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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/db/audit.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/kill_op_cmd_base.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 KillOpCmdBase {
public:
bool run(OperationContext* opCtx,
const std::string& db,
const BSONObj& cmdObj,
BSONObjBuilder& result) final {
BSONElement element = cmdObj.getField("op");
uassert(50759, "Did not provide \"op\" field", element.ok());
if (isKillingLocalOp(element)) {
const unsigned int opId = KillOpCmdBase::parseOpId(cmdObj);
killLocalOperation(opCtx, opId);
// killOp always reports success once past the auth check.
return true;
} else if (element.type() == BSONType::String) {
// It's a string. Should be of the form shardid:opid.
return _killShardOperation(opCtx, element.str(), result);
}
uasserted(50760,
str::stream() << "\"op\" field was of unsupported type " << element.type());
}
private:
static bool _killShardOperation(OperationContext* opCtx,
const std::string& opToKill,
BSONObjBuilder& result) {
// The format of op is shardid:opid
// This is different than the format passed to the mongod killOp command.
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: " << redact(opToKill);
// Will throw if shard id is not found
auto shardStatus = Grid::get(opCtx)->shardRegistry()->getShard(opCtx, shardIdent);
uassertStatusOK(shardStatus.getStatus());
auto shard = shardStatus.getValue();
int opId;
uassertStatusOK(parseNumberFromStringWithBase(opToKill.substr(opSepPos + 1), 10, &opId));
// 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->runCommand(OpMsgRequest::fromDBAndBody("admin", 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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