122 	dsl_dataset_t *ds_prev;  member
139 		if (poa->ds_prev && !poa->after_branch_point &&  in process_old_cb()
141 		    dsl_dataset_phys(poa->ds_prev)->ds_prev_snap_txg) {  in process_old_cb()
142 			dsl_dataset_phys(poa->ds_prev)->ds_unique_bytes +=  in process_old_cb()
155 process_old_deadlist(dsl_dataset_t *ds, dsl_dataset_t *ds_prev,  in process_old_deadlist()  argument
167 	poa.ds_prev = ds_prev;  in process_old_deadlist()
313 	dsl_dataset_t *ds_prev = NULL;  in dsl_destroy_snapshot_sync_impl()  local
354 		ASSERT3P(ds->ds_prev, ==, NULL);  in dsl_destroy_snapshot_sync_impl()
356 		    dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &ds_prev));  in dsl_destroy_snapshot_sync_impl()
358 		    (dsl_dataset_phys(ds_prev)->ds_next_snap_obj != obj);  in dsl_destroy_snapshot_sync_impl()
360 		dmu_buf_will_dirty(ds_prev->ds_dbuf, tx);  in dsl_destroy_snapshot_sync_impl()
362 		    dsl_dataset_phys(ds_prev)->ds_next_clones_obj != 0) {  in dsl_destroy_snapshot_sync_impl()
363 			dsl_dataset_remove_from_next_clones(ds_prev, obj, tx);  in dsl_destroy_snapshot_sync_impl()
366 				    dsl_dataset_phys(ds_prev)->  in dsl_destroy_snapshot_sync_impl()
373 			dsl_dataset_phys(ds_prev)->ds_next_snap_obj =  in dsl_destroy_snapshot_sync_impl()
394 	    ds_prev ? dsl_dataset_phys(ds_prev)->ds_creation_txg : 0);  in dsl_destroy_snapshot_sync_impl()
397 		process_old_deadlist(ds, ds_prev, ds_next,  in dsl_destroy_snapshot_sync_impl()
401 		if (ds_prev && !after_branch_point) {  in dsl_destroy_snapshot_sync_impl()
403 			    dsl_dataset_phys(ds_prev)->ds_prev_snap_txg,  in dsl_destroy_snapshot_sync_impl()
406 			dsl_dataset_phys(ds_prev)->ds_unique_bytes += used;  in dsl_destroy_snapshot_sync_impl()
469 		ASSERT3P(ds_next->ds_prev, ==, NULL);  in dsl_destroy_snapshot_sync_impl()
488 		ASSERT3P(ds_next->ds_prev, ==, ds);  in dsl_destroy_snapshot_sync_impl()
489 		dsl_dataset_rele(ds_next->ds_prev, ds_next);  in dsl_destroy_snapshot_sync_impl()
490 		ds_next->ds_prev = NULL;  in dsl_destroy_snapshot_sync_impl()
491 		if (ds_prev) {  in dsl_destroy_snapshot_sync_impl()
494 			    ds_next, &ds_next->ds_prev));  in dsl_destroy_snapshot_sync_impl()
547 	if (ds_prev != NULL)  in dsl_destroy_snapshot_sync_impl()
548 		dsl_dataset_rele(ds_prev, FTAG);  in dsl_destroy_snapshot_sync_impl()
789 	if (ds->ds_prev != NULL &&  in dsl_destroy_head_check_impl()
790 	    dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == ds->ds_object)  in dsl_destroy_head_check_impl()
803 	if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev) &&  in dsl_destroy_head_check_impl()
804 	    dsl_dataset_phys(ds->ds_prev)->ds_num_children == 2 &&  in dsl_destroy_head_check_impl()
805 	    ds->ds_prev->ds_userrefs == 0) {  in dsl_destroy_head_check_impl()
807 		if (!zfs_refcount_is_zero(&ds->ds_prev->ds_longholds))  in dsl_destroy_head_check_impl()
1020 	ASSERT(ds->ds_prev == NULL ||  in dsl_destroy_head_sync_impl()
1021 	    dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj != ds->ds_object);  in dsl_destroy_head_sync_impl()
1031 	    DS_IS_DEFER_DESTROY(ds->ds_prev) &&  in dsl_destroy_head_sync_impl()
1032 	    dsl_dataset_phys(ds->ds_prev)->ds_num_children == 2 &&  in dsl_destroy_head_sync_impl()
1033 	    ds->ds_prev->ds_userrefs == 0);  in dsl_destroy_head_sync_impl()
1054 		ASSERT(ds->ds_prev != NULL);  in dsl_destroy_head_sync_impl()
1055 		ASSERT3U(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj, !=,  in dsl_destroy_head_sync_impl()
1059 		dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);  in dsl_destroy_head_sync_impl()
1060 		if (dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj != 0) {  in dsl_destroy_head_sync_impl()
1061 			dsl_dataset_remove_from_next_clones(ds->ds_prev,  in dsl_destroy_head_sync_impl()
1065 		ASSERT3U(dsl_dataset_phys(ds->ds_prev)->ds_num_children, >, 1);  in dsl_destroy_head_sync_impl()
1066 		dsl_dataset_phys(ds->ds_prev)->ds_num_children--;  in dsl_destroy_head_sync_impl()
1097 	if (ds->ds_prev != NULL) {  in dsl_destroy_head_sync_impl()
1100 			    dsl_dir_phys(ds->ds_prev->ds_dir)->dd_clones,  in dsl_destroy_head_sync_impl()
1103 		prevobj = ds->ds_prev->ds_object;  in dsl_destroy_head_sync_impl()
1104 		dsl_dataset_rele(ds->ds_prev, ds);  in dsl_destroy_head_sync_impl()
1105 		ds->ds_prev = NULL;  in dsl_destroy_head_sync_impl()