Pass the btrfs_bio instead of the plain bio to btrfs_repair_one_sector,
and remove the start and failed_mirror arguments in favor of deriving
them from the btrfs_bio.  For this to work ensure that the file_offset
field is also initialized for buffered I/O.
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Reviewed-by: NBoris Burkov <boris@bur.io>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>