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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.
*/
#include <string>
#include <vector>
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_compact.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/commands.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/curop.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/repl/replication_coordinator.h"
namespace mongo {
using std::string;
using std::stringstream;
class CompactCmd : public BasicCommand {
public:
bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool adminOnly() const override {
return false;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
Status checkAuthForOperation(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj) const override {
auto* as = AuthorizationSession::get(opCtx->getClient());
if (!as->isAuthorizedForActionsOnResource(parseResourcePattern(dbName, cmdObj),
ActionType::compact)) {
return {ErrorCodes::Unauthorized, "unauthorized"};
}
return Status::OK();
}
std::string help() const override {
return "compact collection\n"
"warning: this operation locks the database and is slow. you can cancel with "
"killOp()\n"
"{ compact : <collection_name>, [force:<bool>] }\n"
" force - allows to run on a replica set primary\n";
}
CompactCmd() : BasicCommand("compact") {}
bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
NamespaceString nss = CommandHelpers::parseNsCollectionRequired(dbName, cmdObj);
repl::ReplicationCoordinator* replCoord = repl::ReplicationCoordinator::get(opCtx);
uassert(ErrorCodes::IllegalOperation,
"will not run compact on an active replica set primary as this will slow down "
"other running operations. use force:true to force",
!replCoord->getMemberState().primary() || cmdObj["force"].trueValue());
// This command is internal to the storage engine and should not block oplog application.
ShouldNotConflictWithSecondaryBatchApplicationBlock noPBWMBlock(opCtx->lockState());
StatusWith<int64_t> status = compactCollection(opCtx, nss);
uassertStatusOK(status.getStatus());
int64_t bytesFreed = status.getValue();
if (bytesFreed < 0) {
// When compacting a collection that is actively being written to, it is possible that
// the collection is larger at the completion of compaction than when it started.
bytesFreed = 0;
}
result.appendNumber("bytesFreed", static_cast<long long>(bytesFreed));
return true;
}
};
static CompactCmd compactCmd;
} // namespace mongo
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