diff options
author | 2017-09-13 10:53:28 -0700 | |
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committer | 2017-09-13 13:34:16 -0700 | |
commit | a495220f3128c94cf2f59a258de6d0ba8f4b2871 (patch) | |
tree | f49203f6a4cd94144e08d19ddb8fa3b357edbeac /src/core/ext/filters/client_channel | |
parent | bc130daf5f78bac986cc5cdede8476896dc5f463 (diff) |
removing a completed TODO, removing forward declarations and rearranging code instead, removing _t suffixes with other recommendations
Diffstat (limited to 'src/core/ext/filters/client_channel')
-rw-r--r-- | src/core/ext/filters/client_channel/client_channel_factory.c | 2 | ||||
-rw-r--r-- | src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c | 235 |
2 files changed, 96 insertions, 141 deletions
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.c b/src/core/ext/filters/client_channel/client_channel_factory.c index a1ba31e5cf..e8aa4cda29 100644 --- a/src/core/ext/filters/client_channel/client_channel_factory.c +++ b/src/core/ext/filters/client_channel/client_channel_factory.c @@ -48,8 +48,6 @@ static void* factory_arg_copy(void* factory) { } static void factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* factory) { - // TODO(roth): Remove local exec_ctx when - // https://github.com/grpc/grpc/pull/8705 is merged. grpc_client_channel_factory_unref(exec_ctx, (grpc_client_channel_factory*)factory); } diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c index df4a00406e..8bc6095712 100644 --- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c +++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c @@ -287,48 +287,6 @@ static void add_pending_ping(pending_ping **root, grpc_closure *notify) { */ typedef struct rr_connectivity_data rr_connectivity_data; -/* Forward declare functions referred in glb_lb_policy_vtable */ -static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol); -static void glb_shutdown_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol); -static int glb_pick_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, - const grpc_lb_policy_pick_args *pick_args, - grpc_connected_subchannel **target, - grpc_call_context_element *context, void **user_data, - grpc_closure *on_complete); -static void glb_cancel_pick_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, - grpc_connected_subchannel **target, - grpc_error *error); -static void glb_cancel_picks_locked(grpc_exec_ctx *exec_ctx, - grpc_lb_policy *pol, - uint32_t initial_metadata_flags_mask, - uint32_t initial_metadata_flags_eq, - grpc_error *error); -static void glb_ping_one_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, - grpc_closure *closure); -static void glb_exit_idle_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol); -static grpc_connectivity_state glb_check_connectivity_locked( - grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, - grpc_error **connectivity_error); -static void glb_notify_on_state_change_locked(grpc_exec_ctx *exec_ctx, - grpc_lb_policy *pol, - grpc_connectivity_state *current, - grpc_closure *notify); -static void glb_update_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy, - const grpc_lb_policy_args *args); - -/* Code wiring the policy with the rest of the core */ -static const grpc_lb_policy_vtable glb_lb_policy_vtable = { - glb_destroy, - glb_shutdown_locked, - glb_pick_locked, - glb_cancel_pick_locked, - glb_cancel_picks_locked, - glb_ping_one_locked, - glb_exit_idle_locked, - glb_check_connectivity_locked, - glb_notify_on_state_change_locked, - glb_update_locked}; - typedef struct glb_lb_policy { /** base policy: must be first */ grpc_lb_policy base; @@ -1011,92 +969,6 @@ static grpc_channel_args *build_lb_channel_args( static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error); -static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx, - grpc_lb_policy_factory *factory, - grpc_lb_policy_args *args) { - /* Count the number of gRPC-LB addresses. There must be at least one. */ - const grpc_arg *arg = - grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES); - if (arg == NULL || arg->type != GRPC_ARG_POINTER) { - return NULL; - } - grpc_lb_addresses *addresses = (grpc_lb_addresses *)arg->value.pointer.p; - size_t num_grpclb_addrs = 0; - for (size_t i = 0; i < addresses->num_addresses; ++i) { - if (addresses->addresses[i].is_balancer) ++num_grpclb_addrs; - } - if (num_grpclb_addrs == 0) return NULL; - - glb_lb_policy *glb_policy = (glb_lb_policy *)gpr_zalloc(sizeof(*glb_policy)); - - /* Get server name. */ - arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI); - GPR_ASSERT(arg != NULL); - GPR_ASSERT(arg->type == GRPC_ARG_STRING); - grpc_uri *uri = grpc_uri_parse(exec_ctx, arg->value.string, true); - GPR_ASSERT(uri->path[0] != '\0'); - glb_policy->server_name = - gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path); - if (GRPC_TRACER_ON(grpc_lb_glb_trace)) { - gpr_log(GPR_INFO, "Will use '%s' as the server name for LB request.", - glb_policy->server_name); - } - grpc_uri_destroy(uri); - - glb_policy->cc_factory = args->client_channel_factory; - GPR_ASSERT(glb_policy->cc_factory != NULL); - - arg = grpc_channel_args_find(args->args, GRPC_ARG_GRPCLB_CALL_TIMEOUT_MS); - glb_policy->lb_call_timeout_ms = - grpc_channel_arg_get_integer(arg, (grpc_integer_options){0, 0, INT_MAX}); - - arg = grpc_channel_args_find(args->args, GRPC_ARG_GRPCLB_FALLBACK_TIMEOUT_MS); - glb_policy->lb_fallback_timeout_ms = grpc_channel_arg_get_integer( - arg, (grpc_integer_options){GRPC_GRPCLB_DEFAULT_FALLBACK_TIMEOUT_MS, 0, - INT_MAX}); - - // Make sure that GRPC_ARG_LB_POLICY_NAME is set in channel args, - // since we use this to trigger the client_load_reporting filter. - grpc_arg new_arg = - grpc_channel_arg_string_create(GRPC_ARG_LB_POLICY_NAME, "grpclb"); - static const char *args_to_remove[] = {GRPC_ARG_LB_POLICY_NAME}; - glb_policy->args = grpc_channel_args_copy_and_add_and_remove( - args->args, args_to_remove, GPR_ARRAY_SIZE(args_to_remove), &new_arg, 1); - - /* Extract the backend addresses (may be empty) from the resolver for - * fallback. */ - glb_policy->fallback_backend_addresses = - extract_backend_addresses_locked(exec_ctx, addresses); - - /* Create a client channel over them to communicate with a LB service */ - glb_policy->response_generator = - grpc_fake_resolver_response_generator_create(); - grpc_channel_args *lb_channel_args = build_lb_channel_args( - exec_ctx, addresses, glb_policy->response_generator, args->args); - char *uri_str; - gpr_asprintf(&uri_str, "fake:///%s", glb_policy->server_name); - glb_policy->lb_channel = grpc_lb_policy_grpclb_create_lb_channel( - exec_ctx, uri_str, args->client_channel_factory, lb_channel_args); - - /* Propagate initial resolution */ - grpc_fake_resolver_response_generator_set_response( - exec_ctx, glb_policy->response_generator, lb_channel_args); - grpc_channel_args_destroy(exec_ctx, lb_channel_args); - gpr_free(uri_str); - if (glb_policy->lb_channel == NULL) { - gpr_free((void *)glb_policy->server_name); - grpc_channel_args_destroy(exec_ctx, glb_policy->args); - gpr_free(glb_policy); - return NULL; - } - GRPC_CLOSURE_INIT(&glb_policy->lb_channel_on_connectivity_changed, - glb_lb_channel_on_connectivity_changed_cb, glb_policy, - grpc_combiner_scheduler(args->combiner)); - grpc_lb_policy_init(&glb_policy->base, &glb_lb_policy_vtable, args->combiner); - grpc_connectivity_state_init(&glb_policy->state_tracker, GRPC_CHANNEL_IDLE, - "grpclb"); - return &glb_policy->base; -} static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) { glb_lb_policy *glb_policy = (glb_lb_policy *)pol; @@ -1936,17 +1808,6 @@ static void glb_update_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy, &glb_policy->lb_channel_connectivity, &glb_policy->lb_channel_on_connectivity_changed, NULL); } - - // Propagate update to fallback_backend_addresses if a non-empty serverlist - // hasn't been received from the balancer. - if (glb_policy->serverlist == NULL) { - grpc_lb_addresses_destroy(exec_ctx, glb_policy->fallback_backend_addresses); - glb_policy->fallback_backend_addresses = - extract_backend_addresses_locked(exec_ctx, addresses); - if (glb_policy->rr_policy != NULL) { - rr_handover_locked(exec_ctx, glb_policy); - } - } } // Invoked as part of the update process. It continues watching the LB channel @@ -2013,6 +1874,102 @@ static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx *exec_ctx, } } +/* Code wiring the policy with the rest of the core */ +static const grpc_lb_policy_vtable glb_lb_policy_vtable = { + glb_destroy, + glb_shutdown_locked, + glb_pick_locked, + glb_cancel_pick_locked, + glb_cancel_picks_locked, + glb_ping_one_locked, + glb_exit_idle_locked, + glb_check_connectivity_locked, + glb_notify_on_state_change_locked, + glb_update_locked}; + +static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx, + grpc_lb_policy_factory *factory, + grpc_lb_policy_args *args) { + /* Count the number of gRPC-LB addresses. There must be at least one. + * TODO(roth): For now, we ignore non-balancer addresses, but in the + * future, we may change the behavior such that we fall back to using + * the non-balancer addresses if we cannot reach any balancers. In the + * fallback case, we should use the LB policy indicated by + * GRPC_ARG_LB_POLICY_NAME (although if that specifies grpclb or is + * unset, we should default to pick_first). */ + const grpc_arg *arg = + grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES); + if (arg == NULL || arg->type != GRPC_ARG_POINTER) { + return NULL; + } + grpc_lb_addresses *addresses = (grpc_lb_addresses *)arg->value.pointer.p; + size_t num_grpclb_addrs = 0; + for (size_t i = 0; i < addresses->num_addresses; ++i) { + if (addresses->addresses[i].is_balancer) ++num_grpclb_addrs; + } + if (num_grpclb_addrs == 0) return NULL; + + glb_lb_policy *glb_policy = (glb_lb_policy *)gpr_zalloc(sizeof(*glb_policy)); + + /* Get server name. */ + arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI); + GPR_ASSERT(arg != NULL); + GPR_ASSERT(arg->type == GRPC_ARG_STRING); + grpc_uri *uri = grpc_uri_parse(exec_ctx, arg->value.string, true); + GPR_ASSERT(uri->path[0] != '\0'); + glb_policy->server_name = + gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path); + if (GRPC_TRACER_ON(grpc_lb_glb_trace)) { + gpr_log(GPR_INFO, "Will use '%s' as the server name for LB request.", + glb_policy->server_name); + } + grpc_uri_destroy(uri); + + glb_policy->cc_factory = args->client_channel_factory; + GPR_ASSERT(glb_policy->cc_factory != NULL); + + arg = grpc_channel_args_find(args->args, GRPC_ARG_GRPCLB_CALL_TIMEOUT_MS); + glb_policy->lb_call_timeout_ms = + grpc_channel_arg_get_integer(arg, (grpc_integer_options){0, 0, INT_MAX}); + + // Make sure that GRPC_ARG_LB_POLICY_NAME is set in channel args, + // since we use this to trigger the client_load_reporting filter. + grpc_arg new_arg = + grpc_channel_arg_string_create(GRPC_ARG_LB_POLICY_NAME, "grpclb"); + static const char *args_to_remove[] = {GRPC_ARG_LB_POLICY_NAME}; + glb_policy->args = grpc_channel_args_copy_and_add_and_remove( + args->args, args_to_remove, GPR_ARRAY_SIZE(args_to_remove), &new_arg, 1); + + /* Create a client channel over them to communicate with a LB service */ + glb_policy->response_generator = + grpc_fake_resolver_response_generator_create(); + grpc_channel_args *lb_channel_args = build_lb_channel_args( + exec_ctx, addresses, glb_policy->response_generator, args->args); + char *uri_str; + gpr_asprintf(&uri_str, "fake:///%s", glb_policy->server_name); + glb_policy->lb_channel = grpc_lb_policy_grpclb_create_lb_channel( + exec_ctx, uri_str, args->client_channel_factory, lb_channel_args); + + /* Propagate initial resolution */ + grpc_fake_resolver_response_generator_set_response( + exec_ctx, glb_policy->response_generator, lb_channel_args); + grpc_channel_args_destroy(exec_ctx, lb_channel_args); + gpr_free(uri_str); + if (glb_policy->lb_channel == NULL) { + gpr_free((void *)glb_policy->server_name); + grpc_channel_args_destroy(exec_ctx, glb_policy->args); + gpr_free(glb_policy); + return NULL; + } + GRPC_CLOSURE_INIT(&glb_policy->lb_channel_on_connectivity_changed, + glb_lb_channel_on_connectivity_changed_cb, glb_policy, + grpc_combiner_scheduler(args->combiner)); + grpc_lb_policy_init(&glb_policy->base, &glb_lb_policy_vtable, args->combiner); + grpc_connectivity_state_init(&glb_policy->state_tracker, GRPC_CHANNEL_IDLE, + "grpclb"); + return &glb_policy->base; +} + static void glb_factory_ref(grpc_lb_policy_factory *factory) {} static void glb_factory_unref(grpc_lb_policy_factory *factory) {} |