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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_SYNC_FILESYSTEM_H
#define CEPH_SYNC_FILESYSTEM_H
#include <unistd.h>
#if defined(__linux__)
#include <sys/ioctl.h>
#include <syscall.h>
#include "os/fs/btrfs_ioctl.h"
#endif
inline int sync_filesystem(int fd)
{
/* On Linux, newer versions of glibc have a function called syncfs that
* performs a sync on only one filesystem. If we don't have this call, we
* have to fall back on sync(), which synchronizes every filesystem on the
* computer. */
#ifdef HAVE_SYS_SYNCFS
if (syncfs(fd) == 0)
return 0;
#elif defined(SYS_syncfs)
if (syscall(SYS_syncfs, fd) == 0)
return 0;
#elif defined(__NR_syncfs)
if (syscall(__NR_syncfs, fd) == 0)
return 0;
#endif
#if defined(HAVE_SYS_SYNCFS) || defined(SYS_syncfs) || defined(__NR_syncfs)
else if (errno == ENOSYS) {
sync();
return 0;
} else {
return -errno;
}
#else
sync();
return 0;
#endif
}
#endif
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