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 prefetch_changed_cb(void *arg, uint64_t newval)
272 * Inheritance should have been done by now.
274 ASSERT(newval == ZFS_PREFETCH_ALL || newval == ZFS_PREFETCH_NONE ||
275 newval == ZFS_PREFETCH_METADATA);
276 os->os_prefetch = newval;
280 sync_changed_cb(void *arg, uint64_t newval)
285 * Inheritance and range checking should have been done by now.
287 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
288 newval == ZFS_SYNC_DISABLED);
290 os->os_sync = newval;
292 zil_set_sync(os->os_zil, newval);
296 redundant_metadata_changed_cb(void *arg, uint64_t newval)
301 * Inheritance and range checking should have been done by now.
303 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
304 newval == ZFS_REDUNDANT_METADATA_MOST ||
305 newval == ZFS_REDUNDANT_METADATA_SOME ||
306 newval == ZFS_REDUNDANT_METADATA_NONE);
308 os->os_redundant_metadata = newval;
312 dnodesize_changed_cb(void *arg, uint64_t newval)
317 case ZFS_DNSIZE_LEGACY:
318 os->os_dnodesize = DNODE_MIN_SIZE;
320 case ZFS_DNSIZE_AUTO:
322 * Choose a dnode size that will work well for most
323 * workloads if the user specified "auto". Future code
324 * improvements could dynamically select a dnode size
325 * based on observed workload patterns.
327 os->os_dnodesize = DNODE_MIN_SIZE * 2;
334 os->os_dnodesize = newval;
340 smallblk_changed_cb(void *arg, uint64_t newval)
345 * Inheritance and range checking should have been done by now.
347 ASSERT(newval <= SPA_MAXBLOCKSIZE);
348 ASSERT(ISP2(newval));
350 os->os_zpl_special_smallblock = newval;
354 logbias_changed_cb(void *arg, uint64_t newval)
358 ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
359 newval == ZFS_LOGBIAS_THROUGHPUT);
360 os->os_logbias = newval;
362 zil_set_logbias(os->os_zil, newval);
366 recordsize_changed_cb(void *arg, uint64_t newval)
370 os->os_recordsize = newval;
374 dmu_objset_byteswap(void *buf, size_t size)
376 objset_phys_t *osp = buf;
378 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 ||
379 size == sizeof (objset_phys_t));
380 dnode_byteswap(&osp->os_meta_dnode);
381 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
382 osp->os_type = BSWAP_64(osp->os_type);
383 osp->os_flags = BSWAP_64(osp->os_flags);
384 if (size >= OBJSET_PHYS_SIZE_V2) {
385 dnode_byteswap(&osp->os_userused_dnode);
386 dnode_byteswap(&osp->os_groupused_dnode);
387 if (size >= sizeof (objset_phys_t))
388 dnode_byteswap(&osp->os_projectused_dnode);
393 * The hash is a CRC-based hash of the objset_t pointer and the object number.
396 dnode_hash(const objset_t *os, uint64_t obj)
398 uintptr_t osv = (uintptr_t)os;
399 uint64_t crc = -1ULL;
401 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
403 * The low 6 bits of the pointer don't have much entropy, because
404 * the objset_t is larger than 2^6 bytes long.
406 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
407 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
408 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
409 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF];
411 crc ^= (osv>>14) ^ (obj>>24);
417 dnode_multilist_index_func(multilist_t *ml, void *obj)
422 * The low order bits of the hash value are thought to be
423 * distributed evenly. Otherwise, in the case that the multilist
424 * has a power of two number of sublists, each sublists' usage
425 * would not be evenly distributed. In this context full 64bit
426 * division would be a waste of time, so limit it to 32 bits.
428 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) %
429 multilist_get_num_sublists(ml));
432 static inline boolean_t
433 dmu_os_is_l2cacheable(objset_t *os)
435 if (os->os_secondary_cache == ZFS_CACHE_ALL ||
436 os->os_secondary_cache == ZFS_CACHE_METADATA) {
437 if (l2arc_exclude_special == 0)
440 blkptr_t *bp = os->os_rootbp;
441 if (bp == NULL || BP_IS_HOLE(bp))
443 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva);
444 vdev_t *rvd = os->os_spa->spa_root_vdev;
447 if (vdev < rvd->vdev_children)
448 vd = rvd->vdev_child[vdev];
453 if (vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL &&
454 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP)
461 * Instantiates the objset_t in-memory structure corresponding to the
462 * objset_phys_t that's pointed to by the specified blkptr_t.
465 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
471 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
472 ASSERT(!BP_IS_REDACTED(bp));
475 * We need the pool config lock to get properties.
477 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool));
480 * The $ORIGIN dataset (if it exists) doesn't have an associated
481 * objset, so there's no reason to open it. The $ORIGIN dataset
482 * will not exist on pools older than SPA_VERSION_ORIGIN.
484 if (ds != NULL && spa_get_dsl(spa) != NULL &&
485 spa_get_dsl(spa)->dp_origin_snap != NULL) {
486 ASSERT3P(ds->ds_dir, !=,
487 spa_get_dsl(spa)->dp_origin_snap->ds_dir);
490 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
491 os->os_dsl_dataset = ds;
494 if (!BP_IS_HOLE(os->os_rootbp)) {
495 arc_flags_t aflags = ARC_FLAG_WAIT;
498 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL;
499 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
500 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
502 if (dmu_os_is_l2cacheable(os))
503 aflags |= ARC_FLAG_L2CACHE;
505 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) {
506 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
507 ASSERT(BP_IS_AUTHENTICATED(bp));
508 zio_flags |= ZIO_FLAG_RAW;
511 dprintf_bp(os->os_rootbp, "reading %s", "");
512 err = arc_read(NULL, spa, os->os_rootbp,
513 arc_getbuf_func, &os->os_phys_buf,
514 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
516 kmem_free(os, sizeof (objset_t));
517 /* convert checksum errors into IO errors */
519 err = SET_ERROR(EIO);
523 if (spa_version(spa) < SPA_VERSION_USERSPACE)
524 size = OBJSET_PHYS_SIZE_V1;
525 else if (!spa_feature_is_enabled(spa,
526 SPA_FEATURE_PROJECT_QUOTA))
527 size = OBJSET_PHYS_SIZE_V2;
529 size = sizeof (objset_phys_t);
531 /* Increase the blocksize if we are permitted. */
532 if (arc_buf_size(os->os_phys_buf) < size) {
533 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf,
534 ARC_BUFC_METADATA, size);
535 memset(buf->b_data, 0, size);
536 memcpy(buf->b_data, os->os_phys_buf->b_data,
537 arc_buf_size(os->os_phys_buf));
538 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
539 os->os_phys_buf = buf;
542 os->os_phys = os->os_phys_buf->b_data;
543 os->os_flags = os->os_phys->os_flags;
545 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
546 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1;
547 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf,
548 ARC_BUFC_METADATA, size);
549 os->os_phys = os->os_phys_buf->b_data;
550 memset(os->os_phys, 0, size);
553 * These properties will be filled in by the logic in zfs_get_zplprop()
554 * when they are queried for the first time.
556 os->os_version = OBJSET_PROP_UNINITIALIZED;
557 os->os_normalization = OBJSET_PROP_UNINITIALIZED;
558 os->os_utf8only = OBJSET_PROP_UNINITIALIZED;
559 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED;
562 * Note: the changed_cb will be called once before the register
563 * func returns, thus changing the checksum/compression from the
564 * default (fletcher2/off). Snapshots don't need to know about
565 * checksum/compression/copies.
568 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0);
570 err = dsl_prop_register(ds,
571 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
572 primary_cache_changed_cb, os);
574 err = dsl_prop_register(ds,
575 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
576 secondary_cache_changed_cb, os);
579 err = dsl_prop_register(ds,
580 zfs_prop_to_name(ZFS_PROP_PREFETCH),
581 prefetch_changed_cb, os);
583 if (!ds->ds_is_snapshot) {
585 err = dsl_prop_register(ds,
586 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
587 checksum_changed_cb, os);
590 err = dsl_prop_register(ds,
591 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
592 compression_changed_cb, os);
595 err = dsl_prop_register(ds,
596 zfs_prop_to_name(ZFS_PROP_COPIES),
597 copies_changed_cb, os);
600 err = dsl_prop_register(ds,
601 zfs_prop_to_name(ZFS_PROP_DEDUP),
602 dedup_changed_cb, os);
605 err = dsl_prop_register(ds,
606 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
607 logbias_changed_cb, os);
610 err = dsl_prop_register(ds,
611 zfs_prop_to_name(ZFS_PROP_SYNC),
612 sync_changed_cb, os);
615 err = dsl_prop_register(ds,
617 ZFS_PROP_REDUNDANT_METADATA),
618 redundant_metadata_changed_cb, os);
621 err = dsl_prop_register(ds,
622 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
623 recordsize_changed_cb, os);
626 err = dsl_prop_register(ds,
627 zfs_prop_to_name(ZFS_PROP_DNODESIZE),
628 dnodesize_changed_cb, os);
631 err = dsl_prop_register(ds,
633 ZFS_PROP_SPECIAL_SMALL_BLOCKS),
634 smallblk_changed_cb, os);
638 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
639 kmem_free(os, sizeof (objset_t));
643 /* It's the meta-objset. */
644 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
645 os->os_compress = ZIO_COMPRESS_ON;
646 os->os_complevel = ZIO_COMPLEVEL_DEFAULT;
647 os->os_encrypted = B_FALSE;
648 os->os_copies = spa_max_replication(spa);
649 os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
650 os->os_dedup_verify = B_FALSE;
651 os->os_logbias = ZFS_LOGBIAS_LATENCY;
652 os->os_sync = ZFS_SYNC_STANDARD;
653 os->os_primary_cache = ZFS_CACHE_ALL;
654 os->os_secondary_cache = ZFS_CACHE_ALL;
655 os->os_dnodesize = DNODE_MIN_SIZE;
656 os->os_prefetch = ZFS_PREFETCH_ALL;
659 if (ds == NULL || !ds->ds_is_snapshot)
660 os->os_zil_header = os->os_phys->os_zil_header;
661 os->os_zil = zil_alloc(os, &os->os_zil_header);
663 for (i = 0; i < TXG_SIZE; i++) {
664 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
665 offsetof(dnode_t, dn_dirty_link[i]),
666 dnode_multilist_index_func);
668 list_create(&os->os_dnodes, sizeof (dnode_t),
669 offsetof(dnode_t, dn_link));
670 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
671 offsetof(dmu_buf_impl_t, db_link));
673 list_link_init(&os->os_evicting_node);
675 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
676 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL);
677 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
678 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
679 os->os_obj_next_percpu_len = boot_ncpus;
680 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len *
681 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP);
683 dnode_special_open(os, &os->os_phys->os_meta_dnode,
684 DMU_META_DNODE_OBJECT, &os->os_meta_dnode);
685 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) {
686 dnode_special_open(os, &os->os_phys->os_userused_dnode,
687 DMU_USERUSED_OBJECT, &os->os_userused_dnode);
688 dnode_special_open(os, &os->os_phys->os_groupused_dnode,
689 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode);
690 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf))
691 dnode_special_open(os,
692 &os->os_phys->os_projectused_dnode,
693 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode);
696 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL);
703 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
708 * We need the pool_config lock to manipulate the dsl_dataset_t.
709 * Even if the dataset is long-held, we need the pool_config lock
710 * to open the objset, as it needs to get properties.
712 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
714 mutex_enter(&ds->ds_opening_lock);
715 if (ds->ds_objset == NULL) {
717 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
718 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
719 ds, dsl_dataset_get_blkptr(ds), &os);
720 rrw_exit(&ds->ds_bp_rwlock, FTAG);
723 mutex_enter(&ds->ds_lock);
724 ASSERT(ds->ds_objset == NULL);
726 mutex_exit(&ds->ds_lock);
729 *osp = ds->ds_objset;
730 mutex_exit(&ds->ds_opening_lock);
735 * Holds the pool while the objset is held. Therefore only one objset
736 * can be held at a time.
739 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag,
745 ds_hold_flags_t flags;
747 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
748 err = dsl_pool_hold(name, tag, &dp);
751 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds);
753 dsl_pool_rele(dp, tag);
757 err = dmu_objset_from_ds(ds, osp);
759 dsl_dataset_rele(ds, tag);
760 dsl_pool_rele(dp, tag);
767 dmu_objset_hold(const char *name, const void *tag, objset_t **osp)
769 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp));
773 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type,
774 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
778 int err = dmu_objset_from_ds(ds, osp);
781 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
782 return (SET_ERROR(EINVAL));
783 } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
784 return (SET_ERROR(EROFS));
785 } else if (!readonly && decrypt &&
786 dsl_dir_incompatible_encryption_version(ds->ds_dir)) {
787 return (SET_ERROR(EROFS));
790 /* if we are decrypting, we can now check MACs in os->os_phys_buf */
791 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) {
794 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT,
795 ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
796 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa,
801 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf));
808 * dsl_pool must not be held when this is called.
809 * Upon successful return, there will be a longhold on the dataset,
810 * and the dsl_pool will not be held.
813 dmu_objset_own(const char *name, dmu_objset_type_t type,
814 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
819 ds_hold_flags_t flags;
821 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
822 err = dsl_pool_hold(name, FTAG, &dp);
825 err = dsl_dataset_own(dp, name, flags, tag, &ds);
827 dsl_pool_rele(dp, FTAG);
830 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
832 dsl_dataset_disown(ds, flags, tag);
833 dsl_pool_rele(dp, FTAG);
838 * User accounting requires the dataset to be decrypted and rw.
839 * We also don't begin user accounting during claiming to help
840 * speed up pool import times and to keep this txg reserved
841 * completely for recovery work.
843 if (!readonly && !dp->dp_spa->spa_claiming &&
844 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) {
845 if (dmu_objset_userobjspace_upgradable(*osp) ||
846 dmu_objset_projectquota_upgradable(*osp)) {
847 dmu_objset_id_quota_upgrade(*osp);
848 } else if (dmu_objset_userused_enabled(*osp)) {
849 dmu_objset_userspace_upgrade(*osp);
853 dsl_pool_rele(dp, FTAG);
858 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
859 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp)
863 ds_hold_flags_t flags;
865 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
866 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds);
870 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
872 dsl_dataset_disown(ds, flags, tag);
880 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag)
882 ds_hold_flags_t flags;
883 dsl_pool_t *dp = dmu_objset_pool(os);
885 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
886 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag);
887 dsl_pool_rele(dp, tag);
891 dmu_objset_rele(objset_t *os, const void *tag)
893 dmu_objset_rele_flags(os, B_FALSE, tag);
897 * When we are called, os MUST refer to an objset associated with a dataset
898 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
899 * == tag. We will then release and reacquire ownership of the dataset while
900 * holding the pool config_rwlock to avoid intervening namespace or ownership
903 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
904 * release the hold on its dataset and acquire a new one on the dataset of the
905 * same name so that it can be partially torn down and reconstructed.
908 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
909 boolean_t decrypt, const void *tag)
912 char name[ZFS_MAX_DATASET_NAME_LEN];
913 ds_hold_flags_t flags;
915 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
916 VERIFY3P(ds, !=, NULL);
917 VERIFY3P(ds->ds_owner, ==, tag);
918 VERIFY(dsl_dataset_long_held(ds));
920 dsl_dataset_name(ds, name);
921 dp = ds->ds_dir->dd_pool;
922 dsl_pool_config_enter(dp, FTAG);
923 dsl_dataset_disown(ds, flags, tag);
924 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds));
925 dsl_pool_config_exit(dp, FTAG);
929 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag)
931 ds_hold_flags_t flags;
933 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
935 * Stop upgrading thread
937 dmu_objset_upgrade_stop(os);
938 dsl_dataset_disown(os->os_dsl_dataset, flags, tag);
942 dmu_objset_evict_dbufs(objset_t *os)
947 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP);
949 mutex_enter(&os->os_lock);
950 dn = list_head(&os->os_dnodes);
953 * Skip dnodes without holds. We have to do this dance
954 * because dnode_add_ref() only works if there is already a
955 * hold. If the dnode has no holds, then it has no dbufs.
957 if (dnode_add_ref(dn, FTAG)) {
958 list_insert_after(&os->os_dnodes, dn, dn_marker);
959 mutex_exit(&os->os_lock);
961 dnode_evict_dbufs(dn);
962 dnode_rele(dn, FTAG);
964 mutex_enter(&os->os_lock);
965 dn = list_next(&os->os_dnodes, dn_marker);
966 list_remove(&os->os_dnodes, dn_marker);
968 dn = list_next(&os->os_dnodes, dn);
971 mutex_exit(&os->os_lock);
973 kmem_free(dn_marker, sizeof (dnode_t));
975 if (DMU_USERUSED_DNODE(os) != NULL) {
976 if (DMU_PROJECTUSED_DNODE(os) != NULL)
977 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os));
978 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os));
979 dnode_evict_dbufs(DMU_USERUSED_DNODE(os));
981 dnode_evict_dbufs(DMU_META_DNODE(os));
985 * Objset eviction processing is split into into two pieces.
986 * The first marks the objset as evicting, evicts any dbufs that
987 * have a refcount of zero, and then queues up the objset for the
988 * second phase of eviction. Once os->os_dnodes has been cleared by
989 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed.
990 * The second phase closes the special dnodes, dequeues the objset from
991 * the list of those undergoing eviction, and finally frees the objset.
993 * NOTE: Due to asynchronous eviction processing (invocation of
994 * dnode_buf_pageout()), it is possible for the meta dnode for the
995 * objset to have no holds even though os->os_dnodes is not empty.
998 dmu_objset_evict(objset_t *os)
1000 dsl_dataset_t *ds = os->os_dsl_dataset;
1002 for (int t = 0; t < TXG_SIZE; t++)
1003 ASSERT(!dmu_objset_is_dirty(os, t));
1006 dsl_prop_unregister_all(ds, os);
1011 dmu_objset_evict_dbufs(os);
1013 mutex_enter(&os->os_lock);
1014 spa_evicting_os_register(os->os_spa, os);
1015 if (list_is_empty(&os->os_dnodes)) {
1016 mutex_exit(&os->os_lock);
1017 dmu_objset_evict_done(os);
1019 mutex_exit(&os->os_lock);
1026 dmu_objset_evict_done(objset_t *os)
1028 ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
1030 dnode_special_close(&os->os_meta_dnode);
1031 if (DMU_USERUSED_DNODE(os)) {
1032 if (DMU_PROJECTUSED_DNODE(os))
1033 dnode_special_close(&os->os_projectused_dnode);
1034 dnode_special_close(&os->os_userused_dnode);
1035 dnode_special_close(&os->os_groupused_dnode);
1037 zil_free(os->os_zil);
1039 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
1042 * This is a barrier to prevent the objset from going away in
1043 * dnode_move() until we can safely ensure that the objset is still in
1044 * use. We consider the objset valid before the barrier and invalid
1045 * after the barrier.
1047 rw_enter(&os_lock, RW_READER);
1050 kmem_free(os->os_obj_next_percpu,
1051 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0]));
1053 mutex_destroy(&os->os_lock);
1054 mutex_destroy(&os->os_userused_lock);
1055 mutex_destroy(&os->os_obj_lock);
1056 mutex_destroy(&os->os_user_ptr_lock);
1057 mutex_destroy(&os->os_upgrade_lock);
1058 for (int i = 0; i < TXG_SIZE; i++)
1059 multilist_destroy(&os->os_dirty_dnodes[i]);
1060 spa_evicting_os_deregister(os->os_spa, os);
1061 kmem_free(os, sizeof (objset_t));
1065 dmu_objset_snap_cmtime(objset_t *os)
1067 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
1071 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1072 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx)
1077 ASSERT(dmu_tx_is_syncing(tx));
1080 blksz = DNODE_BLOCK_SIZE;
1082 ibs = DN_MAX_INDBLKSHIFT;
1085 VERIFY0(dmu_objset_from_ds(ds, &os));
1087 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
1089 mdn = DMU_META_DNODE(os);
1091 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0,
1092 DNODE_MIN_SLOTS, tx);
1095 * We don't want to have to increase the meta-dnode's nlevels
1096 * later, because then we could do it in quiescing context while
1097 * we are also accessing it in open context.
1099 * This precaution is not necessary for the MOS (ds == NULL),
1100 * because the MOS is only updated in syncing context.
1101 * This is most fortunate: the MOS is the only objset that
1102 * needs to be synced multiple times as spa_sync() iterates
1103 * to convergence, so minimizing its dn_nlevels matters.
1110 * Determine the number of levels necessary for the
1111 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note
1112 * that in order to ensure that we do not overflow
1113 * 64 bits, there has to be a nlevels that gives us a
1114 * number of blocks > DN_MAX_OBJECT but < 2^64.
1115 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)
1116 * (10) must be less than (64 - log2(DN_MAX_OBJECT))
1119 while ((uint64_t)mdn->dn_nblkptr <<
1120 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) *
1121 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
1126 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
1127 mdn->dn_nlevels = levels;
1130 ASSERT(type != DMU_OST_NONE);
1131 ASSERT(type != DMU_OST_ANY);
1132 ASSERT(type < DMU_OST_NUMTYPES);
1133 os->os_phys->os_type = type;
1136 * Enable user accounting if it is enabled and this is not an
1137 * encrypted receive.
1139 if (dmu_objset_userused_enabled(os) &&
1140 (!os->os_encrypted || !dmu_objset_is_receiving(os))) {
1141 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1142 if (dmu_objset_userobjused_enabled(os)) {
1143 ASSERT3P(ds, !=, NULL);
1144 ds->ds_feature_activation[
1145 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
1146 os->os_phys->os_flags |=
1147 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
1149 if (dmu_objset_projectquota_enabled(os)) {
1150 ASSERT3P(ds, !=, NULL);
1151 ds->ds_feature_activation[
1152 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
1153 os->os_phys->os_flags |=
1154 OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
1156 os->os_flags = os->os_phys->os_flags;
1159 dsl_dataset_dirty(ds, tx);
1164 /* called from dsl for meta-objset */
1166 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
1167 dmu_objset_type_t type, dmu_tx_t *tx)
1169 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx));
1172 typedef struct dmu_objset_create_arg {
1173 const char *doca_name;
1176 void (*doca_userfunc)(objset_t *os, void *arg,
1177 cred_t *cr, dmu_tx_t *tx);
1179 dmu_objset_type_t doca_type;
1180 uint64_t doca_flags;
1181 dsl_crypto_params_t *doca_dcp;
1182 } dmu_objset_create_arg_t;
1185 dmu_objset_create_check(void *arg, dmu_tx_t *tx)
1187 dmu_objset_create_arg_t *doca = arg;
1188 dsl_pool_t *dp = dmu_tx_pool(tx);
1190 dsl_dataset_t *parentds;
1195 if (strchr(doca->doca_name, '@') != NULL)
1196 return (SET_ERROR(EINVAL));
1198 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN)
1199 return (SET_ERROR(ENAMETOOLONG));
1201 if (dataset_nestcheck(doca->doca_name) != 0)
1202 return (SET_ERROR(ENAMETOOLONG));
1204 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
1208 dsl_dir_rele(pdd, FTAG);
1209 return (SET_ERROR(EEXIST));
1212 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL);
1214 dsl_dir_rele(pdd, FTAG);
1218 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1219 doca->doca_cred, doca->doca_proc);
1221 dsl_dir_rele(pdd, FTAG);
1225 /* can't create below anything but filesystems (eg. no ZVOLs) */
1226 error = dsl_dataset_hold_obj(pdd->dd_pool,
1227 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds);
1229 dsl_dir_rele(pdd, FTAG);
1232 error = dmu_objset_from_ds(parentds, &parentos);
1234 dsl_dataset_rele(parentds, FTAG);
1235 dsl_dir_rele(pdd, FTAG);
1238 if (dmu_objset_type(parentos) != DMU_OST_ZFS) {
1239 dsl_dataset_rele(parentds, FTAG);
1240 dsl_dir_rele(pdd, FTAG);
1241 return (SET_ERROR(ZFS_ERR_WRONG_PARENT));
1243 dsl_dataset_rele(parentds, FTAG);
1244 dsl_dir_rele(pdd, FTAG);
1250 dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
1252 dmu_objset_create_arg_t *doca = arg;
1253 dsl_pool_t *dp = dmu_tx_pool(tx);
1254 spa_t *spa = dp->dp_spa;
1263 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
1265 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
1266 doca->doca_cred, doca->doca_dcp, tx);
1268 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj,
1269 DS_HOLD_FLAG_DECRYPT, FTAG, &ds));
1270 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
1271 bp = dsl_dataset_get_blkptr(ds);
1272 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx);
1273 rrw_exit(&ds->ds_bp_rwlock, FTAG);
1275 if (doca->doca_userfunc != NULL) {
1276 doca->doca_userfunc(os, doca->doca_userarg,
1277 doca->doca_cred, tx);
1281 * The doca_userfunc() may write out some data that needs to be
1282 * encrypted if the dataset is encrypted (specifically the root
1283 * directory). This data must be written out before the encryption
1284 * key mapping is removed by dsl_dataset_rele_flags(). Force the
1285 * I/O to occur immediately by invoking the relevant sections of
1288 if (os->os_encrypted) {
1289 dsl_dataset_t *tmpds = NULL;
1290 boolean_t need_sync_done = B_FALSE;
1292 mutex_enter(&ds->ds_lock);
1293 ds->ds_owner = FTAG;
1294 mutex_exit(&ds->ds_lock);
1296 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1297 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1299 if (tmpds != NULL) {
1300 dsl_dataset_sync(ds, rzio, tx);
1301 need_sync_done = B_TRUE;
1303 VERIFY0(zio_wait(rzio));
1305 dmu_objset_sync_done(os, tx);
1306 taskq_wait(dp->dp_sync_taskq);
1307 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) {
1308 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1309 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1312 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
1313 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
1315 if (tmpds != NULL) {
1316 dmu_buf_rele(ds->ds_dbuf, ds);
1317 dsl_dataset_sync(ds, rzio, tx);
1319 VERIFY0(zio_wait(rzio));
1321 if (need_sync_done) {
1322 ASSERT3P(ds->ds_key_mapping, !=, NULL);
1323 key_mapping_rele(spa, ds->ds_key_mapping, ds);
1324 dsl_dataset_sync_done(ds, tx);
1325 dmu_buf_rele(ds->ds_dbuf, ds);
1328 mutex_enter(&ds->ds_lock);
1329 ds->ds_owner = NULL;
1330 mutex_exit(&ds->ds_lock);
1333 spa_history_log_internal_ds(ds, "create", tx, " ");
1335 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG);
1336 dsl_dir_rele(pdd, FTAG);
1340 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
1341 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg)
1343 dmu_objset_create_arg_t doca;
1344 dsl_crypto_params_t tmp_dcp = { 0 };
1346 doca.doca_name = name;
1347 doca.doca_cred = CRED();
1348 doca.doca_proc = curproc;
1349 doca.doca_flags = flags;
1350 doca.doca_userfunc = func;
1351 doca.doca_userarg = arg;
1352 doca.doca_type = type;
1355 * Some callers (mostly for testing) do not provide a dcp on their
1356 * own but various code inside the sync task will require it to be
1357 * allocated. Rather than adding NULL checks throughout this code
1358 * or adding dummy dcp's to all of the callers we simply create a
1359 * dummy one here and use that. This zero dcp will have the same
1360 * effect as asking for inheritance of all encryption params.
1362 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp;
1364 int rv = dsl_sync_task(name,
1365 dmu_objset_create_check, dmu_objset_create_sync, &doca,
1366 6, ZFS_SPACE_CHECK_NORMAL);
1369 zvol_create_minor(name);
1373 typedef struct dmu_objset_clone_arg {
1374 const char *doca_clone;
1375 const char *doca_origin;
1378 } dmu_objset_clone_arg_t;
1381 dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
1383 dmu_objset_clone_arg_t *doca = arg;
1387 dsl_dataset_t *origin;
1388 dsl_pool_t *dp = dmu_tx_pool(tx);
1390 if (strchr(doca->doca_clone, '@') != NULL)
1391 return (SET_ERROR(EINVAL));
1393 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN)
1394 return (SET_ERROR(ENAMETOOLONG));
1396 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
1400 dsl_dir_rele(pdd, FTAG);
1401 return (SET_ERROR(EEXIST));
1404 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
1405 doca->doca_cred, doca->doca_proc);
1407 dsl_dir_rele(pdd, FTAG);
1408 return (SET_ERROR(EDQUOT));
1411 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
1413 dsl_dir_rele(pdd, FTAG);
1417 /* You can only clone snapshots, not the head datasets. */
1418 if (!origin->ds_is_snapshot) {
1419 dsl_dataset_rele(origin, FTAG);
1420 dsl_dir_rele(pdd, FTAG);
1421 return (SET_ERROR(EINVAL));
1424 dsl_dataset_rele(origin, FTAG);
1425 dsl_dir_rele(pdd, FTAG);
1431 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
1433 dmu_objset_clone_arg_t *doca = arg;
1434 dsl_pool_t *dp = dmu_tx_pool(tx);
1437 dsl_dataset_t *origin, *ds;
1439 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
1441 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
1442 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
1444 obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
1445 doca->doca_cred, NULL, tx);
1447 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
1448 dsl_dataset_name(origin, namebuf);
1449 spa_history_log_internal_ds(ds, "clone", tx,
1450 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object);
1451 dsl_dataset_rele(ds, FTAG);
1452 dsl_dataset_rele(origin, FTAG);
1453 dsl_dir_rele(pdd, FTAG);
1457 dmu_objset_clone(const char *clone, const char *origin)
1459 dmu_objset_clone_arg_t doca;
1461 doca.doca_clone = clone;
1462 doca.doca_origin = origin;
1463 doca.doca_cred = CRED();
1464 doca.doca_proc = curproc;
1466 int rv = dsl_sync_task(clone,
1467 dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
1468 6, ZFS_SPACE_CHECK_NORMAL);
1471 zvol_create_minor(clone);
1477 dmu_objset_snapshot_one(const char *fsname, const char *snapname)
1480 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
1481 nvlist_t *snaps = fnvlist_alloc();
1483 fnvlist_add_boolean(snaps, longsnap);
1484 kmem_strfree(longsnap);
1485 err = dsl_dataset_snapshot(snaps, NULL, NULL);
1486 fnvlist_free(snaps);
1491 dmu_objset_upgrade_task_cb(void *data)
1493 objset_t *os = data;
1495 mutex_enter(&os->os_upgrade_lock);
1496 os->os_upgrade_status = EINTR;
1497 if (!os->os_upgrade_exit) {
1500 mutex_exit(&os->os_upgrade_lock);
1502 status = os->os_upgrade_cb(os);
1504 mutex_enter(&os->os_upgrade_lock);
1506 os->os_upgrade_status = status;
1508 os->os_upgrade_exit = B_TRUE;
1509 os->os_upgrade_id = 0;
1510 mutex_exit(&os->os_upgrade_lock);
1511 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1515 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb)
1517 if (os->os_upgrade_id != 0)
1520 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
1521 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag);
1523 mutex_enter(&os->os_upgrade_lock);
1524 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) {
1525 os->os_upgrade_exit = B_FALSE;
1526 os->os_upgrade_cb = cb;
1527 os->os_upgrade_id = taskq_dispatch(
1528 os->os_spa->spa_upgrade_taskq,
1529 dmu_objset_upgrade_task_cb, os, TQ_SLEEP);
1530 if (os->os_upgrade_id == TASKQID_INVALID) {
1531 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1532 os->os_upgrade_status = ENOMEM;
1535 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1537 mutex_exit(&os->os_upgrade_lock);
1541 dmu_objset_upgrade_stop(objset_t *os)
1543 mutex_enter(&os->os_upgrade_lock);
1544 os->os_upgrade_exit = B_TRUE;
1545 if (os->os_upgrade_id != 0) {
1546 taskqid_t id = os->os_upgrade_id;
1548 os->os_upgrade_id = 0;
1549 mutex_exit(&os->os_upgrade_lock);
1551 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) {
1552 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
1554 txg_wait_synced(os->os_spa->spa_dsl_pool, 0);
1556 mutex_exit(&os->os_upgrade_lock);
1561 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx)
1565 while ((dn = multilist_sublist_head(list)) != NULL) {
1566 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
1567 ASSERT(dn->dn_dbuf->db_data_pending);
1569 * Initialize dn_zio outside dnode_sync() because the
1570 * meta-dnode needs to set it outside dnode_sync().
1572 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
1575 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
1576 multilist_sublist_remove(list, dn);
1579 * See the comment above dnode_rele_task() for an explanation
1580 * of why this dnode hold is always needed (even when not
1581 * doing user accounting).
1583 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes;
1584 (void) dnode_add_ref(dn, newlist);
1585 multilist_insert(newlist, dn);
1592 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
1595 blkptr_t *bp = zio->io_bp;
1597 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
1600 ASSERT(!BP_IS_EMBEDDED(bp));
1601 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
1602 ASSERT0(BP_GET_LEVEL(bp));
1605 * Update rootbp fill count: it should be the number of objects
1606 * allocated in the object set (not counting the "special"
1607 * objects that are stored in the objset_phys_t -- the meta
1608 * dnode and user/group/project accounting objects).
1610 for (int i = 0; i < dnp->dn_nblkptr; i++)
1611 fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
1613 BP_SET_FILL(bp, fill);
1615 if (os->os_dsl_dataset != NULL)
1616 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG);
1617 *os->os_rootbp = *bp;
1618 if (os->os_dsl_dataset != NULL)
1619 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG);
1623 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
1626 blkptr_t *bp = zio->io_bp;
1627 blkptr_t *bp_orig = &zio->io_bp_orig;
1630 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
1631 ASSERT(BP_EQUAL(bp, bp_orig));
1633 dsl_dataset_t *ds = os->os_dsl_dataset;
1634 dmu_tx_t *tx = os->os_synctx;
1636 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
1637 dsl_dataset_block_born(ds, bp, tx);
1639 kmem_free(bp, sizeof (*bp));
1642 typedef struct sync_objset_arg {
1648 taskq_ent_t soa_tq_ent;
1649 } sync_objset_arg_t;
1651 typedef struct sync_dnodes_arg {
1652 multilist_t *sda_list;
1653 int sda_sublist_idx;
1654 multilist_t *sda_newlist;
1655 sync_objset_arg_t *sda_soa;
1656 } sync_dnodes_arg_t;
1658 static void sync_meta_dnode_task(void *arg);
1661 sync_dnodes_task(void *arg)
1663 sync_dnodes_arg_t *sda = arg;
1664 sync_objset_arg_t *soa = sda->sda_soa;
1665 objset_t *os = soa->soa_os;
1667 multilist_sublist_t *ms =
1668 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx);
1670 dmu_objset_sync_dnodes(ms, soa->soa_tx);
1672 multilist_sublist_unlock(ms);
1674 kmem_free(sda, sizeof (*sda));
1676 mutex_enter(&soa->soa_mutex);
1677 ASSERT(soa->soa_count != 0);
1678 if (--soa->soa_count != 0) {
1679 mutex_exit(&soa->soa_mutex);
1682 mutex_exit(&soa->soa_mutex);
1684 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq,
1685 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent);
1689 * Issue the zio_nowait() for all dirty record zios on the meta dnode,
1690 * then trigger the callback for the zil_sync. This runs once for each
1691 * objset, only after any/all sublists in the objset have been synced.
1694 sync_meta_dnode_task(void *arg)
1696 sync_objset_arg_t *soa = arg;
1697 objset_t *os = soa->soa_os;
1698 dmu_tx_t *tx = soa->soa_tx;
1699 int txgoff = tx->tx_txg & TXG_MASK;
1700 dbuf_dirty_record_t *dr;
1702 ASSERT0(soa->soa_count);
1704 list_t *list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
1705 while ((dr = list_remove_head(list)) != NULL) {
1706 ASSERT0(dr->dr_dbuf->db_level);
1707 zio_nowait(dr->dr_zio);
1710 /* Enable dnode backfill if enough objects have been freed. */
1711 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) {
1712 os->os_rescan_dnodes = B_TRUE;
1713 os->os_freed_dnodes = 0;
1717 * Free intent log blocks up to this tx.
1719 zil_sync(os->os_zil, tx);
1720 os->os_phys->os_zil_header = os->os_zil_header;
1721 zio_nowait(soa->soa_zio);
1723 mutex_destroy(&soa->soa_mutex);
1724 kmem_free(soa, sizeof (*soa));
1727 /* called from dsl */
1729 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
1732 zbookmark_phys_t zb;
1737 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP);
1738 *blkptr_copy = *os->os_rootbp;
1740 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg);
1742 ASSERT(dmu_tx_is_syncing(tx));
1743 /* XXX the write_done callback should really give us the tx... */
1746 if (os->os_dsl_dataset == NULL) {
1748 * This is the MOS. If we have upgraded,
1749 * spa_max_replication() could change, so reset
1752 os->os_copies = spa_max_replication(os->os_spa);
1756 * Create the root block IO
1758 SET_BOOKMARK(&zb, os->os_dsl_dataset ?
1759 os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
1760 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
1761 arc_release(os->os_phys_buf, &os->os_phys_buf);
1763 dmu_write_policy(os, NULL, 0, 0, &zp);
1766 * If we are either claiming the ZIL or doing a raw receive, write
1767 * out the os_phys_buf raw. Neither of these actions will effect the
1768 * MAC at this point.
1770 if (os->os_raw_receive ||
1771 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) {
1772 ASSERT(os->os_encrypted);
1773 arc_convert_to_raw(os->os_phys_buf,
1774 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER,
1775 DMU_OT_OBJSET, NULL, NULL, NULL);
1778 zio = arc_write(pio, os->os_spa, tx->tx_txg,
1779 blkptr_copy, os->os_phys_buf, B_FALSE, dmu_os_is_l2cacheable(os),
1780 &zp, dmu_objset_write_ready, NULL, dmu_objset_write_done,
1781 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
1784 * Sync special dnodes - the parent IO for the sync is the root block
1786 DMU_META_DNODE(os)->dn_zio = zio;
1787 dnode_sync(DMU_META_DNODE(os), tx);
1789 os->os_phys->os_flags = os->os_flags;
1791 if (DMU_USERUSED_DNODE(os) &&
1792 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1793 DMU_USERUSED_DNODE(os)->dn_zio = zio;
1794 dnode_sync(DMU_USERUSED_DNODE(os), tx);
1795 DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
1796 dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
1799 if (DMU_PROJECTUSED_DNODE(os) &&
1800 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1801 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio;
1802 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx);
1805 txgoff = tx->tx_txg & TXG_MASK;
1808 * We must create the list here because it uses the
1809 * dn_dirty_link[] of this txg. But it may already
1810 * exist because we call dsl_dataset_sync() twice per txg.
1812 if (os->os_synced_dnodes.ml_sublists == NULL) {
1813 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t),
1814 offsetof(dnode_t, dn_dirty_link[txgoff]),
1815 dnode_multilist_index_func);
1817 ASSERT3U(os->os_synced_dnodes.ml_offset, ==,
1818 offsetof(dnode_t, dn_dirty_link[txgoff]));
1822 * zio_nowait(zio) is done after any/all sublist and meta dnode
1823 * zios have been nowaited, and the zil_sync() has been performed.
1824 * The soa is freed at the end of sync_meta_dnode_task.
1826 sync_objset_arg_t *soa = kmem_alloc(sizeof (*soa), KM_SLEEP);
1830 taskq_init_ent(&soa->soa_tq_ent);
1831 mutex_init(&soa->soa_mutex, NULL, MUTEX_DEFAULT, NULL);
1833 ml = &os->os_dirty_dnodes[txgoff];
1834 soa->soa_count = num_sublists = multilist_get_num_sublists(ml);
1836 for (int i = 0; i < num_sublists; i++) {
1837 if (multilist_sublist_is_empty_idx(ml, i))
1841 if (soa->soa_count == 0) {
1842 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq,
1843 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent);
1846 * Sync sublists in parallel. The last to finish
1847 * (i.e., when soa->soa_count reaches zero) must
1848 * dispatch sync_meta_dnode_task.
1850 for (int i = 0; i < num_sublists; i++) {
1851 if (multilist_sublist_is_empty_idx(ml, i))
1853 sync_dnodes_arg_t *sda =
1854 kmem_alloc(sizeof (*sda), KM_SLEEP);
1856 sda->sda_sublist_idx = i;
1858 (void) taskq_dispatch(
1859 dmu_objset_pool(os)->dp_sync_taskq,
1860 sync_dnodes_task, sda, 0);
1861 /* sync_dnodes_task frees sda */
1867 dmu_objset_is_dirty(objset_t *os, uint64_t txg)
1869 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]));
1872 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES];
1875 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb)
1881 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data,
1882 zfs_file_info_t *zfi)
1884 file_info_cb_t *cb = file_cbs[os->os_phys->os_type];
1887 return (cb(bonustype, data, zfi));
1891 dmu_objset_userused_enabled(objset_t *os)
1893 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1894 file_cbs[os->os_phys->os_type] != NULL &&
1895 DMU_USERUSED_DNODE(os) != NULL);
1899 dmu_objset_userobjused_enabled(objset_t *os)
1901 return (dmu_objset_userused_enabled(os) &&
1902 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING));
1906 dmu_objset_projectquota_enabled(objset_t *os)
1908 return (file_cbs[os->os_phys->os_type] != NULL &&
1909 DMU_PROJECTUSED_DNODE(os) != NULL &&
1910 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA));
1913 typedef struct userquota_node {
1914 /* must be in the first filed, see userquota_update_cache() */
1915 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN];
1917 avl_node_t uqn_node;
1920 typedef struct userquota_cache {
1921 avl_tree_t uqc_user_deltas;
1922 avl_tree_t uqc_group_deltas;
1923 avl_tree_t uqc_project_deltas;
1924 } userquota_cache_t;
1927 userquota_compare(const void *l, const void *r)
1929 const userquota_node_t *luqn = l;
1930 const userquota_node_t *ruqn = r;
1934 * NB: can only access uqn_id because userquota_update_cache() doesn't
1935 * pass in an entire userquota_node_t.
1937 rv = strcmp(luqn->uqn_id, ruqn->uqn_id);
1939 return (TREE_ISIGN(rv));
1943 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx)
1946 userquota_node_t *uqn;
1948 ASSERT(dmu_tx_is_syncing(tx));
1951 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas,
1952 &cookie)) != NULL) {
1954 * os_userused_lock protects against concurrent calls to
1955 * zap_increment_int(). It's needed because zap_increment_int()
1956 * is not thread-safe (i.e. not atomic).
1958 mutex_enter(&os->os_userused_lock);
1959 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT,
1960 uqn->uqn_id, uqn->uqn_delta, tx));
1961 mutex_exit(&os->os_userused_lock);
1962 kmem_free(uqn, sizeof (*uqn));
1964 avl_destroy(&cache->uqc_user_deltas);
1967 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas,
1968 &cookie)) != NULL) {
1969 mutex_enter(&os->os_userused_lock);
1970 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT,
1971 uqn->uqn_id, uqn->uqn_delta, tx));
1972 mutex_exit(&os->os_userused_lock);
1973 kmem_free(uqn, sizeof (*uqn));
1975 avl_destroy(&cache->uqc_group_deltas);
1977 if (dmu_objset_projectquota_enabled(os)) {
1979 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas,
1980 &cookie)) != NULL) {
1981 mutex_enter(&os->os_userused_lock);
1982 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT,
1983 uqn->uqn_id, uqn->uqn_delta, tx));
1984 mutex_exit(&os->os_userused_lock);
1985 kmem_free(uqn, sizeof (*uqn));
1987 avl_destroy(&cache->uqc_project_deltas);
1992 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta)
1994 userquota_node_t *uqn;
1997 ASSERT(strlen(id) < sizeof (uqn->uqn_id));
1999 * Use id directly for searching because uqn_id is the first field of
2000 * userquota_node_t and fields after uqn_id won't be accessed in
2003 uqn = avl_find(avl, (const void *)id, &idx);
2005 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP);
2006 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id));
2007 avl_insert(avl, uqn, idx);
2009 uqn->uqn_delta += delta;
2013 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used,
2014 uint64_t flags, uint64_t user, uint64_t group, uint64_t project,
2017 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) {
2018 int64_t delta = DNODE_MIN_SIZE + used;
2024 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user);
2025 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
2027 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group);
2028 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
2030 if (dmu_objset_projectquota_enabled(os)) {
2031 (void) snprintf(name, sizeof (name), "%llx",
2032 (longlong_t)project);
2033 userquota_update_cache(&cache->uqc_project_deltas,
2040 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags,
2041 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract)
2043 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) {
2044 char name[20 + DMU_OBJACCT_PREFIX_LEN];
2045 int delta = subtract ? -1 : 1;
2047 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
2049 userquota_update_cache(&cache->uqc_user_deltas, name, delta);
2051 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
2053 userquota_update_cache(&cache->uqc_group_deltas, name, delta);
2055 if (dmu_objset_projectquota_enabled(os)) {
2056 (void) snprintf(name, sizeof (name),
2057 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project);
2058 userquota_update_cache(&cache->uqc_project_deltas,
2064 typedef struct userquota_updates_arg {
2066 int uua_sublist_idx;
2068 } userquota_updates_arg_t;
2071 userquota_updates_task(void *arg)
2073 userquota_updates_arg_t *uua = arg;
2074 objset_t *os = uua->uua_os;
2075 dmu_tx_t *tx = uua->uua_tx;
2077 userquota_cache_t cache = { { 0 } };
2079 multilist_sublist_t *list =
2080 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
2082 ASSERT(multilist_sublist_head(list) == NULL ||
2083 dmu_objset_userused_enabled(os));
2084 avl_create(&cache.uqc_user_deltas, userquota_compare,
2085 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
2086 avl_create(&cache.uqc_group_deltas, userquota_compare,
2087 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
2088 if (dmu_objset_projectquota_enabled(os))
2089 avl_create(&cache.uqc_project_deltas, userquota_compare,
2090 sizeof (userquota_node_t), offsetof(userquota_node_t,
2093 while ((dn = multilist_sublist_head(list)) != NULL) {
2095 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
2096 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
2097 dn->dn_phys->dn_flags &
2098 DNODE_FLAG_USERUSED_ACCOUNTED);
2100 flags = dn->dn_id_flags;
2102 if (flags & DN_ID_OLD_EXIST) {
2103 do_userquota_update(os, &cache, dn->dn_oldused,
2104 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid,
2105 dn->dn_oldprojid, B_TRUE);
2106 do_userobjquota_update(os, &cache, dn->dn_oldflags,
2107 dn->dn_olduid, dn->dn_oldgid,
2108 dn->dn_oldprojid, B_TRUE);
2110 if (flags & DN_ID_NEW_EXIST) {
2111 do_userquota_update(os, &cache,
2112 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags,
2113 dn->dn_newuid, dn->dn_newgid,
2114 dn->dn_newprojid, B_FALSE);
2115 do_userobjquota_update(os, &cache,
2116 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid,
2117 dn->dn_newprojid, B_FALSE);
2120 mutex_enter(&dn->dn_mtx);
2122 dn->dn_oldflags = 0;
2123 if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
2124 dn->dn_olduid = dn->dn_newuid;
2125 dn->dn_oldgid = dn->dn_newgid;
2126 dn->dn_oldprojid = dn->dn_newprojid;
2127 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2128 if (dn->dn_bonuslen == 0)
2129 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2131 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2133 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
2134 mutex_exit(&dn->dn_mtx);
2136 multilist_sublist_remove(list, dn);
2137 dnode_rele(dn, &os->os_synced_dnodes);
2139 do_userquota_cacheflush(os, &cache, tx);
2140 multilist_sublist_unlock(list);
2141 kmem_free(uua, sizeof (*uua));
2145 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being
2146 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be
2147 * evicted because the block containing the dnode can't be evicted until it is
2148 * written out. However, this hold is necessary to prevent the dnode_t from
2149 * being moved (via dnode_move()) while it's still referenced by
2150 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for
2151 * dirty_lightweight_leaf-type dirty records.
2153 * If we are doing user-object accounting, the dnode_rele() happens from
2154 * userquota_updates_task() instead.
2157 dnode_rele_task(void *arg)
2159 userquota_updates_arg_t *uua = arg;
2160 objset_t *os = uua->uua_os;
2162 multilist_sublist_t *list =
2163 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx);
2166 while ((dn = multilist_sublist_head(list)) != NULL) {
2167 multilist_sublist_remove(list, dn);
2168 dnode_rele(dn, &os->os_synced_dnodes);
2170 multilist_sublist_unlock(list);
2171 kmem_free(uua, sizeof (*uua));
2175 * Return TRUE if userquota updates are needed.
2178 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx)
2180 if (!dmu_objset_userused_enabled(os))
2184 * If this is a raw receive just return and handle accounting
2185 * later when we have the keys loaded. We also don't do user
2186 * accounting during claiming since the datasets are not owned
2187 * for the duration of claiming and this txg should only be
2188 * used for recovery.
2190 if (os->os_encrypted && dmu_objset_is_receiving(os))
2193 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg)
2196 /* Allocate the user/group/project used objects if necessary. */
2197 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2198 VERIFY0(zap_create_claim(os,
2199 DMU_USERUSED_OBJECT,
2200 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2201 VERIFY0(zap_create_claim(os,
2202 DMU_GROUPUSED_OBJECT,
2203 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2206 if (dmu_objset_projectquota_enabled(os) &&
2207 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
2208 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT,
2209 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
2215 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and
2216 * also release the holds on the dnodes from dmu_objset_sync_dnodes().
2217 * The caller must taskq_wait(dp_sync_taskq).
2220 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx)
2222 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx);
2224 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes);
2225 for (int i = 0; i < num_sublists; i++) {
2226 userquota_updates_arg_t *uua =
2227 kmem_alloc(sizeof (*uua), KM_SLEEP);
2229 uua->uua_sublist_idx = i;
2233 * If we don't need to update userquotas, use
2234 * dnode_rele_task() to call dnode_rele()
2236 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
2237 need_userquota ? userquota_updates_task : dnode_rele_task,
2239 /* callback frees uua */
2245 * Returns a pointer to data to find uid/gid from
2247 * If a dirty record for transaction group that is syncing can't
2248 * be found then NULL is returned. In the NULL case it is assumed
2249 * the uid/gid aren't changing.
2252 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
2254 dbuf_dirty_record_t *dr;
2257 if (db->db_dirtycnt == 0)
2258 return (db->db.db_data); /* Nothing is changing */
2260 dr = dbuf_find_dirty_eq(db, tx->tx_txg);
2265 if (dr->dr_dnode->dn_bonuslen == 0 &&
2266 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
2267 data = dr->dt.dl.dr_data->b_data;
2269 data = dr->dt.dl.dr_data;
2276 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
2278 objset_t *os = dn->dn_objset;
2280 dmu_buf_impl_t *db = NULL;
2281 int flags = dn->dn_id_flags;
2283 boolean_t have_spill = B_FALSE;
2285 if (!dmu_objset_userused_enabled(dn->dn_objset))
2289 * Raw receives introduce a problem with user accounting. Raw
2290 * receives cannot update the user accounting info because the
2291 * user ids and the sizes are encrypted. To guarantee that we
2292 * never end up with bad user accounting, we simply disable it
2293 * during raw receives. We also disable this for normal receives
2294 * so that an incremental raw receive may be done on top of an
2295 * existing non-raw receive.
2297 if (os->os_encrypted && dmu_objset_is_receiving(os))
2300 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
2301 DN_ID_CHKED_SPILL)))
2304 if (before && dn->dn_bonuslen != 0)
2305 data = DN_BONUS(dn->dn_phys);
2306 else if (!before && dn->dn_bonuslen != 0) {
2309 mutex_enter(&db->db_mtx);
2310 data = dmu_objset_userquota_find_data(db, tx);
2312 data = DN_BONUS(dn->dn_phys);
2314 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
2317 if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
2318 rf |= DB_RF_HAVESTRUCT;
2319 error = dmu_spill_hold_by_dnode(dn,
2320 rf | DB_RF_MUST_SUCCEED,
2321 FTAG, (dmu_buf_t **)&db);
2323 mutex_enter(&db->db_mtx);
2324 data = (before) ? db->db.db_data :
2325 dmu_objset_userquota_find_data(db, tx);
2326 have_spill = B_TRUE;
2328 mutex_enter(&dn->dn_mtx);
2329 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2330 mutex_exit(&dn->dn_mtx);
2335 * Must always call the callback in case the object
2336 * type has changed and that type isn't an object type to track
2338 zfs_file_info_t zfi;
2339 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi);
2343 dn->dn_olduid = zfi.zfi_user;
2344 dn->dn_oldgid = zfi.zfi_group;
2345 dn->dn_oldprojid = zfi.zfi_project;
2347 dn->dn_newuid = zfi.zfi_user;
2348 dn->dn_newgid = zfi.zfi_group;
2349 dn->dn_newprojid = zfi.zfi_project;
2353 * Preserve existing uid/gid when the callback can't determine
2354 * what the new uid/gid are and the callback returned EEXIST.
2355 * The EEXIST error tells us to just use the existing uid/gid.
2356 * If we don't know what the old values are then just assign
2357 * them to 0, since that is a new file being created.
2359 if (!before && data == NULL && error == EEXIST) {
2360 if (flags & DN_ID_OLD_EXIST) {
2361 dn->dn_newuid = dn->dn_olduid;
2362 dn->dn_newgid = dn->dn_oldgid;
2363 dn->dn_newprojid = dn->dn_oldprojid;
2367 dn->dn_newprojid = ZFS_DEFAULT_PROJID;
2373 mutex_exit(&db->db_mtx);
2375 mutex_enter(&dn->dn_mtx);
2376 if (error == 0 && before)
2377 dn->dn_id_flags |= DN_ID_OLD_EXIST;
2378 if (error == 0 && !before)
2379 dn->dn_id_flags |= DN_ID_NEW_EXIST;
2382 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
2384 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
2386 mutex_exit(&dn->dn_mtx);
2388 dmu_buf_rele((dmu_buf_t *)db, FTAG);
2392 dmu_objset_userspace_present(objset_t *os)
2394 return (os->os_phys->os_flags &
2395 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
2399 dmu_objset_userobjspace_present(objset_t *os)
2401 return (os->os_phys->os_flags &
2402 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE);
2406 dmu_objset_projectquota_present(objset_t *os)
2408 return (os->os_phys->os_flags &
2409 OBJSET_FLAG_PROJECTQUOTA_COMPLETE);
2413 dmu_objset_space_upgrade(objset_t *os)
2419 * We simply need to mark every object dirty, so that it will be
2420 * synced out and now accounted. If this is called
2421 * concurrently, or if we already did some work before crashing,
2422 * that's fine, since we track each object's accounted state
2426 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
2431 mutex_enter(&os->os_upgrade_lock);
2432 if (os->os_upgrade_exit)
2433 err = SET_ERROR(EINTR);
2434 mutex_exit(&os->os_upgrade_lock);
2438 if (issig(JUSTLOOKING) && issig(FORREAL))
2439 return (SET_ERROR(EINTR));
2441 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
2444 tx = dmu_tx_create(os);
2445 dmu_tx_hold_bonus(tx, obj);
2446 objerr = dmu_tx_assign(tx, TXG_WAIT);
2448 dmu_buf_rele(db, FTAG);
2452 dmu_buf_will_dirty(db, tx);
2453 dmu_buf_rele(db, FTAG);
2460 dmu_objset_userspace_upgrade_cb(objset_t *os)
2464 if (dmu_objset_userspace_present(os))
2466 if (dmu_objset_is_snapshot(os))
2467 return (SET_ERROR(EINVAL));
2468 if (!dmu_objset_userused_enabled(os))
2469 return (SET_ERROR(ENOTSUP));
2471 err = dmu_objset_space_upgrade(os);
2475 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2476 txg_wait_synced(dmu_objset_pool(os), 0);
2481 dmu_objset_userspace_upgrade(objset_t *os)
2483 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb);
2487 dmu_objset_id_quota_upgrade_cb(objset_t *os)
2491 if (dmu_objset_userobjspace_present(os) &&
2492 dmu_objset_projectquota_present(os))
2494 if (dmu_objset_is_snapshot(os))
2495 return (SET_ERROR(EINVAL));
2496 if (!dmu_objset_userused_enabled(os))
2497 return (SET_ERROR(ENOTSUP));
2498 if (!dmu_objset_projectquota_enabled(os) &&
2499 dmu_objset_userobjspace_present(os))
2500 return (SET_ERROR(ENOTSUP));
2502 if (dmu_objset_userobjused_enabled(os))
2503 dmu_objset_ds(os)->ds_feature_activation[
2504 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE;
2505 if (dmu_objset_projectquota_enabled(os))
2506 dmu_objset_ds(os)->ds_feature_activation[
2507 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE;
2509 err = dmu_objset_space_upgrade(os);
2513 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
2514 if (dmu_objset_userobjused_enabled(os))
2515 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
2516 if (dmu_objset_projectquota_enabled(os))
2517 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE;
2519 txg_wait_synced(dmu_objset_pool(os), 0);
2524 dmu_objset_id_quota_upgrade(objset_t *os)
2526 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb);
2530 dmu_objset_userobjspace_upgradable(objset_t *os)
2532 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2533 !dmu_objset_is_snapshot(os) &&
2534 dmu_objset_userobjused_enabled(os) &&
2535 !dmu_objset_userobjspace_present(os) &&
2536 spa_writeable(dmu_objset_spa(os)));
2540 dmu_objset_projectquota_upgradable(objset_t *os)
2542 return (dmu_objset_type(os) == DMU_OST_ZFS &&
2543 !dmu_objset_is_snapshot(os) &&
2544 dmu_objset_projectquota_enabled(os) &&
2545 !dmu_objset_projectquota_present(os) &&
2546 spa_writeable(dmu_objset_spa(os)));
2550 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
2551 uint64_t *usedobjsp, uint64_t *availobjsp)
2553 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
2554 usedobjsp, availobjsp);
2558 dmu_objset_fsid_guid(objset_t *os)
2560 return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
2564 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
2566 stat->dds_type = os->os_phys->os_type;
2567 if (os->os_dsl_dataset)
2568 dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
2572 dmu_objset_stats(objset_t *os, nvlist_t *nv)
2574 ASSERT(os->os_dsl_dataset ||
2575 os->os_phys->os_type == DMU_OST_META);
2577 if (os->os_dsl_dataset != NULL)
2578 dsl_dataset_stats(os->os_dsl_dataset, nv);
2580 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
2581 os->os_phys->os_type);
2582 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
2583 dmu_objset_userspace_present(os));
2587 dmu_objset_is_snapshot(objset_t *os)
2589 if (os->os_dsl_dataset != NULL)
2590 return (os->os_dsl_dataset->ds_is_snapshot);
2596 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen,
2597 boolean_t *conflict)
2599 dsl_dataset_t *ds = os->os_dsl_dataset;
2602 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2603 return (SET_ERROR(ENOENT));
2605 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
2606 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored,
2607 MT_NORMALIZE, real, maxlen, conflict));
2611 dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
2612 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
2614 dsl_dataset_t *ds = os->os_dsl_dataset;
2615 zap_cursor_t cursor;
2616 zap_attribute_t attr;
2618 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
2620 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
2621 return (SET_ERROR(ENOENT));
2623 zap_cursor_init_serialized(&cursor,
2624 ds->ds_dir->dd_pool->dp_meta_objset,
2625 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp);
2627 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2628 zap_cursor_fini(&cursor);
2629 return (SET_ERROR(ENOENT));
2632 if (strlen(attr.za_name) + 1 > namelen) {
2633 zap_cursor_fini(&cursor);
2634 return (SET_ERROR(ENAMETOOLONG));
2637 (void) strlcpy(name, attr.za_name, namelen);
2639 *idp = attr.za_first_integer;
2641 *case_conflict = attr.za_normalization_conflict;
2642 zap_cursor_advance(&cursor);
2643 *offp = zap_cursor_serialize(&cursor);
2644 zap_cursor_fini(&cursor);
2650 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value)
2652 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value));
2656 dmu_dir_list_next(objset_t *os, int namelen, char *name,
2657 uint64_t *idp, uint64_t *offp)
2659 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
2660 zap_cursor_t cursor;
2661 zap_attribute_t attr;
2663 /* there is no next dir on a snapshot! */
2664 if (os->os_dsl_dataset->ds_object !=
2665 dsl_dir_phys(dd)->dd_head_dataset_obj)
2666 return (SET_ERROR(ENOENT));
2668 zap_cursor_init_serialized(&cursor,
2669 dd->dd_pool->dp_meta_objset,
2670 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp);
2672 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
2673 zap_cursor_fini(&cursor);
2674 return (SET_ERROR(ENOENT));
2677 if (strlen(attr.za_name) + 1 > namelen) {
2678 zap_cursor_fini(&cursor);
2679 return (SET_ERROR(ENAMETOOLONG));
2682 (void) strlcpy(name, attr.za_name, namelen);
2684 *idp = attr.za_first_integer;
2685 zap_cursor_advance(&cursor);
2686 *offp = zap_cursor_serialize(&cursor);
2687 zap_cursor_fini(&cursor);
2692 typedef struct dmu_objset_find_ctx {
2696 char *dc_ddname; /* last component of ddobj's name */
2697 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *);
2700 kmutex_t *dc_error_lock;
2702 } dmu_objset_find_ctx_t;
2705 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp)
2707 dsl_pool_t *dp = dcp->dc_dp;
2711 zap_attribute_t *attr;
2715 /* don't process if there already was an error */
2716 if (*dcp->dc_error != 0)
2720 * Note: passing the name (dc_ddname) here is optional, but it
2721 * improves performance because we don't need to call
2722 * zap_value_search() to determine the name.
2724 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd);
2728 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2729 if (dd->dd_myname[0] == '$') {
2730 dsl_dir_rele(dd, FTAG);
2734 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2735 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2738 * Iterate over all children.
2740 if (dcp->dc_flags & DS_FIND_CHILDREN) {
2741 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2742 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2743 zap_cursor_retrieve(&zc, attr) == 0;
2744 (void) zap_cursor_advance(&zc)) {
2745 ASSERT3U(attr->za_integer_length, ==,
2747 ASSERT3U(attr->za_num_integers, ==, 1);
2749 dmu_objset_find_ctx_t *child_dcp =
2750 kmem_alloc(sizeof (*child_dcp), KM_SLEEP);
2752 child_dcp->dc_ddobj = attr->za_first_integer;
2753 child_dcp->dc_ddname = spa_strdup(attr->za_name);
2754 if (dcp->dc_tq != NULL)
2755 (void) taskq_dispatch(dcp->dc_tq,
2756 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP);
2758 dmu_objset_find_dp_impl(child_dcp);
2760 zap_cursor_fini(&zc);
2764 * Iterate over all snapshots.
2766 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) {
2768 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2773 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
2774 dsl_dataset_rele(ds, FTAG);
2776 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
2777 zap_cursor_retrieve(&zc, attr) == 0;
2778 (void) zap_cursor_advance(&zc)) {
2779 ASSERT3U(attr->za_integer_length, ==,
2781 ASSERT3U(attr->za_num_integers, ==, 1);
2783 err = dsl_dataset_hold_obj(dp,
2784 attr->za_first_integer, FTAG, &ds);
2787 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2788 dsl_dataset_rele(ds, FTAG);
2792 zap_cursor_fini(&zc);
2796 kmem_free(attr, sizeof (zap_attribute_t));
2799 dsl_dir_rele(dd, FTAG);
2806 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
2809 * Note: we hold the dir while calling dsl_dataset_hold_obj() so
2810 * that the dir will remain cached, and we won't have to re-instantiate
2811 * it (which could be expensive due to finding its name via
2812 * zap_value_search()).
2814 dsl_dir_rele(dd, FTAG);
2817 err = dcp->dc_func(dp, ds, dcp->dc_arg);
2818 dsl_dataset_rele(ds, FTAG);
2822 mutex_enter(dcp->dc_error_lock);
2823 /* only keep first error */
2824 if (*dcp->dc_error == 0)
2825 *dcp->dc_error = err;
2826 mutex_exit(dcp->dc_error_lock);
2829 if (dcp->dc_ddname != NULL)
2830 spa_strfree(dcp->dc_ddname);
2831 kmem_free(dcp, sizeof (*dcp));
2835 dmu_objset_find_dp_cb(void *arg)
2837 dmu_objset_find_ctx_t *dcp = arg;
2838 dsl_pool_t *dp = dcp->dc_dp;
2841 * We need to get a pool_config_lock here, as there are several
2842 * assert(pool_config_held) down the stack. Getting a lock via
2843 * dsl_pool_config_enter is risky, as it might be stalled by a
2844 * pending writer. This would deadlock, as the write lock can
2845 * only be granted when our parent thread gives up the lock.
2846 * The _prio interface gives us priority over a pending writer.
2848 dsl_pool_config_enter_prio(dp, FTAG);
2850 dmu_objset_find_dp_impl(dcp);
2852 dsl_pool_config_exit(dp, FTAG);
2856 * Find objsets under and including ddobj, call func(ds) on each.
2857 * The order for the enumeration is completely undefined.
2858 * func is called with dsl_pool_config held.
2861 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
2862 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
2867 dmu_objset_find_ctx_t *dcp;
2870 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL);
2871 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP);
2874 dcp->dc_ddobj = ddobj;
2875 dcp->dc_ddname = NULL;
2876 dcp->dc_func = func;
2878 dcp->dc_flags = flags;
2879 dcp->dc_error_lock = &err_lock;
2880 dcp->dc_error = &error;
2882 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) {
2884 * In case a write lock is held we can't make use of
2885 * parallelism, as down the stack of the worker threads
2886 * the lock is asserted via dsl_pool_config_held.
2887 * In case of a read lock this is solved by getting a read
2888 * lock in each worker thread, which isn't possible in case
2889 * of a writer lock. So we fall back to the synchronous path
2891 * In the future it might be possible to get some magic into
2892 * dsl_pool_config_held in a way that it returns true for
2893 * the worker threads so that a single lock held from this
2894 * thread suffices. For now, stay single threaded.
2896 dmu_objset_find_dp_impl(dcp);
2897 mutex_destroy(&err_lock);
2902 ntasks = dmu_find_threads;
2904 ntasks = vdev_count_leaves(dp->dp_spa) * 4;
2905 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks,
2908 kmem_free(dcp, sizeof (*dcp));
2909 mutex_destroy(&err_lock);
2911 return (SET_ERROR(ENOMEM));
2915 /* dcp will be freed by task */
2916 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP);
2919 * PORTING: this code relies on the property of taskq_wait to wait
2920 * until no more tasks are queued and no more tasks are active. As
2921 * we always queue new tasks from within other tasks, task_wait
2922 * reliably waits for the full recursion to finish, even though we
2923 * enqueue new tasks after taskq_wait has been called.
2924 * On platforms other than illumos, taskq_wait may not have this
2929 mutex_destroy(&err_lock);
2935 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
2936 * The dp_config_rwlock must not be held when this is called, and it
2937 * will not be held when the callback is called.
2938 * Therefore this function should only be used when the pool is not changing
2939 * (e.g. in syncing context), or the callback can deal with the possible races.
2942 dmu_objset_find_impl(spa_t *spa, const char *name,
2943 int func(const char *, void *), void *arg, int flags)
2946 dsl_pool_t *dp = spa_get_dsl(spa);
2949 zap_attribute_t *attr;
2954 dsl_pool_config_enter(dp, FTAG);
2956 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
2958 dsl_pool_config_exit(dp, FTAG);
2962 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
2963 if (dd->dd_myname[0] == '$') {
2964 dsl_dir_rele(dd, FTAG);
2965 dsl_pool_config_exit(dp, FTAG);
2969 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
2970 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
2973 * Iterate over all children.
2975 if (flags & DS_FIND_CHILDREN) {
2976 for (zap_cursor_init(&zc, dp->dp_meta_objset,
2977 dsl_dir_phys(dd)->dd_child_dir_zapobj);
2978 zap_cursor_retrieve(&zc, attr) == 0;
2979 (void) zap_cursor_advance(&zc)) {
2980 ASSERT3U(attr->za_integer_length, ==,
2982 ASSERT3U(attr->za_num_integers, ==, 1);
2984 child = kmem_asprintf("%s/%s", name, attr->za_name);
2985 dsl_pool_config_exit(dp, FTAG);
2986 err = dmu_objset_find_impl(spa, child,
2988 dsl_pool_config_enter(dp, FTAG);
2989 kmem_strfree(child);
2993 zap_cursor_fini(&zc);
2996 dsl_dir_rele(dd, FTAG);
2997 dsl_pool_config_exit(dp, FTAG);
2998 kmem_free(attr, sizeof (zap_attribute_t));
3004 * Iterate over all snapshots.
3006 if (flags & DS_FIND_SNAPSHOTS) {
3007 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
3012 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
3013 dsl_dataset_rele(ds, FTAG);
3015 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
3016 zap_cursor_retrieve(&zc, attr) == 0;
3017 (void) zap_cursor_advance(&zc)) {
3018 ASSERT3U(attr->za_integer_length, ==,
3020 ASSERT3U(attr->za_num_integers, ==, 1);
3022 child = kmem_asprintf("%s@%s",
3023 name, attr->za_name);
3024 dsl_pool_config_exit(dp, FTAG);
3025 err = func(child, arg);
3026 dsl_pool_config_enter(dp, FTAG);
3027 kmem_strfree(child);
3031 zap_cursor_fini(&zc);
3035 dsl_dir_rele(dd, FTAG);
3036 kmem_free(attr, sizeof (zap_attribute_t));
3037 dsl_pool_config_exit(dp, FTAG);
3042 /* Apply to self. */
3043 return (func(name, arg));
3047 * See comment above dmu_objset_find_impl().
3050 dmu_objset_find(const char *name, int func(const char *, void *), void *arg,
3056 error = spa_open(name, &spa, FTAG);
3059 error = dmu_objset_find_impl(spa, name, func, arg, flags);
3060 spa_close(spa, FTAG);
3065 dmu_objset_incompatible_encryption_version(objset_t *os)
3067 return (dsl_dir_incompatible_encryption_version(
3068 os->os_dsl_dataset->ds_dir));
3072 dmu_objset_set_user(objset_t *os, void *user_ptr)
3074 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
3075 os->os_user_ptr = user_ptr;
3079 dmu_objset_get_user(objset_t *os)
3081 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
3082 return (os->os_user_ptr);
3086 * Determine name of filesystem, given name of snapshot.
3087 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes
3090 dmu_fsname(const char *snapname, char *buf)
3092 char *atp = strchr(snapname, '@');
3094 return (SET_ERROR(EINVAL));
3095 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN)
3096 return (SET_ERROR(ENAMETOOLONG));
3097 (void) strlcpy(buf, snapname, atp - snapname + 1);
3102 * Call when we think we're going to write/free space in open context
3103 * to track the amount of dirty data in the open txg, which is also the
3104 * amount of memory that can not be evicted until this txg syncs.
3106 * Note that there are two conditions where this can be called from
3109 * [1] When we just created the dataset, in which case we go on with
3110 * updating any accounting of dirty data as usual.
3111 * [2] When we are dirtying MOS data, in which case we only update the
3112 * pool's accounting of dirty data.
3115 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx)
3117 dsl_dataset_t *ds = os->os_dsl_dataset;
3118 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space);
3121 dsl_dir_willuse_space(ds->ds_dir, aspace, tx);
3124 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx);
3127 #if defined(_KERNEL)
3128 EXPORT_SYMBOL(dmu_objset_zil);
3129 EXPORT_SYMBOL(dmu_objset_pool);
3130 EXPORT_SYMBOL(dmu_objset_ds);
3131 EXPORT_SYMBOL(dmu_objset_type);
3132 EXPORT_SYMBOL(dmu_objset_name);
3133 EXPORT_SYMBOL(dmu_objset_hold);
3134 EXPORT_SYMBOL(dmu_objset_hold_flags);
3135 EXPORT_SYMBOL(dmu_objset_own);
3136 EXPORT_SYMBOL(dmu_objset_rele);
3137 EXPORT_SYMBOL(dmu_objset_rele_flags);
3138 EXPORT_SYMBOL(dmu_objset_disown);
3139 EXPORT_SYMBOL(dmu_objset_from_ds);
3140 EXPORT_SYMBOL(dmu_objset_create);
3141 EXPORT_SYMBOL(dmu_objset_clone);
3142 EXPORT_SYMBOL(dmu_objset_stats);
3143 EXPORT_SYMBOL(dmu_objset_fast_stat);
3144 EXPORT_SYMBOL(dmu_objset_spa);
3145 EXPORT_SYMBOL(dmu_objset_space);
3146 EXPORT_SYMBOL(dmu_objset_fsid_guid);
3147 EXPORT_SYMBOL(dmu_objset_find);
3148 EXPORT_SYMBOL(dmu_objset_byteswap);
3149 EXPORT_SYMBOL(dmu_objset_evict_dbufs);
3150 EXPORT_SYMBOL(dmu_objset_snap_cmtime);
3151 EXPORT_SYMBOL(dmu_objset_dnodesize);
3153 EXPORT_SYMBOL(dmu_objset_sync);
3154 EXPORT_SYMBOL(dmu_objset_is_dirty);
3155 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats);
3156 EXPORT_SYMBOL(dmu_objset_create_impl);
3157 EXPORT_SYMBOL(dmu_objset_open_impl);
3158 EXPORT_SYMBOL(dmu_objset_evict);
3159 EXPORT_SYMBOL(dmu_objset_register_type);
3160 EXPORT_SYMBOL(dmu_objset_sync_done);
3161 EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
3162 EXPORT_SYMBOL(dmu_objset_userused_enabled);
3163 EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
3164 EXPORT_SYMBOL(dmu_objset_userspace_present);
3165 EXPORT_SYMBOL(dmu_objset_userobjused_enabled);
3166 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable);
3167 EXPORT_SYMBOL(dmu_objset_userobjspace_present);
3168 EXPORT_SYMBOL(dmu_objset_projectquota_enabled);
3169 EXPORT_SYMBOL(dmu_objset_projectquota_present);
3170 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable);
3171 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade);