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/**
* Copyright (C) 2008 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/base/status.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/resource_pattern.h"
#include "mongo/db/catalog/document_validation.h"
#include "mongo/db/cloner.h"
#include "mongo/db/commands.h"
#include "mongo/db/jsobj.h"
#include "mongo/s/grid.h"
namespace {
using namespace mongo;
using std::set;
using std::string;
using std::stringstream;
/* Usage:
mydb.$cmd.findOne( { clone: "fromhost" } );
Note: doesn't work with authentication enabled, except as internal operation or for
old-style users for backwards compatibility.
*/
class CmdClone : public Command {
public:
CmdClone() : Command("clone") {}
virtual bool slaveOk() const {
return false;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual void help(stringstream& help) const {
help << "clone this database from an instance of the db on another host\n";
help << "{clone: \"host13\"[, slaveOk: <bool>]}";
}
virtual Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
ActionSet actions;
actions.addAction(ActionType::insert);
actions.addAction(ActionType::createIndex);
if (shouldBypassDocumentValidationForCommand(cmdObj)) {
actions.addAction(ActionType::bypassDocumentValidation);
}
if (!AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forDatabaseName(dbname), actions)) {
return Status(ErrorCodes::Unauthorized, "Unauthorized");
}
return Status::OK();
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
boost::optional<DisableDocumentValidation> maybeDisableValidation;
if (shouldBypassDocumentValidationForCommand(cmdObj)) {
maybeDisableValidation.emplace(txn);
}
string from = cmdObj.getStringField("clone");
if (from.empty())
return false;
CloneOptions opts;
opts.fromDB = dbname;
opts.slaveOk = cmdObj["slaveOk"].trueValue();
// See if there's any collections we should ignore
if (cmdObj["collsToIgnore"].type() == Array) {
BSONObjIterator it(cmdObj["collsToIgnore"].Obj());
while (it.more()) {
BSONElement e = it.next();
if (e.type() == String) {
opts.collsToIgnore.insert(e.String());
}
}
}
set<string> clonedColls;
ScopedTransaction transaction(txn, MODE_IX);
Lock::DBLock dbXLock(txn->lockState(), dbname, MODE_X);
Cloner cloner;
Status status = cloner.copyDb(txn, dbname, from, opts, &clonedColls);
BSONArrayBuilder barr;
barr.append(clonedColls);
result.append("clonedColls", barr.arr());
return appendCommandStatus(result, status);
}
} cmdClone;
} // namespace
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