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
|
// s/request.cpp
/**
* 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/>.
*/
#include "pch.h"
#include "server.h"
#include "../db/commands.h"
#include "../db/dbmessage.h"
#include "../db/stats/counters.h"
#include "../client/connpool.h"
#include "request.h"
#include "config.h"
#include "chunk.h"
#include "stats.h"
#include "cursors.h"
#include "grid.h"
#include "client.h"
namespace mongo {
Request::Request( Message& m, AbstractMessagingPort* p ) :
_m(m) , _d( m ) , _p(p) , _didInit(false) {
assert( _d.getns() );
_id = _m.header()->id;
_clientInfo = ClientInfo::get();
_clientInfo->newRequest( p );
}
void Request::checkAuth( Auth::Level levelNeeded ) const {
char cl[256];
nsToDatabase(getns(), cl);
uassert( 15845 ,
str::stream() << "unauthorized for db:" << cl << " level: " << levelNeeded ,
_clientInfo->getAuthenticationInfo()->isAuthorizedForLevel(cl,levelNeeded) );
}
void Request::init() {
if ( _didInit )
return;
_didInit = true;
reset();
}
// Deprecated, will move to the strategy itself
void Request::reset() {
if ( _m.operation() == dbKillCursors ) {
return;
}
uassert( 13644 , "can't use 'local' database through mongos" , ! str::startsWith( getns() , "local." ) );
// TODO: Deprecated, keeping to preserve codepath for now
const string nsStr (getns()); // use in functions taking string rather than char*
_config = grid.getDBConfig( nsStr );
// TODO: In general, throwing an exception when the cm doesn't exist is really annoying
if ( _config->isSharded( nsStr ) ) {
_chunkManager = _config->getChunkManagerIfExists( nsStr );
}
else {
_chunkManager.reset();
}
_m.header()->id = _id;
_clientInfo->clearCurrentShards();
}
// Deprecated, will move to the strategy itself
Shard Request::primaryShard() const {
assert( _didInit );
if ( _chunkManager ) {
if ( _chunkManager->numChunks() > 1 )
throw UserException( 8060 , "can't call primaryShard on a sharded collection" );
return _chunkManager->findChunk( _chunkManager->getShardKey().globalMin() )->getShard();
}
Shard s = _config->getShard( getns() );
uassert( 10194 , "can't call primaryShard on a sharded collection!" , s.ok() );
return s;
}
void Request::process( int attempt ) {
init();
int op = _m.operation();
assert( op > dbMsg );
if ( op == dbKillCursors ) {
cursorCache.gotKillCursors( _m );
return;
}
LOG(3) << "Request::process ns: " << getns() << " msg id:" << (int)(_m.header()->id) << " attempt: " << attempt << endl;
Strategy * s = SHARDED;
_counter = &opsNonSharded;
_d.markSet();
bool iscmd = false;
if ( op == dbQuery ) {
iscmd = isCommand();
s->queryOp( *this );
}
else if ( op == dbGetMore ) {
checkAuth( Auth::READ ); // this is important so someone can't steal a cursor
s->getMore( *this );
}
else {
checkAuth( Auth::WRITE );
s->writeOp( op, *this );
}
globalOpCounters.gotOp( op , iscmd );
_counter->gotOp( op , iscmd );
}
bool Request::isCommand() const {
int x = _d.getQueryNToReturn();
return ( x == 1 || x == -1 ) && strstr( getns() , ".$cmd" );
}
void Request::gotInsert() {
globalOpCounters.gotInsert();
_counter->gotInsert();
}
void Request::reply( Message & response , const string& fromServer ) {
assert( _didInit );
long long cursor =response.header()->getCursor();
if ( cursor ) {
if ( fromServer.size() ) {
cursorCache.storeRef( fromServer , cursor );
}
else {
// probably a getMore
// make sure we have a ref for this
assert( cursorCache.getRef( cursor ).size() );
}
}
_p->reply( _m , response , _id );
}
} // namespace mongo
|
