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|
/* commands.cpp
db "commands" (sent via db.$cmd.findOne(...))
*/
/* 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::kCommand
#include "mongo/platform/basic.h"
#include "mongo/db/commands.h"
#include <string>
#include <vector>
#include "mongo/bson/mutable/document.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/client.h"
#include "mongo/db/get_status_from_command_result.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/server_parameters.h"
#include "mongo/util/log.h"
namespace mongo {
using logger::LogComponent;
Command::CommandMap* Command::_commandsByBestName;
Command::CommandMap* Command::_webCommands;
Command::CommandMap* Command::_commands;
int Command::testCommandsEnabled = 0;
Counter64 Command::unknownCommands;
static ServerStatusMetricField<Counter64> displayUnknownCommands( "commands.<UNKNOWN>",
&Command::unknownCommands );
namespace {
ExportedServerParameter<int> testCommandsParameter(ServerParameterSet::getGlobal(),
"enableTestCommands",
&Command::testCommandsEnabled,
true,
false);
}
string Command::parseNsFullyQualified(const string& dbname, const BSONObj& cmdObj) const {
BSONElement first = cmdObj.firstElement();
uassert(17005,
mongoutils::str::stream() << "Main argument to " << first.fieldNameStringData() <<
" must be a fully qualified namespace string. Found: " <<
first.toString(false),
first.type() == mongo::String &&
NamespaceString::validCollectionComponent(first.valuestr()));
return first.String();
}
string Command::parseNsCollectionRequired(const string& dbname, const BSONObj& cmdObj) const {
// Accepts both BSON String and Symbol for collection name per SERVER-16260
// TODO(kangas) remove Symbol support in MongoDB 3.0 after Ruby driver audit
BSONElement first = cmdObj.firstElement();
uassert(17009,
"no collection name specified",
first.canonicalType() == canonicalizeBSONType(mongo::String)
&& first.valuestrsize() > 0);
std::string coll = first.valuestr();
return dbname + '.' + coll;
}
/*virtual*/ string Command::parseNs(const string& dbname, const BSONObj& cmdObj) const {
BSONElement first = cmdObj.firstElement();
if (first.type() != mongo::String)
return dbname;
string coll = cmdObj.firstElement().valuestr();
#if defined(CLC)
DEV if( mongoutils::str::startsWith(coll, dbname+'.') ) {
log() << "DEBUG parseNs Command's collection name looks like it includes the db name\n"
<< dbname << '\n'
<< coll << '\n'
<< cmdObj.toString() << endl;
dassert(false);
}
#endif
return dbname + '.' + coll;
}
ResourcePattern Command::parseResourcePattern(const std::string& dbname,
const BSONObj& cmdObj) const {
std::string ns = parseNs(dbname, cmdObj);
if (ns.find('.') == std::string::npos) {
return ResourcePattern::forDatabaseName(ns);
}
return ResourcePattern::forExactNamespace(NamespaceString(ns));
}
void Command::htmlHelp(stringstream& ss) const {
string helpStr;
{
stringstream h;
help(h);
helpStr = h.str();
}
ss << "\n<tr><td>";
bool web = _webCommands->find(name) != _webCommands->end();
if( web ) ss << "<a href=\"/" << name << "?text=1\">";
ss << name;
if( web ) ss << "</a>";
ss << "</td>\n";
ss << "<td>";
if (isWriteCommandForConfigServer()) {
ss << "W ";
}
else {
ss << "R ";
}
if( slaveOk() )
ss << "S ";
if( adminOnly() )
ss << "A";
ss << "</td>";
ss << "<td>";
if( helpStr != "no help defined" ) {
const char *p = helpStr.c_str();
while( *p ) {
if( *p == '<' ) {
ss << "<";
p++; continue;
}
else if( *p == '{' )
ss << "<code>";
else if( *p == '}' ) {
ss << "}</code>";
p++;
continue;
}
if( strncmp(p, "http:", 5) == 0 ) {
ss << "<a href=\"";
const char *q = p;
while( *q && *q != ' ' && *q != '\n' )
ss << *q++;
ss << "\">";
q = p;
if( str::startsWith(q, "http://www.mongodb.org/display/") )
q += 31;
while( *q && *q != ' ' && *q != '\n' ) {
ss << (*q == '+' ? ' ' : *q);
q++;
if( *q == '#' )
while( *q && *q != ' ' && *q != '\n' ) q++;
}
ss << "</a>";
p = q;
continue;
}
if( *p == '\n' ) ss << "<br>";
else ss << *p;
p++;
}
}
ss << "</td>";
ss << "</tr>\n";
}
Command::Command(StringData _name, bool web, StringData oldName) :
name(_name.toString()),
_commandsExecutedMetric("commands."+ _name.toString()+".total", &_commandsExecuted),
_commandsFailedMetric("commands."+ _name.toString()+".failed", &_commandsFailed) {
// register ourself.
if ( _commands == 0 )
_commands = new CommandMap();
if( _commandsByBestName == 0 )
_commandsByBestName = new CommandMap();
Command*& c = (*_commands)[name];
if ( c )
log() << "warning: 2 commands with name: " << _name << endl;
c = this;
(*_commandsByBestName)[name] = this;
if( web ) {
if( _webCommands == 0 )
_webCommands = new CommandMap();
(*_webCommands)[name] = this;
}
if( !oldName.empty() )
(*_commands)[oldName.toString()] = this;
}
void Command::help( stringstream& help ) const {
help << "no help defined";
}
std::vector<BSONObj> Command::stopIndexBuilds(OperationContext* opCtx,
Database* db,
const BSONObj& cmdObj) {
return std::vector<BSONObj>();
}
Command* Command::findCommand( const StringData& name ) {
CommandMap::const_iterator i = _commands->find( name );
if ( i == _commands->end() )
return 0;
return i->second;
}
bool Command::appendCommandStatus(BSONObjBuilder& result, const Status& status) {
appendCommandStatus(result, status.isOK(), status.reason());
BSONObj tmp = result.asTempObj();
if (!status.isOK() && !tmp.hasField("code")) {
result.append("code", status.code());
}
return status.isOK();
}
void Command::appendCommandStatus(BSONObjBuilder& result, bool ok, const std::string& errmsg) {
BSONObj tmp = result.asTempObj();
bool have_ok = tmp.hasField("ok");
bool have_errmsg = tmp.hasField("errmsg");
if (!have_ok)
result.append( "ok" , ok ? 1.0 : 0.0 );
if (!ok && !have_errmsg) {
result.append("errmsg", errmsg);
}
}
Status Command::getStatusFromCommandResult(const BSONObj& result) {
return mongo::getStatusFromCommandResult(result);
}
Status Command::parseCommandCursorOptions(const BSONObj& cmdObj,
long long defaultBatchSize,
long long* batchSize) {
invariant(batchSize);
*batchSize = defaultBatchSize;
BSONElement cursorElem = cmdObj["cursor"];
if (cursorElem.eoo()) {
return Status::OK();
}
if (cursorElem.type() != mongo::Object) {
return Status(ErrorCodes::TypeMismatch, "cursor field must be missing or an object");
}
BSONObj cursor = cursorElem.embeddedObject();
BSONElement batchSizeElem = cursor["batchSize"];
if (batchSizeElem.eoo()) {
if (!cursor.isEmpty()) {
return Status(ErrorCodes::BadValue,
"cursor object can't contain fields other than batchSize");
}
return Status::OK();
}
if (!batchSizeElem.isNumber()) {
return Status(ErrorCodes::TypeMismatch, "cursor.batchSize must be a number");
}
// This can change in the future, but for now all negatives are reserved.
if (batchSizeElem.numberLong() < 0) {
return Status(ErrorCodes::BadValue, "cursor.batchSize must not be negative");
}
*batchSize = batchSizeElem.numberLong();
return Status::OK();
}
void Command::appendCursorResponseObject(long long cursorId,
StringData cursorNamespace,
BSONArray firstBatch,
BSONObjBuilder* builder) {
BSONObjBuilder cursorObj(builder->subobjStart("cursor"));
cursorObj.append("id", cursorId);
cursorObj.append("ns", cursorNamespace);
cursorObj.append("firstBatch", firstBatch);
cursorObj.done();
}
Status Command::checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
std::vector<Privilege> privileges;
this->addRequiredPrivileges(dbname, cmdObj, &privileges);
if (client->getAuthorizationSession()->isAuthorizedForPrivileges(privileges))
return Status::OK();
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
void Command::redactForLogging(mutablebson::Document* cmdObj) {}
BSONObj Command::getRedactedCopyForLogging(const BSONObj& cmdObj) {
namespace mmb = mutablebson;
mmb::Document cmdToLog(cmdObj, mmb::Document::kInPlaceDisabled);
redactForLogging(&cmdToLog);
BSONObjBuilder bob;
cmdToLog.writeTo(&bob);
return bob.obj();
}
void Command::logIfSlow( const Timer& timer, const string& msg ) {
int ms = timer.millis();
if (ms > serverGlobalParams.slowMS) {
log() << msg << " took " << ms << " ms." << endl;
}
}
static Status _checkAuthorizationImpl(Command* c,
ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj,
bool fromRepl) {
namespace mmb = mutablebson;
if ( c->adminOnly() && ! fromRepl && dbname != "admin" ) {
return Status(ErrorCodes::Unauthorized, str::stream() << c->name <<
" may only be run against the admin database.");
}
if (client->getAuthorizationSession()->getAuthorizationManager().isAuthEnabled()) {
Status status = c->checkAuthForCommand(client, dbname, cmdObj);
if (status == ErrorCodes::Unauthorized) {
mmb::Document cmdToLog(cmdObj, mmb::Document::kInPlaceDisabled);
c->redactForLogging(&cmdToLog);
return Status(ErrorCodes::Unauthorized,
str::stream() << "not authorized on " << dbname <<
" to execute command " << cmdToLog.toString());
}
if (!status.isOK()) {
return status;
}
}
else if (c->adminOnly() &&
c->localHostOnlyIfNoAuth(cmdObj) &&
!client->getIsLocalHostConnection()) {
return Status(ErrorCodes::Unauthorized, str::stream() << c->name <<
" must run from localhost when running db without auth");
}
return Status::OK();
}
Status Command::_checkAuthorization(Command* c,
ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj,
bool fromRepl) {
namespace mmb = mutablebson;
Status status = _checkAuthorizationImpl(c, client, dbname, cmdObj, fromRepl);
if (!status.isOK()) {
log(LogComponent::kAccessControl) << status << std::endl;
}
audit::logCommandAuthzCheck(client,
dbname,
cmdObj,
c,
status.code());
return status;
}
}
#include "mongo/client/connpool.h"
namespace mongo {
extern DBConnectionPool pool;
// This is mainly used by the internal writes using write commands.
extern DBConnectionPool shardConnectionPool;
class PoolFlushCmd : public Command {
public:
PoolFlushCmd() : Command( "connPoolSync" , false , "connpoolsync" ) {}
virtual void help( stringstream &help ) const { help<<"internal"; }
virtual bool isWriteCommandForConfigServer() const { return false; }
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::connPoolSync);
out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
}
virtual bool run(OperationContext* txn, const string&, mongo::BSONObj&, int, std::string&, mongo::BSONObjBuilder& result, bool) {
shardConnectionPool.flush();
pool.flush();
return true;
}
virtual bool slaveOk() const {
return true;
}
} poolFlushCmd;
class PoolStats : public Command {
public:
PoolStats() : Command( "connPoolStats" ) {}
virtual void help( stringstream &help ) const { help<<"stats about connection pool"; }
virtual bool isWriteCommandForConfigServer() const { return false; }
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::connPoolStats);
out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
}
virtual bool run(OperationContext* txn, const string&, mongo::BSONObj&, int, std::string&, mongo::BSONObjBuilder& result, bool) {
pool.appendInfo( result );
result.append( "numDBClientConnection" , DBClientConnection::getNumConnections() );
result.append( "numAScopedConnection" , AScopedConnection::getNumConnections() );
return true;
}
virtual bool slaveOk() const {
return true;
}
} poolStatsCmd;
} // namespace mongo
|