4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
27 #include <sys/zfs_context.h>
28 #include <sys/dmu_objset.h>
29 #include <sys/dsl_dir.h>
30 #include <sys/dsl_dataset.h>
31 #include <sys/dsl_prop.h>
32 #include <sys/dsl_pool.h>
33 #include <sys/dsl_synctask.h>
34 #include <sys/dsl_deleg.h>
35 #include <sys/dnode.h>
38 #include <sys/dmu_tx.h>
39 #include <sys/zio_checksum.h>
42 #include <sys/dmu_impl.h>
43 #include <sys/zfs_ioctl.h>
46 dmu_objset_spa(objset_t *os)
48 return (os->os->os_spa);
52 dmu_objset_zil(objset_t *os)
54 return (os->os->os_zil);
58 dmu_objset_pool(objset_t *os)
62 if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir)
63 return (ds->ds_dir->dd_pool);
65 return (spa_get_dsl(os->os->os_spa));
69 dmu_objset_ds(objset_t *os)
71 return (os->os->os_dsl_dataset);
75 dmu_objset_type(objset_t *os)
77 return (os->os->os_phys->os_type);
81 dmu_objset_name(objset_t *os, char *buf)
83 dsl_dataset_name(os->os->os_dsl_dataset, buf);
87 dmu_objset_id(objset_t *os)
89 dsl_dataset_t *ds = os->os->os_dsl_dataset;
91 return (ds ? ds->ds_object : 0);
95 checksum_changed_cb(void *arg, uint64_t newval)
97 objset_impl_t *osi = arg;
100 * Inheritance should have been done by now.
102 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
104 osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
108 compression_changed_cb(void *arg, uint64_t newval)
110 objset_impl_t *osi = arg;
113 * Inheritance and range checking should have been done by now.
115 ASSERT(newval != ZIO_COMPRESS_INHERIT);
117 osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
121 copies_changed_cb(void *arg, uint64_t newval)
123 objset_impl_t *osi = arg;
126 * Inheritance and range checking should have been done by now.
129 ASSERT(newval <= spa_max_replication(osi->os_spa));
131 osi->os_copies = newval;
135 primary_cache_changed_cb(void *arg, uint64_t newval)
137 objset_impl_t *osi = arg;
140 * Inheritance and range checking should have been done by now.
142 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
143 newval == ZFS_CACHE_METADATA);
145 osi->os_primary_cache = newval;
149 secondary_cache_changed_cb(void *arg, uint64_t newval)
151 objset_impl_t *osi = arg;
154 * Inheritance and range checking should have been done by now.
156 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
157 newval == ZFS_CACHE_METADATA);
159 osi->os_secondary_cache = newval;
163 dmu_objset_byteswap(void *buf, size_t size)
165 objset_phys_t *osp = buf;
167 ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
168 dnode_byteswap(&osp->os_meta_dnode);
169 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
170 osp->os_type = BSWAP_64(osp->os_type);
171 osp->os_flags = BSWAP_64(osp->os_flags);
172 if (size == sizeof (objset_phys_t)) {
173 dnode_byteswap(&osp->os_userused_dnode);
174 dnode_byteswap(&osp->os_groupused_dnode);
179 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
180 objset_impl_t **osip)
185 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
187 osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP);
189 osi->os_dsl_dataset = ds;
192 if (!BP_IS_HOLE(osi->os_rootbp)) {
193 uint32_t aflags = ARC_WAIT;
195 zb.zb_objset = ds ? ds->ds_object : 0;
199 if (DMU_OS_IS_L2CACHEABLE(osi))
200 aflags |= ARC_L2CACHE;
202 dprintf_bp(osi->os_rootbp, "reading %s", "");
204 * NB: when bprewrite scrub can change the bp,
205 * and this is called from dmu_objset_open_ds_os, the bp
206 * could change, and we'll need a lock.
208 err = arc_read_nolock(NULL, spa, osi->os_rootbp,
209 arc_getbuf_func, &osi->os_phys_buf,
210 ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
212 kmem_free(osi, sizeof (objset_impl_t));
213 /* convert checksum errors into IO errors */
219 /* Increase the blocksize if we are permitted. */
220 if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
221 arc_buf_size(osi->os_phys_buf) < sizeof (objset_phys_t)) {
222 arc_buf_t *buf = arc_buf_alloc(spa,
223 sizeof (objset_phys_t), &osi->os_phys_buf,
225 bzero(buf->b_data, sizeof (objset_phys_t));
226 bcopy(osi->os_phys_buf->b_data, buf->b_data,
227 arc_buf_size(osi->os_phys_buf));
228 (void) arc_buf_remove_ref(osi->os_phys_buf,
230 osi->os_phys_buf = buf;
233 osi->os_phys = osi->os_phys_buf->b_data;
234 osi->os_flags = osi->os_phys->os_flags;
236 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
237 sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
238 osi->os_phys_buf = arc_buf_alloc(spa, size,
239 &osi->os_phys_buf, ARC_BUFC_METADATA);
240 osi->os_phys = osi->os_phys_buf->b_data;
241 bzero(osi->os_phys, size);
245 * Note: the changed_cb will be called once before the register
246 * func returns, thus changing the checksum/compression from the
247 * default (fletcher2/off). Snapshots don't need to know about
248 * checksum/compression/copies.
251 err = dsl_prop_register(ds, "primarycache",
252 primary_cache_changed_cb, osi);
254 err = dsl_prop_register(ds, "secondarycache",
255 secondary_cache_changed_cb, osi);
256 if (!dsl_dataset_is_snapshot(ds)) {
258 err = dsl_prop_register(ds, "checksum",
259 checksum_changed_cb, osi);
261 err = dsl_prop_register(ds, "compression",
262 compression_changed_cb, osi);
264 err = dsl_prop_register(ds, "copies",
265 copies_changed_cb, osi);
268 VERIFY(arc_buf_remove_ref(osi->os_phys_buf,
269 &osi->os_phys_buf) == 1);
270 kmem_free(osi, sizeof (objset_impl_t));
273 } else if (ds == NULL) {
274 /* It's the meta-objset. */
275 osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
276 osi->os_compress = ZIO_COMPRESS_LZJB;
277 osi->os_copies = spa_max_replication(spa);
278 osi->os_primary_cache = ZFS_CACHE_ALL;
279 osi->os_secondary_cache = ZFS_CACHE_ALL;
282 osi->os_zil_header = osi->os_phys->os_zil_header;
283 osi->os_zil = zil_alloc(&osi->os, &osi->os_zil_header);
285 for (i = 0; i < TXG_SIZE; i++) {
286 list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t),
287 offsetof(dnode_t, dn_dirty_link[i]));
288 list_create(&osi->os_free_dnodes[i], sizeof (dnode_t),
289 offsetof(dnode_t, dn_dirty_link[i]));
291 list_create(&osi->os_dnodes, sizeof (dnode_t),
292 offsetof(dnode_t, dn_link));
293 list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
294 offsetof(dmu_buf_impl_t, db_link));
296 mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL);
297 mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
298 mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
300 osi->os_meta_dnode = dnode_special_open(osi,
301 &osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT);
302 if (arc_buf_size(osi->os_phys_buf) >= sizeof (objset_phys_t)) {
303 osi->os_userused_dnode = dnode_special_open(osi,
304 &osi->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT);
305 osi->os_groupused_dnode = dnode_special_open(osi,
306 &osi->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT);
310 * We should be the only thread trying to do this because we
311 * have ds_opening_lock
314 VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi,
323 dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type)
327 mutex_enter(&ds->ds_opening_lock);
328 osi = dsl_dataset_get_user_ptr(ds);
332 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
333 ds, &ds->ds_phys->ds_bp, &osi);
335 mutex_exit(&ds->ds_opening_lock);
339 mutex_exit(&ds->ds_opening_lock);
342 os->os_mode = DS_MODE_NOHOLD;
344 if (type != DMU_OST_ANY && type != os->os->os_phys->os_type)
350 dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp)
355 os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
356 err = dmu_objset_open_ds_os(ds, os, type);
358 kmem_free(os, sizeof (objset_t));
364 /* called from zpl */
366 dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
373 ASSERT(DS_MODE_TYPE(mode) == DS_MODE_USER ||
374 DS_MODE_TYPE(mode) == DS_MODE_OWNER);
376 os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
377 if (DS_MODE_TYPE(mode) == DS_MODE_USER)
378 err = dsl_dataset_hold(name, os, &ds);
380 err = dsl_dataset_own(name, mode, os, &ds);
382 kmem_free(os, sizeof (objset_t));
386 err = dmu_objset_open_ds_os(ds, os, type);
388 if (DS_MODE_TYPE(mode) == DS_MODE_USER)
389 dsl_dataset_rele(ds, os);
391 dsl_dataset_disown(ds, os);
392 kmem_free(os, sizeof (objset_t));
401 dmu_objset_close(objset_t *os)
403 ASSERT(DS_MODE_TYPE(os->os_mode) == DS_MODE_USER ||
404 DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER ||
405 DS_MODE_TYPE(os->os_mode) == DS_MODE_NOHOLD);
407 if (DS_MODE_TYPE(os->os_mode) == DS_MODE_USER)
408 dsl_dataset_rele(os->os->os_dsl_dataset, os);
409 else if (DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER)
410 dsl_dataset_disown(os->os->os_dsl_dataset, os);
411 kmem_free(os, sizeof (objset_t));
415 dmu_objset_evict_dbufs(objset_t *os)
417 objset_impl_t *osi = os->os;
420 mutex_enter(&osi->os_lock);
422 /* process the mdn last, since the other dnodes have holds on it */
423 list_remove(&osi->os_dnodes, osi->os_meta_dnode);
424 list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode);
427 * Find the first dnode with holds. We have to do this dance
428 * because dnode_add_ref() only works if you already have a
429 * hold. If there are no holds then it has no dbufs so OK to
432 for (dn = list_head(&osi->os_dnodes);
433 dn && !dnode_add_ref(dn, FTAG);
434 dn = list_next(&osi->os_dnodes, dn))
438 dnode_t *next_dn = dn;
441 next_dn = list_next(&osi->os_dnodes, next_dn);
442 } while (next_dn && !dnode_add_ref(next_dn, FTAG));
444 mutex_exit(&osi->os_lock);
445 dnode_evict_dbufs(dn);
446 dnode_rele(dn, FTAG);
447 mutex_enter(&osi->os_lock);
450 mutex_exit(&osi->os_lock);
451 return (list_head(&osi->os_dnodes) != osi->os_meta_dnode);
455 dmu_objset_evict(dsl_dataset_t *ds, void *arg)
457 objset_impl_t *osi = arg;
461 for (i = 0; i < TXG_SIZE; i++) {
462 ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL);
463 ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL);
467 if (!dsl_dataset_is_snapshot(ds)) {
468 VERIFY(0 == dsl_prop_unregister(ds, "checksum",
469 checksum_changed_cb, osi));
470 VERIFY(0 == dsl_prop_unregister(ds, "compression",
471 compression_changed_cb, osi));
472 VERIFY(0 == dsl_prop_unregister(ds, "copies",
473 copies_changed_cb, osi));
475 VERIFY(0 == dsl_prop_unregister(ds, "primarycache",
476 primary_cache_changed_cb, osi));
477 VERIFY(0 == dsl_prop_unregister(ds, "secondarycache",
478 secondary_cache_changed_cb, osi));
482 * We should need only a single pass over the dnode list, since
483 * nothing can be added to the list at this point.
486 (void) dmu_objset_evict_dbufs(&os);
488 dnode_special_close(osi->os_meta_dnode);
489 if (osi->os_userused_dnode) {
490 dnode_special_close(osi->os_userused_dnode);
491 dnode_special_close(osi->os_groupused_dnode);
493 zil_free(osi->os_zil);
495 ASSERT3P(list_head(&osi->os_dnodes), ==, NULL);
497 VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1);
498 mutex_destroy(&osi->os_lock);
499 mutex_destroy(&osi->os_obj_lock);
500 mutex_destroy(&osi->os_user_ptr_lock);
501 kmem_free(osi, sizeof (objset_impl_t));
504 /* called from dsl for meta-objset */
506 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
507 dmu_objset_type_t type, dmu_tx_t *tx)
512 ASSERT(dmu_tx_is_syncing(tx));
514 mutex_enter(&ds->ds_opening_lock);
515 VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi));
517 mutex_exit(&ds->ds_opening_lock);
518 mdn = osi->os_meta_dnode;
520 dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
521 DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
524 * We don't want to have to increase the meta-dnode's nlevels
525 * later, because then we could do it in quescing context while
526 * we are also accessing it in open context.
528 * This precaution is not necessary for the MOS (ds == NULL),
529 * because the MOS is only updated in syncing context.
530 * This is most fortunate: the MOS is the only objset that
531 * needs to be synced multiple times as spa_sync() iterates
532 * to convergence, so minimizing its dn_nlevels matters.
538 * Determine the number of levels necessary for the meta-dnode
539 * to contain DN_MAX_OBJECT dnodes.
541 while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift +
542 (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
543 DN_MAX_OBJECT * sizeof (dnode_phys_t))
546 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
547 mdn->dn_nlevels = levels;
550 ASSERT(type != DMU_OST_NONE);
551 ASSERT(type != DMU_OST_ANY);
552 ASSERT(type < DMU_OST_NUMTYPES);
553 osi->os_phys->os_type = type;
554 if (dmu_objset_userused_enabled(osi)) {
555 osi->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
556 osi->os_flags = osi->os_phys->os_flags;
559 dsl_dataset_dirty(ds, tx);
565 void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
567 dsl_dataset_t *clone_parent;
568 const char *lastname;
569 dmu_objset_type_t type;
575 dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx)
577 dsl_dir_t *dd = arg1;
578 struct oscarg *oa = arg2;
579 objset_t *mos = dd->dd_pool->dp_meta_objset;
583 err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
584 oa->lastname, sizeof (uint64_t), 1, &ddobj);
586 return (err ? err : EEXIST);
588 if (oa->clone_parent != NULL) {
590 * You can't clone across pools.
592 if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool)
596 * You can only clone snapshots, not the head datasets.
598 if (oa->clone_parent->ds_phys->ds_num_children == 0)
606 dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
608 dsl_dir_t *dd = arg1;
609 struct oscarg *oa = arg2;
614 ASSERT(dmu_tx_is_syncing(tx));
616 dsobj = dsl_dataset_create_sync(dd, oa->lastname,
617 oa->clone_parent, oa->flags, cr, tx);
619 VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, dsobj, FTAG, &ds));
620 bp = dsl_dataset_get_blkptr(ds);
621 if (BP_IS_HOLE(bp)) {
624 /* This is an empty dmu_objset; not a clone. */
625 osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds),
626 ds, bp, oa->type, tx);
629 oa->userfunc(&osi->os, oa->userarg, cr, tx);
632 spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa,
633 tx, cr, "dataset = %llu", dsobj);
635 dsl_dataset_rele(ds, FTAG);
639 dmu_objset_create(const char *name, dmu_objset_type_t type,
640 objset_t *clone_parent, uint64_t flags,
641 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
646 struct oscarg oa = { 0 };
648 ASSERT(strchr(name, '@') == NULL);
649 err = dsl_dir_open(name, FTAG, &pdd, &tail);
653 dsl_dir_close(pdd, FTAG);
657 dprintf("name=%s\n", name);
665 if (clone_parent != NULL) {
667 * You can't clone to a different type.
669 if (clone_parent->os->os_phys->os_type != type) {
670 dsl_dir_close(pdd, FTAG);
673 oa.clone_parent = clone_parent->os->os_dsl_dataset;
675 err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
676 dmu_objset_create_sync, pdd, &oa, 5);
677 dsl_dir_close(pdd, FTAG);
682 dmu_objset_destroy(const char *name)
688 * If it looks like we'll be able to destroy it, and there's
689 * an unplayed replay log sitting around, destroy the log.
690 * It would be nicer to do this in dsl_dataset_destroy_sync(),
691 * but the replay log objset is modified in open context.
693 error = dmu_objset_open(name, DMU_OST_ANY,
694 DS_MODE_OWNER|DS_MODE_READONLY|DS_MODE_INCONSISTENT, &os);
696 dsl_dataset_t *ds = os->os->os_dsl_dataset;
697 zil_destroy(dmu_objset_zil(os), B_FALSE);
699 error = dsl_dataset_destroy(ds, os);
701 * dsl_dataset_destroy() closes the ds.
703 kmem_free(os, sizeof (objset_t));
710 * This will close the objset.
713 dmu_objset_rollback(objset_t *os)
718 ds = os->os->os_dsl_dataset;
720 if (!dsl_dataset_tryown(ds, TRUE, os)) {
721 dmu_objset_close(os);
725 err = dsl_dataset_rollback(ds, os->os->os_phys->os_type);
728 * NB: we close the objset manually because the rollback
729 * actually implicitly called dmu_objset_evict(), thus freeing
732 dsl_dataset_disown(ds, os);
733 kmem_free(os, sizeof (objset_t));
738 dsl_sync_task_group_t *dstg;
740 char failed[MAXPATHLEN];
741 boolean_t checkperms;
746 snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx)
749 struct snaparg *sn = arg2;
751 /* The props have already been checked by zfs_check_userprops(). */
753 return (dsl_dataset_snapshot_check(os->os->os_dsl_dataset,
758 snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
761 dsl_dataset_t *ds = os->os->os_dsl_dataset;
762 struct snaparg *sn = arg2;
764 dsl_dataset_snapshot_sync(ds, sn->snapname, cr, tx);
767 dsl_props_set_sync(ds->ds_prev, sn->props, cr, tx);
771 dmu_objset_snapshot_one(char *name, void *arg)
773 struct snaparg *sn = arg;
777 (void) strcpy(sn->failed, name);
780 * Check permissions only when requested. This only applies when
781 * doing a recursive snapshot. The permission checks for the starting
782 * dataset have already been performed in zfs_secpolicy_snapshot()
784 if (sn->checkperms == B_TRUE &&
785 (err = zfs_secpolicy_snapshot_perms(name, CRED())))
788 err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os);
792 /* If the objset is in an inconsistent state, return busy */
793 if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
794 dmu_objset_close(os);
799 * NB: we need to wait for all in-flight changes to get to disk,
800 * so that we snapshot those changes. zil_suspend does this as
803 err = zil_suspend(dmu_objset_zil(os));
805 dsl_sync_task_create(sn->dstg, snapshot_check,
806 snapshot_sync, os, sn, 3);
808 dmu_objset_close(os);
815 dmu_objset_snapshot(char *fsname, char *snapname,
816 nvlist_t *props, boolean_t recursive)
818 dsl_sync_task_t *dst;
823 (void) strcpy(sn.failed, fsname);
825 err = spa_open(fsname, &spa, FTAG);
829 sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
830 sn.snapname = snapname;
834 sn.checkperms = B_TRUE;
835 err = dmu_objset_find(fsname,
836 dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN);
838 sn.checkperms = B_FALSE;
839 err = dmu_objset_snapshot_one(fsname, &sn);
843 err = dsl_sync_task_group_wait(sn.dstg);
845 for (dst = list_head(&sn.dstg->dstg_tasks); dst;
846 dst = list_next(&sn.dstg->dstg_tasks, dst)) {
847 objset_t *os = dst->dst_arg1;
848 dsl_dataset_t *ds = os->os->os_dsl_dataset;
850 dsl_dataset_name(ds, sn.failed);
851 zil_resume(dmu_objset_zil(os));
852 dmu_objset_close(os);
856 (void) strcpy(fsname, sn.failed);
857 dsl_sync_task_group_destroy(sn.dstg);
858 spa_close(spa, FTAG);
863 dmu_objset_sync_dnodes(list_t *list, list_t *newlist, dmu_tx_t *tx)
867 while (dn = list_head(list)) {
868 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
869 ASSERT(dn->dn_dbuf->db_data_pending);
871 * Initialize dn_zio outside dnode_sync() because the
872 * meta-dnode needs to set it ouside dnode_sync().
874 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
877 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
878 list_remove(list, dn);
881 (void) dnode_add_ref(dn, newlist);
882 list_insert_tail(newlist, dn);
891 ready(zio_t *zio, arc_buf_t *abuf, void *arg)
893 blkptr_t *bp = zio->io_bp;
894 blkptr_t *bp_orig = &zio->io_bp_orig;
895 objset_impl_t *os = arg;
896 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
898 ASSERT(bp == os->os_rootbp);
899 ASSERT(BP_GET_TYPE(bp) == DMU_OT_OBJSET);
900 ASSERT(BP_GET_LEVEL(bp) == 0);
903 * Update rootbp fill count: it should be the number of objects
904 * allocated in the object set (not counting the "special"
905 * objects that are stored in the objset_phys_t -- the meta
906 * dnode and user/group accounting objects).
909 for (int i = 0; i < dnp->dn_nblkptr; i++)
910 bp->blk_fill += dnp->dn_blkptr[i].blk_fill;
912 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
913 ASSERT(DVA_EQUAL(BP_IDENTITY(bp), BP_IDENTITY(bp_orig)));
915 if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg)
916 (void) dsl_dataset_block_kill(os->os_dsl_dataset,
917 &zio->io_bp_orig, zio, os->os_synctx);
918 dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx);
922 /* called from dsl */
924 dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx)
928 writeprops_t wp = { 0 };
931 list_t *newlist = NULL;
932 dbuf_dirty_record_t *dr;
934 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
936 ASSERT(dmu_tx_is_syncing(tx));
937 /* XXX the write_done callback should really give us the tx... */
940 if (os->os_dsl_dataset == NULL) {
942 * This is the MOS. If we have upgraded,
943 * spa_max_replication() could change, so reset
946 os->os_copies = spa_max_replication(os->os_spa);
950 * Create the root block IO
952 zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0;
954 zb.zb_level = -1; /* for block ordering; it's level 0 on disk */
957 wp.wp_type = DMU_OT_OBJSET;
958 wp.wp_level = 0; /* on-disk BP level; see above */
959 wp.wp_copies = os->os_copies;
960 wp.wp_oschecksum = os->os_checksum;
961 wp.wp_oscompress = os->os_compress;
963 if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) {
964 (void) dsl_dataset_block_kill(os->os_dsl_dataset,
965 os->os_rootbp, pio, tx);
968 arc_release(os->os_phys_buf, &os->os_phys_buf);
970 zio = arc_write(pio, os->os_spa, &wp, DMU_OS_IS_L2CACHEABLE(os),
971 tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, NULL, os,
972 ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
975 * Sync special dnodes - the parent IO for the sync is the root block
977 os->os_meta_dnode->dn_zio = zio;
978 dnode_sync(os->os_meta_dnode, tx);
980 os->os_phys->os_flags = os->os_flags;
982 if (os->os_userused_dnode &&
983 os->os_userused_dnode->dn_type != DMU_OT_NONE) {
984 os->os_userused_dnode->dn_zio = zio;
985 dnode_sync(os->os_userused_dnode, tx);
986 os->os_groupused_dnode->dn_zio = zio;
987 dnode_sync(os->os_groupused_dnode, tx);
990 txgoff = tx->tx_txg & TXG_MASK;
992 if (dmu_objset_userused_enabled(os)) {
993 newlist = &os->os_synced_dnodes;
995 * We must create the list here because it uses the
996 * dn_dirty_link[] of this txg.
998 list_create(newlist, sizeof (dnode_t),
999 offsetof(dnode_t, dn_dirty_link[txgoff]));
1002 dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx);
1003 dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx);
1005 list = &os->os_meta_dnode->dn_dirty_records[txgoff];
1006 while (dr = list_head(list)) {
1007 ASSERT(dr->dr_dbuf->db_level == 0);
1008 list_remove(list, dr);
1010 zio_nowait(dr->dr_zio);
1013 * Free intent log blocks up to this tx.
1015 zil_sync(os->os_zil, tx);
1016 os->os_phys->os_zil_header = os->os_zil_header;
1020 static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
1023 dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
1029 dmu_objset_userused_enabled(objset_impl_t *os)
1031 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1032 used_cbs[os->os_phys->os_type] &&
1033 os->os_userused_dnode);
1037 dmu_objset_do_userquota_callbacks(objset_impl_t *os, dmu_tx_t *tx)
1040 list_t *list = &os->os_synced_dnodes;
1041 static const char zerobuf[DN_MAX_BONUSLEN] = {0};
1043 ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os));
1045 while (dn = list_head(list)) {
1046 dmu_object_type_t bonustype;
1048 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
1049 ASSERT(dn->dn_oldphys);
1050 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
1051 dn->dn_phys->dn_flags &
1052 DNODE_FLAG_USERUSED_ACCOUNTED);
1054 /* Allocate the user/groupused objects if necessary. */
1055 if (os->os_userused_dnode->dn_type == DMU_OT_NONE) {
1056 VERIFY(0 == zap_create_claim(&os->os,
1057 DMU_USERUSED_OBJECT,
1058 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1059 VERIFY(0 == zap_create_claim(&os->os,
1060 DMU_GROUPUSED_OBJECT,
1061 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1065 * If the object was not previously
1066 * accounted, pretend that it was free.
1068 if (!(dn->dn_oldphys->dn_flags &
1069 DNODE_FLAG_USERUSED_ACCOUNTED)) {
1070 bzero(dn->dn_oldphys, sizeof (dnode_phys_t));
1074 * If the object was freed, use the previous bonustype.
1076 bonustype = dn->dn_phys->dn_bonustype ?
1077 dn->dn_phys->dn_bonustype : dn->dn_oldphys->dn_bonustype;
1078 ASSERT(dn->dn_phys->dn_type != 0 ||
1079 (bcmp(DN_BONUS(dn->dn_phys), zerobuf,
1080 DN_MAX_BONUSLEN) == 0 &&
1081 DN_USED_BYTES(dn->dn_phys) == 0));
1082 ASSERT(dn->dn_oldphys->dn_type != 0 ||
1083 (bcmp(DN_BONUS(dn->dn_oldphys), zerobuf,
1084 DN_MAX_BONUSLEN) == 0 &&
1085 DN_USED_BYTES(dn->dn_oldphys) == 0));
1086 used_cbs[os->os_phys->os_type](&os->os, bonustype,
1087 DN_BONUS(dn->dn_oldphys), DN_BONUS(dn->dn_phys),
1088 DN_USED_BYTES(dn->dn_oldphys),
1089 DN_USED_BYTES(dn->dn_phys), tx);
1092 * The mutex is needed here for interlock with dnode_allocate.
1094 mutex_enter(&dn->dn_mtx);
1095 zio_buf_free(dn->dn_oldphys, sizeof (dnode_phys_t));
1096 dn->dn_oldphys = NULL;
1097 mutex_exit(&dn->dn_mtx);
1099 list_remove(list, dn);
1100 dnode_rele(dn, list);
1105 dmu_objset_userspace_present(objset_t *os)
1107 return (os->os->os_phys->os_flags &
1108 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
1112 dmu_objset_userspace_upgrade(objset_t *os)
1117 if (dmu_objset_userspace_present(os))
1119 if (!dmu_objset_userused_enabled(os->os))
1121 if (dmu_objset_is_snapshot(os))
1125 * We simply need to mark every object dirty, so that it will be
1126 * synced out and now accounted. If this is called
1127 * concurrently, or if we already did some work before crashing,
1128 * that's fine, since we track each object's accounted state
1132 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
1133 dmu_tx_t *tx = dmu_tx_create(os);
1137 if (issig(JUSTLOOKING) && issig(FORREAL))
1140 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
1143 dmu_tx_hold_bonus(tx, obj);
1144 objerr = dmu_tx_assign(tx, TXG_WAIT);
1149 dmu_buf_will_dirty(db, tx);
1150 dmu_buf_rele(db, FTAG);
1154 os->os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1155 txg_wait_synced(dmu_objset_pool(os), 0);
1160 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
1161 uint64_t *usedobjsp, uint64_t *availobjsp)
1163 dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp,
1164 usedobjsp, availobjsp);
1168 dmu_objset_fsid_guid(objset_t *os)
1170 return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset));
1174 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
1176 stat->dds_type = os->os->os_phys->os_type;
1177 if (os->os->os_dsl_dataset)
1178 dsl_dataset_fast_stat(os->os->os_dsl_dataset, stat);
1182 dmu_objset_stats(objset_t *os, nvlist_t *nv)
1184 ASSERT(os->os->os_dsl_dataset ||
1185 os->os->os_phys->os_type == DMU_OST_META);
1187 if (os->os->os_dsl_dataset != NULL)
1188 dsl_dataset_stats(os->os->os_dsl_dataset, nv);
1190 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
1191 os->os->os_phys->os_type);
1192 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
1193 dmu_objset_userspace_present(os));
1197 dmu_objset_is_snapshot(objset_t *os)
1199 if (os->os->os_dsl_dataset != NULL)
1200 return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset));
1206 dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
1207 boolean_t *conflict)
1209 dsl_dataset_t *ds = os->os->os_dsl_dataset;
1212 if (ds->ds_phys->ds_snapnames_zapobj == 0)
1215 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
1216 ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST,
1217 real, maxlen, conflict));
1221 dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
1222 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
1224 dsl_dataset_t *ds = os->os->os_dsl_dataset;
1225 zap_cursor_t cursor;
1226 zap_attribute_t attr;
1228 if (ds->ds_phys->ds_snapnames_zapobj == 0)
1231 zap_cursor_init_serialized(&cursor,
1232 ds->ds_dir->dd_pool->dp_meta_objset,
1233 ds->ds_phys->ds_snapnames_zapobj, *offp);
1235 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1236 zap_cursor_fini(&cursor);
1240 if (strlen(attr.za_name) + 1 > namelen) {
1241 zap_cursor_fini(&cursor);
1242 return (ENAMETOOLONG);
1245 (void) strcpy(name, attr.za_name);
1247 *idp = attr.za_first_integer;
1249 *case_conflict = attr.za_normalization_conflict;
1250 zap_cursor_advance(&cursor);
1251 *offp = zap_cursor_serialize(&cursor);
1252 zap_cursor_fini(&cursor);
1258 dmu_dir_list_next(objset_t *os, int namelen, char *name,
1259 uint64_t *idp, uint64_t *offp)
1261 dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir;
1262 zap_cursor_t cursor;
1263 zap_attribute_t attr;
1265 /* there is no next dir on a snapshot! */
1266 if (os->os->os_dsl_dataset->ds_object !=
1267 dd->dd_phys->dd_head_dataset_obj)
1270 zap_cursor_init_serialized(&cursor,
1271 dd->dd_pool->dp_meta_objset,
1272 dd->dd_phys->dd_child_dir_zapobj, *offp);
1274 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1275 zap_cursor_fini(&cursor);
1279 if (strlen(attr.za_name) + 1 > namelen) {
1280 zap_cursor_fini(&cursor);
1281 return (ENAMETOOLONG);
1284 (void) strcpy(name, attr.za_name);
1286 *idp = attr.za_first_integer;
1287 zap_cursor_advance(&cursor);
1288 *offp = zap_cursor_serialize(&cursor);
1289 zap_cursor_fini(&cursor);
1295 int (*func)(char *, void *);
1301 findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
1303 struct findarg *fa = arg;
1304 return (fa->func((char *)dsname, fa->arg));
1308 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
1309 * Perhaps change all callers to use dmu_objset_find_spa()?
1312 dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags)
1317 return (dmu_objset_find_spa(NULL, name, findfunc, &fa, flags));
1321 * Find all objsets under name, call func on each
1324 dmu_objset_find_spa(spa_t *spa, const char *name,
1325 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags)
1331 zap_attribute_t *attr;
1337 name = spa_name(spa);
1338 err = dsl_dir_open_spa(spa, name, FTAG, &dd, NULL);
1342 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1343 if (dd->dd_myname[0] == '$') {
1344 dsl_dir_close(dd, FTAG);
1348 thisobj = dd->dd_phys->dd_head_dataset_obj;
1349 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
1353 * Iterate over all children.
1355 if (flags & DS_FIND_CHILDREN) {
1356 for (zap_cursor_init(&zc, dp->dp_meta_objset,
1357 dd->dd_phys->dd_child_dir_zapobj);
1358 zap_cursor_retrieve(&zc, attr) == 0;
1359 (void) zap_cursor_advance(&zc)) {
1360 ASSERT(attr->za_integer_length == sizeof (uint64_t));
1361 ASSERT(attr->za_num_integers == 1);
1363 child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
1364 (void) strcpy(child, name);
1365 (void) strcat(child, "/");
1366 (void) strcat(child, attr->za_name);
1367 err = dmu_objset_find_spa(spa, child, func, arg, flags);
1368 kmem_free(child, MAXPATHLEN);
1372 zap_cursor_fini(&zc);
1375 dsl_dir_close(dd, FTAG);
1376 kmem_free(attr, sizeof (zap_attribute_t));
1382 * Iterate over all snapshots.
1384 if (flags & DS_FIND_SNAPSHOTS) {
1385 if (!dsl_pool_sync_context(dp))
1386 rw_enter(&dp->dp_config_rwlock, RW_READER);
1387 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
1388 if (!dsl_pool_sync_context(dp))
1389 rw_exit(&dp->dp_config_rwlock);
1392 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
1393 dsl_dataset_rele(ds, FTAG);
1395 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
1396 zap_cursor_retrieve(&zc, attr) == 0;
1397 (void) zap_cursor_advance(&zc)) {
1398 ASSERT(attr->za_integer_length ==
1400 ASSERT(attr->za_num_integers == 1);
1402 child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
1403 (void) strcpy(child, name);
1404 (void) strcat(child, "@");
1405 (void) strcat(child, attr->za_name);
1406 err = func(spa, attr->za_first_integer,
1408 kmem_free(child, MAXPATHLEN);
1412 zap_cursor_fini(&zc);
1416 dsl_dir_close(dd, FTAG);
1417 kmem_free(attr, sizeof (zap_attribute_t));
1423 * Apply to self if appropriate.
1425 err = func(spa, thisobj, name, arg);
1431 dmu_objset_prefetch(char *name, void *arg)
1435 if (dsl_dataset_hold(name, FTAG, &ds))
1438 if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
1439 mutex_enter(&ds->ds_opening_lock);
1440 if (!dsl_dataset_get_user_ptr(ds)) {
1441 uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
1444 zb.zb_objset = ds->ds_object;
1449 (void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
1450 &ds->ds_phys->ds_bp, NULL, NULL,
1451 ZIO_PRIORITY_ASYNC_READ,
1452 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
1455 mutex_exit(&ds->ds_opening_lock);
1458 dsl_dataset_rele(ds, FTAG);
1463 dmu_objset_set_user(objset_t *os, void *user_ptr)
1465 ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
1466 os->os->os_user_ptr = user_ptr;
1470 dmu_objset_get_user(objset_t *os)
1472 ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
1473 return (os->os->os_user_ptr);