• Omar Sandoval's avatar
    Btrfs: add RAID 5/6 BTRFS_RBIO_REBUILD_MISSING operation · b4ee1782
    Omar Sandoval authored
    The current RAID 5/6 recovery code isn't quite prepared to handle
    missing devices. In particular, it expects a bio that we previously
    attempted to use in the read path, meaning that it has valid pages
    allocated. However, missing devices have a NULL blkdev, and we can't
    call bio_add_page() on a bio with a NULL blkdev. We could do manual
    manipulation of bio->bi_io_vec, but that's pretty gross. So instead, add
    a separate path that allows us to manually add pages to the rbio.
    Signed-off-by: default avatarOmar Sandoval <osandov@fb.com>
    Signed-off-by: default avatarChris Mason <clm@fb.com>
raid56.h 2.29 KB