• Qu Wenruo's avatar
    btrfs: raid56: introduce btrfs_raid_bio::bio_sectors · 00425dd9
    Qu Wenruo authored
    This new member is going to fully replace bio_pages in the future, but
    for now let's keep them co-exist, until the full switch is done.
    
    Currently cache_rbio_pages() and index_rbio_pages() will also populate
    the new array.
    
    And cache_rbio_pages() need to record which sectors are uptodate, so we
    also need to introduce sector_ptr::uptodate bit.
    
    To avoid extra memory usage, we let the new @uptodate bit to share bits
    with @pgoff.  Now pgoff only has at most 31 bits, which is already more
    than enough, as even for 256K page size, we only need 18 bits.
    Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
    Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
    Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
    00425dd9
raid56.c 69.8 KB