| /* |
| * |
| * 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/surface/server.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "src/core/channel/census_filter.h" |
| #include "src/core/channel/channel_args.h" |
| #include "src/core/channel/connected_channel.h" |
| #include "src/core/iomgr/iomgr.h" |
| #include "src/core/support/string.h" |
| #include "src/core/surface/call.h" |
| #include "src/core/surface/channel.h" |
| #include "src/core/surface/completion_queue.h" |
| #include "src/core/surface/init.h" |
| #include "src/core/transport/metadata.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/useful.h> |
| |
| typedef enum { PENDING_START, ALL_CALLS, CALL_LIST_COUNT } call_list; |
| |
| typedef struct listener { |
| void *arg; |
| void (*start)(grpc_server *server, void *arg, grpc_pollset **pollsets, |
| size_t pollset_count); |
| void (*destroy)(grpc_server *server, void *arg); |
| struct listener *next; |
| } listener; |
| |
| typedef struct call_data call_data; |
| typedef struct channel_data channel_data; |
| typedef struct registered_method registered_method; |
| |
| typedef struct { |
| call_data *next; |
| call_data *prev; |
| } call_link; |
| |
| typedef enum { LEGACY_CALL, BATCH_CALL, REGISTERED_CALL } requested_call_type; |
| |
| typedef struct { |
| requested_call_type type; |
| void *tag; |
| union { |
| struct { |
| grpc_completion_queue *cq_bind; |
| grpc_call **call; |
| grpc_call_details *details; |
| grpc_metadata_array *initial_metadata; |
| } batch; |
| struct { |
| grpc_completion_queue *cq_bind; |
| grpc_call **call; |
| registered_method *registered_method; |
| gpr_timespec *deadline; |
| grpc_metadata_array *initial_metadata; |
| grpc_byte_buffer **optional_payload; |
| } registered; |
| } data; |
| } requested_call; |
| |
| typedef struct { |
| requested_call *calls; |
| size_t count; |
| size_t capacity; |
| } requested_call_array; |
| |
| struct registered_method { |
| char *method; |
| char *host; |
| call_data *pending; |
| requested_call_array requested; |
| grpc_completion_queue *cq; |
| registered_method *next; |
| }; |
| |
| typedef struct channel_registered_method { |
| registered_method *server_registered_method; |
| grpc_mdstr *method; |
| grpc_mdstr *host; |
| } channel_registered_method; |
| |
| struct channel_data { |
| grpc_server *server; |
| grpc_channel *channel; |
| grpc_mdstr *path_key; |
| grpc_mdstr *authority_key; |
| /* linked list of all channels on a server */ |
| channel_data *next; |
| channel_data *prev; |
| channel_registered_method *registered_methods; |
| gpr_uint32 registered_method_slots; |
| gpr_uint32 registered_method_max_probes; |
| }; |
| |
| struct grpc_server { |
| size_t channel_filter_count; |
| const grpc_channel_filter **channel_filters; |
| grpc_channel_args *channel_args; |
| grpc_completion_queue *unregistered_cq; |
| |
| grpc_completion_queue **cqs; |
| grpc_pollset **pollsets; |
| size_t cq_count; |
| |
| gpr_mu mu; |
| gpr_cv cv; |
| |
| registered_method *registered_methods; |
| requested_call_array requested_calls; |
| |
| gpr_uint8 shutdown; |
| size_t num_shutdown_tags; |
| void **shutdown_tags; |
| |
| call_data *lists[CALL_LIST_COUNT]; |
| channel_data root_channel_data; |
| |
| listener *listeners; |
| int listeners_destroyed; |
| gpr_refcount internal_refcount; |
| }; |
| |
| 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 legacy_data { |
| grpc_metadata_array initial_metadata; |
| } legacy_data; |
| |
| struct call_data { |
| grpc_call *call; |
| |
| call_state state; |
| gpr_timespec deadline; |
| grpc_mdstr *path; |
| grpc_mdstr *host; |
| |
| legacy_data *legacy; |
| grpc_completion_queue *cq_new; |
| |
| call_data **root[CALL_LIST_COUNT]; |
| call_link links[CALL_LIST_COUNT]; |
| }; |
| |
| #define SERVER_FROM_CALL_ELEM(elem) \ |
| (((channel_data *)(elem)->channel_data)->server) |
| |
| static void do_nothing(void *unused, grpc_op_error ignored) {} |
| |
| static void begin_call(grpc_server *server, call_data *calld, |
| requested_call *rc); |
| static void fail_call(grpc_server *server, requested_call *rc); |
| |
| static int call_list_join(call_data **root, call_data *call, call_list list) { |
| GPR_ASSERT(!call->root[list]); |
| call->root[list] = root; |
| if (!*root) { |
| *root = call; |
| call->links[list].next = call->links[list].prev = call; |
| } else { |
| call->links[list].next = *root; |
| call->links[list].prev = (*root)->links[list].prev; |
| call->links[list].next->links[list].prev = |
| call->links[list].prev->links[list].next = call; |
| } |
| return 1; |
| } |
| |
| static call_data *call_list_remove_head(call_data **root, call_list list) { |
| call_data *out = *root; |
| if (out) { |
| out->root[list] = NULL; |
| if (out->links[list].next == out) { |
| *root = NULL; |
| } else { |
| *root = out->links[list].next; |
| out->links[list].next->links[list].prev = out->links[list].prev; |
| out->links[list].prev->links[list].next = out->links[list].next; |
| } |
| } |
| return out; |
| } |
| |
| static int call_list_remove(call_data *call, call_list list) { |
| call_data **root = call->root[list]; |
| if (root == NULL) return 0; |
| call->root[list] = NULL; |
| if (*root == call) { |
| *root = call->links[list].next; |
| if (*root == call) { |
| *root = NULL; |
| return 1; |
| } |
| } |
| GPR_ASSERT(*root != call); |
| call->links[list].next->links[list].prev = call->links[list].prev; |
| call->links[list].prev->links[list].next = call->links[list].next; |
| return 1; |
| } |
| |
| static void requested_call_array_destroy(requested_call_array *array) { |
| gpr_free(array->calls); |
| } |
| |
| static requested_call *requested_call_array_add(requested_call_array *array) { |
| requested_call *rc; |
| if (array->count == array->capacity) { |
| array->capacity = GPR_MAX(array->capacity + 8, array->capacity * 2); |
| array->calls = |
| gpr_realloc(array->calls, sizeof(requested_call) * array->capacity); |
| } |
| rc = &array->calls[array->count++]; |
| memset(rc, 0, sizeof(*rc)); |
| return rc; |
| } |
| |
| static void server_ref(grpc_server *server) { |
| gpr_ref(&server->internal_refcount); |
| } |
| |
| static void server_unref(grpc_server *server) { |
| registered_method *rm; |
| 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) { |
| server->registered_methods = rm->next; |
| gpr_free(rm->method); |
| gpr_free(rm->host); |
| requested_call_array_destroy(&rm->requested); |
| gpr_free(rm); |
| } |
| gpr_free(server->cqs); |
| gpr_free(server->pollsets); |
| gpr_free(server->shutdown_tags); |
| gpr_free(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(void *cd, int success) { |
| channel_data *chand = cd; |
| grpc_server *server = chand->server; |
| grpc_channel_internal_unref(chand->channel); |
| server_unref(server); |
| } |
| |
| static void destroy_channel(channel_data *chand) { |
| if (is_channel_orphaned(chand)) return; |
| GPR_ASSERT(chand->server != NULL); |
| orphan_channel(chand); |
| server_ref(chand->server); |
| grpc_iomgr_add_callback(finish_destroy_channel, chand); |
| } |
| |
| static void finish_start_new_rpc_and_unlock(grpc_server *server, |
| grpc_call_element *elem, |
| call_data **pending_root, |
| requested_call_array *array) { |
| requested_call rc; |
| call_data *calld = elem->call_data; |
| if (array->count == 0) { |
| calld->state = PENDING; |
| call_list_join(pending_root, calld, PENDING_START); |
| gpr_mu_unlock(&server->mu); |
| } else { |
| rc = array->calls[--array->count]; |
| calld->state = ACTIVATED; |
| gpr_mu_unlock(&server->mu); |
| begin_call(server, calld, &rc); |
| } |
| } |
| |
| static void start_new_rpc(grpc_call_element *elem) { |
| channel_data *chand = elem->channel_data; |
| call_data *calld = elem->call_data; |
| grpc_server *server = chand->server; |
| gpr_uint32 i; |
| gpr_uint32 hash; |
| channel_registered_method *rm; |
| |
| gpr_mu_lock(&server->mu); |
| if (chand->registered_methods && calld->path && calld->host) { |
| /* TODO(ctiller): unify these two searches */ |
| /* check for an exact match with host */ |
| hash = GRPC_MDSTR_KV_HASH(calld->host->hash, calld->path->hash); |
| 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->host != calld->host) continue; |
| if (rm->method != calld->path) continue; |
| finish_start_new_rpc_and_unlock(server, elem, |
| &rm->server_registered_method->pending, |
| &rm->server_registered_method->requested); |
| return; |
| } |
| /* check for a wildcard method definition (no host set) */ |
| hash = GRPC_MDSTR_KV_HASH(0, calld->path->hash); |
| 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->host != NULL) continue; |
| if (rm->method != calld->path) continue; |
| finish_start_new_rpc_and_unlock(server, elem, |
| &rm->server_registered_method->pending, |
| &rm->server_registered_method->requested); |
| return; |
| } |
| } |
| finish_start_new_rpc_and_unlock(server, elem, &server->lists[PENDING_START], |
| &server->requested_calls); |
| } |
| |
| static void kill_zombie(void *elem, int success) { |
| grpc_call_destroy(grpc_call_from_top_element(elem)); |
| } |
| |
| static void stream_closed(grpc_call_element *elem) { |
| call_data *calld = elem->call_data; |
| channel_data *chand = elem->channel_data; |
| gpr_mu_lock(&chand->server->mu); |
| switch (calld->state) { |
| case ACTIVATED: |
| break; |
| case PENDING: |
| call_list_remove(calld, PENDING_START); |
| /* fallthrough intended */ |
| case NOT_STARTED: |
| calld->state = ZOMBIED; |
| grpc_iomgr_add_callback(kill_zombie, elem); |
| break; |
| case ZOMBIED: |
| break; |
| } |
| gpr_mu_unlock(&chand->server->mu); |
| grpc_call_stream_closed(elem); |
| } |
| |
| static void read_closed(grpc_call_element *elem) { |
| call_data *calld = elem->call_data; |
| channel_data *chand = elem->channel_data; |
| gpr_mu_lock(&chand->server->mu); |
| switch (calld->state) { |
| case ACTIVATED: |
| case PENDING: |
| grpc_call_read_closed(elem); |
| break; |
| case NOT_STARTED: |
| calld->state = ZOMBIED; |
| grpc_iomgr_add_callback(kill_zombie, elem); |
| break; |
| case ZOMBIED: |
| break; |
| } |
| gpr_mu_unlock(&chand->server->mu); |
| } |
| |
| static void call_op(grpc_call_element *elem, grpc_call_element *from_elemn, |
| grpc_call_op *op) { |
| channel_data *chand = elem->channel_data; |
| call_data *calld = elem->call_data; |
| grpc_mdelem *md; |
| GRPC_CALL_LOG_OP(GPR_INFO, elem, op); |
| switch (op->type) { |
| case GRPC_RECV_METADATA: |
| md = op->data.metadata; |
| if (md->key == chand->path_key) { |
| calld->path = grpc_mdstr_ref(md->value); |
| grpc_mdelem_unref(md); |
| } else if (md->key == chand->authority_key) { |
| calld->host = grpc_mdstr_ref(md->value); |
| grpc_mdelem_unref(md); |
| } else { |
| grpc_call_recv_metadata(elem, md); |
| } |
| break; |
| case GRPC_RECV_END_OF_INITIAL_METADATA: |
| start_new_rpc(elem); |
| grpc_call_initial_metadata_complete(elem); |
| break; |
| case GRPC_RECV_MESSAGE: |
| grpc_call_recv_message(elem, op->data.message); |
| op->done_cb(op->user_data, GRPC_OP_OK); |
| break; |
| case GRPC_RECV_HALF_CLOSE: |
| read_closed(elem); |
| break; |
| case GRPC_RECV_FINISH: |
| stream_closed(elem); |
| break; |
| case GRPC_RECV_DEADLINE: |
| grpc_call_set_deadline(elem, op->data.deadline); |
| ((call_data *)elem->call_data)->deadline = op->data.deadline; |
| break; |
| default: |
| GPR_ASSERT(op->dir == GRPC_CALL_DOWN); |
| grpc_call_next_op(elem, op); |
| break; |
| } |
| } |
| |
| static void channel_op(grpc_channel_element *elem, |
| grpc_channel_element *from_elem, grpc_channel_op *op) { |
| channel_data *chand = elem->channel_data; |
| grpc_server *server = chand->server; |
| |
| switch (op->type) { |
| case GRPC_ACCEPT_CALL: |
| /* create a call */ |
| grpc_call_create(chand->channel, NULL, |
| op->data.accept_call.transport_server_data); |
| break; |
| case GRPC_TRANSPORT_CLOSED: |
| /* if the transport is closed for a server channel, we destroy the |
| channel */ |
| gpr_mu_lock(&server->mu); |
| server_ref(server); |
| destroy_channel(chand); |
| gpr_mu_unlock(&server->mu); |
| server_unref(server); |
| break; |
| case GRPC_TRANSPORT_GOAWAY: |
| gpr_slice_unref(op->data.goaway.message); |
| break; |
| default: |
| GPR_ASSERT(op->dir == GRPC_CALL_DOWN); |
| grpc_channel_next_op(elem, op); |
| break; |
| } |
| } |
| |
| static void finish_shutdown_channel(void *cd, int success) { |
| channel_data *chand = cd; |
| grpc_channel_op op; |
| op.type = GRPC_CHANNEL_DISCONNECT; |
| op.dir = GRPC_CALL_DOWN; |
| channel_op(grpc_channel_stack_element( |
| grpc_channel_get_channel_stack(chand->channel), 0), |
| NULL, &op); |
| grpc_channel_internal_unref(chand->channel); |
| } |
| |
| static void shutdown_channel(channel_data *chand) { |
| grpc_channel_internal_ref(chand->channel); |
| grpc_iomgr_add_callback(finish_shutdown_channel, chand); |
| } |
| |
| static void init_call_elem(grpc_call_element *elem, |
| const void *server_transport_data) { |
| call_data *calld = elem->call_data; |
| channel_data *chand = elem->channel_data; |
| memset(calld, 0, sizeof(call_data)); |
| calld->deadline = gpr_inf_future; |
| calld->call = grpc_call_from_top_element(elem); |
| |
| gpr_mu_lock(&chand->server->mu); |
| call_list_join(&chand->server->lists[ALL_CALLS], calld, ALL_CALLS); |
| gpr_mu_unlock(&chand->server->mu); |
| |
| server_ref(chand->server); |
| } |
| |
| static void destroy_call_elem(grpc_call_element *elem) { |
| channel_data *chand = elem->channel_data; |
| call_data *calld = elem->call_data; |
| size_t i, j; |
| |
| gpr_mu_lock(&chand->server->mu); |
| for (i = 0; i < CALL_LIST_COUNT; i++) { |
| call_list_remove(elem->call_data, i); |
| } |
| if (chand->server->shutdown && chand->server->lists[ALL_CALLS] == NULL) { |
| for (i = 0; i < chand->server->num_shutdown_tags; i++) { |
| for (j = 0; j < chand->server->cq_count; j++) { |
| grpc_cq_end_server_shutdown(chand->server->cqs[j], |
| chand->server->shutdown_tags[i]); |
| } |
| } |
| } |
| gpr_mu_unlock(&chand->server->mu); |
| |
| if (calld->host) { |
| grpc_mdstr_unref(calld->host); |
| } |
| if (calld->path) { |
| grpc_mdstr_unref(calld->path); |
| } |
| |
| if (calld->legacy) { |
| gpr_free(calld->legacy->initial_metadata.metadata); |
| gpr_free(calld->legacy); |
| } |
| |
| server_unref(chand->server); |
| } |
| |
| static void init_channel_elem(grpc_channel_element *elem, |
| const grpc_channel_args *args, |
| grpc_mdctx *metadata_context, int is_first, |
| int is_last) { |
| channel_data *chand = elem->channel_data; |
| GPR_ASSERT(is_first); |
| GPR_ASSERT(!is_last); |
| chand->server = NULL; |
| chand->channel = NULL; |
| chand->path_key = grpc_mdstr_from_string(metadata_context, ":path"); |
| chand->authority_key = grpc_mdstr_from_string(metadata_context, ":authority"); |
| chand->next = chand->prev = chand; |
| chand->registered_methods = NULL; |
| } |
| |
| static void destroy_channel_elem(grpc_channel_element *elem) { |
| size_t i; |
| channel_data *chand = elem->channel_data; |
| if (chand->registered_methods) { |
| for (i = 0; i < chand->registered_method_slots; i++) { |
| if (chand->registered_methods[i].method) { |
| grpc_mdstr_unref(chand->registered_methods[i].method); |
| } |
| if (chand->registered_methods[i].host) { |
| grpc_mdstr_unref(chand->registered_methods[i].host); |
| } |
| } |
| gpr_free(chand->registered_methods); |
| } |
| if (chand->server) { |
| gpr_mu_lock(&chand->server->mu); |
| chand->next->prev = chand->prev; |
| chand->prev->next = chand->next; |
| chand->next = chand->prev = chand; |
| gpr_mu_unlock(&chand->server->mu); |
| grpc_mdstr_unref(chand->path_key); |
| grpc_mdstr_unref(chand->authority_key); |
| server_unref(chand->server); |
| } |
| } |
| |
| 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", |
| }; |
| |
| static void addcq(grpc_server *server, grpc_completion_queue *cq) { |
| size_t i, n; |
| for (i = 0; i < server->cq_count; i++) { |
| if (server->cqs[i] == cq) return; |
| } |
| n = server->cq_count++; |
| server->cqs = gpr_realloc(server->cqs, |
| server->cq_count * sizeof(grpc_completion_queue *)); |
| server->cqs[n] = cq; |
| } |
| |
| grpc_server *grpc_server_create_from_filters(grpc_completion_queue *cq, |
| grpc_channel_filter **filters, |
| size_t filter_count, |
| const grpc_channel_args *args) { |
| size_t i; |
| int census_enabled = grpc_channel_args_is_census_enabled(args); |
| |
| grpc_server *server = gpr_malloc(sizeof(grpc_server)); |
| |
| GPR_ASSERT(grpc_is_initialized() && "call grpc_init()"); |
| |
| memset(server, 0, sizeof(grpc_server)); |
| if (cq) addcq(server, cq); |
| |
| gpr_mu_init(&server->mu); |
| gpr_cv_init(&server->cv); |
| |
| server->unregistered_cq = cq; |
| /* 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 filter stack is: |
| |
| server_surface_filter - for making surface API calls |
| grpc_server_census_filter (optional) - for stats collection and tracing |
| {passed in filter stack} |
| grpc_connected_channel_filter - for interfacing with transports */ |
| server->channel_filter_count = filter_count + 1 + census_enabled; |
| server->channel_filters = |
| gpr_malloc(server->channel_filter_count * sizeof(grpc_channel_filter *)); |
| server->channel_filters[0] = &server_surface_filter; |
| if (census_enabled) { |
| server->channel_filters[1] = &grpc_server_census_filter; |
| } |
| for (i = 0; i < filter_count; i++) { |
| server->channel_filters[i + 1 + census_enabled] = filters[i]; |
| } |
| |
| server->channel_args = grpc_channel_args_copy(args); |
| |
| return server; |
| } |
| |
| static int streq(const char *a, const char *b) { |
| if (a == NULL && b == NULL) return 1; |
| if (a == NULL) return 0; |
| if (b == NULL) return 0; |
| return 0 == strcmp(a, b); |
| } |
| |
| void *grpc_server_register_method(grpc_server *server, const char *method, |
| const char *host, |
| grpc_completion_queue *cq_new_rpc) { |
| registered_method *m; |
| if (!method) { |
| gpr_log(GPR_ERROR, "%s method string cannot be NULL", __FUNCTION__); |
| return NULL; |
| } |
| 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 NULL; |
| } |
| } |
| addcq(server, cq_new_rpc); |
| m = gpr_malloc(sizeof(registered_method)); |
| memset(m, 0, sizeof(*m)); |
| m->method = gpr_strdup(method); |
| m->host = gpr_strdup(host); |
| m->next = server->registered_methods; |
| m->cq = cq_new_rpc; |
| server->registered_methods = m; |
| return m; |
| } |
| |
| void grpc_server_start(grpc_server *server) { |
| listener *l; |
| size_t i; |
| |
| server->pollsets = gpr_malloc(sizeof(grpc_pollset *) * server->cq_count); |
| for (i = 0; i < server->cq_count; i++) { |
| server->pollsets[i] = grpc_cq_pollset(server->cqs[i]); |
| } |
| |
| for (l = server->listeners; l; l = l->next) { |
| l->start(server, l->arg, server->pollsets, server->cq_count); |
| } |
| } |
| |
| grpc_transport_setup_result grpc_server_setup_transport( |
| grpc_server *s, grpc_transport *transport, |
| grpc_channel_filter const **extra_filters, size_t num_extra_filters, |
| grpc_mdctx *mdctx) { |
| size_t num_filters = s->channel_filter_count + num_extra_filters + 1; |
| grpc_channel_filter const **filters = |
| gpr_malloc(sizeof(grpc_channel_filter *) * num_filters); |
| size_t i; |
| size_t num_registered_methods; |
| size_t alloc; |
| registered_method *rm; |
| channel_registered_method *crm; |
| grpc_channel *channel; |
| channel_data *chand; |
| grpc_mdstr *host; |
| grpc_mdstr *method; |
| gpr_uint32 hash; |
| gpr_uint32 slots; |
| gpr_uint32 probes; |
| gpr_uint32 max_probes = 0; |
| grpc_transport_setup_result result; |
| |
| for (i = 0; i < s->channel_filter_count; i++) { |
| filters[i] = s->channel_filters[i]; |
| } |
| for (; i < s->channel_filter_count + num_extra_filters; i++) { |
| filters[i] = extra_filters[i - s->channel_filter_count]; |
| } |
| filters[i] = &grpc_connected_channel_filter; |
| |
| for (i = 0; i < s->cq_count; i++) { |
| grpc_transport_add_to_pollset(transport, grpc_cq_pollset(s->cqs[i])); |
| } |
| |
| 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; |
| chand->server = s; |
| server_ref(s); |
| chand->channel = channel; |
| |
| 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 = gpr_malloc(alloc); |
| memset(chand->registered_methods, 0, alloc); |
| for (rm = s->registered_methods; rm; rm = rm->next) { |
| host = rm->host ? grpc_mdstr_from_string(mdctx, rm->host) : NULL; |
| 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; |
| probes++) |
| ; |
| if (probes > max_probes) max_probes = probes; |
| crm = &chand->registered_methods[(hash + probes) % slots]; |
| crm->server_registered_method = rm; |
| crm->host = host; |
| crm->method = method; |
| } |
| chand->registered_method_slots = slots; |
| chand->registered_method_max_probes = max_probes; |
| } |
| |
| result = grpc_connected_channel_bind_transport( |
| grpc_channel_get_channel_stack(channel), transport); |
| |
| gpr_mu_lock(&s->mu); |
| chand->next = &s->root_channel_data; |
| chand->prev = chand->next->prev; |
| chand->next->prev = chand->prev->next = chand; |
| gpr_mu_unlock(&s->mu); |
| |
| gpr_free(filters); |
| |
| 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; |
| requested_call_array requested_calls; |
| channel_data **channels; |
| channel_data *c; |
| size_t nchannels; |
| size_t i, j; |
| grpc_channel_op op; |
| grpc_channel_element *elem; |
| registered_method *rm; |
| |
| /* lock, and gather up some stuff to do */ |
| gpr_mu_lock(&server->mu); |
| if (have_shutdown_tag) { |
| for (i = 0; i < server->cq_count; i++) { |
| grpc_cq_begin_op(server->cqs[i], NULL, GRPC_SERVER_SHUTDOWN); |
| } |
| server->shutdown_tags = |
| gpr_realloc(server->shutdown_tags, |
| sizeof(void *) * (server->num_shutdown_tags + 1)); |
| server->shutdown_tags[server->num_shutdown_tags++] = shutdown_tag; |
| } |
| if (server->shutdown) { |
| gpr_mu_unlock(&server->mu); |
| return; |
| } |
| |
| nchannels = 0; |
| for (c = server->root_channel_data.next; c != &server->root_channel_data; |
| c = c->next) { |
| nchannels++; |
| } |
| channels = gpr_malloc(sizeof(channel_data *) * nchannels); |
| i = 0; |
| for (c = server->root_channel_data.next; c != &server->root_channel_data; |
| c = c->next) { |
| grpc_channel_internal_ref(c->channel); |
| channels[i] = c; |
| i++; |
| } |
| |
| /* collect all unregistered then registered calls */ |
| requested_calls = server->requested_calls; |
| memset(&server->requested_calls, 0, sizeof(server->requested_calls)); |
| for (rm = server->registered_methods; rm; rm = rm->next) { |
| if (requested_calls.count + rm->requested.count > |
| requested_calls.capacity) { |
| requested_calls.capacity = |
| GPR_MAX(requested_calls.count + rm->requested.count, |
| 2 * requested_calls.capacity); |
| requested_calls.calls = |
| gpr_realloc(requested_calls.calls, sizeof(*requested_calls.calls) * |
| requested_calls.capacity); |
| } |
| memcpy(requested_calls.calls + requested_calls.count, rm->requested.calls, |
| sizeof(*requested_calls.calls) * rm->requested.count); |
| requested_calls.count += rm->requested.count; |
| gpr_free(rm->requested.calls); |
| memset(&rm->requested, 0, sizeof(rm->requested)); |
| } |
| |
| server->shutdown = 1; |
| if (server->lists[ALL_CALLS] == NULL) { |
| for (i = 0; i < server->num_shutdown_tags; i++) { |
| for (j = 0; j < server->cq_count; j++) { |
| grpc_cq_end_server_shutdown(server->cqs[j], server->shutdown_tags[i]); |
| } |
| } |
| } |
| gpr_mu_unlock(&server->mu); |
| |
| for (i = 0; i < nchannels; i++) { |
| c = channels[i]; |
| elem = grpc_channel_stack_element( |
| grpc_channel_get_channel_stack(c->channel), 0); |
| |
| op.type = GRPC_CHANNEL_GOAWAY; |
| op.dir = GRPC_CALL_DOWN; |
| op.data.goaway.status = GRPC_STATUS_OK; |
| op.data.goaway.message = gpr_slice_from_copied_string("Server shutdown"); |
| elem->filter->channel_op(elem, NULL, &op); |
| |
| grpc_channel_internal_unref(c->channel); |
| } |
| gpr_free(channels); |
| |
| /* terminate all the requested calls */ |
| for (i = 0; i < requested_calls.count; i++) { |
| fail_call(server, &requested_calls.calls[i]); |
| } |
| gpr_free(requested_calls.calls); |
| |
| /* Shutdown listeners */ |
| for (l = server->listeners; l; l = l->next) { |
| l->destroy(server, l->arg); |
| } |
| } |
| |
| void grpc_server_shutdown(grpc_server *server) { |
| shutdown_internal(server, 0, NULL); |
| } |
| |
| 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); |
| grpc_server_shutdown(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); |
| } |
| gpr_mu_unlock(&server->mu); |
| |
| server_unref(server); |
| } |
| |
| void grpc_server_add_listener(grpc_server *server, void *arg, |
| void (*start)(grpc_server *server, void *arg, |
| grpc_pollset **pollsets, |
| size_t pollset_count), |
| void (*destroy)(grpc_server *server, void *arg)) { |
| listener *l = 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_server *server, |
| requested_call *rc) { |
| call_data *calld = NULL; |
| requested_call_array *requested_calls = NULL; |
| gpr_mu_lock(&server->mu); |
| if (server->shutdown) { |
| gpr_mu_unlock(&server->mu); |
| fail_call(server, rc); |
| return GRPC_CALL_OK; |
| } |
| switch (rc->type) { |
| case LEGACY_CALL: |
| case BATCH_CALL: |
| calld = |
| call_list_remove_head(&server->lists[PENDING_START], PENDING_START); |
| requested_calls = &server->requested_calls; |
| break; |
| case REGISTERED_CALL: |
| calld = call_list_remove_head( |
| &rc->data.registered.registered_method->pending, PENDING_START); |
| requested_calls = &rc->data.registered.registered_method->requested; |
| break; |
| } |
| if (calld) { |
| GPR_ASSERT(calld->state == PENDING); |
| calld->state = ACTIVATED; |
| gpr_mu_unlock(&server->mu); |
| begin_call(server, calld, rc); |
| return GRPC_CALL_OK; |
| } else { |
| *requested_call_array_add(requested_calls) = *rc; |
| gpr_mu_unlock(&server->mu); |
| 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_bind, |
| void *tag) { |
| requested_call rc; |
| grpc_cq_begin_op(server->unregistered_cq, NULL, GRPC_OP_COMPLETE); |
| rc.type = BATCH_CALL; |
| rc.tag = tag; |
| rc.data.batch.cq_bind = cq_bind; |
| rc.data.batch.call = call; |
| rc.data.batch.details = details; |
| rc.data.batch.initial_metadata = initial_metadata; |
| return queue_call_request(server, &rc); |
| } |
| |
| grpc_call_error grpc_server_request_registered_call( |
| grpc_server *server, void *rm, grpc_call **call, gpr_timespec *deadline, |
| grpc_metadata_array *initial_metadata, grpc_byte_buffer **optional_payload, |
| grpc_completion_queue *cq_bind, void *tag) { |
| requested_call rc; |
| registered_method *registered_method = rm; |
| grpc_cq_begin_op(registered_method->cq, NULL, GRPC_OP_COMPLETE); |
| rc.type = REGISTERED_CALL; |
| rc.tag = tag; |
| rc.data.registered.cq_bind = cq_bind; |
| rc.data.registered.call = call; |
| rc.data.registered.registered_method = registered_method; |
| rc.data.registered.deadline = deadline; |
| rc.data.registered.initial_metadata = initial_metadata; |
| rc.data.registered.optional_payload = optional_payload; |
| return queue_call_request(server, &rc); |
| } |
| |
| grpc_call_error grpc_server_request_call_old(grpc_server *server, |
| void *tag_new) { |
| requested_call rc; |
| grpc_cq_begin_op(server->unregistered_cq, NULL, GRPC_SERVER_RPC_NEW); |
| rc.type = LEGACY_CALL; |
| rc.tag = tag_new; |
| return queue_call_request(server, &rc); |
| } |
| |
| static void publish_legacy(grpc_call *call, grpc_op_error status, void *tag); |
| static void publish_registered_or_batch(grpc_call *call, grpc_op_error status, |
| void *tag); |
| static void publish_was_not_set(grpc_call *call, grpc_op_error status, |
| void *tag) { |
| abort(); |
| } |
| |
| static void cpstr(char **dest, size_t *capacity, grpc_mdstr *value) { |
| gpr_slice slice = value->slice; |
| size_t len = GPR_SLICE_LENGTH(slice); |
| |
| if (len + 1 > *capacity) { |
| *capacity = GPR_MAX(len + 1, *capacity * 2); |
| *dest = gpr_realloc(*dest, *capacity); |
| } |
| memcpy(*dest, grpc_mdstr_as_c_string(value), len + 1); |
| } |
| |
| static void begin_call(grpc_server *server, call_data *calld, |
| requested_call *rc) { |
| grpc_ioreq_completion_func publish = publish_was_not_set; |
| grpc_ioreq req[2]; |
| grpc_ioreq *r = req; |
| |
| /* called once initial metadata has been read by the call, but BEFORE |
| the ioreq to fetch it out of the call has been executed. |
| This means metadata related fields can be relied on in calld, but to |
| fill in the metadata array passed by the client, we need to perform |
| an ioreq op, that should complete immediately. */ |
| |
| switch (rc->type) { |
| case LEGACY_CALL: |
| calld->legacy = gpr_malloc(sizeof(legacy_data)); |
| memset(calld->legacy, 0, sizeof(legacy_data)); |
| r->op = GRPC_IOREQ_RECV_INITIAL_METADATA; |
| r->data.recv_metadata = &calld->legacy->initial_metadata; |
| r++; |
| publish = publish_legacy; |
| break; |
| case BATCH_CALL: |
| cpstr(&rc->data.batch.details->host, |
| &rc->data.batch.details->host_capacity, calld->host); |
| cpstr(&rc->data.batch.details->method, |
| &rc->data.batch.details->method_capacity, calld->path); |
| grpc_call_set_completion_queue(calld->call, rc->data.batch.cq_bind); |
| *rc->data.batch.call = calld->call; |
| r->op = GRPC_IOREQ_RECV_INITIAL_METADATA; |
| r->data.recv_metadata = rc->data.batch.initial_metadata; |
| r++; |
| calld->cq_new = server->unregistered_cq; |
| publish = publish_registered_or_batch; |
| break; |
| case REGISTERED_CALL: |
| *rc->data.registered.deadline = calld->deadline; |
| grpc_call_set_completion_queue(calld->call, rc->data.registered.cq_bind); |
| *rc->data.registered.call = calld->call; |
| r->op = GRPC_IOREQ_RECV_INITIAL_METADATA; |
| r->data.recv_metadata = rc->data.registered.initial_metadata; |
| r++; |
| if (rc->data.registered.optional_payload) { |
| r->op = GRPC_IOREQ_RECV_MESSAGE; |
| r->data.recv_message = rc->data.registered.optional_payload; |
| r++; |
| } |
| calld->cq_new = rc->data.registered.registered_method->cq; |
| publish = publish_registered_or_batch; |
| break; |
| } |
| |
| grpc_call_internal_ref(calld->call); |
| grpc_call_start_ioreq_and_call_back(calld->call, req, r - req, publish, |
| rc->tag); |
| } |
| |
| static void fail_call(grpc_server *server, requested_call *rc) { |
| switch (rc->type) { |
| case LEGACY_CALL: |
| grpc_cq_end_new_rpc(server->unregistered_cq, rc->tag, NULL, do_nothing, |
| NULL, NULL, NULL, gpr_inf_past, 0, NULL); |
| break; |
| case BATCH_CALL: |
| *rc->data.batch.call = NULL; |
| rc->data.batch.initial_metadata->count = 0; |
| grpc_cq_end_op_complete(server->unregistered_cq, rc->tag, NULL, |
| do_nothing, NULL, GRPC_OP_ERROR); |
| break; |
| case REGISTERED_CALL: |
| *rc->data.registered.call = NULL; |
| rc->data.registered.initial_metadata->count = 0; |
| grpc_cq_end_op_complete(rc->data.registered.registered_method->cq, |
| rc->tag, NULL, do_nothing, NULL, GRPC_OP_ERROR); |
| break; |
| } |
| } |
| |
| static void publish_legacy(grpc_call *call, grpc_op_error status, void *tag) { |
| grpc_call_element *elem = |
| grpc_call_stack_element(grpc_call_get_call_stack(call), 0); |
| call_data *calld = elem->call_data; |
| channel_data *chand = elem->channel_data; |
| grpc_server *server = chand->server; |
| |
| if (status == GRPC_OP_OK) { |
| grpc_cq_end_new_rpc(server->unregistered_cq, tag, call, do_nothing, NULL, |
| grpc_mdstr_as_c_string(calld->path), |
| grpc_mdstr_as_c_string(calld->host), calld->deadline, |
| calld->legacy->initial_metadata.count, |
| calld->legacy->initial_metadata.metadata); |
| } else { |
| gpr_log(GPR_ERROR, "should never reach here"); |
| abort(); |
| } |
| } |
| |
| static void publish_registered_or_batch(grpc_call *call, grpc_op_error status, |
| void *tag) { |
| grpc_call_element *elem = |
| grpc_call_stack_element(grpc_call_get_call_stack(call), 0); |
| call_data *calld = elem->call_data; |
| grpc_cq_end_op_complete(calld->cq_new, tag, call, do_nothing, NULL, status); |
| } |
| |
| const grpc_channel_args *grpc_server_get_channel_args(grpc_server *server) { |
| return server->channel_args; |
| } |