| commit | b772a86ea6d932ac29d5e50e67c977653c832f8a | [log] [tgz] |
|---|---|---|
| author | Li Zefan <lizf@cn.fujitsu.com> | Mon Nov 28 16:43:00 2011 +0800 |
| committer | David Sterba <dsterba@suse.cz> | Wed Nov 30 18:46:05 2011 +0100 |
| tree | c142daf34c910b496ce578dfb391a8ebd929652e | |
| parent | ece7d20e8be6730fbb29f4550de6b19b1a3a9387 [diff] |
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>