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
35 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP.
38 /* Portions Copyright 2010 Robert Milkowski */
41 #include <sys/zfs_context.h>
42 #include <sys/dmu_objset.h>
43 #include <sys/dsl_dir.h>
44 #include <sys/dsl_dataset.h>
45 #include <sys/dsl_prop.h>
46 #include <sys/dsl_pool.h>
47 #include <sys/dsl_synctask.h>
48 #include <sys/dsl_deleg.h>
49 #include <sys/dnode.h>
52 #include <sys/dmu_tx.h>
55 #include <sys/dmu_impl.h>
56 #include <sys/zfs_ioctl.h>
58 #include <sys/zfs_onexit.h>
59 #include <sys/dsl_destroy.h>
61 #include <sys/zfeature.h>
62 #include <sys/policy.h>
63 #include <sys/spa_impl.h>
64 #include <sys/dmu_recv.h>
65 #include <sys/zfs_project.h>
66 #include "zfs_namecheck.h"
67 #include <sys/vdev_impl.h>
71 * Needed to close a window in dnode_move() that allows the objset to be freed
72 * before it can be safely accessed.
77 * Tunable to overwrite the maximum number of threads for the parallelization
78 * of dmu_objset_find_dp, needed to speed up the import of pools with many
80 * Default is 4 times the number of leaf vdevs.
82 static const int dmu_find_threads = 0;
85 * Backfill lower metadnode objects after this many have been freed.
86 * Backfilling negatively impacts object creation rates, so only do it
87 * if there are enough holes to fill.
89 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT;
91 static const char *upgrade_tag = "upgrade_tag";
93 static void dmu_objset_find_dp_cb(void *arg);
95 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb);
96 static void dmu_objset_upgrade_stop(objset_t *os);
101 rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
105 dmu_objset_fini(void)
107 rw_destroy(&os_lock);
111 dmu_objset_spa(objset_t *os)
117 dmu_objset_zil(objset_t *os)
123 dmu_objset_pool(objset_t *os)
127 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
128 return (ds->ds_dir->dd_pool);
130 return (spa_get_dsl(os->os_spa));
134 dmu_objset_ds(objset_t *os)
136 return (os->os_dsl_dataset);
140 dmu_objset_type(objset_t *os)
142 return (os->os_phys->os_type);
146 dmu_objset_name(objset_t *os, char *buf)
148 dsl_dataset_name(os->os_dsl_dataset, buf);
152 dmu_objset_id(objset_t *os)
154 dsl_dataset_t *ds = os->os_dsl_dataset;
156 return (ds ? ds->ds_object : 0);
160 dmu_objset_dnodesize(objset_t *os)
162 return (os->os_dnodesize);
166 dmu_objset_syncprop(objset_t *os)
168 return (os->os_sync);
172 dmu_objset_logbias(objset_t *os)
174 return (os->os_logbias);
178 checksum_changed_cb(void *arg, uint64_t newval)
183 * Inheritance should have been done by now.
185 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
187 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
191 compression_changed_cb(void *arg, uint64_t newval)
196 * Inheritance and range checking should have been done by now.
198 ASSERT(newval != ZIO_COMPRESS_INHERIT);
200 os->os_compress = zio_compress_select(os->os_spa,
201 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON);
202 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress,
203 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT);
207 copies_changed_cb(void *arg, uint64_t newval)
212 * Inheritance and range checking should have been done by now.
215 ASSERT(newval <= spa_max_replication(os->os_spa));
217 os->os_copies = newval;
221 dedup_changed_cb(void *arg, uint64_t newval)
224 spa_t *spa = os->os_spa;
225 enum zio_checksum checksum;
228 * Inheritance should have been done by now.
230 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
232 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
234 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
235 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
239 primary_cache_changed_cb(void *arg, uint64_t newval)
244 * Inheritance and range checking should have been done by now.
246 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
247 newval == ZFS_CACHE_METADATA);
249 os->os_primary_cache = newval;
253 secondary_cache_changed_cb(void *arg, uint64_t newval)
258 * Inheritance and range checking should have been done by now.
260 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
261 newval == ZFS_CACHE_METADATA);
263 os->os_secondary_cache = newval;
267 sync_changed_cb(void *arg, uint64_t newval)
272 * Inheritance and range checking should have been done by now.
274 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
275 newval == ZFS_SYNC_DISABLED);
277 os->os_sync = newval;
279 zil_set_sync(os->os_zil, newval);
283 redundant_metadata_changed_cb(void *arg, uint64_t newval)
288 * Inheritance and range checking should have been done by now.
290 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
291 newval == ZFS_REDUNDANT_METADATA_MOST ||
292 newval == ZFS_REDUNDANT_METADATA_SOME ||
293 newval == ZFS_REDUNDANT_METADATA_NONE);
295 os->os_redundant_metadata = newval;
299 dnodesize_changed_cb(void *arg, uint64_t newval)
304 case ZFS_DNSIZE_LEGACY:
305 os->os_dnodesize = DNODE_MIN_SIZE;
307 case ZFS_DNSIZE_AUTO:
309 * Choose a dnode size that will work well for most
310 * workloads if the user specified "auto". Future code
311 * improvements could dynamically select a dnode size
312 * based on observed workload patterns.
314 os->os_dnodesize = DNODE_MIN_SIZE * 2;
321 os->os_dnodesize = newval;
327 smallblk_changed_cb(void *arg, uint64_t newval)
332 * Inheritance and range checking should have been done by now.
334 ASSERT(newval <= SPA_MAXBLOCKSIZE);
335 ASSERT(ISP2(newval));
337 os->os_zpl_special_smallblock = newval;
341 logbias_changed_cb(void *arg, uint64_t newval)
345 ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
346 newval == ZFS_LOGBIAS_THROUGHPUT);
347 os->os_logbias = newval;
349 zil_set_logbias(os->os_zil, newval);
353 recordsize_changed_cb(void *arg, uint64_t newval)
357 os->os_recordsize = newval;
361 dmu_objset_byteswap(void *buf, size_t size)
363 objset_phys_t *osp = buf;
365 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 ||
366 size == sizeof (objset_phys_t));
367 dnode_byteswap(&osp->os_meta_dnode);
368 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
369 osp->os_type = BSWAP_64(osp->os_type);
370 osp->os_flags = BSWAP_64(osp->os_flags);
371 if (size >= OBJSET_PHYS_SIZE_V2) {
372 dnode_byteswap(&osp->os_userused_dnode);
373 dnode_byteswap(&osp->os_groupused_dnode);
374 if (size >= sizeof (objset_phys_t))
375 dnode_byteswap(&osp->os_projectused_dnode);
380 * The hash is a CRC-based hash of the objset_t pointer and the object number.
383 dnode_hash(const objset_t *os, uint64_t obj)
385 uintptr_t osv = (uintptr_t)os;
386 uint64_t crc = -1ULL;
388 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
390 * The low 6 bits of the pointer don't have much entropy, because
391 * the objset_t is larger than 2^6 bytes long.
393 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
394 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
395 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
396 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF];
398 crc ^= (osv>>14) ^ (obj>>24);
404 dnode_multilist_index_func(multilist_t *ml, void *obj)
409 * The low order bits of the hash value are thought to be
410 * distributed evenly. Otherwise, in the case that the multilist
411 * has a power of two number of sublists, each sublists' usage
412 * would not be evenly distributed. In this context full 64bit
413 * division would be a waste of time, so limit it to 32 bits.
415 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) %
416 multilist_get_num_sublists(ml));
419 static inline boolean_t
420 dmu_os_is_l2cacheable(objset_t *os)
423 zfs_cache_type_t cache = os->os_secondary_cache;
424 blkptr_t *bp = os->os_rootbp;
426 if (bp != NULL && !BP_IS_HOLE(bp)) {
427 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva);
428 vdev_t *rvd = os->os_spa->spa_root_vdev;
430 if (vdev < rvd->vdev_children)
431 vd = rvd->vdev_child[vdev];
433 if (cache == ZFS_CACHE_ALL || cache == ZFS_CACHE_METADATA) {
437 if ((vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL &&
438 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) ||
439 l2arc_exclude_special == 0)
448 * Instantiates the objset_t in-memory structure corresponding to the
449 * objset_phys_t that's pointed to by the specified blkptr_t.
452 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
458 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
459 ASSERT(!BP_IS_REDACTED(bp));
462 * We need the pool config lock to get properties.
464 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool));
467 * The $ORIGIN dataset (if it exists) doesn't have an associated
468 * objset, so there's no reason to open it. The $ORIGIN dataset
469 * will not exist on pools older than SPA_VERSION_ORIGIN.
471 if (ds != NULL && spa_get_dsl(spa) != NULL &&
472 spa_get_dsl(spa)->dp_origin_snap != NULL) {
473 ASSERT3P(ds->ds_dir, !=,
474 spa_get_dsl(spa)->dp_origin_snap->ds_dir);
477 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
478 os->os_dsl_dataset = ds;
481 if (!BP_IS_HOLE(os->os_rootbp)) {
482 arc_flags_t aflags = ARC_FLAG_WAIT;
485 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL;
486 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
487 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
489 if (dmu_os_is_l2cacheable(os))
490 aflags |= ARC_FLAG_L2CACHE;
492 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) {
493 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
494 ASSERT(BP_IS_AUTHENTICATED(bp));
495 zio_flags |= ZIO_FLAG_RAW;
498 dprintf_bp(os->os_rootbp, "reading %s", "");
499 err = arc_read(NULL, spa, os->os_rootbp,
500 arc_getbuf_func, &os->os_phys_buf,
501 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
503 kmem_free(os, sizeof (objset_t));
504 /* convert checksum errors into IO errors */
506 err = SET_ERROR(EIO);
510 if (spa_version(spa) < SPA_VERSION_USERSPACE)
511 size = OBJSET_PHYS_SIZE_V1;
512 else if (!spa_feature_is_enabled(spa,
513 SPA_FEATURE_PROJECT_QUOTA))
514 size = OBJSET_PHYS_SIZE_V2;
516 size = sizeof (objset_phys_t);
518 /* Increase the blocksize if we are permitted. */
519 if (arc_buf_size(os->os_phys_buf) < size) {
520 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf,
521 ARC_BUFC_METADATA, size);
522 memset(buf->b_data, 0, size);
523 memcpy(buf->b_data, os->os_phys_buf->b_data,
524 arc_buf_size(os->os_phys_buf));
525 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
526 os->os_phys_buf = buf;
529 os->os_phys = os->os_phys_buf->b_data;
530 os->os_flags = os->os_phys->os_flags;
532 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
533 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1;
534 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf,
535 ARC_BUFC_METADATA, size);
536 os->os_phys = os->os_phys_buf->b_data;
537 memset(os->os_phys, 0, size);
540 * These properties will be filled in by the logic in zfs_get_zplprop()
541 * when they are queried for the first time.
543 os->os_version = OBJSET_PROP_UNINITIALIZED;
544 os->os_normalization = OBJSET_PROP_UNINITIALIZED;
545 os->os_utf8only = OBJSET_PROP_UNINITIALIZED;
546 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED;
549 * Note: the changed_cb will be called once before the register
550 * func returns, thus changing the checksum/compression from the
551 * default (fletcher2/off). Snapshots don't need to know about
552 * checksum/compression/copies.
555 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0);
557 err = dsl_prop_register(ds,
558 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
559 primary_cache_changed_cb, os);
561 err = dsl_prop_register(ds,
562 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
563 secondary_cache_changed_cb, os);
565 if (!ds->ds_is_snapshot) {
567 err = dsl_prop_register(ds,
568 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
569 checksum_changed_cb, os);
572 err = dsl_prop_register(ds,
573 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
574 compression_changed_cb, os);
577 err = dsl_prop_register(ds,
578 zfs_prop_to_name(ZFS_PROP_COPIES),
579 copies_changed_cb, os);
582 err = dsl_prop_register(ds,
583 zfs_prop_to_name(ZFS_PROP_DEDUP),
584 dedup_changed_cb, os);
587 err = dsl_prop_register(ds,
588 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
589 logbias_changed_cb, os);
592 err = dsl_prop_register(ds,
593 zfs_prop_to_name(ZFS_PROP_SYNC),
594 sync_changed_cb, os);
597 err = dsl_prop_register(ds,
599 ZFS_PROP_REDUNDANT_METADATA),
600 redundant_metadata_changed_cb, os);
603 err = dsl_prop_register(ds,
604 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
605 recordsize_changed_cb, os);
608 err = dsl_prop_register(ds,
609 zfs_prop_to_name(ZFS_PROP_DNODESIZE),
610 dnodesize_changed_cb, os);
613 err = dsl_prop_register(ds,
615 ZFS_PROP_SPECIAL_SMALL_BLOCKS),
616 smallblk_changed_cb, os);
620 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
621 kmem_free(os, sizeof (objset_t));
625 /* It's the meta-objset. */
626 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
627 os->os_compress = ZIO_COMPRESS_ON;
628 os->os_complevel = ZIO_COMPLEVEL_DEFAULT;
629 os->os_encrypted = B_FALSE;
630 os->os_copies = spa_max_replication(spa);
631 os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
632 os->os_dedup_verify = B_FALSE;
633 os->os_logbias = ZFS_LOGBIAS_LATENCY;
634 os->os_sync = ZFS_SYNC_STANDARD;
635 os->os_primary_cache = ZFS_CACHE_ALL;
636 os->os_secondary_cache = ZFS_CACHE_ALL;
637 os->os_dnodesize = DNODE_MIN_SIZE;
640 if (ds == NULL || !ds->ds_is_snapshot)
641 os->os_zil_header = os->os_phys->os_zil_header;
642 os->os_zil = zil_alloc(os, &os->os_zil_header);
644 for (i = 0; i < TXG_SIZE; i++) {
645 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
646 offsetof(dnode_t, dn_dirty_link[i]),
647 dnode_multilist_index_func);
649 list_create(&os->os_dnodes, sizeof (dnode_t),
650 offsetof(dnode_t, dn_link));
651 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
652 offsetof(dmu_buf_impl_t, db_link));
654 list_link_init(&os->os_evicting_node);
656 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
657 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL);
658 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
659 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
660 os->os_obj_next_percpu_len = boot_ncpus;
661 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len *
662 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP);
664 dnode_special_open(os, &os->os_phys->os_meta_dnode,
665 DMU_META_DNODE_OBJECT, &os->os_meta_dnode);
666 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) {
667 dnode_special_open(os, &os->os_phys->os_userused_dnode,
668 DMU_USERUSED_OBJECT, &os->os_userused_dnode);
669 dnode_special_open(os, &os->os_phys->os_groupused_dnode,
670 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode);
671 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf))
672 dnode_special_open(os,
673 &os->os_phys->os_projectused_dnode,
674 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode);
677 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL);
684 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
689 * We need the pool_config lock to manipulate the dsl_dataset_t.
690 * Even if the dataset is long-held, we need the pool_config lock
691 * to open the objset, as it needs to get properties.
693 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
695 mutex_enter(&ds->ds_opening_lock);
696 if (ds->ds_objset == NULL) {
698 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
699 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
700 ds, dsl_dataset_get_blkptr(ds), &os);
701 rrw_exit(&ds->ds_bp_rwlock, FTAG);
704 mutex_enter(&ds->ds_lock);
705 ASSERT(ds->ds_objset == NULL);
707 mutex_exit(&ds->ds_lock);
710 *osp = ds->ds_objset;
711 mutex_exit(&ds->ds_opening_lock);
716 * Holds the pool while the objset is held. Therefore only one objset
717 * can be held at a time.
720 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag,
726 ds_hold_flags_t flags;
728 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
729 err = dsl_pool_hold(name, tag, &dp);
732 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds);
734 dsl_pool_rele(dp, tag);
738 err = dmu_objset_from_ds(ds, osp);
740 dsl_dataset_rele(ds, tag);
741 dsl_pool_rele(dp, tag);
748 dmu_objset_hold(const char *name, const void *tag, objset_t **osp)
750 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp));
754 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type,
755 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
759 int err = dmu_objset_from_ds(ds, osp);
762 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
763 return (SET_ERROR(EINVAL));
764 } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
765 return (SET_ERROR(EROFS));
766 } else if (!readonly && decrypt &&
767 dsl_dir_incompatible_encryption_version(ds->ds_dir)) {
768 return (SET_ERROR(EROFS));
771 /* if we are decrypting, we can now check MACs in os->os_phys_buf */
772 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) {
775 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT,
776 ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
777 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa,
782 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf));
789 * dsl_pool must not be held when this is called.
790 * Upon successful return, there will be a longhold on the dataset,
791 * and the dsl_pool will not be held.
794 dmu_objset_own(const char *name, dmu_objset_type_t type,
795 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
800 ds_hold_flags_t flags;
802 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
803 err = dsl_pool_hold(name, FTAG, &dp);
806 err = dsl_dataset_own(dp, name, flags, tag, &ds);
808 dsl_pool_rele(dp, FTAG);
811 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
813 dsl_dataset_disown(ds, flags, tag);
814 dsl_pool_rele(dp, FTAG);
819 * User accounting requires the dataset to be decrypted and rw.
820 * We also don't begin user accounting during claiming to help
821 * speed up pool import times and to keep this txg reserved
822 * completely for recovery work.
824 if (!readonly && !dp->dp_spa->spa_claiming &&
825 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) {
826 if (dmu_objset_userobjspace_upgradable(*osp) ||
827 dmu_objset_projectquota_upgradable(*osp)) {
828 dmu_objset_id_quota_upgrade(*osp);
829 } else if (dmu_objset_userused_enabled(*osp)) {
830 dmu_objset_userspace_upgrade(*osp);
834 dsl_pool_rele(dp, FTAG);
839 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
840 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
844 ds_hold_flags_t flags;
846 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
847 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds);
851 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
853 dsl_dataset_disown(ds, flags, tag);
861 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag)
863 ds_hold_flags_t flags;
864 dsl_pool_t *dp = dmu_objset_pool(os);
866 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
867 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag);
868 dsl_pool_rele(dp, tag);
872 dmu_objset_rele(objset_t *os, const void *tag)
874 dmu_objset_rele_flags(os, B_FALSE, tag);
878 * When we are called, os MUST refer to an objset associated with a dataset
879 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
880 * == tag. We will then release and reacquire ownership of the dataset while
881 * holding the pool config_rwlock to avoid intervening namespace or ownership
884 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
885 * release the hold on its dataset and acquire a new one on the dataset of the
886 * same name so that it can be partially torn down and reconstructed.
889 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
890 boolean_t decrypt, const void *tag)
893 char name[ZFS_MAX_DATASET_NAME_LEN];
894 ds_hold_flags_t flags;
896 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
897 VERIFY3P(ds, !=, NULL);
898 VERIFY3P(ds->ds_owner, ==, tag);
899 VERIFY(dsl_dataset_long_held(ds));
901 dsl_dataset_name(ds, name);
902 dp = ds->ds_dir->dd_pool;
903 dsl_pool_config_enter(dp, FTAG);
904 dsl_dataset_disown(ds, flags, tag);
905 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds));
906 dsl_pool_config_exit(dp, FTAG);
910 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag)
912 ds_hold_flags_t flags;
914 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
916 * Stop upgrading thread
918 dmu_objset_upgrade_stop(os);
919 dsl_dataset_disown(os->os_dsl_dataset, flags, tag);
923 dmu_objset_evict_dbufs(objset_t *os)
928 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP);
930 mutex_enter(&os->os_lock);
931 dn = list_head(&os->os_dnodes);
934 * Skip dnodes without holds. We have to do this dance
935 * because dnode_add_ref() only works if there is already a
936 * hold. If the dnode has no holds, then it has no dbufs.
938 if (dnode_add_ref(dn, FTAG)) {
939 list_insert_after(&os->os_dnodes, dn, dn_marker);
940 mutex_exit(&os->os_lock);
942 dnode_evict_dbufs(dn);
943 dnode_rele(dn, FTAG);
945 mutex_enter(&os->os_lock);
946 dn = list_next(&os->os_dnodes, dn_marker);
947 list_remove(&os->os_dnodes, dn_marker);
949 dn = list_next(&os->os_dnodes, dn);
952 mutex_exit(&os->os_lock);
954 kmem_free(dn_marker, sizeof (dnode_t));
956 if (DMU_USERUSED_DNODE(os) != NULL) {
957 if (DMU_PROJECTUSED_DNODE(os) != NULL)
958 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os));
959 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os));
960 dnode_evict_dbufs(DMU_USERUSED_DNODE(os));
962 dnode_evict_dbufs(DMU_META_DNODE(os));
966 * Objset eviction processing is split into into two pieces.
967 * The first marks the objset as evicting, evicts any dbufs that
968 * have a refcount of zero, and then queues up the objset for the
969 * second phase of eviction. Once os->os_dnodes has been cleared by
970 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed.
971 * The second phase closes the special dnodes, dequeues the objset from
972 * the list of those undergoing eviction, and finally frees the objset.
974 * NOTE: Due to asynchronous eviction processing (invocation of
975 * dnode_buf_pageout()), it is possible for the meta dnode for the
976 * objset to have no holds even though os->os_dnodes is not empty.
979 dmu_objset_evict(objset_t *os)
981 dsl_dataset_t *ds = os->os_dsl_dataset;
983 for (int t = 0; t < TXG_SIZE; t++)
984 ASSERT(!dmu_objset_is_dirty(os, t));
987 dsl_prop_unregister_all(ds, os);
992 dmu_objset_evict_dbufs(os);
994 mutex_enter(&os->os_lock);
995 spa_evicting_os_register(os->os_spa, os);
996 if (list_is_empty(&os->os_dnodes)) {
997 mutex_exit(&os->os_lock);
998 dmu_objset_evict_done(os);
1000 mutex_exit(&os->os_lock);
1007 dmu_objset_evict_done(objset_t *os)
1009 ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
1011 dnode_special_close(&os->os_meta_dnode);
1012 if (DMU_USERUSED_DNODE(os)) {
1013 if (DMU_PROJECTUSED_DNODE(os))
1014 dnode_special_close(&os->os_projectused_dnode);
1015 dnode_special_close(&os->os_userused_dnode);
1016 dnode_special_close(&os->os_groupused_dnode);
1018 zil_free(os->os_zil);
1020 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
1023 * This is a barrier to prevent the objset from going away in
1024 * dnode_move() until we can safely ensure that the objset is still in
1025 * use. We consider the objset valid before the barrier and invalid
1026 * after the barrier.
1028 rw_enter(&os_lock, RW_READER);
1031 kmem_free(os->os_obj_next_percpu,
1032 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0]));
1034 mutex_destroy(&os->os_lock);
1035 mutex_destroy(&os->os_userused_lock);
1036 mutex_destroy(&os->os_obj_lock);
1037 mutex_destroy(&os->os_user_ptr_lock);
1038 mutex_destroy(&os->os_upgrade_lock);
1039 for (int i = 0; i < TXG_SIZE; i++)
1040 multilist_destroy(&os->os_dirty_dnodes[i]);
1041 spa_evicting_os_deregister(os->os_spa, os);
1042 kmem_free(os, sizeof (objset_t));
1046 dmu_objset_snap_cmtime(objset_t *os)
1048 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
1052 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1053 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx)
1058 ASSERT(dmu_tx_is_syncing(tx));
1061 blksz = DNODE_BLOCK_SIZE;
1063 ibs = DN_MAX_INDBLKSHIFT;
1066 VERIFY0(dmu_objset_from_ds(ds, &os));
1068 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
1070 mdn = DMU_META_DNODE(os);
1072 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0,
1073 DNODE_MIN_SLOTS, tx);
1076 * We don't want to have to increase the meta-dnode's nlevels
1077 * later, because then we could do it in quiescing context while
1078 * we are also accessing it in open context.
1080 * This precaution is not necessary for the MOS (ds == NULL),
1081 * because the MOS is only updated in syncing context.
1082 * This is most fortunate: the MOS is the only objset that
1083 * needs to be synced multiple times as spa_sync() iterates
1084 * to convergence, so minimizing its dn_nlevels matters.
1091 * Determine the number of levels necessary for the
1092 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note
1093 * that in order to ensure that we do not overflow
1094 * 64 bits, there has to be a nlevels that gives us a
1095 * number of blocks > DN_MAX_OBJECT but < 2^64.
1096 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)
1097 * (10) must be less than (64 - log2(DN_MAX_OBJECT))
1100 while ((uint64_t)mdn->dn_nblkptr <<
1101 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) *
1102 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
1107 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
1108 mdn->dn_nlevels = levels;
1111 ASSERT(type != DMU_OST_NONE);
1112 ASSERT(type != DMU_OST_ANY);
1113 ASSERT(type < DMU_OST_NUMTYPES);
1114 os->os_phys->os_type = type;
1117 * Enable user accounting if it is enabled and this is not an
1118 * encrypted receive.
1120 if (dmu_objset_userused_enabled(os) &&
1121 (!os->os_encrypted || !dmu_objset_is_receiving(os))) {
1122 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1123 if (dmu_objset_userobjused_enabled(os)) {
1124 ds->ds_feature_activation[
1125 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
1126 os->os_phys->os_flags |=
1127 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
1129 if (dmu_objset_projectquota_enabled(os)) {
1130 ds->ds_feature_activation[
1131 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
1132 os->os_phys->os_flags |=
1133 OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
1135 os->os_flags = os->os_phys->os_flags;
1138 dsl_dataset_dirty(ds, tx);
1143 /* called from dsl for meta-objset */
1145 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1146 dmu_objset_type_t type, dmu_tx_t *tx)
1148 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx));
1151 typedef struct dmu_objset_create_arg {
1152 const char *doca_name;
1155 void (*doca_userfunc)(objset_t *os, void *arg,
1156 cred_t *cr, dmu_tx_t *tx);
1158 dmu_objset_type_t doca_type;
1159 uint64_t doca_flags;
1160 dsl_crypto_params_t *doca_dcp;
1161 } dmu_objset_create_arg_t;
1164 dmu_objset_create_check(void *arg, dmu_tx_t *tx)
1166 dmu_objset_create_arg_t *doca = arg;
1167 dsl_pool_t *dp = dmu_tx_pool(tx);
1169 dsl_dataset_t *parentds;
1174 if (strchr(doca->doca_name, '@') != NULL)
1175 return (SET_ERROR(EINVAL));
1177 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN)
1178 return (SET_ERROR(ENAMETOOLONG));
1180 if (dataset_nestcheck(doca->doca_name) != 0)
1181 return (SET_ERROR(ENAMETOOLONG));
1183 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
1187 dsl_dir_rele(pdd, FTAG);
1188 return (SET_ERROR(EEXIST));
1191 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL);
1193 dsl_dir_rele(pdd, FTAG);
1197 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1198 doca->doca_cred, doca->doca_proc);
1200 dsl_dir_rele(pdd, FTAG);
1204 /* can't create below anything but filesystems (eg. no ZVOLs) */
1205 error = dsl_dataset_hold_obj(pdd->dd_pool,
1206 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds);
1208 dsl_dir_rele(pdd, FTAG);
1211 error = dmu_objset_from_ds(parentds, &parentos);
1213 dsl_dataset_rele(parentds, FTAG);
1214 dsl_dir_rele(pdd, FTAG);
1217 if (dmu_objset_type(parentos) != DMU_OST_ZFS) {
1218 dsl_dataset_rele(parentds, FTAG);
1219 dsl_dir_rele(pdd, FTAG);
1220 return (SET_ERROR(ZFS_ERR_WRONG_PARENT));
1222 dsl_dataset_rele(parentds, FTAG);
1223 dsl_dir_rele(pdd, FTAG);
1229 dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
1231 dmu_objset_create_arg_t *doca = arg;
1232 dsl_pool_t *dp = dmu_tx_pool(tx);
1233 spa_t *spa = dp->dp_spa;
1242 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
1244 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
1245 doca->doca_cred, doca->doca_dcp, tx);
1247 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj,
1248 DS_HOLD_FLAG_DECRYPT, FTAG, &ds));
1249 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
1250 bp = dsl_dataset_get_blkptr(ds);
1251 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx);
1252 rrw_exit(&ds->ds_bp_rwlock, FTAG);
1254 if (doca->doca_userfunc != NULL) {
1255 doca->doca_userfunc(os, doca->doca_userarg,
1256 doca->doca_cred, tx);
1260 * The doca_userfunc() may write out some data that needs to be
1261 * encrypted if the dataset is encrypted (specifically the root
1262 * directory). This data must be written out before the encryption
1263 * key mapping is removed by dsl_dataset_rele_flags(). Force the
1264 * I/O to occur immediately by invoking the relevant sections of
1267 if (os->os_encrypted) {
1268 dsl_dataset_t *tmpds = NULL;
1269 boolean_t need_sync_done = B_FALSE;
1271 mutex_enter(&ds->ds_lock);
1272 ds->ds_owner = FTAG;
1273 mutex_exit(&ds->ds_lock);
1275 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1276 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1278 if (tmpds != NULL) {
1279 dsl_dataset_sync(ds, rzio, tx);
1280 need_sync_done = B_TRUE;
1282 VERIFY0(zio_wait(rzio));
1284 dmu_objset_sync_done(os, tx);
1285 taskq_wait(dp->dp_sync_taskq);
1286 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) {
1287 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1288 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1291 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1292 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1294 if (tmpds != NULL) {
1295 dmu_buf_rele(ds->ds_dbuf, ds);
1296 dsl_dataset_sync(ds, rzio, tx);
1298 VERIFY0(zio_wait(rzio));
1300 if (need_sync_done) {
1301 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1302 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1303 dsl_dataset_sync_done(ds, tx);
1306 mutex_enter(&ds->ds_lock);
1307 ds->ds_owner = NULL;
1308 mutex_exit(&ds->ds_lock);
1311 spa_history_log_internal_ds(ds, "create", tx, " ");
1313 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG);
1314 dsl_dir_rele(pdd, FTAG);
1318 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
1319 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg)
1321 dmu_objset_create_arg_t doca;
1322 dsl_crypto_params_t tmp_dcp = { 0 };
1324 doca.doca_name = name;
1325 doca.doca_cred = CRED();
1326 doca.doca_proc = curproc;
1327 doca.doca_flags = flags;
1328 doca.doca_userfunc = func;
1329 doca.doca_userarg = arg;
1330 doca.doca_type = type;
1333 * Some callers (mostly for testing) do not provide a dcp on their
1334 * own but various code inside the sync task will require it to be
1335 * allocated. Rather than adding NULL checks throughout this code
1336 * or adding dummy dcp's to all of the callers we simply create a
1337 * dummy one here and use that. This zero dcp will have the same
1338 * effect as asking for inheritance of all encryption params.
1340 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp;
1342 int rv = dsl_sync_task(name,
1343 dmu_objset_create_check, dmu_objset_create_sync, &doca,
1344 6, ZFS_SPACE_CHECK_NORMAL);
1347 zvol_create_minor(name);
1351 typedef struct dmu_objset_clone_arg {
1352 const char *doca_clone;
1353 const char *doca_origin;
1356 } dmu_objset_clone_arg_t;
1359 dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
1361 dmu_objset_clone_arg_t *doca = arg;
1365 dsl_dataset_t *origin;
1366 dsl_pool_t *dp = dmu_tx_pool(tx);
1368 if (strchr(doca->doca_clone, '@') != NULL)
1369 return (SET_ERROR(EINVAL));
1371 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN)
1372 return (SET_ERROR(ENAMETOOLONG));
1374 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
1378 dsl_dir_rele(pdd, FTAG);
1379 return (SET_ERROR(EEXIST));
1382 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1383 doca->doca_cred, doca->doca_proc);
1385 dsl_dir_rele(pdd, FTAG);
1386 return (SET_ERROR(EDQUOT));
1389 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
1391 dsl_dir_rele(pdd, FTAG);
1395 /* You can only clone snapshots, not the head datasets. */
1396 if (!origin->ds_is_snapshot) {
1397 dsl_dataset_rele(origin, FTAG);
1398 dsl_dir_rele(pdd, FTAG);
1399 return (SET_ERROR(EINVAL));
1402 dsl_dataset_rele(origin, FTAG);
1403 dsl_dir_rele(pdd, FTAG);
1409 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
1411 dmu_objset_clone_arg_t *doca = arg;
1412 dsl_pool_t *dp = dmu_tx_pool(tx);
1415 dsl_dataset_t *origin, *ds;
1417 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
1419 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
1420 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
1422 obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
1423 doca->doca_cred, NULL, tx);
1425 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
1426 dsl_dataset_name(origin, namebuf);
1427 spa_history_log_internal_ds(ds, "clone", tx,
1428 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object);
1429 dsl_dataset_rele(ds, FTAG);
1430 dsl_dataset_rele(origin, FTAG);
1431 dsl_dir_rele(pdd, FTAG);
1435 dmu_objset_clone(const char *clone, const char *origin)
1437 dmu_objset_clone_arg_t doca;
1439 doca.doca_clone = clone;
1440 doca.doca_origin = origin;
1441 doca.doca_cred = CRED();
1442 doca.doca_proc = curproc;
1444 int rv = dsl_sync_task(clone,
1445 dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
1446 6, ZFS_SPACE_CHECK_NORMAL);
1449 zvol_create_minor(clone);
1455 dmu_objset_snapshot_one(const char *fsname, const char *snapname)
1458 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
1459 nvlist_t *snaps = fnvlist_alloc();
1461 fnvlist_add_boolean(snaps, longsnap);
1462 kmem_strfree(longsnap);
1463 err = dsl_dataset_snapshot(snaps, NULL, NULL);
1464 fnvlist_free(snaps);
1469 dmu_objset_upgrade_task_cb(void *data)
1471 objset_t *os = data;
1473 mutex_enter(&os->os_upgrade_lock);
1474 os->os_upgrade_status = EINTR;
1475 if (!os->os_upgrade_exit) {
1478 mutex_exit(&os->os_upgrade_lock);
1480 status = os->os_upgrade_cb(os);
1482 mutex_enter(&os->os_upgrade_lock);
1484 os->os_upgrade_status = status;
1486 os->os_upgrade_exit = B_TRUE;
1487 os->os_upgrade_id = 0;
1488 mutex_exit(&os->os_upgrade_lock);
1489 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1493 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb)
1495 if (os->os_upgrade_id != 0)
1498 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
1499 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag);
1501 mutex_enter(&os->os_upgrade_lock);
1502 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) {
1503 os->os_upgrade_exit = B_FALSE;
1504 os->os_upgrade_cb = cb;
1505 os->os_upgrade_id = taskq_dispatch(
1506 os->os_spa->spa_upgrade_taskq,
1507 dmu_objset_upgrade_task_cb, os, TQ_SLEEP);
1508 if (os->os_upgrade_id == TASKQID_INVALID) {
1509 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1510 os->os_upgrade_status = ENOMEM;
1513 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1515 mutex_exit(&os->os_upgrade_lock);
1519 dmu_objset_upgrade_stop(objset_t *os)
1521 mutex_enter(&os->os_upgrade_lock);
1522 os->os_upgrade_exit = B_TRUE;
1523 if (os->os_upgrade_id != 0) {
1524 taskqid_t id = os->os_upgrade_id;
1526 os->os_upgrade_id = 0;
1527 mutex_exit(&os->os_upgrade_lock);
1529 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) {
1530 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1532 txg_wait_synced(os->os_spa->spa_dsl_pool, 0);
1534 mutex_exit(&os->os_upgrade_lock);
1539 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx)
1543 while ((dn = multilist_sublist_head(list)) != NULL) {
1544 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
1545 ASSERT(dn->dn_dbuf->db_data_pending);
1547 * Initialize dn_zio outside dnode_sync() because the
1548 * meta-dnode needs to set it outside dnode_sync().
1550 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
1553 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
1554 multilist_sublist_remove(list, dn);
1557 * See the comment above dnode_rele_task() for an explanation
1558 * of why this dnode hold is always needed (even when not
1559 * doing user accounting).
1561 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes;
1562 (void) dnode_add_ref(dn, newlist);
1563 multilist_insert(newlist, dn);
1570 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
1573 blkptr_t *bp = zio->io_bp;
1575 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
1578 ASSERT(!BP_IS_EMBEDDED(bp));
1579 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
1580 ASSERT0(BP_GET_LEVEL(bp));
1583 * Update rootbp fill count: it should be the number of objects
1584 * allocated in the object set (not counting the "special"
1585 * objects that are stored in the objset_phys_t -- the meta
1586 * dnode and user/group/project accounting objects).
1588 for (int i = 0; i < dnp->dn_nblkptr; i++)
1589 fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
1591 BP_SET_FILL(bp, fill);
1593 if (os->os_dsl_dataset != NULL)
1594 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG);
1595 *os->os_rootbp = *bp;
1596 if (os->os_dsl_dataset != NULL)
1597 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG);
1601 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
1604 blkptr_t *bp = zio->io_bp;
1605 blkptr_t *bp_orig = &zio->io_bp_orig;
1608 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
1609 ASSERT(BP_EQUAL(bp, bp_orig));
1611 dsl_dataset_t *ds = os->os_dsl_dataset;
1612 dmu_tx_t *tx = os->os_synctx;
1614 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
1615 dsl_dataset_block_born(ds, bp, tx);
1617 kmem_free(bp, sizeof (*bp));
1620 typedef struct sync_dnodes_arg {
1621 multilist_t *sda_list;
1622 int sda_sublist_idx;
1623 multilist_t *sda_newlist;
1625 } sync_dnodes_arg_t;
1628 sync_dnodes_task(void *arg)
1630 sync_dnodes_arg_t *sda = arg;
1632 multilist_sublist_t *ms =
1633 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx);
1635 dmu_objset_sync_dnodes(ms, sda->sda_tx);
1637 multilist_sublist_unlock(ms);
1639 kmem_free(sda, sizeof (*sda));
1643 /* called from dsl */
1645 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
1648 zbookmark_phys_t zb;
1652 dbuf_dirty_record_t *dr;
1655 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP);
1656 *blkptr_copy = *os->os_rootbp;
1658 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg);
1660 ASSERT(dmu_tx_is_syncing(tx));
1661 /* XXX the write_done callback should really give us the tx... */
1664 if (os->os_dsl_dataset == NULL) {
1666 * This is the MOS. If we have upgraded,
1667 * spa_max_replication() could change, so reset
1670 os->os_copies = spa_max_replication(os->os_spa);
1674 * Create the root block IO
1676 SET_BOOKMARK(&zb, os->os_dsl_dataset ?
1677 os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
1678 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
1679 arc_release(os->os_phys_buf, &os->os_phys_buf);
1681 dmu_write_policy(os, NULL, 0, 0, &zp);
1684 * If we are either claiming the ZIL or doing a raw receive, write
1685 * out the os_phys_buf raw. Neither of these actions will effect the
1686 * MAC at this point.
1688 if (os->os_raw_receive ||
1689 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) {
1690 ASSERT(os->os_encrypted);
1691 arc_convert_to_raw(os->os_phys_buf,
1692 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER,
1693 DMU_OT_OBJSET, NULL, NULL, NULL);
1696 zio = arc_write(pio, os->os_spa, tx->tx_txg,
1697 blkptr_copy, os->os_phys_buf, dmu_os_is_l2cacheable(os),
1698 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done,
1699 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
1702 * Sync special dnodes - the parent IO for the sync is the root block
1704 DMU_META_DNODE(os)->dn_zio = zio;
1705 dnode_sync(DMU_META_DNODE(os), tx);
1707 os->os_phys->os_flags = os->os_flags;
1709 if (DMU_USERUSED_DNODE(os) &&
1710 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1711 DMU_USERUSED_DNODE(os)->dn_zio = zio;
1712 dnode_sync(DMU_USERUSED_DNODE(os), tx);
1713 DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
1714 dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
1717 if (DMU_PROJECTUSED_DNODE(os) &&
1718 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1719 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio;
1720 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx);
1723 txgoff = tx->tx_txg & TXG_MASK;
1726 * We must create the list here because it uses the
1727 * dn_dirty_link[] of this txg. But it may already
1728 * exist because we call dsl_dataset_sync() twice per txg.
1730 if (os->os_synced_dnodes.ml_sublists == NULL) {
1731 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t),
1732 offsetof(dnode_t, dn_dirty_link[txgoff]),
1733 dnode_multilist_index_func);
1735 ASSERT3U(os->os_synced_dnodes.ml_offset, ==,
1736 offsetof(dnode_t, dn_dirty_link[txgoff]));
1739 ml = &os->os_dirty_dnodes[txgoff];
1740 num_sublists = multilist_get_num_sublists(ml);
1741 for (int i = 0; i < num_sublists; i++) {
1742 if (multilist_sublist_is_empty_idx(ml, i))
1744 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP);
1746 sda->sda_sublist_idx = i;
1748 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
1749 sync_dnodes_task, sda, 0);
1750 /* callback frees sda */
1752 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq);
1754 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
1755 while ((dr = list_head(list)) != NULL) {
1756 ASSERT0(dr->dr_dbuf->db_level);
1757 list_remove(list, dr);
1758 zio_nowait(dr->dr_zio);
1761 /* Enable dnode backfill if enough objects have been freed. */
1762 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) {
1763 os->os_rescan_dnodes = B_TRUE;
1764 os->os_freed_dnodes = 0;
1768 * Free intent log blocks up to this tx.
1770 zil_sync(os->os_zil, tx);
1771 os->os_phys->os_zil_header = os->os_zil_header;
1776 dmu_objset_is_dirty(objset_t *os, uint64_t txg)
1778 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]));
1781 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES];
1784 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb)
1790 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data,
1791 zfs_file_info_t *zfi)
1793 file_info_cb_t *cb = file_cbs[os->os_phys->os_type];
1796 return (cb(bonustype, data, zfi));
1800 dmu_objset_userused_enabled(objset_t *os)
1802 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1803 file_cbs[os->os_phys->os_type] != NULL &&
1804 DMU_USERUSED_DNODE(os) != NULL);
1808 dmu_objset_userobjused_enabled(objset_t *os)
1810 return (dmu_objset_userused_enabled(os) &&
1811 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING));
1815 dmu_objset_projectquota_enabled(objset_t *os)
1817 return (file_cbs[os->os_phys->os_type] != NULL &&
1818 DMU_PROJECTUSED_DNODE(os) != NULL &&
1819 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA));
1822 typedef struct userquota_node {
1823 /* must be in the first filed, see userquota_update_cache() */
1824 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN];
1826 avl_node_t uqn_node;
1829 typedef struct userquota_cache {
1830 avl_tree_t uqc_user_deltas;
1831 avl_tree_t uqc_group_deltas;
1832 avl_tree_t uqc_project_deltas;
1833 } userquota_cache_t;
1836 userquota_compare(const void *l, const void *r)
1838 const userquota_node_t *luqn = l;
1839 const userquota_node_t *ruqn = r;
1843 * NB: can only access uqn_id because userquota_update_cache() doesn't
1844 * pass in an entire userquota_node_t.
1846 rv = strcmp(luqn->uqn_id, ruqn->uqn_id);
1848 return (TREE_ISIGN(rv));
1852 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx)
1855 userquota_node_t *uqn;
1857 ASSERT(dmu_tx_is_syncing(tx));
1860 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas,
1861 &cookie)) != NULL) {
1863 * os_userused_lock protects against concurrent calls to
1864 * zap_increment_int(). It's needed because zap_increment_int()
1865 * is not thread-safe (i.e. not atomic).
1867 mutex_enter(&os->os_userused_lock);
1868 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT,
1869 uqn->uqn_id, uqn->uqn_delta, tx));
1870 mutex_exit(&os->os_userused_lock);
1871 kmem_free(uqn, sizeof (*uqn));
1873 avl_destroy(&cache->uqc_user_deltas);
1876 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas,
1877 &cookie)) != NULL) {
1878 mutex_enter(&os->os_userused_lock);
1879 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT,
1880 uqn->uqn_id, uqn->uqn_delta, tx));
1881 mutex_exit(&os->os_userused_lock);
1882 kmem_free(uqn, sizeof (*uqn));
1884 avl_destroy(&cache->uqc_group_deltas);
1886 if (dmu_objset_projectquota_enabled(os)) {
1888 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas,
1889 &cookie)) != NULL) {
1890 mutex_enter(&os->os_userused_lock);
1891 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT,
1892 uqn->uqn_id, uqn->uqn_delta, tx));
1893 mutex_exit(&os->os_userused_lock);
1894 kmem_free(uqn, sizeof (*uqn));
1896 avl_destroy(&cache->uqc_project_deltas);
1901 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta)
1903 userquota_node_t *uqn;
1906 ASSERT(strlen(id) < sizeof (uqn->uqn_id));
1908 * Use id directly for searching because uqn_id is the first field of
1909 * userquota_node_t and fields after uqn_id won't be accessed in
1912 uqn = avl_find(avl, (const void *)id, &idx);
1914 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP);
1915 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id));
1916 avl_insert(avl, uqn, idx);
1918 uqn->uqn_delta += delta;
1922 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used,
1923 uint64_t flags, uint64_t user, uint64_t group, uint64_t project,
1926 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) {
1927 int64_t delta = DNODE_MIN_SIZE + used;
1933 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user);
1934 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
1936 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group);
1937 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
1939 if (dmu_objset_projectquota_enabled(os)) {
1940 (void) snprintf(name, sizeof (name), "%llx",
1941 (longlong_t)project);
1942 userquota_update_cache(&cache->uqc_project_deltas,
1949 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags,
1950 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract)
1952 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) {
1953 char name[20 + DMU_OBJACCT_PREFIX_LEN];
1954 int delta = subtract ? -1 : 1;
1956 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
1958 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
1960 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
1962 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
1964 if (dmu_objset_projectquota_enabled(os)) {
1965 (void) snprintf(name, sizeof (name),
1966 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project);
1967 userquota_update_cache(&cache->uqc_project_deltas,
1973 typedef struct userquota_updates_arg {
1975 int uua_sublist_idx;
1977 } userquota_updates_arg_t;
1980 userquota_updates_task(void *arg)
1982 userquota_updates_arg_t *uua = arg;
1983 objset_t *os = uua->uua_os;
1984 dmu_tx_t *tx = uua->uua_tx;
1986 userquota_cache_t cache = { { 0 } };
1988 multilist_sublist_t *list =
1989 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
1991 ASSERT(multilist_sublist_head(list) == NULL ||
1992 dmu_objset_userused_enabled(os));
1993 avl_create(&cache.uqc_user_deltas, userquota_compare,
1994 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
1995 avl_create(&cache.uqc_group_deltas, userquota_compare,
1996 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
1997 if (dmu_objset_projectquota_enabled(os))
1998 avl_create(&cache.uqc_project_deltas, userquota_compare,
1999 sizeof (userquota_node_t), offsetof(userquota_node_t,
2002 while ((dn = multilist_sublist_head(list)) != NULL) {
2004 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
2005 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
2006 dn->dn_phys->dn_flags &
2007 DNODE_FLAG_USERUSED_ACCOUNTED);
2009 flags = dn->dn_id_flags;
2011 if (flags & DN_ID_OLD_EXIST) {
2012 do_userquota_update(os, &cache, dn->dn_oldused,
2013 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid,
2014 dn->dn_oldprojid, B_TRUE);
2015 do_userobjquota_update(os, &cache, dn->dn_oldflags,
2016 dn->dn_olduid, dn->dn_oldgid,
2017 dn->dn_oldprojid, B_TRUE);
2019 if (flags & DN_ID_NEW_EXIST) {
2020 do_userquota_update(os, &cache,
2021 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags,
2022 dn->dn_newuid, dn->dn_newgid,
2023 dn->dn_newprojid, B_FALSE);
2024 do_userobjquota_update(os, &cache,
2025 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid,
2026 dn->dn_newprojid, B_FALSE);
2029 mutex_enter(&dn->dn_mtx);
2031 dn->dn_oldflags = 0;
2032 if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
2033 dn->dn_olduid = dn->dn_newuid;
2034 dn->dn_oldgid = dn->dn_newgid;
2035 dn->dn_oldprojid = dn->dn_newprojid;
2036 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2037 if (dn->dn_bonuslen == 0)
2038 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2040 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2042 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
2043 mutex_exit(&dn->dn_mtx);
2045 multilist_sublist_remove(list, dn);
2046 dnode_rele(dn, &os->os_synced_dnodes);
2048 do_userquota_cacheflush(os, &cache, tx);
2049 multilist_sublist_unlock(list);
2050 kmem_free(uua, sizeof (*uua));
2054 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being
2055 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be
2056 * evicted because the block containing the dnode can't be evicted until it is
2057 * written out. However, this hold is necessary to prevent the dnode_t from
2058 * being moved (via dnode_move()) while it's still referenced by
2059 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for
2060 * dirty_lightweight_leaf-type dirty records.
2062 * If we are doing user-object accounting, the dnode_rele() happens from
2063 * userquota_updates_task() instead.
2066 dnode_rele_task(void *arg)
2068 userquota_updates_arg_t *uua = arg;
2069 objset_t *os = uua->uua_os;
2071 multilist_sublist_t *list =
2072 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
2075 while ((dn = multilist_sublist_head(list)) != NULL) {
2076 multilist_sublist_remove(list, dn);
2077 dnode_rele(dn, &os->os_synced_dnodes);
2079 multilist_sublist_unlock(list);
2080 kmem_free(uua, sizeof (*uua));
2084 * Return TRUE if userquota updates are needed.
2087 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx)
2089 if (!dmu_objset_userused_enabled(os))
2093 * If this is a raw receive just return and handle accounting
2094 * later when we have the keys loaded. We also don't do user
2095 * accounting during claiming since the datasets are not owned
2096 * for the duration of claiming and this txg should only be
2097 * used for recovery.
2099 if (os->os_encrypted && dmu_objset_is_receiving(os))
2102 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg)
2105 /* Allocate the user/group/project used objects if necessary. */
2106 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2107 VERIFY0(zap_create_claim(os,
2108 DMU_USERUSED_OBJECT,
2109 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2110 VERIFY0(zap_create_claim(os,
2111 DMU_GROUPUSED_OBJECT,
2112 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2115 if (dmu_objset_projectquota_enabled(os) &&
2116 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2117 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT,
2118 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2124 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and
2125 * also release the holds on the dnodes from dmu_objset_sync_dnodes().
2126 * The caller must taskq_wait(dp_sync_taskq).
2129 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx)
2131 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx);
2133 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes);
2134 for (int i = 0; i < num_sublists; i++) {
2135 userquota_updates_arg_t *uua =
2136 kmem_alloc(sizeof (*uua), KM_SLEEP);
2138 uua->uua_sublist_idx = i;
2142 * If we don't need to update userquotas, use
2143 * dnode_rele_task() to call dnode_rele()
2145 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
2146 need_userquota ? userquota_updates_task : dnode_rele_task,
2148 /* callback frees uua */
2154 * Returns a pointer to data to find uid/gid from
2156 * If a dirty record for transaction group that is syncing can't
2157 * be found then NULL is returned. In the NULL case it is assumed
2158 * the uid/gid aren't changing.
2161 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
2163 dbuf_dirty_record_t *dr;
2166 if (db->db_dirtycnt == 0)
2167 return (db->db.db_data); /* Nothing is changing */
2169 dr = dbuf_find_dirty_eq(db, tx->tx_txg);
2174 if (dr->dr_dnode->dn_bonuslen == 0 &&
2175 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
2176 data = dr->dt.dl.dr_data->b_data;
2178 data = dr->dt.dl.dr_data;
2185 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
2187 objset_t *os = dn->dn_objset;
2189 dmu_buf_impl_t *db = NULL;
2190 int flags = dn->dn_id_flags;
2192 boolean_t have_spill = B_FALSE;
2194 if (!dmu_objset_userused_enabled(dn->dn_objset))
2198 * Raw receives introduce a problem with user accounting. Raw
2199 * receives cannot update the user accounting info because the
2200 * user ids and the sizes are encrypted. To guarantee that we
2201 * never end up with bad user accounting, we simply disable it
2202 * during raw receives. We also disable this for normal receives
2203 * so that an incremental raw receive may be done on top of an
2204 * existing non-raw receive.
2206 if (os->os_encrypted && dmu_objset_is_receiving(os))
2209 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
2210 DN_ID_CHKED_SPILL)))
2213 if (before && dn->dn_bonuslen != 0)
2214 data = DN_BONUS(dn->dn_phys);
2215 else if (!before && dn->dn_bonuslen != 0) {
2218 mutex_enter(&db->db_mtx);
2219 data = dmu_objset_userquota_find_data(db, tx);
2221 data = DN_BONUS(dn->dn_phys);
2223 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
2226 if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
2227 rf |= DB_RF_HAVESTRUCT;
2228 error = dmu_spill_hold_by_dnode(dn,
2229 rf | DB_RF_MUST_SUCCEED,
2230 FTAG, (dmu_buf_t **)&db);
2232 mutex_enter(&db->db_mtx);
2233 data = (before) ? db->db.db_data :
2234 dmu_objset_userquota_find_data(db, tx);
2235 have_spill = B_TRUE;
2237 mutex_enter(&dn->dn_mtx);
2238 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2239 mutex_exit(&dn->dn_mtx);
2244 * Must always call the callback in case the object
2245 * type has changed and that type isn't an object type to track
2247 zfs_file_info_t zfi;
2248 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi);
2252 dn->dn_olduid = zfi.zfi_user;
2253 dn->dn_oldgid = zfi.zfi_group;
2254 dn->dn_oldprojid = zfi.zfi_project;
2256 dn->dn_newuid = zfi.zfi_user;
2257 dn->dn_newgid = zfi.zfi_group;
2258 dn->dn_newprojid = zfi.zfi_project;
2262 * Preserve existing uid/gid when the callback can't determine
2263 * what the new uid/gid are and the callback returned EEXIST.
2264 * The EEXIST error tells us to just use the existing uid/gid.
2265 * If we don't know what the old values are then just assign
2266 * them to 0, since that is a new file being created.
2268 if (!before && data == NULL && error == EEXIST) {
2269 if (flags & DN_ID_OLD_EXIST) {
2270 dn->dn_newuid = dn->dn_olduid;
2271 dn->dn_newgid = dn->dn_oldgid;
2272 dn->dn_newprojid = dn->dn_oldprojid;
2276 dn->dn_newprojid = ZFS_DEFAULT_PROJID;
2282 mutex_exit(&db->db_mtx);
2284 mutex_enter(&dn->dn_mtx);
2285 if (error == 0 && before)
2286 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2287 if (error == 0 && !before)
2288 dn->dn_id_flags |= DN_ID_NEW_EXIST;
2291 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2293 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2295 mutex_exit(&dn->dn_mtx);
2297 dmu_buf_rele((dmu_buf_t *)db, FTAG);
2301 dmu_objset_userspace_present(objset_t *os)
2303 return (os->os_phys->os_flags &
2304 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
2308 dmu_objset_userobjspace_present(objset_t *os)
2310 return (os->os_phys->os_flags &
2311 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE);
2315 dmu_objset_projectquota_present(objset_t *os)
2317 return (os->os_phys->os_flags &
2318 OBJSET_FLAG_PROJECTQUOTA_COMPLETE);
2322 dmu_objset_space_upgrade(objset_t *os)
2328 * We simply need to mark every object dirty, so that it will be
2329 * synced out and now accounted. If this is called
2330 * concurrently, or if we already did some work before crashing,
2331 * that's fine, since we track each object's accounted state
2335 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
2340 mutex_enter(&os->os_upgrade_lock);
2341 if (os->os_upgrade_exit)
2342 err = SET_ERROR(EINTR);
2343 mutex_exit(&os->os_upgrade_lock);
2347 if (issig(JUSTLOOKING) && issig(FORREAL))
2348 return (SET_ERROR(EINTR));
2350 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
2353 tx = dmu_tx_create(os);
2354 dmu_tx_hold_bonus(tx, obj);
2355 objerr = dmu_tx_assign(tx, TXG_WAIT);
2357 dmu_buf_rele(db, FTAG);
2361 dmu_buf_will_dirty(db, tx);
2362 dmu_buf_rele(db, FTAG);
2369 dmu_objset_userspace_upgrade_cb(objset_t *os)
2373 if (dmu_objset_userspace_present(os))
2375 if (dmu_objset_is_snapshot(os))
2376 return (SET_ERROR(EINVAL));
2377 if (!dmu_objset_userused_enabled(os))
2378 return (SET_ERROR(ENOTSUP));
2380 err = dmu_objset_space_upgrade(os);
2384 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2385 txg_wait_synced(dmu_objset_pool(os), 0);
2390 dmu_objset_userspace_upgrade(objset_t *os)
2392 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb);
2396 dmu_objset_id_quota_upgrade_cb(objset_t *os)
2400 if (dmu_objset_userobjspace_present(os) &&
2401 dmu_objset_projectquota_present(os))
2403 if (dmu_objset_is_snapshot(os))
2404 return (SET_ERROR(EINVAL));
2405 if (!dmu_objset_userused_enabled(os))
2406 return (SET_ERROR(ENOTSUP));
2407 if (!dmu_objset_projectquota_enabled(os) &&
2408 dmu_objset_userobjspace_present(os))
2409 return (SET_ERROR(ENOTSUP));
2411 if (dmu_objset_userobjused_enabled(os))
2412 dmu_objset_ds(os)->ds_feature_activation[
2413 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
2414 if (dmu_objset_projectquota_enabled(os))
2415 dmu_objset_ds(os)->ds_feature_activation[
2416 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
2418 err = dmu_objset_space_upgrade(os);
2422 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2423 if (dmu_objset_userobjused_enabled(os))
2424 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
2425 if (dmu_objset_projectquota_enabled(os))
2426 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
2428 txg_wait_synced(dmu_objset_pool(os), 0);
2433 dmu_objset_id_quota_upgrade(objset_t *os)
2435 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb);
2439 dmu_objset_userobjspace_upgradable(objset_t *os)
2441 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2442 !dmu_objset_is_snapshot(os) &&
2443 dmu_objset_userobjused_enabled(os) &&
2444 !dmu_objset_userobjspace_present(os) &&
2445 spa_writeable(dmu_objset_spa(os)));
2449 dmu_objset_projectquota_upgradable(objset_t *os)
2451 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2452 !dmu_objset_is_snapshot(os) &&
2453 dmu_objset_projectquota_enabled(os) &&
2454 !dmu_objset_projectquota_present(os) &&
2455 spa_writeable(dmu_objset_spa(os)));
2459 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
2460 uint64_t *usedobjsp, uint64_t *availobjsp)
2462 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
2463 usedobjsp, availobjsp);
2467 dmu_objset_fsid_guid(objset_t *os)
2469 return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
2473 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
2475 stat->dds_type = os->os_phys->os_type;
2476 if (os->os_dsl_dataset)
2477 dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
2481 dmu_objset_stats(objset_t *os, nvlist_t *nv)
2483 ASSERT(os->os_dsl_dataset ||
2484 os->os_phys->os_type == DMU_OST_META);
2486 if (os->os_dsl_dataset != NULL)
2487 dsl_dataset_stats(os->os_dsl_dataset, nv);
2489 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
2490 os->os_phys->os_type);
2491 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
2492 dmu_objset_userspace_present(os));
2496 dmu_objset_is_snapshot(objset_t *os)
2498 if (os->os_dsl_dataset != NULL)
2499 return (os->os_dsl_dataset->ds_is_snapshot);
2505 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen,
2506 boolean_t *conflict)
2508 dsl_dataset_t *ds = os->os_dsl_dataset;
2511 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2512 return (SET_ERROR(ENOENT));
2514 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
2515 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored,
2516 MT_NORMALIZE, real, maxlen, conflict));
2520 dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
2521 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
2523 dsl_dataset_t *ds = os->os_dsl_dataset;
2524 zap_cursor_t cursor;
2525 zap_attribute_t attr;
2527 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
2529 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2530 return (SET_ERROR(ENOENT));
2532 zap_cursor_init_serialized(&cursor,
2533 ds->ds_dir->dd_pool->dp_meta_objset,
2534 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp);
2536 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2537 zap_cursor_fini(&cursor);
2538 return (SET_ERROR(ENOENT));
2541 if (strlen(attr.za_name) + 1 > namelen) {
2542 zap_cursor_fini(&cursor);
2543 return (SET_ERROR(ENAMETOOLONG));
2546 (void) strlcpy(name, attr.za_name, namelen);
2548 *idp = attr.za_first_integer;
2550 *case_conflict = attr.za_normalization_conflict;
2551 zap_cursor_advance(&cursor);
2552 *offp = zap_cursor_serialize(&cursor);
2553 zap_cursor_fini(&cursor);
2559 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value)
2561 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value));
2565 dmu_dir_list_next(objset_t *os, int namelen, char *name,
2566 uint64_t *idp, uint64_t *offp)
2568 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
2569 zap_cursor_t cursor;
2570 zap_attribute_t attr;
2572 /* there is no next dir on a snapshot! */
2573 if (os->os_dsl_dataset->ds_object !=
2574 dsl_dir_phys(dd)->dd_head_dataset_obj)
2575 return (SET_ERROR(ENOENT));
2577 zap_cursor_init_serialized(&cursor,
2578 dd->dd_pool->dp_meta_objset,
2579 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp);
2581 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2582 zap_cursor_fini(&cursor);
2583 return (SET_ERROR(ENOENT));
2586 if (strlen(attr.za_name) + 1 > namelen) {
2587 zap_cursor_fini(&cursor);
2588 return (SET_ERROR(ENAMETOOLONG));
2591 (void) strlcpy(name, attr.za_name, namelen);
2593 *idp = attr.za_first_integer;
2594 zap_cursor_advance(&cursor);
2595 *offp = zap_cursor_serialize(&cursor);
2596 zap_cursor_fini(&cursor);
2601 typedef struct dmu_objset_find_ctx {
2605 char *dc_ddname; /* last component of ddobj's name */
2606 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *);
2609 kmutex_t *dc_error_lock;
2611 } dmu_objset_find_ctx_t;
2614 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp)
2616 dsl_pool_t *dp = dcp->dc_dp;
2620 zap_attribute_t *attr;
2624 /* don't process if there already was an error */
2625 if (*dcp->dc_error != 0)
2629 * Note: passing the name (dc_ddname) here is optional, but it
2630 * improves performance because we don't need to call
2631 * zap_value_search() to determine the name.
2633 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd);
2637 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2638 if (dd->dd_myname[0] == '$') {
2639 dsl_dir_rele(dd, FTAG);
2643 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2644 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2647 * Iterate over all children.
2649 if (dcp->dc_flags & DS_FIND_CHILDREN) {
2650 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2651 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2652 zap_cursor_retrieve(&zc, attr) == 0;
2653 (void) zap_cursor_advance(&zc)) {
2654 ASSERT3U(attr->za_integer_length, ==,
2656 ASSERT3U(attr->za_num_integers, ==, 1);
2658 dmu_objset_find_ctx_t *child_dcp =
2659 kmem_alloc(sizeof (*child_dcp), KM_SLEEP);
2661 child_dcp->dc_ddobj = attr->za_first_integer;
2662 child_dcp->dc_ddname = spa_strdup(attr->za_name);
2663 if (dcp->dc_tq != NULL)
2664 (void) taskq_dispatch(dcp->dc_tq,
2665 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP);
2667 dmu_objset_find_dp_impl(child_dcp);
2669 zap_cursor_fini(&zc);
2673 * Iterate over all snapshots.
2675 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) {
2677 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2682 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2683 dsl_dataset_rele(ds, FTAG);
2685 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2686 zap_cursor_retrieve(&zc, attr) == 0;
2687 (void) zap_cursor_advance(&zc)) {
2688 ASSERT3U(attr->za_integer_length, ==,
2690 ASSERT3U(attr->za_num_integers, ==, 1);
2692 err = dsl_dataset_hold_obj(dp,
2693 attr->za_first_integer, FTAG, &ds);
2696 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2697 dsl_dataset_rele(ds, FTAG);
2701 zap_cursor_fini(&zc);
2705 kmem_free(attr, sizeof (zap_attribute_t));
2708 dsl_dir_rele(dd, FTAG);
2715 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2718 * Note: we hold the dir while calling dsl_dataset_hold_obj() so
2719 * that the dir will remain cached, and we won't have to re-instantiate
2720 * it (which could be expensive due to finding its name via
2721 * zap_value_search()).
2723 dsl_dir_rele(dd, FTAG);
2726 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2727 dsl_dataset_rele(ds, FTAG);
2731 mutex_enter(dcp->dc_error_lock);
2732 /* only keep first error */
2733 if (*dcp->dc_error == 0)
2734 *dcp->dc_error = err;
2735 mutex_exit(dcp->dc_error_lock);
2738 if (dcp->dc_ddname != NULL)
2739 spa_strfree(dcp->dc_ddname);
2740 kmem_free(dcp, sizeof (*dcp));
2744 dmu_objset_find_dp_cb(void *arg)
2746 dmu_objset_find_ctx_t *dcp = arg;
2747 dsl_pool_t *dp = dcp->dc_dp;
2750 * We need to get a pool_config_lock here, as there are several
2751 * assert(pool_config_held) down the stack. Getting a lock via
2752 * dsl_pool_config_enter is risky, as it might be stalled by a
2753 * pending writer. This would deadlock, as the write lock can
2754 * only be granted when our parent thread gives up the lock.
2755 * The _prio interface gives us priority over a pending writer.
2757 dsl_pool_config_enter_prio(dp, FTAG);
2759 dmu_objset_find_dp_impl(dcp);
2761 dsl_pool_config_exit(dp, FTAG);
2765 * Find objsets under and including ddobj, call func(ds) on each.
2766 * The order for the enumeration is completely undefined.
2767 * func is called with dsl_pool_config held.
2770 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
2771 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
2776 dmu_objset_find_ctx_t *dcp;
2779 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL);
2780 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP);
2783 dcp->dc_ddobj = ddobj;
2784 dcp->dc_ddname = NULL;
2785 dcp->dc_func = func;
2787 dcp->dc_flags = flags;
2788 dcp->dc_error_lock = &err_lock;
2789 dcp->dc_error = &error;
2791 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) {
2793 * In case a write lock is held we can't make use of
2794 * parallelism, as down the stack of the worker threads
2795 * the lock is asserted via dsl_pool_config_held.
2796 * In case of a read lock this is solved by getting a read
2797 * lock in each worker thread, which isn't possible in case
2798 * of a writer lock. So we fall back to the synchronous path
2800 * In the future it might be possible to get some magic into
2801 * dsl_pool_config_held in a way that it returns true for
2802 * the worker threads so that a single lock held from this
2803 * thread suffices. For now, stay single threaded.
2805 dmu_objset_find_dp_impl(dcp);
2806 mutex_destroy(&err_lock);
2811 ntasks = dmu_find_threads;
2813 ntasks = vdev_count_leaves(dp->dp_spa) * 4;
2814 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks,
2817 kmem_free(dcp, sizeof (*dcp));
2818 mutex_destroy(&err_lock);
2820 return (SET_ERROR(ENOMEM));
2824 /* dcp will be freed by task */
2825 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP);
2828 * PORTING: this code relies on the property of taskq_wait to wait
2829 * until no more tasks are queued and no more tasks are active. As
2830 * we always queue new tasks from within other tasks, task_wait
2831 * reliably waits for the full recursion to finish, even though we
2832 * enqueue new tasks after taskq_wait has been called.
2833 * On platforms other than illumos, taskq_wait may not have this
2838 mutex_destroy(&err_lock);
2844 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
2845 * The dp_config_rwlock must not be held when this is called, and it
2846 * will not be held when the callback is called.
2847 * Therefore this function should only be used when the pool is not changing
2848 * (e.g. in syncing context), or the callback can deal with the possible races.
2851 dmu_objset_find_impl(spa_t *spa, const char *name,
2852 int func(const char *, void *), void *arg, int flags)
2855 dsl_pool_t *dp = spa_get_dsl(spa);
2858 zap_attribute_t *attr;
2863 dsl_pool_config_enter(dp, FTAG);
2865 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
2867 dsl_pool_config_exit(dp, FTAG);
2871 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2872 if (dd->dd_myname[0] == '$') {
2873 dsl_dir_rele(dd, FTAG);
2874 dsl_pool_config_exit(dp, FTAG);
2878 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2879 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2882 * Iterate over all children.
2884 if (flags & DS_FIND_CHILDREN) {
2885 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2886 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2887 zap_cursor_retrieve(&zc, attr) == 0;
2888 (void) zap_cursor_advance(&zc)) {
2889 ASSERT3U(attr->za_integer_length, ==,
2891 ASSERT3U(attr->za_num_integers, ==, 1);
2893 child = kmem_asprintf("%s/%s", name, attr->za_name);
2894 dsl_pool_config_exit(dp, FTAG);
2895 err = dmu_objset_find_impl(spa, child,
2897 dsl_pool_config_enter(dp, FTAG);
2898 kmem_strfree(child);
2902 zap_cursor_fini(&zc);
2905 dsl_dir_rele(dd, FTAG);
2906 dsl_pool_config_exit(dp, FTAG);
2907 kmem_free(attr, sizeof (zap_attribute_t));
2913 * Iterate over all snapshots.
2915 if (flags & DS_FIND_SNAPSHOTS) {
2916 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2921 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2922 dsl_dataset_rele(ds, FTAG);
2924 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2925 zap_cursor_retrieve(&zc, attr) == 0;
2926 (void) zap_cursor_advance(&zc)) {
2927 ASSERT3U(attr->za_integer_length, ==,
2929 ASSERT3U(attr->za_num_integers, ==, 1);
2931 child = kmem_asprintf("%s@%s",
2932 name, attr->za_name);
2933 dsl_pool_config_exit(dp, FTAG);
2934 err = func(child, arg);
2935 dsl_pool_config_enter(dp, FTAG);
2936 kmem_strfree(child);
2940 zap_cursor_fini(&zc);
2944 dsl_dir_rele(dd, FTAG);
2945 kmem_free(attr, sizeof (zap_attribute_t));
2946 dsl_pool_config_exit(dp, FTAG);
2951 /* Apply to self. */
2952 return (func(name, arg));
2956 * See comment above dmu_objset_find_impl().
2959 dmu_objset_find(const char *name, int func(const char *, void *), void *arg,
2965 error = spa_open(name, &spa, FTAG);
2968 error = dmu_objset_find_impl(spa, name, func, arg, flags);
2969 spa_close(spa, FTAG);
2974 dmu_objset_incompatible_encryption_version(objset_t *os)
2976 return (dsl_dir_incompatible_encryption_version(
2977 os->os_dsl_dataset->ds_dir));
2981 dmu_objset_set_user(objset_t *os, void *user_ptr)
2983 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2984 os->os_user_ptr = user_ptr;
2988 dmu_objset_get_user(objset_t *os)
2990 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
2991 return (os->os_user_ptr);
2995 * Determine name of filesystem, given name of snapshot.
2996 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes
2999 dmu_fsname(const char *snapname, char *buf)
3001 char *atp = strchr(snapname, '@');
3003 return (SET_ERROR(EINVAL));
3004 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN)
3005 return (SET_ERROR(ENAMETOOLONG));
3006 (void) strlcpy(buf, snapname, atp - snapname + 1);
3011 * Call when we think we're going to write/free space in open context
3012 * to track the amount of dirty data in the open txg, which is also the
3013 * amount of memory that can not be evicted until this txg syncs.
3015 * Note that there are two conditions where this can be called from
3018 * [1] When we just created the dataset, in which case we go on with
3019 * updating any accounting of dirty data as usual.
3020 * [2] When we are dirtying MOS data, in which case we only update the
3021 * pool's accounting of dirty data.
3024 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx)
3026 dsl_dataset_t *ds = os->os_dsl_dataset;
3027 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space);
3030 dsl_dir_willuse_space(ds->ds_dir, aspace, tx);
3033 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx);
3036 #if defined(_KERNEL)
3037 EXPORT_SYMBOL(dmu_objset_zil);
3038 EXPORT_SYMBOL(dmu_objset_pool);
3039 EXPORT_SYMBOL(dmu_objset_ds);
3040 EXPORT_SYMBOL(dmu_objset_type);
3041 EXPORT_SYMBOL(dmu_objset_name);
3042 EXPORT_SYMBOL(dmu_objset_hold);
3043 EXPORT_SYMBOL(dmu_objset_hold_flags);
3044 EXPORT_SYMBOL(dmu_objset_own);
3045 EXPORT_SYMBOL(dmu_objset_rele);
3046 EXPORT_SYMBOL(dmu_objset_rele_flags);
3047 EXPORT_SYMBOL(dmu_objset_disown);
3048 EXPORT_SYMBOL(dmu_objset_from_ds);
3049 EXPORT_SYMBOL(dmu_objset_create);
3050 EXPORT_SYMBOL(dmu_objset_clone);
3051 EXPORT_SYMBOL(dmu_objset_stats);
3052 EXPORT_SYMBOL(dmu_objset_fast_stat);
3053 EXPORT_SYMBOL(dmu_objset_spa);
3054 EXPORT_SYMBOL(dmu_objset_space);
3055 EXPORT_SYMBOL(dmu_objset_fsid_guid);
3056 EXPORT_SYMBOL(dmu_objset_find);
3057 EXPORT_SYMBOL(dmu_objset_byteswap);
3058 EXPORT_SYMBOL(dmu_objset_evict_dbufs);
3059 EXPORT_SYMBOL(dmu_objset_snap_cmtime);
3060 EXPORT_SYMBOL(dmu_objset_dnodesize);
3062 EXPORT_SYMBOL(dmu_objset_sync);
3063 EXPORT_SYMBOL(dmu_objset_is_dirty);
3064 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats);
3065 EXPORT_SYMBOL(dmu_objset_create_impl);
3066 EXPORT_SYMBOL(dmu_objset_open_impl);
3067 EXPORT_SYMBOL(dmu_objset_evict);
3068 EXPORT_SYMBOL(dmu_objset_register_type);
3069 EXPORT_SYMBOL(dmu_objset_sync_done);
3070 EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
3071 EXPORT_SYMBOL(dmu_objset_userused_enabled);
3072 EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
3073 EXPORT_SYMBOL(dmu_objset_userspace_present);
3074 EXPORT_SYMBOL(dmu_objset_userobjused_enabled);
3075 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable);
3076 EXPORT_SYMBOL(dmu_objset_userobjspace_present);
3077 EXPORT_SYMBOL(dmu_objset_projectquota_enabled);
3078 EXPORT_SYMBOL(dmu_objset_projectquota_present);
3079 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable);
3080 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade);