diff options
Diffstat (limited to 'src/core/ext')
9 files changed, 416 insertions, 113 deletions
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c index 721ba82d8f..9acacbd92d 100644 --- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c +++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c @@ -91,11 +91,13 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, connector *c = arg; grpc_closure *notify; gpr_mu_lock(&c->mu); + grpc_error *error = GRPC_ERROR_NONE; if (c->connecting_endpoint == NULL) { memset(c->result, 0, sizeof(*c->result)); gpr_mu_unlock(&c->mu); } else if (status != GRPC_SECURITY_OK) { - gpr_log(GPR_ERROR, "Secure handshake failed with error %d.", status); + error = grpc_error_set_int(GRPC_ERROR_CREATE("Secure handshake failed"), + GRPC_ERROR_INT_SECURITY_STATUS, status); memset(c->result, 0, sizeof(*c->result)); c->connecting_endpoint = NULL; gpr_mu_unlock(&c->mu); @@ -113,7 +115,7 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, } notify = c->notify; c->notify = NULL; - grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_NONE, NULL); + grpc_exec_ctx_sched(exec_ctx, notify, error, NULL); } static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg, diff --git a/src/core/ext/transport/chttp2/transport/chttp2_plugin.c b/src/core/ext/transport/chttp2/transport/chttp2_plugin.c index bd87253ed3..7d5279b9da 100644 --- a/src/core/ext/transport/chttp2/transport/chttp2_plugin.c +++ b/src/core/ext/transport/chttp2/transport/chttp2_plugin.c @@ -36,11 +36,14 @@ #include "src/core/lib/debug/trace.h" #include "src/core/lib/transport/metadata.h" +extern int grpc_http_write_state_trace; + void grpc_chttp2_plugin_init(void) { grpc_chttp2_base64_encode_and_huffman_compress = grpc_chttp2_base64_encode_and_huffman_compress_impl; grpc_register_tracer("http", &grpc_http_trace); grpc_register_tracer("flowctl", &grpc_flowctl_trace); + grpc_register_tracer("http_write_state", &grpc_http_write_state_trace); } void grpc_chttp2_plugin_shutdown(void) {} diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c index 38e782b9b4..be8a8f8498 100644 --- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c +++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c @@ -48,6 +48,7 @@ #include "src/core/ext/transport/chttp2/transport/status_conversion.h" #include "src/core/ext/transport/chttp2/transport/timeout_encoding.h" #include "src/core/lib/http/parser.h" +#include "src/core/lib/iomgr/workqueue.h" #include "src/core/lib/profiling/timers.h" #include "src/core/lib/support/string.h" #include "src/core/lib/transport/static_metadata.h" @@ -60,9 +61,9 @@ #define DEFAULT_MAX_HEADER_LIST_SIZE (16 * 1024) #define MAX_CLIENT_STREAM_ID 0x7fffffffu - int grpc_http_trace = 0; int grpc_flowctl_trace = 0; +int grpc_http_write_state_trace = 0; #define TRANSPORT_FROM_WRITING(tw) \ ((grpc_chttp2_transport *)((char *)(tw)-offsetof(grpc_chttp2_transport, \ @@ -88,10 +89,16 @@ static const grpc_transport_vtable vtable; static void writing_action(grpc_exec_ctx *exec_ctx, void *t, grpc_error *error); static void reading_action(grpc_exec_ctx *exec_ctx, void *t, grpc_error *error); static void parsing_action(grpc_exec_ctx *exec_ctx, void *t, grpc_error *error); +static void initiate_writing(grpc_exec_ctx *exec_ctx, void *t, + grpc_error *error); + +static void start_writing(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t); +static void end_waiting_for_write(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport *t, grpc_error *error); /** Set a transport level setting, and push it to our peer */ -static void push_setting(grpc_chttp2_transport *t, grpc_chttp2_setting_id id, - uint32_t value); +static void push_setting(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, + grpc_chttp2_setting_id id, uint32_t value); /** Start disconnection chain */ static void drop_connection(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, @@ -137,7 +144,7 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global); static void incoming_byte_stream_update_flow_control( - grpc_chttp2_transport_global *transport_global, + grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global, grpc_chttp2_stream_global *stream_global, size_t max_size_hint, size_t have_already); static void incoming_byte_stream_destroy_locked(grpc_exec_ctx *exec_ctx, @@ -201,6 +208,7 @@ static void destruct_transport(grpc_exec_ctx *exec_ctx, gpr_free(t); } +/*#define REFCOUNTING_DEBUG 1*/ #ifdef REFCOUNTING_DEBUG #define REF_TRANSPORT(t, r) ref_transport(t, r, __FILE__, __LINE__) #define UNREF_TRANSPORT(cl, t, r) unref_transport(cl, t, r, __FILE__, __LINE__) @@ -231,7 +239,7 @@ static void ref_transport(grpc_chttp2_transport *t) { gpr_ref(&t->refs); } static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, const grpc_channel_args *channel_args, - grpc_endpoint *ep, uint8_t is_client) { + grpc_endpoint *ep, bool is_client) { size_t i; int j; @@ -273,6 +281,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, grpc_closure_init(&t->writing_action, writing_action, t); grpc_closure_init(&t->reading_action, reading_action, t); grpc_closure_init(&t->parsing_action, parsing_action, t); + grpc_closure_init(&t->initiate_writing, initiate_writing, t); gpr_slice_buffer_init(&t->parsing.qbuf); grpc_chttp2_goaway_parser_init(&t->parsing.goaway_parser); @@ -286,6 +295,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, gpr_slice_buffer_add( &t->global.qbuf, gpr_slice_from_copied_string(GRPC_CHTTP2_CLIENT_CONNECT_STRING)); + grpc_chttp2_initiate_write(exec_ctx, &t->global, false, "initial_write"); } /* 8 is a random stab in the dark as to a good initial size: it's small enough that it shouldn't waste memory for infrequently used connections, yet @@ -311,11 +321,12 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, /* configure http2 the way we like it */ if (is_client) { - push_setting(t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0); - push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0); + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0); + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0); } - push_setting(t, GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, DEFAULT_WINDOW); - push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, + DEFAULT_WINDOW); + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, DEFAULT_MAX_HEADER_LIST_SIZE); if (channel_args) { @@ -329,7 +340,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, gpr_log(GPR_ERROR, "%s: must be an integer", GRPC_ARG_MAX_CONCURRENT_STREAMS); } else { - push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, (uint32_t)channel_args->args[i].value.integer); } } else if (0 == strcmp(channel_args->args[i].key, @@ -368,7 +379,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, gpr_log(GPR_ERROR, "%s: must be non-negative", GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER); } else { - push_setting(t, GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE, + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE, (uint32_t)channel_args->args[i].value.integer); } } else if (0 == strcmp(channel_args->args[i].key, @@ -393,7 +404,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, gpr_log(GPR_ERROR, "%s: must be non-negative", GRPC_ARG_MAX_METADATA_SIZE); } else { - push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, + push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, (uint32_t)channel_args->args[i].value.integer); } } @@ -444,6 +455,9 @@ static void close_transport_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, grpc_error *error) { if (!t->closed) { + if (grpc_http_write_state_trace) { + gpr_log(GPR_DEBUG, "W:%p close transport", t); + } t->closed = 1; connectivity_state_set(exec_ctx, &t->global, GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error), "close_transport"); @@ -513,6 +527,7 @@ static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt, &s->global.received_trailing_metadata); grpc_chttp2_data_parser_init(&s->parsing.data_parser); gpr_slice_buffer_init(&s->writing.flow_controlled_buffer); + s->global.deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC); REF_TRANSPORT(t, "stream"); @@ -589,7 +604,8 @@ static void destroy_stream_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_incoming_metadata_buffer_destroy( &s->global.received_trailing_metadata); gpr_slice_buffer_destroy(&s->writing.flow_controlled_buffer); - GRPC_ERROR_UNREF(s->global.removal_error); + GRPC_ERROR_UNREF(s->global.read_closed_error); + GRPC_ERROR_UNREF(s->global.write_closed_error); UNREF_TRANSPORT(exec_ctx, t, "stream"); @@ -633,6 +649,36 @@ grpc_chttp2_stream_parsing *grpc_chttp2_parsing_accept_stream( * LOCK MANAGEMENT */ +static const char *write_state_name(grpc_chttp2_write_state state) { + switch (state) { + case GRPC_CHTTP2_WRITING_INACTIVE: + return "INACTIVE"; + case GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER: + return "REQUESTED[p=0]"; + case GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER: + return "REQUESTED[p=1]"; + case GRPC_CHTTP2_WRITE_SCHEDULED: + return "SCHEDULED"; + case GRPC_CHTTP2_WRITING: + return "WRITING"; + case GRPC_CHTTP2_WRITING_STALE_WITH_POLLER: + return "WRITING[p=1]"; + case GRPC_CHTTP2_WRITING_STALE_NO_POLLER: + return "WRITING[p=0]"; + } + GPR_UNREACHABLE_CODE(return "UNKNOWN"); +} + +static void set_write_state(grpc_chttp2_transport *t, + grpc_chttp2_write_state state, const char *reason) { + if (grpc_http_write_state_trace) { + gpr_log(GPR_DEBUG, "W:%p %s -> %s because %s", t, + write_state_name(t->executor.write_state), write_state_name(state), + reason); + } + t->executor.write_state = state; +} + static void finish_global_actions(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t) { grpc_chttp2_executor_action_header *hdr; @@ -641,13 +687,6 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx, GPR_TIMER_BEGIN("finish_global_actions", 0); for (;;) { - if (!t->executor.writing_active && !t->closed && - grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing)) { - t->executor.writing_active = 1; - REF_TRANSPORT(t, "writing"); - prevent_endpoint_shutdown(t); - grpc_exec_ctx_sched(exec_ctx, &t->writing_action, GRPC_ERROR_NONE, NULL); - } check_read_ops(exec_ctx, &t->global); gpr_mu_lock(&t->executor.mu); @@ -668,8 +707,28 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx, continue; } else { t->executor.global_active = false; + switch (t->executor.write_state) { + case GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER: + set_write_state(t, GRPC_CHTTP2_WRITE_SCHEDULED, "unlocking"); + REF_TRANSPORT(t, "initiate_writing"); + gpr_mu_unlock(&t->executor.mu); + grpc_exec_ctx_sched( + exec_ctx, &t->initiate_writing, GRPC_ERROR_NONE, + t->ep != NULL ? grpc_endpoint_get_workqueue(t->ep) : NULL); + break; + case GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER: + start_writing(exec_ctx, t); + gpr_mu_unlock(&t->executor.mu); + break; + case GRPC_CHTTP2_WRITING_INACTIVE: + case GRPC_CHTTP2_WRITING: + case GRPC_CHTTP2_WRITING_STALE_WITH_POLLER: + case GRPC_CHTTP2_WRITING_STALE_NO_POLLER: + case GRPC_CHTTP2_WRITE_SCHEDULED: + gpr_mu_unlock(&t->executor.mu); + break; + } } - gpr_mu_unlock(&t->executor.mu); break; } @@ -740,16 +799,118 @@ void grpc_chttp2_run_with_global_lock(grpc_exec_ctx *exec_ctx, * OUTPUT PROCESSING */ -void grpc_chttp2_become_writable(grpc_chttp2_transport_global *transport_global, - grpc_chttp2_stream_global *stream_global) { +void grpc_chttp2_initiate_write(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport_global *transport_global, + bool covered_by_poller, const char *reason) { + /* Perform state checks, and transition to a scheduled state if appropriate. + Each time we finish the global lock execution, we check if we need to + write. If we do: + - (if there is a poller surrounding the write) schedule + initiate_writing, which locks and calls initiate_writing_locked to... + - call start_writing, which verifies (under the global lock) that there + are things that need to be written by calling + grpc_chttp2_unlocking_check_writes, and if so schedules writing_action + against the current exec_ctx, to be executed OUTSIDE of the global lock + - eventually writing_action results in grpc_chttp2_terminate_writing being + called, which re-takes the global lock, updates state, checks if we need + to do *another* write immediately, and if so loops back to + start_writing. + + Current problems: + - too much lock entry/exiting + - the writing thread can become stuck indefinitely (punt through the + workqueue periodically to fix) */ + + grpc_chttp2_transport *t = TRANSPORT_FROM_GLOBAL(transport_global); + switch (t->executor.write_state) { + case GRPC_CHTTP2_WRITING_INACTIVE: + set_write_state(t, covered_by_poller + ? GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER + : GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER, + reason); + break; + case GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER: + /* nothing to do: write already requested */ + break; + case GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER: + if (covered_by_poller) { + /* upgrade to note poller is available to cover the write */ + set_write_state(t, GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER, reason); + } + break; + case GRPC_CHTTP2_WRITE_SCHEDULED: + /* nothing to do: write already scheduled */ + break; + case GRPC_CHTTP2_WRITING: + set_write_state(t, + covered_by_poller ? GRPC_CHTTP2_WRITING_STALE_WITH_POLLER + : GRPC_CHTTP2_WRITING_STALE_NO_POLLER, + reason); + break; + case GRPC_CHTTP2_WRITING_STALE_WITH_POLLER: + /* nothing to do: write already requested */ + break; + case GRPC_CHTTP2_WRITING_STALE_NO_POLLER: + if (covered_by_poller) { + /* upgrade to note poller is available to cover the write */ + set_write_state(t, GRPC_CHTTP2_WRITING_STALE_WITH_POLLER, reason); + } + break; + } +} + +static void start_writing(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t) { + GPR_ASSERT(t->executor.write_state == GRPC_CHTTP2_WRITE_SCHEDULED || + t->executor.write_state == GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER); + if (!t->closed && + grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing)) { + set_write_state(t, GRPC_CHTTP2_WRITING, "start_writing"); + REF_TRANSPORT(t, "writing"); + prevent_endpoint_shutdown(t); + grpc_exec_ctx_sched(exec_ctx, &t->writing_action, GRPC_ERROR_NONE, NULL); + } else { + if (t->closed) { + set_write_state(t, GRPC_CHTTP2_WRITING_INACTIVE, + "start_writing:transport_closed"); + } else { + set_write_state(t, GRPC_CHTTP2_WRITING_INACTIVE, + "start_writing:nothing_to_write"); + } + end_waiting_for_write(exec_ctx, t, GRPC_ERROR_CREATE("Nothing to write")); + if (t->ep && !t->endpoint_reading) { + destroy_endpoint(exec_ctx, t); + } + } +} + +static void initiate_writing_locked(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport *t, + grpc_chttp2_stream *s_unused, + void *arg_ignored) { + start_writing(exec_ctx, t); + UNREF_TRANSPORT(exec_ctx, t, "initiate_writing"); +} + +static void initiate_writing(grpc_exec_ctx *exec_ctx, void *arg, + grpc_error *error) { + grpc_chttp2_run_with_global_lock(exec_ctx, arg, NULL, initiate_writing_locked, + NULL, 0); +} + +void grpc_chttp2_become_writable(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport_global *transport_global, + grpc_chttp2_stream_global *stream_global, + bool covered_by_poller, const char *reason) { if (!TRANSPORT_FROM_GLOBAL(transport_global)->closed && grpc_chttp2_list_add_writable_stream(transport_global, stream_global)) { GRPC_CHTTP2_STREAM_REF(stream_global, "chttp2_writing"); + grpc_chttp2_initiate_write(exec_ctx, transport_global, covered_by_poller, + reason); } } -static void push_setting(grpc_chttp2_transport *t, grpc_chttp2_setting_id id, - uint32_t value) { +static void push_setting(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, + grpc_chttp2_setting_id id, uint32_t value) { const grpc_chttp2_setting_parameters *sp = &grpc_chttp2_settings_parameters[id]; uint32_t use_value = GPR_CLAMP(value, sp->min_value, sp->max_value); @@ -760,9 +921,22 @@ static void push_setting(grpc_chttp2_transport *t, grpc_chttp2_setting_id id, if (use_value != t->global.settings[GRPC_LOCAL_SETTINGS][id]) { t->global.settings[GRPC_LOCAL_SETTINGS][id] = use_value; t->global.dirtied_local_settings = 1; + grpc_chttp2_initiate_write(exec_ctx, &t->global, false, "push_setting"); } } +static void end_waiting_for_write(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport *t, grpc_error *error) { + grpc_chttp2_stream_global *stream_global; + while (grpc_chttp2_list_pop_closed_waiting_for_writing(&t->global, + &stream_global)) { + fail_pending_writes(exec_ctx, &t->global, stream_global, + GRPC_ERROR_REF(error)); + GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream_global, "finish_writes"); + } + GRPC_ERROR_UNREF(error); +} + static void terminate_writing_with_lock(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, grpc_chttp2_stream *s_ignored, @@ -777,24 +951,32 @@ static void terminate_writing_with_lock(grpc_exec_ctx *exec_ctx, grpc_chttp2_cleanup_writing(exec_ctx, &t->global, &t->writing); - grpc_chttp2_stream_global *stream_global; - while (grpc_chttp2_list_pop_closed_waiting_for_writing(&t->global, - &stream_global)) { - fail_pending_writes(exec_ctx, &t->global, stream_global, - GRPC_ERROR_REF(error)); - GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream_global, "finish_writes"); + end_waiting_for_write(exec_ctx, t, error); + + switch (t->executor.write_state) { + case GRPC_CHTTP2_WRITING_INACTIVE: + case GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER: + case GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER: + case GRPC_CHTTP2_WRITE_SCHEDULED: + GPR_UNREACHABLE_CODE(break); + case GRPC_CHTTP2_WRITING: + set_write_state(t, GRPC_CHTTP2_WRITING_INACTIVE, "terminate_writing"); + break; + case GRPC_CHTTP2_WRITING_STALE_WITH_POLLER: + set_write_state(t, GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER, + "terminate_writing"); + break; + case GRPC_CHTTP2_WRITING_STALE_NO_POLLER: + set_write_state(t, GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER, + "terminate_writing"); + break; } - /* leave the writing flag up on shutdown to prevent further writes in - unlock() - from starting */ - t->executor.writing_active = 0; if (t->ep && !t->endpoint_reading) { destroy_endpoint(exec_ctx, t); } UNREF_TRANSPORT(exec_ctx, t, "writing"); - GRPC_ERROR_UNREF(error); } void grpc_chttp2_terminate_writing(grpc_exec_ctx *exec_ctx, @@ -877,7 +1059,8 @@ static void maybe_start_some_streams( stream_global->id, STREAM_FROM_GLOBAL(stream_global)); stream_global->in_stream_map = true; transport_global->concurrent_stream_count++; - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, true, + "new_stream"); } /* cancel out streams that will never be started */ while (transport_global->next_stream_id >= MAX_CLIENT_STREAM_ID && @@ -988,6 +1171,11 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, const size_t metadata_peer_limit = transport_global->settings[GRPC_PEER_SETTINGS] [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE]; + if (transport_global->is_client) { + stream_global->deadline = + gpr_time_min(stream_global->deadline, + stream_global->send_initial_metadata->deadline); + } if (metadata_size > metadata_peer_limit) { cancel_from_api( exec_ctx, transport_global, stream_global, @@ -1012,9 +1200,11 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, maybe_start_some_streams(exec_ctx, transport_global); } else { GPR_ASSERT(stream_global->id != 0); - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + true, "op.send_initial_metadata"); } } else { + stream_global->send_trailing_metadata = NULL; grpc_chttp2_complete_closure_step( exec_ctx, transport_global, stream_global, &stream_global->send_initial_metadata_finished, @@ -1036,7 +1226,8 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, } else { stream_global->send_message = op->send_message; if (stream_global->id != 0) { - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + true, "op.send_message"); } } } @@ -1069,6 +1260,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } if (stream_global->write_closed) { + stream_global->send_trailing_metadata = NULL; grpc_chttp2_complete_closure_step( exec_ctx, transport_global, stream_global, &stream_global->send_trailing_metadata_finished, @@ -1079,7 +1271,8 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, } else if (stream_global->id != 0) { /* TODO(ctiller): check if there's flow control for any outstanding bytes before going writable */ - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + true, "op.send_trailing_metadata"); } } } @@ -1100,8 +1293,8 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, (stream_global->incoming_frames.head == NULL || stream_global->incoming_frames.head->is_tail)) { incoming_byte_stream_update_flow_control( - transport_global, stream_global, transport_global->stream_lookahead, - 0); + exec_ctx, transport_global, stream_global, + transport_global->stream_lookahead, 0); } grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } @@ -1129,7 +1322,8 @@ static void perform_stream_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt, sizeof(*op)); } -static void send_ping_locked(grpc_chttp2_transport *t, grpc_closure *on_recv) { +static void send_ping_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, + grpc_closure *on_recv) { grpc_chttp2_outstanding_ping *p = gpr_malloc(sizeof(*p)); p->next = &t->global.pings; p->prev = p->next->prev; @@ -1144,6 +1338,7 @@ static void send_ping_locked(grpc_chttp2_transport *t, grpc_closure *on_recv) { p->id[7] = (uint8_t)(t->global.ping_counter & 0xff); p->on_recv = on_recv; gpr_slice_buffer_add(&t->global.qbuf, grpc_chttp2_ping_create(0, p->id)); + grpc_chttp2_initiate_write(exec_ctx, &t->global, true, "send_ping"); } static void ack_ping_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, @@ -1203,6 +1398,7 @@ static void perform_transport_op_locked(grpc_exec_ctx *exec_ctx, close_transport = grpc_chttp2_has_streams(t) ? GRPC_ERROR_NONE : GRPC_ERROR_CREATE("GOAWAY sent"); + grpc_chttp2_initiate_write(exec_ctx, &t->global, false, "goaway_sent"); } if (op->set_accept_stream) { @@ -1220,7 +1416,7 @@ static void perform_transport_op_locked(grpc_exec_ctx *exec_ctx, } if (op->send_ping) { - send_ping_locked(t, op->send_ping); + send_ping_locked(exec_ctx, t, op->send_ping); } if (close_transport != GRPC_ERROR_NONE) { @@ -1366,7 +1562,7 @@ static void remove_stream(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, GRPC_ERROR_UNREF(error); } -static void status_codes_from_error(grpc_error *error, +static void status_codes_from_error(grpc_error *error, gpr_timespec deadline, grpc_chttp2_error_code *http2_error, grpc_status_code *grpc_status) { intptr_t ip_http; @@ -1386,8 +1582,8 @@ static void status_codes_from_error(grpc_error *error, if (have_grpc) { *grpc_status = (grpc_status_code)ip_grpc; } else if (have_http) { - *grpc_status = - grpc_chttp2_http2_error_to_grpc_status((grpc_chttp2_error_code)ip_http); + *grpc_status = grpc_chttp2_http2_error_to_grpc_status( + (grpc_chttp2_error_code)ip_http, deadline); } else { *grpc_status = GRPC_STATUS_INTERNAL; } @@ -1400,13 +1596,16 @@ static void cancel_from_api(grpc_exec_ctx *exec_ctx, if (!stream_global->read_closed || !stream_global->write_closed) { grpc_status_code grpc_status; grpc_chttp2_error_code http_error; - status_codes_from_error(due_to_error, &http_error, &grpc_status); + status_codes_from_error(due_to_error, stream_global->deadline, &http_error, + &grpc_status); if (stream_global->id != 0) { gpr_slice_buffer_add( &transport_global->qbuf, grpc_chttp2_rst_stream_create(stream_global->id, (uint32_t)http_error, &stream_global->stats.outgoing)); + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "rst_stream"); } const char *msg = @@ -1466,10 +1665,39 @@ void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, } } +static void add_error(grpc_error *error, grpc_error **refs, size_t *nrefs) { + if (error == GRPC_ERROR_NONE) return; + for (size_t i = 0; i < *nrefs; i++) { + if (error == refs[i]) { + return; + } + } + refs[*nrefs] = error; + ++*nrefs; +} + +static grpc_error *removal_error(grpc_error *extra_error, + grpc_chttp2_stream_global *stream_global) { + grpc_error *refs[3]; + size_t nrefs = 0; + add_error(stream_global->read_closed_error, refs, &nrefs); + add_error(stream_global->write_closed_error, refs, &nrefs); + add_error(extra_error, refs, &nrefs); + grpc_error *error = GRPC_ERROR_NONE; + if (nrefs > 0) { + error = GRPC_ERROR_CREATE_REFERENCING("Failed due to stream removal", refs, + nrefs); + } + GRPC_ERROR_UNREF(extra_error); + return error; +} + static void fail_pending_writes(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global, grpc_chttp2_stream_global *stream_global, grpc_error *error) { + error = removal_error(error, stream_global); + stream_global->send_message = NULL; grpc_chttp2_complete_closure_step( exec_ctx, transport_global, stream_global, &stream_global->send_initial_metadata_finished, GRPC_ERROR_REF(error)); @@ -1492,14 +1720,17 @@ void grpc_chttp2_mark_stream_closed( } grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); if (close_reads && !stream_global->read_closed) { + stream_global->read_closed_error = GRPC_ERROR_REF(error); stream_global->read_closed = true; stream_global->published_initial_metadata = true; stream_global->published_trailing_metadata = true; decrement_active_streams_locked(exec_ctx, transport_global, stream_global); } if (close_writes && !stream_global->write_closed) { + stream_global->write_closed_error = GRPC_ERROR_REF(error); stream_global->write_closed = true; - if (TRANSPORT_FROM_GLOBAL(transport_global)->executor.writing_active) { + if (TRANSPORT_FROM_GLOBAL(transport_global)->executor.write_state != + GRPC_CHTTP2_WRITING_INACTIVE) { GRPC_CHTTP2_STREAM_REF(stream_global, "finish_writes"); grpc_chttp2_list_add_closed_waiting_for_writing(transport_global, stream_global); @@ -1509,7 +1740,6 @@ void grpc_chttp2_mark_stream_closed( } } if (stream_global->read_closed && stream_global->write_closed) { - stream_global->removal_error = GRPC_ERROR_REF(error); if (stream_global->id != 0 && TRANSPORT_FROM_GLOBAL(transport_global)->executor.parsing_active) { grpc_chttp2_list_add_closed_waiting_for_parsing(transport_global, @@ -1517,7 +1747,8 @@ void grpc_chttp2_mark_stream_closed( } else { if (stream_global->id != 0) { remove_stream(exec_ctx, TRANSPORT_FROM_GLOBAL(transport_global), - stream_global->id, GRPC_ERROR_REF(error)); + stream_global->id, + removal_error(GRPC_ERROR_REF(error), stream_global)); } GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream_global, "chttp2"); } @@ -1536,7 +1767,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, uint32_t len = 0; grpc_status_code grpc_status; grpc_chttp2_error_code http_error; - status_codes_from_error(error, &http_error, &grpc_status); + status_codes_from_error(error, stream_global->deadline, &http_error, + &grpc_status); GPR_ASSERT(grpc_status >= 0 && (int)grpc_status < 100); @@ -1641,6 +1873,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global, 1, 1, error); + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "close_from_api"); } typedef struct { @@ -1670,8 +1904,14 @@ static void drop_connection(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, } /** update window from a settings change */ +typedef struct { + grpc_chttp2_transport *t; + grpc_exec_ctx *exec_ctx; +} update_global_window_args; + static void update_global_window(void *args, uint32_t id, void *stream) { - grpc_chttp2_transport *t = args; + update_global_window_args *a = args; + grpc_chttp2_transport *t = a->t; grpc_chttp2_stream *s = stream; grpc_chttp2_transport_global *transport_global = &t->global; grpc_chttp2_stream_global *stream_global = &s->global; @@ -1685,7 +1925,8 @@ static void update_global_window(void *args, uint32_t id, void *stream) { is_zero = stream_global->outgoing_window <= 0; if (was_zero && !is_zero) { - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(a->exec_ctx, transport_global, stream_global, + true, "update_global_window"); } } @@ -1794,14 +2035,19 @@ static void post_parse_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, grpc_chttp2_transport_global *transport_global = &t->global; grpc_chttp2_transport_parsing *transport_parsing = &t->parsing; /* copy parsing qbuf to global qbuf */ - gpr_slice_buffer_move_into(&t->parsing.qbuf, &t->global.qbuf); + if (t->parsing.qbuf.count > 0) { + gpr_slice_buffer_move_into(&t->parsing.qbuf, &t->global.qbuf); + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "parsing_qbuf"); + } /* merge stream lists */ grpc_chttp2_stream_map_move_into(&t->new_stream_map, &t->parsing_stream_map); transport_global->concurrent_stream_count = (uint32_t)grpc_chttp2_stream_map_size(&t->parsing_stream_map); if (transport_parsing->initial_window_update != 0) { + update_global_window_args args = {t, exec_ctx}; grpc_chttp2_stream_map_for_each(&t->parsing_stream_map, - update_global_window, t); + update_global_window, &args); transport_parsing->initial_window_update = 0; } /* handle higher level things */ @@ -1824,7 +2070,7 @@ static void post_parse_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, GPR_ASSERT(stream_global->write_closed); GPR_ASSERT(stream_global->read_closed); remove_stream(exec_ctx, t, stream_global->id, - GRPC_ERROR_REF(stream_global->removal_error)); + removal_error(GRPC_ERROR_NONE, stream_global)); GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream_global, "chttp2"); } @@ -1847,11 +2093,12 @@ static void post_reading_action_locked(grpc_exec_ctx *exec_ctx, } drop_connection(exec_ctx, t, GRPC_ERROR_REF(error)); t->endpoint_reading = 0; - if (!t->executor.writing_active && t->ep) { - grpc_endpoint_destroy(exec_ctx, t->ep); - t->ep = NULL; - /* safe as we still have a ref for read */ - UNREF_TRANSPORT(exec_ctx, t, "disconnect"); + if (grpc_http_write_state_trace) { + gpr_log(GPR_DEBUG, "R:%p -> 0 ws=%s", t, + write_state_name(t->executor.write_state)); + } + if (t->executor.write_state == GRPC_CHTTP2_WRITING_INACTIVE && t->ep) { + destroy_endpoint(exec_ctx, t); } } else if (!t->closed) { keep_reading = true; @@ -1935,7 +2182,7 @@ static void incoming_byte_stream_unref(grpc_exec_ctx *exec_ctx, } static void incoming_byte_stream_update_flow_control( - grpc_chttp2_transport_global *transport_global, + grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global, grpc_chttp2_stream_global *stream_global, size_t max_size_hint, size_t have_already) { uint32_t max_recv_bytes; @@ -1970,7 +2217,8 @@ static void incoming_byte_stream_update_flow_control( add_max_recv_bytes); grpc_chttp2_list_add_unannounced_incoming_window_available(transport_global, stream_global); - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + false, "read_incoming_stream"); } } @@ -1992,8 +2240,9 @@ static void incoming_byte_stream_next_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_stream_global *stream_global = &bs->stream->global; if (bs->is_tail) { - incoming_byte_stream_update_flow_control( - transport_global, stream_global, arg->max_size_hint, bs->slices.length); + incoming_byte_stream_update_flow_control(exec_ctx, transport_global, + stream_global, arg->max_size_hint, + bs->slices.length); } if (bs->slices.count > 0) { *arg->slice = gpr_slice_buffer_take_first(&bs->slices); @@ -2177,7 +2426,7 @@ static char *format_flowctl_context_var(const char *context, const char *var, if (context == NULL) { *scope = NULL; gpr_asprintf(&buf, "%s(%" PRId64 ")", var, val); - result = gpr_leftpad(buf, ' ', 40); + result = gpr_leftpad(buf, ' ', 60); gpr_free(buf); return result; } @@ -2190,7 +2439,7 @@ static char *format_flowctl_context_var(const char *context, const char *var, gpr_free(tmp); } gpr_asprintf(&buf, "%s.%s(%" PRId64 ")", underscore_pos + 1, var, val); - result = gpr_leftpad(buf, ' ', 40); + result = gpr_leftpad(buf, ' ', 60); gpr_free(buf); return result; } @@ -2223,7 +2472,7 @@ void grpc_chttp2_flowctl_trace(const char *file, int line, const char *phase, tmp_phase = gpr_leftpad(phase, ' ', 8); tmp_scope1 = gpr_leftpad(scope1, ' ', 11); - gpr_asprintf(&prefix, "FLOW %s: %s %s ", phase, clisvr, scope1); + gpr_asprintf(&prefix, "FLOW %s: %s %s ", tmp_phase, clisvr, scope1); gpr_free(tmp_phase); gpr_free(tmp_scope1); diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h index b5180c6fc8..e1dcf5262a 100644 --- a/src/core/ext/transport/chttp2/transport/internal.h +++ b/src/core/ext/transport/chttp2/transport/internal.h @@ -305,6 +305,22 @@ typedef struct grpc_chttp2_executor_action_header { void *arg; } grpc_chttp2_executor_action_header; +typedef enum { + /** no writing activity */ + GRPC_CHTTP2_WRITING_INACTIVE, + /** write has been requested, but not scheduled yet */ + GRPC_CHTTP2_WRITE_REQUESTED_WITH_POLLER, + GRPC_CHTTP2_WRITE_REQUESTED_NO_POLLER, + /** write has been requested and scheduled against the workqueue */ + GRPC_CHTTP2_WRITE_SCHEDULED, + /** write has been initiated after being reaped from the workqueue */ + GRPC_CHTTP2_WRITING, + /** write has been initiated, AND another write needs to be started once it's + done */ + GRPC_CHTTP2_WRITING_STALE_WITH_POLLER, + GRPC_CHTTP2_WRITING_STALE_NO_POLLER, +} grpc_chttp2_write_state; + struct grpc_chttp2_transport { grpc_transport base; /* must be first */ gpr_refcount refs; @@ -319,10 +335,10 @@ struct grpc_chttp2_transport { /** is a thread currently in the global lock */ bool global_active; - /** is a thread currently writing */ - bool writing_active; /** is a thread currently parsing */ bool parsing_active; + /** write execution state of the transport */ + grpc_chttp2_write_state write_state; grpc_chttp2_executor_action_header *pending_actions_head; grpc_chttp2_executor_action_header *pending_actions_tail; @@ -342,7 +358,8 @@ struct grpc_chttp2_transport { /** global state for reading/writing */ grpc_chttp2_transport_global global; /** state only accessible by the chain of execution that - set writing_active=1 */ + set writing_state >= GRPC_WRITING, and only by the writing closure + chain. */ grpc_chttp2_transport_writing writing; /** state only accessible by the chain of execution that set parsing_active=1 */ @@ -363,6 +380,8 @@ struct grpc_chttp2_transport { grpc_closure reading_action; /** closure to actually do parsing */ grpc_closure parsing_action; + /** closure to initiate writing */ + grpc_closure initiate_writing; /** incoming read bytes */ gpr_slice_buffer read_buffer; @@ -436,8 +455,10 @@ typedef struct { bool seen_error; bool exceeded_metadata_size; - /** the error that resulted in this stream being removed */ - grpc_error *removal_error; + /** the error that resulted in this stream being read-closed */ + grpc_error *read_closed_error; + /** the error that resulted in this stream being write-closed */ + grpc_error *write_closed_error; bool published_initial_metadata; bool published_trailing_metadata; @@ -447,6 +468,8 @@ typedef struct { grpc_chttp2_incoming_metadata_buffer received_trailing_metadata; grpc_chttp2_incoming_frame_queue incoming_frames; + + gpr_timespec deadline; } grpc_chttp2_stream_global; typedef struct { @@ -512,15 +535,20 @@ struct grpc_chttp2_stream { }; /** Transport writing call flow: - chttp2_transport.c calls grpc_chttp2_unlocking_check_writes to see if writes - are required; - if they are, chttp2_transport.c calls grpc_chttp2_perform_writes to do the - writes. - Once writes have been completed (meaning another write could potentially be - started), - grpc_chttp2_terminate_writing is called. This will call - grpc_chttp2_cleanup_writing, at which - point the write phase is complete. */ + grpc_chttp2_initiate_write() is called anywhere that we know bytes need to + go out on the wire. + If no other write has been started, a task is enqueued onto our workqueue. + When that task executes, it obtains the global lock, and gathers the data + to write. + The global lock is dropped and we do the syscall to write. + After writing, a follow-up check is made to see if another round of writing + should be performed. + + The actual call chain is documented in the implementation of this function. + */ +void grpc_chttp2_initiate_write(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport_global *transport_global, + bool covered_by_poller, const char *reason); /** Someone is unlocking the transport mutex: check to see if writes are required, and schedule them if so */ @@ -608,9 +636,8 @@ int grpc_chttp2_list_pop_check_read_ops( void grpc_chttp2_list_add_writing_stalled_by_transport( grpc_chttp2_transport_writing *transport_writing, grpc_chttp2_stream_writing *stream_writing); -void grpc_chttp2_list_flush_writing_stalled_by_transport( - grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing, - bool is_window_available); +bool grpc_chttp2_list_flush_writing_stalled_by_transport( + grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing); void grpc_chttp2_list_add_stalled_by_transport( grpc_chttp2_transport_writing *transport_writing, @@ -820,7 +847,9 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx, /** add a ref to the stream and add it to the writable list; ref will be dropped in writing.c */ -void grpc_chttp2_become_writable(grpc_chttp2_transport_global *transport_global, - grpc_chttp2_stream_global *stream_global); +void grpc_chttp2_become_writable(grpc_exec_ctx *exec_ctx, + grpc_chttp2_transport_global *transport_global, + grpc_chttp2_stream_global *stream_global, + bool covered_by_poller, const char *reason); #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INTERNAL_H */ diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c index 991d7729af..e1fc0ddee2 100644 --- a/src/core/ext/transport/chttp2/transport/parsing.c +++ b/src/core/ext/transport/chttp2/transport/parsing.c @@ -154,10 +154,8 @@ void grpc_chttp2_publish_reads( transport_parsing, outgoing_window); is_zero = transport_global->outgoing_window <= 0; if (was_zero && !is_zero) { - while (grpc_chttp2_list_pop_stalled_by_transport(transport_global, - &stream_global)) { - grpc_chttp2_become_writable(transport_global, stream_global); - } + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "new_global_flow_control"); } if (transport_parsing->incoming_window < @@ -168,6 +166,8 @@ void grpc_chttp2_publish_reads( announce_incoming_window, announce_bytes); GRPC_CHTTP2_FLOW_CREDIT_TRANSPORT("parsed", transport_parsing, incoming_window, announce_bytes); + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "global incoming window"); } /* for each stream that saw an update, fixup global state */ @@ -190,7 +190,8 @@ void grpc_chttp2_publish_reads( outgoing_window); is_zero = stream_global->outgoing_window <= 0; if (was_zero && !is_zero) { - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + false, "stream.read_flow_control"); } stream_global->max_recv_bytes -= (uint32_t)GPR_MIN( @@ -236,9 +237,10 @@ void grpc_chttp2_publish_reads( GRPC_ERROR_INT_HTTP2_ERROR, &reason); if (has_reason && reason != GRPC_CHTTP2_NO_ERROR) { grpc_status_code status_code = - has_reason ? grpc_chttp2_http2_error_to_grpc_status( - (grpc_chttp2_error_code)reason) - : GRPC_STATUS_INTERNAL; + has_reason + ? grpc_chttp2_http2_error_to_grpc_status( + (grpc_chttp2_error_code)reason, stream_global->deadline) + : GRPC_STATUS_INTERNAL; const char *status_details = grpc_error_string(stream_parsing->forced_close_error); gpr_slice slice_details = gpr_slice_from_copied_string(status_details); diff --git a/src/core/ext/transport/chttp2/transport/status_conversion.c b/src/core/ext/transport/chttp2/transport/status_conversion.c index c42fb9b3a1..5dce2f2d0c 100644 --- a/src/core/ext/transport/chttp2/transport/status_conversion.c +++ b/src/core/ext/transport/chttp2/transport/status_conversion.c @@ -39,6 +39,8 @@ int grpc_chttp2_grpc_status_to_http2_error(grpc_status_code status) { return GRPC_CHTTP2_NO_ERROR; case GRPC_STATUS_CANCELLED: return GRPC_CHTTP2_CANCEL; + case GRPC_STATUS_DEADLINE_EXCEEDED: + return GRPC_CHTTP2_CANCEL; case GRPC_STATUS_RESOURCE_EXHAUSTED: return GRPC_CHTTP2_ENHANCE_YOUR_CALM; case GRPC_STATUS_PERMISSION_DENIED: @@ -51,13 +53,17 @@ int grpc_chttp2_grpc_status_to_http2_error(grpc_status_code status) { } grpc_status_code grpc_chttp2_http2_error_to_grpc_status( - grpc_chttp2_error_code error) { + grpc_chttp2_error_code error, gpr_timespec deadline) { switch (error) { case GRPC_CHTTP2_NO_ERROR: /* should never be received */ return GRPC_STATUS_INTERNAL; case GRPC_CHTTP2_CANCEL: - return GRPC_STATUS_CANCELLED; + /* http2 cancel translates to STATUS_CANCELLED iff deadline hasn't been + * exceeded */ + return gpr_time_cmp(gpr_now(deadline.clock_type), deadline) >= 0 + ? GRPC_STATUS_DEADLINE_EXCEEDED + : GRPC_STATUS_CANCELLED; case GRPC_CHTTP2_ENHANCE_YOUR_CALM: return GRPC_STATUS_RESOURCE_EXHAUSTED; case GRPC_CHTTP2_INADEQUATE_SECURITY: diff --git a/src/core/ext/transport/chttp2/transport/status_conversion.h b/src/core/ext/transport/chttp2/transport/status_conversion.h index e7285e6fd5..953bc9f1e1 100644 --- a/src/core/ext/transport/chttp2/transport/status_conversion.h +++ b/src/core/ext/transport/chttp2/transport/status_conversion.h @@ -41,7 +41,7 @@ grpc_chttp2_error_code grpc_chttp2_grpc_status_to_http2_error( grpc_status_code status); grpc_status_code grpc_chttp2_http2_error_to_grpc_status( - grpc_chttp2_error_code error); + grpc_chttp2_error_code error, gpr_timespec deadline); /* Conversion of HTTP status codes (:status) to grpc status codes */ grpc_status_code grpc_chttp2_http2_status_to_grpc_status(int status); diff --git a/src/core/ext/transport/chttp2/transport/stream_lists.c b/src/core/ext/transport/chttp2/transport/stream_lists.c index 8f3ab00e6d..2eb5f5f632 100644 --- a/src/core/ext/transport/chttp2/transport/stream_lists.c +++ b/src/core/ext/transport/chttp2/transport/stream_lists.c @@ -329,6 +329,7 @@ void grpc_chttp2_list_add_writing_stalled_by_transport( grpc_chttp2_transport_writing *transport_writing, grpc_chttp2_stream_writing *stream_writing) { grpc_chttp2_stream *stream = STREAM_FROM_WRITING(stream_writing); + gpr_log(GPR_DEBUG, "writing stalled %d", stream->global.id); if (!stream->included[GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT]) { GRPC_CHTTP2_STREAM_REF(&stream->global, "chttp2_writing_stalled"); } @@ -336,27 +337,28 @@ void grpc_chttp2_list_add_writing_stalled_by_transport( GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT); } -void grpc_chttp2_list_flush_writing_stalled_by_transport( - grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing, - bool is_window_available) { +bool grpc_chttp2_list_flush_writing_stalled_by_transport( + grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing) { grpc_chttp2_stream *stream; + bool out = false; grpc_chttp2_transport *transport = TRANSPORT_FROM_WRITING(transport_writing); while (stream_list_pop(transport, &stream, GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT)) { - if (is_window_available) { - grpc_chttp2_become_writable(&transport->global, &stream->global); - } else { - grpc_chttp2_list_add_stalled_by_transport(transport_writing, - &stream->writing); - } + gpr_log(GPR_DEBUG, "move %d from writing stalled to just stalled", + stream->global.id); + grpc_chttp2_list_add_stalled_by_transport(transport_writing, + &stream->writing); GRPC_CHTTP2_STREAM_UNREF(exec_ctx, &stream->global, "chttp2_writing_stalled"); + out = true; } + return out; } void grpc_chttp2_list_add_stalled_by_transport( grpc_chttp2_transport_writing *transport_writing, grpc_chttp2_stream_writing *stream_writing) { + gpr_log(GPR_DEBUG, "stalled %d", stream_writing->id); stream_list_add(TRANSPORT_FROM_WRITING(transport_writing), STREAM_FROM_WRITING(stream_writing), GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT); diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c index b19f5f068d..e0d87725e9 100644 --- a/src/core/ext/transport/chttp2/transport/writing.c +++ b/src/core/ext/transport/chttp2/transport/writing.c @@ -75,9 +75,13 @@ int grpc_chttp2_unlocking_check_writes( GRPC_CHTTP2_FLOW_MOVE_TRANSPORT("write", transport_writing, outgoing_window, transport_global, outgoing_window); - bool is_window_available = transport_writing->outgoing_window > 0; - grpc_chttp2_list_flush_writing_stalled_by_transport( - exec_ctx, transport_writing, is_window_available); + if (transport_writing->outgoing_window > 0) { + while (grpc_chttp2_list_pop_stalled_by_transport(transport_global, + &stream_global)) { + grpc_chttp2_become_writable(exec_ctx, transport_global, stream_global, + false, "transport.read_flow_control"); + } + } /* for each grpc_chttp2_stream that's become writable, frame it's data (according to available window sizes) and add to the output buffer */ @@ -331,6 +335,12 @@ void grpc_chttp2_cleanup_writing( grpc_chttp2_stream_writing *stream_writing; grpc_chttp2_stream_global *stream_global; + if (grpc_chttp2_list_flush_writing_stalled_by_transport(exec_ctx, + transport_writing)) { + grpc_chttp2_initiate_write(exec_ctx, transport_global, false, + "resume_stalled_stream"); + } + while (grpc_chttp2_list_pop_written_stream( transport_global, transport_writing, &stream_global, &stream_writing)) { if (stream_writing->sent_initial_metadata) { |