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/**
* Copyright (C) 2015 MongoDB 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 <string>
#include "mongo/bson/bsonelement.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/client/connpool.h"
#include "mongo/client/dbclientinterface.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/rpc/metadata.h"
#include "mongo/s/client/shard.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
class ClusterKillOpCommand : public Command {
public:
ClusterKillOpCommand() : Command("killOp") {}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool slaveOk() const final {
return true;
}
bool adminOnly() const final {
return true;
}
Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) final {
bool isAuthorized = AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forClusterResource(), ActionType::killop);
return isAuthorized ? Status::OK() : Status(ErrorCodes::Unauthorized, "Unauthorized");
}
bool run(OperationContext* txn,
const std::string& db,
BSONObj& cmdObj,
int options,
std::string& errmsg,
BSONObjBuilder& result) final {
// The format of op is shardid:opid
// This is different than the format passed to the mongod killOp command.
std::string opToKill;
uassertStatusOK(bsonExtractStringField(cmdObj, "op", &opToKill));
const auto opSepPos = opToKill.find(':');
uassert(28625,
str::stream() << "The op argument to killOp must be of the format shardid:opid"
<< " but found \""
<< opToKill
<< '"',
(opToKill.size() >= 3) && // must have at least N:N
(opSepPos != std::string::npos) && // must have ':' as separator
(opSepPos != 0) && // can't be :NN
(opSepPos != (opToKill.size() - 1))); // can't be NN:
auto shardIdent = opToKill.substr(0, opSepPos);
log() << "want to kill op: " << opToKill;
// Will throw if shard id is not found
auto shard = grid.shardRegistry()->getShard(txn, shardIdent);
if (!shard) {
return appendCommandStatus(
result,
Status(ErrorCodes::ShardNotFound,
str::stream() << "shard " << shardIdent << " does not exist"));
}
auto opId = std::stoi(opToKill.substr(opSepPos + 1));
// shardid is actually the opid - keeping for backwards compatibility.
result.append("shard", shardIdent);
result.append("shardid", opId);
ScopedDbConnection conn(shard->getConnString());
// intentionally ignore return value - that is how legacy killOp worked.
conn->runCommandWithMetadata(
"admin", "killOp", rpc::makeEmptyMetadata(), BSON("killOp" << 1 << "op" << opId));
conn.done();
// The original behavior of killOp on mongos is to always return success, regardless of
// whether the shard reported success or not.
return true;
}
} clusterKillOpCommand;
} // namespace
} // namespace mongo
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