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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/client/read_preference.h"
#include "mongo/client/remote_command_targeter.h"
#include "mongo/db/commands.h"
#include "mongo/s/client/shard.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
namespace mongo {
namespace {
class FsyncCommand : public Command {
public:
FsyncCommand() : Command("fsync", false, "fsync") {}
virtual bool slaveOk() const {
return true;
}
virtual bool adminOnly() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void help(std::stringstream& help) const {
help << "invoke fsync on all shards belonging to the cluster";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::fsync);
out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
}
virtual bool run(OperationContext* opCtx,
const std::string& dbname,
BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& result) {
if (cmdObj["lock"].trueValue()) {
errmsg = "can't do lock through mongos";
return false;
}
BSONObjBuilder sub;
bool ok = true;
int numFiles = 0;
std::vector<ShardId> shardIds;
grid.shardRegistry()->getAllShardIds(&shardIds);
for (const ShardId& shardId : shardIds) {
auto shardStatus = grid.shardRegistry()->getShard(opCtx, shardId);
if (!shardStatus.isOK()) {
continue;
}
const auto s = shardStatus.getValue();
auto response = uassertStatusOK(s->runCommandWithFixedRetryAttempts(
opCtx,
ReadPreferenceSetting{ReadPreference::PrimaryOnly},
"admin",
BSON("fsync" << 1),
Shard::RetryPolicy::kIdempotent));
uassertStatusOK(response.commandStatus);
BSONObj x = std::move(response.response);
sub.append(s->getId().toString(), x);
if (!x["ok"].trueValue()) {
ok = false;
errmsg = x["errmsg"].String();
}
numFiles += x["numFiles"].numberInt();
}
result.append("numFiles", numFiles);
result.append("all", sub.obj());
return ok;
}
} clusterFsyncCmd;
} // namespace
} // namespace mongo
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