• NeilBrown's avatar
    md/bitmap: prepare for storing write-intent-bitmap via dm-dirty-log. · e384e585
    NeilBrown authored
    This allows md/raid5 to fully work as a dm target.
    
    Normally md uses a 'filemap' which contains a list of pages of bits
    each of which may be written separately.
    dm-log uses and all-or-nothing approach to writing the log, so
    when using a dm-log, ->filemap is NULL and the flags normally stored
    in filemap_attr are stored in ->logattrs instead.
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    e384e585
md.h 17.1 KB