| /* |
| * |
| * Copyright 2015-2016 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "src/core/lib/surface/server.h" |
| |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/useful.h> |
| |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/channel/connected_channel.h" |
| #include "src/core/lib/debug/stats.h" |
| #include "src/core/lib/iomgr/executor.h" |
| #include "src/core/lib/iomgr/iomgr.h" |
| #include "src/core/lib/slice/slice_internal.h" |
| #include "src/core/lib/support/mpscq.h" |
| #include "src/core/lib/support/spinlock.h" |
| #include "src/core/lib/support/string.h" |
| #include "src/core/lib/surface/api_trace.h" |
| #include "src/core/lib/surface/call.h" |
| #include "src/core/lib/surface/channel.h" |
| #include "src/core/lib/surface/completion_queue.h" |
| #include "src/core/lib/surface/init.h" |
| #include "src/core/lib/transport/metadata.h" |
| #include "src/core/lib/transport/static_metadata.h" |
| |
| typedef struct listener { |
| void* arg; |
| void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg, |
| grpc_pollset** pollsets, size_t pollset_count); |
| void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg, |
| grpc_closure* closure); |
| struct listener* next; |
| grpc_closure destroy_done; |
| } listener; |
| |
| typedef struct call_data call_data; |
| typedef struct channel_data channel_data; |
| typedef struct registered_method registered_method; |
| |
| typedef enum { BATCH_CALL, REGISTERED_CALL } requested_call_type; |
| |
| grpc_core::TraceFlag grpc_server_channel_trace(false, "server_channel"); |
| |
| typedef struct requested_call { |
| gpr_mpscq_node request_link; /* must be first */ |
| requested_call_type type; |
| size_t cq_idx; |
| void* tag; |
| grpc_server* server; |
| grpc_completion_queue* cq_bound_to_call; |
| grpc_call** call; |
| grpc_cq_completion completion; |
| grpc_metadata_array* initial_metadata; |
| union { |
| struct { |
| grpc_call_details* details; |
| } batch; |
| struct { |
| registered_method* method; |
| gpr_timespec* deadline; |
| grpc_byte_buffer** optional_payload; |
| } registered; |
| } data; |
| } requested_call; |
| |
| typedef struct channel_registered_method { |
| registered_method* server_registered_method; |
| uint32_t flags; |
| bool has_host; |
| grpc_slice method; |
| grpc_slice host; |
| } channel_registered_method; |
| |
| struct channel_data { |
| grpc_server* server; |
| grpc_connectivity_state connectivity_state; |
| grpc_channel* channel; |
| size_t cq_idx; |
| /* linked list of all channels on a server */ |
| channel_data* next; |
| channel_data* prev; |
| channel_registered_method* registered_methods; |
| uint32_t registered_method_slots; |
| uint32_t registered_method_max_probes; |
| grpc_closure finish_destroy_channel_closure; |
| grpc_closure channel_connectivity_changed; |
| }; |
| |
| typedef struct shutdown_tag { |
| void* tag; |
| grpc_completion_queue* cq; |
| grpc_cq_completion completion; |
| } shutdown_tag; |
| |
| typedef enum { |
| /* waiting for metadata */ |
| NOT_STARTED, |
| /* inital metadata read, not flow controlled in yet */ |
| PENDING, |
| /* flow controlled in, on completion queue */ |
| ACTIVATED, |
| /* cancelled before being queued */ |
| ZOMBIED |
| } call_state; |
| |
| typedef struct request_matcher request_matcher; |
| |
| struct call_data { |
| grpc_call* call; |
| |
| gpr_atm state; |
| |
| bool path_set; |
| bool host_set; |
| grpc_slice path; |
| grpc_slice host; |
| grpc_millis deadline; |
| |
| grpc_completion_queue* cq_new; |
| |
| grpc_metadata_batch* recv_initial_metadata; |
| uint32_t recv_initial_metadata_flags; |
| grpc_metadata_array initial_metadata; |
| |
| request_matcher* matcher; |
| grpc_byte_buffer* payload; |
| |
| grpc_closure got_initial_metadata; |
| grpc_closure server_on_recv_initial_metadata; |
| grpc_closure kill_zombie_closure; |
| grpc_closure* on_done_recv_initial_metadata; |
| |
| grpc_closure publish; |
| |
| call_data* pending_next; |
| }; |
| |
| struct request_matcher { |
| grpc_server* server; |
| call_data* pending_head; |
| call_data* pending_tail; |
| gpr_locked_mpscq* requests_per_cq; |
| }; |
| |
| struct registered_method { |
| char* method; |
| char* host; |
| grpc_server_register_method_payload_handling payload_handling; |
| uint32_t flags; |
| /* one request matcher per method */ |
| request_matcher matcher; |
| registered_method* next; |
| }; |
| |
| typedef struct { |
| grpc_channel** channels; |
| size_t num_channels; |
| } channel_broadcaster; |
| |
| struct grpc_server { |
| grpc_channel_args* channel_args; |
| |
| grpc_completion_queue** cqs; |
| grpc_pollset** pollsets; |
| size_t cq_count; |
| size_t pollset_count; |
| bool started; |
| |
| /* The two following mutexes control access to server-state |
| mu_global controls access to non-call-related state (e.g., channel state) |
| mu_call controls access to call-related state (e.g., the call lists) |
| |
| If they are ever required to be nested, you must lock mu_global |
| before mu_call. This is currently used in shutdown processing |
| (grpc_server_shutdown_and_notify and maybe_finish_shutdown) */ |
| gpr_mu mu_global; /* mutex for server and channel state */ |
| gpr_mu mu_call; /* mutex for call-specific state */ |
| |
| /* startup synchronization: flag is protected by mu_global, signals whether |
| we are doing the listener start routine or not */ |
| bool starting; |
| gpr_cv starting_cv; |
| |
| registered_method* registered_methods; |
| /** one request matcher for unregistered methods */ |
| request_matcher unregistered_request_matcher; |
| |
| gpr_atm shutdown_flag; |
| uint8_t shutdown_published; |
| size_t num_shutdown_tags; |
| shutdown_tag* shutdown_tags; |
| |
| channel_data root_channel_data; |
| |
| listener* listeners; |
| int listeners_destroyed; |
| gpr_refcount internal_refcount; |
| |
| /** when did we print the last shutdown progress message */ |
| gpr_timespec last_shutdown_message_time; |
| }; |
| |
| #define SERVER_FROM_CALL_ELEM(elem) \ |
| (((channel_data*)(elem)->channel_data)->server) |
| |
| static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* calld, |
| grpc_error* error); |
| static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server, |
| size_t cq_idx, requested_call* rc, grpc_error* error); |
| /* Before calling maybe_finish_shutdown, we must hold mu_global and not |
| hold mu_call */ |
| static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_server* server); |
| |
| /* |
| * channel broadcaster |
| */ |
| |
| /* assumes server locked */ |
| static void channel_broadcaster_init(grpc_server* s, channel_broadcaster* cb) { |
| channel_data* c; |
| size_t count = 0; |
| for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) { |
| count++; |
| } |
| cb->num_channels = count; |
| cb->channels = |
| (grpc_channel**)gpr_malloc(sizeof(*cb->channels) * cb->num_channels); |
| count = 0; |
| for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) { |
| cb->channels[count++] = c->channel; |
| GRPC_CHANNEL_INTERNAL_REF(c->channel, "broadcast"); |
| } |
| } |
| |
| struct shutdown_cleanup_args { |
| grpc_closure closure; |
| grpc_slice slice; |
| }; |
| |
| static void shutdown_cleanup(grpc_exec_ctx* exec_ctx, void* arg, |
| grpc_error* error) { |
| struct shutdown_cleanup_args* a = (struct shutdown_cleanup_args*)arg; |
| grpc_slice_unref_internal(exec_ctx, a->slice); |
| gpr_free(a); |
| } |
| |
| static void send_shutdown(grpc_exec_ctx* exec_ctx, grpc_channel* channel, |
| bool send_goaway, grpc_error* send_disconnect) { |
| struct shutdown_cleanup_args* sc = |
| (struct shutdown_cleanup_args*)gpr_malloc(sizeof(*sc)); |
| GRPC_CLOSURE_INIT(&sc->closure, shutdown_cleanup, sc, |
| grpc_schedule_on_exec_ctx); |
| grpc_transport_op* op = grpc_make_transport_op(&sc->closure); |
| grpc_channel_element* elem; |
| |
| op->goaway_error = |
| send_goaway ? grpc_error_set_int( |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown"), |
| GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_OK) |
| : GRPC_ERROR_NONE; |
| op->set_accept_stream = true; |
| sc->slice = grpc_slice_from_copied_string("Server shutdown"); |
| op->disconnect_with_error = send_disconnect; |
| |
| elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0); |
| elem->filter->start_transport_op(exec_ctx, elem, op); |
| } |
| |
| static void channel_broadcaster_shutdown(grpc_exec_ctx* exec_ctx, |
| channel_broadcaster* cb, |
| bool send_goaway, |
| grpc_error* force_disconnect) { |
| size_t i; |
| |
| for (i = 0; i < cb->num_channels; i++) { |
| send_shutdown(exec_ctx, cb->channels[i], send_goaway, |
| GRPC_ERROR_REF(force_disconnect)); |
| GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, cb->channels[i], "broadcast"); |
| } |
| gpr_free(cb->channels); |
| GRPC_ERROR_UNREF(force_disconnect); |
| } |
| |
| /* |
| * request_matcher |
| */ |
| |
| static void request_matcher_init(request_matcher* rm, grpc_server* server) { |
| memset(rm, 0, sizeof(*rm)); |
| rm->server = server; |
| rm->requests_per_cq = (gpr_locked_mpscq*)gpr_malloc( |
| sizeof(*rm->requests_per_cq) * server->cq_count); |
| for (size_t i = 0; i < server->cq_count; i++) { |
| gpr_locked_mpscq_init(&rm->requests_per_cq[i]); |
| } |
| } |
| |
| static void request_matcher_destroy(request_matcher* rm) { |
| for (size_t i = 0; i < rm->server->cq_count; i++) { |
| GPR_ASSERT(gpr_locked_mpscq_pop(&rm->requests_per_cq[i]) == nullptr); |
| gpr_locked_mpscq_destroy(&rm->requests_per_cq[i]); |
| } |
| gpr_free(rm->requests_per_cq); |
| } |
| |
| static void kill_zombie(grpc_exec_ctx* exec_ctx, void* elem, |
| grpc_error* error) { |
| grpc_call_unref(grpc_call_from_top_element((grpc_call_element*)elem)); |
| } |
| |
| static void request_matcher_zombify_all_pending_calls(grpc_exec_ctx* exec_ctx, |
| request_matcher* rm) { |
| while (rm->pending_head) { |
| call_data* calld = rm->pending_head; |
| rm->pending_head = calld->pending_next; |
| gpr_atm_no_barrier_store(&calld->state, ZOMBIED); |
| GRPC_CLOSURE_INIT( |
| &calld->kill_zombie_closure, kill_zombie, |
| grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0), |
| grpc_schedule_on_exec_ctx); |
| GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE); |
| } |
| } |
| |
| static void request_matcher_kill_requests(grpc_exec_ctx* exec_ctx, |
| grpc_server* server, |
| request_matcher* rm, |
| grpc_error* error) { |
| requested_call* rc; |
| for (size_t i = 0; i < server->cq_count; i++) { |
| while ((rc = (requested_call*)gpr_locked_mpscq_pop( |
| &rm->requests_per_cq[i])) != nullptr) { |
| fail_call(exec_ctx, server, i, rc, GRPC_ERROR_REF(error)); |
| } |
| } |
| GRPC_ERROR_UNREF(error); |
| } |
| |
| /* |
| * server proper |
| */ |
| |
| static void server_ref(grpc_server* server) { |
| gpr_ref(&server->internal_refcount); |
| } |
| |
| static void server_delete(grpc_exec_ctx* exec_ctx, grpc_server* server) { |
| registered_method* rm; |
| size_t i; |
| grpc_channel_args_destroy(exec_ctx, server->channel_args); |
| gpr_mu_destroy(&server->mu_global); |
| gpr_mu_destroy(&server->mu_call); |
| gpr_cv_destroy(&server->starting_cv); |
| while ((rm = server->registered_methods) != nullptr) { |
| server->registered_methods = rm->next; |
| if (server->started) { |
| request_matcher_destroy(&rm->matcher); |
| } |
| gpr_free(rm->method); |
| gpr_free(rm->host); |
| gpr_free(rm); |
| } |
| if (server->started) { |
| request_matcher_destroy(&server->unregistered_request_matcher); |
| } |
| for (i = 0; i < server->cq_count; i++) { |
| GRPC_CQ_INTERNAL_UNREF(exec_ctx, server->cqs[i], "server"); |
| } |
| gpr_free(server->cqs); |
| gpr_free(server->pollsets); |
| gpr_free(server->shutdown_tags); |
| gpr_free(server); |
| } |
| |
| static void server_unref(grpc_exec_ctx* exec_ctx, grpc_server* server) { |
| if (gpr_unref(&server->internal_refcount)) { |
| server_delete(exec_ctx, server); |
| } |
| } |
| |
| static int is_channel_orphaned(channel_data* chand) { |
| return chand->next == chand; |
| } |
| |
| static void orphan_channel(channel_data* chand) { |
| chand->next->prev = chand->prev; |
| chand->prev->next = chand->next; |
| chand->next = chand->prev = chand; |
| } |
| |
| static void finish_destroy_channel(grpc_exec_ctx* exec_ctx, void* cd, |
| grpc_error* error) { |
| channel_data* chand = (channel_data*)cd; |
| grpc_server* server = chand->server; |
| GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "server"); |
| server_unref(exec_ctx, server); |
| } |
| |
| static void destroy_channel(grpc_exec_ctx* exec_ctx, channel_data* chand, |
| grpc_error* error) { |
| if (is_channel_orphaned(chand)) return; |
| GPR_ASSERT(chand->server != nullptr); |
| orphan_channel(chand); |
| server_ref(chand->server); |
| maybe_finish_shutdown(exec_ctx, chand->server); |
| GRPC_CLOSURE_INIT(&chand->finish_destroy_channel_closure, |
| finish_destroy_channel, chand, grpc_schedule_on_exec_ctx); |
| |
| if (grpc_server_channel_trace.enabled() && error != GRPC_ERROR_NONE) { |
| const char* msg = grpc_error_string(error); |
| gpr_log(GPR_INFO, "Disconnected client: %s", msg); |
| } |
| GRPC_ERROR_UNREF(error); |
| |
| grpc_transport_op* op = |
| grpc_make_transport_op(&chand->finish_destroy_channel_closure); |
| op->set_accept_stream = true; |
| grpc_channel_next_op(exec_ctx, |
| grpc_channel_stack_element( |
| grpc_channel_get_channel_stack(chand->channel), 0), |
| op); |
| } |
| |
| static void done_request_event(grpc_exec_ctx* exec_ctx, void* req, |
| grpc_cq_completion* c) { |
| gpr_free(req); |
| } |
| |
| static void publish_call(grpc_exec_ctx* exec_ctx, grpc_server* server, |
| call_data* calld, size_t cq_idx, requested_call* rc) { |
| grpc_call_set_completion_queue(exec_ctx, calld->call, rc->cq_bound_to_call); |
| grpc_call* call = calld->call; |
| *rc->call = call; |
| calld->cq_new = server->cqs[cq_idx]; |
| GPR_SWAP(grpc_metadata_array, *rc->initial_metadata, calld->initial_metadata); |
| switch (rc->type) { |
| case BATCH_CALL: |
| GPR_ASSERT(calld->host_set); |
| GPR_ASSERT(calld->path_set); |
| rc->data.batch.details->host = grpc_slice_ref_internal(calld->host); |
| rc->data.batch.details->method = grpc_slice_ref_internal(calld->path); |
| rc->data.batch.details->deadline = |
| grpc_millis_to_timespec(calld->deadline, GPR_CLOCK_MONOTONIC); |
| rc->data.batch.details->flags = calld->recv_initial_metadata_flags; |
| break; |
| case REGISTERED_CALL: |
| *rc->data.registered.deadline = |
| grpc_millis_to_timespec(calld->deadline, GPR_CLOCK_MONOTONIC); |
| if (rc->data.registered.optional_payload) { |
| *rc->data.registered.optional_payload = calld->payload; |
| calld->payload = nullptr; |
| } |
| break; |
| default: |
| GPR_UNREACHABLE_CODE(return ); |
| } |
| |
| grpc_cq_end_op(exec_ctx, calld->cq_new, rc->tag, GRPC_ERROR_NONE, |
| done_request_event, rc, &rc->completion); |
| } |
| |
| static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg, |
| grpc_error* error) { |
| grpc_call_element* call_elem = (grpc_call_element*)arg; |
| call_data* calld = (call_data*)call_elem->call_data; |
| channel_data* chand = (channel_data*)call_elem->channel_data; |
| request_matcher* rm = calld->matcher; |
| grpc_server* server = rm->server; |
| |
| if (error != GRPC_ERROR_NONE || gpr_atm_acq_load(&server->shutdown_flag)) { |
| gpr_atm_no_barrier_store(&calld->state, ZOMBIED); |
| GRPC_CLOSURE_INIT( |
| &calld->kill_zombie_closure, kill_zombie, |
| grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0), |
| grpc_schedule_on_exec_ctx); |
| GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, |
| GRPC_ERROR_REF(error)); |
| return; |
| } |
| |
| for (size_t i = 0; i < server->cq_count; i++) { |
| size_t cq_idx = (chand->cq_idx + i) % server->cq_count; |
| requested_call* rc = |
| (requested_call*)gpr_locked_mpscq_try_pop(&rm->requests_per_cq[cq_idx]); |
| if (rc == nullptr) { |
| continue; |
| } else { |
| GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i); |
| gpr_atm_no_barrier_store(&calld->state, ACTIVATED); |
| publish_call(exec_ctx, server, calld, cq_idx, rc); |
| return; /* early out */ |
| } |
| } |
| |
| /* no cq to take the request found: queue it on the slow list */ |
| GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx); |
| gpr_mu_lock(&server->mu_call); |
| |
| // We need to ensure that all the queues are empty. We do this under |
| // the server mu_call lock to ensure that if something is added to |
| // an empty request queue, it will block until the call is actually |
| // added to the pending list. |
| for (size_t i = 0; i < server->cq_count; i++) { |
| size_t cq_idx = (chand->cq_idx + i) % server->cq_count; |
| requested_call* rc = |
| (requested_call*)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]); |
| if (rc == nullptr) { |
| continue; |
| } else { |
| gpr_mu_unlock(&server->mu_call); |
| GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i + server->cq_count); |
| gpr_atm_no_barrier_store(&calld->state, ACTIVATED); |
| publish_call(exec_ctx, server, calld, cq_idx, rc); |
| return; /* early out */ |
| } |
| } |
| |
| gpr_atm_no_barrier_store(&calld->state, PENDING); |
| if (rm->pending_head == nullptr) { |
| rm->pending_tail = rm->pending_head = calld; |
| } else { |
| rm->pending_tail->pending_next = calld; |
| rm->pending_tail = calld; |
| } |
| calld->pending_next = nullptr; |
| gpr_mu_unlock(&server->mu_call); |
| } |
| |
| static void finish_start_new_rpc( |
| grpc_exec_ctx* exec_ctx, grpc_server* server, grpc_call_element* elem, |
| request_matcher* rm, |
| grpc_server_register_method_payload_handling payload_handling) { |
| call_data* calld = (call_data*)elem->call_data; |
| |
| if (gpr_atm_acq_load(&server->shutdown_flag)) { |
| gpr_atm_no_barrier_store(&calld->state, ZOMBIED); |
| GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem, |
| grpc_schedule_on_exec_ctx); |
| GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE); |
| return; |
| } |
| |
| calld->matcher = rm; |
| |
| switch (payload_handling) { |
| case GRPC_SRM_PAYLOAD_NONE: |
| publish_new_rpc(exec_ctx, elem, GRPC_ERROR_NONE); |
| break; |
| case GRPC_SRM_PAYLOAD_READ_INITIAL_BYTE_BUFFER: { |
| grpc_op op; |
| memset(&op, 0, sizeof(op)); |
| op.op = GRPC_OP_RECV_MESSAGE; |
| op.data.recv_message.recv_message = &calld->payload; |
| GRPC_CLOSURE_INIT(&calld->publish, publish_new_rpc, elem, |
| grpc_schedule_on_exec_ctx); |
| grpc_call_start_batch_and_execute(exec_ctx, calld->call, &op, 1, |
| &calld->publish); |
| break; |
| } |
| } |
| } |
| |
| static void start_new_rpc(grpc_exec_ctx* exec_ctx, grpc_call_element* elem) { |
| channel_data* chand = (channel_data*)elem->channel_data; |
| call_data* calld = (call_data*)elem->call_data; |
| grpc_server* server = chand->server; |
| uint32_t i; |
| uint32_t hash; |
| channel_registered_method* rm; |
| |
| if (chand->registered_methods && calld->path_set && calld->host_set) { |
| /* TODO(ctiller): unify these two searches */ |
| /* check for an exact match with host */ |
| hash = GRPC_MDSTR_KV_HASH(grpc_slice_hash(calld->host), |
| grpc_slice_hash(calld->path)); |
| for (i = 0; i <= chand->registered_method_max_probes; i++) { |
| rm = &chand->registered_methods[(hash + i) % |
| chand->registered_method_slots]; |
| if (!rm) break; |
| if (!rm->has_host) continue; |
| if (!grpc_slice_eq(rm->host, calld->host)) continue; |
| if (!grpc_slice_eq(rm->method, calld->path)) continue; |
| if ((rm->flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) && |
| 0 == (calld->recv_initial_metadata_flags & |
| GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) { |
| continue; |
| } |
| finish_start_new_rpc(exec_ctx, server, elem, |
| &rm->server_registered_method->matcher, |
| rm->server_registered_method->payload_handling); |
| return; |
| } |
| /* check for a wildcard method definition (no host set) */ |
| hash = GRPC_MDSTR_KV_HASH(0, grpc_slice_hash(calld->path)); |
| for (i = 0; i <= chand->registered_method_max_probes; i++) { |
| rm = &chand->registered_methods[(hash + i) % |
| chand->registered_method_slots]; |
| if (!rm) break; |
| if (rm->has_host) continue; |
| if (!grpc_slice_eq(rm->method, calld->path)) continue; |
| if ((rm->flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) && |
| 0 == (calld->recv_initial_metadata_flags & |
| GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) { |
| continue; |
| } |
| finish_start_new_rpc(exec_ctx, server, elem, |
| &rm->server_registered_method->matcher, |
| rm->server_registered_method->payload_handling); |
| return; |
| } |
| } |
| finish_start_new_rpc(exec_ctx, server, elem, |
| &server->unregistered_request_matcher, |
| GRPC_SRM_PAYLOAD_NONE); |
| } |
| |
| 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 done_shutdown_event(grpc_exec_ctx* exec_ctx, void* server, |
| grpc_cq_completion* completion) { |
| server_unref(exec_ctx, (grpc_server*)server); |
| } |
| |
| static int num_channels(grpc_server* server) { |
| channel_data* chand; |
| int n = 0; |
| for (chand = server->root_channel_data.next; |
| chand != &server->root_channel_data; chand = chand->next) { |
| n++; |
| } |
| return n; |
| } |
| |
| static void kill_pending_work_locked(grpc_exec_ctx* exec_ctx, |
| grpc_server* server, grpc_error* error) { |
| if (server->started) { |
| request_matcher_kill_requests(exec_ctx, server, |
| &server->unregistered_request_matcher, |
| GRPC_ERROR_REF(error)); |
| request_matcher_zombify_all_pending_calls( |
| exec_ctx, &server->unregistered_request_matcher); |
| for (registered_method* rm = server->registered_methods; rm; |
| rm = rm->next) { |
| request_matcher_kill_requests(exec_ctx, server, &rm->matcher, |
| GRPC_ERROR_REF(error)); |
| request_matcher_zombify_all_pending_calls(exec_ctx, &rm->matcher); |
| } |
| } |
| GRPC_ERROR_UNREF(error); |
| } |
| |
| static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx, |
| grpc_server* server) { |
| size_t i; |
| if (!gpr_atm_acq_load(&server->shutdown_flag) || server->shutdown_published) { |
| return; |
| } |
| |
| kill_pending_work_locked( |
| exec_ctx, server, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown")); |
| |
| if (server->root_channel_data.next != &server->root_channel_data || |
| server->listeners_destroyed < num_listeners(server)) { |
| if (gpr_time_cmp(gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), |
| server->last_shutdown_message_time), |
| gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) { |
| server->last_shutdown_message_time = gpr_now(GPR_CLOCK_REALTIME); |
| gpr_log(GPR_DEBUG, |
| "Waiting for %d channels and %d/%d listeners to be destroyed" |
| " before shutting down server", |
| num_channels(server), |
| num_listeners(server) - server->listeners_destroyed, |
| num_listeners(server)); |
| } |
| return; |
| } |
| server->shutdown_published = 1; |
| for (i = 0; i < server->num_shutdown_tags; i++) { |
| server_ref(server); |
| grpc_cq_end_op(exec_ctx, server->shutdown_tags[i].cq, |
| server->shutdown_tags[i].tag, GRPC_ERROR_NONE, |
| done_shutdown_event, server, |
| &server->shutdown_tags[i].completion); |
| } |
| } |
| |
| static void server_on_recv_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr, |
| grpc_error* error) { |
| grpc_call_element* elem = (grpc_call_element*)ptr; |
| call_data* calld = (call_data*)elem->call_data; |
| grpc_millis op_deadline; |
| |
| if (error == GRPC_ERROR_NONE) { |
| GPR_ASSERT(calld->recv_initial_metadata->idx.named.path != nullptr); |
| GPR_ASSERT(calld->recv_initial_metadata->idx.named.authority != nullptr); |
| calld->path = grpc_slice_ref_internal( |
| GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.path->md)); |
| calld->host = grpc_slice_ref_internal( |
| GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.authority->md)); |
| calld->path_set = true; |
| calld->host_set = true; |
| grpc_metadata_batch_remove(exec_ctx, calld->recv_initial_metadata, |
| calld->recv_initial_metadata->idx.named.path); |
| grpc_metadata_batch_remove( |
| exec_ctx, calld->recv_initial_metadata, |
| calld->recv_initial_metadata->idx.named.authority); |
| } else { |
| GRPC_ERROR_REF(error); |
| } |
| op_deadline = calld->recv_initial_metadata->deadline; |
| if (op_deadline != GRPC_MILLIS_INF_FUTURE) { |
| calld->deadline = op_deadline; |
| } |
| if (calld->host_set && calld->path_set) { |
| /* do nothing */ |
| } else { |
| grpc_error* src_error = error; |
| error = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING( |
| "Missing :authority or :path", &error, 1); |
| GRPC_ERROR_UNREF(src_error); |
| } |
| |
| GRPC_CLOSURE_RUN(exec_ctx, calld->on_done_recv_initial_metadata, error); |
| } |
| |
| static void server_mutate_op(grpc_call_element* elem, |
| grpc_transport_stream_op_batch* op) { |
| call_data* calld = (call_data*)elem->call_data; |
| |
| if (op->recv_initial_metadata) { |
| GPR_ASSERT(op->payload->recv_initial_metadata.recv_flags == nullptr); |
| calld->recv_initial_metadata = |
| op->payload->recv_initial_metadata.recv_initial_metadata; |
| calld->on_done_recv_initial_metadata = |
| op->payload->recv_initial_metadata.recv_initial_metadata_ready; |
| op->payload->recv_initial_metadata.recv_initial_metadata_ready = |
| &calld->server_on_recv_initial_metadata; |
| op->payload->recv_initial_metadata.recv_flags = |
| &calld->recv_initial_metadata_flags; |
| } |
| } |
| |
| static void server_start_transport_stream_op_batch( |
| grpc_exec_ctx* exec_ctx, grpc_call_element* elem, |
| grpc_transport_stream_op_batch* op) { |
| server_mutate_op(elem, op); |
| grpc_call_next_op(exec_ctx, elem, op); |
| } |
| |
| static void got_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr, |
| grpc_error* error) { |
| grpc_call_element* elem = (grpc_call_element*)ptr; |
| call_data* calld = (call_data*)elem->call_data; |
| if (error == GRPC_ERROR_NONE) { |
| start_new_rpc(exec_ctx, elem); |
| } else { |
| if (gpr_atm_full_cas(&calld->state, NOT_STARTED, ZOMBIED)) { |
| GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem, |
| grpc_schedule_on_exec_ctx); |
| GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, |
| GRPC_ERROR_NONE); |
| } else if (gpr_atm_full_cas(&calld->state, PENDING, ZOMBIED)) { |
| /* zombied call will be destroyed when it's removed from the pending |
| queue... later */ |
| } |
| } |
| } |
| |
| static void accept_stream(grpc_exec_ctx* exec_ctx, void* cd, |
| grpc_transport* transport, |
| const void* transport_server_data) { |
| channel_data* chand = (channel_data*)cd; |
| /* create a call */ |
| grpc_call_create_args args; |
| memset(&args, 0, sizeof(args)); |
| args.channel = chand->channel; |
| args.server_transport_data = transport_server_data; |
| args.send_deadline = GRPC_MILLIS_INF_FUTURE; |
| grpc_call* call; |
| grpc_error* error = grpc_call_create(exec_ctx, &args, &call); |
| grpc_call_element* elem = |
| grpc_call_stack_element(grpc_call_get_call_stack(call), 0); |
| if (error != GRPC_ERROR_NONE) { |
| got_initial_metadata(exec_ctx, elem, error); |
| GRPC_ERROR_UNREF(error); |
| return; |
| } |
| call_data* calld = (call_data*)elem->call_data; |
| grpc_op op; |
| memset(&op, 0, sizeof(op)); |
| op.op = GRPC_OP_RECV_INITIAL_METADATA; |
| op.data.recv_initial_metadata.recv_initial_metadata = |
| &calld->initial_metadata; |
| GRPC_CLOSURE_INIT(&calld->got_initial_metadata, got_initial_metadata, elem, |
| grpc_schedule_on_exec_ctx); |
| grpc_call_start_batch_and_execute(exec_ctx, call, &op, 1, |
| &calld->got_initial_metadata); |
| } |
| |
| static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* cd, |
| grpc_error* error) { |
| channel_data* chand = (channel_data*)cd; |
| grpc_server* server = chand->server; |
| if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) { |
| grpc_transport_op* op = grpc_make_transport_op(nullptr); |
| op->on_connectivity_state_change = &chand->channel_connectivity_changed; |
| op->connectivity_state = &chand->connectivity_state; |
| grpc_channel_next_op(exec_ctx, |
| grpc_channel_stack_element( |
| grpc_channel_get_channel_stack(chand->channel), 0), |
| op); |
| } else { |
| gpr_mu_lock(&server->mu_global); |
| destroy_channel(exec_ctx, chand, GRPC_ERROR_REF(error)); |
| gpr_mu_unlock(&server->mu_global); |
| GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "connectivity"); |
| } |
| } |
| |
| static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx, |
| grpc_call_element* elem, |
| const grpc_call_element_args* args) { |
| call_data* calld = (call_data*)elem->call_data; |
| channel_data* chand = (channel_data*)elem->channel_data; |
| memset(calld, 0, sizeof(call_data)); |
| calld->deadline = GRPC_MILLIS_INF_FUTURE; |
| calld->call = grpc_call_from_top_element(elem); |
| |
| GRPC_CLOSURE_INIT(&calld->server_on_recv_initial_metadata, |
| server_on_recv_initial_metadata, elem, |
| grpc_schedule_on_exec_ctx); |
| |
| server_ref(chand->server); |
| return GRPC_ERROR_NONE; |
| } |
| |
| static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem, |
| const grpc_call_final_info* final_info, |
| grpc_closure* ignored) { |
| channel_data* chand = (channel_data*)elem->channel_data; |
| call_data* calld = (call_data*)elem->call_data; |
| |
| GPR_ASSERT(calld->state != PENDING); |
| |
| if (calld->host_set) { |
| grpc_slice_unref_internal(exec_ctx, calld->host); |
| } |
| if (calld->path_set) { |
| grpc_slice_unref_internal(exec_ctx, calld->path); |
| } |
| grpc_metadata_array_destroy(&calld->initial_metadata); |
| grpc_byte_buffer_destroy(calld->payload); |
| |
| server_unref(exec_ctx, chand->server); |
| } |
| |
| static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx, |
| grpc_channel_element* elem, |
| grpc_channel_element_args* args) { |
| channel_data* chand = (channel_data*)elem->channel_data; |
| GPR_ASSERT(args->is_first); |
| GPR_ASSERT(!args->is_last); |
| chand->server = nullptr; |
| chand->channel = nullptr; |
| chand->next = chand->prev = chand; |
| chand->registered_methods = nullptr; |
| chand->connectivity_state = GRPC_CHANNEL_IDLE; |
| GRPC_CLOSURE_INIT(&chand->channel_connectivity_changed, |
| channel_connectivity_changed, chand, |
| grpc_schedule_on_exec_ctx); |
| return GRPC_ERROR_NONE; |
| } |
| |
| static void destroy_channel_elem(grpc_exec_ctx* exec_ctx, |
| grpc_channel_element* elem) { |
| size_t i; |
| channel_data* chand = (channel_data*)elem->channel_data; |
| if (chand->registered_methods) { |
| for (i = 0; i < chand->registered_method_slots; i++) { |
| grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].method); |
| if (chand->registered_methods[i].has_host) { |
| grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].host); |
| } |
| } |
| gpr_free(chand->registered_methods); |
| } |
| if (chand->server) { |
| gpr_mu_lock(&chand->server->mu_global); |
| chand->next->prev = chand->prev; |
| chand->prev->next = chand->next; |
| chand->next = chand->prev = chand; |
| maybe_finish_shutdown(exec_ctx, chand->server); |
| gpr_mu_unlock(&chand->server->mu_global); |
| server_unref(exec_ctx, chand->server); |
| } |
| } |
| |
| const grpc_channel_filter grpc_server_top_filter = { |
| server_start_transport_stream_op_batch, |
| 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_channel_next_get_info, |
| "server", |
| }; |
| |
| static void register_completion_queue(grpc_server* server, |
| grpc_completion_queue* cq, |
| void* reserved) { |
| size_t i, n; |
| GPR_ASSERT(!reserved); |
| for (i = 0; i < server->cq_count; i++) { |
| if (server->cqs[i] == cq) return; |
| } |
| |
| GRPC_CQ_INTERNAL_REF(cq, "server"); |
| n = server->cq_count++; |
| server->cqs = (grpc_completion_queue**)gpr_realloc( |
| server->cqs, server->cq_count * sizeof(grpc_completion_queue*)); |
| server->cqs[n] = cq; |
| } |
| |
| void grpc_server_register_completion_queue(grpc_server* server, |
| grpc_completion_queue* cq, |
| void* reserved) { |
| GRPC_API_TRACE( |
| "grpc_server_register_completion_queue(server=%p, cq=%p, reserved=%p)", 3, |
| (server, cq, reserved)); |
| |
| if (grpc_get_cq_completion_type(cq) != GRPC_CQ_NEXT) { |
| gpr_log(GPR_INFO, |
| "Completion queue which is not of type GRPC_CQ_NEXT is being " |
| "registered as a server-completion-queue"); |
| /* Ideally we should log an error and abort but ruby-wrapped-language API |
| calls grpc_completion_queue_pluck() on server completion queues */ |
| } |
| |
| register_completion_queue(server, cq, reserved); |
| } |
| |
| grpc_server* grpc_server_create(const grpc_channel_args* args, void* reserved) { |
| GRPC_API_TRACE("grpc_server_create(%p, %p)", 2, (args, reserved)); |
| |
| grpc_server* server = (grpc_server*)gpr_zalloc(sizeof(grpc_server)); |
| |
| gpr_mu_init(&server->mu_global); |
| gpr_mu_init(&server->mu_call); |
| gpr_cv_init(&server->starting_cv); |
| |
| /* decremented by grpc_server_destroy */ |
| gpr_ref_init(&server->internal_refcount, 1); |
| server->root_channel_data.next = server->root_channel_data.prev = |
| &server->root_channel_data; |
| |
| server->channel_args = grpc_channel_args_copy(args); |
| |
| return server; |
| } |
| |
| static int streq(const char* a, const char* b) { |
| if (a == nullptr && b == nullptr) return 1; |
| if (a == nullptr) return 0; |
| if (b == nullptr) return 0; |
| return 0 == strcmp(a, b); |
| } |
| |
| void* grpc_server_register_method( |
| grpc_server* server, const char* method, const char* host, |
| grpc_server_register_method_payload_handling payload_handling, |
| uint32_t flags) { |
| registered_method* m; |
| GRPC_API_TRACE( |
| "grpc_server_register_method(server=%p, method=%s, host=%s, " |
| "flags=0x%08x)", |
| 4, (server, method, host, flags)); |
| if (!method) { |
| gpr_log(GPR_ERROR, |
| "grpc_server_register_method method string cannot be NULL"); |
| return nullptr; |
| } |
| for (m = server->registered_methods; m; m = m->next) { |
| if (streq(m->method, method) && streq(m->host, host)) { |
| gpr_log(GPR_ERROR, "duplicate registration for %s@%s", method, |
| host ? host : "*"); |
| return nullptr; |
| } |
| } |
| if ((flags & ~GRPC_INITIAL_METADATA_USED_MASK) != 0) { |
| gpr_log(GPR_ERROR, "grpc_server_register_method invalid flags 0x%08x", |
| flags); |
| return nullptr; |
| } |
| m = (registered_method*)gpr_zalloc(sizeof(registered_method)); |
| m->method = gpr_strdup(method); |
| m->host = gpr_strdup(host); |
| m->next = server->registered_methods; |
| m->payload_handling = payload_handling; |
| m->flags = flags; |
| server->registered_methods = m; |
| return m; |
| } |
| |
| static void start_listeners(grpc_exec_ctx* exec_ctx, void* s, |
| grpc_error* error) { |
| grpc_server* server = (grpc_server*)s; |
| for (listener* l = server->listeners; l; l = l->next) { |
| l->start(exec_ctx, server, l->arg, server->pollsets, server->pollset_count); |
| } |
| |
| gpr_mu_lock(&server->mu_global); |
| server->starting = false; |
| gpr_cv_signal(&server->starting_cv); |
| gpr_mu_unlock(&server->mu_global); |
| |
| server_unref(exec_ctx, server); |
| } |
| |
| void grpc_server_start(grpc_server* server) { |
| size_t i; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| GRPC_API_TRACE("grpc_server_start(server=%p)", 1, (server)); |
| |
| server->started = true; |
| server->pollset_count = 0; |
| server->pollsets = |
| (grpc_pollset**)gpr_malloc(sizeof(grpc_pollset*) * server->cq_count); |
| for (i = 0; i < server->cq_count; i++) { |
| if (grpc_cq_can_listen(server->cqs[i])) { |
| server->pollsets[server->pollset_count++] = |
| grpc_cq_pollset(server->cqs[i]); |
| } |
| } |
| request_matcher_init(&server->unregistered_request_matcher, server); |
| for (registered_method* rm = server->registered_methods; rm; rm = rm->next) { |
| request_matcher_init(&rm->matcher, server); |
| } |
| |
| server_ref(server); |
| server->starting = true; |
| GRPC_CLOSURE_SCHED( |
| &exec_ctx, |
| GRPC_CLOSURE_CREATE(start_listeners, server, |
| grpc_executor_scheduler(GRPC_EXECUTOR_SHORT)), |
| GRPC_ERROR_NONE); |
| |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| void grpc_server_get_pollsets(grpc_server* server, grpc_pollset*** pollsets, |
| size_t* pollset_count) { |
| *pollset_count = server->pollset_count; |
| *pollsets = server->pollsets; |
| } |
| |
| void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* s, |
| grpc_transport* transport, |
| grpc_pollset* accepting_pollset, |
| const grpc_channel_args* args) { |
| size_t num_registered_methods; |
| size_t alloc; |
| registered_method* rm; |
| channel_registered_method* crm; |
| grpc_channel* channel; |
| channel_data* chand; |
| uint32_t hash; |
| size_t slots; |
| uint32_t probes; |
| uint32_t max_probes = 0; |
| grpc_transport_op* op = nullptr; |
| |
| channel = grpc_channel_create(exec_ctx, nullptr, args, GRPC_SERVER_CHANNEL, |
| transport); |
| chand = (channel_data*)grpc_channel_stack_element( |
| grpc_channel_get_channel_stack(channel), 0) |
| ->channel_data; |
| chand->server = s; |
| server_ref(s); |
| chand->channel = channel; |
| |
| size_t cq_idx; |
| for (cq_idx = 0; cq_idx < s->cq_count; cq_idx++) { |
| if (grpc_cq_pollset(s->cqs[cq_idx]) == accepting_pollset) break; |
| } |
| if (cq_idx == s->cq_count) { |
| /* completion queue not found: pick a random one to publish new calls to */ |
| cq_idx = (size_t)rand() % s->cq_count; |
| } |
| chand->cq_idx = cq_idx; |
| |
| num_registered_methods = 0; |
| for (rm = s->registered_methods; rm; rm = rm->next) { |
| num_registered_methods++; |
| } |
| /* build a lookup table phrased in terms of mdstr's in this channels context |
| to quickly find registered methods */ |
| if (num_registered_methods > 0) { |
| slots = 2 * num_registered_methods; |
| alloc = sizeof(channel_registered_method) * slots; |
| chand->registered_methods = (channel_registered_method*)gpr_zalloc(alloc); |
| for (rm = s->registered_methods; rm; rm = rm->next) { |
| grpc_slice host; |
| bool has_host; |
| grpc_slice method; |
| if (rm->host != nullptr) { |
| host = grpc_slice_intern(grpc_slice_from_static_string(rm->host)); |
| has_host = true; |
| } else { |
| has_host = false; |
| } |
| method = grpc_slice_intern(grpc_slice_from_static_string(rm->method)); |
| hash = GRPC_MDSTR_KV_HASH(has_host ? grpc_slice_hash(host) : 0, |
| grpc_slice_hash(method)); |
| for (probes = 0; chand->registered_methods[(hash + probes) % slots] |
| .server_registered_method != nullptr; |
| probes++) |
| ; |
| if (probes > max_probes) max_probes = probes; |
| crm = &chand->registered_methods[(hash + probes) % slots]; |
| crm->server_registered_method = rm; |
| crm->flags = rm->flags; |
| crm->has_host = has_host; |
| if (has_host) { |
| crm->host = host; |
| } |
| crm->method = method; |
| } |
| GPR_ASSERT(slots <= UINT32_MAX); |
| chand->registered_method_slots = (uint32_t)slots; |
| chand->registered_method_max_probes = max_probes; |
| } |
| |
| gpr_mu_lock(&s->mu_global); |
| chand->next = &s->root_channel_data; |
| chand->prev = chand->next->prev; |
| chand->next->prev = chand->prev->next = chand; |
| gpr_mu_unlock(&s->mu_global); |
| |
| GRPC_CHANNEL_INTERNAL_REF(channel, "connectivity"); |
| op = grpc_make_transport_op(nullptr); |
| op->set_accept_stream = true; |
| op->set_accept_stream_fn = accept_stream; |
| op->set_accept_stream_user_data = chand; |
| op->on_connectivity_state_change = &chand->channel_connectivity_changed; |
| op->connectivity_state = &chand->connectivity_state; |
| if (gpr_atm_acq_load(&s->shutdown_flag) != 0) { |
| op->disconnect_with_error = |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown"); |
| } |
| grpc_transport_perform_op(exec_ctx, transport, op); |
| } |
| |
| void done_published_shutdown(grpc_exec_ctx* exec_ctx, void* done_arg, |
| grpc_cq_completion* storage) { |
| (void)done_arg; |
| gpr_free(storage); |
| } |
| |
| static void listener_destroy_done(grpc_exec_ctx* exec_ctx, void* s, |
| grpc_error* error) { |
| grpc_server* server = (grpc_server*)s; |
| gpr_mu_lock(&server->mu_global); |
| server->listeners_destroyed++; |
| maybe_finish_shutdown(exec_ctx, server); |
| gpr_mu_unlock(&server->mu_global); |
| } |
| |
| void grpc_server_shutdown_and_notify(grpc_server* server, |
| grpc_completion_queue* cq, void* tag) { |
| listener* l; |
| shutdown_tag* sdt; |
| channel_broadcaster broadcaster; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| GRPC_API_TRACE("grpc_server_shutdown_and_notify(server=%p, cq=%p, tag=%p)", 3, |
| (server, cq, tag)); |
| |
| /* wait for startup to be finished: locks mu_global */ |
| gpr_mu_lock(&server->mu_global); |
| while (server->starting) { |
| gpr_cv_wait(&server->starting_cv, &server->mu_global, |
| gpr_inf_future(GPR_CLOCK_MONOTONIC)); |
| } |
| |
| /* stay locked, and gather up some stuff to do */ |
| GPR_ASSERT(grpc_cq_begin_op(cq, tag)); |
| if (server->shutdown_published) { |
| grpc_cq_end_op(&exec_ctx, cq, tag, GRPC_ERROR_NONE, done_published_shutdown, |
| nullptr, |
| (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion))); |
| gpr_mu_unlock(&server->mu_global); |
| goto done; |
| } |
| server->shutdown_tags = (shutdown_tag*)gpr_realloc( |
| server->shutdown_tags, |
| sizeof(shutdown_tag) * (server->num_shutdown_tags + 1)); |
| sdt = &server->shutdown_tags[server->num_shutdown_tags++]; |
| sdt->tag = tag; |
| sdt->cq = cq; |
| if (gpr_atm_acq_load(&server->shutdown_flag)) { |
| gpr_mu_unlock(&server->mu_global); |
| goto done; |
| } |
| |
| server->last_shutdown_message_time = gpr_now(GPR_CLOCK_REALTIME); |
| |
| channel_broadcaster_init(server, &broadcaster); |
| |
| gpr_atm_rel_store(&server->shutdown_flag, 1); |
| |
| /* collect all unregistered then registered calls */ |
| gpr_mu_lock(&server->mu_call); |
| kill_pending_work_locked( |
| &exec_ctx, server, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown")); |
| gpr_mu_unlock(&server->mu_call); |
| |
| maybe_finish_shutdown(&exec_ctx, server); |
| gpr_mu_unlock(&server->mu_global); |
| |
| /* Shutdown listeners */ |
| for (l = server->listeners; l; l = l->next) { |
| GRPC_CLOSURE_INIT(&l->destroy_done, listener_destroy_done, server, |
| grpc_schedule_on_exec_ctx); |
| l->destroy(&exec_ctx, server, l->arg, &l->destroy_done); |
| } |
| |
| channel_broadcaster_shutdown(&exec_ctx, &broadcaster, true /* send_goaway */, |
| GRPC_ERROR_NONE); |
| |
| done: |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| void grpc_server_cancel_all_calls(grpc_server* server) { |
| channel_broadcaster broadcaster; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| GRPC_API_TRACE("grpc_server_cancel_all_calls(server=%p)", 1, (server)); |
| |
| gpr_mu_lock(&server->mu_global); |
| channel_broadcaster_init(server, &broadcaster); |
| gpr_mu_unlock(&server->mu_global); |
| |
| channel_broadcaster_shutdown( |
| &exec_ctx, &broadcaster, false /* send_goaway */, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Cancelling all calls")); |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| void grpc_server_destroy(grpc_server* server) { |
| listener* l; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| GRPC_API_TRACE("grpc_server_destroy(server=%p)", 1, (server)); |
| |
| gpr_mu_lock(&server->mu_global); |
| GPR_ASSERT(gpr_atm_acq_load(&server->shutdown_flag) || !server->listeners); |
| GPR_ASSERT(server->listeners_destroyed == num_listeners(server)); |
| |
| while (server->listeners) { |
| l = server->listeners; |
| server->listeners = l->next; |
| gpr_free(l); |
| } |
| |
| gpr_mu_unlock(&server->mu_global); |
| |
| server_unref(&exec_ctx, server); |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| void grpc_server_add_listener( |
| grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg, |
| void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg, |
| grpc_pollset** pollsets, size_t pollset_count), |
| void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg, |
| grpc_closure* on_done)) { |
| listener* l = (listener*)gpr_malloc(sizeof(listener)); |
| l->arg = arg; |
| l->start = start; |
| l->destroy = destroy; |
| l->next = server->listeners; |
| server->listeners = l; |
| } |
| |
| static grpc_call_error queue_call_request(grpc_exec_ctx* exec_ctx, |
| grpc_server* server, size_t cq_idx, |
| requested_call* rc) { |
| call_data* calld = nullptr; |
| request_matcher* rm = nullptr; |
| if (gpr_atm_acq_load(&server->shutdown_flag)) { |
| fail_call(exec_ctx, server, cq_idx, rc, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown")); |
| return GRPC_CALL_OK; |
| } |
| switch (rc->type) { |
| case BATCH_CALL: |
| rm = &server->unregistered_request_matcher; |
| break; |
| case REGISTERED_CALL: |
| rm = &rc->data.registered.method->matcher; |
| break; |
| } |
| if (gpr_locked_mpscq_push(&rm->requests_per_cq[cq_idx], &rc->request_link)) { |
| /* this was the first queued request: we need to lock and start |
| matching calls */ |
| gpr_mu_lock(&server->mu_call); |
| while ((calld = rm->pending_head) != nullptr) { |
| rc = (requested_call*)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]); |
| if (rc == nullptr) break; |
| rm->pending_head = calld->pending_next; |
| gpr_mu_unlock(&server->mu_call); |
| if (!gpr_atm_full_cas(&calld->state, PENDING, ACTIVATED)) { |
| // Zombied Call |
| GRPC_CLOSURE_INIT( |
| &calld->kill_zombie_closure, kill_zombie, |
| grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0), |
| grpc_schedule_on_exec_ctx); |
| GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, |
| GRPC_ERROR_NONE); |
| } else { |
| publish_call(exec_ctx, server, calld, cq_idx, rc); |
| } |
| gpr_mu_lock(&server->mu_call); |
| } |
| gpr_mu_unlock(&server->mu_call); |
| } |
| return GRPC_CALL_OK; |
| } |
| |
| grpc_call_error grpc_server_request_call( |
| grpc_server* server, grpc_call** call, grpc_call_details* details, |
| grpc_metadata_array* initial_metadata, |
| grpc_completion_queue* cq_bound_to_call, |
| grpc_completion_queue* cq_for_notification, void* tag) { |
| grpc_call_error error; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc)); |
| GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx); |
| GRPC_API_TRACE( |
| "grpc_server_request_call(" |
| "server=%p, call=%p, details=%p, initial_metadata=%p, " |
| "cq_bound_to_call=%p, cq_for_notification=%p, tag=%p)", |
| 7, |
| (server, call, details, initial_metadata, cq_bound_to_call, |
| cq_for_notification, tag)); |
| size_t cq_idx; |
| for (cq_idx = 0; cq_idx < server->cq_count; cq_idx++) { |
| if (server->cqs[cq_idx] == cq_for_notification) { |
| break; |
| } |
| } |
| if (cq_idx == server->cq_count) { |
| gpr_free(rc); |
| error = GRPC_CALL_ERROR_NOT_SERVER_COMPLETION_QUEUE; |
| goto done; |
| } |
| if (grpc_cq_begin_op(cq_for_notification, tag) == false) { |
| gpr_free(rc); |
| error = GRPC_CALL_ERROR_COMPLETION_QUEUE_SHUTDOWN; |
| goto done; |
| } |
| details->reserved = nullptr; |
| rc->cq_idx = cq_idx; |
| rc->type = BATCH_CALL; |
| rc->server = server; |
| rc->tag = tag; |
| rc->cq_bound_to_call = cq_bound_to_call; |
| rc->call = call; |
| rc->data.batch.details = details; |
| rc->initial_metadata = initial_metadata; |
| error = queue_call_request(&exec_ctx, server, cq_idx, rc); |
| done: |
| grpc_exec_ctx_finish(&exec_ctx); |
| return error; |
| } |
| |
| grpc_call_error grpc_server_request_registered_call( |
| grpc_server* server, void* rmp, grpc_call** call, gpr_timespec* deadline, |
| grpc_metadata_array* initial_metadata, grpc_byte_buffer** optional_payload, |
| grpc_completion_queue* cq_bound_to_call, |
| grpc_completion_queue* cq_for_notification, void* tag) { |
| grpc_call_error error; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc)); |
| registered_method* rm = (registered_method*)rmp; |
| GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx); |
| GRPC_API_TRACE( |
| "grpc_server_request_registered_call(" |
| "server=%p, rmp=%p, call=%p, deadline=%p, initial_metadata=%p, " |
| "optional_payload=%p, cq_bound_to_call=%p, cq_for_notification=%p, " |
| "tag=%p)", |
| 9, |
| (server, rmp, call, deadline, initial_metadata, optional_payload, |
| cq_bound_to_call, cq_for_notification, tag)); |
| |
| size_t cq_idx; |
| for (cq_idx = 0; cq_idx < server->cq_count; cq_idx++) { |
| if (server->cqs[cq_idx] == cq_for_notification) { |
| break; |
| } |
| } |
| if (cq_idx == server->cq_count) { |
| gpr_free(rc); |
| error = GRPC_CALL_ERROR_NOT_SERVER_COMPLETION_QUEUE; |
| goto done; |
| } |
| if ((optional_payload == nullptr) != |
| (rm->payload_handling == GRPC_SRM_PAYLOAD_NONE)) { |
| gpr_free(rc); |
| error = GRPC_CALL_ERROR_PAYLOAD_TYPE_MISMATCH; |
| goto done; |
| } |
| if (grpc_cq_begin_op(cq_for_notification, tag) == false) { |
| gpr_free(rc); |
| error = GRPC_CALL_ERROR_COMPLETION_QUEUE_SHUTDOWN; |
| goto done; |
| } |
| rc->cq_idx = cq_idx; |
| rc->type = REGISTERED_CALL; |
| rc->server = server; |
| rc->tag = tag; |
| rc->cq_bound_to_call = cq_bound_to_call; |
| rc->call = call; |
| rc->data.registered.method = rm; |
| rc->data.registered.deadline = deadline; |
| rc->initial_metadata = initial_metadata; |
| rc->data.registered.optional_payload = optional_payload; |
| error = queue_call_request(&exec_ctx, server, cq_idx, rc); |
| done: |
| grpc_exec_ctx_finish(&exec_ctx); |
| return error; |
| } |
| |
| static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server, |
| size_t cq_idx, requested_call* rc, grpc_error* error) { |
| *rc->call = nullptr; |
| rc->initial_metadata->count = 0; |
| GPR_ASSERT(error != GRPC_ERROR_NONE); |
| |
| grpc_cq_end_op(exec_ctx, server->cqs[cq_idx], rc->tag, error, |
| done_request_event, rc, &rc->completion); |
| } |
| |
| const grpc_channel_args* grpc_server_get_channel_args(grpc_server* server) { |
| return server->channel_args; |
| } |
| |
| int grpc_server_has_open_connections(grpc_server* server) { |
| int r; |
| gpr_mu_lock(&server->mu_global); |
| r = server->root_channel_data.next != &server->root_channel_data; |
| gpr_mu_unlock(&server->mu_global); |
| return r; |
| } |