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 https://opensource.org/licenses/CDDL-1.0.
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, 2020 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) 2016 Actifio, Inc. All rights reserved.
30 * Copyright 2017 Nexenta Systems, Inc.
31 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
32 * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
33 * Copyright (c) 2019, Klara Inc.
34 * Copyright (c) 2019, Allan Jude
37 /* Portions Copyright 2010 Robert Milkowski */
40 #include <sys/zfs_context.h>
41 #include <sys/dmu_objset.h>
42 #include <sys/dsl_dir.h>
43 #include <sys/dsl_dataset.h>
44 #include <sys/dsl_prop.h>
45 #include <sys/dsl_pool.h>
46 #include <sys/dsl_synctask.h>
47 #include <sys/dsl_deleg.h>
48 #include <sys/dnode.h>
51 #include <sys/dmu_tx.h>
54 #include <sys/dmu_impl.h>
55 #include <sys/zfs_ioctl.h>
57 #include <sys/zfs_onexit.h>
58 #include <sys/dsl_destroy.h>
60 #include <sys/zfeature.h>
61 #include <sys/policy.h>
62 #include <sys/spa_impl.h>
63 #include <sys/dmu_recv.h>
64 #include <sys/zfs_project.h>
65 #include "zfs_namecheck.h"
66 #include <sys/vdev_impl.h>
70 * Needed to close a window in dnode_move() that allows the objset to be freed
71 * before it can be safely accessed.
76 * Tunable to overwrite the maximum number of threads for the parallelization
77 * of dmu_objset_find_dp, needed to speed up the import of pools with many
79 * Default is 4 times the number of leaf vdevs.
81 static const int dmu_find_threads = 0;
84 * Backfill lower metadnode objects after this many have been freed.
85 * Backfilling negatively impacts object creation rates, so only do it
86 * if there are enough holes to fill.
88 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT;
90 static const char *upgrade_tag = "upgrade_tag";
92 static void dmu_objset_find_dp_cb(void *arg);
94 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb);
95 static void dmu_objset_upgrade_stop(objset_t *os);
100 rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
104 dmu_objset_fini(void)
106 rw_destroy(&os_lock);
110 dmu_objset_spa(objset_t *os)
116 dmu_objset_zil(objset_t *os)
122 dmu_objset_pool(objset_t *os)
126 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
127 return (ds->ds_dir->dd_pool);
129 return (spa_get_dsl(os->os_spa));
133 dmu_objset_ds(objset_t *os)
135 return (os->os_dsl_dataset);
139 dmu_objset_type(objset_t *os)
141 return (os->os_phys->os_type);
145 dmu_objset_name(objset_t *os, char *buf)
147 dsl_dataset_name(os->os_dsl_dataset, buf);
151 dmu_objset_id(objset_t *os)
153 dsl_dataset_t *ds = os->os_dsl_dataset;
155 return (ds ? ds->ds_object : 0);
159 dmu_objset_dnodesize(objset_t *os)
161 return (os->os_dnodesize);
165 dmu_objset_syncprop(objset_t *os)
167 return (os->os_sync);
171 dmu_objset_logbias(objset_t *os)
173 return (os->os_logbias);
177 checksum_changed_cb(void *arg, uint64_t newval)
182 * Inheritance should have been done by now.
184 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
186 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
190 compression_changed_cb(void *arg, uint64_t newval)
195 * Inheritance and range checking should have been done by now.
197 ASSERT(newval != ZIO_COMPRESS_INHERIT);
199 os->os_compress = zio_compress_select(os->os_spa,
200 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON);
201 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress,
202 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT);
206 copies_changed_cb(void *arg, uint64_t newval)
211 * Inheritance and range checking should have been done by now.
214 ASSERT(newval <= spa_max_replication(os->os_spa));
216 os->os_copies = newval;
220 dedup_changed_cb(void *arg, uint64_t newval)
223 spa_t *spa = os->os_spa;
224 enum zio_checksum checksum;
227 * Inheritance should have been done by now.
229 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
231 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
233 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
234 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
238 primary_cache_changed_cb(void *arg, uint64_t newval)
243 * Inheritance and range checking should have been done by now.
245 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
246 newval == ZFS_CACHE_METADATA);
248 os->os_primary_cache = newval;
252 secondary_cache_changed_cb(void *arg, uint64_t newval)
257 * Inheritance and range checking should have been done by now.
259 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
260 newval == ZFS_CACHE_METADATA);
262 os->os_secondary_cache = newval;
266 sync_changed_cb(void *arg, uint64_t newval)
271 * Inheritance and range checking should have been done by now.
273 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
274 newval == ZFS_SYNC_DISABLED);
276 os->os_sync = newval;
278 zil_set_sync(os->os_zil, newval);
282 redundant_metadata_changed_cb(void *arg, uint64_t newval)
287 * Inheritance and range checking should have been done by now.
289 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
290 newval == ZFS_REDUNDANT_METADATA_MOST);
292 os->os_redundant_metadata = newval;
296 dnodesize_changed_cb(void *arg, uint64_t newval)
301 case ZFS_DNSIZE_LEGACY:
302 os->os_dnodesize = DNODE_MIN_SIZE;
304 case ZFS_DNSIZE_AUTO:
306 * Choose a dnode size that will work well for most
307 * workloads if the user specified "auto". Future code
308 * improvements could dynamically select a dnode size
309 * based on observed workload patterns.
311 os->os_dnodesize = DNODE_MIN_SIZE * 2;
318 os->os_dnodesize = newval;
324 smallblk_changed_cb(void *arg, uint64_t newval)
329 * Inheritance and range checking should have been done by now.
331 ASSERT(newval <= SPA_MAXBLOCKSIZE);
332 ASSERT(ISP2(newval));
334 os->os_zpl_special_smallblock = newval;
338 logbias_changed_cb(void *arg, uint64_t newval)
342 ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
343 newval == ZFS_LOGBIAS_THROUGHPUT);
344 os->os_logbias = newval;
346 zil_set_logbias(os->os_zil, newval);
350 recordsize_changed_cb(void *arg, uint64_t newval)
354 os->os_recordsize = newval;
358 dmu_objset_byteswap(void *buf, size_t size)
360 objset_phys_t *osp = buf;
362 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 ||
363 size == sizeof (objset_phys_t));
364 dnode_byteswap(&osp->os_meta_dnode);
365 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
366 osp->os_type = BSWAP_64(osp->os_type);
367 osp->os_flags = BSWAP_64(osp->os_flags);
368 if (size >= OBJSET_PHYS_SIZE_V2) {
369 dnode_byteswap(&osp->os_userused_dnode);
370 dnode_byteswap(&osp->os_groupused_dnode);
371 if (size >= sizeof (objset_phys_t))
372 dnode_byteswap(&osp->os_projectused_dnode);
377 * The hash is a CRC-based hash of the objset_t pointer and the object number.
380 dnode_hash(const objset_t *os, uint64_t obj)
382 uintptr_t osv = (uintptr_t)os;
383 uint64_t crc = -1ULL;
385 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
387 * The low 6 bits of the pointer don't have much entropy, because
388 * the objset_t is larger than 2^6 bytes long.
390 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
391 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
392 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
393 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF];
395 crc ^= (osv>>14) ^ (obj>>24);
401 dnode_multilist_index_func(multilist_t *ml, void *obj)
406 * The low order bits of the hash value are thought to be
407 * distributed evenly. Otherwise, in the case that the multilist
408 * has a power of two number of sublists, each sublists' usage
409 * would not be evenly distributed. In this context full 64bit
410 * division would be a waste of time, so limit it to 32 bits.
412 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) %
413 multilist_get_num_sublists(ml));
416 static inline boolean_t
417 dmu_os_is_l2cacheable(objset_t *os)
420 zfs_cache_type_t cache = os->os_secondary_cache;
421 blkptr_t *bp = os->os_rootbp;
423 if (bp != NULL && !BP_IS_HOLE(bp)) {
424 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva);
425 vdev_t *rvd = os->os_spa->spa_root_vdev;
427 if (vdev < rvd->vdev_children)
428 vd = rvd->vdev_child[vdev];
430 if (cache == ZFS_CACHE_ALL || cache == ZFS_CACHE_METADATA) {
434 if ((vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL &&
435 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) ||
436 l2arc_exclude_special == 0)
445 * Instantiates the objset_t in-memory structure corresponding to the
446 * objset_phys_t that's pointed to by the specified blkptr_t.
449 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
455 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
456 ASSERT(!BP_IS_REDACTED(bp));
459 * We need the pool config lock to get properties.
461 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool));
464 * The $ORIGIN dataset (if it exists) doesn't have an associated
465 * objset, so there's no reason to open it. The $ORIGIN dataset
466 * will not exist on pools older than SPA_VERSION_ORIGIN.
468 if (ds != NULL && spa_get_dsl(spa) != NULL &&
469 spa_get_dsl(spa)->dp_origin_snap != NULL) {
470 ASSERT3P(ds->ds_dir, !=,
471 spa_get_dsl(spa)->dp_origin_snap->ds_dir);
474 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
475 os->os_dsl_dataset = ds;
478 if (!BP_IS_HOLE(os->os_rootbp)) {
479 arc_flags_t aflags = ARC_FLAG_WAIT;
482 enum zio_flag zio_flags = ZIO_FLAG_CANFAIL;
483 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
484 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
486 if (dmu_os_is_l2cacheable(os))
487 aflags |= ARC_FLAG_L2CACHE;
489 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) {
490 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
491 ASSERT(BP_IS_AUTHENTICATED(bp));
492 zio_flags |= ZIO_FLAG_RAW;
495 dprintf_bp(os->os_rootbp, "reading %s", "");
496 err = arc_read(NULL, spa, os->os_rootbp,
497 arc_getbuf_func, &os->os_phys_buf,
498 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
500 kmem_free(os, sizeof (objset_t));
501 /* convert checksum errors into IO errors */
503 err = SET_ERROR(EIO);
507 if (spa_version(spa) < SPA_VERSION_USERSPACE)
508 size = OBJSET_PHYS_SIZE_V1;
509 else if (!spa_feature_is_enabled(spa,
510 SPA_FEATURE_PROJECT_QUOTA))
511 size = OBJSET_PHYS_SIZE_V2;
513 size = sizeof (objset_phys_t);
515 /* Increase the blocksize if we are permitted. */
516 if (arc_buf_size(os->os_phys_buf) < size) {
517 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf,
518 ARC_BUFC_METADATA, size);
519 memset(buf->b_data, 0, size);
520 memcpy(buf->b_data, os->os_phys_buf->b_data,
521 arc_buf_size(os->os_phys_buf));
522 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
523 os->os_phys_buf = buf;
526 os->os_phys = os->os_phys_buf->b_data;
527 os->os_flags = os->os_phys->os_flags;
529 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
530 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1;
531 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf,
532 ARC_BUFC_METADATA, size);
533 os->os_phys = os->os_phys_buf->b_data;
534 memset(os->os_phys, 0, size);
537 * These properties will be filled in by the logic in zfs_get_zplprop()
538 * when they are queried for the first time.
540 os->os_version = OBJSET_PROP_UNINITIALIZED;
541 os->os_normalization = OBJSET_PROP_UNINITIALIZED;
542 os->os_utf8only = OBJSET_PROP_UNINITIALIZED;
543 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED;
546 * Note: the changed_cb will be called once before the register
547 * func returns, thus changing the checksum/compression from the
548 * default (fletcher2/off). Snapshots don't need to know about
549 * checksum/compression/copies.
552 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0);
554 err = dsl_prop_register(ds,
555 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
556 primary_cache_changed_cb, os);
558 err = dsl_prop_register(ds,
559 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
560 secondary_cache_changed_cb, os);
562 if (!ds->ds_is_snapshot) {
564 err = dsl_prop_register(ds,
565 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
566 checksum_changed_cb, os);
569 err = dsl_prop_register(ds,
570 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
571 compression_changed_cb, os);
574 err = dsl_prop_register(ds,
575 zfs_prop_to_name(ZFS_PROP_COPIES),
576 copies_changed_cb, os);
579 err = dsl_prop_register(ds,
580 zfs_prop_to_name(ZFS_PROP_DEDUP),
581 dedup_changed_cb, os);
584 err = dsl_prop_register(ds,
585 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
586 logbias_changed_cb, os);
589 err = dsl_prop_register(ds,
590 zfs_prop_to_name(ZFS_PROP_SYNC),
591 sync_changed_cb, os);
594 err = dsl_prop_register(ds,
596 ZFS_PROP_REDUNDANT_METADATA),
597 redundant_metadata_changed_cb, os);
600 err = dsl_prop_register(ds,
601 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
602 recordsize_changed_cb, os);
605 err = dsl_prop_register(ds,
606 zfs_prop_to_name(ZFS_PROP_DNODESIZE),
607 dnodesize_changed_cb, os);
610 err = dsl_prop_register(ds,
612 ZFS_PROP_SPECIAL_SMALL_BLOCKS),
613 smallblk_changed_cb, os);
617 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
618 kmem_free(os, sizeof (objset_t));
622 /* It's the meta-objset. */
623 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
624 os->os_compress = ZIO_COMPRESS_ON;
625 os->os_complevel = ZIO_COMPLEVEL_DEFAULT;
626 os->os_encrypted = B_FALSE;
627 os->os_copies = spa_max_replication(spa);
628 os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
629 os->os_dedup_verify = B_FALSE;
630 os->os_logbias = ZFS_LOGBIAS_LATENCY;
631 os->os_sync = ZFS_SYNC_STANDARD;
632 os->os_primary_cache = ZFS_CACHE_ALL;
633 os->os_secondary_cache = ZFS_CACHE_ALL;
634 os->os_dnodesize = DNODE_MIN_SIZE;
637 if (ds == NULL || !ds->ds_is_snapshot)
638 os->os_zil_header = os->os_phys->os_zil_header;
639 os->os_zil = zil_alloc(os, &os->os_zil_header);
641 for (i = 0; i < TXG_SIZE; i++) {
642 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
643 offsetof(dnode_t, dn_dirty_link[i]),
644 dnode_multilist_index_func);
646 list_create(&os->os_dnodes, sizeof (dnode_t),
647 offsetof(dnode_t, dn_link));
648 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
649 offsetof(dmu_buf_impl_t, db_link));
651 list_link_init(&os->os_evicting_node);
653 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
654 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL);
655 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
656 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
657 os->os_obj_next_percpu_len = boot_ncpus;
658 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len *
659 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP);
661 dnode_special_open(os, &os->os_phys->os_meta_dnode,
662 DMU_META_DNODE_OBJECT, &os->os_meta_dnode);
663 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) {
664 dnode_special_open(os, &os->os_phys->os_userused_dnode,
665 DMU_USERUSED_OBJECT, &os->os_userused_dnode);
666 dnode_special_open(os, &os->os_phys->os_groupused_dnode,
667 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode);
668 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf))
669 dnode_special_open(os,
670 &os->os_phys->os_projectused_dnode,
671 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode);
674 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL);
681 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
686 * We need the pool_config lock to manipulate the dsl_dataset_t.
687 * Even if the dataset is long-held, we need the pool_config lock
688 * to open the objset, as it needs to get properties.
690 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
692 mutex_enter(&ds->ds_opening_lock);
693 if (ds->ds_objset == NULL) {
695 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
696 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
697 ds, dsl_dataset_get_blkptr(ds), &os);
698 rrw_exit(&ds->ds_bp_rwlock, FTAG);
701 mutex_enter(&ds->ds_lock);
702 ASSERT(ds->ds_objset == NULL);
704 mutex_exit(&ds->ds_lock);
707 *osp = ds->ds_objset;
708 mutex_exit(&ds->ds_opening_lock);
713 * Holds the pool while the objset is held. Therefore only one objset
714 * can be held at a time.
717 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag,
723 ds_hold_flags_t flags;
725 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
726 err = dsl_pool_hold(name, tag, &dp);
729 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds);
731 dsl_pool_rele(dp, tag);
735 err = dmu_objset_from_ds(ds, osp);
737 dsl_dataset_rele(ds, tag);
738 dsl_pool_rele(dp, tag);
745 dmu_objset_hold(const char *name, const void *tag, objset_t **osp)
747 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp));
751 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type,
752 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
756 int err = dmu_objset_from_ds(ds, osp);
759 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
760 return (SET_ERROR(EINVAL));
761 } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
762 return (SET_ERROR(EROFS));
763 } else if (!readonly && decrypt &&
764 dsl_dir_incompatible_encryption_version(ds->ds_dir)) {
765 return (SET_ERROR(EROFS));
768 /* if we are decrypting, we can now check MACs in os->os_phys_buf */
769 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) {
772 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT,
773 ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
774 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa,
779 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf));
786 * dsl_pool must not be held when this is called.
787 * Upon successful return, there will be a longhold on the dataset,
788 * and the dsl_pool will not be held.
791 dmu_objset_own(const char *name, dmu_objset_type_t type,
792 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
797 ds_hold_flags_t flags;
799 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
800 err = dsl_pool_hold(name, FTAG, &dp);
803 err = dsl_dataset_own(dp, name, flags, tag, &ds);
805 dsl_pool_rele(dp, FTAG);
808 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
810 dsl_dataset_disown(ds, flags, tag);
811 dsl_pool_rele(dp, FTAG);
816 * User accounting requires the dataset to be decrypted and rw.
817 * We also don't begin user accounting during claiming to help
818 * speed up pool import times and to keep this txg reserved
819 * completely for recovery work.
821 if (!readonly && !dp->dp_spa->spa_claiming &&
822 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) {
823 if (dmu_objset_userobjspace_upgradable(*osp) ||
824 dmu_objset_projectquota_upgradable(*osp)) {
825 dmu_objset_id_quota_upgrade(*osp);
826 } else if (dmu_objset_userused_enabled(*osp)) {
827 dmu_objset_userspace_upgrade(*osp);
831 dsl_pool_rele(dp, FTAG);
836 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
837 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
841 ds_hold_flags_t flags;
843 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
844 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds);
848 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
850 dsl_dataset_disown(ds, flags, tag);
858 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag)
860 ds_hold_flags_t flags;
861 dsl_pool_t *dp = dmu_objset_pool(os);
863 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
864 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag);
865 dsl_pool_rele(dp, tag);
869 dmu_objset_rele(objset_t *os, const void *tag)
871 dmu_objset_rele_flags(os, B_FALSE, tag);
875 * When we are called, os MUST refer to an objset associated with a dataset
876 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
877 * == tag. We will then release and reacquire ownership of the dataset while
878 * holding the pool config_rwlock to avoid intervening namespace or ownership
881 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
882 * release the hold on its dataset and acquire a new one on the dataset of the
883 * same name so that it can be partially torn down and reconstructed.
886 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
887 boolean_t decrypt, const void *tag)
890 char name[ZFS_MAX_DATASET_NAME_LEN];
891 ds_hold_flags_t flags;
893 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
894 VERIFY3P(ds, !=, NULL);
895 VERIFY3P(ds->ds_owner, ==, tag);
896 VERIFY(dsl_dataset_long_held(ds));
898 dsl_dataset_name(ds, name);
899 dp = ds->ds_dir->dd_pool;
900 dsl_pool_config_enter(dp, FTAG);
901 dsl_dataset_disown(ds, flags, tag);
902 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds));
903 dsl_pool_config_exit(dp, FTAG);
907 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag)
909 ds_hold_flags_t flags;
911 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
913 * Stop upgrading thread
915 dmu_objset_upgrade_stop(os);
916 dsl_dataset_disown(os->os_dsl_dataset, flags, tag);
920 dmu_objset_evict_dbufs(objset_t *os)
925 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP);
927 mutex_enter(&os->os_lock);
928 dn = list_head(&os->os_dnodes);
931 * Skip dnodes without holds. We have to do this dance
932 * because dnode_add_ref() only works if there is already a
933 * hold. If the dnode has no holds, then it has no dbufs.
935 if (dnode_add_ref(dn, FTAG)) {
936 list_insert_after(&os->os_dnodes, dn, dn_marker);
937 mutex_exit(&os->os_lock);
939 dnode_evict_dbufs(dn);
940 dnode_rele(dn, FTAG);
942 mutex_enter(&os->os_lock);
943 dn = list_next(&os->os_dnodes, dn_marker);
944 list_remove(&os->os_dnodes, dn_marker);
946 dn = list_next(&os->os_dnodes, dn);
949 mutex_exit(&os->os_lock);
951 kmem_free(dn_marker, sizeof (dnode_t));
953 if (DMU_USERUSED_DNODE(os) != NULL) {
954 if (DMU_PROJECTUSED_DNODE(os) != NULL)
955 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os));
956 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os));
957 dnode_evict_dbufs(DMU_USERUSED_DNODE(os));
959 dnode_evict_dbufs(DMU_META_DNODE(os));
963 * Objset eviction processing is split into into two pieces.
964 * The first marks the objset as evicting, evicts any dbufs that
965 * have a refcount of zero, and then queues up the objset for the
966 * second phase of eviction. Once os->os_dnodes has been cleared by
967 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed.
968 * The second phase closes the special dnodes, dequeues the objset from
969 * the list of those undergoing eviction, and finally frees the objset.
971 * NOTE: Due to asynchronous eviction processing (invocation of
972 * dnode_buf_pageout()), it is possible for the meta dnode for the
973 * objset to have no holds even though os->os_dnodes is not empty.
976 dmu_objset_evict(objset_t *os)
978 dsl_dataset_t *ds = os->os_dsl_dataset;
980 for (int t = 0; t < TXG_SIZE; t++)
981 ASSERT(!dmu_objset_is_dirty(os, t));
984 dsl_prop_unregister_all(ds, os);
989 dmu_objset_evict_dbufs(os);
991 mutex_enter(&os->os_lock);
992 spa_evicting_os_register(os->os_spa, os);
993 if (list_is_empty(&os->os_dnodes)) {
994 mutex_exit(&os->os_lock);
995 dmu_objset_evict_done(os);
997 mutex_exit(&os->os_lock);
1004 dmu_objset_evict_done(objset_t *os)
1006 ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
1008 dnode_special_close(&os->os_meta_dnode);
1009 if (DMU_USERUSED_DNODE(os)) {
1010 if (DMU_PROJECTUSED_DNODE(os))
1011 dnode_special_close(&os->os_projectused_dnode);
1012 dnode_special_close(&os->os_userused_dnode);
1013 dnode_special_close(&os->os_groupused_dnode);
1015 zil_free(os->os_zil);
1017 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
1020 * This is a barrier to prevent the objset from going away in
1021 * dnode_move() until we can safely ensure that the objset is still in
1022 * use. We consider the objset valid before the barrier and invalid
1023 * after the barrier.
1025 rw_enter(&os_lock, RW_READER);
1028 kmem_free(os->os_obj_next_percpu,
1029 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0]));
1031 mutex_destroy(&os->os_lock);
1032 mutex_destroy(&os->os_userused_lock);
1033 mutex_destroy(&os->os_obj_lock);
1034 mutex_destroy(&os->os_user_ptr_lock);
1035 mutex_destroy(&os->os_upgrade_lock);
1036 for (int i = 0; i < TXG_SIZE; i++)
1037 multilist_destroy(&os->os_dirty_dnodes[i]);
1038 spa_evicting_os_deregister(os->os_spa, os);
1039 kmem_free(os, sizeof (objset_t));
1043 dmu_objset_snap_cmtime(objset_t *os)
1045 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
1049 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1050 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx)
1055 ASSERT(dmu_tx_is_syncing(tx));
1058 blksz = DNODE_BLOCK_SIZE;
1060 ibs = DN_MAX_INDBLKSHIFT;
1063 VERIFY0(dmu_objset_from_ds(ds, &os));
1065 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
1067 mdn = DMU_META_DNODE(os);
1069 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0,
1070 DNODE_MIN_SLOTS, tx);
1073 * We don't want to have to increase the meta-dnode's nlevels
1074 * later, because then we could do it in quiescing context while
1075 * we are also accessing it in open context.
1077 * This precaution is not necessary for the MOS (ds == NULL),
1078 * because the MOS is only updated in syncing context.
1079 * This is most fortunate: the MOS is the only objset that
1080 * needs to be synced multiple times as spa_sync() iterates
1081 * to convergence, so minimizing its dn_nlevels matters.
1088 * Determine the number of levels necessary for the
1089 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note
1090 * that in order to ensure that we do not overflow
1091 * 64 bits, there has to be a nlevels that gives us a
1092 * number of blocks > DN_MAX_OBJECT but < 2^64.
1093 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)
1094 * (10) must be less than (64 - log2(DN_MAX_OBJECT))
1097 while ((uint64_t)mdn->dn_nblkptr <<
1098 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) *
1099 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
1104 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
1105 mdn->dn_nlevels = levels;
1108 ASSERT(type != DMU_OST_NONE);
1109 ASSERT(type != DMU_OST_ANY);
1110 ASSERT(type < DMU_OST_NUMTYPES);
1111 os->os_phys->os_type = type;
1114 * Enable user accounting if it is enabled and this is not an
1115 * encrypted receive.
1117 if (dmu_objset_userused_enabled(os) &&
1118 (!os->os_encrypted || !dmu_objset_is_receiving(os))) {
1119 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1120 if (dmu_objset_userobjused_enabled(os)) {
1121 ds->ds_feature_activation[
1122 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
1123 os->os_phys->os_flags |=
1124 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
1126 if (dmu_objset_projectquota_enabled(os)) {
1127 ds->ds_feature_activation[
1128 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
1129 os->os_phys->os_flags |=
1130 OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
1132 os->os_flags = os->os_phys->os_flags;
1135 dsl_dataset_dirty(ds, tx);
1140 /* called from dsl for meta-objset */
1142 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1143 dmu_objset_type_t type, dmu_tx_t *tx)
1145 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx));
1148 typedef struct dmu_objset_create_arg {
1149 const char *doca_name;
1152 void (*doca_userfunc)(objset_t *os, void *arg,
1153 cred_t *cr, dmu_tx_t *tx);
1155 dmu_objset_type_t doca_type;
1156 uint64_t doca_flags;
1157 dsl_crypto_params_t *doca_dcp;
1158 } dmu_objset_create_arg_t;
1161 dmu_objset_create_check(void *arg, dmu_tx_t *tx)
1163 dmu_objset_create_arg_t *doca = arg;
1164 dsl_pool_t *dp = dmu_tx_pool(tx);
1166 dsl_dataset_t *parentds;
1171 if (strchr(doca->doca_name, '@') != NULL)
1172 return (SET_ERROR(EINVAL));
1174 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN)
1175 return (SET_ERROR(ENAMETOOLONG));
1177 if (dataset_nestcheck(doca->doca_name) != 0)
1178 return (SET_ERROR(ENAMETOOLONG));
1180 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
1184 dsl_dir_rele(pdd, FTAG);
1185 return (SET_ERROR(EEXIST));
1188 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL);
1190 dsl_dir_rele(pdd, FTAG);
1194 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1195 doca->doca_cred, doca->doca_proc);
1197 dsl_dir_rele(pdd, FTAG);
1201 /* can't create below anything but filesystems (eg. no ZVOLs) */
1202 error = dsl_dataset_hold_obj(pdd->dd_pool,
1203 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds);
1205 dsl_dir_rele(pdd, FTAG);
1208 error = dmu_objset_from_ds(parentds, &parentos);
1210 dsl_dataset_rele(parentds, FTAG);
1211 dsl_dir_rele(pdd, FTAG);
1214 if (dmu_objset_type(parentos) != DMU_OST_ZFS) {
1215 dsl_dataset_rele(parentds, FTAG);
1216 dsl_dir_rele(pdd, FTAG);
1217 return (SET_ERROR(ZFS_ERR_WRONG_PARENT));
1219 dsl_dataset_rele(parentds, FTAG);
1220 dsl_dir_rele(pdd, FTAG);
1226 dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
1228 dmu_objset_create_arg_t *doca = arg;
1229 dsl_pool_t *dp = dmu_tx_pool(tx);
1230 spa_t *spa = dp->dp_spa;
1239 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
1241 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
1242 doca->doca_cred, doca->doca_dcp, tx);
1244 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj,
1245 DS_HOLD_FLAG_DECRYPT, FTAG, &ds));
1246 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
1247 bp = dsl_dataset_get_blkptr(ds);
1248 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx);
1249 rrw_exit(&ds->ds_bp_rwlock, FTAG);
1251 if (doca->doca_userfunc != NULL) {
1252 doca->doca_userfunc(os, doca->doca_userarg,
1253 doca->doca_cred, tx);
1257 * The doca_userfunc() may write out some data that needs to be
1258 * encrypted if the dataset is encrypted (specifically the root
1259 * directory). This data must be written out before the encryption
1260 * key mapping is removed by dsl_dataset_rele_flags(). Force the
1261 * I/O to occur immediately by invoking the relevant sections of
1264 if (os->os_encrypted) {
1265 dsl_dataset_t *tmpds = NULL;
1266 boolean_t need_sync_done = B_FALSE;
1268 mutex_enter(&ds->ds_lock);
1269 ds->ds_owner = FTAG;
1270 mutex_exit(&ds->ds_lock);
1272 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1273 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1275 if (tmpds != NULL) {
1276 dsl_dataset_sync(ds, rzio, tx);
1277 need_sync_done = B_TRUE;
1279 VERIFY0(zio_wait(rzio));
1281 dmu_objset_sync_done(os, tx);
1282 taskq_wait(dp->dp_sync_taskq);
1283 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) {
1284 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1285 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1288 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1289 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1291 if (tmpds != NULL) {
1292 dmu_buf_rele(ds->ds_dbuf, ds);
1293 dsl_dataset_sync(ds, rzio, tx);
1295 VERIFY0(zio_wait(rzio));
1297 if (need_sync_done) {
1298 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1299 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1300 dsl_dataset_sync_done(ds, tx);
1303 mutex_enter(&ds->ds_lock);
1304 ds->ds_owner = NULL;
1305 mutex_exit(&ds->ds_lock);
1308 spa_history_log_internal_ds(ds, "create", tx, " ");
1310 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG);
1311 dsl_dir_rele(pdd, FTAG);
1315 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
1316 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg)
1318 dmu_objset_create_arg_t doca;
1319 dsl_crypto_params_t tmp_dcp = { 0 };
1321 doca.doca_name = name;
1322 doca.doca_cred = CRED();
1323 doca.doca_proc = curproc;
1324 doca.doca_flags = flags;
1325 doca.doca_userfunc = func;
1326 doca.doca_userarg = arg;
1327 doca.doca_type = type;
1330 * Some callers (mostly for testing) do not provide a dcp on their
1331 * own but various code inside the sync task will require it to be
1332 * allocated. Rather than adding NULL checks throughout this code
1333 * or adding dummy dcp's to all of the callers we simply create a
1334 * dummy one here and use that. This zero dcp will have the same
1335 * effect as asking for inheritance of all encryption params.
1337 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp;
1339 int rv = dsl_sync_task(name,
1340 dmu_objset_create_check, dmu_objset_create_sync, &doca,
1341 6, ZFS_SPACE_CHECK_NORMAL);
1344 zvol_create_minor(name);
1348 typedef struct dmu_objset_clone_arg {
1349 const char *doca_clone;
1350 const char *doca_origin;
1353 } dmu_objset_clone_arg_t;
1356 dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
1358 dmu_objset_clone_arg_t *doca = arg;
1362 dsl_dataset_t *origin;
1363 dsl_pool_t *dp = dmu_tx_pool(tx);
1365 if (strchr(doca->doca_clone, '@') != NULL)
1366 return (SET_ERROR(EINVAL));
1368 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN)
1369 return (SET_ERROR(ENAMETOOLONG));
1371 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
1375 dsl_dir_rele(pdd, FTAG);
1376 return (SET_ERROR(EEXIST));
1379 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1380 doca->doca_cred, doca->doca_proc);
1382 dsl_dir_rele(pdd, FTAG);
1383 return (SET_ERROR(EDQUOT));
1386 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
1388 dsl_dir_rele(pdd, FTAG);
1392 /* You can only clone snapshots, not the head datasets. */
1393 if (!origin->ds_is_snapshot) {
1394 dsl_dataset_rele(origin, FTAG);
1395 dsl_dir_rele(pdd, FTAG);
1396 return (SET_ERROR(EINVAL));
1399 dsl_dataset_rele(origin, FTAG);
1400 dsl_dir_rele(pdd, FTAG);
1406 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
1408 dmu_objset_clone_arg_t *doca = arg;
1409 dsl_pool_t *dp = dmu_tx_pool(tx);
1412 dsl_dataset_t *origin, *ds;
1414 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
1416 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
1417 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
1419 obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
1420 doca->doca_cred, NULL, tx);
1422 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
1423 dsl_dataset_name(origin, namebuf);
1424 spa_history_log_internal_ds(ds, "clone", tx,
1425 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object);
1426 dsl_dataset_rele(ds, FTAG);
1427 dsl_dataset_rele(origin, FTAG);
1428 dsl_dir_rele(pdd, FTAG);
1432 dmu_objset_clone(const char *clone, const char *origin)
1434 dmu_objset_clone_arg_t doca;
1436 doca.doca_clone = clone;
1437 doca.doca_origin = origin;
1438 doca.doca_cred = CRED();
1439 doca.doca_proc = curproc;
1441 int rv = dsl_sync_task(clone,
1442 dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
1443 6, ZFS_SPACE_CHECK_NORMAL);
1446 zvol_create_minor(clone);
1452 dmu_objset_snapshot_one(const char *fsname, const char *snapname)
1455 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
1456 nvlist_t *snaps = fnvlist_alloc();
1458 fnvlist_add_boolean(snaps, longsnap);
1459 kmem_strfree(longsnap);
1460 err = dsl_dataset_snapshot(snaps, NULL, NULL);
1461 fnvlist_free(snaps);
1466 dmu_objset_upgrade_task_cb(void *data)
1468 objset_t *os = data;
1470 mutex_enter(&os->os_upgrade_lock);
1471 os->os_upgrade_status = EINTR;
1472 if (!os->os_upgrade_exit) {
1475 mutex_exit(&os->os_upgrade_lock);
1477 status = os->os_upgrade_cb(os);
1479 mutex_enter(&os->os_upgrade_lock);
1481 os->os_upgrade_status = status;
1483 os->os_upgrade_exit = B_TRUE;
1484 os->os_upgrade_id = 0;
1485 mutex_exit(&os->os_upgrade_lock);
1486 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1490 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb)
1492 if (os->os_upgrade_id != 0)
1495 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
1496 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag);
1498 mutex_enter(&os->os_upgrade_lock);
1499 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) {
1500 os->os_upgrade_exit = B_FALSE;
1501 os->os_upgrade_cb = cb;
1502 os->os_upgrade_id = taskq_dispatch(
1503 os->os_spa->spa_upgrade_taskq,
1504 dmu_objset_upgrade_task_cb, os, TQ_SLEEP);
1505 if (os->os_upgrade_id == TASKQID_INVALID) {
1506 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1507 os->os_upgrade_status = ENOMEM;
1510 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1512 mutex_exit(&os->os_upgrade_lock);
1516 dmu_objset_upgrade_stop(objset_t *os)
1518 mutex_enter(&os->os_upgrade_lock);
1519 os->os_upgrade_exit = B_TRUE;
1520 if (os->os_upgrade_id != 0) {
1521 taskqid_t id = os->os_upgrade_id;
1523 os->os_upgrade_id = 0;
1524 mutex_exit(&os->os_upgrade_lock);
1526 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) {
1527 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1529 txg_wait_synced(os->os_spa->spa_dsl_pool, 0);
1531 mutex_exit(&os->os_upgrade_lock);
1536 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx)
1540 while ((dn = multilist_sublist_head(list)) != NULL) {
1541 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
1542 ASSERT(dn->dn_dbuf->db_data_pending);
1544 * Initialize dn_zio outside dnode_sync() because the
1545 * meta-dnode needs to set it outside dnode_sync().
1547 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
1550 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
1551 multilist_sublist_remove(list, dn);
1554 * See the comment above dnode_rele_task() for an explanation
1555 * of why this dnode hold is always needed (even when not
1556 * doing user accounting).
1558 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes;
1559 (void) dnode_add_ref(dn, newlist);
1560 multilist_insert(newlist, dn);
1567 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
1570 blkptr_t *bp = zio->io_bp;
1572 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
1575 ASSERT(!BP_IS_EMBEDDED(bp));
1576 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
1577 ASSERT0(BP_GET_LEVEL(bp));
1580 * Update rootbp fill count: it should be the number of objects
1581 * allocated in the object set (not counting the "special"
1582 * objects that are stored in the objset_phys_t -- the meta
1583 * dnode and user/group/project accounting objects).
1585 for (int i = 0; i < dnp->dn_nblkptr; i++)
1586 fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
1588 BP_SET_FILL(bp, fill);
1590 if (os->os_dsl_dataset != NULL)
1591 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG);
1592 *os->os_rootbp = *bp;
1593 if (os->os_dsl_dataset != NULL)
1594 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG);
1598 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
1601 blkptr_t *bp = zio->io_bp;
1602 blkptr_t *bp_orig = &zio->io_bp_orig;
1605 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
1606 ASSERT(BP_EQUAL(bp, bp_orig));
1608 dsl_dataset_t *ds = os->os_dsl_dataset;
1609 dmu_tx_t *tx = os->os_synctx;
1611 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
1612 dsl_dataset_block_born(ds, bp, tx);
1614 kmem_free(bp, sizeof (*bp));
1617 typedef struct sync_dnodes_arg {
1618 multilist_t *sda_list;
1619 int sda_sublist_idx;
1620 multilist_t *sda_newlist;
1622 } sync_dnodes_arg_t;
1625 sync_dnodes_task(void *arg)
1627 sync_dnodes_arg_t *sda = arg;
1629 multilist_sublist_t *ms =
1630 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx);
1632 dmu_objset_sync_dnodes(ms, sda->sda_tx);
1634 multilist_sublist_unlock(ms);
1636 kmem_free(sda, sizeof (*sda));
1640 /* called from dsl */
1642 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
1645 zbookmark_phys_t zb;
1649 dbuf_dirty_record_t *dr;
1652 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP);
1653 *blkptr_copy = *os->os_rootbp;
1655 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg);
1657 ASSERT(dmu_tx_is_syncing(tx));
1658 /* XXX the write_done callback should really give us the tx... */
1661 if (os->os_dsl_dataset == NULL) {
1663 * This is the MOS. If we have upgraded,
1664 * spa_max_replication() could change, so reset
1667 os->os_copies = spa_max_replication(os->os_spa);
1671 * Create the root block IO
1673 SET_BOOKMARK(&zb, os->os_dsl_dataset ?
1674 os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
1675 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
1676 arc_release(os->os_phys_buf, &os->os_phys_buf);
1678 dmu_write_policy(os, NULL, 0, 0, &zp);
1681 * If we are either claiming the ZIL or doing a raw receive, write
1682 * out the os_phys_buf raw. Neither of these actions will effect the
1683 * MAC at this point.
1685 if (os->os_raw_receive ||
1686 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) {
1687 ASSERT(os->os_encrypted);
1688 arc_convert_to_raw(os->os_phys_buf,
1689 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER,
1690 DMU_OT_OBJSET, NULL, NULL, NULL);
1693 zio = arc_write(pio, os->os_spa, tx->tx_txg,
1694 blkptr_copy, os->os_phys_buf, dmu_os_is_l2cacheable(os),
1695 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done,
1696 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
1699 * In the codepath dsl_dataset_sync()->dmu_objset_sync() we cannot
1700 * rely on the zio above completing and calling back
1701 * dmu_objset_write_done()->dsl_dataset_block_born() before
1702 * dsl_dataset_sync() actually activates feature flags near its end.
1703 * Decide here if any features need to be activated, before
1704 * dsl_dataset_sync() completes its run.
1706 dsl_dataset_feature_set_activation(blkptr_copy, os->os_dsl_dataset);
1709 * Sync special dnodes - the parent IO for the sync is the root block
1711 DMU_META_DNODE(os)->dn_zio = zio;
1712 dnode_sync(DMU_META_DNODE(os), tx);
1714 os->os_phys->os_flags = os->os_flags;
1716 if (DMU_USERUSED_DNODE(os) &&
1717 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1718 DMU_USERUSED_DNODE(os)->dn_zio = zio;
1719 dnode_sync(DMU_USERUSED_DNODE(os), tx);
1720 DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
1721 dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
1724 if (DMU_PROJECTUSED_DNODE(os) &&
1725 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1726 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio;
1727 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx);
1730 txgoff = tx->tx_txg & TXG_MASK;
1733 * We must create the list here because it uses the
1734 * dn_dirty_link[] of this txg. But it may already
1735 * exist because we call dsl_dataset_sync() twice per txg.
1737 if (os->os_synced_dnodes.ml_sublists == NULL) {
1738 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t),
1739 offsetof(dnode_t, dn_dirty_link[txgoff]),
1740 dnode_multilist_index_func);
1742 ASSERT3U(os->os_synced_dnodes.ml_offset, ==,
1743 offsetof(dnode_t, dn_dirty_link[txgoff]));
1746 ml = &os->os_dirty_dnodes[txgoff];
1747 num_sublists = multilist_get_num_sublists(ml);
1748 for (int i = 0; i < num_sublists; i++) {
1749 if (multilist_sublist_is_empty_idx(ml, i))
1751 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP);
1753 sda->sda_sublist_idx = i;
1755 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
1756 sync_dnodes_task, sda, 0);
1757 /* callback frees sda */
1759 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq);
1761 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
1762 while ((dr = list_head(list)) != NULL) {
1763 ASSERT0(dr->dr_dbuf->db_level);
1764 list_remove(list, dr);
1765 zio_nowait(dr->dr_zio);
1768 /* Enable dnode backfill if enough objects have been freed. */
1769 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) {
1770 os->os_rescan_dnodes = B_TRUE;
1771 os->os_freed_dnodes = 0;
1775 * Free intent log blocks up to this tx.
1777 zil_sync(os->os_zil, tx);
1778 os->os_phys->os_zil_header = os->os_zil_header;
1783 dmu_objset_is_dirty(objset_t *os, uint64_t txg)
1785 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]));
1788 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES];
1791 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb)
1797 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data,
1798 zfs_file_info_t *zfi)
1800 file_info_cb_t *cb = file_cbs[os->os_phys->os_type];
1803 return (cb(bonustype, data, zfi));
1807 dmu_objset_userused_enabled(objset_t *os)
1809 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1810 file_cbs[os->os_phys->os_type] != NULL &&
1811 DMU_USERUSED_DNODE(os) != NULL);
1815 dmu_objset_userobjused_enabled(objset_t *os)
1817 return (dmu_objset_userused_enabled(os) &&
1818 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING));
1822 dmu_objset_projectquota_enabled(objset_t *os)
1824 return (file_cbs[os->os_phys->os_type] != NULL &&
1825 DMU_PROJECTUSED_DNODE(os) != NULL &&
1826 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA));
1829 typedef struct userquota_node {
1830 /* must be in the first filed, see userquota_update_cache() */
1831 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN];
1833 avl_node_t uqn_node;
1836 typedef struct userquota_cache {
1837 avl_tree_t uqc_user_deltas;
1838 avl_tree_t uqc_group_deltas;
1839 avl_tree_t uqc_project_deltas;
1840 } userquota_cache_t;
1843 userquota_compare(const void *l, const void *r)
1845 const userquota_node_t *luqn = l;
1846 const userquota_node_t *ruqn = r;
1850 * NB: can only access uqn_id because userquota_update_cache() doesn't
1851 * pass in an entire userquota_node_t.
1853 rv = strcmp(luqn->uqn_id, ruqn->uqn_id);
1855 return (TREE_ISIGN(rv));
1859 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx)
1862 userquota_node_t *uqn;
1864 ASSERT(dmu_tx_is_syncing(tx));
1867 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas,
1868 &cookie)) != NULL) {
1870 * os_userused_lock protects against concurrent calls to
1871 * zap_increment_int(). It's needed because zap_increment_int()
1872 * is not thread-safe (i.e. not atomic).
1874 mutex_enter(&os->os_userused_lock);
1875 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT,
1876 uqn->uqn_id, uqn->uqn_delta, tx));
1877 mutex_exit(&os->os_userused_lock);
1878 kmem_free(uqn, sizeof (*uqn));
1880 avl_destroy(&cache->uqc_user_deltas);
1883 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas,
1884 &cookie)) != NULL) {
1885 mutex_enter(&os->os_userused_lock);
1886 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT,
1887 uqn->uqn_id, uqn->uqn_delta, tx));
1888 mutex_exit(&os->os_userused_lock);
1889 kmem_free(uqn, sizeof (*uqn));
1891 avl_destroy(&cache->uqc_group_deltas);
1893 if (dmu_objset_projectquota_enabled(os)) {
1895 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas,
1896 &cookie)) != NULL) {
1897 mutex_enter(&os->os_userused_lock);
1898 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT,
1899 uqn->uqn_id, uqn->uqn_delta, tx));
1900 mutex_exit(&os->os_userused_lock);
1901 kmem_free(uqn, sizeof (*uqn));
1903 avl_destroy(&cache->uqc_project_deltas);
1908 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta)
1910 userquota_node_t *uqn;
1913 ASSERT(strlen(id) < sizeof (uqn->uqn_id));
1915 * Use id directly for searching because uqn_id is the first field of
1916 * userquota_node_t and fields after uqn_id won't be accessed in
1919 uqn = avl_find(avl, (const void *)id, &idx);
1921 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP);
1922 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id));
1923 avl_insert(avl, uqn, idx);
1925 uqn->uqn_delta += delta;
1929 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used,
1930 uint64_t flags, uint64_t user, uint64_t group, uint64_t project,
1933 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) {
1934 int64_t delta = DNODE_MIN_SIZE + used;
1940 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user);
1941 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
1943 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group);
1944 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
1946 if (dmu_objset_projectquota_enabled(os)) {
1947 (void) snprintf(name, sizeof (name), "%llx",
1948 (longlong_t)project);
1949 userquota_update_cache(&cache->uqc_project_deltas,
1956 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags,
1957 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract)
1959 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) {
1960 char name[20 + DMU_OBJACCT_PREFIX_LEN];
1961 int delta = subtract ? -1 : 1;
1963 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
1965 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
1967 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
1969 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
1971 if (dmu_objset_projectquota_enabled(os)) {
1972 (void) snprintf(name, sizeof (name),
1973 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project);
1974 userquota_update_cache(&cache->uqc_project_deltas,
1980 typedef struct userquota_updates_arg {
1982 int uua_sublist_idx;
1984 } userquota_updates_arg_t;
1987 userquota_updates_task(void *arg)
1989 userquota_updates_arg_t *uua = arg;
1990 objset_t *os = uua->uua_os;
1991 dmu_tx_t *tx = uua->uua_tx;
1993 userquota_cache_t cache = { { 0 } };
1995 multilist_sublist_t *list =
1996 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
1998 ASSERT(multilist_sublist_head(list) == NULL ||
1999 dmu_objset_userused_enabled(os));
2000 avl_create(&cache.uqc_user_deltas, userquota_compare,
2001 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
2002 avl_create(&cache.uqc_group_deltas, userquota_compare,
2003 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
2004 if (dmu_objset_projectquota_enabled(os))
2005 avl_create(&cache.uqc_project_deltas, userquota_compare,
2006 sizeof (userquota_node_t), offsetof(userquota_node_t,
2009 while ((dn = multilist_sublist_head(list)) != NULL) {
2011 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
2012 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
2013 dn->dn_phys->dn_flags &
2014 DNODE_FLAG_USERUSED_ACCOUNTED);
2016 flags = dn->dn_id_flags;
2018 if (flags & DN_ID_OLD_EXIST) {
2019 do_userquota_update(os, &cache, dn->dn_oldused,
2020 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid,
2021 dn->dn_oldprojid, B_TRUE);
2022 do_userobjquota_update(os, &cache, dn->dn_oldflags,
2023 dn->dn_olduid, dn->dn_oldgid,
2024 dn->dn_oldprojid, B_TRUE);
2026 if (flags & DN_ID_NEW_EXIST) {
2027 do_userquota_update(os, &cache,
2028 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags,
2029 dn->dn_newuid, dn->dn_newgid,
2030 dn->dn_newprojid, B_FALSE);
2031 do_userobjquota_update(os, &cache,
2032 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid,
2033 dn->dn_newprojid, B_FALSE);
2036 mutex_enter(&dn->dn_mtx);
2038 dn->dn_oldflags = 0;
2039 if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
2040 dn->dn_olduid = dn->dn_newuid;
2041 dn->dn_oldgid = dn->dn_newgid;
2042 dn->dn_oldprojid = dn->dn_newprojid;
2043 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2044 if (dn->dn_bonuslen == 0)
2045 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2047 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2049 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
2050 mutex_exit(&dn->dn_mtx);
2052 multilist_sublist_remove(list, dn);
2053 dnode_rele(dn, &os->os_synced_dnodes);
2055 do_userquota_cacheflush(os, &cache, tx);
2056 multilist_sublist_unlock(list);
2057 kmem_free(uua, sizeof (*uua));
2061 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being
2062 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be
2063 * evicted because the block containing the dnode can't be evicted until it is
2064 * written out. However, this hold is necessary to prevent the dnode_t from
2065 * being moved (via dnode_move()) while it's still referenced by
2066 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for
2067 * dirty_lightweight_leaf-type dirty records.
2069 * If we are doing user-object accounting, the dnode_rele() happens from
2070 * userquota_updates_task() instead.
2073 dnode_rele_task(void *arg)
2075 userquota_updates_arg_t *uua = arg;
2076 objset_t *os = uua->uua_os;
2078 multilist_sublist_t *list =
2079 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
2082 while ((dn = multilist_sublist_head(list)) != NULL) {
2083 multilist_sublist_remove(list, dn);
2084 dnode_rele(dn, &os->os_synced_dnodes);
2086 multilist_sublist_unlock(list);
2087 kmem_free(uua, sizeof (*uua));
2091 * Return TRUE if userquota updates are needed.
2094 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx)
2096 if (!dmu_objset_userused_enabled(os))
2100 * If this is a raw receive just return and handle accounting
2101 * later when we have the keys loaded. We also don't do user
2102 * accounting during claiming since the datasets are not owned
2103 * for the duration of claiming and this txg should only be
2104 * used for recovery.
2106 if (os->os_encrypted && dmu_objset_is_receiving(os))
2109 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg)
2112 /* Allocate the user/group/project used objects if necessary. */
2113 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2114 VERIFY0(zap_create_claim(os,
2115 DMU_USERUSED_OBJECT,
2116 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2117 VERIFY0(zap_create_claim(os,
2118 DMU_GROUPUSED_OBJECT,
2119 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2122 if (dmu_objset_projectquota_enabled(os) &&
2123 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2124 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT,
2125 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2131 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and
2132 * also release the holds on the dnodes from dmu_objset_sync_dnodes().
2133 * The caller must taskq_wait(dp_sync_taskq).
2136 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx)
2138 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx);
2140 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes);
2141 for (int i = 0; i < num_sublists; i++) {
2142 userquota_updates_arg_t *uua =
2143 kmem_alloc(sizeof (*uua), KM_SLEEP);
2145 uua->uua_sublist_idx = i;
2149 * If we don't need to update userquotas, use
2150 * dnode_rele_task() to call dnode_rele()
2152 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
2153 need_userquota ? userquota_updates_task : dnode_rele_task,
2155 /* callback frees uua */
2161 * Returns a pointer to data to find uid/gid from
2163 * If a dirty record for transaction group that is syncing can't
2164 * be found then NULL is returned. In the NULL case it is assumed
2165 * the uid/gid aren't changing.
2168 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
2170 dbuf_dirty_record_t *dr;
2173 if (db->db_dirtycnt == 0)
2174 return (db->db.db_data); /* Nothing is changing */
2176 dr = dbuf_find_dirty_eq(db, tx->tx_txg);
2181 if (dr->dr_dnode->dn_bonuslen == 0 &&
2182 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
2183 data = dr->dt.dl.dr_data->b_data;
2185 data = dr->dt.dl.dr_data;
2192 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
2194 objset_t *os = dn->dn_objset;
2196 dmu_buf_impl_t *db = NULL;
2197 int flags = dn->dn_id_flags;
2199 boolean_t have_spill = B_FALSE;
2201 if (!dmu_objset_userused_enabled(dn->dn_objset))
2205 * Raw receives introduce a problem with user accounting. Raw
2206 * receives cannot update the user accounting info because the
2207 * user ids and the sizes are encrypted. To guarantee that we
2208 * never end up with bad user accounting, we simply disable it
2209 * during raw receives. We also disable this for normal receives
2210 * so that an incremental raw receive may be done on top of an
2211 * existing non-raw receive.
2213 if (os->os_encrypted && dmu_objset_is_receiving(os))
2216 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
2217 DN_ID_CHKED_SPILL)))
2220 if (before && dn->dn_bonuslen != 0)
2221 data = DN_BONUS(dn->dn_phys);
2222 else if (!before && dn->dn_bonuslen != 0) {
2225 mutex_enter(&db->db_mtx);
2226 data = dmu_objset_userquota_find_data(db, tx);
2228 data = DN_BONUS(dn->dn_phys);
2230 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
2233 if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
2234 rf |= DB_RF_HAVESTRUCT;
2235 error = dmu_spill_hold_by_dnode(dn,
2236 rf | DB_RF_MUST_SUCCEED,
2237 FTAG, (dmu_buf_t **)&db);
2239 mutex_enter(&db->db_mtx);
2240 data = (before) ? db->db.db_data :
2241 dmu_objset_userquota_find_data(db, tx);
2242 have_spill = B_TRUE;
2244 mutex_enter(&dn->dn_mtx);
2245 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2246 mutex_exit(&dn->dn_mtx);
2251 * Must always call the callback in case the object
2252 * type has changed and that type isn't an object type to track
2254 zfs_file_info_t zfi;
2255 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi);
2259 dn->dn_olduid = zfi.zfi_user;
2260 dn->dn_oldgid = zfi.zfi_group;
2261 dn->dn_oldprojid = zfi.zfi_project;
2263 dn->dn_newuid = zfi.zfi_user;
2264 dn->dn_newgid = zfi.zfi_group;
2265 dn->dn_newprojid = zfi.zfi_project;
2269 * Preserve existing uid/gid when the callback can't determine
2270 * what the new uid/gid are and the callback returned EEXIST.
2271 * The EEXIST error tells us to just use the existing uid/gid.
2272 * If we don't know what the old values are then just assign
2273 * them to 0, since that is a new file being created.
2275 if (!before && data == NULL && error == EEXIST) {
2276 if (flags & DN_ID_OLD_EXIST) {
2277 dn->dn_newuid = dn->dn_olduid;
2278 dn->dn_newgid = dn->dn_oldgid;
2279 dn->dn_newprojid = dn->dn_oldprojid;
2283 dn->dn_newprojid = ZFS_DEFAULT_PROJID;
2289 mutex_exit(&db->db_mtx);
2291 mutex_enter(&dn->dn_mtx);
2292 if (error == 0 && before)
2293 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2294 if (error == 0 && !before)
2295 dn->dn_id_flags |= DN_ID_NEW_EXIST;
2298 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2300 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2302 mutex_exit(&dn->dn_mtx);
2304 dmu_buf_rele((dmu_buf_t *)db, FTAG);
2308 dmu_objset_userspace_present(objset_t *os)
2310 return (os->os_phys->os_flags &
2311 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
2315 dmu_objset_userobjspace_present(objset_t *os)
2317 return (os->os_phys->os_flags &
2318 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE);
2322 dmu_objset_projectquota_present(objset_t *os)
2324 return (os->os_phys->os_flags &
2325 OBJSET_FLAG_PROJECTQUOTA_COMPLETE);
2329 dmu_objset_space_upgrade(objset_t *os)
2335 * We simply need to mark every object dirty, so that it will be
2336 * synced out and now accounted. If this is called
2337 * concurrently, or if we already did some work before crashing,
2338 * that's fine, since we track each object's accounted state
2342 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
2347 mutex_enter(&os->os_upgrade_lock);
2348 if (os->os_upgrade_exit)
2349 err = SET_ERROR(EINTR);
2350 mutex_exit(&os->os_upgrade_lock);
2354 if (issig(JUSTLOOKING) && issig(FORREAL))
2355 return (SET_ERROR(EINTR));
2357 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
2360 tx = dmu_tx_create(os);
2361 dmu_tx_hold_bonus(tx, obj);
2362 objerr = dmu_tx_assign(tx, TXG_WAIT);
2364 dmu_buf_rele(db, FTAG);
2368 dmu_buf_will_dirty(db, tx);
2369 dmu_buf_rele(db, FTAG);
2376 dmu_objset_userspace_upgrade_cb(objset_t *os)
2380 if (dmu_objset_userspace_present(os))
2382 if (dmu_objset_is_snapshot(os))
2383 return (SET_ERROR(EINVAL));
2384 if (!dmu_objset_userused_enabled(os))
2385 return (SET_ERROR(ENOTSUP));
2387 err = dmu_objset_space_upgrade(os);
2391 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2392 txg_wait_synced(dmu_objset_pool(os), 0);
2397 dmu_objset_userspace_upgrade(objset_t *os)
2399 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb);
2403 dmu_objset_id_quota_upgrade_cb(objset_t *os)
2407 if (dmu_objset_userobjspace_present(os) &&
2408 dmu_objset_projectquota_present(os))
2410 if (dmu_objset_is_snapshot(os))
2411 return (SET_ERROR(EINVAL));
2412 if (!dmu_objset_userused_enabled(os))
2413 return (SET_ERROR(ENOTSUP));
2414 if (!dmu_objset_projectquota_enabled(os) &&
2415 dmu_objset_userobjspace_present(os))
2416 return (SET_ERROR(ENOTSUP));
2418 if (dmu_objset_userobjused_enabled(os))
2419 dmu_objset_ds(os)->ds_feature_activation[
2420 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
2421 if (dmu_objset_projectquota_enabled(os))
2422 dmu_objset_ds(os)->ds_feature_activation[
2423 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
2425 err = dmu_objset_space_upgrade(os);
2429 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2430 if (dmu_objset_userobjused_enabled(os))
2431 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
2432 if (dmu_objset_projectquota_enabled(os))
2433 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
2435 txg_wait_synced(dmu_objset_pool(os), 0);
2440 dmu_objset_id_quota_upgrade(objset_t *os)
2442 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb);
2446 dmu_objset_userobjspace_upgradable(objset_t *os)
2448 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2449 !dmu_objset_is_snapshot(os) &&
2450 dmu_objset_userobjused_enabled(os) &&
2451 !dmu_objset_userobjspace_present(os) &&
2452 spa_writeable(dmu_objset_spa(os)));
2456 dmu_objset_projectquota_upgradable(objset_t *os)
2458 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2459 !dmu_objset_is_snapshot(os) &&
2460 dmu_objset_projectquota_enabled(os) &&
2461 !dmu_objset_projectquota_present(os) &&
2462 spa_writeable(dmu_objset_spa(os)));
2466 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
2467 uint64_t *usedobjsp, uint64_t *availobjsp)
2469 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
2470 usedobjsp, availobjsp);
2474 dmu_objset_fsid_guid(objset_t *os)
2476 return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
2480 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
2482 stat->dds_type = os->os_phys->os_type;
2483 if (os->os_dsl_dataset)
2484 dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
2488 dmu_objset_stats(objset_t *os, nvlist_t *nv)
2490 ASSERT(os->os_dsl_dataset ||
2491 os->os_phys->os_type == DMU_OST_META);
2493 if (os->os_dsl_dataset != NULL)
2494 dsl_dataset_stats(os->os_dsl_dataset, nv);
2496 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
2497 os->os_phys->os_type);
2498 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
2499 dmu_objset_userspace_present(os));
2503 dmu_objset_is_snapshot(objset_t *os)
2505 if (os->os_dsl_dataset != NULL)
2506 return (os->os_dsl_dataset->ds_is_snapshot);
2512 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen,
2513 boolean_t *conflict)
2515 dsl_dataset_t *ds = os->os_dsl_dataset;
2518 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2519 return (SET_ERROR(ENOENT));
2521 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
2522 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored,
2523 MT_NORMALIZE, real, maxlen, conflict));
2527 dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
2528 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
2530 dsl_dataset_t *ds = os->os_dsl_dataset;
2531 zap_cursor_t cursor;
2532 zap_attribute_t attr;
2534 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
2536 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2537 return (SET_ERROR(ENOENT));
2539 zap_cursor_init_serialized(&cursor,
2540 ds->ds_dir->dd_pool->dp_meta_objset,
2541 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp);
2543 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2544 zap_cursor_fini(&cursor);
2545 return (SET_ERROR(ENOENT));
2548 if (strlen(attr.za_name) + 1 > namelen) {
2549 zap_cursor_fini(&cursor);
2550 return (SET_ERROR(ENAMETOOLONG));
2553 (void) strlcpy(name, attr.za_name, namelen);
2555 *idp = attr.za_first_integer;
2557 *case_conflict = attr.za_normalization_conflict;
2558 zap_cursor_advance(&cursor);
2559 *offp = zap_cursor_serialize(&cursor);
2560 zap_cursor_fini(&cursor);
2566 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value)
2568 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value));
2572 dmu_dir_list_next(objset_t *os, int namelen, char *name,
2573 uint64_t *idp, uint64_t *offp)
2575 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
2576 zap_cursor_t cursor;
2577 zap_attribute_t attr;
2579 /* there is no next dir on a snapshot! */
2580 if (os->os_dsl_dataset->ds_object !=
2581 dsl_dir_phys(dd)->dd_head_dataset_obj)
2582 return (SET_ERROR(ENOENT));
2584 zap_cursor_init_serialized(&cursor,
2585 dd->dd_pool->dp_meta_objset,
2586 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp);
2588 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2589 zap_cursor_fini(&cursor);
2590 return (SET_ERROR(ENOENT));
2593 if (strlen(attr.za_name) + 1 > namelen) {
2594 zap_cursor_fini(&cursor);
2595 return (SET_ERROR(ENAMETOOLONG));
2598 (void) strlcpy(name, attr.za_name, namelen);
2600 *idp = attr.za_first_integer;
2601 zap_cursor_advance(&cursor);
2602 *offp = zap_cursor_serialize(&cursor);
2603 zap_cursor_fini(&cursor);
2608 typedef struct dmu_objset_find_ctx {
2612 char *dc_ddname; /* last component of ddobj's name */
2613 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *);
2616 kmutex_t *dc_error_lock;
2618 } dmu_objset_find_ctx_t;
2621 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp)
2623 dsl_pool_t *dp = dcp->dc_dp;
2627 zap_attribute_t *attr;
2631 /* don't process if there already was an error */
2632 if (*dcp->dc_error != 0)
2636 * Note: passing the name (dc_ddname) here is optional, but it
2637 * improves performance because we don't need to call
2638 * zap_value_search() to determine the name.
2640 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd);
2644 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2645 if (dd->dd_myname[0] == '$') {
2646 dsl_dir_rele(dd, FTAG);
2650 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2651 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2654 * Iterate over all children.
2656 if (dcp->dc_flags & DS_FIND_CHILDREN) {
2657 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2658 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2659 zap_cursor_retrieve(&zc, attr) == 0;
2660 (void) zap_cursor_advance(&zc)) {
2661 ASSERT3U(attr->za_integer_length, ==,
2663 ASSERT3U(attr->za_num_integers, ==, 1);
2665 dmu_objset_find_ctx_t *child_dcp =
2666 kmem_alloc(sizeof (*child_dcp), KM_SLEEP);
2668 child_dcp->dc_ddobj = attr->za_first_integer;
2669 child_dcp->dc_ddname = spa_strdup(attr->za_name);
2670 if (dcp->dc_tq != NULL)
2671 (void) taskq_dispatch(dcp->dc_tq,
2672 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP);
2674 dmu_objset_find_dp_impl(child_dcp);
2676 zap_cursor_fini(&zc);
2680 * Iterate over all snapshots.
2682 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) {
2684 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2689 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2690 dsl_dataset_rele(ds, FTAG);
2692 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2693 zap_cursor_retrieve(&zc, attr) == 0;
2694 (void) zap_cursor_advance(&zc)) {
2695 ASSERT3U(attr->za_integer_length, ==,
2697 ASSERT3U(attr->za_num_integers, ==, 1);
2699 err = dsl_dataset_hold_obj(dp,
2700 attr->za_first_integer, FTAG, &ds);
2703 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2704 dsl_dataset_rele(ds, FTAG);
2708 zap_cursor_fini(&zc);
2712 kmem_free(attr, sizeof (zap_attribute_t));
2715 dsl_dir_rele(dd, FTAG);
2722 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2725 * Note: we hold the dir while calling dsl_dataset_hold_obj() so
2726 * that the dir will remain cached, and we won't have to re-instantiate
2727 * it (which could be expensive due to finding its name via
2728 * zap_value_search()).
2730 dsl_dir_rele(dd, FTAG);
2733 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2734 dsl_dataset_rele(ds, FTAG);
2738 mutex_enter(dcp->dc_error_lock);
2739 /* only keep first error */
2740 if (*dcp->dc_error == 0)
2741 *dcp->dc_error = err;
2742 mutex_exit(dcp->dc_error_lock);
2745 if (dcp->dc_ddname != NULL)
2746 spa_strfree(dcp->dc_ddname);
2747 kmem_free(dcp, sizeof (*dcp));
2751 dmu_objset_find_dp_cb(void *arg)
2753 dmu_objset_find_ctx_t *dcp = arg;
2754 dsl_pool_t *dp = dcp->dc_dp;
2757 * We need to get a pool_config_lock here, as there are several
2758 * assert(pool_config_held) down the stack. Getting a lock via
2759 * dsl_pool_config_enter is risky, as it might be stalled by a
2760 * pending writer. This would deadlock, as the write lock can
2761 * only be granted when our parent thread gives up the lock.
2762 * The _prio interface gives us priority over a pending writer.
2764 dsl_pool_config_enter_prio(dp, FTAG);
2766 dmu_objset_find_dp_impl(dcp);
2768 dsl_pool_config_exit(dp, FTAG);
2772 * Find objsets under and including ddobj, call func(ds) on each.
2773 * The order for the enumeration is completely undefined.
2774 * func is called with dsl_pool_config held.
2777 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
2778 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
2783 dmu_objset_find_ctx_t *dcp;
2786 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL);
2787 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP);
2790 dcp->dc_ddobj = ddobj;
2791 dcp->dc_ddname = NULL;
2792 dcp->dc_func = func;
2794 dcp->dc_flags = flags;
2795 dcp->dc_error_lock = &err_lock;
2796 dcp->dc_error = &error;
2798 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) {
2800 * In case a write lock is held we can't make use of
2801 * parallelism, as down the stack of the worker threads
2802 * the lock is asserted via dsl_pool_config_held.
2803 * In case of a read lock this is solved by getting a read
2804 * lock in each worker thread, which isn't possible in case
2805 * of a writer lock. So we fall back to the synchronous path
2807 * In the future it might be possible to get some magic into
2808 * dsl_pool_config_held in a way that it returns true for
2809 * the worker threads so that a single lock held from this
2810 * thread suffices. For now, stay single threaded.
2812 dmu_objset_find_dp_impl(dcp);
2813 mutex_destroy(&err_lock);
2818 ntasks = dmu_find_threads;
2820 ntasks = vdev_count_leaves(dp->dp_spa) * 4;
2821 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks,
2824 kmem_free(dcp, sizeof (*dcp));
2825 mutex_destroy(&err_lock);
2827 return (SET_ERROR(ENOMEM));
2831 /* dcp will be freed by task */
2832 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP);
2835 * PORTING: this code relies on the property of taskq_wait to wait
2836 * until no more tasks are queued and no more tasks are active. As
2837 * we always queue new tasks from within other tasks, task_wait
2838 * reliably waits for the full recursion to finish, even though we
2839 * enqueue new tasks after taskq_wait has been called.
2840 * On platforms other than illumos, taskq_wait may not have this
2845 mutex_destroy(&err_lock);
2851 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
2852 * The dp_config_rwlock must not be held when this is called, and it
2853 * will not be held when the callback is called.
2854 * Therefore this function should only be used when the pool is not changing
2855 * (e.g. in syncing context), or the callback can deal with the possible races.
2858 dmu_objset_find_impl(spa_t *spa, const char *name,
2859 int func(const char *, void *), void *arg, int flags)
2862 dsl_pool_t *dp = spa_get_dsl(spa);
2865 zap_attribute_t *attr;
2870 dsl_pool_config_enter(dp, FTAG);
2872 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
2874 dsl_pool_config_exit(dp, FTAG);
2878 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2879 if (dd->dd_myname[0] == '$') {
2880 dsl_dir_rele(dd, FTAG);
2881 dsl_pool_config_exit(dp, FTAG);
2885 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2886 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2889 * Iterate over all children.
2891 if (flags & DS_FIND_CHILDREN) {
2892 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2893 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2894 zap_cursor_retrieve(&zc, attr) == 0;
2895 (void) zap_cursor_advance(&zc)) {
2896 ASSERT3U(attr->za_integer_length, ==,
2898 ASSERT3U(attr->za_num_integers, ==, 1);
2900 child = kmem_asprintf("%s/%s", name, attr->za_name);
2901 dsl_pool_config_exit(dp, FTAG);
2902 err = dmu_objset_find_impl(spa, child,
2904 dsl_pool_config_enter(dp, FTAG);
2905 kmem_strfree(child);
2909 zap_cursor_fini(&zc);
2912 dsl_dir_rele(dd, FTAG);
2913 dsl_pool_config_exit(dp, FTAG);
2914 kmem_free(attr, sizeof (zap_attribute_t));
2920 * Iterate over all snapshots.
2922 if (flags & DS_FIND_SNAPSHOTS) {
2923 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2928 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2929 dsl_dataset_rele(ds, FTAG);
2931 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2932 zap_cursor_retrieve(&zc, attr) == 0;
2933 (void) zap_cursor_advance(&zc)) {
2934 ASSERT3U(attr->za_integer_length, ==,
2936 ASSERT3U(attr->za_num_integers, ==, 1);
2938 child = kmem_asprintf("%s@%s",
2939 name, attr->za_name);
2940 dsl_pool_config_exit(dp, FTAG);
2941 err = func(child, arg);
2942 dsl_pool_config_enter(dp, FTAG);
2943 kmem_strfree(child);
2947 zap_cursor_fini(&zc);
2951 dsl_dir_rele(dd, FTAG);
2952 kmem_free(attr, sizeof (zap_attribute_t));
2953 dsl_pool_config_exit(dp, FTAG);
2958 /* Apply to self. */
2959 return (func(name, arg));
2963 * See comment above dmu_objset_find_impl().
2966 dmu_objset_find(const char *name, int func(const char *, void *), void *arg,
2972 error = spa_open(name, &spa, FTAG);
2975 error = dmu_objset_find_impl(spa, name, func, arg, flags);
2976 spa_close(spa, FTAG);
2981 dmu_objset_incompatible_encryption_version(objset_t *os)
2983 return (dsl_dir_incompatible_encryption_version(
2984 os->os_dsl_dataset->ds_dir));
2988 dmu_objset_set_user(objset_t *os, void *user_ptr)
2990 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2991 os->os_user_ptr = user_ptr;
2995 dmu_objset_get_user(objset_t *os)
2997 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2998 return (os->os_user_ptr);
3002 * Determine name of filesystem, given name of snapshot.
3003 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes
3006 dmu_fsname(const char *snapname, char *buf)
3008 char *atp = strchr(snapname, '@');
3010 return (SET_ERROR(EINVAL));
3011 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN)
3012 return (SET_ERROR(ENAMETOOLONG));
3013 (void) strlcpy(buf, snapname, atp - snapname + 1);
3018 * Call when we think we're going to write/free space in open context
3019 * to track the amount of dirty data in the open txg, which is also the
3020 * amount of memory that can not be evicted until this txg syncs.
3022 * Note that there are two conditions where this can be called from
3025 * [1] When we just created the dataset, in which case we go on with
3026 * updating any accounting of dirty data as usual.
3027 * [2] When we are dirtying MOS data, in which case we only update the
3028 * pool's accounting of dirty data.
3031 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx)
3033 dsl_dataset_t *ds = os->os_dsl_dataset;
3034 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space);
3037 dsl_dir_willuse_space(ds->ds_dir, aspace, tx);
3040 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx);
3043 #if defined(_KERNEL)
3044 EXPORT_SYMBOL(dmu_objset_zil);
3045 EXPORT_SYMBOL(dmu_objset_pool);
3046 EXPORT_SYMBOL(dmu_objset_ds);
3047 EXPORT_SYMBOL(dmu_objset_type);
3048 EXPORT_SYMBOL(dmu_objset_name);
3049 EXPORT_SYMBOL(dmu_objset_hold);
3050 EXPORT_SYMBOL(dmu_objset_hold_flags);
3051 EXPORT_SYMBOL(dmu_objset_own);
3052 EXPORT_SYMBOL(dmu_objset_rele);
3053 EXPORT_SYMBOL(dmu_objset_rele_flags);
3054 EXPORT_SYMBOL(dmu_objset_disown);
3055 EXPORT_SYMBOL(dmu_objset_from_ds);
3056 EXPORT_SYMBOL(dmu_objset_create);
3057 EXPORT_SYMBOL(dmu_objset_clone);
3058 EXPORT_SYMBOL(dmu_objset_stats);
3059 EXPORT_SYMBOL(dmu_objset_fast_stat);
3060 EXPORT_SYMBOL(dmu_objset_spa);
3061 EXPORT_SYMBOL(dmu_objset_space);
3062 EXPORT_SYMBOL(dmu_objset_fsid_guid);
3063 EXPORT_SYMBOL(dmu_objset_find);
3064 EXPORT_SYMBOL(dmu_objset_byteswap);
3065 EXPORT_SYMBOL(dmu_objset_evict_dbufs);
3066 EXPORT_SYMBOL(dmu_objset_snap_cmtime);
3067 EXPORT_SYMBOL(dmu_objset_dnodesize);
3069 EXPORT_SYMBOL(dmu_objset_sync);
3070 EXPORT_SYMBOL(dmu_objset_is_dirty);
3071 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats);
3072 EXPORT_SYMBOL(dmu_objset_create_impl);
3073 EXPORT_SYMBOL(dmu_objset_open_impl);
3074 EXPORT_SYMBOL(dmu_objset_evict);
3075 EXPORT_SYMBOL(dmu_objset_register_type);
3076 EXPORT_SYMBOL(dmu_objset_sync_done);
3077 EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
3078 EXPORT_SYMBOL(dmu_objset_userused_enabled);
3079 EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
3080 EXPORT_SYMBOL(dmu_objset_userspace_present);
3081 EXPORT_SYMBOL(dmu_objset_userobjused_enabled);
3082 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable);
3083 EXPORT_SYMBOL(dmu_objset_userobjspace_present);
3084 EXPORT_SYMBOL(dmu_objset_projectquota_enabled);
3085 EXPORT_SYMBOL(dmu_objset_projectquota_present);
3086 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable);
3087 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade);