https://github.com/torvalds/linux
Revision c55a4319c4f2c3ba0a385b1ebc454fa283cfe920 authored by Boris Burkov on 23 February 2021, 18:22:32 UTC, committed by David Sterba on 02 March 2021, 15:55:55 UTC
The intended logic of the check is to catch cases where the desired free_space_tree setting doesn't match the mounted setting, and the remount is anything but ro->rw. However, it makes the mistake of checking equality on a masked integer (btrfs_test_opt) against a boolean (btrfs_fs_compat_ro). If you run the reproducer: $ mount -o space_cache=v2 dev mnt $ mount -o remount,ro mnt you would expect no warning, because the remount is not attempting to change the free space tree setting, but we do see the warning. To fix this, add explicit bool type casts to the condition. I tested a variety of transitions: sudo mount -o space_cache=v2 /dev/vg0/lv0 mnt/lol (fst enabled) mount -o remount,ro mnt/lol (no warning, no fst change) sudo mount -o remount,rw,space_cache=v1,clear_cache (no warning, ro->rw) sudo mount -o remount,rw,space_cache=v2 mnt (warning, rw->rw with change) sudo mount -o remount,ro mnt (no warning, no fst change) sudo mount -o remount,rw,space_cache=v2 mnt (no warning, no fst change) Reported-by: Chris Murphy <lists@colorremedies.com> CC: stable@vger.kernel.org # 5.11 Signed-off-by: Boris Burkov <boris@bur.io> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
1 parent 5011c5a
Tip revision: c55a4319c4f2c3ba0a385b1ebc454fa283cfe920 authored by Boris Burkov on 23 February 2021, 18:22:32 UTC
btrfs: fix spurious free_space_tree remount warning
btrfs: fix spurious free_space_tree remount warning
Tip revision: c55a431
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.cocciconfig | -rw-r--r-- | 59 bytes |
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COPYING | -rw-r--r-- | 496 bytes |
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Makefile | -rw-r--r-- | 62.7 KB |
README | -rw-r--r-- | 727 bytes |
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