Function vdev_close

freebsd/contrib/openzfs/module/zfs/vdev.c:2349–2382

* Close a virtual device. */

 * Close a virtual device.
 */
void
vdev_close(vdev_t *vd)
{
	vdev_t *pvd = vd->vdev_parent;
	spa_t *spa __maybe_unused = vd->vdev_spa;

	ASSERT(vd != NULL);
	ASSERT(vd->vdev_open_thread == curthread ||
	    spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);

	/*
	 * If our parent is reopening, then we are as well, unless we are
	 * going offline.
	 */
	if (pvd != NULL && pvd->vdev_reopening)
		vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline);

	vd->vdev_ops->vdev_op_close(vd);

	vdev_cache_purge(vd);

	/*
	 * We record the previous state before we close it, so that if we are
	 * doing a reopen(), we don't generate FMA ereports if we notice that
	 * it's still faulted.
	 */
	vd->vdev_prevstate = vd->vdev_state;

	if (vd->vdev_offline)
		vd->vdev_state = VDEV_STATE_OFFLINE;
	else
		vd->vdev_state = VDEV_STATE_CLOSED;
	vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
}

void
vdev_hold(vdev_t *vd)