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70e083d2 TG |
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 | */ | |
86e3c28a | 21 | |
70e083d2 TG |
22 | /* |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
86e3c28a | 24 | * Copyright (c) 2011, 2016 by Delphix. All rights reserved. |
70e083d2 TG |
25 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
26 | * Copyright (c) 2014 RackTop Systems. | |
27 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. | |
28 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. | |
86e3c28a CIK |
29 | * Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved. |
30 | * Copyright 2017 Nexenta Systems, Inc. | |
70e083d2 TG |
31 | */ |
32 | ||
33 | #include <sys/dmu_objset.h> | |
34 | #include <sys/dsl_dataset.h> | |
35 | #include <sys/dsl_dir.h> | |
36 | #include <sys/dsl_prop.h> | |
37 | #include <sys/dsl_synctask.h> | |
38 | #include <sys/dmu_traverse.h> | |
39 | #include <sys/dmu_impl.h> | |
40 | #include <sys/dmu_tx.h> | |
41 | #include <sys/arc.h> | |
42 | #include <sys/zio.h> | |
43 | #include <sys/zap.h> | |
44 | #include <sys/zfeature.h> | |
45 | #include <sys/unique.h> | |
46 | #include <sys/zfs_context.h> | |
47 | #include <sys/zfs_ioctl.h> | |
48 | #include <sys/spa.h> | |
49 | #include <sys/zfs_znode.h> | |
50 | #include <sys/zfs_onexit.h> | |
51 | #include <sys/zvol.h> | |
52 | #include <sys/dsl_scan.h> | |
53 | #include <sys/dsl_deadlist.h> | |
54 | #include <sys/dsl_destroy.h> | |
55 | #include <sys/dsl_userhold.h> | |
56 | #include <sys/dsl_bookmark.h> | |
86e3c28a CIK |
57 | #include <sys/policy.h> |
58 | #include <sys/dmu_send.h> | |
59 | #include <sys/zio_compress.h> | |
60 | #include <zfs_fletcher.h> | |
61 | #include <sys/zio_checksum.h> | |
70e083d2 TG |
62 | |
63 | /* | |
64 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
65 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
66 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
67 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
68 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
69 | * and pools with larger blocks can always be imported and used, regardless | |
70 | * of this setting. | |
71 | */ | |
72 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
73 | ||
74 | #define SWITCH64(x, y) \ | |
75 | { \ | |
76 | uint64_t __tmp = (x); \ | |
77 | (x) = (y); \ | |
78 | (y) = __tmp; \ | |
79 | } | |
80 | ||
81 | #define DS_REF_MAX (1ULL << 62) | |
82 | ||
83 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); | |
84 | ||
86e3c28a CIK |
85 | extern int spa_asize_inflation; |
86 | ||
87 | static zil_header_t zero_zil; | |
88 | ||
70e083d2 | 89 | /* |
86e3c28a | 90 | * Figure out how much of this delta should be propagated to the dsl_dir |
70e083d2 TG |
91 | * layer. If there's a refreservation, that space has already been |
92 | * partially accounted for in our ancestors. | |
93 | */ | |
94 | static int64_t | |
95 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
96 | { | |
97 | dsl_dataset_phys_t *ds_phys; | |
98 | uint64_t old_bytes, new_bytes; | |
99 | ||
100 | if (ds->ds_reserved == 0) | |
101 | return (delta); | |
102 | ||
103 | ds_phys = dsl_dataset_phys(ds); | |
104 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
105 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
106 | ||
107 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
108 | return (new_bytes - old_bytes); | |
109 | } | |
110 | ||
111 | void | |
112 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) | |
113 | { | |
114 | int used, compressed, uncompressed; | |
115 | int64_t delta; | |
86e3c28a | 116 | spa_feature_t f; |
70e083d2 TG |
117 | |
118 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); | |
119 | compressed = BP_GET_PSIZE(bp); | |
120 | uncompressed = BP_GET_UCSIZE(bp); | |
121 | ||
122 | dprintf_bp(bp, "ds=%p", ds); | |
123 | ||
124 | ASSERT(dmu_tx_is_syncing(tx)); | |
125 | /* It could have been compressed away to nothing */ | |
126 | if (BP_IS_HOLE(bp)) | |
127 | return; | |
128 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
129 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); | |
130 | if (ds == NULL) { | |
131 | dsl_pool_mos_diduse_space(tx->tx_pool, | |
132 | used, compressed, uncompressed); | |
133 | return; | |
134 | } | |
135 | ||
86e3c28a | 136 | ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); |
70e083d2 TG |
137 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
138 | mutex_enter(&ds->ds_lock); | |
139 | delta = parent_delta(ds, used); | |
140 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; | |
141 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
142 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
143 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
86e3c28a CIK |
144 | |
145 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { | |
146 | ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = | |
147 | B_TRUE; | |
148 | } | |
149 | ||
150 | f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); | |
151 | if (f != SPA_FEATURE_NONE) | |
152 | ds->ds_feature_activation_needed[f] = B_TRUE; | |
153 | ||
70e083d2 TG |
154 | mutex_exit(&ds->ds_lock); |
155 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, | |
156 | compressed, uncompressed, tx); | |
157 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
158 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
159 | } | |
160 | ||
161 | int | |
162 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, | |
163 | boolean_t async) | |
164 | { | |
165 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); | |
166 | int compressed = BP_GET_PSIZE(bp); | |
167 | int uncompressed = BP_GET_UCSIZE(bp); | |
168 | ||
169 | if (BP_IS_HOLE(bp)) | |
170 | return (0); | |
171 | ||
172 | ASSERT(dmu_tx_is_syncing(tx)); | |
173 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
174 | ||
175 | if (ds == NULL) { | |
176 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
177 | dsl_pool_mos_diduse_space(tx->tx_pool, | |
178 | -used, -compressed, -uncompressed); | |
179 | return (used); | |
180 | } | |
181 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
182 | ||
183 | ASSERT(!ds->ds_is_snapshot); | |
184 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
185 | ||
186 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { | |
187 | int64_t delta; | |
188 | ||
189 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); | |
190 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
191 | ||
192 | mutex_enter(&ds->ds_lock); | |
193 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || | |
194 | !DS_UNIQUE_IS_ACCURATE(ds)); | |
195 | delta = parent_delta(ds, -used); | |
196 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; | |
197 | mutex_exit(&ds->ds_lock); | |
198 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, | |
199 | delta, -compressed, -uncompressed, tx); | |
200 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, | |
201 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
202 | } else { | |
203 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
204 | if (async) { | |
205 | /* | |
206 | * We are here as part of zio's write done callback, | |
207 | * which means we're a zio interrupt thread. We can't | |
208 | * call dsl_deadlist_insert() now because it may block | |
209 | * waiting for I/O. Instead, put bp on the deferred | |
210 | * queue and let dsl_pool_sync() finish the job. | |
211 | */ | |
212 | bplist_append(&ds->ds_pending_deadlist, bp); | |
213 | } else { | |
214 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
215 | } | |
216 | ASSERT3U(ds->ds_prev->ds_object, ==, | |
217 | dsl_dataset_phys(ds)->ds_prev_snap_obj); | |
218 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
219 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ | |
220 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
221 | ds->ds_object && bp->blk_birth > | |
222 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { | |
223 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
224 | mutex_enter(&ds->ds_prev->ds_lock); | |
225 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; | |
226 | mutex_exit(&ds->ds_prev->ds_lock); | |
227 | } | |
228 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { | |
229 | dsl_dir_transfer_space(ds->ds_dir, used, | |
230 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
231 | } | |
232 | } | |
233 | mutex_enter(&ds->ds_lock); | |
234 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); | |
235 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
236 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
237 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
238 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
239 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
240 | mutex_exit(&ds->ds_lock); | |
241 | ||
242 | return (used); | |
243 | } | |
244 | ||
86e3c28a CIK |
245 | /* |
246 | * We have to release the fsid syncronously or we risk that a subsequent | |
247 | * mount of the same dataset will fail to unique_insert the fsid. This | |
248 | * failure would manifest itself as the fsid of this dataset changing | |
249 | * between mounts which makes NFS clients quite unhappy. | |
250 | */ | |
251 | static void | |
252 | dsl_dataset_evict_sync(void *dbu) | |
70e083d2 | 253 | { |
86e3c28a | 254 | dsl_dataset_t *ds = dbu; |
70e083d2 | 255 | |
86e3c28a | 256 | ASSERT(ds->ds_owner == NULL); |
70e083d2 | 257 | |
86e3c28a | 258 | unique_remove(ds->ds_fsid_guid); |
70e083d2 TG |
259 | } |
260 | ||
261 | static void | |
86e3c28a | 262 | dsl_dataset_evict_async(void *dbu) |
70e083d2 TG |
263 | { |
264 | dsl_dataset_t *ds = dbu; | |
265 | ||
266 | ASSERT(ds->ds_owner == NULL); | |
267 | ||
268 | ds->ds_dbuf = NULL; | |
269 | ||
70e083d2 TG |
270 | if (ds->ds_objset != NULL) |
271 | dmu_objset_evict(ds->ds_objset); | |
272 | ||
273 | if (ds->ds_prev) { | |
274 | dsl_dataset_rele(ds->ds_prev, ds); | |
275 | ds->ds_prev = NULL; | |
276 | } | |
277 | ||
278 | bplist_destroy(&ds->ds_pending_deadlist); | |
279 | if (ds->ds_deadlist.dl_os != NULL) | |
280 | dsl_deadlist_close(&ds->ds_deadlist); | |
281 | if (ds->ds_dir) | |
282 | dsl_dir_async_rele(ds->ds_dir, ds); | |
283 | ||
284 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
285 | ||
86e3c28a | 286 | list_destroy(&ds->ds_prop_cbs); |
70e083d2 TG |
287 | mutex_destroy(&ds->ds_lock); |
288 | mutex_destroy(&ds->ds_opening_lock); | |
289 | mutex_destroy(&ds->ds_sendstream_lock); | |
290 | refcount_destroy(&ds->ds_longholds); | |
86e3c28a | 291 | rrw_destroy(&ds->ds_bp_rwlock); |
70e083d2 TG |
292 | |
293 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
294 | } | |
295 | ||
296 | int | |
297 | dsl_dataset_get_snapname(dsl_dataset_t *ds) | |
298 | { | |
299 | dsl_dataset_phys_t *headphys; | |
300 | int err; | |
301 | dmu_buf_t *headdbuf; | |
302 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
303 | objset_t *mos = dp->dp_meta_objset; | |
304 | ||
305 | if (ds->ds_snapname[0]) | |
306 | return (0); | |
307 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) | |
308 | return (0); | |
309 | ||
310 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, | |
311 | FTAG, &headdbuf); | |
312 | if (err != 0) | |
313 | return (err); | |
314 | headphys = headdbuf->db_data; | |
315 | err = zap_value_search(dp->dp_meta_objset, | |
316 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
317 | if (err != 0 && zfs_recover == B_TRUE) { | |
318 | err = 0; | |
319 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
320 | "SNAPOBJ=%llu-ERR=%d", | |
321 | (unsigned long long)ds->ds_object, err); | |
322 | } | |
323 | dmu_buf_rele(headdbuf, FTAG); | |
324 | return (err); | |
325 | } | |
326 | ||
327 | int | |
328 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) | |
329 | { | |
330 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
331 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; | |
86e3c28a | 332 | matchtype_t mt = 0; |
70e083d2 TG |
333 | int err; |
334 | ||
335 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) | |
86e3c28a | 336 | mt = MT_NORMALIZE; |
70e083d2 TG |
337 | |
338 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, | |
339 | value, mt, NULL, 0, NULL); | |
86e3c28a | 340 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
70e083d2 TG |
341 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
342 | return (err); | |
343 | } | |
344 | ||
345 | int | |
346 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, | |
347 | boolean_t adj_cnt) | |
348 | { | |
349 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
350 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; | |
86e3c28a | 351 | matchtype_t mt = 0; |
70e083d2 TG |
352 | int err; |
353 | ||
354 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
355 | ||
356 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) | |
86e3c28a | 357 | mt = MT_NORMALIZE; |
70e083d2 TG |
358 | |
359 | err = zap_remove_norm(mos, snapobj, name, mt, tx); | |
86e3c28a | 360 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
70e083d2 TG |
361 | err = zap_remove(mos, snapobj, name, tx); |
362 | ||
363 | if (err == 0 && adj_cnt) | |
364 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
365 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
366 | ||
367 | return (err); | |
368 | } | |
369 | ||
370 | boolean_t | |
371 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
372 | { | |
373 | dmu_buf_t *dbuf = ds->ds_dbuf; | |
374 | boolean_t result = B_FALSE; | |
375 | ||
376 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
377 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
378 | ||
379 | if (ds == dmu_buf_get_user(dbuf)) | |
380 | result = B_TRUE; | |
381 | else | |
382 | dmu_buf_rele(dbuf, tag); | |
383 | } | |
384 | ||
385 | return (result); | |
386 | } | |
387 | ||
388 | int | |
389 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, | |
390 | dsl_dataset_t **dsp) | |
391 | { | |
392 | objset_t *mos = dp->dp_meta_objset; | |
393 | dmu_buf_t *dbuf; | |
394 | dsl_dataset_t *ds; | |
395 | int err; | |
396 | dmu_object_info_t doi; | |
397 | ||
398 | ASSERT(dsl_pool_config_held(dp)); | |
399 | ||
400 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
401 | if (err != 0) | |
402 | return (err); | |
403 | ||
404 | /* Make sure dsobj has the correct object type. */ | |
405 | dmu_object_info_from_db(dbuf, &doi); | |
406 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { | |
407 | dmu_buf_rele(dbuf, tag); | |
408 | return (SET_ERROR(EINVAL)); | |
409 | } | |
410 | ||
411 | ds = dmu_buf_get_user(dbuf); | |
412 | if (ds == NULL) { | |
413 | dsl_dataset_t *winner = NULL; | |
414 | ||
415 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
416 | ds->ds_dbuf = dbuf; | |
417 | ds->ds_object = dsobj; | |
418 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; | |
419 | list_link_init(&ds->ds_synced_link); | |
420 | ||
421 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
422 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
423 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); | |
86e3c28a | 424 | rrw_init(&ds->ds_bp_rwlock, B_FALSE); |
70e083d2 TG |
425 | refcount_create(&ds->ds_longholds); |
426 | ||
427 | bplist_create(&ds->ds_pending_deadlist); | |
428 | dsl_deadlist_open(&ds->ds_deadlist, | |
429 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); | |
430 | ||
431 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), | |
432 | offsetof(dmu_sendarg_t, dsa_link)); | |
433 | ||
86e3c28a CIK |
434 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
435 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
436 | ||
70e083d2 | 437 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
86e3c28a CIK |
438 | spa_feature_t f; |
439 | ||
440 | for (f = 0; f < SPA_FEATURES; f++) { | |
441 | if (!(spa_feature_table[f].fi_flags & | |
442 | ZFEATURE_FLAG_PER_DATASET)) | |
443 | continue; | |
444 | err = zap_contains(mos, dsobj, | |
445 | spa_feature_table[f].fi_guid); | |
446 | if (err == 0) { | |
447 | ds->ds_feature_inuse[f] = B_TRUE; | |
448 | } else { | |
449 | ASSERT3U(err, ==, ENOENT); | |
450 | err = 0; | |
451 | } | |
70e083d2 TG |
452 | } |
453 | } | |
454 | ||
86e3c28a CIK |
455 | err = dsl_dir_hold_obj(dp, |
456 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
70e083d2 TG |
457 | if (err != 0) { |
458 | mutex_destroy(&ds->ds_lock); | |
459 | mutex_destroy(&ds->ds_opening_lock); | |
460 | mutex_destroy(&ds->ds_sendstream_lock); | |
461 | refcount_destroy(&ds->ds_longholds); | |
462 | bplist_destroy(&ds->ds_pending_deadlist); | |
463 | dsl_deadlist_close(&ds->ds_deadlist); | |
464 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
465 | dmu_buf_rele(dbuf, tag); | |
466 | return (err); | |
467 | } | |
468 | ||
469 | if (!ds->ds_is_snapshot) { | |
470 | ds->ds_snapname[0] = '\0'; | |
471 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { | |
472 | err = dsl_dataset_hold_obj(dp, | |
473 | dsl_dataset_phys(ds)->ds_prev_snap_obj, | |
474 | ds, &ds->ds_prev); | |
475 | } | |
476 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { | |
477 | int zaperr = zap_lookup(mos, ds->ds_object, | |
478 | DS_FIELD_BOOKMARK_NAMES, | |
479 | sizeof (ds->ds_bookmarks), 1, | |
480 | &ds->ds_bookmarks); | |
481 | if (zaperr != ENOENT) | |
482 | VERIFY0(zaperr); | |
483 | } | |
484 | } else { | |
485 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
486 | err = dsl_dataset_get_snapname(ds); | |
487 | if (err == 0 && | |
488 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
489 | err = zap_count( | |
490 | ds->ds_dir->dd_pool->dp_meta_objset, | |
491 | dsl_dataset_phys(ds)->ds_userrefs_obj, | |
492 | &ds->ds_userrefs); | |
493 | } | |
494 | } | |
495 | ||
496 | if (err == 0 && !ds->ds_is_snapshot) { | |
497 | err = dsl_prop_get_int_ds(ds, | |
498 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
499 | &ds->ds_reserved); | |
500 | if (err == 0) { | |
501 | err = dsl_prop_get_int_ds(ds, | |
502 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
503 | &ds->ds_quota); | |
504 | } | |
505 | } else { | |
506 | ds->ds_reserved = ds->ds_quota = 0; | |
507 | } | |
508 | ||
86e3c28a CIK |
509 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync, |
510 | dsl_dataset_evict_async, &ds->ds_dbuf); | |
70e083d2 TG |
511 | if (err == 0) |
512 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
513 | ||
514 | if (err != 0 || winner != NULL) { | |
515 | bplist_destroy(&ds->ds_pending_deadlist); | |
516 | dsl_deadlist_close(&ds->ds_deadlist); | |
517 | if (ds->ds_prev) | |
518 | dsl_dataset_rele(ds->ds_prev, ds); | |
519 | dsl_dir_rele(ds->ds_dir, ds); | |
520 | mutex_destroy(&ds->ds_lock); | |
521 | mutex_destroy(&ds->ds_opening_lock); | |
522 | mutex_destroy(&ds->ds_sendstream_lock); | |
523 | refcount_destroy(&ds->ds_longholds); | |
524 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
525 | if (err != 0) { | |
526 | dmu_buf_rele(dbuf, tag); | |
527 | return (err); | |
528 | } | |
529 | ds = winner; | |
530 | } else { | |
531 | ds->ds_fsid_guid = | |
532 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); | |
86e3c28a CIK |
533 | if (ds->ds_fsid_guid != |
534 | dsl_dataset_phys(ds)->ds_fsid_guid) { | |
535 | zfs_dbgmsg("ds_fsid_guid changed from " | |
536 | "%llx to %llx for pool %s dataset id %llu", | |
537 | (long long) | |
538 | dsl_dataset_phys(ds)->ds_fsid_guid, | |
539 | (long long)ds->ds_fsid_guid, | |
540 | spa_name(dp->dp_spa), | |
541 | dsobj); | |
542 | } | |
70e083d2 TG |
543 | } |
544 | } | |
545 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
546 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); | |
547 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
548 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || | |
549 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
550 | *dsp = ds; | |
551 | return (0); | |
552 | } | |
553 | ||
554 | int | |
555 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, | |
556 | void *tag, dsl_dataset_t **dsp) | |
557 | { | |
558 | dsl_dir_t *dd; | |
559 | const char *snapname; | |
560 | uint64_t obj; | |
561 | int err = 0; | |
86e3c28a | 562 | dsl_dataset_t *ds; |
70e083d2 TG |
563 | |
564 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); | |
565 | if (err != 0) | |
566 | return (err); | |
567 | ||
568 | ASSERT(dsl_pool_config_held(dp)); | |
569 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; | |
570 | if (obj != 0) | |
86e3c28a | 571 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
70e083d2 TG |
572 | else |
573 | err = SET_ERROR(ENOENT); | |
574 | ||
575 | /* we may be looking for a snapshot */ | |
576 | if (err == 0 && snapname != NULL) { | |
86e3c28a | 577 | dsl_dataset_t *snap_ds; |
70e083d2 TG |
578 | |
579 | if (*snapname++ != '@') { | |
86e3c28a | 580 | dsl_dataset_rele(ds, tag); |
70e083d2 TG |
581 | dsl_dir_rele(dd, FTAG); |
582 | return (SET_ERROR(ENOENT)); | |
583 | } | |
584 | ||
585 | dprintf("looking for snapshot '%s'\n", snapname); | |
86e3c28a | 586 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
70e083d2 | 587 | if (err == 0) |
86e3c28a CIK |
588 | err = dsl_dataset_hold_obj(dp, obj, tag, &snap_ds); |
589 | dsl_dataset_rele(ds, tag); | |
70e083d2 TG |
590 | |
591 | if (err == 0) { | |
86e3c28a CIK |
592 | mutex_enter(&snap_ds->ds_lock); |
593 | if (snap_ds->ds_snapname[0] == 0) | |
594 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
595 | sizeof (snap_ds->ds_snapname)); | |
596 | mutex_exit(&snap_ds->ds_lock); | |
597 | ds = snap_ds; | |
70e083d2 TG |
598 | } |
599 | } | |
86e3c28a CIK |
600 | if (err == 0) |
601 | *dsp = ds; | |
70e083d2 TG |
602 | dsl_dir_rele(dd, FTAG); |
603 | return (err); | |
604 | } | |
605 | ||
606 | int | |
607 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, | |
608 | void *tag, dsl_dataset_t **dsp) | |
609 | { | |
610 | int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); | |
611 | if (err != 0) | |
612 | return (err); | |
613 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
614 | dsl_dataset_rele(*dsp, tag); | |
615 | *dsp = NULL; | |
616 | return (SET_ERROR(EBUSY)); | |
617 | } | |
618 | return (0); | |
619 | } | |
620 | ||
621 | int | |
622 | dsl_dataset_own(dsl_pool_t *dp, const char *name, | |
623 | void *tag, dsl_dataset_t **dsp) | |
624 | { | |
625 | int err = dsl_dataset_hold(dp, name, tag, dsp); | |
626 | if (err != 0) | |
627 | return (err); | |
628 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
629 | dsl_dataset_rele(*dsp, tag); | |
630 | return (SET_ERROR(EBUSY)); | |
631 | } | |
632 | return (0); | |
633 | } | |
634 | ||
635 | /* | |
636 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
637 | * hold is used to prevent destruction of a dataset while the pool hold | |
638 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
639 | * | |
640 | * The dataset and pool must be held when this function is called. After it | |
641 | * is called, the pool hold may be released while the dataset is still held | |
642 | * and accessed. | |
643 | */ | |
644 | void | |
645 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
646 | { | |
647 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
648 | (void) refcount_add(&ds->ds_longholds, tag); | |
649 | } | |
650 | ||
651 | void | |
652 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
653 | { | |
654 | (void) refcount_remove(&ds->ds_longholds, tag); | |
655 | } | |
656 | ||
657 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
658 | boolean_t | |
659 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
660 | { | |
661 | return (!refcount_is_zero(&ds->ds_longholds)); | |
662 | } | |
663 | ||
664 | void | |
665 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
666 | { | |
667 | if (ds == NULL) { | |
668 | (void) strcpy(name, "mos"); | |
669 | } else { | |
670 | dsl_dir_name(ds->ds_dir, name); | |
671 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
672 | if (ds->ds_snapname[0]) { | |
86e3c28a CIK |
673 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
674 | <, ZFS_MAX_DATASET_NAME_LEN); | |
70e083d2 TG |
675 | /* |
676 | * We use a "recursive" mutex so that we | |
677 | * can call dprintf_ds() with ds_lock held. | |
678 | */ | |
679 | if (!MUTEX_HELD(&ds->ds_lock)) { | |
680 | mutex_enter(&ds->ds_lock); | |
86e3c28a CIK |
681 | VERIFY3U(strlcat(name, ds->ds_snapname, |
682 | ZFS_MAX_DATASET_NAME_LEN), <, | |
683 | ZFS_MAX_DATASET_NAME_LEN); | |
70e083d2 TG |
684 | mutex_exit(&ds->ds_lock); |
685 | } else { | |
86e3c28a CIK |
686 | VERIFY3U(strlcat(name, ds->ds_snapname, |
687 | ZFS_MAX_DATASET_NAME_LEN), <, | |
688 | ZFS_MAX_DATASET_NAME_LEN); | |
70e083d2 TG |
689 | } |
690 | } | |
691 | } | |
692 | } | |
693 | ||
694 | int | |
695 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
696 | { | |
697 | int len; | |
698 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
699 | mutex_enter(&ds->ds_lock); | |
700 | len = strlen(ds->ds_snapname); | |
701 | /* add '@' if ds is a snap */ | |
702 | if (len > 0) | |
703 | len++; | |
704 | len += dsl_dir_namelen(ds->ds_dir); | |
705 | mutex_exit(&ds->ds_lock); | |
706 | return (len); | |
707 | } | |
708 | ||
709 | void | |
710 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) | |
711 | { | |
712 | dmu_buf_rele(ds->ds_dbuf, tag); | |
713 | } | |
714 | ||
715 | void | |
716 | dsl_dataset_disown(dsl_dataset_t *ds, void *tag) | |
717 | { | |
718 | ASSERT3P(ds->ds_owner, ==, tag); | |
719 | ASSERT(ds->ds_dbuf != NULL); | |
720 | ||
721 | mutex_enter(&ds->ds_lock); | |
722 | ds->ds_owner = NULL; | |
723 | mutex_exit(&ds->ds_lock); | |
724 | dsl_dataset_long_rele(ds, tag); | |
725 | dsl_dataset_rele(ds, tag); | |
726 | } | |
727 | ||
728 | boolean_t | |
729 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) | |
730 | { | |
731 | boolean_t gotit = FALSE; | |
732 | ||
86e3c28a | 733 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
70e083d2 TG |
734 | mutex_enter(&ds->ds_lock); |
735 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { | |
736 | ds->ds_owner = tag; | |
737 | dsl_dataset_long_hold(ds, tag); | |
738 | gotit = TRUE; | |
739 | } | |
740 | mutex_exit(&ds->ds_lock); | |
741 | return (gotit); | |
742 | } | |
743 | ||
86e3c28a CIK |
744 | boolean_t |
745 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
746 | { | |
747 | boolean_t rv; | |
748 | mutex_enter(&ds->ds_lock); | |
749 | rv = (ds->ds_owner != NULL); | |
750 | mutex_exit(&ds->ds_lock); | |
751 | return (rv); | |
752 | } | |
753 | ||
754 | static void | |
755 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
756 | { | |
757 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
758 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
759 | uint64_t zero = 0; | |
760 | ||
761 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
762 | ||
763 | spa_feature_incr(spa, f, tx); | |
764 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
765 | ||
766 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
767 | sizeof (zero), 1, &zero, tx)); | |
768 | } | |
769 | ||
770 | void | |
771 | dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
772 | { | |
773 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
774 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
775 | ||
776 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
777 | ||
778 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
779 | spa_feature_decr(spa, f, tx); | |
780 | } | |
781 | ||
70e083d2 TG |
782 | uint64_t |
783 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, | |
784 | uint64_t flags, dmu_tx_t *tx) | |
785 | { | |
786 | dsl_pool_t *dp = dd->dd_pool; | |
787 | dmu_buf_t *dbuf; | |
788 | dsl_dataset_phys_t *dsphys; | |
789 | uint64_t dsobj; | |
790 | objset_t *mos = dp->dp_meta_objset; | |
791 | ||
792 | if (origin == NULL) | |
793 | origin = dp->dp_origin_snap; | |
794 | ||
795 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); | |
796 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); | |
797 | ASSERT(dmu_tx_is_syncing(tx)); | |
798 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); | |
799 | ||
800 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
801 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
802 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); | |
803 | dmu_buf_will_dirty(dbuf, tx); | |
804 | dsphys = dbuf->db_data; | |
805 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); | |
806 | dsphys->ds_dir_obj = dd->dd_object; | |
807 | dsphys->ds_flags = flags; | |
808 | dsphys->ds_fsid_guid = unique_create(); | |
809 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
810 | sizeof (dsphys->ds_guid)); | |
811 | dsphys->ds_snapnames_zapobj = | |
812 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
813 | DMU_OT_NONE, 0, tx); | |
814 | dsphys->ds_creation_time = gethrestime_sec(); | |
815 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; | |
816 | ||
817 | if (origin == NULL) { | |
818 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
819 | } else { | |
86e3c28a | 820 | spa_feature_t f; |
70e083d2 TG |
821 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
822 | ||
823 | dsphys->ds_prev_snap_obj = origin->ds_object; | |
824 | dsphys->ds_prev_snap_txg = | |
825 | dsl_dataset_phys(origin)->ds_creation_txg; | |
826 | dsphys->ds_referenced_bytes = | |
827 | dsl_dataset_phys(origin)->ds_referenced_bytes; | |
828 | dsphys->ds_compressed_bytes = | |
829 | dsl_dataset_phys(origin)->ds_compressed_bytes; | |
830 | dsphys->ds_uncompressed_bytes = | |
831 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; | |
86e3c28a | 832 | rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG); |
70e083d2 | 833 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; |
86e3c28a | 834 | rrw_exit(&origin->ds_bp_rwlock, FTAG); |
70e083d2 TG |
835 | |
836 | /* | |
837 | * Inherit flags that describe the dataset's contents | |
838 | * (INCONSISTENT) or properties (Case Insensitive). | |
839 | */ | |
840 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & | |
841 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); | |
842 | ||
86e3c28a CIK |
843 | for (f = 0; f < SPA_FEATURES; f++) { |
844 | if (origin->ds_feature_inuse[f]) | |
845 | dsl_dataset_activate_feature(dsobj, f, tx); | |
846 | } | |
70e083d2 TG |
847 | |
848 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
849 | dsl_dataset_phys(origin)->ds_num_children++; | |
850 | ||
851 | VERIFY0(dsl_dataset_hold_obj(dp, | |
852 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, | |
853 | FTAG, &ohds)); | |
854 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, | |
855 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
856 | dsl_dataset_rele(ohds, FTAG); | |
857 | ||
858 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { | |
859 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { | |
860 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
861 | zap_create(mos, | |
862 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
863 | } | |
864 | VERIFY0(zap_add_int(mos, | |
865 | dsl_dataset_phys(origin)->ds_next_clones_obj, | |
866 | dsobj, tx)); | |
867 | } | |
868 | ||
869 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
870 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; | |
871 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
872 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { | |
873 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); | |
874 | dsl_dir_phys(origin->ds_dir)->dd_clones = | |
875 | zap_create(mos, | |
876 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
877 | } | |
878 | VERIFY0(zap_add_int(mos, | |
879 | dsl_dir_phys(origin->ds_dir)->dd_clones, | |
880 | dsobj, tx)); | |
881 | } | |
882 | } | |
883 | ||
884 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
885 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
886 | ||
887 | dmu_buf_rele(dbuf, FTAG); | |
888 | ||
889 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
890 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; | |
891 | ||
892 | return (dsobj); | |
893 | } | |
894 | ||
895 | static void | |
896 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
897 | { | |
898 | objset_t *os; | |
899 | ||
900 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
86e3c28a CIK |
901 | if (bcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) { |
902 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
903 | zio_t *zio; | |
904 | ||
905 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
906 | ||
907 | zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
908 | dsl_dataset_sync(ds, zio, tx); | |
909 | VERIFY0(zio_wait(zio)); | |
910 | ||
911 | /* dsl_dataset_sync_done will drop this reference. */ | |
912 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
913 | dsl_dataset_sync_done(ds, tx); | |
914 | } | |
70e083d2 TG |
915 | } |
916 | ||
917 | uint64_t | |
918 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
919 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) | |
920 | { | |
921 | dsl_pool_t *dp = pdd->dd_pool; | |
922 | uint64_t dsobj, ddobj; | |
923 | dsl_dir_t *dd; | |
924 | ||
925 | ASSERT(dmu_tx_is_syncing(tx)); | |
926 | ASSERT(lastname[0] != '@'); | |
927 | ||
928 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); | |
929 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); | |
930 | ||
931 | dsobj = dsl_dataset_create_sync_dd(dd, origin, | |
932 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); | |
933 | ||
934 | dsl_deleg_set_create_perms(dd, tx, cr); | |
935 | ||
936 | /* | |
937 | * Since we're creating a new node we know it's a leaf, so we can | |
938 | * initialize the counts if the limit feature is active. | |
939 | */ | |
940 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
941 | uint64_t cnt = 0; | |
942 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
943 | ||
944 | dsl_dir_zapify(dd, tx); | |
945 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
946 | sizeof (cnt), 1, &cnt, tx)); | |
947 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
948 | sizeof (cnt), 1, &cnt, tx)); | |
949 | } | |
950 | ||
951 | dsl_dir_rele(dd, FTAG); | |
952 | ||
953 | /* | |
954 | * If we are creating a clone, make sure we zero out any stale | |
955 | * data from the origin snapshots zil header. | |
956 | */ | |
957 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { | |
958 | dsl_dataset_t *ds; | |
959 | ||
960 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); | |
961 | dsl_dataset_zero_zil(ds, tx); | |
962 | dsl_dataset_rele(ds, FTAG); | |
963 | } | |
964 | ||
965 | return (dsobj); | |
966 | } | |
967 | ||
968 | /* | |
969 | * The unique space in the head dataset can be calculated by subtracting | |
970 | * the space used in the most recent snapshot, that is still being used | |
971 | * in this file system, from the space currently in use. To figure out | |
972 | * the space in the most recent snapshot still in use, we need to take | |
973 | * the total space used in the snapshot and subtract out the space that | |
974 | * has been freed up since the snapshot was taken. | |
975 | */ | |
976 | void | |
977 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
978 | { | |
979 | uint64_t mrs_used; | |
980 | uint64_t dlused, dlcomp, dluncomp; | |
981 | ||
982 | ASSERT(!ds->ds_is_snapshot); | |
983 | ||
984 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) | |
985 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
986 | else | |
987 | mrs_used = 0; | |
988 | ||
989 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); | |
990 | ||
991 | ASSERT3U(dlused, <=, mrs_used); | |
992 | dsl_dataset_phys(ds)->ds_unique_bytes = | |
993 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
994 | ||
995 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= | |
996 | SPA_VERSION_UNIQUE_ACCURATE) | |
997 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
998 | } | |
999 | ||
1000 | void | |
1001 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
1002 | dmu_tx_t *tx) | |
1003 | { | |
1004 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1005 | int err; | |
1006 | ASSERTV(uint64_t count); | |
1007 | ||
1008 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); | |
1009 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1010 | obj, tx); | |
1011 | /* | |
1012 | * The err should not be ENOENT, but a bug in a previous version | |
1013 | * of the code could cause upgrade_clones_cb() to not set | |
1014 | * ds_next_snap_obj when it should, leading to a missing entry. | |
1015 | * If we knew that the pool was created after | |
1016 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
1017 | * ENOENT. However, at least we can check that we don't have | |
1018 | * too many entries in the next_clones_obj even after failing to | |
1019 | * remove this one. | |
1020 | */ | |
1021 | if (err != ENOENT) | |
1022 | VERIFY0(err); | |
1023 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1024 | &count)); | |
1025 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); | |
1026 | } | |
1027 | ||
1028 | ||
1029 | blkptr_t * | |
1030 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1031 | { | |
1032 | return (&dsl_dataset_phys(ds)->ds_bp); | |
1033 | } | |
1034 | ||
70e083d2 TG |
1035 | spa_t * |
1036 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1037 | { | |
1038 | return (ds->ds_dir->dd_pool->dp_spa); | |
1039 | } | |
1040 | ||
1041 | void | |
1042 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1043 | { | |
1044 | dsl_pool_t *dp; | |
1045 | ||
1046 | if (ds == NULL) /* this is the meta-objset */ | |
1047 | return; | |
1048 | ||
1049 | ASSERT(ds->ds_objset != NULL); | |
1050 | ||
1051 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) | |
1052 | panic("dirtying snapshot!"); | |
1053 | ||
86e3c28a CIK |
1054 | /* Must not dirty a dataset in the same txg where it got snapshotted. */ |
1055 | ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); | |
70e083d2 | 1056 | |
86e3c28a | 1057 | dp = ds->ds_dir->dd_pool; |
70e083d2 TG |
1058 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
1059 | /* up the hold count until we can be written out */ | |
1060 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | boolean_t | |
1065 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
1066 | { | |
1067 | int t; | |
1068 | ||
1069 | for (t = 0; t < TXG_SIZE; t++) { | |
1070 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1071 | ds, t)) | |
1072 | return (B_TRUE); | |
1073 | } | |
1074 | return (B_FALSE); | |
1075 | } | |
1076 | ||
1077 | static int | |
1078 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1079 | { | |
1080 | uint64_t asize; | |
1081 | ||
1082 | if (!dmu_tx_is_syncing(tx)) | |
1083 | return (0); | |
1084 | ||
1085 | /* | |
1086 | * If there's an fs-only reservation, any blocks that might become | |
1087 | * owned by the snapshot dataset must be accommodated by space | |
1088 | * outside of the reservation. | |
1089 | */ | |
1090 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); | |
1091 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); | |
1092 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) | |
1093 | return (SET_ERROR(ENOSPC)); | |
1094 | ||
1095 | /* | |
1096 | * Propagate any reserved space for this snapshot to other | |
1097 | * snapshot checks in this sync group. | |
1098 | */ | |
1099 | if (asize > 0) | |
1100 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
1101 | ||
1102 | return (0); | |
1103 | } | |
1104 | ||
1105 | typedef struct dsl_dataset_snapshot_arg { | |
1106 | nvlist_t *ddsa_snaps; | |
1107 | nvlist_t *ddsa_props; | |
1108 | nvlist_t *ddsa_errors; | |
1109 | cred_t *ddsa_cr; | |
1110 | } dsl_dataset_snapshot_arg_t; | |
1111 | ||
1112 | int | |
1113 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, | |
1114 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) | |
1115 | { | |
1116 | int error; | |
1117 | uint64_t value; | |
1118 | ||
1119 | ds->ds_trysnap_txg = tx->tx_txg; | |
1120 | ||
1121 | if (!dmu_tx_is_syncing(tx)) | |
1122 | return (0); | |
1123 | ||
1124 | /* | |
1125 | * We don't allow multiple snapshots of the same txg. If there | |
1126 | * is already one, try again. | |
1127 | */ | |
1128 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) | |
1129 | return (SET_ERROR(EAGAIN)); | |
1130 | ||
1131 | /* | |
1132 | * Check for conflicting snapshot name. | |
1133 | */ | |
1134 | error = dsl_dataset_snap_lookup(ds, snapname, &value); | |
1135 | if (error == 0) | |
1136 | return (SET_ERROR(EEXIST)); | |
1137 | if (error != ENOENT) | |
1138 | return (error); | |
1139 | ||
1140 | /* | |
1141 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1142 | * those into which we are currently receiving. However, if we are | |
1143 | * creating this snapshot as part of a receive, this check will be | |
1144 | * executed atomically with respect to the completion of the receive | |
1145 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1146 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1147 | * dmu_recv_end_sync(). | |
1148 | */ | |
1149 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1150 | return (SET_ERROR(EBUSY)); | |
1151 | ||
1152 | /* | |
1153 | * Skip the check for temporary snapshots or if we have already checked | |
1154 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1155 | * check the count here when we're receiving a stream. | |
1156 | */ | |
1157 | if (cnt != 0 && cr != NULL) { | |
1158 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1159 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1160 | if (error != 0) | |
1161 | return (error); | |
1162 | } | |
1163 | ||
1164 | error = dsl_dataset_snapshot_reserve_space(ds, tx); | |
1165 | if (error != 0) | |
1166 | return (error); | |
1167 | ||
1168 | return (0); | |
1169 | } | |
1170 | ||
1171 | static int | |
1172 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
1173 | { | |
1174 | dsl_dataset_snapshot_arg_t *ddsa = arg; | |
1175 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1176 | nvpair_t *pair; | |
1177 | int rv = 0; | |
1178 | ||
1179 | /* | |
1180 | * Pre-compute how many total new snapshots will be created for each | |
1181 | * level in the tree and below. This is needed for validating the | |
1182 | * snapshot limit when either taking a recursive snapshot or when | |
1183 | * taking multiple snapshots. | |
1184 | * | |
1185 | * The problem is that the counts are not actually adjusted when | |
1186 | * we are checking, only when we finally sync. For a single snapshot, | |
1187 | * this is easy, the count will increase by 1 at each node up the tree, | |
1188 | * but its more complicated for the recursive/multiple snapshot case. | |
1189 | * | |
1190 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1191 | * at each level up the tree but since it is validating each snapshot | |
1192 | * independently we need to be sure that we are validating the complete | |
1193 | * count for the entire set of snapshots. We do this by rolling up the | |
1194 | * counts for each component of the name into an nvlist and then | |
1195 | * checking each of those cases with the aggregated count. | |
1196 | * | |
1197 | * This approach properly handles not only the recursive snapshot | |
1198 | * case (where we get all of those on the ddsa_snaps list) but also | |
1199 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1200 | * validate the limit on 'a' using a count of 2). | |
1201 | * | |
1202 | * We validate the snapshot names in the third loop and only report | |
1203 | * name errors once. | |
1204 | */ | |
1205 | if (dmu_tx_is_syncing(tx)) { | |
1206 | char *nm; | |
1207 | nvlist_t *cnt_track = NULL; | |
1208 | cnt_track = fnvlist_alloc(); | |
1209 | ||
1210 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1211 | ||
1212 | /* Rollup aggregated counts into the cnt_track list */ | |
1213 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1214 | pair != NULL; | |
1215 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1216 | char *pdelim; | |
1217 | uint64_t val; | |
1218 | ||
1219 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1220 | pdelim = strchr(nm, '@'); | |
1221 | if (pdelim == NULL) | |
1222 | continue; | |
1223 | *pdelim = '\0'; | |
1224 | ||
1225 | do { | |
1226 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1227 | &val) == 0) { | |
1228 | /* update existing entry */ | |
1229 | fnvlist_add_uint64(cnt_track, nm, | |
1230 | val + 1); | |
1231 | } else { | |
1232 | /* add to list */ | |
1233 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1234 | } | |
1235 | ||
1236 | pdelim = strrchr(nm, '/'); | |
1237 | if (pdelim != NULL) | |
1238 | *pdelim = '\0'; | |
1239 | } while (pdelim != NULL); | |
1240 | } | |
1241 | ||
1242 | kmem_free(nm, MAXPATHLEN); | |
1243 | ||
1244 | /* Check aggregated counts at each level */ | |
1245 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1246 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1247 | int error = 0; | |
1248 | char *name; | |
1249 | uint64_t cnt = 0; | |
1250 | dsl_dataset_t *ds; | |
1251 | ||
1252 | name = nvpair_name(pair); | |
1253 | cnt = fnvpair_value_uint64(pair); | |
1254 | ASSERT(cnt > 0); | |
1255 | ||
1256 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1257 | if (error == 0) { | |
1258 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1259 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1260 | ddsa->ddsa_cr); | |
1261 | dsl_dataset_rele(ds, FTAG); | |
1262 | } | |
1263 | ||
1264 | if (error != 0) { | |
1265 | if (ddsa->ddsa_errors != NULL) | |
1266 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1267 | name, error); | |
1268 | rv = error; | |
1269 | /* only report one error for this check */ | |
1270 | break; | |
1271 | } | |
1272 | } | |
1273 | nvlist_free(cnt_track); | |
1274 | } | |
1275 | ||
1276 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1277 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1278 | int error = 0; | |
1279 | dsl_dataset_t *ds; | |
86e3c28a CIK |
1280 | char *name, *atp = NULL; |
1281 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; | |
70e083d2 TG |
1282 | |
1283 | name = nvpair_name(pair); | |
86e3c28a | 1284 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
70e083d2 TG |
1285 | error = SET_ERROR(ENAMETOOLONG); |
1286 | if (error == 0) { | |
1287 | atp = strchr(name, '@'); | |
1288 | if (atp == NULL) | |
1289 | error = SET_ERROR(EINVAL); | |
1290 | if (error == 0) | |
1291 | (void) strlcpy(dsname, name, atp - name + 1); | |
1292 | } | |
1293 | if (error == 0) | |
1294 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1295 | if (error == 0) { | |
1296 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ | |
1297 | error = dsl_dataset_snapshot_check_impl(ds, | |
1298 | atp + 1, tx, B_FALSE, 0, NULL); | |
1299 | dsl_dataset_rele(ds, FTAG); | |
1300 | } | |
1301 | ||
1302 | if (error != 0) { | |
1303 | if (ddsa->ddsa_errors != NULL) { | |
1304 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1305 | name, error); | |
1306 | } | |
1307 | rv = error; | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | return (rv); | |
1312 | } | |
1313 | ||
1314 | void | |
1315 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1316 | dmu_tx_t *tx) | |
1317 | { | |
1318 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1319 | dmu_buf_t *dbuf; | |
1320 | dsl_dataset_phys_t *dsphys; | |
1321 | uint64_t dsobj, crtxg; | |
1322 | objset_t *mos = dp->dp_meta_objset; | |
86e3c28a | 1323 | spa_feature_t f; |
70e083d2 TG |
1324 | ASSERTV(static zil_header_t zero_zil); |
1325 | ASSERTV(objset_t *os); | |
1326 | ||
1327 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
1328 | ||
1329 | /* | |
1330 | * If we are on an old pool, the zil must not be active, in which | |
1331 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
1332 | */ | |
1333 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || | |
1334 | dmu_objset_from_ds(ds, &os) != 0 || | |
1335 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1336 | sizeof (zero_zil)) == 0); | |
1337 | ||
86e3c28a CIK |
1338 | /* Should not snapshot a dirty dataset. */ |
1339 | ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1340 | ds, tx->tx_txg)); | |
1341 | ||
70e083d2 TG |
1342 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
1343 | ||
1344 | /* | |
1345 | * The origin's ds_creation_txg has to be < TXG_INITIAL | |
1346 | */ | |
1347 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1348 | crtxg = 1; | |
1349 | else | |
1350 | crtxg = tx->tx_txg; | |
1351 | ||
1352 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
1353 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
1354 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); | |
1355 | dmu_buf_will_dirty(dbuf, tx); | |
1356 | dsphys = dbuf->db_data; | |
1357 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); | |
1358 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; | |
1359 | dsphys->ds_fsid_guid = unique_create(); | |
1360 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1361 | sizeof (dsphys->ds_guid)); | |
1362 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; | |
1363 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
1364 | dsphys->ds_next_snap_obj = ds->ds_object; | |
1365 | dsphys->ds_num_children = 1; | |
1366 | dsphys->ds_creation_time = gethrestime_sec(); | |
1367 | dsphys->ds_creation_txg = crtxg; | |
1368 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; | |
1369 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1370 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1371 | dsphys->ds_uncompressed_bytes = | |
1372 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1373 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
86e3c28a | 1374 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
70e083d2 | 1375 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; |
86e3c28a | 1376 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
70e083d2 TG |
1377 | dmu_buf_rele(dbuf, FTAG); |
1378 | ||
86e3c28a CIK |
1379 | for (f = 0; f < SPA_FEATURES; f++) { |
1380 | if (ds->ds_feature_inuse[f]) | |
1381 | dsl_dataset_activate_feature(dsobj, f, tx); | |
1382 | } | |
70e083d2 TG |
1383 | |
1384 | ASSERT3U(ds->ds_prev != 0, ==, | |
1385 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
1386 | if (ds->ds_prev) { | |
1387 | uint64_t next_clones_obj = | |
1388 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; | |
1389 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1390 | ds->ds_object || | |
1391 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); | |
1392 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1393 | ds->ds_object) { | |
1394 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
1395 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, | |
1396 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1397 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
1398 | } else if (next_clones_obj != 0) { | |
1399 | dsl_dataset_remove_from_next_clones(ds->ds_prev, | |
1400 | dsphys->ds_next_snap_obj, tx); | |
1401 | VERIFY0(zap_add_int(mos, | |
1402 | next_clones_obj, dsobj, tx)); | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * If we have a reference-reservation on this dataset, we will | |
1408 | * need to increase the amount of refreservation being charged | |
1409 | * since our unique space is going to zero. | |
1410 | */ | |
1411 | if (ds->ds_reserved) { | |
1412 | int64_t delta; | |
1413 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
1414 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, | |
1415 | ds->ds_reserved); | |
1416 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, | |
1417 | delta, 0, 0, tx); | |
1418 | } | |
1419 | ||
1420 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1421 | dsl_dataset_phys(ds)->ds_deadlist_obj = | |
1422 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1423 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
1424 | dsl_deadlist_close(&ds->ds_deadlist); | |
1425 | dsl_deadlist_open(&ds->ds_deadlist, mos, | |
1426 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
1427 | dsl_deadlist_add_key(&ds->ds_deadlist, | |
1428 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); | |
1429 | ||
1430 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); | |
1431 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1432 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1433 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
1434 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
1435 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
1436 | ||
1437 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, | |
1438 | snapname, 8, 1, &dsobj, tx)); | |
1439 | ||
1440 | if (ds->ds_prev) | |
1441 | dsl_dataset_rele(ds->ds_prev, ds); | |
1442 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1443 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); | |
1444 | ||
1445 | dsl_scan_ds_snapshotted(ds, tx); | |
1446 | ||
1447 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
1448 | ||
1449 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); | |
1450 | } | |
1451 | ||
1452 | static void | |
1453 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
1454 | { | |
1455 | dsl_dataset_snapshot_arg_t *ddsa = arg; | |
1456 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1457 | nvpair_t *pair; | |
1458 | ||
1459 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1460 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1461 | dsl_dataset_t *ds; | |
1462 | char *name, *atp; | |
86e3c28a | 1463 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
70e083d2 TG |
1464 | |
1465 | name = nvpair_name(pair); | |
1466 | atp = strchr(name, '@'); | |
1467 | (void) strlcpy(dsname, name, atp - name + 1); | |
1468 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1469 | ||
1470 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1471 | if (ddsa->ddsa_props != NULL) { | |
1472 | dsl_props_set_sync_impl(ds->ds_prev, | |
1473 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1474 | } | |
1475 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); | |
1476 | dsl_dataset_rele(ds, FTAG); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * The snapshots must all be in the same pool. | |
1482 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1483 | */ | |
1484 | int | |
1485 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
1486 | { | |
1487 | dsl_dataset_snapshot_arg_t ddsa; | |
1488 | nvpair_t *pair; | |
1489 | boolean_t needsuspend; | |
1490 | int error; | |
1491 | spa_t *spa; | |
1492 | char *firstname; | |
1493 | nvlist_t *suspended = NULL; | |
1494 | ||
1495 | pair = nvlist_next_nvpair(snaps, NULL); | |
1496 | if (pair == NULL) | |
1497 | return (0); | |
1498 | firstname = nvpair_name(pair); | |
1499 | ||
1500 | error = spa_open(firstname, &spa, FTAG); | |
1501 | if (error != 0) | |
1502 | return (error); | |
1503 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1504 | spa_close(spa, FTAG); | |
1505 | ||
1506 | if (needsuspend) { | |
1507 | suspended = fnvlist_alloc(); | |
1508 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1509 | pair = nvlist_next_nvpair(snaps, pair)) { | |
86e3c28a | 1510 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
70e083d2 TG |
1511 | char *snapname = nvpair_name(pair); |
1512 | char *atp; | |
1513 | void *cookie; | |
1514 | ||
1515 | atp = strchr(snapname, '@'); | |
1516 | if (atp == NULL) { | |
1517 | error = SET_ERROR(EINVAL); | |
1518 | break; | |
1519 | } | |
1520 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1521 | ||
1522 | error = zil_suspend(fsname, &cookie); | |
1523 | if (error != 0) | |
1524 | break; | |
1525 | fnvlist_add_uint64(suspended, fsname, | |
1526 | (uintptr_t)cookie); | |
1527 | } | |
1528 | } | |
1529 | ||
1530 | ddsa.ddsa_snaps = snaps; | |
1531 | ddsa.ddsa_props = props; | |
1532 | ddsa.ddsa_errors = errors; | |
1533 | ddsa.ddsa_cr = CRED(); | |
1534 | ||
1535 | if (error == 0) { | |
1536 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1537 | dsl_dataset_snapshot_sync, &ddsa, | |
1538 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); | |
1539 | } | |
1540 | ||
1541 | if (suspended != NULL) { | |
1542 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1543 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1544 | zil_resume((void *)(uintptr_t) | |
1545 | fnvpair_value_uint64(pair)); | |
1546 | } | |
1547 | fnvlist_free(suspended); | |
1548 | } | |
1549 | ||
1550 | return (error); | |
1551 | } | |
1552 | ||
1553 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1554 | const char *ddsta_fsname; | |
1555 | const char *ddsta_snapname; | |
1556 | minor_t ddsta_cleanup_minor; | |
1557 | const char *ddsta_htag; | |
1558 | } dsl_dataset_snapshot_tmp_arg_t; | |
1559 | ||
1560 | static int | |
1561 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1562 | { | |
1563 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1564 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1565 | dsl_dataset_t *ds; | |
1566 | int error; | |
1567 | ||
1568 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1569 | if (error != 0) | |
1570 | return (error); | |
1571 | ||
1572 | /* NULL cred means no limit check for tmp snapshot */ | |
1573 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, | |
1574 | tx, B_FALSE, 0, NULL); | |
1575 | if (error != 0) { | |
1576 | dsl_dataset_rele(ds, FTAG); | |
1577 | return (error); | |
1578 | } | |
1579 | ||
1580 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1581 | dsl_dataset_rele(ds, FTAG); | |
1582 | return (SET_ERROR(ENOTSUP)); | |
1583 | } | |
1584 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1585 | B_TRUE, tx); | |
1586 | if (error != 0) { | |
1587 | dsl_dataset_rele(ds, FTAG); | |
1588 | return (error); | |
1589 | } | |
1590 | ||
1591 | dsl_dataset_rele(ds, FTAG); | |
1592 | return (0); | |
1593 | } | |
1594 | ||
1595 | static void | |
1596 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1597 | { | |
1598 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1599 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
86e3c28a | 1600 | dsl_dataset_t *ds = NULL; |
70e083d2 TG |
1601 | |
1602 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1603 | ||
1604 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1605 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1606 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1607 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1608 | ||
1609 | dsl_dataset_rele(ds, FTAG); | |
1610 | } | |
1611 | ||
1612 | int | |
1613 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1614 | minor_t cleanup_minor, const char *htag) | |
1615 | { | |
1616 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1617 | int error; | |
1618 | spa_t *spa; | |
1619 | boolean_t needsuspend; | |
1620 | void *cookie; | |
1621 | ||
1622 | ddsta.ddsta_fsname = fsname; | |
1623 | ddsta.ddsta_snapname = snapname; | |
1624 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1625 | ddsta.ddsta_htag = htag; | |
1626 | ||
1627 | error = spa_open(fsname, &spa, FTAG); | |
1628 | if (error != 0) | |
1629 | return (error); | |
1630 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1631 | spa_close(spa, FTAG); | |
1632 | ||
1633 | if (needsuspend) { | |
1634 | error = zil_suspend(fsname, &cookie); | |
1635 | if (error != 0) | |
1636 | return (error); | |
1637 | } | |
1638 | ||
1639 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
1640 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); | |
1641 | ||
1642 | if (needsuspend) | |
1643 | zil_resume(cookie); | |
1644 | return (error); | |
1645 | } | |
1646 | ||
1647 | ||
1648 | void | |
1649 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1650 | { | |
86e3c28a CIK |
1651 | spa_feature_t f; |
1652 | ||
70e083d2 TG |
1653 | ASSERT(dmu_tx_is_syncing(tx)); |
1654 | ASSERT(ds->ds_objset != NULL); | |
1655 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); | |
1656 | ||
1657 | /* | |
1658 | * in case we had to change ds_fsid_guid when we opened it, | |
1659 | * sync it out now. | |
1660 | */ | |
1661 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1662 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; | |
1663 | ||
86e3c28a CIK |
1664 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
1665 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1666 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
1667 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
1668 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1669 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
1670 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
1671 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1672 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
1673 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
1674 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
1675 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
1676 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
1677 | } | |
1678 | ||
70e083d2 TG |
1679 | dmu_objset_sync(ds->ds_objset, zio, tx); |
1680 | ||
86e3c28a CIK |
1681 | for (f = 0; f < SPA_FEATURES; f++) { |
1682 | if (ds->ds_feature_activation_needed[f]) { | |
1683 | if (ds->ds_feature_inuse[f]) | |
1684 | continue; | |
1685 | dsl_dataset_activate_feature(ds->ds_object, f, tx); | |
1686 | ds->ds_feature_inuse[f] = B_TRUE; | |
1687 | } | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | static int | |
1692 | deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) | |
1693 | { | |
1694 | dsl_deadlist_t *dl = arg; | |
1695 | dsl_deadlist_insert(dl, bp, tx); | |
1696 | return (0); | |
1697 | } | |
1698 | ||
1699 | void | |
1700 | dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1701 | { | |
1702 | objset_t *os = ds->ds_objset; | |
1703 | ||
1704 | bplist_iterate(&ds->ds_pending_deadlist, | |
1705 | deadlist_enqueue_cb, &ds->ds_deadlist, tx); | |
1706 | ||
1707 | if (os->os_synced_dnodes != NULL) { | |
1708 | multilist_destroy(os->os_synced_dnodes); | |
1709 | os->os_synced_dnodes = NULL; | |
70e083d2 | 1710 | } |
86e3c28a CIK |
1711 | |
1712 | ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx))); | |
1713 | ||
1714 | dmu_buf_rele(ds->ds_dbuf, ds); | |
70e083d2 TG |
1715 | } |
1716 | ||
1717 | static void | |
1718 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1719 | { | |
1720 | uint64_t count = 0; | |
1721 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1722 | zap_cursor_t zc; | |
1723 | zap_attribute_t za; | |
1724 | nvlist_t *propval = fnvlist_alloc(); | |
86e3c28a | 1725 | nvlist_t *val; |
70e083d2 TG |
1726 | |
1727 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
1728 | ||
86e3c28a CIK |
1729 | /* |
1730 | * We use nvlist_alloc() instead of fnvlist_alloc() because the | |
1731 | * latter would allocate the list with NV_UNIQUE_NAME flag. | |
1732 | * As a result, every time a clone name is appended to the list | |
1733 | * it would be (linearly) searched for for a duplicate name. | |
1734 | * We already know that all clone names must be unique and we | |
1735 | * want avoid the quadratic complexity of double-checking that | |
1736 | * because we can have a large number of clones. | |
1737 | */ | |
1738 | VERIFY0(nvlist_alloc(&val, 0, KM_SLEEP)); | |
1739 | ||
70e083d2 TG |
1740 | /* |
1741 | * There may be missing entries in ds_next_clones_obj | |
1742 | * due to a bug in a previous version of the code. | |
1743 | * Only trust it if it has the right number of entries. | |
1744 | */ | |
1745 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { | |
1746 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1747 | &count)); | |
1748 | } | |
1749 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) | |
1750 | goto fail; | |
1751 | for (zap_cursor_init(&zc, mos, | |
1752 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
1753 | zap_cursor_retrieve(&zc, &za) == 0; | |
1754 | zap_cursor_advance(&zc)) { | |
1755 | dsl_dataset_t *clone; | |
86e3c28a | 1756 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
70e083d2 TG |
1757 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1758 | za.za_first_integer, FTAG, &clone)); | |
1759 | dsl_dir_name(clone->ds_dir, buf); | |
1760 | fnvlist_add_boolean(val, buf); | |
1761 | dsl_dataset_rele(clone, FTAG); | |
1762 | } | |
1763 | zap_cursor_fini(&zc); | |
1764 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); | |
1765 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
1766 | fail: | |
1767 | nvlist_free(val); | |
1768 | nvlist_free(propval); | |
1769 | } | |
1770 | ||
86e3c28a CIK |
1771 | static void |
1772 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1773 | { | |
1774 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1775 | ||
1776 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
1777 | char *str; | |
1778 | void *packed; | |
1779 | uint8_t *compressed; | |
1780 | uint64_t val; | |
1781 | nvlist_t *token_nv = fnvlist_alloc(); | |
1782 | size_t packed_size, compressed_size; | |
1783 | zio_cksum_t cksum; | |
1784 | char *propval; | |
1785 | char buf[MAXNAMELEN]; | |
1786 | int i; | |
1787 | ||
1788 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1789 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
1790 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
1791 | } | |
1792 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1793 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
1794 | fnvlist_add_uint64(token_nv, "object", val); | |
1795 | } | |
1796 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1797 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
1798 | fnvlist_add_uint64(token_nv, "offset", val); | |
1799 | } | |
1800 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1801 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
1802 | fnvlist_add_uint64(token_nv, "bytes", val); | |
1803 | } | |
1804 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1805 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
1806 | fnvlist_add_uint64(token_nv, "toguid", val); | |
1807 | } | |
1808 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1809 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
1810 | fnvlist_add_string(token_nv, "toname", buf); | |
1811 | } | |
1812 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, | |
1813 | DS_FIELD_RESUME_LARGEBLOCK) == 0) { | |
1814 | fnvlist_add_boolean(token_nv, "largeblockok"); | |
1815 | } | |
1816 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, | |
1817 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
1818 | fnvlist_add_boolean(token_nv, "embedok"); | |
1819 | } | |
1820 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, | |
1821 | DS_FIELD_RESUME_COMPRESSOK) == 0) { | |
1822 | fnvlist_add_boolean(token_nv, "compressok"); | |
1823 | } | |
1824 | packed = fnvlist_pack(token_nv, &packed_size); | |
1825 | fnvlist_free(token_nv); | |
1826 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
1827 | ||
1828 | compressed_size = gzip_compress(packed, compressed, | |
1829 | packed_size, packed_size, 6); | |
1830 | ||
1831 | fletcher_4_native_varsize(compressed, compressed_size, &cksum); | |
1832 | ||
1833 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1834 | for (i = 0; i < compressed_size; i++) { | |
1835 | (void) sprintf(str + i * 2, "%02x", compressed[i]); | |
1836 | } | |
1837 | str[compressed_size * 2] = '\0'; | |
1838 | propval = kmem_asprintf("%u-%llx-%llx-%s", | |
1839 | ZFS_SEND_RESUME_TOKEN_VERSION, | |
1840 | (longlong_t)cksum.zc_word[0], | |
1841 | (longlong_t)packed_size, str); | |
1842 | dsl_prop_nvlist_add_string(nv, | |
1843 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
1844 | kmem_free(packed, packed_size); | |
1845 | kmem_free(str, compressed_size * 2 + 1); | |
1846 | kmem_free(compressed, packed_size); | |
1847 | strfree(propval); | |
1848 | } | |
1849 | } | |
1850 | ||
70e083d2 TG |
1851 | void |
1852 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1853 | { | |
86e3c28a | 1854 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
70e083d2 | 1855 | uint64_t refd, avail, uobjs, aobjs, ratio; |
70e083d2 TG |
1856 | |
1857 | ASSERT(dsl_pool_config_held(dp)); | |
1858 | ||
1859 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : | |
1860 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1861 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
1862 | ||
1863 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
1864 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, | |
1865 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); | |
1866 | ||
1867 | if (ds->ds_is_snapshot) { | |
1868 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); | |
1869 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
1870 | dsl_dataset_phys(ds)->ds_unique_bytes); | |
1871 | get_clones_stat(ds, nv); | |
1872 | } else { | |
86e3c28a CIK |
1873 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { |
1874 | char buf[ZFS_MAX_DATASET_NAME_LEN]; | |
1875 | dsl_dataset_name(ds->ds_prev, buf); | |
1876 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); | |
1877 | } | |
1878 | ||
70e083d2 TG |
1879 | dsl_dir_stats(ds->ds_dir, nv); |
1880 | } | |
1881 | ||
1882 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1883 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1884 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1885 | ||
1886 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
1887 | dsl_dataset_phys(ds)->ds_creation_time); | |
1888 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
1889 | dsl_dataset_phys(ds)->ds_creation_txg); | |
1890 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, | |
1891 | ds->ds_quota); | |
1892 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1893 | ds->ds_reserved); | |
1894 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, | |
1895 | dsl_dataset_phys(ds)->ds_guid); | |
1896 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, | |
1897 | dsl_dataset_phys(ds)->ds_unique_bytes); | |
1898 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, | |
1899 | ds->ds_object); | |
1900 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1901 | ds->ds_userrefs); | |
1902 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, | |
1903 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
1904 | ||
1905 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { | |
1906 | uint64_t written, comp, uncomp; | |
1907 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1908 | dsl_dataset_t *prev; | |
1909 | int err; | |
1910 | ||
1911 | err = dsl_dataset_hold_obj(dp, | |
1912 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); | |
1913 | if (err == 0) { | |
1914 | err = dsl_dataset_space_written(prev, ds, &written, | |
1915 | &comp, &uncomp); | |
1916 | dsl_dataset_rele(prev, FTAG); | |
1917 | if (err == 0) { | |
1918 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1919 | written); | |
1920 | } | |
1921 | } | |
1922 | } | |
1923 | ||
86e3c28a CIK |
1924 | if (!dsl_dataset_is_snapshot(ds)) { |
1925 | /* 6 extra bytes for /%recv */ | |
1926 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
1927 | dsl_dataset_t *recv_ds; | |
1928 | ||
1929 | /* | |
1930 | * A failed "newfs" (e.g. full) resumable receive leaves | |
1931 | * the stats set on this dataset. Check here for the prop. | |
1932 | */ | |
1933 | get_receive_resume_stats(ds, nv); | |
1934 | ||
1935 | /* | |
1936 | * A failed incremental resumable receive leaves the | |
1937 | * stats set on our child named "%recv". Check the child | |
1938 | * for the prop. | |
1939 | */ | |
1940 | dsl_dataset_name(ds, recvname); | |
1941 | if (strlcat(recvname, "/", sizeof (recvname)) < | |
1942 | sizeof (recvname) && | |
1943 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
1944 | sizeof (recvname) && | |
1945 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
1946 | get_receive_resume_stats(recv_ds, nv); | |
1947 | dsl_dataset_rele(recv_ds, FTAG); | |
1948 | } | |
1949 | } | |
70e083d2 TG |
1950 | } |
1951 | ||
1952 | void | |
1953 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1954 | { | |
1955 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1956 | ASSERT(dsl_pool_config_held(dp)); | |
1957 | ||
1958 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; | |
1959 | stat->dds_inconsistent = | |
1960 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1961 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
1962 | stat->dds_origin[0] = '\0'; | |
1963 | if (ds->ds_is_snapshot) { | |
1964 | stat->dds_is_snapshot = B_TRUE; | |
1965 | stat->dds_num_clones = | |
1966 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
1967 | } else { | |
1968 | stat->dds_is_snapshot = B_FALSE; | |
1969 | stat->dds_num_clones = 0; | |
1970 | ||
1971 | if (dsl_dir_is_clone(ds->ds_dir)) { | |
1972 | dsl_dataset_t *ods; | |
1973 | ||
1974 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1975 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, | |
1976 | FTAG, &ods)); | |
1977 | dsl_dataset_name(ods, stat->dds_origin); | |
1978 | dsl_dataset_rele(ods, FTAG); | |
1979 | } | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | uint64_t | |
1984 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1985 | { | |
1986 | return (ds->ds_fsid_guid); | |
1987 | } | |
1988 | ||
1989 | void | |
1990 | dsl_dataset_space(dsl_dataset_t *ds, | |
1991 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
1992 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
1993 | { | |
1994 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1995 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
1996 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) | |
1997 | *availbytesp += | |
1998 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
1999 | if (ds->ds_quota != 0) { | |
2000 | /* | |
2001 | * Adjust available bytes according to refquota | |
2002 | */ | |
2003 | if (*refdbytesp < ds->ds_quota) | |
2004 | *availbytesp = MIN(*availbytesp, | |
2005 | ds->ds_quota - *refdbytesp); | |
2006 | else | |
2007 | *availbytesp = 0; | |
2008 | } | |
86e3c28a | 2009 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
70e083d2 | 2010 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
86e3c28a | 2011 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
70e083d2 TG |
2012 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
2013 | } | |
2014 | ||
2015 | boolean_t | |
2016 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) | |
2017 | { | |
86e3c28a CIK |
2018 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
2019 | uint64_t birth; | |
2020 | ||
2021 | ASSERT(dsl_pool_config_held(dp)); | |
70e083d2 TG |
2022 | if (snap == NULL) |
2023 | return (B_FALSE); | |
86e3c28a CIK |
2024 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
2025 | birth = dsl_dataset_get_blkptr(ds)->blk_birth; | |
2026 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
2027 | if (birth > dsl_dataset_phys(snap)->ds_creation_txg) { | |
70e083d2 TG |
2028 | objset_t *os, *os_snap; |
2029 | /* | |
2030 | * It may be that only the ZIL differs, because it was | |
2031 | * reset in the head. Don't count that as being | |
2032 | * modified. | |
2033 | */ | |
2034 | if (dmu_objset_from_ds(ds, &os) != 0) | |
2035 | return (B_TRUE); | |
2036 | if (dmu_objset_from_ds(snap, &os_snap) != 0) | |
2037 | return (B_TRUE); | |
2038 | return (bcmp(&os->os_phys->os_meta_dnode, | |
2039 | &os_snap->os_phys->os_meta_dnode, | |
2040 | sizeof (os->os_phys->os_meta_dnode)) != 0); | |
2041 | } | |
2042 | return (B_FALSE); | |
2043 | } | |
2044 | ||
2045 | typedef struct dsl_dataset_rename_snapshot_arg { | |
2046 | const char *ddrsa_fsname; | |
2047 | const char *ddrsa_oldsnapname; | |
2048 | const char *ddrsa_newsnapname; | |
2049 | boolean_t ddrsa_recursive; | |
2050 | dmu_tx_t *ddrsa_tx; | |
2051 | } dsl_dataset_rename_snapshot_arg_t; | |
2052 | ||
2053 | /* ARGSUSED */ | |
2054 | static int | |
2055 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, | |
2056 | dsl_dataset_t *hds, void *arg) | |
2057 | { | |
2058 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; | |
2059 | int error; | |
2060 | uint64_t val; | |
2061 | ||
2062 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); | |
2063 | if (error != 0) { | |
2064 | /* ignore nonexistent snapshots */ | |
2065 | return (error == ENOENT ? 0 : error); | |
2066 | } | |
2067 | ||
2068 | /* new name should not exist */ | |
2069 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2070 | if (error == 0) | |
2071 | error = SET_ERROR(EEXIST); | |
2072 | else if (error == ENOENT) | |
2073 | error = 0; | |
2074 | ||
2075 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
2076 | if (dsl_dir_namelen(hds->ds_dir) + 1 + | |
86e3c28a | 2077 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
70e083d2 TG |
2078 | error = SET_ERROR(ENAMETOOLONG); |
2079 | ||
2080 | return (error); | |
2081 | } | |
2082 | ||
2083 | static int | |
2084 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
2085 | { | |
2086 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; | |
2087 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2088 | dsl_dataset_t *hds; | |
2089 | int error; | |
2090 | ||
2091 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); | |
2092 | if (error != 0) | |
2093 | return (error); | |
2094 | ||
2095 | if (ddrsa->ddrsa_recursive) { | |
2096 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2097 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2098 | DS_FIND_CHILDREN); | |
2099 | } else { | |
2100 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2101 | } | |
2102 | dsl_dataset_rele(hds, FTAG); | |
2103 | return (error); | |
2104 | } | |
2105 | ||
2106 | static int | |
2107 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, | |
2108 | dsl_dataset_t *hds, void *arg) | |
2109 | { | |
2110 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; | |
2111 | dsl_dataset_t *ds; | |
2112 | uint64_t val; | |
2113 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2114 | int error; | |
2115 | ||
2116 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); | |
2117 | ASSERT(error == 0 || error == ENOENT); | |
2118 | if (error == ENOENT) { | |
2119 | /* ignore nonexistent snapshots */ | |
2120 | return (0); | |
2121 | } | |
2122 | ||
2123 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); | |
2124 | ||
2125 | /* log before we change the name */ | |
2126 | spa_history_log_internal_ds(ds, "rename", tx, | |
2127 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
2128 | ||
2129 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, | |
2130 | B_FALSE)); | |
2131 | mutex_enter(&ds->ds_lock); | |
86e3c28a CIK |
2132 | (void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname, |
2133 | sizeof (ds->ds_snapname)); | |
70e083d2 TG |
2134 | mutex_exit(&ds->ds_lock); |
2135 | VERIFY0(zap_add(dp->dp_meta_objset, | |
2136 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
2137 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); | |
2138 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, | |
2139 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
2140 | ||
2141 | dsl_dataset_rele(ds, FTAG); | |
2142 | return (0); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
2147 | { | |
2148 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; | |
2149 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
86e3c28a | 2150 | dsl_dataset_t *hds = NULL; |
70e083d2 TG |
2151 | |
2152 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); | |
2153 | ddrsa->ddrsa_tx = tx; | |
2154 | if (ddrsa->ddrsa_recursive) { | |
2155 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2156 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
2157 | DS_FIND_CHILDREN)); | |
2158 | } else { | |
2159 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
2160 | } | |
2161 | dsl_dataset_rele(hds, FTAG); | |
2162 | } | |
2163 | ||
2164 | int | |
2165 | dsl_dataset_rename_snapshot(const char *fsname, | |
2166 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
2167 | { | |
2168 | dsl_dataset_rename_snapshot_arg_t ddrsa; | |
2169 | ||
2170 | ddrsa.ddrsa_fsname = fsname; | |
2171 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
2172 | ddrsa.ddrsa_newsnapname = newsnapname; | |
2173 | ddrsa.ddrsa_recursive = recursive; | |
2174 | ||
2175 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, | |
2176 | dsl_dataset_rename_snapshot_sync, &ddrsa, | |
2177 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
2178 | } | |
2179 | ||
2180 | /* | |
2181 | * If we're doing an ownership handoff, we need to make sure that there is | |
2182 | * only one long hold on the dataset. We're not allowed to change anything here | |
2183 | * so we don't permanently release the long hold or regular hold here. We want | |
2184 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
2185 | * when we release the long hold. | |
2186 | */ | |
2187 | static int | |
2188 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
2189 | { | |
2190 | boolean_t held; | |
2191 | ||
2192 | if (!dmu_tx_is_syncing(tx)) | |
2193 | return (0); | |
2194 | ||
2195 | if (owner != NULL) { | |
2196 | VERIFY3P(ds->ds_owner, ==, owner); | |
2197 | dsl_dataset_long_rele(ds, owner); | |
2198 | } | |
2199 | ||
2200 | held = dsl_dataset_long_held(ds); | |
2201 | ||
2202 | if (owner != NULL) | |
2203 | dsl_dataset_long_hold(ds, owner); | |
2204 | ||
2205 | if (held) | |
2206 | return (SET_ERROR(EBUSY)); | |
2207 | ||
2208 | return (0); | |
2209 | } | |
2210 | ||
2211 | typedef struct dsl_dataset_rollback_arg { | |
2212 | const char *ddra_fsname; | |
86e3c28a | 2213 | const char *ddra_tosnap; |
70e083d2 TG |
2214 | void *ddra_owner; |
2215 | nvlist_t *ddra_result; | |
2216 | } dsl_dataset_rollback_arg_t; | |
2217 | ||
2218 | static int | |
2219 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
2220 | { | |
2221 | dsl_dataset_rollback_arg_t *ddra = arg; | |
2222 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2223 | dsl_dataset_t *ds; | |
2224 | int64_t unused_refres_delta; | |
2225 | int error; | |
2226 | nvpair_t *pair; | |
2227 | nvlist_t *proprequest, *bookmarks; | |
2228 | ||
2229 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); | |
2230 | if (error != 0) | |
2231 | return (error); | |
2232 | ||
2233 | /* must not be a snapshot */ | |
2234 | if (ds->ds_is_snapshot) { | |
2235 | dsl_dataset_rele(ds, FTAG); | |
2236 | return (SET_ERROR(EINVAL)); | |
2237 | } | |
2238 | ||
2239 | /* must have a most recent snapshot */ | |
2240 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { | |
2241 | dsl_dataset_rele(ds, FTAG); | |
2242 | return (SET_ERROR(EINVAL)); | |
2243 | } | |
2244 | ||
86e3c28a CIK |
2245 | /* |
2246 | * No rollback to a snapshot created in the current txg, because | |
2247 | * the rollback may dirty the dataset and create blocks that are | |
2248 | * not reachable from the rootbp while having a birth txg that | |
2249 | * falls into the snapshot's range. | |
2250 | */ | |
2251 | if (dmu_tx_is_syncing(tx) && | |
2252 | dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) { | |
2253 | dsl_dataset_rele(ds, FTAG); | |
2254 | return (SET_ERROR(EAGAIN)); | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * If the expected target snapshot is specified, then check that | |
2259 | * the latest snapshot is it. | |
2260 | */ | |
2261 | if (ddra->ddra_tosnap != NULL) { | |
2262 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; | |
2263 | ||
2264 | dsl_dataset_name(ds->ds_prev, namebuf); | |
2265 | if (strcmp(namebuf, ddra->ddra_tosnap) != 0) | |
2266 | return (SET_ERROR(EXDEV)); | |
2267 | } | |
2268 | ||
70e083d2 TG |
2269 | /* must not have any bookmarks after the most recent snapshot */ |
2270 | proprequest = fnvlist_alloc(); | |
2271 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2272 | bookmarks = fnvlist_alloc(); | |
2273 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); | |
2274 | fnvlist_free(proprequest); | |
2275 | if (error != 0) | |
2276 | return (error); | |
2277 | for (pair = nvlist_next_nvpair(bookmarks, NULL); | |
2278 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { | |
2279 | nvlist_t *valuenv = | |
2280 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2281 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2282 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
2283 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { | |
2284 | fnvlist_free(bookmarks); | |
2285 | dsl_dataset_rele(ds, FTAG); | |
2286 | return (SET_ERROR(EEXIST)); | |
2287 | } | |
2288 | } | |
2289 | fnvlist_free(bookmarks); | |
2290 | ||
2291 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); | |
2292 | if (error != 0) { | |
2293 | dsl_dataset_rele(ds, FTAG); | |
2294 | return (error); | |
2295 | } | |
2296 | ||
2297 | /* | |
2298 | * Check if the snap we are rolling back to uses more than | |
2299 | * the refquota. | |
2300 | */ | |
2301 | if (ds->ds_quota != 0 && | |
2302 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { | |
2303 | dsl_dataset_rele(ds, FTAG); | |
2304 | return (SET_ERROR(EDQUOT)); | |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | * When we do the clone swap, we will temporarily use more space | |
2309 | * due to the refreservation (the head will no longer have any | |
2310 | * unique space, so the entire amount of the refreservation will need | |
2311 | * to be free). We will immediately destroy the clone, freeing | |
2312 | * this space, but the freeing happens over many txg's. | |
2313 | */ | |
2314 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
2315 | dsl_dataset_phys(ds)->ds_unique_bytes); | |
2316 | ||
2317 | if (unused_refres_delta > 0 && | |
2318 | unused_refres_delta > | |
2319 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2320 | dsl_dataset_rele(ds, FTAG); | |
2321 | return (SET_ERROR(ENOSPC)); | |
2322 | } | |
2323 | ||
2324 | dsl_dataset_rele(ds, FTAG); | |
2325 | return (0); | |
2326 | } | |
2327 | ||
2328 | static void | |
2329 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2330 | { | |
2331 | dsl_dataset_rollback_arg_t *ddra = arg; | |
2332 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2333 | dsl_dataset_t *ds, *clone; | |
2334 | uint64_t cloneobj; | |
86e3c28a | 2335 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
70e083d2 TG |
2336 | |
2337 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); | |
2338 | ||
2339 | dsl_dataset_name(ds->ds_prev, namebuf); | |
2340 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2341 | ||
2342 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", | |
2343 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); | |
2344 | ||
2345 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2346 | ||
2347 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2348 | dsl_dataset_zero_zil(ds, tx); | |
2349 | ||
2350 | dsl_destroy_head_sync_impl(clone, tx); | |
2351 | ||
2352 | dsl_dataset_rele(clone, FTAG); | |
2353 | dsl_dataset_rele(ds, FTAG); | |
2354 | } | |
2355 | ||
2356 | /* | |
2357 | * Rolls back the given filesystem or volume to the most recent snapshot. | |
2358 | * The name of the most recent snapshot will be returned under key "target" | |
2359 | * in the result nvlist. | |
2360 | * | |
2361 | * If owner != NULL: | |
2362 | * - The existing dataset MUST be owned by the specified owner at entry | |
2363 | * - Upon return, dataset will still be held by the same owner, whether we | |
2364 | * succeed or not. | |
2365 | * | |
2366 | * This mode is required any time the existing filesystem is mounted. See | |
2367 | * notes above zfs_suspend_fs() for further details. | |
2368 | */ | |
2369 | int | |
86e3c28a CIK |
2370 | dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, |
2371 | nvlist_t *result) | |
70e083d2 TG |
2372 | { |
2373 | dsl_dataset_rollback_arg_t ddra; | |
2374 | ||
2375 | ddra.ddra_fsname = fsname; | |
86e3c28a | 2376 | ddra.ddra_tosnap = tosnap; |
70e083d2 TG |
2377 | ddra.ddra_owner = owner; |
2378 | ddra.ddra_result = result; | |
2379 | ||
2380 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, | |
2381 | dsl_dataset_rollback_sync, &ddra, | |
2382 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
2383 | } | |
2384 | ||
2385 | struct promotenode { | |
2386 | list_node_t link; | |
2387 | dsl_dataset_t *ds; | |
2388 | }; | |
2389 | ||
2390 | typedef struct dsl_dataset_promote_arg { | |
2391 | const char *ddpa_clonename; | |
2392 | dsl_dataset_t *ddpa_clone; | |
2393 | list_t shared_snaps, origin_snaps, clone_snaps; | |
2394 | dsl_dataset_t *origin_origin; /* origin of the origin */ | |
2395 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; | |
2396 | char *err_ds; | |
2397 | cred_t *cr; | |
2398 | } dsl_dataset_promote_arg_t; | |
2399 | ||
2400 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); | |
2401 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, | |
2402 | void *tag); | |
2403 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
2404 | ||
2405 | static int | |
2406 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) | |
2407 | { | |
2408 | dsl_dataset_promote_arg_t *ddpa = arg; | |
2409 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2410 | dsl_dataset_t *hds; | |
2411 | struct promotenode *snap; | |
2412 | dsl_dataset_t *origin_ds; | |
2413 | int err; | |
2414 | uint64_t unused; | |
2415 | uint64_t ss_mv_cnt; | |
2416 | size_t max_snap_len; | |
2417 | ||
2418 | err = promote_hold(ddpa, dp, FTAG); | |
2419 | if (err != 0) | |
2420 | return (err); | |
2421 | ||
2422 | hds = ddpa->ddpa_clone; | |
2423 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; | |
2424 | ||
2425 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { | |
2426 | promote_rele(ddpa, FTAG); | |
2427 | return (SET_ERROR(EXDEV)); | |
2428 | } | |
2429 | ||
2430 | /* | |
2431 | * Compute and check the amount of space to transfer. Since this is | |
2432 | * so expensive, don't do the preliminary check. | |
2433 | */ | |
2434 | if (!dmu_tx_is_syncing(tx)) { | |
2435 | promote_rele(ddpa, FTAG); | |
2436 | return (0); | |
2437 | } | |
2438 | ||
2439 | snap = list_head(&ddpa->shared_snaps); | |
86e3c28a CIK |
2440 | if (snap == NULL) { |
2441 | err = SET_ERROR(ENOENT); | |
2442 | goto out; | |
2443 | } | |
70e083d2 TG |
2444 | origin_ds = snap->ds; |
2445 | ||
2446 | /* compute origin's new unique space */ | |
2447 | snap = list_tail(&ddpa->clone_snaps); | |
2448 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, | |
2449 | origin_ds->ds_object); | |
2450 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2451 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, | |
2452 | &ddpa->unique, &unused, &unused); | |
2453 | ||
2454 | /* | |
2455 | * Walk the snapshots that we are moving | |
2456 | * | |
2457 | * Compute space to transfer. Consider the incremental changes | |
2458 | * to used by each snapshot: | |
2459 | * (my used) = (prev's used) + (blocks born) - (blocks killed) | |
2460 | * So each snapshot gave birth to: | |
2461 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2462 | * So a sequence would look like: | |
2463 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2464 | * Which simplifies to: | |
2465 | * uN + kN + kN-1 + ... + k1 + k0 | |
2466 | * Note however, if we stop before we reach the ORIGIN we get: | |
2467 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2468 | */ | |
2469 | ss_mv_cnt = 0; | |
2470 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; | |
2471 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2472 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
2473 | for (snap = list_head(&ddpa->shared_snaps); snap; | |
2474 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
2475 | uint64_t val, dlused, dlcomp, dluncomp; | |
2476 | dsl_dataset_t *ds = snap->ds; | |
2477 | ||
2478 | ss_mv_cnt++; | |
2479 | ||
2480 | /* | |
2481 | * If there are long holds, we won't be able to evict | |
2482 | * the objset. | |
2483 | */ | |
2484 | if (dsl_dataset_long_held(ds)) { | |
2485 | err = SET_ERROR(EBUSY); | |
2486 | goto out; | |
2487 | } | |
2488 | ||
2489 | /* Check that the snapshot name does not conflict */ | |
2490 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
2491 | if (strlen(ds->ds_snapname) >= max_snap_len) { | |
2492 | err = SET_ERROR(ENAMETOOLONG); | |
2493 | goto out; | |
2494 | } | |
2495 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); | |
2496 | if (err == 0) { | |
2497 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); | |
2498 | err = SET_ERROR(EEXIST); | |
2499 | goto out; | |
2500 | } | |
2501 | if (err != ENOENT) | |
2502 | goto out; | |
2503 | ||
2504 | /* The very first snapshot does not have a deadlist */ | |
2505 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) | |
2506 | continue; | |
2507 | ||
2508 | dsl_deadlist_space(&ds->ds_deadlist, | |
2509 | &dlused, &dlcomp, &dluncomp); | |
2510 | ddpa->used += dlused; | |
2511 | ddpa->comp += dlcomp; | |
2512 | ddpa->uncomp += dluncomp; | |
2513 | } | |
2514 | ||
2515 | /* | |
2516 | * If we are a clone of a clone then we never reached ORIGIN, | |
2517 | * so we need to subtract out the clone origin's used space. | |
2518 | */ | |
2519 | if (ddpa->origin_origin) { | |
2520 | ddpa->used -= | |
2521 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2522 | ddpa->comp -= | |
2523 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
2524 | ddpa->uncomp -= | |
2525 | dsl_dataset_phys(ddpa->origin_origin)-> | |
2526 | ds_uncompressed_bytes; | |
2527 | } | |
2528 | ||
2529 | /* Check that there is enough space and limit headroom here */ | |
2530 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, | |
2531 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); | |
2532 | if (err != 0) | |
2533 | goto out; | |
2534 | ||
2535 | /* | |
2536 | * Compute the amounts of space that will be used by snapshots | |
2537 | * after the promotion (for both origin and clone). For each, | |
2538 | * it is the amount of space that will be on all of their | |
2539 | * deadlists (that was not born before their new origin). | |
2540 | */ | |
2541 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { | |
2542 | uint64_t space; | |
2543 | ||
2544 | /* | |
2545 | * Note, typically this will not be a clone of a clone, | |
2546 | * so dd_origin_txg will be < TXG_INITIAL, so | |
2547 | * these snaplist_space() -> dsl_deadlist_space_range() | |
2548 | * calls will be fast because they do not have to | |
2549 | * iterate over all bps. | |
2550 | */ | |
2551 | snap = list_head(&ddpa->origin_snaps); | |
86e3c28a CIK |
2552 | if (snap == NULL) { |
2553 | err = SET_ERROR(ENOENT); | |
2554 | goto out; | |
2555 | } | |
70e083d2 TG |
2556 | err = snaplist_space(&ddpa->shared_snaps, |
2557 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2558 | if (err != 0) | |
2559 | goto out; | |
2560 | ||
2561 | err = snaplist_space(&ddpa->clone_snaps, | |
2562 | snap->ds->ds_dir->dd_origin_txg, &space); | |
2563 | if (err != 0) | |
2564 | goto out; | |
2565 | ddpa->cloneusedsnap += space; | |
2566 | } | |
2567 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & | |
2568 | DD_FLAG_USED_BREAKDOWN) { | |
2569 | err = snaplist_space(&ddpa->origin_snaps, | |
2570 | dsl_dataset_phys(origin_ds)->ds_creation_txg, | |
2571 | &ddpa->originusedsnap); | |
2572 | if (err != 0) | |
2573 | goto out; | |
2574 | } | |
2575 | ||
2576 | out: | |
2577 | promote_rele(ddpa, FTAG); | |
2578 | return (err); | |
2579 | } | |
2580 | ||
2581 | static void | |
2582 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) | |
2583 | { | |
2584 | dsl_dataset_promote_arg_t *ddpa = arg; | |
2585 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2586 | dsl_dataset_t *hds; | |
2587 | struct promotenode *snap; | |
2588 | dsl_dataset_t *origin_ds; | |
2589 | dsl_dataset_t *origin_head; | |
2590 | dsl_dir_t *dd; | |
2591 | dsl_dir_t *odd = NULL; | |
2592 | uint64_t oldnext_obj; | |
2593 | int64_t delta; | |
2594 | ||
2595 | VERIFY0(promote_hold(ddpa, dp, FTAG)); | |
2596 | hds = ddpa->ddpa_clone; | |
2597 | ||
2598 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); | |
2599 | ||
2600 | snap = list_head(&ddpa->shared_snaps); | |
2601 | origin_ds = snap->ds; | |
2602 | dd = hds->ds_dir; | |
2603 | ||
2604 | snap = list_head(&ddpa->origin_snaps); | |
2605 | origin_head = snap->ds; | |
2606 | ||
2607 | /* | |
2608 | * We need to explicitly open odd, since origin_ds's dd will be | |
2609 | * changing. | |
2610 | */ | |
2611 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, | |
2612 | NULL, FTAG, &odd)); | |
2613 | ||
2614 | /* change origin's next snap */ | |
2615 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
2616 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; | |
2617 | snap = list_tail(&ddpa->clone_snaps); | |
2618 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, | |
2619 | origin_ds->ds_object); | |
2620 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
2621 | ||
2622 | /* change the origin's next clone */ | |
2623 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { | |
2624 | dsl_dataset_remove_from_next_clones(origin_ds, | |
2625 | snap->ds->ds_object, tx); | |
2626 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
2627 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, | |
2628 | oldnext_obj, tx)); | |
2629 | } | |
2630 | ||
2631 | /* change origin */ | |
2632 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
2633 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); | |
2634 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
2635 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; | |
2636 | dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
2637 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; | |
2638 | origin_head->ds_dir->dd_origin_txg = | |
2639 | dsl_dataset_phys(origin_ds)->ds_creation_txg; | |
2640 | ||
2641 | /* change dd_clone entries */ | |
2642 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
2643 | VERIFY0(zap_remove_int(dp->dp_meta_objset, | |
2644 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); | |
2645 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
2646 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, | |
2647 | hds->ds_object, tx)); | |
2648 | ||
2649 | VERIFY0(zap_remove_int(dp->dp_meta_objset, | |
2650 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, | |
2651 | origin_head->ds_object, tx)); | |
2652 | if (dsl_dir_phys(dd)->dd_clones == 0) { | |
2653 | dsl_dir_phys(dd)->dd_clones = | |
2654 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2655 | DMU_OT_NONE, 0, tx); | |
2656 | } | |
2657 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
2658 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); | |
2659 | } | |
2660 | ||
2661 | /* move snapshots to this dir */ | |
2662 | for (snap = list_head(&ddpa->shared_snaps); snap; | |
2663 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
2664 | dsl_dataset_t *ds = snap->ds; | |
2665 | ||
2666 | /* | |
2667 | * Property callbacks are registered to a particular | |
2668 | * dsl_dir. Since ours is changing, evict the objset | |
2669 | * so that they will be unregistered from the old dsl_dir. | |
2670 | */ | |
2671 | if (ds->ds_objset) { | |
2672 | dmu_objset_evict(ds->ds_objset); | |
2673 | ds->ds_objset = NULL; | |
2674 | } | |
2675 | ||
2676 | /* move snap name entry */ | |
2677 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
2678 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
2679 | ds->ds_snapname, tx, B_TRUE)); | |
2680 | VERIFY0(zap_add(dp->dp_meta_objset, | |
2681 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, | |
2682 | 8, 1, &ds->ds_object, tx)); | |
2683 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, | |
2684 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
2685 | ||
2686 | /* change containing dsl_dir */ | |
2687 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
2688 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); | |
2689 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
2690 | ASSERT3P(ds->ds_dir, ==, odd); | |
2691 | dsl_dir_rele(ds->ds_dir, ds); | |
2692 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
2693 | NULL, ds, &ds->ds_dir)); | |
2694 | ||
2695 | /* move any clone references */ | |
2696 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && | |
2697 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
2698 | zap_cursor_t zc; | |
2699 | zap_attribute_t za; | |
2700 | ||
2701 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
2702 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
2703 | zap_cursor_retrieve(&zc, &za) == 0; | |
2704 | zap_cursor_advance(&zc)) { | |
2705 | dsl_dataset_t *cnds; | |
2706 | uint64_t o; | |
2707 | ||
2708 | if (za.za_first_integer == oldnext_obj) { | |
2709 | /* | |
2710 | * We've already moved the | |
2711 | * origin's reference. | |
2712 | */ | |
2713 | continue; | |
2714 | } | |
2715 | ||
2716 | VERIFY0(dsl_dataset_hold_obj(dp, | |
2717 | za.za_first_integer, FTAG, &cnds)); | |
2718 | o = dsl_dir_phys(cnds->ds_dir)-> | |
2719 | dd_head_dataset_obj; | |
2720 | ||
2721 | VERIFY0(zap_remove_int(dp->dp_meta_objset, | |
2722 | dsl_dir_phys(odd)->dd_clones, o, tx)); | |
2723 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
2724 | dsl_dir_phys(dd)->dd_clones, o, tx)); | |
2725 | dsl_dataset_rele(cnds, FTAG); | |
2726 | } | |
2727 | zap_cursor_fini(&zc); | |
2728 | } | |
2729 | ||
2730 | ASSERT(!dsl_prop_hascb(ds)); | |
2731 | } | |
2732 | ||
2733 | /* | |
2734 | * Change space accounting. | |
2735 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2736 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2737 | * is true for each of {clone,origin} independently. | |
2738 | */ | |
2739 | ||
2740 | delta = ddpa->cloneusedsnap - | |
2741 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; | |
2742 | ASSERT3S(delta, >=, 0); | |
2743 | ASSERT3U(ddpa->used, >=, delta); | |
2744 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2745 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2746 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
2747 | ||
2748 | delta = ddpa->originusedsnap - | |
2749 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; | |
2750 | ASSERT3S(delta, <=, 0); | |
2751 | ASSERT3U(ddpa->used, >=, -delta); | |
2752 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2753 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2754 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2755 | ||
2756 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; | |
2757 | ||
2758 | /* log history record */ | |
2759 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2760 | ||
2761 | dsl_dir_rele(odd, FTAG); | |
2762 | promote_rele(ddpa, FTAG); | |
2763 | } | |
2764 | ||
2765 | /* | |
2766 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2767 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2768 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2769 | * snapshots back to this dataset's origin. | |
2770 | */ | |
2771 | static int | |
2772 | snaplist_make(dsl_pool_t *dp, | |
2773 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
2774 | { | |
2775 | uint64_t obj = last_obj; | |
2776 | ||
2777 | list_create(l, sizeof (struct promotenode), | |
2778 | offsetof(struct promotenode, link)); | |
2779 | ||
2780 | while (obj != first_obj) { | |
2781 | dsl_dataset_t *ds; | |
2782 | struct promotenode *snap; | |
2783 | int err; | |
2784 | ||
2785 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); | |
2786 | ASSERT(err != ENOENT); | |
2787 | if (err != 0) | |
2788 | return (err); | |
2789 | ||
2790 | if (first_obj == 0) | |
2791 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; | |
2792 | ||
2793 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); | |
2794 | snap->ds = ds; | |
2795 | list_insert_tail(l, snap); | |
2796 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; | |
2797 | } | |
2798 | ||
2799 | return (0); | |
2800 | } | |
2801 | ||
2802 | static int | |
2803 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
2804 | { | |
2805 | struct promotenode *snap; | |
2806 | ||
2807 | *spacep = 0; | |
2808 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2809 | uint64_t used, comp, uncomp; | |
2810 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2811 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2812 | *spacep += used; | |
2813 | } | |
2814 | return (0); | |
2815 | } | |
2816 | ||
2817 | static void | |
2818 | snaplist_destroy(list_t *l, void *tag) | |
2819 | { | |
2820 | struct promotenode *snap; | |
2821 | ||
2822 | if (l == NULL || !list_link_active(&l->list_head)) | |
2823 | return; | |
2824 | ||
2825 | while ((snap = list_tail(l)) != NULL) { | |
2826 | list_remove(l, snap); | |
2827 | dsl_dataset_rele(snap->ds, tag); | |
2828 | kmem_free(snap, sizeof (*snap)); | |
2829 | } | |
2830 | list_destroy(l); | |
2831 | } | |
2832 | ||
2833 | static int | |
2834 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) | |
2835 | { | |
2836 | int error; | |
2837 | dsl_dir_t *dd; | |
2838 | struct promotenode *snap; | |
2839 | ||
2840 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, | |
2841 | &ddpa->ddpa_clone); | |
2842 | if (error != 0) | |
2843 | return (error); | |
2844 | dd = ddpa->ddpa_clone->ds_dir; | |
2845 | ||
2846 | if (ddpa->ddpa_clone->ds_is_snapshot || | |
2847 | !dsl_dir_is_clone(dd)) { | |
2848 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2849 | return (SET_ERROR(EINVAL)); | |
2850 | } | |
2851 | ||
2852 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, | |
2853 | &ddpa->shared_snaps, tag); | |
2854 | if (error != 0) | |
2855 | goto out; | |
2856 | ||
2857 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, | |
2858 | &ddpa->clone_snaps, tag); | |
2859 | if (error != 0) | |
2860 | goto out; | |
2861 | ||
2862 | snap = list_head(&ddpa->shared_snaps); | |
2863 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); | |
2864 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2865 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
2866 | &ddpa->origin_snaps, tag); | |
2867 | if (error != 0) | |
2868 | goto out; | |
2869 | ||
2870 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { | |
2871 | error = dsl_dataset_hold_obj(dp, | |
2872 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, | |
2873 | tag, &ddpa->origin_origin); | |
2874 | if (error != 0) | |
2875 | goto out; | |
2876 | } | |
2877 | out: | |
2878 | if (error != 0) | |
2879 | promote_rele(ddpa, tag); | |
2880 | return (error); | |
2881 | } | |
2882 | ||
2883 | static void | |
2884 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) | |
2885 | { | |
2886 | snaplist_destroy(&ddpa->shared_snaps, tag); | |
2887 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2888 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2889 | if (ddpa->origin_origin != NULL) | |
2890 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2891 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2892 | } | |
2893 | ||
2894 | /* | |
2895 | * Promote a clone. | |
2896 | * | |
2897 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
86e3c28a | 2898 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
70e083d2 TG |
2899 | */ |
2900 | int | |
2901 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2902 | { | |
2903 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2904 | uint64_t numsnaps; | |
2905 | int error; | |
2906 | objset_t *os; | |
2907 | ||
2908 | /* | |
2909 | * We will modify space proportional to the number of | |
2910 | * snapshots. Compute numsnaps. | |
2911 | */ | |
2912 | error = dmu_objset_hold(name, FTAG, &os); | |
2913 | if (error != 0) | |
2914 | return (error); | |
2915 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
2916 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, | |
2917 | &numsnaps); | |
2918 | dmu_objset_rele(os, FTAG); | |
2919 | if (error != 0) | |
2920 | return (error); | |
2921 | ||
2922 | ddpa.ddpa_clonename = name; | |
2923 | ddpa.err_ds = conflsnap; | |
2924 | ddpa.cr = CRED(); | |
2925 | ||
2926 | return (dsl_sync_task(name, dsl_dataset_promote_check, | |
2927 | dsl_dataset_promote_sync, &ddpa, | |
2928 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
2929 | } | |
2930 | ||
2931 | int | |
2932 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, | |
2933 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) | |
2934 | { | |
86e3c28a CIK |
2935 | /* |
2936 | * "slack" factor for received datasets with refquota set on them. | |
2937 | * See the bottom of this function for details on its use. | |
2938 | */ | |
2939 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * | |
2940 | spa_asize_inflation; | |
70e083d2 TG |
2941 | int64_t unused_refres_delta; |
2942 | ||
2943 | /* they should both be heads */ | |
2944 | if (clone->ds_is_snapshot || | |
2945 | origin_head->ds_is_snapshot) | |
2946 | return (SET_ERROR(EINVAL)); | |
2947 | ||
2948 | /* if we are not forcing, the branch point should be just before them */ | |
2949 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2950 | return (SET_ERROR(EINVAL)); | |
2951 | ||
2952 | /* clone should be the clone (unless they are unrelated) */ | |
2953 | if (clone->ds_prev != NULL && | |
2954 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
2955 | origin_head->ds_dir != clone->ds_prev->ds_dir) | |
2956 | return (SET_ERROR(EINVAL)); | |
2957 | ||
2958 | /* the clone should be a child of the origin */ | |
2959 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2960 | return (SET_ERROR(EINVAL)); | |
2961 | ||
2962 | /* origin_head shouldn't be modified unless 'force' */ | |
2963 | if (!force && | |
2964 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2965 | return (SET_ERROR(ETXTBSY)); | |
2966 | ||
2967 | /* origin_head should have no long holds (e.g. is not mounted) */ | |
2968 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) | |
2969 | return (SET_ERROR(EBUSY)); | |
2970 | ||
2971 | /* check amount of any unconsumed refreservation */ | |
2972 | unused_refres_delta = | |
2973 | (int64_t)MIN(origin_head->ds_reserved, | |
2974 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - | |
2975 | (int64_t)MIN(origin_head->ds_reserved, | |
2976 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
2977 | ||
2978 | if (unused_refres_delta > 0 && | |
2979 | unused_refres_delta > | |
2980 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2981 | return (SET_ERROR(ENOSPC)); | |
2982 | ||
86e3c28a CIK |
2983 | /* |
2984 | * The clone can't be too much over the head's refquota. | |
2985 | * | |
2986 | * To ensure that the entire refquota can be used, we allow one | |
2987 | * transaction to exceed the the refquota. Therefore, this check | |
2988 | * needs to also allow for the space referenced to be more than the | |
2989 | * refquota. The maximum amount of space that one transaction can use | |
2990 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
2991 | * overage ensures that we are able to receive a filesystem that | |
2992 | * exceeds the refquota on the source system. | |
2993 | * | |
2994 | * So that overage is the refquota_slack we use below. | |
2995 | */ | |
70e083d2 TG |
2996 | if (origin_head->ds_quota != 0 && |
2997 | dsl_dataset_phys(clone)->ds_referenced_bytes > | |
86e3c28a | 2998 | origin_head->ds_quota + refquota_slack) |
70e083d2 TG |
2999 | return (SET_ERROR(EDQUOT)); |
3000 | ||
3001 | return (0); | |
3002 | } | |
3003 | ||
3004 | void | |
3005 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, | |
3006 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
3007 | { | |
3008 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3009 | int64_t unused_refres_delta; | |
86e3c28a | 3010 | blkptr_t tmp; |
70e083d2 TG |
3011 | |
3012 | ASSERT(clone->ds_reserved == 0); | |
86e3c28a CIK |
3013 | /* |
3014 | * NOTE: On DEBUG kernels there could be a race between this and | |
3015 | * the check function if spa_asize_inflation is adjusted... | |
3016 | */ | |
70e083d2 | 3017 | ASSERT(origin_head->ds_quota == 0 || |
86e3c28a CIK |
3018 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
3019 | DMU_MAX_ACCESS * spa_asize_inflation); | |
70e083d2 TG |
3020 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
3021 | ||
86e3c28a CIK |
3022 | /* |
3023 | * Swap per-dataset feature flags. | |
3024 | */ | |
3025 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { | |
3026 | boolean_t clone_inuse; | |
3027 | boolean_t origin_head_inuse; | |
3028 | ||
3029 | if (!(spa_feature_table[f].fi_flags & | |
3030 | ZFEATURE_FLAG_PER_DATASET)) { | |
3031 | ASSERT(!clone->ds_feature_inuse[f]); | |
3032 | ASSERT(!origin_head->ds_feature_inuse[f]); | |
3033 | continue; | |
3034 | } | |
3035 | ||
3036 | clone_inuse = clone->ds_feature_inuse[f]; | |
3037 | origin_head_inuse = origin_head->ds_feature_inuse[f]; | |
3038 | ||
3039 | if (clone_inuse) { | |
3040 | dsl_dataset_deactivate_feature(clone->ds_object, f, tx); | |
3041 | clone->ds_feature_inuse[f] = B_FALSE; | |
3042 | } | |
3043 | if (origin_head_inuse) { | |
3044 | dsl_dataset_deactivate_feature(origin_head->ds_object, | |
3045 | f, tx); | |
3046 | origin_head->ds_feature_inuse[f] = B_FALSE; | |
3047 | } | |
3048 | if (clone_inuse) { | |
3049 | dsl_dataset_activate_feature(origin_head->ds_object, | |
3050 | f, tx); | |
3051 | origin_head->ds_feature_inuse[f] = B_TRUE; | |
3052 | } | |
3053 | if (origin_head_inuse) { | |
3054 | dsl_dataset_activate_feature(clone->ds_object, f, tx); | |
3055 | clone->ds_feature_inuse[f] = B_TRUE; | |
3056 | } | |
3057 | } | |
3058 | ||
70e083d2 TG |
3059 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
3060 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
3061 | ||
3062 | if (clone->ds_objset != NULL) { | |
3063 | dmu_objset_evict(clone->ds_objset); | |
3064 | clone->ds_objset = NULL; | |
3065 | } | |
3066 | ||
3067 | if (origin_head->ds_objset != NULL) { | |
3068 | dmu_objset_evict(origin_head->ds_objset); | |
3069 | origin_head->ds_objset = NULL; | |
3070 | } | |
3071 | ||
3072 | unused_refres_delta = | |
3073 | (int64_t)MIN(origin_head->ds_reserved, | |
3074 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - | |
3075 | (int64_t)MIN(origin_head->ds_reserved, | |
3076 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
3077 | ||
3078 | /* | |
3079 | * Reset origin's unique bytes, if it exists. | |
3080 | */ | |
3081 | if (clone->ds_prev) { | |
3082 | dsl_dataset_t *origin = clone->ds_prev; | |
3083 | uint64_t comp, uncomp; | |
3084 | ||
3085 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
3086 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
3087 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, | |
3088 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
3089 | } | |
3090 | ||
3091 | /* swap blkptrs */ | |
3092 | { | |
86e3c28a CIK |
3093 | rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG); |
3094 | rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG); | |
70e083d2 TG |
3095 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
3096 | dsl_dataset_phys(origin_head)->ds_bp = | |
3097 | dsl_dataset_phys(clone)->ds_bp; | |
3098 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
86e3c28a CIK |
3099 | rrw_exit(&origin_head->ds_bp_rwlock, FTAG); |
3100 | rrw_exit(&clone->ds_bp_rwlock, FTAG); | |
70e083d2 TG |
3101 | } |
3102 | ||
3103 | /* set dd_*_bytes */ | |
3104 | { | |
3105 | int64_t dused, dcomp, duncomp; | |
3106 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
3107 | uint64_t odl_used, odl_comp, odl_uncomp; | |
3108 | ||
3109 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> | |
3110 | dd_used_breakdown[DD_USED_SNAP], ==, 0); | |
3111 | ||
3112 | dsl_deadlist_space(&clone->ds_deadlist, | |
3113 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3114 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
3115 | &odl_used, &odl_comp, &odl_uncomp); | |
3116 | ||
3117 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + | |
3118 | cdl_used - | |
3119 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
3120 | odl_used); | |
3121 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
3122 | cdl_comp - | |
3123 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
3124 | odl_comp); | |
3125 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
3126 | cdl_uncomp - | |
3127 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + | |
3128 | odl_uncomp); | |
3129 | ||
3130 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, | |
3131 | dused, dcomp, duncomp, tx); | |
3132 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
3133 | -dused, -dcomp, -duncomp, tx); | |
3134 | ||
3135 | /* | |
3136 | * The difference in the space used by snapshots is the | |
3137 | * difference in snapshot space due to the head's | |
3138 | * deadlist (since that's the only thing that's | |
3139 | * changing that affects the snapused). | |
3140 | */ | |
3141 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
3142 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3143 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3144 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
3145 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3146 | &odl_used, &odl_comp, &odl_uncomp); | |
3147 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
3148 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
3149 | } | |
3150 | ||
3151 | /* swap ds_*_bytes */ | |
3152 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, | |
3153 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
3154 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
3155 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
3156 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
3157 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
3158 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
3159 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
3160 | ||
3161 | /* apply any parent delta for change in unconsumed refreservation */ | |
3162 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
3163 | unused_refres_delta, 0, 0, tx); | |
3164 | ||
3165 | /* | |
3166 | * Swap deadlists. | |
3167 | */ | |
3168 | dsl_deadlist_close(&clone->ds_deadlist); | |
3169 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
3170 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, | |
3171 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
3172 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, | |
3173 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
3174 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, | |
3175 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); | |
3176 | ||
3177 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); | |
3178 | ||
3179 | spa_history_log_internal_ds(clone, "clone swap", tx, | |
3180 | "parent=%s", origin_head->ds_dir->dd_myname); | |
3181 | } | |
3182 | ||
3183 | /* | |
3184 | * Given a pool name and a dataset object number in that pool, | |
3185 | * return the name of that dataset. | |
3186 | */ | |
3187 | int | |
3188 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
3189 | { | |
3190 | dsl_pool_t *dp; | |
3191 | dsl_dataset_t *ds; | |
3192 | int error; | |
3193 | ||
3194 | error = dsl_pool_hold(pname, FTAG, &dp); | |
3195 | if (error != 0) | |
3196 | return (error); | |
3197 | ||
3198 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
3199 | if (error == 0) { | |
3200 | dsl_dataset_name(ds, buf); | |
3201 | dsl_dataset_rele(ds, FTAG); | |
3202 | } | |
3203 | dsl_pool_rele(dp, FTAG); | |
3204 | ||
3205 | return (error); | |
3206 | } | |
3207 | ||
3208 | int | |
3209 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, | |
3210 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
3211 | { | |
3212 | int error = 0; | |
3213 | ||
3214 | ASSERT3S(asize, >, 0); | |
3215 | ||
3216 | /* | |
3217 | * *ref_rsrv is the portion of asize that will come from any | |
3218 | * unconsumed refreservation space. | |
3219 | */ | |
3220 | *ref_rsrv = 0; | |
3221 | ||
3222 | mutex_enter(&ds->ds_lock); | |
3223 | /* | |
3224 | * Make a space adjustment for reserved bytes. | |
3225 | */ | |
3226 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { | |
3227 | ASSERT3U(*used, >=, | |
3228 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
3229 | *used -= | |
3230 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
3231 | *ref_rsrv = | |
3232 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
3233 | } | |
3234 | ||
3235 | if (!check_quota || ds->ds_quota == 0) { | |
3236 | mutex_exit(&ds->ds_lock); | |
3237 | return (0); | |
3238 | } | |
3239 | /* | |
3240 | * If they are requesting more space, and our current estimate | |
3241 | * is over quota, they get to try again unless the actual | |
3242 | * on-disk is over quota and there are no pending changes (which | |
3243 | * may free up space for us). | |
3244 | */ | |
3245 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= | |
3246 | ds->ds_quota) { | |
3247 | if (inflight > 0 || | |
3248 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) | |
3249 | error = SET_ERROR(ERESTART); | |
3250 | else | |
3251 | error = SET_ERROR(EDQUOT); | |
3252 | } | |
3253 | mutex_exit(&ds->ds_lock); | |
3254 | ||
3255 | return (error); | |
3256 | } | |
3257 | ||
3258 | typedef struct dsl_dataset_set_qr_arg { | |
3259 | const char *ddsqra_name; | |
3260 | zprop_source_t ddsqra_source; | |
3261 | uint64_t ddsqra_value; | |
3262 | } dsl_dataset_set_qr_arg_t; | |
3263 | ||
3264 | ||
3265 | /* ARGSUSED */ | |
3266 | static int | |
3267 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) | |
3268 | { | |
3269 | dsl_dataset_set_qr_arg_t *ddsqra = arg; | |
3270 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3271 | dsl_dataset_t *ds; | |
3272 | int error; | |
3273 | uint64_t newval; | |
3274 | ||
3275 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) | |
3276 | return (SET_ERROR(ENOTSUP)); | |
3277 | ||
3278 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); | |
3279 | if (error != 0) | |
3280 | return (error); | |
3281 | ||
3282 | if (ds->ds_is_snapshot) { | |
3283 | dsl_dataset_rele(ds, FTAG); | |
3284 | return (SET_ERROR(EINVAL)); | |
3285 | } | |
3286 | ||
3287 | error = dsl_prop_predict(ds->ds_dir, | |
3288 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3289 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3290 | if (error != 0) { | |
3291 | dsl_dataset_rele(ds, FTAG); | |
3292 | return (error); | |
3293 | } | |
3294 | ||
3295 | if (newval == 0) { | |
3296 | dsl_dataset_rele(ds, FTAG); | |
3297 | return (0); | |
3298 | } | |
3299 | ||
3300 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || | |
3301 | newval < ds->ds_reserved) { | |
3302 | dsl_dataset_rele(ds, FTAG); | |
3303 | return (SET_ERROR(ENOSPC)); | |
3304 | } | |
3305 | ||
3306 | dsl_dataset_rele(ds, FTAG); | |
3307 | return (0); | |
3308 | } | |
3309 | ||
3310 | static void | |
3311 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
3312 | { | |
3313 | dsl_dataset_set_qr_arg_t *ddsqra = arg; | |
3314 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
86e3c28a | 3315 | dsl_dataset_t *ds = NULL; |
70e083d2 TG |
3316 | uint64_t newval; |
3317 | ||
3318 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); | |
3319 | ||
3320 | dsl_prop_set_sync_impl(ds, | |
3321 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3322 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
3323 | &ddsqra->ddsqra_value, tx); | |
3324 | ||
3325 | VERIFY0(dsl_prop_get_int_ds(ds, | |
3326 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
3327 | ||
3328 | if (ds->ds_quota != newval) { | |
3329 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3330 | ds->ds_quota = newval; | |
3331 | } | |
3332 | dsl_dataset_rele(ds, FTAG); | |
3333 | } | |
3334 | ||
3335 | int | |
3336 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
3337 | uint64_t refquota) | |
3338 | { | |
3339 | dsl_dataset_set_qr_arg_t ddsqra; | |
3340 | ||
3341 | ddsqra.ddsqra_name = dsname; | |
3342 | ddsqra.ddsqra_source = source; | |
3343 | ddsqra.ddsqra_value = refquota; | |
3344 | ||
3345 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3346 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); | |
3347 | } | |
3348 | ||
3349 | static int | |
3350 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) | |
3351 | { | |
3352 | dsl_dataset_set_qr_arg_t *ddsqra = arg; | |
3353 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3354 | dsl_dataset_t *ds; | |
3355 | int error; | |
3356 | uint64_t newval, unique; | |
3357 | ||
3358 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) | |
3359 | return (SET_ERROR(ENOTSUP)); | |
3360 | ||
3361 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); | |
3362 | if (error != 0) | |
3363 | return (error); | |
3364 | ||
3365 | if (ds->ds_is_snapshot) { | |
3366 | dsl_dataset_rele(ds, FTAG); | |
3367 | return (SET_ERROR(EINVAL)); | |
3368 | } | |
3369 | ||
3370 | error = dsl_prop_predict(ds->ds_dir, | |
3371 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3372 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3373 | if (error != 0) { | |
3374 | dsl_dataset_rele(ds, FTAG); | |
3375 | return (error); | |
3376 | } | |
3377 | ||
3378 | /* | |
3379 | * If we are doing the preliminary check in open context, the | |
3380 | * space estimates may be inaccurate. | |
3381 | */ | |
3382 | if (!dmu_tx_is_syncing(tx)) { | |
3383 | dsl_dataset_rele(ds, FTAG); | |
3384 | return (0); | |
3385 | } | |
3386 | ||
3387 | mutex_enter(&ds->ds_lock); | |
3388 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3389 | dsl_dataset_recalc_head_uniq(ds); | |
3390 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; | |
3391 | mutex_exit(&ds->ds_lock); | |
3392 | ||
3393 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { | |
3394 | uint64_t delta = MAX(unique, newval) - | |
3395 | MAX(unique, ds->ds_reserved); | |
3396 | ||
3397 | if (delta > | |
3398 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3399 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3400 | dsl_dataset_rele(ds, FTAG); | |
3401 | return (SET_ERROR(ENOSPC)); | |
3402 | } | |
3403 | } | |
3404 | ||
3405 | dsl_dataset_rele(ds, FTAG); | |
3406 | return (0); | |
3407 | } | |
3408 | ||
3409 | void | |
3410 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3411 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
3412 | { | |
3413 | uint64_t newval; | |
3414 | uint64_t unique; | |
3415 | int64_t delta; | |
3416 | ||
3417 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3418 | source, sizeof (value), 1, &value, tx); | |
3419 | ||
3420 | VERIFY0(dsl_prop_get_int_ds(ds, | |
3421 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
3422 | ||
3423 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3424 | mutex_enter(&ds->ds_dir->dd_lock); | |
3425 | mutex_enter(&ds->ds_lock); | |
3426 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
3427 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; | |
3428 | delta = MAX(0, (int64_t)(newval - unique)) - | |
3429 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3430 | ds->ds_reserved = newval; | |
3431 | mutex_exit(&ds->ds_lock); | |
3432 | ||
3433 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); | |
3434 | mutex_exit(&ds->ds_dir->dd_lock); | |
3435 | } | |
3436 | ||
3437 | static void | |
3438 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
3439 | { | |
3440 | dsl_dataset_set_qr_arg_t *ddsqra = arg; | |
3441 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
86e3c28a | 3442 | dsl_dataset_t *ds = NULL; |
70e083d2 TG |
3443 | |
3444 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); | |
3445 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3446 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
3447 | dsl_dataset_rele(ds, FTAG); | |
3448 | } | |
3449 | ||
3450 | int | |
3451 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, | |
3452 | uint64_t refreservation) | |
3453 | { | |
3454 | dsl_dataset_set_qr_arg_t ddsqra; | |
3455 | ||
3456 | ddsqra.ddsqra_name = dsname; | |
3457 | ddsqra.ddsqra_source = source; | |
3458 | ddsqra.ddsqra_value = refreservation; | |
3459 | ||
3460 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, | |
3461 | dsl_dataset_set_refreservation_sync, &ddsqra, | |
3462 | 0, ZFS_SPACE_CHECK_NONE)); | |
3463 | } | |
3464 | ||
3465 | /* | |
3466 | * Return (in *usedp) the amount of space written in new that is not | |
3467 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3468 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3469 | * fail and return EINVAL. | |
3470 | * | |
3471 | * The written space is calculated by considering two components: First, we | |
3472 | * ignore any freed space, and calculate the written as new's used space | |
3473 | * minus old's used space. Next, we add in the amount of space that was freed | |
3474 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3475 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3476 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3477 | * | |
3478 | * space freed [---------------------] | |
3479 | * snapshots ---O-------O--------O-------O------ | |
3480 | * oldsnap new | |
3481 | */ | |
3482 | int | |
3483 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3484 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3485 | { | |
3486 | int err = 0; | |
3487 | uint64_t snapobj; | |
3488 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3489 | ||
3490 | ASSERT(dsl_pool_config_held(dp)); | |
3491 | ||
3492 | *usedp = 0; | |
3493 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; | |
3494 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
3495 | ||
3496 | *compp = 0; | |
3497 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; | |
3498 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
3499 | ||
3500 | *uncompp = 0; | |
3501 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; | |
3502 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
3503 | ||
3504 | snapobj = new->ds_object; | |
3505 | while (snapobj != oldsnap->ds_object) { | |
3506 | dsl_dataset_t *snap; | |
3507 | uint64_t used, comp, uncomp; | |
3508 | ||
3509 | if (snapobj == new->ds_object) { | |
3510 | snap = new; | |
3511 | } else { | |
3512 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3513 | if (err != 0) | |
3514 | break; | |
3515 | } | |
3516 | ||
3517 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == | |
3518 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
3519 | /* | |
3520 | * The blocks in the deadlist can not be born after | |
3521 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3522 | * which is more efficient (especially for old-format | |
3523 | * deadlists). Unfortunately the deadlist code | |
3524 | * doesn't have enough information to make this | |
3525 | * optimization itself. | |
3526 | */ | |
3527 | dsl_deadlist_space(&snap->ds_deadlist, | |
3528 | &used, &comp, &uncomp); | |
3529 | } else { | |
3530 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
3531 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, | |
3532 | &used, &comp, &uncomp); | |
3533 | } | |
3534 | *usedp += used; | |
3535 | *compp += comp; | |
3536 | *uncompp += uncomp; | |
3537 | ||
3538 | /* | |
3539 | * If we get to the beginning of the chain of snapshots | |
3540 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3541 | * was not a snapshot of/before new. | |
3542 | */ | |
3543 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; | |
3544 | if (snap != new) | |
3545 | dsl_dataset_rele(snap, FTAG); | |
3546 | if (snapobj == 0) { | |
3547 | err = SET_ERROR(EINVAL); | |
3548 | break; | |
3549 | } | |
3550 | ||
3551 | } | |
3552 | return (err); | |
3553 | } | |
3554 | ||
3555 | /* | |
3556 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3557 | * lastsnap, and all snapshots in between are deleted. | |
3558 | * | |
3559 | * blocks that would be freed [---------------------------] | |
3560 | * snapshots ---O-------O--------O-------O--------O | |
3561 | * firstsnap lastsnap | |
3562 | * | |
3563 | * This is the set of blocks that were born after the snap before firstsnap, | |
3564 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3565 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3566 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3567 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3568 | * space on the deadlist that was born after the snap before firstsnap. | |
3569 | */ | |
3570 | int | |
3571 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3572 | dsl_dataset_t *lastsnap, | |
3573 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3574 | { | |
3575 | int err = 0; | |
3576 | uint64_t snapobj; | |
3577 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3578 | ||
3579 | ASSERT(firstsnap->ds_is_snapshot); | |
3580 | ASSERT(lastsnap->ds_is_snapshot); | |
3581 | ||
3582 | /* | |
3583 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3584 | * is before lastsnap. | |
3585 | */ | |
3586 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
3587 | dsl_dataset_phys(firstsnap)->ds_creation_txg > | |
3588 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
3589 | return (SET_ERROR(EINVAL)); | |
3590 | ||
3591 | *usedp = *compp = *uncompp = 0; | |
3592 | ||
3593 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; | |
3594 | while (snapobj != firstsnap->ds_object) { | |
3595 | dsl_dataset_t *ds; | |
3596 | uint64_t used, comp, uncomp; | |
3597 | ||
3598 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3599 | if (err != 0) | |
3600 | break; | |
3601 | ||
3602 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
3603 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, | |
3604 | &used, &comp, &uncomp); | |
3605 | *usedp += used; | |
3606 | *compp += comp; | |
3607 | *uncompp += uncomp; | |
3608 | ||
3609 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; | |
3610 | ASSERT3U(snapobj, !=, 0); | |
3611 | dsl_dataset_rele(ds, FTAG); | |
3612 | } | |
3613 | return (err); | |
3614 | } | |
3615 | ||
70e083d2 TG |
3616 | /* |
3617 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3618 | * For example, they could both be snapshots of the same filesystem, and | |
3619 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3620 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3621 | * filesystem. Or 'earlier' could be the origin's origin. | |
3622 | * | |
3623 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
3624 | */ | |
3625 | boolean_t | |
3626 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, | |
86e3c28a | 3627 | uint64_t earlier_txg) |
70e083d2 TG |
3628 | { |
3629 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3630 | int error; | |
3631 | boolean_t ret; | |
3632 | dsl_dataset_t *origin; | |
3633 | ||
3634 | ASSERT(dsl_pool_config_held(dp)); | |
3635 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); | |
3636 | ||
3637 | if (earlier_txg == 0) | |
3638 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; | |
3639 | ||
3640 | if (later->ds_is_snapshot && | |
3641 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) | |
3642 | return (B_FALSE); | |
3643 | ||
3644 | if (later->ds_dir == earlier->ds_dir) | |
3645 | return (B_TRUE); | |
3646 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3647 | return (B_FALSE); | |
3648 | ||
3649 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) | |
3650 | return (B_TRUE); | |
3651 | error = dsl_dataset_hold_obj(dp, | |
3652 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); | |
3653 | if (error != 0) | |
3654 | return (B_FALSE); | |
3655 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); | |
3656 | dsl_dataset_rele(origin, FTAG); | |
3657 | return (ret); | |
3658 | } | |
3659 | ||
70e083d2 TG |
3660 | void |
3661 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3662 | { | |
3663 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3664 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3665 | } | |
3666 | ||
86e3c28a CIK |
3667 | boolean_t |
3668 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
3669 | { | |
3670 | dmu_object_info_t doi; | |
3671 | ||
3672 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
3673 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
3674 | } | |
3675 | ||
3676 | boolean_t | |
3677 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
3678 | { | |
3679 | return (dsl_dataset_is_zapified(ds) && | |
3680 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
3681 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
3682 | } | |
3683 | ||
70e083d2 TG |
3684 | #if defined(_KERNEL) && defined(HAVE_SPL) |
3685 | #if defined(_LP64) | |
3686 | module_param(zfs_max_recordsize, int, 0644); | |
3687 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3688 | #else | |
3689 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3690 | module_param(zfs_max_recordsize, int, 0444); | |
3691 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3692 | #endif | |
3693 | ||
3694 | EXPORT_SYMBOL(dsl_dataset_hold); | |
3695 | EXPORT_SYMBOL(dsl_dataset_hold_obj); | |
3696 | EXPORT_SYMBOL(dsl_dataset_own); | |
3697 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3698 | EXPORT_SYMBOL(dsl_dataset_name); | |
3699 | EXPORT_SYMBOL(dsl_dataset_rele); | |
3700 | EXPORT_SYMBOL(dsl_dataset_disown); | |
3701 | EXPORT_SYMBOL(dsl_dataset_tryown); | |
3702 | EXPORT_SYMBOL(dsl_dataset_create_sync); | |
3703 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
3704 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); | |
3705 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
3706 | EXPORT_SYMBOL(dsl_dataset_promote); | |
3707 | EXPORT_SYMBOL(dsl_dataset_user_hold); | |
3708 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
3709 | EXPORT_SYMBOL(dsl_dataset_get_holds); | |
3710 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
70e083d2 TG |
3711 | EXPORT_SYMBOL(dsl_dataset_get_spa); |
3712 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); | |
3713 | EXPORT_SYMBOL(dsl_dataset_space_written); | |
3714 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
3715 | EXPORT_SYMBOL(dsl_dataset_sync); | |
3716 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3717 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
70e083d2 TG |
3718 | EXPORT_SYMBOL(dsl_dataset_dirty); |
3719 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3720 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3721 | EXPORT_SYMBOL(dsl_dataset_space); | |
3722 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3723 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3724 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
3725 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); | |
3726 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
3727 | #endif |