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34dc7c2f BB |
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 2008 Sun Microsystems, Inc. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
34dc7c2f BB |
26 | #include <sys/cred.h> |
27 | #include <sys/zfs_context.h> | |
28 | #include <sys/dmu_objset.h> | |
29 | #include <sys/dsl_dir.h> | |
30 | #include <sys/dsl_dataset.h> | |
31 | #include <sys/dsl_prop.h> | |
32 | #include <sys/dsl_pool.h> | |
33 | #include <sys/dsl_synctask.h> | |
34 | #include <sys/dsl_deleg.h> | |
35 | #include <sys/dnode.h> | |
36 | #include <sys/dbuf.h> | |
37 | #include <sys/zvol.h> | |
38 | #include <sys/dmu_tx.h> | |
39 | #include <sys/zio_checksum.h> | |
40 | #include <sys/zap.h> | |
41 | #include <sys/zil.h> | |
42 | #include <sys/dmu_impl.h> | |
43 | #include <sys/zfs_ioctl.h> | |
44 | ||
45 | spa_t * | |
46 | dmu_objset_spa(objset_t *os) | |
47 | { | |
48 | return (os->os->os_spa); | |
49 | } | |
50 | ||
51 | zilog_t * | |
52 | dmu_objset_zil(objset_t *os) | |
53 | { | |
54 | return (os->os->os_zil); | |
55 | } | |
56 | ||
57 | dsl_pool_t * | |
58 | dmu_objset_pool(objset_t *os) | |
59 | { | |
60 | dsl_dataset_t *ds; | |
61 | ||
62 | if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir) | |
63 | return (ds->ds_dir->dd_pool); | |
64 | else | |
65 | return (spa_get_dsl(os->os->os_spa)); | |
66 | } | |
67 | ||
68 | dsl_dataset_t * | |
69 | dmu_objset_ds(objset_t *os) | |
70 | { | |
71 | return (os->os->os_dsl_dataset); | |
72 | } | |
73 | ||
74 | dmu_objset_type_t | |
75 | dmu_objset_type(objset_t *os) | |
76 | { | |
77 | return (os->os->os_phys->os_type); | |
78 | } | |
79 | ||
80 | void | |
81 | dmu_objset_name(objset_t *os, char *buf) | |
82 | { | |
83 | dsl_dataset_name(os->os->os_dsl_dataset, buf); | |
84 | } | |
85 | ||
86 | uint64_t | |
87 | dmu_objset_id(objset_t *os) | |
88 | { | |
89 | dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
90 | ||
91 | return (ds ? ds->ds_object : 0); | |
92 | } | |
93 | ||
94 | static void | |
95 | checksum_changed_cb(void *arg, uint64_t newval) | |
96 | { | |
97 | objset_impl_t *osi = arg; | |
98 | ||
99 | /* | |
100 | * Inheritance should have been done by now. | |
101 | */ | |
102 | ASSERT(newval != ZIO_CHECKSUM_INHERIT); | |
103 | ||
104 | osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); | |
105 | } | |
106 | ||
107 | static void | |
108 | compression_changed_cb(void *arg, uint64_t newval) | |
109 | { | |
110 | objset_impl_t *osi = arg; | |
111 | ||
112 | /* | |
113 | * Inheritance and range checking should have been done by now. | |
114 | */ | |
115 | ASSERT(newval != ZIO_COMPRESS_INHERIT); | |
116 | ||
117 | osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE); | |
118 | } | |
119 | ||
120 | static void | |
121 | copies_changed_cb(void *arg, uint64_t newval) | |
122 | { | |
123 | objset_impl_t *osi = arg; | |
124 | ||
125 | /* | |
126 | * Inheritance and range checking should have been done by now. | |
127 | */ | |
128 | ASSERT(newval > 0); | |
129 | ASSERT(newval <= spa_max_replication(osi->os_spa)); | |
130 | ||
131 | osi->os_copies = newval; | |
132 | } | |
133 | ||
b128c09f BB |
134 | static void |
135 | primary_cache_changed_cb(void *arg, uint64_t newval) | |
136 | { | |
137 | objset_impl_t *osi = arg; | |
138 | ||
139 | /* | |
140 | * Inheritance and range checking should have been done by now. | |
141 | */ | |
142 | ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || | |
143 | newval == ZFS_CACHE_METADATA); | |
144 | ||
145 | osi->os_primary_cache = newval; | |
146 | } | |
147 | ||
148 | static void | |
149 | secondary_cache_changed_cb(void *arg, uint64_t newval) | |
150 | { | |
151 | objset_impl_t *osi = arg; | |
152 | ||
153 | /* | |
154 | * Inheritance and range checking should have been done by now. | |
155 | */ | |
156 | ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || | |
157 | newval == ZFS_CACHE_METADATA); | |
158 | ||
159 | osi->os_secondary_cache = newval; | |
160 | } | |
161 | ||
34dc7c2f BB |
162 | void |
163 | dmu_objset_byteswap(void *buf, size_t size) | |
164 | { | |
165 | objset_phys_t *osp = buf; | |
166 | ||
167 | ASSERT(size == sizeof (objset_phys_t)); | |
168 | dnode_byteswap(&osp->os_meta_dnode); | |
169 | byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); | |
170 | osp->os_type = BSWAP_64(osp->os_type); | |
171 | } | |
172 | ||
173 | int | |
174 | dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, | |
175 | objset_impl_t **osip) | |
176 | { | |
177 | objset_impl_t *osi; | |
b128c09f | 178 | int i, err; |
34dc7c2f BB |
179 | |
180 | ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); | |
181 | ||
182 | osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP); | |
183 | osi->os.os = osi; | |
184 | osi->os_dsl_dataset = ds; | |
185 | osi->os_spa = spa; | |
186 | osi->os_rootbp = bp; | |
187 | if (!BP_IS_HOLE(osi->os_rootbp)) { | |
188 | uint32_t aflags = ARC_WAIT; | |
189 | zbookmark_t zb; | |
190 | zb.zb_objset = ds ? ds->ds_object : 0; | |
191 | zb.zb_object = 0; | |
192 | zb.zb_level = -1; | |
193 | zb.zb_blkid = 0; | |
b128c09f BB |
194 | if (DMU_OS_IS_L2CACHEABLE(osi)) |
195 | aflags |= ARC_L2CACHE; | |
34dc7c2f BB |
196 | |
197 | dprintf_bp(osi->os_rootbp, "reading %s", ""); | |
b128c09f BB |
198 | /* |
199 | * NB: when bprewrite scrub can change the bp, | |
200 | * and this is called from dmu_objset_open_ds_os, the bp | |
201 | * could change, and we'll need a lock. | |
202 | */ | |
203 | err = arc_read_nolock(NULL, spa, osi->os_rootbp, | |
34dc7c2f BB |
204 | arc_getbuf_func, &osi->os_phys_buf, |
205 | ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb); | |
206 | if (err) { | |
207 | kmem_free(osi, sizeof (objset_impl_t)); | |
b128c09f BB |
208 | /* convert checksum errors into IO errors */ |
209 | if (err == ECKSUM) | |
210 | err = EIO; | |
34dc7c2f BB |
211 | return (err); |
212 | } | |
213 | osi->os_phys = osi->os_phys_buf->b_data; | |
34dc7c2f BB |
214 | } else { |
215 | osi->os_phys_buf = arc_buf_alloc(spa, sizeof (objset_phys_t), | |
216 | &osi->os_phys_buf, ARC_BUFC_METADATA); | |
217 | osi->os_phys = osi->os_phys_buf->b_data; | |
218 | bzero(osi->os_phys, sizeof (objset_phys_t)); | |
219 | } | |
220 | ||
221 | /* | |
222 | * Note: the changed_cb will be called once before the register | |
223 | * func returns, thus changing the checksum/compression from the | |
b128c09f BB |
224 | * default (fletcher2/off). Snapshots don't need to know about |
225 | * checksum/compression/copies. | |
34dc7c2f | 226 | */ |
b128c09f BB |
227 | if (ds) { |
228 | err = dsl_prop_register(ds, "primarycache", | |
229 | primary_cache_changed_cb, osi); | |
34dc7c2f | 230 | if (err == 0) |
b128c09f BB |
231 | err = dsl_prop_register(ds, "secondarycache", |
232 | secondary_cache_changed_cb, osi); | |
233 | if (!dsl_dataset_is_snapshot(ds)) { | |
234 | if (err == 0) | |
235 | err = dsl_prop_register(ds, "checksum", | |
236 | checksum_changed_cb, osi); | |
237 | if (err == 0) | |
238 | err = dsl_prop_register(ds, "compression", | |
239 | compression_changed_cb, osi); | |
240 | if (err == 0) | |
241 | err = dsl_prop_register(ds, "copies", | |
242 | copies_changed_cb, osi); | |
243 | } | |
34dc7c2f BB |
244 | if (err) { |
245 | VERIFY(arc_buf_remove_ref(osi->os_phys_buf, | |
246 | &osi->os_phys_buf) == 1); | |
247 | kmem_free(osi, sizeof (objset_impl_t)); | |
248 | return (err); | |
249 | } | |
250 | } else if (ds == NULL) { | |
251 | /* It's the meta-objset. */ | |
252 | osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4; | |
253 | osi->os_compress = ZIO_COMPRESS_LZJB; | |
254 | osi->os_copies = spa_max_replication(spa); | |
b128c09f BB |
255 | osi->os_primary_cache = ZFS_CACHE_ALL; |
256 | osi->os_secondary_cache = ZFS_CACHE_ALL; | |
34dc7c2f BB |
257 | } |
258 | ||
b128c09f BB |
259 | osi->os_zil_header = osi->os_phys->os_zil_header; |
260 | osi->os_zil = zil_alloc(&osi->os, &osi->os_zil_header); | |
34dc7c2f BB |
261 | |
262 | for (i = 0; i < TXG_SIZE; i++) { | |
263 | list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t), | |
264 | offsetof(dnode_t, dn_dirty_link[i])); | |
265 | list_create(&osi->os_free_dnodes[i], sizeof (dnode_t), | |
266 | offsetof(dnode_t, dn_dirty_link[i])); | |
267 | } | |
268 | list_create(&osi->os_dnodes, sizeof (dnode_t), | |
269 | offsetof(dnode_t, dn_link)); | |
270 | list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), | |
271 | offsetof(dmu_buf_impl_t, db_link)); | |
272 | ||
273 | mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL); | |
274 | mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); | |
275 | mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); | |
276 | ||
277 | osi->os_meta_dnode = dnode_special_open(osi, | |
278 | &osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT); | |
279 | ||
280 | /* | |
281 | * We should be the only thread trying to do this because we | |
282 | * have ds_opening_lock | |
283 | */ | |
284 | if (ds) { | |
285 | VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi, | |
286 | dmu_objset_evict)); | |
287 | } | |
288 | ||
289 | *osip = osi; | |
290 | return (0); | |
291 | } | |
292 | ||
293 | static int | |
294 | dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type) | |
295 | { | |
296 | objset_impl_t *osi; | |
34dc7c2f BB |
297 | |
298 | mutex_enter(&ds->ds_opening_lock); | |
299 | osi = dsl_dataset_get_user_ptr(ds); | |
300 | if (osi == NULL) { | |
b128c09f BB |
301 | int err; |
302 | ||
34dc7c2f BB |
303 | err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), |
304 | ds, &ds->ds_phys->ds_bp, &osi); | |
b128c09f BB |
305 | if (err) { |
306 | mutex_exit(&ds->ds_opening_lock); | |
34dc7c2f | 307 | return (err); |
b128c09f | 308 | } |
34dc7c2f BB |
309 | } |
310 | mutex_exit(&ds->ds_opening_lock); | |
311 | ||
312 | os->os = osi; | |
b128c09f | 313 | os->os_mode = DS_MODE_NOHOLD; |
34dc7c2f BB |
314 | |
315 | if (type != DMU_OST_ANY && type != os->os->os_phys->os_type) | |
316 | return (EINVAL); | |
317 | return (0); | |
318 | } | |
319 | ||
320 | int | |
321 | dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp) | |
322 | { | |
323 | objset_t *os; | |
324 | int err; | |
325 | ||
326 | os = kmem_alloc(sizeof (objset_t), KM_SLEEP); | |
327 | err = dmu_objset_open_ds_os(ds, os, type); | |
328 | if (err) | |
329 | kmem_free(os, sizeof (objset_t)); | |
330 | else | |
331 | *osp = os; | |
332 | return (err); | |
333 | } | |
334 | ||
335 | /* called from zpl */ | |
336 | int | |
337 | dmu_objset_open(const char *name, dmu_objset_type_t type, int mode, | |
338 | objset_t **osp) | |
339 | { | |
340 | objset_t *os; | |
341 | dsl_dataset_t *ds; | |
342 | int err; | |
343 | ||
b128c09f BB |
344 | ASSERT(DS_MODE_TYPE(mode) == DS_MODE_USER || |
345 | DS_MODE_TYPE(mode) == DS_MODE_OWNER); | |
34dc7c2f BB |
346 | |
347 | os = kmem_alloc(sizeof (objset_t), KM_SLEEP); | |
b128c09f BB |
348 | if (DS_MODE_TYPE(mode) == DS_MODE_USER) |
349 | err = dsl_dataset_hold(name, os, &ds); | |
350 | else | |
351 | err = dsl_dataset_own(name, mode, os, &ds); | |
34dc7c2f BB |
352 | if (err) { |
353 | kmem_free(os, sizeof (objset_t)); | |
354 | return (err); | |
355 | } | |
356 | ||
357 | err = dmu_objset_open_ds_os(ds, os, type); | |
34dc7c2f | 358 | if (err) { |
b128c09f BB |
359 | if (DS_MODE_TYPE(mode) == DS_MODE_USER) |
360 | dsl_dataset_rele(ds, os); | |
361 | else | |
362 | dsl_dataset_disown(ds, os); | |
34dc7c2f | 363 | kmem_free(os, sizeof (objset_t)); |
34dc7c2f | 364 | } else { |
b128c09f | 365 | os->os_mode = mode; |
34dc7c2f BB |
366 | *osp = os; |
367 | } | |
368 | return (err); | |
369 | } | |
370 | ||
371 | void | |
372 | dmu_objset_close(objset_t *os) | |
373 | { | |
b128c09f BB |
374 | ASSERT(DS_MODE_TYPE(os->os_mode) == DS_MODE_USER || |
375 | DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER || | |
376 | DS_MODE_TYPE(os->os_mode) == DS_MODE_NOHOLD); | |
377 | ||
378 | if (DS_MODE_TYPE(os->os_mode) == DS_MODE_USER) | |
379 | dsl_dataset_rele(os->os->os_dsl_dataset, os); | |
380 | else if (DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER) | |
381 | dsl_dataset_disown(os->os->os_dsl_dataset, os); | |
34dc7c2f BB |
382 | kmem_free(os, sizeof (objset_t)); |
383 | } | |
384 | ||
385 | int | |
386 | dmu_objset_evict_dbufs(objset_t *os) | |
387 | { | |
388 | objset_impl_t *osi = os->os; | |
389 | dnode_t *dn; | |
390 | ||
391 | mutex_enter(&osi->os_lock); | |
392 | ||
393 | /* process the mdn last, since the other dnodes have holds on it */ | |
394 | list_remove(&osi->os_dnodes, osi->os_meta_dnode); | |
395 | list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode); | |
396 | ||
397 | /* | |
398 | * Find the first dnode with holds. We have to do this dance | |
399 | * because dnode_add_ref() only works if you already have a | |
400 | * hold. If there are no holds then it has no dbufs so OK to | |
401 | * skip. | |
402 | */ | |
403 | for (dn = list_head(&osi->os_dnodes); | |
404 | dn && !dnode_add_ref(dn, FTAG); | |
405 | dn = list_next(&osi->os_dnodes, dn)) | |
406 | continue; | |
407 | ||
408 | while (dn) { | |
409 | dnode_t *next_dn = dn; | |
410 | ||
411 | do { | |
412 | next_dn = list_next(&osi->os_dnodes, next_dn); | |
413 | } while (next_dn && !dnode_add_ref(next_dn, FTAG)); | |
414 | ||
415 | mutex_exit(&osi->os_lock); | |
416 | dnode_evict_dbufs(dn); | |
417 | dnode_rele(dn, FTAG); | |
418 | mutex_enter(&osi->os_lock); | |
419 | dn = next_dn; | |
420 | } | |
421 | mutex_exit(&osi->os_lock); | |
422 | return (list_head(&osi->os_dnodes) != osi->os_meta_dnode); | |
423 | } | |
424 | ||
425 | void | |
426 | dmu_objset_evict(dsl_dataset_t *ds, void *arg) | |
427 | { | |
428 | objset_impl_t *osi = arg; | |
429 | objset_t os; | |
430 | int i; | |
431 | ||
432 | for (i = 0; i < TXG_SIZE; i++) { | |
433 | ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL); | |
434 | ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL); | |
435 | } | |
436 | ||
b128c09f BB |
437 | if (ds) { |
438 | if (!dsl_dataset_is_snapshot(ds)) { | |
439 | VERIFY(0 == dsl_prop_unregister(ds, "checksum", | |
440 | checksum_changed_cb, osi)); | |
441 | VERIFY(0 == dsl_prop_unregister(ds, "compression", | |
442 | compression_changed_cb, osi)); | |
443 | VERIFY(0 == dsl_prop_unregister(ds, "copies", | |
444 | copies_changed_cb, osi)); | |
445 | } | |
446 | VERIFY(0 == dsl_prop_unregister(ds, "primarycache", | |
447 | primary_cache_changed_cb, osi)); | |
448 | VERIFY(0 == dsl_prop_unregister(ds, "secondarycache", | |
449 | secondary_cache_changed_cb, osi)); | |
34dc7c2f BB |
450 | } |
451 | ||
452 | /* | |
453 | * We should need only a single pass over the dnode list, since | |
454 | * nothing can be added to the list at this point. | |
455 | */ | |
456 | os.os = osi; | |
457 | (void) dmu_objset_evict_dbufs(&os); | |
458 | ||
459 | ASSERT3P(list_head(&osi->os_dnodes), ==, osi->os_meta_dnode); | |
460 | ASSERT3P(list_tail(&osi->os_dnodes), ==, osi->os_meta_dnode); | |
461 | ASSERT3P(list_head(&osi->os_meta_dnode->dn_dbufs), ==, NULL); | |
462 | ||
463 | dnode_special_close(osi->os_meta_dnode); | |
464 | zil_free(osi->os_zil); | |
465 | ||
466 | VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1); | |
467 | mutex_destroy(&osi->os_lock); | |
468 | mutex_destroy(&osi->os_obj_lock); | |
469 | mutex_destroy(&osi->os_user_ptr_lock); | |
470 | kmem_free(osi, sizeof (objset_impl_t)); | |
471 | } | |
472 | ||
473 | /* called from dsl for meta-objset */ | |
474 | objset_impl_t * | |
475 | dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, | |
476 | dmu_objset_type_t type, dmu_tx_t *tx) | |
477 | { | |
478 | objset_impl_t *osi; | |
479 | dnode_t *mdn; | |
480 | ||
481 | ASSERT(dmu_tx_is_syncing(tx)); | |
482 | if (ds) | |
483 | mutex_enter(&ds->ds_opening_lock); | |
484 | VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi)); | |
485 | if (ds) | |
486 | mutex_exit(&ds->ds_opening_lock); | |
487 | mdn = osi->os_meta_dnode; | |
488 | ||
489 | dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT, | |
490 | DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx); | |
491 | ||
492 | /* | |
493 | * We don't want to have to increase the meta-dnode's nlevels | |
494 | * later, because then we could do it in quescing context while | |
495 | * we are also accessing it in open context. | |
496 | * | |
497 | * This precaution is not necessary for the MOS (ds == NULL), | |
498 | * because the MOS is only updated in syncing context. | |
499 | * This is most fortunate: the MOS is the only objset that | |
500 | * needs to be synced multiple times as spa_sync() iterates | |
501 | * to convergence, so minimizing its dn_nlevels matters. | |
502 | */ | |
503 | if (ds != NULL) { | |
504 | int levels = 1; | |
505 | ||
506 | /* | |
507 | * Determine the number of levels necessary for the meta-dnode | |
508 | * to contain DN_MAX_OBJECT dnodes. | |
509 | */ | |
510 | while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift + | |
511 | (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < | |
512 | DN_MAX_OBJECT * sizeof (dnode_phys_t)) | |
513 | levels++; | |
514 | ||
515 | mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = | |
516 | mdn->dn_nlevels = levels; | |
517 | } | |
518 | ||
519 | ASSERT(type != DMU_OST_NONE); | |
520 | ASSERT(type != DMU_OST_ANY); | |
521 | ASSERT(type < DMU_OST_NUMTYPES); | |
522 | osi->os_phys->os_type = type; | |
523 | ||
524 | dsl_dataset_dirty(ds, tx); | |
525 | ||
526 | return (osi); | |
527 | } | |
528 | ||
529 | struct oscarg { | |
530 | void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); | |
531 | void *userarg; | |
532 | dsl_dataset_t *clone_parent; | |
533 | const char *lastname; | |
534 | dmu_objset_type_t type; | |
535 | uint64_t flags; | |
536 | }; | |
537 | ||
538 | /*ARGSUSED*/ | |
539 | static int | |
540 | dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
541 | { | |
542 | dsl_dir_t *dd = arg1; | |
543 | struct oscarg *oa = arg2; | |
544 | objset_t *mos = dd->dd_pool->dp_meta_objset; | |
545 | int err; | |
546 | uint64_t ddobj; | |
547 | ||
548 | err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj, | |
549 | oa->lastname, sizeof (uint64_t), 1, &ddobj); | |
550 | if (err != ENOENT) | |
551 | return (err ? err : EEXIST); | |
552 | ||
553 | if (oa->clone_parent != NULL) { | |
554 | /* | |
555 | * You can't clone across pools. | |
556 | */ | |
557 | if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool) | |
558 | return (EXDEV); | |
559 | ||
560 | /* | |
561 | * You can only clone snapshots, not the head datasets. | |
562 | */ | |
563 | if (oa->clone_parent->ds_phys->ds_num_children == 0) | |
564 | return (EINVAL); | |
565 | } | |
566 | ||
567 | return (0); | |
568 | } | |
569 | ||
570 | static void | |
571 | dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) | |
572 | { | |
573 | dsl_dir_t *dd = arg1; | |
574 | struct oscarg *oa = arg2; | |
575 | dsl_dataset_t *ds; | |
576 | blkptr_t *bp; | |
577 | uint64_t dsobj; | |
578 | ||
579 | ASSERT(dmu_tx_is_syncing(tx)); | |
580 | ||
581 | dsobj = dsl_dataset_create_sync(dd, oa->lastname, | |
582 | oa->clone_parent, oa->flags, cr, tx); | |
583 | ||
b128c09f | 584 | VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, dsobj, FTAG, &ds)); |
34dc7c2f BB |
585 | bp = dsl_dataset_get_blkptr(ds); |
586 | if (BP_IS_HOLE(bp)) { | |
587 | objset_impl_t *osi; | |
588 | ||
589 | /* This is an empty dmu_objset; not a clone. */ | |
590 | osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds), | |
591 | ds, bp, oa->type, tx); | |
592 | ||
593 | if (oa->userfunc) | |
594 | oa->userfunc(&osi->os, oa->userarg, cr, tx); | |
595 | } | |
596 | ||
597 | spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa, | |
598 | tx, cr, "dataset = %llu", dsobj); | |
599 | ||
b128c09f | 600 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
601 | } |
602 | ||
603 | int | |
604 | dmu_objset_create(const char *name, dmu_objset_type_t type, | |
605 | objset_t *clone_parent, uint64_t flags, | |
606 | void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg) | |
607 | { | |
608 | dsl_dir_t *pdd; | |
609 | const char *tail; | |
610 | int err = 0; | |
611 | struct oscarg oa = { 0 }; | |
612 | ||
613 | ASSERT(strchr(name, '@') == NULL); | |
614 | err = dsl_dir_open(name, FTAG, &pdd, &tail); | |
615 | if (err) | |
616 | return (err); | |
617 | if (tail == NULL) { | |
618 | dsl_dir_close(pdd, FTAG); | |
619 | return (EEXIST); | |
620 | } | |
621 | ||
622 | dprintf("name=%s\n", name); | |
623 | ||
624 | oa.userfunc = func; | |
625 | oa.userarg = arg; | |
626 | oa.lastname = tail; | |
627 | oa.type = type; | |
628 | oa.flags = flags; | |
629 | ||
630 | if (clone_parent != NULL) { | |
631 | /* | |
632 | * You can't clone to a different type. | |
633 | */ | |
634 | if (clone_parent->os->os_phys->os_type != type) { | |
635 | dsl_dir_close(pdd, FTAG); | |
636 | return (EINVAL); | |
637 | } | |
638 | oa.clone_parent = clone_parent->os->os_dsl_dataset; | |
639 | } | |
640 | err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check, | |
641 | dmu_objset_create_sync, pdd, &oa, 5); | |
642 | dsl_dir_close(pdd, FTAG); | |
643 | return (err); | |
644 | } | |
645 | ||
646 | int | |
647 | dmu_objset_destroy(const char *name) | |
648 | { | |
649 | objset_t *os; | |
650 | int error; | |
651 | ||
652 | /* | |
653 | * If it looks like we'll be able to destroy it, and there's | |
654 | * an unplayed replay log sitting around, destroy the log. | |
655 | * It would be nicer to do this in dsl_dataset_destroy_sync(), | |
656 | * but the replay log objset is modified in open context. | |
657 | */ | |
658 | error = dmu_objset_open(name, DMU_OST_ANY, | |
b128c09f | 659 | DS_MODE_OWNER|DS_MODE_READONLY|DS_MODE_INCONSISTENT, &os); |
34dc7c2f BB |
660 | if (error == 0) { |
661 | dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
662 | zil_destroy(dmu_objset_zil(os), B_FALSE); | |
663 | ||
b128c09f | 664 | error = dsl_dataset_destroy(ds, os); |
34dc7c2f BB |
665 | /* |
666 | * dsl_dataset_destroy() closes the ds. | |
34dc7c2f BB |
667 | */ |
668 | kmem_free(os, sizeof (objset_t)); | |
34dc7c2f BB |
669 | } |
670 | ||
671 | return (error); | |
672 | } | |
673 | ||
674 | /* | |
675 | * This will close the objset. | |
676 | */ | |
677 | int | |
678 | dmu_objset_rollback(objset_t *os) | |
679 | { | |
680 | int err; | |
681 | dsl_dataset_t *ds; | |
682 | ||
683 | ds = os->os->os_dsl_dataset; | |
684 | ||
b128c09f | 685 | if (!dsl_dataset_tryown(ds, TRUE, os)) { |
34dc7c2f BB |
686 | dmu_objset_close(os); |
687 | return (EBUSY); | |
688 | } | |
689 | ||
690 | err = dsl_dataset_rollback(ds, os->os->os_phys->os_type); | |
691 | ||
692 | /* | |
693 | * NB: we close the objset manually because the rollback | |
694 | * actually implicitly called dmu_objset_evict(), thus freeing | |
695 | * the objset_impl_t. | |
696 | */ | |
b128c09f | 697 | dsl_dataset_disown(ds, os); |
34dc7c2f BB |
698 | kmem_free(os, sizeof (objset_t)); |
699 | return (err); | |
700 | } | |
701 | ||
702 | struct snaparg { | |
703 | dsl_sync_task_group_t *dstg; | |
704 | char *snapname; | |
705 | char failed[MAXPATHLEN]; | |
706 | boolean_t checkperms; | |
707 | list_t objsets; | |
708 | }; | |
709 | ||
710 | struct osnode { | |
711 | list_node_t node; | |
712 | objset_t *os; | |
713 | }; | |
714 | ||
715 | static int | |
716 | dmu_objset_snapshot_one(char *name, void *arg) | |
717 | { | |
718 | struct snaparg *sn = arg; | |
719 | objset_t *os; | |
34dc7c2f BB |
720 | int err; |
721 | ||
722 | (void) strcpy(sn->failed, name); | |
723 | ||
724 | /* | |
725 | * Check permissions only when requested. This only applies when | |
726 | * doing a recursive snapshot. The permission checks for the starting | |
727 | * dataset have already been performed in zfs_secpolicy_snapshot() | |
728 | */ | |
729 | if (sn->checkperms == B_TRUE && | |
730 | (err = zfs_secpolicy_snapshot_perms(name, CRED()))) | |
731 | return (err); | |
732 | ||
b128c09f | 733 | err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os); |
34dc7c2f BB |
734 | if (err != 0) |
735 | return (err); | |
736 | ||
b128c09f BB |
737 | /* If the objset is in an inconsistent state, return busy */ |
738 | if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) { | |
34dc7c2f BB |
739 | dmu_objset_close(os); |
740 | return (EBUSY); | |
741 | } | |
742 | ||
743 | /* | |
744 | * NB: we need to wait for all in-flight changes to get to disk, | |
745 | * so that we snapshot those changes. zil_suspend does this as | |
746 | * a side effect. | |
747 | */ | |
748 | err = zil_suspend(dmu_objset_zil(os)); | |
749 | if (err == 0) { | |
750 | struct osnode *osn; | |
751 | dsl_sync_task_create(sn->dstg, dsl_dataset_snapshot_check, | |
752 | dsl_dataset_snapshot_sync, os->os->os_dsl_dataset, | |
753 | sn->snapname, 3); | |
754 | osn = kmem_alloc(sizeof (struct osnode), KM_SLEEP); | |
755 | osn->os = os; | |
756 | list_insert_tail(&sn->objsets, osn); | |
757 | } else { | |
758 | dmu_objset_close(os); | |
759 | } | |
760 | ||
761 | return (err); | |
762 | } | |
763 | ||
764 | int | |
765 | dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive) | |
766 | { | |
767 | dsl_sync_task_t *dst; | |
768 | struct osnode *osn; | |
769 | struct snaparg sn = { 0 }; | |
770 | spa_t *spa; | |
771 | int err; | |
772 | ||
773 | (void) strcpy(sn.failed, fsname); | |
774 | ||
775 | err = spa_open(fsname, &spa, FTAG); | |
776 | if (err) | |
777 | return (err); | |
778 | ||
779 | sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
780 | sn.snapname = snapname; | |
781 | list_create(&sn.objsets, sizeof (struct osnode), | |
782 | offsetof(struct osnode, node)); | |
783 | ||
784 | if (recursive) { | |
785 | sn.checkperms = B_TRUE; | |
786 | err = dmu_objset_find(fsname, | |
787 | dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN); | |
788 | } else { | |
789 | sn.checkperms = B_FALSE; | |
790 | err = dmu_objset_snapshot_one(fsname, &sn); | |
791 | } | |
792 | ||
793 | if (err) | |
794 | goto out; | |
795 | ||
796 | err = dsl_sync_task_group_wait(sn.dstg); | |
797 | ||
798 | for (dst = list_head(&sn.dstg->dstg_tasks); dst; | |
799 | dst = list_next(&sn.dstg->dstg_tasks, dst)) { | |
800 | dsl_dataset_t *ds = dst->dst_arg1; | |
801 | if (dst->dst_err) | |
802 | dsl_dataset_name(ds, sn.failed); | |
803 | } | |
804 | ||
805 | out: | |
806 | while (osn = list_head(&sn.objsets)) { | |
807 | list_remove(&sn.objsets, osn); | |
808 | zil_resume(dmu_objset_zil(osn->os)); | |
809 | dmu_objset_close(osn->os); | |
810 | kmem_free(osn, sizeof (struct osnode)); | |
811 | } | |
812 | list_destroy(&sn.objsets); | |
813 | ||
814 | if (err) | |
815 | (void) strcpy(fsname, sn.failed); | |
816 | dsl_sync_task_group_destroy(sn.dstg); | |
817 | spa_close(spa, FTAG); | |
818 | return (err); | |
819 | } | |
820 | ||
821 | static void | |
822 | dmu_objset_sync_dnodes(list_t *list, dmu_tx_t *tx) | |
823 | { | |
824 | dnode_t *dn; | |
825 | ||
826 | while (dn = list_head(list)) { | |
827 | ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); | |
828 | ASSERT(dn->dn_dbuf->db_data_pending); | |
829 | /* | |
830 | * Initialize dn_zio outside dnode_sync() | |
831 | * to accomodate meta-dnode | |
832 | */ | |
833 | dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; | |
834 | ASSERT(dn->dn_zio); | |
835 | ||
836 | ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); | |
837 | list_remove(list, dn); | |
838 | dnode_sync(dn, tx); | |
839 | } | |
840 | } | |
841 | ||
842 | /* ARGSUSED */ | |
843 | static void | |
844 | ready(zio_t *zio, arc_buf_t *abuf, void *arg) | |
845 | { | |
b128c09f BB |
846 | blkptr_t *bp = zio->io_bp; |
847 | blkptr_t *bp_orig = &zio->io_bp_orig; | |
34dc7c2f | 848 | objset_impl_t *os = arg; |
34dc7c2f | 849 | dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; |
34dc7c2f | 850 | |
b128c09f BB |
851 | ASSERT(bp == os->os_rootbp); |
852 | ASSERT(BP_GET_TYPE(bp) == DMU_OT_OBJSET); | |
853 | ASSERT(BP_GET_LEVEL(bp) == 0); | |
34dc7c2f BB |
854 | |
855 | /* | |
856 | * Update rootbp fill count. | |
857 | */ | |
858 | bp->blk_fill = 1; /* count the meta-dnode */ | |
b128c09f | 859 | for (int i = 0; i < dnp->dn_nblkptr; i++) |
34dc7c2f BB |
860 | bp->blk_fill += dnp->dn_blkptr[i].blk_fill; |
861 | ||
b128c09f BB |
862 | if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { |
863 | ASSERT(DVA_EQUAL(BP_IDENTITY(bp), BP_IDENTITY(bp_orig))); | |
864 | } else { | |
34dc7c2f | 865 | if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg) |
b128c09f BB |
866 | (void) dsl_dataset_block_kill(os->os_dsl_dataset, |
867 | &zio->io_bp_orig, zio, os->os_synctx); | |
34dc7c2f BB |
868 | dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx); |
869 | } | |
870 | } | |
871 | ||
34dc7c2f BB |
872 | /* called from dsl */ |
873 | void | |
874 | dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx) | |
875 | { | |
876 | int txgoff; | |
877 | zbookmark_t zb; | |
b128c09f | 878 | writeprops_t wp = { 0 }; |
34dc7c2f BB |
879 | zio_t *zio; |
880 | list_t *list; | |
881 | dbuf_dirty_record_t *dr; | |
882 | ||
883 | dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg); | |
884 | ||
885 | ASSERT(dmu_tx_is_syncing(tx)); | |
886 | /* XXX the write_done callback should really give us the tx... */ | |
887 | os->os_synctx = tx; | |
888 | ||
889 | if (os->os_dsl_dataset == NULL) { | |
890 | /* | |
891 | * This is the MOS. If we have upgraded, | |
892 | * spa_max_replication() could change, so reset | |
893 | * os_copies here. | |
894 | */ | |
895 | os->os_copies = spa_max_replication(os->os_spa); | |
896 | } | |
897 | ||
898 | /* | |
899 | * Create the root block IO | |
900 | */ | |
901 | zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0; | |
902 | zb.zb_object = 0; | |
b128c09f | 903 | zb.zb_level = -1; /* for block ordering; it's level 0 on disk */ |
34dc7c2f | 904 | zb.zb_blkid = 0; |
b128c09f BB |
905 | |
906 | wp.wp_type = DMU_OT_OBJSET; | |
907 | wp.wp_level = 0; /* on-disk BP level; see above */ | |
908 | wp.wp_copies = os->os_copies; | |
909 | wp.wp_oschecksum = os->os_checksum; | |
910 | wp.wp_oscompress = os->os_compress; | |
911 | ||
34dc7c2f | 912 | if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) { |
b128c09f | 913 | (void) dsl_dataset_block_kill(os->os_dsl_dataset, |
34dc7c2f BB |
914 | os->os_rootbp, pio, tx); |
915 | } | |
b128c09f BB |
916 | |
917 | arc_release(os->os_phys_buf, &os->os_phys_buf); | |
918 | zio = arc_write(pio, os->os_spa, &wp, DMU_OS_IS_L2CACHEABLE(os), | |
919 | tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, NULL, os, | |
920 | ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); | |
34dc7c2f BB |
921 | |
922 | /* | |
923 | * Sync meta-dnode - the parent IO for the sync is the root block | |
924 | */ | |
925 | os->os_meta_dnode->dn_zio = zio; | |
926 | dnode_sync(os->os_meta_dnode, tx); | |
927 | ||
928 | txgoff = tx->tx_txg & TXG_MASK; | |
929 | ||
930 | dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], tx); | |
931 | dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], tx); | |
932 | ||
933 | list = &os->os_meta_dnode->dn_dirty_records[txgoff]; | |
934 | while (dr = list_head(list)) { | |
935 | ASSERT(dr->dr_dbuf->db_level == 0); | |
936 | list_remove(list, dr); | |
937 | if (dr->dr_zio) | |
938 | zio_nowait(dr->dr_zio); | |
939 | } | |
940 | /* | |
941 | * Free intent log blocks up to this tx. | |
942 | */ | |
943 | zil_sync(os->os_zil, tx); | |
b128c09f | 944 | os->os_phys->os_zil_header = os->os_zil_header; |
34dc7c2f BB |
945 | zio_nowait(zio); |
946 | } | |
947 | ||
948 | void | |
949 | dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, | |
950 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
951 | { | |
952 | dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp, | |
953 | usedobjsp, availobjsp); | |
954 | } | |
955 | ||
956 | uint64_t | |
957 | dmu_objset_fsid_guid(objset_t *os) | |
958 | { | |
959 | return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset)); | |
960 | } | |
961 | ||
962 | void | |
963 | dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) | |
964 | { | |
965 | stat->dds_type = os->os->os_phys->os_type; | |
966 | if (os->os->os_dsl_dataset) | |
967 | dsl_dataset_fast_stat(os->os->os_dsl_dataset, stat); | |
968 | } | |
969 | ||
970 | void | |
971 | dmu_objset_stats(objset_t *os, nvlist_t *nv) | |
972 | { | |
973 | ASSERT(os->os->os_dsl_dataset || | |
974 | os->os->os_phys->os_type == DMU_OST_META); | |
975 | ||
976 | if (os->os->os_dsl_dataset != NULL) | |
977 | dsl_dataset_stats(os->os->os_dsl_dataset, nv); | |
978 | ||
979 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, | |
980 | os->os->os_phys->os_type); | |
981 | } | |
982 | ||
983 | int | |
984 | dmu_objset_is_snapshot(objset_t *os) | |
985 | { | |
986 | if (os->os->os_dsl_dataset != NULL) | |
987 | return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset)); | |
988 | else | |
989 | return (B_FALSE); | |
990 | } | |
991 | ||
992 | int | |
993 | dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen, | |
994 | boolean_t *conflict) | |
995 | { | |
996 | dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
997 | uint64_t ignored; | |
998 | ||
999 | if (ds->ds_phys->ds_snapnames_zapobj == 0) | |
1000 | return (ENOENT); | |
1001 | ||
1002 | return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, | |
1003 | ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST, | |
1004 | real, maxlen, conflict)); | |
1005 | } | |
1006 | ||
1007 | int | |
1008 | dmu_snapshot_list_next(objset_t *os, int namelen, char *name, | |
1009 | uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) | |
1010 | { | |
1011 | dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
1012 | zap_cursor_t cursor; | |
1013 | zap_attribute_t attr; | |
1014 | ||
1015 | if (ds->ds_phys->ds_snapnames_zapobj == 0) | |
1016 | return (ENOENT); | |
1017 | ||
1018 | zap_cursor_init_serialized(&cursor, | |
1019 | ds->ds_dir->dd_pool->dp_meta_objset, | |
1020 | ds->ds_phys->ds_snapnames_zapobj, *offp); | |
1021 | ||
1022 | if (zap_cursor_retrieve(&cursor, &attr) != 0) { | |
1023 | zap_cursor_fini(&cursor); | |
1024 | return (ENOENT); | |
1025 | } | |
1026 | ||
1027 | if (strlen(attr.za_name) + 1 > namelen) { | |
1028 | zap_cursor_fini(&cursor); | |
1029 | return (ENAMETOOLONG); | |
1030 | } | |
1031 | ||
1032 | (void) strcpy(name, attr.za_name); | |
1033 | if (idp) | |
1034 | *idp = attr.za_first_integer; | |
1035 | if (case_conflict) | |
1036 | *case_conflict = attr.za_normalization_conflict; | |
1037 | zap_cursor_advance(&cursor); | |
1038 | *offp = zap_cursor_serialize(&cursor); | |
1039 | zap_cursor_fini(&cursor); | |
1040 | ||
1041 | return (0); | |
1042 | } | |
1043 | ||
1044 | int | |
1045 | dmu_dir_list_next(objset_t *os, int namelen, char *name, | |
1046 | uint64_t *idp, uint64_t *offp) | |
1047 | { | |
1048 | dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir; | |
1049 | zap_cursor_t cursor; | |
1050 | zap_attribute_t attr; | |
1051 | ||
1052 | /* there is no next dir on a snapshot! */ | |
1053 | if (os->os->os_dsl_dataset->ds_object != | |
1054 | dd->dd_phys->dd_head_dataset_obj) | |
1055 | return (ENOENT); | |
1056 | ||
1057 | zap_cursor_init_serialized(&cursor, | |
1058 | dd->dd_pool->dp_meta_objset, | |
1059 | dd->dd_phys->dd_child_dir_zapobj, *offp); | |
1060 | ||
1061 | if (zap_cursor_retrieve(&cursor, &attr) != 0) { | |
1062 | zap_cursor_fini(&cursor); | |
1063 | return (ENOENT); | |
1064 | } | |
1065 | ||
1066 | if (strlen(attr.za_name) + 1 > namelen) { | |
1067 | zap_cursor_fini(&cursor); | |
1068 | return (ENAMETOOLONG); | |
1069 | } | |
1070 | ||
1071 | (void) strcpy(name, attr.za_name); | |
1072 | if (idp) | |
1073 | *idp = attr.za_first_integer; | |
1074 | zap_cursor_advance(&cursor); | |
1075 | *offp = zap_cursor_serialize(&cursor); | |
1076 | zap_cursor_fini(&cursor); | |
1077 | ||
1078 | return (0); | |
1079 | } | |
1080 | ||
b128c09f BB |
1081 | struct findarg { |
1082 | int (*func)(char *, void *); | |
1083 | void *arg; | |
1084 | }; | |
1085 | ||
1086 | /* ARGSUSED */ | |
1087 | static int | |
1088 | findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg) | |
1089 | { | |
1090 | struct findarg *fa = arg; | |
1091 | return (fa->func((char *)dsname, fa->arg)); | |
1092 | } | |
1093 | ||
34dc7c2f BB |
1094 | /* |
1095 | * Find all objsets under name, and for each, call 'func(child_name, arg)'. | |
b128c09f | 1096 | * Perhaps change all callers to use dmu_objset_find_spa()? |
34dc7c2f BB |
1097 | */ |
1098 | int | |
1099 | dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags) | |
b128c09f BB |
1100 | { |
1101 | struct findarg fa; | |
1102 | fa.func = func; | |
1103 | fa.arg = arg; | |
1104 | return (dmu_objset_find_spa(NULL, name, findfunc, &fa, flags)); | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Find all objsets under name, call func on each | |
1109 | */ | |
1110 | int | |
1111 | dmu_objset_find_spa(spa_t *spa, const char *name, | |
1112 | int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags) | |
34dc7c2f BB |
1113 | { |
1114 | dsl_dir_t *dd; | |
b128c09f BB |
1115 | dsl_pool_t *dp; |
1116 | dsl_dataset_t *ds; | |
34dc7c2f BB |
1117 | zap_cursor_t zc; |
1118 | zap_attribute_t *attr; | |
1119 | char *child; | |
b128c09f BB |
1120 | uint64_t thisobj; |
1121 | int err; | |
34dc7c2f | 1122 | |
b128c09f BB |
1123 | if (name == NULL) |
1124 | name = spa_name(spa); | |
1125 | err = dsl_dir_open_spa(spa, name, FTAG, &dd, NULL); | |
34dc7c2f BB |
1126 | if (err) |
1127 | return (err); | |
1128 | ||
b128c09f BB |
1129 | /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ |
1130 | if (dd->dd_myname[0] == '$') { | |
1131 | dsl_dir_close(dd, FTAG); | |
1132 | return (0); | |
1133 | } | |
1134 | ||
1135 | thisobj = dd->dd_phys->dd_head_dataset_obj; | |
34dc7c2f | 1136 | attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); |
b128c09f | 1137 | dp = dd->dd_pool; |
34dc7c2f BB |
1138 | |
1139 | /* | |
1140 | * Iterate over all children. | |
1141 | */ | |
1142 | if (flags & DS_FIND_CHILDREN) { | |
b128c09f | 1143 | for (zap_cursor_init(&zc, dp->dp_meta_objset, |
34dc7c2f BB |
1144 | dd->dd_phys->dd_child_dir_zapobj); |
1145 | zap_cursor_retrieve(&zc, attr) == 0; | |
1146 | (void) zap_cursor_advance(&zc)) { | |
1147 | ASSERT(attr->za_integer_length == sizeof (uint64_t)); | |
1148 | ASSERT(attr->za_num_integers == 1); | |
1149 | ||
34dc7c2f | 1150 | child = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
b128c09f | 1151 | (void) strcpy(child, name); |
34dc7c2f BB |
1152 | (void) strcat(child, "/"); |
1153 | (void) strcat(child, attr->za_name); | |
b128c09f | 1154 | err = dmu_objset_find_spa(spa, child, func, arg, flags); |
34dc7c2f BB |
1155 | kmem_free(child, MAXPATHLEN); |
1156 | if (err) | |
1157 | break; | |
1158 | } | |
1159 | zap_cursor_fini(&zc); | |
1160 | ||
1161 | if (err) { | |
1162 | dsl_dir_close(dd, FTAG); | |
1163 | kmem_free(attr, sizeof (zap_attribute_t)); | |
1164 | return (err); | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * Iterate over all snapshots. | |
1170 | */ | |
b128c09f BB |
1171 | if (flags & DS_FIND_SNAPSHOTS) { |
1172 | if (!dsl_pool_sync_context(dp)) | |
1173 | rw_enter(&dp->dp_config_rwlock, RW_READER); | |
1174 | err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); | |
1175 | if (!dsl_pool_sync_context(dp)) | |
1176 | rw_exit(&dp->dp_config_rwlock); | |
1177 | ||
1178 | if (err == 0) { | |
1179 | uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; | |
1180 | dsl_dataset_rele(ds, FTAG); | |
1181 | ||
1182 | for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); | |
1183 | zap_cursor_retrieve(&zc, attr) == 0; | |
1184 | (void) zap_cursor_advance(&zc)) { | |
1185 | ASSERT(attr->za_integer_length == | |
1186 | sizeof (uint64_t)); | |
1187 | ASSERT(attr->za_num_integers == 1); | |
1188 | ||
1189 | child = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1190 | (void) strcpy(child, name); | |
1191 | (void) strcat(child, "@"); | |
1192 | (void) strcat(child, attr->za_name); | |
1193 | err = func(spa, attr->za_first_integer, | |
1194 | child, arg); | |
1195 | kmem_free(child, MAXPATHLEN); | |
1196 | if (err) | |
1197 | break; | |
1198 | } | |
1199 | zap_cursor_fini(&zc); | |
34dc7c2f | 1200 | } |
34dc7c2f BB |
1201 | } |
1202 | ||
1203 | dsl_dir_close(dd, FTAG); | |
1204 | kmem_free(attr, sizeof (zap_attribute_t)); | |
1205 | ||
1206 | if (err) | |
1207 | return (err); | |
1208 | ||
1209 | /* | |
1210 | * Apply to self if appropriate. | |
1211 | */ | |
b128c09f | 1212 | err = func(spa, thisobj, name, arg); |
34dc7c2f BB |
1213 | return (err); |
1214 | } | |
1215 | ||
1216 | void | |
1217 | dmu_objset_set_user(objset_t *os, void *user_ptr) | |
1218 | { | |
1219 | ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock)); | |
1220 | os->os->os_user_ptr = user_ptr; | |
1221 | } | |
1222 | ||
1223 | void * | |
1224 | dmu_objset_get_user(objset_t *os) | |
1225 | { | |
1226 | ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock)); | |
1227 | return (os->os->os_user_ptr); | |
1228 | } |