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
|
/**
* Copyright (C) 2018 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 <string>
#include <vector>
#include "mongo/db/catalog/catalog_control.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/test_commands_enabled.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/util/log.h"
namespace mongo {
/**
* This testing-only command causes the server to close and reopen the catalog, rebuilding all
* in-memory data structures.
*/
class RestartCatalogCmd final : public BasicCommand {
public:
RestartCatalogCmd() : BasicCommand("restartCatalog") {}
Status checkAuthForOperation(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj) const final {
// No auth checks as this is a testing-only command.
return Status::OK();
}
bool adminOnly() const final {
return true;
}
bool maintenanceMode() const final {
return true;
}
bool maintenanceOk() const final {
return false;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const final {
return AllowedOnSecondary::kAlways;
}
bool supportsWriteConcern(const BSONObj& cmd) const final {
return false;
}
std::string help() const final {
return "restart catalog\n"
"Internal command for testing only. Closes and restores the catalog, rebuilding\n"
"in-memory data structures as needed.\n";
}
bool run(OperationContext* opCtx,
const std::string& db,
const BSONObj& cmdObj,
BSONObjBuilder& result) final {
Lock::GlobalLock global(opCtx, MODE_X, Date_t::max());
// This command will fail without modifying the catalog if there are any databases that are
// marked drop-pending. (Otherwise, the Database object will be reconstructed when
// re-opening the catalog, but with the drop pending flag cleared.)
std::vector<std::string> allDbs;
getGlobalServiceContext()->getGlobalStorageEngine()->listDatabases(&allDbs);
for (auto&& dbName : allDbs) {
const auto db = dbHolder().get(opCtx, dbName);
if (db->isDropPending(opCtx)) {
return CommandHelpers::appendCommandStatus(
result,
{ErrorCodes::DatabaseDropPending,
str::stream() << "cannot restart the catalog because database " << dbName
<< " is pending removal"});
}
}
log() << "Closing database catalog";
catalog::closeCatalog(opCtx);
log() << "Reopening database catalog";
catalog::openCatalog(opCtx);
return true;
}
};
MONGO_INITIALIZER(RegisterRestartCatalogCommand)(InitializerContext* ctx) {
if (getTestCommandsEnabled()) {
// Leaked intentionally: a Command registers itself when constructed.
new RestartCatalogCmd();
}
return Status::OK();
}
} // namespace mongo
|