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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
27 /* Portions Copyright 2010 Robert Milkowski */
30 #include <sys/zfs_context.h>
31 #include <sys/dmu_objset.h>
32 #include <sys/dsl_dir.h>
33 #include <sys/dsl_dataset.h>
34 #include <sys/dsl_prop.h>
35 #include <sys/dsl_pool.h>
36 #include <sys/dsl_synctask.h>
37 #include <sys/dsl_deleg.h>
38 #include <sys/dnode.h>
41 #include <sys/dmu_tx.h>
44 #include <sys/dmu_impl.h>
45 #include <sys/zfs_ioctl.h>
47 #include <sys/zfs_onexit.h>
48 #include <sys/dsl_destroy.h>
51 * Needed to close a window in dnode_move() that allows the objset to be freed
52 * before it can be safely accessed.
59 rw_init(&os_lock
, NULL
, RW_DEFAULT
, NULL
);
69 dmu_objset_spa(objset_t
*os
)
75 dmu_objset_zil(objset_t
*os
)
81 dmu_objset_pool(objset_t
*os
)
85 if ((ds
= os
->os_dsl_dataset
) != NULL
&& ds
->ds_dir
)
86 return (ds
->ds_dir
->dd_pool
);
88 return (spa_get_dsl(os
->os_spa
));
92 dmu_objset_ds(objset_t
*os
)
94 return (os
->os_dsl_dataset
);
98 dmu_objset_type(objset_t
*os
)
100 return (os
->os_phys
->os_type
);
104 dmu_objset_name(objset_t
*os
, char *buf
)
106 dsl_dataset_name(os
->os_dsl_dataset
, buf
);
110 dmu_objset_id(objset_t
*os
)
112 dsl_dataset_t
*ds
= os
->os_dsl_dataset
;
114 return (ds
? ds
->ds_object
: 0);
118 dmu_objset_syncprop(objset_t
*os
)
120 return (os
->os_sync
);
124 dmu_objset_logbias(objset_t
*os
)
126 return (os
->os_logbias
);
130 checksum_changed_cb(void *arg
, uint64_t newval
)
135 * Inheritance should have been done by now.
137 ASSERT(newval
!= ZIO_CHECKSUM_INHERIT
);
139 os
->os_checksum
= zio_checksum_select(newval
, ZIO_CHECKSUM_ON_VALUE
);
143 compression_changed_cb(void *arg
, uint64_t newval
)
148 * Inheritance and range checking should have been done by now.
150 ASSERT(newval
!= ZIO_COMPRESS_INHERIT
);
152 os
->os_compress
= zio_compress_select(newval
, ZIO_COMPRESS_ON_VALUE
);
156 copies_changed_cb(void *arg
, uint64_t newval
)
161 * Inheritance and range checking should have been done by now.
164 ASSERT(newval
<= spa_max_replication(os
->os_spa
));
166 os
->os_copies
= newval
;
170 dedup_changed_cb(void *arg
, uint64_t newval
)
173 spa_t
*spa
= os
->os_spa
;
174 enum zio_checksum checksum
;
177 * Inheritance should have been done by now.
179 ASSERT(newval
!= ZIO_CHECKSUM_INHERIT
);
181 checksum
= zio_checksum_dedup_select(spa
, newval
, ZIO_CHECKSUM_OFF
);
183 os
->os_dedup_checksum
= checksum
& ZIO_CHECKSUM_MASK
;
184 os
->os_dedup_verify
= !!(checksum
& ZIO_CHECKSUM_VERIFY
);
188 primary_cache_changed_cb(void *arg
, uint64_t newval
)
193 * Inheritance and range checking should have been done by now.
195 ASSERT(newval
== ZFS_CACHE_ALL
|| newval
== ZFS_CACHE_NONE
||
196 newval
== ZFS_CACHE_METADATA
);
198 os
->os_primary_cache
= newval
;
202 secondary_cache_changed_cb(void *arg
, uint64_t newval
)
207 * Inheritance and range checking should have been done by now.
209 ASSERT(newval
== ZFS_CACHE_ALL
|| newval
== ZFS_CACHE_NONE
||
210 newval
== ZFS_CACHE_METADATA
);
212 os
->os_secondary_cache
= newval
;
216 sync_changed_cb(void *arg
, uint64_t newval
)
221 * Inheritance and range checking should have been done by now.
223 ASSERT(newval
== ZFS_SYNC_STANDARD
|| newval
== ZFS_SYNC_ALWAYS
||
224 newval
== ZFS_SYNC_DISABLED
);
226 os
->os_sync
= newval
;
228 zil_set_sync(os
->os_zil
, newval
);
232 redundant_metadata_changed_cb(void *arg
, uint64_t newval
)
237 * Inheritance and range checking should have been done by now.
239 ASSERT(newval
== ZFS_REDUNDANT_METADATA_ALL
||
240 newval
== ZFS_REDUNDANT_METADATA_MOST
);
242 os
->os_redundant_metadata
= newval
;
246 logbias_changed_cb(void *arg
, uint64_t newval
)
250 ASSERT(newval
== ZFS_LOGBIAS_LATENCY
||
251 newval
== ZFS_LOGBIAS_THROUGHPUT
);
252 os
->os_logbias
= newval
;
254 zil_set_logbias(os
->os_zil
, newval
);
258 dmu_objset_byteswap(void *buf
, size_t size
)
260 objset_phys_t
*osp
= buf
;
262 ASSERT(size
== OBJSET_OLD_PHYS_SIZE
|| size
== sizeof (objset_phys_t
));
263 dnode_byteswap(&osp
->os_meta_dnode
);
264 byteswap_uint64_array(&osp
->os_zil_header
, sizeof (zil_header_t
));
265 osp
->os_type
= BSWAP_64(osp
->os_type
);
266 osp
->os_flags
= BSWAP_64(osp
->os_flags
);
267 if (size
== sizeof (objset_phys_t
)) {
268 dnode_byteswap(&osp
->os_userused_dnode
);
269 dnode_byteswap(&osp
->os_groupused_dnode
);
274 dmu_objset_open_impl(spa_t
*spa
, dsl_dataset_t
*ds
, blkptr_t
*bp
,
280 ASSERT(ds
== NULL
|| MUTEX_HELD(&ds
->ds_opening_lock
));
282 os
= kmem_zalloc(sizeof (objset_t
), KM_PUSHPAGE
);
283 os
->os_dsl_dataset
= ds
;
286 if (!BP_IS_HOLE(os
->os_rootbp
)) {
287 uint32_t aflags
= ARC_WAIT
;
289 SET_BOOKMARK(&zb
, ds
? ds
->ds_object
: DMU_META_OBJSET
,
290 ZB_ROOT_OBJECT
, ZB_ROOT_LEVEL
, ZB_ROOT_BLKID
);
292 if (DMU_OS_IS_L2CACHEABLE(os
))
293 aflags
|= ARC_L2CACHE
;
294 if (DMU_OS_IS_L2COMPRESSIBLE(os
))
295 aflags
|= ARC_L2COMPRESS
;
297 dprintf_bp(os
->os_rootbp
, "reading %s", "");
298 err
= arc_read(NULL
, spa
, os
->os_rootbp
,
299 arc_getbuf_func
, &os
->os_phys_buf
,
300 ZIO_PRIORITY_SYNC_READ
, ZIO_FLAG_CANFAIL
, &aflags
, &zb
);
302 kmem_free(os
, sizeof (objset_t
));
303 /* convert checksum errors into IO errors */
305 err
= SET_ERROR(EIO
);
309 /* Increase the blocksize if we are permitted. */
310 if (spa_version(spa
) >= SPA_VERSION_USERSPACE
&&
311 arc_buf_size(os
->os_phys_buf
) < sizeof (objset_phys_t
)) {
312 arc_buf_t
*buf
= arc_buf_alloc(spa
,
313 sizeof (objset_phys_t
), &os
->os_phys_buf
,
315 bzero(buf
->b_data
, sizeof (objset_phys_t
));
316 bcopy(os
->os_phys_buf
->b_data
, buf
->b_data
,
317 arc_buf_size(os
->os_phys_buf
));
318 (void) arc_buf_remove_ref(os
->os_phys_buf
,
320 os
->os_phys_buf
= buf
;
323 os
->os_phys
= os
->os_phys_buf
->b_data
;
324 os
->os_flags
= os
->os_phys
->os_flags
;
326 int size
= spa_version(spa
) >= SPA_VERSION_USERSPACE
?
327 sizeof (objset_phys_t
) : OBJSET_OLD_PHYS_SIZE
;
328 os
->os_phys_buf
= arc_buf_alloc(spa
, size
,
329 &os
->os_phys_buf
, ARC_BUFC_METADATA
);
330 os
->os_phys
= os
->os_phys_buf
->b_data
;
331 bzero(os
->os_phys
, size
);
335 * Note: the changed_cb will be called once before the register
336 * func returns, thus changing the checksum/compression from the
337 * default (fletcher2/off). Snapshots don't need to know about
338 * checksum/compression/copies.
341 err
= dsl_prop_register(ds
,
342 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE
),
343 primary_cache_changed_cb
, os
);
345 err
= dsl_prop_register(ds
,
346 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE
),
347 secondary_cache_changed_cb
, os
);
349 if (!dsl_dataset_is_snapshot(ds
)) {
351 err
= dsl_prop_register(ds
,
352 zfs_prop_to_name(ZFS_PROP_CHECKSUM
),
353 checksum_changed_cb
, os
);
356 err
= dsl_prop_register(ds
,
357 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
358 compression_changed_cb
, os
);
361 err
= dsl_prop_register(ds
,
362 zfs_prop_to_name(ZFS_PROP_COPIES
),
363 copies_changed_cb
, os
);
366 err
= dsl_prop_register(ds
,
367 zfs_prop_to_name(ZFS_PROP_DEDUP
),
368 dedup_changed_cb
, os
);
371 err
= dsl_prop_register(ds
,
372 zfs_prop_to_name(ZFS_PROP_LOGBIAS
),
373 logbias_changed_cb
, os
);
376 err
= dsl_prop_register(ds
,
377 zfs_prop_to_name(ZFS_PROP_SYNC
),
378 sync_changed_cb
, os
);
381 err
= dsl_prop_register(ds
,
383 ZFS_PROP_REDUNDANT_METADATA
),
384 redundant_metadata_changed_cb
, os
);
388 VERIFY(arc_buf_remove_ref(os
->os_phys_buf
,
390 kmem_free(os
, sizeof (objset_t
));
394 /* It's the meta-objset. */
395 os
->os_checksum
= ZIO_CHECKSUM_FLETCHER_4
;
396 os
->os_compress
= ZIO_COMPRESS_LZJB
;
397 os
->os_copies
= spa_max_replication(spa
);
398 os
->os_dedup_checksum
= ZIO_CHECKSUM_OFF
;
399 os
->os_dedup_verify
= B_FALSE
;
400 os
->os_logbias
= ZFS_LOGBIAS_LATENCY
;
401 os
->os_sync
= ZFS_SYNC_STANDARD
;
402 os
->os_primary_cache
= ZFS_CACHE_ALL
;
403 os
->os_secondary_cache
= ZFS_CACHE_ALL
;
406 if (ds
== NULL
|| !dsl_dataset_is_snapshot(ds
))
407 os
->os_zil_header
= os
->os_phys
->os_zil_header
;
408 os
->os_zil
= zil_alloc(os
, &os
->os_zil_header
);
410 for (i
= 0; i
< TXG_SIZE
; i
++) {
411 list_create(&os
->os_dirty_dnodes
[i
], sizeof (dnode_t
),
412 offsetof(dnode_t
, dn_dirty_link
[i
]));
413 list_create(&os
->os_free_dnodes
[i
], sizeof (dnode_t
),
414 offsetof(dnode_t
, dn_dirty_link
[i
]));
416 list_create(&os
->os_dnodes
, sizeof (dnode_t
),
417 offsetof(dnode_t
, dn_link
));
418 list_create(&os
->os_downgraded_dbufs
, sizeof (dmu_buf_impl_t
),
419 offsetof(dmu_buf_impl_t
, db_link
));
421 mutex_init(&os
->os_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
422 mutex_init(&os
->os_obj_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
423 mutex_init(&os
->os_user_ptr_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
425 DMU_META_DNODE(os
) = dnode_special_open(os
,
426 &os
->os_phys
->os_meta_dnode
, DMU_META_DNODE_OBJECT
,
428 if (arc_buf_size(os
->os_phys_buf
) >= sizeof (objset_phys_t
)) {
429 DMU_USERUSED_DNODE(os
) = dnode_special_open(os
,
430 &os
->os_phys
->os_userused_dnode
, DMU_USERUSED_OBJECT
,
431 &os
->os_userused_dnode
);
432 DMU_GROUPUSED_DNODE(os
) = dnode_special_open(os
,
433 &os
->os_phys
->os_groupused_dnode
, DMU_GROUPUSED_OBJECT
,
434 &os
->os_groupused_dnode
);
442 dmu_objset_from_ds(dsl_dataset_t
*ds
, objset_t
**osp
)
446 mutex_enter(&ds
->ds_opening_lock
);
447 if (ds
->ds_objset
== NULL
) {
449 err
= dmu_objset_open_impl(dsl_dataset_get_spa(ds
),
450 ds
, dsl_dataset_get_blkptr(ds
), &os
);
453 mutex_enter(&ds
->ds_lock
);
454 ASSERT(ds
->ds_objset
== NULL
);
456 mutex_exit(&ds
->ds_lock
);
459 *osp
= ds
->ds_objset
;
460 mutex_exit(&ds
->ds_opening_lock
);
465 * Holds the pool while the objset is held. Therefore only one objset
466 * can be held at a time.
469 dmu_objset_hold(const char *name
, void *tag
, objset_t
**osp
)
475 err
= dsl_pool_hold(name
, tag
, &dp
);
478 err
= dsl_dataset_hold(dp
, name
, tag
, &ds
);
480 dsl_pool_rele(dp
, tag
);
484 err
= dmu_objset_from_ds(ds
, osp
);
486 dsl_dataset_rele(ds
, tag
);
487 dsl_pool_rele(dp
, tag
);
494 * dsl_pool must not be held when this is called.
495 * Upon successful return, there will be a longhold on the dataset,
496 * and the dsl_pool will not be held.
499 dmu_objset_own(const char *name
, dmu_objset_type_t type
,
500 boolean_t readonly
, void *tag
, objset_t
**osp
)
506 err
= dsl_pool_hold(name
, FTAG
, &dp
);
509 err
= dsl_dataset_own(dp
, name
, tag
, &ds
);
511 dsl_pool_rele(dp
, FTAG
);
515 err
= dmu_objset_from_ds(ds
, osp
);
516 dsl_pool_rele(dp
, FTAG
);
518 dsl_dataset_disown(ds
, tag
);
519 } else if (type
!= DMU_OST_ANY
&& type
!= (*osp
)->os_phys
->os_type
) {
520 dsl_dataset_disown(ds
, tag
);
521 return (SET_ERROR(EINVAL
));
522 } else if (!readonly
&& dsl_dataset_is_snapshot(ds
)) {
523 dsl_dataset_disown(ds
, tag
);
524 return (SET_ERROR(EROFS
));
530 dmu_objset_rele(objset_t
*os
, void *tag
)
532 dsl_pool_t
*dp
= dmu_objset_pool(os
);
533 dsl_dataset_rele(os
->os_dsl_dataset
, tag
);
534 dsl_pool_rele(dp
, tag
);
538 * When we are called, os MUST refer to an objset associated with a dataset
539 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
540 * == tag. We will then release and reacquire ownership of the dataset while
541 * holding the pool config_rwlock to avoid intervening namespace or ownership
544 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
545 * release the hold on its dataset and acquire a new one on the dataset of the
546 * same name so that it can be partially torn down and reconstructed.
549 dmu_objset_refresh_ownership(objset_t
*os
, void *tag
)
552 dsl_dataset_t
*ds
, *newds
;
553 char name
[MAXNAMELEN
];
555 ds
= os
->os_dsl_dataset
;
556 VERIFY3P(ds
, !=, NULL
);
557 VERIFY3P(ds
->ds_owner
, ==, tag
);
558 VERIFY(dsl_dataset_long_held(ds
));
560 dsl_dataset_name(ds
, name
);
561 dp
= dmu_objset_pool(os
);
562 dsl_pool_config_enter(dp
, FTAG
);
563 dmu_objset_disown(os
, tag
);
564 VERIFY0(dsl_dataset_own(dp
, name
, tag
, &newds
));
565 VERIFY3P(newds
, ==, os
->os_dsl_dataset
);
566 dsl_pool_config_exit(dp
, FTAG
);
570 dmu_objset_disown(objset_t
*os
, void *tag
)
572 dsl_dataset_disown(os
->os_dsl_dataset
, tag
);
576 dmu_objset_evict_dbufs(objset_t
*os
)
580 mutex_enter(&os
->os_lock
);
582 /* process the mdn last, since the other dnodes have holds on it */
583 list_remove(&os
->os_dnodes
, DMU_META_DNODE(os
));
584 list_insert_tail(&os
->os_dnodes
, DMU_META_DNODE(os
));
587 * Find the first dnode with holds. We have to do this dance
588 * because dnode_add_ref() only works if you already have a
589 * hold. If there are no holds then it has no dbufs so OK to
592 for (dn
= list_head(&os
->os_dnodes
);
593 dn
&& !dnode_add_ref(dn
, FTAG
);
594 dn
= list_next(&os
->os_dnodes
, dn
))
598 dnode_t
*next_dn
= dn
;
601 next_dn
= list_next(&os
->os_dnodes
, next_dn
);
602 } while (next_dn
&& !dnode_add_ref(next_dn
, FTAG
));
604 mutex_exit(&os
->os_lock
);
605 dnode_evict_dbufs(dn
);
606 dnode_rele(dn
, FTAG
);
607 mutex_enter(&os
->os_lock
);
610 mutex_exit(&os
->os_lock
);
614 dmu_objset_evict(objset_t
*os
)
618 dsl_dataset_t
*ds
= os
->os_dsl_dataset
;
620 for (t
= 0; t
< TXG_SIZE
; t
++)
621 ASSERT(!dmu_objset_is_dirty(os
, t
));
624 if (!dsl_dataset_is_snapshot(ds
)) {
625 VERIFY0(dsl_prop_unregister(ds
,
626 zfs_prop_to_name(ZFS_PROP_CHECKSUM
),
627 checksum_changed_cb
, os
));
628 VERIFY0(dsl_prop_unregister(ds
,
629 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
630 compression_changed_cb
, os
));
631 VERIFY0(dsl_prop_unregister(ds
,
632 zfs_prop_to_name(ZFS_PROP_COPIES
),
633 copies_changed_cb
, os
));
634 VERIFY0(dsl_prop_unregister(ds
,
635 zfs_prop_to_name(ZFS_PROP_DEDUP
),
636 dedup_changed_cb
, os
));
637 VERIFY0(dsl_prop_unregister(ds
,
638 zfs_prop_to_name(ZFS_PROP_LOGBIAS
),
639 logbias_changed_cb
, os
));
640 VERIFY0(dsl_prop_unregister(ds
,
641 zfs_prop_to_name(ZFS_PROP_SYNC
),
642 sync_changed_cb
, os
));
643 VERIFY0(dsl_prop_unregister(ds
,
644 zfs_prop_to_name(ZFS_PROP_REDUNDANT_METADATA
),
645 redundant_metadata_changed_cb
, os
));
647 VERIFY0(dsl_prop_unregister(ds
,
648 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE
),
649 primary_cache_changed_cb
, os
));
650 VERIFY0(dsl_prop_unregister(ds
,
651 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE
),
652 secondary_cache_changed_cb
, os
));
658 dmu_objset_evict_dbufs(os
);
660 dnode_special_close(&os
->os_meta_dnode
);
661 if (DMU_USERUSED_DNODE(os
)) {
662 dnode_special_close(&os
->os_userused_dnode
);
663 dnode_special_close(&os
->os_groupused_dnode
);
665 zil_free(os
->os_zil
);
667 ASSERT3P(list_head(&os
->os_dnodes
), ==, NULL
);
669 VERIFY(arc_buf_remove_ref(os
->os_phys_buf
, &os
->os_phys_buf
));
672 * This is a barrier to prevent the objset from going away in
673 * dnode_move() until we can safely ensure that the objset is still in
674 * use. We consider the objset valid before the barrier and invalid
677 rw_enter(&os_lock
, RW_READER
);
680 mutex_destroy(&os
->os_lock
);
681 mutex_destroy(&os
->os_obj_lock
);
682 mutex_destroy(&os
->os_user_ptr_lock
);
683 kmem_free(os
, sizeof (objset_t
));
687 dmu_objset_snap_cmtime(objset_t
*os
)
689 return (dsl_dir_snap_cmtime(os
->os_dsl_dataset
->ds_dir
));
692 /* called from dsl for meta-objset */
694 dmu_objset_create_impl(spa_t
*spa
, dsl_dataset_t
*ds
, blkptr_t
*bp
,
695 dmu_objset_type_t type
, dmu_tx_t
*tx
)
700 ASSERT(dmu_tx_is_syncing(tx
));
703 VERIFY0(dmu_objset_from_ds(ds
, &os
));
705 VERIFY0(dmu_objset_open_impl(spa
, NULL
, bp
, &os
));
707 mdn
= DMU_META_DNODE(os
);
709 dnode_allocate(mdn
, DMU_OT_DNODE
, 1 << DNODE_BLOCK_SHIFT
,
710 DN_MAX_INDBLKSHIFT
, DMU_OT_NONE
, 0, tx
);
713 * We don't want to have to increase the meta-dnode's nlevels
714 * later, because then we could do it in quescing context while
715 * we are also accessing it in open context.
717 * This precaution is not necessary for the MOS (ds == NULL),
718 * because the MOS is only updated in syncing context.
719 * This is most fortunate: the MOS is the only objset that
720 * needs to be synced multiple times as spa_sync() iterates
721 * to convergence, so minimizing its dn_nlevels matters.
727 * Determine the number of levels necessary for the meta-dnode
728 * to contain DN_MAX_OBJECT dnodes.
730 while ((uint64_t)mdn
->dn_nblkptr
<< (mdn
->dn_datablkshift
+
731 (levels
- 1) * (mdn
->dn_indblkshift
- SPA_BLKPTRSHIFT
)) <
732 DN_MAX_OBJECT
* sizeof (dnode_phys_t
))
735 mdn
->dn_next_nlevels
[tx
->tx_txg
& TXG_MASK
] =
736 mdn
->dn_nlevels
= levels
;
739 ASSERT(type
!= DMU_OST_NONE
);
740 ASSERT(type
!= DMU_OST_ANY
);
741 ASSERT(type
< DMU_OST_NUMTYPES
);
742 os
->os_phys
->os_type
= type
;
743 if (dmu_objset_userused_enabled(os
)) {
744 os
->os_phys
->os_flags
|= OBJSET_FLAG_USERACCOUNTING_COMPLETE
;
745 os
->os_flags
= os
->os_phys
->os_flags
;
748 dsl_dataset_dirty(ds
, tx
);
753 typedef struct dmu_objset_create_arg
{
754 const char *doca_name
;
756 void (*doca_userfunc
)(objset_t
*os
, void *arg
,
757 cred_t
*cr
, dmu_tx_t
*tx
);
759 dmu_objset_type_t doca_type
;
761 } dmu_objset_create_arg_t
;
765 dmu_objset_create_check(void *arg
, dmu_tx_t
*tx
)
767 dmu_objset_create_arg_t
*doca
= arg
;
768 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
773 if (strchr(doca
->doca_name
, '@') != NULL
)
774 return (SET_ERROR(EINVAL
));
776 error
= dsl_dir_hold(dp
, doca
->doca_name
, FTAG
, &pdd
, &tail
);
780 dsl_dir_rele(pdd
, FTAG
);
781 return (SET_ERROR(EEXIST
));
783 dsl_dir_rele(pdd
, FTAG
);
789 dmu_objset_create_sync(void *arg
, dmu_tx_t
*tx
)
791 dmu_objset_create_arg_t
*doca
= arg
;
792 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
800 VERIFY0(dsl_dir_hold(dp
, doca
->doca_name
, FTAG
, &pdd
, &tail
));
802 obj
= dsl_dataset_create_sync(pdd
, tail
, NULL
, doca
->doca_flags
,
803 doca
->doca_cred
, tx
);
805 VERIFY0(dsl_dataset_hold_obj(pdd
->dd_pool
, obj
, FTAG
, &ds
));
806 bp
= dsl_dataset_get_blkptr(ds
);
807 os
= dmu_objset_create_impl(pdd
->dd_pool
->dp_spa
,
808 ds
, bp
, doca
->doca_type
, tx
);
810 if (doca
->doca_userfunc
!= NULL
) {
811 doca
->doca_userfunc(os
, doca
->doca_userarg
,
812 doca
->doca_cred
, tx
);
815 spa_history_log_internal_ds(ds
, "create", tx
, "");
816 dsl_dataset_rele(ds
, FTAG
);
817 dsl_dir_rele(pdd
, FTAG
);
821 dmu_objset_create(const char *name
, dmu_objset_type_t type
, uint64_t flags
,
822 void (*func
)(objset_t
*os
, void *arg
, cred_t
*cr
, dmu_tx_t
*tx
), void *arg
)
824 dmu_objset_create_arg_t doca
;
826 doca
.doca_name
= name
;
827 doca
.doca_cred
= CRED();
828 doca
.doca_flags
= flags
;
829 doca
.doca_userfunc
= func
;
830 doca
.doca_userarg
= arg
;
831 doca
.doca_type
= type
;
833 return (dsl_sync_task(name
,
834 dmu_objset_create_check
, dmu_objset_create_sync
, &doca
, 5));
837 typedef struct dmu_objset_clone_arg
{
838 const char *doca_clone
;
839 const char *doca_origin
;
841 } dmu_objset_clone_arg_t
;
845 dmu_objset_clone_check(void *arg
, dmu_tx_t
*tx
)
847 dmu_objset_clone_arg_t
*doca
= arg
;
851 dsl_dataset_t
*origin
;
852 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
854 if (strchr(doca
->doca_clone
, '@') != NULL
)
855 return (SET_ERROR(EINVAL
));
857 error
= dsl_dir_hold(dp
, doca
->doca_clone
, FTAG
, &pdd
, &tail
);
861 dsl_dir_rele(pdd
, FTAG
);
862 return (SET_ERROR(EEXIST
));
864 /* You can't clone across pools. */
865 if (pdd
->dd_pool
!= dp
) {
866 dsl_dir_rele(pdd
, FTAG
);
867 return (SET_ERROR(EXDEV
));
869 dsl_dir_rele(pdd
, FTAG
);
871 error
= dsl_dataset_hold(dp
, doca
->doca_origin
, FTAG
, &origin
);
875 /* You can't clone across pools. */
876 if (origin
->ds_dir
->dd_pool
!= dp
) {
877 dsl_dataset_rele(origin
, FTAG
);
878 return (SET_ERROR(EXDEV
));
881 /* You can only clone snapshots, not the head datasets. */
882 if (!dsl_dataset_is_snapshot(origin
)) {
883 dsl_dataset_rele(origin
, FTAG
);
884 return (SET_ERROR(EINVAL
));
886 dsl_dataset_rele(origin
, FTAG
);
892 dmu_objset_clone_sync(void *arg
, dmu_tx_t
*tx
)
894 dmu_objset_clone_arg_t
*doca
= arg
;
895 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
898 dsl_dataset_t
*origin
, *ds
;
900 char namebuf
[MAXNAMELEN
];
902 VERIFY0(dsl_dir_hold(dp
, doca
->doca_clone
, FTAG
, &pdd
, &tail
));
903 VERIFY0(dsl_dataset_hold(dp
, doca
->doca_origin
, FTAG
, &origin
));
905 obj
= dsl_dataset_create_sync(pdd
, tail
, origin
, 0,
906 doca
->doca_cred
, tx
);
908 VERIFY0(dsl_dataset_hold_obj(pdd
->dd_pool
, obj
, FTAG
, &ds
));
909 dsl_dataset_name(origin
, namebuf
);
910 spa_history_log_internal_ds(ds
, "clone", tx
,
911 "origin=%s (%llu)", namebuf
, origin
->ds_object
);
912 dsl_dataset_rele(ds
, FTAG
);
913 dsl_dataset_rele(origin
, FTAG
);
914 dsl_dir_rele(pdd
, FTAG
);
918 dmu_objset_clone(const char *clone
, const char *origin
)
920 dmu_objset_clone_arg_t doca
;
922 doca
.doca_clone
= clone
;
923 doca
.doca_origin
= origin
;
924 doca
.doca_cred
= CRED();
926 return (dsl_sync_task(clone
,
927 dmu_objset_clone_check
, dmu_objset_clone_sync
, &doca
, 5));
931 dmu_objset_snapshot_one(const char *fsname
, const char *snapname
)
934 char *longsnap
= kmem_asprintf("%s@%s", fsname
, snapname
);
935 nvlist_t
*snaps
= fnvlist_alloc();
937 fnvlist_add_boolean(snaps
, longsnap
);
939 err
= dsl_dataset_snapshot(snaps
, NULL
, NULL
);
945 dmu_objset_sync_dnodes(list_t
*list
, list_t
*newlist
, dmu_tx_t
*tx
)
949 while ((dn
= list_head(list
))) {
950 ASSERT(dn
->dn_object
!= DMU_META_DNODE_OBJECT
);
951 ASSERT(dn
->dn_dbuf
->db_data_pending
);
953 * Initialize dn_zio outside dnode_sync() because the
954 * meta-dnode needs to set it ouside dnode_sync().
956 dn
->dn_zio
= dn
->dn_dbuf
->db_data_pending
->dr_zio
;
959 ASSERT3U(dn
->dn_nlevels
, <=, DN_MAX_LEVELS
);
960 list_remove(list
, dn
);
963 (void) dnode_add_ref(dn
, newlist
);
964 list_insert_tail(newlist
, dn
);
973 dmu_objset_write_ready(zio_t
*zio
, arc_buf_t
*abuf
, void *arg
)
977 blkptr_t
*bp
= zio
->io_bp
;
979 dnode_phys_t
*dnp
= &os
->os_phys
->os_meta_dnode
;
981 ASSERT(!BP_IS_EMBEDDED(bp
));
982 ASSERT3P(bp
, ==, os
->os_rootbp
);
983 ASSERT3U(BP_GET_TYPE(bp
), ==, DMU_OT_OBJSET
);
984 ASSERT0(BP_GET_LEVEL(bp
));
987 * Update rootbp fill count: it should be the number of objects
988 * allocated in the object set (not counting the "special"
989 * objects that are stored in the objset_phys_t -- the meta
990 * dnode and user/group accounting objects).
993 for (i
= 0; i
< dnp
->dn_nblkptr
; i
++)
994 bp
->blk_fill
+= BP_GET_FILL(&dnp
->dn_blkptr
[i
]);
999 dmu_objset_write_done(zio_t
*zio
, arc_buf_t
*abuf
, void *arg
)
1001 blkptr_t
*bp
= zio
->io_bp
;
1002 blkptr_t
*bp_orig
= &zio
->io_bp_orig
;
1005 if (zio
->io_flags
& ZIO_FLAG_IO_REWRITE
) {
1006 ASSERT(BP_EQUAL(bp
, bp_orig
));
1008 dsl_dataset_t
*ds
= os
->os_dsl_dataset
;
1009 dmu_tx_t
*tx
= os
->os_synctx
;
1011 (void) dsl_dataset_block_kill(ds
, bp_orig
, tx
, B_TRUE
);
1012 dsl_dataset_block_born(ds
, bp
, tx
);
1016 /* called from dsl */
1018 dmu_objset_sync(objset_t
*os
, zio_t
*pio
, dmu_tx_t
*tx
)
1025 list_t
*newlist
= NULL
;
1026 dbuf_dirty_record_t
*dr
;
1028 dprintf_ds(os
->os_dsl_dataset
, "txg=%llu\n", tx
->tx_txg
);
1030 ASSERT(dmu_tx_is_syncing(tx
));
1031 /* XXX the write_done callback should really give us the tx... */
1034 if (os
->os_dsl_dataset
== NULL
) {
1036 * This is the MOS. If we have upgraded,
1037 * spa_max_replication() could change, so reset
1040 os
->os_copies
= spa_max_replication(os
->os_spa
);
1044 * Create the root block IO
1046 SET_BOOKMARK(&zb
, os
->os_dsl_dataset
?
1047 os
->os_dsl_dataset
->ds_object
: DMU_META_OBJSET
,
1048 ZB_ROOT_OBJECT
, ZB_ROOT_LEVEL
, ZB_ROOT_BLKID
);
1049 arc_release(os
->os_phys_buf
, &os
->os_phys_buf
);
1051 dmu_write_policy(os
, NULL
, 0, 0, &zp
);
1053 zio
= arc_write(pio
, os
->os_spa
, tx
->tx_txg
,
1054 os
->os_rootbp
, os
->os_phys_buf
, DMU_OS_IS_L2CACHEABLE(os
),
1055 DMU_OS_IS_L2COMPRESSIBLE(os
), &zp
, dmu_objset_write_ready
,
1056 NULL
, dmu_objset_write_done
, os
, ZIO_PRIORITY_ASYNC_WRITE
,
1057 ZIO_FLAG_MUSTSUCCEED
, &zb
);
1060 * Sync special dnodes - the parent IO for the sync is the root block
1062 DMU_META_DNODE(os
)->dn_zio
= zio
;
1063 dnode_sync(DMU_META_DNODE(os
), tx
);
1065 os
->os_phys
->os_flags
= os
->os_flags
;
1067 if (DMU_USERUSED_DNODE(os
) &&
1068 DMU_USERUSED_DNODE(os
)->dn_type
!= DMU_OT_NONE
) {
1069 DMU_USERUSED_DNODE(os
)->dn_zio
= zio
;
1070 dnode_sync(DMU_USERUSED_DNODE(os
), tx
);
1071 DMU_GROUPUSED_DNODE(os
)->dn_zio
= zio
;
1072 dnode_sync(DMU_GROUPUSED_DNODE(os
), tx
);
1075 txgoff
= tx
->tx_txg
& TXG_MASK
;
1077 if (dmu_objset_userused_enabled(os
)) {
1078 newlist
= &os
->os_synced_dnodes
;
1080 * We must create the list here because it uses the
1081 * dn_dirty_link[] of this txg.
1083 list_create(newlist
, sizeof (dnode_t
),
1084 offsetof(dnode_t
, dn_dirty_link
[txgoff
]));
1087 dmu_objset_sync_dnodes(&os
->os_free_dnodes
[txgoff
], newlist
, tx
);
1088 dmu_objset_sync_dnodes(&os
->os_dirty_dnodes
[txgoff
], newlist
, tx
);
1090 list
= &DMU_META_DNODE(os
)->dn_dirty_records
[txgoff
];
1091 while ((dr
= list_head(list
))) {
1092 ASSERT0(dr
->dr_dbuf
->db_level
);
1093 list_remove(list
, dr
);
1095 zio_nowait(dr
->dr_zio
);
1098 * Free intent log blocks up to this tx.
1100 zil_sync(os
->os_zil
, tx
);
1101 os
->os_phys
->os_zil_header
= os
->os_zil_header
;
1106 dmu_objset_is_dirty(objset_t
*os
, uint64_t txg
)
1108 return (!list_is_empty(&os
->os_dirty_dnodes
[txg
& TXG_MASK
]) ||
1109 !list_is_empty(&os
->os_free_dnodes
[txg
& TXG_MASK
]));
1112 static objset_used_cb_t
*used_cbs
[DMU_OST_NUMTYPES
];
1115 dmu_objset_register_type(dmu_objset_type_t ost
, objset_used_cb_t
*cb
)
1121 dmu_objset_userused_enabled(objset_t
*os
)
1123 return (spa_version(os
->os_spa
) >= SPA_VERSION_USERSPACE
&&
1124 used_cbs
[os
->os_phys
->os_type
] != NULL
&&
1125 DMU_USERUSED_DNODE(os
) != NULL
);
1129 do_userquota_update(objset_t
*os
, uint64_t used
, uint64_t flags
,
1130 uint64_t user
, uint64_t group
, boolean_t subtract
, dmu_tx_t
*tx
)
1132 if ((flags
& DNODE_FLAG_USERUSED_ACCOUNTED
)) {
1133 int64_t delta
= DNODE_SIZE
+ used
;
1136 VERIFY3U(0, ==, zap_increment_int(os
, DMU_USERUSED_OBJECT
,
1138 VERIFY3U(0, ==, zap_increment_int(os
, DMU_GROUPUSED_OBJECT
,
1144 dmu_objset_do_userquota_updates(objset_t
*os
, dmu_tx_t
*tx
)
1147 list_t
*list
= &os
->os_synced_dnodes
;
1149 ASSERT(list_head(list
) == NULL
|| dmu_objset_userused_enabled(os
));
1151 while ((dn
= list_head(list
))) {
1153 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn
->dn_object
));
1154 ASSERT(dn
->dn_phys
->dn_type
== DMU_OT_NONE
||
1155 dn
->dn_phys
->dn_flags
&
1156 DNODE_FLAG_USERUSED_ACCOUNTED
);
1158 /* Allocate the user/groupused objects if necessary. */
1159 if (DMU_USERUSED_DNODE(os
)->dn_type
== DMU_OT_NONE
) {
1160 VERIFY(0 == zap_create_claim(os
,
1161 DMU_USERUSED_OBJECT
,
1162 DMU_OT_USERGROUP_USED
, DMU_OT_NONE
, 0, tx
));
1163 VERIFY(0 == zap_create_claim(os
,
1164 DMU_GROUPUSED_OBJECT
,
1165 DMU_OT_USERGROUP_USED
, DMU_OT_NONE
, 0, tx
));
1169 * We intentionally modify the zap object even if the
1170 * net delta is zero. Otherwise
1171 * the block of the zap obj could be shared between
1172 * datasets but need to be different between them after
1176 flags
= dn
->dn_id_flags
;
1178 if (flags
& DN_ID_OLD_EXIST
) {
1179 do_userquota_update(os
, dn
->dn_oldused
, dn
->dn_oldflags
,
1180 dn
->dn_olduid
, dn
->dn_oldgid
, B_TRUE
, tx
);
1182 if (flags
& DN_ID_NEW_EXIST
) {
1183 do_userquota_update(os
, DN_USED_BYTES(dn
->dn_phys
),
1184 dn
->dn_phys
->dn_flags
, dn
->dn_newuid
,
1185 dn
->dn_newgid
, B_FALSE
, tx
);
1188 mutex_enter(&dn
->dn_mtx
);
1190 dn
->dn_oldflags
= 0;
1191 if (dn
->dn_id_flags
& DN_ID_NEW_EXIST
) {
1192 dn
->dn_olduid
= dn
->dn_newuid
;
1193 dn
->dn_oldgid
= dn
->dn_newgid
;
1194 dn
->dn_id_flags
|= DN_ID_OLD_EXIST
;
1195 if (dn
->dn_bonuslen
== 0)
1196 dn
->dn_id_flags
|= DN_ID_CHKED_SPILL
;
1198 dn
->dn_id_flags
|= DN_ID_CHKED_BONUS
;
1200 dn
->dn_id_flags
&= ~(DN_ID_NEW_EXIST
);
1201 mutex_exit(&dn
->dn_mtx
);
1203 list_remove(list
, dn
);
1204 dnode_rele(dn
, list
);
1209 * Returns a pointer to data to find uid/gid from
1211 * If a dirty record for transaction group that is syncing can't
1212 * be found then NULL is returned. In the NULL case it is assumed
1213 * the uid/gid aren't changing.
1216 dmu_objset_userquota_find_data(dmu_buf_impl_t
*db
, dmu_tx_t
*tx
)
1218 dbuf_dirty_record_t
*dr
, **drp
;
1221 if (db
->db_dirtycnt
== 0)
1222 return (db
->db
.db_data
); /* Nothing is changing */
1224 for (drp
= &db
->db_last_dirty
; (dr
= *drp
) != NULL
; drp
= &dr
->dr_next
)
1225 if (dr
->dr_txg
== tx
->tx_txg
)
1233 DB_DNODE_ENTER(dr
->dr_dbuf
);
1234 dn
= DB_DNODE(dr
->dr_dbuf
);
1236 if (dn
->dn_bonuslen
== 0 &&
1237 dr
->dr_dbuf
->db_blkid
== DMU_SPILL_BLKID
)
1238 data
= dr
->dt
.dl
.dr_data
->b_data
;
1240 data
= dr
->dt
.dl
.dr_data
;
1242 DB_DNODE_EXIT(dr
->dr_dbuf
);
1249 dmu_objset_userquota_get_ids(dnode_t
*dn
, boolean_t before
, dmu_tx_t
*tx
)
1251 objset_t
*os
= dn
->dn_objset
;
1253 dmu_buf_impl_t
*db
= NULL
;
1254 uint64_t *user
= NULL
;
1255 uint64_t *group
= NULL
;
1256 int flags
= dn
->dn_id_flags
;
1258 boolean_t have_spill
= B_FALSE
;
1260 if (!dmu_objset_userused_enabled(dn
->dn_objset
))
1263 if (before
&& (flags
& (DN_ID_CHKED_BONUS
|DN_ID_OLD_EXIST
|
1264 DN_ID_CHKED_SPILL
)))
1267 if (before
&& dn
->dn_bonuslen
!= 0)
1268 data
= DN_BONUS(dn
->dn_phys
);
1269 else if (!before
&& dn
->dn_bonuslen
!= 0) {
1272 mutex_enter(&db
->db_mtx
);
1273 data
= dmu_objset_userquota_find_data(db
, tx
);
1275 data
= DN_BONUS(dn
->dn_phys
);
1277 } else if (dn
->dn_bonuslen
== 0 && dn
->dn_bonustype
== DMU_OT_SA
) {
1280 if (RW_WRITE_HELD(&dn
->dn_struct_rwlock
))
1281 rf
|= DB_RF_HAVESTRUCT
;
1282 error
= dmu_spill_hold_by_dnode(dn
,
1283 rf
| DB_RF_MUST_SUCCEED
,
1284 FTAG
, (dmu_buf_t
**)&db
);
1286 mutex_enter(&db
->db_mtx
);
1287 data
= (before
) ? db
->db
.db_data
:
1288 dmu_objset_userquota_find_data(db
, tx
);
1289 have_spill
= B_TRUE
;
1291 mutex_enter(&dn
->dn_mtx
);
1292 dn
->dn_id_flags
|= DN_ID_CHKED_BONUS
;
1293 mutex_exit(&dn
->dn_mtx
);
1299 user
= &dn
->dn_olduid
;
1300 group
= &dn
->dn_oldgid
;
1302 user
= &dn
->dn_newuid
;
1303 group
= &dn
->dn_newgid
;
1307 * Must always call the callback in case the object
1308 * type has changed and that type isn't an object type to track
1310 error
= used_cbs
[os
->os_phys
->os_type
](dn
->dn_bonustype
, data
,
1314 * Preserve existing uid/gid when the callback can't determine
1315 * what the new uid/gid are and the callback returned EEXIST.
1316 * The EEXIST error tells us to just use the existing uid/gid.
1317 * If we don't know what the old values are then just assign
1318 * them to 0, since that is a new file being created.
1320 if (!before
&& data
== NULL
&& error
== EEXIST
) {
1321 if (flags
& DN_ID_OLD_EXIST
) {
1322 dn
->dn_newuid
= dn
->dn_olduid
;
1323 dn
->dn_newgid
= dn
->dn_oldgid
;
1332 mutex_exit(&db
->db_mtx
);
1334 mutex_enter(&dn
->dn_mtx
);
1335 if (error
== 0 && before
)
1336 dn
->dn_id_flags
|= DN_ID_OLD_EXIST
;
1337 if (error
== 0 && !before
)
1338 dn
->dn_id_flags
|= DN_ID_NEW_EXIST
;
1341 dn
->dn_id_flags
|= DN_ID_CHKED_SPILL
;
1343 dn
->dn_id_flags
|= DN_ID_CHKED_BONUS
;
1345 mutex_exit(&dn
->dn_mtx
);
1347 dmu_buf_rele((dmu_buf_t
*)db
, FTAG
);
1351 dmu_objset_userspace_present(objset_t
*os
)
1353 return (os
->os_phys
->os_flags
&
1354 OBJSET_FLAG_USERACCOUNTING_COMPLETE
);
1358 dmu_objset_userspace_upgrade(objset_t
*os
)
1363 if (dmu_objset_userspace_present(os
))
1365 if (!dmu_objset_userused_enabled(os
))
1366 return (SET_ERROR(ENOTSUP
));
1367 if (dmu_objset_is_snapshot(os
))
1368 return (SET_ERROR(EINVAL
));
1371 * We simply need to mark every object dirty, so that it will be
1372 * synced out and now accounted. If this is called
1373 * concurrently, or if we already did some work before crashing,
1374 * that's fine, since we track each object's accounted state
1378 for (obj
= 0; err
== 0; err
= dmu_object_next(os
, &obj
, FALSE
, 0)) {
1383 if (issig(JUSTLOOKING
) && issig(FORREAL
))
1384 return (SET_ERROR(EINTR
));
1386 objerr
= dmu_bonus_hold(os
, obj
, FTAG
, &db
);
1389 tx
= dmu_tx_create(os
);
1390 dmu_tx_hold_bonus(tx
, obj
);
1391 objerr
= dmu_tx_assign(tx
, TXG_WAIT
);
1396 dmu_buf_will_dirty(db
, tx
);
1397 dmu_buf_rele(db
, FTAG
);
1401 os
->os_flags
|= OBJSET_FLAG_USERACCOUNTING_COMPLETE
;
1402 txg_wait_synced(dmu_objset_pool(os
), 0);
1407 dmu_objset_space(objset_t
*os
, uint64_t *refdbytesp
, uint64_t *availbytesp
,
1408 uint64_t *usedobjsp
, uint64_t *availobjsp
)
1410 dsl_dataset_space(os
->os_dsl_dataset
, refdbytesp
, availbytesp
,
1411 usedobjsp
, availobjsp
);
1415 dmu_objset_fsid_guid(objset_t
*os
)
1417 return (dsl_dataset_fsid_guid(os
->os_dsl_dataset
));
1421 dmu_objset_fast_stat(objset_t
*os
, dmu_objset_stats_t
*stat
)
1423 stat
->dds_type
= os
->os_phys
->os_type
;
1424 if (os
->os_dsl_dataset
)
1425 dsl_dataset_fast_stat(os
->os_dsl_dataset
, stat
);
1429 dmu_objset_stats(objset_t
*os
, nvlist_t
*nv
)
1431 ASSERT(os
->os_dsl_dataset
||
1432 os
->os_phys
->os_type
== DMU_OST_META
);
1434 if (os
->os_dsl_dataset
!= NULL
)
1435 dsl_dataset_stats(os
->os_dsl_dataset
, nv
);
1437 dsl_prop_nvlist_add_uint64(nv
, ZFS_PROP_TYPE
,
1438 os
->os_phys
->os_type
);
1439 dsl_prop_nvlist_add_uint64(nv
, ZFS_PROP_USERACCOUNTING
,
1440 dmu_objset_userspace_present(os
));
1444 dmu_objset_is_snapshot(objset_t
*os
)
1446 if (os
->os_dsl_dataset
!= NULL
)
1447 return (dsl_dataset_is_snapshot(os
->os_dsl_dataset
));
1453 dmu_snapshot_realname(objset_t
*os
, char *name
, char *real
, int maxlen
,
1454 boolean_t
*conflict
)
1456 dsl_dataset_t
*ds
= os
->os_dsl_dataset
;
1459 if (ds
->ds_phys
->ds_snapnames_zapobj
== 0)
1460 return (SET_ERROR(ENOENT
));
1462 return (zap_lookup_norm(ds
->ds_dir
->dd_pool
->dp_meta_objset
,
1463 ds
->ds_phys
->ds_snapnames_zapobj
, name
, 8, 1, &ignored
, MT_FIRST
,
1464 real
, maxlen
, conflict
));
1468 dmu_snapshot_list_next(objset_t
*os
, int namelen
, char *name
,
1469 uint64_t *idp
, uint64_t *offp
, boolean_t
*case_conflict
)
1471 dsl_dataset_t
*ds
= os
->os_dsl_dataset
;
1472 zap_cursor_t cursor
;
1473 zap_attribute_t attr
;
1475 ASSERT(dsl_pool_config_held(dmu_objset_pool(os
)));
1477 if (ds
->ds_phys
->ds_snapnames_zapobj
== 0)
1478 return (SET_ERROR(ENOENT
));
1480 zap_cursor_init_serialized(&cursor
,
1481 ds
->ds_dir
->dd_pool
->dp_meta_objset
,
1482 ds
->ds_phys
->ds_snapnames_zapobj
, *offp
);
1484 if (zap_cursor_retrieve(&cursor
, &attr
) != 0) {
1485 zap_cursor_fini(&cursor
);
1486 return (SET_ERROR(ENOENT
));
1489 if (strlen(attr
.za_name
) + 1 > namelen
) {
1490 zap_cursor_fini(&cursor
);
1491 return (SET_ERROR(ENAMETOOLONG
));
1494 (void) strcpy(name
, attr
.za_name
);
1496 *idp
= attr
.za_first_integer
;
1498 *case_conflict
= attr
.za_normalization_conflict
;
1499 zap_cursor_advance(&cursor
);
1500 *offp
= zap_cursor_serialize(&cursor
);
1501 zap_cursor_fini(&cursor
);
1507 dmu_snapshot_lookup(objset_t
*os
, const char *name
, uint64_t *value
)
1509 return (dsl_dataset_snap_lookup(os
->os_dsl_dataset
, name
, value
));
1513 dmu_dir_list_next(objset_t
*os
, int namelen
, char *name
,
1514 uint64_t *idp
, uint64_t *offp
)
1516 dsl_dir_t
*dd
= os
->os_dsl_dataset
->ds_dir
;
1517 zap_cursor_t cursor
;
1518 zap_attribute_t attr
;
1520 /* there is no next dir on a snapshot! */
1521 if (os
->os_dsl_dataset
->ds_object
!=
1522 dd
->dd_phys
->dd_head_dataset_obj
)
1523 return (SET_ERROR(ENOENT
));
1525 zap_cursor_init_serialized(&cursor
,
1526 dd
->dd_pool
->dp_meta_objset
,
1527 dd
->dd_phys
->dd_child_dir_zapobj
, *offp
);
1529 if (zap_cursor_retrieve(&cursor
, &attr
) != 0) {
1530 zap_cursor_fini(&cursor
);
1531 return (SET_ERROR(ENOENT
));
1534 if (strlen(attr
.za_name
) + 1 > namelen
) {
1535 zap_cursor_fini(&cursor
);
1536 return (SET_ERROR(ENAMETOOLONG
));
1539 (void) strcpy(name
, attr
.za_name
);
1541 *idp
= attr
.za_first_integer
;
1542 zap_cursor_advance(&cursor
);
1543 *offp
= zap_cursor_serialize(&cursor
);
1544 zap_cursor_fini(&cursor
);
1550 * Find objsets under and including ddobj, call func(ds) on each.
1553 dmu_objset_find_dp(dsl_pool_t
*dp
, uint64_t ddobj
,
1554 int func(dsl_pool_t
*, dsl_dataset_t
*, void *), void *arg
, int flags
)
1559 zap_attribute_t
*attr
;
1563 ASSERT(dsl_pool_config_held(dp
));
1565 err
= dsl_dir_hold_obj(dp
, ddobj
, NULL
, FTAG
, &dd
);
1569 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1570 if (dd
->dd_myname
[0] == '$') {
1571 dsl_dir_rele(dd
, FTAG
);
1575 thisobj
= dd
->dd_phys
->dd_head_dataset_obj
;
1576 attr
= kmem_alloc(sizeof (zap_attribute_t
), KM_PUSHPAGE
);
1579 * Iterate over all children.
1581 if (flags
& DS_FIND_CHILDREN
) {
1582 for (zap_cursor_init(&zc
, dp
->dp_meta_objset
,
1583 dd
->dd_phys
->dd_child_dir_zapobj
);
1584 zap_cursor_retrieve(&zc
, attr
) == 0;
1585 (void) zap_cursor_advance(&zc
)) {
1586 ASSERT3U(attr
->za_integer_length
, ==,
1588 ASSERT3U(attr
->za_num_integers
, ==, 1);
1590 err
= dmu_objset_find_dp(dp
, attr
->za_first_integer
,
1595 zap_cursor_fini(&zc
);
1598 dsl_dir_rele(dd
, FTAG
);
1599 kmem_free(attr
, sizeof (zap_attribute_t
));
1605 * Iterate over all snapshots.
1607 if (flags
& DS_FIND_SNAPSHOTS
) {
1609 err
= dsl_dataset_hold_obj(dp
, thisobj
, FTAG
, &ds
);
1612 uint64_t snapobj
= ds
->ds_phys
->ds_snapnames_zapobj
;
1613 dsl_dataset_rele(ds
, FTAG
);
1615 for (zap_cursor_init(&zc
, dp
->dp_meta_objset
, snapobj
);
1616 zap_cursor_retrieve(&zc
, attr
) == 0;
1617 (void) zap_cursor_advance(&zc
)) {
1618 ASSERT3U(attr
->za_integer_length
, ==,
1620 ASSERT3U(attr
->za_num_integers
, ==, 1);
1622 err
= dsl_dataset_hold_obj(dp
,
1623 attr
->za_first_integer
, FTAG
, &ds
);
1626 err
= func(dp
, ds
, arg
);
1627 dsl_dataset_rele(ds
, FTAG
);
1631 zap_cursor_fini(&zc
);
1635 dsl_dir_rele(dd
, FTAG
);
1636 kmem_free(attr
, sizeof (zap_attribute_t
));
1644 err
= dsl_dataset_hold_obj(dp
, thisobj
, FTAG
, &ds
);
1647 err
= func(dp
, ds
, arg
);
1648 dsl_dataset_rele(ds
, FTAG
);
1653 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
1654 * The dp_config_rwlock must not be held when this is called, and it
1655 * will not be held when the callback is called.
1656 * Therefore this function should only be used when the pool is not changing
1657 * (e.g. in syncing context), or the callback can deal with the possible races.
1660 dmu_objset_find_impl(spa_t
*spa
, const char *name
,
1661 int func(const char *, void *), void *arg
, int flags
)
1664 dsl_pool_t
*dp
= spa_get_dsl(spa
);
1667 zap_attribute_t
*attr
;
1672 dsl_pool_config_enter(dp
, FTAG
);
1674 err
= dsl_dir_hold(dp
, name
, FTAG
, &dd
, NULL
);
1676 dsl_pool_config_exit(dp
, FTAG
);
1680 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1681 if (dd
->dd_myname
[0] == '$') {
1682 dsl_dir_rele(dd
, FTAG
);
1683 dsl_pool_config_exit(dp
, FTAG
);
1687 thisobj
= dd
->dd_phys
->dd_head_dataset_obj
;
1688 attr
= kmem_alloc(sizeof (zap_attribute_t
), KM_PUSHPAGE
);
1691 * Iterate over all children.
1693 if (flags
& DS_FIND_CHILDREN
) {
1694 for (zap_cursor_init(&zc
, dp
->dp_meta_objset
,
1695 dd
->dd_phys
->dd_child_dir_zapobj
);
1696 zap_cursor_retrieve(&zc
, attr
) == 0;
1697 (void) zap_cursor_advance(&zc
)) {
1698 ASSERT3U(attr
->za_integer_length
, ==,
1700 ASSERT3U(attr
->za_num_integers
, ==, 1);
1702 child
= kmem_asprintf("%s/%s", name
, attr
->za_name
);
1703 dsl_pool_config_exit(dp
, FTAG
);
1704 err
= dmu_objset_find_impl(spa
, child
,
1706 dsl_pool_config_enter(dp
, FTAG
);
1711 zap_cursor_fini(&zc
);
1714 dsl_dir_rele(dd
, FTAG
);
1715 dsl_pool_config_exit(dp
, FTAG
);
1716 kmem_free(attr
, sizeof (zap_attribute_t
));
1722 * Iterate over all snapshots.
1724 if (flags
& DS_FIND_SNAPSHOTS
) {
1725 err
= dsl_dataset_hold_obj(dp
, thisobj
, FTAG
, &ds
);
1728 uint64_t snapobj
= ds
->ds_phys
->ds_snapnames_zapobj
;
1729 dsl_dataset_rele(ds
, FTAG
);
1731 for (zap_cursor_init(&zc
, dp
->dp_meta_objset
, snapobj
);
1732 zap_cursor_retrieve(&zc
, attr
) == 0;
1733 (void) zap_cursor_advance(&zc
)) {
1734 ASSERT3U(attr
->za_integer_length
, ==,
1736 ASSERT3U(attr
->za_num_integers
, ==, 1);
1738 child
= kmem_asprintf("%s@%s",
1739 name
, attr
->za_name
);
1740 dsl_pool_config_exit(dp
, FTAG
);
1741 err
= func(child
, arg
);
1742 dsl_pool_config_enter(dp
, FTAG
);
1747 zap_cursor_fini(&zc
);
1751 dsl_dir_rele(dd
, FTAG
);
1752 kmem_free(attr
, sizeof (zap_attribute_t
));
1753 dsl_pool_config_exit(dp
, FTAG
);
1758 /* Apply to self. */
1759 return (func(name
, arg
));
1763 * See comment above dmu_objset_find_impl().
1766 dmu_objset_find(char *name
, int func(const char *, void *), void *arg
,
1772 error
= spa_open(name
, &spa
, FTAG
);
1775 error
= dmu_objset_find_impl(spa
, name
, func
, arg
, flags
);
1776 spa_close(spa
, FTAG
);
1781 dmu_objset_set_user(objset_t
*os
, void *user_ptr
)
1783 ASSERT(MUTEX_HELD(&os
->os_user_ptr_lock
));
1784 os
->os_user_ptr
= user_ptr
;
1788 dmu_objset_get_user(objset_t
*os
)
1790 ASSERT(MUTEX_HELD(&os
->os_user_ptr_lock
));
1791 return (os
->os_user_ptr
);
1795 * Determine name of filesystem, given name of snapshot.
1796 * buf must be at least MAXNAMELEN bytes
1799 dmu_fsname(const char *snapname
, char *buf
)
1801 char *atp
= strchr(snapname
, '@');
1803 return (SET_ERROR(EINVAL
));
1804 if (atp
- snapname
>= MAXNAMELEN
)
1805 return (SET_ERROR(ENAMETOOLONG
));
1806 (void) strlcpy(buf
, snapname
, atp
- snapname
+ 1);
1810 #if defined(_KERNEL) && defined(HAVE_SPL)
1811 EXPORT_SYMBOL(dmu_objset_zil
);
1812 EXPORT_SYMBOL(dmu_objset_pool
);
1813 EXPORT_SYMBOL(dmu_objset_ds
);
1814 EXPORT_SYMBOL(dmu_objset_type
);
1815 EXPORT_SYMBOL(dmu_objset_name
);
1816 EXPORT_SYMBOL(dmu_objset_hold
);
1817 EXPORT_SYMBOL(dmu_objset_own
);
1818 EXPORT_SYMBOL(dmu_objset_rele
);
1819 EXPORT_SYMBOL(dmu_objset_disown
);
1820 EXPORT_SYMBOL(dmu_objset_from_ds
);
1821 EXPORT_SYMBOL(dmu_objset_create
);
1822 EXPORT_SYMBOL(dmu_objset_clone
);
1823 EXPORT_SYMBOL(dmu_objset_stats
);
1824 EXPORT_SYMBOL(dmu_objset_fast_stat
);
1825 EXPORT_SYMBOL(dmu_objset_spa
);
1826 EXPORT_SYMBOL(dmu_objset_space
);
1827 EXPORT_SYMBOL(dmu_objset_fsid_guid
);
1828 EXPORT_SYMBOL(dmu_objset_find
);
1829 EXPORT_SYMBOL(dmu_objset_byteswap
);
1830 EXPORT_SYMBOL(dmu_objset_evict_dbufs
);
1831 EXPORT_SYMBOL(dmu_objset_snap_cmtime
);
1833 EXPORT_SYMBOL(dmu_objset_sync
);
1834 EXPORT_SYMBOL(dmu_objset_is_dirty
);
1835 EXPORT_SYMBOL(dmu_objset_create_impl
);
1836 EXPORT_SYMBOL(dmu_objset_open_impl
);
1837 EXPORT_SYMBOL(dmu_objset_evict
);
1838 EXPORT_SYMBOL(dmu_objset_register_type
);
1839 EXPORT_SYMBOL(dmu_objset_do_userquota_updates
);
1840 EXPORT_SYMBOL(dmu_objset_userquota_get_ids
);
1841 EXPORT_SYMBOL(dmu_objset_userused_enabled
);
1842 EXPORT_SYMBOL(dmu_objset_userspace_upgrade
);
1843 EXPORT_SYMBOL(dmu_objset_userspace_present
);