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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
13fe0198 | 23 | * Copyright (c) 2013 by Delphix. All rights reserved. |
788eb90c | 24 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
36f92e93 | 25 | * Copyright (c) 2014 RackTop Systems. |
0c66c32d | 26 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
34dc7c2f BB |
27 | */ |
28 | ||
34dc7c2f BB |
29 | #include <sys/dmu_objset.h> |
30 | #include <sys/dsl_dataset.h> | |
31 | #include <sys/dsl_dir.h> | |
32 | #include <sys/dsl_prop.h> | |
33 | #include <sys/dsl_synctask.h> | |
34 | #include <sys/dmu_traverse.h> | |
37abac6d | 35 | #include <sys/dmu_impl.h> |
34dc7c2f BB |
36 | #include <sys/dmu_tx.h> |
37 | #include <sys/arc.h> | |
38 | #include <sys/zio.h> | |
39 | #include <sys/zap.h> | |
9ae529ec | 40 | #include <sys/zfeature.h> |
34dc7c2f BB |
41 | #include <sys/unique.h> |
42 | #include <sys/zfs_context.h> | |
43 | #include <sys/zfs_ioctl.h> | |
44 | #include <sys/spa.h> | |
b128c09f | 45 | #include <sys/zfs_znode.h> |
572e2857 | 46 | #include <sys/zfs_onexit.h> |
45d1cae3 | 47 | #include <sys/zvol.h> |
428870ff BB |
48 | #include <sys/dsl_scan.h> |
49 | #include <sys/dsl_deadlist.h> | |
13fe0198 MA |
50 | #include <sys/dsl_destroy.h> |
51 | #include <sys/dsl_userhold.h> | |
da536844 | 52 | #include <sys/dsl_bookmark.h> |
34dc7c2f | 53 | |
f1512ee6 MA |
54 | /* |
55 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
56 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
57 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
58 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
59 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
60 | * and pools with larger blocks can always be imported and used, regardless | |
61 | * of this setting. | |
62 | */ | |
63 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
64 | ||
428870ff BB |
65 | #define SWITCH64(x, y) \ |
66 | { \ | |
67 | uint64_t __tmp = (x); \ | |
68 | (x) = (y); \ | |
69 | (y) = __tmp; \ | |
70 | } | |
71 | ||
34dc7c2f BB |
72 | #define DS_REF_MAX (1ULL << 62) |
73 | ||
d683ddbb | 74 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 75 | |
34dc7c2f BB |
76 | /* |
77 | * Figure out how much of this delta should be propogated to the dsl_dir | |
78 | * layer. If there's a refreservation, that space has already been | |
79 | * partially accounted for in our ancestors. | |
80 | */ | |
81 | static int64_t | |
82 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
83 | { | |
d683ddbb | 84 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
85 | uint64_t old_bytes, new_bytes; |
86 | ||
87 | if (ds->ds_reserved == 0) | |
88 | return (delta); | |
89 | ||
d683ddbb JG |
90 | ds_phys = dsl_dataset_phys(ds); |
91 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
92 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
34dc7c2f BB |
93 | |
94 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
95 | return (new_bytes - old_bytes); | |
96 | } | |
97 | ||
98 | void | |
428870ff | 99 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 100 | { |
d6320ddb | 101 | int used, compressed, uncompressed; |
34dc7c2f BB |
102 | int64_t delta; |
103 | ||
d6320ddb BB |
104 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
105 | compressed = BP_GET_PSIZE(bp); | |
106 | uncompressed = BP_GET_UCSIZE(bp); | |
107 | ||
428870ff | 108 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
109 | |
110 | ASSERT(dmu_tx_is_syncing(tx)); | |
111 | /* It could have been compressed away to nothing */ | |
112 | if (BP_IS_HOLE(bp)) | |
113 | return; | |
114 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 115 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 116 | if (ds == NULL) { |
29809a6c MA |
117 | dsl_pool_mos_diduse_space(tx->tx_pool, |
118 | used, compressed, uncompressed); | |
34dc7c2f BB |
119 | return; |
120 | } | |
428870ff | 121 | |
a169a625 | 122 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
123 | mutex_enter(&ds->ds_lock); |
124 | delta = parent_delta(ds, used); | |
d683ddbb JG |
125 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
126 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
127 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
128 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
f1512ee6 MA |
129 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) |
130 | ds->ds_need_large_blocks = B_TRUE; | |
34dc7c2f | 131 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
132 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
133 | compressed, uncompressed, tx); | |
134 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
135 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
136 | } |
137 | ||
b128c09f | 138 | int |
428870ff BB |
139 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
140 | boolean_t async) | |
34dc7c2f | 141 | { |
b0bc7a84 MG |
142 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
143 | int compressed = BP_GET_PSIZE(bp); | |
144 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 145 | |
34dc7c2f | 146 | if (BP_IS_HOLE(bp)) |
b128c09f | 147 | return (0); |
34dc7c2f | 148 | |
428870ff BB |
149 | ASSERT(dmu_tx_is_syncing(tx)); |
150 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
151 | ||
34dc7c2f | 152 | if (ds == NULL) { |
428870ff | 153 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
154 | dsl_pool_mos_diduse_space(tx->tx_pool, |
155 | -used, -compressed, -uncompressed); | |
b128c09f | 156 | return (used); |
34dc7c2f BB |
157 | } |
158 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
159 | ||
0c66c32d | 160 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
161 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
162 | ||
d683ddbb | 163 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
164 | int64_t delta; |
165 | ||
428870ff BB |
166 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
167 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
168 | |
169 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 170 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
171 | !DS_UNIQUE_IS_ACCURATE(ds)); |
172 | delta = parent_delta(ds, -used); | |
d683ddbb | 173 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 174 | mutex_exit(&ds->ds_lock); |
b128c09f | 175 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 176 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
177 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
178 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
179 | } else { |
180 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
181 | if (async) { |
182 | /* | |
183 | * We are here as part of zio's write done callback, | |
184 | * which means we're a zio interrupt thread. We can't | |
185 | * call dsl_deadlist_insert() now because it may block | |
186 | * waiting for I/O. Instead, put bp on the deferred | |
187 | * queue and let dsl_pool_sync() finish the job. | |
188 | */ | |
189 | bplist_append(&ds->ds_pending_deadlist, bp); | |
190 | } else { | |
191 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
192 | } | |
34dc7c2f | 193 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
194 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
195 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 196 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 197 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 198 | ds->ds_object && bp->blk_birth > |
d683ddbb | 199 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
200 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
201 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 202 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
203 | mutex_exit(&ds->ds_prev->ds_lock); |
204 | } | |
428870ff | 205 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
206 | dsl_dir_transfer_space(ds->ds_dir, used, |
207 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
208 | } | |
34dc7c2f BB |
209 | } |
210 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
211 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
212 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
213 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
214 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
215 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
216 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 217 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
218 | |
219 | return (used); | |
34dc7c2f BB |
220 | } |
221 | ||
222 | uint64_t | |
223 | dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
224 | { | |
225 | uint64_t trysnap = 0; | |
226 | ||
227 | if (ds == NULL) | |
228 | return (0); | |
229 | /* | |
230 | * The snapshot creation could fail, but that would cause an | |
231 | * incorrect FALSE return, which would only result in an | |
232 | * overestimation of the amount of space that an operation would | |
233 | * consume, which is OK. | |
234 | * | |
235 | * There's also a small window where we could miss a pending | |
236 | * snapshot, because we could set the sync task in the quiescing | |
237 | * phase. So this should only be used as a guess. | |
238 | */ | |
239 | if (ds->ds_trysnap_txg > | |
240 | spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
241 | trysnap = ds->ds_trysnap_txg; | |
d683ddbb | 242 | return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); |
34dc7c2f BB |
243 | } |
244 | ||
9babb374 | 245 | boolean_t |
428870ff BB |
246 | dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, |
247 | uint64_t blk_birth) | |
34dc7c2f | 248 | { |
b0bc7a84 MG |
249 | if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || |
250 | (bp != NULL && BP_IS_HOLE(bp))) | |
428870ff BB |
251 | return (B_FALSE); |
252 | ||
572e2857 | 253 | ddt_prefetch(dsl_dataset_get_spa(ds), bp); |
428870ff BB |
254 | |
255 | return (B_TRUE); | |
34dc7c2f BB |
256 | } |
257 | ||
34dc7c2f | 258 | static void |
0c66c32d | 259 | dsl_dataset_evict(void *dbu) |
34dc7c2f | 260 | { |
0c66c32d | 261 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 262 | |
13fe0198 | 263 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 264 | |
0c66c32d JG |
265 | ds->ds_dbuf = NULL; |
266 | ||
34dc7c2f BB |
267 | unique_remove(ds->ds_fsid_guid); |
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 | ||
285 | mutex_destroy(&ds->ds_lock); | |
286 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 287 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 288 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f BB |
289 | |
290 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
291 | } | |
292 | ||
13fe0198 | 293 | int |
34dc7c2f BB |
294 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
295 | { | |
296 | dsl_dataset_phys_t *headphys; | |
297 | int err; | |
298 | dmu_buf_t *headdbuf; | |
299 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
300 | objset_t *mos = dp->dp_meta_objset; | |
301 | ||
302 | if (ds->ds_snapname[0]) | |
303 | return (0); | |
d683ddbb | 304 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
305 | return (0); |
306 | ||
d683ddbb | 307 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 308 | FTAG, &headdbuf); |
13fe0198 | 309 | if (err != 0) |
34dc7c2f BB |
310 | return (err); |
311 | headphys = headdbuf->db_data; | |
312 | err = zap_value_search(dp->dp_meta_objset, | |
313 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
314 | dmu_buf_rele(headdbuf, FTAG); | |
315 | return (err); | |
316 | } | |
317 | ||
6772fb67 | 318 | int |
b128c09f | 319 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 320 | { |
b128c09f | 321 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 322 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
323 | matchtype_t mt; |
324 | int err; | |
325 | ||
d683ddbb | 326 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
327 | mt = MT_FIRST; |
328 | else | |
329 | mt = MT_EXACT; | |
330 | ||
b128c09f | 331 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f BB |
332 | value, mt, NULL, 0, NULL); |
333 | if (err == ENOTSUP && mt == MT_FIRST) | |
b128c09f | 334 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
335 | return (err); |
336 | } | |
337 | ||
13fe0198 | 338 | int |
788eb90c JJ |
339 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
340 | boolean_t adj_cnt) | |
34dc7c2f | 341 | { |
b128c09f | 342 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 343 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
344 | matchtype_t mt; |
345 | int err; | |
346 | ||
428870ff BB |
347 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
348 | ||
d683ddbb | 349 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
350 | mt = MT_FIRST; |
351 | else | |
352 | mt = MT_EXACT; | |
353 | ||
b128c09f | 354 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
34dc7c2f | 355 | if (err == ENOTSUP && mt == MT_FIRST) |
b128c09f | 356 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
357 | |
358 | if (err == 0 && adj_cnt) | |
359 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
360 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
361 | ||
34dc7c2f BB |
362 | return (err); |
363 | } | |
364 | ||
6ebebace JG |
365 | boolean_t |
366 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
367 | { | |
6186e297 JG |
368 | dmu_buf_t *dbuf = ds->ds_dbuf; |
369 | boolean_t result = B_FALSE; | |
370 | ||
371 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
372 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
373 | ||
374 | if (ds == dmu_buf_get_user(dbuf)) | |
375 | result = B_TRUE; | |
376 | else | |
377 | dmu_buf_rele(dbuf, tag); | |
378 | } | |
379 | ||
380 | return (result); | |
6ebebace JG |
381 | } |
382 | ||
13fe0198 MA |
383 | int |
384 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, | |
b128c09f | 385 | dsl_dataset_t **dsp) |
34dc7c2f | 386 | { |
34dc7c2f BB |
387 | objset_t *mos = dp->dp_meta_objset; |
388 | dmu_buf_t *dbuf; | |
389 | dsl_dataset_t *ds; | |
390 | int err; | |
572e2857 | 391 | dmu_object_info_t doi; |
34dc7c2f | 392 | |
13fe0198 | 393 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
394 | |
395 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 396 | if (err != 0) |
34dc7c2f | 397 | return (err); |
572e2857 BB |
398 | |
399 | /* Make sure dsobj has the correct object type. */ | |
400 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 401 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 402 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 403 | return (SET_ERROR(EINVAL)); |
3a84951d | 404 | } |
572e2857 | 405 | |
34dc7c2f BB |
406 | ds = dmu_buf_get_user(dbuf); |
407 | if (ds == NULL) { | |
d4ed6673 | 408 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 409 | |
79c76d5b | 410 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
411 | ds->ds_dbuf = dbuf; |
412 | ds->ds_object = dsobj; | |
0c66c32d | 413 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 414 | list_link_init(&ds->ds_synced_link); |
34dc7c2f BB |
415 | |
416 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
417 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 418 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
13fe0198 | 419 | refcount_create(&ds->ds_longholds); |
34dc7c2f | 420 | |
428870ff BB |
421 | bplist_create(&ds->ds_pending_deadlist); |
422 | dsl_deadlist_open(&ds->ds_deadlist, | |
d683ddbb | 423 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); |
428870ff | 424 | |
37abac6d BP |
425 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
426 | offsetof(dmu_sendarg_t, dsa_link)); | |
427 | ||
f1512ee6 | 428 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
19b3b1d2 JG |
429 | int zaperr = zap_contains(mos, dsobj, |
430 | DS_FIELD_LARGE_BLOCKS); | |
431 | if (zaperr != ENOENT) { | |
432 | VERIFY0(zaperr); | |
f1512ee6 | 433 | ds->ds_large_blocks = B_TRUE; |
19b3b1d2 | 434 | } |
f1512ee6 MA |
435 | } |
436 | ||
34dc7c2f | 437 | if (err == 0) { |
13fe0198 | 438 | err = dsl_dir_hold_obj(dp, |
d683ddbb JG |
439 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, |
440 | &ds->ds_dir); | |
34dc7c2f | 441 | } |
13fe0198 | 442 | if (err != 0) { |
34dc7c2f BB |
443 | mutex_destroy(&ds->ds_lock); |
444 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 445 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 446 | refcount_destroy(&ds->ds_longholds); |
428870ff BB |
447 | bplist_destroy(&ds->ds_pending_deadlist); |
448 | dsl_deadlist_close(&ds->ds_deadlist); | |
34dc7c2f BB |
449 | kmem_free(ds, sizeof (dsl_dataset_t)); |
450 | dmu_buf_rele(dbuf, tag); | |
451 | return (err); | |
452 | } | |
453 | ||
0c66c32d | 454 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 455 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 456 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 457 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 458 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 459 | ds, &ds->ds_prev); |
34dc7c2f | 460 | } |
da536844 MA |
461 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
462 | int zaperr = zap_lookup(mos, ds->ds_object, | |
463 | DS_FIELD_BOOKMARK_NAMES, | |
464 | sizeof (ds->ds_bookmarks), 1, | |
465 | &ds->ds_bookmarks); | |
466 | if (zaperr != ENOENT) | |
467 | VERIFY0(zaperr); | |
468 | } | |
45d1cae3 BB |
469 | } else { |
470 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
471 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
472 | if (err == 0 && |
473 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
474 | err = zap_count( |
475 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 476 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
477 | &ds->ds_userrefs); |
478 | } | |
34dc7c2f BB |
479 | } |
480 | ||
0c66c32d | 481 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
482 | err = dsl_prop_get_int_ds(ds, |
483 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
484 | &ds->ds_reserved); | |
34dc7c2f | 485 | if (err == 0) { |
13fe0198 MA |
486 | err = dsl_prop_get_int_ds(ds, |
487 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
488 | &ds->ds_quota); | |
34dc7c2f | 489 | } |
34dc7c2f BB |
490 | } else { |
491 | ds->ds_reserved = ds->ds_quota = 0; | |
492 | } | |
493 | ||
0c66c32d JG |
494 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); |
495 | if (err == 0) | |
496 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
497 | ||
498 | if (err != 0 || winner != NULL) { | |
428870ff BB |
499 | bplist_destroy(&ds->ds_pending_deadlist); |
500 | dsl_deadlist_close(&ds->ds_deadlist); | |
b128c09f | 501 | if (ds->ds_prev) |
13fe0198 MA |
502 | dsl_dataset_rele(ds->ds_prev, ds); |
503 | dsl_dir_rele(ds->ds_dir, ds); | |
34dc7c2f BB |
504 | mutex_destroy(&ds->ds_lock); |
505 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 506 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 507 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f | 508 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 509 | if (err != 0) { |
34dc7c2f BB |
510 | dmu_buf_rele(dbuf, tag); |
511 | return (err); | |
512 | } | |
513 | ds = winner; | |
514 | } else { | |
515 | ds->ds_fsid_guid = | |
d683ddbb | 516 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
34dc7c2f BB |
517 | } |
518 | } | |
519 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
d683ddbb JG |
520 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
521 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
522 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
523 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f BB |
524 | *dsp = ds; |
525 | return (0); | |
526 | } | |
527 | ||
b128c09f | 528 | int |
13fe0198 | 529 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, |
428870ff | 530 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
531 | { |
532 | dsl_dir_t *dd; | |
b128c09f | 533 | const char *snapname; |
34dc7c2f | 534 | uint64_t obj; |
34dc7c2f BB |
535 | int err = 0; |
536 | ||
13fe0198 MA |
537 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
538 | if (err != 0) | |
34dc7c2f BB |
539 | return (err); |
540 | ||
13fe0198 | 541 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 542 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 MA |
543 | if (obj != 0) |
544 | err = dsl_dataset_hold_obj(dp, obj, tag, dsp); | |
b128c09f | 545 | else |
2e528b49 | 546 | err = SET_ERROR(ENOENT); |
34dc7c2f | 547 | |
b128c09f BB |
548 | /* we may be looking for a snapshot */ |
549 | if (err == 0 && snapname != NULL) { | |
13fe0198 | 550 | dsl_dataset_t *ds; |
34dc7c2f | 551 | |
b128c09f BB |
552 | if (*snapname++ != '@') { |
553 | dsl_dataset_rele(*dsp, tag); | |
13fe0198 | 554 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 555 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 556 | } |
34dc7c2f | 557 | |
b128c09f BB |
558 | dprintf("looking for snapshot '%s'\n", snapname); |
559 | err = dsl_dataset_snap_lookup(*dsp, snapname, &obj); | |
560 | if (err == 0) | |
13fe0198 | 561 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
b128c09f BB |
562 | dsl_dataset_rele(*dsp, tag); |
563 | ||
13fe0198 | 564 | if (err == 0) { |
b128c09f BB |
565 | mutex_enter(&ds->ds_lock); |
566 | if (ds->ds_snapname[0] == 0) | |
567 | (void) strlcpy(ds->ds_snapname, snapname, | |
568 | sizeof (ds->ds_snapname)); | |
569 | mutex_exit(&ds->ds_lock); | |
13fe0198 | 570 | *dsp = ds; |
34dc7c2f | 571 | } |
34dc7c2f | 572 | } |
13fe0198 MA |
573 | |
574 | dsl_dir_rele(dd, FTAG); | |
34dc7c2f BB |
575 | return (err); |
576 | } | |
577 | ||
578 | int | |
13fe0198 | 579 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, |
428870ff | 580 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 581 | { |
13fe0198 MA |
582 | int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); |
583 | if (err != 0) | |
584 | return (err); | |
585 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
586 | dsl_dataset_rele(*dsp, tag); | |
587 | *dsp = NULL; | |
2e528b49 | 588 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
589 | } |
590 | return (0); | |
591 | } | |
592 | ||
593 | int | |
594 | dsl_dataset_own(dsl_pool_t *dp, const char *name, | |
595 | void *tag, dsl_dataset_t **dsp) | |
596 | { | |
597 | int err = dsl_dataset_hold(dp, name, tag, dsp); | |
598 | if (err != 0) | |
b128c09f | 599 | return (err); |
13fe0198 | 600 | if (!dsl_dataset_tryown(*dsp, tag)) { |
428870ff | 601 | dsl_dataset_rele(*dsp, tag); |
2e528b49 | 602 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
603 | } |
604 | return (0); | |
34dc7c2f BB |
605 | } |
606 | ||
13fe0198 MA |
607 | /* |
608 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
609 | * hold is used to prevent destruction of a dataset while the pool hold | |
610 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
611 | * | |
612 | * The dataset and pool must be held when this function is called. After it | |
613 | * is called, the pool hold may be released while the dataset is still held | |
614 | * and accessed. | |
615 | */ | |
616 | void | |
617 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
618 | { | |
619 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
620 | (void) refcount_add(&ds->ds_longholds, tag); | |
621 | } | |
622 | ||
623 | void | |
624 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
625 | { | |
626 | (void) refcount_remove(&ds->ds_longholds, tag); | |
627 | } | |
628 | ||
629 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
630 | boolean_t | |
631 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
632 | { | |
633 | return (!refcount_is_zero(&ds->ds_longholds)); | |
634 | } | |
635 | ||
34dc7c2f BB |
636 | void |
637 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
638 | { | |
639 | if (ds == NULL) { | |
640 | (void) strcpy(name, "mos"); | |
641 | } else { | |
642 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 643 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f BB |
644 | if (ds->ds_snapname[0]) { |
645 | (void) strcat(name, "@"); | |
b128c09f BB |
646 | /* |
647 | * We use a "recursive" mutex so that we | |
648 | * can call dprintf_ds() with ds_lock held. | |
649 | */ | |
34dc7c2f | 650 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f BB |
651 | mutex_enter(&ds->ds_lock); |
652 | (void) strcat(name, ds->ds_snapname); | |
653 | mutex_exit(&ds->ds_lock); | |
654 | } else { | |
655 | (void) strcat(name, ds->ds_snapname); | |
656 | } | |
657 | } | |
658 | } | |
659 | } | |
660 | ||
34dc7c2f | 661 | void |
b128c09f BB |
662 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
663 | { | |
13fe0198 | 664 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
665 | } |
666 | ||
667 | void | |
428870ff | 668 | dsl_dataset_disown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 669 | { |
945dd935 JG |
670 | ASSERT3P(ds->ds_owner, ==, tag); |
671 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 672 | |
34dc7c2f | 673 | mutex_enter(&ds->ds_lock); |
b128c09f | 674 | ds->ds_owner = NULL; |
34dc7c2f | 675 | mutex_exit(&ds->ds_lock); |
13fe0198 | 676 | dsl_dataset_long_rele(ds, tag); |
945dd935 | 677 | dsl_dataset_rele(ds, tag); |
34dc7c2f BB |
678 | } |
679 | ||
680 | boolean_t | |
13fe0198 | 681 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 682 | { |
b128c09f BB |
683 | boolean_t gotit = FALSE; |
684 | ||
34dc7c2f | 685 | mutex_enter(&ds->ds_lock); |
13fe0198 | 686 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 687 | ds->ds_owner = tag; |
13fe0198 | 688 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 689 | gotit = TRUE; |
34dc7c2f BB |
690 | } |
691 | mutex_exit(&ds->ds_lock); | |
b128c09f | 692 | return (gotit); |
34dc7c2f BB |
693 | } |
694 | ||
34dc7c2f | 695 | uint64_t |
b128c09f | 696 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
34dc7c2f BB |
697 | uint64_t flags, dmu_tx_t *tx) |
698 | { | |
699 | dsl_pool_t *dp = dd->dd_pool; | |
700 | dmu_buf_t *dbuf; | |
701 | dsl_dataset_phys_t *dsphys; | |
702 | uint64_t dsobj; | |
703 | objset_t *mos = dp->dp_meta_objset; | |
704 | ||
b128c09f BB |
705 | if (origin == NULL) |
706 | origin = dp->dp_origin_snap; | |
707 | ||
34dc7c2f | 708 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 709 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 710 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 711 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
712 | |
713 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
714 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 715 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
716 | dmu_buf_will_dirty(dbuf, tx); |
717 | dsphys = dbuf->db_data; | |
b128c09f | 718 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
719 | dsphys->ds_dir_obj = dd->dd_object; |
720 | dsphys->ds_flags = flags; | |
721 | dsphys->ds_fsid_guid = unique_create(); | |
722 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
723 | sizeof (dsphys->ds_guid)); | |
724 | dsphys->ds_snapnames_zapobj = | |
725 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
726 | DMU_OT_NONE, 0, tx); | |
727 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 728 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 729 | |
428870ff BB |
730 | if (origin == NULL) { |
731 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
732 | } else { | |
13fe0198 | 733 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 734 | |
34dc7c2f BB |
735 | dsphys->ds_prev_snap_obj = origin->ds_object; |
736 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 737 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 738 | dsphys->ds_referenced_bytes = |
d683ddbb | 739 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 740 | dsphys->ds_compressed_bytes = |
d683ddbb | 741 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 742 | dsphys->ds_uncompressed_bytes = |
d683ddbb JG |
743 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
744 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; | |
4b20a6f5 MA |
745 | |
746 | /* | |
747 | * Inherit flags that describe the dataset's contents | |
748 | * (INCONSISTENT) or properties (Case Insensitive). | |
749 | */ | |
d683ddbb | 750 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 751 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 752 | |
f1512ee6 MA |
753 | if (origin->ds_large_blocks) |
754 | dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); | |
755 | ||
34dc7c2f | 756 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 757 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 758 | |
13fe0198 | 759 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
760 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
761 | FTAG, &ohds)); | |
428870ff BB |
762 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
763 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
764 | dsl_dataset_rele(ohds, FTAG); | |
765 | ||
b128c09f | 766 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
767 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
768 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
769 | zap_create(mos, |
770 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
771 | } | |
13fe0198 | 772 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
773 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
774 | dsobj, tx)); | |
b128c09f BB |
775 | } |
776 | ||
34dc7c2f | 777 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 778 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 779 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 780 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 781 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 782 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
783 | zap_create(mos, |
784 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
785 | } | |
13fe0198 | 786 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
787 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
788 | dsobj, tx)); | |
428870ff | 789 | } |
34dc7c2f BB |
790 | } |
791 | ||
792 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
793 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
794 | ||
795 | dmu_buf_rele(dbuf, FTAG); | |
796 | ||
797 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 798 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
799 | |
800 | return (dsobj); | |
801 | } | |
802 | ||
13fe0198 MA |
803 | static void |
804 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
805 | { | |
806 | objset_t *os; | |
807 | ||
808 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
809 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
810 | dsl_dataset_dirty(ds, tx); | |
811 | } | |
812 | ||
34dc7c2f BB |
813 | uint64_t |
814 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
815 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) | |
816 | { | |
817 | dsl_pool_t *dp = pdd->dd_pool; | |
818 | uint64_t dsobj, ddobj; | |
819 | dsl_dir_t *dd; | |
820 | ||
13fe0198 | 821 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
822 | ASSERT(lastname[0] != '@'); |
823 | ||
b128c09f | 824 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 825 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 826 | |
13fe0198 MA |
827 | dsobj = dsl_dataset_create_sync_dd(dd, origin, |
828 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); | |
34dc7c2f BB |
829 | |
830 | dsl_deleg_set_create_perms(dd, tx, cr); | |
831 | ||
788eb90c JJ |
832 | /* |
833 | * Since we're creating a new node we know it's a leaf, so we can | |
834 | * initialize the counts if the limit feature is active. | |
835 | */ | |
836 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
837 | uint64_t cnt = 0; | |
838 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
839 | ||
840 | dsl_dir_zapify(dd, tx); | |
841 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
842 | sizeof (cnt), 1, &cnt, tx)); | |
843 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
844 | sizeof (cnt), 1, &cnt, tx)); | |
845 | } | |
846 | ||
13fe0198 | 847 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 848 | |
572e2857 BB |
849 | /* |
850 | * If we are creating a clone, make sure we zero out any stale | |
851 | * data from the origin snapshots zil header. | |
852 | */ | |
13fe0198 | 853 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 854 | dsl_dataset_t *ds; |
572e2857 | 855 | |
13fe0198 MA |
856 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
857 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
858 | dsl_dataset_rele(ds, FTAG); |
859 | } | |
860 | ||
34dc7c2f BB |
861 | return (dsobj); |
862 | } | |
863 | ||
34dc7c2f | 864 | /* |
13fe0198 MA |
865 | * The unique space in the head dataset can be calculated by subtracting |
866 | * the space used in the most recent snapshot, that is still being used | |
867 | * in this file system, from the space currently in use. To figure out | |
868 | * the space in the most recent snapshot still in use, we need to take | |
869 | * the total space used in the snapshot and subtract out the space that | |
870 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 871 | */ |
13fe0198 MA |
872 | void |
873 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 874 | { |
13fe0198 MA |
875 | uint64_t mrs_used; |
876 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 877 | |
0c66c32d | 878 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 879 | |
d683ddbb JG |
880 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
881 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
882 | else |
883 | mrs_used = 0; | |
45d1cae3 | 884 | |
13fe0198 | 885 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 886 | |
13fe0198 | 887 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
888 | dsl_dataset_phys(ds)->ds_unique_bytes = |
889 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 890 | |
13fe0198 MA |
891 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
892 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 893 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
894 | } |
895 | ||
13fe0198 MA |
896 | void |
897 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
898 | dmu_tx_t *tx) | |
45d1cae3 | 899 | { |
13fe0198 MA |
900 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
901 | int err; | |
902 | ASSERTV(uint64_t count); | |
903 | ||
d683ddbb JG |
904 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
905 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
906 | obj, tx); | |
13fe0198 MA |
907 | /* |
908 | * The err should not be ENOENT, but a bug in a previous version | |
909 | * of the code could cause upgrade_clones_cb() to not set | |
910 | * ds_next_snap_obj when it should, leading to a missing entry. | |
911 | * If we knew that the pool was created after | |
912 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
913 | * ENOENT. However, at least we can check that we don't have | |
914 | * too many entries in the next_clones_obj even after failing to | |
915 | * remove this one. | |
916 | */ | |
917 | if (err != ENOENT) | |
918 | VERIFY0(err); | |
d683ddbb | 919 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 920 | &count)); |
d683ddbb | 921 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 922 | } |
45d1cae3 | 923 | |
45d1cae3 | 924 | |
13fe0198 MA |
925 | blkptr_t * |
926 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
927 | { | |
d683ddbb | 928 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
929 | } |
930 | ||
13fe0198 MA |
931 | void |
932 | dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
45d1cae3 | 933 | { |
13fe0198 MA |
934 | ASSERT(dmu_tx_is_syncing(tx)); |
935 | /* If it's the meta-objset, set dp_meta_rootbp */ | |
936 | if (ds == NULL) { | |
937 | tx->tx_pool->dp_meta_rootbp = *bp; | |
938 | } else { | |
939 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 940 | dsl_dataset_phys(ds)->ds_bp = *bp; |
45d1cae3 | 941 | } |
13fe0198 | 942 | } |
45d1cae3 | 943 | |
13fe0198 MA |
944 | spa_t * |
945 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
946 | { | |
947 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
948 | } |
949 | ||
13fe0198 MA |
950 | void |
951 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 952 | { |
13fe0198 | 953 | dsl_pool_t *dp; |
45d1cae3 | 954 | |
13fe0198 MA |
955 | if (ds == NULL) /* this is the meta-objset */ |
956 | return; | |
34dc7c2f | 957 | |
428870ff | 958 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 959 | |
d683ddbb | 960 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
961 | panic("dirtying snapshot!"); |
962 | ||
963 | dp = ds->ds_dir->dd_pool; | |
964 | ||
13fe0198 | 965 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
34dc7c2f BB |
966 | /* up the hold count until we can be written out */ |
967 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
968 | } | |
969 | } | |
970 | ||
04434775 MA |
971 | boolean_t |
972 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
973 | { | |
974 | int t; | |
975 | ||
976 | for (t = 0; t < TXG_SIZE; t++) { | |
977 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
978 | ds, t)) | |
979 | return (B_TRUE); | |
980 | } | |
981 | return (B_FALSE); | |
982 | } | |
983 | ||
34dc7c2f | 984 | static int |
13fe0198 | 985 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 986 | { |
13fe0198 | 987 | uint64_t asize; |
34dc7c2f | 988 | |
13fe0198 | 989 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
990 | return (0); |
991 | ||
34dc7c2f | 992 | /* |
13fe0198 MA |
993 | * If there's an fs-only reservation, any blocks that might become |
994 | * owned by the snapshot dataset must be accommodated by space | |
995 | * outside of the reservation. | |
34dc7c2f | 996 | */ |
13fe0198 | 997 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 998 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 999 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1000 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1001 | |
1002 | /* | |
13fe0198 MA |
1003 | * Propagate any reserved space for this snapshot to other |
1004 | * snapshot checks in this sync group. | |
34dc7c2f | 1005 | */ |
13fe0198 MA |
1006 | if (asize > 0) |
1007 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1008 | |
1009 | return (0); | |
1010 | } | |
1011 | ||
13fe0198 MA |
1012 | typedef struct dsl_dataset_snapshot_arg { |
1013 | nvlist_t *ddsa_snaps; | |
1014 | nvlist_t *ddsa_props; | |
1015 | nvlist_t *ddsa_errors; | |
788eb90c | 1016 | cred_t *ddsa_cr; |
13fe0198 | 1017 | } dsl_dataset_snapshot_arg_t; |
45d1cae3 | 1018 | |
34dc7c2f | 1019 | int |
13fe0198 | 1020 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1021 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1022 | { |
13fe0198 MA |
1023 | int error; |
1024 | uint64_t value; | |
34dc7c2f | 1025 | |
13fe0198 | 1026 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1027 | |
13fe0198 | 1028 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1029 | return (0); |
34dc7c2f BB |
1030 | |
1031 | /* | |
13fe0198 MA |
1032 | * We don't allow multiple snapshots of the same txg. If there |
1033 | * is already one, try again. | |
34dc7c2f | 1034 | */ |
d683ddbb | 1035 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1036 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1037 | |
1038 | /* | |
13fe0198 | 1039 | * Check for conflicting snapshot name. |
34dc7c2f | 1040 | */ |
13fe0198 MA |
1041 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1042 | if (error == 0) | |
2e528b49 | 1043 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1044 | if (error != ENOENT) |
1045 | return (error); | |
45d1cae3 | 1046 | |
96c2e961 KW |
1047 | /* |
1048 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1049 | * those into which we are currently receiving. However, if we are | |
1050 | * creating this snapshot as part of a receive, this check will be | |
1051 | * executed atomically with respect to the completion of the receive | |
1052 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1053 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1054 | * dmu_recv_end_sync(). | |
1055 | */ | |
1056 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1057 | return (SET_ERROR(EBUSY)); | |
1058 | ||
788eb90c JJ |
1059 | /* |
1060 | * Skip the check for temporary snapshots or if we have already checked | |
1061 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1062 | * check the count here when we're receiving a stream. | |
1063 | */ | |
1064 | if (cnt != 0 && cr != NULL) { | |
1065 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1066 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1067 | if (error != 0) | |
1068 | return (error); | |
1069 | } | |
1070 | ||
13fe0198 MA |
1071 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1072 | if (error != 0) | |
1073 | return (error); | |
45d1cae3 | 1074 | |
34dc7c2f BB |
1075 | return (0); |
1076 | } | |
1077 | ||
13fe0198 MA |
1078 | static int |
1079 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
b128c09f | 1080 | { |
13fe0198 MA |
1081 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1082 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1083 | nvpair_t *pair; | |
1084 | int rv = 0; | |
b128c09f | 1085 | |
788eb90c JJ |
1086 | /* |
1087 | * Pre-compute how many total new snapshots will be created for each | |
1088 | * level in the tree and below. This is needed for validating the | |
1089 | * snapshot limit when either taking a recursive snapshot or when | |
1090 | * taking multiple snapshots. | |
1091 | * | |
1092 | * The problem is that the counts are not actually adjusted when | |
1093 | * we are checking, only when we finally sync. For a single snapshot, | |
1094 | * this is easy, the count will increase by 1 at each node up the tree, | |
1095 | * but its more complicated for the recursive/multiple snapshot case. | |
1096 | * | |
1097 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1098 | * at each level up the tree but since it is validating each snapshot | |
1099 | * independently we need to be sure that we are validating the complete | |
1100 | * count for the entire set of snapshots. We do this by rolling up the | |
1101 | * counts for each component of the name into an nvlist and then | |
1102 | * checking each of those cases with the aggregated count. | |
1103 | * | |
1104 | * This approach properly handles not only the recursive snapshot | |
1105 | * case (where we get all of those on the ddsa_snaps list) but also | |
1106 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1107 | * validate the limit on 'a' using a count of 2). | |
1108 | * | |
1109 | * We validate the snapshot names in the third loop and only report | |
1110 | * name errors once. | |
1111 | */ | |
1112 | if (dmu_tx_is_syncing(tx)) { | |
1113 | char *nm; | |
1114 | nvlist_t *cnt_track = NULL; | |
1115 | cnt_track = fnvlist_alloc(); | |
1116 | ||
1117 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1118 | ||
1119 | /* Rollup aggregated counts into the cnt_track list */ | |
1120 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1121 | pair != NULL; | |
1122 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1123 | char *pdelim; | |
1124 | uint64_t val; | |
1125 | ||
1126 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1127 | pdelim = strchr(nm, '@'); | |
1128 | if (pdelim == NULL) | |
1129 | continue; | |
1130 | *pdelim = '\0'; | |
1131 | ||
1132 | do { | |
1133 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1134 | &val) == 0) { | |
1135 | /* update existing entry */ | |
1136 | fnvlist_add_uint64(cnt_track, nm, | |
1137 | val + 1); | |
1138 | } else { | |
1139 | /* add to list */ | |
1140 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1141 | } | |
1142 | ||
1143 | pdelim = strrchr(nm, '/'); | |
1144 | if (pdelim != NULL) | |
1145 | *pdelim = '\0'; | |
1146 | } while (pdelim != NULL); | |
1147 | } | |
1148 | ||
1149 | kmem_free(nm, MAXPATHLEN); | |
1150 | ||
1151 | /* Check aggregated counts at each level */ | |
1152 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1153 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1154 | int error = 0; | |
1155 | char *name; | |
1156 | uint64_t cnt = 0; | |
1157 | dsl_dataset_t *ds; | |
1158 | ||
1159 | name = nvpair_name(pair); | |
1160 | cnt = fnvpair_value_uint64(pair); | |
1161 | ASSERT(cnt > 0); | |
1162 | ||
1163 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1164 | if (error == 0) { | |
1165 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1166 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1167 | ddsa->ddsa_cr); | |
1168 | dsl_dataset_rele(ds, FTAG); | |
1169 | } | |
1170 | ||
1171 | if (error != 0) { | |
1172 | if (ddsa->ddsa_errors != NULL) | |
1173 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1174 | name, error); | |
1175 | rv = error; | |
1176 | /* only report one error for this check */ | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | nvlist_free(cnt_track); | |
1181 | } | |
1182 | ||
13fe0198 MA |
1183 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1184 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1185 | int error = 0; | |
1186 | dsl_dataset_t *ds; | |
1187 | char *name, *atp; | |
1188 | char dsname[MAXNAMELEN]; | |
1189 | ||
1190 | name = nvpair_name(pair); | |
1191 | if (strlen(name) >= MAXNAMELEN) | |
2e528b49 | 1192 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1193 | if (error == 0) { |
1194 | atp = strchr(name, '@'); | |
1195 | if (atp == NULL) | |
2e528b49 | 1196 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1197 | if (error == 0) |
1198 | (void) strlcpy(dsname, name, atp - name + 1); | |
1199 | } | |
1200 | if (error == 0) | |
1201 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1202 | if (error == 0) { | |
788eb90c | 1203 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1204 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1205 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1206 | dsl_dataset_rele(ds, FTAG); |
1207 | } | |
b128c09f | 1208 | |
13fe0198 MA |
1209 | if (error != 0) { |
1210 | if (ddsa->ddsa_errors != NULL) { | |
1211 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1212 | name, error); | |
1213 | } | |
1214 | rv = error; | |
1215 | } | |
1216 | } | |
788eb90c | 1217 | |
13fe0198 | 1218 | return (rv); |
b128c09f BB |
1219 | } |
1220 | ||
13fe0198 MA |
1221 | void |
1222 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1223 | dmu_tx_t *tx) | |
428870ff | 1224 | { |
13fe0198 MA |
1225 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1226 | dmu_buf_t *dbuf; | |
1227 | dsl_dataset_phys_t *dsphys; | |
1228 | uint64_t dsobj, crtxg; | |
1229 | objset_t *mos = dp->dp_meta_objset; | |
1230 | ASSERTV(static zil_header_t zero_zil); | |
1231 | ASSERTV(objset_t *os); | |
1232 | ||
1233 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1234 | |
428870ff | 1235 | /* |
13fe0198 MA |
1236 | * If we are on an old pool, the zil must not be active, in which |
1237 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1238 | */ |
13fe0198 MA |
1239 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1240 | dmu_objset_from_ds(ds, &os) != 0 || | |
1241 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1242 | sizeof (zero_zil)) == 0); | |
428870ff | 1243 | |
788eb90c | 1244 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1245 | |
1246 | /* | |
13fe0198 | 1247 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1248 | */ |
1249 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1250 | crtxg = 1; | |
1251 | else | |
1252 | crtxg = tx->tx_txg; | |
1253 | ||
34dc7c2f BB |
1254 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1255 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1256 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1257 | dmu_buf_will_dirty(dbuf, tx); |
1258 | dsphys = dbuf->db_data; | |
b128c09f | 1259 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1260 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1261 | dsphys->ds_fsid_guid = unique_create(); | |
1262 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1263 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1264 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1265 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1266 | dsphys->ds_next_snap_obj = ds->ds_object; |
1267 | dsphys->ds_num_children = 1; | |
1268 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1269 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1270 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1271 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1272 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1273 | dsphys->ds_uncompressed_bytes = | |
1274 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1275 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
1276 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; | |
34dc7c2f BB |
1277 | dmu_buf_rele(dbuf, FTAG); |
1278 | ||
f1512ee6 MA |
1279 | if (ds->ds_large_blocks) |
1280 | dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); | |
1281 | ||
d683ddbb JG |
1282 | ASSERT3U(ds->ds_prev != 0, ==, |
1283 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1284 | if (ds->ds_prev) { |
b128c09f | 1285 | uint64_t next_clones_obj = |
d683ddbb JG |
1286 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1287 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1288 | ds->ds_object || |
d683ddbb JG |
1289 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1290 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1291 | ds->ds_object) { | |
34dc7c2f | 1292 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1293 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1294 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1295 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1296 | } else if (next_clones_obj != 0) { |
13fe0198 | 1297 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1298 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1299 | VERIFY0(zap_add_int(mos, |
b128c09f | 1300 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1301 | } |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * If we have a reference-reservation on this dataset, we will | |
1306 | * need to increase the amount of refreservation being charged | |
1307 | * since our unique space is going to zero. | |
1308 | */ | |
1309 | if (ds->ds_reserved) { | |
428870ff BB |
1310 | int64_t delta; |
1311 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1312 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1313 | ds->ds_reserved); | |
b128c09f | 1314 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1315 | delta, 0, 0, tx); |
34dc7c2f BB |
1316 | } |
1317 | ||
34dc7c2f | 1318 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1319 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1320 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1321 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1322 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1323 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1324 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1325 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1326 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1327 | |
d683ddbb JG |
1328 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1329 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1330 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1331 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
34dc7c2f | 1332 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1333 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1334 | |
d683ddbb | 1335 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1336 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1337 | |
1338 | if (ds->ds_prev) | |
13fe0198 MA |
1339 | dsl_dataset_rele(ds->ds_prev, ds); |
1340 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1341 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1342 | |
428870ff BB |
1343 | dsl_scan_ds_snapshotted(ds, tx); |
1344 | ||
1345 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1346 | |
6f1ffb06 | 1347 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1348 | } |
1349 | ||
13fe0198 MA |
1350 | static void |
1351 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1352 | { |
13fe0198 MA |
1353 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1354 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1355 | nvpair_t *pair; | |
34dc7c2f | 1356 | |
13fe0198 MA |
1357 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1358 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1359 | dsl_dataset_t *ds; | |
1360 | char *name, *atp; | |
1361 | char dsname[MAXNAMELEN]; | |
1362 | ||
1363 | name = nvpair_name(pair); | |
1364 | atp = strchr(name, '@'); | |
1365 | (void) strlcpy(dsname, name, atp - name + 1); | |
1366 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1367 | ||
1368 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1369 | if (ddsa->ddsa_props != NULL) { | |
1370 | dsl_props_set_sync_impl(ds->ds_prev, | |
1371 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1372 | } | |
1373 | dsl_dataset_rele(ds, FTAG); | |
1374 | } | |
34dc7c2f BB |
1375 | } |
1376 | ||
13fe0198 MA |
1377 | /* |
1378 | * The snapshots must all be in the same pool. | |
1379 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1380 | */ | |
1381 | int | |
1382 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1383 | { |
13fe0198 MA |
1384 | dsl_dataset_snapshot_arg_t ddsa; |
1385 | nvpair_t *pair; | |
1386 | boolean_t needsuspend; | |
1387 | int error; | |
1388 | spa_t *spa; | |
1389 | char *firstname; | |
1390 | nvlist_t *suspended = NULL; | |
330d06f9 | 1391 | |
13fe0198 MA |
1392 | pair = nvlist_next_nvpair(snaps, NULL); |
1393 | if (pair == NULL) | |
1394 | return (0); | |
1395 | firstname = nvpair_name(pair); | |
1396 | ||
1397 | error = spa_open(firstname, &spa, FTAG); | |
1398 | if (error != 0) | |
1399 | return (error); | |
1400 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1401 | spa_close(spa, FTAG); | |
1402 | ||
1403 | if (needsuspend) { | |
1404 | suspended = fnvlist_alloc(); | |
1405 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1406 | pair = nvlist_next_nvpair(snaps, pair)) { | |
1407 | char fsname[MAXNAMELEN]; | |
1408 | char *snapname = nvpair_name(pair); | |
1409 | char *atp; | |
1410 | void *cookie; | |
1411 | ||
1412 | atp = strchr(snapname, '@'); | |
1413 | if (atp == NULL) { | |
2e528b49 | 1414 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1415 | break; |
1416 | } | |
1417 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1418 | ||
1419 | error = zil_suspend(fsname, &cookie); | |
1420 | if (error != 0) | |
1421 | break; | |
1422 | fnvlist_add_uint64(suspended, fsname, | |
1423 | (uintptr_t)cookie); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | ddsa.ddsa_snaps = snaps; | |
1428 | ddsa.ddsa_props = props; | |
1429 | ddsa.ddsa_errors = errors; | |
788eb90c | 1430 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1431 | |
1432 | if (error == 0) { | |
1433 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1434 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1435 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1436 | } |
1437 | ||
1438 | if (suspended != NULL) { | |
1439 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1440 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1441 | zil_resume((void *)(uintptr_t) | |
1442 | fnvpair_value_uint64(pair)); | |
1443 | } | |
1444 | fnvlist_free(suspended); | |
1445 | } | |
1446 | ||
ba6a2402 BB |
1447 | #ifdef _KERNEL |
1448 | if (error == 0) { | |
1449 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
d1d7e268 | 1450 | pair = nvlist_next_nvpair(snaps, pair)) { |
ba6a2402 BB |
1451 | char *snapname = nvpair_name(pair); |
1452 | zvol_create_minors(snapname); | |
1453 | } | |
1454 | } | |
1455 | #endif | |
1456 | ||
13fe0198 MA |
1457 | return (error); |
1458 | } | |
1459 | ||
1460 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1461 | const char *ddsta_fsname; | |
1462 | const char *ddsta_snapname; | |
1463 | minor_t ddsta_cleanup_minor; | |
1464 | const char *ddsta_htag; | |
1465 | } dsl_dataset_snapshot_tmp_arg_t; | |
1466 | ||
1467 | static int | |
1468 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1469 | { | |
1470 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1471 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1472 | dsl_dataset_t *ds; | |
1473 | int error; | |
1474 | ||
1475 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1476 | if (error != 0) | |
1477 | return (error); | |
1478 | ||
788eb90c | 1479 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1480 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1481 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1482 | if (error != 0) { |
1483 | dsl_dataset_rele(ds, FTAG); | |
1484 | return (error); | |
1485 | } | |
1486 | ||
1487 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1488 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1489 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1490 | } |
1491 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1492 | B_TRUE, tx); | |
1493 | if (error != 0) { | |
1494 | dsl_dataset_rele(ds, FTAG); | |
1495 | return (error); | |
1496 | } | |
1497 | ||
1498 | dsl_dataset_rele(ds, FTAG); | |
1499 | return (0); | |
1500 | } | |
1501 | ||
1502 | static void | |
1503 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1504 | { | |
1505 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1506 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1507 | dsl_dataset_t *ds; | |
1508 | ||
1509 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1510 | ||
1511 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1512 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1513 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1514 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1515 | ||
1516 | dsl_dataset_rele(ds, FTAG); | |
1517 | } | |
1518 | ||
1519 | int | |
1520 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1521 | minor_t cleanup_minor, const char *htag) | |
1522 | { | |
1523 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1524 | int error; | |
1525 | spa_t *spa; | |
1526 | boolean_t needsuspend; | |
1527 | void *cookie; | |
1528 | ||
1529 | ddsta.ddsta_fsname = fsname; | |
1530 | ddsta.ddsta_snapname = snapname; | |
1531 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1532 | ddsta.ddsta_htag = htag; | |
1533 | ||
1534 | error = spa_open(fsname, &spa, FTAG); | |
1535 | if (error != 0) | |
1536 | return (error); | |
1537 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1538 | spa_close(spa, FTAG); | |
1539 | ||
1540 | if (needsuspend) { | |
1541 | error = zil_suspend(fsname, &cookie); | |
1542 | if (error != 0) | |
1543 | return (error); | |
1544 | } | |
1545 | ||
1546 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1547 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1548 | |
1549 | if (needsuspend) | |
1550 | zil_resume(cookie); | |
1551 | return (error); | |
1552 | } | |
1553 | ||
1554 | ||
1555 | void | |
1556 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1557 | { | |
1558 | ASSERT(dmu_tx_is_syncing(tx)); | |
1559 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1560 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1561 | |
1562 | /* | |
1563 | * in case we had to change ds_fsid_guid when we opened it, | |
1564 | * sync it out now. | |
1565 | */ | |
1566 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1567 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 MA |
1568 | |
1569 | dmu_objset_sync(ds->ds_objset, zio, tx); | |
f1512ee6 MA |
1570 | |
1571 | if (ds->ds_need_large_blocks && !ds->ds_large_blocks) { | |
1572 | dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); | |
1573 | ds->ds_large_blocks = B_TRUE; | |
1574 | } | |
13fe0198 MA |
1575 | } |
1576 | ||
1577 | static void | |
1578 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1579 | { | |
1580 | uint64_t count = 0; | |
1581 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1582 | zap_cursor_t zc; | |
1583 | zap_attribute_t za; | |
1584 | nvlist_t *propval = fnvlist_alloc(); | |
1585 | nvlist_t *val = fnvlist_alloc(); | |
1586 | ||
1587 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
1588 | |
1589 | /* | |
13fe0198 | 1590 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
1591 | * due to a bug in a previous version of the code. |
1592 | * Only trust it if it has the right number of entries. | |
1593 | */ | |
d683ddbb JG |
1594 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
1595 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
1596 | &count)); |
1597 | } | |
d683ddbb | 1598 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) |
330d06f9 | 1599 | goto fail; |
d683ddbb JG |
1600 | for (zap_cursor_init(&zc, mos, |
1601 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
1602 | zap_cursor_retrieve(&zc, &za) == 0; |
1603 | zap_cursor_advance(&zc)) { | |
1604 | dsl_dataset_t *clone; | |
1605 | char buf[ZFS_MAXNAMELEN]; | |
13fe0198 MA |
1606 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1607 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 1608 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 1609 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
1610 | dsl_dataset_rele(clone, FTAG); |
1611 | } | |
1612 | zap_cursor_fini(&zc); | |
13fe0198 MA |
1613 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); |
1614 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
330d06f9 MA |
1615 | fail: |
1616 | nvlist_free(val); | |
1617 | nvlist_free(propval); | |
330d06f9 MA |
1618 | } |
1619 | ||
34dc7c2f BB |
1620 | void |
1621 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1622 | { | |
f5fc4aca | 1623 | uint64_t refd, avail, uobjs, aobjs, ratio; |
13fe0198 MA |
1624 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
1625 | ||
1626 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 1627 | |
d683ddbb JG |
1628 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : |
1629 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1630 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
6f1ffb06 MA |
1631 | |
1632 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
24a64651 | 1633 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d683ddbb | 1634 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); |
6f1ffb06 | 1635 | |
0c66c32d | 1636 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
1637 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); |
1638 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
d683ddbb | 1639 | dsl_dataset_phys(ds)->ds_unique_bytes); |
6f1ffb06 MA |
1640 | get_clones_stat(ds, nv); |
1641 | } else { | |
1642 | dsl_dir_stats(ds->ds_dir, nv); | |
1643 | } | |
34dc7c2f BB |
1644 | |
1645 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1646 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1647 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1648 | ||
1649 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
d683ddbb | 1650 | dsl_dataset_phys(ds)->ds_creation_time); |
34dc7c2f | 1651 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d683ddbb | 1652 | dsl_dataset_phys(ds)->ds_creation_txg); |
34dc7c2f BB |
1653 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
1654 | ds->ds_quota); | |
1655 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1656 | ds->ds_reserved); | |
b128c09f | 1657 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d683ddbb | 1658 | dsl_dataset_phys(ds)->ds_guid); |
428870ff | 1659 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d683ddbb | 1660 | dsl_dataset_phys(ds)->ds_unique_bytes); |
428870ff BB |
1661 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
1662 | ds->ds_object); | |
1663 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1664 | ds->ds_userrefs); | |
45d1cae3 BB |
1665 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
1666 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
34dc7c2f | 1667 | |
d683ddbb | 1668 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
330d06f9 MA |
1669 | uint64_t written, comp, uncomp; |
1670 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1671 | dsl_dataset_t *prev; | |
1672 | int err; | |
1673 | ||
330d06f9 | 1674 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 1675 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); |
330d06f9 MA |
1676 | if (err == 0) { |
1677 | err = dsl_dataset_space_written(prev, ds, &written, | |
1678 | &comp, &uncomp); | |
1679 | dsl_dataset_rele(prev, FTAG); | |
1680 | if (err == 0) { | |
1681 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1682 | written); | |
1683 | } | |
1684 | } | |
1685 | } | |
1686 | ||
34dc7c2f BB |
1687 | } |
1688 | ||
1689 | void | |
1690 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1691 | { | |
13fe0198 MA |
1692 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1693 | ASSERT(dsl_pool_config_held(dp)); | |
1694 | ||
d683ddbb JG |
1695 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; |
1696 | stat->dds_inconsistent = | |
1697 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1698 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
6f1ffb06 | 1699 | stat->dds_origin[0] = '\0'; |
0c66c32d | 1700 | if (ds->ds_is_snapshot) { |
34dc7c2f | 1701 | stat->dds_is_snapshot = B_TRUE; |
d683ddbb JG |
1702 | stat->dds_num_clones = |
1703 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
fb5f0bc8 BB |
1704 | } else { |
1705 | stat->dds_is_snapshot = B_FALSE; | |
1706 | stat->dds_num_clones = 0; | |
34dc7c2f | 1707 | |
6f1ffb06 MA |
1708 | if (dsl_dir_is_clone(ds->ds_dir)) { |
1709 | dsl_dataset_t *ods; | |
34dc7c2f | 1710 | |
13fe0198 | 1711 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1712 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, |
1713 | FTAG, &ods)); | |
6f1ffb06 | 1714 | dsl_dataset_name(ods, stat->dds_origin); |
13fe0198 | 1715 | dsl_dataset_rele(ods, FTAG); |
6f1ffb06 | 1716 | } |
34dc7c2f | 1717 | } |
34dc7c2f BB |
1718 | } |
1719 | ||
1720 | uint64_t | |
1721 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1722 | { | |
1723 | return (ds->ds_fsid_guid); | |
1724 | } | |
1725 | ||
1726 | void | |
1727 | dsl_dataset_space(dsl_dataset_t *ds, | |
1728 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
1729 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
1730 | { | |
d683ddbb | 1731 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 1732 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
1733 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
1734 | *availbytesp += | |
1735 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
1736 | if (ds->ds_quota != 0) { |
1737 | /* | |
1738 | * Adjust available bytes according to refquota | |
1739 | */ | |
1740 | if (*refdbytesp < ds->ds_quota) | |
1741 | *availbytesp = MIN(*availbytesp, | |
1742 | ds->ds_quota - *refdbytesp); | |
1743 | else | |
1744 | *availbytesp = 0; | |
1745 | } | |
d683ddbb | 1746 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
34dc7c2f BB |
1747 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
1748 | } | |
1749 | ||
1750 | boolean_t | |
19580676 | 1751 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 1752 | { |
19580676 MA |
1753 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
1754 | if (snap == NULL) | |
34dc7c2f | 1755 | return (B_FALSE); |
d683ddbb JG |
1756 | if (dsl_dataset_phys(ds)->ds_bp.blk_birth > |
1757 | dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 1758 | objset_t *os, *os_snap; |
572e2857 BB |
1759 | /* |
1760 | * It may be that only the ZIL differs, because it was | |
1761 | * reset in the head. Don't count that as being | |
1762 | * modified. | |
1763 | */ | |
1764 | if (dmu_objset_from_ds(ds, &os) != 0) | |
1765 | return (B_TRUE); | |
19580676 | 1766 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
1767 | return (B_TRUE); |
1768 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 1769 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
1770 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
1771 | } | |
34dc7c2f BB |
1772 | return (B_FALSE); |
1773 | } | |
1774 | ||
13fe0198 MA |
1775 | typedef struct dsl_dataset_rename_snapshot_arg { |
1776 | const char *ddrsa_fsname; | |
1777 | const char *ddrsa_oldsnapname; | |
1778 | const char *ddrsa_newsnapname; | |
1779 | boolean_t ddrsa_recursive; | |
1780 | dmu_tx_t *ddrsa_tx; | |
1781 | } dsl_dataset_rename_snapshot_arg_t; | |
1782 | ||
34dc7c2f BB |
1783 | /* ARGSUSED */ |
1784 | static int | |
13fe0198 MA |
1785 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
1786 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 1787 | { |
13fe0198 MA |
1788 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1789 | int error; | |
34dc7c2f | 1790 | uint64_t val; |
34dc7c2f | 1791 | |
13fe0198 MA |
1792 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
1793 | if (error != 0) { | |
1794 | /* ignore nonexistent snapshots */ | |
1795 | return (error == ENOENT ? 0 : error); | |
1796 | } | |
34dc7c2f | 1797 | |
13fe0198 MA |
1798 | /* new name should not exist */ |
1799 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
1800 | if (error == 0) | |
2e528b49 | 1801 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
1802 | else if (error == ENOENT) |
1803 | error = 0; | |
34dc7c2f BB |
1804 | |
1805 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 MA |
1806 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
1807 | strlen(ddrsa->ddrsa_newsnapname) >= MAXNAMELEN) | |
2e528b49 | 1808 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 1809 | |
13fe0198 | 1810 | return (error); |
34dc7c2f BB |
1811 | } |
1812 | ||
13fe0198 MA |
1813 | static int |
1814 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1815 | { |
13fe0198 MA |
1816 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1817 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 1818 | dsl_dataset_t *hds; |
13fe0198 | 1819 | int error; |
34dc7c2f | 1820 | |
13fe0198 MA |
1821 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
1822 | if (error != 0) | |
1823 | return (error); | |
34dc7c2f | 1824 | |
13fe0198 MA |
1825 | if (ddrsa->ddrsa_recursive) { |
1826 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
1827 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
1828 | DS_FIND_CHILDREN); | |
1829 | } else { | |
1830 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
1831 | } | |
b128c09f | 1832 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 1833 | return (error); |
34dc7c2f BB |
1834 | } |
1835 | ||
34dc7c2f | 1836 | static int |
13fe0198 MA |
1837 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
1838 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 1839 | { |
13fe0198 MA |
1840 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1841 | dsl_dataset_t *ds; | |
1842 | uint64_t val; | |
1843 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
1844 | int error; | |
34dc7c2f | 1845 | |
13fe0198 MA |
1846 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
1847 | ASSERT(error == 0 || error == ENOENT); | |
1848 | if (error == ENOENT) { | |
1849 | /* ignore nonexistent snapshots */ | |
1850 | return (0); | |
34dc7c2f BB |
1851 | } |
1852 | ||
13fe0198 MA |
1853 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
1854 | ||
1855 | /* log before we change the name */ | |
1856 | spa_history_log_internal_ds(ds, "rename", tx, | |
1857 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 1858 | |
788eb90c JJ |
1859 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
1860 | B_FALSE)); | |
13fe0198 MA |
1861 | mutex_enter(&ds->ds_lock); |
1862 | (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); | |
1863 | mutex_exit(&ds->ds_lock); | |
d683ddbb JG |
1864 | VERIFY0(zap_add(dp->dp_meta_objset, |
1865 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 1866 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
34dc7c2f | 1867 | |
13fe0198 | 1868 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
1869 | return (0); |
1870 | } | |
1871 | ||
13fe0198 MA |
1872 | static void |
1873 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1874 | { |
13fe0198 MA |
1875 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1876 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1877 | dsl_dataset_t *hds; | |
34dc7c2f | 1878 | |
13fe0198 MA |
1879 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
1880 | ddrsa->ddrsa_tx = tx; | |
1881 | if (ddrsa->ddrsa_recursive) { | |
1882 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
1883 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
1884 | DS_FIND_CHILDREN)); | |
1885 | } else { | |
1886 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 1887 | } |
13fe0198 | 1888 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
1889 | } |
1890 | ||
13fe0198 MA |
1891 | int |
1892 | dsl_dataset_rename_snapshot(const char *fsname, | |
1893 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 1894 | { |
2078f210 SS |
1895 | #ifdef _KERNEL |
1896 | char *oldname, *newname; | |
1897 | #endif | |
1898 | int error; | |
1899 | ||
13fe0198 | 1900 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 1901 | |
13fe0198 MA |
1902 | ddrsa.ddrsa_fsname = fsname; |
1903 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
1904 | ddrsa.ddrsa_newsnapname = newsnapname; | |
1905 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 1906 | |
2078f210 | 1907 | error = dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 MA |
1908 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
1909 | 1, ZFS_SPACE_CHECK_RESERVED); | |
2078f210 SS |
1910 | |
1911 | if (error) | |
1912 | return (SET_ERROR(error)); | |
1913 | ||
1914 | #ifdef _KERNEL | |
1915 | oldname = kmem_asprintf("%s@%s", fsname, oldsnapname); | |
1916 | newname = kmem_asprintf("%s@%s", fsname, newsnapname); | |
1917 | zvol_rename_minors(oldname, newname); | |
1918 | strfree(newname); | |
1919 | strfree(oldname); | |
1920 | #endif | |
1921 | ||
1922 | return (0); | |
34dc7c2f BB |
1923 | } |
1924 | ||
831baf06 KW |
1925 | /* |
1926 | * If we're doing an ownership handoff, we need to make sure that there is | |
1927 | * only one long hold on the dataset. We're not allowed to change anything here | |
1928 | * so we don't permanently release the long hold or regular hold here. We want | |
1929 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
1930 | * when we release the long hold. | |
1931 | */ | |
1932 | static int | |
1933 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
1934 | { | |
1935 | boolean_t held; | |
1936 | ||
1937 | if (!dmu_tx_is_syncing(tx)) | |
1938 | return (0); | |
1939 | ||
1940 | if (owner != NULL) { | |
1941 | VERIFY3P(ds->ds_owner, ==, owner); | |
1942 | dsl_dataset_long_rele(ds, owner); | |
1943 | } | |
1944 | ||
1945 | held = dsl_dataset_long_held(ds); | |
1946 | ||
1947 | if (owner != NULL) | |
1948 | dsl_dataset_long_hold(ds, owner); | |
1949 | ||
1950 | if (held) | |
1951 | return (SET_ERROR(EBUSY)); | |
1952 | ||
1953 | return (0); | |
1954 | } | |
1955 | ||
1956 | typedef struct dsl_dataset_rollback_arg { | |
1957 | const char *ddra_fsname; | |
1958 | void *ddra_owner; | |
46ba1e59 | 1959 | nvlist_t *ddra_result; |
831baf06 KW |
1960 | } dsl_dataset_rollback_arg_t; |
1961 | ||
13fe0198 MA |
1962 | static int |
1963 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1964 | { |
831baf06 | 1965 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 1966 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 1967 | dsl_dataset_t *ds; |
13fe0198 MA |
1968 | int64_t unused_refres_delta; |
1969 | int error; | |
da536844 MA |
1970 | nvpair_t *pair; |
1971 | nvlist_t *proprequest, *bookmarks; | |
34dc7c2f | 1972 | |
831baf06 | 1973 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
1974 | if (error != 0) |
1975 | return (error); | |
428870ff | 1976 | |
13fe0198 | 1977 | /* must not be a snapshot */ |
0c66c32d | 1978 | if (ds->ds_is_snapshot) { |
13fe0198 | 1979 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 1980 | return (SET_ERROR(EINVAL)); |
13fe0198 | 1981 | } |
34dc7c2f | 1982 | |
13fe0198 | 1983 | /* must have a most recent snapshot */ |
d683ddbb | 1984 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 1985 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 1986 | return (SET_ERROR(EINVAL)); |
13fe0198 | 1987 | } |
34dc7c2f | 1988 | |
da536844 | 1989 | /* must not have any bookmarks after the most recent snapshot */ |
79c76d5b | 1990 | proprequest = fnvlist_alloc(); |
da536844 | 1991 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
79c76d5b | 1992 | bookmarks = fnvlist_alloc(); |
da536844 MA |
1993 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
1994 | fnvlist_free(proprequest); | |
1995 | if (error != 0) | |
1996 | return (error); | |
1997 | for (pair = nvlist_next_nvpair(bookmarks, NULL); | |
1998 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { | |
1999 | nvlist_t *valuenv = | |
2000 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2001 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2002 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2003 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2004 | fnvlist_free(bookmarks); |
2005 | dsl_dataset_rele(ds, FTAG); | |
2006 | return (SET_ERROR(EEXIST)); | |
2007 | } | |
2008 | } | |
2009 | fnvlist_free(bookmarks); | |
2010 | ||
831baf06 KW |
2011 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2012 | if (error != 0) { | |
13fe0198 | 2013 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2014 | return (error); |
34dc7c2f | 2015 | } |
428870ff | 2016 | |
13fe0198 MA |
2017 | /* |
2018 | * Check if the snap we are rolling back to uses more than | |
2019 | * the refquota. | |
2020 | */ | |
2021 | if (ds->ds_quota != 0 && | |
d683ddbb | 2022 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2023 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2024 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2025 | } |
2026 | ||
13fe0198 MA |
2027 | /* |
2028 | * When we do the clone swap, we will temporarily use more space | |
2029 | * due to the refreservation (the head will no longer have any | |
2030 | * unique space, so the entire amount of the refreservation will need | |
2031 | * to be free). We will immediately destroy the clone, freeing | |
2032 | * this space, but the freeing happens over many txg's. | |
2033 | */ | |
2034 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2035 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2036 | |
13fe0198 MA |
2037 | if (unused_refres_delta > 0 && |
2038 | unused_refres_delta > | |
2039 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2040 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2041 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2042 | } |
34dc7c2f | 2043 | |
13fe0198 MA |
2044 | dsl_dataset_rele(ds, FTAG); |
2045 | return (0); | |
2046 | } | |
34dc7c2f | 2047 | |
13fe0198 MA |
2048 | static void |
2049 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2050 | { | |
831baf06 | 2051 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2052 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2053 | dsl_dataset_t *ds, *clone; | |
2054 | uint64_t cloneobj; | |
46ba1e59 | 2055 | char namebuf[ZFS_MAXNAMELEN]; |
34dc7c2f | 2056 | |
831baf06 | 2057 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2058 | |
46ba1e59 MA |
2059 | dsl_dataset_name(ds->ds_prev, namebuf); |
2060 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2061 | ||
13fe0198 MA |
2062 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
2063 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); | |
2064 | ||
2065 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2066 | ||
2067 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2068 | dsl_dataset_zero_zil(ds, tx); | |
2069 | ||
2070 | dsl_destroy_head_sync_impl(clone, tx); | |
2071 | ||
2072 | dsl_dataset_rele(clone, FTAG); | |
2073 | dsl_dataset_rele(ds, FTAG); | |
2074 | } | |
2075 | ||
831baf06 | 2076 | /* |
46ba1e59 MA |
2077 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2078 | * The name of the most recent snapshot will be returned under key "target" | |
2079 | * in the result nvlist. | |
831baf06 | 2080 | * |
46ba1e59 | 2081 | * If owner != NULL: |
831baf06 KW |
2082 | * - The existing dataset MUST be owned by the specified owner at entry |
2083 | * - Upon return, dataset will still be held by the same owner, whether we | |
2084 | * succeed or not. | |
2085 | * | |
2086 | * This mode is required any time the existing filesystem is mounted. See | |
2087 | * notes above zfs_suspend_fs() for further details. | |
2088 | */ | |
13fe0198 | 2089 | int |
46ba1e59 | 2090 | dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) |
13fe0198 | 2091 | { |
831baf06 KW |
2092 | dsl_dataset_rollback_arg_t ddra; |
2093 | ||
2094 | ddra.ddra_fsname = fsname; | |
2095 | ddra.ddra_owner = owner; | |
46ba1e59 | 2096 | ddra.ddra_result = result; |
831baf06 | 2097 | |
13fe0198 | 2098 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
2099 | dsl_dataset_rollback_sync, &ddra, |
2100 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2101 | } |
2102 | ||
b128c09f BB |
2103 | struct promotenode { |
2104 | list_node_t link; | |
2105 | dsl_dataset_t *ds; | |
2106 | }; | |
2107 | ||
13fe0198 MA |
2108 | typedef struct dsl_dataset_promote_arg { |
2109 | const char *ddpa_clonename; | |
2110 | dsl_dataset_t *ddpa_clone; | |
b128c09f | 2111 | list_t shared_snaps, origin_snaps, clone_snaps; |
13fe0198 | 2112 | dsl_dataset_t *origin_origin; /* origin of the origin */ |
b128c09f | 2113 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; |
428870ff | 2114 | char *err_ds; |
788eb90c | 2115 | cred_t *cr; |
13fe0198 | 2116 | } dsl_dataset_promote_arg_t; |
34dc7c2f | 2117 | |
b128c09f | 2118 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
2119 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
2120 | void *tag); | |
2121 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 2122 | |
34dc7c2f | 2123 | static int |
13fe0198 | 2124 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2125 | { |
13fe0198 MA |
2126 | dsl_dataset_promote_arg_t *ddpa = arg; |
2127 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2128 | dsl_dataset_t *hds; | |
2129 | struct promotenode *snap; | |
2130 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 2131 | int err; |
428870ff | 2132 | uint64_t unused; |
788eb90c | 2133 | uint64_t ss_mv_cnt; |
fec41709 | 2134 | size_t max_snap_len; |
34dc7c2f | 2135 | |
13fe0198 MA |
2136 | err = promote_hold(ddpa, dp, FTAG); |
2137 | if (err != 0) | |
2138 | return (err); | |
34dc7c2f | 2139 | |
13fe0198 | 2140 | hds = ddpa->ddpa_clone; |
fec41709 | 2141 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 2142 | |
d683ddbb | 2143 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 2144 | promote_rele(ddpa, FTAG); |
2e528b49 | 2145 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
2146 | } |
2147 | ||
2148 | /* | |
2149 | * Compute and check the amount of space to transfer. Since this is | |
2150 | * so expensive, don't do the preliminary check. | |
2151 | */ | |
2152 | if (!dmu_tx_is_syncing(tx)) { | |
2153 | promote_rele(ddpa, FTAG); | |
2154 | return (0); | |
2155 | } | |
2156 | ||
2157 | snap = list_head(&ddpa->shared_snaps); | |
2158 | origin_ds = snap->ds; | |
34dc7c2f BB |
2159 | |
2160 | /* compute origin's new unique space */ | |
13fe0198 | 2161 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2162 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2163 | origin_ds->ds_object); | |
428870ff | 2164 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 2165 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 2166 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 2167 | |
b128c09f BB |
2168 | /* |
2169 | * Walk the snapshots that we are moving | |
2170 | * | |
2171 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 2172 | * to used by each snapshot: |
b128c09f BB |
2173 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
2174 | * So each snapshot gave birth to: | |
2175 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2176 | * So a sequence would look like: | |
2177 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2178 | * Which simplifies to: | |
2179 | * uN + kN + kN-1 + ... + k1 + k0 | |
2180 | * Note however, if we stop before we reach the ORIGIN we get: | |
2181 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2182 | */ | |
788eb90c | 2183 | ss_mv_cnt = 0; |
d683ddbb JG |
2184 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
2185 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2186 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
2187 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2188 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 2189 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 2190 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 2191 | |
788eb90c JJ |
2192 | ss_mv_cnt++; |
2193 | ||
13fe0198 MA |
2194 | /* |
2195 | * If there are long holds, we won't be able to evict | |
2196 | * the objset. | |
2197 | */ | |
2198 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 2199 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
2200 | goto out; |
2201 | } | |
2202 | ||
34dc7c2f | 2203 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 2204 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
2205 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
2206 | err = SET_ERROR(ENAMETOOLONG); | |
2207 | goto out; | |
2208 | } | |
b128c09f | 2209 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 2210 | if (err == 0) { |
13fe0198 | 2211 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); |
2e528b49 | 2212 | err = SET_ERROR(EEXIST); |
428870ff BB |
2213 | goto out; |
2214 | } | |
b128c09f | 2215 | if (err != ENOENT) |
428870ff | 2216 | goto out; |
34dc7c2f | 2217 | |
b128c09f | 2218 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 2219 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 2220 | continue; |
34dc7c2f | 2221 | |
428870ff BB |
2222 | dsl_deadlist_space(&ds->ds_deadlist, |
2223 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
2224 | ddpa->used += dlused; |
2225 | ddpa->comp += dlcomp; | |
2226 | ddpa->uncomp += dluncomp; | |
b128c09f | 2227 | } |
34dc7c2f | 2228 | |
b128c09f BB |
2229 | /* |
2230 | * If we are a clone of a clone then we never reached ORIGIN, | |
2231 | * so we need to subtract out the clone origin's used space. | |
2232 | */ | |
13fe0198 | 2233 | if (ddpa->origin_origin) { |
d683ddbb JG |
2234 | ddpa->used -= |
2235 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2236 | ddpa->comp -= | |
2237 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 2238 | ddpa->uncomp -= |
d683ddbb JG |
2239 | dsl_dataset_phys(ddpa->origin_origin)-> |
2240 | ds_uncompressed_bytes; | |
34dc7c2f BB |
2241 | } |
2242 | ||
788eb90c | 2243 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 2244 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 2245 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
2246 | if (err != 0) |
2247 | goto out; | |
34dc7c2f | 2248 | |
b128c09f BB |
2249 | /* |
2250 | * Compute the amounts of space that will be used by snapshots | |
2251 | * after the promotion (for both origin and clone). For each, | |
2252 | * it is the amount of space that will be on all of their | |
2253 | * deadlists (that was not born before their new origin). | |
2254 | */ | |
d683ddbb | 2255 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
2256 | uint64_t space; |
2257 | ||
2258 | /* | |
2259 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
2260 | * so dd_origin_txg will be < TXG_INITIAL, so |
2261 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
2262 | * calls will be fast because they do not have to |
2263 | * iterate over all bps. | |
2264 | */ | |
13fe0198 MA |
2265 | snap = list_head(&ddpa->origin_snaps); |
2266 | err = snaplist_space(&ddpa->shared_snaps, | |
2267 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2268 | if (err != 0) | |
2269 | goto out; | |
b128c09f | 2270 | |
13fe0198 | 2271 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 2272 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
2273 | if (err != 0) |
2274 | goto out; | |
2275 | ddpa->cloneusedsnap += space; | |
b128c09f | 2276 | } |
d683ddbb JG |
2277 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
2278 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 2279 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
2280 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
2281 | &ddpa->originusedsnap); | |
13fe0198 MA |
2282 | if (err != 0) |
2283 | goto out; | |
b128c09f BB |
2284 | } |
2285 | ||
428870ff | 2286 | out: |
13fe0198 | 2287 | promote_rele(ddpa, FTAG); |
428870ff | 2288 | return (err); |
34dc7c2f BB |
2289 | } |
2290 | ||
2291 | static void | |
13fe0198 | 2292 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2293 | { |
13fe0198 MA |
2294 | dsl_dataset_promote_arg_t *ddpa = arg; |
2295 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2296 | dsl_dataset_t *hds; | |
2297 | struct promotenode *snap; | |
2298 | dsl_dataset_t *origin_ds; | |
b128c09f | 2299 | dsl_dataset_t *origin_head; |
13fe0198 | 2300 | dsl_dir_t *dd; |
34dc7c2f | 2301 | dsl_dir_t *odd = NULL; |
b128c09f BB |
2302 | uint64_t oldnext_obj; |
2303 | int64_t delta; | |
34dc7c2f | 2304 | |
13fe0198 MA |
2305 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
2306 | hds = ddpa->ddpa_clone; | |
2307 | ||
d683ddbb | 2308 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
2309 | |
2310 | snap = list_head(&ddpa->shared_snaps); | |
2311 | origin_ds = snap->ds; | |
2312 | dd = hds->ds_dir; | |
34dc7c2f | 2313 | |
13fe0198 | 2314 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
2315 | origin_head = snap->ds; |
2316 | ||
34dc7c2f BB |
2317 | /* |
2318 | * We need to explicitly open odd, since origin_ds's dd will be | |
2319 | * changing. | |
2320 | */ | |
13fe0198 | 2321 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
2322 | NULL, FTAG, &odd)); |
2323 | ||
b128c09f BB |
2324 | /* change origin's next snap */ |
2325 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 2326 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 2327 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2328 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2329 | origin_ds->ds_object); | |
2330 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
2331 | |
2332 | /* change the origin's next clone */ | |
d683ddbb | 2333 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
2334 | dsl_dataset_remove_from_next_clones(origin_ds, |
2335 | snap->ds->ds_object, tx); | |
2336 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 2337 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
2338 | oldnext_obj, tx)); |
2339 | } | |
2340 | ||
2341 | /* change origin */ | |
2342 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
2343 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
2344 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 2345 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 2346 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 2347 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 2348 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 2349 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
2350 | |
2351 | /* change dd_clone entries */ | |
2352 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 2353 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2354 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 2355 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2356 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
2357 | hds->ds_object, tx)); |
2358 | ||
13fe0198 | 2359 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2360 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 2361 | origin_head->ds_object, tx)); |
d683ddbb JG |
2362 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
2363 | dsl_dir_phys(dd)->dd_clones = | |
2364 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2365 | DMU_OT_NONE, 0, tx); | |
428870ff | 2366 | } |
13fe0198 | 2367 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2368 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 2369 | } |
34dc7c2f | 2370 | |
b128c09f | 2371 | /* move snapshots to this dir */ |
13fe0198 MA |
2372 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2373 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
2374 | dsl_dataset_t *ds = snap->ds; |
2375 | ||
13fe0198 MA |
2376 | /* |
2377 | * Property callbacks are registered to a particular | |
2378 | * dsl_dir. Since ours is changing, evict the objset | |
2379 | * so that they will be unregistered from the old dsl_dir. | |
2380 | */ | |
428870ff BB |
2381 | if (ds->ds_objset) { |
2382 | dmu_objset_evict(ds->ds_objset); | |
2383 | ds->ds_objset = NULL; | |
b128c09f | 2384 | } |
13fe0198 | 2385 | |
34dc7c2f | 2386 | /* move snap name entry */ |
13fe0198 MA |
2387 | VERIFY0(dsl_dataset_get_snapname(ds)); |
2388 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 2389 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 2390 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 2391 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 2392 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
2393 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
2394 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 2395 | |
34dc7c2f BB |
2396 | /* change containing dsl_dir */ |
2397 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
2398 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
2399 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 2400 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
2401 | dsl_dir_rele(ds->ds_dir, ds); |
2402 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
2403 | NULL, ds, &ds->ds_dir)); |
2404 | ||
428870ff | 2405 | /* move any clone references */ |
d683ddbb | 2406 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
2407 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
2408 | zap_cursor_t zc; | |
2409 | zap_attribute_t za; | |
2410 | ||
2411 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 2412 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 2413 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
2414 | zap_cursor_advance(&zc)) { |
2415 | dsl_dataset_t *cnds; | |
2416 | uint64_t o; | |
34dc7c2f | 2417 | |
13fe0198 MA |
2418 | if (za.za_first_integer == oldnext_obj) { |
2419 | /* | |
2420 | * We've already moved the | |
2421 | * origin's reference. | |
2422 | */ | |
2423 | continue; | |
2424 | } | |
34dc7c2f | 2425 | |
13fe0198 MA |
2426 | VERIFY0(dsl_dataset_hold_obj(dp, |
2427 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
2428 | o = dsl_dir_phys(cnds->ds_dir)-> |
2429 | dd_head_dataset_obj; | |
34dc7c2f | 2430 | |
13fe0198 | 2431 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2432 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 2433 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2434 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
2435 | dsl_dataset_rele(cnds, FTAG); |
2436 | } | |
2437 | zap_cursor_fini(&zc); | |
2438 | } | |
34dc7c2f | 2439 | |
13fe0198 | 2440 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
2441 | } |
2442 | ||
34dc7c2f | 2443 | /* |
13fe0198 MA |
2444 | * Change space accounting. |
2445 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2446 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2447 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 2448 | */ |
570827e1 | 2449 | |
13fe0198 | 2450 | delta = ddpa->cloneusedsnap - |
d683ddbb | 2451 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2452 | ASSERT3S(delta, >=, 0); |
2453 | ASSERT3U(ddpa->used, >=, delta); | |
2454 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2455 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2456 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 2457 | |
13fe0198 | 2458 | delta = ddpa->originusedsnap - |
d683ddbb | 2459 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2460 | ASSERT3S(delta, <=, 0); |
2461 | ASSERT3U(ddpa->used, >=, -delta); | |
2462 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2463 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2464 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2465 | ||
d683ddbb | 2466 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
2467 | |
2468 | /* log history record */ | |
2469 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2470 | ||
2471 | dsl_dir_rele(odd, FTAG); | |
2472 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
2473 | } |
2474 | ||
13fe0198 MA |
2475 | /* |
2476 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2477 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2478 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2479 | * snapshots back to this dataset's origin. | |
2480 | */ | |
34dc7c2f | 2481 | static int |
13fe0198 MA |
2482 | snaplist_make(dsl_pool_t *dp, |
2483 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 2484 | { |
13fe0198 | 2485 | uint64_t obj = last_obj; |
34dc7c2f | 2486 | |
13fe0198 MA |
2487 | list_create(l, sizeof (struct promotenode), |
2488 | offsetof(struct promotenode, link)); | |
34dc7c2f | 2489 | |
13fe0198 MA |
2490 | while (obj != first_obj) { |
2491 | dsl_dataset_t *ds; | |
2492 | struct promotenode *snap; | |
2493 | int err; | |
428870ff | 2494 | |
13fe0198 MA |
2495 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
2496 | ASSERT(err != ENOENT); | |
2497 | if (err != 0) | |
2498 | return (err); | |
34dc7c2f | 2499 | |
13fe0198 | 2500 | if (first_obj == 0) |
d683ddbb | 2501 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 2502 | |
79c76d5b | 2503 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
2504 | snap->ds = ds; |
2505 | list_insert_tail(l, snap); | |
d683ddbb | 2506 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 2507 | } |
34dc7c2f BB |
2508 | |
2509 | return (0); | |
2510 | } | |
2511 | ||
13fe0198 MA |
2512 | static int |
2513 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 2514 | { |
13fe0198 | 2515 | struct promotenode *snap; |
6f1ffb06 | 2516 | |
13fe0198 MA |
2517 | *spacep = 0; |
2518 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2519 | uint64_t used, comp, uncomp; | |
2520 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2521 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2522 | *spacep += used; | |
428870ff | 2523 | } |
13fe0198 | 2524 | return (0); |
34dc7c2f BB |
2525 | } |
2526 | ||
13fe0198 MA |
2527 | static void |
2528 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 2529 | { |
13fe0198 | 2530 | struct promotenode *snap; |
428870ff | 2531 | |
13fe0198 MA |
2532 | if (l == NULL || !list_link_active(&l->list_head)) |
2533 | return; | |
34dc7c2f | 2534 | |
13fe0198 MA |
2535 | while ((snap = list_tail(l)) != NULL) { |
2536 | list_remove(l, snap); | |
2537 | dsl_dataset_rele(snap->ds, tag); | |
2538 | kmem_free(snap, sizeof (*snap)); | |
2539 | } | |
2540 | list_destroy(l); | |
34dc7c2f BB |
2541 | } |
2542 | ||
2543 | static int | |
13fe0198 | 2544 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 2545 | { |
13fe0198 MA |
2546 | int error; |
2547 | dsl_dir_t *dd; | |
2548 | struct promotenode *snap; | |
34dc7c2f | 2549 | |
13fe0198 MA |
2550 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
2551 | &ddpa->ddpa_clone); | |
2552 | if (error != 0) | |
2553 | return (error); | |
2554 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 2555 | |
0c66c32d | 2556 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
2557 | !dsl_dir_is_clone(dd)) { |
2558 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 2559 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2560 | } |
34dc7c2f | 2561 | |
d683ddbb | 2562 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
2563 | &ddpa->shared_snaps, tag); |
2564 | if (error != 0) | |
2565 | goto out; | |
34dc7c2f | 2566 | |
13fe0198 MA |
2567 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
2568 | &ddpa->clone_snaps, tag); | |
2569 | if (error != 0) | |
2570 | goto out; | |
34dc7c2f | 2571 | |
13fe0198 | 2572 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
2573 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
2574 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2575 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
2576 | &ddpa->origin_snaps, tag); |
2577 | if (error != 0) | |
2578 | goto out; | |
d164b209 | 2579 | |
d683ddbb | 2580 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 2581 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 2582 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
2583 | tag, &ddpa->origin_origin); |
2584 | if (error != 0) | |
2585 | goto out; | |
d164b209 | 2586 | } |
13fe0198 MA |
2587 | out: |
2588 | if (error != 0) | |
2589 | promote_rele(ddpa, tag); | |
2590 | return (error); | |
34dc7c2f BB |
2591 | } |
2592 | ||
34dc7c2f | 2593 | static void |
13fe0198 | 2594 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 2595 | { |
13fe0198 MA |
2596 | snaplist_destroy(&ddpa->shared_snaps, tag); |
2597 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2598 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2599 | if (ddpa->origin_origin != NULL) | |
2600 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2601 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2602 | } | |
428870ff | 2603 | |
13fe0198 MA |
2604 | /* |
2605 | * Promote a clone. | |
2606 | * | |
2607 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
2608 | * in with the name. (It must be at least MAXNAMELEN bytes long.) | |
2609 | */ | |
2610 | int | |
2611 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2612 | { | |
2613 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2614 | uint64_t numsnaps; | |
2615 | int error; | |
2616 | objset_t *os; | |
34dc7c2f | 2617 | |
13fe0198 MA |
2618 | /* |
2619 | * We will modify space proportional to the number of | |
2620 | * snapshots. Compute numsnaps. | |
2621 | */ | |
2622 | error = dmu_objset_hold(name, FTAG, &os); | |
2623 | if (error != 0) | |
2624 | return (error); | |
2625 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
2626 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
2627 | &numsnaps); | |
13fe0198 MA |
2628 | dmu_objset_rele(os, FTAG); |
2629 | if (error != 0) | |
2630 | return (error); | |
34dc7c2f | 2631 | |
13fe0198 MA |
2632 | ddpa.ddpa_clonename = name; |
2633 | ddpa.err_ds = conflsnap; | |
788eb90c | 2634 | ddpa.cr = CRED(); |
6f1ffb06 | 2635 | |
13fe0198 | 2636 | return (dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 MA |
2637 | dsl_dataset_promote_sync, &ddpa, |
2638 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2639 | } |
2640 | ||
2641 | int | |
13fe0198 | 2642 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 2643 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 2644 | { |
13fe0198 | 2645 | int64_t unused_refres_delta; |
34dc7c2f | 2646 | |
13fe0198 | 2647 | /* they should both be heads */ |
0c66c32d JG |
2648 | if (clone->ds_is_snapshot || |
2649 | origin_head->ds_is_snapshot) | |
2e528b49 | 2650 | return (SET_ERROR(EINVAL)); |
428870ff | 2651 | |
19580676 MA |
2652 | /* if we are not forcing, the branch point should be just before them */ |
2653 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 2654 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2655 | |
13fe0198 MA |
2656 | /* clone should be the clone (unless they are unrelated) */ |
2657 | if (clone->ds_prev != NULL && | |
2658 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 2659 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 2660 | return (SET_ERROR(EINVAL)); |
428870ff | 2661 | |
13fe0198 MA |
2662 | /* the clone should be a child of the origin */ |
2663 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 2664 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 2665 | |
13fe0198 | 2666 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
2667 | if (!force && |
2668 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 2669 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 2670 | |
13fe0198 | 2671 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 2672 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 2673 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
2674 | |
2675 | /* check amount of any unconsumed refreservation */ | |
2676 | unused_refres_delta = | |
2677 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2678 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2679 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2680 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2681 | |
2682 | if (unused_refres_delta > 0 && | |
2683 | unused_refres_delta > | |
2684 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 2685 | return (SET_ERROR(ENOSPC)); |
13fe0198 MA |
2686 | |
2687 | /* clone can't be over the head's refquota */ | |
2688 | if (origin_head->ds_quota != 0 && | |
d683ddbb JG |
2689 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
2690 | origin_head->ds_quota) | |
2e528b49 | 2691 | return (SET_ERROR(EDQUOT)); |
572e2857 | 2692 | |
13fe0198 | 2693 | return (0); |
572e2857 BB |
2694 | } |
2695 | ||
2696 | void | |
13fe0198 MA |
2697 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
2698 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 2699 | { |
13fe0198 MA |
2700 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2701 | int64_t unused_refres_delta; | |
428870ff | 2702 | |
13fe0198 MA |
2703 | ASSERT(clone->ds_reserved == 0); |
2704 | ASSERT(origin_head->ds_quota == 0 || | |
d683ddbb | 2705 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota); |
19580676 | 2706 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 2707 | |
13fe0198 MA |
2708 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
2709 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 2710 | |
13fe0198 MA |
2711 | if (clone->ds_objset != NULL) { |
2712 | dmu_objset_evict(clone->ds_objset); | |
2713 | clone->ds_objset = NULL; | |
2714 | } | |
45d1cae3 | 2715 | |
13fe0198 MA |
2716 | if (origin_head->ds_objset != NULL) { |
2717 | dmu_objset_evict(origin_head->ds_objset); | |
2718 | origin_head->ds_objset = NULL; | |
45d1cae3 | 2719 | } |
45d1cae3 | 2720 | |
13fe0198 MA |
2721 | unused_refres_delta = |
2722 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2723 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2724 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2725 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2726 | |
2727 | /* | |
2728 | * Reset origin's unique bytes, if it exists. | |
2729 | */ | |
2730 | if (clone->ds_prev) { | |
2731 | dsl_dataset_t *origin = clone->ds_prev; | |
2732 | uint64_t comp, uncomp; | |
2733 | ||
2734 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
2735 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
2736 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
2737 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
2738 | } |
2739 | ||
2740 | /* swap blkptrs */ | |
2741 | { | |
2742 | blkptr_t tmp; | |
d683ddbb JG |
2743 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
2744 | dsl_dataset_phys(origin_head)->ds_bp = | |
2745 | dsl_dataset_phys(clone)->ds_bp; | |
2746 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
13fe0198 MA |
2747 | } |
2748 | ||
2749 | /* set dd_*_bytes */ | |
2750 | { | |
2751 | int64_t dused, dcomp, duncomp; | |
2752 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
2753 | uint64_t odl_used, odl_comp, odl_uncomp; | |
2754 | ||
d683ddbb | 2755 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
2756 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
2757 | ||
2758 | dsl_deadlist_space(&clone->ds_deadlist, | |
2759 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
2760 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
2761 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 2762 | |
d683ddbb JG |
2763 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
2764 | cdl_used - | |
2765 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
2766 | odl_used); | |
2767 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
2768 | cdl_comp - | |
2769 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
2770 | odl_comp); | |
2771 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 2772 | cdl_uncomp - |
d683ddbb JG |
2773 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
2774 | odl_uncomp); | |
45d1cae3 | 2775 | |
13fe0198 MA |
2776 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
2777 | dused, dcomp, duncomp, tx); | |
2778 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
2779 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 2780 | |
45d1cae3 | 2781 | /* |
13fe0198 MA |
2782 | * The difference in the space used by snapshots is the |
2783 | * difference in snapshot space due to the head's | |
2784 | * deadlist (since that's the only thing that's | |
2785 | * changing that affects the snapused). | |
45d1cae3 | 2786 | */ |
13fe0198 MA |
2787 | dsl_deadlist_space_range(&clone->ds_deadlist, |
2788 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
2789 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
2790 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
2791 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
2792 | &odl_used, &odl_comp, &odl_uncomp); | |
2793 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
2794 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 2795 | } |
45d1cae3 | 2796 | |
13fe0198 | 2797 | /* swap ds_*_bytes */ |
d683ddbb JG |
2798 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
2799 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
2800 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
2801 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
2802 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
2803 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
2804 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
2805 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 2806 | |
13fe0198 MA |
2807 | /* apply any parent delta for change in unconsumed refreservation */ |
2808 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
2809 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 2810 | |
13fe0198 MA |
2811 | /* |
2812 | * Swap deadlists. | |
2813 | */ | |
2814 | dsl_deadlist_close(&clone->ds_deadlist); | |
2815 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
2816 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
2817 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 2818 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 2819 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 2820 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 2821 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
45d1cae3 | 2822 | |
13fe0198 | 2823 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 2824 | |
13fe0198 MA |
2825 | spa_history_log_internal_ds(clone, "clone swap", tx, |
2826 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
2827 | } |
2828 | ||
13fe0198 MA |
2829 | /* |
2830 | * Given a pool name and a dataset object number in that pool, | |
2831 | * return the name of that dataset. | |
2832 | */ | |
572e2857 | 2833 | int |
13fe0198 | 2834 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 2835 | { |
13fe0198 MA |
2836 | dsl_pool_t *dp; |
2837 | dsl_dataset_t *ds; | |
572e2857 BB |
2838 | int error; |
2839 | ||
13fe0198 MA |
2840 | error = dsl_pool_hold(pname, FTAG, &dp); |
2841 | if (error != 0) | |
2842 | return (error); | |
2843 | ||
2844 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
2845 | if (error == 0) { | |
2846 | dsl_dataset_name(ds, buf); | |
2847 | dsl_dataset_rele(ds, FTAG); | |
2848 | } | |
2849 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
2850 | |
2851 | return (error); | |
2852 | } | |
2853 | ||
45d1cae3 | 2854 | int |
13fe0198 MA |
2855 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
2856 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 2857 | { |
13fe0198 | 2858 | int error = 0; |
45d1cae3 | 2859 | |
13fe0198 | 2860 | ASSERT3S(asize, >, 0); |
45d1cae3 | 2861 | |
13fe0198 MA |
2862 | /* |
2863 | * *ref_rsrv is the portion of asize that will come from any | |
2864 | * unconsumed refreservation space. | |
2865 | */ | |
2866 | *ref_rsrv = 0; | |
45d1cae3 | 2867 | |
13fe0198 MA |
2868 | mutex_enter(&ds->ds_lock); |
2869 | /* | |
2870 | * Make a space adjustment for reserved bytes. | |
2871 | */ | |
d683ddbb | 2872 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 2873 | ASSERT3U(*used, >=, |
d683ddbb JG |
2874 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
2875 | *used -= | |
2876 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
2877 | *ref_rsrv = |
2878 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
2879 | } |
2880 | ||
13fe0198 MA |
2881 | if (!check_quota || ds->ds_quota == 0) { |
2882 | mutex_exit(&ds->ds_lock); | |
2883 | return (0); | |
45d1cae3 | 2884 | } |
13fe0198 MA |
2885 | /* |
2886 | * If they are requesting more space, and our current estimate | |
2887 | * is over quota, they get to try again unless the actual | |
2888 | * on-disk is over quota and there are no pending changes (which | |
2889 | * may free up space for us). | |
2890 | */ | |
d683ddbb JG |
2891 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
2892 | ds->ds_quota) { | |
13fe0198 | 2893 | if (inflight > 0 || |
d683ddbb | 2894 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 2895 | error = SET_ERROR(ERESTART); |
13fe0198 | 2896 | else |
2e528b49 | 2897 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 2898 | } |
13fe0198 | 2899 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 2900 | |
45d1cae3 BB |
2901 | return (error); |
2902 | } | |
2903 | ||
13fe0198 MA |
2904 | typedef struct dsl_dataset_set_qr_arg { |
2905 | const char *ddsqra_name; | |
2906 | zprop_source_t ddsqra_source; | |
2907 | uint64_t ddsqra_value; | |
2908 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 2909 | |
13fe0198 MA |
2910 | |
2911 | /* ARGSUSED */ | |
45d1cae3 | 2912 | static int |
13fe0198 | 2913 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 2914 | { |
13fe0198 MA |
2915 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
2916 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2917 | dsl_dataset_t *ds; | |
45d1cae3 | 2918 | int error; |
13fe0198 | 2919 | uint64_t newval; |
45d1cae3 | 2920 | |
13fe0198 | 2921 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 2922 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 2923 | |
13fe0198 MA |
2924 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
2925 | if (error != 0) | |
2926 | return (error); | |
2927 | ||
0c66c32d | 2928 | if (ds->ds_is_snapshot) { |
13fe0198 | 2929 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2930 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
2931 | } |
2932 | ||
13fe0198 MA |
2933 | error = dsl_prop_predict(ds->ds_dir, |
2934 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
2935 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
2936 | if (error != 0) { | |
2937 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
2938 | return (error); |
2939 | } | |
2940 | ||
13fe0198 MA |
2941 | if (newval == 0) { |
2942 | dsl_dataset_rele(ds, FTAG); | |
2943 | return (0); | |
2944 | } | |
2945 | ||
d683ddbb | 2946 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
2947 | newval < ds->ds_reserved) { |
2948 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2949 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2950 | } |
45d1cae3 | 2951 | |
13fe0198 | 2952 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
2953 | return (0); |
2954 | } | |
2955 | ||
13fe0198 MA |
2956 | static void |
2957 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 2958 | { |
13fe0198 MA |
2959 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
2960 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2961 | dsl_dataset_t *ds; | |
2962 | uint64_t newval; | |
45d1cae3 | 2963 | |
13fe0198 | 2964 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 2965 | |
13fe0198 MA |
2966 | dsl_prop_set_sync_impl(ds, |
2967 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
2968 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
2969 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 2970 | |
13fe0198 MA |
2971 | VERIFY0(dsl_prop_get_int_ds(ds, |
2972 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 2973 | |
13fe0198 MA |
2974 | if (ds->ds_quota != newval) { |
2975 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
2976 | ds->ds_quota = newval; | |
45d1cae3 | 2977 | } |
13fe0198 | 2978 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
2979 | } |
2980 | ||
13fe0198 MA |
2981 | int |
2982 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
2983 | uint64_t refquota) | |
45d1cae3 | 2984 | { |
13fe0198 | 2985 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 2986 | |
13fe0198 MA |
2987 | ddsqra.ddsqra_name = dsname; |
2988 | ddsqra.ddsqra_source = source; | |
2989 | ddsqra.ddsqra_value = refquota; | |
2990 | ||
2991 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3d45fdd6 | 2992 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); |
45d1cae3 BB |
2993 | } |
2994 | ||
2995 | static int | |
13fe0198 | 2996 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 2997 | { |
13fe0198 MA |
2998 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
2999 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
3000 | dsl_dataset_t *ds; |
3001 | int error; | |
13fe0198 | 3002 | uint64_t newval, unique; |
428870ff | 3003 | |
13fe0198 | 3004 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 3005 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3006 | |
13fe0198 MA |
3007 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3008 | if (error != 0) | |
45d1cae3 | 3009 | return (error); |
45d1cae3 | 3010 | |
0c66c32d | 3011 | if (ds->ds_is_snapshot) { |
13fe0198 | 3012 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3013 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3014 | } |
3015 | ||
13fe0198 MA |
3016 | error = dsl_prop_predict(ds->ds_dir, |
3017 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3018 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3019 | if (error != 0) { | |
3020 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3021 | return (error); |
3022 | } | |
3023 | ||
13fe0198 MA |
3024 | /* |
3025 | * If we are doing the preliminary check in open context, the | |
3026 | * space estimates may be inaccurate. | |
3027 | */ | |
3028 | if (!dmu_tx_is_syncing(tx)) { | |
3029 | dsl_dataset_rele(ds, FTAG); | |
3030 | return (0); | |
45d1cae3 | 3031 | } |
45d1cae3 | 3032 | |
13fe0198 MA |
3033 | mutex_enter(&ds->ds_lock); |
3034 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3035 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 3036 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 3037 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3038 | |
13fe0198 MA |
3039 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
3040 | uint64_t delta = MAX(unique, newval) - | |
3041 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 3042 | |
13fe0198 MA |
3043 | if (delta > |
3044 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3045 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3046 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3047 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3048 | } |
45d1cae3 BB |
3049 | } |
3050 | ||
13fe0198 MA |
3051 | dsl_dataset_rele(ds, FTAG); |
3052 | return (0); | |
45d1cae3 BB |
3053 | } |
3054 | ||
13fe0198 MA |
3055 | void |
3056 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3057 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 3058 | { |
13fe0198 MA |
3059 | uint64_t newval; |
3060 | uint64_t unique; | |
3061 | int64_t delta; | |
428870ff | 3062 | |
13fe0198 MA |
3063 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
3064 | source, sizeof (value), 1, &value, tx); | |
428870ff | 3065 | |
13fe0198 MA |
3066 | VERIFY0(dsl_prop_get_int_ds(ds, |
3067 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 3068 | |
13fe0198 MA |
3069 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
3070 | mutex_enter(&ds->ds_dir->dd_lock); | |
3071 | mutex_enter(&ds->ds_lock); | |
3072 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 3073 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
3074 | delta = MAX(0, (int64_t)(newval - unique)) - |
3075 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3076 | ds->ds_reserved = newval; | |
3077 | mutex_exit(&ds->ds_lock); | |
572e2857 | 3078 | |
13fe0198 MA |
3079 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
3080 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
3081 | } |
3082 | ||
13fe0198 MA |
3083 | static void |
3084 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3085 | { |
13fe0198 MA |
3086 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3087 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 | 3088 | dsl_dataset_t *ds; |
45d1cae3 | 3089 | |
13fe0198 MA |
3090 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
3091 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3092 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3093 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 3094 | } |
428870ff | 3095 | |
428870ff | 3096 | int |
13fe0198 MA |
3097 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
3098 | uint64_t refreservation) | |
428870ff | 3099 | { |
13fe0198 | 3100 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3101 | |
13fe0198 MA |
3102 | ddsqra.ddsqra_name = dsname; |
3103 | ddsqra.ddsqra_source = source; | |
3104 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 3105 | |
13fe0198 | 3106 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
3d45fdd6 MA |
3107 | dsl_dataset_set_refreservation_sync, &ddsqra, |
3108 | 0, ZFS_SPACE_CHECK_NONE)); | |
13fe0198 | 3109 | } |
330d06f9 MA |
3110 | |
3111 | /* | |
3112 | * Return (in *usedp) the amount of space written in new that is not | |
3113 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3114 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3115 | * fail and return EINVAL. | |
3116 | * | |
3117 | * The written space is calculated by considering two components: First, we | |
3118 | * ignore any freed space, and calculate the written as new's used space | |
3119 | * minus old's used space. Next, we add in the amount of space that was freed | |
3120 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3121 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3122 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3123 | * | |
3124 | * space freed [---------------------] | |
3125 | * snapshots ---O-------O--------O-------O------ | |
3126 | * oldsnap new | |
3127 | */ | |
3128 | int | |
3129 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3130 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3131 | { | |
3132 | int err = 0; | |
3133 | uint64_t snapobj; | |
3134 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3135 | ||
13fe0198 MA |
3136 | ASSERT(dsl_pool_config_held(dp)); |
3137 | ||
330d06f9 | 3138 | *usedp = 0; |
d683ddbb JG |
3139 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
3140 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
3141 | |
3142 | *compp = 0; | |
d683ddbb JG |
3143 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
3144 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
3145 | |
3146 | *uncompp = 0; | |
d683ddbb JG |
3147 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
3148 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 3149 | |
330d06f9 MA |
3150 | snapobj = new->ds_object; |
3151 | while (snapobj != oldsnap->ds_object) { | |
3152 | dsl_dataset_t *snap; | |
3153 | uint64_t used, comp, uncomp; | |
3154 | ||
9ae529ec CS |
3155 | if (snapobj == new->ds_object) { |
3156 | snap = new; | |
3157 | } else { | |
3158 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3159 | if (err != 0) | |
3160 | break; | |
3161 | } | |
330d06f9 | 3162 | |
d683ddbb JG |
3163 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
3164 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
3165 | /* |
3166 | * The blocks in the deadlist can not be born after | |
3167 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3168 | * which is more efficient (especially for old-format | |
3169 | * deadlists). Unfortunately the deadlist code | |
3170 | * doesn't have enough information to make this | |
3171 | * optimization itself. | |
3172 | */ | |
3173 | dsl_deadlist_space(&snap->ds_deadlist, | |
3174 | &used, &comp, &uncomp); | |
3175 | } else { | |
3176 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 3177 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
3178 | &used, &comp, &uncomp); |
3179 | } | |
3180 | *usedp += used; | |
3181 | *compp += comp; | |
3182 | *uncompp += uncomp; | |
3183 | ||
3184 | /* | |
3185 | * If we get to the beginning of the chain of snapshots | |
3186 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3187 | * was not a snapshot of/before new. | |
3188 | */ | |
d683ddbb | 3189 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
3190 | if (snap != new) |
3191 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 3192 | if (snapobj == 0) { |
2e528b49 | 3193 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
3194 | break; |
3195 | } | |
3196 | ||
3197 | } | |
330d06f9 MA |
3198 | return (err); |
3199 | } | |
3200 | ||
3201 | /* | |
3202 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3203 | * lastsnap, and all snapshots in between are deleted. | |
3204 | * | |
3205 | * blocks that would be freed [---------------------------] | |
3206 | * snapshots ---O-------O--------O-------O--------O | |
3207 | * firstsnap lastsnap | |
3208 | * | |
3209 | * This is the set of blocks that were born after the snap before firstsnap, | |
3210 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3211 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3212 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3213 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3214 | * space on the deadlist that was born after the snap before firstsnap. | |
3215 | */ | |
3216 | int | |
3217 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3218 | dsl_dataset_t *lastsnap, | |
3219 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3220 | { | |
3221 | int err = 0; | |
3222 | uint64_t snapobj; | |
3223 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3224 | ||
0c66c32d JG |
3225 | ASSERT(firstsnap->ds_is_snapshot); |
3226 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
3227 | |
3228 | /* | |
3229 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3230 | * is before lastsnap. | |
3231 | */ | |
3232 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
3233 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
3234 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 3235 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
3236 | |
3237 | *usedp = *compp = *uncompp = 0; | |
3238 | ||
d683ddbb | 3239 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
3240 | while (snapobj != firstsnap->ds_object) { |
3241 | dsl_dataset_t *ds; | |
3242 | uint64_t used, comp, uncomp; | |
3243 | ||
3244 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3245 | if (err != 0) | |
3246 | break; | |
3247 | ||
3248 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 3249 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
3250 | &used, &comp, &uncomp); |
3251 | *usedp += used; | |
3252 | *compp += comp; | |
3253 | *uncompp += uncomp; | |
3254 | ||
d683ddbb | 3255 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
3256 | ASSERT3U(snapobj, !=, 0); |
3257 | dsl_dataset_rele(ds, FTAG); | |
3258 | } | |
330d06f9 MA |
3259 | return (err); |
3260 | } | |
3261 | ||
f1512ee6 MA |
3262 | static int |
3263 | dsl_dataset_activate_large_blocks_check(void *arg, dmu_tx_t *tx) | |
3264 | { | |
3265 | const char *dsname = arg; | |
3266 | dsl_dataset_t *ds; | |
3267 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3268 | int error = 0; | |
3269 | ||
3270 | if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) | |
3271 | return (SET_ERROR(ENOTSUP)); | |
3272 | ||
3273 | ASSERT(spa_feature_is_enabled(dp->dp_spa, | |
3274 | SPA_FEATURE_EXTENSIBLE_DATASET)); | |
3275 | ||
3276 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
3277 | if (error != 0) | |
3278 | return (error); | |
3279 | ||
3280 | if (ds->ds_large_blocks) | |
3281 | error = EALREADY; | |
3282 | dsl_dataset_rele(ds, FTAG); | |
3283 | ||
3284 | return (error); | |
3285 | } | |
3286 | ||
3287 | void | |
3288 | dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx) | |
3289 | { | |
3290 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
3291 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
3292 | uint64_t zero = 0; | |
3293 | ||
3294 | spa_feature_incr(spa, SPA_FEATURE_LARGE_BLOCKS, tx); | |
3295 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
3296 | ||
3297 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_LARGE_BLOCKS, | |
3298 | sizeof (zero), 1, &zero, tx)); | |
3299 | } | |
3300 | ||
3301 | static void | |
3302 | dsl_dataset_activate_large_blocks_sync(void *arg, dmu_tx_t *tx) | |
3303 | { | |
3304 | const char *dsname = arg; | |
3305 | dsl_dataset_t *ds; | |
3306 | ||
3307 | VERIFY0(dsl_dataset_hold(dmu_tx_pool(tx), dsname, FTAG, &ds)); | |
3308 | ||
3309 | dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); | |
3310 | ASSERT(!ds->ds_large_blocks); | |
3311 | ds->ds_large_blocks = B_TRUE; | |
3312 | dsl_dataset_rele(ds, FTAG); | |
3313 | } | |
3314 | ||
3315 | int | |
3316 | dsl_dataset_activate_large_blocks(const char *dsname) | |
3317 | { | |
3318 | int error; | |
3319 | ||
3320 | error = dsl_sync_task(dsname, | |
3321 | dsl_dataset_activate_large_blocks_check, | |
3322 | dsl_dataset_activate_large_blocks_sync, (void *)dsname, | |
3323 | 1, ZFS_SPACE_CHECK_RESERVED); | |
3324 | ||
3325 | /* | |
3326 | * EALREADY indicates that this dataset already supports large blocks. | |
3327 | */ | |
3328 | if (error == EALREADY) | |
3329 | error = 0; | |
3330 | return (error); | |
3331 | } | |
3332 | ||
13fe0198 MA |
3333 | /* |
3334 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3335 | * For example, they could both be snapshots of the same filesystem, and | |
3336 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3337 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3338 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
3339 | * |
3340 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
3341 | */ |
3342 | boolean_t | |
da536844 MA |
3343 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
3344 | uint64_t earlier_txg) | |
13fe0198 MA |
3345 | { |
3346 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3347 | int error; | |
3348 | boolean_t ret; | |
3349 | dsl_dataset_t *origin; | |
3350 | ||
3351 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 3352 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
3353 | |
3354 | if (earlier_txg == 0) | |
d683ddbb | 3355 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 3356 | |
0c66c32d | 3357 | if (later->ds_is_snapshot && |
d683ddbb | 3358 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
3359 | return (B_FALSE); |
3360 | ||
3361 | if (later->ds_dir == earlier->ds_dir) | |
3362 | return (B_TRUE); | |
3363 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3364 | return (B_FALSE); | |
3365 | ||
d683ddbb | 3366 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 MA |
3367 | return (B_TRUE); |
3368 | error = dsl_dataset_hold_obj(dp, | |
d683ddbb | 3369 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
3370 | if (error != 0) |
3371 | return (B_FALSE); | |
da536844 | 3372 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
3373 | dsl_dataset_rele(origin, FTAG); |
3374 | return (ret); | |
3375 | } | |
3376 | ||
fa86b5db MA |
3377 | |
3378 | void | |
3379 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3380 | { | |
3381 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3382 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3383 | } | |
3384 | ||
c28b2279 | 3385 | #if defined(_KERNEL) && defined(HAVE_SPL) |
f1512ee6 MA |
3386 | #if defined(_LP64) |
3387 | module_param(zfs_max_recordsize, int, 0644); | |
3388 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3389 | #else | |
3390 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3391 | module_param(zfs_max_recordsize, int, 0444); | |
3392 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3393 | #endif | |
3394 | ||
c28b2279 BB |
3395 | EXPORT_SYMBOL(dsl_dataset_hold); |
3396 | EXPORT_SYMBOL(dsl_dataset_hold_obj); | |
3397 | EXPORT_SYMBOL(dsl_dataset_own); | |
3398 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3399 | EXPORT_SYMBOL(dsl_dataset_name); | |
3400 | EXPORT_SYMBOL(dsl_dataset_rele); | |
3401 | EXPORT_SYMBOL(dsl_dataset_disown); | |
c28b2279 | 3402 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
3403 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
3404 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
3405 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
3406 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 3407 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
3408 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
3409 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
3410 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
3411 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
3412 | EXPORT_SYMBOL(dsl_dataset_set_blkptr); | |
3413 | EXPORT_SYMBOL(dsl_dataset_get_spa); | |
19580676 | 3414 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
3415 | EXPORT_SYMBOL(dsl_dataset_space_written); |
3416 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
3417 | EXPORT_SYMBOL(dsl_dataset_sync); |
3418 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3419 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
3420 | EXPORT_SYMBOL(dsl_dataset_block_freeable); | |
3421 | EXPORT_SYMBOL(dsl_dataset_prev_snap_txg); | |
3422 | EXPORT_SYMBOL(dsl_dataset_dirty); | |
3423 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3424 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3425 | EXPORT_SYMBOL(dsl_dataset_space); | |
3426 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3427 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3428 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
3429 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
3430 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 3431 | #endif |