Function vdev_label_offset

freebsd/contrib/openzfs/module/zfs/vdev_label.c:160–168

* Basic routines to read and write from a vdev label. * Used throughout the rest of this file. */

 * Used throughout the rest of this file.
 */
uint64_t
vdev_label_offset(uint64_t psize, int l, uint64_t offset)
{
	ASSERT(offset < sizeof (vdev_label_t));
	ASSERT(P2PHASE_TYPED(psize, sizeof (vdev_label_t), uint64_t) == 0);

	return (offset + l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ?
	    0 : psize - VDEV_LABELS * sizeof (vdev_label_t)));
}

/*
 * Returns back the vdev label associated with the passed in offset.