Merge pull request #6843 from soltanmm/doc-tools

Add usage documentation to Python tools distribution
diff --git a/BUILD b/BUILD
index c9aed05..6ae1246 100644
--- a/BUILD
+++ b/BUILD
@@ -315,7 +315,7 @@
     "src/core/lib/channel/connected_channel.c",
     "src/core/lib/channel/http_client_filter.c",
     "src/core/lib/channel/http_server_filter.c",
-    "src/core/lib/compression/compression_algorithm.c",
+    "src/core/lib/compression/compression.c",
     "src/core/lib/compression/message_compress.c",
     "src/core/lib/debug/trace.c",
     "src/core/lib/http/format_request.c",
@@ -462,7 +462,9 @@
     "src/core/ext/client_config/subchannel_index.c",
     "src/core/ext/client_config/uri_parser.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
+    "src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c",
     "src/core/ext/transport/chttp2/client/insecure/channel_create.c",
+    "src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.c",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c",
     "src/core/ext/lb_policy/pick_first/pick_first.c",
@@ -488,6 +490,7 @@
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/compression.h",
     "include/grpc/grpc.h",
+    "include/grpc/grpc_posix.h",
     "include/grpc/status.h",
     "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
@@ -678,7 +681,7 @@
     "src/core/lib/channel/connected_channel.c",
     "src/core/lib/channel/http_client_filter.c",
     "src/core/lib/channel/http_server_filter.c",
-    "src/core/lib/compression/compression_algorithm.c",
+    "src/core/lib/compression/compression.c",
     "src/core/lib/compression/message_compress.c",
     "src/core/lib/debug/trace.c",
     "src/core/lib/http/format_request.c",
@@ -833,6 +836,7 @@
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/compression.h",
     "include/grpc/grpc.h",
+    "include/grpc/grpc_posix.h",
     "include/grpc/status.h",
     "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
@@ -1006,7 +1010,7 @@
     "src/core/lib/channel/connected_channel.c",
     "src/core/lib/channel/http_client_filter.c",
     "src/core/lib/channel/http_server_filter.c",
-    "src/core/lib/compression/compression_algorithm.c",
+    "src/core/lib/compression/compression.c",
     "src/core/lib/compression/message_compress.c",
     "src/core/lib/debug/trace.c",
     "src/core/lib/http/format_request.c",
@@ -1083,6 +1087,7 @@
     "src/core/lib/transport/transport.c",
     "src/core/lib/transport/transport_op_string.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
+    "src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c",
     "src/core/ext/transport/chttp2/transport/bin_encoder.c",
     "src/core/ext/transport/chttp2/transport/chttp2_plugin.c",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.c",
@@ -1106,6 +1111,7 @@
     "src/core/ext/transport/chttp2/transport/writing.c",
     "src/core/ext/transport/chttp2/alpn/alpn.c",
     "src/core/ext/transport/chttp2/client/insecure/channel_create.c",
+    "src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c",
     "src/core/ext/client_config/channel_connectivity.c",
     "src/core/ext/client_config/client_channel.c",
     "src/core/ext/client_config/client_channel_factory.c",
@@ -1150,6 +1156,7 @@
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/compression.h",
     "include/grpc/grpc.h",
+    "include/grpc/grpc_posix.h",
     "include/grpc/status.h",
     "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
@@ -1229,6 +1236,7 @@
     "src/cpp/client/client_context.cc",
     "src/cpp/client/create_channel.cc",
     "src/cpp/client/create_channel_internal.cc",
+    "src/cpp/client/create_channel_posix.cc",
     "src/cpp/client/credentials.cc",
     "src/cpp/client/generic_stub.cc",
     "src/cpp/client/insecure_credentials.cc",
@@ -1244,6 +1252,7 @@
     "src/cpp/server/server_builder.cc",
     "src/cpp/server/server_context.cc",
     "src/cpp/server/server_credentials.cc",
+    "src/cpp/server/server_posix.cc",
     "src/cpp/util/byte_buffer.cc",
     "src/cpp/util/slice.cc",
     "src/cpp/util/status.cc",
@@ -1257,6 +1266,7 @@
     "include/grpc++/client_context.h",
     "include/grpc++/completion_queue.h",
     "include/grpc++/create_channel.h",
+    "include/grpc++/create_channel_posix.h",
     "include/grpc++/generic/async_generic_service.h",
     "include/grpc++/generic/generic_stub.h",
     "include/grpc++/grpc++.h",
@@ -1285,6 +1295,7 @@
     "include/grpc++/server.h",
     "include/grpc++/server_builder.h",
     "include/grpc++/server_context.h",
+    "include/grpc++/server_posix.h",
     "include/grpc++/support/async_stream.h",
     "include/grpc++/support/async_unary_call.h",
     "include/grpc++/support/byte_buffer.h",
@@ -1373,6 +1384,7 @@
     "src/cpp/client/client_context.cc",
     "src/cpp/client/create_channel.cc",
     "src/cpp/client/create_channel_internal.cc",
+    "src/cpp/client/create_channel_posix.cc",
     "src/cpp/client/credentials.cc",
     "src/cpp/client/generic_stub.cc",
     "src/cpp/client/insecure_credentials.cc",
@@ -1388,6 +1400,7 @@
     "src/cpp/server/server_builder.cc",
     "src/cpp/server/server_context.cc",
     "src/cpp/server/server_credentials.cc",
+    "src/cpp/server/server_posix.cc",
     "src/cpp/util/byte_buffer.cc",
     "src/cpp/util/slice.cc",
     "src/cpp/util/status.cc",
@@ -1401,6 +1414,7 @@
     "include/grpc++/client_context.h",
     "include/grpc++/completion_queue.h",
     "include/grpc++/create_channel.h",
+    "include/grpc++/create_channel_posix.h",
     "include/grpc++/generic/async_generic_service.h",
     "include/grpc++/generic/generic_stub.h",
     "include/grpc++/grpc++.h",
@@ -1429,6 +1443,7 @@
     "include/grpc++/server.h",
     "include/grpc++/server_builder.h",
     "include/grpc++/server_context.h",
+    "include/grpc++/server_posix.h",
     "include/grpc++/support/async_stream.h",
     "include/grpc++/support/async_unary_call.h",
     "include/grpc++/support/byte_buffer.h",
@@ -1693,7 +1708,7 @@
     "src/core/lib/channel/connected_channel.c",
     "src/core/lib/channel/http_client_filter.c",
     "src/core/lib/channel/http_server_filter.c",
-    "src/core/lib/compression/compression_algorithm.c",
+    "src/core/lib/compression/compression.c",
     "src/core/lib/compression/message_compress.c",
     "src/core/lib/debug/trace.c",
     "src/core/lib/http/format_request.c",
@@ -1840,7 +1855,9 @@
     "src/core/ext/client_config/subchannel_index.c",
     "src/core/ext/client_config/uri_parser.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
+    "src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c",
     "src/core/ext/transport/chttp2/client/insecure/channel_create.c",
+    "src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.c",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c",
     "src/core/ext/lb_policy/pick_first/pick_first.c",
@@ -1866,6 +1883,7 @@
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/compression.h",
     "include/grpc/grpc.h",
+    "include/grpc/grpc_posix.h",
     "include/grpc/status.h",
     "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
diff --git a/Makefile b/Makefile
index fdbedfd..db98f3f 100644
--- a/Makefile
+++ b/Makefile
@@ -1103,6 +1103,7 @@
 h2_census_test: $(BINDIR)/$(CONFIG)/h2_census_test
 h2_compress_test: $(BINDIR)/$(CONFIG)/h2_compress_test
 h2_fakesec_test: $(BINDIR)/$(CONFIG)/h2_fakesec_test
+h2_fd_test: $(BINDIR)/$(CONFIG)/h2_fd_test
 h2_full_test: $(BINDIR)/$(CONFIG)/h2_full_test
 h2_full+pipe_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_test
 h2_full+trace_test: $(BINDIR)/$(CONFIG)/h2_full+trace_test
@@ -1118,6 +1119,7 @@
 h2_uds_test: $(BINDIR)/$(CONFIG)/h2_uds_test
 h2_census_nosec_test: $(BINDIR)/$(CONFIG)/h2_census_nosec_test
 h2_compress_nosec_test: $(BINDIR)/$(CONFIG)/h2_compress_nosec_test
+h2_fd_nosec_test: $(BINDIR)/$(CONFIG)/h2_fd_nosec_test
 h2_full_nosec_test: $(BINDIR)/$(CONFIG)/h2_full_nosec_test
 h2_full+pipe_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test
 h2_full+trace_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test
@@ -1335,6 +1337,7 @@
   $(BINDIR)/$(CONFIG)/h2_census_test \
   $(BINDIR)/$(CONFIG)/h2_compress_test \
   $(BINDIR)/$(CONFIG)/h2_fakesec_test \
+  $(BINDIR)/$(CONFIG)/h2_fd_test \
   $(BINDIR)/$(CONFIG)/h2_full_test \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_test \
   $(BINDIR)/$(CONFIG)/h2_full+trace_test \
@@ -1350,6 +1353,7 @@
   $(BINDIR)/$(CONFIG)/h2_uds_test \
   $(BINDIR)/$(CONFIG)/h2_census_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_compress_nosec_test \
+  $(BINDIR)/$(CONFIG)/h2_fd_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test \
@@ -2483,7 +2487,7 @@
     src/core/lib/channel/connected_channel.c \
     src/core/lib/channel/http_client_filter.c \
     src/core/lib/channel/http_server_filter.c \
-    src/core/lib/compression/compression_algorithm.c \
+    src/core/lib/compression/compression.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/debug/trace.c \
     src/core/lib/http/format_request.c \
@@ -2630,7 +2634,9 @@
     src/core/ext/client_config/subchannel_index.c \
     src/core/ext/client_config/uri_parser.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
+    src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c \
     src/core/ext/transport/chttp2/client/insecure/channel_create.c \
+    src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c \
     src/core/ext/lb_policy/grpclb/load_balancer_api.c \
     src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
     third_party/nanopb/pb_common.c \
@@ -2659,6 +2665,7 @@
     include/grpc/byte_buffer_reader.h \
     include/grpc/compression.h \
     include/grpc/grpc.h \
+    include/grpc/grpc_posix.h \
     include/grpc/status.h \
     include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
@@ -2746,7 +2753,7 @@
     src/core/lib/channel/connected_channel.c \
     src/core/lib/channel/http_client_filter.c \
     src/core/lib/channel/http_server_filter.c \
-    src/core/lib/compression/compression_algorithm.c \
+    src/core/lib/compression/compression.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/debug/trace.c \
     src/core/lib/http/format_request.c \
@@ -2901,6 +2908,7 @@
     include/grpc/byte_buffer_reader.h \
     include/grpc/compression.h \
     include/grpc/grpc.h \
+    include/grpc/grpc_posix.h \
     include/grpc/status.h \
     include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
@@ -3080,7 +3088,7 @@
     src/core/lib/channel/connected_channel.c \
     src/core/lib/channel/http_client_filter.c \
     src/core/lib/channel/http_server_filter.c \
-    src/core/lib/compression/compression_algorithm.c \
+    src/core/lib/compression/compression.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/debug/trace.c \
     src/core/lib/http/format_request.c \
@@ -3157,6 +3165,7 @@
     src/core/lib/transport/transport.c \
     src/core/lib/transport/transport_op_string.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
+    src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c \
     src/core/ext/transport/chttp2/transport/bin_encoder.c \
     src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
     src/core/ext/transport/chttp2/transport/chttp2_transport.c \
@@ -3180,6 +3189,7 @@
     src/core/ext/transport/chttp2/transport/writing.c \
     src/core/ext/transport/chttp2/alpn/alpn.c \
     src/core/ext/transport/chttp2/client/insecure/channel_create.c \
+    src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c \
     src/core/ext/client_config/channel_connectivity.c \
     src/core/ext/client_config/client_channel.c \
     src/core/ext/client_config/client_channel_factory.c \
@@ -3227,6 +3237,7 @@
     include/grpc/byte_buffer_reader.h \
     include/grpc/compression.h \
     include/grpc/grpc.h \
+    include/grpc/grpc_posix.h \
     include/grpc/status.h \
     include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
@@ -3420,6 +3431,7 @@
     src/cpp/client/client_context.cc \
     src/cpp/client/create_channel.cc \
     src/cpp/client/create_channel_internal.cc \
+    src/cpp/client/create_channel_posix.cc \
     src/cpp/client/credentials.cc \
     src/cpp/client/generic_stub.cc \
     src/cpp/client/insecure_credentials.cc \
@@ -3435,6 +3447,7 @@
     src/cpp/server/server_builder.cc \
     src/cpp/server/server_context.cc \
     src/cpp/server/server_credentials.cc \
+    src/cpp/server/server_posix.cc \
     src/cpp/util/byte_buffer.cc \
     src/cpp/util/slice.cc \
     src/cpp/util/status.cc \
@@ -3448,6 +3461,7 @@
     include/grpc++/client_context.h \
     include/grpc++/completion_queue.h \
     include/grpc++/create_channel.h \
+    include/grpc++/create_channel_posix.h \
     include/grpc++/generic/async_generic_service.h \
     include/grpc++/generic/generic_stub.h \
     include/grpc++/grpc++.h \
@@ -3476,6 +3490,7 @@
     include/grpc++/server.h \
     include/grpc++/server_builder.h \
     include/grpc++/server_context.h \
+    include/grpc++/server_posix.h \
     include/grpc++/support/async_stream.h \
     include/grpc++/support/async_unary_call.h \
     include/grpc++/support/byte_buffer.h \
@@ -3776,6 +3791,7 @@
     src/cpp/client/client_context.cc \
     src/cpp/client/create_channel.cc \
     src/cpp/client/create_channel_internal.cc \
+    src/cpp/client/create_channel_posix.cc \
     src/cpp/client/credentials.cc \
     src/cpp/client/generic_stub.cc \
     src/cpp/client/insecure_credentials.cc \
@@ -3791,6 +3807,7 @@
     src/cpp/server/server_builder.cc \
     src/cpp/server/server_context.cc \
     src/cpp/server/server_credentials.cc \
+    src/cpp/server/server_posix.cc \
     src/cpp/util/byte_buffer.cc \
     src/cpp/util/slice.cc \
     src/cpp/util/status.cc \
@@ -3804,6 +3821,7 @@
     include/grpc++/client_context.h \
     include/grpc++/completion_queue.h \
     include/grpc++/create_channel.h \
+    include/grpc++/create_channel_posix.h \
     include/grpc++/generic/async_generic_service.h \
     include/grpc++/generic/generic_stub.h \
     include/grpc++/grpc++.h \
@@ -3832,6 +3850,7 @@
     include/grpc++/server.h \
     include/grpc++/server_builder.h \
     include/grpc++/server_context.h \
+    include/grpc++/server_posix.h \
     include/grpc++/support/async_stream.h \
     include/grpc++/support/async_unary_call.h \
     include/grpc++/support/byte_buffer.h \
@@ -4255,6 +4274,7 @@
     test/cpp/qps/client_sync.cc \
     test/cpp/qps/driver.cc \
     test/cpp/qps/limit_cores.cc \
+    test/cpp/qps/parse_json.cc \
     test/cpp/qps/qps_worker.cc \
     test/cpp/qps/report.cc \
     test/cpp/qps/server_async.cc \
@@ -4310,6 +4330,7 @@
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/client_sync.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/driver.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/limit_cores.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/parse_json.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/qps_worker.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/report.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/server_async.o: $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/services.pb.cc $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc
@@ -11331,7 +11352,6 @@
 
 
 QPS_JSON_DRIVER_SRC = \
-    test/cpp/qps/parse_json.cc \
     test/cpp/qps/qps_json_driver.cc \
 
 QPS_JSON_DRIVER_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(QPS_JSON_DRIVER_SRC))))
@@ -11363,8 +11383,6 @@
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/cpp/qps/parse_json.o:  $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
-
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/qps_json_driver.o:  $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
 
 deps_qps_json_driver: $(QPS_JSON_DRIVER_OBJS:.o=.dep)
@@ -13556,6 +13574,38 @@
 endif
 
 
+H2_FD_TEST_SRC = \
+    test/core/end2end/fixtures/h2_fd.c \
+
+H2_FD_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FD_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/h2_fd_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/h2_fd_test: $(H2_FD_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(H2_FD_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/h2_fd_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_fd.o:  $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_fd_test: $(H2_FD_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(H2_FD_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 H2_FULL_TEST_SRC = \
     test/core/end2end/fixtures/h2_full.c \
 
@@ -14012,6 +14062,26 @@
 endif
 
 
+H2_FD_NOSEC_TEST_SRC = \
+    test/core/end2end/fixtures/h2_fd.c \
+
+H2_FD_NOSEC_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FD_NOSEC_TEST_SRC))))
+
+
+$(BINDIR)/$(CONFIG)/h2_fd_nosec_test: $(H2_FD_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(H2_FD_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/h2_fd_nosec_test
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_fd.o:  $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_fd_nosec_test: $(H2_FD_NOSEC_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_DEPS),true)
+-include $(H2_FD_NOSEC_TEST_OBJS:.o=.dep)
+endif
+
+
 H2_FULL_NOSEC_TEST_SRC = \
     test/core/end2end/fixtures/h2_full.c \
 
@@ -14577,6 +14647,7 @@
 test/cpp/qps/client_sync.cc: $(OPENSSL_DEP)
 test/cpp/qps/driver.cc: $(OPENSSL_DEP)
 test/cpp/qps/limit_cores.cc: $(OPENSSL_DEP)
+test/cpp/qps/parse_json.cc: $(OPENSSL_DEP)
 test/cpp/qps/qps_worker.cc: $(OPENSSL_DEP)
 test/cpp/qps/report.cc: $(OPENSSL_DEP)
 test/cpp/qps/server_async.cc: $(OPENSSL_DEP)
diff --git a/binding.gyp b/binding.gyp
index 4d9e9a4..9b4ae5e 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -571,7 +571,7 @@
         'src/core/lib/channel/connected_channel.c',
         'src/core/lib/channel/http_client_filter.c',
         'src/core/lib/channel/http_server_filter.c',
-        'src/core/lib/compression/compression_algorithm.c',
+        'src/core/lib/compression/compression.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/debug/trace.c',
         'src/core/lib/http/format_request.c',
@@ -718,7 +718,9 @@
         'src/core/ext/client_config/subchannel_index.c',
         'src/core/ext/client_config/uri_parser.c',
         'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
+        'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c',
         'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
+        'src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c',
         'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
         'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
         'third_party/nanopb/pb_common.c',
diff --git a/build.yaml b/build.yaml
index 8c09c55..a94fb05 100644
--- a/build.yaml
+++ b/build.yaml
@@ -154,6 +154,7 @@
   - include/grpc/byte_buffer_reader.h
   - include/grpc/compression.h
   - include/grpc/grpc.h
+  - include/grpc/grpc_posix.h
   - include/grpc/status.h
   headers:
   - src/core/lib/channel/channel_args.h
@@ -239,7 +240,7 @@
   - src/core/lib/channel/connected_channel.c
   - src/core/lib/channel/http_client_filter.c
   - src/core/lib/channel/http_server_filter.c
-  - src/core/lib/compression/compression_algorithm.c
+  - src/core/lib/compression/compression.c
   - src/core/lib/compression/message_compress.c
   - src/core/lib/debug/trace.c
   - src/core/lib/http/format_request.c
@@ -561,6 +562,7 @@
 - name: grpc_transport_chttp2_client_insecure
   src:
   - src/core/ext/transport/chttp2/client/insecure/channel_create.c
+  - src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
   uses:
   - grpc_transport_chttp2
   - grpc_base
@@ -576,6 +578,7 @@
 - name: grpc_transport_chttp2_server_insecure
   src:
   - src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
+  - src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c
   uses:
   - grpc_transport_chttp2
   - grpc_base
@@ -632,6 +635,7 @@
   - include/grpc++/client_context.h
   - include/grpc++/completion_queue.h
   - include/grpc++/create_channel.h
+  - include/grpc++/create_channel_posix.h
   - include/grpc++/generic/async_generic_service.h
   - include/grpc++/generic/generic_stub.h
   - include/grpc++/grpc++.h
@@ -660,6 +664,7 @@
   - include/grpc++/server.h
   - include/grpc++/server_builder.h
   - include/grpc++/server_context.h
+  - include/grpc++/server_posix.h
   - include/grpc++/support/async_stream.h
   - include/grpc++/support/async_unary_call.h
   - include/grpc++/support/byte_buffer.h
@@ -681,6 +686,7 @@
   - src/cpp/client/client_context.cc
   - src/cpp/client/create_channel.cc
   - src/cpp/client/create_channel_internal.cc
+  - src/cpp/client/create_channel_posix.cc
   - src/cpp/client/credentials.cc
   - src/cpp/client/generic_stub.cc
   - src/cpp/client/insecure_credentials.cc
@@ -696,6 +702,7 @@
   - src/cpp/server/server_builder.cc
   - src/cpp/server/server_context.cc
   - src/cpp/server/server_credentials.cc
+  - src/cpp/server/server_posix.cc
   - src/cpp/util/byte_buffer.cc
   - src/cpp/util/slice.cc
   - src/cpp/util/status.cc
@@ -1120,6 +1127,7 @@
   - test/cpp/qps/histogram.h
   - test/cpp/qps/interarrival.h
   - test/cpp/qps/limit_cores.h
+  - test/cpp/qps/parse_json.h
   - test/cpp/qps/qps_worker.h
   - test/cpp/qps/report.h
   - test/cpp/qps/server.h
@@ -1136,6 +1144,7 @@
   - test/cpp/qps/client_sync.cc
   - test/cpp/qps/driver.cc
   - test/cpp/qps/limit_cores.cc
+  - test/cpp/qps/parse_json.cc
   - test/cpp/qps/qps_worker.cc
   - test/cpp/qps/report.cc
   - test/cpp/qps/server_async.cc
@@ -2811,10 +2820,7 @@
   build: test
   run: false
   language: c++
-  headers:
-  - test/cpp/qps/parse_json.h
   src:
-  - test/cpp/qps/parse_json.cc
   - test/cpp/qps/qps_json_driver.cc
   deps:
   - qps
diff --git a/config.m4 b/config.m4
index 54adac1..cd653d31 100644
--- a/config.m4
+++ b/config.m4
@@ -90,7 +90,7 @@
     src/core/lib/channel/connected_channel.c \
     src/core/lib/channel/http_client_filter.c \
     src/core/lib/channel/http_server_filter.c \
-    src/core/lib/compression/compression_algorithm.c \
+    src/core/lib/compression/compression.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/debug/trace.c \
     src/core/lib/http/format_request.c \
@@ -237,7 +237,9 @@
     src/core/ext/client_config/subchannel_index.c \
     src/core/ext/client_config/uri_parser.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
+    src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c \
     src/core/ext/transport/chttp2/client/insecure/channel_create.c \
+    src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c \
     src/core/ext/lb_policy/grpclb/load_balancer_api.c \
     src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
     third_party/nanopb/pb_common.c \
diff --git a/examples/cpp/helloworld/greeter_async_client.cc b/examples/cpp/helloworld/greeter_async_client.cc
index c1f5eb5..33de59f 100644
--- a/examples/cpp/helloworld/greeter_async_client.cc
+++ b/examples/cpp/helloworld/greeter_async_client.cc
@@ -87,7 +87,9 @@
     void* got_tag;
     bool ok = false;
     // Block until the next result is available in the completion queue "cq".
-    cq.Next(&got_tag, &ok);
+    // The return value of Next should always be checked. This return value
+    // tells us whether there is any kind of event or the cq_ is shutting down.
+    GPR_ASSERT(cq.Next(&got_tag, &ok));
 
     // Verify that the result from "cq" corresponds, by its tag, our previous
     // request.
diff --git a/examples/cpp/helloworld/greeter_async_server.cc b/examples/cpp/helloworld/greeter_async_server.cc
index 64e065b..ead4418 100644
--- a/examples/cpp/helloworld/greeter_async_server.cc
+++ b/examples/cpp/helloworld/greeter_async_server.cc
@@ -160,7 +160,9 @@
       // Block waiting to read the next event from the completion queue. The
       // event is uniquely identified by its tag, which in this case is the
       // memory address of a CallData instance.
-      cq_->Next(&tag, &ok);
+      // The return value of Next should always be checked. This return value
+      // tells us whether there is any kind of event or cq_ is shutting down.
+      GPR_ASSERT(cq_->Next(&tag, &ok));
       GPR_ASSERT(ok);
       static_cast<CallData*>(tag)->Proceed();
     }
diff --git a/gRPC.podspec b/gRPC.podspec
index 8e8f3f5..10a836e 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -318,6 +318,7 @@
                       'include/grpc/byte_buffer_reader.h',
                       'include/grpc/compression.h',
                       'include/grpc/grpc.h',
+                      'include/grpc/grpc_posix.h',
                       'include/grpc/status.h',
                       'include/grpc/impl/codegen/byte_buffer.h',
                       'include/grpc/impl/codegen/byte_buffer_reader.h',
@@ -351,7 +352,7 @@
                       'src/core/lib/channel/connected_channel.c',
                       'src/core/lib/channel/http_client_filter.c',
                       'src/core/lib/channel/http_server_filter.c',
-                      'src/core/lib/compression/compression_algorithm.c',
+                      'src/core/lib/compression/compression.c',
                       'src/core/lib/compression/message_compress.c',
                       'src/core/lib/debug/trace.c',
                       'src/core/lib/http/format_request.c',
@@ -498,7 +499,9 @@
                       'src/core/ext/client_config/subchannel_index.c',
                       'src/core/ext/client_config/uri_parser.c',
                       'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
+                      'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c',
                       'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
+                      'src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c',
                       'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
                       'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
                       'third_party/nanopb/pb_common.c',
diff --git a/grpc.def b/grpc.def
index 3477bd9..0046028 100644
--- a/grpc.def
+++ b/grpc.def
@@ -88,6 +88,8 @@
     grpc_header_nonbin_value_is_legal
     grpc_is_binary_header
     grpc_call_error_to_string
+    grpc_insecure_channel_create_from_fd
+    grpc_server_add_insecure_channel_from_fd
     grpc_auth_property_iterator_next
     grpc_auth_context_property_iterator
     grpc_auth_context_peer_identity
diff --git a/grpc.gemspec b/grpc.gemspec
index 49ea3b0..24d512d 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -147,6 +147,7 @@
   s.files += %w( include/grpc/byte_buffer_reader.h )
   s.files += %w( include/grpc/compression.h )
   s.files += %w( include/grpc/grpc.h )
+  s.files += %w( include/grpc/grpc_posix.h )
   s.files += %w( include/grpc/status.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer_reader.h )
@@ -330,7 +331,7 @@
   s.files += %w( src/core/lib/channel/connected_channel.c )
   s.files += %w( src/core/lib/channel/http_client_filter.c )
   s.files += %w( src/core/lib/channel/http_server_filter.c )
-  s.files += %w( src/core/lib/compression/compression_algorithm.c )
+  s.files += %w( src/core/lib/compression/compression.c )
   s.files += %w( src/core/lib/compression/message_compress.c )
   s.files += %w( src/core/lib/debug/trace.c )
   s.files += %w( src/core/lib/http/format_request.c )
@@ -477,7 +478,9 @@
   s.files += %w( src/core/ext/client_config/subchannel_index.c )
   s.files += %w( src/core/ext/client_config/uri_parser.c )
   s.files += %w( src/core/ext/transport/chttp2/server/insecure/server_chttp2.c )
+  s.files += %w( src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c )
   s.files += %w( src/core/ext/transport/chttp2/client/insecure/channel_create.c )
+  s.files += %w( src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c )
   s.files += %w( src/core/ext/lb_policy/grpclb/load_balancer_api.c )
   s.files += %w( src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c )
   s.files += %w( third_party/nanopb/pb_common.c )
diff --git a/include/grpc++/create_channel_posix.h b/include/grpc++/create_channel_posix.h
new file mode 100644
index 0000000..0d96159
--- /dev/null
+++ b/include/grpc++/create_channel_posix.h
@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_CREATE_CHANNEL_POSIX_H
+#define GRPCXX_CREATE_CHANNEL_POSIX_H
+
+#include <memory>
+
+#include <grpc++/channel.h>
+#include <grpc/support/port_platform.h>
+
+namespace grpc {
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+/// Create a new \a Channel communicating over given file descriptor
+///
+/// \param target The name of the target.
+/// \param fd The file descriptor representing a socket.
+std::shared_ptr<Channel> CreateInsecureChannelFromFd(const grpc::string& target,
+                                                     int fd);
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
+
+}  // namespace grpc
+
+#endif  // GRPCXX_CREATE_CHANNEL_POSIX_H
diff --git a/include/grpc++/grpc++.h b/include/grpc++/grpc++.h
index b7d5fb0..ef07e19 100644
--- a/include/grpc++/grpc++.h
+++ b/include/grpc++/grpc++.h
@@ -57,8 +57,10 @@
 #include <grpc++/client_context.h>
 #include <grpc++/completion_queue.h>
 #include <grpc++/create_channel.h>
+#include <grpc++/create_channel_posix.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc++/server_posix.h>
 
 #endif  // GRPCXX_GRPCXX_H
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index 4f550b4..d720f27 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -47,7 +47,9 @@
 #include <grpc++/impl/codegen/serialization_traits.h>
 #include <grpc++/impl/codegen/status.h>
 #include <grpc++/impl/codegen/string_ref.h>
+
 #include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
 
 struct grpc_byte_buffer;
@@ -187,6 +189,8 @@
     flags_ = flags;
     initial_metadata_count_ = metadata.size();
     initial_metadata_ = FillMetadataArray(metadata);
+    // TODO(dgq): expose compression level in API so it can be properly set.
+    maybe_compression_level_.is_set = false;
   }
 
  protected:
@@ -198,6 +202,10 @@
     op->reserved = NULL;
     op->data.send_initial_metadata.count = initial_metadata_count_;
     op->data.send_initial_metadata.metadata = initial_metadata_;
+    op->data.send_initial_metadata.maybe_compression_level.is_set =
+        maybe_compression_level_.is_set;
+    op->data.send_initial_metadata.maybe_compression_level.level =
+        maybe_compression_level_.level;
   }
   void FinishOp(bool* status, int max_message_size) {
     if (!send_) return;
@@ -209,6 +217,10 @@
   uint32_t flags_;
   size_t initial_metadata_count_;
   grpc_metadata* initial_metadata_;
+  struct {
+    bool is_set;
+    grpc_compression_level level;
+  } maybe_compression_level_;
 };
 
 class CallOpSendMessage {
diff --git a/include/grpc++/server.h b/include/grpc++/server.h
index a0ee0e9..7a8858e 100644
--- a/include/grpc++/server.h
+++ b/include/grpc++/server.h
@@ -93,6 +93,12 @@
   /// until all server objects in the process have been destroyed.
   static void SetGlobalCallbacks(GlobalCallbacks* callbacks);
 
+  // Returns a \em raw pointer to the underlying grpc_server instance.
+  grpc_server* c_server();
+
+  // Returns a \em raw pointer to the underlying CompletionQueue.
+  CompletionQueue* completion_queue();
+
  private:
   friend class AsyncGenericService;
   friend class ServerBuilder;
diff --git a/include/grpc++/server_builder.h b/include/grpc++/server_builder.h
index 8525cb7..54f01d1 100644
--- a/include/grpc++/server_builder.h
+++ b/include/grpc++/server_builder.h
@@ -66,29 +66,43 @@
   /// The service must exist for the lifetime of the \a Server instance returned
   /// by \a BuildAndStart().
   /// Matches requests with any :authority
-  void RegisterService(Service* service);
+  ServerBuilder& RegisterService(Service* service);
 
   /// Register a generic service.
   /// Matches requests with any :authority
-  void RegisterAsyncGenericService(AsyncGenericService* service);
+  ServerBuilder& RegisterAsyncGenericService(AsyncGenericService* service);
 
   /// Register a service. This call does not take ownership of the service.
   /// The service must exist for the lifetime of the \a Server instance returned
   /// by BuildAndStart().
   /// Only matches requests with :authority \a host
-  void RegisterService(const grpc::string& host, Service* service);
+  ServerBuilder& RegisterService(const grpc::string& host, Service* service);
 
   /// Set max message size in bytes.
-  void SetMaxMessageSize(int max_message_size) {
+  ServerBuilder& SetMaxMessageSize(int max_message_size) {
     max_message_size_ = max_message_size;
+    return *this;
   }
 
-  /// Set the compression options to be used by the server.
-  void SetCompressionOptions(const grpc_compression_options& options) {
-    compression_options_ = options;
-  }
+  /// Set the support status for compression algorithms. All algorithms are
+  /// enabled by default.
+  ///
+  /// Incoming calls compressed with an unsupported algorithm will fail with
+  /// GRPC_STATUS_UNIMPLEMENTED.
+  ServerBuilder& SetCompressionAlgorithmSupportStatus(
+      grpc_compression_algorithm algorithm, bool enabled);
 
-  void SetOption(std::unique_ptr<ServerBuilderOption> option);
+  /// The default compression level to use for all channel calls in the
+  /// absence of a call-specific level.
+  ServerBuilder& SetDefaultCompressionLevel(grpc_compression_level level);
+
+  /// The default compression algorithm to use for all channel calls in the
+  /// absence of a call-specific level. Note that it overrides any compression
+  /// level set by \a SetDefaultCompressionLevel.
+  ServerBuilder& SetDefaultCompressionAlgorithm(
+      grpc_compression_algorithm algorithm);
+
+  ServerBuilder& SetOption(std::unique_ptr<ServerBuilderOption> option);
 
   /// Tries to bind \a server to the given \a addr.
   ///
@@ -101,9 +115,9 @@
   /// number. \a nullptr otherwise.
   ///
   // TODO(dgq): the "port" part seems to be a misnomer.
-  void AddListeningPort(const grpc::string& addr,
-                        std::shared_ptr<ServerCredentials> creds,
-                        int* selected_port = nullptr);
+  ServerBuilder& AddListeningPort(const grpc::string& addr,
+                                  std::shared_ptr<ServerCredentials> creds,
+                                  int* selected_port = nullptr);
 
   /// Add a completion queue for handling asynchronous services
   /// Caller is required to keep this completion queue live until
@@ -144,7 +158,6 @@
   };
 
   int max_message_size_;
-  grpc_compression_options compression_options_;
   std::vector<std::unique_ptr<ServerBuilderOption>> options_;
   std::vector<std::unique_ptr<NamedService>> services_;
   std::vector<Port> ports_;
@@ -152,6 +165,15 @@
   std::shared_ptr<ServerCredentials> creds_;
   std::map<grpc::string, std::unique_ptr<ServerBuilderPlugin>> plugins_;
   AsyncGenericService* generic_service_;
+  struct {
+    bool is_set;
+    grpc_compression_level level;
+  } maybe_default_compression_level_;
+  struct {
+    bool is_set;
+    grpc_compression_algorithm algorithm;
+  } maybe_default_compression_algorithm_;
+  uint32_t enabled_compression_algorithms_bitset_;
 };
 
 }  // namespace grpc
diff --git a/include/grpc++/server_posix.h b/include/grpc++/server_posix.h
new file mode 100644
index 0000000..e6066d4
--- /dev/null
+++ b/include/grpc++/server_posix.h
@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_SERVER_POSIX_H
+#define GRPCXX_SERVER_POSIX_H
+
+#include <memory>
+
+#include <grpc++/server.h>
+#include <grpc/support/port_platform.h>
+
+namespace grpc {
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+/// Adds new client to a \a Server communicating over given file descriptor
+///
+/// \param server The server to add a client to.
+/// \param fd The file descriptor representing a socket.
+void AddInsecureChannelFromFd(Server* server, int fd);
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
+
+}  // namespace grpc
+
+#endif  // GRPCXX_SERVER_POSIX_H
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index 8de4b13..22bcf0e 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -51,7 +51,8 @@
     grpc_compression_algorithm *algorithm);
 
 /** Updates \a name with the encoding name corresponding to a valid \a
- * algorithm.  Returns 1 upon success, 0 otherwise. */
+ * algorithm. Note that \a name is statically allocated and must *not* be freed.
+ * Returns 1 upon success, 0 otherwise. */
 GRPCAPI int grpc_compression_algorithm_name(
     grpc_compression_algorithm algorithm, char **name);
 
diff --git a/include/grpc/grpc_posix.h b/include/grpc/grpc_posix.h
new file mode 100644
index 0000000..9742b83
--- /dev/null
+++ b/include/grpc/grpc_posix.h
@@ -0,0 +1,70 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_GRPC_POSIX_H
+#define GRPC_GRPC_POSIX_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/port_platform.h>
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*! \mainpage GRPC Core POSIX
+ *
+ * The GRPC Core POSIX library provides some POSIX-specific low-level
+ * functionality on top of GRPC Core.
+ */
+
+/** Create a client channel to 'target' using file descriptor 'fd'. The 'target'
+    argument will be used to indicate the name for this channel. See the comment
+    for grpc_insecure_channel_create for description of 'args' argument. */
+GRPCAPI grpc_channel *grpc_insecure_channel_create_from_fd(
+    const char *target, int fd, const grpc_channel_args *args);
+
+/** Add the connected communication channel based on file descriptor 'fd' to the
+    'server'. The 'fd' must be an open file descriptor corresponding to a
+    connected socket. The 'cq' is a completion queue that will be getting events
+    from that descriptor. */
+GRPCAPI void grpc_server_add_insecure_channel_from_fd(grpc_server *server,
+                                                      grpc_completion_queue *cq,
+                                                      int fd);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_GRPC_POSIX_H */
diff --git a/include/grpc/impl/codegen/compression_types.h b/include/grpc/impl/codegen/compression_types.h
index 8d2ec3b..9065d1e 100644
--- a/include/grpc/impl/codegen/compression_types.h
+++ b/include/grpc/impl/codegen/compression_types.h
@@ -35,11 +35,17 @@
 #define GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
 
 #include <grpc/impl/codegen/port_platform.h>
+#include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/** To be used as initial metadata key for the request of a concrete compression
+ * algorithm */
+#define GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY \
+  "grpc-internal-encoding-request"
+
 /** To be used in channel arguments */
 #define GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM \
   "grpc.default_compression_algorithm"
@@ -74,15 +80,24 @@
    */
   uint32_t enabled_algorithms_bitset;
 
-  /** The default channel compression algorithm. It'll be used in the absence of
-   * call specific settings. This option corresponds to the channel argument key
-   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM */
-  grpc_compression_algorithm default_compression_algorithm;
-
   /** The default channel compression level. It'll be used in the absence of
    * call specific settings. This option corresponds to the channel argument key
-   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL */
-  grpc_compression_algorithm default_compression_level;
+   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL. If present, takes
+   * precedence over \a default_algorithm.
+   * TODO(dgq): currently only available for server channels. */
+  struct {
+    bool is_set;
+    grpc_compression_level level;
+  } default_level;
+
+  /** The default channel compression algorithm. It'll be used in the absence of
+   * call specific settings. This option corresponds to the channel argument key
+   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM. */
+  struct {
+    bool is_set;
+    grpc_compression_algorithm algorithm;
+  } default_algorithm;
+
 } grpc_compression_options;
 
 #ifdef __cplusplus
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index 7181be4..c51ffa4 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -334,6 +334,12 @@
     struct {
       size_t count;
       grpc_metadata *metadata;
+      /** If \a is_set, \a compression_level will be used for the call.
+       * Otherwise, \a compression_level won't be considered */
+      struct {
+        uint8_t is_set;
+        grpc_compression_level level;
+      } maybe_compression_level;
     } send_initial_metadata;
     grpc_byte_buffer *send_message;
     struct {
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index be4215a..7fff36c 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -129,6 +129,7 @@
 #define GPR_POSIX_SOCKETADDR 1
 #define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
 #define GPR_POSIX_SOCKETUTILS 1
+#define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_HAVE_UNIX_SOCKET 1
 #define GPR_HAVE_IP_PKTINFO 1
 #define GPR_HAVE_IPV6_RECVPKTINFO 1
@@ -168,6 +169,7 @@
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_HAVE_MSG_NOSIGNAL 1
 #define GPR_HAVE_UNIX_SOCKET 1
 #define GPR_HAVE_IP_PKTINFO 1
@@ -194,6 +196,7 @@
 #define GPR_POSIX_WAKEUP_FD 1
 #define GPR_POSIX_SOCKET 1
 #define GPR_POSIX_SOCKETADDR 1
+#define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_HAVE_UNIX_SOCKET 1
 #define GPR_HAVE_IP_PKTINFO 1
 #define GPR_HAVE_IPV6_RECVPKTINFO 1
@@ -258,6 +261,7 @@
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_HAVE_SO_NOSIGPIPE 1
 #define GPR_HAVE_UNIX_SOCKET 1
 #define GPR_HAVE_IP_PKTINFO 1
@@ -289,6 +293,7 @@
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_HAVE_SO_NOSIGPIPE 1
 #define GPR_HAVE_UNIX_SOCKET 1
 #define GPR_HAVE_IP_PKTINFO 1
diff --git a/package.xml b/package.xml
index f780f80..9fa63e3 100644
--- a/package.xml
+++ b/package.xml
@@ -154,6 +154,7 @@
     <file baseinstalldir="/" name="include/grpc/byte_buffer_reader.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/compression.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/grpc_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/status.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer_reader.h" role="src" />
@@ -337,7 +338,7 @@
     <file baseinstalldir="/" name="src/core/lib/channel/connected_channel.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/channel/http_client_filter.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/channel/http_server_filter.c" role="src" />
-    <file baseinstalldir="/" name="src/core/lib/compression/compression_algorithm.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/compression/compression.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/compression/message_compress.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/debug/trace.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/http/format_request.c" role="src" />
@@ -484,7 +485,9 @@
     <file baseinstalldir="/" name="src/core/ext/client_config/subchannel_index.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/client_config/uri_parser.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/server/insecure/server_chttp2.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/client/insecure/channel_create.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/load_balancer_api.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c" role="src" />
     <file baseinstalldir="/" name="third_party/nanopb/pb_common.c" role="src" />
diff --git a/setup.py b/setup.py
index 0e2646d..018d047 100644
--- a/setup.py
+++ b/setup.py
@@ -234,8 +234,7 @@
   ext_modules=CYTHON_EXTENSION_MODULES,
   packages=list(PACKAGES),
   package_dir=PACKAGE_DIRECTORIES,
-  # TODO(atash): Figure out why auditwheel doesn't like namespace packages.
-  #namespace_packages=['grpc'],
+  namespace_packages=['grpc'],
   package_data=PACKAGE_DATA,
   install_requires=INSTALL_REQUIRES,
   setup_requires=SETUP_REQUIRES,
diff --git a/src/core/ext/lb_policy/round_robin/round_robin.c b/src/core/ext/lb_policy/round_robin/round_robin.c
index 8645333..da2cdfe 100644
--- a/src/core/ext/lb_policy/round_robin/round_robin.c
+++ b/src/core/ext/lb_policy/round_robin/round_robin.c
@@ -31,6 +31,34 @@
  *
  */
 
+/** Round Robin Policy.
+ *
+ * This policy keeps:
+ * - A circular list of ready (connected) subchannels, the *readylist*. An empty
+ *   readylist consists solely of its root (dummy) node.
+ * - A pointer to the last element picked from the readylist, the *lastpick*.
+ *   Initially set to point to the readylist's root.
+ *
+ * Behavior:
+ * - When a subchannel connects, it's *prepended* to the readylist's root node.
+ *   Ie, if readylist = A <-> B <-> ROOT <-> C
+ *                      ^                    ^
+ *                      |____________________|
+ *   and subchannel D becomes connected, the addition of D to the readylist
+ *   results in  readylist = A <-> B <-> D <-> ROOT <-> C
+ *                           ^                          ^
+ *                           |__________________________|
+ * - When a subchannel disconnects, it's removed from the readylist. If the
+ *   subchannel being removed was the most recently picked, the *lastpick*
+ *   pointer moves to the removed node's previous element. Note that if the
+ *   readylist only had one element, this is still legal, as the lastpick would
+ *   point to the dummy root node, for an empty readylist.
+ * - Upon picking, *lastpick* is updated to point to the returned (connected)
+ *   subchannel. Note that it's possible that the selected subchannel becomes
+ *   disconnected in the interim between the selection and the actual usage of
+ *   the subchannel by the caller.
+ */
+
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -173,9 +201,7 @@
     return;
   }
   if (node == p->ready_list_last_pick) {
-    /* If removing the lastly picked node, reset the last pick pointer to the
-     * dummy root of the list */
-    p->ready_list_last_pick = &p->ready_list;
+    p->ready_list_last_pick = p->ready_list_last_pick->prev;
   }
 
   /* removing last item */
@@ -345,8 +371,8 @@
     *target = grpc_subchannel_get_connected_subchannel(selected->subchannel);
     if (grpc_lb_round_robin_trace) {
       gpr_log(GPR_DEBUG,
-              "[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)",
-              selected->subchannel, selected);
+              "[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)", *target,
+              selected);
     }
     /* only advance the last picked pointer if the selection was used */
     advance_last_picked_locked(p);
@@ -526,7 +552,7 @@
 
 static void round_robin_factory_unref(grpc_lb_policy_factory *factory) {}
 
-static grpc_lb_policy *create_round_robin(grpc_exec_ctx *exec_ctx,
+static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
                                           grpc_lb_policy_factory *factory,
                                           grpc_lb_policy_args *args) {
   GPR_ASSERT(args->addresses != NULL);
@@ -582,7 +608,7 @@
 }
 
 static const grpc_lb_policy_factory_vtable round_robin_factory_vtable = {
-    round_robin_factory_ref, round_robin_factory_unref, create_round_robin,
+    round_robin_factory_ref, round_robin_factory_unref, round_robin_create,
     "round_robin"};
 
 static grpc_lb_policy_factory round_robin_lb_policy_factory = {
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
new file mode 100644
index 0000000..ca435c2
--- /dev/null
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
@@ -0,0 +1,95 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+#include <fcntl.h>
+
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/transport/transport.h"
+
+grpc_channel *grpc_insecure_channel_create_from_fd(
+    const char *target, int fd, const grpc_channel_args *args) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_API_TRACE("grpc_insecure_channel_create(target=%p, fd=%d, args=%p)", 3,
+                 (target, fd, args));
+
+  grpc_arg default_authority_arg;
+  default_authority_arg.type = GRPC_ARG_STRING;
+  default_authority_arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
+  default_authority_arg.value.string = "test.authority";
+  grpc_channel_args *final_args =
+      grpc_channel_args_copy_and_add(args, &default_authority_arg, 1);
+
+  int flags = fcntl(fd, F_GETFL, 0);
+  GPR_ASSERT(fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0);
+
+  grpc_endpoint *client =
+      grpc_tcp_create(grpc_fd_create(fd, "client"),
+                      GRPC_TCP_DEFAULT_READ_SLICE_SIZE, "fd-client");
+
+  grpc_transport *transport =
+      grpc_create_chttp2_transport(&exec_ctx, final_args, client, 1);
+  GPR_ASSERT(transport);
+  grpc_channel *channel = grpc_channel_create(
+      &exec_ctx, target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  grpc_channel_args_destroy(final_args);
+  grpc_chttp2_transport_start_reading(&exec_ctx, transport, NULL, 0);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  return channel != NULL ? channel : grpc_lame_client_channel_create(
+                                         target, GRPC_STATUS_INTERNAL,
+                                         "Failed to create client channel");
+}
+
+#else  // !GPR_SUPPORT_CHANNELS_FROM_FD
+
+grpc_channel *grpc_insecure_channel_create_from_fd(
+    const char *target, int fd, const grpc_channel_args *args) {
+  GPR_ASSERT(0);
+  return NULL;
+}
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c
new file mode 100644
index 0000000..96bf4d6
--- /dev/null
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/surface/completion_queue.h"
+#include "src/core/lib/surface/server.h"
+
+void grpc_server_add_insecure_channel_from_fd(grpc_server *server,
+                                              grpc_completion_queue *cq,
+                                              int fd) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+  char *name;
+  gpr_asprintf(&name, "fd:%d", fd);
+
+  grpc_endpoint *server_endpoint = grpc_tcp_create(
+      grpc_fd_create(fd, name), GRPC_TCP_DEFAULT_READ_SLICE_SIZE, name);
+
+  gpr_free(name);
+
+  const grpc_channel_args *server_args = grpc_server_get_channel_args(server);
+  grpc_transport *transport = grpc_create_chttp2_transport(
+      &exec_ctx, server_args, server_endpoint, 0 /* is_client */);
+  grpc_endpoint_add_to_pollset(&exec_ctx, server_endpoint, grpc_cq_pollset(cq));
+  grpc_server_setup_transport(&exec_ctx, server, transport, NULL, server_args);
+  grpc_chttp2_transport_start_reading(&exec_ctx, transport, NULL, 0);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+#else  // !GPR_SUPPORT_CHANNELS_FROM_FD
+
+void grpc_server_add_insecure_channel_from_fd(grpc_server *server,
+                                              grpc_completion_queue *cq,
+                                              int fd) {
+  GPR_ASSERT(0);
+}
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 046b395..a62bb61 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -47,6 +47,7 @@
 #include "src/core/ext/transport/chttp2/transport/internal.h"
 #include "src/core/ext/transport/chttp2/transport/status_conversion.h"
 #include "src/core/ext/transport/chttp2/transport/timeout_encoding.h"
+#include "src/core/lib/http/parser.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/static_metadata.h"
@@ -107,7 +108,8 @@
 static void cancel_from_api(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_global *transport_global,
                             grpc_chttp2_stream_global *stream_global,
-                            grpc_status_code status);
+                            grpc_status_code status,
+                            gpr_slice *optional_message);
 
 static void close_from_api(grpc_exec_ctx *exec_ctx,
                            grpc_chttp2_transport_global *transport_global,
@@ -161,6 +163,8 @@
 
   GPR_ASSERT(t->ep == NULL);
 
+  gpr_slice_unref(t->optional_drop_message);
+
   gpr_slice_buffer_destroy(&t->global.qbuf);
 
   gpr_slice_buffer_destroy(&t->writing.outbuf);
@@ -260,6 +264,7 @@
   t->parsing.deframe_state =
       is_client ? GRPC_DTS_FH_0 : GRPC_DTS_CLIENT_PREFIX_0;
   t->writing.is_client = is_client;
+  t->optional_drop_message = gpr_empty_slice();
   grpc_connectivity_state_init(
       &t->channel_callback.state_tracker, GRPC_CHANNEL_READY,
       is_client ? "client_transport" : "server_transport");
@@ -859,7 +864,7 @@
          grpc_chttp2_list_pop_waiting_for_concurrency(transport_global,
                                                       &stream_global)) {
     cancel_from_api(exec_ctx, transport_global, stream_global,
-                    GRPC_STATUS_UNAVAILABLE);
+                    GRPC_STATUS_UNAVAILABLE, NULL);
   }
 }
 
@@ -936,7 +941,7 @@
 
   if (op->cancel_with_status != GRPC_STATUS_OK) {
     cancel_from_api(exec_ctx, transport_global, stream_global,
-                    op->cancel_with_status);
+                    op->cancel_with_status, op->optional_close_message);
   }
 
   if (op->close_with_status != GRPC_STATUS_OK) {
@@ -960,7 +965,7 @@
               "(%lu vs. %lu)",
               metadata_size, metadata_peer_limit);
       cancel_from_api(exec_ctx, transport_global, stream_global,
-                      GRPC_STATUS_RESOURCE_EXHAUSTED);
+                      GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
     } else {
       if (contains_non_ok_status(transport_global, op->send_initial_metadata)) {
         stream_global->seen_error = true;
@@ -1015,7 +1020,7 @@
               "(%lu vs. %lu)",
               metadata_size, metadata_peer_limit);
       cancel_from_api(exec_ctx, transport_global, stream_global,
-                      GRPC_STATUS_RESOURCE_EXHAUSTED);
+                      GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
     } else {
       if (contains_non_ok_status(transport_global,
                                  op->send_trailing_metadata)) {
@@ -1201,7 +1206,7 @@
         }
         if (stream_global->exceeded_metadata_size) {
           cancel_from_api(exec_ctx, transport_global, stream_global,
-                          GRPC_STATUS_RESOURCE_EXHAUSTED);
+                          GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
         }
       }
       grpc_chttp2_incoming_metadata_buffer_publish(
@@ -1240,7 +1245,7 @@
         }
         if (stream_global->exceeded_metadata_size) {
           cancel_from_api(exec_ctx, transport_global, stream_global,
-                          GRPC_STATUS_RESOURCE_EXHAUSTED);
+                          GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
         }
       }
       if (stream_global->all_incoming_byte_streams_finished) {
@@ -1303,7 +1308,8 @@
 static void cancel_from_api(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_global *transport_global,
                             grpc_chttp2_stream_global *stream_global,
-                            grpc_status_code status) {
+                            grpc_status_code status,
+                            gpr_slice *optional_message) {
   if (!stream_global->read_closed || !stream_global->write_closed) {
     if (stream_global->id != 0) {
       gpr_slice_buffer_add(
@@ -1313,8 +1319,12 @@
               (uint32_t)grpc_chttp2_grpc_status_to_http2_error(status),
               &stream_global->stats.outgoing));
     }
+
+    if (optional_message) {
+      gpr_slice_ref(*optional_message);
+    }
     grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global, status,
-                            NULL);
+                            optional_message);
   }
   if (status != GRPC_STATUS_OK && !stream_global->seen_error) {
     stream_global->seen_error = true;
@@ -1524,8 +1534,12 @@
 static void cancel_stream_cb(grpc_chttp2_transport_global *transport_global,
                              void *user_data,
                              grpc_chttp2_stream_global *stream_global) {
+  grpc_chttp2_transport *transport = TRANSPORT_FROM_GLOBAL(transport_global);
   cancel_from_api(user_data, transport_global, stream_global,
-                  GRPC_STATUS_UNAVAILABLE);
+                  GRPC_STATUS_UNAVAILABLE,
+                  GPR_SLICE_IS_EMPTY(transport->optional_drop_message)
+                      ? NULL
+                      : &transport->optional_drop_message);
 }
 
 static void end_all_the_calls(grpc_exec_ctx *exec_ctx,
@@ -1601,6 +1615,29 @@
   }
 }
 
+static bool try_http_parsing(grpc_exec_ctx *exec_ctx,
+                             grpc_chttp2_transport *t) {
+  grpc_http_parser parser;
+  size_t i = 0;
+  bool success = false;
+
+  grpc_http_parser_init(&parser);
+
+  for (; i < t->read_buffer.count &&
+         grpc_http_parser_parse(&parser, t->read_buffer.slices[i]);
+       i++)
+    ;
+  if (grpc_http_parser_eof(&parser) && parser.type == GRPC_HTTP_RESPONSE) {
+    success = true;
+    GRPC_CHTTP2_IF_TRACING(gpr_log(
+        GPR_DEBUG, "Trying to connect an http1.x server, received status:%d",
+        parser.http.response.status));
+  }
+
+  grpc_http_parser_destroy(&parser);
+  return success;
+}
+
 static void parsing_action(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_chttp2_transport *t = arg;
   GPR_TIMER_BEGIN("reading_action.parse", 0);
@@ -1612,6 +1649,14 @@
     ;
   if (i != t->read_buffer.count) {
     success = false;
+    gpr_slice_unref(t->optional_drop_message);
+    if (try_http_parsing(exec_ctx, t)) {
+      t->optional_drop_message = gpr_slice_from_copied_string(
+          "Connection dropped: received http1.x response");
+    } else {
+      t->optional_drop_message = gpr_slice_from_copied_string(
+          "Connection dropped: received unparseable response");
+    }
   }
   GPR_TIMER_END("reading_action.parse", 0);
   grpc_chttp2_run_with_global_lock(exec_ctx, t, NULL, post_parse_locked,
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 5872fd8..7f3339a 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -383,6 +383,9 @@
 
   /** Transport op to be applied post-parsing */
   grpc_transport_op *post_parsing_op;
+
+  /** Message explaining the reason of dropping connection */
+  gpr_slice optional_drop_message;
 };
 
 typedef struct {
diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 569be4d..d53ce90 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -35,6 +35,7 @@
 #include <grpc/grpc.h>
 #include "src/core/lib/support/string.h"
 
+#include <grpc/compression.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -181,6 +182,7 @@
 
 grpc_channel_args *grpc_channel_args_set_compression_algorithm(
     grpc_channel_args *a, grpc_compression_algorithm algorithm) {
+  GPR_ASSERT(algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT);
   grpc_arg tmp;
   tmp.type = GRPC_ARG_INTEGER;
   tmp.key = GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM;
@@ -200,7 +202,8 @@
           !strcmp(GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
                   a->args[i].key)) {
         *states_arg = &a->args[i].value.integer;
-        return 1; /* GPR_TRUE */
+        **states_arg |= 0x1; /* forcefully enable support for no compression */
+        return 1;
       }
     }
   }
@@ -214,10 +217,18 @@
   const int states_arg_found =
       find_compression_algorithm_states_bitset(*a, &states_arg);
 
-  if (states_arg_found) {
+  if (grpc_channel_args_get_compression_algorithm(*a) == algorithm &&
+      state == 0) {
+    char *algo_name = NULL;
+    GPR_ASSERT(grpc_compression_algorithm_name(algorithm, &algo_name) != 0);
+    gpr_log(GPR_ERROR,
+            "Tried to disable default compression algorithm '%s'. The "
+            "operation has been ignored.",
+            algo_name);
+  } else if (states_arg_found) {
     if (state != 0) {
       GPR_BITSET((unsigned *)states_arg, algorithm);
-    } else {
+    } else if (algorithm != GRPC_COMPRESS_NONE) {
       GPR_BITCLEAR((unsigned *)states_arg, algorithm);
     }
   } else {
@@ -229,7 +240,7 @@
     tmp.value.integer = (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
     if (state != 0) {
       GPR_BITSET((unsigned *)&tmp.value.integer, algorithm);
-    } else {
+    } else if (algorithm != GRPC_COMPRESS_NONE) {
       GPR_BITCLEAR((unsigned *)&tmp.value.integer, algorithm);
     }
     result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
@@ -239,11 +250,11 @@
   return result;
 }
 
-int grpc_channel_args_compression_algorithm_get_states(
+uint32_t grpc_channel_args_compression_algorithm_get_states(
     const grpc_channel_args *a) {
   int *states_arg;
   if (find_compression_algorithm_states_bitset(a, &states_arg)) {
-    return *states_arg;
+    return (uint32_t)*states_arg;
   } else {
     return (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1; /* All algs. enabled */
   }
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index 23c7b7b..653d04f 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -81,7 +81,7 @@
  *
  * The i-th bit of the returned bitset corresponds to the i-th entry in the
  * grpc_compression_algorithm enum. */
-int grpc_channel_args_compression_algorithm_get_states(
+uint32_t grpc_channel_args_compression_algorithm_get_states(
     const grpc_channel_args *a);
 
 int grpc_channel_args_compare(const grpc_channel_args *a,
diff --git a/src/core/lib/channel/compress_filter.c b/src/core/lib/channel/compress_filter.c
index 7c8c1d6..4fe9a7f 100644
--- a/src/core/lib/channel/compress_filter.c
+++ b/src/core/lib/channel/compress_filter.c
@@ -73,8 +73,8 @@
 typedef struct channel_data {
   /** The default, channel-level, compression algorithm */
   grpc_compression_algorithm default_compression_algorithm;
-  /** Compression options for the channel */
-  grpc_compression_options compression_options;
+  /** Bitset of enabled algorithms */
+  uint32_t enabled_algorithms_bitset;
   /** Supported compression algorithms */
   uint32_t supported_compression_algorithms;
 } channel_data;
@@ -96,9 +96,8 @@
               md_c_str);
       calld->compression_algorithm = GRPC_COMPRESS_NONE;
     }
-    if (grpc_compression_options_is_algorithm_enabled(
-            &channeld->compression_options, calld->compression_algorithm) ==
-        0) {
+    if (!GPR_BITGET(channeld->enabled_algorithms_bitset,
+                    calld->compression_algorithm)) {
       gpr_log(GPR_ERROR,
               "Invalid compression algorithm: '%s' (previously disabled). "
               "Ignoring.",
@@ -282,32 +281,26 @@
                               grpc_channel_element *elem,
                               grpc_channel_element_args *args) {
   channel_data *channeld = elem->channel_data;
-  grpc_compression_algorithm algo_idx;
 
-  grpc_compression_options_init(&channeld->compression_options);
-  channeld->compression_options.enabled_algorithms_bitset =
-      (uint32_t)grpc_channel_args_compression_algorithm_get_states(
-          args->channel_args);
+  channeld->enabled_algorithms_bitset =
+      grpc_channel_args_compression_algorithm_get_states(args->channel_args);
 
   channeld->default_compression_algorithm =
       grpc_channel_args_get_compression_algorithm(args->channel_args);
   /* Make sure the default isn't disabled. */
-  if (!grpc_compression_options_is_algorithm_enabled(
-          &channeld->compression_options,
-          channeld->default_compression_algorithm)) {
+  if (!GPR_BITGET(channeld->enabled_algorithms_bitset,
+                  channeld->default_compression_algorithm)) {
     gpr_log(GPR_DEBUG,
             "compression algorithm %d not enabled: switching to none",
             channeld->default_compression_algorithm);
     channeld->default_compression_algorithm = GRPC_COMPRESS_NONE;
   }
-  channeld->compression_options.default_compression_algorithm =
-      channeld->default_compression_algorithm;
 
-  channeld->supported_compression_algorithms = 0;
-  for (algo_idx = 0; algo_idx < GRPC_COMPRESS_ALGORITHMS_COUNT; ++algo_idx) {
+  channeld->supported_compression_algorithms = 1; /* always support identity */
+  for (grpc_compression_algorithm algo_idx = 1;
+       algo_idx < GRPC_COMPRESS_ALGORITHMS_COUNT; ++algo_idx) {
     /* skip disabled algorithms */
-    if (grpc_compression_options_is_algorithm_enabled(
-            &channeld->compression_options, algo_idx) == 0) {
+    if (!GPR_BITGET(channeld->enabled_algorithms_bitset, algo_idx)) {
       continue;
     }
     channeld->supported_compression_algorithms |= 1u << algo_idx;
diff --git a/src/core/lib/channel/compress_filter.h b/src/core/lib/channel/compress_filter.h
index 0ce5d08..e4a2a82 100644
--- a/src/core/lib/channel/compress_filter.h
+++ b/src/core/lib/channel/compress_filter.h
@@ -34,9 +34,9 @@
 #ifndef GRPC_CORE_LIB_CHANNEL_COMPRESS_FILTER_H
 #define GRPC_CORE_LIB_CHANNEL_COMPRESS_FILTER_H
 
-#include "src/core/lib/channel/channel_stack.h"
+#include <grpc/impl/codegen/compression_types.h>
 
-#define GRPC_COMPRESS_REQUEST_ALGORITHM_KEY "grpc-internal-encoding-request"
+#include "src/core/lib/channel/channel_stack.h"
 
 extern int grpc_compression_trace;
 
@@ -48,7 +48,7 @@
  *  - Channel configuration, as established at channel creation time.
  *  - The metadata accompanying the outgoing data to be compressed. This is
  *    taken as a request only. We may choose not to honor it. The metadata key
- *    is given by \a GRPC_COMPRESS_REQUEST_ALGORITHM_KEY.
+ *    is given by \a GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY.
  *
  * Compression can be disabled for concrete messages (for instance in order to
  * prevent CRIME/BEAST type attacks) by having the GRPC_WRITE_NO_COMPRESS set in
diff --git a/src/core/lib/compression/compression_algorithm.c b/src/core/lib/compression/compression.c
similarity index 97%
rename from src/core/lib/compression/compression_algorithm.c
rename to src/core/lib/compression/compression.c
index 820871d..54efb5e 100644
--- a/src/core/lib/compression/compression_algorithm.c
+++ b/src/core/lib/compression/compression.c
@@ -125,6 +125,28 @@
   return NULL;
 }
 
+void grpc_compression_options_init(grpc_compression_options *opts) {
+  memset(opts, 0, sizeof(*opts));
+  /* all enabled by default */
+  opts->enabled_algorithms_bitset = (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
+}
+
+void grpc_compression_options_enable_algorithm(
+    grpc_compression_options *opts, grpc_compression_algorithm algorithm) {
+  GPR_BITSET(&opts->enabled_algorithms_bitset, algorithm);
+}
+
+void grpc_compression_options_disable_algorithm(
+    grpc_compression_options *opts, grpc_compression_algorithm algorithm) {
+  GPR_BITCLEAR(&opts->enabled_algorithms_bitset, algorithm);
+}
+
+int grpc_compression_options_is_algorithm_enabled(
+    const grpc_compression_options *opts,
+    grpc_compression_algorithm algorithm) {
+  return GPR_BITGET(opts->enabled_algorithms_bitset, algorithm);
+}
+
 /* TODO(dgq): Add the ability to specify parameters to the individual
  * compression algorithms */
 grpc_compression_algorithm grpc_compression_algorithm_for_level(
@@ -180,25 +202,3 @@
       abort();
   };
 }
-
-void grpc_compression_options_init(grpc_compression_options *opts) {
-  opts->enabled_algorithms_bitset = (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
-  opts->default_compression_algorithm = GRPC_COMPRESS_NONE;
-}
-
-void grpc_compression_options_enable_algorithm(
-    grpc_compression_options *opts, grpc_compression_algorithm algorithm) {
-  GPR_BITSET(&opts->enabled_algorithms_bitset, algorithm);
-}
-
-void grpc_compression_options_disable_algorithm(
-    grpc_compression_options *opts, grpc_compression_algorithm algorithm) {
-  GPR_BITCLEAR(&opts->enabled_algorithms_bitset, algorithm);
-}
-
-int grpc_compression_options_is_algorithm_enabled(
-    const grpc_compression_options *opts,
-    grpc_compression_algorithm algorithm) {
-  if (algorithm >= GRPC_COMPRESS_ALGORITHMS_COUNT) return 0;
-  return GPR_BITGET(opts->enabled_algorithms_bitset, algorithm);
-}
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
index fa83cee..2147c86 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.c
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -111,6 +111,16 @@
 #endif
 }
 
+int grpc_set_socket_sndbuf(int fd, int buffer_size_bytes) {
+  return 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buffer_size_bytes,
+                         sizeof(buffer_size_bytes));
+}
+
+int grpc_set_socket_rcvbuf(int fd, int buffer_size_bytes) {
+  return 0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &buffer_size_bytes,
+                         sizeof(buffer_size_bytes));
+}
+
 /* set a socket to close on exec */
 int grpc_set_socket_cloexec(int fd, int close_on_exec) {
   int oldflags = fcntl(fd, F_GETFD, 0);
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
index a8f6e5e..7e41d1c 100644
--- a/src/core/lib/iomgr/socket_utils_posix.h
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -78,6 +78,14 @@
    If IPV6_RECVPKTINFO is not available, returns 1. */
 int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd);
 
+/* Tries to set the socket's send buffer to given size.
+   Returns 1 on success, 0 on failure. */
+int grpc_set_socket_sndbuf(int fd, int buffer_size_bytes);
+
+/* Tries to set the socket's receive buffer to given size.
+   Returns 1 on success, 0 on failure. */
+int grpc_set_socket_rcvbuf(int fd, int buffer_size_bytes);
+
 /* An enum to keep track of IPv4/IPv6 socket modes.
 
    Currently, this information is only used when a socket is first created, but
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 98ffccd..1615068 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -210,6 +210,8 @@
                           size_t addr_len) {
   struct sockaddr_storage sockname_temp;
   socklen_t sockname_len;
+  /* Set send/receive socket buffers to 1 MB */
+  int buffer_size_bytes = 1024 * 1024;
 
   if (fd < 0) {
     goto error;
@@ -239,6 +241,18 @@
     goto error;
   }
 
+  if (!grpc_set_socket_sndbuf(fd, buffer_size_bytes)) {
+    gpr_log(GPR_ERROR, "Failed to set send buffer size to %d bytes",
+            buf_size_bytes);
+    goto error;
+  }
+
+  if (!grpc_set_socket_rcvbuf(fd, buffer_size_bytes)) {
+    gpr_log(GPR_ERROR, "Failed to set receive buffer size to %d bytes",
+            buf_size_bytes);
+    goto error;
+  }
+
   return grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
 
 error:
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index e899bc8..a9b1e25 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -40,6 +40,7 @@
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/slice.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
@@ -52,7 +53,9 @@
 #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/metadata.h"
 #include "src/core/lib/transport/static_metadata.h"
+#include "src/core/lib/transport/transport.h"
 
 /** The maximum number of concurrent batches possible.
     Based upon the maximum number of individually queueable ops in the batch
@@ -154,8 +157,8 @@
   /* Call stats: only valid after trailing metadata received */
   grpc_call_stats stats;
 
-  /* Compression algorithm for the call */
-  grpc_compression_algorithm compression_algorithm;
+  /* Compression algorithm for *incoming* data */
+  grpc_compression_algorithm incoming_compression_algorithm;
   /* Supported encodings (compression algorithms), a bitset */
   uint32_t encodings_accepted_by_peer;
 
@@ -214,6 +217,9 @@
 static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
                                           grpc_status_code status,
                                           const char *description);
+static grpc_call_error close_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
+                                         grpc_status_code status,
+                                         const char *description);
 static void destroy_call(grpc_exec_ctx *exec_ctx, void *call_stack,
                          bool success);
 static void receiving_slice_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
@@ -399,21 +405,27 @@
   /* TODO(ctiller): what to do about the flush that was previously here */
 }
 
-static void set_compression_algorithm(grpc_call *call,
-                                      grpc_compression_algorithm algo) {
+static void set_incoming_compression_algorithm(
+    grpc_call *call, grpc_compression_algorithm algo) {
   GPR_ASSERT(algo < GRPC_COMPRESS_ALGORITHMS_COUNT);
-  call->compression_algorithm = algo;
+  call->incoming_compression_algorithm = algo;
 }
 
 grpc_compression_algorithm grpc_call_test_only_get_compression_algorithm(
     grpc_call *call) {
   grpc_compression_algorithm algorithm;
   gpr_mu_lock(&call->mu);
-  algorithm = call->compression_algorithm;
+  algorithm = call->incoming_compression_algorithm;
   gpr_mu_unlock(&call->mu);
   return algorithm;
 }
 
+static grpc_compression_algorithm compression_algorithm_for_level_locked(
+    grpc_call *call, grpc_compression_level level) {
+  return grpc_compression_algorithm_for_level(level,
+                                              call->encodings_accepted_by_peer);
+}
+
 uint32_t grpc_call_test_only_get_message_flags(grpc_call *call) {
   uint32_t flags;
   gpr_mu_lock(&call->mu);
@@ -539,15 +551,28 @@
   return (grpc_linked_mdelem *)&md->internal_data;
 }
 
+static grpc_metadata *get_md_elem(grpc_metadata *metadata,
+                                  grpc_metadata *additional_metadata, int i,
+                                  int count) {
+  grpc_metadata *res =
+      i < count ? &metadata[i] : &additional_metadata[i - count];
+  GPR_ASSERT(res);
+  return res;
+}
+
 static int prepare_application_metadata(grpc_call *call, int count,
                                         grpc_metadata *metadata,
                                         int is_trailing,
-                                        int prepend_extra_metadata) {
+                                        int prepend_extra_metadata,
+                                        grpc_metadata *additional_metadata,
+                                        int additional_metadata_count) {
+  int total_count = count + additional_metadata_count;
   int i;
   grpc_metadata_batch *batch =
       &call->metadata_batch[0 /* is_receiving */][is_trailing];
-  for (i = 0; i < count; i++) {
-    grpc_metadata *md = &metadata[i];
+  for (i = 0; i < total_count; i++) {
+    const grpc_metadata *md =
+        get_md_elem(metadata, additional_metadata, i, count);
     grpc_linked_mdelem *l = (grpc_linked_mdelem *)&md->internal_data;
     GPR_ASSERT(sizeof(grpc_linked_mdelem) == sizeof(md->internal_data));
     l->md = grpc_mdelem_from_string_and_buffer(
@@ -566,9 +591,10 @@
       break;
     }
   }
-  if (i != count) {
+  if (i != total_count) {
     for (int j = 0; j <= i; j++) {
-      grpc_metadata *md = &metadata[j];
+      const grpc_metadata *md =
+          get_md_elem(metadata, additional_metadata, j, count);
       grpc_linked_mdelem *l = (grpc_linked_mdelem *)&md->internal_data;
       GRPC_MDELEM_UNREF(l->md);
     }
@@ -589,24 +615,36 @@
       }
     }
   }
-  for (i = 1; i < count; i++) {
-    linked_from_md(&metadata[i])->prev = linked_from_md(&metadata[i - 1]);
+  for (i = 1; i < total_count; i++) {
+    grpc_metadata *md = get_md_elem(metadata, additional_metadata, i, count);
+    grpc_metadata *prev_md =
+        get_md_elem(metadata, additional_metadata, i - 1, count);
+    linked_from_md(md)->prev = linked_from_md(prev_md);
   }
-  for (i = 0; i < count - 1; i++) {
-    linked_from_md(&metadata[i])->next = linked_from_md(&metadata[i + 1]);
+  for (i = 0; i < total_count - 1; i++) {
+    grpc_metadata *md = get_md_elem(metadata, additional_metadata, i, count);
+    grpc_metadata *next_md =
+        get_md_elem(metadata, additional_metadata, i + 1, count);
+    linked_from_md(md)->next = linked_from_md(next_md);
   }
-  switch (prepend_extra_metadata * 2 + (count != 0)) {
+
+  switch (prepend_extra_metadata * 2 + (total_count != 0)) {
     case 0:
       /* no prepend, no metadata => nothing to do */
       batch->list.head = batch->list.tail = NULL;
       break;
-    case 1:
+    case 1: {
       /* metadata, but no prepend */
-      batch->list.head = linked_from_md(&metadata[0]);
-      batch->list.tail = linked_from_md(&metadata[count - 1]);
+      grpc_metadata *first_md =
+          get_md_elem(metadata, additional_metadata, 0, count);
+      grpc_metadata *last_md =
+          get_md_elem(metadata, additional_metadata, total_count - 1, count);
+      batch->list.head = linked_from_md(first_md);
+      batch->list.tail = linked_from_md(last_md);
       batch->list.head->prev = NULL;
       batch->list.tail->next = NULL;
       break;
+    }
     case 2:
       /* prepend, but no md */
       batch->list.head = &call->send_extra_metadata[0];
@@ -615,17 +653,22 @@
       batch->list.head->prev = NULL;
       batch->list.tail->next = NULL;
       break;
-    case 3:
+    case 3: {
       /* prepend AND md */
+      grpc_metadata *first_md =
+          get_md_elem(metadata, additional_metadata, 0, count);
+      grpc_metadata *last_md =
+          get_md_elem(metadata, additional_metadata, total_count - 1, count);
       batch->list.head = &call->send_extra_metadata[0];
       call->send_extra_metadata[call->send_extra_metadata_count - 1].next =
-          linked_from_md(&metadata[0]);
-      linked_from_md(&metadata[0])->prev =
+          linked_from_md(first_md);
+      linked_from_md(first_md)->prev =
           &call->send_extra_metadata[call->send_extra_metadata_count - 1];
-      batch->list.tail = linked_from_md(&metadata[count - 1]);
+      batch->list.tail = linked_from_md(last_md);
       batch->list.head->prev = NULL;
       batch->list.tail->next = NULL;
       break;
+    }
     default:
       GPR_UNREACHABLE_CODE(return 0);
   }
@@ -694,48 +737,102 @@
   return r;
 }
 
-typedef struct cancel_closure {
+typedef struct termination_closure {
   grpc_closure closure;
   grpc_call *call;
   grpc_status_code status;
-} cancel_closure;
+  gpr_slice optional_message;
+  grpc_closure *op_closure;
+  enum { TC_CANCEL, TC_CLOSE } type;
+} termination_closure;
 
-static void done_cancel(grpc_exec_ctx *exec_ctx, void *ccp, bool success) {
-  cancel_closure *cc = ccp;
-  GRPC_CALL_INTERNAL_UNREF(exec_ctx, cc->call, "cancel");
-  gpr_free(cc);
+static void done_termination(grpc_exec_ctx *exec_ctx, void *tcp, bool success) {
+  termination_closure *tc = tcp;
+  if (tc->type == TC_CANCEL) {
+    GRPC_CALL_INTERNAL_UNREF(exec_ctx, tc->call, "cancel");
+  }
+  if (tc->type == TC_CLOSE) {
+    GRPC_CALL_INTERNAL_UNREF(exec_ctx, tc->call, "close");
+  }
+  gpr_slice_unref(tc->optional_message);
+  if (tc->op_closure != NULL) {
+    grpc_exec_ctx_enqueue(exec_ctx, tc->op_closure, true, NULL);
+  }
+  gpr_free(tc);
 }
 
-static void send_cancel(grpc_exec_ctx *exec_ctx, void *ccp, bool success) {
+static void send_cancel(grpc_exec_ctx *exec_ctx, void *tcp, bool success) {
   grpc_transport_stream_op op;
-  cancel_closure *cc = ccp;
+  termination_closure *tc = tcp;
   memset(&op, 0, sizeof(op));
-  op.cancel_with_status = cc->status;
+  op.cancel_with_status = tc->status;
   /* reuse closure to catch completion */
-  grpc_closure_init(&cc->closure, done_cancel, cc);
-  op.on_complete = &cc->closure;
-  execute_op(exec_ctx, cc->call, &op);
+  grpc_closure_init(&tc->closure, done_termination, tc);
+  op.on_complete = &tc->closure;
+  execute_op(exec_ctx, tc->call, &op);
+}
+
+static void send_close(grpc_exec_ctx *exec_ctx, void *tcp, bool success) {
+  grpc_transport_stream_op op;
+  termination_closure *tc = tcp;
+  memset(&op, 0, sizeof(op));
+  tc->optional_message = gpr_slice_ref(tc->optional_message);
+  grpc_transport_stream_op_add_close(&op, tc->status, &tc->optional_message);
+  /* reuse closure to catch completion */
+  grpc_closure_init(&tc->closure, done_termination, tc);
+  tc->op_closure = op.on_complete;
+  op.on_complete = &tc->closure;
+  execute_op(exec_ctx, tc->call, &op);
+}
+
+static grpc_call_error terminate_with_status(grpc_exec_ctx *exec_ctx,
+                                             termination_closure *tc) {
+  grpc_mdstr *details = NULL;
+  if (GPR_SLICE_LENGTH(tc->optional_message) > 0) {
+    tc->optional_message = gpr_slice_ref(tc->optional_message);
+    details = grpc_mdstr_from_slice(tc->optional_message);
+  }
+
+  set_status_code(tc->call, STATUS_FROM_API_OVERRIDE, (uint32_t)tc->status);
+  set_status_details(tc->call, STATUS_FROM_API_OVERRIDE, details);
+
+  if (tc->type == TC_CANCEL) {
+    grpc_closure_init(&tc->closure, send_cancel, tc);
+    GRPC_CALL_INTERNAL_REF(tc->call, "cancel");
+  } else if (tc->type == TC_CLOSE) {
+    grpc_closure_init(&tc->closure, send_close, tc);
+    GRPC_CALL_INTERNAL_REF(tc->call, "close");
+  }
+  grpc_exec_ctx_enqueue(exec_ctx, &tc->closure, true, NULL);
+  return GRPC_CALL_OK;
 }
 
 static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
                                           grpc_status_code status,
                                           const char *description) {
-  grpc_mdstr *details =
-      description ? grpc_mdstr_from_string(description) : NULL;
-  cancel_closure *cc = gpr_malloc(sizeof(*cc));
-
+  termination_closure *tc = gpr_malloc(sizeof(*tc));
+  memset(tc, 0, sizeof(termination_closure));
+  tc->type = TC_CANCEL;
+  tc->call = c;
+  tc->optional_message = gpr_slice_from_copied_string(description);
   GPR_ASSERT(status != GRPC_STATUS_OK);
+  tc->status = status;
 
-  set_status_code(c, STATUS_FROM_API_OVERRIDE, (uint32_t)status);
-  set_status_details(c, STATUS_FROM_API_OVERRIDE, details);
+  return terminate_with_status(exec_ctx, tc);
+}
 
-  grpc_closure_init(&cc->closure, send_cancel, cc);
-  cc->call = c;
-  cc->status = status;
-  GRPC_CALL_INTERNAL_REF(c, "cancel");
-  grpc_exec_ctx_enqueue(exec_ctx, &cc->closure, true, NULL);
+static grpc_call_error close_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
+                                         grpc_status_code status,
+                                         const char *description) {
+  termination_closure *tc = gpr_malloc(sizeof(*tc));
+  memset(tc, 0, sizeof(termination_closure));
+  tc->type = TC_CLOSE;
+  tc->call = c;
+  tc->optional_message = gpr_slice_from_copied_string(description);
+  GPR_ASSERT(status != GRPC_STATUS_OK);
+  tc->status = status;
 
-  return GRPC_CALL_OK;
+  return terminate_with_status(exec_ctx, tc);
 }
 
 static void execute_op(grpc_exec_ctx *exec_ctx, grpc_call *call,
@@ -876,9 +973,9 @@
   if (elem == NULL) {
     return NULL;
   } else if (elem->key == GRPC_MDSTR_GRPC_ENCODING) {
-    GPR_TIMER_BEGIN("compression_algorithm", 0);
-    set_compression_algorithm(call, decode_compression(elem));
-    GPR_TIMER_END("compression_algorithm", 0);
+    GPR_TIMER_BEGIN("incoming_compression_algorithm", 0);
+    set_incoming_compression_algorithm(call, decode_compression(elem));
+    GPR_TIMER_END("incoming_compression_algorithm", 0);
     return NULL;
   } else if (elem->key == GRPC_MDSTR_GRPC_ACCEPT_ENCODING) {
     GPR_TIMER_BEGIN("encodings_accepted_by_peer", 0);
@@ -1041,9 +1138,9 @@
   } else {
     call->test_only_last_message_flags = call->receiving_stream->flags;
     if ((call->receiving_stream->flags & GRPC_WRITE_INTERNAL_COMPRESS) &&
-        (call->compression_algorithm > GRPC_COMPRESS_NONE)) {
+        (call->incoming_compression_algorithm > GRPC_COMPRESS_NONE)) {
       *call->receiving_buffer = grpc_raw_compressed_byte_buffer_create(
-          NULL, 0, call->compression_algorithm);
+          NULL, 0, call->incoming_compression_algorithm);
     } else {
       *call->receiving_buffer = grpc_raw_byte_buffer_create(NULL, 0);
     }
@@ -1071,6 +1168,56 @@
   }
 }
 
+static void validate_filtered_metadata(grpc_exec_ctx *exec_ctx,
+                                       batch_control *bctl) {
+  grpc_call *call = bctl->call;
+  /* validate call->incoming_compression_algorithm */
+  if (call->incoming_compression_algorithm != GRPC_COMPRESS_NONE) {
+    const grpc_compression_algorithm algo =
+        call->incoming_compression_algorithm;
+    char *error_msg = NULL;
+    const grpc_compression_options compression_options =
+        grpc_channel_compression_options(call->channel);
+    /* check if algorithm is known */
+    if (algo >= GRPC_COMPRESS_ALGORITHMS_COUNT) {
+      gpr_asprintf(&error_msg, "Invalid compression algorithm value '%d'.",
+                   algo);
+      gpr_log(GPR_ERROR, error_msg);
+      close_with_status(exec_ctx, call, GRPC_STATUS_UNIMPLEMENTED, error_msg);
+    } else if (grpc_compression_options_is_algorithm_enabled(
+                   &compression_options, algo) == 0) {
+      /* check if algorithm is supported by current channel config */
+      char *algo_name;
+      grpc_compression_algorithm_name(algo, &algo_name);
+      gpr_asprintf(&error_msg, "Compression algorithm '%s' is disabled.",
+                   algo_name);
+      gpr_log(GPR_ERROR, error_msg);
+      close_with_status(exec_ctx, call, GRPC_STATUS_UNIMPLEMENTED, error_msg);
+    } else {
+      call->incoming_compression_algorithm = algo;
+    }
+    gpr_free(error_msg);
+  }
+
+  /* make sure the received grpc-encoding is amongst the ones listed in
+   * grpc-accept-encoding */
+  GPR_ASSERT(call->encodings_accepted_by_peer != 0);
+  if (!GPR_BITGET(call->encodings_accepted_by_peer,
+                  call->incoming_compression_algorithm)) {
+    extern int grpc_compression_trace;
+    if (grpc_compression_trace) {
+      char *algo_name;
+      grpc_compression_algorithm_name(call->incoming_compression_algorithm,
+                                      &algo_name);
+      gpr_log(GPR_ERROR,
+              "Compression algorithm (grpc-encoding = '%s') not present in "
+              "the bitset of accepted encodings (grpc-accept-encodings: "
+              "'0x%x')",
+              algo_name, call->encodings_accepted_by_peer);
+    }
+  }
+}
+
 static void receiving_initial_metadata_ready(grpc_exec_ctx *exec_ctx,
                                              void *bctlp, bool success) {
   batch_control *bctl = bctlp;
@@ -1085,24 +1232,10 @@
         &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
     grpc_metadata_batch_filter(md, recv_initial_filter, call);
 
-    /* make sure the received grpc-encoding is amongst the ones listed in
-     * grpc-accept-encoding */
+    GPR_TIMER_BEGIN("validate_filtered_metadata", 0);
+    validate_filtered_metadata(exec_ctx, bctl);
+    GPR_TIMER_END("validate_filtered_metadata", 0);
 
-    GPR_ASSERT(call->encodings_accepted_by_peer != 0);
-    if (!GPR_BITGET(call->encodings_accepted_by_peer,
-                    call->compression_algorithm)) {
-      extern int grpc_compression_trace;
-      if (grpc_compression_trace) {
-        char *algo_name;
-        grpc_compression_algorithm_name(call->compression_algorithm,
-                                        &algo_name);
-        gpr_log(GPR_ERROR,
-                "Compression algorithm (grpc-encoding = '%s') not present in "
-                "the bitset of accepted encodings (grpc-accept-encodings: "
-                "'0x%x')",
-                algo_name, call->encodings_accepted_by_peer);
-      }
-    }
     if (gpr_time_cmp(md->deadline, gpr_inf_future(md->deadline.clock_type)) !=
             0 &&
         !call->is_client) {
@@ -1245,7 +1378,40 @@
           error = GRPC_CALL_ERROR_TOO_MANY_OPERATIONS;
           goto done_with_error;
         }
-        if (op->data.send_initial_metadata.count > INT_MAX) {
+        /* process compression level */
+        grpc_metadata compression_md;
+        memset(&compression_md, 0, sizeof(grpc_metadata));
+        size_t additional_metadata_count = 0;
+        grpc_compression_level effective_compression_level;
+        bool level_set = false;
+        if (op->data.send_initial_metadata.maybe_compression_level.is_set) {
+          effective_compression_level =
+              op->data.send_initial_metadata.maybe_compression_level.level;
+          level_set = true;
+        } else {
+          const grpc_compression_options copts =
+              grpc_channel_compression_options(call->channel);
+          level_set = copts.default_level.is_set;
+          if (level_set) {
+            effective_compression_level = copts.default_level.level;
+          }
+        }
+        if (level_set && !call->is_client) {
+          const grpc_compression_algorithm calgo =
+              compression_algorithm_for_level_locked(
+                  call, effective_compression_level);
+          char *calgo_name;
+          grpc_compression_algorithm_name(calgo, &calgo_name);
+          // the following will be picked up by the compress filter and used as
+          // the call's compression algorithm.
+          compression_md.key = GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY;
+          compression_md.value = calgo_name;
+          compression_md.value_length = strlen(calgo_name);
+          additional_metadata_count++;
+        }
+
+        if (op->data.send_initial_metadata.count + additional_metadata_count >
+            INT_MAX) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
           goto done_with_error;
         }
@@ -1253,7 +1419,8 @@
         call->sent_initial_metadata = 1;
         if (!prepare_application_metadata(
                 call, (int)op->data.send_initial_metadata.count,
-                op->data.send_initial_metadata.metadata, 0, call->is_client)) {
+                op->data.send_initial_metadata.metadata, 0, call->is_client,
+                &compression_md, (int)additional_metadata_count)) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
           goto done_with_error;
         }
@@ -1341,7 +1508,8 @@
         if (!prepare_application_metadata(
                 call,
                 (int)op->data.send_status_from_server.trailing_metadata_count,
-                op->data.send_status_from_server.trailing_metadata, 1, 1)) {
+                op->data.send_status_from_server.trailing_metadata, 1, 1, NULL,
+                0)) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
           goto done_with_error;
         }
@@ -1530,9 +1698,10 @@
 grpc_compression_algorithm grpc_call_compression_for_level(
     grpc_call *call, grpc_compression_level level) {
   gpr_mu_lock(&call->mu);
-  const uint32_t accepted_encodings = call->encodings_accepted_by_peer;
+  grpc_compression_algorithm algo =
+      compression_algorithm_for_level_locked(call, level);
   gpr_mu_unlock(&call->mu);
-  return grpc_compression_algorithm_for_level(level, accepted_encodings);
+  return algo;
 }
 
 const char *grpc_call_error_to_string(grpc_call_error error) {
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index a7ea6fa..f0b3c2e 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -36,16 +36,17 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <grpc/compression.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/channel_init.h"
-#include "src/core/lib/surface/init.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 /** Cache grpc-status: X mdelems for X = 0..NUM_CACHED_STATUS_ELEMS.
@@ -64,10 +65,12 @@
 struct grpc_channel {
   int is_client;
   uint32_t max_message_length;
+  grpc_compression_options compression_options;
   grpc_mdelem *default_authority;
 
   gpr_mu registered_call_mu;
   registered_call *registered_calls;
+
   char *target;
 };
 
@@ -111,6 +114,7 @@
   channel->registered_calls = NULL;
 
   channel->max_message_length = DEFAULT_MAX_MESSAGE_LENGTH;
+  grpc_compression_options_init(&channel->compression_options);
   if (args) {
     for (size_t i = 0; i < args->num_args; i++) {
       if (0 == strcmp(args->args[i].key, GRPC_ARG_MAX_MESSAGE_LENGTH)) {
@@ -151,6 +155,27 @@
                 ":authority", args->args[i].value.string);
           }
         }
+      } else if (0 == strcmp(args->args[i].key,
+                             GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL)) {
+        channel->compression_options.default_level.is_set = true;
+        GPR_ASSERT(args->args[i].value.integer >= 0 &&
+                   args->args[i].value.integer < GRPC_COMPRESS_LEVEL_COUNT);
+        channel->compression_options.default_level.level =
+            (grpc_compression_level)args->args[i].value.integer;
+      } else if (0 == strcmp(args->args[i].key,
+                             GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM)) {
+        channel->compression_options.default_algorithm.is_set = true;
+        GPR_ASSERT(args->args[i].value.integer >= 0 &&
+                   args->args[i].value.integer <
+                       GRPC_COMPRESS_ALGORITHMS_COUNT);
+        channel->compression_options.default_algorithm.algorithm =
+            (grpc_compression_algorithm)args->args[i].value.integer;
+      } else if (0 ==
+                 strcmp(args->args[i].key,
+                        GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
+        channel->compression_options.enabled_algorithms_bitset =
+            (uint32_t)args->args[i].value.integer |
+            0x1; /* always support no compression */
       }
     }
     grpc_channel_args_destroy(args);
@@ -324,6 +349,11 @@
   return CHANNEL_STACK_FROM_CHANNEL(channel);
 }
 
+grpc_compression_options grpc_channel_compression_options(
+    const grpc_channel *channel) {
+  return channel->compression_options;
+}
+
 grpc_mdelem *grpc_channel_get_reffed_status_elem(grpc_channel *channel, int i) {
   char tmp[GPR_LTOA_MIN_BUFSIZE];
   switch (i) {
diff --git a/src/core/lib/surface/channel.h b/src/core/lib/surface/channel.h
index ff3debc..7eff7b8 100644
--- a/src/core/lib/surface/channel.h
+++ b/src/core/lib/surface/channel.h
@@ -76,4 +76,8 @@
   grpc_channel_internal_unref(exec_ctx, channel)
 #endif
 
+/** Return the channel's compression options. */
+grpc_compression_options grpc_channel_compression_options(
+    const grpc_channel *channel);
+
 #endif /* GRPC_CORE_LIB_SURFACE_CHANNEL_H */
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index 32c7794..d3e5ce0 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -33,15 +33,14 @@
 
 #include <grpc++/client_context.h>
 
-#include <grpc++/security/credentials.h>
-#include <grpc++/server_context.h>
-#include <grpc++/support/time.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 
-#include "src/core/lib/channel/compress_filter.h"
+#include <grpc++/security/credentials.h>
+#include <grpc++/server_context.h>
+#include <grpc++/support/time.h>
 
 namespace grpc {
 
@@ -112,7 +111,7 @@
     abort();
   }
   GPR_ASSERT(algorithm_name != nullptr);
-  AddMetadata(GRPC_COMPRESS_REQUEST_ALGORITHM_KEY, algorithm_name);
+  AddMetadata(GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY, algorithm_name);
 }
 
 void ClientContext::TryCancel() {
diff --git a/src/cpp/client/create_channel_posix.cc b/src/cpp/client/create_channel_posix.cc
new file mode 100644
index 0000000..60cfed3
--- /dev/null
+++ b/src/cpp/client/create_channel_posix.cc
@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/channel.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
+
+#include "src/cpp/client/create_channel_internal.h"
+
+namespace grpc {
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+std::shared_ptr<Channel> CreateInsecureChannelFromFd(const grpc::string& target,
+                                                     int fd) {
+  internal::GrpcLibrary init_lib;
+  init_lib.init();
+  return CreateChannelInternal(
+      "", grpc_insecure_channel_create_from_fd(target.c_str(), fd, nullptr));
+}
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
+
+}  // namespace grpc
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
index f6c3e57..50fc473 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server.cc
@@ -329,6 +329,10 @@
   g_callbacks.reset(callbacks);
 }
 
+grpc_server* Server::c_server() { return server_; }
+
+CompletionQueue* Server::completion_queue() { return &cq_; }
+
 static grpc_server_register_method_payload_handling PayloadHandlingForMethod(
     RpcServiceMethod* method) {
   switch (method->method_type()) {
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 54feac3..2799817 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -37,6 +37,8 @@
 #include <grpc++/server.h>
 #include <grpc/support/cpu.h>
 #include <grpc/support/log.h>
+
+#include "include/grpc/support/useful.h"
 #include "src/cpp/server/thread_pool_interface.h"
 
 namespace grpc {
@@ -52,12 +54,18 @@
 
 ServerBuilder::ServerBuilder()
     : max_message_size_(-1), generic_service_(nullptr) {
-  grpc_compression_options_init(&compression_options_);
   gpr_once_init(&once_init_plugin_list, do_plugin_list_init);
   for (auto factory : (*g_plugin_factory_list)) {
     std::unique_ptr<ServerBuilderPlugin> plugin = factory();
     plugins_[plugin->name()] = std::move(plugin);
   }
+  // all compression algorithms enabled by default.
+  enabled_compression_algorithms_bitset_ =
+      (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
+  memset(&maybe_default_compression_level_, 0,
+         sizeof(maybe_default_compression_level_));
+  memset(&maybe_default_compression_algorithm_, 0,
+         sizeof(maybe_default_compression_algorithm_));
 }
 
 std::unique_ptr<ServerCompletionQueue> ServerBuilder::AddCompletionQueue(
@@ -67,35 +75,65 @@
   return std::unique_ptr<ServerCompletionQueue>(cq);
 }
 
-void ServerBuilder::RegisterService(Service* service) {
+ServerBuilder& ServerBuilder::RegisterService(Service* service) {
   services_.emplace_back(new NamedService(service));
+  return *this;
 }
 
-void ServerBuilder::RegisterService(const grpc::string& addr,
-                                    Service* service) {
+ServerBuilder& ServerBuilder::RegisterService(const grpc::string& addr,
+                                              Service* service) {
   services_.emplace_back(new NamedService(addr, service));
+  return *this;
 }
 
-void ServerBuilder::RegisterAsyncGenericService(AsyncGenericService* service) {
+ServerBuilder& ServerBuilder::RegisterAsyncGenericService(
+    AsyncGenericService* service) {
   if (generic_service_) {
     gpr_log(GPR_ERROR,
             "Adding multiple AsyncGenericService is unsupported for now. "
             "Dropping the service %p",
             service);
-    return;
+  } else {
+    generic_service_ = service;
   }
-  generic_service_ = service;
+  return *this;
 }
 
-void ServerBuilder::SetOption(std::unique_ptr<ServerBuilderOption> option) {
+ServerBuilder& ServerBuilder::SetOption(
+    std::unique_ptr<ServerBuilderOption> option) {
   options_.push_back(std::move(option));
+  return *this;
 }
 
-void ServerBuilder::AddListeningPort(const grpc::string& addr,
-                                     std::shared_ptr<ServerCredentials> creds,
-                                     int* selected_port) {
+ServerBuilder& ServerBuilder::SetCompressionAlgorithmSupportStatus(
+    grpc_compression_algorithm algorithm, bool enabled) {
+  if (enabled) {
+    GPR_BITSET(&enabled_compression_algorithms_bitset_, algorithm);
+  } else {
+    GPR_BITCLEAR(&enabled_compression_algorithms_bitset_, algorithm);
+  }
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetDefaultCompressionLevel(
+    grpc_compression_level level) {
+  maybe_default_compression_level_.level = level;
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetDefaultCompressionAlgorithm(
+    grpc_compression_algorithm algorithm) {
+  maybe_default_compression_algorithm_.is_set = true;
+  maybe_default_compression_algorithm_.algorithm = algorithm;
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::AddListeningPort(
+    const grpc::string& addr, std::shared_ptr<ServerCredentials> creds,
+    int* selected_port) {
   Port port = {addr, creds, selected_port};
   ports_.push_back(port);
+  return *this;
 }
 
 std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
@@ -128,7 +166,15 @@
     args.SetInt(GRPC_ARG_MAX_MESSAGE_LENGTH, max_message_size_);
   }
   args.SetInt(GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
-              compression_options_.enabled_algorithms_bitset);
+              enabled_compression_algorithms_bitset_);
+  if (maybe_default_compression_level_.is_set) {
+    args.SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL,
+                maybe_default_compression_level_.level);
+  }
+  if (maybe_default_compression_algorithm_.is_set) {
+    args.SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
+                maybe_default_compression_algorithm_.algorithm);
+  }
   std::unique_ptr<Server> server(
       new Server(thread_pool.release(), true, max_message_size_, &args));
   ServerInitializer* initializer = server->initializer();
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index 204fef1..43117fd 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -42,7 +42,6 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
-#include "src/core/lib/channel/compress_filter.h"
 #include "src/core/lib/surface/call.h"
 
 namespace grpc {
@@ -196,6 +195,9 @@
 }
 
 void ServerContext::set_compression_level(grpc_compression_level level) {
+  // TODO(dgq): get rid of grpc_call_compression_for_level and propagate the
+  // compression level by adding a new argument to
+  // CallOpSendInitialMetadata::SendInitialMetadata.
   const grpc_compression_algorithm algorithm_for_level =
       grpc_call_compression_for_level(call_, level);
   set_compression_algorithm(algorithm_for_level);
@@ -210,7 +212,7 @@
     abort();
   }
   GPR_ASSERT(algorithm_name != NULL);
-  AddInitialMetadata(GRPC_COMPRESS_REQUEST_ALGORITHM_KEY, algorithm_name);
+  AddInitialMetadata(GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY, algorithm_name);
 }
 
 grpc::string ServerContext::peer() const {
diff --git a/src/cpp/server/server_posix.cc b/src/cpp/server/server_posix.cc
new file mode 100644
index 0000000..8cb9753
--- /dev/null
+++ b/src/cpp/server/server_posix.cc
@@ -0,0 +1,49 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/server_posix.h>
+
+#include <grpc/grpc_posix.h>
+
+namespace grpc {
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+void AddInsecureChannelFromFd(Server* server, int fd) {
+  grpc_server_add_insecure_channel_from_fd(
+      server->c_server(), server->completion_queue()->cq(), fd);
+
+#endif  // GPR_SUPPORT_CHANNELS_FROM_FD
+}
+
+}  // namespace grpc
diff --git a/src/csharp/Grpc.Core.Tests/ServerTest.cs b/src/csharp/Grpc.Core.Tests/ServerTest.cs
index fa69316..3b51aa6 100644
--- a/src/csharp/Grpc.Core.Tests/ServerTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ServerTest.cs
@@ -93,5 +93,20 @@
 
             server.ShutdownAsync().Wait();
         }
+
+        [Test]
+        public void UnstartedServerCanBeShutdown()
+        {
+            var server = new Server();
+            server.ShutdownAsync().Wait();
+            Assert.Throws(typeof(InvalidOperationException), () => server.Start());
+        }
+
+        [Test]
+        public void UnstartedServerDoesNotPreventShutdown()
+        {
+            // just create a server, don't start it, and make sure it doesn't prevent shutdown.
+            var server = new Server();
+        }
     }
 }
diff --git a/src/csharp/Grpc.Core/Server.cs b/src/csharp/Grpc.Core/Server.cs
index ae7a8c9..3b554e5 100644
--- a/src/csharp/Grpc.Core/Server.cs
+++ b/src/csharp/Grpc.Core/Server.cs
@@ -140,6 +140,7 @@
             lock (myLock)
             {
                 GrpcPreconditions.CheckState(!startRequested);
+                GrpcPreconditions.CheckState(!shutdownRequested);
                 startRequested = true;
                 
                 handle.Start();
@@ -203,7 +204,6 @@
         {
             lock (myLock)
             {
-                GrpcPreconditions.CheckState(startRequested);
                 GrpcPreconditions.CheckState(!shutdownRequested);
                 shutdownRequested = true;
             }
@@ -215,7 +215,6 @@
             {
                 handle.CancelAllCalls();
             }
-
             await ShutdownCompleteOrEnvironmentDeadAsync().ConfigureAwait(false);
 
             DisposeHandle();
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 2a243b9..4782654 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -503,6 +503,7 @@
                            grpc_metadata_array *initial_metadata, uint32_t write_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[6];
+  memset(ops, 0, sizeof(ops));
   ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   grpcsharp_metadata_array_move(&(ctx->send_initial_metadata),
                                 initial_metadata);
@@ -555,6 +556,7 @@
                                       grpc_metadata_array *initial_metadata) {
   /* TODO: don't use magic number */
   grpc_op ops[4];
+  memset(ops, 0, sizeof(ops));
   ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   grpcsharp_metadata_array_move(&(ctx->send_initial_metadata),
                                 initial_metadata);
@@ -596,6 +598,7 @@
     size_t send_buffer_len, grpc_metadata_array *initial_metadata, uint32_t write_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[4];
+  memset(ops, 0, sizeof(ops));
   ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   grpcsharp_metadata_array_move(&(ctx->send_initial_metadata),
                                 initial_metadata);
@@ -638,6 +641,7 @@
                                       grpc_metadata_array *initial_metadata) {
   /* TODO: don't use magic number */
   grpc_op ops[2];
+  memset(ops, 0, sizeof(ops));
   ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   grpcsharp_metadata_array_move(&(ctx->send_initial_metadata),
                                 initial_metadata);
@@ -684,6 +688,7 @@
                             int32_t send_empty_initial_metadata) {
   /* TODO: don't use magic number */
   grpc_op ops[2];
+  memset(ops, 0, sizeof(ops));
   size_t nops = send_empty_initial_metadata ? 2 : 1;
   ops[0].op = GRPC_OP_SEND_MESSAGE;
   ctx->send_message = string_to_byte_buffer(send_buffer, send_buffer_len);
@@ -691,8 +696,6 @@
   ops[0].flags = write_flags;
   ops[0].reserved = NULL;
   ops[1].op = GRPC_OP_SEND_INITIAL_METADATA;
-  ops[1].data.send_initial_metadata.count = 0;
-  ops[1].data.send_initial_metadata.metadata = NULL;
   ops[1].flags = 0;
   ops[1].reserved = NULL;
 
@@ -719,6 +722,7 @@
     size_t optional_send_buffer_len, uint32_t write_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[3];
+  memset(ops, 0, sizeof(ops));
   size_t nops = 1;
   ops[0].op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   ops[0].data.send_status_from_server.status = status_code;
@@ -743,8 +747,6 @@
   }
   if (send_empty_initial_metadata) {
     ops[nops].op = GRPC_OP_SEND_INITIAL_METADATA;
-    ops[nops].data.send_initial_metadata.count = 0;
-    ops[nops].data.send_initial_metadata.metadata = NULL;
     ops[nops].flags = 0;
     ops[nops].reserved = NULL;
     nops++;
@@ -784,6 +786,7 @@
                                      grpc_metadata_array *initial_metadata) {
   /* TODO: don't use magic number */
   grpc_op ops[1];
+  memset(ops, 0, sizeof(ops));
   ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   grpcsharp_metadata_array_move(&(ctx->send_initial_metadata),
                                 initial_metadata);
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index 16e5bff..a3fa593 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -72,6 +72,8 @@
     _op.op = GRPC_OP_SEND_INITIAL_METADATA;
     _op.data.send_initial_metadata.count = metadata.count;
     _op.data.send_initial_metadata.metadata = metadata.grpc_metadataArray;
+    _op.data.send_initial_metadata.maybe_compression_level.is_set = false;
+    _op.data.send_initial_metadata.maybe_compression_level.level = 0;
     _handler = handler;
   }
   return self;
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 884130e..0ec5022 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -292,6 +292,7 @@
   grpc_metadata_array_init(&recv_trailing_metadata);
   MAKE_STD_ZVAL(result);
   object_init(result);
+  memset(ops, 0, sizeof(ops));
   /* "a" == 1 array */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a", &array) ==
       FAILURE) {
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.c b/src/python/grpcio/grpc/_cython/imports.generated.c
index c80ee66..5c49f6c 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.c
+++ b/src/python/grpcio/grpc/_cython/imports.generated.c
@@ -126,6 +126,8 @@
 grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
 grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
+grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
+grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -397,6 +399,8 @@
   grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
   grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
+  grpc_insecure_channel_create_from_fd_import = (grpc_insecure_channel_create_from_fd_type) GetProcAddress(library, "grpc_insecure_channel_create_from_fd");
+  grpc_server_add_insecure_channel_from_fd_import = (grpc_server_add_insecure_channel_from_fd_type) GetProcAddress(library, "grpc_server_add_insecure_channel_from_fd");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index 7b8e98d..16bb5cd 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -43,6 +43,7 @@
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
 #include <grpc/grpc_security.h>
 #include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/byte_buffer.h>
@@ -328,6 +329,12 @@
 typedef const char *(*grpc_call_error_to_string_type)(grpc_call_error error);
 extern grpc_call_error_to_string_type grpc_call_error_to_string_import;
 #define grpc_call_error_to_string grpc_call_error_to_string_import
+typedef grpc_channel *(*grpc_insecure_channel_create_from_fd_type)(const char *target, int fd, const grpc_channel_args *args);
+extern grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
+#define grpc_insecure_channel_create_from_fd grpc_insecure_channel_create_from_fd_import
+typedef void(*grpc_server_add_insecure_channel_from_fd_type)(grpc_server *server, grpc_completion_queue *cq, int fd);
+extern grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
+#define grpc_server_add_insecure_channel_from_fd grpc_server_add_insecure_channel_from_fd_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index b83c82c..1a04021 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -84,7 +84,7 @@
   'src/core/lib/channel/connected_channel.c',
   'src/core/lib/channel/http_client_filter.c',
   'src/core/lib/channel/http_server_filter.c',
-  'src/core/lib/compression/compression_algorithm.c',
+  'src/core/lib/compression/compression.c',
   'src/core/lib/compression/message_compress.c',
   'src/core/lib/debug/trace.c',
   'src/core/lib/http/format_request.c',
@@ -231,7 +231,9 @@
   'src/core/ext/client_config/subchannel_index.c',
   'src/core/ext/client_config/uri_parser.c',
   'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
+  'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c',
   'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
+  'src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c',
   'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
   'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
   'third_party/nanopb/pb_common.c',
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index f764626..c13d1a0 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -126,6 +126,8 @@
 grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
 grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
+grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
+grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -393,6 +395,8 @@
   grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
   grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
+  grpc_insecure_channel_create_from_fd_import = (grpc_insecure_channel_create_from_fd_type) GetProcAddress(library, "grpc_insecure_channel_create_from_fd");
+  grpc_server_add_insecure_channel_from_fd_import = (grpc_server_add_insecure_channel_from_fd_type) GetProcAddress(library, "grpc_server_add_insecure_channel_from_fd");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 5d690a9..9c86a36 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -43,6 +43,7 @@
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
 #include <grpc/grpc_security.h>
 #include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/byte_buffer.h>
@@ -328,6 +329,12 @@
 typedef const char *(*grpc_call_error_to_string_type)(grpc_call_error error);
 extern grpc_call_error_to_string_type grpc_call_error_to_string_import;
 #define grpc_call_error_to_string grpc_call_error_to_string_import
+typedef grpc_channel *(*grpc_insecure_channel_create_from_fd_type)(const char *target, int fd, const grpc_channel_args *args);
+extern grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
+#define grpc_insecure_channel_create_from_fd grpc_insecure_channel_create_from_fd_import
+typedef void(*grpc_server_add_insecure_channel_from_fd_type)(grpc_server *server, grpc_completion_queue *cq, int fd);
+extern grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
+#define grpc_server_add_insecure_channel_from_fd grpc_server_add_insecure_channel_from_fd_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
diff --git a/test/core/bad_client/tests/large_metadata.c b/test/core/bad_client/tests/large_metadata.c
index b7d329c..ded5f17 100644
--- a/test/core/bad_client/tests/large_metadata.c
+++ b/test/core/bad_client/tests/large_metadata.c
@@ -163,6 +163,7 @@
   meta.value_length = metadata_value_size;
 
   grpc_op op;
+  memset(&op, 0, sizeof(op));
   op.op = GRPC_OP_SEND_INITIAL_METADATA;
   op.data.send_initial_metadata.count = 1;
   op.data.send_initial_metadata.metadata = &meta;
diff --git a/test/core/bad_ssl/bad_ssl_test.c b/test/core/bad_ssl/bad_ssl_test.c
index c4ae212..bb06ab0 100644
--- a/test/core/bad_ssl/bad_ssl_test.c
+++ b/test/core/bad_ssl/bad_ssl_test.c
@@ -84,6 +84,7 @@
                                "/foo", "foo.test.google.fr:1234", deadline,
                                NULL);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/channel/channel_args_test.c b/test/core/channel/channel_args_test.c
index c2fc050..8ef1bff 100644
--- a/test/core/channel/channel_args_test.c
+++ b/test/core/channel/channel_args_test.c
@@ -136,8 +136,10 @@
 
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_create();
   test_set_compression_algorithm();
   test_compression_algorithm_states();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/client_config/lb_policies_test.c b/test/core/client_config/lb_policies_test.c
index 2ec4612..1534360 100644
--- a/test/core/client_config/lb_policies_test.c
+++ b/test/core/client_config/lb_policies_test.c
@@ -275,6 +275,7 @@
     GPR_ASSERT(c);
     completed_client = 0;
 
+    memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_INITIAL_METADATA;
     op->data.send_initial_metadata.count = 0;
@@ -327,6 +328,7 @@
     }
 
     if (s_idx >= 0) {
+      memset(ops, 0, sizeof(ops));
       op = ops;
       op->op = GRPC_OP_SEND_INITIAL_METADATA;
       op->data.send_initial_metadata.count = 0;
@@ -415,6 +417,7 @@
     kill_server(f, i);
   }
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -640,7 +643,7 @@
                                       const size_t num_iters) {
   size_t i;
   for (i = 0; i < num_iters; i++) {
-    gpr_log(GPR_ERROR, "FAILURE: Iter, expected, actual:%d (%d, %d)", i,
+    gpr_log(GPR_ERROR, "FAILURE: Iter (expected, actual): %d (%d, %d)", i,
             expected_connection_sequence[i % expected_seq_length],
             actual_connection_sequence[i]);
   }
@@ -664,8 +667,6 @@
     const int actual = actual_connection_sequence[i];
     const int expected = expected_connection_sequence[i % expected_seq_length];
     if (actual != expected) {
-      gpr_log(GPR_ERROR, "FAILURE: expected %d, actual %d at iter %d", expected,
-              actual, i);
       print_failed_expectations(expected_connection_sequence,
                                 actual_connection_sequence, expected_seq_length,
                                 num_iters);
@@ -692,24 +693,21 @@
   memcpy(expected_connection_sequence, actual_connection_sequence + 2,
          expected_seq_length * sizeof(int));
 
-  /* first three elements of the sequence should be [<1st>, -1] */
-  if (actual_connection_sequence[0] != expected_connection_sequence[0]) {
-    gpr_log(GPR_ERROR, "FAILURE: expected %d, actual %d at iter %d",
-            expected_connection_sequence[0], actual_connection_sequence[0], 0);
-    print_failed_expectations(expected_connection_sequence,
-                              actual_connection_sequence, expected_seq_length,
-                              1u);
-    abort();
-  }
-
+  /* first two elements of the sequence should be [0 (1st server), -1 (failure)]
+   */
+  GPR_ASSERT(actual_connection_sequence[0] == 0);
   GPR_ASSERT(actual_connection_sequence[1] == -1);
 
+  /* the next two element must be [3, 0], repeating from that point: the 3 is
+   * brought forth by servers 1 and 2 disappearing after the intial pick of 0 */
+  GPR_ASSERT(actual_connection_sequence[2] == 3);
+  GPR_ASSERT(actual_connection_sequence[3] == 0);
+
+  /* make sure that the expectation obliges */
   for (i = 2; i < num_iters; i++) {
     const int actual = actual_connection_sequence[i];
     const int expected = expected_connection_sequence[i % expected_seq_length];
     if (actual != expected) {
-      gpr_log(GPR_ERROR, "FAILURE: expected %d, actual %d at iter %d", expected,
-              actual, i);
       print_failed_expectations(expected_connection_sequence,
                                 actual_connection_sequence, expected_seq_length,
                                 num_iters);
@@ -757,8 +755,6 @@
     const int actual = actual_connection_sequence[i];
     const int expected = expected_connection_sequence[i % expected_seq_length];
     if (actual != expected) {
-      gpr_log(GPR_ERROR, "FAILURE: expected %d, actual %d at iter %d", expected,
-              actual, i);
       print_failed_expectations(expected_connection_sequence,
                                 actual_connection_sequence, expected_seq_length,
                                 num_iters);
@@ -856,8 +852,6 @@
     const int expected =
         expected_connection_sequence[j++ % expected_seq_length];
     if (actual != expected) {
-      gpr_log(GPR_ERROR, "FAILURE: expected %d, actual %d at iter %d", expected,
-              actual, i);
       print_failed_expectations(expected_connection_sequence,
                                 actual_connection_sequence, expected_seq_length,
                                 num_iters);
@@ -887,7 +881,8 @@
   GPR_ASSERT(grpc_lb_policy_create(&exec_ctx, NULL, NULL) == NULL);
 
   spec = test_spec_create(NUM_ITERS, NUM_SERVERS);
-  /* everything is fine, all servers stay up the whole time and life's peachy */
+  /* everything is fine, all servers stay up the whole time and life's peachy
+   */
   spec->verifier = verify_vanilla_round_robin;
   spec->description = "test_all_server_up";
   run_spec(spec);
diff --git a/test/core/client_config/set_initial_connect_string_test.c b/test/core/client_config/set_initial_connect_string_test.c
index 5390c4a..438b949 100644
--- a/test/core/client_config/set_initial_connect_string_test.c
+++ b/test/core/client_config/set_initial_connect_string_test.c
@@ -136,6 +136,7 @@
   state.call = grpc_channel_create_call(
       state.channel, NULL, GRPC_PROPAGATE_DEFAULTS, state.cq, "/Service/Method",
       "localhost", gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  memset(&state.op, 0, sizeof(state.op));
   state.op.op = GRPC_OP_SEND_INITIAL_METADATA;
   state.op.data.send_initial_metadata.count = 0;
   state.op.flags = 0;
diff --git a/test/core/end2end/cq_verifier.c b/test/core/end2end/cq_verifier.c
index 77afe58..8e9fa70 100644
--- a/test/core/end2end/cq_verifier.c
+++ b/test/core/end2end/cq_verifier.c
@@ -284,6 +284,6 @@
   return e;
 }
 
-void cq_expect_completion(cq_verifier *v, void *tag, int success) {
+void cq_expect_completion(cq_verifier *v, void *tag, bool success) {
   add(v, GRPC_OP_COMPLETE, tag)->success = success;
 }
diff --git a/test/core/end2end/cq_verifier.h b/test/core/end2end/cq_verifier.h
index b3e07c4..8c9a85c 100644
--- a/test/core/end2end/cq_verifier.h
+++ b/test/core/end2end/cq_verifier.h
@@ -34,6 +34,8 @@
 #ifndef GRPC_TEST_CORE_END2END_CQ_VERIFIER_H
 #define GRPC_TEST_CORE_END2END_CQ_VERIFIER_H
 
+#include <stdbool.h>
+
 #include <grpc/grpc.h>
 #include "test/core/util/test_config.h"
 
@@ -57,7 +59,7 @@
    Any functions taking ... expect a NULL terminated list of key/value pairs
    (each pair using two parameter slots) of metadata that MUST be present in
    the event. */
-void cq_expect_completion(cq_verifier *v, void *tag, int success);
+void cq_expect_completion(cq_verifier *v, void *tag, bool success);
 
 int byte_buffer_eq_string(grpc_byte_buffer *byte_buffer, const char *string);
 int contains_metadata(grpc_metadata_array *array, const char *key,
diff --git a/test/core/end2end/dualstack_socket_test.c b/test/core/end2end/dualstack_socket_test.c
index 202fb3b..46e060e 100644
--- a/test/core/end2end/dualstack_socket_test.c
+++ b/test/core/end2end/dualstack_socket_test.c
@@ -167,6 +167,7 @@
                                "/foo", "foo.test.google.fr", deadline, NULL);
   GPR_ASSERT(c);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -201,6 +202,7 @@
     cq_expect_completion(cqv, tag(101), 1);
     cq_verify(cqv);
 
+    memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_INITIAL_METADATA;
     op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/fixtures/h2_fd.c b/test/core/end2end/fixtures/h2_fd.c
new file mode 100644
index 0000000..e938fe7
--- /dev/null
+++ b/test/core/end2end/fixtures/h2_fd.c
@@ -0,0 +1,128 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <fcntl.h>
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "test/core/util/test_config.h"
+
+typedef struct { int fd_pair[2]; } sp_fixture_data;
+
+static void create_sockets(int sv[2]) {
+  int flags;
+  grpc_create_socketpair_if_unix(sv);
+  flags = fcntl(sv[0], F_GETFL, 0);
+  GPR_ASSERT(fcntl(sv[0], F_SETFL, flags | O_NONBLOCK) == 0);
+  flags = fcntl(sv[1], F_GETFL, 0);
+  GPR_ASSERT(fcntl(sv[1], F_SETFL, flags | O_NONBLOCK) == 0);
+  GPR_ASSERT(grpc_set_socket_no_sigpipe_if_possible(sv[0]));
+  GPR_ASSERT(grpc_set_socket_no_sigpipe_if_possible(sv[1]));
+}
+
+static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
+    grpc_channel_args *client_args, grpc_channel_args *server_args) {
+  sp_fixture_data *fixture_data = gpr_malloc(sizeof(*fixture_data));
+
+  grpc_end2end_test_fixture f;
+  memset(&f, 0, sizeof(f));
+  f.fixture_data = fixture_data;
+  f.cq = grpc_completion_queue_create(NULL);
+
+  create_sockets(fixture_data->fd_pair);
+
+  return f;
+}
+
+static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
+                                          grpc_channel_args *client_args) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  sp_fixture_data *sfd = f->fixture_data;
+
+  GPR_ASSERT(!f->client);
+  f->client = grpc_insecure_channel_create_from_fd(
+      "fixture_client", sfd->fd_pair[0], client_args);
+  GPR_ASSERT(f->client);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
+                                          grpc_channel_args *server_args) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  sp_fixture_data *sfd = f->fixture_data;
+  GPR_ASSERT(!f->server);
+  f->server = grpc_server_create(server_args, NULL);
+  GPR_ASSERT(f->server);
+  grpc_server_register_completion_queue(f->server, f->cq, NULL);
+  grpc_server_start(f->server);
+
+  grpc_server_add_insecure_channel_from_fd(f->server, f->cq, sfd->fd_pair[1]);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture *f) {
+  gpr_free(f->fixture_data);
+}
+
+/* All test configurations */
+static grpc_end2end_test_config configs[] = {
+    {"chttp2/fd", 0, chttp2_create_fixture_socketpair,
+     chttp2_init_client_socketpair, chttp2_init_server_socketpair,
+     chttp2_tear_down_socketpair},
+};
+
+int main(int argc, char **argv) {
+  size_t i;
+
+  grpc_test_init(argc, argv);
+  grpc_end2end_tests_pre_init();
+  grpc_init();
+
+  for (i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
+    grpc_end2end_tests(argc, argv, configs[i]);
+  }
+
+  grpc_shutdown();
+
+  return 0;
+}
diff --git a/test/core/end2end/fixtures/h2_ssl_cert.c b/test/core/end2end/fixtures/h2_ssl_cert.c
index 0fa5251..b476bf5 100644
--- a/test/core/end2end/fixtures/h2_ssl_cert.c
+++ b/test/core/end2end/fixtures/h2_ssl_cert.c
@@ -321,6 +321,7 @@
                                NULL);
   GPR_ASSERT(c);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/fixtures/proxy.c b/test/core/end2end/fixtures/proxy.c
index 7f10649..beed80d 100644
--- a/test/core/end2end/fixtures/proxy.c
+++ b/test/core/end2end/fixtures/proxy.c
@@ -170,6 +170,7 @@
   grpc_op op;
   grpc_call_error err;
 
+  memset(&op, 0, sizeof(op));
   if (!pc->proxy->shutdown) {
     op.op = GRPC_OP_SEND_INITIAL_METADATA;
     op.flags = 0;
@@ -329,6 +330,7 @@
 
   if (success) {
     grpc_op op;
+    memset(&op, 0, sizeof(op));
     proxy_call *pc = gpr_malloc(sizeof(*pc));
     memset(pc, 0, sizeof(*pc));
     pc->proxy = proxy;
diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.c
index 6bcddbd..3cae0bd 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.c
@@ -739,6 +739,7 @@
           break;
         }
         grpc_op *ops = gpr_malloc(sizeof(grpc_op) * num_ops);
+        memset(ops, 0, sizeof(grpc_op) * num_ops);
         bool ok = true;
         size_t i;
         grpc_op *op;
diff --git a/test/core/end2end/fuzzers/client_fuzzer.c b/test/core/end2end/fuzzers/client_fuzzer.c
index afcf763..5612b66 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.c
+++ b/test/core/end2end/fuzzers/client_fuzzer.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <string.h>
+
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
@@ -78,6 +80,7 @@
   size_t details_capacity = 0;
 
   grpc_op ops[6];
+  memset(ops, 0, sizeof(ops));
   grpc_op *op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index cf1ba7c..3d3bec1 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -45,6 +45,8 @@
 socketpair_unsecure_fixture_options = default_unsecure_fixture_options._replace(fullstack=False, dns_resolver=False)
 default_secure_fixture_options = default_unsecure_fixture_options._replace(secure=True)
 uds_fixture_options = default_unsecure_fixture_options._replace(dns_resolver=False, platforms=['linux', 'mac', 'posix'])
+fd_unsecure_fixture_options = default_unsecure_fixture_options._replace(
+    dns_resolver=False, fullstack=False, platforms=['linux', 'mac', 'posix'])
 
 
 # maps fixture name to whether it requires the security library
@@ -52,6 +54,7 @@
     'h2_compress': default_unsecure_fixture_options,
     'h2_census': default_unsecure_fixture_options,
     'h2_fakesec': default_secure_fixture_options._replace(ci_mac=False),
+    'h2_fd': fd_unsecure_fixture_options,
     'h2_full': default_unsecure_fixture_options,
     'h2_full+pipe': default_unsecure_fixture_options._replace(
         platforms=['linux']),
@@ -73,7 +76,8 @@
 }
 
 TestOptions = collections.namedtuple(
-    'TestOptions', 'needs_fullstack needs_dns proxyable secure traceable cpu_cost')
+    'TestOptions',
+    'needs_fullstack needs_dns proxyable secure traceable cpu_cost')
 default_test_options = TestOptions(False, False, True, False, True, 1.0)
 connectivity_test_options = default_test_options._replace(needs_fullstack=True)
 
@@ -90,8 +94,10 @@
     'cancel_before_invoke': default_test_options._replace(cpu_cost=LOWCPU),
     'cancel_in_a_vacuum': default_test_options._replace(cpu_cost=LOWCPU),
     'cancel_with_status': default_test_options._replace(cpu_cost=LOWCPU),
-    'compressed_payload': default_test_options._replace(proxyable=False, cpu_cost=LOWCPU),
-    'connectivity': connectivity_test_options._replace(proxyable=False, cpu_cost=LOWCPU),
+    'compressed_payload': default_test_options._replace(proxyable=False,
+                                                        cpu_cost=LOWCPU),
+    'connectivity': connectivity_test_options._replace(proxyable=False,
+                                                       cpu_cost=LOWCPU),
     'default_host': default_test_options._replace(needs_fullstack=True,
                                                   needs_dns=True),
     'disappearing_server': connectivity_test_options,
@@ -117,7 +123,8 @@
     'server_finishes_request': default_test_options,
     'shutdown_finishes_calls': default_test_options,
     'shutdown_finishes_tags': default_test_options,
-    'simple_delayed_request': connectivity_test_options._replace(cpu_cost=LOWCPU),
+    'simple_delayed_request': connectivity_test_options._replace(
+        cpu_cost=LOWCPU),
     'simple_metadata': default_test_options,
     'simple_request': default_test_options,
     'trailing_metadata': default_test_options,
diff --git a/test/core/end2end/goaway_server_test.c b/test/core/end2end/goaway_server_test.c
index 5f8c264..3266793 100644
--- a/test/core/end2end/goaway_server_test.c
+++ b/test/core/end2end/goaway_server_test.c
@@ -132,6 +132,7 @@
       chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq, "/foo", "127.0.0.1",
       GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20), NULL);
   /* send initial metadata to probe connectivity */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -142,6 +143,7 @@
                                                    (size_t)(op - ops),
                                                    tag(0x101), NULL));
   /* and receive status to probe termination */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
@@ -183,6 +185,7 @@
                                         tag(0x9999));
 
   /* listen for close on the server call to probe for finishing */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled1;
@@ -205,6 +208,7 @@
       chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq, "/foo", "127.0.0.1",
       GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20), NULL);
   /* send initial metadata to probe connectivity */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -215,6 +219,7 @@
                                                    (size_t)(op - ops),
                                                    tag(0x201), NULL));
   /* and receive status to probe termination */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
@@ -249,6 +254,7 @@
   cq_verify(cqv);
 
   /* listen for close on the server call to probe for finishing */
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled2;
diff --git a/test/core/end2end/invalid_call_argument_test.c b/test/core/end2end/invalid_call_argument_test.c
index cf42e92..3545660 100644
--- a/test/core/end2end/invalid_call_argument_test.c
+++ b/test/core/end2end/invalid_call_argument_test.c
@@ -30,11 +30,15 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+
+#include <limits.h>
+#include <string.h>
+
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
-#include <limits.h>
+
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
@@ -74,6 +78,7 @@
   g_state.cqv = cq_verifier_create(g_state.cq);
   g_state.details = NULL;
   g_state.details_capacity = 0;
+  memset(g_state.ops, 0, sizeof(g_state.ops));
 
   if (is_client) {
     /* create a call, channel to a non existant server */
diff --git a/test/core/end2end/no_server_test.c b/test/core/end2end/no_server_test.c
index 7a5cd23..08af382 100644
--- a/test/core/end2end/no_server_test.c
+++ b/test/core/end2end/no_server_test.c
@@ -31,9 +31,12 @@
  *
  */
 
+#include <string.h>
+
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/util/test_config.h"
 
@@ -65,6 +68,7 @@
   call = grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
                                   "/Foo", "nonexistant", deadline, NULL);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/bad_hostname.c b/test/core/end2end/tests/bad_hostname.c
index 3cb9b3d..c9663c2 100644
--- a/test/core/end2end/tests/bad_hostname.c
+++ b/test/core/end2end/tests/bad_hostname.c
@@ -123,6 +123,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/binary_metadata.c b/test/core/end2end/tests/binary_metadata.c
index 994c3bf..3dd2612 100644
--- a/test/core/end2end/tests/binary_metadata.c
+++ b/test/core/end2end/tests/binary_metadata.c
@@ -157,6 +157,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -201,6 +202,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -219,6 +221,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/call_creds.c b/test/core/end2end/tests/call_creds.c
index 5c6791f..694a0aa 100644
--- a/test/core/end2end/tests/call_creds.c
+++ b/test/core/end2end/tests/call_creds.c
@@ -193,6 +193,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -248,6 +249,7 @@
   /* Cannot set creds on the server call object. */
   GPR_ASSERT(grpc_call_set_credentials(s, NULL) != GRPC_CALL_OK);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -265,6 +267,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
@@ -410,6 +413,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/core/end2end/tests/cancel_after_accept.c b/test/core/end2end/tests/cancel_after_accept.c
index fc2a64a..51c13da 100644
--- a/test/core/end2end/tests/cancel_after_accept.c
+++ b/test/core/end2end/tests/cancel_after_accept.c
@@ -136,6 +136,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
@@ -174,6 +175,7 @@
   cq_expect_completion(cqv, tag(2), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message = &request_payload_recv;
diff --git a/test/core/end2end/tests/cancel_after_client_done.c b/test/core/end2end/tests/cancel_after_client_done.c
index 3bafa8c..2b5a409 100644
--- a/test/core/end2end/tests/cancel_after_client_done.c
+++ b/test/core/end2end/tests/cancel_after_client_done.c
@@ -136,6 +136,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
@@ -178,6 +179,7 @@
   cq_expect_completion(cqv, tag(2), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message = &request_payload_recv;
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.c
index fc2751a..85fbe9d 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.c
@@ -131,6 +131,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/core/end2end/tests/cancel_before_invoke.c b/test/core/end2end/tests/cancel_before_invoke.c
index 33005db..d99062c 100644
--- a/test/core/end2end/tests/cancel_before_invoke.c
+++ b/test/core/end2end/tests/cancel_before_invoke.c
@@ -131,6 +131,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/core/end2end/tests/cancel_with_status.c b/test/core/end2end/tests/cancel_with_status.c
index c3ee4a6..83629a9 100644
--- a/test/core/end2end/tests/cancel_with_status.c
+++ b/test/core/end2end/tests/cancel_with_status.c
@@ -122,6 +122,7 @@
   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.c
index 589bc31..ec5c012 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.c
@@ -38,13 +38,15 @@
 
 #include <grpc/byte_buffer.h>
 #include <grpc/byte_buffer_reader.h>
+#include <grpc/compression.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/channel/compress_filter.h"
+#include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/call_test_only.h"
 #include "test/core/end2end/cq_verifier.h"
 
@@ -102,12 +104,12 @@
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void request_with_payload_template(
+static void request_for_disabled_algorithm(
     grpc_end2end_test_config config, const char *test_name,
     uint32_t send_flags_bitmask,
-    grpc_compression_algorithm requested_compression_algorithm,
-    grpc_compression_algorithm expected_compression_algorithm,
-    grpc_metadata *client_metadata) {
+    grpc_compression_algorithm algorithm_to_disable,
+    grpc_compression_algorithm requested_client_compression_algorithm,
+    grpc_status_code expected_error, grpc_metadata *client_metadata) {
   grpc_call *c;
   grpc_call *s;
   gpr_slice request_payload_slice;
@@ -137,9 +139,11 @@
   request_payload = grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
   client_args = grpc_channel_args_set_compression_algorithm(
-      NULL, requested_compression_algorithm);
-  server_args = grpc_channel_args_set_compression_algorithm(
-      NULL, requested_compression_algorithm);
+      NULL, requested_client_compression_algorithm);
+  server_args =
+      grpc_channel_args_set_compression_algorithm(NULL, GRPC_COMPRESS_NONE);
+  server_args = grpc_channel_args_compression_algorithm_set_state(
+      &server_args, algorithm_to_disable, false);
 
   f = begin_test(config, test_name, client_args, server_args);
   cqv = cq_verifier_create(f.cq);
@@ -153,6 +157,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   if (client_metadata != NULL) {
@@ -193,18 +198,9 @@
       grpc_server_request_call(f.server, &s, &call_details,
                                &request_metadata_recv, f.cq, f.cq, tag(101));
   GPR_ASSERT(GRPC_CALL_OK == error);
-  cq_expect_completion(cqv, tag(101), 1);
+  cq_expect_completion(cqv, tag(101), true);
   cq_verify(cqv);
 
-  GPR_ASSERT(
-      GPR_BITCOUNT(grpc_call_test_only_get_encodings_accepted_by_peer(s)) == 3);
-  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
-                        GRPC_COMPRESS_NONE) != 0);
-  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
-                        GRPC_COMPRESS_DEFLATE) != 0);
-  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
-                        GRPC_COMPRESS_GZIP) != 0);
-
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -219,8 +215,7 @@
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
-  cq_expect_completion(cqv, tag(102), 1);
-  cq_verify(cqv);
+  cq_expect_completion(cqv, tag(102), false);
 
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
@@ -228,31 +223,28 @@
   op->flags = 0;
   op->reserved = NULL;
   op++;
-  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
-  op->data.send_status_from_server.trailing_metadata_count = 0;
-  op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
-  cq_expect_completion(cqv, tag(103), 1);
-  cq_expect_completion(cqv, tag(1), 1);
+  cq_expect_completion(cqv, tag(103), true);
+  cq_expect_completion(cqv, tag(1), true);
   cq_verify(cqv);
 
-  GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  /* call was cancelled (closed) ... */
+  GPR_ASSERT(was_cancelled != 0);
+  /* with a certain error */
+  GPR_ASSERT(status == expected_error);
+
+  char *algo_name = NULL;
+  GPR_ASSERT(grpc_compression_algorithm_name(algorithm_to_disable, &algo_name));
+  char *expected_details = NULL;
+  gpr_asprintf(&expected_details, "Compression algorithm '%s' is disabled.",
+               algo_name);
+  /* and we expect a specific reason for it */
+  GPR_ASSERT(0 == strcmp(details, expected_details));
+  gpr_free(expected_details);
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
   GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
-  GPR_ASSERT(was_cancelled == 0);
-
-  GPR_ASSERT(request_payload_recv->type == GRPC_BB_RAW);
-  GPR_ASSERT(request_payload_recv->data.raw.compression ==
-             expected_compression_algorithm);
-
-  GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, str));
 
   gpr_free(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
@@ -276,65 +268,340 @@
   config.tear_down_data(&f);
 }
 
+static void request_with_payload_template(
+    grpc_end2end_test_config config, const char *test_name,
+    uint32_t client_send_flags_bitmask,
+    grpc_compression_algorithm default_client_channel_compression_algorithm,
+    grpc_compression_algorithm default_server_channel_compression_algorithm,
+    grpc_compression_algorithm expected_algorithm_from_client,
+    grpc_compression_algorithm expected_algorithm_from_server,
+    grpc_metadata *client_init_metadata, bool set_server_level,
+    grpc_compression_level server_compression_level) {
+  grpc_call *c;
+  grpc_call *s;
+  gpr_slice request_payload_slice;
+  grpc_byte_buffer *request_payload;
+  gpr_timespec deadline = five_seconds_time();
+  grpc_channel_args *client_args;
+  grpc_channel_args *server_args;
+  grpc_end2end_test_fixture f;
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv = NULL;
+  grpc_byte_buffer *response_payload;
+  grpc_byte_buffer *response_payload_recv;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  int was_cancelled = 2;
+  cq_verifier *cqv;
+  char request_str[1024];
+  char response_str[1024];
+
+  memset(request_str, 'x', 1023);
+  request_str[1023] = '\0';
+
+  memset(response_str, 'y', 1023);
+  response_str[1023] = '\0';
+
+  request_payload_slice = gpr_slice_from_copied_string(request_str);
+  gpr_slice response_payload_slice = gpr_slice_from_copied_string(response_str);
+
+  client_args = grpc_channel_args_set_compression_algorithm(
+      NULL, default_client_channel_compression_algorithm);
+  server_args = grpc_channel_args_set_compression_algorithm(
+      NULL, default_server_channel_compression_algorithm);
+
+  f = begin_test(config, test_name, client_args, server_args);
+  cqv = cq_verifier_create(f.cq);
+
+  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+                               "/foo", "foo.test.google.fr", deadline, NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  if (client_init_metadata != NULL) {
+    op->data.send_initial_metadata.count = 1;
+    op->data.send_initial_metadata.metadata = client_init_metadata;
+  } else {
+    op->data.send_initial_metadata.count = 0;
+  }
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  error =
+      grpc_server_request_call(f.server, &s, &call_details,
+                               &request_metadata_recv, f.cq, f.cq, tag(100));
+  GPR_ASSERT(GRPC_CALL_OK == error);
+  cq_expect_completion(cqv, tag(100), true);
+  cq_verify(cqv);
+
+  GPR_ASSERT(GPR_BITCOUNT(grpc_call_test_only_get_encodings_accepted_by_peer(
+                 s)) == GRPC_COMPRESS_ALGORITHMS_COUNT);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_NONE) != 0);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_DEFLATE) != 0);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_GZIP) != 0);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  if (set_server_level) {
+    op->data.send_initial_metadata.maybe_compression_level.is_set = true;
+    op->data.send_initial_metadata.maybe_compression_level.level =
+        server_compression_level;
+  }
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  for (int i = 0; i < 2; i++) {
+    request_payload = grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+    response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_SEND_MESSAGE;
+    op->data.send_message = request_payload;
+    op->flags = client_send_flags_bitmask;
+    op->reserved = NULL;
+    op++;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message = &response_payload_recv;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message = &request_payload_recv;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+    cq_expect_completion(cqv, tag(102), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(request_payload_recv->type == GRPC_BB_RAW);
+    GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, request_str));
+    GPR_ASSERT(request_payload_recv->data.raw.compression ==
+               expected_algorithm_from_client);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_SEND_MESSAGE;
+    op->data.send_message = response_payload;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+    cq_expect_completion(cqv, tag(103), 1);
+    cq_expect_completion(cqv, tag(2), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(response_payload_recv->type == GRPC_BB_RAW);
+    GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, response_str));
+    if (server_compression_level > GRPC_COMPRESS_LEVEL_NONE) {
+      const grpc_compression_algorithm algo_for_server_level =
+          grpc_call_compression_for_level(s, server_compression_level);
+      GPR_ASSERT(response_payload_recv->data.raw.compression ==
+                 algo_for_server_level);
+    } else {
+      GPR_ASSERT(response_payload_recv->data.raw.compression ==
+                 expected_algorithm_from_server);
+    }
+
+    grpc_byte_buffer_destroy(request_payload);
+    grpc_byte_buffer_destroy(response_payload);
+    grpc_byte_buffer_destroy(request_payload_recv);
+    grpc_byte_buffer_destroy(response_payload_recv);
+  }
+
+  gpr_slice_unref(request_payload_slice);
+  gpr_slice_unref(response_payload_slice);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  cq_expect_completion(cqv, tag(1), 1);
+  cq_expect_completion(cqv, tag(3), 1);
+  cq_expect_completion(cqv, tag(101), 1);
+  cq_expect_completion(cqv, tag(104), 1);
+  cq_verify(cqv);
+
+  GPR_ASSERT(status == GRPC_STATUS_OK);
+  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  GPR_ASSERT(was_cancelled == 0);
+
+  gpr_free(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_channel_args_destroy(client_args);
+  grpc_channel_args_destroy(server_args);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
 static void test_invoke_request_with_exceptionally_uncompressed_payload(
     grpc_end2end_test_config config) {
   request_with_payload_template(
       config, "test_invoke_request_with_exceptionally_uncompressed_payload",
-      GRPC_WRITE_NO_COMPRESS, GRPC_COMPRESS_GZIP, GRPC_COMPRESS_NONE, NULL);
+      GRPC_WRITE_NO_COMPRESS, GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP,
+      GRPC_COMPRESS_NONE, GRPC_COMPRESS_GZIP, NULL, false,
+      /* ignored */ GRPC_COMPRESS_LEVEL_NONE);
 }
 
 static void test_invoke_request_with_uncompressed_payload(
     grpc_end2end_test_config config) {
   request_with_payload_template(
       config, "test_invoke_request_with_uncompressed_payload", 0,
-      GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE, NULL);
+      GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE,
+      GRPC_COMPRESS_NONE, NULL, false, /* ignored */ GRPC_COMPRESS_LEVEL_NONE);
 }
 
 static void test_invoke_request_with_compressed_payload(
     grpc_end2end_test_config config) {
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload", 0,
-      GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP, NULL);
+      GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP,
+      GRPC_COMPRESS_GZIP, NULL, false, /* ignored */ GRPC_COMPRESS_LEVEL_NONE);
+}
+
+static void test_invoke_request_with_server_level(
+    grpc_end2end_test_config config) {
+  request_with_payload_template(
+      config, "test_invoke_request_with_server_level", 0, GRPC_COMPRESS_NONE,
+      GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE /* ignored */,
+      NULL, true, GRPC_COMPRESS_LEVEL_HIGH);
 }
 
 static void test_invoke_request_with_compressed_payload_md_override(
     grpc_end2end_test_config config) {
   grpc_metadata gzip_compression_override;
-  grpc_metadata none_compression_override;
+  grpc_metadata identity_compression_override;
 
-  gzip_compression_override.key = GRPC_COMPRESS_REQUEST_ALGORITHM_KEY;
+  gzip_compression_override.key = GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY;
   gzip_compression_override.value = "gzip";
-  gzip_compression_override.value_length = 4;
+  gzip_compression_override.value_length =
+      strlen(gzip_compression_override.value);
   memset(&gzip_compression_override.internal_data, 0,
          sizeof(gzip_compression_override.internal_data));
 
-  none_compression_override.key = GRPC_COMPRESS_REQUEST_ALGORITHM_KEY;
-  none_compression_override.value = "identity";
-  none_compression_override.value_length = 4;
-  memset(&none_compression_override.internal_data, 0,
-         sizeof(none_compression_override.internal_data));
+  identity_compression_override.key = GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY;
+  identity_compression_override.value = "identity";
+  identity_compression_override.value_length =
+      strlen(identity_compression_override.value);
+  memset(&identity_compression_override.internal_data, 0,
+         sizeof(identity_compression_override.internal_data));
 
   /* Channel default NONE (aka IDENTITY), call override to GZIP */
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload_md_override_1", 0,
-      GRPC_COMPRESS_NONE, GRPC_COMPRESS_GZIP, &gzip_compression_override);
+      GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE, GRPC_COMPRESS_GZIP,
+      GRPC_COMPRESS_NONE, &gzip_compression_override, false,
+      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE);
 
   /* Channel default DEFLATE, call override to GZIP */
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload_md_override_2", 0,
-      GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_GZIP, &gzip_compression_override);
+      GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_NONE, GRPC_COMPRESS_GZIP,
+      GRPC_COMPRESS_NONE, &gzip_compression_override, false,
+      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE);
 
   /* Channel default DEFLATE, call override to NONE (aka IDENTITY) */
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload_md_override_3", 0,
-      GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_NONE, &none_compression_override);
+      GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE,
+      GRPC_COMPRESS_NONE, &identity_compression_override, false,
+      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE);
+}
+
+static void test_invoke_request_with_disabled_algorithm(
+    grpc_end2end_test_config config) {
+  request_for_disabled_algorithm(
+      config, "test_invoke_request_with_disabled_algorithm", 0,
+      GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP, GRPC_STATUS_UNIMPLEMENTED, NULL);
 }
 
 void compressed_payload(grpc_end2end_test_config config) {
   test_invoke_request_with_exceptionally_uncompressed_payload(config);
   test_invoke_request_with_uncompressed_payload(config);
   test_invoke_request_with_compressed_payload(config);
+  test_invoke_request_with_server_level(config);
   test_invoke_request_with_compressed_payload_md_override(config);
+  test_invoke_request_with_disabled_algorithm(config);
 }
 
 void compressed_payload_pre_init(void) {}
diff --git a/test/core/end2end/tests/default_host.c b/test/core/end2end/tests/default_host.c
index 44384a7..728ee59 100644
--- a/test/core/end2end/tests/default_host.c
+++ b/test/core/end2end/tests/default_host.c
@@ -131,6 +131,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -173,6 +174,7 @@
   gpr_log(GPR_DEBUG, "client_peer=%s", peer);
   gpr_free(peer);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/disappearing_server.c b/test/core/end2end/tests/disappearing_server.c
index 03d1ded..536fbd0 100644
--- a/test/core/end2end/tests/disappearing_server.c
+++ b/test/core/end2end/tests/disappearing_server.c
@@ -108,6 +108,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -145,6 +146,7 @@
      - and still complete the request */
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/filter_causes_close.c b/test/core/end2end/tests/filter_causes_close.c
index 29244d9..e6edb21 100644
--- a/test/core/end2end/tests/filter_causes_close.c
+++ b/test/core/end2end/tests/filter_causes_close.c
@@ -134,6 +134,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/graceful_server_shutdown.c b/test/core/end2end/tests/graceful_server_shutdown.c
index 26198f3..f527b86 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.c
+++ b/test/core/end2end/tests/graceful_server_shutdown.c
@@ -122,6 +122,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -160,6 +161,7 @@
   grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
   cq_verify_empty(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/high_initial_seqno.c b/test/core/end2end/tests/high_initial_seqno.c
index 374606d..50e3c9c 100644
--- a/test/core/end2end/tests/high_initial_seqno.c
+++ b/test/core/end2end/tests/high_initial_seqno.c
@@ -128,6 +128,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -161,6 +162,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/hpack_size.c b/test/core/end2end/tests/hpack_size.c
index 07d5d38..ee889b7 100644
--- a/test/core/end2end/tests/hpack_size.c
+++ b/test/core/end2end/tests/hpack_size.c
@@ -323,6 +323,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = GPR_ARRAY_SIZE(extra_metadata);
@@ -357,6 +358,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/idempotent_request.c b/test/core/end2end/tests/idempotent_request.c
index e53f3b2..dfedcfe 100644
--- a/test/core/end2end/tests/idempotent_request.c
+++ b/test/core/end2end/tests/idempotent_request.c
@@ -132,6 +132,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -174,6 +175,7 @@
   gpr_log(GPR_DEBUG, "client_peer=%s", peer);
   gpr_free(peer);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.c
index 6410305..9c9ca95 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.c
@@ -138,6 +138,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -181,6 +182,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -198,6 +200,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/large_metadata.c b/test/core/end2end/tests/large_metadata.c
index ae1f68a..1f27896 100644
--- a/test/core/end2end/tests/large_metadata.c
+++ b/test/core/end2end/tests/large_metadata.c
@@ -142,6 +142,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   // Client: send request.
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -183,6 +184,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   // Server: send initial metadata and receive request.
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -201,6 +203,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   // Server: receive close and send status.  This should trigger
   // completion of request on client.
   op = ops;
diff --git a/test/core/end2end/tests/max_concurrent_streams.c b/test/core/end2end/tests/max_concurrent_streams.c
index 1bb5307..41de74f 100644
--- a/test/core/end2end/tests/max_concurrent_streams.c
+++ b/test/core/end2end/tests/max_concurrent_streams.c
@@ -124,6 +124,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -157,6 +158,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -270,6 +272,7 @@
                                  f.server, &s1, &call_details,
                                  &request_metadata_recv, f.cq, f.cq, tag(101)));
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -283,6 +286,7 @@
   error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
@@ -300,6 +304,7 @@
   error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -313,6 +318,7 @@
   error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
@@ -354,6 +360,7 @@
   }
   GPR_ASSERT(live_call == 300 || live_call == 400);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -388,6 +395,7 @@
   cq_expect_completion(cqv, tag(201), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.c
index 4f57278..08d326a 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.c
@@ -143,6 +143,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -181,6 +182,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/negative_deadline.c b/test/core/end2end/tests/negative_deadline.c
index 03e57a9..fd56c8b 100644
--- a/test/core/end2end/tests/negative_deadline.c
+++ b/test/core/end2end/tests/negative_deadline.c
@@ -122,6 +122,7 @@
   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/core/end2end/tests/payload.c b/test/core/end2end/tests/payload.c
index bdfb135..443d85e 100644
--- a/test/core/end2end/tests/payload.c
+++ b/test/core/end2end/tests/payload.c
@@ -131,6 +131,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -174,6 +175,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -191,6 +193,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/ping_pong_streaming.c b/test/core/end2end/tests/ping_pong_streaming.c
index 15e1c6e..1d2f794 100644
--- a/test/core/end2end/tests/ping_pong_streaming.c
+++ b/test/core/end2end/tests/ping_pong_streaming.c
@@ -135,6 +135,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -164,6 +165,7 @@
   cq_expect_completion(cqv, tag(100), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -182,6 +184,7 @@
     request_payload = grpc_raw_byte_buffer_create(&request_payload_slice, 1);
     response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
 
+    memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
     op->data.send_message = request_payload;
@@ -196,6 +199,7 @@
     error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
+    memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_RECV_MESSAGE;
     op->data.recv_message = &request_payload_recv;
@@ -207,6 +211,7 @@
     cq_expect_completion(cqv, tag(102), 1);
     cq_verify(cqv);
 
+    memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
     op->data.send_message = response_payload;
@@ -228,6 +233,7 @@
   gpr_slice_unref(request_payload_slice);
   gpr_slice_unref(response_payload_slice);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op->flags = 0;
@@ -236,6 +242,7 @@
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
diff --git a/test/core/end2end/tests/registered_call.c b/test/core/end2end/tests/registered_call.c
index 3c4edba..ece6250 100644
--- a/test/core/end2end/tests/registered_call.c
+++ b/test/core/end2end/tests/registered_call.c
@@ -125,6 +125,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -158,6 +159,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/request_with_flags.c b/test/core/end2end/tests/request_with_flags.c
index f5a8d4d..b5d398b 100644
--- a/test/core/end2end/tests/request_with_flags.c
+++ b/test/core/end2end/tests/request_with_flags.c
@@ -131,6 +131,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/request_with_payload.c b/test/core/end2end/tests/request_with_payload.c
index 7706404..d94267e 100644
--- a/test/core/end2end/tests/request_with_payload.c
+++ b/test/core/end2end/tests/request_with_payload.c
@@ -130,6 +130,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -167,6 +168,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -184,6 +186,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/server_finishes_request.c b/test/core/end2end/tests/server_finishes_request.c
index a4f5319..a723c6f 100644
--- a/test/core/end2end/tests/server_finishes_request.c
+++ b/test/core/end2end/tests/server_finishes_request.c
@@ -126,6 +126,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -155,6 +156,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.c b/test/core/end2end/tests/shutdown_finishes_calls.c
index 80287cd..abb6b26 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.c
+++ b/test/core/end2end/tests/shutdown_finishes_calls.c
@@ -115,6 +115,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -149,6 +150,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.c
index 400b3a0..e1fcc03 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.c
@@ -117,6 +117,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -152,6 +153,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/simple_metadata.c b/test/core/end2end/tests/simple_metadata.c
index 707b3c9..c9b1a03 100644
--- a/test/core/end2end/tests/simple_metadata.c
+++ b/test/core/end2end/tests/simple_metadata.c
@@ -141,6 +141,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -185,6 +186,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -203,6 +205,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.c
index 4210842..a8014e6 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.c
@@ -132,6 +132,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -174,6 +175,7 @@
   gpr_log(GPR_DEBUG, "client_peer=%s", peer);
   gpr_free(peer);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
diff --git a/test/core/end2end/tests/trailing_metadata.c b/test/core/end2end/tests/trailing_metadata.c
index 4dd8c12..41e0f00 100644
--- a/test/core/end2end/tests/trailing_metadata.c
+++ b/test/core/end2end/tests/trailing_metadata.c
@@ -144,6 +144,7 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -188,6 +189,7 @@
   cq_expect_completion(cqv, tag(101), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 2;
@@ -206,6 +208,7 @@
   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
diff --git a/test/core/fling/client.c b/test/core/fling/client.c
index 8156227..123f2b5 100644
--- a/test/core/fling/client.c
+++ b/test/core/fling/client.c
@@ -65,6 +65,7 @@
   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
 
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index f97f337..0630f1d 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -52,6 +52,7 @@
 
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "test/core/util/test_config.h"
 
 static gpr_mu *g_mu;
@@ -68,17 +69,15 @@
                                struct sockaddr_in *sin) {
   int fd;
   int one = 1;
-  int buf_size = BUF_SIZE;
+  int buffer_size_bytes = BUF_SIZE;
   int flags;
 
   fd = socket(AF_INET, SOCK_STREAM, 0);
   setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
   /* Reset the size of socket send buffer to the minimal value to facilitate
      buffer filling up and triggering notify_on_write  */
-  GPR_ASSERT(
-      setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof(buf_size)) != -1);
-  GPR_ASSERT(
-      setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &buf_size, sizeof(buf_size)) != -1);
+  GPR_ASSERT(grpc_set_socket_sndbuf(fd, buffer_size_bytes));
+  GPR_ASSERT(grpc_set_socket_rcvbuf(fd, buffer_size_bytes));
   /* Make fd non-blocking */
   flags = fcntl(fd, F_GETFL, 0);
   GPR_ASSERT(fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0);
diff --git a/test/core/surface/lame_client_test.c b/test/core/surface/lame_client_test.c
index 3286db5..edd5056 100644
--- a/test/core/surface/lame_client_test.c
+++ b/test/core/surface/lame_client_test.c
@@ -115,6 +115,7 @@
   GPR_ASSERT(call);
   cqv = cq_verifier_create(cq);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
@@ -133,6 +134,7 @@
   cq_expect_completion(cqv, tag(1), 0);
   cq_verify(cqv);
 
+  memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
diff --git a/test/cpp/qps/parse_json.cc b/test/cpp/qps/parse_json.cc
index a90bf61..be80428 100644
--- a/test/cpp/qps/parse_json.cc
+++ b/test/cpp/qps/parse_json.cc
@@ -61,5 +61,20 @@
   GPR_ASSERT(msg->ParseFromString(binary));
 }
 
+grpc::string SerializeJson(const GRPC_CUSTOM_MESSAGE& msg,
+                           const grpc::string& type) {
+  std::unique_ptr<google::protobuf::util::TypeResolver> type_resolver(
+      google::protobuf::util::NewTypeResolverForDescriptorPool(
+          "type.googleapis.com",
+          google::protobuf::DescriptorPool::generated_pool()));
+  grpc::string binary;
+  grpc::string json_string;
+  msg.SerializeToString(&binary);
+  auto status =
+      BinaryToJsonString(type_resolver.get(), type, binary, &json_string);
+  GPR_ASSERT(status.ok());
+  return json_string;
+}
+
 }  // testing
 }  // grpc
diff --git a/test/cpp/qps/parse_json.h b/test/cpp/qps/parse_json.h
index 42d7d22..ce1821f 100644
--- a/test/cpp/qps/parse_json.h
+++ b/test/cpp/qps/parse_json.h
@@ -43,6 +43,9 @@
 void ParseJson(const grpc::string& json, const grpc::string& type,
                GRPC_CUSTOM_MESSAGE* msg);
 
+grpc::string SerializeJson(const GRPC_CUSTOM_MESSAGE& msg,
+                           const grpc::string& type);
+
 }  // testing
 }  // grpc
 
diff --git a/test/cpp/qps/report.cc b/test/cpp/qps/report.cc
index 3ae4139..2ec7d86 100644
--- a/test/cpp/qps/report.cc
+++ b/test/cpp/qps/report.cc
@@ -35,11 +35,9 @@
 
 #include <fstream>
 
-#include <google/protobuf/util/json_util.h>
-#include <google/protobuf/util/type_resolver_util.h>
-
 #include <grpc/support/log.h>
 #include "test/cpp/qps/driver.h"
+#include "test/cpp/qps/parse_json.h"
 #include "test/cpp/qps/stats.h"
 
 namespace grpc {
@@ -104,18 +102,8 @@
 }
 
 void JsonReporter::ReportQPS(const ScenarioResult& result) {
-  std::unique_ptr<google::protobuf::util::TypeResolver> type_resolver(
-      google::protobuf::util::NewTypeResolverForDescriptorPool(
-          "type.googleapis.com",
-          google::protobuf::DescriptorPool::generated_pool()));
-  grpc::string binary;
-  grpc::string json_string;
-  result.SerializeToString(&binary);
-  auto status = BinaryToJsonString(
-      type_resolver.get(), "type.googleapis.com/grpc.testing.ScenarioResult",
-      binary, &json_string);
-  GPR_ASSERT(status.ok());
-
+  grpc::string json_string =
+      SerializeJson(result, "type.googleapis.com/grpc.testing.ScenarioResult");
   std::ofstream output_file(report_file_);
   output_file << json_string;
   output_file.close();
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index 576f7ae..bb08cea 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -88,8 +88,7 @@
       protoc_ext_module(),
   ]),
   packages=setuptools.find_packages('.'),
-  # TODO(atash): Figure out why auditwheel doesn't like namespace packages.
-  #namespace_packages=['grpc'],
+  namespace_packages=['grpc'],
   install_requires=[
     'protobuf>=3.0.0a3',
   ],
diff --git a/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile b/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
index 3e31a2b..1d4e8e1 100644
--- a/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
@@ -41,3 +41,10 @@
 RUN /opt/python/cp34-cp34m/bin/pip install cython
 RUN /opt/python/cp35-cp35m/bin/pip install cython
 
+####################################################
+# Install auditwheel with fix for namespace packages
+RUN git clone https://github.com/pypa/auditwheel /usr/local/src/auditwheel
+RUN cd /usr/local/src/auditwheel && git checkout bf071b38c9fe78b025ea05c78b1cb61d7cb09939
+RUN /opt/python/cp35-cp35m/bin/pip install /usr/local/src/auditwheel
+RUN rm /usr/local/bin/auditwheel
+RUN cd /usr/local/bin && ln -s /opt/python/cp35-cp35m/bin/auditwheel
diff --git a/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile b/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
index 5fe62c2..8104996 100644
--- a/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
@@ -41,3 +41,10 @@
 RUN /opt/python/cp34-cp34m/bin/pip install cython
 RUN /opt/python/cp35-cp35m/bin/pip install cython
 
+####################################################
+# Install auditwheel with fix for namespace packages
+RUN git clone https://github.com/pypa/auditwheel /usr/local/src/auditwheel
+RUN cd /usr/local/src/auditwheel && git checkout bf071b38c9fe78b025ea05c78b1cb61d7cb09939
+RUN /opt/python/cp35-cp35m/bin/pip install /usr/local/src/auditwheel
+RUN rm /usr/local/bin/auditwheel
+RUN cd /usr/local/bin && ln -s /opt/python/cp35-cp35m/bin/auditwheel
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 6a80556..7f9d2df 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -765,6 +765,7 @@
 include/grpc++/client_context.h \
 include/grpc++/completion_queue.h \
 include/grpc++/create_channel.h \
+include/grpc++/create_channel_posix.h \
 include/grpc++/generic/async_generic_service.h \
 include/grpc++/generic/generic_stub.h \
 include/grpc++/grpc++.h \
@@ -793,6 +794,7 @@
 include/grpc++/server.h \
 include/grpc++/server_builder.h \
 include/grpc++/server_context.h \
+include/grpc++/server_posix.h \
 include/grpc++/support/async_stream.h \
 include/grpc++/support/async_unary_call.h \
 include/grpc++/support/byte_buffer.h \
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 746391e..dcf1a4c 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -765,6 +765,7 @@
 include/grpc++/client_context.h \
 include/grpc++/completion_queue.h \
 include/grpc++/create_channel.h \
+include/grpc++/create_channel_posix.h \
 include/grpc++/generic/async_generic_service.h \
 include/grpc++/generic/generic_stub.h \
 include/grpc++/grpc++.h \
@@ -793,6 +794,7 @@
 include/grpc++/server.h \
 include/grpc++/server_builder.h \
 include/grpc++/server_context.h \
+include/grpc++/server_posix.h \
 include/grpc++/support/async_stream.h \
 include/grpc++/support/async_unary_call.h \
 include/grpc++/support/byte_buffer.h \
@@ -873,6 +875,7 @@
 src/cpp/client/client_context.cc \
 src/cpp/client/create_channel.cc \
 src/cpp/client/create_channel_internal.cc \
+src/cpp/client/create_channel_posix.cc \
 src/cpp/client/credentials.cc \
 src/cpp/client/generic_stub.cc \
 src/cpp/client/insecure_credentials.cc \
@@ -888,6 +891,7 @@
 src/cpp/server/server_builder.cc \
 src/cpp/server/server_context.cc \
 src/cpp/server/server_credentials.cc \
+src/cpp/server/server_posix.cc \
 src/cpp/util/byte_buffer.cc \
 src/cpp/util/slice.cc \
 src/cpp/util/status.cc \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 7489401..72102b2 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -764,6 +764,7 @@
 include/grpc/byte_buffer_reader.h \
 include/grpc/compression.h \
 include/grpc/grpc.h \
+include/grpc/grpc_posix.h \
 include/grpc/status.h \
 include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 849a60ee..10c8cbd 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -764,6 +764,7 @@
 include/grpc/byte_buffer_reader.h \
 include/grpc/compression.h \
 include/grpc/grpc.h \
+include/grpc/grpc_posix.h \
 include/grpc/status.h \
 include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
@@ -947,7 +948,7 @@
 src/core/lib/channel/connected_channel.c \
 src/core/lib/channel/http_client_filter.c \
 src/core/lib/channel/http_server_filter.c \
-src/core/lib/compression/compression_algorithm.c \
+src/core/lib/compression/compression.c \
 src/core/lib/compression/message_compress.c \
 src/core/lib/debug/trace.c \
 src/core/lib/http/format_request.c \
@@ -1094,7 +1095,9 @@
 src/core/ext/client_config/subchannel_index.c \
 src/core/ext/client_config/uri_parser.c \
 src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
+src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c \
 src/core/ext/transport/chttp2/client/insecure/channel_create.c \
+src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c \
 src/core/ext/lb_policy/grpclb/load_balancer_api.c \
 src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
 third_party/nanopb/pb_common.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 325aca1..fd522ee 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -2361,14 +2361,10 @@
       "grpc_test_util", 
       "qps"
     ], 
-    "headers": [
-      "test/cpp/qps/parse_json.h"
-    ], 
+    "headers": [], 
     "language": "c++", 
     "name": "qps_json_driver", 
     "src": [
-      "test/cpp/qps/parse_json.cc", 
-      "test/cpp/qps/parse_json.h", 
       "test/cpp/qps/qps_json_driver.cc"
     ], 
     "third_party": false, 
@@ -3501,6 +3497,23 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "h2_fd_test", 
+    "src": [
+      "test/core/end2end/fixtures/h2_fd.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "end2end_tests", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "h2_full_test", 
     "src": [
       "test/core/end2end/fixtures/h2_full.c"
@@ -3756,6 +3769,23 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "src": [
+      "test/core/end2end/fixtures/h2_fd.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "end2end_nosec_tests", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc_test_util_unsecure", 
+      "grpc_unsecure"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "h2_full_nosec_test", 
     "src": [
       "test/core/end2end/fixtures/h2_full.c"
@@ -4546,6 +4576,7 @@
       "test/cpp/qps/histogram.h", 
       "test/cpp/qps/interarrival.h", 
       "test/cpp/qps/limit_cores.h", 
+      "test/cpp/qps/parse_json.h", 
       "test/cpp/qps/qps_worker.h", 
       "test/cpp/qps/report.h", 
       "test/cpp/qps/server.h", 
@@ -4565,6 +4596,8 @@
       "test/cpp/qps/interarrival.h", 
       "test/cpp/qps/limit_cores.cc", 
       "test/cpp/qps/limit_cores.h", 
+      "test/cpp/qps/parse_json.cc", 
+      "test/cpp/qps/parse_json.h", 
       "test/cpp/qps/qps_worker.cc", 
       "test/cpp/qps/qps_worker.h", 
       "test/cpp/qps/report.cc", 
@@ -5597,6 +5630,7 @@
       "include/grpc/byte_buffer_reader.h", 
       "include/grpc/compression.h", 
       "include/grpc/grpc.h", 
+      "include/grpc/grpc_posix.h", 
       "include/grpc/status.h", 
       "src/core/lib/channel/channel_args.h", 
       "src/core/lib/channel/channel_stack.h", 
@@ -5681,6 +5715,7 @@
       "include/grpc/byte_buffer_reader.h", 
       "include/grpc/compression.h", 
       "include/grpc/grpc.h", 
+      "include/grpc/grpc_posix.h", 
       "include/grpc/status.h", 
       "src/core/lib/channel/channel_args.c", 
       "src/core/lib/channel/channel_args.h", 
@@ -5698,7 +5733,7 @@
       "src/core/lib/channel/http_server_filter.c", 
       "src/core/lib/channel/http_server_filter.h", 
       "src/core/lib/compression/algorithm_metadata.h", 
-      "src/core/lib/compression/compression_algorithm.c", 
+      "src/core/lib/compression/compression.c", 
       "src/core/lib/compression/message_compress.c", 
       "src/core/lib/compression/message_compress.h", 
       "src/core/lib/debug/trace.c", 
@@ -6269,7 +6304,8 @@
     "language": "c", 
     "name": "grpc_transport_chttp2_client_insecure", 
     "src": [
-      "src/core/ext/transport/chttp2/client/insecure/channel_create.c"
+      "src/core/ext/transport/chttp2/client/insecure/channel_create.c", 
+      "src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c"
     ], 
     "third_party": false, 
     "type": "filegroup"
@@ -6301,7 +6337,8 @@
     "language": "c", 
     "name": "grpc_transport_chttp2_server_insecure", 
     "src": [
-      "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c"
+      "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c", 
+      "src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.c"
     ], 
     "third_party": false, 
     "type": "filegroup"
@@ -6397,6 +6434,7 @@
       "include/grpc++/client_context.h", 
       "include/grpc++/completion_queue.h", 
       "include/grpc++/create_channel.h", 
+      "include/grpc++/create_channel_posix.h", 
       "include/grpc++/generic/async_generic_service.h", 
       "include/grpc++/generic/generic_stub.h", 
       "include/grpc++/grpc++.h", 
@@ -6425,6 +6463,7 @@
       "include/grpc++/server.h", 
       "include/grpc++/server_builder.h", 
       "include/grpc++/server_context.h", 
+      "include/grpc++/server_posix.h", 
       "include/grpc++/support/async_stream.h", 
       "include/grpc++/support/async_unary_call.h", 
       "include/grpc++/support/byte_buffer.h", 
@@ -6449,6 +6488,7 @@
       "include/grpc++/client_context.h", 
       "include/grpc++/completion_queue.h", 
       "include/grpc++/create_channel.h", 
+      "include/grpc++/create_channel_posix.h", 
       "include/grpc++/generic/async_generic_service.h", 
       "include/grpc++/generic/generic_stub.h", 
       "include/grpc++/grpc++.h", 
@@ -6477,6 +6517,7 @@
       "include/grpc++/server.h", 
       "include/grpc++/server_builder.h", 
       "include/grpc++/server_context.h", 
+      "include/grpc++/server_posix.h", 
       "include/grpc++/support/async_stream.h", 
       "include/grpc++/support/async_unary_call.h", 
       "include/grpc++/support/byte_buffer.h", 
@@ -6494,6 +6535,7 @@
       "src/cpp/client/create_channel.cc", 
       "src/cpp/client/create_channel_internal.cc", 
       "src/cpp/client/create_channel_internal.h", 
+      "src/cpp/client/create_channel_posix.cc", 
       "src/cpp/client/credentials.cc", 
       "src/cpp/client/generic_stub.cc", 
       "src/cpp/client/insecure_credentials.cc", 
@@ -6510,6 +6552,7 @@
       "src/cpp/server/server_builder.cc", 
       "src/cpp/server/server_context.cc", 
       "src/cpp/server/server_credentials.cc", 
+      "src/cpp/server/server_posix.cc", 
       "src/cpp/server/thread_pool_interface.h", 
       "src/cpp/util/byte_buffer.cc", 
       "src/cpp/util/slice.cc", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 1ac87e2..59933e3 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -6784,6 +6784,666 @@
       "bad_hostname"
     ], 
     "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "binary_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "call_creds"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_accept"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_client_done"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_invoke"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_before_invoke"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_in_a_vacuum"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_with_status"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "compressed_payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "empty_batch"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "filter_causes_close"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "graceful_server_shutdown"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "high_initial_seqno"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "hpack_size"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "idempotent_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "invoke_large_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "large_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_concurrent_streams"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_message_length"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "negative_deadline"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "no_op"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "ping_pong_streaming"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "registered_call"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_flags"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "server_finishes_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "shutdown_finishes_calls"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "shutdown_finishes_tags"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "trailing_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_hostname"
+    ], 
+    "ci_platforms": [
       "windows", 
       "linux", 
       "mac", 
@@ -18118,6 +18778,646 @@
       "bad_hostname"
     ], 
     "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "binary_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_accept"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_client_done"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_invoke"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_before_invoke"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_in_a_vacuum"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_with_status"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "compressed_payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "empty_batch"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "filter_causes_close"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "graceful_server_shutdown"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "high_initial_seqno"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "hpack_size"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "idempotent_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "invoke_large_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "large_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_concurrent_streams"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_message_length"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "negative_deadline"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "no_op"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "ping_pong_streaming"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "registered_call"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_flags"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_payload"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "server_finishes_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "shutdown_finishes_calls"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "shutdown_finishes_tags"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_request"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "trailing_metadata"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_hostname"
+    ], 
+    "ci_platforms": [
       "windows", 
       "linux", 
       "mac", 
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index 95c7f71..cb9e41e 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -263,6 +263,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\client_context.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\completion_queue.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\async_generic_service.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\generic_stub.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\grpc++.h" />
@@ -291,6 +292,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_builder.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\byte_buffer.h" />
@@ -385,6 +387,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_posix.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\credentials.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\generic_stub.cc">
@@ -415,6 +419,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_credentials.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_posix.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\byte_buffer.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\slice.cc">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index 89d1b34..a905118 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -31,6 +31,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.cc">
       <Filter>src\cpp\client</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_posix.cc">
+      <Filter>src\cpp\client</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\credentials.cc">
       <Filter>src\cpp\client</Filter>
     </ClCompile>
@@ -76,6 +79,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_posix.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\byte_buffer.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
@@ -111,6 +117,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel_posix.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\async_generic_service.h">
       <Filter>include\grpc++\generic</Filter>
     </ClInclude>
@@ -195,6 +204,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_context.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_posix.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_stream.h">
       <Filter>include\grpc++\support</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index 6a96ec8..03be485 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -263,6 +263,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\client_context.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\completion_queue.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\async_generic_service.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\generic_stub.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\grpc++.h" />
@@ -291,6 +292,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_builder.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\byte_buffer.h" />
@@ -371,6 +373,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_posix.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\credentials.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\generic_stub.cc">
@@ -401,6 +405,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_credentials.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_posix.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\byte_buffer.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\slice.cc">
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index cd481ff..ba99bc5 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -16,6 +16,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.cc">
       <Filter>src\cpp\client</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\client\create_channel_posix.cc">
+      <Filter>src\cpp\client</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\client\credentials.cc">
       <Filter>src\cpp\client</Filter>
     </ClCompile>
@@ -61,6 +64,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\server\server_posix.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\byte_buffer.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
@@ -96,6 +102,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\create_channel_posix.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\generic\async_generic_service.h">
       <Filter>include\grpc++\generic</Filter>
     </ClInclude>
@@ -180,6 +189,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_context.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\server_posix.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\async_stream.h">
       <Filter>include\grpc++\support</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 2e8e7ca..1824b92 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -271,6 +271,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\compression.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
@@ -466,7 +467,7 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\channel\http_server_filter.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression_algorithm.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\message_compress.c">
     </ClCompile>
@@ -760,8 +761,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v1\load_balancer.pb.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 4d58c8e..e77b79e 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -25,7 +25,7 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\channel\http_server_filter.c">
       <Filter>src\core\lib\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression_algorithm.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression.c">
       <Filter>src\core\lib\compression</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\message_compress.c">
@@ -466,9 +466,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
       <Filter>src\core\ext\transport\chttp2\server\insecure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2_posix.c">
+      <Filter>src\core\ext\transport\chttp2\server\insecure</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
       <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create_posix.c">
+      <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
       <Filter>src\core\ext\lb_policy\grpclb</Filter>
     </ClCompile>
@@ -549,6 +555,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h">
+      <Filter>include\grpc</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 5f7bc88..bc5b153 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -262,6 +262,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\compression.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
@@ -434,7 +435,7 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\channel\http_server_filter.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression_algorithm.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\message_compress.c">
     </ClCompile>
@@ -588,6 +589,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_plugin.c">
@@ -634,6 +637,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\client_config\channel_connectivity.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\client_config\client_channel.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 5006ac7..792a2db 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -28,7 +28,7 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\channel\http_server_filter.c">
       <Filter>src\core\lib\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression_algorithm.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\compression.c">
       <Filter>src\core\lib\compression</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\compression\message_compress.c">
@@ -259,6 +259,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
       <Filter>src\core\ext\transport\chttp2\server\insecure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2_posix.c">
+      <Filter>src\core\ext\transport\chttp2\server\insecure</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClCompile>
@@ -328,6 +331,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
       <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create_posix.c">
+      <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\client_config\channel_connectivity.c">
       <Filter>src\core\ext\client_config</Filter>
     </ClCompile>
@@ -465,6 +471,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h">
+      <Filter>include\grpc</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/qps/qps.vcxproj b/vsprojects/vcxproj/qps/qps.vcxproj
index 3241362..004cf7c 100644
--- a/vsprojects/vcxproj/qps/qps.vcxproj
+++ b/vsprojects/vcxproj/qps/qps.vcxproj
@@ -152,6 +152,7 @@
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\histogram.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\interarrival.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\limit_cores.h" />
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\parse_json.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\qps_worker.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\report.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\server.h" />
@@ -208,6 +209,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\limit_cores.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\parse_json.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\qps_worker.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\report.cc">
diff --git a/vsprojects/vcxproj/qps/qps.vcxproj.filters b/vsprojects/vcxproj/qps/qps.vcxproj.filters
index 54d438f..d3a440b 100644
--- a/vsprojects/vcxproj/qps/qps.vcxproj.filters
+++ b/vsprojects/vcxproj/qps/qps.vcxproj.filters
@@ -28,6 +28,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\limit_cores.cc">
       <Filter>test\cpp\qps</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\parse_json.cc">
+      <Filter>test\cpp\qps</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\qps_worker.cc">
       <Filter>test\cpp\qps</Filter>
     </ClCompile>
@@ -63,6 +66,9 @@
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\limit_cores.h">
       <Filter>test\cpp\qps</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\parse_json.h">
+      <Filter>test\cpp\qps</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\qps_worker.h">
       <Filter>test\cpp\qps</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj b/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj
index 3884c10..d1dea3e 100644
--- a/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj
+++ b/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj
@@ -160,11 +160,6 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\parse_json.h" />
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\parse_json.cc">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\qps_json_driver.cc">
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj.filters b/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj.filters
index cde967f..62b9be8 100644
--- a/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj.filters
+++ b/vsprojects/vcxproj/test/qps_json_driver/qps_json_driver.vcxproj.filters
@@ -1,18 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\parse_json.cc">
-      <Filter>test\cpp\qps</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\qps\qps_json_driver.cc">
       <Filter>test\cpp\qps</Filter>
     </ClCompile>
   </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="$(SolutionDir)\..\test\cpp\qps\parse_json.h">
-      <Filter>test\cpp\qps</Filter>
-    </ClInclude>
-  </ItemGroup>
 
   <ItemGroup>
     <Filter Include="test">