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// introspect.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 "mongo/pch.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/principal_set.h"
#include "mongo/db/curop.h"
#include "mongo/db/databaseholder.h"
#include "mongo/db/introspect.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/pdfile.h"
#include "mongo/util/goodies.h"
namespace {
const size_t MAX_PROFILE_DOC_SIZE_BYTES = 100*1024;
}
namespace mongo {
namespace {
void _appendUserInfo(const Client& c,
BSONObjBuilder& builder,
AuthorizationSession* authSession) {
PrincipalSet::NameIterator nameIter = authSession->getAuthenticatedPrincipalNames();
PrincipalName bestUser;
if (nameIter.more())
bestUser = *nameIter;
StringData opdb( nsToDatabaseSubstring( c.ns() ) );
BSONArrayBuilder allUsers(builder.subarrayStart("allUsers"));
for ( ; nameIter.more(); nameIter.next()) {
BSONObjBuilder nextUser(allUsers.subobjStart());
nextUser.append(AuthorizationManager::USER_NAME_FIELD_NAME, nameIter->getUser());
nextUser.append(AuthorizationManager::USER_SOURCE_FIELD_NAME, nameIter->getDB());
nextUser.doneFast();
if (nameIter->getDB() == opdb) {
bestUser = *nameIter;
}
}
allUsers.doneFast();
builder.append("user", bestUser.getUser().empty() ? "" : bestUser.getFullName());
}
} // namespace
static void _profile(const Client& c, CurOp& currentOp, BufBuilder& profileBufBuilder) {
Database *db = c.database();
DEV verify( db );
const char *ns = db->profileName.c_str();
// build object
BSONObjBuilder b(profileBufBuilder);
const bool isQueryObjTooBig = !currentOp.debug().append(currentOp, b,
MAX_PROFILE_DOC_SIZE_BYTES);
b.appendDate("ts", jsTime());
b.append("client", c.clientAddress());
AuthorizationSession * authSession = c.getAuthorizationSession();
_appendUserInfo(c, b, authSession);
BSONObj p = b.done();
if (static_cast<size_t>(p.objsize()) > MAX_PROFILE_DOC_SIZE_BYTES || isQueryObjTooBig) {
string small = p.toString(/*isArray*/false, /*full*/false);
warning() << "can't add full line to system.profile: " << small << endl;
// rebuild with limited info
BSONObjBuilder b(profileBufBuilder);
b.appendDate("ts", jsTime());
b.append("client", c.clientAddress() );
_appendUserInfo(c, b, authSession);
b.append("err", "profile line too large (max is 100KB)");
// should be much smaller but if not don't break anything
if (small.size() < MAX_PROFILE_DOC_SIZE_BYTES){
b.append("abbreviated", small);
}
p = b.done();
}
// write: not replicated
// get or create the profiling collection
NamespaceDetails *details = getOrCreateProfileCollection(db);
if (details) {
int len = p.objsize();
Record *r = theDataFileMgr.fast_oplog_insert(details, ns, len);
memcpy(getDur().writingPtr(r->data(), len), p.objdata(), len);
}
}
void profile(const Client& c, int op, CurOp& currentOp) {
// initialize with 1kb to start, to avoid realloc later
// doing this outside the dblock to improve performance
BufBuilder profileBufBuilder(1024);
try {
Lock::DBWrite lk( currentOp.getNS() );
if ( dbHolder()._isLoaded( nsToDatabase( currentOp.getNS() ) , dbpath ) ) {
Client::Context cx(currentOp.getNS(), dbpath);
_profile(c, currentOp, profileBufBuilder);
}
else {
mongo::log() << "note: not profiling because db went away - probably a close on: "
<< currentOp.getNS() << endl;
}
}
catch (const AssertionException& assertionEx) {
warning() << "Caught Assertion while trying to profile " << opToString(op)
<< " against " << currentOp.getNS()
<< ": " << assertionEx.toString() << endl;
}
}
NamespaceDetails* getOrCreateProfileCollection(Database *db, bool force, string* errmsg ) {
fassert(16372, db);
const char* profileName = db->profileName.c_str();
NamespaceDetails* details = db->namespaceIndex.details(profileName);
if (!details && (cmdLine.defaultProfile || force)) {
// system.profile namespace doesn't exist; create it
log() << "creating profile collection: " << profileName << endl;
string myerrmsg;
if (!userCreateNS(db->profileName.c_str(),
BSON("capped" << true << "size" << 1024 * 1024), myerrmsg , false)) {
myerrmsg = str::stream() << "could not create ns " << db->profileName << ": " << myerrmsg;
log() << myerrmsg << endl;
if ( errmsg )
*errmsg = myerrmsg;
return NULL;
}
details = db->namespaceIndex.details(profileName);
}
else if ( details && !details->isCapped() ) {
string myerrmsg = str::stream() << profileName << " exists but isn't capped";
log() << myerrmsg << endl;
if ( errmsg )
*errmsg = myerrmsg;
return NULL;
}
if (!details) {
// failed to get or create profile collection
static time_t last = time(0) - 10; // warn the first time
if( time(0) > last+10 ) {
log() << "profile: warning ns " << profileName << " does not exist" << endl;
last = time(0);
}
}
return details;
}
} // namespace mongo
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