/* * * Copyright 2015, Google Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "src/core/lib/census/grpc_filter.h" #include #include #include #include #include #include #include #include "src/core/lib/channel/channel_stack.h" #include "src/core/lib/statistics/census_interface.h" #include "src/core/lib/statistics/census_rpc_stats.h" #include "src/core/lib/transport/static_metadata.h" typedef struct call_data { census_op_id op_id; census_context *ctxt; gpr_timespec start_ts; int error; /* recv callback */ grpc_metadata_batch *recv_initial_metadata; grpc_closure *on_done_recv; grpc_closure finish_recv; } call_data; typedef struct channel_data { uint8_t unused; } channel_data; static void extract_and_annotate_method_tag(grpc_metadata_batch *md, call_data *calld, channel_data *chand) { grpc_linked_mdelem *m; for (m = md->list.head; m != NULL; m = m->next) { if (m->md->key == GRPC_MDSTR_PATH) { gpr_log(GPR_DEBUG, "%s", (const char *)GPR_SLICE_START_PTR(m->md->value->slice)); /* Add method tag here */ } } } static void client_mutate_op(grpc_call_element *elem, grpc_transport_stream_op *op) { call_data *calld = elem->call_data; channel_data *chand = elem->channel_data; if (op->send_initial_metadata) { extract_and_annotate_method_tag(op->send_initial_metadata, calld, chand); } } static void client_start_transport_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op *op) { client_mutate_op(elem, op); grpc_call_next_op(exec_ctx, elem, op); } static void server_on_done_recv(grpc_exec_ctx *exec_ctx, void *ptr, bool success) { grpc_call_element *elem = ptr; call_data *calld = elem->call_data; channel_data *chand = elem->channel_data; if (success) { extract_and_annotate_method_tag(calld->recv_initial_metadata, calld, chand); } calld->on_done_recv->cb(exec_ctx, calld->on_done_recv->cb_arg, success); } static void server_mutate_op(grpc_call_element *elem, grpc_transport_stream_op *op) { call_data *calld = elem->call_data; if (op->recv_initial_metadata) { /* substitute our callback for the op callback */ calld->recv_initial_metadata = op->recv_initial_metadata; calld->on_done_recv = op->recv_initial_metadata_ready; op->recv_initial_metadata_ready = &calld->finish_recv; } } static void server_start_transport_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op *op) { /* TODO(ctiller): this code fails. I don't know why. I expect it's incomplete, and someone should look at it soon. call_data *calld = elem->call_data; GPR_ASSERT((calld->op_id.upper != 0) || (calld->op_id.lower != 0)); */ server_mutate_op(elem, op); grpc_call_next_op(exec_ctx, elem, op); } static void client_init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_call_element_args *args) { call_data *d = elem->call_data; GPR_ASSERT(d != NULL); memset(d, 0, sizeof(*d)); d->start_ts = gpr_now(GPR_CLOCK_REALTIME); } static void client_destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) { call_data *d = elem->call_data; GPR_ASSERT(d != NULL); /* TODO(hongyu): record rpc client stats and census_rpc_end_op here */ } static void server_init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_call_element_args *args) { call_data *d = elem->call_data; GPR_ASSERT(d != NULL); memset(d, 0, sizeof(*d)); d->start_ts = gpr_now(GPR_CLOCK_REALTIME); /* TODO(hongyu): call census_tracing_start_op here. */ grpc_closure_init(&d->finish_recv, server_on_done_recv, elem); } static void server_destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) { call_data *d = elem->call_data; GPR_ASSERT(d != NULL); /* TODO(hongyu): record rpc server stats and census_tracing_end_op here */ } static void init_channel_elem(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_channel_element_args *args) { channel_data *chand = elem->channel_data; GPR_ASSERT(chand != NULL); } static void destroy_channel_elem(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem) { channel_data *chand = elem->channel_data; GPR_ASSERT(chand != NULL); } const grpc_channel_filter grpc_client_census_filter = { client_start_transport_op, grpc_channel_next_op, sizeof(call_data), client_init_call_elem, grpc_call_stack_ignore_set_pollset, client_destroy_call_elem, sizeof(channel_data), init_channel_elem, destroy_channel_elem, grpc_call_next_get_peer, "census-client"}; const grpc_channel_filter grpc_server_census_filter = { server_start_transport_op, grpc_channel_next_op, sizeof(call_data), server_init_call_elem, grpc_call_stack_ignore_set_pollset, server_destroy_call_elem, sizeof(channel_data), init_channel_elem, destroy_channel_elem, grpc_call_next_get_peer, "census-server"};