| commit | b772a86ea6d932ac29d5e50e67c977653c832f8a | |
| author | Li Zefan <lizf@cn.fujitsu.com> | |
| Mon, 28 Nov 2011 08:43:00 +0000 (28 16:43 +0800) | ||
| committer | David Sterba <dsterba@suse.cz> | |
| Wed, 30 Nov 2011 17:46:05 +0000 (30 18:46 +0100) | ||
| tree | c142daf34c910b496ce578dfb391a8ebd929652e | treesnapshot (tar.gz zip) |
| parent | ece7d20e8be6730fbb29f4550de6b19b1a3a9387 | commitdiff |
Btrfs: fix oops when calling statfs on readonly device
To reproduce this bug:
# dd if=/dev/zero of=img bs=1M count=256
# mkfs.btrfs img
# losetup -r /dev/loop1 img
# mount /dev/loop1 /mnt
OOPS!!
It triggered BUG_ON(!nr_devices) in btrfs_calc_avail_data_space().
To fix this, instead of checking write-only devices, we check all open
deivces:
# df -h /dev/loop1
Filesystem Size Used Avail Use% Mounted on
/dev/loop1 250M 28K 238M 1% /mnt
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
To reproduce this bug:
# dd if=/dev/zero of=img bs=1M count=256
# mkfs.btrfs img
# losetup -r /dev/loop1 img
# mount /dev/loop1 /mnt
OOPS!!
It triggered BUG_ON(!nr_devices) in btrfs_calc_avail_data_space().
To fix this, instead of checking write-only devices, we check all open
deivces:
# df -h /dev/loop1
Filesystem Size Used Avail Use% Mounted on
/dev/loop1 250M 28K 238M 1% /mnt
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
| fs/btrfs/super.c | diffblobblamehistory |