| /* |
| * |
| * 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/channel/census_filter.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "src/core/channel/channel_stack.h" |
| #include "src/core/channel/noop_filter.h" |
| #include "src/core/statistics/census_interface.h" |
| #include "src/core/statistics/census_rpc_stats.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/slice.h> |
| #include <grpc/support/time.h> |
| |
| typedef struct call_data { |
| census_op_id op_id; |
| census_rpc_stats stats; |
| gpr_timespec start_ts; |
| |
| /* recv callback */ |
| grpc_stream_op_buffer *recv_ops; |
| void (*on_done_recv)(void *user_data, int success); |
| void *recv_user_data; |
| } call_data; |
| |
| typedef struct channel_data { |
| grpc_mdstr* path_str; /* pointer to meta data str with key == ":path" */ |
| } channel_data; |
| |
| static void init_rpc_stats(census_rpc_stats* stats) { |
| memset(stats, 0, sizeof(census_rpc_stats)); |
| stats->cnt = 1; |
| } |
| |
| static void extract_and_annotate_method_tag(grpc_stream_op_buffer* sopb, call_data* calld, |
| channel_data* chand) { |
| grpc_linked_mdelem* m; |
| size_t i; |
| for (i = 0; i < sopb->nops; i++) { |
| grpc_stream_op * op = &sopb->ops[i]; |
| if (op->type != GRPC_OP_METADATA) continue; |
| for (m = op->data.metadata.list.head; m != NULL; m = m->next) { |
| if (m->md->key == chand->path_str) { |
| gpr_log(GPR_DEBUG, "%s", (const char*)GPR_SLICE_START_PTR(m->md->value->slice)); |
| census_add_method_tag( |
| calld->op_id, (const char*)GPR_SLICE_START_PTR(m->md->value->slice)); |
| } |
| } |
| } |
| } |
| |
| static void client_mutate_op(grpc_call_element *elem, grpc_transport_op *op) { |
| call_data* calld = elem->call_data; |
| channel_data* chand = elem->channel_data; |
| if (op->send_ops) { |
| extract_and_annotate_method_tag(op->send_ops, calld, chand); |
| } |
| } |
| |
| static void client_start_transport_op(grpc_call_element* elem, grpc_transport_op* op) { |
| call_data* calld = elem->call_data; |
| GPR_ASSERT((calld->op_id.upper != 0) || (calld->op_id.lower != 0)); |
| client_mutate_op(elem, op); |
| grpc_call_next_op(elem, op); |
| } |
| |
| static void server_on_done_recv(void *ptr, int 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_ops, calld, chand); |
| } |
| calld->on_done_recv(calld->recv_user_data, success); |
| } |
| |
| static void server_mutate_op(grpc_call_element *elem, grpc_transport_op *op) { |
| call_data* calld = elem->call_data; |
| if (op->recv_ops) { |
| /* substitute our callback for the op callback */ |
| calld->recv_ops = op->recv_ops; |
| calld->on_done_recv = op->on_done_recv; |
| calld->recv_user_data = op->recv_user_data; |
| op->on_done_recv = server_on_done_recv; |
| op->recv_user_data = elem; |
| } |
| } |
| |
| static void server_start_transport_op(grpc_call_element* elem, grpc_transport_op* op) { |
| 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(elem, op); |
| } |
| |
| static void channel_op(grpc_channel_element* elem, |
| grpc_channel_element* from_elem, grpc_channel_op* op) { |
| switch (op->type) { |
| case GRPC_TRANSPORT_CLOSED: |
| /* TODO(hongyu): Annotate trace information for all calls of the channel |
| */ |
| break; |
| default: |
| break; |
| } |
| grpc_channel_next_op(elem, op); |
| } |
| |
| static void client_init_call_elem(grpc_call_element* elem, |
| const void* server_transport_data, grpc_transport_op *initial_op) { |
| call_data* d = elem->call_data; |
| GPR_ASSERT(d != NULL); |
| init_rpc_stats(&d->stats); |
| d->start_ts = gpr_now(); |
| d->op_id = census_tracing_start_op(); |
| if (initial_op) client_mutate_op(elem, initial_op); |
| } |
| |
| static void client_destroy_call_elem(grpc_call_element* elem) { |
| call_data* d = elem->call_data; |
| GPR_ASSERT(d != NULL); |
| census_record_rpc_client_stats(d->op_id, &d->stats); |
| census_tracing_end_op(d->op_id); |
| } |
| |
| static void server_init_call_elem(grpc_call_element* elem, |
| const void* server_transport_data, grpc_transport_op *initial_op) { |
| call_data* d = elem->call_data; |
| GPR_ASSERT(d != NULL); |
| init_rpc_stats(&d->stats); |
| d->start_ts = gpr_now(); |
| d->op_id = census_tracing_start_op(); |
| if (initial_op) server_mutate_op(elem, initial_op); |
| } |
| |
| static void server_destroy_call_elem(grpc_call_element* elem) { |
| call_data* d = elem->call_data; |
| GPR_ASSERT(d != NULL); |
| d->stats.elapsed_time_ms = |
| gpr_timespec_to_micros(gpr_time_sub(gpr_now(), d->start_ts)); |
| census_record_rpc_server_stats(d->op_id, &d->stats); |
| census_tracing_end_op(d->op_id); |
| } |
| |
| static void init_channel_elem(grpc_channel_element* elem, |
| const grpc_channel_args* args, grpc_mdctx* mdctx, |
| int is_first, int is_last) { |
| channel_data* chand = elem->channel_data; |
| GPR_ASSERT(chand != NULL); |
| GPR_ASSERT(!is_first); |
| GPR_ASSERT(!is_last); |
| chand->path_str = grpc_mdstr_from_string(mdctx, ":path"); |
| } |
| |
| static void destroy_channel_elem(grpc_channel_element* elem) { |
| channel_data* chand = elem->channel_data; |
| GPR_ASSERT(chand != NULL); |
| if (chand->path_str != NULL) { |
| grpc_mdstr_unref(chand->path_str); |
| } |
| } |
| |
| const grpc_channel_filter grpc_client_census_filter = { |
| client_start_transport_op, channel_op, sizeof(call_data), client_init_call_elem, |
| client_destroy_call_elem, sizeof(channel_data), init_channel_elem, |
| destroy_channel_elem, "census-client"}; |
| |
| const grpc_channel_filter grpc_server_census_filter = { |
| server_start_transport_op, channel_op, sizeof(call_data), server_init_call_elem, |
| server_destroy_call_elem, sizeof(channel_data), init_channel_elem, |
| destroy_channel_elem, "census-server"}; |