diff options
| author | Anand Jain <Anand.Jain@oracle.com> | 2014-01-13 21:14:55 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-31 08:22:26 -0800 |
| commit | f920dbce8d8161fff30e3e75ebfc71e978d9bea4 (patch) | |
| tree | 2ca6561e3cd88062c327281d83c758f588055e60 /disk-io.c | |
| parent | b2e99e1819d967828edf149db5a203e59a40e379 (diff) | |
btrfs-progs: btrfsck operations should be exclusive
this patch will make btrfsck operations to open disk in exclusive mode,
so that mount will fail when btrfsck is running
Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'disk-io.c')
| -rw-r--r-- | disk-io.c | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -1057,6 +1057,7 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path, struct btrfs_fs_devices *fs_devices = NULL; struct extent_buffer *eb; int ret; + int oflags; if (sb_bytenr == 0) sb_bytenr = BTRFS_SUPER_INFO_OFFSET; @@ -1080,9 +1081,14 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path, fs_info->fs_devices = fs_devices; if (flags & OPEN_CTREE_WRITES) - ret = btrfs_open_devices(fs_devices, O_RDWR); + oflags = O_RDWR; else - ret = btrfs_open_devices(fs_devices, O_RDONLY); + oflags = O_RDONLY; + + if (flags & OPEN_CTREE_EXCLUSIVE) + oflags |= O_EXCL; + + ret = btrfs_open_devices(fs_devices, oflags); if (ret) goto out_devices; |