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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::kStorage
#include "mongo/db/storage/storage_file_util.h"
#include <cerrno>
#include <cstring>
#ifdef __linux__
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#endif
#include <boost/filesystem/path.hpp>
#include "mongo/util/file.h"
#include "mongo/util/log.h"
namespace mongo {
Status fsyncFile(const boost::filesystem::path& path) {
File file;
file.open(path.string().c_str(), /*read-only*/ false, /*direct-io*/ false);
if (!file.is_open()) {
return {ErrorCodes::FileOpenFailed,
str::stream() << "Failed to open file " << path.string()};
}
file.fsync();
return Status::OK();
}
Status fsyncParentDirectory(const boost::filesystem::path& file) {
#ifdef __linux__ // this isn't needed elsewhere
if (!file.has_parent_path()) {
return {ErrorCodes::InvalidPath,
str::stream() << "Couldn't find parent directory for file: " << file.string()};
}
boost::filesystem::path dir = file.parent_path();
LOG(1) << "flushing directory " << dir.string();
int fd = ::open(dir.string().c_str(), O_RDONLY);
if (fd < 0) {
return {ErrorCodes::FileOpenFailed,
str::stream() << "Failed to open directory " << dir.string() << " for flushing: "
<< errnoWithDescription()};
}
if (fsync(fd) != 0) {
int e = errno;
if (e == EINVAL) {
warning() << "Could not fsync directory because this file system is not supported.";
} else {
close(fd);
return {ErrorCodes::OperationFailed,
str::stream() << "Failed to fsync directory '" << dir.string() << "': "
<< errnoWithDescription(e)};
}
}
close(fd);
#endif
return Status::OK();
}
Status fsyncRename(const boost::filesystem::path& source, const boost::filesystem::path& dest) {
if (boost::filesystem::exists(dest)) {
return {ErrorCodes::FileRenameFailed,
"Attempted to rename file to an existing file: " + dest.string()};
}
boost::system::error_code ec;
boost::filesystem::rename(source, dest, ec);
if (ec) {
return {ErrorCodes::FileRenameFailed,
str::stream() << "Error renaming data file from " << source.string() << " to "
<< dest.string()
<< ": "
<< ec.message()};
}
auto status = fsyncFile(dest);
if (!status.isOK()) {
return status;
}
status = fsyncParentDirectory(source);
if (!status.isOK()) {
return status;
}
status = fsyncParentDirectory(dest);
if (!status.isOK()) {
return status;
}
return Status::OK();
}
} // namespace mongo
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