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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
9b7b9cd3 | 21 | |
34dc7c2f | 22 | /* |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
39efbde7 | 24 | * Copyright (c) 2011, 2016 by Delphix. All rights reserved. |
788eb90c | 25 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
36f92e93 | 26 | * Copyright (c) 2014 RackTop Systems. |
0c66c32d | 27 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
a0bd735a | 28 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. |
8c62a0d0 | 29 | * Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved. |
9b7b9cd3 | 30 | * Copyright 2017 Nexenta Systems, Inc. |
34dc7c2f BB |
31 | */ |
32 | ||
34dc7c2f BB |
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> | |
37abac6d | 39 | #include <sys/dmu_impl.h> |
34dc7c2f BB |
40 | #include <sys/dmu_tx.h> |
41 | #include <sys/arc.h> | |
42 | #include <sys/zio.h> | |
43 | #include <sys/zap.h> | |
9ae529ec | 44 | #include <sys/zfeature.h> |
34dc7c2f BB |
45 | #include <sys/unique.h> |
46 | #include <sys/zfs_context.h> | |
47 | #include <sys/zfs_ioctl.h> | |
48 | #include <sys/spa.h> | |
b128c09f | 49 | #include <sys/zfs_znode.h> |
572e2857 | 50 | #include <sys/zfs_onexit.h> |
45d1cae3 | 51 | #include <sys/zvol.h> |
428870ff BB |
52 | #include <sys/dsl_scan.h> |
53 | #include <sys/dsl_deadlist.h> | |
13fe0198 MA |
54 | #include <sys/dsl_destroy.h> |
55 | #include <sys/dsl_userhold.h> | |
da536844 | 56 | #include <sys/dsl_bookmark.h> |
f74b821a | 57 | #include <sys/policy.h> |
47dfff3b MA |
58 | #include <sys/dmu_send.h> |
59 | #include <sys/zio_compress.h> | |
60 | #include <zfs_fletcher.h> | |
3c67d83a | 61 | #include <sys/zio_checksum.h> |
34dc7c2f | 62 | |
f1512ee6 MA |
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 | ||
428870ff BB |
74 | #define SWITCH64(x, y) \ |
75 | { \ | |
76 | uint64_t __tmp = (x); \ | |
77 | (x) = (y); \ | |
78 | (y) = __tmp; \ | |
79 | } | |
80 | ||
34dc7c2f BB |
81 | #define DS_REF_MAX (1ULL << 62) |
82 | ||
d683ddbb | 83 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 84 | |
8c62a0d0 DM |
85 | extern int spa_asize_inflation; |
86 | ||
0efd9791 AG |
87 | static zil_header_t zero_zil; |
88 | ||
34dc7c2f | 89 | /* |
4e33ba4c | 90 | * Figure out how much of this delta should be propagated to the dsl_dir |
34dc7c2f BB |
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 | { | |
d683ddbb | 97 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
98 | uint64_t old_bytes, new_bytes; |
99 | ||
100 | if (ds->ds_reserved == 0) | |
101 | return (delta); | |
102 | ||
d683ddbb JG |
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); | |
34dc7c2f BB |
106 | |
107 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
108 | return (new_bytes - old_bytes); | |
109 | } | |
110 | ||
111 | void | |
428870ff | 112 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 113 | { |
d6320ddb | 114 | int used, compressed, uncompressed; |
34dc7c2f BB |
115 | int64_t delta; |
116 | ||
d6320ddb BB |
117 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
118 | compressed = BP_GET_PSIZE(bp); | |
119 | uncompressed = BP_GET_UCSIZE(bp); | |
120 | ||
428870ff | 121 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
122 | |
123 | ASSERT(dmu_tx_is_syncing(tx)); | |
124 | /* It could have been compressed away to nothing */ | |
125 | if (BP_IS_HOLE(bp)) | |
126 | return; | |
127 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 128 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 129 | if (ds == NULL) { |
29809a6c MA |
130 | dsl_pool_mos_diduse_space(tx->tx_pool, |
131 | used, compressed, uncompressed); | |
34dc7c2f BB |
132 | return; |
133 | } | |
428870ff | 134 | |
0efd9791 | 135 | ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); |
a169a625 | 136 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
137 | mutex_enter(&ds->ds_lock); |
138 | delta = parent_delta(ds, used); | |
d683ddbb JG |
139 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
140 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
141 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
142 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
3c67d83a | 143 | |
241b5415 MA |
144 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
145 | ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = | |
146 | B_TRUE; | |
147 | } | |
3c67d83a | 148 | |
1c27024e | 149 | spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); |
3c67d83a TH |
150 | if (f != SPA_FEATURE_NONE) |
151 | ds->ds_feature_activation_needed[f] = B_TRUE; | |
152 | ||
34dc7c2f | 153 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
154 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
155 | compressed, uncompressed, tx); | |
156 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
157 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
158 | } |
159 | ||
b128c09f | 160 | int |
428870ff BB |
161 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
162 | boolean_t async) | |
34dc7c2f | 163 | { |
b0bc7a84 MG |
164 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
165 | int compressed = BP_GET_PSIZE(bp); | |
166 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 167 | |
34dc7c2f | 168 | if (BP_IS_HOLE(bp)) |
b128c09f | 169 | return (0); |
34dc7c2f | 170 | |
428870ff BB |
171 | ASSERT(dmu_tx_is_syncing(tx)); |
172 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
173 | ||
34dc7c2f | 174 | if (ds == NULL) { |
428870ff | 175 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
176 | dsl_pool_mos_diduse_space(tx->tx_pool, |
177 | -used, -compressed, -uncompressed); | |
b128c09f | 178 | return (used); |
34dc7c2f BB |
179 | } |
180 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
181 | ||
0c66c32d | 182 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
183 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
184 | ||
d683ddbb | 185 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
186 | int64_t delta; |
187 | ||
428870ff BB |
188 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
189 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
190 | |
191 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 192 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
193 | !DS_UNIQUE_IS_ACCURATE(ds)); |
194 | delta = parent_delta(ds, -used); | |
d683ddbb | 195 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 196 | mutex_exit(&ds->ds_lock); |
b128c09f | 197 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 198 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
199 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
200 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
201 | } else { |
202 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
203 | if (async) { |
204 | /* | |
205 | * We are here as part of zio's write done callback, | |
206 | * which means we're a zio interrupt thread. We can't | |
207 | * call dsl_deadlist_insert() now because it may block | |
208 | * waiting for I/O. Instead, put bp on the deferred | |
209 | * queue and let dsl_pool_sync() finish the job. | |
210 | */ | |
211 | bplist_append(&ds->ds_pending_deadlist, bp); | |
212 | } else { | |
213 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
214 | } | |
34dc7c2f | 215 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
216 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
217 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 218 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 219 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 220 | ds->ds_object && bp->blk_birth > |
d683ddbb | 221 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
222 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
223 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 224 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
225 | mutex_exit(&ds->ds_prev->ds_lock); |
226 | } | |
428870ff | 227 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
228 | dsl_dir_transfer_space(ds->ds_dir, used, |
229 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
230 | } | |
34dc7c2f BB |
231 | } |
232 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
233 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
234 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
235 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
236 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
237 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
238 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 239 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
240 | |
241 | return (used); | |
34dc7c2f BB |
242 | } |
243 | ||
39efbde7 GM |
244 | /* |
245 | * We have to release the fsid syncronously or we risk that a subsequent | |
246 | * mount of the same dataset will fail to unique_insert the fsid. This | |
247 | * failure would manifest itself as the fsid of this dataset changing | |
248 | * between mounts which makes NFS clients quite unhappy. | |
249 | */ | |
34dc7c2f | 250 | static void |
39efbde7 | 251 | dsl_dataset_evict_sync(void *dbu) |
34dc7c2f | 252 | { |
0c66c32d | 253 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 254 | |
13fe0198 | 255 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 256 | |
34dc7c2f | 257 | unique_remove(ds->ds_fsid_guid); |
39efbde7 GM |
258 | } |
259 | ||
260 | static void | |
261 | dsl_dataset_evict_async(void *dbu) | |
262 | { | |
263 | dsl_dataset_t *ds = dbu; | |
264 | ||
265 | ASSERT(ds->ds_owner == NULL); | |
266 | ||
267 | ds->ds_dbuf = NULL; | |
34dc7c2f | 268 | |
428870ff BB |
269 | if (ds->ds_objset != NULL) |
270 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
271 | |
272 | if (ds->ds_prev) { | |
13fe0198 | 273 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
274 | ds->ds_prev = NULL; |
275 | } | |
276 | ||
428870ff | 277 | bplist_destroy(&ds->ds_pending_deadlist); |
0c66c32d | 278 | if (ds->ds_deadlist.dl_os != NULL) |
428870ff | 279 | dsl_deadlist_close(&ds->ds_deadlist); |
b128c09f | 280 | if (ds->ds_dir) |
0c66c32d | 281 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
282 | |
283 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
284 | ||
0eb21616 | 285 | list_destroy(&ds->ds_prop_cbs); |
34dc7c2f BB |
286 | mutex_destroy(&ds->ds_lock); |
287 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 288 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 289 | refcount_destroy(&ds->ds_longholds); |
cc9bb3e5 | 290 | rrw_destroy(&ds->ds_bp_rwlock); |
34dc7c2f BB |
291 | |
292 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
293 | } | |
294 | ||
13fe0198 | 295 | int |
34dc7c2f BB |
296 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
297 | { | |
298 | dsl_dataset_phys_t *headphys; | |
299 | int err; | |
300 | dmu_buf_t *headdbuf; | |
301 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
302 | objset_t *mos = dp->dp_meta_objset; | |
303 | ||
304 | if (ds->ds_snapname[0]) | |
305 | return (0); | |
d683ddbb | 306 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
307 | return (0); |
308 | ||
d683ddbb | 309 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 310 | FTAG, &headdbuf); |
13fe0198 | 311 | if (err != 0) |
34dc7c2f BB |
312 | return (err); |
313 | headphys = headdbuf->db_data; | |
314 | err = zap_value_search(dp->dp_meta_objset, | |
315 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
316 | if (err != 0 && zfs_recover == B_TRUE) { |
317 | err = 0; | |
318 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
319 | "SNAPOBJ=%llu-ERR=%d", | |
320 | (unsigned long long)ds->ds_object, err); | |
321 | } | |
34dc7c2f BB |
322 | dmu_buf_rele(headdbuf, FTAG); |
323 | return (err); | |
324 | } | |
325 | ||
6772fb67 | 326 | int |
b128c09f | 327 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 328 | { |
b128c09f | 329 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 330 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 331 | matchtype_t mt = 0; |
34dc7c2f BB |
332 | int err; |
333 | ||
d683ddbb | 334 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 335 | mt = MT_NORMALIZE; |
34dc7c2f | 336 | |
b128c09f | 337 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f | 338 | value, mt, NULL, 0, NULL); |
9b7b9cd3 | 339 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 340 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
341 | return (err); |
342 | } | |
343 | ||
13fe0198 | 344 | int |
788eb90c JJ |
345 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
346 | boolean_t adj_cnt) | |
34dc7c2f | 347 | { |
b128c09f | 348 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 349 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 350 | matchtype_t mt = 0; |
34dc7c2f BB |
351 | int err; |
352 | ||
428870ff BB |
353 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
354 | ||
d683ddbb | 355 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 356 | mt = MT_NORMALIZE; |
34dc7c2f | 357 | |
b128c09f | 358 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
9b7b9cd3 | 359 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 360 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
361 | |
362 | if (err == 0 && adj_cnt) | |
363 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
364 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
365 | ||
34dc7c2f BB |
366 | return (err); |
367 | } | |
368 | ||
6ebebace JG |
369 | boolean_t |
370 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
371 | { | |
6186e297 JG |
372 | dmu_buf_t *dbuf = ds->ds_dbuf; |
373 | boolean_t result = B_FALSE; | |
374 | ||
375 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
376 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
377 | ||
378 | if (ds == dmu_buf_get_user(dbuf)) | |
379 | result = B_TRUE; | |
380 | else | |
381 | dmu_buf_rele(dbuf, tag); | |
382 | } | |
383 | ||
384 | return (result); | |
6ebebace JG |
385 | } |
386 | ||
13fe0198 | 387 | int |
b5256303 TC |
388 | dsl_dataset_hold_obj_flags(dsl_pool_t *dp, uint64_t dsobj, |
389 | ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp) | |
34dc7c2f | 390 | { |
34dc7c2f BB |
391 | objset_t *mos = dp->dp_meta_objset; |
392 | dmu_buf_t *dbuf; | |
393 | dsl_dataset_t *ds; | |
394 | int err; | |
572e2857 | 395 | dmu_object_info_t doi; |
34dc7c2f | 396 | |
13fe0198 | 397 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
398 | |
399 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 400 | if (err != 0) |
34dc7c2f | 401 | return (err); |
572e2857 BB |
402 | |
403 | /* Make sure dsobj has the correct object type. */ | |
404 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 405 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 406 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 407 | return (SET_ERROR(EINVAL)); |
3a84951d | 408 | } |
572e2857 | 409 | |
34dc7c2f BB |
410 | ds = dmu_buf_get_user(dbuf); |
411 | if (ds == NULL) { | |
d4ed6673 | 412 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 413 | |
79c76d5b | 414 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
415 | ds->ds_dbuf = dbuf; |
416 | ds->ds_object = dsobj; | |
0c66c32d | 417 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 418 | list_link_init(&ds->ds_synced_link); |
34dc7c2f BB |
419 | |
420 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
421 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 422 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
cc9bb3e5 | 423 | rrw_init(&ds->ds_bp_rwlock, B_FALSE); |
13fe0198 | 424 | refcount_create(&ds->ds_longholds); |
34dc7c2f | 425 | |
428870ff BB |
426 | bplist_create(&ds->ds_pending_deadlist); |
427 | dsl_deadlist_open(&ds->ds_deadlist, | |
d683ddbb | 428 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); |
428870ff | 429 | |
37abac6d BP |
430 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
431 | offsetof(dmu_sendarg_t, dsa_link)); | |
432 | ||
0eb21616 JG |
433 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
434 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
435 | ||
f1512ee6 | 436 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
437 | spa_feature_t f; |
438 | ||
439 | for (f = 0; f < SPA_FEATURES; f++) { | |
440 | if (!(spa_feature_table[f].fi_flags & | |
441 | ZFEATURE_FLAG_PER_DATASET)) | |
442 | continue; | |
443 | err = zap_contains(mos, dsobj, | |
444 | spa_feature_table[f].fi_guid); | |
445 | if (err == 0) { | |
446 | ds->ds_feature_inuse[f] = B_TRUE; | |
447 | } else { | |
448 | ASSERT3U(err, ==, ENOENT); | |
449 | err = 0; | |
450 | } | |
19b3b1d2 | 451 | } |
f1512ee6 MA |
452 | } |
453 | ||
241b5415 MA |
454 | err = dsl_dir_hold_obj(dp, |
455 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
13fe0198 | 456 | if (err != 0) { |
34dc7c2f BB |
457 | mutex_destroy(&ds->ds_lock); |
458 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 459 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 460 | refcount_destroy(&ds->ds_longholds); |
428870ff BB |
461 | bplist_destroy(&ds->ds_pending_deadlist); |
462 | dsl_deadlist_close(&ds->ds_deadlist); | |
34dc7c2f BB |
463 | kmem_free(ds, sizeof (dsl_dataset_t)); |
464 | dmu_buf_rele(dbuf, tag); | |
465 | return (err); | |
466 | } | |
467 | ||
0c66c32d | 468 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 469 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 470 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 471 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 472 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 473 | ds, &ds->ds_prev); |
34dc7c2f | 474 | } |
da536844 MA |
475 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
476 | int zaperr = zap_lookup(mos, ds->ds_object, | |
477 | DS_FIELD_BOOKMARK_NAMES, | |
478 | sizeof (ds->ds_bookmarks), 1, | |
479 | &ds->ds_bookmarks); | |
480 | if (zaperr != ENOENT) | |
481 | VERIFY0(zaperr); | |
482 | } | |
45d1cae3 BB |
483 | } else { |
484 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
485 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
486 | if (err == 0 && |
487 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
488 | err = zap_count( |
489 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 490 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
491 | &ds->ds_userrefs); |
492 | } | |
34dc7c2f BB |
493 | } |
494 | ||
0c66c32d | 495 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
496 | err = dsl_prop_get_int_ds(ds, |
497 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
498 | &ds->ds_reserved); | |
34dc7c2f | 499 | if (err == 0) { |
13fe0198 MA |
500 | err = dsl_prop_get_int_ds(ds, |
501 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
502 | &ds->ds_quota); | |
34dc7c2f | 503 | } |
34dc7c2f BB |
504 | } else { |
505 | ds->ds_reserved = ds->ds_quota = 0; | |
506 | } | |
507 | ||
39efbde7 GM |
508 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync, |
509 | dsl_dataset_evict_async, &ds->ds_dbuf); | |
0c66c32d JG |
510 | if (err == 0) |
511 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
512 | ||
513 | if (err != 0 || winner != NULL) { | |
428870ff BB |
514 | bplist_destroy(&ds->ds_pending_deadlist); |
515 | dsl_deadlist_close(&ds->ds_deadlist); | |
b128c09f | 516 | if (ds->ds_prev) |
13fe0198 MA |
517 | dsl_dataset_rele(ds->ds_prev, ds); |
518 | dsl_dir_rele(ds->ds_dir, ds); | |
34dc7c2f BB |
519 | mutex_destroy(&ds->ds_lock); |
520 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 521 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 522 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f | 523 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 524 | if (err != 0) { |
34dc7c2f BB |
525 | dmu_buf_rele(dbuf, tag); |
526 | return (err); | |
527 | } | |
528 | ds = winner; | |
529 | } else { | |
530 | ds->ds_fsid_guid = | |
d683ddbb | 531 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
39efbde7 GM |
532 | if (ds->ds_fsid_guid != |
533 | dsl_dataset_phys(ds)->ds_fsid_guid) { | |
534 | zfs_dbgmsg("ds_fsid_guid changed from " | |
535 | "%llx to %llx for pool %s dataset id %llu", | |
536 | (long long) | |
537 | dsl_dataset_phys(ds)->ds_fsid_guid, | |
538 | (long long)ds->ds_fsid_guid, | |
539 | spa_name(dp->dp_spa), | |
540 | dsobj); | |
541 | } | |
34dc7c2f BB |
542 | } |
543 | } | |
544 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
d683ddbb JG |
545 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
546 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
547 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
548 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f | 549 | *dsp = ds; |
b5256303 TC |
550 | |
551 | if ((flags & DS_HOLD_FLAG_DECRYPT) && ds->ds_dir->dd_crypto_obj != 0) { | |
552 | err = spa_keystore_create_mapping(dp->dp_spa, ds, ds); | |
553 | if (err != 0) { | |
554 | dsl_dataset_rele(ds, tag); | |
555 | return (SET_ERROR(EACCES)); | |
556 | } | |
557 | } | |
558 | ||
34dc7c2f BB |
559 | return (0); |
560 | } | |
561 | ||
b128c09f | 562 | int |
b5256303 TC |
563 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
564 | dsl_dataset_t **dsp) | |
565 | { | |
566 | return (dsl_dataset_hold_obj_flags(dp, dsobj, 0, tag, dsp)); | |
567 | } | |
568 | ||
569 | int | |
570 | dsl_dataset_hold_flags(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
428870ff | 571 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
572 | { |
573 | dsl_dir_t *dd; | |
b128c09f | 574 | const char *snapname; |
34dc7c2f | 575 | uint64_t obj; |
34dc7c2f | 576 | int err = 0; |
fcff0f35 | 577 | dsl_dataset_t *ds; |
34dc7c2f | 578 | |
13fe0198 MA |
579 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
580 | if (err != 0) | |
34dc7c2f BB |
581 | return (err); |
582 | ||
13fe0198 | 583 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 584 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 | 585 | if (obj != 0) |
b5256303 | 586 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, &ds); |
b128c09f | 587 | else |
2e528b49 | 588 | err = SET_ERROR(ENOENT); |
34dc7c2f | 589 | |
b128c09f BB |
590 | /* we may be looking for a snapshot */ |
591 | if (err == 0 && snapname != NULL) { | |
fcff0f35 | 592 | dsl_dataset_t *snap_ds; |
34dc7c2f | 593 | |
b128c09f | 594 | if (*snapname++ != '@') { |
b5256303 | 595 | dsl_dataset_rele_flags(ds, flags, tag); |
13fe0198 | 596 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 597 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 598 | } |
34dc7c2f | 599 | |
b128c09f | 600 | dprintf("looking for snapshot '%s'\n", snapname); |
fcff0f35 | 601 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
b5256303 TC |
602 | if (err == 0) { |
603 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, | |
604 | &snap_ds); | |
605 | } | |
606 | dsl_dataset_rele_flags(ds, flags, tag); | |
b128c09f | 607 | |
13fe0198 | 608 | if (err == 0) { |
fcff0f35 PD |
609 | mutex_enter(&snap_ds->ds_lock); |
610 | if (snap_ds->ds_snapname[0] == 0) | |
611 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
612 | sizeof (snap_ds->ds_snapname)); | |
613 | mutex_exit(&snap_ds->ds_lock); | |
614 | ds = snap_ds; | |
34dc7c2f | 615 | } |
34dc7c2f | 616 | } |
fcff0f35 PD |
617 | if (err == 0) |
618 | *dsp = ds; | |
13fe0198 | 619 | dsl_dir_rele(dd, FTAG); |
34dc7c2f BB |
620 | return (err); |
621 | } | |
622 | ||
623 | int | |
b5256303 TC |
624 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, void *tag, |
625 | dsl_dataset_t **dsp) | |
626 | { | |
627 | return (dsl_dataset_hold_flags(dp, name, 0, tag, dsp)); | |
628 | } | |
629 | ||
630 | int | |
631 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags, | |
428870ff | 632 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 633 | { |
b5256303 | 634 | int err = dsl_dataset_hold_obj_flags(dp, dsobj, flags, tag, dsp); |
13fe0198 MA |
635 | if (err != 0) |
636 | return (err); | |
637 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
b5256303 | 638 | dsl_dataset_rele_flags(*dsp, flags, tag); |
13fe0198 | 639 | *dsp = NULL; |
2e528b49 | 640 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
641 | } |
642 | return (0); | |
643 | } | |
644 | ||
645 | int | |
b5256303 | 646 | dsl_dataset_own(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, |
13fe0198 MA |
647 | void *tag, dsl_dataset_t **dsp) |
648 | { | |
b5256303 | 649 | int err = dsl_dataset_hold_flags(dp, name, flags, tag, dsp); |
13fe0198 | 650 | if (err != 0) |
b128c09f | 651 | return (err); |
13fe0198 | 652 | if (!dsl_dataset_tryown(*dsp, tag)) { |
b5256303 | 653 | dsl_dataset_rele_flags(*dsp, flags, tag); |
2e528b49 | 654 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
655 | } |
656 | return (0); | |
34dc7c2f BB |
657 | } |
658 | ||
13fe0198 MA |
659 | /* |
660 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
661 | * hold is used to prevent destruction of a dataset while the pool hold | |
662 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
663 | * | |
664 | * The dataset and pool must be held when this function is called. After it | |
665 | * is called, the pool hold may be released while the dataset is still held | |
666 | * and accessed. | |
667 | */ | |
668 | void | |
669 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
670 | { | |
671 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
672 | (void) refcount_add(&ds->ds_longholds, tag); | |
673 | } | |
674 | ||
675 | void | |
676 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
677 | { | |
678 | (void) refcount_remove(&ds->ds_longholds, tag); | |
679 | } | |
680 | ||
681 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
682 | boolean_t | |
683 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
684 | { | |
685 | return (!refcount_is_zero(&ds->ds_longholds)); | |
686 | } | |
687 | ||
34dc7c2f BB |
688 | void |
689 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
690 | { | |
691 | if (ds == NULL) { | |
692 | (void) strcpy(name, "mos"); | |
693 | } else { | |
694 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 695 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f | 696 | if (ds->ds_snapname[0]) { |
eca7b760 IK |
697 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
698 | <, ZFS_MAX_DATASET_NAME_LEN); | |
b128c09f BB |
699 | /* |
700 | * We use a "recursive" mutex so that we | |
701 | * can call dprintf_ds() with ds_lock held. | |
702 | */ | |
34dc7c2f | 703 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f | 704 | mutex_enter(&ds->ds_lock); |
eca7b760 IK |
705 | VERIFY3U(strlcat(name, ds->ds_snapname, |
706 | ZFS_MAX_DATASET_NAME_LEN), <, | |
707 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
708 | mutex_exit(&ds->ds_lock); |
709 | } else { | |
eca7b760 IK |
710 | VERIFY3U(strlcat(name, ds->ds_snapname, |
711 | ZFS_MAX_DATASET_NAME_LEN), <, | |
712 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
713 | } |
714 | } | |
715 | } | |
716 | } | |
717 | ||
eca7b760 IK |
718 | int |
719 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
720 | { | |
eca7b760 IK |
721 | VERIFY0(dsl_dataset_get_snapname(ds)); |
722 | mutex_enter(&ds->ds_lock); | |
1c27024e | 723 | int len = strlen(ds->ds_snapname); |
a806cb6a CC |
724 | /* add '@' if ds is a snap */ |
725 | if (len > 0) | |
726 | len++; | |
727 | len += dsl_dir_namelen(ds->ds_dir); | |
eca7b760 IK |
728 | mutex_exit(&ds->ds_lock); |
729 | return (len); | |
730 | } | |
731 | ||
34dc7c2f | 732 | void |
b5256303 | 733 | dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) |
b128c09f | 734 | { |
b5256303 TC |
735 | if (ds->ds_dir != NULL && ds->ds_dir->dd_crypto_obj != 0 && |
736 | (flags & DS_HOLD_FLAG_DECRYPT)) { | |
737 | (void) spa_keystore_remove_mapping(ds->ds_dir->dd_pool->dp_spa, | |
738 | ds->ds_object, ds); | |
739 | } | |
740 | ||
13fe0198 | 741 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
742 | } |
743 | ||
744 | void | |
b5256303 TC |
745 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
746 | { | |
747 | dsl_dataset_rele_flags(ds, 0, tag); | |
748 | } | |
749 | ||
750 | void | |
751 | dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) | |
34dc7c2f | 752 | { |
945dd935 JG |
753 | ASSERT3P(ds->ds_owner, ==, tag); |
754 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 755 | |
34dc7c2f | 756 | mutex_enter(&ds->ds_lock); |
b128c09f | 757 | ds->ds_owner = NULL; |
34dc7c2f | 758 | mutex_exit(&ds->ds_lock); |
13fe0198 | 759 | dsl_dataset_long_rele(ds, tag); |
b5256303 | 760 | dsl_dataset_rele_flags(ds, flags, tag); |
34dc7c2f BB |
761 | } |
762 | ||
763 | boolean_t | |
13fe0198 | 764 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 765 | { |
b128c09f BB |
766 | boolean_t gotit = FALSE; |
767 | ||
47dfff3b | 768 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
34dc7c2f | 769 | mutex_enter(&ds->ds_lock); |
13fe0198 | 770 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 771 | ds->ds_owner = tag; |
13fe0198 | 772 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 773 | gotit = TRUE; |
34dc7c2f BB |
774 | } |
775 | mutex_exit(&ds->ds_lock); | |
b128c09f | 776 | return (gotit); |
34dc7c2f BB |
777 | } |
778 | ||
47dfff3b MA |
779 | boolean_t |
780 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
781 | { | |
782 | boolean_t rv; | |
783 | mutex_enter(&ds->ds_lock); | |
784 | rv = (ds->ds_owner != NULL); | |
785 | mutex_exit(&ds->ds_lock); | |
786 | return (rv); | |
787 | } | |
788 | ||
b5256303 | 789 | void |
241b5415 MA |
790 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) |
791 | { | |
792 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
793 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
794 | uint64_t zero = 0; | |
795 | ||
796 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
797 | ||
798 | spa_feature_incr(spa, f, tx); | |
799 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
800 | ||
801 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
802 | sizeof (zero), 1, &zero, tx)); | |
803 | } | |
804 | ||
805 | void | |
806 | dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
807 | { | |
808 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
809 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
810 | ||
811 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
812 | ||
813 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
814 | spa_feature_decr(spa, f, tx); | |
815 | } | |
816 | ||
34dc7c2f | 817 | uint64_t |
b128c09f | 818 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
b5256303 | 819 | dsl_crypto_params_t *dcp, uint64_t flags, dmu_tx_t *tx) |
34dc7c2f BB |
820 | { |
821 | dsl_pool_t *dp = dd->dd_pool; | |
822 | dmu_buf_t *dbuf; | |
823 | dsl_dataset_phys_t *dsphys; | |
824 | uint64_t dsobj; | |
825 | objset_t *mos = dp->dp_meta_objset; | |
826 | ||
b128c09f BB |
827 | if (origin == NULL) |
828 | origin = dp->dp_origin_snap; | |
829 | ||
34dc7c2f | 830 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 831 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 832 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 833 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
834 | |
835 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
836 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 837 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
838 | dmu_buf_will_dirty(dbuf, tx); |
839 | dsphys = dbuf->db_data; | |
b128c09f | 840 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
841 | dsphys->ds_dir_obj = dd->dd_object; |
842 | dsphys->ds_flags = flags; | |
843 | dsphys->ds_fsid_guid = unique_create(); | |
844 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
845 | sizeof (dsphys->ds_guid)); | |
846 | dsphys->ds_snapnames_zapobj = | |
847 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
848 | DMU_OT_NONE, 0, tx); | |
849 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 850 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 851 | |
428870ff BB |
852 | if (origin == NULL) { |
853 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
854 | } else { | |
13fe0198 | 855 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 856 | |
34dc7c2f BB |
857 | dsphys->ds_prev_snap_obj = origin->ds_object; |
858 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 859 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 860 | dsphys->ds_referenced_bytes = |
d683ddbb | 861 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 862 | dsphys->ds_compressed_bytes = |
d683ddbb | 863 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 864 | dsphys->ds_uncompressed_bytes = |
d683ddbb | 865 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
cc9bb3e5 | 866 | rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 867 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; |
cc9bb3e5 | 868 | rrw_exit(&origin->ds_bp_rwlock, FTAG); |
4b20a6f5 MA |
869 | |
870 | /* | |
871 | * Inherit flags that describe the dataset's contents | |
872 | * (INCONSISTENT) or properties (Case Insensitive). | |
873 | */ | |
d683ddbb | 874 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 875 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 876 | |
1c27024e | 877 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
878 | if (origin->ds_feature_inuse[f]) |
879 | dsl_dataset_activate_feature(dsobj, f, tx); | |
880 | } | |
f1512ee6 | 881 | |
34dc7c2f | 882 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 883 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 884 | |
13fe0198 | 885 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
886 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
887 | FTAG, &ohds)); | |
428870ff BB |
888 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
889 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
890 | dsl_dataset_rele(ohds, FTAG); | |
891 | ||
b128c09f | 892 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
893 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
894 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
895 | zap_create(mos, |
896 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
897 | } | |
13fe0198 | 898 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
899 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
900 | dsobj, tx)); | |
b128c09f BB |
901 | } |
902 | ||
34dc7c2f | 903 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 904 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 905 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 906 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 907 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 908 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
909 | zap_create(mos, |
910 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
911 | } | |
13fe0198 | 912 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
913 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
914 | dsobj, tx)); | |
428870ff | 915 | } |
34dc7c2f BB |
916 | } |
917 | ||
b5256303 TC |
918 | /* handle encryption */ |
919 | dsl_dataset_create_crypt_sync(dsobj, dd, origin, dcp, tx); | |
920 | ||
34dc7c2f BB |
921 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
922 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
923 | ||
924 | dmu_buf_rele(dbuf, FTAG); | |
925 | ||
926 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 927 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
928 | |
929 | return (dsobj); | |
930 | } | |
931 | ||
13fe0198 MA |
932 | static void |
933 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
934 | { | |
935 | objset_t *os; | |
936 | ||
937 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
0efd9791 AG |
938 | if (bcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) { |
939 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
940 | zio_t *zio; | |
941 | ||
942 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
b5256303 | 943 | if (os->os_encrypted) |
1b66810b | 944 | os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE; |
0efd9791 AG |
945 | |
946 | zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
947 | dsl_dataset_sync(ds, zio, tx); | |
948 | VERIFY0(zio_wait(zio)); | |
949 | ||
950 | /* dsl_dataset_sync_done will drop this reference. */ | |
951 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
952 | dsl_dataset_sync_done(ds, tx); | |
953 | } | |
13fe0198 MA |
954 | } |
955 | ||
34dc7c2f BB |
956 | uint64_t |
957 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
b5256303 TC |
958 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, |
959 | dsl_crypto_params_t *dcp, dmu_tx_t *tx) | |
34dc7c2f BB |
960 | { |
961 | dsl_pool_t *dp = pdd->dd_pool; | |
962 | uint64_t dsobj, ddobj; | |
963 | dsl_dir_t *dd; | |
964 | ||
13fe0198 | 965 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
966 | ASSERT(lastname[0] != '@'); |
967 | ||
b128c09f | 968 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 969 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 970 | |
b5256303 | 971 | dsobj = dsl_dataset_create_sync_dd(dd, origin, dcp, |
13fe0198 | 972 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); |
34dc7c2f BB |
973 | |
974 | dsl_deleg_set_create_perms(dd, tx, cr); | |
975 | ||
788eb90c JJ |
976 | /* |
977 | * Since we're creating a new node we know it's a leaf, so we can | |
978 | * initialize the counts if the limit feature is active. | |
979 | */ | |
980 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
981 | uint64_t cnt = 0; | |
982 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
983 | ||
984 | dsl_dir_zapify(dd, tx); | |
985 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
986 | sizeof (cnt), 1, &cnt, tx)); | |
987 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
988 | sizeof (cnt), 1, &cnt, tx)); | |
989 | } | |
990 | ||
13fe0198 | 991 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 992 | |
572e2857 BB |
993 | /* |
994 | * If we are creating a clone, make sure we zero out any stale | |
995 | * data from the origin snapshots zil header. | |
996 | */ | |
13fe0198 | 997 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 998 | dsl_dataset_t *ds; |
572e2857 | 999 | |
13fe0198 MA |
1000 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
1001 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
1002 | dsl_dataset_rele(ds, FTAG); |
1003 | } | |
1004 | ||
34dc7c2f BB |
1005 | return (dsobj); |
1006 | } | |
1007 | ||
34dc7c2f | 1008 | /* |
13fe0198 MA |
1009 | * The unique space in the head dataset can be calculated by subtracting |
1010 | * the space used in the most recent snapshot, that is still being used | |
1011 | * in this file system, from the space currently in use. To figure out | |
1012 | * the space in the most recent snapshot still in use, we need to take | |
1013 | * the total space used in the snapshot and subtract out the space that | |
1014 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 1015 | */ |
13fe0198 MA |
1016 | void |
1017 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 1018 | { |
13fe0198 MA |
1019 | uint64_t mrs_used; |
1020 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 1021 | |
0c66c32d | 1022 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 1023 | |
d683ddbb JG |
1024 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
1025 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
1026 | else |
1027 | mrs_used = 0; | |
45d1cae3 | 1028 | |
13fe0198 | 1029 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 1030 | |
13fe0198 | 1031 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
1032 | dsl_dataset_phys(ds)->ds_unique_bytes = |
1033 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 1034 | |
13fe0198 MA |
1035 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
1036 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 1037 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
1038 | } |
1039 | ||
13fe0198 MA |
1040 | void |
1041 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
1042 | dmu_tx_t *tx) | |
45d1cae3 | 1043 | { |
13fe0198 | 1044 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
13fe0198 | 1045 | ASSERTV(uint64_t count); |
1c27024e | 1046 | int err; |
13fe0198 | 1047 | |
d683ddbb JG |
1048 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
1049 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1050 | obj, tx); | |
13fe0198 MA |
1051 | /* |
1052 | * The err should not be ENOENT, but a bug in a previous version | |
1053 | * of the code could cause upgrade_clones_cb() to not set | |
1054 | * ds_next_snap_obj when it should, leading to a missing entry. | |
1055 | * If we knew that the pool was created after | |
1056 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
1057 | * ENOENT. However, at least we can check that we don't have | |
1058 | * too many entries in the next_clones_obj even after failing to | |
1059 | * remove this one. | |
1060 | */ | |
1061 | if (err != ENOENT) | |
1062 | VERIFY0(err); | |
d683ddbb | 1063 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 1064 | &count)); |
d683ddbb | 1065 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 1066 | } |
45d1cae3 | 1067 | |
45d1cae3 | 1068 | |
13fe0198 MA |
1069 | blkptr_t * |
1070 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1071 | { | |
d683ddbb | 1072 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
1073 | } |
1074 | ||
13fe0198 MA |
1075 | spa_t * |
1076 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1077 | { | |
1078 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
1079 | } |
1080 | ||
13fe0198 MA |
1081 | void |
1082 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 1083 | { |
13fe0198 | 1084 | dsl_pool_t *dp; |
45d1cae3 | 1085 | |
13fe0198 MA |
1086 | if (ds == NULL) /* this is the meta-objset */ |
1087 | return; | |
34dc7c2f | 1088 | |
428870ff | 1089 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1090 | |
d683ddbb | 1091 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1092 | panic("dirtying snapshot!"); |
1093 | ||
0efd9791 AG |
1094 | /* Must not dirty a dataset in the same txg where it got snapshotted. */ |
1095 | ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); | |
34dc7c2f | 1096 | |
0efd9791 | 1097 | dp = ds->ds_dir->dd_pool; |
13fe0198 | 1098 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
34dc7c2f BB |
1099 | /* up the hold count until we can be written out */ |
1100 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1101 | } | |
1102 | } | |
1103 | ||
04434775 MA |
1104 | boolean_t |
1105 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
1106 | { | |
1c27024e | 1107 | for (int t = 0; t < TXG_SIZE; t++) { |
04434775 MA |
1108 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, |
1109 | ds, t)) | |
1110 | return (B_TRUE); | |
1111 | } | |
1112 | return (B_FALSE); | |
1113 | } | |
1114 | ||
34dc7c2f | 1115 | static int |
13fe0198 | 1116 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1117 | { |
13fe0198 | 1118 | uint64_t asize; |
34dc7c2f | 1119 | |
13fe0198 | 1120 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1121 | return (0); |
1122 | ||
34dc7c2f | 1123 | /* |
13fe0198 MA |
1124 | * If there's an fs-only reservation, any blocks that might become |
1125 | * owned by the snapshot dataset must be accommodated by space | |
1126 | * outside of the reservation. | |
34dc7c2f | 1127 | */ |
13fe0198 | 1128 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1129 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1130 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1131 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1132 | |
1133 | /* | |
13fe0198 MA |
1134 | * Propagate any reserved space for this snapshot to other |
1135 | * snapshot checks in this sync group. | |
34dc7c2f | 1136 | */ |
13fe0198 MA |
1137 | if (asize > 0) |
1138 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1139 | |
1140 | return (0); | |
1141 | } | |
1142 | ||
13fe0198 MA |
1143 | typedef struct dsl_dataset_snapshot_arg { |
1144 | nvlist_t *ddsa_snaps; | |
1145 | nvlist_t *ddsa_props; | |
1146 | nvlist_t *ddsa_errors; | |
788eb90c | 1147 | cred_t *ddsa_cr; |
13fe0198 | 1148 | } dsl_dataset_snapshot_arg_t; |
45d1cae3 | 1149 | |
34dc7c2f | 1150 | int |
13fe0198 | 1151 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1152 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1153 | { |
13fe0198 MA |
1154 | int error; |
1155 | uint64_t value; | |
34dc7c2f | 1156 | |
13fe0198 | 1157 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1158 | |
13fe0198 | 1159 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1160 | return (0); |
34dc7c2f BB |
1161 | |
1162 | /* | |
13fe0198 MA |
1163 | * We don't allow multiple snapshots of the same txg. If there |
1164 | * is already one, try again. | |
34dc7c2f | 1165 | */ |
d683ddbb | 1166 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1167 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1168 | |
1169 | /* | |
13fe0198 | 1170 | * Check for conflicting snapshot name. |
34dc7c2f | 1171 | */ |
13fe0198 MA |
1172 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1173 | if (error == 0) | |
2e528b49 | 1174 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1175 | if (error != ENOENT) |
1176 | return (error); | |
45d1cae3 | 1177 | |
96c2e961 KW |
1178 | /* |
1179 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1180 | * those into which we are currently receiving. However, if we are | |
1181 | * creating this snapshot as part of a receive, this check will be | |
1182 | * executed atomically with respect to the completion of the receive | |
1183 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1184 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1185 | * dmu_recv_end_sync(). | |
1186 | */ | |
1187 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1188 | return (SET_ERROR(EBUSY)); | |
1189 | ||
788eb90c JJ |
1190 | /* |
1191 | * Skip the check for temporary snapshots or if we have already checked | |
1192 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1193 | * check the count here when we're receiving a stream. | |
1194 | */ | |
1195 | if (cnt != 0 && cr != NULL) { | |
1196 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1197 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1198 | if (error != 0) | |
1199 | return (error); | |
1200 | } | |
1201 | ||
13fe0198 MA |
1202 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1203 | if (error != 0) | |
1204 | return (error); | |
45d1cae3 | 1205 | |
34dc7c2f BB |
1206 | return (0); |
1207 | } | |
1208 | ||
13fe0198 MA |
1209 | static int |
1210 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
b128c09f | 1211 | { |
13fe0198 MA |
1212 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1213 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1214 | nvpair_t *pair; | |
1215 | int rv = 0; | |
b128c09f | 1216 | |
788eb90c JJ |
1217 | /* |
1218 | * Pre-compute how many total new snapshots will be created for each | |
1219 | * level in the tree and below. This is needed for validating the | |
1220 | * snapshot limit when either taking a recursive snapshot or when | |
1221 | * taking multiple snapshots. | |
1222 | * | |
1223 | * The problem is that the counts are not actually adjusted when | |
1224 | * we are checking, only when we finally sync. For a single snapshot, | |
1225 | * this is easy, the count will increase by 1 at each node up the tree, | |
1226 | * but its more complicated for the recursive/multiple snapshot case. | |
1227 | * | |
1228 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1229 | * at each level up the tree but since it is validating each snapshot | |
1230 | * independently we need to be sure that we are validating the complete | |
1231 | * count for the entire set of snapshots. We do this by rolling up the | |
1232 | * counts for each component of the name into an nvlist and then | |
1233 | * checking each of those cases with the aggregated count. | |
1234 | * | |
1235 | * This approach properly handles not only the recursive snapshot | |
1236 | * case (where we get all of those on the ddsa_snaps list) but also | |
1237 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1238 | * validate the limit on 'a' using a count of 2). | |
1239 | * | |
1240 | * We validate the snapshot names in the third loop and only report | |
1241 | * name errors once. | |
1242 | */ | |
1243 | if (dmu_tx_is_syncing(tx)) { | |
1244 | char *nm; | |
1245 | nvlist_t *cnt_track = NULL; | |
1246 | cnt_track = fnvlist_alloc(); | |
1247 | ||
1248 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1249 | ||
1250 | /* Rollup aggregated counts into the cnt_track list */ | |
1251 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1252 | pair != NULL; | |
1253 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1254 | char *pdelim; | |
1255 | uint64_t val; | |
1256 | ||
1257 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1258 | pdelim = strchr(nm, '@'); | |
1259 | if (pdelim == NULL) | |
1260 | continue; | |
1261 | *pdelim = '\0'; | |
1262 | ||
1263 | do { | |
1264 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1265 | &val) == 0) { | |
1266 | /* update existing entry */ | |
1267 | fnvlist_add_uint64(cnt_track, nm, | |
1268 | val + 1); | |
1269 | } else { | |
1270 | /* add to list */ | |
1271 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1272 | } | |
1273 | ||
1274 | pdelim = strrchr(nm, '/'); | |
1275 | if (pdelim != NULL) | |
1276 | *pdelim = '\0'; | |
1277 | } while (pdelim != NULL); | |
1278 | } | |
1279 | ||
1280 | kmem_free(nm, MAXPATHLEN); | |
1281 | ||
1282 | /* Check aggregated counts at each level */ | |
1283 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1284 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1285 | int error = 0; | |
1286 | char *name; | |
1287 | uint64_t cnt = 0; | |
1288 | dsl_dataset_t *ds; | |
1289 | ||
1290 | name = nvpair_name(pair); | |
1291 | cnt = fnvpair_value_uint64(pair); | |
1292 | ASSERT(cnt > 0); | |
1293 | ||
1294 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1295 | if (error == 0) { | |
1296 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1297 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1298 | ddsa->ddsa_cr); | |
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 | rv = error; | |
1307 | /* only report one error for this check */ | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | nvlist_free(cnt_track); | |
1312 | } | |
1313 | ||
13fe0198 MA |
1314 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1315 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1316 | int error = 0; | |
1317 | dsl_dataset_t *ds; | |
689f093e | 1318 | char *name, *atp = NULL; |
eca7b760 | 1319 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1320 | |
1321 | name = nvpair_name(pair); | |
eca7b760 | 1322 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 1323 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1324 | if (error == 0) { |
1325 | atp = strchr(name, '@'); | |
1326 | if (atp == NULL) | |
2e528b49 | 1327 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1328 | if (error == 0) |
1329 | (void) strlcpy(dsname, name, atp - name + 1); | |
1330 | } | |
1331 | if (error == 0) | |
1332 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1333 | if (error == 0) { | |
788eb90c | 1334 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1335 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1336 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1337 | dsl_dataset_rele(ds, FTAG); |
1338 | } | |
b128c09f | 1339 | |
13fe0198 MA |
1340 | if (error != 0) { |
1341 | if (ddsa->ddsa_errors != NULL) { | |
1342 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1343 | name, error); | |
1344 | } | |
1345 | rv = error; | |
1346 | } | |
1347 | } | |
788eb90c | 1348 | |
13fe0198 | 1349 | return (rv); |
b128c09f BB |
1350 | } |
1351 | ||
13fe0198 MA |
1352 | void |
1353 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1354 | dmu_tx_t *tx) | |
428870ff | 1355 | { |
13fe0198 MA |
1356 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1357 | dmu_buf_t *dbuf; | |
1358 | dsl_dataset_phys_t *dsphys; | |
1359 | uint64_t dsobj, crtxg; | |
1360 | objset_t *mos = dp->dp_meta_objset; | |
1361 | ASSERTV(static zil_header_t zero_zil); | |
1362 | ASSERTV(objset_t *os); | |
1363 | ||
1364 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1365 | |
428870ff | 1366 | /* |
13fe0198 MA |
1367 | * If we are on an old pool, the zil must not be active, in which |
1368 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1369 | */ |
13fe0198 MA |
1370 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1371 | dmu_objset_from_ds(ds, &os) != 0 || | |
1372 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1373 | sizeof (zero_zil)) == 0); | |
428870ff | 1374 | |
0efd9791 AG |
1375 | /* Should not snapshot a dirty dataset. */ |
1376 | ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1377 | ds, tx->tx_txg)); | |
1378 | ||
788eb90c | 1379 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1380 | |
1381 | /* | |
13fe0198 | 1382 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1383 | */ |
1384 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1385 | crtxg = 1; | |
1386 | else | |
1387 | crtxg = tx->tx_txg; | |
1388 | ||
34dc7c2f BB |
1389 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1390 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1391 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1392 | dmu_buf_will_dirty(dbuf, tx); |
1393 | dsphys = dbuf->db_data; | |
b128c09f | 1394 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1395 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1396 | dsphys->ds_fsid_guid = unique_create(); | |
1397 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1398 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1399 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1400 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1401 | dsphys->ds_next_snap_obj = ds->ds_object; |
1402 | dsphys->ds_num_children = 1; | |
1403 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1404 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1405 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1406 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1407 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1408 | dsphys->ds_uncompressed_bytes = | |
1409 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1410 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
cc9bb3e5 | 1411 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 1412 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; |
cc9bb3e5 | 1413 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
1414 | dmu_buf_rele(dbuf, FTAG); |
1415 | ||
1c27024e | 1416 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
1417 | if (ds->ds_feature_inuse[f]) |
1418 | dsl_dataset_activate_feature(dsobj, f, tx); | |
1419 | } | |
f1512ee6 | 1420 | |
d683ddbb JG |
1421 | ASSERT3U(ds->ds_prev != 0, ==, |
1422 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1423 | if (ds->ds_prev) { |
b128c09f | 1424 | uint64_t next_clones_obj = |
d683ddbb JG |
1425 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1426 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1427 | ds->ds_object || |
d683ddbb JG |
1428 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1429 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1430 | ds->ds_object) { | |
34dc7c2f | 1431 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1432 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1433 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1434 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1435 | } else if (next_clones_obj != 0) { |
13fe0198 | 1436 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1437 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1438 | VERIFY0(zap_add_int(mos, |
b128c09f | 1439 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1440 | } |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * If we have a reference-reservation on this dataset, we will | |
1445 | * need to increase the amount of refreservation being charged | |
1446 | * since our unique space is going to zero. | |
1447 | */ | |
1448 | if (ds->ds_reserved) { | |
428870ff BB |
1449 | int64_t delta; |
1450 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1451 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1452 | ds->ds_reserved); | |
b128c09f | 1453 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1454 | delta, 0, 0, tx); |
34dc7c2f BB |
1455 | } |
1456 | ||
34dc7c2f | 1457 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1458 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1459 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1460 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1461 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1462 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1463 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1464 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1465 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1466 | |
d683ddbb JG |
1467 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1468 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1469 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1470 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
34dc7c2f | 1471 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1472 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1473 | |
d683ddbb | 1474 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1475 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1476 | |
1477 | if (ds->ds_prev) | |
13fe0198 MA |
1478 | dsl_dataset_rele(ds->ds_prev, ds); |
1479 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1480 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1481 | |
428870ff BB |
1482 | dsl_scan_ds_snapshotted(ds, tx); |
1483 | ||
1484 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1485 | |
6f1ffb06 | 1486 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1487 | } |
1488 | ||
13fe0198 MA |
1489 | static void |
1490 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1491 | { |
13fe0198 MA |
1492 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1493 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1494 | nvpair_t *pair; | |
34dc7c2f | 1495 | |
13fe0198 MA |
1496 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1497 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1498 | dsl_dataset_t *ds; | |
1499 | char *name, *atp; | |
eca7b760 | 1500 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1501 | |
1502 | name = nvpair_name(pair); | |
1503 | atp = strchr(name, '@'); | |
1504 | (void) strlcpy(dsname, name, atp - name + 1); | |
1505 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1506 | ||
1507 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1508 | if (ddsa->ddsa_props != NULL) { | |
1509 | dsl_props_set_sync_impl(ds->ds_prev, | |
1510 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1511 | } | |
a0bd735a | 1512 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
1513 | dsl_dataset_rele(ds, FTAG); |
1514 | } | |
34dc7c2f BB |
1515 | } |
1516 | ||
13fe0198 MA |
1517 | /* |
1518 | * The snapshots must all be in the same pool. | |
1519 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1520 | */ | |
1521 | int | |
1522 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1523 | { |
13fe0198 MA |
1524 | dsl_dataset_snapshot_arg_t ddsa; |
1525 | nvpair_t *pair; | |
1526 | boolean_t needsuspend; | |
1527 | int error; | |
1528 | spa_t *spa; | |
1529 | char *firstname; | |
1530 | nvlist_t *suspended = NULL; | |
330d06f9 | 1531 | |
13fe0198 MA |
1532 | pair = nvlist_next_nvpair(snaps, NULL); |
1533 | if (pair == NULL) | |
1534 | return (0); | |
1535 | firstname = nvpair_name(pair); | |
1536 | ||
1537 | error = spa_open(firstname, &spa, FTAG); | |
1538 | if (error != 0) | |
1539 | return (error); | |
1540 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1541 | spa_close(spa, FTAG); | |
1542 | ||
1543 | if (needsuspend) { | |
1544 | suspended = fnvlist_alloc(); | |
1545 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1546 | pair = nvlist_next_nvpair(snaps, pair)) { | |
eca7b760 | 1547 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1548 | char *snapname = nvpair_name(pair); |
1549 | char *atp; | |
1550 | void *cookie; | |
1551 | ||
1552 | atp = strchr(snapname, '@'); | |
1553 | if (atp == NULL) { | |
2e528b49 | 1554 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1555 | break; |
1556 | } | |
1557 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1558 | ||
1559 | error = zil_suspend(fsname, &cookie); | |
1560 | if (error != 0) | |
1561 | break; | |
1562 | fnvlist_add_uint64(suspended, fsname, | |
1563 | (uintptr_t)cookie); | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | ddsa.ddsa_snaps = snaps; | |
1568 | ddsa.ddsa_props = props; | |
1569 | ddsa.ddsa_errors = errors; | |
788eb90c | 1570 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1571 | |
1572 | if (error == 0) { | |
1573 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1574 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1575 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1576 | } |
1577 | ||
1578 | if (suspended != NULL) { | |
1579 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1580 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1581 | zil_resume((void *)(uintptr_t) | |
1582 | fnvpair_value_uint64(pair)); | |
1583 | } | |
1584 | fnvlist_free(suspended); | |
1585 | } | |
1586 | ||
1587 | return (error); | |
1588 | } | |
1589 | ||
1590 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1591 | const char *ddsta_fsname; | |
1592 | const char *ddsta_snapname; | |
1593 | minor_t ddsta_cleanup_minor; | |
1594 | const char *ddsta_htag; | |
1595 | } dsl_dataset_snapshot_tmp_arg_t; | |
1596 | ||
1597 | static int | |
1598 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1599 | { | |
1600 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1601 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1602 | dsl_dataset_t *ds; | |
1603 | int error; | |
1604 | ||
1605 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1606 | if (error != 0) | |
1607 | return (error); | |
1608 | ||
788eb90c | 1609 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1610 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1611 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1612 | if (error != 0) { |
1613 | dsl_dataset_rele(ds, FTAG); | |
1614 | return (error); | |
1615 | } | |
1616 | ||
1617 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1618 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1619 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1620 | } |
1621 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1622 | B_TRUE, tx); | |
1623 | if (error != 0) { | |
1624 | dsl_dataset_rele(ds, FTAG); | |
1625 | return (error); | |
1626 | } | |
1627 | ||
1628 | dsl_dataset_rele(ds, FTAG); | |
1629 | return (0); | |
1630 | } | |
1631 | ||
1632 | static void | |
1633 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1634 | { | |
1635 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1636 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 1637 | dsl_dataset_t *ds = NULL; |
13fe0198 MA |
1638 | |
1639 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1640 | ||
1641 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1642 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1643 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1644 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1645 | ||
1646 | dsl_dataset_rele(ds, FTAG); | |
1647 | } | |
1648 | ||
1649 | int | |
1650 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1651 | minor_t cleanup_minor, const char *htag) | |
1652 | { | |
1653 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1654 | int error; | |
1655 | spa_t *spa; | |
1656 | boolean_t needsuspend; | |
1657 | void *cookie; | |
1658 | ||
1659 | ddsta.ddsta_fsname = fsname; | |
1660 | ddsta.ddsta_snapname = snapname; | |
1661 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1662 | ddsta.ddsta_htag = htag; | |
1663 | ||
1664 | error = spa_open(fsname, &spa, FTAG); | |
1665 | if (error != 0) | |
1666 | return (error); | |
1667 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1668 | spa_close(spa, FTAG); | |
1669 | ||
1670 | if (needsuspend) { | |
1671 | error = zil_suspend(fsname, &cookie); | |
1672 | if (error != 0) | |
1673 | return (error); | |
1674 | } | |
1675 | ||
1676 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1677 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1678 | |
1679 | if (needsuspend) | |
1680 | zil_resume(cookie); | |
1681 | return (error); | |
1682 | } | |
1683 | ||
1684 | ||
1685 | void | |
1686 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1687 | { | |
1688 | ASSERT(dmu_tx_is_syncing(tx)); | |
1689 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1690 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1691 | |
1692 | /* | |
1693 | * in case we had to change ds_fsid_guid when we opened it, | |
1694 | * sync it out now. | |
1695 | */ | |
1696 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1697 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 | 1698 | |
47dfff3b MA |
1699 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
1700 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1701 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
1702 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
1703 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1704 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
1705 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
1706 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1707 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
1708 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
1709 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
1710 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
1711 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
1712 | } | |
1713 | ||
13fe0198 | 1714 | dmu_objset_sync(ds->ds_objset, zio, tx); |
f1512ee6 | 1715 | |
1c27024e | 1716 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
1717 | if (ds->ds_feature_activation_needed[f]) { |
1718 | if (ds->ds_feature_inuse[f]) | |
1719 | continue; | |
1720 | dsl_dataset_activate_feature(ds->ds_object, f, tx); | |
1721 | ds->ds_feature_inuse[f] = B_TRUE; | |
1722 | } | |
f1512ee6 | 1723 | } |
13fe0198 MA |
1724 | } |
1725 | ||
0efd9791 AG |
1726 | static int |
1727 | deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) | |
1728 | { | |
1729 | dsl_deadlist_t *dl = arg; | |
1730 | dsl_deadlist_insert(dl, bp, tx); | |
1731 | return (0); | |
1732 | } | |
1733 | ||
1734 | void | |
1735 | dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1736 | { | |
64fc7762 | 1737 | objset_t *os = ds->ds_objset; |
0efd9791 AG |
1738 | |
1739 | bplist_iterate(&ds->ds_pending_deadlist, | |
1740 | deadlist_enqueue_cb, &ds->ds_deadlist, tx); | |
1741 | ||
64fc7762 MA |
1742 | if (os->os_synced_dnodes != NULL) { |
1743 | multilist_destroy(os->os_synced_dnodes); | |
1744 | os->os_synced_dnodes = NULL; | |
1745 | } | |
1746 | ||
0efd9791 AG |
1747 | ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx))); |
1748 | ||
1749 | dmu_buf_rele(ds->ds_dbuf, ds); | |
1750 | } | |
1751 | ||
13fe0198 MA |
1752 | static void |
1753 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1754 | { | |
1755 | uint64_t count = 0; | |
1756 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1757 | zap_cursor_t zc; | |
1758 | zap_attribute_t za; | |
1759 | nvlist_t *propval = fnvlist_alloc(); | |
e2fcb562 | 1760 | nvlist_t *val; |
13fe0198 MA |
1761 | |
1762 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 | 1763 | |
e2fcb562 BB |
1764 | /* |
1765 | * We use nvlist_alloc() instead of fnvlist_alloc() because the | |
1766 | * latter would allocate the list with NV_UNIQUE_NAME flag. | |
1767 | * As a result, every time a clone name is appended to the list | |
1768 | * it would be (linearly) searched for for a duplicate name. | |
1769 | * We already know that all clone names must be unique and we | |
1770 | * want avoid the quadratic complexity of double-checking that | |
1771 | * because we can have a large number of clones. | |
1772 | */ | |
1773 | VERIFY0(nvlist_alloc(&val, 0, KM_SLEEP)); | |
1774 | ||
330d06f9 | 1775 | /* |
13fe0198 | 1776 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
1777 | * due to a bug in a previous version of the code. |
1778 | * Only trust it if it has the right number of entries. | |
1779 | */ | |
d683ddbb JG |
1780 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
1781 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
1782 | &count)); |
1783 | } | |
d683ddbb | 1784 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) |
330d06f9 | 1785 | goto fail; |
d683ddbb JG |
1786 | for (zap_cursor_init(&zc, mos, |
1787 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
1788 | zap_cursor_retrieve(&zc, &za) == 0; |
1789 | zap_cursor_advance(&zc)) { | |
1790 | dsl_dataset_t *clone; | |
eca7b760 | 1791 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1792 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1793 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 1794 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 1795 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
1796 | dsl_dataset_rele(clone, FTAG); |
1797 | } | |
1798 | zap_cursor_fini(&zc); | |
13fe0198 MA |
1799 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); |
1800 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
330d06f9 MA |
1801 | fail: |
1802 | nvlist_free(val); | |
1803 | nvlist_free(propval); | |
330d06f9 MA |
1804 | } |
1805 | ||
47dfff3b MA |
1806 | static void |
1807 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1808 | { | |
1809 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1810 | ||
1811 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
1812 | char *str; | |
1813 | void *packed; | |
1814 | uint8_t *compressed; | |
1815 | uint64_t val; | |
1816 | nvlist_t *token_nv = fnvlist_alloc(); | |
1817 | size_t packed_size, compressed_size; | |
47dfff3b MA |
1818 | |
1819 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1820 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
1821 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
1822 | } | |
1823 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1824 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
1825 | fnvlist_add_uint64(token_nv, "object", val); | |
1826 | } | |
1827 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1828 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
1829 | fnvlist_add_uint64(token_nv, "offset", val); | |
1830 | } | |
1831 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1832 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
1833 | fnvlist_add_uint64(token_nv, "bytes", val); | |
1834 | } | |
1835 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1836 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
1837 | fnvlist_add_uint64(token_nv, "toguid", val); | |
1838 | } | |
1c27024e | 1839 | char buf[MAXNAMELEN]; |
47dfff3b MA |
1840 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, |
1841 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
1842 | fnvlist_add_string(token_nv, "toname", buf); | |
1843 | } | |
2aa34383 DK |
1844 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1845 | DS_FIELD_RESUME_LARGEBLOCK) == 0) { | |
1846 | fnvlist_add_boolean(token_nv, "largeblockok"); | |
1847 | } | |
47dfff3b MA |
1848 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1849 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
1850 | fnvlist_add_boolean(token_nv, "embedok"); | |
1851 | } | |
2aa34383 DK |
1852 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1853 | DS_FIELD_RESUME_COMPRESSOK) == 0) { | |
1854 | fnvlist_add_boolean(token_nv, "compressok"); | |
1855 | } | |
b5256303 TC |
1856 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1857 | DS_FIELD_RESUME_RAWOK) == 0) { | |
1858 | fnvlist_add_boolean(token_nv, "rawok"); | |
1859 | } | |
47dfff3b MA |
1860 | packed = fnvlist_pack(token_nv, &packed_size); |
1861 | fnvlist_free(token_nv); | |
1862 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
1863 | ||
1864 | compressed_size = gzip_compress(packed, compressed, | |
1865 | packed_size, packed_size, 6); | |
1866 | ||
1c27024e | 1867 | zio_cksum_t cksum; |
fc897b24 | 1868 | fletcher_4_native_varsize(compressed, compressed_size, &cksum); |
47dfff3b MA |
1869 | |
1870 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1c27024e | 1871 | for (int i = 0; i < compressed_size; i++) { |
47dfff3b MA |
1872 | (void) sprintf(str + i * 2, "%02x", compressed[i]); |
1873 | } | |
1874 | str[compressed_size * 2] = '\0'; | |
1c27024e | 1875 | char *propval = kmem_asprintf("%u-%llx-%llx-%s", |
47dfff3b MA |
1876 | ZFS_SEND_RESUME_TOKEN_VERSION, |
1877 | (longlong_t)cksum.zc_word[0], | |
1878 | (longlong_t)packed_size, str); | |
1879 | dsl_prop_nvlist_add_string(nv, | |
1880 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
1881 | kmem_free(packed, packed_size); | |
1882 | kmem_free(str, compressed_size * 2 + 1); | |
1883 | kmem_free(compressed, packed_size); | |
1884 | strfree(propval); | |
1885 | } | |
1886 | } | |
1887 | ||
34dc7c2f BB |
1888 | void |
1889 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1890 | { | |
b5256303 | 1891 | int err; |
b858767a | 1892 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
f5fc4aca | 1893 | uint64_t refd, avail, uobjs, aobjs, ratio; |
13fe0198 MA |
1894 | |
1895 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 1896 | |
d683ddbb JG |
1897 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : |
1898 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1899 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
6f1ffb06 MA |
1900 | |
1901 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
24a64651 | 1902 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d683ddbb | 1903 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); |
6f1ffb06 | 1904 | |
0c66c32d | 1905 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
1906 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); |
1907 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
d683ddbb | 1908 | dsl_dataset_phys(ds)->ds_unique_bytes); |
6f1ffb06 MA |
1909 | get_clones_stat(ds, nv); |
1910 | } else { | |
1715493f | 1911 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { |
eca7b760 | 1912 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
1715493f MA |
1913 | dsl_dataset_name(ds->ds_prev, buf); |
1914 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); | |
1915 | } | |
1916 | ||
6f1ffb06 MA |
1917 | dsl_dir_stats(ds->ds_dir, nv); |
1918 | } | |
34dc7c2f BB |
1919 | |
1920 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1921 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1922 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1923 | ||
1924 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
d683ddbb | 1925 | dsl_dataset_phys(ds)->ds_creation_time); |
34dc7c2f | 1926 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d683ddbb | 1927 | dsl_dataset_phys(ds)->ds_creation_txg); |
34dc7c2f BB |
1928 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
1929 | ds->ds_quota); | |
1930 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1931 | ds->ds_reserved); | |
b128c09f | 1932 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d683ddbb | 1933 | dsl_dataset_phys(ds)->ds_guid); |
428870ff | 1934 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d683ddbb | 1935 | dsl_dataset_phys(ds)->ds_unique_bytes); |
428870ff BB |
1936 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
1937 | ds->ds_object); | |
1938 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1939 | ds->ds_userrefs); | |
45d1cae3 BB |
1940 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
1941 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
b5256303 | 1942 | dsl_dataset_crypt_stats(ds, nv); |
34dc7c2f | 1943 | |
d683ddbb | 1944 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
330d06f9 MA |
1945 | uint64_t written, comp, uncomp; |
1946 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1947 | dsl_dataset_t *prev; | |
330d06f9 | 1948 | |
330d06f9 | 1949 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 1950 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); |
330d06f9 MA |
1951 | if (err == 0) { |
1952 | err = dsl_dataset_space_written(prev, ds, &written, | |
1953 | &comp, &uncomp); | |
1954 | dsl_dataset_rele(prev, FTAG); | |
1955 | if (err == 0) { | |
1956 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1957 | written); | |
1958 | } | |
1959 | } | |
1960 | } | |
1961 | ||
47dfff3b | 1962 | if (!dsl_dataset_is_snapshot(ds)) { |
47dfff3b MA |
1963 | /* |
1964 | * A failed "newfs" (e.g. full) resumable receive leaves | |
1965 | * the stats set on this dataset. Check here for the prop. | |
1966 | */ | |
1967 | get_receive_resume_stats(ds, nv); | |
1968 | ||
1969 | /* | |
1970 | * A failed incremental resumable receive leaves the | |
1971 | * stats set on our child named "%recv". Check the child | |
1972 | * for the prop. | |
1973 | */ | |
1c27024e DB |
1974 | /* 6 extra bytes for /%recv */ |
1975 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
1976 | dsl_dataset_t *recv_ds; | |
47dfff3b | 1977 | dsl_dataset_name(ds, recvname); |
eca7b760 IK |
1978 | if (strlcat(recvname, "/", sizeof (recvname)) < |
1979 | sizeof (recvname) && | |
1980 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
1981 | sizeof (recvname) && | |
1982 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
47dfff3b MA |
1983 | get_receive_resume_stats(recv_ds, nv); |
1984 | dsl_dataset_rele(recv_ds, FTAG); | |
1985 | } | |
1986 | } | |
34dc7c2f BB |
1987 | } |
1988 | ||
1989 | void | |
1990 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1991 | { | |
13fe0198 MA |
1992 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1993 | ASSERT(dsl_pool_config_held(dp)); | |
1994 | ||
d683ddbb JG |
1995 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; |
1996 | stat->dds_inconsistent = | |
1997 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1998 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
6f1ffb06 | 1999 | stat->dds_origin[0] = '\0'; |
0c66c32d | 2000 | if (ds->ds_is_snapshot) { |
34dc7c2f | 2001 | stat->dds_is_snapshot = B_TRUE; |
d683ddbb JG |
2002 | stat->dds_num_clones = |
2003 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
fb5f0bc8 BB |
2004 | } else { |
2005 | stat->dds_is_snapshot = B_FALSE; | |
2006 | stat->dds_num_clones = 0; | |
34dc7c2f | 2007 | |
6f1ffb06 MA |
2008 | if (dsl_dir_is_clone(ds->ds_dir)) { |
2009 | dsl_dataset_t *ods; | |
34dc7c2f | 2010 | |
13fe0198 | 2011 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
2012 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, |
2013 | FTAG, &ods)); | |
6f1ffb06 | 2014 | dsl_dataset_name(ods, stat->dds_origin); |
13fe0198 | 2015 | dsl_dataset_rele(ods, FTAG); |
6f1ffb06 | 2016 | } |
34dc7c2f | 2017 | } |
34dc7c2f BB |
2018 | } |
2019 | ||
2020 | uint64_t | |
2021 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
2022 | { | |
2023 | return (ds->ds_fsid_guid); | |
2024 | } | |
2025 | ||
2026 | void | |
2027 | dsl_dataset_space(dsl_dataset_t *ds, | |
2028 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
2029 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
2030 | { | |
d683ddbb | 2031 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 2032 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
2033 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
2034 | *availbytesp += | |
2035 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
2036 | if (ds->ds_quota != 0) { |
2037 | /* | |
2038 | * Adjust available bytes according to refquota | |
2039 | */ | |
2040 | if (*refdbytesp < ds->ds_quota) | |
2041 | *availbytesp = MIN(*availbytesp, | |
2042 | ds->ds_quota - *refdbytesp); | |
2043 | else | |
2044 | *availbytesp = 0; | |
2045 | } | |
cc9bb3e5 | 2046 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 2047 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
cc9bb3e5 | 2048 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
2049 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
2050 | } | |
2051 | ||
2052 | boolean_t | |
19580676 | 2053 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 2054 | { |
cc9bb3e5 GM |
2055 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
2056 | uint64_t birth; | |
2057 | ||
2058 | ASSERT(dsl_pool_config_held(dp)); | |
19580676 | 2059 | if (snap == NULL) |
34dc7c2f | 2060 | return (B_FALSE); |
cc9bb3e5 GM |
2061 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
2062 | birth = dsl_dataset_get_blkptr(ds)->blk_birth; | |
2063 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
2064 | if (birth > dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 2065 | objset_t *os, *os_snap; |
572e2857 BB |
2066 | /* |
2067 | * It may be that only the ZIL differs, because it was | |
2068 | * reset in the head. Don't count that as being | |
2069 | * modified. | |
2070 | */ | |
2071 | if (dmu_objset_from_ds(ds, &os) != 0) | |
2072 | return (B_TRUE); | |
19580676 | 2073 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
2074 | return (B_TRUE); |
2075 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 2076 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
2077 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
2078 | } | |
34dc7c2f BB |
2079 | return (B_FALSE); |
2080 | } | |
2081 | ||
13fe0198 MA |
2082 | typedef struct dsl_dataset_rename_snapshot_arg { |
2083 | const char *ddrsa_fsname; | |
2084 | const char *ddrsa_oldsnapname; | |
2085 | const char *ddrsa_newsnapname; | |
2086 | boolean_t ddrsa_recursive; | |
2087 | dmu_tx_t *ddrsa_tx; | |
2088 | } dsl_dataset_rename_snapshot_arg_t; | |
2089 | ||
34dc7c2f BB |
2090 | /* ARGSUSED */ |
2091 | static int | |
13fe0198 MA |
2092 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
2093 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2094 | { |
13fe0198 MA |
2095 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2096 | int error; | |
34dc7c2f | 2097 | uint64_t val; |
34dc7c2f | 2098 | |
13fe0198 MA |
2099 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2100 | if (error != 0) { | |
2101 | /* ignore nonexistent snapshots */ | |
2102 | return (error == ENOENT ? 0 : error); | |
2103 | } | |
34dc7c2f | 2104 | |
13fe0198 MA |
2105 | /* new name should not exist */ |
2106 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2107 | if (error == 0) | |
2e528b49 | 2108 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
2109 | else if (error == ENOENT) |
2110 | error = 0; | |
34dc7c2f BB |
2111 | |
2112 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 | 2113 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
eca7b760 | 2114 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 2115 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 2116 | |
13fe0198 | 2117 | return (error); |
34dc7c2f BB |
2118 | } |
2119 | ||
13fe0198 MA |
2120 | static int |
2121 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2122 | { |
13fe0198 MA |
2123 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2124 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 2125 | dsl_dataset_t *hds; |
13fe0198 | 2126 | int error; |
34dc7c2f | 2127 | |
13fe0198 MA |
2128 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
2129 | if (error != 0) | |
2130 | return (error); | |
34dc7c2f | 2131 | |
13fe0198 MA |
2132 | if (ddrsa->ddrsa_recursive) { |
2133 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2134 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2135 | DS_FIND_CHILDREN); | |
2136 | } else { | |
2137 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2138 | } | |
b128c09f | 2139 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 2140 | return (error); |
34dc7c2f BB |
2141 | } |
2142 | ||
34dc7c2f | 2143 | static int |
13fe0198 MA |
2144 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
2145 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2146 | { |
13fe0198 MA |
2147 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2148 | dsl_dataset_t *ds; | |
2149 | uint64_t val; | |
2150 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2151 | int error; | |
34dc7c2f | 2152 | |
13fe0198 MA |
2153 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2154 | ASSERT(error == 0 || error == ENOENT); | |
2155 | if (error == ENOENT) { | |
2156 | /* ignore nonexistent snapshots */ | |
2157 | return (0); | |
34dc7c2f BB |
2158 | } |
2159 | ||
13fe0198 MA |
2160 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
2161 | ||
2162 | /* log before we change the name */ | |
2163 | spa_history_log_internal_ds(ds, "rename", tx, | |
2164 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 2165 | |
788eb90c JJ |
2166 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
2167 | B_FALSE)); | |
13fe0198 | 2168 | mutex_enter(&ds->ds_lock); |
c9d61adb | 2169 | (void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname, |
2170 | sizeof (ds->ds_snapname)); | |
13fe0198 | 2171 | mutex_exit(&ds->ds_lock); |
d683ddbb JG |
2172 | VERIFY0(zap_add(dp->dp_meta_objset, |
2173 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 2174 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
a0bd735a BP |
2175 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, |
2176 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
34dc7c2f | 2177 | |
13fe0198 | 2178 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
2179 | return (0); |
2180 | } | |
2181 | ||
13fe0198 MA |
2182 | static void |
2183 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2184 | { |
13fe0198 MA |
2185 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2186 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 2187 | dsl_dataset_t *hds = NULL; |
34dc7c2f | 2188 | |
13fe0198 MA |
2189 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
2190 | ddrsa->ddrsa_tx = tx; | |
2191 | if (ddrsa->ddrsa_recursive) { | |
2192 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2193 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
2194 | DS_FIND_CHILDREN)); | |
2195 | } else { | |
2196 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 2197 | } |
13fe0198 | 2198 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
2199 | } |
2200 | ||
13fe0198 MA |
2201 | int |
2202 | dsl_dataset_rename_snapshot(const char *fsname, | |
2203 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 2204 | { |
13fe0198 | 2205 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 2206 | |
13fe0198 MA |
2207 | ddrsa.ddrsa_fsname = fsname; |
2208 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
2209 | ddrsa.ddrsa_newsnapname = newsnapname; | |
2210 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 2211 | |
a0bd735a | 2212 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 | 2213 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
a0bd735a | 2214 | 1, ZFS_SPACE_CHECK_RESERVED)); |
34dc7c2f BB |
2215 | } |
2216 | ||
831baf06 KW |
2217 | /* |
2218 | * If we're doing an ownership handoff, we need to make sure that there is | |
2219 | * only one long hold on the dataset. We're not allowed to change anything here | |
2220 | * so we don't permanently release the long hold or regular hold here. We want | |
2221 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
040dab99 | 2222 | * when we release the long hold. |
831baf06 KW |
2223 | */ |
2224 | static int | |
2225 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
2226 | { | |
2227 | boolean_t held; | |
2228 | ||
2229 | if (!dmu_tx_is_syncing(tx)) | |
2230 | return (0); | |
2231 | ||
2232 | if (owner != NULL) { | |
2233 | VERIFY3P(ds->ds_owner, ==, owner); | |
2234 | dsl_dataset_long_rele(ds, owner); | |
2235 | } | |
2236 | ||
040dab99 | 2237 | held = dsl_dataset_long_held(ds); |
831baf06 KW |
2238 | |
2239 | if (owner != NULL) | |
2240 | dsl_dataset_long_hold(ds, owner); | |
2241 | ||
2242 | if (held) | |
2243 | return (SET_ERROR(EBUSY)); | |
2244 | ||
2245 | return (0); | |
2246 | } | |
2247 | ||
2248 | typedef struct dsl_dataset_rollback_arg { | |
2249 | const char *ddra_fsname; | |
8ca78ab0 | 2250 | const char *ddra_tosnap; |
831baf06 | 2251 | void *ddra_owner; |
46ba1e59 | 2252 | nvlist_t *ddra_result; |
831baf06 KW |
2253 | } dsl_dataset_rollback_arg_t; |
2254 | ||
13fe0198 MA |
2255 | static int |
2256 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2257 | { |
831baf06 | 2258 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 2259 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 2260 | dsl_dataset_t *ds; |
13fe0198 MA |
2261 | int64_t unused_refres_delta; |
2262 | int error; | |
34dc7c2f | 2263 | |
831baf06 | 2264 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
2265 | if (error != 0) |
2266 | return (error); | |
428870ff | 2267 | |
13fe0198 | 2268 | /* must not be a snapshot */ |
0c66c32d | 2269 | if (ds->ds_is_snapshot) { |
13fe0198 | 2270 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2271 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2272 | } |
34dc7c2f | 2273 | |
13fe0198 | 2274 | /* must have a most recent snapshot */ |
d683ddbb | 2275 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 2276 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2277 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2278 | } |
34dc7c2f | 2279 | |
0efd9791 AG |
2280 | /* |
2281 | * No rollback to a snapshot created in the current txg, because | |
2282 | * the rollback may dirty the dataset and create blocks that are | |
2283 | * not reachable from the rootbp while having a birth txg that | |
2284 | * falls into the snapshot's range. | |
2285 | */ | |
2286 | if (dmu_tx_is_syncing(tx) && | |
2287 | dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) { | |
2288 | dsl_dataset_rele(ds, FTAG); | |
2289 | return (SET_ERROR(EAGAIN)); | |
2290 | } | |
2291 | ||
8ca78ab0 AG |
2292 | /* |
2293 | * If the expected target snapshot is specified, then check that | |
2294 | * the latest snapshot is it. | |
2295 | */ | |
2296 | if (ddra->ddra_tosnap != NULL) { | |
2297 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; | |
2298 | ||
2299 | dsl_dataset_name(ds->ds_prev, namebuf); | |
2300 | if (strcmp(namebuf, ddra->ddra_tosnap) != 0) | |
2301 | return (SET_ERROR(EXDEV)); | |
2302 | } | |
2303 | ||
da536844 | 2304 | /* must not have any bookmarks after the most recent snapshot */ |
1c27024e | 2305 | nvlist_t *proprequest = fnvlist_alloc(); |
da536844 | 2306 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
1c27024e | 2307 | nvlist_t *bookmarks = fnvlist_alloc(); |
da536844 MA |
2308 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
2309 | fnvlist_free(proprequest); | |
2310 | if (error != 0) | |
2311 | return (error); | |
1c27024e | 2312 | for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); |
da536844 MA |
2313 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { |
2314 | nvlist_t *valuenv = | |
2315 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2316 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2317 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2318 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2319 | fnvlist_free(bookmarks); |
2320 | dsl_dataset_rele(ds, FTAG); | |
2321 | return (SET_ERROR(EEXIST)); | |
2322 | } | |
2323 | } | |
2324 | fnvlist_free(bookmarks); | |
2325 | ||
831baf06 KW |
2326 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2327 | if (error != 0) { | |
13fe0198 | 2328 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2329 | return (error); |
34dc7c2f | 2330 | } |
428870ff | 2331 | |
13fe0198 MA |
2332 | /* |
2333 | * Check if the snap we are rolling back to uses more than | |
2334 | * the refquota. | |
2335 | */ | |
2336 | if (ds->ds_quota != 0 && | |
d683ddbb | 2337 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2338 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2339 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2340 | } |
2341 | ||
13fe0198 MA |
2342 | /* |
2343 | * When we do the clone swap, we will temporarily use more space | |
2344 | * due to the refreservation (the head will no longer have any | |
2345 | * unique space, so the entire amount of the refreservation will need | |
2346 | * to be free). We will immediately destroy the clone, freeing | |
2347 | * this space, but the freeing happens over many txg's. | |
2348 | */ | |
2349 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2350 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2351 | |
13fe0198 MA |
2352 | if (unused_refres_delta > 0 && |
2353 | unused_refres_delta > | |
2354 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2355 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2356 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2357 | } |
34dc7c2f | 2358 | |
13fe0198 MA |
2359 | dsl_dataset_rele(ds, FTAG); |
2360 | return (0); | |
2361 | } | |
34dc7c2f | 2362 | |
13fe0198 MA |
2363 | static void |
2364 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2365 | { | |
831baf06 | 2366 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2367 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2368 | dsl_dataset_t *ds, *clone; | |
2369 | uint64_t cloneobj; | |
eca7b760 | 2370 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 2371 | |
831baf06 | 2372 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2373 | |
46ba1e59 MA |
2374 | dsl_dataset_name(ds->ds_prev, namebuf); |
2375 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2376 | ||
13fe0198 | 2377 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
b5256303 | 2378 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, NULL, tx); |
13fe0198 MA |
2379 | |
2380 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2381 | ||
2382 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2383 | dsl_dataset_zero_zil(ds, tx); | |
2384 | ||
2385 | dsl_destroy_head_sync_impl(clone, tx); | |
2386 | ||
2387 | dsl_dataset_rele(clone, FTAG); | |
2388 | dsl_dataset_rele(ds, FTAG); | |
2389 | } | |
2390 | ||
831baf06 | 2391 | /* |
46ba1e59 MA |
2392 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2393 | * The name of the most recent snapshot will be returned under key "target" | |
2394 | * in the result nvlist. | |
831baf06 | 2395 | * |
46ba1e59 | 2396 | * If owner != NULL: |
831baf06 KW |
2397 | * - The existing dataset MUST be owned by the specified owner at entry |
2398 | * - Upon return, dataset will still be held by the same owner, whether we | |
2399 | * succeed or not. | |
2400 | * | |
2401 | * This mode is required any time the existing filesystem is mounted. See | |
2402 | * notes above zfs_suspend_fs() for further details. | |
2403 | */ | |
13fe0198 | 2404 | int |
8ca78ab0 AG |
2405 | dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, |
2406 | nvlist_t *result) | |
13fe0198 | 2407 | { |
831baf06 KW |
2408 | dsl_dataset_rollback_arg_t ddra; |
2409 | ||
2410 | ddra.ddra_fsname = fsname; | |
8ca78ab0 | 2411 | ddra.ddra_tosnap = tosnap; |
831baf06 | 2412 | ddra.ddra_owner = owner; |
46ba1e59 | 2413 | ddra.ddra_result = result; |
831baf06 | 2414 | |
13fe0198 | 2415 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
2416 | dsl_dataset_rollback_sync, &ddra, |
2417 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2418 | } |
2419 | ||
b128c09f BB |
2420 | struct promotenode { |
2421 | list_node_t link; | |
2422 | dsl_dataset_t *ds; | |
2423 | }; | |
2424 | ||
13fe0198 MA |
2425 | typedef struct dsl_dataset_promote_arg { |
2426 | const char *ddpa_clonename; | |
2427 | dsl_dataset_t *ddpa_clone; | |
b128c09f | 2428 | list_t shared_snaps, origin_snaps, clone_snaps; |
13fe0198 | 2429 | dsl_dataset_t *origin_origin; /* origin of the origin */ |
b128c09f | 2430 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; |
428870ff | 2431 | char *err_ds; |
788eb90c | 2432 | cred_t *cr; |
13fe0198 | 2433 | } dsl_dataset_promote_arg_t; |
34dc7c2f | 2434 | |
b128c09f | 2435 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
2436 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
2437 | void *tag); | |
2438 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 2439 | |
34dc7c2f | 2440 | static int |
13fe0198 | 2441 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2442 | { |
13fe0198 MA |
2443 | dsl_dataset_promote_arg_t *ddpa = arg; |
2444 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2445 | dsl_dataset_t *hds; | |
2446 | struct promotenode *snap; | |
2447 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 2448 | int err; |
428870ff | 2449 | uint64_t unused; |
788eb90c | 2450 | uint64_t ss_mv_cnt; |
fec41709 | 2451 | size_t max_snap_len; |
34dc7c2f | 2452 | |
13fe0198 MA |
2453 | err = promote_hold(ddpa, dp, FTAG); |
2454 | if (err != 0) | |
2455 | return (err); | |
34dc7c2f | 2456 | |
13fe0198 | 2457 | hds = ddpa->ddpa_clone; |
fec41709 | 2458 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 2459 | |
d683ddbb | 2460 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 2461 | promote_rele(ddpa, FTAG); |
2e528b49 | 2462 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
2463 | } |
2464 | ||
b5256303 TC |
2465 | snap = list_head(&ddpa->shared_snaps); |
2466 | if (snap == NULL) { | |
2467 | err = SET_ERROR(ENOENT); | |
2468 | goto out; | |
2469 | } | |
2470 | origin_ds = snap->ds; | |
2471 | ||
2472 | /* | |
2473 | * Encrypted clones share a DSL Crypto Key with their origin's dsl dir. | |
2474 | * When doing a promote we must make sure the encryption root for | |
2475 | * both the target and the target's origin does not change to avoid | |
2476 | * needing to rewrap encryption keys | |
2477 | */ | |
2478 | err = dsl_dataset_promote_crypt_check(hds->ds_dir, origin_ds->ds_dir); | |
2479 | if (err != 0) | |
2480 | goto out; | |
2481 | ||
13fe0198 MA |
2482 | /* |
2483 | * Compute and check the amount of space to transfer. Since this is | |
2484 | * so expensive, don't do the preliminary check. | |
2485 | */ | |
2486 | if (!dmu_tx_is_syncing(tx)) { | |
2487 | promote_rele(ddpa, FTAG); | |
2488 | return (0); | |
2489 | } | |
2490 | ||
34dc7c2f | 2491 | /* compute origin's new unique space */ |
13fe0198 | 2492 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2493 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2494 | origin_ds->ds_object); | |
428870ff | 2495 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 2496 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 2497 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 2498 | |
b128c09f BB |
2499 | /* |
2500 | * Walk the snapshots that we are moving | |
2501 | * | |
2502 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 2503 | * to used by each snapshot: |
b128c09f BB |
2504 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
2505 | * So each snapshot gave birth to: | |
2506 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2507 | * So a sequence would look like: | |
2508 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2509 | * Which simplifies to: | |
2510 | * uN + kN + kN-1 + ... + k1 + k0 | |
2511 | * Note however, if we stop before we reach the ORIGIN we get: | |
2512 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2513 | */ | |
788eb90c | 2514 | ss_mv_cnt = 0; |
d683ddbb JG |
2515 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
2516 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2517 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
2518 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2519 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 2520 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 2521 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 2522 | |
788eb90c JJ |
2523 | ss_mv_cnt++; |
2524 | ||
13fe0198 MA |
2525 | /* |
2526 | * If there are long holds, we won't be able to evict | |
2527 | * the objset. | |
2528 | */ | |
2529 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 2530 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
2531 | goto out; |
2532 | } | |
2533 | ||
34dc7c2f | 2534 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 2535 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
2536 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
2537 | err = SET_ERROR(ENAMETOOLONG); | |
2538 | goto out; | |
2539 | } | |
b128c09f | 2540 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 2541 | if (err == 0) { |
13fe0198 | 2542 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); |
2e528b49 | 2543 | err = SET_ERROR(EEXIST); |
428870ff BB |
2544 | goto out; |
2545 | } | |
b128c09f | 2546 | if (err != ENOENT) |
428870ff | 2547 | goto out; |
34dc7c2f | 2548 | |
b128c09f | 2549 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 2550 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 2551 | continue; |
34dc7c2f | 2552 | |
428870ff BB |
2553 | dsl_deadlist_space(&ds->ds_deadlist, |
2554 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
2555 | ddpa->used += dlused; |
2556 | ddpa->comp += dlcomp; | |
2557 | ddpa->uncomp += dluncomp; | |
b128c09f | 2558 | } |
34dc7c2f | 2559 | |
b128c09f BB |
2560 | /* |
2561 | * If we are a clone of a clone then we never reached ORIGIN, | |
2562 | * so we need to subtract out the clone origin's used space. | |
2563 | */ | |
13fe0198 | 2564 | if (ddpa->origin_origin) { |
d683ddbb JG |
2565 | ddpa->used -= |
2566 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2567 | ddpa->comp -= | |
2568 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 2569 | ddpa->uncomp -= |
d683ddbb JG |
2570 | dsl_dataset_phys(ddpa->origin_origin)-> |
2571 | ds_uncompressed_bytes; | |
34dc7c2f BB |
2572 | } |
2573 | ||
788eb90c | 2574 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 2575 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 2576 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
2577 | if (err != 0) |
2578 | goto out; | |
34dc7c2f | 2579 | |
b128c09f BB |
2580 | /* |
2581 | * Compute the amounts of space that will be used by snapshots | |
2582 | * after the promotion (for both origin and clone). For each, | |
2583 | * it is the amount of space that will be on all of their | |
2584 | * deadlists (that was not born before their new origin). | |
2585 | */ | |
d683ddbb | 2586 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
2587 | uint64_t space; |
2588 | ||
2589 | /* | |
2590 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
2591 | * so dd_origin_txg will be < TXG_INITIAL, so |
2592 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
2593 | * calls will be fast because they do not have to |
2594 | * iterate over all bps. | |
2595 | */ | |
13fe0198 | 2596 | snap = list_head(&ddpa->origin_snaps); |
0a8f18f9 | 2597 | if (snap == NULL) { |
2598 | err = SET_ERROR(ENOENT); | |
2599 | goto out; | |
2600 | } | |
13fe0198 MA |
2601 | err = snaplist_space(&ddpa->shared_snaps, |
2602 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2603 | if (err != 0) | |
2604 | goto out; | |
b128c09f | 2605 | |
13fe0198 | 2606 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 2607 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
2608 | if (err != 0) |
2609 | goto out; | |
2610 | ddpa->cloneusedsnap += space; | |
b128c09f | 2611 | } |
d683ddbb JG |
2612 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
2613 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 2614 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
2615 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
2616 | &ddpa->originusedsnap); | |
13fe0198 MA |
2617 | if (err != 0) |
2618 | goto out; | |
b128c09f BB |
2619 | } |
2620 | ||
428870ff | 2621 | out: |
13fe0198 | 2622 | promote_rele(ddpa, FTAG); |
428870ff | 2623 | return (err); |
34dc7c2f BB |
2624 | } |
2625 | ||
2626 | static void | |
13fe0198 | 2627 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2628 | { |
13fe0198 MA |
2629 | dsl_dataset_promote_arg_t *ddpa = arg; |
2630 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2631 | dsl_dataset_t *hds; | |
2632 | struct promotenode *snap; | |
2633 | dsl_dataset_t *origin_ds; | |
b128c09f | 2634 | dsl_dataset_t *origin_head; |
13fe0198 | 2635 | dsl_dir_t *dd; |
34dc7c2f | 2636 | dsl_dir_t *odd = NULL; |
b128c09f BB |
2637 | uint64_t oldnext_obj; |
2638 | int64_t delta; | |
34dc7c2f | 2639 | |
13fe0198 MA |
2640 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
2641 | hds = ddpa->ddpa_clone; | |
2642 | ||
d683ddbb | 2643 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
2644 | |
2645 | snap = list_head(&ddpa->shared_snaps); | |
2646 | origin_ds = snap->ds; | |
2647 | dd = hds->ds_dir; | |
34dc7c2f | 2648 | |
13fe0198 | 2649 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
2650 | origin_head = snap->ds; |
2651 | ||
34dc7c2f BB |
2652 | /* |
2653 | * We need to explicitly open odd, since origin_ds's dd will be | |
2654 | * changing. | |
2655 | */ | |
13fe0198 | 2656 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
2657 | NULL, FTAG, &odd)); |
2658 | ||
b5256303 TC |
2659 | dsl_dataset_promote_crypt_sync(hds->ds_dir, odd, tx); |
2660 | ||
b128c09f BB |
2661 | /* change origin's next snap */ |
2662 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 2663 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 2664 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2665 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2666 | origin_ds->ds_object); | |
2667 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
2668 | |
2669 | /* change the origin's next clone */ | |
d683ddbb | 2670 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
2671 | dsl_dataset_remove_from_next_clones(origin_ds, |
2672 | snap->ds->ds_object, tx); | |
2673 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 2674 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
2675 | oldnext_obj, tx)); |
2676 | } | |
2677 | ||
2678 | /* change origin */ | |
2679 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
2680 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
2681 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 2682 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 2683 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 2684 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 2685 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 2686 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
2687 | |
2688 | /* change dd_clone entries */ | |
2689 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 2690 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2691 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 2692 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2693 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
2694 | hds->ds_object, tx)); |
2695 | ||
13fe0198 | 2696 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2697 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 2698 | origin_head->ds_object, tx)); |
d683ddbb JG |
2699 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
2700 | dsl_dir_phys(dd)->dd_clones = | |
2701 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2702 | DMU_OT_NONE, 0, tx); | |
428870ff | 2703 | } |
13fe0198 | 2704 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2705 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 2706 | } |
34dc7c2f | 2707 | |
b128c09f | 2708 | /* move snapshots to this dir */ |
13fe0198 MA |
2709 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2710 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
2711 | dsl_dataset_t *ds = snap->ds; |
2712 | ||
13fe0198 MA |
2713 | /* |
2714 | * Property callbacks are registered to a particular | |
2715 | * dsl_dir. Since ours is changing, evict the objset | |
2716 | * so that they will be unregistered from the old dsl_dir. | |
2717 | */ | |
428870ff BB |
2718 | if (ds->ds_objset) { |
2719 | dmu_objset_evict(ds->ds_objset); | |
2720 | ds->ds_objset = NULL; | |
b128c09f | 2721 | } |
13fe0198 | 2722 | |
34dc7c2f | 2723 | /* move snap name entry */ |
13fe0198 MA |
2724 | VERIFY0(dsl_dataset_get_snapname(ds)); |
2725 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 2726 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 2727 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 2728 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 2729 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
2730 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
2731 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 2732 | |
34dc7c2f BB |
2733 | /* change containing dsl_dir */ |
2734 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
2735 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
2736 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 2737 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
2738 | dsl_dir_rele(ds->ds_dir, ds); |
2739 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
2740 | NULL, ds, &ds->ds_dir)); |
2741 | ||
428870ff | 2742 | /* move any clone references */ |
d683ddbb | 2743 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
2744 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
2745 | zap_cursor_t zc; | |
2746 | zap_attribute_t za; | |
2747 | ||
2748 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 2749 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 2750 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
2751 | zap_cursor_advance(&zc)) { |
2752 | dsl_dataset_t *cnds; | |
2753 | uint64_t o; | |
34dc7c2f | 2754 | |
13fe0198 MA |
2755 | if (za.za_first_integer == oldnext_obj) { |
2756 | /* | |
2757 | * We've already moved the | |
2758 | * origin's reference. | |
2759 | */ | |
2760 | continue; | |
2761 | } | |
34dc7c2f | 2762 | |
13fe0198 MA |
2763 | VERIFY0(dsl_dataset_hold_obj(dp, |
2764 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
2765 | o = dsl_dir_phys(cnds->ds_dir)-> |
2766 | dd_head_dataset_obj; | |
34dc7c2f | 2767 | |
13fe0198 | 2768 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2769 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 2770 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2771 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
2772 | dsl_dataset_rele(cnds, FTAG); |
2773 | } | |
2774 | zap_cursor_fini(&zc); | |
2775 | } | |
34dc7c2f | 2776 | |
13fe0198 | 2777 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
2778 | } |
2779 | ||
34dc7c2f | 2780 | /* |
13fe0198 MA |
2781 | * Change space accounting. |
2782 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2783 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2784 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 2785 | */ |
570827e1 | 2786 | |
13fe0198 | 2787 | delta = ddpa->cloneusedsnap - |
d683ddbb | 2788 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2789 | ASSERT3S(delta, >=, 0); |
2790 | ASSERT3U(ddpa->used, >=, delta); | |
2791 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2792 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2793 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 2794 | |
13fe0198 | 2795 | delta = ddpa->originusedsnap - |
d683ddbb | 2796 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2797 | ASSERT3S(delta, <=, 0); |
2798 | ASSERT3U(ddpa->used, >=, -delta); | |
2799 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2800 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2801 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2802 | ||
d683ddbb | 2803 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
2804 | |
2805 | /* log history record */ | |
2806 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2807 | ||
2808 | dsl_dir_rele(odd, FTAG); | |
2809 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
2810 | } |
2811 | ||
13fe0198 MA |
2812 | /* |
2813 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2814 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2815 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2816 | * snapshots back to this dataset's origin. | |
2817 | */ | |
34dc7c2f | 2818 | static int |
13fe0198 MA |
2819 | snaplist_make(dsl_pool_t *dp, |
2820 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 2821 | { |
13fe0198 | 2822 | uint64_t obj = last_obj; |
34dc7c2f | 2823 | |
13fe0198 MA |
2824 | list_create(l, sizeof (struct promotenode), |
2825 | offsetof(struct promotenode, link)); | |
34dc7c2f | 2826 | |
13fe0198 MA |
2827 | while (obj != first_obj) { |
2828 | dsl_dataset_t *ds; | |
2829 | struct promotenode *snap; | |
2830 | int err; | |
428870ff | 2831 | |
13fe0198 MA |
2832 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
2833 | ASSERT(err != ENOENT); | |
2834 | if (err != 0) | |
2835 | return (err); | |
34dc7c2f | 2836 | |
13fe0198 | 2837 | if (first_obj == 0) |
d683ddbb | 2838 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 2839 | |
79c76d5b | 2840 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
2841 | snap->ds = ds; |
2842 | list_insert_tail(l, snap); | |
d683ddbb | 2843 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 2844 | } |
34dc7c2f BB |
2845 | |
2846 | return (0); | |
2847 | } | |
2848 | ||
13fe0198 MA |
2849 | static int |
2850 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 2851 | { |
13fe0198 | 2852 | struct promotenode *snap; |
6f1ffb06 | 2853 | |
13fe0198 MA |
2854 | *spacep = 0; |
2855 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2856 | uint64_t used, comp, uncomp; | |
2857 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2858 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2859 | *spacep += used; | |
428870ff | 2860 | } |
13fe0198 | 2861 | return (0); |
34dc7c2f BB |
2862 | } |
2863 | ||
13fe0198 MA |
2864 | static void |
2865 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 2866 | { |
13fe0198 | 2867 | struct promotenode *snap; |
428870ff | 2868 | |
13fe0198 MA |
2869 | if (l == NULL || !list_link_active(&l->list_head)) |
2870 | return; | |
34dc7c2f | 2871 | |
13fe0198 MA |
2872 | while ((snap = list_tail(l)) != NULL) { |
2873 | list_remove(l, snap); | |
2874 | dsl_dataset_rele(snap->ds, tag); | |
2875 | kmem_free(snap, sizeof (*snap)); | |
2876 | } | |
2877 | list_destroy(l); | |
34dc7c2f BB |
2878 | } |
2879 | ||
2880 | static int | |
13fe0198 | 2881 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 2882 | { |
13fe0198 MA |
2883 | int error; |
2884 | dsl_dir_t *dd; | |
2885 | struct promotenode *snap; | |
34dc7c2f | 2886 | |
13fe0198 MA |
2887 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
2888 | &ddpa->ddpa_clone); | |
2889 | if (error != 0) | |
2890 | return (error); | |
2891 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 2892 | |
0c66c32d | 2893 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
2894 | !dsl_dir_is_clone(dd)) { |
2895 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 2896 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2897 | } |
34dc7c2f | 2898 | |
d683ddbb | 2899 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
2900 | &ddpa->shared_snaps, tag); |
2901 | if (error != 0) | |
2902 | goto out; | |
34dc7c2f | 2903 | |
13fe0198 MA |
2904 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
2905 | &ddpa->clone_snaps, tag); | |
2906 | if (error != 0) | |
2907 | goto out; | |
34dc7c2f | 2908 | |
13fe0198 | 2909 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
2910 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
2911 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2912 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
2913 | &ddpa->origin_snaps, tag); |
2914 | if (error != 0) | |
2915 | goto out; | |
d164b209 | 2916 | |
d683ddbb | 2917 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 2918 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 2919 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
2920 | tag, &ddpa->origin_origin); |
2921 | if (error != 0) | |
2922 | goto out; | |
d164b209 | 2923 | } |
13fe0198 MA |
2924 | out: |
2925 | if (error != 0) | |
2926 | promote_rele(ddpa, tag); | |
2927 | return (error); | |
34dc7c2f BB |
2928 | } |
2929 | ||
34dc7c2f | 2930 | static void |
13fe0198 | 2931 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 2932 | { |
13fe0198 MA |
2933 | snaplist_destroy(&ddpa->shared_snaps, tag); |
2934 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2935 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2936 | if (ddpa->origin_origin != NULL) | |
2937 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2938 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2939 | } | |
428870ff | 2940 | |
13fe0198 MA |
2941 | /* |
2942 | * Promote a clone. | |
2943 | * | |
2944 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
eca7b760 | 2945 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
13fe0198 MA |
2946 | */ |
2947 | int | |
2948 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2949 | { | |
2950 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2951 | uint64_t numsnaps; | |
2952 | int error; | |
2953 | objset_t *os; | |
34dc7c2f | 2954 | |
13fe0198 MA |
2955 | /* |
2956 | * We will modify space proportional to the number of | |
2957 | * snapshots. Compute numsnaps. | |
2958 | */ | |
2959 | error = dmu_objset_hold(name, FTAG, &os); | |
2960 | if (error != 0) | |
2961 | return (error); | |
2962 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
2963 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
2964 | &numsnaps); | |
13fe0198 MA |
2965 | dmu_objset_rele(os, FTAG); |
2966 | if (error != 0) | |
2967 | return (error); | |
34dc7c2f | 2968 | |
13fe0198 MA |
2969 | ddpa.ddpa_clonename = name; |
2970 | ddpa.err_ds = conflsnap; | |
788eb90c | 2971 | ddpa.cr = CRED(); |
6f1ffb06 | 2972 | |
13fe0198 | 2973 | return (dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 MA |
2974 | dsl_dataset_promote_sync, &ddpa, |
2975 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2976 | } |
2977 | ||
2978 | int | |
13fe0198 | 2979 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 2980 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 2981 | { |
8c62a0d0 DM |
2982 | /* |
2983 | * "slack" factor for received datasets with refquota set on them. | |
2984 | * See the bottom of this function for details on its use. | |
2985 | */ | |
bf18fd89 CIK |
2986 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * |
2987 | spa_asize_inflation; | |
13fe0198 | 2988 | int64_t unused_refres_delta; |
34dc7c2f | 2989 | |
13fe0198 | 2990 | /* they should both be heads */ |
0c66c32d JG |
2991 | if (clone->ds_is_snapshot || |
2992 | origin_head->ds_is_snapshot) | |
2e528b49 | 2993 | return (SET_ERROR(EINVAL)); |
428870ff | 2994 | |
19580676 MA |
2995 | /* if we are not forcing, the branch point should be just before them */ |
2996 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 2997 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2998 | |
13fe0198 MA |
2999 | /* clone should be the clone (unless they are unrelated) */ |
3000 | if (clone->ds_prev != NULL && | |
3001 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 3002 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 3003 | return (SET_ERROR(EINVAL)); |
428870ff | 3004 | |
13fe0198 MA |
3005 | /* the clone should be a child of the origin */ |
3006 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 3007 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 3008 | |
13fe0198 | 3009 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
3010 | if (!force && |
3011 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 3012 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 3013 | |
13fe0198 | 3014 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 3015 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 3016 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
3017 | |
3018 | /* check amount of any unconsumed refreservation */ | |
3019 | unused_refres_delta = | |
3020 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 3021 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3022 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3023 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3024 | |
3025 | if (unused_refres_delta > 0 && | |
3026 | unused_refres_delta > | |
3027 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 3028 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3029 | |
8c62a0d0 DM |
3030 | /* |
3031 | * The clone can't be too much over the head's refquota. | |
3032 | * | |
3033 | * To ensure that the entire refquota can be used, we allow one | |
3034 | * transaction to exceed the the refquota. Therefore, this check | |
3035 | * needs to also allow for the space referenced to be more than the | |
3036 | * refquota. The maximum amount of space that one transaction can use | |
3037 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
3038 | * overage ensures that we are able to receive a filesystem that | |
3039 | * exceeds the refquota on the source system. | |
3040 | * | |
3041 | * So that overage is the refquota_slack we use below. | |
3042 | */ | |
13fe0198 | 3043 | if (origin_head->ds_quota != 0 && |
d683ddbb | 3044 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
8c62a0d0 | 3045 | origin_head->ds_quota + refquota_slack) |
2e528b49 | 3046 | return (SET_ERROR(EDQUOT)); |
572e2857 | 3047 | |
13fe0198 | 3048 | return (0); |
572e2857 BB |
3049 | } |
3050 | ||
3051 | void | |
13fe0198 MA |
3052 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
3053 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 3054 | { |
13fe0198 MA |
3055 | dsl_pool_t *dp = dmu_tx_pool(tx); |
3056 | int64_t unused_refres_delta; | |
428870ff | 3057 | |
13fe0198 | 3058 | ASSERT(clone->ds_reserved == 0); |
8c62a0d0 DM |
3059 | /* |
3060 | * NOTE: On DEBUG kernels there could be a race between this and | |
3061 | * the check function if spa_asize_inflation is adjusted... | |
3062 | */ | |
13fe0198 | 3063 | ASSERT(origin_head->ds_quota == 0 || |
8c62a0d0 DM |
3064 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
3065 | DMU_MAX_ACCESS * spa_asize_inflation); | |
19580676 | 3066 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 3067 | |
241b5415 MA |
3068 | /* |
3069 | * Swap per-dataset feature flags. | |
3070 | */ | |
4a5d7f82 | 3071 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
3072 | if (!(spa_feature_table[f].fi_flags & |
3073 | ZFEATURE_FLAG_PER_DATASET)) { | |
3074 | ASSERT(!clone->ds_feature_inuse[f]); | |
3075 | ASSERT(!origin_head->ds_feature_inuse[f]); | |
3076 | continue; | |
3077 | } | |
3078 | ||
1c27024e DB |
3079 | boolean_t clone_inuse = clone->ds_feature_inuse[f]; |
3080 | boolean_t origin_head_inuse = origin_head->ds_feature_inuse[f]; | |
241b5415 MA |
3081 | |
3082 | if (clone_inuse) { | |
3083 | dsl_dataset_deactivate_feature(clone->ds_object, f, tx); | |
3084 | clone->ds_feature_inuse[f] = B_FALSE; | |
3085 | } | |
3086 | if (origin_head_inuse) { | |
3087 | dsl_dataset_deactivate_feature(origin_head->ds_object, | |
3088 | f, tx); | |
3089 | origin_head->ds_feature_inuse[f] = B_FALSE; | |
3090 | } | |
3091 | if (clone_inuse) { | |
3092 | dsl_dataset_activate_feature(origin_head->ds_object, | |
3093 | f, tx); | |
3094 | origin_head->ds_feature_inuse[f] = B_TRUE; | |
3095 | } | |
3096 | if (origin_head_inuse) { | |
3097 | dsl_dataset_activate_feature(clone->ds_object, f, tx); | |
3098 | clone->ds_feature_inuse[f] = B_TRUE; | |
3099 | } | |
3100 | } | |
3101 | ||
13fe0198 MA |
3102 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
3103 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 3104 | |
13fe0198 MA |
3105 | if (clone->ds_objset != NULL) { |
3106 | dmu_objset_evict(clone->ds_objset); | |
3107 | clone->ds_objset = NULL; | |
3108 | } | |
45d1cae3 | 3109 | |
13fe0198 MA |
3110 | if (origin_head->ds_objset != NULL) { |
3111 | dmu_objset_evict(origin_head->ds_objset); | |
3112 | origin_head->ds_objset = NULL; | |
45d1cae3 | 3113 | } |
45d1cae3 | 3114 | |
13fe0198 MA |
3115 | unused_refres_delta = |
3116 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 3117 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3118 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3119 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3120 | |
3121 | /* | |
3122 | * Reset origin's unique bytes, if it exists. | |
3123 | */ | |
3124 | if (clone->ds_prev) { | |
3125 | dsl_dataset_t *origin = clone->ds_prev; | |
3126 | uint64_t comp, uncomp; | |
3127 | ||
3128 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
3129 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
3130 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
3131 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
3132 | } |
3133 | ||
3134 | /* swap blkptrs */ | |
3135 | { | |
cc9bb3e5 GM |
3136 | rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG); |
3137 | rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG); | |
1c27024e | 3138 | blkptr_t tmp; |
d683ddbb JG |
3139 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
3140 | dsl_dataset_phys(origin_head)->ds_bp = | |
3141 | dsl_dataset_phys(clone)->ds_bp; | |
3142 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
cc9bb3e5 GM |
3143 | rrw_exit(&origin_head->ds_bp_rwlock, FTAG); |
3144 | rrw_exit(&clone->ds_bp_rwlock, FTAG); | |
13fe0198 MA |
3145 | } |
3146 | ||
3147 | /* set dd_*_bytes */ | |
3148 | { | |
3149 | int64_t dused, dcomp, duncomp; | |
3150 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
3151 | uint64_t odl_used, odl_comp, odl_uncomp; | |
3152 | ||
d683ddbb | 3153 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
3154 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
3155 | ||
3156 | dsl_deadlist_space(&clone->ds_deadlist, | |
3157 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3158 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
3159 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 3160 | |
d683ddbb JG |
3161 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
3162 | cdl_used - | |
3163 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
3164 | odl_used); | |
3165 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
3166 | cdl_comp - | |
3167 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
3168 | odl_comp); | |
3169 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 3170 | cdl_uncomp - |
d683ddbb JG |
3171 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
3172 | odl_uncomp); | |
45d1cae3 | 3173 | |
13fe0198 MA |
3174 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
3175 | dused, dcomp, duncomp, tx); | |
3176 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
3177 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 3178 | |
45d1cae3 | 3179 | /* |
13fe0198 MA |
3180 | * The difference in the space used by snapshots is the |
3181 | * difference in snapshot space due to the head's | |
3182 | * deadlist (since that's the only thing that's | |
3183 | * changing that affects the snapused). | |
45d1cae3 | 3184 | */ |
13fe0198 MA |
3185 | dsl_deadlist_space_range(&clone->ds_deadlist, |
3186 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3187 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3188 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
3189 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3190 | &odl_used, &odl_comp, &odl_uncomp); | |
3191 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
3192 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 3193 | } |
45d1cae3 | 3194 | |
13fe0198 | 3195 | /* swap ds_*_bytes */ |
d683ddbb JG |
3196 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
3197 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
3198 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
3199 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
3200 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
3201 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
3202 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
3203 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 3204 | |
13fe0198 MA |
3205 | /* apply any parent delta for change in unconsumed refreservation */ |
3206 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
3207 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 3208 | |
13fe0198 MA |
3209 | /* |
3210 | * Swap deadlists. | |
3211 | */ | |
3212 | dsl_deadlist_close(&clone->ds_deadlist); | |
3213 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
3214 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
3215 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 3216 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3217 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 3218 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3219 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
45d1cae3 | 3220 | |
13fe0198 | 3221 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 3222 | |
13fe0198 MA |
3223 | spa_history_log_internal_ds(clone, "clone swap", tx, |
3224 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
3225 | } |
3226 | ||
13fe0198 MA |
3227 | /* |
3228 | * Given a pool name and a dataset object number in that pool, | |
3229 | * return the name of that dataset. | |
3230 | */ | |
572e2857 | 3231 | int |
13fe0198 | 3232 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 3233 | { |
13fe0198 MA |
3234 | dsl_pool_t *dp; |
3235 | dsl_dataset_t *ds; | |
572e2857 BB |
3236 | int error; |
3237 | ||
13fe0198 MA |
3238 | error = dsl_pool_hold(pname, FTAG, &dp); |
3239 | if (error != 0) | |
3240 | return (error); | |
3241 | ||
3242 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
3243 | if (error == 0) { | |
3244 | dsl_dataset_name(ds, buf); | |
3245 | dsl_dataset_rele(ds, FTAG); | |
3246 | } | |
3247 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
3248 | |
3249 | return (error); | |
3250 | } | |
3251 | ||
45d1cae3 | 3252 | int |
13fe0198 MA |
3253 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
3254 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 3255 | { |
13fe0198 | 3256 | int error = 0; |
45d1cae3 | 3257 | |
13fe0198 | 3258 | ASSERT3S(asize, >, 0); |
45d1cae3 | 3259 | |
13fe0198 MA |
3260 | /* |
3261 | * *ref_rsrv is the portion of asize that will come from any | |
3262 | * unconsumed refreservation space. | |
3263 | */ | |
3264 | *ref_rsrv = 0; | |
45d1cae3 | 3265 | |
13fe0198 MA |
3266 | mutex_enter(&ds->ds_lock); |
3267 | /* | |
3268 | * Make a space adjustment for reserved bytes. | |
3269 | */ | |
d683ddbb | 3270 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 3271 | ASSERT3U(*used, >=, |
d683ddbb JG |
3272 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
3273 | *used -= | |
3274 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
3275 | *ref_rsrv = |
3276 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
3277 | } |
3278 | ||
13fe0198 MA |
3279 | if (!check_quota || ds->ds_quota == 0) { |
3280 | mutex_exit(&ds->ds_lock); | |
3281 | return (0); | |
45d1cae3 | 3282 | } |
13fe0198 MA |
3283 | /* |
3284 | * If they are requesting more space, and our current estimate | |
3285 | * is over quota, they get to try again unless the actual | |
3286 | * on-disk is over quota and there are no pending changes (which | |
3287 | * may free up space for us). | |
3288 | */ | |
d683ddbb JG |
3289 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
3290 | ds->ds_quota) { | |
13fe0198 | 3291 | if (inflight > 0 || |
d683ddbb | 3292 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 3293 | error = SET_ERROR(ERESTART); |
13fe0198 | 3294 | else |
2e528b49 | 3295 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 3296 | } |
13fe0198 | 3297 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3298 | |
45d1cae3 BB |
3299 | return (error); |
3300 | } | |
3301 | ||
13fe0198 MA |
3302 | typedef struct dsl_dataset_set_qr_arg { |
3303 | const char *ddsqra_name; | |
3304 | zprop_source_t ddsqra_source; | |
3305 | uint64_t ddsqra_value; | |
3306 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 3307 | |
13fe0198 MA |
3308 | |
3309 | /* ARGSUSED */ | |
45d1cae3 | 3310 | static int |
13fe0198 | 3311 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3312 | { |
13fe0198 MA |
3313 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3314 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3315 | dsl_dataset_t *ds; | |
45d1cae3 | 3316 | int error; |
13fe0198 | 3317 | uint64_t newval; |
45d1cae3 | 3318 | |
13fe0198 | 3319 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 3320 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3321 | |
13fe0198 MA |
3322 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3323 | if (error != 0) | |
3324 | return (error); | |
3325 | ||
0c66c32d | 3326 | if (ds->ds_is_snapshot) { |
13fe0198 | 3327 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3328 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3329 | } |
3330 | ||
13fe0198 MA |
3331 | error = dsl_prop_predict(ds->ds_dir, |
3332 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3333 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3334 | if (error != 0) { | |
3335 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3336 | return (error); |
3337 | } | |
3338 | ||
13fe0198 MA |
3339 | if (newval == 0) { |
3340 | dsl_dataset_rele(ds, FTAG); | |
3341 | return (0); | |
3342 | } | |
3343 | ||
d683ddbb | 3344 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
3345 | newval < ds->ds_reserved) { |
3346 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3347 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3348 | } |
45d1cae3 | 3349 | |
13fe0198 | 3350 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3351 | return (0); |
3352 | } | |
3353 | ||
13fe0198 MA |
3354 | static void |
3355 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3356 | { |
13fe0198 MA |
3357 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3358 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3359 | dsl_dataset_t *ds = NULL; |
13fe0198 | 3360 | uint64_t newval; |
45d1cae3 | 3361 | |
13fe0198 | 3362 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 3363 | |
13fe0198 MA |
3364 | dsl_prop_set_sync_impl(ds, |
3365 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3366 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
3367 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3368 | |
13fe0198 MA |
3369 | VERIFY0(dsl_prop_get_int_ds(ds, |
3370 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 3371 | |
13fe0198 MA |
3372 | if (ds->ds_quota != newval) { |
3373 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3374 | ds->ds_quota = newval; | |
45d1cae3 | 3375 | } |
13fe0198 | 3376 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3377 | } |
3378 | ||
13fe0198 MA |
3379 | int |
3380 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
3381 | uint64_t refquota) | |
45d1cae3 | 3382 | { |
13fe0198 | 3383 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3384 | |
13fe0198 MA |
3385 | ddsqra.ddsqra_name = dsname; |
3386 | ddsqra.ddsqra_source = source; | |
3387 | ddsqra.ddsqra_value = refquota; | |
3388 | ||
3389 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3d45fdd6 | 3390 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); |
45d1cae3 BB |
3391 | } |
3392 | ||
3393 | static int | |
13fe0198 | 3394 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3395 | { |
13fe0198 MA |
3396 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3397 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
3398 | dsl_dataset_t *ds; |
3399 | int error; | |
13fe0198 | 3400 | uint64_t newval, unique; |
428870ff | 3401 | |
13fe0198 | 3402 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 3403 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3404 | |
13fe0198 MA |
3405 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3406 | if (error != 0) | |
45d1cae3 | 3407 | return (error); |
45d1cae3 | 3408 | |
0c66c32d | 3409 | if (ds->ds_is_snapshot) { |
13fe0198 | 3410 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3411 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3412 | } |
3413 | ||
13fe0198 MA |
3414 | error = dsl_prop_predict(ds->ds_dir, |
3415 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3416 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3417 | if (error != 0) { | |
3418 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3419 | return (error); |
3420 | } | |
3421 | ||
13fe0198 MA |
3422 | /* |
3423 | * If we are doing the preliminary check in open context, the | |
3424 | * space estimates may be inaccurate. | |
3425 | */ | |
3426 | if (!dmu_tx_is_syncing(tx)) { | |
3427 | dsl_dataset_rele(ds, FTAG); | |
3428 | return (0); | |
45d1cae3 | 3429 | } |
45d1cae3 | 3430 | |
13fe0198 MA |
3431 | mutex_enter(&ds->ds_lock); |
3432 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3433 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 3434 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 3435 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3436 | |
13fe0198 MA |
3437 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
3438 | uint64_t delta = MAX(unique, newval) - | |
3439 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 3440 | |
13fe0198 MA |
3441 | if (delta > |
3442 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3443 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3444 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3445 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3446 | } |
45d1cae3 BB |
3447 | } |
3448 | ||
13fe0198 MA |
3449 | dsl_dataset_rele(ds, FTAG); |
3450 | return (0); | |
45d1cae3 BB |
3451 | } |
3452 | ||
13fe0198 MA |
3453 | void |
3454 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3455 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 3456 | { |
13fe0198 MA |
3457 | uint64_t newval; |
3458 | uint64_t unique; | |
3459 | int64_t delta; | |
428870ff | 3460 | |
13fe0198 MA |
3461 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
3462 | source, sizeof (value), 1, &value, tx); | |
428870ff | 3463 | |
13fe0198 MA |
3464 | VERIFY0(dsl_prop_get_int_ds(ds, |
3465 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 3466 | |
13fe0198 MA |
3467 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
3468 | mutex_enter(&ds->ds_dir->dd_lock); | |
3469 | mutex_enter(&ds->ds_lock); | |
3470 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 3471 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
3472 | delta = MAX(0, (int64_t)(newval - unique)) - |
3473 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3474 | ds->ds_reserved = newval; | |
3475 | mutex_exit(&ds->ds_lock); | |
572e2857 | 3476 | |
13fe0198 MA |
3477 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
3478 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
3479 | } |
3480 | ||
13fe0198 MA |
3481 | static void |
3482 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3483 | { |
13fe0198 MA |
3484 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3485 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3486 | dsl_dataset_t *ds = NULL; |
45d1cae3 | 3487 | |
13fe0198 MA |
3488 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
3489 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3490 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3491 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 3492 | } |
428870ff | 3493 | |
428870ff | 3494 | int |
13fe0198 MA |
3495 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
3496 | uint64_t refreservation) | |
428870ff | 3497 | { |
13fe0198 | 3498 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3499 | |
13fe0198 MA |
3500 | ddsqra.ddsqra_name = dsname; |
3501 | ddsqra.ddsqra_source = source; | |
3502 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 3503 | |
13fe0198 | 3504 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
3d45fdd6 MA |
3505 | dsl_dataset_set_refreservation_sync, &ddsqra, |
3506 | 0, ZFS_SPACE_CHECK_NONE)); | |
13fe0198 | 3507 | } |
330d06f9 MA |
3508 | |
3509 | /* | |
3510 | * Return (in *usedp) the amount of space written in new that is not | |
3511 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3512 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3513 | * fail and return EINVAL. | |
3514 | * | |
3515 | * The written space is calculated by considering two components: First, we | |
3516 | * ignore any freed space, and calculate the written as new's used space | |
3517 | * minus old's used space. Next, we add in the amount of space that was freed | |
3518 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3519 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3520 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3521 | * | |
3522 | * space freed [---------------------] | |
3523 | * snapshots ---O-------O--------O-------O------ | |
3524 | * oldsnap new | |
3525 | */ | |
3526 | int | |
3527 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3528 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3529 | { | |
3530 | int err = 0; | |
3531 | uint64_t snapobj; | |
3532 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3533 | ||
13fe0198 MA |
3534 | ASSERT(dsl_pool_config_held(dp)); |
3535 | ||
330d06f9 | 3536 | *usedp = 0; |
d683ddbb JG |
3537 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
3538 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
3539 | |
3540 | *compp = 0; | |
d683ddbb JG |
3541 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
3542 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
3543 | |
3544 | *uncompp = 0; | |
d683ddbb JG |
3545 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
3546 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 3547 | |
330d06f9 MA |
3548 | snapobj = new->ds_object; |
3549 | while (snapobj != oldsnap->ds_object) { | |
3550 | dsl_dataset_t *snap; | |
3551 | uint64_t used, comp, uncomp; | |
3552 | ||
9ae529ec CS |
3553 | if (snapobj == new->ds_object) { |
3554 | snap = new; | |
3555 | } else { | |
3556 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3557 | if (err != 0) | |
3558 | break; | |
3559 | } | |
330d06f9 | 3560 | |
d683ddbb JG |
3561 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
3562 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
3563 | /* |
3564 | * The blocks in the deadlist can not be born after | |
3565 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3566 | * which is more efficient (especially for old-format | |
3567 | * deadlists). Unfortunately the deadlist code | |
3568 | * doesn't have enough information to make this | |
3569 | * optimization itself. | |
3570 | */ | |
3571 | dsl_deadlist_space(&snap->ds_deadlist, | |
3572 | &used, &comp, &uncomp); | |
3573 | } else { | |
3574 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 3575 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
3576 | &used, &comp, &uncomp); |
3577 | } | |
3578 | *usedp += used; | |
3579 | *compp += comp; | |
3580 | *uncompp += uncomp; | |
3581 | ||
3582 | /* | |
3583 | * If we get to the beginning of the chain of snapshots | |
3584 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3585 | * was not a snapshot of/before new. | |
3586 | */ | |
d683ddbb | 3587 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
3588 | if (snap != new) |
3589 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 3590 | if (snapobj == 0) { |
2e528b49 | 3591 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
3592 | break; |
3593 | } | |
3594 | ||
3595 | } | |
330d06f9 MA |
3596 | return (err); |
3597 | } | |
3598 | ||
3599 | /* | |
3600 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3601 | * lastsnap, and all snapshots in between are deleted. | |
3602 | * | |
3603 | * blocks that would be freed [---------------------------] | |
3604 | * snapshots ---O-------O--------O-------O--------O | |
3605 | * firstsnap lastsnap | |
3606 | * | |
3607 | * This is the set of blocks that were born after the snap before firstsnap, | |
3608 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3609 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3610 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3611 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3612 | * space on the deadlist that was born after the snap before firstsnap. | |
3613 | */ | |
3614 | int | |
3615 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3616 | dsl_dataset_t *lastsnap, | |
3617 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3618 | { | |
3619 | int err = 0; | |
3620 | uint64_t snapobj; | |
3621 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3622 | ||
0c66c32d JG |
3623 | ASSERT(firstsnap->ds_is_snapshot); |
3624 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
3625 | |
3626 | /* | |
3627 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3628 | * is before lastsnap. | |
3629 | */ | |
3630 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
3631 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
3632 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 3633 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
3634 | |
3635 | *usedp = *compp = *uncompp = 0; | |
3636 | ||
d683ddbb | 3637 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
3638 | while (snapobj != firstsnap->ds_object) { |
3639 | dsl_dataset_t *ds; | |
3640 | uint64_t used, comp, uncomp; | |
3641 | ||
3642 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3643 | if (err != 0) | |
3644 | break; | |
3645 | ||
3646 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 3647 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
3648 | &used, &comp, &uncomp); |
3649 | *usedp += used; | |
3650 | *compp += comp; | |
3651 | *uncompp += uncomp; | |
3652 | ||
d683ddbb | 3653 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
3654 | ASSERT3U(snapobj, !=, 0); |
3655 | dsl_dataset_rele(ds, FTAG); | |
3656 | } | |
330d06f9 MA |
3657 | return (err); |
3658 | } | |
3659 | ||
13fe0198 MA |
3660 | /* |
3661 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3662 | * For example, they could both be snapshots of the same filesystem, and | |
3663 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3664 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3665 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
3666 | * |
3667 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
3668 | */ |
3669 | boolean_t | |
da536844 | 3670 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
e9aa730c | 3671 | uint64_t earlier_txg) |
13fe0198 MA |
3672 | { |
3673 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3674 | int error; | |
3675 | boolean_t ret; | |
13fe0198 MA |
3676 | |
3677 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 3678 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
3679 | |
3680 | if (earlier_txg == 0) | |
d683ddbb | 3681 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 3682 | |
0c66c32d | 3683 | if (later->ds_is_snapshot && |
d683ddbb | 3684 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
3685 | return (B_FALSE); |
3686 | ||
3687 | if (later->ds_dir == earlier->ds_dir) | |
3688 | return (B_TRUE); | |
3689 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3690 | return (B_FALSE); | |
3691 | ||
d683ddbb | 3692 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 | 3693 | return (B_TRUE); |
1c27024e | 3694 | dsl_dataset_t *origin; |
13fe0198 | 3695 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 3696 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
3697 | if (error != 0) |
3698 | return (B_FALSE); | |
da536844 | 3699 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
3700 | dsl_dataset_rele(origin, FTAG); |
3701 | return (ret); | |
3702 | } | |
3703 | ||
fa86b5db MA |
3704 | void |
3705 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3706 | { | |
3707 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3708 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3709 | } | |
3710 | ||
47dfff3b MA |
3711 | boolean_t |
3712 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
3713 | { | |
3714 | dmu_object_info_t doi; | |
3715 | ||
3716 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
3717 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
3718 | } | |
3719 | ||
3720 | boolean_t | |
3721 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
3722 | { | |
3723 | return (dsl_dataset_is_zapified(ds) && | |
3724 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
3725 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
3726 | } | |
3727 | ||
c28b2279 | 3728 | #if defined(_KERNEL) && defined(HAVE_SPL) |
f1512ee6 MA |
3729 | #if defined(_LP64) |
3730 | module_param(zfs_max_recordsize, int, 0644); | |
3731 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3732 | #else | |
3733 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3734 | module_param(zfs_max_recordsize, int, 0444); | |
3735 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3736 | #endif | |
3737 | ||
c28b2279 | 3738 | EXPORT_SYMBOL(dsl_dataset_hold); |
b5256303 | 3739 | EXPORT_SYMBOL(dsl_dataset_hold_flags); |
c28b2279 | 3740 | EXPORT_SYMBOL(dsl_dataset_hold_obj); |
b5256303 | 3741 | EXPORT_SYMBOL(dsl_dataset_hold_obj_flags); |
c28b2279 BB |
3742 | EXPORT_SYMBOL(dsl_dataset_own); |
3743 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3744 | EXPORT_SYMBOL(dsl_dataset_name); | |
3745 | EXPORT_SYMBOL(dsl_dataset_rele); | |
b5256303 | 3746 | EXPORT_SYMBOL(dsl_dataset_rele_flags); |
c28b2279 | 3747 | EXPORT_SYMBOL(dsl_dataset_disown); |
c28b2279 | 3748 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
3749 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
3750 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
3751 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
3752 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 3753 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
3754 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
3755 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
3756 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
3757 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
c28b2279 | 3758 | EXPORT_SYMBOL(dsl_dataset_get_spa); |
19580676 | 3759 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
3760 | EXPORT_SYMBOL(dsl_dataset_space_written); |
3761 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
3762 | EXPORT_SYMBOL(dsl_dataset_sync); |
3763 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3764 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
c28b2279 BB |
3765 | EXPORT_SYMBOL(dsl_dataset_dirty); |
3766 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3767 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3768 | EXPORT_SYMBOL(dsl_dataset_space); | |
3769 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3770 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3771 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
3772 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
3773 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 3774 | #endif |