mirror of https://github.com/grpc/grpc.git
Fix retry code to hold refs to send_initial_metadata slices (#27205)
* add test proving that we fail to take refs to send_initial_metadart payload * fix grpc_slice_from_copied_string() to take refs and grpc_metadata_batch_copy() to copy the mdelems when necessary * fix criteria used to determine if mdelem is reffable * add support for inline slices * fix sanityreviewable/pr27175/r3
Mark D. Roth
3 years ago
committed by
GitHub
parent
2f838fd3b1
commit
d0cbf169bc
11 changed files with 417 additions and 4 deletions
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/*
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* |
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* Copyright 2017 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include "test/core/end2end/end2end_tests.h" |
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#include <stdio.h> |
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#include <string.h> |
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#include <grpc/byte_buffer.h> |
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#include <grpc/grpc.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/string_util.h> |
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#include <grpc/support/time.h> |
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#include "src/core/lib/channel/channel_args.h" |
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#include "src/core/lib/gpr/string.h" |
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#include "src/core/lib/gpr/useful.h" |
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#include "src/core/lib/iomgr/exec_ctx.h" |
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#include "src/core/lib/transport/static_metadata.h" |
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#include "test/core/end2end/cq_verifier.h" |
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#include "test/core/end2end/tests/cancel_test_helpers.h" |
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static void* tag(intptr_t t) { return reinterpret_cast<void*>(t); } |
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static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config, |
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const char* test_name, |
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grpc_channel_args* client_args, |
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grpc_channel_args* server_args) { |
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grpc_end2end_test_fixture f; |
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gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name); |
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f = config.create_fixture(client_args, server_args); |
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config.init_server(&f, server_args); |
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config.init_client(&f, client_args); |
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return f; |
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} |
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static gpr_timespec n_seconds_from_now(int n) { |
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return grpc_timeout_seconds_to_deadline(n); |
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} |
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static gpr_timespec five_seconds_from_now(void) { |
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return n_seconds_from_now(5); |
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} |
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static void drain_cq(grpc_completion_queue* cq) { |
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grpc_event ev; |
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do { |
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ev = grpc_completion_queue_next(cq, five_seconds_from_now(), nullptr); |
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} while (ev.type != GRPC_QUEUE_SHUTDOWN); |
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} |
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static void shutdown_server(grpc_end2end_test_fixture* f) { |
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if (!f->server) return; |
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grpc_server_shutdown_and_notify(f->server, f->shutdown_cq, tag(1000)); |
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GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(1000), |
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grpc_timeout_seconds_to_deadline(5), |
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nullptr) |
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.type == GRPC_OP_COMPLETE); |
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grpc_server_destroy(f->server); |
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f->server = nullptr; |
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} |
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static void shutdown_client(grpc_end2end_test_fixture* f) { |
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if (!f->client) return; |
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grpc_channel_destroy(f->client); |
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f->client = nullptr; |
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} |
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static void end_test(grpc_end2end_test_fixture* f) { |
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shutdown_server(f); |
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shutdown_client(f); |
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grpc_completion_queue_shutdown(f->cq); |
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drain_cq(f->cq); |
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grpc_completion_queue_destroy(f->cq); |
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grpc_completion_queue_destroy(f->shutdown_cq); |
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} |
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// Tests that we hold refs to send_initial_metadata payload while
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// cached, even after the caller has released its refs:
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// - 2 retries allowed for ABORTED status
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// - first attempt returns ABORTED
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// - second attempt returns OK
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static void test_retry_send_initial_metadata_refs( |
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grpc_end2end_test_config config) { |
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grpc_call* c; |
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grpc_call* s; |
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grpc_op ops[6]; |
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grpc_op* op; |
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grpc_metadata_array client_send_initial_metadata; |
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grpc_metadata_array initial_metadata_recv; |
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grpc_metadata_array trailing_metadata_recv; |
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grpc_metadata_array request_metadata_recv; |
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grpc_call_details call_details; |
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grpc_slice request_payload_slice = grpc_slice_from_static_string("foo"); |
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grpc_slice response_payload_slice = grpc_slice_from_static_string("bar"); |
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grpc_byte_buffer* request_payload = |
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grpc_raw_byte_buffer_create(&request_payload_slice, 1); |
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grpc_byte_buffer* response_payload = |
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grpc_raw_byte_buffer_create(&response_payload_slice, 1); |
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grpc_byte_buffer* request_payload_recv = nullptr; |
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grpc_byte_buffer* response_payload_recv = nullptr; |
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grpc_status_code status; |
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grpc_call_error error; |
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grpc_slice details; |
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int was_cancelled = 2; |
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char* peer; |
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grpc_arg args[] = { |
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grpc_channel_arg_string_create( |
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const_cast<char*>(GRPC_ARG_SERVICE_CONFIG), |
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const_cast<char*>( |
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"{\n" |
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" \"methodConfig\": [ {\n" |
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" \"name\": [\n" |
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" { \"service\": \"service\", \"method\": \"method\" }\n" |
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" ],\n" |
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" \"retryPolicy\": {\n" |
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" \"maxAttempts\": 3,\n" |
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" \"initialBackoff\": \"1s\",\n" |
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" \"maxBackoff\": \"120s\",\n" |
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" \"backoffMultiplier\": 1.6,\n" |
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" \"retryableStatusCodes\": [ \"ABORTED\" ]\n" |
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" }\n" |
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" } ]\n" |
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"}")), |
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}; |
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grpc_channel_args client_args = {GPR_ARRAY_SIZE(args), args}; |
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grpc_end2end_test_fixture f = begin_test( |
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config, "retry_send_initial_metadata_refs", &client_args, nullptr); |
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cq_verifier* cqv = cq_verifier_create(f.cq); |
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gpr_timespec deadline = five_seconds_from_now(); |
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c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq, |
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grpc_slice_from_static_string("/service/method"), |
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nullptr, deadline, nullptr); |
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GPR_ASSERT(c); |
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peer = grpc_call_get_peer(c); |
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GPR_ASSERT(peer != nullptr); |
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gpr_log(GPR_DEBUG, "client_peer_before_call=%s", peer); |
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gpr_free(peer); |
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grpc_metadata_array_init(&client_send_initial_metadata); |
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client_send_initial_metadata.count = 2; |
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client_send_initial_metadata.metadata = static_cast<grpc_metadata*>( |
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gpr_malloc(client_send_initial_metadata.count * sizeof(grpc_metadata))); |
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// First element is short enough for slices to be inlined.
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client_send_initial_metadata.metadata[0].key = |
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grpc_slice_from_copied_string(std::string("foo").c_str()); |
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client_send_initial_metadata.metadata[0].value = |
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grpc_slice_from_copied_string(std::string("bar").c_str()); |
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// Second element requires slice allocation.
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client_send_initial_metadata.metadata[1].key = grpc_slice_from_copied_string( |
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std::string(GRPC_SLICE_INLINED_SIZE + 1, 'x').c_str()); |
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client_send_initial_metadata.metadata[1].value = |
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grpc_slice_from_copied_string( |
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std::string(GRPC_SLICE_INLINED_SIZE + 1, 'y').c_str()); |
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grpc_metadata_array_init(&initial_metadata_recv); |
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grpc_metadata_array_init(&trailing_metadata_recv); |
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grpc_metadata_array_init(&request_metadata_recv); |
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grpc_call_details_init(&call_details); |
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grpc_slice status_details = grpc_slice_from_static_string("xyz"); |
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memset(ops, 0, sizeof(ops)); |
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op = ops; |
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op->op = GRPC_OP_SEND_INITIAL_METADATA; |
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op->data.send_initial_metadata.count = client_send_initial_metadata.count; |
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op->data.send_initial_metadata.metadata = |
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client_send_initial_metadata.metadata; |
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op++; |
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op->op = GRPC_OP_SEND_MESSAGE; |
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op->data.send_message.send_message = request_payload; |
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op++; |
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op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT; |
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op++; |
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error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), |
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nullptr); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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CQ_EXPECT_COMPLETION(cqv, tag(1), true); |
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cq_verify(cqv); |
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for (size_t i = 0; i < client_send_initial_metadata.count; ++i) { |
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grpc_slice_unref(client_send_initial_metadata.metadata[i].key); |
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grpc_slice_unref(client_send_initial_metadata.metadata[i].value); |
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} |
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grpc_metadata_array_destroy(&client_send_initial_metadata); |
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memset(ops, 0, sizeof(ops)); |
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op = ops; |
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op->op = GRPC_OP_RECV_MESSAGE; |
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op->data.recv_message.recv_message = &response_payload_recv; |
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op++; |
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op->op = GRPC_OP_RECV_INITIAL_METADATA; |
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op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv; |
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op++; |
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op->op = GRPC_OP_RECV_STATUS_ON_CLIENT; |
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op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv; |
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op->data.recv_status_on_client.status = &status; |
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op->data.recv_status_on_client.status_details = &details; |
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op++; |
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error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), |
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nullptr); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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error = |
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grpc_server_request_call(f.server, &s, &call_details, |
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&request_metadata_recv, f.cq, f.cq, tag(101)); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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CQ_EXPECT_COMPLETION(cqv, tag(101), true); |
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cq_verify(cqv); |
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// Make sure the "grpc-previous-rpc-attempts" header was not sent in the
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// initial attempt.
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for (size_t i = 0; i < request_metadata_recv.count; ++i) { |
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GPR_ASSERT(!grpc_slice_eq(request_metadata_recv.metadata[i].key, |
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GRPC_MDSTR_GRPC_PREVIOUS_RPC_ATTEMPTS)); |
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} |
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peer = grpc_call_get_peer(s); |
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GPR_ASSERT(peer != nullptr); |
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gpr_log(GPR_DEBUG, "server_peer=%s", peer); |
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gpr_free(peer); |
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peer = grpc_call_get_peer(c); |
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GPR_ASSERT(peer != nullptr); |
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gpr_log(GPR_DEBUG, "client_peer=%s", peer); |
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gpr_free(peer); |
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memset(ops, 0, sizeof(ops)); |
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op = ops; |
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op->op = GRPC_OP_SEND_INITIAL_METADATA; |
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op->data.send_initial_metadata.count = 0; |
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op++; |
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op->op = GRPC_OP_SEND_STATUS_FROM_SERVER; |
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op->data.send_status_from_server.trailing_metadata_count = 0; |
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op->data.send_status_from_server.status = GRPC_STATUS_ABORTED; |
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op->data.send_status_from_server.status_details = &status_details; |
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op++; |
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op->op = GRPC_OP_RECV_CLOSE_ON_SERVER; |
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op->data.recv_close_on_server.cancelled = &was_cancelled; |
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op++; |
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error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), |
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nullptr); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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CQ_EXPECT_COMPLETION(cqv, tag(102), true); |
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cq_verify(cqv); |
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grpc_call_unref(s); |
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grpc_metadata_array_destroy(&request_metadata_recv); |
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grpc_metadata_array_init(&request_metadata_recv); |
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grpc_call_details_destroy(&call_details); |
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grpc_call_details_init(&call_details); |
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error = |
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grpc_server_request_call(f.server, &s, &call_details, |
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&request_metadata_recv, f.cq, f.cq, tag(201)); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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CQ_EXPECT_COMPLETION(cqv, tag(201), true); |
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cq_verify(cqv); |
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// Make sure the "grpc-previous-rpc-attempts" header was sent in the retry.
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GPR_ASSERT(contains_metadata_slices(&request_metadata_recv, |
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GRPC_MDSTR_GRPC_PREVIOUS_RPC_ATTEMPTS, |
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GRPC_MDSTR_1)); |
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// It should also contain the initial metadata, even though the client
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// freed it already.
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GPR_ASSERT(contains_metadata(&request_metadata_recv, "foo", "bar")); |
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GPR_ASSERT( |
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contains_metadata(&request_metadata_recv, |
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std::string(GRPC_SLICE_INLINED_SIZE + 1, 'x').c_str(), |
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std::string(GRPC_SLICE_INLINED_SIZE + 1, 'y').c_str())); |
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peer = grpc_call_get_peer(s); |
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GPR_ASSERT(peer != nullptr); |
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gpr_log(GPR_DEBUG, "server_peer=%s", peer); |
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gpr_free(peer); |
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peer = grpc_call_get_peer(c); |
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GPR_ASSERT(peer != nullptr); |
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gpr_log(GPR_DEBUG, "client_peer=%s", peer); |
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gpr_free(peer); |
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memset(ops, 0, sizeof(ops)); |
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op = ops; |
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op->op = GRPC_OP_SEND_INITIAL_METADATA; |
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op->data.send_initial_metadata.count = 0; |
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op++; |
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op->op = GRPC_OP_RECV_MESSAGE; |
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op->data.recv_message.recv_message = &request_payload_recv; |
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op++; |
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op->op = GRPC_OP_SEND_MESSAGE; |
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op->data.send_message.send_message = response_payload; |
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op++; |
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op->op = GRPC_OP_SEND_STATUS_FROM_SERVER; |
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op->data.send_status_from_server.trailing_metadata_count = 0; |
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op->data.send_status_from_server.status = GRPC_STATUS_OK; |
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op->data.send_status_from_server.status_details = &status_details; |
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op++; |
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op->op = GRPC_OP_RECV_CLOSE_ON_SERVER; |
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op->data.recv_close_on_server.cancelled = &was_cancelled; |
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op++; |
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error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(202), |
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nullptr); |
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GPR_ASSERT(GRPC_CALL_OK == error); |
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CQ_EXPECT_COMPLETION(cqv, tag(202), true); |
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CQ_EXPECT_COMPLETION(cqv, tag(2), true); |
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cq_verify(cqv); |
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GPR_ASSERT(status == GRPC_STATUS_OK); |
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GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz")); |
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GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/service/method")); |
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GPR_ASSERT(0 == call_details.flags); |
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GPR_ASSERT(was_cancelled == 0); |
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grpc_slice_unref(details); |
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grpc_metadata_array_destroy(&initial_metadata_recv); |
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grpc_metadata_array_destroy(&trailing_metadata_recv); |
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grpc_metadata_array_destroy(&request_metadata_recv); |
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grpc_call_details_destroy(&call_details); |
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grpc_byte_buffer_destroy(request_payload); |
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grpc_byte_buffer_destroy(response_payload); |
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grpc_byte_buffer_destroy(request_payload_recv); |
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grpc_byte_buffer_destroy(response_payload_recv); |
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grpc_call_unref(c); |
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grpc_call_unref(s); |
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cq_verifier_destroy(cqv); |
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end_test(&f); |
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config.tear_down_data(&f); |
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} |
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void retry_send_initial_metadata_refs(grpc_end2end_test_config config) { |
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GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL); |
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test_retry_send_initial_metadata_refs(config); |
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} |
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void retry_send_initial_metadata_refs_pre_init(void) {} |
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