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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/**
* 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/base/status.h"
#include "mongo/client/sasl_client_authenticate.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/resource_pattern.h"
#include "mongo/db/auth/sasl_command_constants.h"
#include "mongo/db/catalog/document_validation.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/cloner.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/copydb.h"
#include "mongo/db/commands/copydb_start_commands.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/namespace_string.h"
#include "mongo/util/log.h"
namespace {
using namespace mongo;
using std::string;
using std::stringstream;
/* The copydb command is deprecated. See http://dochub.mongodb.org/core/copydb-clone-deprecation.
* Usage:
* admindb.$cmd.findOne( { copydb: 1, fromhost: <connection string>, fromdb: <db>,
* todb: <db>[, username: <username>, nonce: <nonce>, key: <key>] } );
*
* The "copydb" command is used to copy a database. Note that this is a very broad definition.
* This means that the "copydb" command can be used in the following ways:
*
* 1. To copy a database within a single node
* 2. To copy a database within a sharded cluster, possibly to another shard
* 3. To copy a database from one cluster to another
*
* Note that in all cases both the target and source database must be unsharded.
*
* The "copydb" command gets sent by the client or the mongos to the destination of the copy
* operation. The node, cluster, or shard that recieves the "copydb" command must then query
* the source of the database to be copied for all the contents and metadata of the database.
*
*
*
* When used with auth, there are two different considerations.
*
* The first is authentication with the target. The only entity that needs to authenticate with
* the target node is the client, so authentication works there the same as it would with any
* other command.
*
* The second is the authentication of the target with the source, which is needed because the
* target must query the source directly for the contents of the database. To do this, the
* client must use the "copydbgetnonce" command, in which the target will get a nonce from the
* source and send it back to the client. The client can then hash its password with the nonce,
* send it to the target when it runs the "copydb" command, which can then use that information
* to authenticate with the source.
*
* NOTE: mongos doesn't know how to call or handle the "copydbgetnonce" command. See
* SERVER-6427.
*
* NOTE: Since internal cluster auth works differently, "copydb" currently doesn't work between
* shards in a cluster when auth is enabled. See SERVER-13080.
*/
class CmdCopyDb : public ErrmsgCommandDeprecated {
public:
CmdCopyDb() : ErrmsgCommandDeprecated("copydb") {}
virtual bool adminOnly() const {
return true;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) const {
return copydb::checkAuthForCopydbCommand(client, dbname, cmdObj);
}
std::string help() const override {
return "copy a database from another host to this host\n"
"usage: {copydb: 1, fromhost: <connection string>, fromdb: <db>, todb: <db>"
"[, slaveOk: <bool>, username: <username>, nonce: <nonce>, key: <key>]}";
}
virtual bool errmsgRun(OperationContext* opCtx,
const string& dbname,
const BSONObj& cmdObj,
string& errmsg,
BSONObjBuilder& result) {
const char* deprecationWarning =
"Support for the copydb command has been deprecated. See "
"http://dochub.mongodb.org/core/copydb-clone-deprecation";
warning() << deprecationWarning;
result.append("note", deprecationWarning);
boost::optional<DisableDocumentValidation> maybeDisableValidation;
if (shouldBypassDocumentValidationForCommand(cmdObj))
maybeDisableValidation.emplace(opCtx);
string fromhost = cmdObj.getStringField("fromhost");
bool fromSelf = fromhost.empty();
if (fromSelf) {
/* copy from self */
stringstream ss;
ss << "localhost:" << serverGlobalParams.port;
fromhost = ss.str();
}
CloneOptions cloneOptions;
const auto fromdbElt = cmdObj["fromdb"];
uassert(ErrorCodes::TypeMismatch,
"'fromdb' must be of type String",
fromdbElt.type() == BSONType::String);
cloneOptions.fromDB = fromdbElt.str();
cloneOptions.slaveOk = cmdObj["slaveOk"].trueValue();
cloneOptions.useReplAuth = false;
const auto todbElt = cmdObj["todb"];
uassert(ErrorCodes::TypeMismatch,
"'todb' must be of type String",
todbElt.type() == BSONType::String);
const std::string todb = todbElt.str();
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid 'todb' name: " << todb,
NamespaceString::validDBName(todb, NamespaceString::DollarInDbNameBehavior::Allow));
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid 'fromdb' name: " << cloneOptions.fromDB,
NamespaceString::validDBName(cloneOptions.fromDB,
NamespaceString::DollarInDbNameBehavior::Allow));
if (fromhost.empty()) {
errmsg =
"params missing - {copydb: 1, fromhost: <connection string>, "
"fromdb: <db>, todb: <db>}";
return false;
}
Cloner cloner;
auto& authConn = CopyDbAuthConnection::forClient(opCtx->getClient());
if (cmdObj.hasField(saslCommandConversationIdFieldName) &&
cmdObj.hasField(saslCommandPayloadFieldName)) {
uassert(25487, "must call copydbsaslstart first", authConn.get());
BSONObj ret;
if (!authConn->runCommand(
cloneOptions.fromDB,
BSON("saslContinue" << 1 << cmdObj[saslCommandConversationIdFieldName]
<< cmdObj[saslCommandPayloadFieldName]),
ret)) {
errmsg = "unable to login " + ret.toString();
authConn.reset();
return false;
}
if (!ret["done"].Bool()) {
CommandHelpers::filterCommandReplyForPassthrough(ret, &result);
return true;
}
result.append("done", true);
cloner.setConnection(std::move(authConn));
} else if (!fromSelf) {
// If fromSelf leave the cloner's conn empty, it will use a DBDirectClient instead.
const ConnectionString cs(uassertStatusOK(ConnectionString::parse(fromhost)));
auto conn = cs.connect(StringData(), errmsg);
if (!conn) {
return false;
}
cloner.setConnection(std::move(conn));
}
// Either we didn't need the authConn (if we even had one), or we already moved it
// into the cloner so just make sure we don't keep it around if we don't need it.
authConn.reset();
if (fromSelf) {
// SERVER-4328 todo lock just the two db's not everything for the fromself case
// SERVER-34431 TODO: Add calls to DatabaseShardingState::get().checkDbVersion()
// for source databases.
Lock::GlobalWrite lk(opCtx);
uassertStatusOK(cloner.copyDb(opCtx, todb, fromhost, cloneOptions, NULL));
} else {
AutoGetDb autoDb(opCtx, todb, MODE_X);
uassertStatusOK(cloner.copyDb(opCtx, todb, fromhost, cloneOptions, NULL));
}
return true;
}
} cmdCopyDB;
} // namespace
|
