Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | a93a25f | 2016-01-28 13:55:49 -0800 | [diff] [blame] | 3 | * Copyright 2015-2016, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include "src/core/channel/client_channel.h" |
| 35 | |
| 36 | #include <stdio.h> |
Craig Tiller | eb3b12e | 2015-06-26 14:42:49 -0700 | [diff] [blame] | 37 | #include <string.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 38 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 39 | #include <grpc/support/alloc.h> |
| 40 | #include <grpc/support/log.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 41 | #include <grpc/support/sync.h> |
| 42 | #include <grpc/support/useful.h> |
| 43 | |
Craig Tiller | 8910ac6 | 2015-10-08 16:49:15 -0700 | [diff] [blame] | 44 | #include "src/core/channel/channel_args.h" |
| 45 | #include "src/core/channel/connected_channel.h" |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 46 | #include "src/core/channel/subchannel_call_holder.h" |
Craig Tiller | 8910ac6 | 2015-10-08 16:49:15 -0700 | [diff] [blame] | 47 | #include "src/core/iomgr/iomgr.h" |
| 48 | #include "src/core/profiling/timers.h" |
| 49 | #include "src/core/support/string.h" |
| 50 | #include "src/core/surface/channel.h" |
| 51 | #include "src/core/transport/connectivity_state.h" |
| 52 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 53 | /* Client channel implementation */ |
| 54 | |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 55 | typedef grpc_subchannel_call_holder call_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 56 | |
Craig Tiller | 800dacb | 2015-10-06 09:10:26 -0700 | [diff] [blame] | 57 | typedef struct client_channel_channel_data { |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 58 | /** resolver for this channel */ |
| 59 | grpc_resolver *resolver; |
Craig Tiller | 20a3c35 | 2015-08-05 08:39:50 -0700 | [diff] [blame] | 60 | /** have we started resolving this channel */ |
| 61 | int started_resolving; |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 62 | |
Craig Tiller | 9d94b60 | 2015-07-01 14:23:18 -0700 | [diff] [blame] | 63 | /** mutex protecting client configuration, including all |
| 64 | variables below in this data structure */ |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 65 | gpr_mu mu_config; |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 66 | /** currently active load balancer - guarded by mu_config */ |
| 67 | grpc_lb_policy *lb_policy; |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 68 | /** incoming configuration - set by resolver.next |
| 69 | guarded by mu_config */ |
| 70 | grpc_client_config *incoming_configuration; |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 71 | /** a list of closures that are all waiting for config to come in */ |
Craig Tiller | d9ccbbf | 2015-09-22 09:30:00 -0700 | [diff] [blame] | 72 | grpc_closure_list waiting_for_config_closures; |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 73 | /** resolver callback */ |
Craig Tiller | 3382511 | 2015-09-18 07:44:19 -0700 | [diff] [blame] | 74 | grpc_closure on_config_changed; |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 75 | /** connectivity state being tracked */ |
Craig Tiller | ca3e9d3 | 2015-06-27 18:37:27 -0700 | [diff] [blame] | 76 | grpc_connectivity_state_tracker state_tracker; |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 77 | /** when an lb_policy arrives, should we try to exit idle */ |
| 78 | int exit_idle_when_lb_policy_arrives; |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 79 | /** owning stack */ |
| 80 | grpc_channel_stack *owning_stack; |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 81 | /** interested parties (owned) */ |
| 82 | grpc_pollset_set *interested_parties; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 83 | } channel_data; |
| 84 | |
Craig Tiller | d6c98df | 2015-08-18 09:33:44 -0700 | [diff] [blame] | 85 | /** We create one watcher for each new lb_policy that is returned from a |
| 86 | resolver, |
| 87 | to watch for state changes from the lb_policy. When a state change is seen, |
| 88 | we |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 89 | update the channel, and create a new watcher */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 90 | typedef struct { |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 91 | channel_data *chand; |
Craig Tiller | 3382511 | 2015-09-18 07:44:19 -0700 | [diff] [blame] | 92 | grpc_closure on_changed; |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 93 | grpc_connectivity_state state; |
| 94 | grpc_lb_policy *lb_policy; |
| 95 | } lb_policy_connectivity_watcher; |
| 96 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 97 | typedef struct { |
Craig Tiller | 3382511 | 2015-09-18 07:44:19 -0700 | [diff] [blame] | 98 | grpc_closure closure; |
Craig Tiller | eb3b12e | 2015-06-26 14:42:49 -0700 | [diff] [blame] | 99 | grpc_call_element *elem; |
| 100 | } waiting_call; |
| 101 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 102 | static char *cc_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) { |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 103 | return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data); |
Craig Tiller | eb3b12e | 2015-06-26 14:42:49 -0700 | [diff] [blame] | 104 | } |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 105 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 106 | static void cc_start_transport_stream_op(grpc_exec_ctx *exec_ctx, |
| 107 | grpc_call_element *elem, |
| 108 | grpc_transport_stream_op *op) { |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 109 | GRPC_CALL_LOG_OP(GPR_INFO, elem, op); |
| 110 | grpc_subchannel_call_holder_perform_op(exec_ctx, elem->call_data, op); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 111 | } |
| 112 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 113 | static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand, |
| 114 | grpc_lb_policy *lb_policy, |
| 115 | grpc_connectivity_state current_state); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 116 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 117 | static void on_lb_policy_state_changed_locked( |
| 118 | grpc_exec_ctx *exec_ctx, lb_policy_connectivity_watcher *w) { |
Craig Tiller | cb2609f | 2015-11-24 17:19:19 -0800 | [diff] [blame] | 119 | grpc_connectivity_state publish_state = w->state; |
Craig Tiller | 5795da7 | 2015-09-17 15:27:13 -0700 | [diff] [blame] | 120 | /* check if the notification is for a stale policy */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 121 | if (w->lb_policy != w->chand->lb_policy) return; |
Craig Tiller | 5795da7 | 2015-09-17 15:27:13 -0700 | [diff] [blame] | 122 | |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 123 | if (publish_state == GRPC_CHANNEL_FATAL_FAILURE && |
| 124 | w->chand->resolver != NULL) { |
Craig Tiller | cb2609f | 2015-11-24 17:19:19 -0800 | [diff] [blame] | 125 | publish_state = GRPC_CHANNEL_TRANSIENT_FAILURE; |
| 126 | grpc_resolver_channel_saw_error(exec_ctx, w->chand->resolver); |
Craig Tiller | f62c4d5 | 2015-12-04 07:43:07 -0800 | [diff] [blame] | 127 | GRPC_LB_POLICY_UNREF(exec_ctx, w->chand->lb_policy, "channel"); |
| 128 | w->chand->lb_policy = NULL; |
Craig Tiller | cb2609f | 2015-11-24 17:19:19 -0800 | [diff] [blame] | 129 | } |
| 130 | grpc_connectivity_state_set(exec_ctx, &w->chand->state_tracker, publish_state, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 131 | "lb_changed"); |
| 132 | if (w->state != GRPC_CHANNEL_FATAL_FAILURE) { |
| 133 | watch_lb_policy(exec_ctx, w->chand, w->lb_policy, w->state); |
| 134 | } |
Craig Tiller | 5795da7 | 2015-09-17 15:27:13 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 137 | static void on_lb_policy_state_changed(grpc_exec_ctx *exec_ctx, void *arg, |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 138 | bool iomgr_success) { |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 139 | lb_policy_connectivity_watcher *w = arg; |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 140 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 141 | gpr_mu_lock(&w->chand->mu_config); |
| 142 | on_lb_policy_state_changed_locked(exec_ctx, w); |
| 143 | gpr_mu_unlock(&w->chand->mu_config); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 144 | |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 145 | GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack, "watch_lb_policy"); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 146 | gpr_free(w); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 149 | static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand, |
| 150 | grpc_lb_policy *lb_policy, |
| 151 | grpc_connectivity_state current_state) { |
| 152 | lb_policy_connectivity_watcher *w = gpr_malloc(sizeof(*w)); |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 153 | GRPC_CHANNEL_STACK_REF(chand->owning_stack, "watch_lb_policy"); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 154 | |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 155 | w->chand = chand; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 156 | grpc_closure_init(&w->on_changed, on_lb_policy_state_changed, w); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 157 | w->state = current_state; |
| 158 | w->lb_policy = lb_policy; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 159 | grpc_lb_policy_notify_on_state_change(exec_ctx, lb_policy, &w->state, |
| 160 | &w->on_changed); |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 161 | } |
| 162 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 163 | static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg, |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 164 | bool iomgr_success) { |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 165 | channel_data *chand = arg; |
| 166 | grpc_lb_policy *lb_policy = NULL; |
| 167 | grpc_lb_policy *old_lb_policy; |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 168 | grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE; |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 169 | int exit_idle = 0; |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 170 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 171 | if (chand->incoming_configuration != NULL) { |
| 172 | lb_policy = grpc_client_config_get_lb_policy(chand->incoming_configuration); |
| 173 | if (lb_policy != NULL) { |
| 174 | GRPC_LB_POLICY_REF(lb_policy, "channel"); |
| 175 | GRPC_LB_POLICY_REF(lb_policy, "config_change"); |
| 176 | state = grpc_lb_policy_check_connectivity(exec_ctx, lb_policy); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 177 | } |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 178 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 179 | grpc_client_config_unref(exec_ctx, chand->incoming_configuration); |
| 180 | } |
| 181 | |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 182 | chand->incoming_configuration = NULL; |
| 183 | |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 184 | if (lb_policy != NULL) { |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 185 | grpc_pollset_set_add_pollset_set(exec_ctx, lb_policy->interested_parties, |
| 186 | chand->interested_parties); |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 187 | } |
| 188 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 189 | gpr_mu_lock(&chand->mu_config); |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 190 | old_lb_policy = chand->lb_policy; |
| 191 | chand->lb_policy = lb_policy; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 192 | if (lb_policy != NULL || chand->resolver == NULL /* disconnected */) { |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 193 | grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures, |
| 194 | NULL); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 195 | } |
| 196 | if (lb_policy != NULL && chand->exit_idle_when_lb_policy_arrives) { |
| 197 | GRPC_LB_POLICY_REF(lb_policy, "exit_idle"); |
| 198 | exit_idle = 1; |
| 199 | chand->exit_idle_when_lb_policy_arrives = 0; |
| 200 | } |
Craig Tiller | 9846503 | 2015-06-29 14:36:42 -0700 | [diff] [blame] | 201 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 202 | if (iomgr_success && chand->resolver) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 203 | grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, state, |
| 204 | "new_lb+resolver"); |
| 205 | if (lb_policy != NULL) { |
| 206 | watch_lb_policy(exec_ctx, chand, lb_policy, state); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 207 | } |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 208 | GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); |
Craig Tiller | 76a5c0e | 2016-03-09 09:05:30 -0800 | [diff] [blame^] | 209 | grpc_resolver_next(exec_ctx, chand->resolver, |
| 210 | &chand->incoming_configuration, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 211 | &chand->on_config_changed); |
Craig Tiller | 76a5c0e | 2016-03-09 09:05:30 -0800 | [diff] [blame^] | 212 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 213 | } else { |
Craig Tiller | 76a5c0e | 2016-03-09 09:05:30 -0800 | [diff] [blame^] | 214 | if (chand->resolver != NULL) { |
| 215 | grpc_resolver_shutdown(exec_ctx, chand->resolver); |
| 216 | GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); |
| 217 | chand->resolver = NULL; |
| 218 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 219 | grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, |
| 220 | GRPC_CHANNEL_FATAL_FAILURE, "resolver_gone"); |
| 221 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 222 | } |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 223 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 224 | if (exit_idle) { |
| 225 | grpc_lb_policy_exit_idle(exec_ctx, lb_policy); |
| 226 | GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "exit_idle"); |
| 227 | } |
Craig Tiller | 1ada6ad | 2015-07-16 16:19:14 -0700 | [diff] [blame] | 228 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 229 | if (old_lb_policy != NULL) { |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 230 | grpc_pollset_set_del_pollset_set( |
| 231 | exec_ctx, old_lb_policy->interested_parties, chand->interested_parties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 232 | GRPC_LB_POLICY_UNREF(exec_ctx, old_lb_policy, "channel"); |
| 233 | } |
Craig Tiller | 000cd8f | 2015-09-18 07:20:29 -0700 | [diff] [blame] | 234 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 235 | if (lb_policy != NULL) { |
| 236 | GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "config_change"); |
| 237 | } |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 238 | |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 239 | GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver"); |
Craig Tiller | 3f47542 | 2015-06-25 10:43:05 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 242 | static void cc_start_transport_op(grpc_exec_ctx *exec_ctx, |
| 243 | grpc_channel_element *elem, |
| 244 | grpc_transport_op *op) { |
Craig Tiller | ca3e9d3 | 2015-06-27 18:37:27 -0700 | [diff] [blame] | 245 | channel_data *chand = elem->channel_data; |
Craig Tiller | 000cd8f | 2015-09-18 07:20:29 -0700 | [diff] [blame] | 246 | |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 247 | grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL); |
Craig Tiller | ca3e9d3 | 2015-06-27 18:37:27 -0700 | [diff] [blame] | 248 | |
Craig Tiller | d7f12e3 | 2016-03-03 10:08:31 -0800 | [diff] [blame] | 249 | GPR_ASSERT(op->set_accept_stream == false); |
Craig Tiller | 28bf891 | 2015-12-07 16:07:04 -0800 | [diff] [blame] | 250 | if (op->bind_pollset != NULL) { |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 251 | grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties, |
Craig Tiller | e2c6237 | 2015-12-07 16:11:03 -0800 | [diff] [blame] | 252 | op->bind_pollset); |
Craig Tiller | 28bf891 | 2015-12-07 16:07:04 -0800 | [diff] [blame] | 253 | } |
Craig Tiller | ca3e9d3 | 2015-06-27 18:37:27 -0700 | [diff] [blame] | 254 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 255 | gpr_mu_lock(&chand->mu_config); |
| 256 | if (op->on_connectivity_state_change != NULL) { |
| 257 | grpc_connectivity_state_notify_on_state_change( |
| 258 | exec_ctx, &chand->state_tracker, op->connectivity_state, |
| 259 | op->on_connectivity_state_change); |
| 260 | op->on_connectivity_state_change = NULL; |
| 261 | op->connectivity_state = NULL; |
| 262 | } |
| 263 | |
Craig Tiller | 26dab31 | 2015-12-07 14:43:47 -0800 | [diff] [blame] | 264 | if (op->send_ping != NULL) { |
Craig Tiller | 87b71e2 | 2015-12-07 15:14:14 -0800 | [diff] [blame] | 265 | if (chand->lb_policy == NULL) { |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 266 | grpc_exec_ctx_enqueue(exec_ctx, op->send_ping, false, NULL); |
Craig Tiller | 26dab31 | 2015-12-07 14:43:47 -0800 | [diff] [blame] | 267 | } else { |
Craig Tiller | 28bf891 | 2015-12-07 16:07:04 -0800 | [diff] [blame] | 268 | grpc_lb_policy_ping_one(exec_ctx, chand->lb_policy, op->send_ping); |
Craig Tiller | 26dab31 | 2015-12-07 14:43:47 -0800 | [diff] [blame] | 269 | op->bind_pollset = NULL; |
| 270 | } |
| 271 | op->send_ping = NULL; |
| 272 | } |
| 273 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 274 | if (op->disconnect && chand->resolver != NULL) { |
| 275 | grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, |
| 276 | GRPC_CHANNEL_FATAL_FAILURE, "disconnect"); |
Craig Tiller | 76a5c0e | 2016-03-09 09:05:30 -0800 | [diff] [blame^] | 277 | grpc_resolver_shutdown(exec_ctx, chand->resolver); |
| 278 | GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 279 | chand->resolver = NULL; |
| 280 | if (chand->lb_policy != NULL) { |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 281 | grpc_pollset_set_del_pollset_set(exec_ctx, |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 282 | chand->lb_policy->interested_parties, |
| 283 | chand->interested_parties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 284 | GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel"); |
| 285 | chand->lb_policy = NULL; |
Craig Tiller | d2cc459 | 2015-07-01 07:50:47 -0700 | [diff] [blame] | 286 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 287 | } |
| 288 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | ca3e9d3 | 2015-06-27 18:37:27 -0700 | [diff] [blame] | 289 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 290 | |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 291 | typedef struct { |
| 292 | grpc_metadata_batch *initial_metadata; |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 293 | grpc_connected_subchannel **connected_subchannel; |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 294 | grpc_closure *on_ready; |
| 295 | grpc_call_element *elem; |
| 296 | grpc_closure closure; |
| 297 | } continue_picking_args; |
| 298 | |
| 299 | static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg, |
| 300 | grpc_metadata_batch *initial_metadata, |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 301 | grpc_connected_subchannel **connected_subchannel, |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 302 | grpc_closure *on_ready); |
| 303 | |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 304 | static void continue_picking(grpc_exec_ctx *exec_ctx, void *arg, bool success) { |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 305 | continue_picking_args *cpa = arg; |
| 306 | if (!success) { |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 307 | grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, false, NULL); |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 308 | } else if (cpa->connected_subchannel == NULL) { |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 309 | /* cancelled, do nothing */ |
| 310 | } else if (cc_pick_subchannel(exec_ctx, cpa->elem, cpa->initial_metadata, |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 311 | cpa->connected_subchannel, cpa->on_ready)) { |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 312 | grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, true, NULL); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 313 | } |
| 314 | gpr_free(cpa); |
| 315 | } |
| 316 | |
| 317 | static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp, |
| 318 | grpc_metadata_batch *initial_metadata, |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 319 | grpc_connected_subchannel **connected_subchannel, |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 320 | grpc_closure *on_ready) { |
| 321 | grpc_call_element *elem = elemp; |
| 322 | channel_data *chand = elem->channel_data; |
| 323 | call_data *calld = elem->call_data; |
| 324 | continue_picking_args *cpa; |
| 325 | grpc_closure *closure; |
| 326 | |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 327 | GPR_ASSERT(connected_subchannel); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 328 | |
| 329 | gpr_mu_lock(&chand->mu_config); |
| 330 | if (initial_metadata == NULL) { |
| 331 | if (chand->lb_policy != NULL) { |
Craig Tiller | ab33b48 | 2015-11-21 08:11:04 -0800 | [diff] [blame] | 332 | grpc_lb_policy_cancel_pick(exec_ctx, chand->lb_policy, |
| 333 | connected_subchannel); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 334 | } |
| 335 | for (closure = chand->waiting_for_config_closures.head; closure != NULL; |
| 336 | closure = grpc_closure_next(closure)) { |
| 337 | cpa = closure->cb_arg; |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 338 | if (cpa->connected_subchannel == connected_subchannel) { |
| 339 | cpa->connected_subchannel = NULL; |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 340 | grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, false, NULL); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 341 | } |
| 342 | } |
| 343 | gpr_mu_unlock(&chand->mu_config); |
| 344 | return 1; |
| 345 | } |
| 346 | if (chand->lb_policy != NULL) { |
Craig Tiller | 86c0f8a | 2015-12-01 20:05:40 -0800 | [diff] [blame] | 347 | grpc_lb_policy *lb_policy = chand->lb_policy; |
| 348 | int r; |
| 349 | GRPC_LB_POLICY_REF(lb_policy, "cc_pick_subchannel"); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 350 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | 86c0f8a | 2015-12-01 20:05:40 -0800 | [diff] [blame] | 351 | r = grpc_lb_policy_pick(exec_ctx, lb_policy, calld->pollset, |
| 352 | initial_metadata, connected_subchannel, on_ready); |
| 353 | GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "cc_pick_subchannel"); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 354 | return r; |
| 355 | } |
| 356 | if (chand->resolver != NULL && !chand->started_resolving) { |
| 357 | chand->started_resolving = 1; |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 358 | GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 359 | grpc_resolver_next(exec_ctx, chand->resolver, |
| 360 | &chand->incoming_configuration, |
| 361 | &chand->on_config_changed); |
| 362 | } |
| 363 | cpa = gpr_malloc(sizeof(*cpa)); |
| 364 | cpa->initial_metadata = initial_metadata; |
Craig Tiller | b5585d4 | 2015-11-17 07:18:31 -0800 | [diff] [blame] | 365 | cpa->connected_subchannel = connected_subchannel; |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 366 | cpa->on_ready = on_ready; |
| 367 | cpa->elem = elem; |
| 368 | grpc_closure_init(&cpa->closure, continue_picking, cpa); |
| 369 | grpc_closure_list_add(&chand->waiting_for_config_closures, &cpa->closure, 1); |
| 370 | gpr_mu_unlock(&chand->mu_config); |
| 371 | return 0; |
| 372 | } |
| 373 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 374 | /* Constructor for call_data */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 375 | static void init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 376 | grpc_call_element_args *args) { |
Craig Tiller | 11beb9a | 2015-11-24 10:29:32 -0800 | [diff] [blame] | 377 | grpc_subchannel_call_holder_init(elem->call_data, cc_pick_subchannel, elem, |
| 378 | args->call_stack); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | /* Destructor for call_data */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 382 | static void destroy_call_elem(grpc_exec_ctx *exec_ctx, |
| 383 | grpc_call_element *elem) { |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 384 | grpc_subchannel_call_holder_destroy(exec_ctx, elem->call_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | /* Constructor for channel_data */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 388 | static void init_channel_elem(grpc_exec_ctx *exec_ctx, |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 389 | grpc_channel_element *elem, |
| 390 | grpc_channel_element_args *args) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 391 | channel_data *chand = elem->channel_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 392 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 393 | memset(chand, 0, sizeof(*chand)); |
Craig Tiller | eb3b12e | 2015-06-26 14:42:49 -0700 | [diff] [blame] | 394 | |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 395 | GPR_ASSERT(args->is_last); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 396 | GPR_ASSERT(elem->filter == &grpc_client_channel_filter); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 397 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 398 | gpr_mu_init(&chand->mu_config); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 399 | grpc_closure_init(&chand->on_config_changed, cc_on_config_changed, chand); |
Craig Tiller | 11beb9a | 2015-11-24 10:29:32 -0800 | [diff] [blame] | 400 | chand->owning_stack = args->channel_stack; |
Craig Tiller | 9846503 | 2015-06-29 14:36:42 -0700 | [diff] [blame] | 401 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 402 | grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE, |
| 403 | "client_channel"); |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 404 | chand->interested_parties = grpc_pollset_set_create(); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* Destructor for channel_data */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 408 | static void destroy_channel_elem(grpc_exec_ctx *exec_ctx, |
| 409 | grpc_channel_element *elem) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 410 | channel_data *chand = elem->channel_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 411 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 412 | if (chand->resolver != NULL) { |
| 413 | grpc_resolver_shutdown(exec_ctx, chand->resolver); |
| 414 | GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); |
| 415 | } |
| 416 | if (chand->lb_policy != NULL) { |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 417 | grpc_pollset_set_del_pollset_set(exec_ctx, |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 418 | chand->lb_policy->interested_parties, |
| 419 | chand->interested_parties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 420 | GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel"); |
| 421 | } |
| 422 | grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker); |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 423 | grpc_pollset_set_destroy(chand->interested_parties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 424 | gpr_mu_destroy(&chand->mu_config); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 425 | } |
| 426 | |
Craig Tiller | 577c9b2 | 2015-11-02 14:11:15 -0800 | [diff] [blame] | 427 | static void cc_set_pollset(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, |
| 428 | grpc_pollset *pollset) { |
| 429 | call_data *calld = elem->call_data; |
| 430 | calld->pollset = pollset; |
| 431 | } |
| 432 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 433 | const grpc_channel_filter grpc_client_channel_filter = { |
Craig Tiller | 8141696 | 2016-02-25 20:22:11 -0800 | [diff] [blame] | 434 | cc_start_transport_stream_op, cc_start_transport_op, sizeof(call_data), |
| 435 | init_call_elem, cc_set_pollset, destroy_call_elem, sizeof(channel_data), |
| 436 | init_channel_elem, destroy_channel_elem, cc_get_peer, "client-channel", |
Craig Tiller | 87d5b19 | 2015-04-16 14:37:57 -0700 | [diff] [blame] | 437 | }; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 438 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 439 | void grpc_client_channel_set_resolver(grpc_exec_ctx *exec_ctx, |
| 440 | grpc_channel_stack *channel_stack, |
| 441 | grpc_resolver *resolver) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 442 | /* post construction initialization: set the transport setup pointer */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 443 | grpc_channel_element *elem = grpc_channel_stack_last_element(channel_stack); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 444 | channel_data *chand = elem->channel_data; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 445 | gpr_mu_lock(&chand->mu_config); |
| 446 | GPR_ASSERT(!chand->resolver); |
Craig Tiller | f5f1712 | 2015-06-25 08:47:26 -0700 | [diff] [blame] | 447 | chand->resolver = resolver; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 448 | GRPC_RESOLVER_REF(resolver, "channel"); |
| 449 | if (!grpc_closure_list_empty(chand->waiting_for_config_closures) || |
| 450 | chand->exit_idle_when_lb_policy_arrives) { |
| 451 | chand->started_resolving = 1; |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 452 | GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 453 | grpc_resolver_next(exec_ctx, resolver, &chand->incoming_configuration, |
| 454 | &chand->on_config_changed); |
| 455 | } |
| 456 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | 190d360 | 2015-02-18 09:23:38 -0800 | [diff] [blame] | 457 | } |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 458 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 459 | grpc_connectivity_state grpc_client_channel_check_connectivity_state( |
| 460 | grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect) { |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 461 | channel_data *chand = elem->channel_data; |
| 462 | grpc_connectivity_state out; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 463 | gpr_mu_lock(&chand->mu_config); |
| 464 | out = grpc_connectivity_state_check(&chand->state_tracker); |
| 465 | if (out == GRPC_CHANNEL_IDLE && try_to_connect) { |
| 466 | if (chand->lb_policy != NULL) { |
| 467 | grpc_lb_policy_exit_idle(exec_ctx, chand->lb_policy); |
| 468 | } else { |
| 469 | chand->exit_idle_when_lb_policy_arrives = 1; |
| 470 | if (!chand->started_resolving && chand->resolver != NULL) { |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 471 | GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 472 | chand->started_resolving = 1; |
| 473 | grpc_resolver_next(exec_ctx, chand->resolver, |
| 474 | &chand->incoming_configuration, |
| 475 | &chand->on_config_changed); |
| 476 | } |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 477 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 478 | } |
| 479 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 480 | return out; |
| 481 | } |
| 482 | |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 483 | typedef struct { |
| 484 | channel_data *chand; |
| 485 | grpc_pollset *pollset; |
| 486 | grpc_closure *on_complete; |
| 487 | grpc_closure my_closure; |
| 488 | } external_connectivity_watcher; |
| 489 | |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 490 | static void on_external_watch_complete(grpc_exec_ctx *exec_ctx, void *arg, |
Craig Tiller | 6c39686 | 2016-01-28 13:53:40 -0800 | [diff] [blame] | 491 | bool iomgr_success) { |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 492 | external_connectivity_watcher *w = arg; |
| 493 | grpc_closure *follow_up = w->on_complete; |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 494 | grpc_pollset_set_del_pollset(exec_ctx, w->chand->interested_parties, |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 495 | w->pollset); |
| 496 | GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack, |
| 497 | "external_connectivity_watcher"); |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 498 | gpr_free(w); |
| 499 | follow_up->cb(exec_ctx, follow_up->cb_arg, iomgr_success); |
| 500 | } |
| 501 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 502 | void grpc_client_channel_watch_connectivity_state( |
Craig Tiller | 906e3bc | 2015-11-24 07:31:31 -0800 | [diff] [blame] | 503 | grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 504 | grpc_connectivity_state *state, grpc_closure *on_complete) { |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 505 | channel_data *chand = elem->channel_data; |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 506 | external_connectivity_watcher *w = gpr_malloc(sizeof(*w)); |
| 507 | w->chand = chand; |
| 508 | w->pollset = pollset; |
| 509 | w->on_complete = on_complete; |
Craig Tiller | 69b093b | 2016-02-25 19:04:07 -0800 | [diff] [blame] | 510 | grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties, pollset); |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 511 | grpc_closure_init(&w->my_closure, on_external_watch_complete, w); |
Craig Tiller | 1d881fb | 2015-12-01 07:39:04 -0800 | [diff] [blame] | 512 | GRPC_CHANNEL_STACK_REF(w->chand->owning_stack, |
| 513 | "external_connectivity_watcher"); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 514 | gpr_mu_lock(&chand->mu_config); |
| 515 | grpc_connectivity_state_notify_on_state_change( |
Craig Tiller | 86c9958 | 2015-11-25 15:22:26 -0800 | [diff] [blame] | 516 | exec_ctx, &chand->state_tracker, state, &w->my_closure); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 517 | gpr_mu_unlock(&chand->mu_config); |
Craig Tiller | 48cb07c | 2015-07-15 16:16:15 -0700 | [diff] [blame] | 518 | } |