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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
// client.cpp
/**
* Copyright (C) 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/>.
*/
/* Client represents a connection to the database (the server-side) and corresponds
to an open socket (or logical connection if pooling on sockets) from a client.
*/
#include "stdafx.h"
#include "db.h"
#include "client.h"
#include "curop.h"
#include "json.h"
#include "security.h"
namespace mongo {
mongo::mutex Client::clientsMutex;
set<Client*> Client::clients; // always be in clientsMutex when manipulating this
boost::thread_specific_ptr<Client> currentClient;
Client::Client(const char *desc) :
_context(0),
_shutdown(false),
_desc(desc),
_god(0)
{
_curOp = new CurOp( this );
scoped_lock bl(clientsMutex);
clients.insert(this);
}
Client::~Client() {
delete _curOp;
_god = 0;
if ( _context )
cout << "ERROR: Client::~Client _context should be NULL: " << _desc << endl;
if ( !_shutdown )
cout << "ERROR: Client::shutdown not called: " << _desc << endl;
}
bool Client::shutdown(){
_shutdown = true;
if ( inShutdown() )
return false;
{
scoped_lock bl(clientsMutex);
clients.erase(this);
}
bool didAnything = false;
if ( _tempCollections.size() ){
didAnything = true;
for ( list<string>::iterator i = _tempCollections.begin(); i!=_tempCollections.end(); i++ ){
string ns = *i;
Top::global.collectionDropped( ns );
dblock l;
Client::Context ctx( ns );
if ( ! nsdetails( ns.c_str() ) )
continue;
try {
string err;
BSONObjBuilder b;
dropCollection( ns , err , b );
}
catch ( ... ){
log() << "error dropping temp collection: " << ns << endl;
}
}
_tempCollections.clear();
}
return didAnything;
}
BSONObj CurOp::_tooBig = fromjson("{\"$msg\":\"query not recording (too large)\"}");
AtomicUInt CurOp::_nextOpNum;
Client::Context::Context( string ns , Database * db, bool doauth )
: _client( currentClient.get() ) , _oldContext( _client->_context ) ,
_path( dbpath ) , _lock(0) , _justCreated(false) {
assert( db && db->isOk() );
_ns = ns;
_db = db;
_client->_context = this;
if ( doauth )
_auth();
}
void Client::Context::_finishInit( bool doauth ){
int lockState = dbMutex.getState();
assert( lockState );
_db = dbHolder.get( _ns , _path );
if ( _db ){
_justCreated = false;
}
else if ( dbMutex.getState() > 0 ){
// already in a write lock
_db = dbHolder.getOrCreate( _ns , _path , _justCreated );
assert( _db );
}
else if ( dbMutex.getState() < -1 ){
// nested read lock :(
assert( _lock );
_lock->releaseAndWriteLock();
_db = dbHolder.getOrCreate( _ns , _path , _justCreated );
assert( _db );
}
else {
// we have a read lock, but need to get a write lock for a bit
// we need to be in a write lock since we're going to create the DB object
// to do that, we're going to unlock, then get a write lock
// this is so that if this is the first query and its long doesn't block db
// we just have to check that the db wasn't closed in the interim where we unlock
for ( int x=0; x<2; x++ ){
{
dbtemprelease unlock;
writelock lk( _ns );
dbHolder.getOrCreate( _ns , _path , _justCreated );
}
_db = dbHolder.get( _ns , _path );
if ( _db )
break;
log() << "db was closed on us right after we opened it: " << _ns << endl;
}
uassert( 13005 , "can't create db, keeps getting closed" , _db );
}
_client->_context = this;
_client->_curOp->enter( this );
if ( doauth )
_auth( lockState );
}
void Client::Context::_auth( int lockState ){
if ( _client->_ai.isAuthorizedForLock( _db->name , lockState ) )
return;
// before we assert, do a little cleanup
_client->_context = _oldContext; // note: _oldContext may be null
stringstream ss;
ss << "unauthorized for db [" << _db->name << "] lock type: " << lockState << endl;
massert( 10057 , ss.str() , 0 );
}
Client::Context::~Context() {
DEV assert( _client == currentClient.get() );
_client->_curOp->leave( this );
_client->_context = _oldContext; // note: _oldContext may be null
}
string Client::toString() const {
stringstream ss;
if ( _curOp )
ss << _curOp->infoNoauth().jsonString();
return ss.str();
}
string sayClientState(){
Client* c = currentClient.get();
if ( ! c )
return "no client";
return c->toString();
}
void curopWaitingForLock( int type ){
Client * c = currentClient.get();
assert( c );
CurOp * co = c->curop();
if ( co ){
co->waitingForLock( type );
}
}
void curopGotLock(){
Client * c = currentClient.get();
assert(c);
CurOp * co = c->curop();
if ( co ){
co->gotLock();
}
}
BSONObj CurOp::infoNoauth() {
BSONObjBuilder b;
b.append("opid", _opNum);
bool a = _active && _start;
b.append("active", a);
if ( _lockType )
b.append("lockType" , _lockType > 0 ? "write" : "read" );
b.append("waitingForLock" , _waitingForLock );
if( a ){
b.append("secs_running", elapsedSeconds() );
}
b.append( "op" , opToString( _op ) );
b.append("ns", _ns);
if( haveQuery() ) {
b.append("query", query());
}
// b.append("inLock", ??
stringstream clientStr;
clientStr << inet_ntoa( _remote.sin_addr ) << ":" << ntohs( _remote.sin_port );
b.append("client", clientStr.str());
if ( _client )
b.append( "desc" , _client->desc() );
if ( ! _message.empty() ){
if ( _progressMeter.isActive() ){
StringBuilder buf(128);
buf << _message << " " << _progressMeter.toString();
b.append( "msg" , buf.str() );
}
else {
b.append( "msg" , _message );
}
}
return b.obj();
}
}
|
