/* * * 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 #include #include #include #include #include #include "src/core/ext/load_reporting/load_reporting.h" #include "src/core/ext/load_reporting/load_reporting_filter.h" #include "src/core/lib/channel/channel_args.h" #include "src/core/lib/profiling/timers.h" #include "src/core/lib/slice/slice_internal.h" #include "src/core/lib/transport/static_metadata.h" typedef struct call_data { intptr_t id; /**< an id unique to the call */ bool have_initial_md_string; grpc_slice initial_md_string; bool have_service_method; grpc_slice service_method; /* stores the recv_initial_metadata op's ready closure, which we wrap with our * own (on_initial_md_ready) in order to capture the incoming initial metadata * */ grpc_closure *ops_recv_initial_metadata_ready; /* to get notified of the availability of the incoming initial metadata. */ grpc_closure on_initial_md_ready; grpc_metadata_batch *recv_initial_metadata; } call_data; typedef struct channel_data { intptr_t id; /**< an id unique to the channel */ } channel_data; static void on_initial_md_ready(grpc_exec_ctx *exec_ctx, void *user_data, grpc_error *err) { grpc_call_element *elem = user_data; call_data *calld = elem->call_data; if (err == GRPC_ERROR_NONE) { if (calld->recv_initial_metadata->idx.named.path != NULL) { calld->service_method = grpc_slice_ref_internal( GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.path->md)); calld->have_service_method = true; } else { err = grpc_error_add_child(err, GRPC_ERROR_CREATE("Missing :path header")); } if (calld->recv_initial_metadata->idx.named.lb_token != NULL) { calld->initial_md_string = grpc_slice_ref_internal( GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.lb_token->md)); calld->have_initial_md_string = true; grpc_metadata_batch_remove( exec_ctx, calld->recv_initial_metadata, calld->recv_initial_metadata->idx.named.lb_token); } } else { GRPC_ERROR_REF(err); } calld->ops_recv_initial_metadata_ready->cb( exec_ctx, calld->ops_recv_initial_metadata_ready->cb_arg, err); GRPC_ERROR_UNREF(err); } /* Constructor for call_data */ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, const grpc_call_element_args *args) { call_data *calld = elem->call_data; calld->id = (intptr_t)args->call_stack; grpc_closure_init(&calld->on_initial_md_ready, on_initial_md_ready, elem, grpc_schedule_on_exec_ctx); /* TODO(dgq): do something with the data channel_data *chand = elem->channel_data; grpc_load_reporting_call_data lr_call_data = {GRPC_LR_POINT_CALL_CREATION, (intptr_t)chand->id, (intptr_t)calld->id, NULL, NULL, NULL, NULL}; */ return GRPC_ERROR_NONE; } /* Destructor for call_data */ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, const grpc_call_final_info *final_info, void *ignored) { call_data *calld = elem->call_data; /* TODO(dgq): do something with the data channel_data *chand = elem->channel_data; grpc_load_reporting_call_data lr_call_data = {GRPC_LR_POINT_CALL_DESTRUCTION, (intptr_t)chand->id, (intptr_t)calld->id, final_info, calld->initial_md_string, calld->trailing_md_string, calld->service_method}; */ if (calld->have_initial_md_string) { grpc_slice_unref_internal(exec_ctx, calld->initial_md_string); } if (calld->have_service_method) { grpc_slice_unref_internal(exec_ctx, calld->service_method); } } /* Constructor for channel_data */ static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_channel_element_args *args) { GPR_ASSERT(!args->is_last); channel_data *chand = elem->channel_data; chand->id = (intptr_t)args->channel_stack; /* TODO(dgq): do something with the data grpc_load_reporting_call_data lr_call_data = {GRPC_LR_POINT_CHANNEL_CREATION, (intptr_t)chand, 0, NULL, NULL, NULL, NULL}; */ return GRPC_ERROR_NONE; } /* Destructor for channel data */ static void destroy_channel_elem(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem) { /* TODO(dgq): do something with the data channel_data *chand = elem->channel_data; grpc_load_reporting_call_data lr_call_data = { GRPC_LR_POINT_CHANNEL_DESTRUCTION, (intptr_t)chand->id, 0, NULL, NULL, NULL, NULL}; */ } static void lr_start_transport_stream_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op *op) { GPR_TIMER_BEGIN("lr_start_transport_stream_op", 0); call_data *calld = elem->call_data; if (op->recv_initial_metadata) { calld->recv_initial_metadata = op->recv_initial_metadata; /* substitute our callback for the higher callback */ calld->ops_recv_initial_metadata_ready = op->recv_initial_metadata_ready; op->recv_initial_metadata_ready = &calld->on_initial_md_ready; } grpc_call_next_op(exec_ctx, elem, op); GPR_TIMER_END("lr_start_transport_stream_op", 0); } const grpc_channel_filter grpc_load_reporting_filter = { lr_start_transport_stream_op, grpc_channel_next_op, sizeof(call_data), init_call_elem, grpc_call_stack_ignore_set_pollset_or_pollset_set, destroy_call_elem, sizeof(channel_data), init_channel_elem, destroy_channel_elem, grpc_call_next_get_peer, grpc_channel_next_get_info, "load_reporting"};