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/**
* Copyright (C) 2013-2016 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/client/dbclientcursor.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_catalog_entry.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/catalog/index_create.h"
#include "mongo/db/catalog/rename_collection.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/rename_collection.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/ops/insert.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/service_context.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::min;
using std::string;
using std::stringstream;
namespace {
class CmdRenameCollection : public Command {
public:
CmdRenameCollection() : Command("renameCollection") {}
virtual bool adminOnly() const {
return true;
}
virtual bool slaveOk() const {
return false;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return rename_collection::checkAuthForRenameCollectionCommand(client, dbname, cmdObj);
}
virtual void help(stringstream& help) const {
help << " example: { renameCollection: foo.a, to: bar.b }";
}
static void dropCollection(OperationContext* txn, Database* db, StringData collName) {
WriteUnitOfWork wunit(txn);
if (db->dropCollection(txn, collName).isOK()) {
// ignoring failure case
wunit.commit();
}
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
const auto sourceNsElt = cmdObj[getName()];
const auto targetNsElt = cmdObj["to"];
uassert(ErrorCodes::TypeMismatch,
"'renameCollection' must be of type String",
sourceNsElt.type() == BSONType::String);
uassert(ErrorCodes::TypeMismatch,
"'to' must be of type String",
targetNsElt.type() == BSONType::String);
const NamespaceString source(sourceNsElt.valueStringData());
const NamespaceString target(targetNsElt.valueStringData());
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid source namespace: " << source.ns(),
source.isValid());
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid target namespace: " << target.ns(),
target.isValid());
if ((repl::getGlobalReplicationCoordinator()->getReplicationMode() !=
repl::ReplicationCoordinator::modeNone)) {
if (source.isOplog()) {
errmsg = "can't rename live oplog while replicating";
return false;
}
if (target.isOplog()) {
errmsg = "can't rename to live oplog while replicating";
return false;
}
}
if (source.isOplog() != target.isOplog()) {
errmsg = "If either the source or target of a rename is an oplog name, both must be";
return false;
}
Status sourceStatus = userAllowedWriteNS(source);
if (!sourceStatus.isOK()) {
errmsg = "error with source namespace: " + sourceStatus.reason();
return false;
}
Status targetStatus = userAllowedWriteNS(target);
if (!targetStatus.isOK()) {
errmsg = "error with target namespace: " + targetStatus.reason();
return false;
}
if (source.isSystemDotIndexes() || target.isSystemDotIndexes()) {
errmsg = "renaming system.indexes is not allowed";
return false;
}
return appendCommandStatus(result,
renameCollection(txn,
source,
target,
cmdObj["dropTarget"].trueValue(),
cmdObj["stayTemp"].trueValue()));
}
} cmdrenamecollection;
} // namespace
} // namespace mongo
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