Function vdev_free

freebsd/contrib/openzfs/module/zfs/vdev.c:930–1073

}

void
vdev_free(vdev_t *vd)
{
	spa_t *spa = vd->vdev_spa;

	ASSERT3P(vd->vdev_initialize_thread, ==, NULL);
	ASSERT3P(vd->vdev_trim_thread, ==, NULL);
	ASSERT3P(vd->vdev_autotrim_thread, ==, NULL);
	ASSERT3P(vd->vdev_rebuild_thread, ==, NULL);

	/*
	 * Scan queues are normally destroyed at the end of a scan. If the
	 * queue exists here, that implies the vdev is being removed while
	 * the scan is still running.
	 */
	if (vd->vdev_scan_io_queue != NULL) {
		mutex_enter(&vd->vdev_scan_io_queue_lock);
		dsl_scan_io_queue_destroy(vd->vdev_scan_io_queue);
		vd->vdev_scan_io_queue = NULL;
		mutex_exit(&vd->vdev_scan_io_queue_lock);
	}

	/*
	 * vdev_free() implies closing the vdev first.  This is simpler than
	 * trying to ensure complicated semantics for all callers.
	 */
	vdev_close(vd);

	ASSERT(!list_link_active(&vd->vdev_config_dirty_node));
	ASSERT(!list_link_active(&vd->vdev_state_dirty_node));

	/*
	 * Free all children.
	 */
	for (int c = 0; c < vd->vdev_children; c++)
		vdev_free(vd->vdev_child[c]);

	ASSERT(vd->vdev_child == NULL);
	ASSERT(vd->vdev_guid_sum == vd->vdev_guid);

	if (vd->vdev_ops->vdev_op_fini != NULL)
		vd->vdev_ops->vdev_op_fini(vd);

	/*
	 * Discard allocation state.
	 */
	if (vd->vdev_mg != NULL) {
		vdev_metaslab_fini(vd);
		metaslab_group_destroy(vd->vdev_mg);
		vd->vdev_mg = NULL;
	}

	ASSERT0(vd->vdev_stat.vs_space);
	ASSERT0(vd->vdev_stat.vs_dspace);
	ASSERT0(vd->vdev_stat.vs_alloc);

	/*
	 * Remove this vdev from its parent's child list.