UDF_BLK_MAPPED
if (*err || !(map.oflags & UDF_BLK_MAPPED))
map->oflags |= UDF_BLK_MAPPED;
if (map.oflags & UDF_BLK_MAPPED) {
map->oflags = UDF_BLK_MAPPED;
map->oflags = UDF_BLK_NEW | UDF_BLK_MAPPED;