1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
#include "mongo/platform/basic.h"
#include "mongo/db/service_entry_point_mongod.h"
#include "mongo/db/commands/fsync_locked.h"
#include "mongo/db/concurrency/global_lock_acquisition_tracker.h"
#include "mongo/db/curop.h"
#include "mongo/db/read_concern.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/s/implicit_create_collection.h"
#include "mongo/db/s/scoped_operation_completion_sharding_actions.h"
#include "mongo/db/s/shard_filtering_metadata_refresh.h"
#include "mongo/db/s/sharding_config_optime_gossip.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/db/service_entry_point_common.h"
#include "mongo/logger/redaction.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/s/cannot_implicitly_create_collection_info.h"
#include "mongo/s/stale_exception.h"
#include "mongo/util/log.h"
namespace mongo {
class ServiceEntryPointMongod::Hooks final : public ServiceEntryPointCommon::Hooks {
public:
bool lockedForWriting() const override {
return mongo::lockedForWriting();
}
void waitForReadConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const OpMsgRequest& request) const override {
Status rcStatus = mongo::waitForReadConcern(
opCtx, repl::ReadConcernArgs::get(opCtx), invocation->allowsAfterClusterTime());
if (!rcStatus.isOK()) {
if (ErrorCodes::isExceededTimeLimitError(rcStatus.code())) {
const int debugLevel =
serverGlobalParams.clusterRole == ClusterRole::ConfigServer ? 0 : 2;
LOG(debugLevel) << "Command on database " << request.getDatabase()
<< " timed out waiting for read concern to be satisfied. Command: "
<< redact(ServiceEntryPointCommon::getRedactedCopyForLogging(
invocation->definition(), request.body));
}
uassertStatusOK(rcStatus);
}
}
void waitForWriteConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const repl::OpTime& lastOpBeforeRun,
BSONObjBuilder& commandResponseBuilder) const override {
auto lastOpAfterRun = repl::ReplClientInfo::forClient(opCtx->getClient()).getLastOp();
// Ensures that if we tried to do a write, we wait for write concern, even if that write was
// a noop.
if ((lastOpAfterRun == lastOpBeforeRun) &&
GlobalLockAcquisitionTracker::get(opCtx).getGlobalExclusiveLockTaken()) {
repl::ReplClientInfo::forClient(opCtx->getClient()).setLastOpToSystemLastOpTime(opCtx);
lastOpAfterRun = repl::ReplClientInfo::forClient(opCtx->getClient()).getLastOp();
}
WriteConcernResult res;
auto waitForWCStatus =
mongo::waitForWriteConcern(opCtx, lastOpAfterRun, opCtx->getWriteConcern(), &res);
CommandHelpers::appendCommandWCStatus(commandResponseBuilder, waitForWCStatus, res);
// SERVER-22421: This code is to ensure error response backwards compatibility with the
// user management commands. This can be removed in 3.6.
if (!waitForWCStatus.isOK() && invocation->definition()->isUserManagementCommand()) {
BSONObj temp = commandResponseBuilder.asTempObj().copy();
commandResponseBuilder.resetToEmpty();
CommandHelpers::appendCommandStatusNoThrow(commandResponseBuilder, waitForWCStatus);
commandResponseBuilder.appendElementsUnique(temp);
}
}
void waitForLinearizableReadConcern(OperationContext* opCtx) const override {
// When a linearizable read command is passed in, check to make sure we're reading
// from the primary.
if (repl::ReadConcernArgs::get(opCtx).getLevel() ==
repl::ReadConcernLevel::kLinearizableReadConcern) {
uassertStatusOK(mongo::waitForLinearizableReadConcern(opCtx));
}
}
void uassertCommandDoesNotSpecifyWriteConcern(const BSONObj& cmd) const override {
if (commandSpecifiesWriteConcern(cmd)) {
uasserted(ErrorCodes::InvalidOptions, "Command does not support writeConcern");
}
}
void attachCurOpErrInfo(OperationContext* opCtx, const BSONObj& replyObj) const override {
CurOp::get(opCtx)->debug().errInfo = getStatusFromCommandResult(replyObj);
}
void handleException(const DBException& e, OperationContext* opCtx) const override {
// If we got a stale config, wait in case the operation is stuck in a critical section
if (auto sce = e.extraInfo<StaleConfigInfo>()) {
if (!opCtx->getClient()->isInDirectClient()) {
// We already have the StaleConfig exception, so just swallow any errors due to
// refresh
onShardVersionMismatchNoExcept(opCtx, sce->getNss(), sce->getVersionReceived())
.ignore();
}
} else if (auto sce = e.extraInfo<StaleDbRoutingVersion>()) {
if (!opCtx->getClient()->isInDirectClient()) {
onDbVersionMismatchNoExcept(
opCtx, sce->getDb(), sce->getVersionReceived(), sce->getVersionWanted())
.ignore();
}
} else if (auto cannotImplicitCreateCollInfo =
e.extraInfo<CannotImplicitlyCreateCollectionInfo>()) {
if (ShardingState::get(opCtx)->enabled()) {
onCannotImplicitlyCreateCollection(opCtx, cannotImplicitCreateCollInfo->getNss())
.ignore();
}
}
}
void advanceConfigOptimeFromRequestMetadata(OperationContext* opCtx) const override {
// Handle config optime information that may have been sent along with the command.
rpc::advanceConfigOptimeFromRequestMetadata(opCtx);
}
std::unique_ptr<PolymorphicScoped> scopedOperationCompletionShardingActions(
OperationContext* opCtx) const override {
return std::make_unique<ScopedOperationCompletionShardingActions>(opCtx);
}
};
DbResponse ServiceEntryPointMongod::handleRequest(OperationContext* opCtx, const Message& m) {
return ServiceEntryPointCommon::handleRequest(opCtx, m, Hooks{});
}
} // namespace mongo
|
