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
|
// s_only.cpp
/* Copyright 2009 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::kSharding
#include "mongo/platform/basic.h"
#include <tuple>
#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/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/service_context.h"
#include "mongo/db/stats/counters.h"
#include "mongo/rpc/metadata.h"
#include "mongo/rpc/reply_builder_interface.h"
#include "mongo/rpc/request_interface.h"
#include "mongo/s/cluster_last_error_info.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/concurrency/thread_name.h"
#include "mongo/util/log.h"
namespace mongo {
using std::string;
using std::stringstream;
bool isMongos() {
return true;
}
/** When this callback is run, we record a shard that we've used for useful work
* in an operation to be read later by getLastError()
*/
void usingAShardConnection(const std::string& addr) {
ClusterLastErrorInfo::get(cc()).addShardHost(addr);
}
// called into by the web server. For now we just translate the parameters
// to their old style equivalents.
void Command::execCommand(OperationContext* txn,
Command* command,
const rpc::RequestInterface& request,
rpc::ReplyBuilderInterface* replyBuilder) {
int queryFlags = 0;
BSONObj cmdObj;
std::tie(cmdObj, queryFlags) = uassertStatusOK(
rpc::downconvertRequestMetadata(request.getCommandArgs(), request.getMetadata()));
std::string db = request.getDatabase().rawData();
BSONObjBuilder result;
execCommandClientBasic(txn,
command,
*txn->getClient(),
queryFlags,
request.getDatabase().rawData(),
cmdObj,
result);
replyBuilder->setMetadata(rpc::makeEmptyMetadata()).setCommandReply(result.done());
}
void Command::execCommandClientBasic(OperationContext* txn,
Command* c,
ClientBasic& client,
int queryOptions,
const char* ns,
BSONObj& cmdObj,
BSONObjBuilder& result) {
std::string dbname = nsToDatabase(ns);
if (cmdObj.getBoolField("help")) {
stringstream help;
help << "help for: " << c->name << " ";
c->help(help);
result.append("help", help.str());
result.append("lockType", c->isWriteCommandForConfigServer() ? 1 : 0);
appendCommandStatus(result, true, "");
return;
}
Status status = _checkAuthorization(c, &client, dbname, cmdObj);
if (!status.isOK()) {
appendCommandStatus(result, status);
return;
}
c->_commandsExecuted.increment();
if (c->shouldAffectCommandCounter()) {
globalOpCounters.gotCommand();
}
std::string errmsg;
bool ok;
try {
ok = c->run(txn, dbname, cmdObj, queryOptions, errmsg, result);
} catch (const DBException& e) {
ok = false;
int code = e.getCode();
if (code == RecvStaleConfigCode) { // code for StaleConfigException
throw;
}
errmsg = e.what();
result.append("code", code);
}
if (!ok) {
c->_commandsFailed.increment();
}
appendCommandStatus(result, ok, errmsg);
}
void Command::runAgainstRegistered(OperationContext* txn,
const char* ns,
BSONObj& jsobj,
BSONObjBuilder& anObjBuilder,
int queryOptions) {
// It should be impossible for this uassert to fail since there should be no way to get
// into this function with any other collection name.
uassert(16618,
"Illegal attempt to run a command against a namespace other than $cmd.",
nsToCollectionSubstring(ns) == "$cmd");
BSONElement e = jsobj.firstElement();
std::string commandName = e.fieldName();
Command* c = e.type() ? Command::findCommand(commandName) : NULL;
if (!c) {
Command::appendCommandStatus(
anObjBuilder, false, str::stream() << "no such cmd: " << commandName);
anObjBuilder.append("code", ErrorCodes::CommandNotFound);
Command::unknownCommands.increment();
return;
}
execCommandClientBasic(txn, c, cc(), queryOptions, ns, jsobj, anObjBuilder);
}
void Command::registerError(OperationContext* txn, const DBException& exception) {}
} // namespace mongo
|
