel_factory),
+ channelz_node_(channel_args_.GetObject()),
+ interested_parties_(grpc_pollset_set_create()),
+ lb_call_size_estimator_(1024),
+ lb_call_allocator_(channel_args_.GetObject()
+ ->memory_quota()
+ ->CreateMemoryOwner()),
+ idle_timeout_(GetClientIdleTimeout(channel_args_)),
+ resolver_data_for_calls_(ResolverDataForCalls{}),
+ picker_(nullptr),
+ work_serializer_(std::make_shared(event_engine_)),
+ state_tracker_("client_channel", GRPC_CHANNEL_IDLE),
+ subchannel_pool_(GetSubchannelPool(channel_args_)) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: creating client_channel", this);
+ }
+ // Set initial keepalive time.
+ auto keepalive_arg = channel_args_.GetInt(GRPC_ARG_KEEPALIVE_TIME_MS);
+ if (keepalive_arg.has_value()) {
+ keepalive_time_ = Clamp(*keepalive_arg, 1, INT_MAX);
+ } else {
+ keepalive_time_ = -1; // unset
+ }
+ // Set default authority.
+ absl::optional default_authority =
+ channel_args_.GetOwnedString(GRPC_ARG_DEFAULT_AUTHORITY);
+ if (!default_authority.has_value()) {
+ default_authority_ =
+ CoreConfiguration::Get().resolver_registry().GetDefaultAuthority(
+ target);
+ } else {
+ default_authority_ = std::move(*default_authority);
+ }
+ // Get stats plugins for channel.
+ StatsPlugin::ChannelScope scope(this->target(), default_authority_);
+ stats_plugin_group_ =
+ GlobalStatsPluginRegistry::GetStatsPluginsForChannel(scope);
+}
+
+ClientChannel::~ClientChannel() {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: destroying", this);
+ }
+ grpc_pollset_set_destroy(interested_parties_);
+}
+
+void ClientChannel::Orphan() {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: shutting down", this);
+ }
+ Ref().release();
+ work_serializer_->Run(
+ [this]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+ DestroyResolverAndLbPolicyLocked();
+ Unref();
+ },
+ DEBUG_LOCATION);
+ // IncreaseCallCount() introduces a phony call and prevents the idle
+ // timer from being reset by other threads.
+ idle_state_.IncreaseCallCount();
+ idle_activity_.Reset();
+}
+
+grpc_connectivity_state ClientChannel::CheckConnectivityState(
+ bool try_to_connect) {
+ // state_tracker_ is guarded by work_serializer_, which we're not
+ // holding here. But the one method of state_tracker_ that *is*
+ // thread-safe to call without external synchronization is the state()
+ // method, so we can disable thread-safety analysis for this one read.
+ grpc_connectivity_state state =
+ ABSL_TS_UNCHECKED_READ(state_tracker_).state();
+ if (state == GRPC_CHANNEL_IDLE && try_to_connect) {
+ RefAsSubclass().release(); // Held by callback.
+ work_serializer_->Run(
+ [this]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+ TryToConnectLocked();
+ Unref();
+ },
+ DEBUG_LOCATION);
+ }
+ return state;
+}
+
+void ClientChannel::WatchConnectivityState(
+ grpc_connectivity_state last_observed_state, Timestamp deadline,
+ grpc_completion_queue* cq, void* tag) {
+// FIXME: implement
+}
+
+void ClientChannel::AddConnectivityWatcher(
+ grpc_connectivity_state initial_state,
+ OrphanablePtr watcher) {
+// FIXME: to make this work, need to change WorkSerializer to use
+// absl::AnyInvocable<> instead of std::function<>
+// work_serializer_->Run(
+// [self = RefAsSubclass(), initial_state,
+// watcher = std::move(watcher)]()
+// ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+// self->state_tracker_.AddWatcher(initial_state, std::move(watcher));
+// },
+// DEBUG_LOCATION);
+}
+
+void ClientChannel::RemoveConnectivityWatcher(
+ AsyncConnectivityStateWatcherInterface* watcher) {
+ RefAsSubclass().release(); // Held by callback.
+ work_serializer_->Run(
+ [this, watcher]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+ state_tracker_.RemoveWatcher(watcher);
+ Unref();
+ },
+ DEBUG_LOCATION);
+}
+
+void ClientChannel::GetInfo(const grpc_channel_info* info) {
+ MutexLock lock(&info_mu_);
+ if (info->lb_policy_name != nullptr) {
+ *info->lb_policy_name = gpr_strdup(info_lb_policy_name_.c_str());
+ }
+ if (info->service_config_json != nullptr) {
+ *info->service_config_json = gpr_strdup(info_service_config_json_.c_str());
+ }
+}
+
+void ClientChannel::ResetConnectionBackoff() {
+ RefAsSubclass().release(); // Held by callback.
+ work_serializer_->Run(
+ [this]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+ if (lb_policy_ != nullptr) lb_policy_->ResetBackoffLocked();
+ Unref();
+ },
+ DEBUG_LOCATION);
+}
+
+namespace {
+
+// TODO(roth): Remove this in favor of the gprpp Match() function once
+// we can do that without breaking lock annotations.
+template
+T HandlePickResult(
+ LoadBalancingPolicy::PickResult* result,
+ std::function complete_func,
+ std::function queue_func,
+ std::function fail_func,
+ std::function drop_func) {
+ auto* complete_pick =
+ absl::get_if(&result->result);
+ if (complete_pick != nullptr) {
+ return complete_func(complete_pick);
+ }
+ auto* queue_pick =
+ absl::get_if(&result->result);
+ if (queue_pick != nullptr) {
+ return queue_func(queue_pick);
+ }
+ auto* fail_pick =
+ absl::get_if(&result->result);
+ if (fail_pick != nullptr) {
+ return fail_func(fail_pick);
+ }
+ auto* drop_pick =
+ absl::get_if(&result->result);
+ GPR_ASSERT(drop_pick != nullptr);
+ return drop_func(drop_pick);
+}
+
+// A class to handle CQ completion for a ping.
+class PingRequest {
+ public:
+ PingRequest(grpc_completion_queue* cq, void* tag) : cq_(cq), tag_(tag) {
+ grpc_cq_begin_op(cq, tag);
+ }
+
+ // Triggers CQ completion and eventually deletes the PingRequest object.
+ void Complete(grpc_error_handle error) {
+ grpc_cq_end_op(cq_, tag_, error, Destroy, this, &completion_storage_);
+ }
+
+ private:
+ static void Destroy(void* arg, grpc_cq_completion* /*storage*/) {
+ delete static_cast(arg);
+ }
+
+ grpc_completion_queue* cq_;
+ void* tag_;
+ grpc_cq_completion completion_storage_;
+};
+
+} // namespace
+
+void ClientChannel::Ping(grpc_completion_queue* cq, void* tag) {
+ auto* request = new PingRequest(cq, tag);
+ // Get picker.
+ auto picker = NowOrNever(picker_.NextWhen(
+ [](const RefCountedPtr& picker) {
+ return true;
+ }));
+ if (!picker.has_value() || *picker == nullptr) {
+ request->Complete(absl::UnavailableError("channel not connected"));
+ return;
+ }
+ // Do pick.
+ LoadBalancingPolicy::PickResult result =
+ (*picker)->Pick(LoadBalancingPolicy::PickArgs());
+ HandlePickResult(
+ &result,
+ // Complete pick.
+ [&](LoadBalancingPolicy::PickResult::Complete* complete_pick) {
+ SubchannelWrapper* subchannel = static_cast(
+ complete_pick->subchannel.get());
+ RefCountedPtr connected_subchannel =
+ subchannel->connected_subchannel();
+ if (connected_subchannel == nullptr) {
+ request->Complete(
+ absl::UnavailableError("LB pick for ping not connected"));
+ return;
+ }
+ connected_subchannel->Ping([request](absl::Status status) {
+ request->Complete(std::move(status));
+ });
+ },
+ // Queue pick.
+ [&](LoadBalancingPolicy::PickResult::Queue* /*queue_pick*/) {
+ request->Complete(absl::UnavailableError("LB picker queued call"));
+ },
+ // Fail pick.
+ [&](LoadBalancingPolicy::PickResult::Fail* fail_pick) {
+ request->Complete(fail_pick->status);
+ },
+ // Drop pick.
+ [&](LoadBalancingPolicy::PickResult::Drop* drop_pick) {
+ request->Complete(drop_pick->status);
+ });
+}
+
+grpc_call* ClientChannel::CreateCall(
+ grpc_call* parent_call, uint32_t propagation_mask,
+ grpc_completion_queue* cq, grpc_pollset_set* /*pollset_set_alternative*/,
+ Slice path, absl::optional authority, Timestamp deadline,
+ bool registered_method) {
+// FIXME: code to convert from C-core batch API to v3 call, then invoke
+// CreateCall(client_initial_metadata, arena)
+// FIXME: make sure call holds a ref to ClientChannel for its entire lifetime
+ return nullptr;
+}
+
+CallInitiator ClientChannel::CreateCall(
+ ClientMetadataHandle client_initial_metadata, Arena* arena) {
+ // Increment call count.
+ if (idle_timeout_ != Duration::Zero()) idle_state_.IncreaseCallCount();
+ // Exit IDLE if needed.
+ CheckConnectivityState(/*try_to_connect=*/true);
+ // Create an initiator/unstarted-handler pair.
+ auto call = MakeCall(std::move(client_initial_metadata),
+ GetContext(), arena);
+ // Spawn a promise to wait for the resolver result.
+ // This will eventually start the call.
+ call.initiator.SpawnGuarded(
+ "wait-for-name-resolution",
+ [self = RefAsSubclass(),
+ unstarted_handler = std::move(call.unstarted_handler),
+ was_queued = false]() mutable {
+ const bool wait_for_ready =
+ unstarted_handler.UnprocessedClientInitialMetadata()
+ ->GetOrCreatePointer(WaitForReady())
+ ->value;
+ return Map(
+ // Wait for the resolver result.
+ self->resolver_data_for_calls_.NextWhen(
+ [wait_for_ready, &was_queued](
+ const absl::StatusOr result) {
+ bool got_result = false;
+ // If the resolver reports an error but the call is
+ // wait_for_ready, keep waiting for the next result
+ // instead of failing the call.
+ if (!result.ok()) {
+ got_result = !wait_for_ready;
+ } else {
+ // Not an error. Make sure we actually have a result.
+ got_result = result->config_selector != nullptr;
+ }
+ if (!got_result) was_queued = true;
+ return got_result;
+ }),
+ // Handle resolver result.
+ [self, &was_queued, &unstarted_handler](
+ absl::StatusOr resolver_data)
+ mutable {
+ if (!resolver_data.ok()) return resolver_data.status();
+ // Apply service config to call.
+ absl::Status status = self->ApplyServiceConfigToCall(
+ *resolver_data->config_selector,
+ unstarted_handler.UnprocessedClientInitialMetadata());
+ if (!status.ok()) return status;
+ // If the call was queued, add trace annotation.
+ if (was_queued) {
+ auto* call_tracer = GetCallTracerFromContext();
+ if (call_tracer != nullptr) {
+ call_tracer->RecordAnnotation(
+ "Delayed name resolution complete.");
+ }
+ }
+ // Start the call on the destination provided by the
+ // resolver.
+ resolver_data->call_destination->StartCall(
+ std::move(unstarted_handler));
+ return absl::OkStatus();
+ });
+ });
+ // Return the initiator.
+ return call.initiator;
+}
+
+void ClientChannel::CreateResolverLocked() {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: starting name resolution for %s",
+ this, uri_to_resolve_.c_str());
+ }
+ resolver_ = CoreConfiguration::Get().resolver_registry().CreateResolver(
+ uri_to_resolve_, channel_args_,
+ interested_parties_, // FIXME: remove somehow
+ work_serializer_,
+ std::make_unique(
+ RefAsSubclass()));
+ // Since the validity of the args was checked when the channel was created,
+ // CreateResolver() must return a non-null result.
+ GPR_ASSERT(resolver_ != nullptr);
+ UpdateStateLocked(GRPC_CHANNEL_CONNECTING, absl::Status(),
+ "started resolving");
+ resolver_->StartLocked();
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: created resolver=%p", this,
+ resolver_.get());
+ }
+}
+
+void ClientChannel::DestroyResolverAndLbPolicyLocked() {
+ if (resolver_ != nullptr) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: shutting down resolver=%p", this,
+ resolver_.get());
+ }
+ resolver_.reset();
+ saved_service_config_.reset();
+ saved_config_selector_.reset();
+ resolver_data_for_calls_.Set(ResolverDataForCalls{nullptr, nullptr});
+ // Clear LB policy if set.
+ if (lb_policy_ != nullptr) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: shutting down lb_policy=%p",
+ this, lb_policy_.get());
+ }
+ lb_policy_.reset();
+ picker_.Set(nullptr);
+ }
+ }
+}
+
+void ClientChannel::TryToConnectLocked() {
+ if (disconnect_error_.ok()) {
+ if (lb_policy_ != nullptr) {
+ lb_policy_->ExitIdleLocked();
+ } else if (resolver_ == nullptr) {
+ CreateResolverLocked();
+ }
+ }
+}
+
+namespace {
+
+RefCountedPtr ChooseLbPolicy(
+ const Resolver::Result& resolver_result,
+ const internal::ClientChannelGlobalParsedConfig* parsed_service_config) {
+ // Prefer the LB policy config found in the service config.
+ if (parsed_service_config->parsed_lb_config() != nullptr) {
+ return parsed_service_config->parsed_lb_config();
+ }
+ // Try the deprecated LB policy name from the service config.
+ // If not, try the setting from channel args.
+ absl::optional policy_name;
+ if (!parsed_service_config->parsed_deprecated_lb_policy().empty()) {
+ policy_name = parsed_service_config->parsed_deprecated_lb_policy();
+ } else {
+ policy_name = resolver_result.args.GetString(GRPC_ARG_LB_POLICY_NAME);
+ bool requires_config = false;
+ if (policy_name.has_value() &&
+ (!CoreConfiguration::Get()
+ .lb_policy_registry()
+ .LoadBalancingPolicyExists(*policy_name, &requires_config) ||
+ requires_config)) {
+ if (requires_config) {
+ gpr_log(GPR_ERROR,
+ "LB policy: %s passed through channel_args must not "
+ "require a config. Using pick_first instead.",
+ std::string(*policy_name).c_str());
+ } else {
+ gpr_log(GPR_ERROR,
+ "LB policy: %s passed through channel_args does not exist. "
+ "Using pick_first instead.",
+ std::string(*policy_name).c_str());
+ }
+ policy_name = "pick_first";
+ }
+ }
+ // Use pick_first if nothing was specified and we didn't select grpclb
+ // above.
+ if (!policy_name.has_value()) policy_name = "pick_first";
+ // Now that we have the policy name, construct an empty config for it.
+ Json config_json = Json::FromArray({Json::FromObject({
+ {std::string(*policy_name), Json::FromObject({})},
+ })});
+ auto lb_policy_config =
+ CoreConfiguration::Get().lb_policy_registry().ParseLoadBalancingConfig(
+ config_json);
+ // The policy name came from one of three places:
+ // - The deprecated loadBalancingPolicy field in the service config,
+ // in which case the code in ClientChannelServiceConfigParser
+ // already verified that the policy does not require a config.
+ // - One of the hard-coded values here, all of which are known to not
+ // require a config.
+ // - A channel arg, in which case we check that the specified policy exists
+ // and accepts an empty config. If not, we revert to using pick_first
+ // lb_policy
+ GPR_ASSERT(lb_policy_config.ok());
+ return std::move(*lb_policy_config);
+}
+
+} // namespace
+
+void ClientChannel::OnResolverResultChangedLocked(
+ Resolver::Result result) {
+ // Handle race conditions.
+ if (resolver_ == nullptr) return;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: got resolver result", this);
+ }
+ // Grab resolver result health callback.
+ auto resolver_callback = std::move(result.result_health_callback);
+ absl::Status resolver_result_status;
+ // We only want to trace the address resolution in the follow cases:
+ // (a) Address resolution resulted in service config change.
+ // (b) Address resolution that causes number of backends to go from
+ // zero to non-zero.
+ // (c) Address resolution that causes number of backends to go from
+ // non-zero to zero.
+ // (d) Address resolution that causes a new LB policy to be created.
+ //
+ // We track a list of strings to eventually be concatenated and traced.
+ std::vector trace_strings;
+ const bool resolution_contains_addresses =
+ result.addresses.ok() && !result.addresses->empty();
+ if (!resolution_contains_addresses &&
+ previous_resolution_contained_addresses_) {
+ trace_strings.push_back("Address list became empty");
+ } else if (resolution_contains_addresses &&
+ !previous_resolution_contained_addresses_) {
+ trace_strings.push_back("Address list became non-empty");
+ }
+ previous_resolution_contained_addresses_ = resolution_contains_addresses;
+ std::string service_config_error_string_storage;
+ if (!result.service_config.ok()) {
+ service_config_error_string_storage =
+ result.service_config.status().ToString();
+ trace_strings.push_back(service_config_error_string_storage.c_str());
+ }
+ // Choose the service config.
+ RefCountedPtr service_config;
+ RefCountedPtr config_selector;
+ if (!result.service_config.ok()) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: resolver returned service config error: %s",
+ this, result.service_config.status().ToString().c_str());
+ }
+ // If the service config was invalid, then fallback to the
+ // previously returned service config, if any.
+ if (saved_service_config_ != nullptr) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: resolver returned invalid service config; "
+ "continuing to use previous service config",
+ this);
+ }
+ service_config = saved_service_config_;
+ config_selector = saved_config_selector_;
+ } else {
+ // We received a service config error and we don't have a
+ // previous service config to fall back to. Put the channel into
+ // TRANSIENT_FAILURE.
+ OnResolverErrorLocked(result.service_config.status());
+ trace_strings.push_back("no valid service config");
+ resolver_result_status =
+ absl::UnavailableError("no valid service config");
+ }
+ } else if (*result.service_config == nullptr) {
+ // Resolver did not return any service config.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: resolver returned no service config; "
+ "using default service config for channel",
+ this);
+ }
+ service_config = default_service_config_;
+ } else {
+ // Use ServiceConfig and ConfigSelector returned by resolver.
+ service_config = std::move(*result.service_config);
+ config_selector = result.args.GetObjectRef();
+ }
+ // Note: The only case in which service_config is null here is if the
+ // resolver returned a service config error and we don't have a previous
+ // service config to fall back to.
+ if (service_config != nullptr) {
+ // Extract global config for client channel.
+ const internal::ClientChannelGlobalParsedConfig* parsed_service_config =
+ static_cast(
+ service_config->GetGlobalParsedConfig(
+ service_config_parser_index_));
+ // Choose LB policy config.
+ RefCountedPtr lb_policy_config =
+ ChooseLbPolicy(result, parsed_service_config);
+ // Check if the ServiceConfig has changed.
+ const bool service_config_changed =
+ saved_service_config_ == nullptr ||
+ service_config->json_string() != saved_service_config_->json_string();
+ // Check if the ConfigSelector has changed.
+ const bool config_selector_changed = !ConfigSelector::Equals(
+ saved_config_selector_.get(), config_selector.get());
+ // If either has changed, apply the global parameters now.
+ if (service_config_changed || config_selector_changed) {
+ // Update service config in control plane.
+ UpdateServiceConfigInControlPlaneLocked(
+ std::move(service_config), std::move(config_selector),
+ std::string(lb_policy_config->name()));
+ // TODO(ncteisen): might be worth somehow including a snippet of the
+ // config in the trace, at the risk of bloating the trace logs.
+ trace_strings.push_back("Service config changed");
+ } else if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: service config not changed", this);
+ }
+ // Create or update LB policy, as needed.
+ resolver_result_status = CreateOrUpdateLbPolicyLocked(
+ std::move(lb_policy_config),
+ parsed_service_config->health_check_service_name(), std::move(result));
+ // Start using new service config for calls.
+ // This needs to happen after the LB policy has been updated, since
+ // the ConfigSelector may need the LB policy to know about new
+ // destinations before it can send RPCs to those destinations.
+ if (service_config_changed || config_selector_changed) {
+ UpdateServiceConfigInDataPlaneLocked();
+ }
+ }
+ // Invoke resolver callback if needed.
+ if (resolver_callback != nullptr) {
+ resolver_callback(std::move(resolver_result_status));
+ }
+ // Add channel trace event.
+ if (!trace_strings.empty()) {
+ std::string message =
+ absl::StrCat("Resolution event: ", absl::StrJoin(trace_strings, ", "));
+ if (channelz_node_ != nullptr) {
+ channelz_node_->AddTraceEvent(channelz::ChannelTrace::Severity::Info,
+ grpc_slice_from_cpp_string(message));
+ }
+ }
+}
+
+void ClientChannel::OnResolverErrorLocked(absl::Status status) {
+ if (resolver_ == nullptr) return;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: resolver transient failure: %s", this,
+ status.ToString().c_str());
+ }
+ // If we already have an LB policy from a previous resolution
+ // result, then we continue to let it set the connectivity state.
+ // Otherwise, we go into TRANSIENT_FAILURE.
+ if (lb_policy_ == nullptr) {
+ // Update connectivity state.
+ UpdateStateLocked(GRPC_CHANNEL_TRANSIENT_FAILURE, status,
+ "resolver failure");
+ // Send updated resolver result.
+ resolver_data_for_calls_.Set(
+ MaybeRewriteIllegalStatusCode(status, "resolver"));
+ }
+}
+
+absl::Status ClientChannel::CreateOrUpdateLbPolicyLocked(
+ RefCountedPtr lb_policy_config,
+ const absl::optional& health_check_service_name,
+ Resolver::Result result) {
+ // Construct update.
+ LoadBalancingPolicy::UpdateArgs update_args;
+ if (!result.addresses.ok()) {
+ update_args.addresses = result.addresses.status();
+ } else {
+ update_args.addresses = std::make_shared(
+ std::move(*result.addresses));
+ }
+ update_args.config = std::move(lb_policy_config);
+ update_args.resolution_note = std::move(result.resolution_note);
+ // Remove the config selector from channel args so that we're not holding
+ // unnecessary refs that cause it to be destroyed somewhere other than in the
+ // WorkSerializer.
+ update_args.args = result.args.Remove(GRPC_ARG_CONFIG_SELECTOR);
+ // Add health check service name to channel args.
+ if (health_check_service_name.has_value()) {
+ update_args.args = update_args.args.Set(GRPC_ARG_HEALTH_CHECK_SERVICE_NAME,
+ *health_check_service_name);
+ }
+ // Create policy if needed.
+ if (lb_policy_ == nullptr) {
+ lb_policy_ = CreateLbPolicyLocked(update_args.args);
+ }
+ // Update the policy.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: Updating child policy %p", this,
+ lb_policy_.get());
+ }
+ return lb_policy_->UpdateLocked(std::move(update_args));
+}
+
+// Creates a new LB policy.
+OrphanablePtr ClientChannel::CreateLbPolicyLocked(
+ const ChannelArgs& args) {
+ // The LB policy will start in state CONNECTING but will not
+ // necessarily send us an update synchronously, so set state to
+ // CONNECTING (in case the resolver had previously failed and put the
+ // channel into TRANSIENT_FAILURE) and make sure we have a queueing picker.
+ UpdateStateAndPickerLocked(
+ GRPC_CHANNEL_CONNECTING, absl::Status(), "started resolving",
+ MakeRefCounted(nullptr));
+ // Now create the LB policy.
+ LoadBalancingPolicy::Args lb_policy_args;
+ lb_policy_args.work_serializer = work_serializer_;
+ lb_policy_args.channel_control_helper =
+ std::make_unique(
+ RefAsSubclass());
+ lb_policy_args.args = args;
+ OrphanablePtr lb_policy =
+ MakeOrphanable(std::move(lb_policy_args),
+ &grpc_client_channel_trace);
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: created new LB policy %p", this,
+ lb_policy.get());
+ }
+ return lb_policy;
+}
+
+void ClientChannel::UpdateServiceConfigInControlPlaneLocked(
+ RefCountedPtr service_config,
+ RefCountedPtr config_selector, std::string lb_policy_name) {
+ std::string service_config_json(service_config->json_string());
+ // Update service config.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: using service config: \"%s\"", this,
+ service_config_json.c_str());
+ }
+ saved_service_config_ = std::move(service_config);
+ // Update config selector.
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: using ConfigSelector %p", this,
+ config_selector.get());
+ }
+ saved_config_selector_ = std::move(config_selector);
+ // Update the data used by GetChannelInfo().
+ {
+ MutexLock lock(&info_mu_);
+ info_lb_policy_name_ = std::move(lb_policy_name);
+ info_service_config_json_ = std::move(service_config_json);
+ }
+}
+
+void ClientChannel::UpdateServiceConfigInDataPlaneLocked() {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: switching to ConfigSelector %p", this,
+ saved_config_selector_.get());
+ }
+ // Use default config selector if resolver didn't supply one.
+ RefCountedPtr config_selector = saved_config_selector_;
+ if (config_selector == nullptr) {
+ config_selector =
+ MakeRefCounted(saved_service_config_);
+ }
+ // Construct filter stack.
+ CallFilters::StackBuilder builder;
+ if (idle_timeout_ != Duration::Zero()) {
+ builder.AddOnServerTrailingMetadata(
+ [this](ServerMetadata&) {
+ if (idle_state_.DecreaseCallCount()) StartIdleTimer();
+ });
+ }
+// FIXME: add filters registered for CLIENT_CHANNEL plus filters returned
+// by config selector
+#if 0
+ std::vector filters =
+ config_selector->GetFilters();
+ ChannelArgs new_args =
+ channel_args_.SetObject(this).SetObject(service_config);
+ RefCountedPtr dynamic_filters =
+ DynamicFilters::Create(new_args, std::move(filters));
+ GPR_ASSERT(dynamic_filters != nullptr);
+#endif
+ auto filter_stack = builder.Build();
+ // Create call destination.
+ RefCountedPtr call_destination;
+ const bool enable_retries =
+ !channel_args_.WantMinimalStack() &&
+ channel_args_.GetBool(GRPC_ARG_ENABLE_RETRIES).value_or(true);
+ if (enable_retries) {
+ Crash("call v3 stack does not yet support retries");
+ } else {
+ call_destination = MakeRefCounted(
+ MakeRefCounted(
+ RefAsSubclass()),
+ std::move(filter_stack), channel_args_);
+ }
+ // Send result to data plane.
+ resolver_data_for_calls_.Set(
+ ResolverDataForCalls{std::move(config_selector),
+ std::move(call_destination)});
+}
+
+void ClientChannel::UpdateStateLocked(grpc_connectivity_state state,
+ const absl::Status& status,
+ const char* reason) {
+ if (state != GRPC_CHANNEL_SHUTDOWN &&
+ state_tracker_.state() == GRPC_CHANNEL_SHUTDOWN) {
+ Crash("Illegal transition SHUTDOWN -> anything");
+ }
+ state_tracker_.SetState(state, status, reason);
+ if (channelz_node_ != nullptr) {
+ channelz_node_->SetConnectivityState(state);
+ channelz_node_->AddTraceEvent(
+ channelz::ChannelTrace::Severity::Info,
+ grpc_slice_from_static_string(
+ channelz::ChannelNode::GetChannelConnectivityStateChangeString(
+ state)));
+ }
+}
+
+void ClientChannel::UpdateStateAndPickerLocked(
+ grpc_connectivity_state state, const absl::Status& status,
+ const char* reason,
+ RefCountedPtr picker) {
+ UpdateStateLocked(state, status, reason);
+ picker_.Set(std::move(picker));
+}
+
+void ClientChannel::StartIdleTimer() {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: idle timer started", this);
+ }
+ auto self = RefAsSubclass();
+ auto promise = Loop([self]() {
+ return TrySeq(Sleep(Timestamp::Now() + self->idle_timeout_),
+ [&self]() -> Poll> {
+ if (self->idle_state_.CheckTimer()) {
+ return Continue{};
+ } else {
+ return absl::OkStatus();
+ }
+ });
+ });
+ idle_activity_.Set(MakeActivity(
+ std::move(promise), ExecCtxWakeupScheduler{},
+ [this, self = std::move(self)](absl::Status status) mutable {
+ if (status.ok()) {
+ work_serializer_->Run(
+ [this, self = std::move(self)]()
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_) {
+ DestroyResolverAndLbPolicyLocked();
+ UpdateStateAndPickerLocked(
+ GRPC_CHANNEL_IDLE, absl::OkStatus(),
+ "channel entering IDLE", nullptr);
+ // TODO(roth): In case there's a race condition, we
+ // might need to check for any calls that are queued
+ // waiting for a resolver result or an LB pick.
+ },
+ DEBUG_LOCATION);
+ }
+ },
+ GetContext()));
+}
+
+absl::Status ClientChannel::ApplyServiceConfigToCall(
+ ConfigSelector& config_selector,
+ ClientMetadataHandle& client_initial_metadata) const {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_call_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: %sapplying service config to call",
+ this, GetContext()->DebugTag().c_str());
+ }
+ // Create a ClientChannelServiceConfigCallData for the call. This stores
+ // a ref to the ServiceConfig and caches the right set of parsed configs
+ // to use for the call. The ClientChannelServiceConfigCallData will store
+ // itself in the call context, so that it can be accessed by filters
+ // below us in the stack, and it will be cleaned up when the call ends.
+ auto* service_config_call_data =
+ GetContext()->New(
+ GetContext(), GetContext());
+ // Use the ConfigSelector to determine the config for the call.
+ absl::Status call_config_status = config_selector.GetCallConfig(
+ {client_initial_metadata.get(), GetContext(),
+ service_config_call_data});
+ if (!call_config_status.ok()) {
+ return MaybeRewriteIllegalStatusCode(call_config_status, "ConfigSelector");
+ }
+ // Apply our own method params to the call.
+ auto* method_params = static_cast(
+ service_config_call_data->GetMethodParsedConfig(
+ service_config_parser_index_));
+ if (method_params != nullptr) {
+ // If the service config specifies a deadline, update the call's
+ // deadline timer.
+ if (method_params->timeout() != Duration::Zero()) {
+ CallContext* call_context = GetContext();
+ const Timestamp per_method_deadline =
+ Timestamp::FromCycleCounterRoundUp(call_context->call_start_time()) +
+ method_params->timeout();
+ call_context->UpdateDeadline(per_method_deadline);
+ }
+ // If the service config set wait_for_ready and the application
+ // did not explicitly set it, use the value from the service config.
+ auto* wait_for_ready =
+ client_initial_metadata->GetOrCreatePointer(WaitForReady());
+ if (method_params->wait_for_ready().has_value() &&
+ !wait_for_ready->explicitly_set) {
+ wait_for_ready->value = method_params->wait_for_ready().value();
+ }
+ }
+ return absl::OkStatus();
+}
+
+namespace {
+
+class LbCallState : public ClientChannelLbCallState {
+ public:
+ void* Alloc(size_t size) override { return GetContext()->Alloc(size); }
+
+ // Internal API to allow first-party LB policies to access per-call
+ // attributes set by the ConfigSelector.
+ ServiceConfigCallData::CallAttributeInterface* GetCallAttribute(
+ UniqueTypeName type) const override {
+ auto* service_config_call_data = GetServiceConfigCallDataFromContext();
+ return service_config_call_data->GetCallAttribute(type);
+ }
+
+ ClientCallTracer::CallAttemptTracer* GetCallAttemptTracer() const override {
+ auto* legacy_context = GetContext();
+ return static_cast(
+ legacy_context[GRPC_CONTEXT_CALL_TRACER].value);
+ }
+};
+
+} // namespace
+
+LoopCtl>>
+ClientChannel::PickSubchannel(LoadBalancingPolicy::SubchannelPicker& picker,
+ UnstartedCallHandler& unstarted_handler) {
+ // Perform LB pick.
+ auto& client_initial_metadata =
+ unstarted_handler.UnprocessedClientInitialMetadata();
+ LoadBalancingPolicy::PickArgs pick_args;
+ Slice* path = client_initial_metadata->get_pointer(HttpPathMetadata());
+ GPR_ASSERT(path != nullptr);
+ pick_args.path = path->as_string_view();
+ LbCallState lb_call_state;
+ pick_args.call_state = &lb_call_state;
+ LbMetadata initial_metadata(client_initial_metadata.get());
+ pick_args.initial_metadata = &initial_metadata;
+ auto result = picker.Pick(pick_args);
+ // Handle result.
+ return HandlePickResult<
+ LoopCtl>>>(
+ &result,
+ // CompletePick
+ [&](LoadBalancingPolicy::PickResult::Complete* complete_pick)
+ -> LoopCtl>> {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_lb_call_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: %sLB pick succeeded: subchannel=%p",
+ this, GetContext()->DebugTag().c_str(),
+ complete_pick->subchannel.get());
+ }
+ GPR_ASSERT(complete_pick->subchannel != nullptr);
+ // Grab a ref to the connected subchannel while we're still
+ // holding the data plane mutex.
+ SubchannelWrapper* subchannel =
+ static_cast(complete_pick->subchannel.get());
+ auto connected_subchannel = subchannel->connected_subchannel();
+ // If the subchannel has no connected subchannel (e.g., if the
+ // subchannel has moved out of state READY but the LB policy hasn't
+ // yet seen that change and given us a new picker), then just
+ // queue the pick. We'll try again as soon as we get a new picker.
+ if (connected_subchannel == nullptr) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_lb_call_trace)) {
+ gpr_log(GPR_INFO,
+ "client_channel=%p: %ssubchannel returned by LB picker "
+ "has no connected subchannel; queueing pick",
+ this, GetContext()->DebugTag().c_str());
+ }
+ return Continue{};
+ }
+ // If the LB policy returned a call tracker, inform it that the
+ // call is starting and add it to context, so that we can notify
+ // it when the call finishes.
+ if (complete_pick->subchannel_call_tracker != nullptr) {
+ complete_pick->subchannel_call_tracker->Start();
+ unstarted_handler.SetContext(
+ complete_pick->subchannel_call_tracker.release());
+ }
+ // Return the connected subchannel.
+ return connected_subchannel;
+ },
+ // QueuePick
+ [&](LoadBalancingPolicy::PickResult::Queue* /*queue_pick*/) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_lb_call_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: %sLB pick queued",
+ this, GetContext()->DebugTag().c_str());
+ }
+ return Continue{};
+ },
+ // FailPick
+ [&](LoadBalancingPolicy::PickResult::Fail* fail_pick)
+ -> LoopCtl>> {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_lb_call_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: %sLB pick failed: %s",
+ this, GetContext()->DebugTag().c_str(),
+ fail_pick->status.ToString().c_str());
+ }
+ // If wait_for_ready is false, then the error indicates the RPC
+ // attempt's final status.
+ if (!unstarted_handler.UnprocessedClientInitialMetadata()
+ ->GetOrCreatePointer(WaitForReady())
+ ->value) {
+ return MaybeRewriteIllegalStatusCode(std::move(fail_pick->status),
+ "LB pick");
+ }
+ // If wait_for_ready is true, then queue to retry when we get a new
+ // picker.
+ return Continue{};
+ },
+ // DropPick
+ [&](LoadBalancingPolicy::PickResult::Drop* drop_pick)
+ -> LoopCtl>> {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_client_channel_lb_call_trace)) {
+ gpr_log(GPR_INFO, "client_channel=%p: %sLB pick dropped: %s",
+ this, GetContext()->DebugTag().c_str(),
+ drop_pick->status.ToString().c_str());
+ }
+ return grpc_error_set_int(
+ MaybeRewriteIllegalStatusCode(std::move(drop_pick->status),
+ "LB drop"),
+ StatusIntProperty::kLbPolicyDrop, 1);
+ });
+}
+
+} // namespace grpc_core
diff --git a/src/core/client_channel/client_channel.h b/src/core/client_channel/client_channel.h
new file mode 100644
index 00000000000..2b5cd79f5fd
--- /dev/null
+++ b/src/core/client_channel/client_channel.h
@@ -0,0 +1,249 @@
+//
+// Copyright 2015 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef GRPC_SRC_CORE_CLIENT_CHANNEL_CLIENT_CHANNEL_H
+#define GRPC_SRC_CORE_CLIENT_CHANNEL_CLIENT_CHANNEL_H
+
+#include
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "absl/strings/string_view.h"
+
+#include "src/core/client_channel/config_selector.h"
+#include "src/core/client_channel/client_channel_factory.h"
+#include "src/core/client_channel/subchannel.h"
+#include "src/core/ext/filters/channel_idle/idle_filter_state.h"
+#include "src/core/lib/gprpp/single_set_ptr.h"
+#include "src/core/lib/promise/loop.h"
+#include "src/core/lib/promise/observable.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/transport/call_filters.h"
+#include "src/core/lib/transport/metadata.h"
+#include "src/core/load_balancing/lb_policy.h"
+#include "src/core/resolver/resolver.h"
+#include "src/core/service_config/service_config.h"
+
+namespace grpc_core {
+
+class ClientChannel : public Channel {
+ public:
+ static absl::StatusOr> Create(
+ std::string target, ChannelArgs channel_args,
+ grpc_channel_stack_type channel_stack_type);
+
+ // Do not instantiate directly -- use Create() instead.
+ ClientChannel(std::string target_uri, ChannelArgs args,
+ std::string uri_to_resolve,
+ RefCountedPtr default_service_config,
+ ClientChannelFactory* client_channel_factory);
+
+ ~ClientChannel() override;
+
+ void Orphan() override;
+
+ grpc_call* CreateCall(grpc_call* parent_call, uint32_t propagation_mask,
+ grpc_completion_queue* cq,
+ grpc_pollset_set* /*pollset_set_alternative*/,
+ Slice path, absl::optional authority,
+ Timestamp deadline, bool registered_method) override;
+
+ grpc_event_engine::experimental::EventEngine* event_engine()
+ const override {
+ return event_engine_.get();
+ }
+
+// FIXME: should we support lame channels somehow?
+ bool IsLame() const override { return false; }
+
+ bool SupportsConnectivityWatcher() const override { return true; }
+
+ // Returns the current connectivity state. If try_to_connect is true,
+ // triggers a connection attempt if not already connected.
+ grpc_connectivity_state CheckConnectivityState(bool try_to_connect) override;
+
+ void WatchConnectivityState(
+ grpc_connectivity_state last_observed_state, Timestamp deadline,
+ grpc_completion_queue* cq, void* tag) override;
+
+ // Starts and stops a connectivity watch. The watcher will be initially
+ // notified as soon as the state changes from initial_state and then on
+ // every subsequent state change until either the watch is stopped or
+ // it is notified that the state has changed to SHUTDOWN.
+ //
+ // This is intended to be used when starting watches from code inside of
+ // C-core (e.g., for a nested control plane channel for things like xds).
+ void AddConnectivityWatcher(
+ grpc_connectivity_state initial_state,
+ OrphanablePtr watcher) override;
+ void RemoveConnectivityWatcher(
+ AsyncConnectivityStateWatcherInterface* watcher) override;
+
+ void GetInfo(const grpc_channel_info* channel_info) override;
+
+ void ResetConnectionBackoff() override;
+
+ void Ping(grpc_completion_queue* cq, void* tag) override;
+
+ // Flag that this object gets stored in channel args as a raw pointer.
+ struct RawPointerChannelArgTag {};
+ static absl::string_view ChannelArgName() {
+ return "grpc.internal.client_channel";
+ }
+
+ private:
+ class ResolverResultHandler;
+ class ClientChannelControlHelper;
+ class SubchannelWrapper;
+ class LoadBalancedCallDestination;
+
+ void CreateResolverLocked() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+ void DestroyResolverAndLbPolicyLocked()
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void TryToConnectLocked() ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void OnResolverResultChangedLocked(Resolver::Result result)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+ void OnResolverErrorLocked(absl::Status status)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ absl::Status CreateOrUpdateLbPolicyLocked(
+ RefCountedPtr lb_policy_config,
+ const absl::optional& health_check_service_name,
+ Resolver::Result result) ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+ OrphanablePtr CreateLbPolicyLocked(
+ const ChannelArgs& args) ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void UpdateServiceConfigInControlPlaneLocked(
+ RefCountedPtr service_config,
+ RefCountedPtr config_selector, std::string lb_policy_name)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void UpdateServiceConfigInDataPlaneLocked()
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void UpdateStateLocked(grpc_connectivity_state state,
+ const absl::Status& status, const char* reason)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void UpdateStateAndPickerLocked(
+ grpc_connectivity_state state, const absl::Status& status,
+ const char* reason,
+ RefCountedPtr picker)
+ ABSL_EXCLUSIVE_LOCKS_REQUIRED(*work_serializer_);
+
+ void StartIdleTimer();
+
+ CallInitiator CreateCall(ClientMetadataHandle client_initial_metadata,
+ Arena* arena);
+
+ // Applies service config settings from config_selector to the call.
+ // May modify call context and client_initial_metadata.
+ absl::Status ApplyServiceConfigToCall(
+ ConfigSelector& config_selector,
+ ClientMetadataHandle& client_initial_metadata) const;
+
+ // Does an LB pick for a call. Returns one of the following things:
+ // - Continue{}, meaning to queue the pick
+ // - a non-OK status, meaning to fail the call
+ // - a connected subchannel, meaning that the pick is complete
+ // When the pick is complete, pushes client_initial_metadata onto
+ // call_initiator. Also adds the subchannel call tracker (if any) to
+ // context.
+ LoopCtl>> PickSubchannel(
+ LoadBalancingPolicy::SubchannelPicker& picker,
+ UnstartedCallHandler& unstarted_handler);
+
+ //
+ // Fields set at construction and never modified.
+ //
+ ChannelArgs channel_args_;
+ std::shared_ptr event_engine_;
+ std::string uri_to_resolve_;
+ const size_t service_config_parser_index_;
+ RefCountedPtr default_service_config_;
+ ClientChannelFactory* client_channel_factory_;
+ std::string default_authority_;
+ channelz::ChannelNode* channelz_node_;
+ GlobalStatsPluginRegistry::StatsPluginGroup stats_plugin_group_;
+ grpc_pollset_set* interested_parties_;
+
+ //
+ // State for LB calls.
+ //
+ CallSizeEstimator lb_call_size_estimator_;
+ MemoryAllocator lb_call_allocator_;
+
+ //
+ // Idleness state.
+ //
+ const Duration idle_timeout_;
+ IdleFilterState idle_state_{false};
+ SingleSetPtr idle_activity_;
+
+ //
+ // Fields related to name resolution.
+ //
+ struct ResolverDataForCalls {
+ RefCountedPtr config_selector;
+ RefCountedPtr call_destination;
+ };
+ Observable> resolver_data_for_calls_;
+
+ //
+ // Fields related to LB picks.
+ //
+ Observable> picker_;
+
+ //
+ // Fields used in the control plane. Guarded by work_serializer.
+ //
+ std::shared_ptr work_serializer_;
+ ConnectivityStateTracker state_tracker_ ABSL_GUARDED_BY(*work_serializer_);
+ OrphanablePtr resolver_ ABSL_GUARDED_BY(*work_serializer_);
+ bool previous_resolution_contained_addresses_
+ ABSL_GUARDED_BY(*work_serializer_) = false;
+ RefCountedPtr saved_service_config_
+ ABSL_GUARDED_BY(*work_serializer_);
+ RefCountedPtr saved_config_selector_
+ ABSL_GUARDED_BY(*work_serializer_);
+ OrphanablePtr lb_policy_
+ ABSL_GUARDED_BY(*work_serializer_);
+ RefCountedPtr subchannel_pool_
+ ABSL_GUARDED_BY(*work_serializer_);
+ // The number of SubchannelWrapper instances referencing a given Subchannel.
+ std::map subchannel_refcount_map_
+ ABSL_GUARDED_BY(*work_serializer_);
+ // The set of SubchannelWrappers that currently exist.
+ // No need to hold a ref, since the set is updated in the control-plane
+ // work_serializer when the SubchannelWrappers are created and destroyed.
+ absl::flat_hash_set subchannel_wrappers_
+ ABSL_GUARDED_BY(*work_serializer_);
+ int keepalive_time_ ABSL_GUARDED_BY(*work_serializer_) = -1;
+ absl::Status disconnect_error_ ABSL_GUARDED_BY(*work_serializer_);
+
+ //
+ // Fields accessed via GetChannelInfo().
+ //
+ Mutex info_mu_;
+ std::string info_lb_policy_name_ ABSL_GUARDED_BY(info_mu_);
+ std::string info_service_config_json_ ABSL_GUARDED_BY(info_mu_);
+};
+
+} // namespace grpc_core
+
+#endif // GRPC_SRC_CORE_CLIENT_CHANNEL_CLIENT_CHANNEL_H
diff --git a/src/core/client_channel/client_channel_filter.cc b/src/core/client_channel/client_channel_filter.cc
index 1ffcfb5e4ca..cf73a023b74 100644
--- a/src/core/client_channel/client_channel_filter.cc
+++ b/src/core/client_channel/client_channel_filter.cc
@@ -1109,7 +1109,7 @@ class ClientChannelFilter::ClientChannelControlHelper final
const ChannelArgs& args) override
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*chand_->work_serializer_) {
if (chand_->resolver_ == nullptr) return nullptr; // Shutting down.
- ChannelArgs subchannel_args = ClientChannelFilter::MakeSubchannelArgs(
+ ChannelArgs subchannel_args = Subchannel::MakeSubchannelArgs(
args, per_address_args, chand_->subchannel_pool_,
chand_->default_authority_);
// Create subchannel.
@@ -1359,31 +1359,6 @@ ClientChannelFilter::CreateLoadBalancedCallPromise(
return call_ptr->MakeCallPromise(std::move(call_args), std::move(lb_call));
}
-ChannelArgs ClientChannelFilter::MakeSubchannelArgs(
- const ChannelArgs& channel_args, const ChannelArgs& address_args,
- const RefCountedPtr& subchannel_pool,
- const std::string& channel_default_authority) {
- // Note that we start with the channel-level args and then apply the
- // per-address args, so that if a value is present in both, the one
- // in the channel-level args is used. This is particularly important
- // for the GRPC_ARG_DEFAULT_AUTHORITY arg, which we want to allow
- // resolvers to set on a per-address basis only if the application
- // did not explicitly set it at the channel level.
- return channel_args.UnionWith(address_args)
- .SetObject(subchannel_pool)
- // If we haven't already set the default authority arg (i.e., it
- // was not explicitly set by the application nor overridden by
- // the resolver), add it from the channel's default.
- .SetIfUnset(GRPC_ARG_DEFAULT_AUTHORITY, channel_default_authority)
- // Remove channel args that should not affect subchannel
- // uniqueness.
- .Remove(GRPC_ARG_HEALTH_CHECK_SERVICE_NAME)
- .Remove(GRPC_ARG_INHIBIT_HEALTH_CHECKING)
- .Remove(GRPC_ARG_CHANNELZ_CHANNEL_NODE)
- // Remove all keys with the no-subchannel prefix.
- .RemoveAllKeysWithPrefix(GRPC_ARG_NO_SUBCHANNEL_PREFIX);
-}
-
void ClientChannelFilter::ReprocessQueuedResolverCalls() {
for (CallData* calld : resolver_queued_calls_) {
calld->RemoveCallFromResolverQueuedCallsLocked();
diff --git a/src/core/client_channel/client_channel_filter.h b/src/core/client_channel/client_channel_filter.h
index 28c21d3280c..ac144f52527 100644
--- a/src/core/client_channel/client_channel_filter.h
+++ b/src/core/client_channel/client_channel_filter.h
@@ -86,9 +86,6 @@
// Channel arg key for server URI string.
#define GRPC_ARG_SERVER_URI "grpc.server_uri"
-// Channel arg containing a pointer to the ClientChannelFilter object.
-#define GRPC_ARG_CLIENT_CHANNEL "grpc.internal.client_channel_filter"
-
// Max number of batches that can be pending on a call at any given
// time. This includes one batch for each of the following ops:
// recv_initial_metadata
@@ -112,7 +109,9 @@ class ClientChannelFilter final {
// Flag that this object gets stored in channel args as a raw pointer.
struct RawPointerChannelArgTag {};
- static absl::string_view ChannelArgName() { return GRPC_ARG_CLIENT_CHANNEL; }
+ static absl::string_view ChannelArgName() {
+ return "grpc.internal.client_channel_filter";
+ }
static ArenaPromise MakeCallPromise(
grpc_channel_element* elem, CallArgs call_args,
@@ -166,12 +165,6 @@ class ClientChannelFilter final {
CallArgs call_args, absl::AnyInvocable on_commit,
bool is_transparent_retry);
- // Exposed for testing only.
- static ChannelArgs MakeSubchannelArgs(
- const ChannelArgs& channel_args, const ChannelArgs& address_args,
- const RefCountedPtr& subchannel_pool,
- const std::string& channel_default_authority);
-
private:
class CallData;
class FilterBasedCallData;
diff --git a/src/core/client_channel/subchannel.cc b/src/core/client_channel/subchannel.cc
index e8ef1f5e861..bd52949a6ea 100644
--- a/src/core/client_channel/subchannel.cc
+++ b/src/core/client_channel/subchannel.cc
@@ -38,8 +38,12 @@
#include
#include
+<<<<<<< HEAD
#include "src/core/channelz/channel_trace.h"
#include "src/core/channelz/channelz.h"
+=======
+#include "src/core/client_channel/client_channel_internal.h"
+>>>>>>> 513bd21ea9db49d061e0382289319ddb126f812c
#include "src/core/client_channel/subchannel_pool_interface.h"
#include "src/core/handshaker/proxy_mapper_registry.h"
#include "src/core/lib/address_utils/sockaddr_utils.h"
@@ -51,6 +55,7 @@
#include "src/core/lib/debug/stats.h"
#include "src/core/lib/debug/stats_data.h"
#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/experiments/experiments.h"
#include "src/core/lib/gpr/alloc.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/debug_location.h"
@@ -96,52 +101,31 @@ DebugOnlyTraceFlag grpc_trace_subchannel_refcount(false, "subchannel_refcount");
//
ConnectedSubchannel::ConnectedSubchannel(
- grpc_channel_stack* channel_stack, const ChannelArgs& args,
+ const ChannelArgs& args,
RefCountedPtr channelz_subchannel)
: RefCounted(
GRPC_TRACE_FLAG_ENABLED(grpc_trace_subchannel_refcount)
? "ConnectedSubchannel"
: nullptr),
- channel_stack_(channel_stack),
args_(args),
channelz_subchannel_(std::move(channelz_subchannel)) {}
-ConnectedSubchannel::~ConnectedSubchannel() {
- GRPC_CHANNEL_STACK_UNREF(channel_stack_, "connected_subchannel_dtor");
-}
-
-void ConnectedSubchannel::StartWatch(
- grpc_pollset_set* interested_parties,
- OrphanablePtr watcher) {
- grpc_transport_op* op = grpc_make_transport_op(nullptr);
- op->start_connectivity_watch = std::move(watcher);
- op->start_connectivity_watch_state = GRPC_CHANNEL_READY;
- op->bind_pollset_set = interested_parties;
- grpc_channel_element* elem = grpc_channel_stack_element(channel_stack_, 0);
- elem->filter->start_transport_op(elem, op);
-}
-
-void ConnectedSubchannel::Ping(grpc_closure* on_initiate,
- grpc_closure* on_ack) {
- grpc_transport_op* op = grpc_make_transport_op(nullptr);
- grpc_channel_element* elem;
- op->send_ping.on_initiate = on_initiate;
- op->send_ping.on_ack = on_ack;
- elem = grpc_channel_stack_element(channel_stack_, 0);
- elem->filter->start_transport_op(elem, op);
-}
+//
+// LegacyConnectedSubchannel
+//
-size_t ConnectedSubchannel::GetInitialCallSizeEstimate() const {
- return GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(SubchannelCall)) +
- channel_stack_->call_stack_size;
-}
+class LegacyConnectedSubchannel : public ConnectedSubchannel {
+ public:
+ LegacyConnectedSubchannel(
+ RefCountedPtr channel_stack, const ChannelArgs& args,
+ RefCountedPtr channelz_subchannel)
+ : ConnectedSubchannel(args, std::move(channelz_subchannel)),
+ channel_stack_(std::move(channel_stack)) {}
-ArenaPromise ConnectedSubchannel::MakeCallPromise(
- CallArgs call_args) {
- // If not using channelz, we just need to call the channel stack.
- if (channelz_subchannel() == nullptr) {
- return channel_stack_->MakeClientCallPromise(std::move(call_args));
+ ~LegacyConnectedSubchannel() override {
+ channel_stack_.reset(DEBUG_LOCATION, "ConnectedSubchannel");
}
+<<<<<<< HEAD
// Otherwise, we need to wrap the channel stack promise with code that
// handles the channelz updates.
return OnCancel(
@@ -165,6 +149,127 @@ ArenaPromise ConnectedSubchannel::MakeCallPromise(
channelz_subchannel->RecordCallFailed();
});
}
+=======
+
+ void StartWatch(
+ grpc_pollset_set* interested_parties,
+ OrphanablePtr watcher) override {
+ grpc_transport_op* op = grpc_make_transport_op(nullptr);
+ op->start_connectivity_watch = std::move(watcher);
+ op->start_connectivity_watch_state = GRPC_CHANNEL_READY;
+ op->bind_pollset_set = interested_parties;
+ grpc_channel_element* elem =
+ grpc_channel_stack_element(channel_stack_.get(), 0);
+ elem->filter->start_transport_op(elem, op);
+ }
+
+ void Ping(absl::AnyInvocable on_ack) override {
+ Crash("call v3 ping method called in legacy impl");
+ }
+
+ void StartCall(UnstartedCallHandler) override {
+ Crash("call v3 StartCall() method called in legacy impl");
+ }
+
+ grpc_channel_stack* channel_stack() const override {
+ return channel_stack_.get();
+ }
+
+ size_t GetInitialCallSizeEstimate() const override {
+ return GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(SubchannelCall)) +
+ channel_stack_->call_stack_size;
+ }
+
+ ArenaPromise MakeCallPromise(
+ CallArgs call_args) override {
+ // If not using channelz, we just need to call the channel stack.
+ if (channelz_subchannel() == nullptr) {
+ return channel_stack_->MakeClientCallPromise(std::move(call_args));
+ }
+ // Otherwise, we need to wrap the channel stack promise with code that
+ // handles the channelz updates.
+ return OnCancel(
+ Seq(channel_stack_->MakeClientCallPromise(std::move(call_args)),
+ [self = Ref()](ServerMetadataHandle metadata) {
+ channelz::SubchannelNode* channelz_subchannel =
+ self->channelz_subchannel();
+ GPR_ASSERT(channelz_subchannel != nullptr);
+ if (metadata->get(GrpcStatusMetadata())
+ .value_or(GRPC_STATUS_UNKNOWN) != GRPC_STATUS_OK) {
+ channelz_subchannel->RecordCallFailed();
+ } else {
+ channelz_subchannel->RecordCallSucceeded();
+ }
+ return metadata;
+ }),
+ [self = Ref()]() {
+ channelz::SubchannelNode* channelz_subchannel =
+ self->channelz_subchannel();
+ GPR_ASSERT(channelz_subchannel != nullptr);
+ channelz_subchannel->RecordCallFailed();
+ });
+ }
+
+ void Ping(grpc_closure* on_initiate, grpc_closure* on_ack) override {
+ grpc_transport_op* op = grpc_make_transport_op(nullptr);
+ op->send_ping.on_initiate = on_initiate;
+ op->send_ping.on_ack = on_ack;
+ grpc_channel_element* elem =
+ grpc_channel_stack_element(channel_stack_.get(), 0);
+ elem->filter->start_transport_op(elem, op);
+ }
+
+ private:
+ RefCountedPtr channel_stack_;
+};
+
+//
+// NewConnectedSubchannel
+//
+
+class NewConnectedSubchannel : public ConnectedSubchannel {
+ public:
+ NewConnectedSubchannel(
+ RefCountedPtr filter_stack,
+ OrphanablePtr transport, const ChannelArgs& args,
+ RefCountedPtr channelz_subchannel)
+ : ConnectedSubchannel(args, std::move(channelz_subchannel)),
+ filter_stack_(std::move(filter_stack)),
+ transport_(std::move(transport)) {}
+
+ void StartWatch(
+ grpc_pollset_set* interested_parties,
+ OrphanablePtr watcher) override {
+// FIXME: add new transport API for this in v3 stack
+ }
+
+ void Ping(absl::AnyInvocable on_ack) override {
+// FIXME: add new transport API for this in v3 stack
+ }
+
+ void StartCall(UnstartedCallHandler unstarted_handler) override {
+ auto handler = unstarted_handler.StartCall(filter_stack_);
+ transport_->client_transport()->StartCall(std::move(handler));
+ }
+
+ grpc_channel_stack* channel_stack() const override { return nullptr; }
+
+ size_t GetInitialCallSizeEstimate() const override { return 0; }
+
+ ArenaPromise MakeCallPromise(
+ CallArgs call_args) override {
+ Crash("legacy MakeCallPromise() method called in call v3 impl");
+ }
+
+ void Ping(grpc_closure* on_initiate, grpc_closure* on_ack) override {
+ Crash("legacy ping method called in call v3 impl");
+ }
+
+ private:
+ RefCountedPtr filter_stack_;
+ OrphanablePtr transport_;
+};
+>>>>>>> 513bd21ea9db49d061e0382289319ddb126f812c
//
// SubchannelCall
@@ -769,37 +874,46 @@ void Subchannel::OnConnectingFinishedLocked(grpc_error_handle error) {
}
bool Subchannel::PublishTransportLocked() {
- // Construct channel stack.
- // Builder takes ownership of transport.
- ChannelStackBuilderImpl builder(
- "subchannel", GRPC_CLIENT_SUBCHANNEL,
- connecting_result_.channel_args.SetObject(
- std::exchange(connecting_result_.transport, nullptr)));
- if (!CoreConfiguration::Get().channel_init().CreateStack(&builder)) {
- return false;
- }
- absl::StatusOr> stk = builder.Build();
- if (!stk.ok()) {
- auto error = absl_status_to_grpc_error(stk.status());
- connecting_result_.Reset();
- gpr_log(GPR_ERROR,
- "subchannel %p %s: error initializing subchannel stack: %s", this,
- key_.ToString().c_str(), StatusToString(error).c_str());
- return false;
+ auto socket_node = std::move(connecting_result_.socket_node);
+ if (!IsCallV3Enabled()) {
+ // Construct channel stack.
+ // Builder takes ownership of transport.
+ ChannelStackBuilderImpl builder(
+ "subchannel", GRPC_CLIENT_SUBCHANNEL,
+ connecting_result_.channel_args.SetObject(
+ std::exchange(connecting_result_.transport, nullptr)));
+ if (!CoreConfiguration::Get().channel_init().CreateStack(&builder)) {
+ return false;
+ }
+ absl::StatusOr> stack = builder.Build();
+ if (!stack.ok()) {
+ connecting_result_.Reset();
+ gpr_log(GPR_ERROR,
+ "subchannel %p %s: error initializing subchannel stack: %s", this,
+ key_.ToString().c_str(), stack.status().ToString().c_str());
+ return false;
+ }
+ connected_subchannel_ = MakeRefCounted(
+ std::move(*stack), args_, channelz_node_);
+ } else {
+ // Call v3 stack.
+ CallFilters::StackBuilder builder;
+// FIXME: add filters registered for CLIENT_SUBCHANNEL
+ auto filter_stack = builder.Build();
+ connected_subchannel_ = MakeRefCounted(
+ std::move(filter_stack),
+ OrphanablePtr(
+ std::exchange(connecting_result_.transport, nullptr)),
+ args_, channelz_node_);
}
- RefCountedPtr socket =
- std::move(connecting_result_.socket_node);
connecting_result_.Reset();
- if (shutdown_) return false;
// Publish.
- connected_subchannel_.reset(
- new ConnectedSubchannel(stk->release(), args_, channelz_node_));
if (GRPC_TRACE_FLAG_ENABLED(grpc_trace_subchannel)) {
gpr_log(GPR_INFO, "subchannel %p %s: new connected subchannel at %p", this,
key_.ToString().c_str(), connected_subchannel_.get());
}
if (channelz_node_ != nullptr) {
- channelz_node_->SetChildSocket(std::move(socket));
+ channelz_node_->SetChildSocket(std::move(socket_node));
}
// Start watching connected subchannel.
connected_subchannel_->StartWatch(
@@ -810,4 +924,29 @@ bool Subchannel::PublishTransportLocked() {
return true;
}
+ChannelArgs Subchannel::MakeSubchannelArgs(
+ const ChannelArgs& channel_args, const ChannelArgs& address_args,
+ const RefCountedPtr& subchannel_pool,
+ const std::string& channel_default_authority) {
+ // Note that we start with the channel-level args and then apply the
+ // per-address args, so that if a value is present in both, the one
+ // in the channel-level args is used. This is particularly important
+ // for the GRPC_ARG_DEFAULT_AUTHORITY arg, which we want to allow
+ // resolvers to set on a per-address basis only if the application
+ // did not explicitly set it at the channel level.
+ return channel_args.UnionWith(address_args)
+ .SetObject(subchannel_pool)
+ // If we haven't already set the default authority arg (i.e., it
+ // was not explicitly set by the application nor overridden by
+ // the resolver), add it from the channel's default.
+ .SetIfUnset(GRPC_ARG_DEFAULT_AUTHORITY, channel_default_authority)
+ // Remove channel args that should not affect subchannel
+ // uniqueness.
+ .Remove(GRPC_ARG_HEALTH_CHECK_SERVICE_NAME)
+ .Remove(GRPC_ARG_INHIBIT_HEALTH_CHECKING)
+ .Remove(GRPC_ARG_CHANNELZ_CHANNEL_NODE)
+ // Remove all keys with the no-subchannel prefix.
+ .RemoveAllKeysWithPrefix(GRPC_ARG_NO_SUBCHANNEL_PREFIX);
+}
+
} // namespace grpc_core
diff --git a/src/core/client_channel/subchannel.h b/src/core/client_channel/subchannel.h
index 6fbe389da5c..35247d3af2f 100644
--- a/src/core/client_channel/subchannel.h
+++ b/src/core/client_channel/subchannel.h
@@ -66,28 +66,32 @@ class SubchannelCall;
class ConnectedSubchannel final : public RefCounted {
public:
- ConnectedSubchannel(
- grpc_channel_stack* channel_stack, const ChannelArgs& args,
- RefCountedPtr channelz_subchannel);
- ~ConnectedSubchannel() override;
-
- void StartWatch(grpc_pollset_set* interested_parties,
- OrphanablePtr watcher);
-
- void Ping(grpc_closure* on_initiate, grpc_closure* on_ack);
-
- grpc_channel_stack* channel_stack() const { return channel_stack_; }
const ChannelArgs& args() const { return args_; }
channelz::SubchannelNode* channelz_subchannel() const {
return channelz_subchannel_.get();
}
- size_t GetInitialCallSizeEstimate() const;
+ virtual void StartWatch(
+ grpc_pollset_set* interested_parties,
+ OrphanablePtr watcher) = 0;
- ArenaPromise MakeCallPromise(CallArgs call_args);
+ // Methods for v3 stack.
+ virtual void StartCall(UnstartedCallHandler unstarted_handler) = 0;
+ virtual void Ping(absl::AnyInvocable on_ack) = 0;
+
+ // Methods for legacy stack.
+ virtual grpc_channel_stack* channel_stack() const = 0;
+ virtual size_t GetInitialCallSizeEstimate() const = 0;
+ virtual ArenaPromise MakeCallPromise(
+ CallArgs call_args) = 0;
+ virtual void Ping(grpc_closure* on_initiate, grpc_closure* on_ack) = 0;
+
+ protected:
+ ConnectedSubchannel(
+ const ChannelArgs& args,
+ RefCountedPtr channelz_subchannel);
private:
- grpc_channel_stack* channel_stack_;
ChannelArgs args_;
// ref counted pointer to the channelz node in this connected subchannel's
// owning subchannel.
@@ -272,6 +276,12 @@ class Subchannel final : public DualRefCounted