lb_roundup
h->udfs.avdp_len = lb_roundup(512, h->udfs.lbsize);
v->iud_len = lb_roundup(512, h->udfs.lbsize);
lb_roundup(512, h->udfs.lbsize);
lb_roundup(v->lvd_len, h->udfs.lbsize);
v->usd_len = lb_roundup(v->usd_len, h->udfs.lbsize);
mp_sz = lb_roundup(m->udm_spsz, h->udfs.lbsize);
h->udfs.lvid_len = lb_roundup(h->udfs.lvid_len,
fsds_len = lb_roundup(fsd_len, h->udfs.lbsize);
h->udfs.fsd_len = lb_roundup(512,