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
|
/**
* Copyright (C) 2015 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 <limits>
#include "mongo/base/init.h"
#include "mongo/base/status.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
class KillOpCommand : public Command {
public:
KillOpCommand() : Command("killOp") {}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool slaveOk() const final {
return true;
}
bool adminOnly() const final {
return true;
}
static long long parseOpId(const BSONObj& cmdObj) {
long long op;
uassertStatusOK(bsonExtractIntegerField(cmdObj, "op", &op));
// Internally opid is an unsigned 32-bit int, but as BSON only has signed integer types,
// we wrap values exceeding 2,147,483,647 to negative numbers. The following undoes this
// transformation, so users can use killOp on the (negative) opid they received.
if (op >= std::numeric_limits<int>::min() && op < 0)
op += 1ull << 32;
uassert(26823,
str::stream() << "invalid op : " << op,
(op >= 0) && (op <= std::numeric_limits<unsigned int>::max()));
return op;
}
static StatusWith<std::tuple<stdx::unique_lock<Client>, OperationContext*>> _findOp(
Client* client, unsigned int opId) {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
for (ServiceContext::LockedClientsCursor cursor(client->getServiceContext());
Client* opClient = cursor.next();) {
stdx::unique_lock<Client> lk(*opClient);
OperationContext* opCtx = opClient->getOperationContext();
if (opCtx && opCtx->getOpID() == opId) {
if (authzSession->isAuthorizedForActionsOnResource(
ResourcePattern::forClusterResource(), ActionType::killop) ||
authzSession->isCoauthorizedWithClient(opClient)) {
return {std::make_tuple(std::move(lk), opCtx)};
}
break;
}
}
return Status(ErrorCodes::NoSuchKey, str::stream() << "Could not access opID: " << opId);
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) final {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
if (authzSession->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
ActionType::killop)) {
// If we have administrative permission to run killop, we don't need to traverse the
// Client list to figure out if we own the operation which will be terminated.
return Status::OK();
}
bool isAuthenticated =
AuthorizationSession::get(client)->getAuthenticatedUserNames().more();
if (isAuthenticated) {
long long opId = parseOpId(cmdObj);
auto swLkAndOp = _findOp(client, opId);
if (swLkAndOp.isOK()) {
// We were able to find the Operation, and we were authorized to interact with it.
return Status::OK();
}
}
return Status(ErrorCodes::Unauthorized, "Unauthorized");
}
bool run(OperationContext* txn,
const std::string& db,
BSONObj& cmdObj,
int options,
std::string& errmsg,
BSONObjBuilder& result) final {
long long opId = parseOpId(cmdObj);
log() << "going to kill op: " << opId;
result.append("info", "attempting to kill op");
auto swLkAndOp = _findOp(txn->getClient(), opId);
if (swLkAndOp.isOK()) {
stdx::unique_lock<Client> lk;
OperationContext* opCtx;
std::tie(lk, opCtx) = std::move(swLkAndOp.getValue());
txn->getServiceContext()->killOperation(opCtx);
}
return true;
}
} killOpCmd;
} // namespace mongo
|
