libbtrfsutil/filesystem.c

   1 /*
   2  * Copyright (C) 2018 Facebook
   3  *
   4  * This file is part of libbtrfsutil.
   5  *
   6  * libbtrfsutil is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * libbtrfsutil is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with libbtrfsutil.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <unistd.h>
  23 #include <sys/ioctl.h>
  24
  25 #include "btrfsutil_internal.h"
  26
  27 PUBLIC enum btrfs_util_error btrfs_util_sync(const char *path)
  28 {
  29         enum btrfs_util_error err;
  30         int fd;
  31
  32         fd = open(path, O_RDONLY);
  33         if (fd == -1)
  34                 return BTRFS_UTIL_ERROR_OPEN_FAILED;
  35
  36         err = btrfs_util_sync_fd(fd);
  37         SAVE_ERRNO_AND_CLOSE(fd);
  38         return err;
  39 }
  40
  41 PUBLIC enum btrfs_util_error btrfs_util_sync_fd(int fd)
  42 {
  43         int ret;
  44
  45         ret = ioctl(fd, BTRFS_IOC_SYNC, NULL);
  46         if (ret == -1)
  47                 return BTRFS_UTIL_ERROR_SYNC_FAILED;
  48
  49         return BTRFS_UTIL_OK;
  50 }
  51
  52 PUBLIC enum btrfs_util_error btrfs_util_start_sync(const char *path,
  53                                                    uint64_t *transid)
  54 {
  55         enum btrfs_util_error err;
  56         int fd;
  57
  58         fd = open(path, O_RDONLY);
  59         if (fd == -1)
  60                 return BTRFS_UTIL_ERROR_OPEN_FAILED;
  61
  62         err = btrfs_util_start_sync_fd(fd, transid);
  63         SAVE_ERRNO_AND_CLOSE(fd);
  64         return err;
  65 }
  66
  67 PUBLIC enum btrfs_util_error btrfs_util_start_sync_fd(int fd, uint64_t *transid)
  68 {
  69         int ret;
  70
  71         ret = ioctl(fd, BTRFS_IOC_START_SYNC, transid);
  72         if (ret == -1)
  73                 return BTRFS_UTIL_ERROR_START_SYNC_FAILED;
  74
  75         return BTRFS_UTIL_OK;
  76 }
  77
  78 PUBLIC enum btrfs_util_error btrfs_util_wait_sync(const char *path,
  79                                                   uint64_t transid)
  80 {
  81         enum btrfs_util_error err;
  82         int fd;
  83
  84         fd = open(path, O_RDONLY);
  85         if (fd == -1)
  86                 return BTRFS_UTIL_ERROR_OPEN_FAILED;
  87
  88         err = btrfs_util_wait_sync_fd(fd, transid);
  89         SAVE_ERRNO_AND_CLOSE(fd);
  90         return err;
  91 }
  92
  93 PUBLIC enum btrfs_util_error btrfs_util_wait_sync_fd(int fd, uint64_t transid)
  94 {
  95         int ret;
  96
  97         ret = ioctl(fd, BTRFS_IOC_WAIT_SYNC, &transid);
  98         if (ret == -1)
  99                 return BTRFS_UTIL_ERROR_WAIT_SYNC_FAILED;
 100
 101         return BTRFS_UTIL_OK;
 102 }