4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
25 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
26 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
28 * Copyright (c) 2015, STRATO AG, Inc. All rights reserved.
29 * Copyright (c) 2014 Integros [integros.com]
30 * Copyright 2017 Nexenta Systems, Inc.
33 /* Portions Copyright 2010 Robert Milkowski */
36 #include <sys/zfs_context.h>
37 #include <sys/dmu_objset.h>
38 #include <sys/dsl_dir.h>
39 #include <sys/dsl_dataset.h>
40 #include <sys/dsl_prop.h>
41 #include <sys/dsl_pool.h>
42 #include <sys/dsl_synctask.h>
43 #include <sys/dsl_deleg.h>
44 #include <sys/dnode.h>
47 #include <sys/dmu_tx.h>
50 #include <sys/dmu_impl.h>
51 #include <sys/zfs_ioctl.h>
53 #include <sys/zfs_onexit.h>
54 #include <sys/dsl_destroy.h>
56 #include <sys/zfeature.h>
59 * Needed to close a window in dnode_move() that allows the objset to be freed
60 * before it can be safely accessed.
65 * Tunable to overwrite the maximum number of threads for the parallization
66 * of dmu_objset_find_dp, needed to speed up the import of pools with many
68 * Default is 4 times the number of leaf vdevs.
70 int dmu_find_threads = 0;
73 * Backfill lower metadnode objects after this many have been freed.
74 * Backfilling negatively impacts object creation rates, so only do it
75 * if there are enough holes to fill.
77 int dmu_rescan_dnode_threshold = 131072;
79 static void dmu_objset_find_dp_cb(void *arg);
84 rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
94 dmu_objset_spa(objset_t *os)
100 dmu_objset_zil(objset_t *os)
106 dmu_objset_pool(objset_t *os)
110 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
111 return (ds->ds_dir->dd_pool);
113 return (spa_get_dsl(os->os_spa));
117 dmu_objset_ds(objset_t *os)
119 return (os->os_dsl_dataset);
123 dmu_objset_type(objset_t *os)
125 return (os->os_phys->os_type);
129 dmu_objset_name(objset_t *os, char *buf)
131 dsl_dataset_name(os->os_dsl_dataset, buf);
135 dmu_objset_id(objset_t *os)
137 dsl_dataset_t *ds = os->os_dsl_dataset;
139 return (ds ? ds->ds_object : 0);
143 dmu_objset_syncprop(objset_t *os)
145 return (os->os_sync);
149 dmu_objset_logbias(objset_t *os)
151 return (os->os_logbias);
155 checksum_changed_cb(void *arg, uint64_t newval)
160 * Inheritance should have been done by now.
162 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
164 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
168 compression_changed_cb(void *arg, uint64_t newval)
173 * Inheritance and range checking should have been done by now.
175 ASSERT(newval != ZIO_COMPRESS_INHERIT);
177 os->os_compress = zio_compress_select(os->os_spa, newval,
182 copies_changed_cb(void *arg, uint64_t newval)
187 * Inheritance and range checking should have been done by now.
190 ASSERT(newval <= spa_max_replication(os->os_spa));
192 os->os_copies = newval;
196 dedup_changed_cb(void *arg, uint64_t newval)
199 spa_t *spa = os->os_spa;
200 enum zio_checksum checksum;
203 * Inheritance should have been done by now.
205 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
207 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
209 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
210 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
214 primary_cache_changed_cb(void *arg, uint64_t newval)
219 * Inheritance and range checking should have been done by now.
221 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
222 newval == ZFS_CACHE_METADATA);
224 os->os_primary_cache = newval;
228 secondary_cache_changed_cb(void *arg, uint64_t newval)
233 * Inheritance and range checking should have been done by now.
235 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
236 newval == ZFS_CACHE_METADATA);
238 os->os_secondary_cache = newval;
242 sync_changed_cb(void *arg, uint64_t newval)
247 * Inheritance and range checking should have been done by now.
249 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
250 newval == ZFS_SYNC_DISABLED);
252 os->os_sync = newval;
254 zil_set_sync(os->os_zil, newval);
258 redundant_metadata_changed_cb(void *arg, uint64_t newval)
263 * Inheritance and range checking should have been done by now.
265 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
266 newval == ZFS_REDUNDANT_METADATA_MOST);
268 os->os_redundant_metadata = newval;
272 logbias_changed_cb(void *arg, uint64_t newval)
276 ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
277 newval == ZFS_LOGBIAS_THROUGHPUT);
278 os->os_logbias = newval;
280 zil_set_logbias(os->os_zil, newval);
284 recordsize_changed_cb(void *arg, uint64_t newval)
288 os->os_recordsize = newval;
292 dmu_objset_byteswap(void *buf, size_t size)
294 objset_phys_t *osp = buf;
296 ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
297 dnode_byteswap(&osp->os_meta_dnode);
298 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
299 osp->os_type = BSWAP_64(osp->os_type);
300 osp->os_flags = BSWAP_64(osp->os_flags);
301 if (size == sizeof (objset_phys_t)) {
302 dnode_byteswap(&osp->os_userused_dnode);
303 dnode_byteswap(&osp->os_groupused_dnode);
308 * The hash is a CRC-based hash of the objset_t pointer and the object number.
311 dnode_hash(const objset_t *os, uint64_t obj)
313 uintptr_t osv = (uintptr_t)os;
314 uint64_t crc = -1ULL;
316 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
318 * The low 6 bits of the pointer don't have much entropy, because
319 * the objset_t is larger than 2^6 bytes long.
321 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
322 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
323 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
324 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF];
326 crc ^= (osv>>14) ^ (obj>>24);
332 dnode_multilist_index_func(multilist_t *ml, void *obj)
335 return (dnode_hash(dn->dn_objset, dn->dn_object) %
336 multilist_get_num_sublists(ml));
340 * Instantiates the objset_t in-memory structure corresponding to the
341 * objset_phys_t that's pointed to by the specified blkptr_t.
344 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
350 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
353 * The $ORIGIN dataset (if it exists) doesn't have an associated
354 * objset, so there's no reason to open it. The $ORIGIN dataset
355 * will not exist on pools older than SPA_VERSION_ORIGIN.
357 if (ds != NULL && spa_get_dsl(spa) != NULL &&
358 spa_get_dsl(spa)->dp_origin_snap != NULL) {
359 ASSERT3P(ds->ds_dir, !=,
360 spa_get_dsl(spa)->dp_origin_snap->ds_dir);
363 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
364 os->os_dsl_dataset = ds;
367 if (!BP_IS_HOLE(os->os_rootbp)) {
368 arc_flags_t aflags = ARC_FLAG_WAIT;
370 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
371 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
373 if (DMU_OS_IS_L2CACHEABLE(os))
374 aflags |= ARC_FLAG_L2CACHE;
376 dprintf_bp(os->os_rootbp, "reading %s", "");
377 err = arc_read(NULL, spa, os->os_rootbp,
378 arc_getbuf_func, &os->os_phys_buf,
379 ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
381 kmem_free(os, sizeof (objset_t));
382 /* convert checksum errors into IO errors */
384 err = SET_ERROR(EIO);
388 /* Increase the blocksize if we are permitted. */
389 if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
390 arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) {
391 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf,
392 ARC_BUFC_METADATA, sizeof (objset_phys_t));
393 bzero(buf->b_data, sizeof (objset_phys_t));
394 bcopy(os->os_phys_buf->b_data, buf->b_data,
395 arc_buf_size(os->os_phys_buf));
396 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
397 os->os_phys_buf = buf;
400 os->os_phys = os->os_phys_buf->b_data;
401 os->os_flags = os->os_phys->os_flags;
403 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
404 sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
405 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf,
406 ARC_BUFC_METADATA, size);
407 os->os_phys = os->os_phys_buf->b_data;
408 bzero(os->os_phys, size);
412 * Note: the changed_cb will be called once before the register
413 * func returns, thus changing the checksum/compression from the
414 * default (fletcher2/off). Snapshots don't need to know about
415 * checksum/compression/copies.
418 boolean_t needlock = B_FALSE;
421 * Note: it's valid to open the objset if the dataset is
422 * long-held, in which case the pool_config lock will not
425 if (!dsl_pool_config_held(dmu_objset_pool(os))) {
427 dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
429 err = dsl_prop_register(ds,
430 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
431 primary_cache_changed_cb, os);
433 err = dsl_prop_register(ds,
434 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
435 secondary_cache_changed_cb, os);
437 if (!ds->ds_is_snapshot) {
439 err = dsl_prop_register(ds,
440 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
441 checksum_changed_cb, os);
444 err = dsl_prop_register(ds,
445 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
446 compression_changed_cb, os);
449 err = dsl_prop_register(ds,
450 zfs_prop_to_name(ZFS_PROP_COPIES),
451 copies_changed_cb, os);
454 err = dsl_prop_register(ds,
455 zfs_prop_to_name(ZFS_PROP_DEDUP),
456 dedup_changed_cb, os);
459 err = dsl_prop_register(ds,
460 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
461 logbias_changed_cb, os);
464 err = dsl_prop_register(ds,
465 zfs_prop_to_name(ZFS_PROP_SYNC),
466 sync_changed_cb, os);
469 err = dsl_prop_register(ds,
471 ZFS_PROP_REDUNDANT_METADATA),
472 redundant_metadata_changed_cb, os);
475 err = dsl_prop_register(ds,
476 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
477 recordsize_changed_cb, os);
481 dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
483 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
484 kmem_free(os, sizeof (objset_t));
488 /* It's the meta-objset. */
489 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
490 os->os_compress = ZIO_COMPRESS_ON;
491 os->os_copies = spa_max_replication(spa);
492 os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
493 os->os_dedup_verify = B_FALSE;
494 os->os_logbias = ZFS_LOGBIAS_LATENCY;
495 os->os_sync = ZFS_SYNC_STANDARD;
496 os->os_primary_cache = ZFS_CACHE_ALL;
497 os->os_secondary_cache = ZFS_CACHE_ALL;
500 if (ds == NULL || !ds->ds_is_snapshot)
501 os->os_zil_header = os->os_phys->os_zil_header;
502 os->os_zil = zil_alloc(os, &os->os_zil_header);
504 for (i = 0; i < TXG_SIZE; i++) {
505 os->os_dirty_dnodes[i] = multilist_create(sizeof (dnode_t),
506 offsetof(dnode_t, dn_dirty_link[i]),
507 dnode_multilist_index_func);
509 list_create(&os->os_dnodes, sizeof (dnode_t),
510 offsetof(dnode_t, dn_link));
511 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
512 offsetof(dmu_buf_impl_t, db_link));
514 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
515 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL);
516 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
517 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
519 dnode_special_open(os, &os->os_phys->os_meta_dnode,
520 DMU_META_DNODE_OBJECT, &os->os_meta_dnode);
521 if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) {
522 dnode_special_open(os, &os->os_phys->os_userused_dnode,
523 DMU_USERUSED_OBJECT, &os->os_userused_dnode);
524 dnode_special_open(os, &os->os_phys->os_groupused_dnode,
525 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode);
533 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
538 * We shouldn't be doing anything with dsl_dataset_t's unless the
539 * pool_config lock is held, or the dataset is long-held.
541 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool) ||
542 dsl_dataset_long_held(ds));
544 mutex_enter(&ds->ds_opening_lock);
545 if (ds->ds_objset == NULL) {
547 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
548 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
549 ds, dsl_dataset_get_blkptr(ds), &os);
550 rrw_exit(&ds->ds_bp_rwlock, FTAG);
553 mutex_enter(&ds->ds_lock);
554 ASSERT(ds->ds_objset == NULL);
556 mutex_exit(&ds->ds_lock);
559 *osp = ds->ds_objset;
560 mutex_exit(&ds->ds_opening_lock);
565 * Holds the pool while the objset is held. Therefore only one objset
566 * can be held at a time.
569 dmu_objset_hold(const char *name, void *tag, objset_t **osp)
575 err = dsl_pool_hold(name, tag, &dp);
578 err = dsl_dataset_hold(dp, name, tag, &ds);
580 dsl_pool_rele(dp, tag);
584 err = dmu_objset_from_ds(ds, osp);
586 dsl_dataset_rele(ds, tag);
587 dsl_pool_rele(dp, tag);
594 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type,
595 boolean_t readonly, void *tag, objset_t **osp)
599 err = dmu_objset_from_ds(ds, osp);
601 dsl_dataset_disown(ds, tag);
602 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
603 dsl_dataset_disown(ds, tag);
604 return (SET_ERROR(EINVAL));
605 } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
606 dsl_dataset_disown(ds, tag);
607 return (SET_ERROR(EROFS));
613 * dsl_pool must not be held when this is called.
614 * Upon successful return, there will be a longhold on the dataset,
615 * and the dsl_pool will not be held.
618 dmu_objset_own(const char *name, dmu_objset_type_t type,
619 boolean_t readonly, void *tag, objset_t **osp)
625 err = dsl_pool_hold(name, FTAG, &dp);
628 err = dsl_dataset_own(dp, name, tag, &ds);
630 dsl_pool_rele(dp, FTAG);
633 err = dmu_objset_own_impl(ds, type, readonly, tag, osp);
634 dsl_pool_rele(dp, FTAG);
640 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
641 boolean_t readonly, void *tag, objset_t **osp)
646 err = dsl_dataset_own_obj(dp, obj, tag, &ds);
650 return (dmu_objset_own_impl(ds, type, readonly, tag, osp));
654 dmu_objset_rele(objset_t *os, void *tag)
656 dsl_pool_t *dp = dmu_objset_pool(os);
657 dsl_dataset_rele(os->os_dsl_dataset, tag);
658 dsl_pool_rele(dp, tag);
662 * When we are called, os MUST refer to an objset associated with a dataset
663 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
664 * == tag. We will then release and reacquire ownership of the dataset while
665 * holding the pool config_rwlock to avoid intervening namespace or ownership
668 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
669 * release the hold on its dataset and acquire a new one on the dataset of the
670 * same name so that it can be partially torn down and reconstructed.
673 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
677 char name[ZFS_MAX_DATASET_NAME_LEN];
679 VERIFY3P(ds, !=, NULL);
680 VERIFY3P(ds->ds_owner, ==, tag);
681 VERIFY(dsl_dataset_long_held(ds));
683 dsl_dataset_name(ds, name);
684 dp = ds->ds_dir->dd_pool;
685 dsl_pool_config_enter(dp, FTAG);
686 dsl_dataset_disown(ds, tag);
687 VERIFY0(dsl_dataset_own(dp, name, tag, newds));
688 dsl_pool_config_exit(dp, FTAG);
692 dmu_objset_disown(objset_t *os, void *tag)
694 dsl_dataset_disown(os->os_dsl_dataset, tag);
698 dmu_objset_evict_dbufs(objset_t *os)
703 mutex_enter(&os->os_lock);
704 dn = list_head(&os->os_dnodes);
707 * Skip dnodes without holds. We have to do this dance
708 * because dnode_add_ref() only works if there is already a
709 * hold. If the dnode has no holds, then it has no dbufs.
711 if (dnode_add_ref(dn, FTAG)) {
712 list_insert_after(&os->os_dnodes, dn, &dn_marker);
713 mutex_exit(&os->os_lock);
715 dnode_evict_dbufs(dn);
716 dnode_rele(dn, FTAG);
718 mutex_enter(&os->os_lock);
719 dn = list_next(&os->os_dnodes, &dn_marker);
720 list_remove(&os->os_dnodes, &dn_marker);
722 dn = list_next(&os->os_dnodes, dn);
725 mutex_exit(&os->os_lock);
727 if (DMU_USERUSED_DNODE(os) != NULL) {
728 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os));
729 dnode_evict_dbufs(DMU_USERUSED_DNODE(os));
731 dnode_evict_dbufs(DMU_META_DNODE(os));
735 * Objset eviction processing is split into into two pieces.
736 * The first marks the objset as evicting, evicts any dbufs that
737 * have a refcount of zero, and then queues up the objset for the
738 * second phase of eviction. Once os->os_dnodes has been cleared by
739 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed.
740 * The second phase closes the special dnodes, dequeues the objset from
741 * the list of those undergoing eviction, and finally frees the objset.
743 * NOTE: Due to asynchronous eviction processing (invocation of
744 * dnode_buf_pageout()), it is possible for the meta dnode for the
745 * objset to have no holds even though os->os_dnodes is not empty.
748 dmu_objset_evict(objset_t *os)
750 dsl_dataset_t *ds = os->os_dsl_dataset;
752 for (int t = 0; t < TXG_SIZE; t++)
753 ASSERT(!dmu_objset_is_dirty(os, t));
756 dsl_prop_unregister_all(ds, os);
761 dmu_objset_evict_dbufs(os);
763 mutex_enter(&os->os_lock);
764 spa_evicting_os_register(os->os_spa, os);
765 if (list_is_empty(&os->os_dnodes)) {
766 mutex_exit(&os->os_lock);
767 dmu_objset_evict_done(os);
769 mutex_exit(&os->os_lock);
774 dmu_objset_evict_done(objset_t *os)
776 ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
778 dnode_special_close(&os->os_meta_dnode);
779 if (DMU_USERUSED_DNODE(os)) {
780 dnode_special_close(&os->os_userused_dnode);
781 dnode_special_close(&os->os_groupused_dnode);
783 zil_free(os->os_zil);
785 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
788 * This is a barrier to prevent the objset from going away in
789 * dnode_move() until we can safely ensure that the objset is still in
790 * use. We consider the objset valid before the barrier and invalid
793 rw_enter(&os_lock, RW_READER);
796 mutex_destroy(&os->os_lock);
797 mutex_destroy(&os->os_userused_lock);
798 mutex_destroy(&os->os_obj_lock);
799 mutex_destroy(&os->os_user_ptr_lock);
800 for (int i = 0; i < TXG_SIZE; i++) {
801 multilist_destroy(os->os_dirty_dnodes[i]);
803 spa_evicting_os_deregister(os->os_spa, os);
804 kmem_free(os, sizeof (objset_t));
808 dmu_objset_snap_cmtime(objset_t *os)
810 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
813 /* called from dsl for meta-objset */
815 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
816 dmu_objset_type_t type, dmu_tx_t *tx)
821 ASSERT(dmu_tx_is_syncing(tx));
824 VERIFY0(dmu_objset_from_ds(ds, &os));
826 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
828 mdn = DMU_META_DNODE(os);
830 dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
831 DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
834 * We don't want to have to increase the meta-dnode's nlevels
835 * later, because then we could do it in quescing context while
836 * we are also accessing it in open context.
838 * This precaution is not necessary for the MOS (ds == NULL),
839 * because the MOS is only updated in syncing context.
840 * This is most fortunate: the MOS is the only objset that
841 * needs to be synced multiple times as spa_sync() iterates
842 * to convergence, so minimizing its dn_nlevels matters.
848 * Determine the number of levels necessary for the meta-dnode
849 * to contain DN_MAX_OBJECT dnodes. Note that in order to
850 * ensure that we do not overflow 64 bits, there has to be
851 * a nlevels that gives us a number of blocks > DN_MAX_OBJECT
852 * but < 2^64. Therefore,
853 * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) (10) must be
854 * less than (64 - log2(DN_MAX_OBJECT)) (16).
856 while ((uint64_t)mdn->dn_nblkptr <<
857 (mdn->dn_datablkshift - DNODE_SHIFT +
858 (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
862 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
863 mdn->dn_nlevels = levels;
866 ASSERT(type != DMU_OST_NONE);
867 ASSERT(type != DMU_OST_ANY);
868 ASSERT(type < DMU_OST_NUMTYPES);
869 os->os_phys->os_type = type;
870 if (dmu_objset_userused_enabled(os)) {
871 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
872 os->os_flags = os->os_phys->os_flags;
875 dsl_dataset_dirty(ds, tx);
880 typedef struct dmu_objset_create_arg {
881 const char *doca_name;
883 void (*doca_userfunc)(objset_t *os, void *arg,
884 cred_t *cr, dmu_tx_t *tx);
886 dmu_objset_type_t doca_type;
888 } dmu_objset_create_arg_t;
892 dmu_objset_create_check(void *arg, dmu_tx_t *tx)
894 dmu_objset_create_arg_t *doca = arg;
895 dsl_pool_t *dp = dmu_tx_pool(tx);
900 if (strchr(doca->doca_name, '@') != NULL)
901 return (SET_ERROR(EINVAL));
903 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN)
904 return (SET_ERROR(ENAMETOOLONG));
906 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
910 dsl_dir_rele(pdd, FTAG);
911 return (SET_ERROR(EEXIST));
913 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
915 dsl_dir_rele(pdd, FTAG);
921 dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
923 dmu_objset_create_arg_t *doca = arg;
924 dsl_pool_t *dp = dmu_tx_pool(tx);
932 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
934 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
935 doca->doca_cred, tx);
937 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
938 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
939 bp = dsl_dataset_get_blkptr(ds);
940 os = dmu_objset_create_impl(pdd->dd_pool->dp_spa,
941 ds, bp, doca->doca_type, tx);
942 rrw_exit(&ds->ds_bp_rwlock, FTAG);
944 if (doca->doca_userfunc != NULL) {
945 doca->doca_userfunc(os, doca->doca_userarg,
946 doca->doca_cred, tx);
949 spa_history_log_internal_ds(ds, "create", tx, "");
950 dsl_dataset_rele(ds, FTAG);
951 dsl_dir_rele(pdd, FTAG);
955 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
956 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
958 dmu_objset_create_arg_t doca;
960 doca.doca_name = name;
961 doca.doca_cred = CRED();
962 doca.doca_flags = flags;
963 doca.doca_userfunc = func;
964 doca.doca_userarg = arg;
965 doca.doca_type = type;
967 return (dsl_sync_task(name,
968 dmu_objset_create_check, dmu_objset_create_sync, &doca,
969 5, ZFS_SPACE_CHECK_NORMAL));
972 typedef struct dmu_objset_clone_arg {
973 const char *doca_clone;
974 const char *doca_origin;
976 } dmu_objset_clone_arg_t;
980 dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
982 dmu_objset_clone_arg_t *doca = arg;
986 dsl_dataset_t *origin;
987 dsl_pool_t *dp = dmu_tx_pool(tx);
989 if (strchr(doca->doca_clone, '@') != NULL)
990 return (SET_ERROR(EINVAL));
992 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN)
993 return (SET_ERROR(ENAMETOOLONG));
995 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
999 dsl_dir_rele(pdd, FTAG);
1000 return (SET_ERROR(EEXIST));
1003 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1006 dsl_dir_rele(pdd, FTAG);
1007 return (SET_ERROR(EDQUOT));
1009 dsl_dir_rele(pdd, FTAG);
1011 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
1015 /* You can only clone snapshots, not the head datasets. */
1016 if (!origin->ds_is_snapshot) {
1017 dsl_dataset_rele(origin, FTAG);
1018 return (SET_ERROR(EINVAL));
1020 dsl_dataset_rele(origin, FTAG);
1026 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
1028 dmu_objset_clone_arg_t *doca = arg;
1029 dsl_pool_t *dp = dmu_tx_pool(tx);
1032 dsl_dataset_t *origin, *ds;
1034 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
1036 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
1037 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
1039 obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
1040 doca->doca_cred, tx);
1042 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
1043 dsl_dataset_name(origin, namebuf);
1044 spa_history_log_internal_ds(ds, "clone", tx,
1045 "origin=%s (%llu)", namebuf, origin->ds_object);
1046 dsl_dataset_rele(ds, FTAG);
1047 dsl_dataset_rele(origin, FTAG);
1048 dsl_dir_rele(pdd, FTAG);
1052 dmu_objset_clone(const char *clone, const char *origin)
1054 dmu_objset_clone_arg_t doca;
1056 doca.doca_clone = clone;
1057 doca.doca_origin = origin;
1058 doca.doca_cred = CRED();
1060 return (dsl_sync_task(clone,
1061 dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
1062 5, ZFS_SPACE_CHECK_NORMAL));
1066 dmu_objset_remap_indirects_impl(objset_t *os, uint64_t last_removed_txg)
1069 uint64_t object = 0;
1070 while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1071 error = dmu_object_remap_indirects(os, object,
1074 * If the ZPL removed the object before we managed to dnode_hold
1075 * it, we would get an ENOENT. If the ZPL declares its intent
1076 * to remove the object (dnode_free) before we manage to
1077 * dnode_hold it, we would get an EEXIST. In either case, we
1078 * want to continue remapping the other objects in the objset;
1079 * in all other cases, we want to break early.
1081 if (error != 0 && error != ENOENT && error != EEXIST) {
1085 if (error == ESRCH) {
1092 dmu_objset_remap_indirects(const char *fsname)
1095 objset_t *os = NULL;
1096 uint64_t last_removed_txg;
1097 uint64_t remap_start_txg;
1100 error = dmu_objset_hold(fsname, FTAG, &os);
1104 dd = dmu_objset_ds(os)->ds_dir;
1106 if (!spa_feature_is_enabled(dmu_objset_spa(os),
1107 SPA_FEATURE_OBSOLETE_COUNTS)) {
1108 dmu_objset_rele(os, FTAG);
1109 return (SET_ERROR(ENOTSUP));
1112 if (dsl_dataset_is_snapshot(dmu_objset_ds(os))) {
1113 dmu_objset_rele(os, FTAG);
1114 return (SET_ERROR(EINVAL));
1118 * If there has not been a removal, we're done.
1120 last_removed_txg = spa_get_last_removal_txg(dmu_objset_spa(os));
1121 if (last_removed_txg == -1ULL) {
1122 dmu_objset_rele(os, FTAG);
1127 * If we have remapped since the last removal, we're done.
1129 if (dsl_dir_is_zapified(dd)) {
1130 uint64_t last_remap_txg;
1131 if (zap_lookup(spa_meta_objset(dmu_objset_spa(os)),
1132 dd->dd_object, DD_FIELD_LAST_REMAP_TXG,
1133 sizeof (last_remap_txg), 1, &last_remap_txg) == 0 &&
1134 last_remap_txg > last_removed_txg) {
1135 dmu_objset_rele(os, FTAG);
1140 dsl_dataset_long_hold(dmu_objset_ds(os), FTAG);
1141 dsl_pool_rele(dmu_objset_pool(os), FTAG);
1143 remap_start_txg = spa_last_synced_txg(dmu_objset_spa(os));
1144 error = dmu_objset_remap_indirects_impl(os, last_removed_txg);
1147 * We update the last_remap_txg to be the start txg so that
1148 * we can guarantee that every block older than last_remap_txg
1149 * that can be remapped has been remapped.
1151 error = dsl_dir_update_last_remap_txg(dd, remap_start_txg);
1154 dsl_dataset_long_rele(dmu_objset_ds(os), FTAG);
1155 dsl_dataset_rele(dmu_objset_ds(os), FTAG);
1161 dmu_objset_snapshot_one(const char *fsname, const char *snapname)
1164 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
1165 nvlist_t *snaps = fnvlist_alloc();
1167 fnvlist_add_boolean(snaps, longsnap);
1169 err = dsl_dataset_snapshot(snaps, NULL, NULL);
1170 fnvlist_free(snaps);
1175 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx)
1179 while ((dn = multilist_sublist_head(list)) != NULL) {
1180 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
1181 ASSERT(dn->dn_dbuf->db_data_pending);
1183 * Initialize dn_zio outside dnode_sync() because the
1184 * meta-dnode needs to set it ouside dnode_sync().
1186 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
1189 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
1190 multilist_sublist_remove(list, dn);
1192 multilist_t *newlist = dn->dn_objset->os_synced_dnodes;
1193 if (newlist != NULL) {
1194 (void) dnode_add_ref(dn, newlist);
1195 multilist_insert(newlist, dn);
1204 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
1206 blkptr_t *bp = zio->io_bp;
1208 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
1210 ASSERT(!BP_IS_EMBEDDED(bp));
1211 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
1212 ASSERT0(BP_GET_LEVEL(bp));
1215 * Update rootbp fill count: it should be the number of objects
1216 * allocated in the object set (not counting the "special"
1217 * objects that are stored in the objset_phys_t -- the meta
1218 * dnode and user/group accounting objects).
1221 for (int i = 0; i < dnp->dn_nblkptr; i++)
1222 bp->blk_fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
1223 if (os->os_dsl_dataset != NULL)
1224 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG);
1225 *os->os_rootbp = *bp;
1226 if (os->os_dsl_dataset != NULL)
1227 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG);
1232 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
1234 blkptr_t *bp = zio->io_bp;
1235 blkptr_t *bp_orig = &zio->io_bp_orig;
1238 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
1239 ASSERT(BP_EQUAL(bp, bp_orig));
1241 dsl_dataset_t *ds = os->os_dsl_dataset;
1242 dmu_tx_t *tx = os->os_synctx;
1244 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
1245 dsl_dataset_block_born(ds, bp, tx);
1247 kmem_free(bp, sizeof (*bp));
1250 typedef struct sync_dnodes_arg {
1251 multilist_t *sda_list;
1252 int sda_sublist_idx;
1253 multilist_t *sda_newlist;
1255 } sync_dnodes_arg_t;
1258 sync_dnodes_task(void *arg)
1260 sync_dnodes_arg_t *sda = arg;
1262 multilist_sublist_t *ms =
1263 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx);
1265 dmu_objset_sync_dnodes(ms, sda->sda_tx);
1267 multilist_sublist_unlock(ms);
1269 kmem_free(sda, sizeof (*sda));
1273 /* called from dsl */
1275 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
1278 zbookmark_phys_t zb;
1282 dbuf_dirty_record_t *dr;
1283 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP);
1284 *blkptr_copy = *os->os_rootbp;
1286 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
1288 ASSERT(dmu_tx_is_syncing(tx));
1289 /* XXX the write_done callback should really give us the tx... */
1292 if (os->os_dsl_dataset == NULL) {
1294 * This is the MOS. If we have upgraded,
1295 * spa_max_replication() could change, so reset
1298 os->os_copies = spa_max_replication(os->os_spa);
1302 * Create the root block IO
1304 SET_BOOKMARK(&zb, os->os_dsl_dataset ?
1305 os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
1306 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
1307 arc_release(os->os_phys_buf, &os->os_phys_buf);
1309 dmu_write_policy(os, NULL, 0, 0, &zp);
1311 zio = arc_write(pio, os->os_spa, tx->tx_txg,
1312 blkptr_copy, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os),
1313 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done,
1314 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
1317 * Sync special dnodes - the parent IO for the sync is the root block
1319 DMU_META_DNODE(os)->dn_zio = zio;
1320 dnode_sync(DMU_META_DNODE(os), tx);
1322 os->os_phys->os_flags = os->os_flags;
1324 if (DMU_USERUSED_DNODE(os) &&
1325 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1326 DMU_USERUSED_DNODE(os)->dn_zio = zio;
1327 dnode_sync(DMU_USERUSED_DNODE(os), tx);
1328 DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
1329 dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
1332 txgoff = tx->tx_txg & TXG_MASK;
1334 if (dmu_objset_userused_enabled(os)) {
1336 * We must create the list here because it uses the
1337 * dn_dirty_link[] of this txg. But it may already
1338 * exist because we call dsl_dataset_sync() twice per txg.
1340 if (os->os_synced_dnodes == NULL) {
1341 os->os_synced_dnodes =
1342 multilist_create(sizeof (dnode_t),
1343 offsetof(dnode_t, dn_dirty_link[txgoff]),
1344 dnode_multilist_index_func);
1346 ASSERT3U(os->os_synced_dnodes->ml_offset, ==,
1347 offsetof(dnode_t, dn_dirty_link[txgoff]));
1352 i < multilist_get_num_sublists(os->os_dirty_dnodes[txgoff]); i++) {
1353 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP);
1354 sda->sda_list = os->os_dirty_dnodes[txgoff];
1355 sda->sda_sublist_idx = i;
1357 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
1358 sync_dnodes_task, sda, 0);
1359 /* callback frees sda */
1361 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq);
1363 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
1364 while ((dr = list_head(list)) != NULL) {
1365 ASSERT0(dr->dr_dbuf->db_level);
1366 list_remove(list, dr);
1368 zio_nowait(dr->dr_zio);
1371 /* Enable dnode backfill if enough objects have been freed. */
1372 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) {
1373 os->os_rescan_dnodes = B_TRUE;
1374 os->os_freed_dnodes = 0;
1378 * Free intent log blocks up to this tx.
1380 zil_sync(os->os_zil, tx);
1381 os->os_phys->os_zil_header = os->os_zil_header;
1386 dmu_objset_is_dirty(objset_t *os, uint64_t txg)
1388 return (!multilist_is_empty(os->os_dirty_dnodes[txg & TXG_MASK]));
1391 static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
1394 dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
1400 dmu_objset_userused_enabled(objset_t *os)
1402 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1403 used_cbs[os->os_phys->os_type] != NULL &&
1404 DMU_USERUSED_DNODE(os) != NULL);
1407 typedef struct userquota_node {
1410 avl_node_t uqn_node;
1413 typedef struct userquota_cache {
1414 avl_tree_t uqc_user_deltas;
1415 avl_tree_t uqc_group_deltas;
1416 } userquota_cache_t;
1419 userquota_compare(const void *l, const void *r)
1421 const userquota_node_t *luqn = l;
1422 const userquota_node_t *ruqn = r;
1424 if (luqn->uqn_id < ruqn->uqn_id)
1426 if (luqn->uqn_id > ruqn->uqn_id)
1432 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx)
1435 userquota_node_t *uqn;
1437 ASSERT(dmu_tx_is_syncing(tx));
1440 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas,
1441 &cookie)) != NULL) {
1443 * os_userused_lock protects against concurrent calls to
1444 * zap_increment_int(). It's needed because zap_increment_int()
1445 * is not thread-safe (i.e. not atomic).
1447 mutex_enter(&os->os_userused_lock);
1448 VERIFY0(zap_increment_int(os, DMU_USERUSED_OBJECT,
1449 uqn->uqn_id, uqn->uqn_delta, tx));
1450 mutex_exit(&os->os_userused_lock);
1451 kmem_free(uqn, sizeof (*uqn));
1453 avl_destroy(&cache->uqc_user_deltas);
1456 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas,
1457 &cookie)) != NULL) {
1458 mutex_enter(&os->os_userused_lock);
1459 VERIFY0(zap_increment_int(os, DMU_GROUPUSED_OBJECT,
1460 uqn->uqn_id, uqn->uqn_delta, tx));
1461 mutex_exit(&os->os_userused_lock);
1462 kmem_free(uqn, sizeof (*uqn));
1464 avl_destroy(&cache->uqc_group_deltas);
1468 userquota_update_cache(avl_tree_t *avl, uint64_t id, int64_t delta)
1470 userquota_node_t search = { .uqn_id = id };
1473 userquota_node_t *uqn = avl_find(avl, &search, &idx);
1475 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP);
1477 avl_insert(avl, uqn, idx);
1479 uqn->uqn_delta += delta;
1483 do_userquota_update(userquota_cache_t *cache, uint64_t used, uint64_t flags,
1484 uint64_t user, uint64_t group, boolean_t subtract)
1486 if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) {
1487 int64_t delta = DNODE_SIZE + used;
1491 userquota_update_cache(&cache->uqc_user_deltas, user, delta);
1492 userquota_update_cache(&cache->uqc_group_deltas, group, delta);
1496 typedef struct userquota_updates_arg {
1498 int uua_sublist_idx;
1500 } userquota_updates_arg_t;
1503 userquota_updates_task(void *arg)
1505 userquota_updates_arg_t *uua = arg;
1506 objset_t *os = uua->uua_os;
1507 dmu_tx_t *tx = uua->uua_tx;
1509 userquota_cache_t cache = { 0 };
1511 multilist_sublist_t *list =
1512 multilist_sublist_lock(os->os_synced_dnodes, uua->uua_sublist_idx);
1514 ASSERT(multilist_sublist_head(list) == NULL ||
1515 dmu_objset_userused_enabled(os));
1516 avl_create(&cache.uqc_user_deltas, userquota_compare,
1517 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
1518 avl_create(&cache.uqc_group_deltas, userquota_compare,
1519 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
1521 while ((dn = multilist_sublist_head(list)) != NULL) {
1523 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
1524 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
1525 dn->dn_phys->dn_flags &
1526 DNODE_FLAG_USERUSED_ACCOUNTED);
1528 flags = dn->dn_id_flags;
1530 if (flags & DN_ID_OLD_EXIST) {
1531 do_userquota_update(&cache,
1532 dn->dn_oldused, dn->dn_oldflags,
1533 dn->dn_olduid, dn->dn_oldgid, B_TRUE);
1535 if (flags & DN_ID_NEW_EXIST) {
1536 do_userquota_update(&cache,
1537 DN_USED_BYTES(dn->dn_phys),
1538 dn->dn_phys->dn_flags, dn->dn_newuid,
1539 dn->dn_newgid, B_FALSE);
1542 mutex_enter(&dn->dn_mtx);
1544 dn->dn_oldflags = 0;
1545 if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
1546 dn->dn_olduid = dn->dn_newuid;
1547 dn->dn_oldgid = dn->dn_newgid;
1548 dn->dn_id_flags |= DN_ID_OLD_EXIST;
1549 if (dn->dn_bonuslen == 0)
1550 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
1552 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1554 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
1555 mutex_exit(&dn->dn_mtx);
1557 multilist_sublist_remove(list, dn);
1558 dnode_rele(dn, os->os_synced_dnodes);
1560 do_userquota_cacheflush(os, &cache, tx);
1561 multilist_sublist_unlock(list);
1562 kmem_free(uua, sizeof (*uua));
1566 dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx)
1568 if (!dmu_objset_userused_enabled(os))
1571 /* Allocate the user/groupused objects if necessary. */
1572 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
1573 VERIFY0(zap_create_claim(os,
1574 DMU_USERUSED_OBJECT,
1575 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1576 VERIFY0(zap_create_claim(os,
1577 DMU_GROUPUSED_OBJECT,
1578 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1582 i < multilist_get_num_sublists(os->os_synced_dnodes); i++) {
1583 userquota_updates_arg_t *uua =
1584 kmem_alloc(sizeof (*uua), KM_SLEEP);
1586 uua->uua_sublist_idx = i;
1588 /* note: caller does taskq_wait() */
1589 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
1590 userquota_updates_task, uua, 0);
1591 /* callback frees uua */
1596 * Returns a pointer to data to find uid/gid from
1598 * If a dirty record for transaction group that is syncing can't
1599 * be found then NULL is returned. In the NULL case it is assumed
1600 * the uid/gid aren't changing.
1603 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
1605 dbuf_dirty_record_t *dr, **drp;
1608 if (db->db_dirtycnt == 0)
1609 return (db->db.db_data); /* Nothing is changing */
1611 for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
1612 if (dr->dr_txg == tx->tx_txg)
1620 DB_DNODE_ENTER(dr->dr_dbuf);
1621 dn = DB_DNODE(dr->dr_dbuf);
1623 if (dn->dn_bonuslen == 0 &&
1624 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
1625 data = dr->dt.dl.dr_data->b_data;
1627 data = dr->dt.dl.dr_data;
1629 DB_DNODE_EXIT(dr->dr_dbuf);
1636 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
1638 objset_t *os = dn->dn_objset;
1640 dmu_buf_impl_t *db = NULL;
1641 uint64_t *user = NULL;
1642 uint64_t *group = NULL;
1643 int flags = dn->dn_id_flags;
1645 boolean_t have_spill = B_FALSE;
1647 if (!dmu_objset_userused_enabled(dn->dn_objset))
1650 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
1651 DN_ID_CHKED_SPILL)))
1654 if (before && dn->dn_bonuslen != 0)
1655 data = DN_BONUS(dn->dn_phys);
1656 else if (!before && dn->dn_bonuslen != 0) {
1659 mutex_enter(&db->db_mtx);
1660 data = dmu_objset_userquota_find_data(db, tx);
1662 data = DN_BONUS(dn->dn_phys);
1664 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
1667 if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
1668 rf |= DB_RF_HAVESTRUCT;
1669 error = dmu_spill_hold_by_dnode(dn,
1670 rf | DB_RF_MUST_SUCCEED,
1671 FTAG, (dmu_buf_t **)&db);
1673 mutex_enter(&db->db_mtx);
1674 data = (before) ? db->db.db_data :
1675 dmu_objset_userquota_find_data(db, tx);
1676 have_spill = B_TRUE;
1678 mutex_enter(&dn->dn_mtx);
1679 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1680 mutex_exit(&dn->dn_mtx);
1686 user = &dn->dn_olduid;
1687 group = &dn->dn_oldgid;
1689 user = &dn->dn_newuid;
1690 group = &dn->dn_newgid;
1694 * Must always call the callback in case the object
1695 * type has changed and that type isn't an object type to track
1697 error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data,
1701 * Preserve existing uid/gid when the callback can't determine
1702 * what the new uid/gid are and the callback returned EEXIST.
1703 * The EEXIST error tells us to just use the existing uid/gid.
1704 * If we don't know what the old values are then just assign
1705 * them to 0, since that is a new file being created.
1707 if (!before && data == NULL && error == EEXIST) {
1708 if (flags & DN_ID_OLD_EXIST) {
1709 dn->dn_newuid = dn->dn_olduid;
1710 dn->dn_newgid = dn->dn_oldgid;
1719 mutex_exit(&db->db_mtx);
1721 mutex_enter(&dn->dn_mtx);
1722 if (error == 0 && before)
1723 dn->dn_id_flags |= DN_ID_OLD_EXIST;
1724 if (error == 0 && !before)
1725 dn->dn_id_flags |= DN_ID_NEW_EXIST;
1728 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
1730 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1732 mutex_exit(&dn->dn_mtx);
1734 dmu_buf_rele((dmu_buf_t *)db, FTAG);
1738 dmu_objset_userspace_present(objset_t *os)
1740 return (os->os_phys->os_flags &
1741 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
1745 dmu_objset_userspace_upgrade(objset_t *os)
1750 if (dmu_objset_userspace_present(os))
1752 if (!dmu_objset_userused_enabled(os))
1753 return (SET_ERROR(ENOTSUP));
1754 if (dmu_objset_is_snapshot(os))
1755 return (SET_ERROR(EINVAL));
1758 * We simply need to mark every object dirty, so that it will be
1759 * synced out and now accounted. If this is called
1760 * concurrently, or if we already did some work before crashing,
1761 * that's fine, since we track each object's accounted state
1765 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
1770 if (issig(JUSTLOOKING) && issig(FORREAL))
1771 return (SET_ERROR(EINTR));
1773 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
1776 tx = dmu_tx_create(os);
1777 dmu_tx_hold_bonus(tx, obj);
1778 objerr = dmu_tx_assign(tx, TXG_WAIT);
1783 dmu_buf_will_dirty(db, tx);
1784 dmu_buf_rele(db, FTAG);
1788 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1789 txg_wait_synced(dmu_objset_pool(os), 0);
1794 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
1795 uint64_t *usedobjsp, uint64_t *availobjsp)
1797 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
1798 usedobjsp, availobjsp);
1802 dmu_objset_fsid_guid(objset_t *os)
1804 return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
1808 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
1810 stat->dds_type = os->os_phys->os_type;
1811 if (os->os_dsl_dataset)
1812 dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
1816 dmu_objset_stats(objset_t *os, nvlist_t *nv)
1818 ASSERT(os->os_dsl_dataset ||
1819 os->os_phys->os_type == DMU_OST_META);
1821 if (os->os_dsl_dataset != NULL)
1822 dsl_dataset_stats(os->os_dsl_dataset, nv);
1824 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
1825 os->os_phys->os_type);
1826 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
1827 dmu_objset_userspace_present(os));
1831 dmu_objset_is_snapshot(objset_t *os)
1833 if (os->os_dsl_dataset != NULL)
1834 return (os->os_dsl_dataset->ds_is_snapshot);
1840 dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
1841 boolean_t *conflict)
1843 dsl_dataset_t *ds = os->os_dsl_dataset;
1846 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
1847 return (SET_ERROR(ENOENT));
1849 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
1850 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored,
1851 MT_NORMALIZE, real, maxlen, conflict));
1855 dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
1856 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
1858 dsl_dataset_t *ds = os->os_dsl_dataset;
1859 zap_cursor_t cursor;
1860 zap_attribute_t attr;
1862 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
1864 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
1865 return (SET_ERROR(ENOENT));
1867 zap_cursor_init_serialized(&cursor,
1868 ds->ds_dir->dd_pool->dp_meta_objset,
1869 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp);
1871 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1872 zap_cursor_fini(&cursor);
1873 return (SET_ERROR(ENOENT));
1876 if (strlen(attr.za_name) + 1 > namelen) {
1877 zap_cursor_fini(&cursor);
1878 return (SET_ERROR(ENAMETOOLONG));
1881 (void) strcpy(name, attr.za_name);
1883 *idp = attr.za_first_integer;
1885 *case_conflict = attr.za_normalization_conflict;
1886 zap_cursor_advance(&cursor);
1887 *offp = zap_cursor_serialize(&cursor);
1888 zap_cursor_fini(&cursor);
1894 dmu_dir_list_next(objset_t *os, int namelen, char *name,
1895 uint64_t *idp, uint64_t *offp)
1897 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
1898 zap_cursor_t cursor;
1899 zap_attribute_t attr;
1901 /* there is no next dir on a snapshot! */
1902 if (os->os_dsl_dataset->ds_object !=
1903 dsl_dir_phys(dd)->dd_head_dataset_obj)
1904 return (SET_ERROR(ENOENT));
1906 zap_cursor_init_serialized(&cursor,
1907 dd->dd_pool->dp_meta_objset,
1908 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp);
1910 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1911 zap_cursor_fini(&cursor);
1912 return (SET_ERROR(ENOENT));
1915 if (strlen(attr.za_name) + 1 > namelen) {
1916 zap_cursor_fini(&cursor);
1917 return (SET_ERROR(ENAMETOOLONG));
1920 (void) strcpy(name, attr.za_name);
1922 *idp = attr.za_first_integer;
1923 zap_cursor_advance(&cursor);
1924 *offp = zap_cursor_serialize(&cursor);
1925 zap_cursor_fini(&cursor);
1930 typedef struct dmu_objset_find_ctx {
1934 char *dc_ddname; /* last component of ddobj's name */
1935 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *);
1938 kmutex_t *dc_error_lock;
1940 } dmu_objset_find_ctx_t;
1943 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp)
1945 dsl_pool_t *dp = dcp->dc_dp;
1949 zap_attribute_t *attr;
1953 /* don't process if there already was an error */
1954 if (*dcp->dc_error != 0)
1958 * Note: passing the name (dc_ddname) here is optional, but it
1959 * improves performance because we don't need to call
1960 * zap_value_search() to determine the name.
1962 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd);
1966 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1967 if (dd->dd_myname[0] == '$') {
1968 dsl_dir_rele(dd, FTAG);
1972 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
1973 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
1976 * Iterate over all children.
1978 if (dcp->dc_flags & DS_FIND_CHILDREN) {
1979 for (zap_cursor_init(&zc, dp->dp_meta_objset,
1980 dsl_dir_phys(dd)->dd_child_dir_zapobj);
1981 zap_cursor_retrieve(&zc, attr) == 0;
1982 (void) zap_cursor_advance(&zc)) {
1983 ASSERT3U(attr->za_integer_length, ==,
1985 ASSERT3U(attr->za_num_integers, ==, 1);
1987 dmu_objset_find_ctx_t *child_dcp =
1988 kmem_alloc(sizeof (*child_dcp), KM_SLEEP);
1990 child_dcp->dc_ddobj = attr->za_first_integer;
1991 child_dcp->dc_ddname = spa_strdup(attr->za_name);
1992 if (dcp->dc_tq != NULL)
1993 (void) taskq_dispatch(dcp->dc_tq,
1994 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP);
1996 dmu_objset_find_dp_impl(child_dcp);
1998 zap_cursor_fini(&zc);
2002 * Iterate over all snapshots.
2004 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) {
2006 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2011 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2012 dsl_dataset_rele(ds, FTAG);
2014 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2015 zap_cursor_retrieve(&zc, attr) == 0;
2016 (void) zap_cursor_advance(&zc)) {
2017 ASSERT3U(attr->za_integer_length, ==,
2019 ASSERT3U(attr->za_num_integers, ==, 1);
2021 err = dsl_dataset_hold_obj(dp,
2022 attr->za_first_integer, FTAG, &ds);
2025 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2026 dsl_dataset_rele(ds, FTAG);
2030 zap_cursor_fini(&zc);
2034 kmem_free(attr, sizeof (zap_attribute_t));
2037 dsl_dir_rele(dd, FTAG);
2044 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2047 * Note: we hold the dir while calling dsl_dataset_hold_obj() so
2048 * that the dir will remain cached, and we won't have to re-instantiate
2049 * it (which could be expensive due to finding its name via
2050 * zap_value_search()).
2052 dsl_dir_rele(dd, FTAG);
2055 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2056 dsl_dataset_rele(ds, FTAG);
2060 mutex_enter(dcp->dc_error_lock);
2061 /* only keep first error */
2062 if (*dcp->dc_error == 0)
2063 *dcp->dc_error = err;
2064 mutex_exit(dcp->dc_error_lock);
2067 if (dcp->dc_ddname != NULL)
2068 spa_strfree(dcp->dc_ddname);
2069 kmem_free(dcp, sizeof (*dcp));
2073 dmu_objset_find_dp_cb(void *arg)
2075 dmu_objset_find_ctx_t *dcp = arg;
2076 dsl_pool_t *dp = dcp->dc_dp;
2079 * We need to get a pool_config_lock here, as there are several
2080 * asssert(pool_config_held) down the stack. Getting a lock via
2081 * dsl_pool_config_enter is risky, as it might be stalled by a
2082 * pending writer. This would deadlock, as the write lock can
2083 * only be granted when our parent thread gives up the lock.
2084 * The _prio interface gives us priority over a pending writer.
2086 dsl_pool_config_enter_prio(dp, FTAG);
2088 dmu_objset_find_dp_impl(dcp);
2090 dsl_pool_config_exit(dp, FTAG);
2094 * Find objsets under and including ddobj, call func(ds) on each.
2095 * The order for the enumeration is completely undefined.
2096 * func is called with dsl_pool_config held.
2099 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
2100 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
2105 dmu_objset_find_ctx_t *dcp;
2108 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL);
2109 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP);
2112 dcp->dc_ddobj = ddobj;
2113 dcp->dc_ddname = NULL;
2114 dcp->dc_func = func;
2116 dcp->dc_flags = flags;
2117 dcp->dc_error_lock = &err_lock;
2118 dcp->dc_error = &error;
2120 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) {
2122 * In case a write lock is held we can't make use of
2123 * parallelism, as down the stack of the worker threads
2124 * the lock is asserted via dsl_pool_config_held.
2125 * In case of a read lock this is solved by getting a read
2126 * lock in each worker thread, which isn't possible in case
2127 * of a writer lock. So we fall back to the synchronous path
2129 * In the future it might be possible to get some magic into
2130 * dsl_pool_config_held in a way that it returns true for
2131 * the worker threads so that a single lock held from this
2132 * thread suffices. For now, stay single threaded.
2134 dmu_objset_find_dp_impl(dcp);
2135 mutex_destroy(&err_lock);
2140 ntasks = dmu_find_threads;
2142 ntasks = vdev_count_leaves(dp->dp_spa) * 4;
2143 tq = taskq_create("dmu_objset_find", ntasks, minclsyspri, ntasks,
2146 kmem_free(dcp, sizeof (*dcp));
2147 mutex_destroy(&err_lock);
2149 return (SET_ERROR(ENOMEM));
2153 /* dcp will be freed by task */
2154 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP);
2157 * PORTING: this code relies on the property of taskq_wait to wait
2158 * until no more tasks are queued and no more tasks are active. As
2159 * we always queue new tasks from within other tasks, task_wait
2160 * reliably waits for the full recursion to finish, even though we
2161 * enqueue new tasks after taskq_wait has been called.
2162 * On platforms other than illumos, taskq_wait may not have this
2167 mutex_destroy(&err_lock);
2173 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
2174 * The dp_config_rwlock must not be held when this is called, and it
2175 * will not be held when the callback is called.
2176 * Therefore this function should only be used when the pool is not changing
2177 * (e.g. in syncing context), or the callback can deal with the possible races.
2180 dmu_objset_find_impl(spa_t *spa, const char *name,
2181 int func(const char *, void *), void *arg, int flags)
2184 dsl_pool_t *dp = spa_get_dsl(spa);
2187 zap_attribute_t *attr;
2192 dsl_pool_config_enter(dp, FTAG);
2194 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
2196 dsl_pool_config_exit(dp, FTAG);
2200 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2201 if (dd->dd_myname[0] == '$') {
2202 dsl_dir_rele(dd, FTAG);
2203 dsl_pool_config_exit(dp, FTAG);
2207 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2208 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2211 * Iterate over all children.
2213 if (flags & DS_FIND_CHILDREN) {
2214 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2215 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2216 zap_cursor_retrieve(&zc, attr) == 0;
2217 (void) zap_cursor_advance(&zc)) {
2218 ASSERT3U(attr->za_integer_length, ==,
2220 ASSERT3U(attr->za_num_integers, ==, 1);
2222 child = kmem_asprintf("%s/%s", name, attr->za_name);
2223 dsl_pool_config_exit(dp, FTAG);
2224 err = dmu_objset_find_impl(spa, child,
2226 dsl_pool_config_enter(dp, FTAG);
2231 zap_cursor_fini(&zc);
2234 dsl_dir_rele(dd, FTAG);
2235 dsl_pool_config_exit(dp, FTAG);
2236 kmem_free(attr, sizeof (zap_attribute_t));
2242 * Iterate over all snapshots.
2244 if (flags & DS_FIND_SNAPSHOTS) {
2245 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2250 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2251 dsl_dataset_rele(ds, FTAG);
2253 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2254 zap_cursor_retrieve(&zc, attr) == 0;
2255 (void) zap_cursor_advance(&zc)) {
2256 ASSERT3U(attr->za_integer_length, ==,
2258 ASSERT3U(attr->za_num_integers, ==, 1);
2260 child = kmem_asprintf("%s@%s",
2261 name, attr->za_name);
2262 dsl_pool_config_exit(dp, FTAG);
2263 err = func(child, arg);
2264 dsl_pool_config_enter(dp, FTAG);
2269 zap_cursor_fini(&zc);
2273 dsl_dir_rele(dd, FTAG);
2274 kmem_free(attr, sizeof (zap_attribute_t));
2275 dsl_pool_config_exit(dp, FTAG);
2280 /* Apply to self. */
2281 return (func(name, arg));
2285 * See comment above dmu_objset_find_impl().
2288 dmu_objset_find(char *name, int func(const char *, void *), void *arg,
2294 error = spa_open(name, &spa, FTAG);
2297 error = dmu_objset_find_impl(spa, name, func, arg, flags);
2298 spa_close(spa, FTAG);
2303 dmu_objset_set_user(objset_t *os, void *user_ptr)
2305 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2306 os->os_user_ptr = user_ptr;
2310 dmu_objset_get_user(objset_t *os)
2312 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2313 return (os->os_user_ptr);
2317 * Determine name of filesystem, given name of snapshot.
2318 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes
2321 dmu_fsname(const char *snapname, char *buf)
2323 char *atp = strchr(snapname, '@');
2325 return (SET_ERROR(EINVAL));
2326 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN)
2327 return (SET_ERROR(ENAMETOOLONG));
2328 (void) strlcpy(buf, snapname, atp - snapname + 1);
2333 * Call when we think we're going to write/free space in open context to track
2334 * the amount of dirty data in the open txg, which is also the amount
2335 * of memory that can not be evicted until this txg syncs.
2338 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx)
2340 dsl_dataset_t *ds = os->os_dsl_dataset;
2341 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space);
2344 dsl_dir_willuse_space(ds->ds_dir, aspace, tx);
2345 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx);