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/*
* Copyright (C) 2012 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 <vector>
#include "mongo/base/init.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/commands.h"
#include "mongo/util/fail_point_service.h"
#include "mongo/util/log.h"
namespace mongo {
using std::string;
using std::stringstream;
/**
* Command for modifying installed fail points.
*
* Format
* {
* configureFailPoint: <string>, // name of the fail point.
* mode: <string|Object>, // the new mode to set. Can have one of the
* following format:
*
* 1. 'off' - disable fail point.
* 2. 'alwaysOn' - fail point is always active.
* 3. { activationProbability: <n> } - n should be a double between 0 and 1,
* representing the probability that the fail point will fire. 0 means never,
* 1 means (nearly) always.
* 4. { times: <n> } - n should be positive and within the range of a 32 bit
* signed integer and this is the number of passes on the fail point will
* remain activated.
*
* data: <Object> // optional arbitrary object to store.
* }
*/
class FaultInjectCmd : public Command {
public:
FaultInjectCmd() : Command("configureFailPoint") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual bool adminOnly() const {
return true;
}
// No auth needed because it only works when enabled via command line.
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {}
virtual void help(stringstream& h) const {
h << "modifies the settings of a fail point";
}
bool run(OperationContext* opCtx,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
const string failPointName(cmdObj.firstElement().str());
FailPointRegistry* registry = getGlobalFailPointRegistry();
FailPoint* failPoint = registry->getFailPoint(failPointName);
if (failPoint == NULL) {
errmsg = failPointName + " not found";
return false;
}
FailPoint::Mode mode;
FailPoint::ValType val;
BSONObj data;
std::tie(mode, val, data) = uassertStatusOK(FailPoint::parseBSON(cmdObj));
failPoint->setMode(mode, val, data);
warning() << "failpoint: " << failPointName << " set to: " << failPoint->toBSON();
return true;
}
};
MONGO_INITIALIZER(RegisterFaultInjectCmd)(InitializerContext* context) {
if (Command::testCommandsEnabled) {
// Leaked intentionally: a Command registers itself when constructed.
new FaultInjectCmd();
}
return Status::OK();
}
}
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