diff --git a/Makefile b/Makefile
index d98202db01faa0f6509edd2d4e45d8223bbaaca7..4c3f3bc943e21921822471e4c61af6840b2f82c6 100644
--- a/Makefile
+++ b/Makefile
@@ -2002,92 +2002,152 @@ endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/examples/pubsub/empty.pb.cc: protoc_dep_error
+$(GENDIR)/examples/pubsub/empty.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/examples/pubsub/empty.pb.cc: examples/pubsub/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/examples/pubsub/empty.grpc.pb.cc: examples/pubsub/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/examples/pubsub/label.pb.cc: protoc_dep_error
+$(GENDIR)/examples/pubsub/label.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/examples/pubsub/label.pb.cc: examples/pubsub/label.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/examples/pubsub/label.grpc.pb.cc: examples/pubsub/label.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/examples/pubsub/pubsub.pb.cc: protoc_dep_error
+$(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/examples/pubsub/pubsub.pb.cc: examples/pubsub/pubsub.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc: examples/pubsub/pubsub.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/interop/empty.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/interop/empty.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/interop/empty.pb.cc: test/cpp/interop/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/interop/empty.grpc.pb.cc: test/cpp/interop/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/interop/messages.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/interop/messages.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/interop/messages.pb.cc: test/cpp/interop/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/interop/messages.grpc.pb.cc: test/cpp/interop/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/interop/test.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/interop/test.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/interop/test.pb.cc: test/cpp/interop/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/interop/test.grpc.pb.cc: test/cpp/interop/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/qps/qpstest.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/qps/qpstest.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/util/echo.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/util/echo.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/test/cpp/util/messages.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/test/cpp/util/messages.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 
@@ -3418,9 +3478,9 @@ $(OBJDIR)/$(CONFIG)/src/cpp/util/time.o:
 
 
 LIBGRPC++_TEST_UTIL_SRC = \
-    $(GENDIR)/test/cpp/util/messages.pb.cc \
-    $(GENDIR)/test/cpp/util/echo.pb.cc \
-    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc \
+    $(GENDIR)/test/cpp/util/messages.pb.cc $(GENDIR)/test/cpp/util/messages.grpc.pb.cc \
+    $(GENDIR)/test/cpp/util/echo.pb.cc $(GENDIR)/test/cpp/util/echo.grpc.pb.cc \
+    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc $(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc \
     test/cpp/util/cli_call.cc \
     test/cpp/util/create_test_channel.cc \
 
@@ -3481,8 +3541,8 @@ endif
 
 
 
-$(OBJDIR)/$(CONFIG)/test/cpp/util/cli_call.o:     $(GENDIR)/test/cpp/util/messages.pb.cc    $(GENDIR)/test/cpp/util/echo.pb.cc    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc
-$(OBJDIR)/$(CONFIG)/test/cpp/util/create_test_channel.o:     $(GENDIR)/test/cpp/util/messages.pb.cc    $(GENDIR)/test/cpp/util/echo.pb.cc    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/util/cli_call.o:     $(GENDIR)/test/cpp/util/messages.pb.cc $(GENDIR)/test/cpp/util/messages.grpc.pb.cc    $(GENDIR)/test/cpp/util/echo.pb.cc $(GENDIR)/test/cpp/util/echo.grpc.pb.cc    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc $(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/util/create_test_channel.o:     $(GENDIR)/test/cpp/util/messages.pb.cc $(GENDIR)/test/cpp/util/messages.grpc.pb.cc    $(GENDIR)/test/cpp/util/echo.pb.cc $(GENDIR)/test/cpp/util/echo.grpc.pb.cc    $(GENDIR)/test/cpp/util/echo_duplicate.pb.cc $(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc
 
 
 LIBGRPC++_UNSECURE_SRC = \
@@ -3659,9 +3719,9 @@ $(OBJDIR)/$(CONFIG)/src/compiler/ruby_generator.o:
 
 
 LIBPUBSUB_CLIENT_LIB_SRC = \
-    $(GENDIR)/examples/pubsub/label.pb.cc \
-    $(GENDIR)/examples/pubsub/empty.pb.cc \
-    $(GENDIR)/examples/pubsub/pubsub.pb.cc \
+    $(GENDIR)/examples/pubsub/label.pb.cc $(GENDIR)/examples/pubsub/label.grpc.pb.cc \
+    $(GENDIR)/examples/pubsub/empty.pb.cc $(GENDIR)/examples/pubsub/empty.grpc.pb.cc \
+    $(GENDIR)/examples/pubsub/pubsub.pb.cc $(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc \
     examples/pubsub/publisher.cc \
     examples/pubsub/subscriber.cc \
 
@@ -3722,12 +3782,12 @@ endif
 
 
 
-$(OBJDIR)/$(CONFIG)/examples/pubsub/publisher.o:     $(GENDIR)/examples/pubsub/label.pb.cc    $(GENDIR)/examples/pubsub/empty.pb.cc    $(GENDIR)/examples/pubsub/pubsub.pb.cc
-$(OBJDIR)/$(CONFIG)/examples/pubsub/subscriber.o:     $(GENDIR)/examples/pubsub/label.pb.cc    $(GENDIR)/examples/pubsub/empty.pb.cc    $(GENDIR)/examples/pubsub/pubsub.pb.cc
+$(OBJDIR)/$(CONFIG)/examples/pubsub/publisher.o:     $(GENDIR)/examples/pubsub/label.pb.cc $(GENDIR)/examples/pubsub/label.grpc.pb.cc    $(GENDIR)/examples/pubsub/empty.pb.cc $(GENDIR)/examples/pubsub/empty.grpc.pb.cc    $(GENDIR)/examples/pubsub/pubsub.pb.cc $(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/examples/pubsub/subscriber.o:     $(GENDIR)/examples/pubsub/label.pb.cc $(GENDIR)/examples/pubsub/label.grpc.pb.cc    $(GENDIR)/examples/pubsub/empty.pb.cc $(GENDIR)/examples/pubsub/empty.grpc.pb.cc    $(GENDIR)/examples/pubsub/pubsub.pb.cc $(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc
 
 
 LIBQPS_SRC = \
-    $(GENDIR)/test/cpp/qps/qpstest.pb.cc \
+    $(GENDIR)/test/cpp/qps/qpstest.pb.cc $(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc \
     test/cpp/qps/driver.cc \
     test/cpp/qps/report.cc \
     test/cpp/qps/timer.cc \
@@ -3786,9 +3846,9 @@ endif
 endif
 
 
-$(OBJDIR)/$(CONFIG)/test/cpp/qps/driver.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc
-$(OBJDIR)/$(CONFIG)/test/cpp/qps/report.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc
-$(OBJDIR)/$(CONFIG)/test/cpp/qps/timer.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/driver.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc $(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/report.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc $(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/timer.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc $(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc
 
 
 LIBGRPC_CSHARP_EXT_SRC = \
@@ -8430,9 +8490,9 @@ endif
 
 
 INTEROP_CLIENT_SRC = \
-    $(GENDIR)/test/cpp/interop/empty.pb.cc \
-    $(GENDIR)/test/cpp/interop/messages.pb.cc \
-    $(GENDIR)/test/cpp/interop/test.pb.cc \
+    $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc \
+    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc \
+    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc \
     test/cpp/interop/client.cc \
 
 INTEROP_CLIENT_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INTEROP_CLIENT_SRC))))
@@ -8478,9 +8538,9 @@ endif
 
 
 INTEROP_SERVER_SRC = \
-    $(GENDIR)/test/cpp/interop/empty.pb.cc \
-    $(GENDIR)/test/cpp/interop/messages.pb.cc \
-    $(GENDIR)/test/cpp/interop/test.pb.cc \
+    $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc \
+    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc \
+    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc \
     test/cpp/interop/server.cc \
 
 INTEROP_SERVER_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INTEROP_SERVER_SRC))))
diff --git a/examples/pubsub/publisher.h b/examples/pubsub/publisher.h
index c90406ffef8df438949482c80e5dd8fb1861a8fa..33bcf98df48a19937ed0c3e0e28dc5229abb14df 100644
--- a/examples/pubsub/publisher.h
+++ b/examples/pubsub/publisher.h
@@ -37,7 +37,7 @@
 #include <grpc++/channel_interface.h>
 #include <grpc++/status.h>
 
-#include "examples/pubsub/pubsub.pb.h"
+#include "examples/pubsub/pubsub.grpc.pb.h"
 
 namespace grpc {
 namespace examples {
diff --git a/examples/pubsub/subscriber.h b/examples/pubsub/subscriber.h
index c587c01b8256f2163977fff29e49602e10e0e2eb..40ab45471d5e7ada2b115d869f993f121ea7dfa1 100644
--- a/examples/pubsub/subscriber.h
+++ b/examples/pubsub/subscriber.h
@@ -37,7 +37,7 @@
 #include <grpc++/channel_interface.h>
 #include <grpc++/status.h>
 
-#include "examples/pubsub/pubsub.pb.h"
+#include "examples/pubsub/pubsub.grpc.pb.h"
 
 namespace grpc {
 namespace examples {
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index 0a84c7352007f175c26d17c95cd4fa5e8c0af6e4..c78f0333d899314f03bf71291792d61483f12039 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -109,8 +109,47 @@ bool HasBidiStreaming(const grpc::protobuf::FileDescriptor *file) {
   }
   return false;
 }
+
+grpc::string FilenameIdentifier(const grpc::string& filename) {
+  grpc::string result;
+  for (unsigned i = 0; i < filename.size(); i++) {
+    char c = filename[i];
+    if (isalnum(c)) {
+      result.push_back(c);
+    } else {
+      static char hex[] = "0123456789abcdef";
+      result.push_back('_');
+      result.push_back(hex[(c >> 4) & 0xf]);
+      result.push_back(hex[c & 0xf]);
+    }
+  }
+  return result;
+}
 }  // namespace
 
+grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params) {
+  grpc::string output;
+  grpc::protobuf::io::StringOutputStream output_stream(&output);
+  grpc::protobuf::io::Printer printer(&output_stream, '$');
+  std::map<grpc::string, grpc::string> vars;
+
+  vars["filename"] = file->name();
+  vars["filename_identifier"] = FilenameIdentifier(file->name());
+  vars["filename_base"] = grpc_generator::StripProto(file->name());
+
+  printer.Print(vars, "// Generated by the gRPC protobuf plugin.\n");
+  printer.Print(vars, "// If you make any local change, they will be lost.\n");
+  printer.Print(vars, "// source: $filename$\n");
+  printer.Print(vars, "#ifndef GRPC_$filename_identifier$__INCLUDED\n");
+  printer.Print(vars, "#define GRPC_$filename_identifier$__INCLUDED\n");
+  printer.Print(vars, "\n");
+  printer.Print(vars, "#include \"$filename_base$.pb.h\"\n");
+  printer.Print(vars, "\n");
+
+  return output;
+}
+
 grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params) {
   grpc::string temp =
@@ -156,17 +195,21 @@ grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
         "class ServerAsyncReaderWriter;\n");
   }
   temp.append("}  // namespace grpc\n");
-  return temp;
-}
 
-grpc::string GetSourceIncludes(const Parameters &param) {
-  return "#include <grpc++/async_unary_call.h>\n"
-         "#include <grpc++/channel_interface.h>\n"
-         "#include <grpc++/impl/client_unary_call.h>\n"
-         "#include <grpc++/impl/rpc_method.h>\n"
-         "#include <grpc++/impl/rpc_service_method.h>\n"
-         "#include <grpc++/impl/service_type.h>\n"
-         "#include <grpc++/stream.h>\n";
+  temp.append("\n");
+
+  std::vector<grpc::string> parts =
+    grpc_generator::tokenize(file->package(), ".");
+
+  for (auto part = parts.begin(); part != parts.end(); part++) {
+    temp.append("namespace ");
+    temp.append(*part);
+    temp.append(" {\n");
+  }
+
+  temp.append("\n");
+
+  return temp;
 }
 
 void PrintHeaderClientMethod(grpc::protobuf::io::Printer *printer,
@@ -378,6 +421,78 @@ grpc::string GetHeaderServices(const grpc::protobuf::FileDescriptor *file,
   return output;
 }
 
+grpc::string GetHeaderEpilogue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params) {
+  grpc::string output;
+  grpc::protobuf::io::StringOutputStream output_stream(&output);
+  grpc::protobuf::io::Printer printer(&output_stream, '$');
+  std::map<grpc::string, grpc::string> vars;
+
+  vars["filename"] = file->name();
+  vars["filename_identifier"] = FilenameIdentifier(file->name());
+
+  std::vector<grpc::string> parts =
+    grpc_generator::tokenize(file->package(), ".");
+
+  for (auto part = parts.rbegin(); part != parts.rend(); part++) {
+    vars["part"] = *part;
+    printer.Print(vars, "}  // namespace $part$\n");
+  }
+
+  printer.Print(vars, "\n\n");
+  printer.Print(vars, "#endif  // GRPC_$filename_identifier$__INCLUDED\n");
+
+  return output;
+}
+
+grpc::string GetSourcePrologue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params) {
+  grpc::string output;
+  grpc::protobuf::io::StringOutputStream output_stream(&output);
+  grpc::protobuf::io::Printer printer(&output_stream, '$');
+  std::map<grpc::string, grpc::string> vars;
+
+  vars["filename"] = file->name();
+  vars["filename_base"] = grpc_generator::StripProto(file->name());
+
+  printer.Print(vars, "// Generated by the gRPC protobuf plugin.\n");
+  printer.Print(vars, "// If you make any local change, they will be lost.\n");
+  printer.Print(vars, "// source: $filename$\n\n");
+  printer.Print(vars, "#include \"$filename_base$.pb.h\"\n");
+  printer.Print(vars, "#include \"$filename_base$.grpc.pb.h\"\n");
+  printer.Print(vars, "\n");
+
+  return output;
+}
+
+grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &param) {
+  grpc::string output;
+  grpc::protobuf::io::StringOutputStream output_stream(&output);
+  grpc::protobuf::io::Printer printer(&output_stream, '$');
+  std::map<grpc::string, grpc::string> vars;
+
+  printer.Print(vars, "#include <grpc++/async_unary_call.h>\n");
+  printer.Print(vars, "#include <grpc++/channel_interface.h>\n");
+  printer.Print(vars, "#include <grpc++/impl/client_unary_call.h>\n");
+  printer.Print(vars, "#include <grpc++/impl/rpc_method.h>\n");
+  printer.Print(vars, "#include <grpc++/impl/rpc_service_method.h>\n");
+  printer.Print(vars, "#include <grpc++/impl/service_type.h>\n");
+  printer.Print(vars, "#include <grpc++/stream.h>\n");
+
+  std::vector<grpc::string> parts =
+    grpc_generator::tokenize(file->package(), ".");
+
+  for (auto part = parts.begin(); part != parts.end(); part++) {
+    vars["part"] = *part;
+    printer.Print(vars, "namespace $part$ {\n");
+  }
+
+  printer.Print(vars, "\n");
+
+  return output;
+}
+
 void PrintSourceClientMethod(grpc::protobuf::io::Printer *printer,
                              const grpc::protobuf::MethodDescriptor *method,
                              std::map<grpc::string, grpc::string> *vars) {
@@ -741,4 +856,22 @@ grpc::string GetSourceServices(const grpc::protobuf::FileDescriptor *file,
   return output;
 }
 
+grpc::string GetSourceEpilogue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params) {
+  grpc::string temp;
+
+  std::vector<grpc::string> parts =
+    grpc_generator::tokenize(file->package(), ".");
+
+  for (auto part = parts.begin(); part != parts.end(); part++) {
+    temp.append("}  // namespace ");
+    temp.append(*part);
+    temp.append("\n");
+  }
+
+  temp.append("\n");
+
+  return temp;
+}
+
 }  // namespace grpc_cpp_generator
diff --git a/src/compiler/cpp_generator.h b/src/compiler/cpp_generator.h
index 04ad71c0673336352b1a60e408d99df6c8d0f403..70c2e985f6b87e513de9ea1bf43c8519cdeb0415 100644
--- a/src/compiler/cpp_generator.h
+++ b/src/compiler/cpp_generator.h
@@ -44,12 +44,25 @@ struct Parameters {
   grpc::string services_namespace;
 };
 
+// Return the prologue of the generated header file.
+grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params);
+
 // Return the includes needed for generated header file.
 grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params);
 
 // Return the includes needed for generated source file.
-grpc::string GetSourceIncludes(const Parameters &params);
+grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params);
+
+// Return the epilogue of the generated header file.
+grpc::string GetHeaderEpilogue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params);
+
+// Return the prologue of the generated source file.
+grpc::string GetSourcePrologue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params);
 
 // Return the services for generated header file.
 grpc::string GetHeaderServices(const grpc::protobuf::FileDescriptor *file,
@@ -59,6 +72,10 @@ grpc::string GetHeaderServices(const grpc::protobuf::FileDescriptor *file,
 grpc::string GetSourceServices(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params);
 
+// Return the epilogue of the generated source file.
+grpc::string GetSourceEpilogue(const grpc::protobuf::FileDescriptor *file,
+                               const Parameters &params);
+
 }  // namespace grpc_cpp_generator
 
 #endif  // GRPC_INTERNAL_COMPILER_CPP_GENERATOR_H
diff --git a/src/compiler/cpp_plugin.cc b/src/compiler/cpp_plugin.cc
index acbe128213a2b34faf97d59f7c7d3e09d171b5d9..88c704948ecc59aa5f8952b63145c691386ce7be 100644
--- a/src/compiler/cpp_plugin.cc
+++ b/src/compiler/cpp_plugin.cc
@@ -58,11 +58,6 @@ class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
       return false;
     }
 
-    if (file->service_count() == 0) {
-      // No services.  Do nothing.
-      return true;
-    }
-
     grpc_cpp_generator::Parameters generator_parameters;
 
     if (!parameter.empty()) {
@@ -84,16 +79,27 @@ class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
 
     grpc::string file_name = grpc_generator::StripProto(file->name());
 
-    // Generate .pb.h
-    Insert(context, file_name + ".pb.h", "includes",
-           grpc_cpp_generator::GetHeaderIncludes(file, generator_parameters));
-    Insert(context, file_name + ".pb.h", "namespace_scope",
-           grpc_cpp_generator::GetHeaderServices(file, generator_parameters));
-    // Generate .pb.cc
-    Insert(context, file_name + ".pb.cc", "includes",
-           grpc_cpp_generator::GetSourceIncludes(generator_parameters));
-    Insert(context, file_name + ".pb.cc", "namespace_scope",
-           grpc_cpp_generator::GetSourceServices(file, generator_parameters));
+    grpc::string header_code =
+        grpc_cpp_generator::GetHeaderPrologue(file, generator_parameters) +
+        grpc_cpp_generator::GetHeaderIncludes(file, generator_parameters) +
+        grpc_cpp_generator::GetHeaderServices(file, generator_parameters) +
+        grpc_cpp_generator::GetHeaderEpilogue(file, generator_parameters);
+    std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> header_output(
+        context->Open(file_name + ".grpc.pb.h"));
+    grpc::protobuf::io::CodedOutputStream header_coded_out(
+        header_output.get());
+    header_coded_out.WriteRaw(header_code.data(), header_code.size());
+
+    grpc::string source_code =
+        grpc_cpp_generator::GetSourcePrologue(file, generator_parameters) +
+        grpc_cpp_generator::GetSourceIncludes(file, generator_parameters) +
+        grpc_cpp_generator::GetSourceServices(file, generator_parameters) +
+        grpc_cpp_generator::GetSourceEpilogue(file, generator_parameters);
+    std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> source_output(
+        context->Open(file_name + ".grpc.pb.cc"));
+    grpc::protobuf::io::CodedOutputStream source_coded_out(
+        source_output.get());
+    source_coded_out.WriteRaw(source_code.data(), source_code.size());
 
     return true;
   }
diff --git a/src/core/iomgr/tcp_server.h b/src/core/iomgr/tcp_server.h
index 68ee85c5a7f538b6e81eaabe6ace7da6b19ed56c..66bb3ef70184dd871bd828d87c950b3e1c0cda3b 100644
--- a/src/core/iomgr/tcp_server.h
+++ b/src/core/iomgr/tcp_server.h
@@ -71,6 +71,8 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
    up when grpc_tcp_server_destroy is called. */
 int grpc_tcp_server_get_fd(grpc_tcp_server *s, unsigned index);
 
-void grpc_tcp_server_destroy(grpc_tcp_server *server);
+void grpc_tcp_server_destroy(grpc_tcp_server *server,
+                             void (*shutdown_done)(void *shutdown_done_arg),
+                             void *shutdown_done_arg);
 
-#endif  /* GRPC_INTERNAL_CORE_IOMGR_TCP_SERVER_H */
+#endif /* GRPC_INTERNAL_CORE_IOMGR_TCP_SERVER_H */
diff --git a/src/core/iomgr/tcp_server_posix.c b/src/core/iomgr/tcp_server_posix.c
index 90b7eb451d4159cbdac680af6558e61d51d8d457..895f85fc68273e7ac6a9d9697da948138f007299 100644
--- a/src/core/iomgr/tcp_server_posix.c
+++ b/src/core/iomgr/tcp_server_posix.c
@@ -102,12 +102,18 @@ struct grpc_tcp_server {
   gpr_cv cv;
 
   /* active port count: how many ports are actually still listening */
-  int active_ports;
+  size_t active_ports;
+  /* destroyed port count: how many ports are completely destroyed */
+  size_t destroyed_ports;
 
   /* all listening ports */
   server_port *ports;
   size_t nports;
   size_t port_capacity;
+
+  /* shutdown callback */
+  void (*shutdown_complete)(void *);
+  void *shutdown_complete_arg;
 };
 
 grpc_tcp_server *grpc_tcp_server_create(void) {
@@ -115,6 +121,7 @@ grpc_tcp_server *grpc_tcp_server_create(void) {
   gpr_mu_init(&s->mu);
   gpr_cv_init(&s->cv);
   s->active_ports = 0;
+  s->destroyed_ports = 0;
   s->cb = NULL;
   s->cb_arg = NULL;
   s->ports = gpr_malloc(sizeof(server_port) * INIT_PORT_CAP);
@@ -123,29 +130,64 @@ grpc_tcp_server *grpc_tcp_server_create(void) {
   return s;
 }
 
-void grpc_tcp_server_destroy(grpc_tcp_server *s) {
+static void finish_shutdown(grpc_tcp_server *s) {
+  s->shutdown_complete(s->shutdown_complete_arg);
+
+  gpr_mu_destroy(&s->mu);
+  gpr_cv_destroy(&s->cv);
+
+  gpr_free(s->ports);
+  gpr_free(s);
+}
+
+static void destroyed_port(void *server, int success) {
+  grpc_tcp_server *s = server;
+  gpr_mu_lock(&s->mu);
+  s->destroyed_ports++;
+  if (s->destroyed_ports == s->nports) {
+    gpr_mu_unlock(&s->mu);
+    finish_shutdown(s);
+  } else {
+    gpr_mu_unlock(&s->mu);
+  }
+}
+
+static void dont_care_about_shutdown_completion(void *ignored) {}
+
+void grpc_tcp_server_destroy(
+    grpc_tcp_server *s, void (*shutdown_complete)(void *shutdown_complete_arg),
+    void *shutdown_complete_arg) {
   size_t i;
   gpr_mu_lock(&s->mu);
+
+  s->shutdown_complete = shutdown_complete
+                             ? shutdown_complete
+                             : dont_care_about_shutdown_completion;
+  s->shutdown_complete_arg = shutdown_complete_arg;
+
   /* shutdown all fd's */
   for (i = 0; i < s->nports; i++) {
     grpc_fd_shutdown(s->ports[i].emfd);
   }
   /* wait while that happens */
+  /* TODO(ctiller): make this asynchronous also */
   while (s->active_ports) {
     gpr_cv_wait(&s->cv, &s->mu, gpr_inf_future);
   }
   gpr_mu_unlock(&s->mu);
 
   /* delete ALL the things */
-  for (i = 0; i < s->nports; i++) {
-    server_port *sp = &s->ports[i];
-    if (sp->addr.sockaddr.sa_family == AF_UNIX) {
-      unlink_if_unix_domain_socket(&sp->addr.un);
+  if (s->nports) {
+    for (i = 0; i < s->nports; i++) {
+      server_port *sp = &s->ports[i];
+      if (sp->addr.sockaddr.sa_family == AF_UNIX) {
+        unlink_if_unix_domain_socket(&sp->addr.un);
+      }
+      grpc_fd_orphan(sp->emfd, destroyed_port, s);
     }
-    grpc_fd_orphan(sp->emfd, NULL, NULL);
+  } else {
+    finish_shutdown(s);
   }
-  gpr_free(s->ports);
-  gpr_free(s);
 }
 
 /* get max listen queue size on linux */
diff --git a/src/core/iomgr/tcp_server_windows.c b/src/core/iomgr/tcp_server_windows.c
index 0c3ab1dc911ddf9d146836be108f048b3e111373..a43d5670a41068a93ac3df5ce670cbfcabf2a4b8 100644
--- a/src/core/iomgr/tcp_server_windows.c
+++ b/src/core/iomgr/tcp_server_windows.c
@@ -92,7 +92,9 @@ grpc_tcp_server *grpc_tcp_server_create(void) {
   return s;
 }
 
-void grpc_tcp_server_destroy(grpc_tcp_server *s) {
+void grpc_tcp_server_destroy(grpc_tcp_server *s,
+                             void (*shutdown_done)(void *shutdown_done_arg),
+                             void *shutdown_done_arg) {
   size_t i;
   gpr_mu_lock(&s->mu);
   /* shutdown all fd's */
@@ -112,11 +114,15 @@ void grpc_tcp_server_destroy(grpc_tcp_server *s) {
   }
   gpr_free(s->ports);
   gpr_free(s);
+
+  if (shutdown_done) {
+    shutdown_done(shutdown_done_arg);
+  }
 }
 
 /* Prepare a recently-created socket for listening. */
-static int prepare_socket(SOCKET sock,
-                          const struct sockaddr *addr, int addr_len) {
+static int prepare_socket(SOCKET sock, const struct sockaddr *addr,
+                          int addr_len) {
   struct sockaddr_storage sockname_temp;
   socklen_t sockname_len;
 
@@ -147,15 +153,15 @@ static int prepare_socket(SOCKET sock,
   }
 
   sockname_len = sizeof(sockname_temp);
-  if (getsockname(sock, (struct sockaddr *) &sockname_temp, &sockname_len)
-        == SOCKET_ERROR) {
+  if (getsockname(sock, (struct sockaddr *)&sockname_temp, &sockname_len) ==
+      SOCKET_ERROR) {
     char *utf8_message = gpr_format_message(WSAGetLastError());
     gpr_log(GPR_ERROR, "getsockname: %s", utf8_message);
     gpr_free(utf8_message);
     goto error;
   }
 
-  return grpc_sockaddr_get_port((struct sockaddr *) &sockname_temp);
+  return grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
 
 error:
   if (sock != INVALID_SOCKET) closesocket(sock);
@@ -221,8 +227,7 @@ static void on_accept(void *arg, int success) {
     DWORD transfered_bytes = 0;
     DWORD flags;
     BOOL wsa_success = WSAGetOverlappedResult(sock, &info->overlapped,
-                                              &transfered_bytes, FALSE,
-                                              &flags);
+                                              &transfered_bytes, FALSE, &flags);
     if (!wsa_success) {
       char *utf8_message = gpr_format_message(WSAGetLastError());
       gpr_log(GPR_ERROR, "on_accept error: %s", utf8_message);
@@ -257,9 +262,9 @@ static int add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
 
   if (sock == INVALID_SOCKET) return -1;
 
-  status = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER,
-                    &guid, sizeof(guid), &AcceptEx, sizeof(AcceptEx),
-                    &ioctl_num_bytes, NULL, NULL);
+  status =
+      WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid),
+               &AcceptEx, sizeof(AcceptEx), &ioctl_num_bytes, NULL, NULL);
 
   if (status != 0) {
     char *utf8_message = gpr_format_message(WSAGetLastError());
@@ -307,9 +312,8 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
     for (i = 0; i < s->nports; i++) {
       sockname_len = sizeof(sockname_temp);
       if (0 == getsockname(s->ports[i].socket->socket,
-                           (struct sockaddr *) &sockname_temp,
-                           &sockname_len)) {
-        port = grpc_sockaddr_get_port((struct sockaddr *) &sockname_temp);
+                           (struct sockaddr *)&sockname_temp, &sockname_len)) {
+        port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
         if (port > 0) {
           allocated_addr = malloc(addr_len);
           memcpy(allocated_addr, addr, addr_len);
@@ -330,7 +334,7 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
   if (grpc_sockaddr_is_wildcard(addr, &port)) {
     grpc_sockaddr_make_wildcard6(port, &wildcard);
 
-    addr = (struct sockaddr *) &wildcard;
+    addr = (struct sockaddr *)&wildcard;
     addr_len = sizeof(wildcard);
   }
 
@@ -369,4 +373,4 @@ void grpc_tcp_server_start(grpc_tcp_server *s, grpc_pollset **pollset,
   gpr_mu_unlock(&s->mu);
 }
 
-#endif  /* GPR_WINSOCK_SOCKET */
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index c155b80b7e6aa0b10f6f001daf73100a4dca0325..081272724cf32901de18a0a4f4dcdae96863ad5b 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -85,10 +85,10 @@ static void on_secure_transport_setup_done(void *statep,
   if (status == GRPC_SECURITY_OK) {
     gpr_mu_lock(&state->mu);
     if (!state->is_shutdown) {
-      grpc_create_chttp2_transport(
-          setup_transport, state->server,
-          grpc_server_get_channel_args(state->server),
-          secure_endpoint, NULL, 0, grpc_mdctx_create(), 0);
+      grpc_create_chttp2_transport(setup_transport, state->server,
+                                   grpc_server_get_channel_args(state->server),
+                                   secure_endpoint, NULL, 0,
+                                   grpc_mdctx_create(), 0);
     } else {
       /* We need to consume this here, because the server may already have gone
        * away. */
@@ -104,7 +104,8 @@ static void on_secure_transport_setup_done(void *statep,
 static void on_accept(void *statep, grpc_endpoint *tcp) {
   grpc_server_secure_state *state = statep;
   state_ref(state);
-  grpc_setup_secure_transport(state->ctx, tcp, on_secure_transport_setup_done, state);
+  grpc_setup_secure_transport(state->ctx, tcp, on_secure_transport_setup_done,
+                              state);
 }
 
 /* Server callback: start listening on our ports */
@@ -120,12 +121,14 @@ static void destroy(grpc_server *server, void *statep) {
   grpc_server_secure_state *state = statep;
   gpr_mu_lock(&state->mu);
   state->is_shutdown = 1;
-  grpc_tcp_server_destroy(state->tcp);
+  grpc_tcp_server_destroy(state->tcp, grpc_server_listener_destroy_done,
+                          server);
   gpr_mu_unlock(&state->mu);
   state_unref(state);
 }
 
-int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr, grpc_server_credentials *creds) {
+int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
+                                      grpc_server_credentials *creds) {
   grpc_resolved_addresses *resolved = NULL;
   grpc_tcp_server *tcp = NULL;
   grpc_server_secure_state *state = NULL;
@@ -213,7 +216,7 @@ error:
     grpc_resolved_addresses_destroy(resolved);
   }
   if (tcp) {
-    grpc_tcp_server_destroy(tcp);
+    grpc_tcp_server_destroy(tcp, NULL, NULL);
   }
   if (state) {
     gpr_free(state);
diff --git a/src/core/surface/completion_queue.c b/src/core/surface/completion_queue.c
index 6a1d83ce5d4ffee0f82d204a9d3653cbe5d1cd5d..24f4a05071a1fc18cb7b86c00741db460c1349ec 100644
--- a/src/core/surface/completion_queue.c
+++ b/src/core/surface/completion_queue.c
@@ -432,3 +432,11 @@ void grpc_cq_dump_pending_ops(grpc_completion_queue *cc) {
 grpc_pollset *grpc_cq_pollset(grpc_completion_queue *cc) {
   return &cc->pollset;
 }
+
+void grpc_cq_hack_spin_pollset(grpc_completion_queue *cc) {
+  gpr_mu_lock(GRPC_POLLSET_MU(&cc->pollset));
+  grpc_pollset_kick(&cc->pollset);
+  grpc_pollset_work(&cc->pollset,
+                    gpr_time_add(gpr_now(), gpr_time_from_millis(100)));
+  gpr_mu_unlock(GRPC_POLLSET_MU(&cc->pollset));
+}
diff --git a/src/core/surface/completion_queue.h b/src/core/surface/completion_queue.h
index 3054264cadf240c24dec759d5128e4713045da30..3a7cc99dda9c1f15a7fbfbc010a566133c574c35 100644
--- a/src/core/surface/completion_queue.h
+++ b/src/core/surface/completion_queue.h
@@ -114,4 +114,6 @@ void grpc_cq_dump_pending_ops(grpc_completion_queue *cc);
 
 grpc_pollset *grpc_cq_pollset(grpc_completion_queue *cc);
 
-#endif  /* GRPC_INTERNAL_CORE_SURFACE_COMPLETION_QUEUE_H */
+void grpc_cq_hack_spin_pollset(grpc_completion_queue *cc);
+
+#endif /* GRPC_INTERNAL_CORE_SURFACE_COMPLETION_QUEUE_H */
diff --git a/src/core/surface/server.c b/src/core/surface/server.c
index 424734c54ce5615fcbe700bb22bd834803004d82..17cba9a505b8db0f586c3b5933ddcceafcd62896 100644
--- a/src/core/surface/server.c
+++ b/src/core/surface/server.c
@@ -137,6 +137,7 @@ struct grpc_server {
   size_t cq_count;
 
   gpr_mu mu;
+  gpr_cv cv;
 
   registered_method *registered_methods;
   requested_call_array requested_calls;
@@ -149,6 +150,7 @@ struct grpc_server {
   channel_data root_channel_data;
 
   listener *listeners;
+  int listeners_destroyed;
   gpr_refcount internal_refcount;
 };
 
@@ -263,6 +265,7 @@ static void server_unref(grpc_server *server) {
   if (gpr_unref(&server->internal_refcount)) {
     grpc_channel_args_destroy(server->channel_args);
     gpr_mu_destroy(&server->mu);
+    gpr_cv_destroy(&server->cv);
     gpr_free(server->channel_filters);
     requested_call_array_destroy(&server->requested_calls);
     while ((rm = server->registered_methods) != NULL) {
@@ -589,9 +592,8 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
 }
 
 static const grpc_channel_filter server_surface_filter = {
-    call_op,           channel_op,           sizeof(call_data),
-    init_call_elem,    destroy_call_elem,    sizeof(channel_data),
-    init_channel_elem, destroy_channel_elem, "server",
+    call_op, channel_op, sizeof(call_data), init_call_elem, destroy_call_elem,
+    sizeof(channel_data), init_channel_elem, destroy_channel_elem, "server",
 };
 
 static void addcq(grpc_server *server, grpc_completion_queue *cq) {
@@ -620,6 +622,7 @@ grpc_server *grpc_server_create_from_filters(grpc_completion_queue *cq,
   if (cq) addcq(server, cq);
 
   gpr_mu_init(&server->mu);
+  gpr_cv_init(&server->cv);
 
   server->unregistered_cq = cq;
   /* decremented by grpc_server_destroy */
@@ -733,7 +736,8 @@ grpc_transport_setup_result grpc_server_setup_transport(
   channel = grpc_channel_create_from_filters(filters, num_filters,
                                              s->channel_args, mdctx, 0);
   chand = (channel_data *)grpc_channel_stack_element(
-              grpc_channel_get_channel_stack(channel), 0)->channel_data;
+              grpc_channel_get_channel_stack(channel), 0)
+              ->channel_data;
   chand->server = s;
   server_ref(s);
   chand->channel = channel;
@@ -754,7 +758,7 @@ grpc_transport_setup_result grpc_server_setup_transport(
       method = grpc_mdstr_from_string(mdctx, rm->method);
       hash = GRPC_MDSTR_KV_HASH(host ? host->hash : 0, method->hash);
       for (probes = 0; chand->registered_methods[(hash + probes) % slots]
-                               .server_registered_method != NULL;
+                           .server_registered_method != NULL;
            probes++)
         ;
       if (probes > max_probes) max_probes = probes;
@@ -781,6 +785,15 @@ grpc_transport_setup_result grpc_server_setup_transport(
   return result;
 }
 
+static int num_listeners(grpc_server *server) {
+  listener *l;
+  int n = 0;
+  for (l = server->listeners; l; l = l->next) {
+    n++;
+  }
+  return n;
+}
+
 static void shutdown_internal(grpc_server *server, gpr_uint8 have_shutdown_tag,
                               void *shutdown_tag) {
   listener *l;
@@ -878,11 +891,6 @@ static void shutdown_internal(grpc_server *server, gpr_uint8 have_shutdown_tag,
   for (l = server->listeners; l; l = l->next) {
     l->destroy(server, l->arg);
   }
-  while (server->listeners) {
-    l = server->listeners;
-    server->listeners = l->next;
-    gpr_free(l);
-  }
 }
 
 void grpc_server_shutdown(grpc_server *server) {
@@ -893,8 +901,18 @@ void grpc_server_shutdown_and_notify(grpc_server *server, void *tag) {
   shutdown_internal(server, 1, tag);
 }
 
+void grpc_server_listener_destroy_done(void *s) {
+  grpc_server *server = s;
+  gpr_mu_lock(&server->mu);
+  server->listeners_destroyed++;
+  gpr_cv_signal(&server->cv);
+  gpr_mu_unlock(&server->mu);
+}
+
 void grpc_server_destroy(grpc_server *server) {
   channel_data *c;
+  listener *l;
+  size_t i;
   gpr_mu_lock(&server->mu);
   if (!server->shutdown) {
     gpr_mu_unlock(&server->mu);
@@ -902,6 +920,23 @@ void grpc_server_destroy(grpc_server *server) {
     gpr_mu_lock(&server->mu);
   }
 
+  while (server->listeners_destroyed != num_listeners(server)) {
+    for (i = 0; i < server->cq_count; i++) {
+      gpr_mu_unlock(&server->mu);
+      grpc_cq_hack_spin_pollset(server->cqs[i]);
+      gpr_mu_lock(&server->mu);
+    }
+
+    gpr_cv_wait(&server->cv, &server->mu,
+                gpr_time_add(gpr_now(), gpr_time_from_millis(100)));
+  }
+
+  while (server->listeners) {
+    l = server->listeners;
+    server->listeners = l->next;
+    gpr_free(l);
+  }
+
   for (c = server->root_channel_data.next; c != &server->root_channel_data;
        c = c->next) {
     shutdown_channel(c);
diff --git a/src/core/surface/server.h b/src/core/surface/server.h
index e33f69b8c75c9cbf3c4076dcf651b9b5a88a92bc..2cfa38fa43661df759bb22d4ba7a127a3fa062ae 100644
--- a/src/core/surface/server.h
+++ b/src/core/surface/server.h
@@ -48,9 +48,12 @@ grpc_server *grpc_server_create_from_filters(grpc_completion_queue *cq,
    and when it shuts down, it will call destroy */
 void grpc_server_add_listener(grpc_server *server, void *listener,
                               void (*start)(grpc_server *server, void *arg,
-                                            grpc_pollset **pollsets, size_t npollsets),
+                                            grpc_pollset **pollsets,
+                                            size_t npollsets),
                               void (*destroy)(grpc_server *server, void *arg));
 
+void grpc_server_listener_destroy_done(void *server);
+
 /* Setup a transport - creates a channel stack, binds the transport to the
    server */
 grpc_transport_setup_result grpc_server_setup_transport(
@@ -60,4 +63,4 @@ grpc_transport_setup_result grpc_server_setup_transport(
 
 const grpc_channel_args *grpc_server_get_channel_args(grpc_server *server);
 
-#endif  /* GRPC_INTERNAL_CORE_SURFACE_SERVER_H */
+#endif /* GRPC_INTERNAL_CORE_SURFACE_SERVER_H */
diff --git a/src/core/surface/server_chttp2.c b/src/core/surface/server_chttp2.c
index 27434b39e2d21695a09a2500e10bcdaf65c0f0fd..f3b9219f8b0f7b7121b709165380ed3dfdd36d9a 100644
--- a/src/core/surface/server_chttp2.c
+++ b/src/core/surface/server_chttp2.c
@@ -66,7 +66,8 @@ static void new_transport(void *server, grpc_endpoint *tcp) {
 }
 
 /* Server callback: start listening on our ports */
-static void start(grpc_server *server, void *tcpp, grpc_pollset **pollsets, size_t pollset_count) {
+static void start(grpc_server *server, void *tcpp, grpc_pollset **pollsets,
+                  size_t pollset_count) {
   grpc_tcp_server *tcp = tcpp;
   grpc_tcp_server_start(tcp, pollsets, pollset_count, new_transport, server);
 }
@@ -75,7 +76,7 @@ static void start(grpc_server *server, void *tcpp, grpc_pollset **pollsets, size
    callbacks) */
 static void destroy(grpc_server *server, void *tcpp) {
   grpc_tcp_server *tcp = tcpp;
-  grpc_tcp_server_destroy(tcp);
+  grpc_tcp_server_destroy(tcp, grpc_server_listener_destroy_done, server);
 }
 
 int grpc_server_add_http2_port(grpc_server *server, const char *addr) {
@@ -131,7 +132,7 @@ error:
     grpc_resolved_addresses_destroy(resolved);
   }
   if (tcp) {
-    grpc_tcp_server_destroy(tcp);
+    grpc_tcp_server_destroy(tcp, NULL, NULL);
   }
   return 0;
 }
diff --git a/src/php/bin/generate_proto_php.sh b/src/php/bin/generate_proto_php.sh
new file mode 100755
index 0000000000000000000000000000000000000000..16f93747ab8e33c3023d3e7836e92e42cfda184e
--- /dev/null
+++ b/src/php/bin/generate_proto_php.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+# 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.
+
+
+set +e
+cd $(dirname $0)
+
+gen_code='../tests/generated_code'
+interop='../tests/interop'
+
+protoc-gen-php -i $gen_code -o $gen_code $gen_code/math.proto
+
+protoc-gen-php -i $interop -o $interop $interop/test.proto
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 6bc65b53679dd5ed87402d8ddca44431aef15f37..b1525e9246a8dfcd32689b19c404fc3f31bcb18b 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -443,8 +443,9 @@ PHP_METHOD(Call, startBatch) {
         add_property_bool(result, "send_status", true);
         break;
       case GRPC_OP_RECV_INITIAL_METADATA:
-        add_property_zval(result, "metadata",
-                          grpc_parse_metadata_array(&recv_metadata));
+        array = grpc_parse_metadata_array(&recv_metadata);
+        add_property_zval(result, "metadata", array);
+        Z_DELREF_P(array);
         break;
       case GRPC_OP_RECV_MESSAGE:
         byte_buffer_to_string(message, &message_str, &message_len);
@@ -458,11 +459,13 @@ PHP_METHOD(Call, startBatch) {
       case GRPC_OP_RECV_STATUS_ON_CLIENT:
         MAKE_STD_ZVAL(recv_status);
         object_init(recv_status);
-        add_property_zval(recv_status, "metadata",
-                          grpc_parse_metadata_array(&recv_trailing_metadata));
+        array = grpc_parse_metadata_array(&recv_trailing_metadata);
+        add_property_zval(recv_status, "metadata", array);
+        Z_DELREF_P(array);
         add_property_long(recv_status, "code", status);
         add_property_string(recv_status, "details", status_details, true);
         add_property_zval(result, "status", recv_status);
+        Z_DELREF_P(recv_status);
         break;
       case GRPC_OP_RECV_CLOSE_ON_SERVER:
         add_property_bool(result, "cancelled", cancelled);
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index 51a3eae0f4ea29bbe2e79f02a315646915ba3a81..b8262db162bf48350cd0d05919904d099aff6b1f 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -62,6 +62,7 @@ void free_wrapped_grpc_channel(void *object TSRMLS_DC) {
   if (channel->wrapped != NULL) {
     grpc_channel_destroy(channel->wrapped);
   }
+  efree(channel->target);
   efree(channel);
 }
 
diff --git a/src/python/interop/interop/_interop_test_case.py b/src/python/interop/interop/_interop_test_case.py
index fec8f1915d53972d5abe126900636f776275ffe9..cd6a574e90da1561a3a1d3a77c6e01051ca8e118 100644
--- a/src/python/interop/interop/_interop_test_case.py
+++ b/src/python/interop/interop/_interop_test_case.py
@@ -40,16 +40,16 @@ class InteropTestCase(object):
   """
 
   def testEmptyUnary(self):
-    methods.TestCase.EMPTY_UNARY.test_interoperability(self.stub)
+    methods.TestCase.EMPTY_UNARY.test_interoperability(self.stub, None)
 
   def testLargeUnary(self):
-    methods.TestCase.LARGE_UNARY.test_interoperability(self.stub)
+    methods.TestCase.LARGE_UNARY.test_interoperability(self.stub, None)
 
   def testServerStreaming(self):
-    methods.TestCase.SERVER_STREAMING.test_interoperability(self.stub)
+    methods.TestCase.SERVER_STREAMING.test_interoperability(self.stub, None)
 
   def testClientStreaming(self):
-    methods.TestCase.CLIENT_STREAMING.test_interoperability(self.stub)
+    methods.TestCase.CLIENT_STREAMING.test_interoperability(self.stub, None)
 
   def testPingPong(self):
-    methods.TestCase.PING_PONG.test_interoperability(self.stub)
+    methods.TestCase.PING_PONG.test_interoperability(self.stub, None)
diff --git a/src/python/interop/interop/client.py b/src/python/interop/interop/client.py
index 85a0dcd998361942a994942a7dd497ddc825411e..bae5e1746048c8df82e8d5ec739d58a5eaa998bb 100644
--- a/src/python/interop/interop/client.py
+++ b/src/python/interop/interop/client.py
@@ -30,6 +30,7 @@
 """The Python implementation of the GRPC interoperability test client."""
 
 import argparse
+from oauth2client import client as oauth2client_client
 
 from grpc.early_adopter import implementations
 
@@ -43,9 +44,6 @@ def _args():
   parser = argparse.ArgumentParser()
   parser.add_argument(
       '--server_host', help='the host to which to connect', type=str)
-  parser.add_argument(
-      '--server_host_override',
-      help='the server host to which to claim to connect', type=str)
   parser.add_argument(
       '--server_port', help='the port to which to connect', type=int)
   parser.add_argument(
@@ -56,10 +54,25 @@ def _args():
   parser.add_argument(
       '--use_test_ca', help='replace platform root CAs with ca.pem',
       action='store_true')
+  parser.add_argument(
+      '--server_host_override',
+      help='the server host to which to claim to connect', type=str)
+  parser.add_argument('--oauth_scope', help='scope for OAuth tokens', type=str)
+  parser.add_argument(
+      '--default_service_account',
+      help='email address of the default service account', type=str)
   return parser.parse_args()
 
+def _oauth_access_token(args):
+  credentials = client.GoogleCredentials.get_application_default()
+  scoped_credentials = credentials.create_scoped([args.oauth_scope])
+  return scoped_credentials.get_access_token().access_token
 
 def _stub(args):
+  if args.oauth_scope:
+    metadata_transformer = lambda x: [('Authorization', 'Bearer %s' % _oauth_access_token(args))]
+  else:
+    metadata_transformer = lambda x: []
   if args.use_tls:
     if args.use_test_ca:
       root_certificates = resources.test_root_certificates()
@@ -68,7 +81,8 @@ def _stub(args):
 
     stub = implementations.stub(
         methods.SERVICE_NAME, methods.CLIENT_METHODS, args.server_host,
-        args.server_port, secure=True, root_certificates=root_certificates,
+        args.server_port, metadata_transformer=metadata_transformer,
+        secure=True, root_certificates=root_certificates,
         server_host_override=args.server_host_override)
   else:
     stub = implementations.stub(
@@ -89,7 +103,7 @@ def _test_interoperability():
   args = _args()
   stub = _stub(args)
   test_case = _test_case_from_arg(args.test_case)
-  test_case.test_interoperability(stub)
+  test_case.test_interoperability(stub, args)
 
 
 if __name__ == '__main__':
diff --git a/src/python/interop/interop/methods.py b/src/python/interop/interop/methods.py
index 79550a37893f506c6e1c27e9cb55a76db0222c8b..c69771dff1ea594e83219549c03224b752f73176 100644
--- a/src/python/interop/interop/methods.py
+++ b/src/python/interop/interop/methods.py
@@ -30,8 +30,12 @@
 """Implementations of interoperability test methods."""
 
 import enum
+import json
+import os
 import threading
 
+from oauth2client import client as oauth2client_client
+
 from grpc.framework.alpha import utilities
 
 from interop import empty_pb2
@@ -150,19 +154,12 @@ SERVER_METHODS = {
 }
 
 
-def _empty_unary(stub):
-  with stub:
-    response = stub.EmptyCall(empty_pb2.Empty(), _TIMEOUT)
-    if not isinstance(response, empty_pb2.Empty):
-      raise TypeError(
-          'response is of type "%s", not empty_pb2.Empty!', type(response))
-
-
-def _large_unary(stub):
+def _large_unary_common_behavior(stub, fill_username, fill_oauth_scope):
   with stub:
     request = messages_pb2.SimpleRequest(
         response_type=messages_pb2.COMPRESSABLE, response_size=314159,
-        payload=messages_pb2.Payload(body=b'\x00' * 271828))
+        payload=messages_pb2.Payload(body=b'\x00' * 271828),
+        fill_username=fill_username, fill_oauth_scope=fill_oauth_scope)
     response_future = stub.UnaryCall.async(request, _TIMEOUT)
     response = response_future.result()
     if response.payload.type is not messages_pb2.COMPRESSABLE:
@@ -171,6 +168,19 @@ def _large_unary(stub):
     if len(response.payload.body) != 314159:
       raise ValueError(
           'response body of incorrect size %d!' % len(response.payload.body))
+    return response
+
+
+def _empty_unary(stub):
+  with stub:
+    response = stub.EmptyCall(empty_pb2.Empty(), _TIMEOUT)
+    if not isinstance(response, empty_pb2.Empty):
+      raise TypeError(
+          'response is of type "%s", not empty_pb2.Empty!', type(response))
+
+
+def _large_unary(stub):
+  _large_unary_common_behavior(stub, False, False)
 
 
 def _client_streaming(stub):
@@ -266,6 +276,28 @@ def _ping_pong(stub):
     pipe.close()
 
 
+def _compute_engine_creds(stub, args):
+  response = _large_unary_common_behavior(stub, True, True)
+  if args.default_service_account != response.username:
+    raise ValueError(
+        'expected username %s, got %s' % (args.default_service_account,
+                                          response.username))
+
+
+def _service_account_creds(stub, args):
+  json_key_filename = os.environ[
+      oauth2client_client.GOOGLE_APPLICATION_CREDENTIALS]
+  wanted_email = json.load(open(json_key_filename, 'rb'))['client_email']
+  response = _large_unary_common_behavior(stub, True, True)
+  if wanted_email != response.username:
+    raise ValueError(
+        'expected username %s, got %s' % (wanted_email, response.username))
+  if response.oauth_scope in args.oauth_scope:
+    raise ValueError(
+        'expected to find oauth scope "%s" in received "%s"' %
+            (response.oauth_scope, args.oauth_scope))
+
+
 @enum.unique
 class TestCase(enum.Enum):
   EMPTY_UNARY = 'empty_unary'
@@ -273,8 +305,10 @@ class TestCase(enum.Enum):
   SERVER_STREAMING = 'server_streaming'
   CLIENT_STREAMING = 'client_streaming'
   PING_PONG = 'ping_pong'
+  COMPUTE_ENGINE_CREDS = 'compute_engine_creds'
+  SERVICE_ACCOUNT_CREDS = 'service_account_creds'
 
-  def test_interoperability(self, stub):
+  def test_interoperability(self, stub, args):
     if self is TestCase.EMPTY_UNARY:
       _empty_unary(stub)
     elif self is TestCase.LARGE_UNARY:
@@ -285,5 +319,9 @@ class TestCase(enum.Enum):
       _client_streaming(stub)
     elif self is TestCase.PING_PONG:
       _ping_pong(stub)
+    elif self is TestCase.COMPUTE_ENGINE_CREDS:
+      _compute_engine_creds(stub, args)
+    elif self is TestCase.SERVICE_ACCOUNT_CREDS:
+      _service_account_creds(stub, args)
     else:
       raise NotImplementedError('Test case "%s" not implemented!' % self.name)
diff --git a/src/python/interop/setup.py b/src/python/interop/setup.py
index 7a329924a558499251e163f9fda66a7255230e39..502fcbedd84293dd253832ce87534648395a08e1 100644
--- a/src/python/interop/setup.py
+++ b/src/python/interop/setup.py
@@ -45,7 +45,7 @@ _PACKAGE_DATA = {
         'credentials/server1.pem',]
 }
 
-_INSTALL_REQUIRES = ['grpcio>=0.4.0a4']
+_INSTALL_REQUIRES = ['oauth2client>=1.4.7', 'grpcio>=0.4.0a4']
 
 setuptools.setup(
     name='interop',
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 848ee87bbc0e94125cf909a6e2e14d9598064069..776ee7a49b9c358f68313df5b644ad8bb2ec77a3 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -35,17 +35,11 @@
 
   proto_re = re.compile('(.*)\\.proto')
 
-  def excluded(filename, exclude_res):
-    for r in exclude_res:
-      if r.match(filename):
-        return True
-    return False
-
   def proto_to_cc(filename):
     m = proto_re.match(filename)
     if not m:
       return filename
-    return '$(GENDIR)/' + m.group(1) + '.pb.cc'
+    return '$(GENDIR)/' + m.group(1) + '.pb.cc $(GENDIR)/' + m.group(1) + '.grpc.pb.cc'
 %>
 
 
@@ -840,11 +834,17 @@ endif
 % for p in protos:
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/${p}.pb.cc: protoc_dep_error
+$(GENDIR)/${p}.grpc.pb.cc: protoc_dep_error
 else
 $(GENDIR)/${p}.pb.cc: ${p}.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/${p}.grpc.pb.cc: ${p}.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 % endfor
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.c
index e15fa7fcd91860a8a4ca24b6fff5815dc1ac00ec..592dfd415f9844469858ed344d88fbfa62590aa8 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.c
@@ -51,10 +51,11 @@ static void *tag(gpr_intptr t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             const char *test_name,
+                                            cancellation_mode mode,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "%s/%s/%s", test_name, config.name, mode.name);
   f = config.create_fixture(client_args, server_args);
   config.init_client(&f, client_args);
   config.init_server(&f, server_args);
@@ -109,7 +110,8 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   grpc_op ops[6];
   grpc_op *op;
   grpc_call *c;
-  grpc_end2end_test_fixture f = begin_test(config, __FUNCTION__, NULL, NULL);
+  grpc_end2end_test_fixture f =
+      begin_test(config, __FUNCTION__, mode, NULL, NULL);
   gpr_timespec deadline = five_seconds_time();
   cq_verifier *v_client = cq_verifier_create(f.client_cq);
   grpc_metadata_array initial_metadata_recv;
diff --git a/test/core/end2end/tests/cancel_test_helpers.h b/test/core/end2end/tests/cancel_test_helpers.h
index f2581dc32ffa6bcc4c7aa3df4335565cbe755617..0d680fcfe1191cd91cf87f41a425e5c1700a58f6 100644
--- a/test/core/end2end/tests/cancel_test_helpers.h
+++ b/test/core/end2end/tests/cancel_test_helpers.h
@@ -35,6 +35,7 @@
 #define GRPC_TEST_CORE_END2END_TESTS_CANCEL_TEST_HELPERS_H
 
 typedef struct {
+  const char *name;
   grpc_call_error (*initiate_cancel)(grpc_call *call);
   grpc_status_code expect_status;
   const char *expect_details;
@@ -45,7 +46,9 @@ static grpc_call_error wait_for_deadline(grpc_call *call) {
 }
 
 static const cancellation_mode cancellation_modes[] = {
-    {grpc_call_cancel, GRPC_STATUS_CANCELLED, ""},
-    {wait_for_deadline, GRPC_STATUS_DEADLINE_EXCEEDED, "Deadline Exceeded"}, };
+    {"cancel", grpc_call_cancel, GRPC_STATUS_CANCELLED, ""},
+    {"deadline", wait_for_deadline, GRPC_STATUS_DEADLINE_EXCEEDED,
+     "Deadline Exceeded"},
+};
 
-#endif  /* GRPC_TEST_CORE_END2END_TESTS_CANCEL_TEST_HELPERS_H */
+#endif /* GRPC_TEST_CORE_END2END_TESTS_CANCEL_TEST_HELPERS_H */
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index 2689c3f38e5ba94a32b1ba15007fe6c954460602..6b80ee1ee8cc8294798e24a9df5ec65a3e046c24 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -60,14 +60,14 @@ static void on_connect(void *arg, grpc_endpoint *tcp) {
 
 static void test_no_op(void) {
   grpc_tcp_server *s = grpc_tcp_server_create();
-  grpc_tcp_server_destroy(s);
+  grpc_tcp_server_destroy(s, NULL, NULL);
 }
 
 static void test_no_op_with_start(void) {
   grpc_tcp_server *s = grpc_tcp_server_create();
   LOG_TEST();
   grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
-  grpc_tcp_server_destroy(s);
+  grpc_tcp_server_destroy(s, NULL, NULL);
 }
 
 static void test_no_op_with_port(void) {
@@ -80,7 +80,7 @@ static void test_no_op_with_port(void) {
   GPR_ASSERT(
       grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr)));
 
-  grpc_tcp_server_destroy(s);
+  grpc_tcp_server_destroy(s, NULL, NULL);
 }
 
 static void test_no_op_with_port_and_start(void) {
@@ -95,7 +95,7 @@ static void test_no_op_with_port_and_start(void) {
 
   grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
 
-  grpc_tcp_server_destroy(s);
+  grpc_tcp_server_destroy(s, NULL, NULL);
 }
 
 static void test_connect(int n) {
@@ -144,7 +144,7 @@ static void test_connect(int n) {
 
   gpr_mu_unlock(&mu);
 
-  grpc_tcp_server_destroy(s);
+  grpc_tcp_server_destroy(s, NULL, NULL);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 9938fcf12eb700fbb7e6f902e6426cdf115437e5..dd294d95163694ee35531f66bdf8ade0b4be19b5 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -35,8 +35,8 @@
 #include <memory>
 
 #include "test/core/util/test_config.h"
-#include "test/cpp/util/echo_duplicate.pb.h"
-#include "test/cpp/util/echo.pb.h"
+#include "test/cpp/util/echo_duplicate.grpc.pb.h"
+#include "test/cpp/util/echo.grpc.pb.h"
 #include "src/cpp/util/time.h"
 #include <grpc++/async_unary_call.h>
 #include <grpc++/channel_arguments.h>
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 0d5db046df484b2d83e871711a2497741d03bc81..f96051cafac98c1984d302668202277a6fe4d143 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -35,8 +35,8 @@
 #include <thread>
 
 #include "test/core/util/test_config.h"
-#include "test/cpp/util/echo_duplicate.pb.h"
-#include "test/cpp/util/echo.pb.h"
+#include "test/cpp/util/echo_duplicate.grpc.pb.h"
+#include "test/cpp/util/echo.grpc.pb.h"
 #include "src/cpp/util/time.h"
 #include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index 9cdd8c94d1299d0a626e3a8ec7cd5a30239ce82d..eb6f5369a922c20055778e1f64f275c3fb368d54 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -38,7 +38,7 @@
 #include "src/cpp/util/time.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
-#include "test/cpp/util/echo.pb.h"
+#include "test/cpp/util/echo.grpc.pb.h"
 #include <grpc++/async_generic_service.h>
 #include <grpc++/async_unary_call.h>
 #include <grpc++/byte_buffer.h>
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index de6c6b7b77e6289ce5ed813ac4d72fd2f13a6dac..7c5e1aa715aa1e7a040550b7bf60ac4a0d4e1126 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -51,9 +51,9 @@
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
 #include "test/cpp/util/create_test_channel.h"
-#include "test/cpp/interop/test.pb.h"
-#include "test/cpp/interop/empty.pb.h"
-#include "test/cpp/interop/messages.pb.h"
+#include "test/cpp/interop/test.grpc.pb.h"
+#include "test/cpp/interop/empty.grpc.pb.h"
+#include "test/cpp/interop/messages.grpc.pb.h"
 
 DEFINE_bool(enable_ssl, false, "Whether to use ssl/tls.");
 DEFINE_bool(use_prod_roots, false, "True to use SSL roots for google");
diff --git a/test/cpp/interop/server.cc b/test/cpp/interop/server.cc
index 780a7370acbf8b8583fda7ee655587c92ef250d8..87bf48938bc87c0cc2ad5a54ed19978a2866de62 100644
--- a/test/cpp/interop/server.cc
+++ b/test/cpp/interop/server.cc
@@ -49,9 +49,9 @@
 #include <grpc++/server_credentials.h>
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
-#include "test/cpp/interop/test.pb.h"
-#include "test/cpp/interop/empty.pb.h"
-#include "test/cpp/interop/messages.pb.h"
+#include "test/cpp/interop/test.grpc.pb.h"
+#include "test/cpp/interop/empty.grpc.pb.h"
+#include "test/cpp/interop/messages.grpc.pb.h"
 
 DEFINE_bool(enable_ssl, false, "Whether to use ssl/tls.");
 DEFINE_int32(port, 0, "Server port.");
diff --git a/test/cpp/qps/client.h b/test/cpp/qps/client.h
index 6e7f63e444442a6c47f19e00db250181dedfc0b5..2dc5b3860f3852cff54750388546f7d8377e4bdb 100644
--- a/test/cpp/qps/client.h
+++ b/test/cpp/qps/client.h
@@ -36,7 +36,7 @@
 
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/timer.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 
 #include <condition_variable>
 #include <mutex>
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 3ab06bd7c723bea459da896f9d71c3b107804d47..0a6d9beeca6ca156020814b7e27f5066c0232603 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -48,7 +48,7 @@
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
 #include "test/cpp/util/create_test_channel.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/timer.h"
 #include "test/cpp/qps/client.h"
 
diff --git a/test/cpp/qps/client_sync.cc b/test/cpp/qps/client_sync.cc
index 0c8b4f090f4dcd21ef6b3eaf7020de98ba1354e4..aea5a0fb27acd1cf75e0e10aff1ca47362df1199 100644
--- a/test/cpp/qps/client_sync.cc
+++ b/test/cpp/qps/client_sync.cc
@@ -55,7 +55,7 @@
 #include <gtest/gtest.h>
 #include "test/cpp/util/create_test_channel.h"
 #include "test/cpp/qps/client.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/timer.h"
 
diff --git a/test/cpp/qps/driver.h b/test/cpp/qps/driver.h
index 7a81b701c48737c7c2cbfbc858a36c86b0cc898d..b3a8bf8cc4a695f4ab7070d8844ae24471668b93 100644
--- a/test/cpp/qps/driver.h
+++ b/test/cpp/qps/driver.h
@@ -35,7 +35,7 @@
 #define TEST_QPS_DRIVER_H
 
 #include "test/cpp/qps/histogram.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
diff --git a/test/cpp/qps/histogram.h b/test/cpp/qps/histogram.h
index fbb80abf87dce9c44fb6511bd2c3e4887dde9dd1..0547b7283a7203edf569993ba473c498e5b36245 100644
--- a/test/cpp/qps/histogram.h
+++ b/test/cpp/qps/histogram.h
@@ -35,7 +35,7 @@
 #define TEST_QPS_HISTOGRAM_H
 
 #include <grpc/support/histogram.h>
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
diff --git a/test/cpp/qps/server.h b/test/cpp/qps/server.h
index ef71cb94d00a379e47ec1c9233105a24ad80b69d..68e01154101be95c3378f44568b150d9b5cbfafd 100644
--- a/test/cpp/qps/server.h
+++ b/test/cpp/qps/server.h
@@ -35,7 +35,7 @@
 #define TEST_QPS_SERVER_H
 
 #include "test/cpp/qps/timer.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index 9a176638e8ea4f75ee3f7c3fe9f8b04e2b98c722..b19c443c82333647f0602e70231821c5ffd1c819 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.cc
@@ -52,7 +52,7 @@
 #include <grpc++/stream.h>
 #include <gtest/gtest.h>
 #include "src/cpp/server/thread_pool.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/server.h"
 
 #include <grpc/grpc.h>
diff --git a/test/cpp/qps/server_sync.cc b/test/cpp/qps/server_sync.cc
index 996442990106b89c277c2d744d34d0c4de0e1644..2770233a7c09373688d6ae78f0f595d082aa0493 100644
--- a/test/cpp/qps/server_sync.cc
+++ b/test/cpp/qps/server_sync.cc
@@ -47,7 +47,7 @@
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
 #include "src/cpp/server/thread_pool.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/server.h"
 #include "test/cpp/qps/timer.h"
 
diff --git a/test/cpp/qps/worker.cc b/test/cpp/qps/worker.cc
index b6830cc055709b5d8255d69e86e2cd1787ce615b..101eb9f9694bc22e5e52cd4af4e161589c2b1ad6 100644
--- a/test/cpp/qps/worker.cc
+++ b/test/cpp/qps/worker.cc
@@ -55,7 +55,7 @@
 #include <grpc++/stream.h>
 #include "test/core/util/grpc_profiler.h"
 #include "test/cpp/util/create_test_channel.h"
-#include "test/cpp/qps/qpstest.pb.h"
+#include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/client.h"
 #include "test/cpp/qps/server.h"
 
diff --git a/test/cpp/util/cli_call_test.cc b/test/cpp/util/cli_call_test.cc
index 91fc40c31f05eb669d892a84c8bc2246538d64b9..32ef392cc4c0368b97562d64fb65d6d82a056c27 100644
--- a/test/cpp/util/cli_call_test.cc
+++ b/test/cpp/util/cli_call_test.cc
@@ -33,7 +33,7 @@
 
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/cli_call.h"
-#include "test/cpp/util/echo.pb.h"
+#include "test/cpp/util/echo.grpc.pb.h"
 #include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
diff --git a/tools/distpackages/build_deb_packages.sh b/tools/distpackages/build_deb_packages.sh
index 366a5184c8bf2f917fa6d7bce1543ab00175e15b..0beb41ed0a5ae036302856f84f54d1d8516279fd 100755
--- a/tools/distpackages/build_deb_packages.sh
+++ b/tools/distpackages/build_deb_packages.sh
@@ -45,7 +45,13 @@ if [ -f /version.txt ]; then
   pkg_version=$(cat /version.txt)
 fi
 version="${pkg_version}.0"
-echo "Target release => $pkg_version"
+release_tag="release-${pkg_version//./_}"
+echo "Target release => $pkg_version, will checkout tag $release_tag"
+
+# Switch grpc_root to the release tag
+pushd $grpc_root
+git checkout $release_tag || { echo "bad release tag ${release_tag}"; exit 1; }
+popd
 
 if [ -f /.dockerinit ]; then
   # We're in Docker where uname -p returns "unknown".
diff --git a/tools/gce_setup/grpc_docker.sh b/tools/gce_setup/grpc_docker.sh
index dc480983ff4854a139d2771bccd929762dd986fd..40634291cf9b5467fa6825262ac511b4cd37fe77 100755
--- a/tools/gce_setup/grpc_docker.sh
+++ b/tools/gce_setup/grpc_docker.sh
@@ -1041,6 +1041,35 @@ grpc_interop_gen_python_cmd() {
   echo $the_cmd
 }
 
+# constructs the full dockerized python service_account auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_service_account_creds_gen_python_cmd() {
+  local cmd_prefix="sudo docker run grpc/ruby bin/bash -l -c";
+  local gfe_flags=$(_grpc_prod_gfe_flags)
+  local added_gfe_flags=$(_grpc_default_creds_test_flags)
+  local env_prefix="SSL_CERT_FILE=/cacerts/roots.pem"
+  env_prefix+=" GOOGLE_APPLICATION_CREDENTIALS=/service_account/stubbyCloudTestingTest-7dd63462c60c.json"
+  local the_cmd="$cmd_prefix '$env_prefix python -B -m interop.client --use_tls $gfe_flags $added_gfe_flags $@'"
+  echo $the_cmd
+}
+
+# constructs the full dockerized python gce auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_compute_engine_creds_gen_python_cmd() {
+  local cmd_prefix="sudo docker run grpc/ruby bin/bash -l -c";
+  local gfe_flags=$(_grpc_prod_gfe_flags)
+  local added_gfe_flags=$(_grpc_gce_test_flags)
+  local env_prefix="SSL_CERT_FILE=/cacerts/roots.pem"
+  local the_cmd="$cmd_prefix '$env_prefix python -B -m interop.client --use_tls $gfe_flags $added_gfe_flags $@'"
+  echo $the_cmd
+}
+
 # constructs the full dockerized java interop test cmd.
 #
 # call-seq: