projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
| 2 | // vim: ts=8 sw=2 smarttab | |
| 3 | /* | |
| 4 | * Ceph - scalable distributed file system | |
| 5 | * | |
| 6 | * Copyright (C) 2011 New Dream Network | |
| 7 | * | |
| 8 | * This is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License version 2.1, as published by the Free Software | |
| 11 | * Foundation. See file COPYING. | |
| 12 | * | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef CEPH_SYNC_FILESYSTEM_H | |
| 16 | #define CEPH_SYNC_FILESYSTEM_H | |
| 17 | ||
| 18 | #include <unistd.h> | |
| 19 | ||
| 20 | #if defined(__linux__) | |
| 21 | #include <sys/ioctl.h> | |
| 22 | #include <syscall.h> | |
| 23 | #include "os/fs/btrfs_ioctl.h" | |
| 24 | #endif | |
| 25 | ||
| 26 | inline int sync_filesystem(int fd) | |
| 27 | { | |
| 28 | /* On Linux, newer versions of glibc have a function called syncfs that | |
| 29 | * performs a sync on only one filesystem. If we don't have this call, we | |
| 30 | * have to fall back on sync(), which synchronizes every filesystem on the | |
| 31 | * computer. */ | |
| 32 | #ifdef HAVE_SYS_SYNCFS | |
| 33 | if (syncfs(fd) == 0) | |
| 34 | return 0; | |
| 35 | #elif defined(SYS_syncfs) | |
| 36 | if (syscall(SYS_syncfs, fd) == 0) | |
| 37 | return 0; | |
| 38 | #elif defined(__NR_syncfs) | |
| 39 | if (syscall(__NR_syncfs, fd) == 0) | |
| 40 | return 0; | |
| 41 | #endif | |
| 42 | ||
| 43 | #if defined(HAVE_SYS_SYNCFS) || defined(SYS_syncfs) || defined(__NR_syncfs) | |
| 44 | else if (errno == ENOSYS) { | |
| 45 | sync(); | |
| 46 | return 0; | |
| 47 | } else { | |
| 48 | return -errno; | |
| 49 | } | |
| 50 | #else | |
| 51 | sync(); | |
| 52 | return 0; | |
| 53 | #endif | |
| 54 | } | |
| 55 | ||
| 56 | #endif |