tree e2340e7e969bfb8a506ef193adaae243d9d65a08
parent 69f03f137a1cb1a5215bc9e64597bfdfcdf22fde
author Liu Bo <bo.li.liu@oracle.com> 1499805796 -0600
committer David Sterba <dsterba@suse.com> 1502892722 +0200

Btrfs: report errors when checksum is not found

When btrfs fails the checksum check, it'll fill the whole page with
"1".

However, if %csum_expected is 0 (which means there is no checksum), then
for some unknown reason, we just pretend that the read is correct, so
userspace would be confused about the dilemma that read is successful but
getting a page with all content being "1".

This can happen due to a bug in btrfs-convert.

This fixes it by always returning errors if checksum doesn't match.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>