diff --git a/BUILD b/BUILD
index 7dc5b6ca3988275e23dd01fdd2c3bba2d4f6b82c..ac1db59b444ad56744d4df64c8b6005bc5c1a6ab 100644
--- a/BUILD
+++ b/BUILD
@@ -312,6 +312,7 @@ cc_library(
"src/core/ext/census/census_interface.h",
"src/core/ext/census/census_rpc_stats.h",
"src/core/ext/census/gen/census.pb.h",
+ "src/core/ext/census/gen/trace_context.pb.h",
"src/core/ext/census/grpc_filter.h",
"src/core/ext/census/mlog.h",
"src/core/ext/census/resource.h",
@@ -493,6 +494,7 @@ cc_library(
"src/core/ext/census/base_resources.c",
"src/core/ext/census/context.c",
"src/core/ext/census/gen/census.pb.c",
+ "src/core/ext/census/gen/trace_context.pb.c",
"src/core/ext/census/grpc_context.c",
"src/core/ext/census/grpc_filter.c",
"src/core/ext/census/grpc_plugin.c",
@@ -1037,6 +1039,7 @@ cc_library(
"src/core/ext/census/census_interface.h",
"src/core/ext/census/census_rpc_stats.h",
"src/core/ext/census/gen/census.pb.h",
+ "src/core/ext/census/gen/trace_context.pb.h",
"src/core/ext/census/grpc_filter.h",
"src/core/ext/census/mlog.h",
"src/core/ext/census/resource.h",
@@ -1189,6 +1192,7 @@ cc_library(
"src/core/ext/census/base_resources.c",
"src/core/ext/census/context.c",
"src/core/ext/census/gen/census.pb.c",
+ "src/core/ext/census/gen/trace_context.pb.c",
"src/core/ext/census/grpc_context.c",
"src/core/ext/census/grpc_filter.c",
"src/core/ext/census/grpc_plugin.c",
@@ -2339,6 +2343,7 @@ objc_library(
"src/core/ext/census/base_resources.c",
"src/core/ext/census/context.c",
"src/core/ext/census/gen/census.pb.c",
+ "src/core/ext/census/gen/trace_context.pb.c",
"src/core/ext/census/grpc_context.c",
"src/core/ext/census/grpc_filter.c",
"src/core/ext/census/grpc_plugin.c",
@@ -2532,6 +2537,7 @@ objc_library(
"src/core/ext/census/census_interface.h",
"src/core/ext/census/census_rpc_stats.h",
"src/core/ext/census/gen/census.pb.h",
+ "src/core/ext/census/gen/trace_context.pb.h",
"src/core/ext/census/grpc_filter.h",
"src/core/ext/census/mlog.h",
"src/core/ext/census/resource.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b8194652519028b64b8a33f2a6215db55a32b01f..3e9c44c09ace168519ffe73272e007435809998c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -470,6 +470,7 @@ add_library(grpc
src/core/ext/census/base_resources.c
src/core/ext/census/context.c
src/core/ext/census/gen/census.pb.c
+ src/core/ext/census/gen/trace_context.pb.c
src/core/ext/census/grpc_context.c
src/core/ext/census/grpc_filter.c
src/core/ext/census/grpc_plugin.c
@@ -930,6 +931,7 @@ add_library(grpc_unsecure
src/core/ext/census/base_resources.c
src/core/ext/census/context.c
src/core/ext/census/gen/census.pb.c
+ src/core/ext/census/gen/trace_context.pb.c
src/core/ext/census/grpc_context.c
src/core/ext/census/grpc_filter.c
src/core/ext/census/grpc_plugin.c
diff --git a/Makefile b/Makefile
index 4bd4c306c1741e645df09d33cfb375181aaf54e0..53109b02d4a077c019d0d2f9be09e7eb4416ad39 100644
--- a/Makefile
+++ b/Makefile
@@ -2686,6 +2686,7 @@ LIBGRPC_SRC = \
src/core/ext/census/base_resources.c \
src/core/ext/census/context.c \
src/core/ext/census/gen/census.pb.c \
+ src/core/ext/census/gen/trace_context.pb.c \
src/core/ext/census/grpc_context.c \
src/core/ext/census/grpc_filter.c \
src/core/ext/census/grpc_plugin.c \
@@ -3391,6 +3392,7 @@ LIBGRPC_UNSECURE_SRC = \
src/core/ext/census/base_resources.c \
src/core/ext/census/context.c \
src/core/ext/census/gen/census.pb.c \
+ src/core/ext/census/gen/trace_context.pb.c \
src/core/ext/census/grpc_context.c \
src/core/ext/census/grpc_filter.c \
src/core/ext/census/grpc_plugin.c \
diff --git a/binding.gyp b/binding.gyp
index a29cfda6fc544bfc10ceb2eee8ab27a75bca7fff..666547c09758934cda134971ca6e2b6cf3baddd8 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -742,6 +742,7 @@
'src/core/ext/census/base_resources.c',
'src/core/ext/census/context.c',
'src/core/ext/census/gen/census.pb.c',
+ 'src/core/ext/census/gen/trace_context.pb.c',
'src/core/ext/census/grpc_context.c',
'src/core/ext/census/grpc_filter.c',
'src/core/ext/census/grpc_plugin.c',
diff --git a/build.yaml b/build.yaml
index 9b182d2ffcf57084a4b3c950b2b3e43b35c91076..8599d6b0824b2323d3b7cff1843d488113ea4787 100644
--- a/build.yaml
+++ b/build.yaml
@@ -24,6 +24,7 @@ filegroups:
- src/core/ext/census/census_interface.h
- src/core/ext/census/census_rpc_stats.h
- src/core/ext/census/gen/census.pb.h
+ - src/core/ext/census/gen/trace_context.pb.h
- src/core/ext/census/grpc_filter.h
- src/core/ext/census/mlog.h
- src/core/ext/census/resource.h
@@ -32,6 +33,7 @@ filegroups:
- src/core/ext/census/base_resources.c
- src/core/ext/census/context.c
- src/core/ext/census/gen/census.pb.c
+ - src/core/ext/census/gen/trace_context.pb.c
- src/core/ext/census/grpc_context.c
- src/core/ext/census/grpc_filter.c
- src/core/ext/census/grpc_plugin.c
diff --git a/config.m4 b/config.m4
index 5b47074bcd7a77609e20302499228c9097c36b38..1f6abbb6e2cb2c32da0c6135e1518606ad68d795 100644
--- a/config.m4
+++ b/config.m4
@@ -261,6 +261,7 @@ if test "$PHP_GRPC" != "no"; then
src/core/ext/census/base_resources.c \
src/core/ext/census/context.c \
src/core/ext/census/gen/census.pb.c \
+ src/core/ext/census/gen/trace_context.pb.c \
src/core/ext/census/grpc_context.c \
src/core/ext/census/grpc_filter.c \
src/core/ext/census/grpc_plugin.c \
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 41ba1b1058b67b414244475c29cdcdfba524f1e1..900ea41470694b108718a919c80406ea7a7b1783 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -407,6 +407,7 @@ Pod::Spec.new do |s|
'src/core/ext/census/census_interface.h',
'src/core/ext/census/census_rpc_stats.h',
'src/core/ext/census/gen/census.pb.h',
+ 'src/core/ext/census/gen/trace_context.pb.h',
'src/core/ext/census/grpc_filter.h',
'src/core/ext/census/mlog.h',
'src/core/ext/census/resource.h',
@@ -591,6 +592,7 @@ Pod::Spec.new do |s|
'src/core/ext/census/base_resources.c',
'src/core/ext/census/context.c',
'src/core/ext/census/gen/census.pb.c',
+ 'src/core/ext/census/gen/trace_context.pb.c',
'src/core/ext/census/grpc_context.c',
'src/core/ext/census/grpc_filter.c',
'src/core/ext/census/grpc_plugin.c',
@@ -768,6 +770,7 @@ Pod::Spec.new do |s|
'src/core/ext/census/census_interface.h',
'src/core/ext/census/census_rpc_stats.h',
'src/core/ext/census/gen/census.pb.h',
+ 'src/core/ext/census/gen/trace_context.pb.h',
'src/core/ext/census/grpc_filter.h',
'src/core/ext/census/mlog.h',
'src/core/ext/census/resource.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 95eb28bd1d7e65a9dde24df3fc75fe7a1086d23e..2acde4076c3901bb6a47716530ec122ec6fa590c 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -326,6 +326,7 @@ Gem::Specification.new do |s|
s.files += %w( src/core/ext/census/census_interface.h )
s.files += %w( src/core/ext/census/census_rpc_stats.h )
s.files += %w( src/core/ext/census/gen/census.pb.h )
+ s.files += %w( src/core/ext/census/gen/trace_context.pb.h )
s.files += %w( src/core/ext/census/grpc_filter.h )
s.files += %w( src/core/ext/census/mlog.h )
s.files += %w( src/core/ext/census/resource.h )
@@ -510,6 +511,7 @@ Gem::Specification.new do |s|
s.files += %w( src/core/ext/census/base_resources.c )
s.files += %w( src/core/ext/census/context.c )
s.files += %w( src/core/ext/census/gen/census.pb.c )
+ s.files += %w( src/core/ext/census/gen/trace_context.pb.c )
s.files += %w( src/core/ext/census/grpc_context.c )
s.files += %w( src/core/ext/census/grpc_filter.c )
s.files += %w( src/core/ext/census/grpc_plugin.c )
diff --git a/package.xml b/package.xml
index 1df4940530dc2a346f290470ab028796a7d69fa4..15707352f03a0c522ed356aa29c231df945ac3e3 100644
--- a/package.xml
+++ b/package.xml
@@ -334,6 +334,7 @@
<file baseinstalldir="/" name="src/core/ext/census/census_interface.h" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/census_rpc_stats.h" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/gen/census.pb.h" role="src" />
+ <file baseinstalldir="/" name="src/core/ext/census/gen/trace_context.pb.h" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/grpc_filter.h" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/mlog.h" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/resource.h" role="src" />
@@ -518,6 +519,7 @@
<file baseinstalldir="/" name="src/core/ext/census/base_resources.c" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/context.c" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/gen/census.pb.c" role="src" />
+ <file baseinstalldir="/" name="src/core/ext/census/gen/trace_context.pb.c" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/grpc_context.c" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/grpc_filter.c" role="src" />
<file baseinstalldir="/" name="src/core/ext/census/grpc_plugin.c" role="src" />
diff --git a/src/core/ext/census/gen/README.md b/src/core/ext/census/gen/README.md
index 72bef6542d02e6e12d3980ad7323db303ed09cc7..fdbac1084cd4a234689fc9c875805c8dc5bb6d8c 100644
--- a/src/core/ext/census/gen/README.md
+++ b/src/core/ext/census/gen/README.md
@@ -4,3 +4,7 @@ Files generated for use by Census stats and trace recording subsystem.
* census.pb.{h,c} - Generated from src/core/ext/census/census.proto, using the
script `tools/codegen/core/gen_nano_proto.sh src/proto/census/census.proto
$PWD/src/core/ext/census/gen src/core/ext/census/gen`
+* trace_context.pb.{h,c} - Generated from
+ src/core/ext/census/trace_context.proto, using the script
+ `tools/codegen/core/gen_nano_proto.sh src/proto/census/trace_context.proto
+ $PWD/src/core/ext/census/gen src/core/ext/census/gen`
diff --git a/src/core/ext/census/gen/trace_context.pb.c b/src/core/ext/census/gen/trace_context.pb.c
new file mode 100644
index 0000000000000000000000000000000000000000..c8aea324cee638598ea86380dbcce2d94dd37832
--- /dev/null
+++ b/src/core/ext/census/gen/trace_context.pb.c
@@ -0,0 +1,81 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.3.5-dev */
+
+#include "src/core/ext/census/gen/trace_context.pb.h"
+
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+
+
+const pb_field_t google_trace_TraceId_fields[3] = {
+ PB_FIELD( 1, FIXED64 , OPTIONAL, STATIC , FIRST, google_trace_TraceId, hi, hi, 0),
+ PB_FIELD( 2, FIXED64 , OPTIONAL, STATIC , OTHER, google_trace_TraceId, lo, hi, 0),
+ PB_LAST_FIELD
+};
+
+const pb_field_t google_trace_TraceContext_fields[4] = {
+ PB_FIELD( 1, MESSAGE , OPTIONAL, STATIC , FIRST, google_trace_TraceContext, trace_id, trace_id, &google_trace_TraceId_fields),
+ PB_FIELD( 2, FIXED64 , OPTIONAL, STATIC , OTHER, google_trace_TraceContext, span_id, trace_id, 0),
+ PB_FIELD( 3, BOOL , OPTIONAL, STATIC , OTHER, google_trace_TraceContext, is_sampled, span_id, 0),
+ PB_LAST_FIELD
+};
+
+
+/* Check that field information fits in pb_field_t */
+#if !defined(PB_FIELD_32BIT)
+/* If you get an error here, it means that you need to define PB_FIELD_32BIT
+ * compile-time option. You can do that in pb.h or on compiler command line.
+ *
+ * The reason you need to do this is that some of your messages contain tag
+ * numbers or field sizes that are larger than what can fit in 8 or 16 bit
+ * field descriptors.
+ */
+PB_STATIC_ASSERT((pb_membersize(google_trace_TraceContext, trace_id) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_google_trace_TraceId_google_trace_TraceContext)
+#endif
+
+#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
+/* If you get an error here, it means that you need to define PB_FIELD_16BIT
+ * compile-time option. You can do that in pb.h or on compiler command line.
+ *
+ * The reason you need to do this is that some of your messages contain tag
+ * numbers or field sizes that are larger than what can fit in the default
+ * 8 bit descriptors.
+ */
+PB_STATIC_ASSERT((pb_membersize(google_trace_TraceContext, trace_id) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_google_trace_TraceId_google_trace_TraceContext)
+#endif
+
+
diff --git a/src/core/ext/census/gen/trace_context.pb.h b/src/core/ext/census/gen/trace_context.pb.h
new file mode 100644
index 0000000000000000000000000000000000000000..263c4c58cbfee3006670469c230f04ee53baf360
--- /dev/null
+++ b/src/core/ext/census/gen/trace_context.pb.h
@@ -0,0 +1,99 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.3.5-dev */
+
+#ifndef GRPC_CORE_EXT_CENSUS_GEN_TRACE_CONTEXT_PB_H
+#define GRPC_CORE_EXT_CENSUS_GEN_TRACE_CONTEXT_PB_H
+#include "third_party/nanopb/pb.h"
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Struct definitions */
+typedef struct _google_trace_TraceId {
+ bool has_hi;
+ uint64_t hi;
+ bool has_lo;
+ uint64_t lo;
+} google_trace_TraceId;
+
+typedef struct _google_trace_TraceContext {
+ bool has_trace_id;
+ google_trace_TraceId trace_id;
+ bool has_span_id;
+ uint64_t span_id;
+ bool has_is_sampled;
+ bool is_sampled;
+} google_trace_TraceContext;
+
+/* Default values for struct fields */
+
+/* Initializer values for message structs */
+#define google_trace_TraceId_init_default {false, 0, false, 0}
+#define google_trace_TraceContext_init_default {false, google_trace_TraceId_init_default, false, 0, false, 0}
+#define google_trace_TraceId_init_zero {false, 0, false, 0}
+#define google_trace_TraceContext_init_zero {false, google_trace_TraceId_init_zero, false, 0, false, 0}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define google_trace_TraceId_hi_tag 1
+#define google_trace_TraceId_lo_tag 2
+#define google_trace_TraceContext_trace_id_tag 1
+#define google_trace_TraceContext_span_id_tag 2
+#define google_trace_TraceContext_is_sampled_tag 3
+
+/* Struct field encoding specification for nanopb */
+extern const pb_field_t google_trace_TraceId_fields[3];
+extern const pb_field_t google_trace_TraceContext_fields[4];
+
+/* Maximum encoded size of messages (where known) */
+#define google_trace_TraceId_size 18
+#define google_trace_TraceContext_size 31
+
+/* Message IDs (where set with "msgid" option) */
+#ifdef PB_MSGID
+
+#define TRACE_CONTEXT_MESSAGES \
+
+
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
diff --git a/src/proto/census/trace_context.options b/src/proto/census/trace_context.options
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/src/proto/census/trace_context.proto b/src/proto/census/trace_context.proto
new file mode 100644
index 0000000000000000000000000000000000000000..a5d5a9595db621effdb399c6912fc1e15009c4bb
--- /dev/null
+++ b/src/proto/census/trace_context.proto
@@ -0,0 +1,48 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package google.trace;
+
+// A TraceId uniquely represents a single Trace. It is a 128-bit nonce.
+message TraceId {
+ fixed64 hi = 1;
+ fixed64 lo = 2;
+}
+
+// Tracing information that is propagated with RPC's.
+message TraceContext {
+ // Trace identifer. Must be present.
+ TraceId trace_id = 1;
+ // ID of parent (client) span. Must be present.
+ fixed64 span_id = 2;
+ // true if this trace is sampled.
+ bool is_sampled = 3;
+}
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 660e34d742039272794417dc6c18882706530a80..c3db2f98aeb69033fc87f16ff81fd94e04df5266 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -255,6 +255,7 @@ CORE_SOURCE_FILES = [
'src/core/ext/census/base_resources.c',
'src/core/ext/census/context.c',
'src/core/ext/census/gen/census.pb.c',
+ 'src/core/ext/census/gen/trace_context.pb.c',
'src/core/ext/census/grpc_context.c',
'src/core/ext/census/grpc_filter.c',
'src/core/ext/census/grpc_plugin.c',
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 77f951af50e88c7b5598d874a723840bad03fb57..cc07b930834b5c122485794aba9a42538fe513c8 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -945,6 +945,7 @@ src/core/ext/census/base_resources.h \
src/core/ext/census/census_interface.h \
src/core/ext/census/census_rpc_stats.h \
src/core/ext/census/gen/census.pb.h \
+src/core/ext/census/gen/trace_context.pb.h \
src/core/ext/census/grpc_filter.h \
src/core/ext/census/mlog.h \
src/core/ext/census/resource.h \
@@ -1129,6 +1130,7 @@ src/core/ext/load_reporting/load_reporting_filter.c \
src/core/ext/census/base_resources.c \
src/core/ext/census/context.c \
src/core/ext/census/gen/census.pb.c \
+src/core/ext/census/gen/trace_context.pb.c \
src/core/ext/census/grpc_context.c \
src/core/ext/census/grpc_filter.c \
src/core/ext/census/grpc_plugin.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index ce94c5d5e89befb8b6982362691f2bde50196909..004ff4164edda4789d72e8683d4664aea8e50a31 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5595,6 +5595,7 @@
"src/core/ext/census/census_interface.h",
"src/core/ext/census/census_rpc_stats.h",
"src/core/ext/census/gen/census.pb.h",
+ "src/core/ext/census/gen/trace_context.pb.h",
"src/core/ext/census/grpc_filter.h",
"src/core/ext/census/mlog.h",
"src/core/ext/census/resource.h",
@@ -5612,6 +5613,8 @@
"src/core/ext/census/context.c",
"src/core/ext/census/gen/census.pb.c",
"src/core/ext/census/gen/census.pb.h",
+ "src/core/ext/census/gen/trace_context.pb.c",
+ "src/core/ext/census/gen/trace_context.pb.h",
"src/core/ext/census/grpc_context.c",
"src/core/ext/census/grpc_filter.c",
"src/core/ext/census/grpc_filter.h",
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index d805fdfdee53b44d3ce4fa3670f197d46b9c8212..6cceb17eb83060caf0de478de06e5680ff8f93de 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -454,6 +454,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\census_interface.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\census_rpc_stats.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\mlog.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\resource.h" />
@@ -820,6 +821,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_context.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 991bbec9e2592e5d8116a03e5c485ade590e6d40..16b2ed860fa4c380c46f82780c45a751fc19167f 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -541,6 +541,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.c">
<Filter>src\core\ext\census\gen</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.c">
+ <Filter>src\core\ext\census\gen</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_context.c">
<Filter>src\core\ext\census</Filter>
</ClCompile>
@@ -1130,6 +1133,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.h">
<Filter>src\core\ext\census\gen</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.h">
+ <Filter>src\core\ext\census\gen</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.h">
<Filter>src\core\ext\census</Filter>
</ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 66ec41d2c6a19dfe74480210fd5168949a580efe..0af0497980470fb0de3e45ba9ee5fdb1947b9428 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -420,6 +420,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\census_interface.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\census_rpc_stats.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\mlog.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\resource.h" />
@@ -728,6 +729,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_context.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 6f2dc3571e89b607949458fefb0bc6fb2e8f47e7..9f8727f5b4d4c1c1ccf181935c9e1c183c7e9efb 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -454,6 +454,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.c">
<Filter>src\core\ext\census\gen</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.c">
+ <Filter>src\core\ext\census\gen</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\ext\census\grpc_context.c">
<Filter>src\core\ext\census</Filter>
</ClCompile>
@@ -968,6 +971,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\census.pb.h">
<Filter>src\core\ext\census\gen</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\gen\trace_context.pb.h">
+ <Filter>src\core\ext\census\gen</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\ext\census\grpc_filter.h">
<Filter>src\core\ext\census</Filter>
</ClInclude>