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
|
/**
* 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_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/s/database_sharding_state.h"
#include "mongo/db/s/migration_source_manager.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/shard_filtering_metadata_refresh.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/s/catalog_cache_loader.h"
#include "mongo/s/grid.h"
#include "mongo/s/request_types/flush_database_cache_updates_gen.h"
#include "mongo/logv2/log.h"
namespace mongo {
namespace {
class FlushDatabaseCacheUpdatesCmd final : public TypedCommand<FlushDatabaseCacheUpdatesCmd> {
public:
using Request = _flushDatabaseCacheUpdates;
std::string help() const override {
return "Internal command which waits for any pending routing table cache updates for a "
"particular database to be written locally. The operationTime returned in the "
"response metadata is guaranteed to be at least as late as the last routing table "
"cache update to the local disk. Takes a 'forceRemoteRefresh' option to make this "
"node refresh its cache from the config server before waiting for the last refresh "
"to be persisted.";
}
bool adminOnly() const override {
return true;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
class Invocation final : public InvocationBase {
public:
using InvocationBase::InvocationBase;
/**
* ns() is the database to flush, with no collection.
*/
NamespaceString ns() const {
return NamespaceString(_dbName(), "");
}
bool supportsWriteConcern() const override {
return false;
}
void doCheckAuthorization(OperationContext* opCtx) const override {
uassert(ErrorCodes::Unauthorized,
"Unauthorized",
AuthorizationSession::get(opCtx->getClient())
->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
ActionType::internal));
}
void typedRun(OperationContext* opCtx) {
auto const shardingState = ShardingState::get(opCtx);
uassertStatusOK(shardingState->canAcceptShardedCommands());
uassert(ErrorCodes::IllegalOperation,
"Can't issue _flushDatabaseCacheUpdates from 'eval'",
!opCtx->getClient()->isInDirectClient());
uassert(ErrorCodes::IllegalOperation,
"Can't call _flushDatabaseCacheUpdates if in read-only mode",
!storageGlobalParams.readOnly);
auto& oss = OperationShardingState::get(opCtx);
{
AutoGetDb autoDb(opCtx, _dbName(), MODE_IS);
// If the primary is in the critical section, secondaries must wait for the commit
// to finish on the primary in case a secondary's caller has an afterClusterTime
// inclusive of the commit (and new writes to the committed chunk) that hasn't yet
// propagated back to this shard. This ensures the read your own writes causal
// consistency guarantee.
const auto dss = DatabaseShardingState::get(opCtx, _dbName());
auto dssLock = DatabaseShardingState::DSSLock::lockShared(opCtx, dss);
if (auto criticalSectionSignal = dss->getCriticalSectionSignal(
ShardingMigrationCriticalSection::kRead, dssLock)) {
oss.setMigrationCriticalSectionSignal(criticalSectionSignal);
}
}
oss.waitForMigrationCriticalSectionSignal(opCtx);
if (request().getSyncFromConfig()) {
LOGV2_DEBUG(21981,
1,
"Forcing remote routing table refresh for {db}",
"Forcing remote routing table refresh",
"db"_attr = _dbName());
forceDatabaseRefresh(opCtx, _dbName());
}
getCatalogCacheLoaderForFiltering(opCtx).waitForDatabaseFlush(opCtx, _dbName());
repl::ReplClientInfo::forClient(opCtx->getClient()).setLastOpToSystemLastOpTime(opCtx);
}
private:
StringData _dbName() const {
return request().getCommandParameter();
}
};
} _flushDatabaseCacheUpdatesCmd;
} // namespace
} // namespace mongo
|
