fs/zfs/dsl_dataset.c

795 	 * If we are creating a clone, make sure we zero out any stale
1571 		dsl_dataset_t *clone;
1574 		    za.za_first_integer, FTAG, &clone));
1575 		dsl_dir_name(clone->ds_dir, buf);
1577 		dsl_dataset_rele(clone, FTAG);
1996 	 * When we do the clone swap, we will temporarily use more space
1999 	 * to be free).  We will immediately destroy the clone, freeing
2021 	dsl_dataset_t *ds, *clone;
2033 	VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone));
2035 	dsl_dataset_clone_swap_sync_impl(clone, ds, tx);
2038 	dsl_destroy_head_sync_impl(clone, tx);
2040 	dsl_dataset_rele(clone, FTAG);
2191 	 * If we are a clone of a clone then we never reached ORIGIN,
2192 	 * so we need to subtract out the clone origin's used space.
2209 	 * after the promotion (for both origin and clone).  For each,
2217 		 * Note, typically this will not be a clone of a clone,
2290 	/* change the origin's next clone */
2376 		/* move any clone references */
2423 	 * is true for each of {clone,origin} independently.
2581  * Promote a clone.
2617 dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
2623 	if (dsl_dataset_is_snapshot(clone) ||
2628 	if (!force && clone->ds_prev != origin_head->ds_prev)
2631 	/* clone should be the clone (unless they are unrelated) */
2632 	if (clone->ds_prev != NULL &&
2633 	    clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap &&
2634 	    origin_head->ds_dir != clone->ds_prev->ds_dir)
2637 	/* the clone should be a child of the origin */
2638 	if (clone->ds_dir->dd_parent != origin_head->ds_dir)
2655 	    clone->ds_phys->ds_unique_bytes);
2662 	/* clone can't be over the head's refquota */
2664 	    clone->ds_phys->ds_referenced_bytes > origin_head->ds_quota)
2671 dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
2677 	ASSERT(clone->ds_reserved == 0);
2679 	    clone->ds_phys->ds_unique_bytes <= origin_head->ds_quota);
2680 	ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev);
2682 	dmu_buf_will_dirty(clone->ds_dbuf, tx);
2685 	if (clone->ds_objset != NULL) {
2686 		dmu_objset_evict(clone->ds_objset);
2687 		clone->ds_objset = NULL;
2699 	    clone->ds_phys->ds_unique_bytes);
2704 	if (clone->ds_prev) {
2705 		dsl_dataset_t *origin = clone->ds_prev;
2709 		dsl_deadlist_space_range(&clone->ds_deadlist,
2718 		origin_head->ds_phys->ds_bp = clone->ds_phys->ds_bp;
2719 		clone->ds_phys->ds_bp = tmp;
2728 		ASSERT3U(clone->ds_dir->dd_phys->
2731 		dsl_deadlist_space(&clone->ds_deadlist,
2736 		dused = clone->ds_phys->ds_referenced_bytes + cdl_used -
2738 		dcomp = clone->ds_phys->ds_compressed_bytes + cdl_comp -
2740 		duncomp = clone->ds_phys->ds_uncompressed_bytes +
2746 		dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD,
2755 		dsl_deadlist_space_range(&clone->ds_deadlist,
2767 	    clone->ds_phys->ds_referenced_bytes);
2769 	    clone->ds_phys->ds_compressed_bytes);
2771 	    clone->ds_phys->ds_uncompressed_bytes);
2773 	    clone->ds_phys->ds_unique_bytes);
2782 	dsl_deadlist_close(&clone->ds_deadlist);
2785 	    clone->ds_phys->ds_deadlist_obj);
2786 	dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset,
2787 	    clone->ds_phys->ds_deadlist_obj);
2791 	dsl_scan_ds_clone_swapped(origin_head, clone, tx);
2793 	spa_history_log_internal_ds(clone, "clone swap", tx,