| commit | f106e82caaa0d943e47cacc184f5b40d538e0044 | |
| author | Li Zefan <lizf@cn.fujitsu.com> | |
| Tue, 7 Dec 2010 01:51:26 +0000 (7 01:51 +0000) | ||
| committer | Chris Mason <chris.mason@oracle.com> | |
| Fri, 10 Dec 2010 21:29:10 +0000 (10 16:29 -0500) | ||
| tree | 5e8b6c5e0b0b35c65ed509029cda85bd54a8aab8 | treesnapshot (tar.gz zip) |
| parent | 75eaa0e22c055e38982df267d0f84cc510ba38bf | commitdiff |
Btrfs: Fix a crash when mounting a subvolume
We should drop dentry before deactivating the superblock, otherwise
we can hit this bug:
BUG: Dentry f349a690{i=100,n=/} still in use (1) [unmount of btrfs loop1]
...
Steps to reproduce the bug:
# mount /dev/loop1 /mnt
# mkdir save
# btrfs subvolume snapshot /mnt save/snap1
# umount /mnt
# mount -o subvol=save/snap1 /dev/loop1 /mnt
(crash)
Reported-by: Michael Niederle <mniederle@gmx.at>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
We should drop dentry before deactivating the superblock, otherwise
we can hit this bug:
BUG: Dentry f349a690{i=100,n=/} still in use (1) [unmount of btrfs loop1]
...
Steps to reproduce the bug:
# mount /dev/loop1 /mnt
# mkdir save
# btrfs subvolume snapshot /mnt save/snap1
# umount /mnt
# mount -o subvol=save/snap1 /dev/loop1 /mnt
(crash)
Reported-by: Michael Niederle <mniederle@gmx.at>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| fs/btrfs/super.c | diffblobblamehistory |