Function vdev_dtl_load

freebsd/contrib/openzfs/module/zfs/vdev.c:2972–3011

}

int
vdev_dtl_load(vdev_t *vd)
{
	spa_t *spa = vd->vdev_spa;
	objset_t *mos = spa->spa_meta_objset;
	range_tree_t *rt;
	int error = 0;

	if (vd->vdev_ops->vdev_op_leaf && vd->vdev_dtl_object != 0) {
		ASSERT(vdev_is_concrete(vd));

		error = space_map_open(&vd->vdev_dtl_sm, mos,
		    vd->vdev_dtl_object, 0, -1ULL, 0);
		if (error)
			return (error);
		ASSERT(vd->vdev_dtl_sm != NULL);

		rt = range_tree_create(NULL, RANGE_SEG64, NULL, 0, 0);
		error = space_map_load(vd->vdev_dtl_sm, rt, SM_ALLOC);
		if (error == 0) {
			mutex_enter(&vd->vdev_dtl_lock);
			range_tree_walk(rt, range_tree_add,
			    vd->vdev_dtl[DTL_MISSING]);
			mutex_exit(&vd->vdev_dtl_lock);
		}

		range_tree_vacate(rt, NULL, NULL);
		range_tree_destroy(rt);

		return (error);
	}

	for (int c = 0; c < vd->vdev_children; c++) {
		error = vdev_dtl_load(vd->vdev_child[c]);
		if (error != 0)
			break;
	}

	return (error);
}

static void
vdev_zap_allocation_data(vdev_t *vd, dmu_tx_t *tx)