> + * Zone Attributes > + */ > +enum blk_zone_attr { > + BLK_ZONE_ATTR_ZFC = 1 << 0, > + BLK_ZONE_ATTR_FZR = 1 << 1, > + BLK_ZONE_ATTR_RZR = 1 << 2, > + BLK_ZONE_ATTR_ZDEV = 1 << 7, > +}; I have no ^$^$#$%#% idea what this is supposed to be. If you add userspace ABIs you need to document them in detail. Until I've seen that documentation I can't even comment if they make sense.