1/*
2 * CDDL HEADER START
3 *
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.
7 *
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.
12 *
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]
18 *
19 * CDDL HEADER END
20 */
21/*
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.
25 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
26 */
27
28/* Portions Copyright 2010 Robert Milkowski */
29
30#include <sys/cred.h>
31#include <sys/zfs_context.h>
32#include <sys/dmu_objset.h>
33#include <sys/dsl_dir.h>
34#include <sys/dsl_dataset.h>
35#include <sys/dsl_prop.h>
36#include <sys/dsl_pool.h>
37#include <sys/dsl_synctask.h>
38#include <sys/dsl_deleg.h>
39#include <sys/dnode.h>
40#include <sys/dbuf.h>
41#include <sys/zvol.h>
42#include <sys/dmu_tx.h>
43#include <sys/zap.h>
44#include <sys/zil.h>
45#include <sys/dmu_impl.h>
46#include <sys/zfs_ioctl.h>
47#include <sys/sa.h>
48#include <sys/zfs_onexit.h>
49#include <sys/dsl_destroy.h>
50
51/*
52 * Needed to close a window in dnode_move() that allows the objset to be freed
53 * before it can be safely accessed.
54 */
55krwlock_t os_lock;
56
57void
58dmu_objset_init(void)
59{
60 rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
61}
62
63void
64dmu_objset_fini(void)
65{
66 rw_destroy(&os_lock);
67}
68
69spa_t *
70dmu_objset_spa(objset_t *os)
71{
72 return (os->os_spa);
73}
74
75zilog_t *
76dmu_objset_zil(objset_t *os)
77{
78 return (os->os_zil);
79}
80
81dsl_pool_t *
82dmu_objset_pool(objset_t *os)
83{
84 dsl_dataset_t *ds;
85
86 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
87 return (ds->ds_dir->dd_pool);
88 else
89 return (spa_get_dsl(os->os_spa));
90}
91
92dsl_dataset_t *
93dmu_objset_ds(objset_t *os)
94{
95 return (os->os_dsl_dataset);
96}
97
98dmu_objset_type_t
99dmu_objset_type(objset_t *os)
100{
101 return (os->os_phys->os_type);
102}
103
104void
105dmu_objset_name(objset_t *os, char *buf)
106{
107 dsl_dataset_name(os->os_dsl_dataset, buf);
108}
109
110uint64_t
111dmu_objset_id(objset_t *os)
112{
113 dsl_dataset_t *ds = os->os_dsl_dataset;
114
115 return (ds ? ds->ds_object : 0);
116}
117
118zfs_sync_type_t
119dmu_objset_syncprop(objset_t *os)
120{
121 return (os->os_sync);
122}
123
124zfs_logbias_op_t
125dmu_objset_logbias(objset_t *os)
126{
127 return (os->os_logbias);
128}
129
130static void
131checksum_changed_cb(void *arg, uint64_t newval)
132{
133 objset_t *os = arg;
134
135 /*
136 * Inheritance should have been done by now.
137 */
138 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
139
140 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
141}
142
143static void
144compression_changed_cb(void *arg, uint64_t newval)
145{
146 objset_t *os = arg;
147
148 /*
149 * Inheritance and range checking should have been done by now.
150 */
151 ASSERT(newval != ZIO_COMPRESS_INHERIT);
152
153 os->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
154}
155
156static void
157copies_changed_cb(void *arg, uint64_t newval)
158{
159 objset_t *os = arg;
160
161 /*
162 * Inheritance and range checking should have been done by now.
163 */
164 ASSERT(newval > 0);
165 ASSERT(newval <= spa_max_replication(os->os_spa));
166
167 os->os_copies = newval;
168}
169
170static void
171dedup_changed_cb(void *arg, uint64_t newval)
172{
173 objset_t *os = arg;
174 spa_t *spa = os->os_spa;
175 enum zio_checksum checksum;
176
177 /*
178 * Inheritance should have been done by now.
179 */
180 ASSERT(newval != ZIO_CHECKSUM_INHERIT);
181
182 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
183
184 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
185 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
186}
187
188static void
189primary_cache_changed_cb(void *arg, uint64_t newval)
190{
191 objset_t *os = arg;
192
193 /*
194 * Inheritance and range checking should have been done by now.
195 */
196 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
197 newval == ZFS_CACHE_METADATA);
198
199 os->os_primary_cache = newval;
200}
201
202static void
203secondary_cache_changed_cb(void *arg, uint64_t newval)
204{
205 objset_t *os = arg;
206
207 /*
208 * Inheritance and range checking should have been done by now.
209 */
210 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
211 newval == ZFS_CACHE_METADATA);
212
213 os->os_secondary_cache = newval;
214}
215
216static void
217sync_changed_cb(void *arg, uint64_t newval)
218{
219 objset_t *os = arg;
220
221 /*
222 * Inheritance and range checking should have been done by now.
223 */
224 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
225 newval == ZFS_SYNC_DISABLED);
226
227 os->os_sync = newval;
228 if (os->os_zil)
229 zil_set_sync(os->os_zil, newval);
230}
231
232static void
233redundant_metadata_changed_cb(void *arg, uint64_t newval)
234{
235 objset_t *os = arg;
236
237 /*
238 * Inheritance and range checking should have been done by now.
239 */
240 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
241 newval == ZFS_REDUNDANT_METADATA_MOST);
242
243 os->os_redundant_metadata = newval;
244}
245
246static void
247logbias_changed_cb(void *arg, uint64_t newval)
248{
249 objset_t *os = arg;
250
251 ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
252 newval == ZFS_LOGBIAS_THROUGHPUT);
253 os->os_logbias = newval;
254 if (os->os_zil)
255 zil_set_logbias(os->os_zil, newval);
256}
257
258void
259dmu_objset_byteswap(void *buf, size_t size)
260{
261 objset_phys_t *osp = buf;
262
263 ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
264 dnode_byteswap(&osp->os_meta_dnode);
265 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
266 osp->os_type = BSWAP_64(osp->os_type);
267 osp->os_flags = BSWAP_64(osp->os_flags);
268 if (size == sizeof (objset_phys_t)) {
269 dnode_byteswap(&osp->os_userused_dnode);
270 dnode_byteswap(&osp->os_groupused_dnode);
271 }
272}
273
274int
275dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
276 objset_t **osp)
277{
278 objset_t *os;
279 int i, err;
280
281 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
282
283 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
284 os->os_dsl_dataset = ds;
285 os->os_spa = spa;
286 os->os_rootbp = bp;
287 if (!BP_IS_HOLE(os->os_rootbp)) {
288 uint32_t aflags = ARC_WAIT;
289 zbookmark_phys_t zb;
290 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
291 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
292
293 if (DMU_OS_IS_L2CACHEABLE(os))
294 aflags |= ARC_L2CACHE;
295 if (DMU_OS_IS_L2COMPRESSIBLE(os))
296 aflags |= ARC_L2COMPRESS;
297
298 dprintf_bp(os->os_rootbp, "reading %s", "");
299 err = arc_read(NULL, spa, os->os_rootbp,
300 arc_getbuf_func, &os->os_phys_buf,
301 ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
302 if (err != 0) {
303 kmem_free(os, sizeof (objset_t));
304 /* convert checksum errors into IO errors */
305 if (err == ECKSUM)
306 err = SET_ERROR(EIO);
307 return (err);
308 }
309
310 /* Increase the blocksize if we are permitted. */
311 if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
312 arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) {
313 arc_buf_t *buf = arc_buf_alloc(spa,
314 sizeof (objset_phys_t), &os->os_phys_buf,
315 ARC_BUFC_METADATA);
316 bzero(buf->b_data, sizeof (objset_phys_t));
317 bcopy(os->os_phys_buf->b_data, buf->b_data,
318 arc_buf_size(os->os_phys_buf));
319 (void) arc_buf_remove_ref(os->os_phys_buf,
320 &os->os_phys_buf);
321 os->os_phys_buf = buf;
322 }
323
324 os->os_phys = os->os_phys_buf->b_data;
325 os->os_flags = os->os_phys->os_flags;
326 } else {
327 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
328 sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
329 os->os_phys_buf = arc_buf_alloc(spa, size,
330 &os->os_phys_buf, ARC_BUFC_METADATA);
331 os->os_phys = os->os_phys_buf->b_data;
332 bzero(os->os_phys, size);
333 }
334
335 /*
336 * Note: the changed_cb will be called once before the register
337 * func returns, thus changing the checksum/compression from the
338 * default (fletcher2/off). Snapshots don't need to know about
339 * checksum/compression/copies.
340 */
341 if (ds != NULL) {
342 err = dsl_prop_register(ds,
343 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
344 primary_cache_changed_cb, os);
345 if (err == 0) {
346 err = dsl_prop_register(ds,
347 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
348 secondary_cache_changed_cb, os);
349 }
350 if (!dsl_dataset_is_snapshot(ds)) {
351 if (err == 0) {
352 err = dsl_prop_register(ds,
353 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
354 checksum_changed_cb, os);
355 }
356 if (err == 0) {
357 err = dsl_prop_register(ds,
358 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
359 compression_changed_cb, os);
360 }
361 if (err == 0) {
362 err = dsl_prop_register(ds,
363 zfs_prop_to_name(ZFS_PROP_COPIES),
364 copies_changed_cb, os);
365 }
366 if (err == 0) {
367 err = dsl_prop_register(ds,
368 zfs_prop_to_name(ZFS_PROP_DEDUP),
369 dedup_changed_cb, os);
370 }
371 if (err == 0) {
372 err = dsl_prop_register(ds,
373 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
374 logbias_changed_cb, os);
375 }
376 if (err == 0) {
377 err = dsl_prop_register(ds,
378 zfs_prop_to_name(ZFS_PROP_SYNC),
379 sync_changed_cb, os);
380 }
381 if (err == 0) {
382 err = dsl_prop_register(ds,
383 zfs_prop_to_name(
384 ZFS_PROP_REDUNDANT_METADATA),
385 redundant_metadata_changed_cb, os);
386 }
387 }
388 if (err != 0) {
389 VERIFY(arc_buf_remove_ref(os->os_phys_buf,
390 &os->os_phys_buf));
391 kmem_free(os, sizeof (objset_t));
392 return (err);
393 }
394 } else {
395 /* It's the meta-objset. */
396 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
397 os->os_compress = ZIO_COMPRESS_LZJB;
398 os->os_copies = spa_max_replication(spa);
399 os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
400 os->os_dedup_verify = B_FALSE;
401 os->os_logbias = ZFS_LOGBIAS_LATENCY;
402 os->os_sync = ZFS_SYNC_STANDARD;
403 os->os_primary_cache = ZFS_CACHE_ALL;
404 os->os_secondary_cache = ZFS_CACHE_ALL;
405 }
406
407 if (ds == NULL || !dsl_dataset_is_snapshot(ds))
408 os->os_zil_header = os->os_phys->os_zil_header;
409 os->os_zil = zil_alloc(os, &os->os_zil_header);
410
411 for (i = 0; i < TXG_SIZE; i++) {
412 list_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
413 offsetof(dnode_t, dn_dirty_link[i]));
414 list_create(&os->os_free_dnodes[i], sizeof (dnode_t),
415 offsetof(dnode_t, dn_dirty_link[i]));
416 }
417 list_create(&os->os_dnodes, sizeof (dnode_t),
418 offsetof(dnode_t, dn_link));
419 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
420 offsetof(dmu_buf_impl_t, db_link));
421
422 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
423 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
424 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
425
426 DMU_META_DNODE(os) = dnode_special_open(os,
427 &os->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT,
428 &os->os_meta_dnode);
429 if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) {
430 DMU_USERUSED_DNODE(os) = dnode_special_open(os,
431 &os->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT,
432 &os->os_userused_dnode);
433 DMU_GROUPUSED_DNODE(os) = dnode_special_open(os,
434 &os->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT,
435 &os->os_groupused_dnode);
436 }
437
438 *osp = os;
439 return (0);
440}
441
442int
443dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
444{
445 int err = 0;
446
447 mutex_enter(&ds->ds_opening_lock);
448 if (ds->ds_objset == NULL) {
449 objset_t *os;
450 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
451 ds, dsl_dataset_get_blkptr(ds), &os);
452
453 if (err == 0) {
454 mutex_enter(&ds->ds_lock);
455 ASSERT(ds->ds_objset == NULL);
456 ds->ds_objset = os;
457 mutex_exit(&ds->ds_lock);
458 }
459 }
460 *osp = ds->ds_objset;
461 mutex_exit(&ds->ds_opening_lock);
462 return (err);
463}
464
465/*
466 * Holds the pool while the objset is held. Therefore only one objset
467 * can be held at a time.
468 */
469int
470dmu_objset_hold(const char *name, void *tag, objset_t **osp)
471{
472 dsl_pool_t *dp;
473 dsl_dataset_t *ds;
474 int err;
475
476 err = dsl_pool_hold(name, tag, &dp);
477 if (err != 0)
478 return (err);
479 err = dsl_dataset_hold(dp, name, tag, &ds);
480 if (err != 0) {
481 dsl_pool_rele(dp, tag);
482 return (err);
483 }
484
485 err = dmu_objset_from_ds(ds, osp);
486 if (err != 0) {
487 dsl_dataset_rele(ds, tag);
488 dsl_pool_rele(dp, tag);
489 }
490
491 return (err);
492}
493
494/*
495 * dsl_pool must not be held when this is called.
496 * Upon successful return, there will be a longhold on the dataset,
497 * and the dsl_pool will not be held.
498 */
499int
500dmu_objset_own(const char *name, dmu_objset_type_t type,
501 boolean_t readonly, void *tag, objset_t **osp)
502{
503 dsl_pool_t *dp;
504 dsl_dataset_t *ds;
505 int err;
506
507 err = dsl_pool_hold(name, FTAG, &dp);
508 if (err != 0)
509 return (err);
510 err = dsl_dataset_own(dp, name, tag, &ds);
511 if (err != 0) {
512 dsl_pool_rele(dp, FTAG);
513 return (err);
514 }
515
516 err = dmu_objset_from_ds(ds, osp);
517 dsl_pool_rele(dp, FTAG);
518 if (err != 0) {
519 dsl_dataset_disown(ds, tag);
520 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
521 dsl_dataset_disown(ds, tag);
522 return (SET_ERROR(EINVAL));
523 } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
524 dsl_dataset_disown(ds, tag);
525 return (SET_ERROR(EROFS));
526 }
527 return (err);
528}
529
530void
531dmu_objset_rele(objset_t *os, void *tag)
532{
533 dsl_pool_t *dp = dmu_objset_pool(os);
534 dsl_dataset_rele(os->os_dsl_dataset, tag);
535 dsl_pool_rele(dp, tag);
536}
537
538/*
539 * When we are called, os MUST refer to an objset associated with a dataset
540 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
541 * == tag. We will then release and reacquire ownership of the dataset while
542 * holding the pool config_rwlock to avoid intervening namespace or ownership
543 * changes may occur.
544 *
545 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
546 * release the hold on its dataset and acquire a new one on the dataset of the
547 * same name so that it can be partially torn down and reconstructed.
548 */
549void
550dmu_objset_refresh_ownership(objset_t *os, void *tag)
551{
552 dsl_pool_t *dp;
553 dsl_dataset_t *ds, *newds;
554 char name[MAXNAMELEN];
555
556 ds = os->os_dsl_dataset;
557 VERIFY3P(ds, !=, NULL);
558 VERIFY3P(ds->ds_owner, ==, tag);
559 VERIFY(dsl_dataset_long_held(ds));
560
561 dsl_dataset_name(ds, name);
562 dp = dmu_objset_pool(os);
563 dsl_pool_config_enter(dp, FTAG);
564 dmu_objset_disown(os, tag);
565 VERIFY0(dsl_dataset_own(dp, name, tag, &newds));
566 VERIFY3P(newds, ==, os->os_dsl_dataset);
567 dsl_pool_config_exit(dp, FTAG);
568}
569
570void
571dmu_objset_disown(objset_t *os, void *tag)
572{
573 dsl_dataset_disown(os->os_dsl_dataset, tag);
574}
575
576void
577dmu_objset_evict_dbufs(objset_t *os)
578{
579 dnode_t *dn;
580
581 mutex_enter(&os->os_lock);
582
583 /* process the mdn last, since the other dnodes have holds on it */
584 list_remove(&os->os_dnodes, DMU_META_DNODE(os));
585 list_insert_tail(&os->os_dnodes, DMU_META_DNODE(os));
586
587 /*
588 * Find the first dnode with holds. We have to do this dance
589 * because dnode_add_ref() only works if you already have a
590 * hold. If there are no holds then it has no dbufs so OK to
591 * skip.
592 */
593 for (dn = list_head(&os->os_dnodes);
594 dn && !dnode_add_ref(dn, FTAG);
595 dn = list_next(&os->os_dnodes, dn))
596 continue;
597
598 while (dn) {
599 dnode_t *next_dn = dn;
600
601 do {
602 next_dn = list_next(&os->os_dnodes, next_dn);
603 } while (next_dn && !dnode_add_ref(next_dn, FTAG));
604
605 mutex_exit(&os->os_lock);
606 dnode_evict_dbufs(dn);
607 dnode_rele(dn, FTAG);
608 mutex_enter(&os->os_lock);
609 dn = next_dn;
610 }
611 mutex_exit(&os->os_lock);
612}
613
614void
615dmu_objset_evict(objset_t *os)
616{
617 dsl_dataset_t *ds = os->os_dsl_dataset;
618
619 for (int t = 0; t < TXG_SIZE; t++)
620 ASSERT(!dmu_objset_is_dirty(os, t));
621
622 if (ds) {
623 if (!dsl_dataset_is_snapshot(ds)) {
624 VERIFY0(dsl_prop_unregister(ds,
625 zfs_prop_to_name(ZFS_PROP_CHECKSUM),
626 checksum_changed_cb, os));
627 VERIFY0(dsl_prop_unregister(ds,
628 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
629 compression_changed_cb, os));
630 VERIFY0(dsl_prop_unregister(ds,
631 zfs_prop_to_name(ZFS_PROP_COPIES),
632 copies_changed_cb, os));
633 VERIFY0(dsl_prop_unregister(ds,
634 zfs_prop_to_name(ZFS_PROP_DEDUP),
635 dedup_changed_cb, os));
636 VERIFY0(dsl_prop_unregister(ds,
637 zfs_prop_to_name(ZFS_PROP_LOGBIAS),
638 logbias_changed_cb, os));
639 VERIFY0(dsl_prop_unregister(ds,
640 zfs_prop_to_name(ZFS_PROP_SYNC),
641 sync_changed_cb, os));
642 VERIFY0(dsl_prop_unregister(ds,
643 zfs_prop_to_name(ZFS_PROP_REDUNDANT_METADATA),
644 redundant_metadata_changed_cb, os));
645 }
646 VERIFY0(dsl_prop_unregister(ds,
647 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
648 primary_cache_changed_cb, os));
649 VERIFY0(dsl_prop_unregister(ds,
650 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
651 secondary_cache_changed_cb, os));
652 }
653
654 if (os->os_sa)
655 sa_tear_down(os);
656
657 dmu_objset_evict_dbufs(os);
658
659 dnode_special_close(&os->os_meta_dnode);
660 if (DMU_USERUSED_DNODE(os)) {
661 dnode_special_close(&os->os_userused_dnode);
662 dnode_special_close(&os->os_groupused_dnode);
663 }
664 zil_free(os->os_zil);
665
666 ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
667
668 VERIFY(arc_buf_remove_ref(os->os_phys_buf, &os->os_phys_buf));
669
670 /*
671 * This is a barrier to prevent the objset from going away in
672 * dnode_move() until we can safely ensure that the objset is still in
673 * use. We consider the objset valid before the barrier and invalid
674 * after the barrier.
675 */
676 rw_enter(&os_lock, RW_READER);
677 rw_exit(&os_lock);
678
679 mutex_destroy(&os->os_lock);
680 mutex_destroy(&os->os_obj_lock);
681 mutex_destroy(&os->os_user_ptr_lock);
682 kmem_free(os, sizeof (objset_t));
683}
684
685timestruc_t
686dmu_objset_snap_cmtime(objset_t *os)
687{
688 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
689}
690
691/* called from dsl for meta-objset */
692objset_t *
693dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
694 dmu_objset_type_t type, dmu_tx_t *tx)
695{
696 objset_t *os;
697 dnode_t *mdn;
698
699 ASSERT(dmu_tx_is_syncing(tx));
700
701 if (ds != NULL)
702 VERIFY0(dmu_objset_from_ds(ds, &os));
703 else
704 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
705
706 mdn = DMU_META_DNODE(os);
707
708 dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
709 DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
710
711 /*
712 * We don't want to have to increase the meta-dnode's nlevels
713 * later, because then we could do it in quescing context while
714 * we are also accessing it in open context.
715 *
716 * This precaution is not necessary for the MOS (ds == NULL),
717 * because the MOS is only updated in syncing context.
718 * This is most fortunate: the MOS is the only objset that
719 * needs to be synced multiple times as spa_sync() iterates
720 * to convergence, so minimizing its dn_nlevels matters.
721 */
722 if (ds != NULL) {
723 int levels = 1;
724
725 /*
726 * Determine the number of levels necessary for the meta-dnode
727 * to contain DN_MAX_OBJECT dnodes.
728 */
729 while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift +
730 (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
731 DN_MAX_OBJECT * sizeof (dnode_phys_t))
732 levels++;
733
734 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
735 mdn->dn_nlevels = levels;
736 }
737
738 ASSERT(type != DMU_OST_NONE);
739 ASSERT(type != DMU_OST_ANY);
740 ASSERT(type < DMU_OST_NUMTYPES);
741 os->os_phys->os_type = type;
742 if (dmu_objset_userused_enabled(os)) {
743 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
744 os->os_flags = os->os_phys->os_flags;
745 }
746
747 dsl_dataset_dirty(ds, tx);
748
749 return (os);
750}
751
752typedef struct dmu_objset_create_arg {
753 const char *doca_name;
754 cred_t *doca_cred;
755 void (*doca_userfunc)(objset_t *os, void *arg,
756 cred_t *cr, dmu_tx_t *tx);
757 void *doca_userarg;
758 dmu_objset_type_t doca_type;
759 uint64_t doca_flags;
760} dmu_objset_create_arg_t;
761
762/*ARGSUSED*/
763static int
764dmu_objset_create_check(void *arg, dmu_tx_t *tx)
765{
766 dmu_objset_create_arg_t *doca = arg;
767 dsl_pool_t *dp = dmu_tx_pool(tx);
768 dsl_dir_t *pdd;
769 const char *tail;
770 int error;
771
772 if (strchr(doca->doca_name, '@') != NULL)
773 return (SET_ERROR(EINVAL));
774
775 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
776 if (error != 0)
777 return (error);
778 if (tail == NULL) {
779 dsl_dir_rele(pdd, FTAG);
780 return (SET_ERROR(EEXIST));
781 }
782 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
783 doca->doca_cred);
784 dsl_dir_rele(pdd, FTAG);
785
786 return (error);
787}
788
789static void
790dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
791{
792 dmu_objset_create_arg_t *doca = arg;
793 dsl_pool_t *dp = dmu_tx_pool(tx);
794 dsl_dir_t *pdd;
795 const char *tail;
796 dsl_dataset_t *ds;
797 uint64_t obj;
798 blkptr_t *bp;
799 objset_t *os;
800
801 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
802
803 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
804 doca->doca_cred, tx);
805
806 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
807 bp = dsl_dataset_get_blkptr(ds);
808 os = dmu_objset_create_impl(pdd->dd_pool->dp_spa,
809 ds, bp, doca->doca_type, tx);
810
811 if (doca->doca_userfunc != NULL) {
812 doca->doca_userfunc(os, doca->doca_userarg,
813 doca->doca_cred, tx);
814 }
815
816 spa_history_log_internal_ds(ds, "create", tx, "");
817 dsl_dataset_rele(ds, FTAG);
818 dsl_dir_rele(pdd, FTAG);
819}
820
821int
822dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
823 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
824{
825 dmu_objset_create_arg_t doca;
826
827 doca.doca_name = name;
828 doca.doca_cred = CRED();
829 doca.doca_flags = flags;
830 doca.doca_userfunc = func;
831 doca.doca_userarg = arg;
832 doca.doca_type = type;
833
834 return (dsl_sync_task(name,
|
835 dmu_objset_create_check, dmu_objset_create_sync, &doca, 5));
|
835 dmu_objset_create_check, dmu_objset_create_sync, &doca,
836 5, ZFS_SPACE_CHECK_NORMAL)); |
837}
838
839typedef struct dmu_objset_clone_arg {
840 const char *doca_clone;
841 const char *doca_origin;
842 cred_t *doca_cred;
843} dmu_objset_clone_arg_t;
844
845/*ARGSUSED*/
846static int
847dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
848{
849 dmu_objset_clone_arg_t *doca = arg;
850 dsl_dir_t *pdd;
851 const char *tail;
852 int error;
853 dsl_dataset_t *origin;
854 dsl_pool_t *dp = dmu_tx_pool(tx);
855
856 if (strchr(doca->doca_clone, '@') != NULL)
857 return (SET_ERROR(EINVAL));
858
859 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
860 if (error != 0)
861 return (error);
862 if (tail == NULL) {
863 dsl_dir_rele(pdd, FTAG);
864 return (SET_ERROR(EEXIST));
865 }
866 /* You can't clone across pools. */
867 if (pdd->dd_pool != dp) {
868 dsl_dir_rele(pdd, FTAG);
869 return (SET_ERROR(EXDEV));
870 }
871 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
872 doca->doca_cred);
873 if (error != 0) {
874 dsl_dir_rele(pdd, FTAG);
875 return (SET_ERROR(EDQUOT));
876 }
877 dsl_dir_rele(pdd, FTAG);
878
879 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
880 if (error != 0)
881 return (error);
882
883 /* You can't clone across pools. */
884 if (origin->ds_dir->dd_pool != dp) {
885 dsl_dataset_rele(origin, FTAG);
886 return (SET_ERROR(EXDEV));
887 }
888
889 /* You can only clone snapshots, not the head datasets. */
890 if (!dsl_dataset_is_snapshot(origin)) {
891 dsl_dataset_rele(origin, FTAG);
892 return (SET_ERROR(EINVAL));
893 }
894 dsl_dataset_rele(origin, FTAG);
895
896 return (0);
897}
898
899static void
900dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
901{
902 dmu_objset_clone_arg_t *doca = arg;
903 dsl_pool_t *dp = dmu_tx_pool(tx);
904 dsl_dir_t *pdd;
905 const char *tail;
906 dsl_dataset_t *origin, *ds;
907 uint64_t obj;
908 char namebuf[MAXNAMELEN];
909
910 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
911 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
912
913 obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
914 doca->doca_cred, tx);
915
916 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
917 dsl_dataset_name(origin, namebuf);
918 spa_history_log_internal_ds(ds, "clone", tx,
919 "origin=%s (%llu)", namebuf, origin->ds_object);
920 dsl_dataset_rele(ds, FTAG);
921 dsl_dataset_rele(origin, FTAG);
922 dsl_dir_rele(pdd, FTAG);
923}
924
925int
926dmu_objset_clone(const char *clone, const char *origin)
927{
928 dmu_objset_clone_arg_t doca;
929
930 doca.doca_clone = clone;
931 doca.doca_origin = origin;
932 doca.doca_cred = CRED();
933
934 return (dsl_sync_task(clone,
|
934 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 5));
|
935 dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
936 5, ZFS_SPACE_CHECK_NORMAL)); |
937}
938
939int
940dmu_objset_snapshot_one(const char *fsname, const char *snapname)
941{
942 int err;
943 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
944 nvlist_t *snaps = fnvlist_alloc();
945
946 fnvlist_add_boolean(snaps, longsnap);
947 strfree(longsnap);
948 err = dsl_dataset_snapshot(snaps, NULL, NULL);
949 fnvlist_free(snaps);
950 return (err);
951}
952
953static void
954dmu_objset_sync_dnodes(list_t *list, list_t *newlist, dmu_tx_t *tx)
955{
956 dnode_t *dn;
957
958 while (dn = list_head(list)) {
959 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
960 ASSERT(dn->dn_dbuf->db_data_pending);
961 /*
962 * Initialize dn_zio outside dnode_sync() because the
963 * meta-dnode needs to set it ouside dnode_sync().
964 */
965 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
966 ASSERT(dn->dn_zio);
967
968 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
969 list_remove(list, dn);
970
971 if (newlist) {
972 (void) dnode_add_ref(dn, newlist);
973 list_insert_tail(newlist, dn);
974 }
975
976 dnode_sync(dn, tx);
977 }
978}
979
980/* ARGSUSED */
981static void
982dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
983{
984 blkptr_t *bp = zio->io_bp;
985 objset_t *os = arg;
986 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
987
988 ASSERT(!BP_IS_EMBEDDED(bp));
989 ASSERT3P(bp, ==, os->os_rootbp);
990 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
991 ASSERT0(BP_GET_LEVEL(bp));
992
993 /*
994 * Update rootbp fill count: it should be the number of objects
995 * allocated in the object set (not counting the "special"
996 * objects that are stored in the objset_phys_t -- the meta
997 * dnode and user/group accounting objects).
998 */
999 bp->blk_fill = 0;
1000 for (int i = 0; i < dnp->dn_nblkptr; i++)
1001 bp->blk_fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
1002}
1003
1004/* ARGSUSED */
1005static void
1006dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
1007{
1008 blkptr_t *bp = zio->io_bp;
1009 blkptr_t *bp_orig = &zio->io_bp_orig;
1010 objset_t *os = arg;
1011
1012 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
1013 ASSERT(BP_EQUAL(bp, bp_orig));
1014 } else {
1015 dsl_dataset_t *ds = os->os_dsl_dataset;
1016 dmu_tx_t *tx = os->os_synctx;
1017
1018 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
1019 dsl_dataset_block_born(ds, bp, tx);
1020 }
1021}
1022
1023/* called from dsl */
1024void
1025dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
1026{
1027 int txgoff;
1028 zbookmark_phys_t zb;
1029 zio_prop_t zp;
1030 zio_t *zio;
1031 list_t *list;
1032 list_t *newlist = NULL;
1033 dbuf_dirty_record_t *dr;
1034
1035 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
1036
1037 ASSERT(dmu_tx_is_syncing(tx));
1038 /* XXX the write_done callback should really give us the tx... */
1039 os->os_synctx = tx;
1040
1041 if (os->os_dsl_dataset == NULL) {
1042 /*
1043 * This is the MOS. If we have upgraded,
1044 * spa_max_replication() could change, so reset
1045 * os_copies here.
1046 */
1047 os->os_copies = spa_max_replication(os->os_spa);
1048 }
1049
1050 /*
1051 * Create the root block IO
1052 */
1053 SET_BOOKMARK(&zb, os->os_dsl_dataset ?
1054 os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
1055 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
1056 arc_release(os->os_phys_buf, &os->os_phys_buf);
1057
1058 dmu_write_policy(os, NULL, 0, 0, &zp);
1059
1060 zio = arc_write(pio, os->os_spa, tx->tx_txg,
1061 os->os_rootbp, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os),
1062 DMU_OS_IS_L2COMPRESSIBLE(os), &zp, dmu_objset_write_ready,
1063 NULL, dmu_objset_write_done, os, ZIO_PRIORITY_ASYNC_WRITE,
1064 ZIO_FLAG_MUSTSUCCEED, &zb);
1065
1066 /*
1067 * Sync special dnodes - the parent IO for the sync is the root block
1068 */
1069 DMU_META_DNODE(os)->dn_zio = zio;
1070 dnode_sync(DMU_META_DNODE(os), tx);
1071
1072 os->os_phys->os_flags = os->os_flags;
1073
1074 if (DMU_USERUSED_DNODE(os) &&
1075 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
1076 DMU_USERUSED_DNODE(os)->dn_zio = zio;
1077 dnode_sync(DMU_USERUSED_DNODE(os), tx);
1078 DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
1079 dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
1080 }
1081
1082 txgoff = tx->tx_txg & TXG_MASK;
1083
1084 if (dmu_objset_userused_enabled(os)) {
1085 newlist = &os->os_synced_dnodes;
1086 /*
1087 * We must create the list here because it uses the
1088 * dn_dirty_link[] of this txg.
1089 */
1090 list_create(newlist, sizeof (dnode_t),
1091 offsetof(dnode_t, dn_dirty_link[txgoff]));
1092 }
1093
1094 dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx);
1095 dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx);
1096
1097 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
1098 while (dr = list_head(list)) {
1099 ASSERT0(dr->dr_dbuf->db_level);
1100 list_remove(list, dr);
1101 if (dr->dr_zio)
1102 zio_nowait(dr->dr_zio);
1103 }
1104 /*
1105 * Free intent log blocks up to this tx.
1106 */
1107 zil_sync(os->os_zil, tx);
1108 os->os_phys->os_zil_header = os->os_zil_header;
1109 zio_nowait(zio);
1110}
1111
1112boolean_t
1113dmu_objset_is_dirty(objset_t *os, uint64_t txg)
1114{
1115 return (!list_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]) ||
1116 !list_is_empty(&os->os_free_dnodes[txg & TXG_MASK]));
1117}
1118
1119static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
1120
1121void
1122dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
1123{
1124 used_cbs[ost] = cb;
1125}
1126
1127boolean_t
1128dmu_objset_userused_enabled(objset_t *os)
1129{
1130 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
1131 used_cbs[os->os_phys->os_type] != NULL &&
1132 DMU_USERUSED_DNODE(os) != NULL);
1133}
1134
1135static void
1136do_userquota_update(objset_t *os, uint64_t used, uint64_t flags,
1137 uint64_t user, uint64_t group, boolean_t subtract, dmu_tx_t *tx)
1138{
1139 if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) {
1140 int64_t delta = DNODE_SIZE + used;
1141 if (subtract)
1142 delta = -delta;
1143 VERIFY3U(0, ==, zap_increment_int(os, DMU_USERUSED_OBJECT,
1144 user, delta, tx));
1145 VERIFY3U(0, ==, zap_increment_int(os, DMU_GROUPUSED_OBJECT,
1146 group, delta, tx));
1147 }
1148}
1149
1150void
1151dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx)
1152{
1153 dnode_t *dn;
1154 list_t *list = &os->os_synced_dnodes;
1155
1156 ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os));
1157
1158 while (dn = list_head(list)) {
1159 int flags;
1160 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
1161 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
1162 dn->dn_phys->dn_flags &
1163 DNODE_FLAG_USERUSED_ACCOUNTED);
1164
1165 /* Allocate the user/groupused objects if necessary. */
1166 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
1167 VERIFY(0 == zap_create_claim(os,
1168 DMU_USERUSED_OBJECT,
1169 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1170 VERIFY(0 == zap_create_claim(os,
1171 DMU_GROUPUSED_OBJECT,
1172 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
1173 }
1174
1175 /*
1176 * We intentionally modify the zap object even if the
1177 * net delta is zero. Otherwise
1178 * the block of the zap obj could be shared between
1179 * datasets but need to be different between them after
1180 * a bprewrite.
1181 */
1182
1183 flags = dn->dn_id_flags;
1184 ASSERT(flags);
1185 if (flags & DN_ID_OLD_EXIST) {
1186 do_userquota_update(os, dn->dn_oldused, dn->dn_oldflags,
1187 dn->dn_olduid, dn->dn_oldgid, B_TRUE, tx);
1188 }
1189 if (flags & DN_ID_NEW_EXIST) {
1190 do_userquota_update(os, DN_USED_BYTES(dn->dn_phys),
1191 dn->dn_phys->dn_flags, dn->dn_newuid,
1192 dn->dn_newgid, B_FALSE, tx);
1193 }
1194
1195 mutex_enter(&dn->dn_mtx);
1196 dn->dn_oldused = 0;
1197 dn->dn_oldflags = 0;
1198 if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
1199 dn->dn_olduid = dn->dn_newuid;
1200 dn->dn_oldgid = dn->dn_newgid;
1201 dn->dn_id_flags |= DN_ID_OLD_EXIST;
1202 if (dn->dn_bonuslen == 0)
1203 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
1204 else
1205 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1206 }
1207 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
1208 mutex_exit(&dn->dn_mtx);
1209
1210 list_remove(list, dn);
1211 dnode_rele(dn, list);
1212 }
1213}
1214
1215/*
1216 * Returns a pointer to data to find uid/gid from
1217 *
1218 * If a dirty record for transaction group that is syncing can't
1219 * be found then NULL is returned. In the NULL case it is assumed
1220 * the uid/gid aren't changing.
1221 */
1222static void *
1223dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
1224{
1225 dbuf_dirty_record_t *dr, **drp;
1226 void *data;
1227
1228 if (db->db_dirtycnt == 0)
1229 return (db->db.db_data); /* Nothing is changing */
1230
1231 for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
1232 if (dr->dr_txg == tx->tx_txg)
1233 break;
1234
1235 if (dr == NULL) {
1236 data = NULL;
1237 } else {
1238 dnode_t *dn;
1239
1240 DB_DNODE_ENTER(dr->dr_dbuf);
1241 dn = DB_DNODE(dr->dr_dbuf);
1242
1243 if (dn->dn_bonuslen == 0 &&
1244 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
1245 data = dr->dt.dl.dr_data->b_data;
1246 else
1247 data = dr->dt.dl.dr_data;
1248
1249 DB_DNODE_EXIT(dr->dr_dbuf);
1250 }
1251
1252 return (data);
1253}
1254
1255void
1256dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
1257{
1258 objset_t *os = dn->dn_objset;
1259 void *data = NULL;
1260 dmu_buf_impl_t *db = NULL;
1261 uint64_t *user = NULL;
1262 uint64_t *group = NULL;
1263 int flags = dn->dn_id_flags;
1264 int error;
1265 boolean_t have_spill = B_FALSE;
1266
1267 if (!dmu_objset_userused_enabled(dn->dn_objset))
1268 return;
1269
1270 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
1271 DN_ID_CHKED_SPILL)))
1272 return;
1273
1274 if (before && dn->dn_bonuslen != 0)
1275 data = DN_BONUS(dn->dn_phys);
1276 else if (!before && dn->dn_bonuslen != 0) {
1277 if (dn->dn_bonus) {
1278 db = dn->dn_bonus;
1279 mutex_enter(&db->db_mtx);
1280 data = dmu_objset_userquota_find_data(db, tx);
1281 } else {
1282 data = DN_BONUS(dn->dn_phys);
1283 }
1284 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
1285 int rf = 0;
1286
1287 if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
1288 rf |= DB_RF_HAVESTRUCT;
1289 error = dmu_spill_hold_by_dnode(dn,
1290 rf | DB_RF_MUST_SUCCEED,
1291 FTAG, (dmu_buf_t **)&db);
1292 ASSERT(error == 0);
1293 mutex_enter(&db->db_mtx);
1294 data = (before) ? db->db.db_data :
1295 dmu_objset_userquota_find_data(db, tx);
1296 have_spill = B_TRUE;
1297 } else {
1298 mutex_enter(&dn->dn_mtx);
1299 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1300 mutex_exit(&dn->dn_mtx);
1301 return;
1302 }
1303
1304 if (before) {
1305 ASSERT(data);
1306 user = &dn->dn_olduid;
1307 group = &dn->dn_oldgid;
1308 } else if (data) {
1309 user = &dn->dn_newuid;
1310 group = &dn->dn_newgid;
1311 }
1312
1313 /*
1314 * Must always call the callback in case the object
1315 * type has changed and that type isn't an object type to track
1316 */
1317 error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data,
1318 user, group);
1319
1320 /*
1321 * Preserve existing uid/gid when the callback can't determine
1322 * what the new uid/gid are and the callback returned EEXIST.
1323 * The EEXIST error tells us to just use the existing uid/gid.
1324 * If we don't know what the old values are then just assign
1325 * them to 0, since that is a new file being created.
1326 */
1327 if (!before && data == NULL && error == EEXIST) {
1328 if (flags & DN_ID_OLD_EXIST) {
1329 dn->dn_newuid = dn->dn_olduid;
1330 dn->dn_newgid = dn->dn_oldgid;
1331 } else {
1332 dn->dn_newuid = 0;
1333 dn->dn_newgid = 0;
1334 }
1335 error = 0;
1336 }
1337
1338 if (db)
1339 mutex_exit(&db->db_mtx);
1340
1341 mutex_enter(&dn->dn_mtx);
1342 if (error == 0 && before)
1343 dn->dn_id_flags |= DN_ID_OLD_EXIST;
1344 if (error == 0 && !before)
1345 dn->dn_id_flags |= DN_ID_NEW_EXIST;
1346
1347 if (have_spill) {
1348 dn->dn_id_flags |= DN_ID_CHKED_SPILL;
1349 } else {
1350 dn->dn_id_flags |= DN_ID_CHKED_BONUS;
1351 }
1352 mutex_exit(&dn->dn_mtx);
1353 if (have_spill)
1354 dmu_buf_rele((dmu_buf_t *)db, FTAG);
1355}
1356
1357boolean_t
1358dmu_objset_userspace_present(objset_t *os)
1359{
1360 return (os->os_phys->os_flags &
1361 OBJSET_FLAG_USERACCOUNTING_COMPLETE);
1362}
1363
1364int
1365dmu_objset_userspace_upgrade(objset_t *os)
1366{
1367 uint64_t obj;
1368 int err = 0;
1369
1370 if (dmu_objset_userspace_present(os))
1371 return (0);
1372 if (!dmu_objset_userused_enabled(os))
1373 return (SET_ERROR(ENOTSUP));
1374 if (dmu_objset_is_snapshot(os))
1375 return (SET_ERROR(EINVAL));
1376
1377 /*
1378 * We simply need to mark every object dirty, so that it will be
1379 * synced out and now accounted. If this is called
1380 * concurrently, or if we already did some work before crashing,
1381 * that's fine, since we track each object's accounted state
1382 * independently.
1383 */
1384
1385 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
1386 dmu_tx_t *tx;
1387 dmu_buf_t *db;
1388 int objerr;
1389
1390 if (issig(JUSTLOOKING) && issig(FORREAL))
1391 return (SET_ERROR(EINTR));
1392
1393 objerr = dmu_bonus_hold(os, obj, FTAG, &db);
1394 if (objerr != 0)
1395 continue;
1396 tx = dmu_tx_create(os);
1397 dmu_tx_hold_bonus(tx, obj);
1398 objerr = dmu_tx_assign(tx, TXG_WAIT);
1399 if (objerr != 0) {
1400 dmu_tx_abort(tx);
1401 continue;
1402 }
1403 dmu_buf_will_dirty(db, tx);
1404 dmu_buf_rele(db, FTAG);
1405 dmu_tx_commit(tx);
1406 }
1407
1408 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
1409 txg_wait_synced(dmu_objset_pool(os), 0);
1410 return (0);
1411}
1412
1413void
1414dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
1415 uint64_t *usedobjsp, uint64_t *availobjsp)
1416{
1417 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
1418 usedobjsp, availobjsp);
1419}
1420
1421uint64_t
1422dmu_objset_fsid_guid(objset_t *os)
1423{
1424 return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
1425}
1426
1427void
1428dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
1429{
1430 stat->dds_type = os->os_phys->os_type;
1431 if (os->os_dsl_dataset)
1432 dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
1433}
1434
1435void
1436dmu_objset_stats(objset_t *os, nvlist_t *nv)
1437{
1438 ASSERT(os->os_dsl_dataset ||
1439 os->os_phys->os_type == DMU_OST_META);
1440
1441 if (os->os_dsl_dataset != NULL)
1442 dsl_dataset_stats(os->os_dsl_dataset, nv);
1443
1444 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
1445 os->os_phys->os_type);
1446 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
1447 dmu_objset_userspace_present(os));
1448}
1449
1450int
1451dmu_objset_is_snapshot(objset_t *os)
1452{
1453 if (os->os_dsl_dataset != NULL)
1454 return (dsl_dataset_is_snapshot(os->os_dsl_dataset));
1455 else
1456 return (B_FALSE);
1457}
1458
1459int
1460dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
1461 boolean_t *conflict)
1462{
1463 dsl_dataset_t *ds = os->os_dsl_dataset;
1464 uint64_t ignored;
1465
1466 if (ds->ds_phys->ds_snapnames_zapobj == 0)
1467 return (SET_ERROR(ENOENT));
1468
1469 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
1470 ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST,
1471 real, maxlen, conflict));
1472}
1473
1474int
1475dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
1476 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
1477{
1478 dsl_dataset_t *ds = os->os_dsl_dataset;
1479 zap_cursor_t cursor;
1480 zap_attribute_t attr;
1481
1482 ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
1483
1484 if (ds->ds_phys->ds_snapnames_zapobj == 0)
1485 return (SET_ERROR(ENOENT));
1486
1487 zap_cursor_init_serialized(&cursor,
1488 ds->ds_dir->dd_pool->dp_meta_objset,
1489 ds->ds_phys->ds_snapnames_zapobj, *offp);
1490
1491 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1492 zap_cursor_fini(&cursor);
1493 return (SET_ERROR(ENOENT));
1494 }
1495
1496 if (strlen(attr.za_name) + 1 > namelen) {
1497 zap_cursor_fini(&cursor);
1498 return (SET_ERROR(ENAMETOOLONG));
1499 }
1500
1501 (void) strcpy(name, attr.za_name);
1502 if (idp)
1503 *idp = attr.za_first_integer;
1504 if (case_conflict)
1505 *case_conflict = attr.za_normalization_conflict;
1506 zap_cursor_advance(&cursor);
1507 *offp = zap_cursor_serialize(&cursor);
1508 zap_cursor_fini(&cursor);
1509
1510 return (0);
1511}
1512
1513int
1514dmu_dir_list_next(objset_t *os, int namelen, char *name,
1515 uint64_t *idp, uint64_t *offp)
1516{
1517 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
1518 zap_cursor_t cursor;
1519 zap_attribute_t attr;
1520
1521 /* there is no next dir on a snapshot! */
1522 if (os->os_dsl_dataset->ds_object !=
1523 dd->dd_phys->dd_head_dataset_obj)
1524 return (SET_ERROR(ENOENT));
1525
1526 zap_cursor_init_serialized(&cursor,
1527 dd->dd_pool->dp_meta_objset,
1528 dd->dd_phys->dd_child_dir_zapobj, *offp);
1529
1530 if (zap_cursor_retrieve(&cursor, &attr) != 0) {
1531 zap_cursor_fini(&cursor);
1532 return (SET_ERROR(ENOENT));
1533 }
1534
1535 if (strlen(attr.za_name) + 1 > namelen) {
1536 zap_cursor_fini(&cursor);
1537 return (SET_ERROR(ENAMETOOLONG));
1538 }
1539
1540 (void) strcpy(name, attr.za_name);
1541 if (idp)
1542 *idp = attr.za_first_integer;
1543 zap_cursor_advance(&cursor);
1544 *offp = zap_cursor_serialize(&cursor);
1545 zap_cursor_fini(&cursor);
1546
1547 return (0);
1548}
1549
1550/*
1551 * Find objsets under and including ddobj, call func(ds) on each.
1552 */
1553int
1554dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
1555 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
1556{
1557 dsl_dir_t *dd;
1558 dsl_dataset_t *ds;
1559 zap_cursor_t zc;
1560 zap_attribute_t *attr;
1561 uint64_t thisobj;
1562 int err;
1563
1564 ASSERT(dsl_pool_config_held(dp));
1565
1566 err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd);
1567 if (err != 0)
1568 return (err);
1569
1570 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1571 if (dd->dd_myname[0] == '$') {
1572 dsl_dir_rele(dd, FTAG);
1573 return (0);
1574 }
1575
1576 thisobj = dd->dd_phys->dd_head_dataset_obj;
1577 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
1578
1579 /*
1580 * Iterate over all children.
1581 */
1582 if (flags & DS_FIND_CHILDREN) {
1583 for (zap_cursor_init(&zc, dp->dp_meta_objset,
1584 dd->dd_phys->dd_child_dir_zapobj);
1585 zap_cursor_retrieve(&zc, attr) == 0;
1586 (void) zap_cursor_advance(&zc)) {
1587 ASSERT3U(attr->za_integer_length, ==,
1588 sizeof (uint64_t));
1589 ASSERT3U(attr->za_num_integers, ==, 1);
1590
1591 err = dmu_objset_find_dp(dp, attr->za_first_integer,
1592 func, arg, flags);
1593 if (err != 0)
1594 break;
1595 }
1596 zap_cursor_fini(&zc);
1597
1598 if (err != 0) {
1599 dsl_dir_rele(dd, FTAG);
1600 kmem_free(attr, sizeof (zap_attribute_t));
1601 return (err);
1602 }
1603 }
1604
1605 /*
1606 * Iterate over all snapshots.
1607 */
1608 if (flags & DS_FIND_SNAPSHOTS) {
1609 dsl_dataset_t *ds;
1610 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
1611
1612 if (err == 0) {
1613 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
1614 dsl_dataset_rele(ds, FTAG);
1615
1616 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
1617 zap_cursor_retrieve(&zc, attr) == 0;
1618 (void) zap_cursor_advance(&zc)) {
1619 ASSERT3U(attr->za_integer_length, ==,
1620 sizeof (uint64_t));
1621 ASSERT3U(attr->za_num_integers, ==, 1);
1622
1623 err = dsl_dataset_hold_obj(dp,
1624 attr->za_first_integer, FTAG, &ds);
1625 if (err != 0)
1626 break;
1627 err = func(dp, ds, arg);
1628 dsl_dataset_rele(ds, FTAG);
1629 if (err != 0)
1630 break;
1631 }
1632 zap_cursor_fini(&zc);
1633 }
1634 }
1635
1636 dsl_dir_rele(dd, FTAG);
1637 kmem_free(attr, sizeof (zap_attribute_t));
1638
1639 if (err != 0)
1640 return (err);
1641
1642 /*
1643 * Apply to self.
1644 */
1645 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
1646 if (err != 0)
1647 return (err);
1648 err = func(dp, ds, arg);
1649 dsl_dataset_rele(ds, FTAG);
1650 return (err);
1651}
1652
1653/*
1654 * Find all objsets under name, and for each, call 'func(child_name, arg)'.
1655 * The dp_config_rwlock must not be held when this is called, and it
1656 * will not be held when the callback is called.
1657 * Therefore this function should only be used when the pool is not changing
1658 * (e.g. in syncing context), or the callback can deal with the possible races.
1659 */
1660static int
1661dmu_objset_find_impl(spa_t *spa, const char *name,
1662 int func(const char *, void *), void *arg, int flags)
1663{
1664 dsl_dir_t *dd;
1665 dsl_pool_t *dp = spa_get_dsl(spa);
1666 dsl_dataset_t *ds;
1667 zap_cursor_t zc;
1668 zap_attribute_t *attr;
1669 char *child;
1670 uint64_t thisobj;
1671 int err;
1672
1673 dsl_pool_config_enter(dp, FTAG);
1674
1675 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
1676 if (err != 0) {
1677 dsl_pool_config_exit(dp, FTAG);
1678 return (err);
1679 }
1680
1681 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
1682 if (dd->dd_myname[0] == '$') {
1683 dsl_dir_rele(dd, FTAG);
1684 dsl_pool_config_exit(dp, FTAG);
1685 return (0);
1686 }
1687
1688 thisobj = dd->dd_phys->dd_head_dataset_obj;
1689 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
1690
1691 /*
1692 * Iterate over all children.
1693 */
1694 if (flags & DS_FIND_CHILDREN) {
1695 for (zap_cursor_init(&zc, dp->dp_meta_objset,
1696 dd->dd_phys->dd_child_dir_zapobj);
1697 zap_cursor_retrieve(&zc, attr) == 0;
1698 (void) zap_cursor_advance(&zc)) {
1699 ASSERT3U(attr->za_integer_length, ==,
1700 sizeof (uint64_t));
1701 ASSERT3U(attr->za_num_integers, ==, 1);
1702
1703 child = kmem_asprintf("%s/%s", name, attr->za_name);
1704 dsl_pool_config_exit(dp, FTAG);
1705 err = dmu_objset_find_impl(spa, child,
1706 func, arg, flags);
1707 dsl_pool_config_enter(dp, FTAG);
1708 strfree(child);
1709 if (err != 0)
1710 break;
1711 }
1712 zap_cursor_fini(&zc);
1713
1714 if (err != 0) {
1715 dsl_dir_rele(dd, FTAG);
1716 dsl_pool_config_exit(dp, FTAG);
1717 kmem_free(attr, sizeof (zap_attribute_t));
1718 return (err);
1719 }
1720 }
1721
1722 /*
1723 * Iterate over all snapshots.
1724 */
1725 if (flags & DS_FIND_SNAPSHOTS) {
1726 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
1727
1728 if (err == 0) {
1729 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
1730 dsl_dataset_rele(ds, FTAG);
1731
1732 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
1733 zap_cursor_retrieve(&zc, attr) == 0;
1734 (void) zap_cursor_advance(&zc)) {
1735 ASSERT3U(attr->za_integer_length, ==,
1736 sizeof (uint64_t));
1737 ASSERT3U(attr->za_num_integers, ==, 1);
1738
1739 child = kmem_asprintf("%s@%s",
1740 name, attr->za_name);
1741 dsl_pool_config_exit(dp, FTAG);
1742 err = func(child, arg);
1743 dsl_pool_config_enter(dp, FTAG);
1744 strfree(child);
1745 if (err != 0)
1746 break;
1747 }
1748 zap_cursor_fini(&zc);
1749 }
1750 }
1751
1752 dsl_dir_rele(dd, FTAG);
1753 kmem_free(attr, sizeof (zap_attribute_t));
1754 dsl_pool_config_exit(dp, FTAG);
1755
1756 if (err != 0)
1757 return (err);
1758
1759 /* Apply to self. */
1760 return (func(name, arg));
1761}
1762
1763/*
1764 * See comment above dmu_objset_find_impl().
1765 */
1766int
1767dmu_objset_find(char *name, int func(const char *, void *), void *arg,
1768 int flags)
1769{
1770 spa_t *spa;
1771 int error;
1772
1773 error = spa_open(name, &spa, FTAG);
1774 if (error != 0)
1775 return (error);
1776 error = dmu_objset_find_impl(spa, name, func, arg, flags);
1777 spa_close(spa, FTAG);
1778 return (error);
1779}
1780
1781void
1782dmu_objset_set_user(objset_t *os, void *user_ptr)
1783{
1784 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
1785 os->os_user_ptr = user_ptr;
1786}
1787
1788void *
1789dmu_objset_get_user(objset_t *os)
1790{
1791 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
1792 return (os->os_user_ptr);
1793}
1794
1795/*
1796 * Determine name of filesystem, given name of snapshot.
1797 * buf must be at least MAXNAMELEN bytes
1798 */
1799int
1800dmu_fsname(const char *snapname, char *buf)
1801{
1802 char *atp = strchr(snapname, '@');
1803 if (atp == NULL)
1804 return (SET_ERROR(EINVAL));
1805 if (atp - snapname >= MAXNAMELEN)
1806 return (SET_ERROR(ENAMETOOLONG));
1807 (void) strlcpy(buf, snapname, atp - snapname + 1);
1808 return (0);
1809}
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