vdev_label_offset
off = vdev_label_offset(vd->v_psize, l, offset);
off = vdev_label_offset(vd->v_psize, l, o_phys);
if (vdev_label_offset(vd->v_psize, l, offset) + VDEV_PAD_SIZE != off)
off = vdev_label_offset(vd->v_psize, l, offset);
vdev_label_offset(psize, l, 0)) != sizeof (label->label)) {
extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
vdev_label_offset(vd->vdev_psize, l,
offset = vdev_label_offset(size, l, 0);
vdev_label_offset(vd->vdev_psize, l, offset),
vdev_label_offset(vd->vdev_psize, l, offset),
start = vdev_label_offset(vd->vdev_psize, label, start);
end = vdev_label_offset(vd->vdev_psize, label, end);