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| author | Miao Xie <miaox@cn.fujitsu.com> | 2012-10-22 11:39:53 +0000 |
|---|---|---|
| committer | Josef Bacik <josef@toxicpanda.com> | 2013-01-14 13:52:32 -0500 |
| commit | 5c39da5b6ca23e68e7acea7f4c01470383475214 (patch) | |
| tree | 3079d0eccddbdb689879eb6d71ded878806da08c /fs | |
| parent | d86e56cf7d3669dd292012ac82b986bd1573b6cc (diff) | |
| download | linux-stable-5c39da5b6ca23e68e7acea7f4c01470383475214.tar.gz linux-stable-5c39da5b6ca23e68e7acea7f4c01470383475214.tar.bz2 linux-stable-5c39da5b6ca23e68e7acea7f4c01470383475214.zip | |
Btrfs: do not delete a subvolume which is in a R/O subvolume
Step to reproduce:
# mkfs.btrfs <disk>
# mount <disk> <mnt>
# btrfs sub create <mnt>/subv0
# btrfs sub snap <mnt> <mnt>/subv0/snap0
# change <mnt>/subv0 from R/W to R/O
# btrfs sub del <mnt>/subv0/snap0
We deleted the snapshot successfully. I think we should not be able to delete
the snapshot since the parent subvolume is R/O.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index dd8e3448fe8f..5a72896bd769 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2095,13 +2095,13 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, err = inode_permission(inode, MAY_WRITE | MAY_EXEC); if (err) goto out_dput; - - /* check if subvolume may be deleted by a non-root user */ - err = btrfs_may_delete(dir, dentry, 1); - if (err) - goto out_dput; } + /* check if subvolume may be deleted by a user */ + err = btrfs_may_delete(dir, dentry, 1); + if (err) + goto out_dput; + if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) { err = -EINVAL; goto out_dput; |