diff options
Diffstat (limited to 'src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc')
-rw-r--r-- | src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc deleted file mode 100644 index 79cb64c6c6..0000000000 --- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc +++ /dev/null @@ -1,253 +0,0 @@ -/* - * - * Copyright 2015 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 <grpc/support/port_platform.h> - -#include <string.h> - -#include <grpc/support/alloc.h> - -#include "src/core/ext/filters/client_channel/lb_policy/subchannel_list.h" -#include "src/core/lib/channel/channel_args.h" -#include "src/core/lib/debug/trace.h" -#include "src/core/lib/iomgr/closure.h" -#include "src/core/lib/iomgr/combiner.h" -#include "src/core/lib/iomgr/sockaddr_utils.h" -#include "src/core/lib/transport/connectivity_state.h" - -void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd, - const char* reason) { - if (sd->subchannel != nullptr) { - if (sd->subchannel_list->tracer->enabled()) { - gpr_log(GPR_DEBUG, - "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR - " (subchannel %p): unreffing subchannel", - sd->subchannel_list->tracer->name(), sd->subchannel_list->policy, - sd->subchannel_list, - static_cast<size_t>(sd - sd->subchannel_list->subchannels), - sd->subchannel_list->num_subchannels, sd->subchannel); - } - GRPC_SUBCHANNEL_UNREF(sd->subchannel, reason); - sd->subchannel = nullptr; - sd->connected_subchannel.reset(); - if (sd->user_data != nullptr) { - GPR_ASSERT(sd->user_data_vtable != nullptr); - sd->user_data_vtable->destroy(sd->user_data); - sd->user_data = nullptr; - } - } -} - -void grpc_lb_subchannel_data_start_connectivity_watch( - grpc_lb_subchannel_data* sd) { - if (sd->subchannel_list->tracer->enabled()) { - gpr_log( - GPR_DEBUG, - "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR - " (subchannel %p): requesting connectivity change " - "notification (from %s)", - sd->subchannel_list->tracer->name(), sd->subchannel_list->policy, - sd->subchannel_list, - static_cast<size_t>(sd - sd->subchannel_list->subchannels), - sd->subchannel_list->num_subchannels, sd->subchannel, - grpc_connectivity_state_name(sd->pending_connectivity_state_unsafe)); - } - sd->connectivity_notification_pending = true; - grpc_subchannel_notify_on_state_change( - sd->subchannel, sd->subchannel_list->policy->interested_parties(), - &sd->pending_connectivity_state_unsafe, - &sd->connectivity_changed_closure); -} - -void grpc_lb_subchannel_data_stop_connectivity_watch( - grpc_lb_subchannel_data* sd) { - if (sd->subchannel_list->tracer->enabled()) { - gpr_log(GPR_DEBUG, - "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR - " (subchannel %p): stopping connectivity watch", - sd->subchannel_list->tracer->name(), sd->subchannel_list->policy, - sd->subchannel_list, - static_cast<size_t>(sd - sd->subchannel_list->subchannels), - sd->subchannel_list->num_subchannels, sd->subchannel); - } - GPR_ASSERT(sd->connectivity_notification_pending); - sd->connectivity_notification_pending = false; -} - -grpc_lb_subchannel_list* grpc_lb_subchannel_list_create( - grpc_core::LoadBalancingPolicy* p, grpc_core::TraceFlag* tracer, - const grpc_lb_addresses* addresses, grpc_combiner* combiner, - grpc_client_channel_factory* client_channel_factory, - const grpc_channel_args& args, grpc_iomgr_cb_func connectivity_changed_cb) { - grpc_lb_subchannel_list* subchannel_list = - static_cast<grpc_lb_subchannel_list*>( - gpr_zalloc(sizeof(*subchannel_list))); - if (tracer->enabled()) { - gpr_log(GPR_DEBUG, - "[%s %p] Creating subchannel list %p for %" PRIuPTR " subchannels", - tracer->name(), p, subchannel_list, addresses->num_addresses); - } - subchannel_list->policy = p; - subchannel_list->tracer = tracer; - gpr_ref_init(&subchannel_list->refcount, 1); - subchannel_list->subchannels = static_cast<grpc_lb_subchannel_data*>( - gpr_zalloc(sizeof(grpc_lb_subchannel_data) * addresses->num_addresses)); - // We need to remove the LB addresses in order to be able to compare the - // subchannel keys of subchannels from a different batch of addresses. - static const char* keys_to_remove[] = {GRPC_ARG_SUBCHANNEL_ADDRESS, - GRPC_ARG_LB_ADDRESSES}; - // Create a subchannel for each address. - grpc_subchannel_args sc_args; - size_t subchannel_index = 0; - for (size_t i = 0; i < addresses->num_addresses; i++) { - // If there were any balancer, we would have chosen grpclb policy instead. - GPR_ASSERT(!addresses->addresses[i].is_balancer); - memset(&sc_args, 0, sizeof(grpc_subchannel_args)); - grpc_arg addr_arg = - grpc_create_subchannel_address_arg(&addresses->addresses[i].address); - grpc_channel_args* new_args = grpc_channel_args_copy_and_add_and_remove( - &args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), &addr_arg, 1); - gpr_free(addr_arg.value.string); - sc_args.args = new_args; - grpc_subchannel* subchannel = grpc_client_channel_factory_create_subchannel( - client_channel_factory, &sc_args); - grpc_channel_args_destroy(new_args); - if (subchannel == nullptr) { - // Subchannel could not be created. - if (tracer->enabled()) { - char* address_uri = - grpc_sockaddr_to_uri(&addresses->addresses[i].address); - gpr_log(GPR_DEBUG, - "[%s %p] could not create subchannel for address uri %s, " - "ignoring", - tracer->name(), subchannel_list->policy, address_uri); - gpr_free(address_uri); - } - continue; - } - if (tracer->enabled()) { - char* address_uri = - grpc_sockaddr_to_uri(&addresses->addresses[i].address); - gpr_log(GPR_DEBUG, - "[%s %p] subchannel list %p index %" PRIuPTR - ": Created subchannel %p for address uri %s", - tracer->name(), p, subchannel_list, subchannel_index, subchannel, - address_uri); - gpr_free(address_uri); - } - grpc_lb_subchannel_data* sd = - &subchannel_list->subchannels[subchannel_index++]; - sd->subchannel_list = subchannel_list; - sd->subchannel = subchannel; - GRPC_CLOSURE_INIT(&sd->connectivity_changed_closure, - connectivity_changed_cb, sd, - grpc_combiner_scheduler(combiner)); - // We assume that the current state is IDLE. If not, we'll get a - // callback telling us that. - sd->prev_connectivity_state = GRPC_CHANNEL_IDLE; - sd->curr_connectivity_state = GRPC_CHANNEL_IDLE; - sd->pending_connectivity_state_unsafe = GRPC_CHANNEL_IDLE; - sd->user_data_vtable = addresses->user_data_vtable; - if (sd->user_data_vtable != nullptr) { - sd->user_data = - sd->user_data_vtable->copy(addresses->addresses[i].user_data); - } - } - subchannel_list->num_subchannels = subchannel_index; - subchannel_list->num_idle = subchannel_index; - return subchannel_list; -} - -static void subchannel_list_destroy(grpc_lb_subchannel_list* subchannel_list) { - if (subchannel_list->tracer->enabled()) { - gpr_log(GPR_DEBUG, "[%s %p] Destroying subchannel_list %p", - subchannel_list->tracer->name(), subchannel_list->policy, - subchannel_list); - } - for (size_t i = 0; i < subchannel_list->num_subchannels; i++) { - grpc_lb_subchannel_data* sd = &subchannel_list->subchannels[i]; - grpc_lb_subchannel_data_unref_subchannel(sd, "subchannel_list_destroy"); - } - gpr_free(subchannel_list->subchannels); - gpr_free(subchannel_list); -} - -void grpc_lb_subchannel_list_ref(grpc_lb_subchannel_list* subchannel_list, - const char* reason) { - gpr_ref_non_zero(&subchannel_list->refcount); - if (subchannel_list->tracer->enabled()) { - const gpr_atm count = gpr_atm_acq_load(&subchannel_list->refcount.count); - gpr_log(GPR_DEBUG, "[%s %p] subchannel_list %p REF %lu->%lu (%s)", - subchannel_list->tracer->name(), subchannel_list->policy, - subchannel_list, static_cast<unsigned long>(count - 1), - static_cast<unsigned long>(count), reason); - } -} - -void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list, - const char* reason) { - const bool done = gpr_unref(&subchannel_list->refcount); - if (subchannel_list->tracer->enabled()) { - const gpr_atm count = gpr_atm_acq_load(&subchannel_list->refcount.count); - gpr_log(GPR_DEBUG, "[%s %p] subchannel_list %p UNREF %lu->%lu (%s)", - subchannel_list->tracer->name(), subchannel_list->policy, - subchannel_list, static_cast<unsigned long>(count + 1), - static_cast<unsigned long>(count), reason); - } - if (done) { - subchannel_list_destroy(subchannel_list); - } -} - -static void subchannel_data_cancel_connectivity_watch( - grpc_lb_subchannel_data* sd, const char* reason) { - if (sd->subchannel_list->tracer->enabled()) { - gpr_log(GPR_DEBUG, - "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR - " (subchannel %p): canceling connectivity watch (%s)", - sd->subchannel_list->tracer->name(), sd->subchannel_list->policy, - sd->subchannel_list, - static_cast<size_t>(sd - sd->subchannel_list->subchannels), - sd->subchannel_list->num_subchannels, sd->subchannel, reason); - } - grpc_subchannel_notify_on_state_change(sd->subchannel, nullptr, nullptr, - &sd->connectivity_changed_closure); -} - -void grpc_lb_subchannel_list_shutdown_and_unref( - grpc_lb_subchannel_list* subchannel_list, const char* reason) { - if (subchannel_list->tracer->enabled()) { - gpr_log(GPR_DEBUG, "[%s %p] Shutting down subchannel_list %p (%s)", - subchannel_list->tracer->name(), subchannel_list->policy, - subchannel_list, reason); - } - GPR_ASSERT(!subchannel_list->shutting_down); - subchannel_list->shutting_down = true; - for (size_t i = 0; i < subchannel_list->num_subchannels; i++) { - grpc_lb_subchannel_data* sd = &subchannel_list->subchannels[i]; - // If there's a pending notification for this subchannel, cancel it; - // the callback is responsible for unreffing the subchannel. - // Otherwise, unref the subchannel directly. - if (sd->connectivity_notification_pending) { - subchannel_data_cancel_connectivity_watch(sd, reason); - } else if (sd->subchannel != nullptr) { - grpc_lb_subchannel_data_unref_subchannel(sd, reason); - } - } - grpc_lb_subchannel_list_unref(subchannel_list, reason); -} |