tree a8e2a5e0fc58793ef9ce24ecd19834a3756c1e17
parent bd7d63c2ceaf737eeb21630a2b62fc5fe34dba29
author Liu Bo <bo.li.liu@oracle.com> 1505951418 -0600
committer David Sterba <dsterba@suse.com> 1506430403 +0200

Btrfs: fix kernel oops while reading compressed data

The kernel oops happens at

kernel BUG at fs/btrfs/extent_io.c:2104!
...
RIP: clean_io_failure+0x263/0x2a0 [btrfs]

It's showing that read-repair code is using an improper mirror index.
This is due to the fact that compression read's endio hasn't recorded
the failed mirror index in %cb->orig_bio.

With this, btrfs's read-repair can work properly on reading compressed
data.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reported-by: Paul Jones <paul@pauljones.id.au>
Tested-by: Paul Jones <paul@pauljones.id.au>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>