[PATCH STABLE 5.10 0/2] btrfs: raid56: backports to reduce corruption

[Qu Wenruo <wqu@suse.com>]

This is the backport for v5.10.x stable branch.

The full explananation can be found here:
https://lore.kernel.org/linux-btrfs/cover.1660891713.git.wqu@suse.com/

Difference between v5.10.x and v5.15.x backports:

- Naming change in btrfs_io_contrl
  In v5.15, we don't have the btrfs_io_contrl rename, thus only
  btrfs_bio.

- Missing btrfs_fs_info::sectorsize_bits
  Since RAID56 doesn't support anything but PAGE_SIZE == sectorsize
  (until v5.19+), here we just use PAGE_SHIFT.

Another thing related to v5.10.x testing is, there are some lockdep
assert triggered related to uuid_mutex.

I'm not 100% sure, but at least RAID56 code is not touching that mutex,
thus I guess it's some other problems.

Qu Wenruo (2):
  btrfs: only write the sectors in the vertical stripe which has data
    stripes
  btrfs: raid56: don't trust any cached sector in
    __raid56_parity_recover()

 fs/btrfs/raid56.c | 74 ++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 57 insertions(+), 17 deletions(-)

-- 
2.37.1