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authorLi Zefan <lizf@cn.fujitsu.com>2011-11-28 16:43:00 +0800
committerDavid Sterba <dsterba@suse.cz>2011-11-30 18:46:05 +0100
commitb772a86ea6d932ac29d5e50e67c977653c832f8a (patch)
treec142daf34c910b496ce578dfb391a8ebd929652e /fs/btrfs/free-space-cache.c
parentece7d20e8be6730fbb29f4550de6b19b1a3a9387 (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>
Diffstat (limited to 'fs/btrfs/free-space-cache.c')
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