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
|
/**
* Copyright (C) 2008 10gen 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 <sstream>
#include <string>
#include <vector>
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_manager_global.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/auth/resource_pattern.h"
#include "mongo/db/catalog/apply_ops.h"
#include "mongo/db/catalog/document_validation.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/dbhash.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/service_context.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/matcher/matcher.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/write_concern.h"
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::string;
using std::stringstream;
class ApplyOpsCmd : public Command {
public:
virtual bool slaveOk() const {
return false;
}
ApplyOpsCmd() : Command("applyOps") {}
virtual void help(stringstream& help) const {
help << "internal (sharding)\n{ applyOps : [ ] , preCondition : [ { ns : ... , q : ... , "
"res : ... } ] }";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
// applyOps can do pretty much anything, so require all privileges.
RoleGraph::generateUniversalPrivileges(out);
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
boost::optional<DisableDocumentValidation> maybeDisableValidation;
if (shouldBypassDocumentValidationForCommand(cmdObj))
maybeDisableValidation.emplace(txn);
if (cmdObj.firstElement().type() != Array) {
errmsg = "ops has to be an array";
return false;
}
BSONObj ops = cmdObj.firstElement().Obj();
{
// check input
BSONObjIterator i(ops);
while (i.more()) {
BSONElement e = i.next();
if (!_checkOperation(e, errmsg)) {
return false;
}
}
}
StatusWith<WriteConcernOptions> wcResult = extractWriteConcern(txn, cmdObj, dbname);
if (!wcResult.isOK()) {
return appendCommandStatus(result, wcResult.getStatus());
}
txn->setWriteConcern(wcResult.getValue());
setupSynchronousCommit(txn);
auto client = txn->getClient();
auto lastOpAtOperationStart = repl::ReplClientInfo::forClient(client).getLastOp();
ScopeGuard lastOpSetterGuard =
MakeObjGuard(repl::ReplClientInfo::forClient(client),
&repl::ReplClientInfo::setLastOpToSystemLastOpTime,
txn);
auto applyOpsStatus = appendCommandStatus(result, applyOps(txn, dbname, cmdObj, &result));
if (repl::ReplClientInfo::forClient(client).getLastOp() != lastOpAtOperationStart) {
// If this operation has already generated a new lastOp, don't bother setting it
// here. No-op applyOps will not generate a new lastOp, so we still need the guard to
// fire in that case.
lastOpSetterGuard.Dismiss();
}
WriteConcernResult res;
auto waitForWCStatus =
waitForWriteConcern(txn,
repl::ReplClientInfo::forClient(txn->getClient()).getLastOp(),
txn->getWriteConcern(),
&res);
appendCommandWCStatus(result, waitForWCStatus);
return applyOpsStatus;
}
private:
/**
* Returns true if 'e' contains a valid operation.
*/
bool _checkOperation(const BSONElement& e, string& errmsg) {
if (e.type() != Object) {
errmsg = str::stream() << "op not an object: " << e.fieldName();
return false;
}
BSONObj obj = e.Obj();
// op - operation type
BSONElement opElement = obj.getField("op");
if (opElement.eoo()) {
errmsg = str::stream()
<< "op does not contain required \"op\" field: " << e.fieldName();
return false;
}
if (opElement.type() != mongo::String) {
errmsg = str::stream() << "\"op\" field is not a string: " << e.fieldName();
return false;
}
// operation type -- see logOp() comments for types
const char* opType = opElement.valuestrsafe();
if (*opType == '\0') {
errmsg = str::stream() << "\"op\" field value cannot be empty: " << e.fieldName();
return false;
}
// ns - namespace
// Only operations of type 'n' are allowed to have an empty namespace.
BSONElement nsElement = obj.getField("ns");
if (nsElement.eoo()) {
errmsg = str::stream()
<< "op does not contain required \"ns\" field: " << e.fieldName();
return false;
}
if (nsElement.type() != mongo::String) {
errmsg = str::stream() << "\"ns\" field is not a string: " << e.fieldName();
return false;
}
if (nsElement.String().find('\0') != std::string::npos) {
errmsg = str::stream() << "namespaces cannot have embedded null characters";
return false;
}
if (*opType != 'n' && nsElement.String().empty()) {
errmsg = str::stream()
<< "\"ns\" field value cannot be empty when op type is not 'n': " << e.fieldName();
return false;
}
return true;
}
} applyOpsCmd;
}
|
