Function vdev_trim_stop

freebsd/contrib/openzfs/module/zfs/vdev_trim.c:1026–1050

* Stop trimming a device, with the resultant trimming state being tgt_state. * For blocking behavior pass NULL for vd_list. Otherwise, when a list_t is * provided the stopping vdev is inserted in to the list. Callers are then * required to call vdev_trim_stop_wait() to block for all the trim threads * to exit. The caller must hold vdev_trim_lock and must not be writing to * the spa config,

 * reader before exiting.
 */
void
vdev_trim_stop(vdev_t *vd, vdev_trim_state_t tgt_state, list_t *vd_list)
{
	ASSERT(!spa_config_held(vd->vdev_spa, SCL_CONFIG|SCL_STATE, RW_WRITER));
	ASSERT(MUTEX_HELD(&vd->vdev_trim_lock));
	ASSERT(vd->vdev_ops->vdev_op_leaf);
	ASSERT(vdev_is_concrete(vd));

	/*
	 * Allow cancel requests to proceed even if the trim thread has
	 * stopped.
	 */
	if (vd->vdev_trim_thread == NULL && tgt_state != VDEV_TRIM_CANCELED)
		return;

	vdev_trim_change_state(vd, tgt_state, 0, 0, 0);
	vd->vdev_trim_exit_wanted = B_TRUE;

	if (vd_list == NULL) {
		vdev_trim_stop_wait_impl(vd);
	} else {
		ASSERT(MUTEX_HELD(&spa_namespace_lock));
		list_insert_tail(vd_list, vd);
	}
}

/*
 * Requests that all listed vdevs stop trimming.