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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. |
241b5415 | 23 | * Copyright (c) 2011, 2015 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; | |
241b5415 MA |
129 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
130 | ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = | |
131 | B_TRUE; | |
132 | } | |
34dc7c2f | 133 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
134 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
135 | compressed, uncompressed, tx); | |
136 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
137 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
138 | } |
139 | ||
b128c09f | 140 | int |
428870ff BB |
141 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
142 | boolean_t async) | |
34dc7c2f | 143 | { |
b0bc7a84 MG |
144 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
145 | int compressed = BP_GET_PSIZE(bp); | |
146 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 147 | |
34dc7c2f | 148 | if (BP_IS_HOLE(bp)) |
b128c09f | 149 | return (0); |
34dc7c2f | 150 | |
428870ff BB |
151 | ASSERT(dmu_tx_is_syncing(tx)); |
152 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
153 | ||
34dc7c2f | 154 | if (ds == NULL) { |
428870ff | 155 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
156 | dsl_pool_mos_diduse_space(tx->tx_pool, |
157 | -used, -compressed, -uncompressed); | |
b128c09f | 158 | return (used); |
34dc7c2f BB |
159 | } |
160 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
161 | ||
0c66c32d | 162 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
163 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
164 | ||
d683ddbb | 165 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
166 | int64_t delta; |
167 | ||
428870ff BB |
168 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
169 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
170 | |
171 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 172 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
173 | !DS_UNIQUE_IS_ACCURATE(ds)); |
174 | delta = parent_delta(ds, -used); | |
d683ddbb | 175 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 176 | mutex_exit(&ds->ds_lock); |
b128c09f | 177 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 178 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
179 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
180 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
181 | } else { |
182 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
183 | if (async) { |
184 | /* | |
185 | * We are here as part of zio's write done callback, | |
186 | * which means we're a zio interrupt thread. We can't | |
187 | * call dsl_deadlist_insert() now because it may block | |
188 | * waiting for I/O. Instead, put bp on the deferred | |
189 | * queue and let dsl_pool_sync() finish the job. | |
190 | */ | |
191 | bplist_append(&ds->ds_pending_deadlist, bp); | |
192 | } else { | |
193 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
194 | } | |
34dc7c2f | 195 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
196 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
197 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 198 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 199 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 200 | ds->ds_object && bp->blk_birth > |
d683ddbb | 201 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
202 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
203 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 204 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
205 | mutex_exit(&ds->ds_prev->ds_lock); |
206 | } | |
428870ff | 207 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
208 | dsl_dir_transfer_space(ds->ds_dir, used, |
209 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
210 | } | |
34dc7c2f BB |
211 | } |
212 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
213 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
214 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
215 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
216 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
217 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
218 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 219 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
220 | |
221 | return (used); | |
34dc7c2f BB |
222 | } |
223 | ||
224 | uint64_t | |
225 | dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
226 | { | |
227 | uint64_t trysnap = 0; | |
228 | ||
229 | if (ds == NULL) | |
230 | return (0); | |
231 | /* | |
232 | * The snapshot creation could fail, but that would cause an | |
233 | * incorrect FALSE return, which would only result in an | |
234 | * overestimation of the amount of space that an operation would | |
235 | * consume, which is OK. | |
236 | * | |
237 | * There's also a small window where we could miss a pending | |
238 | * snapshot, because we could set the sync task in the quiescing | |
239 | * phase. So this should only be used as a guess. | |
240 | */ | |
241 | if (ds->ds_trysnap_txg > | |
242 | spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
243 | trysnap = ds->ds_trysnap_txg; | |
d683ddbb | 244 | return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); |
34dc7c2f BB |
245 | } |
246 | ||
9babb374 | 247 | boolean_t |
428870ff BB |
248 | dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, |
249 | uint64_t blk_birth) | |
34dc7c2f | 250 | { |
b0bc7a84 MG |
251 | if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || |
252 | (bp != NULL && BP_IS_HOLE(bp))) | |
428870ff BB |
253 | return (B_FALSE); |
254 | ||
572e2857 | 255 | ddt_prefetch(dsl_dataset_get_spa(ds), bp); |
428870ff BB |
256 | |
257 | return (B_TRUE); | |
34dc7c2f BB |
258 | } |
259 | ||
34dc7c2f | 260 | static void |
0c66c32d | 261 | dsl_dataset_evict(void *dbu) |
34dc7c2f | 262 | { |
0c66c32d | 263 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 264 | |
13fe0198 | 265 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 266 | |
0c66c32d JG |
267 | ds->ds_dbuf = NULL; |
268 | ||
34dc7c2f BB |
269 | unique_remove(ds->ds_fsid_guid); |
270 | ||
428870ff BB |
271 | if (ds->ds_objset != NULL) |
272 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
273 | |
274 | if (ds->ds_prev) { | |
13fe0198 | 275 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
276 | ds->ds_prev = NULL; |
277 | } | |
278 | ||
428870ff | 279 | bplist_destroy(&ds->ds_pending_deadlist); |
0c66c32d | 280 | if (ds->ds_deadlist.dl_os != NULL) |
428870ff | 281 | dsl_deadlist_close(&ds->ds_deadlist); |
b128c09f | 282 | if (ds->ds_dir) |
0c66c32d | 283 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
284 | |
285 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
286 | ||
287 | mutex_destroy(&ds->ds_lock); | |
288 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 289 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 290 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f BB |
291 | |
292 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
293 | } | |
294 | ||
13fe0198 | 295 | int |
34dc7c2f BB |
296 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
297 | { | |
298 | dsl_dataset_phys_t *headphys; | |
299 | int err; | |
300 | dmu_buf_t *headdbuf; | |
301 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
302 | objset_t *mos = dp->dp_meta_objset; | |
303 | ||
304 | if (ds->ds_snapname[0]) | |
305 | return (0); | |
d683ddbb | 306 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
307 | return (0); |
308 | ||
d683ddbb | 309 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 310 | FTAG, &headdbuf); |
13fe0198 | 311 | if (err != 0) |
34dc7c2f BB |
312 | return (err); |
313 | headphys = headdbuf->db_data; | |
314 | err = zap_value_search(dp->dp_meta_objset, | |
315 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
316 | if (err != 0 && zfs_recover == B_TRUE) { |
317 | err = 0; | |
318 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
319 | "SNAPOBJ=%llu-ERR=%d", | |
320 | (unsigned long long)ds->ds_object, err); | |
321 | } | |
34dc7c2f BB |
322 | dmu_buf_rele(headdbuf, FTAG); |
323 | return (err); | |
324 | } | |
325 | ||
6772fb67 | 326 | int |
b128c09f | 327 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 328 | { |
b128c09f | 329 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 330 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
331 | matchtype_t mt; |
332 | int err; | |
333 | ||
d683ddbb | 334 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
335 | mt = MT_FIRST; |
336 | else | |
337 | mt = MT_EXACT; | |
338 | ||
b128c09f | 339 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f BB |
340 | value, mt, NULL, 0, NULL); |
341 | if (err == ENOTSUP && mt == MT_FIRST) | |
b128c09f | 342 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
343 | return (err); |
344 | } | |
345 | ||
13fe0198 | 346 | int |
788eb90c JJ |
347 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
348 | boolean_t adj_cnt) | |
34dc7c2f | 349 | { |
b128c09f | 350 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 351 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
352 | matchtype_t mt; |
353 | int err; | |
354 | ||
428870ff BB |
355 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
356 | ||
d683ddbb | 357 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
358 | mt = MT_FIRST; |
359 | else | |
360 | mt = MT_EXACT; | |
361 | ||
b128c09f | 362 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
34dc7c2f | 363 | if (err == ENOTSUP && mt == MT_FIRST) |
b128c09f | 364 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
365 | |
366 | if (err == 0 && adj_cnt) | |
367 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
368 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
369 | ||
34dc7c2f BB |
370 | return (err); |
371 | } | |
372 | ||
6ebebace JG |
373 | boolean_t |
374 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
375 | { | |
6186e297 JG |
376 | dmu_buf_t *dbuf = ds->ds_dbuf; |
377 | boolean_t result = B_FALSE; | |
378 | ||
379 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
380 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
381 | ||
382 | if (ds == dmu_buf_get_user(dbuf)) | |
383 | result = B_TRUE; | |
384 | else | |
385 | dmu_buf_rele(dbuf, tag); | |
386 | } | |
387 | ||
388 | return (result); | |
6ebebace JG |
389 | } |
390 | ||
13fe0198 MA |
391 | int |
392 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, | |
b128c09f | 393 | dsl_dataset_t **dsp) |
34dc7c2f | 394 | { |
34dc7c2f BB |
395 | objset_t *mos = dp->dp_meta_objset; |
396 | dmu_buf_t *dbuf; | |
397 | dsl_dataset_t *ds; | |
398 | int err; | |
572e2857 | 399 | dmu_object_info_t doi; |
34dc7c2f | 400 | |
13fe0198 | 401 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
402 | |
403 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 404 | if (err != 0) |
34dc7c2f | 405 | return (err); |
572e2857 BB |
406 | |
407 | /* Make sure dsobj has the correct object type. */ | |
408 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 409 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 410 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 411 | return (SET_ERROR(EINVAL)); |
3a84951d | 412 | } |
572e2857 | 413 | |
34dc7c2f BB |
414 | ds = dmu_buf_get_user(dbuf); |
415 | if (ds == NULL) { | |
d4ed6673 | 416 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 417 | |
79c76d5b | 418 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
419 | ds->ds_dbuf = dbuf; |
420 | ds->ds_object = dsobj; | |
0c66c32d | 421 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 422 | list_link_init(&ds->ds_synced_link); |
34dc7c2f BB |
423 | |
424 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
425 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 426 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
13fe0198 | 427 | refcount_create(&ds->ds_longholds); |
34dc7c2f | 428 | |
428870ff BB |
429 | bplist_create(&ds->ds_pending_deadlist); |
430 | dsl_deadlist_open(&ds->ds_deadlist, | |
d683ddbb | 431 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); |
428870ff | 432 | |
37abac6d BP |
433 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
434 | offsetof(dmu_sendarg_t, dsa_link)); | |
435 | ||
f1512ee6 | 436 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
437 | spa_feature_t f; |
438 | ||
439 | for (f = 0; f < SPA_FEATURES; f++) { | |
440 | if (!(spa_feature_table[f].fi_flags & | |
441 | ZFEATURE_FLAG_PER_DATASET)) | |
442 | continue; | |
443 | err = zap_contains(mos, dsobj, | |
444 | spa_feature_table[f].fi_guid); | |
445 | if (err == 0) { | |
446 | ds->ds_feature_inuse[f] = B_TRUE; | |
447 | } else { | |
448 | ASSERT3U(err, ==, ENOENT); | |
449 | err = 0; | |
450 | } | |
19b3b1d2 | 451 | } |
f1512ee6 MA |
452 | } |
453 | ||
241b5415 MA |
454 | err = dsl_dir_hold_obj(dp, |
455 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
13fe0198 | 456 | if (err != 0) { |
34dc7c2f BB |
457 | mutex_destroy(&ds->ds_lock); |
458 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 459 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 460 | refcount_destroy(&ds->ds_longholds); |
428870ff BB |
461 | bplist_destroy(&ds->ds_pending_deadlist); |
462 | dsl_deadlist_close(&ds->ds_deadlist); | |
34dc7c2f BB |
463 | kmem_free(ds, sizeof (dsl_dataset_t)); |
464 | dmu_buf_rele(dbuf, tag); | |
465 | return (err); | |
466 | } | |
467 | ||
0c66c32d | 468 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 469 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 470 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 471 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 472 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 473 | ds, &ds->ds_prev); |
34dc7c2f | 474 | } |
da536844 MA |
475 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
476 | int zaperr = zap_lookup(mos, ds->ds_object, | |
477 | DS_FIELD_BOOKMARK_NAMES, | |
478 | sizeof (ds->ds_bookmarks), 1, | |
479 | &ds->ds_bookmarks); | |
480 | if (zaperr != ENOENT) | |
481 | VERIFY0(zaperr); | |
482 | } | |
45d1cae3 BB |
483 | } else { |
484 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
485 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
486 | if (err == 0 && |
487 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
488 | err = zap_count( |
489 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 490 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
491 | &ds->ds_userrefs); |
492 | } | |
34dc7c2f BB |
493 | } |
494 | ||
0c66c32d | 495 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
496 | err = dsl_prop_get_int_ds(ds, |
497 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
498 | &ds->ds_reserved); | |
34dc7c2f | 499 | if (err == 0) { |
13fe0198 MA |
500 | err = dsl_prop_get_int_ds(ds, |
501 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
502 | &ds->ds_quota); | |
34dc7c2f | 503 | } |
34dc7c2f BB |
504 | } else { |
505 | ds->ds_reserved = ds->ds_quota = 0; | |
506 | } | |
507 | ||
0c66c32d JG |
508 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); |
509 | if (err == 0) | |
510 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
511 | ||
512 | if (err != 0 || winner != NULL) { | |
428870ff BB |
513 | bplist_destroy(&ds->ds_pending_deadlist); |
514 | dsl_deadlist_close(&ds->ds_deadlist); | |
b128c09f | 515 | if (ds->ds_prev) |
13fe0198 MA |
516 | dsl_dataset_rele(ds->ds_prev, ds); |
517 | dsl_dir_rele(ds->ds_dir, ds); | |
34dc7c2f BB |
518 | mutex_destroy(&ds->ds_lock); |
519 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 520 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 521 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f | 522 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 523 | if (err != 0) { |
34dc7c2f BB |
524 | dmu_buf_rele(dbuf, tag); |
525 | return (err); | |
526 | } | |
527 | ds = winner; | |
528 | } else { | |
529 | ds->ds_fsid_guid = | |
d683ddbb | 530 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
34dc7c2f BB |
531 | } |
532 | } | |
533 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
d683ddbb JG |
534 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
535 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
536 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
537 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f BB |
538 | *dsp = ds; |
539 | return (0); | |
540 | } | |
541 | ||
b128c09f | 542 | int |
13fe0198 | 543 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, |
428870ff | 544 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
545 | { |
546 | dsl_dir_t *dd; | |
b128c09f | 547 | const char *snapname; |
34dc7c2f | 548 | uint64_t obj; |
34dc7c2f BB |
549 | int err = 0; |
550 | ||
13fe0198 MA |
551 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
552 | if (err != 0) | |
34dc7c2f BB |
553 | return (err); |
554 | ||
13fe0198 | 555 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 556 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 MA |
557 | if (obj != 0) |
558 | err = dsl_dataset_hold_obj(dp, obj, tag, dsp); | |
b128c09f | 559 | else |
2e528b49 | 560 | err = SET_ERROR(ENOENT); |
34dc7c2f | 561 | |
b128c09f BB |
562 | /* we may be looking for a snapshot */ |
563 | if (err == 0 && snapname != NULL) { | |
13fe0198 | 564 | dsl_dataset_t *ds; |
34dc7c2f | 565 | |
b128c09f BB |
566 | if (*snapname++ != '@') { |
567 | dsl_dataset_rele(*dsp, tag); | |
13fe0198 | 568 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 569 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 570 | } |
34dc7c2f | 571 | |
b128c09f BB |
572 | dprintf("looking for snapshot '%s'\n", snapname); |
573 | err = dsl_dataset_snap_lookup(*dsp, snapname, &obj); | |
574 | if (err == 0) | |
13fe0198 | 575 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
b128c09f BB |
576 | dsl_dataset_rele(*dsp, tag); |
577 | ||
13fe0198 | 578 | if (err == 0) { |
b128c09f BB |
579 | mutex_enter(&ds->ds_lock); |
580 | if (ds->ds_snapname[0] == 0) | |
581 | (void) strlcpy(ds->ds_snapname, snapname, | |
582 | sizeof (ds->ds_snapname)); | |
583 | mutex_exit(&ds->ds_lock); | |
13fe0198 | 584 | *dsp = ds; |
34dc7c2f | 585 | } |
34dc7c2f | 586 | } |
13fe0198 MA |
587 | |
588 | dsl_dir_rele(dd, FTAG); | |
34dc7c2f BB |
589 | return (err); |
590 | } | |
591 | ||
592 | int | |
13fe0198 | 593 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, |
428870ff | 594 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 595 | { |
13fe0198 MA |
596 | int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); |
597 | if (err != 0) | |
598 | return (err); | |
599 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
600 | dsl_dataset_rele(*dsp, tag); | |
601 | *dsp = NULL; | |
2e528b49 | 602 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
603 | } |
604 | return (0); | |
605 | } | |
606 | ||
607 | int | |
608 | dsl_dataset_own(dsl_pool_t *dp, const char *name, | |
609 | void *tag, dsl_dataset_t **dsp) | |
610 | { | |
611 | int err = dsl_dataset_hold(dp, name, tag, dsp); | |
612 | if (err != 0) | |
b128c09f | 613 | return (err); |
13fe0198 | 614 | if (!dsl_dataset_tryown(*dsp, tag)) { |
428870ff | 615 | dsl_dataset_rele(*dsp, tag); |
2e528b49 | 616 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
617 | } |
618 | return (0); | |
34dc7c2f BB |
619 | } |
620 | ||
13fe0198 MA |
621 | /* |
622 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
623 | * hold is used to prevent destruction of a dataset while the pool hold | |
624 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
625 | * | |
626 | * The dataset and pool must be held when this function is called. After it | |
627 | * is called, the pool hold may be released while the dataset is still held | |
628 | * and accessed. | |
629 | */ | |
630 | void | |
631 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
632 | { | |
633 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
634 | (void) refcount_add(&ds->ds_longholds, tag); | |
635 | } | |
636 | ||
637 | void | |
638 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
639 | { | |
640 | (void) refcount_remove(&ds->ds_longholds, tag); | |
641 | } | |
642 | ||
643 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
644 | boolean_t | |
645 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
646 | { | |
647 | return (!refcount_is_zero(&ds->ds_longholds)); | |
648 | } | |
649 | ||
34dc7c2f BB |
650 | void |
651 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
652 | { | |
653 | if (ds == NULL) { | |
654 | (void) strcpy(name, "mos"); | |
655 | } else { | |
656 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 657 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f BB |
658 | if (ds->ds_snapname[0]) { |
659 | (void) strcat(name, "@"); | |
b128c09f BB |
660 | /* |
661 | * We use a "recursive" mutex so that we | |
662 | * can call dprintf_ds() with ds_lock held. | |
663 | */ | |
34dc7c2f | 664 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f BB |
665 | mutex_enter(&ds->ds_lock); |
666 | (void) strcat(name, ds->ds_snapname); | |
667 | mutex_exit(&ds->ds_lock); | |
668 | } else { | |
669 | (void) strcat(name, ds->ds_snapname); | |
670 | } | |
671 | } | |
672 | } | |
673 | } | |
674 | ||
34dc7c2f | 675 | void |
b128c09f BB |
676 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
677 | { | |
13fe0198 | 678 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
679 | } |
680 | ||
681 | void | |
428870ff | 682 | dsl_dataset_disown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 683 | { |
945dd935 JG |
684 | ASSERT3P(ds->ds_owner, ==, tag); |
685 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 686 | |
34dc7c2f | 687 | mutex_enter(&ds->ds_lock); |
b128c09f | 688 | ds->ds_owner = NULL; |
34dc7c2f | 689 | mutex_exit(&ds->ds_lock); |
13fe0198 | 690 | dsl_dataset_long_rele(ds, tag); |
945dd935 | 691 | dsl_dataset_rele(ds, tag); |
34dc7c2f BB |
692 | } |
693 | ||
694 | boolean_t | |
13fe0198 | 695 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 696 | { |
b128c09f BB |
697 | boolean_t gotit = FALSE; |
698 | ||
34dc7c2f | 699 | mutex_enter(&ds->ds_lock); |
13fe0198 | 700 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 701 | ds->ds_owner = tag; |
13fe0198 | 702 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 703 | gotit = TRUE; |
34dc7c2f BB |
704 | } |
705 | mutex_exit(&ds->ds_lock); | |
b128c09f | 706 | return (gotit); |
34dc7c2f BB |
707 | } |
708 | ||
241b5415 MA |
709 | static void |
710 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
711 | { | |
712 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
713 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
714 | uint64_t zero = 0; | |
715 | ||
716 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
717 | ||
718 | spa_feature_incr(spa, f, tx); | |
719 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
720 | ||
721 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
722 | sizeof (zero), 1, &zero, tx)); | |
723 | } | |
724 | ||
725 | void | |
726 | dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
727 | { | |
728 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
729 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
730 | ||
731 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
732 | ||
733 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
734 | spa_feature_decr(spa, f, tx); | |
735 | } | |
736 | ||
34dc7c2f | 737 | uint64_t |
b128c09f | 738 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
34dc7c2f BB |
739 | uint64_t flags, dmu_tx_t *tx) |
740 | { | |
741 | dsl_pool_t *dp = dd->dd_pool; | |
742 | dmu_buf_t *dbuf; | |
743 | dsl_dataset_phys_t *dsphys; | |
744 | uint64_t dsobj; | |
745 | objset_t *mos = dp->dp_meta_objset; | |
746 | ||
b128c09f BB |
747 | if (origin == NULL) |
748 | origin = dp->dp_origin_snap; | |
749 | ||
34dc7c2f | 750 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 751 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 752 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 753 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
754 | |
755 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
756 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 757 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
758 | dmu_buf_will_dirty(dbuf, tx); |
759 | dsphys = dbuf->db_data; | |
b128c09f | 760 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
761 | dsphys->ds_dir_obj = dd->dd_object; |
762 | dsphys->ds_flags = flags; | |
763 | dsphys->ds_fsid_guid = unique_create(); | |
764 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
765 | sizeof (dsphys->ds_guid)); | |
766 | dsphys->ds_snapnames_zapobj = | |
767 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
768 | DMU_OT_NONE, 0, tx); | |
769 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 770 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 771 | |
428870ff BB |
772 | if (origin == NULL) { |
773 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
774 | } else { | |
241b5415 | 775 | spa_feature_t f; |
13fe0198 | 776 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 777 | |
34dc7c2f BB |
778 | dsphys->ds_prev_snap_obj = origin->ds_object; |
779 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 780 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 781 | dsphys->ds_referenced_bytes = |
d683ddbb | 782 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 783 | dsphys->ds_compressed_bytes = |
d683ddbb | 784 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 785 | dsphys->ds_uncompressed_bytes = |
d683ddbb JG |
786 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
787 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; | |
4b20a6f5 MA |
788 | |
789 | /* | |
790 | * Inherit flags that describe the dataset's contents | |
791 | * (INCONSISTENT) or properties (Case Insensitive). | |
792 | */ | |
d683ddbb | 793 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 794 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 795 | |
241b5415 MA |
796 | for (f = 0; f < SPA_FEATURES; f++) { |
797 | if (origin->ds_feature_inuse[f]) | |
798 | dsl_dataset_activate_feature(dsobj, f, tx); | |
799 | } | |
f1512ee6 | 800 | |
34dc7c2f | 801 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 802 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 803 | |
13fe0198 | 804 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
805 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
806 | FTAG, &ohds)); | |
428870ff BB |
807 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
808 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
809 | dsl_dataset_rele(ohds, FTAG); | |
810 | ||
b128c09f | 811 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
812 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
813 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
814 | zap_create(mos, |
815 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
816 | } | |
13fe0198 | 817 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
818 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
819 | dsobj, tx)); | |
b128c09f BB |
820 | } |
821 | ||
34dc7c2f | 822 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 823 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 824 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 825 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 826 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 827 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
828 | zap_create(mos, |
829 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
830 | } | |
13fe0198 | 831 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
832 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
833 | dsobj, tx)); | |
428870ff | 834 | } |
34dc7c2f BB |
835 | } |
836 | ||
837 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
838 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
839 | ||
840 | dmu_buf_rele(dbuf, FTAG); | |
841 | ||
842 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 843 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
844 | |
845 | return (dsobj); | |
846 | } | |
847 | ||
13fe0198 MA |
848 | static void |
849 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
850 | { | |
851 | objset_t *os; | |
852 | ||
853 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
854 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
855 | dsl_dataset_dirty(ds, tx); | |
856 | } | |
857 | ||
34dc7c2f BB |
858 | uint64_t |
859 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
860 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) | |
861 | { | |
862 | dsl_pool_t *dp = pdd->dd_pool; | |
863 | uint64_t dsobj, ddobj; | |
864 | dsl_dir_t *dd; | |
865 | ||
13fe0198 | 866 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
867 | ASSERT(lastname[0] != '@'); |
868 | ||
b128c09f | 869 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 870 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 871 | |
13fe0198 MA |
872 | dsobj = dsl_dataset_create_sync_dd(dd, origin, |
873 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); | |
34dc7c2f BB |
874 | |
875 | dsl_deleg_set_create_perms(dd, tx, cr); | |
876 | ||
788eb90c JJ |
877 | /* |
878 | * Since we're creating a new node we know it's a leaf, so we can | |
879 | * initialize the counts if the limit feature is active. | |
880 | */ | |
881 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
882 | uint64_t cnt = 0; | |
883 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
884 | ||
885 | dsl_dir_zapify(dd, tx); | |
886 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
887 | sizeof (cnt), 1, &cnt, tx)); | |
888 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
889 | sizeof (cnt), 1, &cnt, tx)); | |
890 | } | |
891 | ||
13fe0198 | 892 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 893 | |
572e2857 BB |
894 | /* |
895 | * If we are creating a clone, make sure we zero out any stale | |
896 | * data from the origin snapshots zil header. | |
897 | */ | |
13fe0198 | 898 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 899 | dsl_dataset_t *ds; |
572e2857 | 900 | |
13fe0198 MA |
901 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
902 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
903 | dsl_dataset_rele(ds, FTAG); |
904 | } | |
905 | ||
34dc7c2f BB |
906 | return (dsobj); |
907 | } | |
908 | ||
34dc7c2f | 909 | /* |
13fe0198 MA |
910 | * The unique space in the head dataset can be calculated by subtracting |
911 | * the space used in the most recent snapshot, that is still being used | |
912 | * in this file system, from the space currently in use. To figure out | |
913 | * the space in the most recent snapshot still in use, we need to take | |
914 | * the total space used in the snapshot and subtract out the space that | |
915 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 916 | */ |
13fe0198 MA |
917 | void |
918 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 919 | { |
13fe0198 MA |
920 | uint64_t mrs_used; |
921 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 922 | |
0c66c32d | 923 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 924 | |
d683ddbb JG |
925 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
926 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
927 | else |
928 | mrs_used = 0; | |
45d1cae3 | 929 | |
13fe0198 | 930 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 931 | |
13fe0198 | 932 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
933 | dsl_dataset_phys(ds)->ds_unique_bytes = |
934 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 935 | |
13fe0198 MA |
936 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
937 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 938 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
939 | } |
940 | ||
13fe0198 MA |
941 | void |
942 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
943 | dmu_tx_t *tx) | |
45d1cae3 | 944 | { |
13fe0198 MA |
945 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
946 | int err; | |
947 | ASSERTV(uint64_t count); | |
948 | ||
d683ddbb JG |
949 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
950 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
951 | obj, tx); | |
13fe0198 MA |
952 | /* |
953 | * The err should not be ENOENT, but a bug in a previous version | |
954 | * of the code could cause upgrade_clones_cb() to not set | |
955 | * ds_next_snap_obj when it should, leading to a missing entry. | |
956 | * If we knew that the pool was created after | |
957 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
958 | * ENOENT. However, at least we can check that we don't have | |
959 | * too many entries in the next_clones_obj even after failing to | |
960 | * remove this one. | |
961 | */ | |
962 | if (err != ENOENT) | |
963 | VERIFY0(err); | |
d683ddbb | 964 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 965 | &count)); |
d683ddbb | 966 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 967 | } |
45d1cae3 | 968 | |
45d1cae3 | 969 | |
13fe0198 MA |
970 | blkptr_t * |
971 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
972 | { | |
d683ddbb | 973 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
974 | } |
975 | ||
13fe0198 MA |
976 | void |
977 | dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
45d1cae3 | 978 | { |
13fe0198 MA |
979 | ASSERT(dmu_tx_is_syncing(tx)); |
980 | /* If it's the meta-objset, set dp_meta_rootbp */ | |
981 | if (ds == NULL) { | |
982 | tx->tx_pool->dp_meta_rootbp = *bp; | |
983 | } else { | |
984 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 985 | dsl_dataset_phys(ds)->ds_bp = *bp; |
45d1cae3 | 986 | } |
13fe0198 | 987 | } |
45d1cae3 | 988 | |
13fe0198 MA |
989 | spa_t * |
990 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
991 | { | |
992 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
993 | } |
994 | ||
13fe0198 MA |
995 | void |
996 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 997 | { |
13fe0198 | 998 | dsl_pool_t *dp; |
45d1cae3 | 999 | |
13fe0198 MA |
1000 | if (ds == NULL) /* this is the meta-objset */ |
1001 | return; | |
34dc7c2f | 1002 | |
428870ff | 1003 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1004 | |
d683ddbb | 1005 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1006 | panic("dirtying snapshot!"); |
1007 | ||
1008 | dp = ds->ds_dir->dd_pool; | |
1009 | ||
13fe0198 | 1010 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
34dc7c2f BB |
1011 | /* up the hold count until we can be written out */ |
1012 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1013 | } | |
1014 | } | |
1015 | ||
04434775 MA |
1016 | boolean_t |
1017 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
1018 | { | |
1019 | int t; | |
1020 | ||
1021 | for (t = 0; t < TXG_SIZE; t++) { | |
1022 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1023 | ds, t)) | |
1024 | return (B_TRUE); | |
1025 | } | |
1026 | return (B_FALSE); | |
1027 | } | |
1028 | ||
34dc7c2f | 1029 | static int |
13fe0198 | 1030 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1031 | { |
13fe0198 | 1032 | uint64_t asize; |
34dc7c2f | 1033 | |
13fe0198 | 1034 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1035 | return (0); |
1036 | ||
34dc7c2f | 1037 | /* |
13fe0198 MA |
1038 | * If there's an fs-only reservation, any blocks that might become |
1039 | * owned by the snapshot dataset must be accommodated by space | |
1040 | * outside of the reservation. | |
34dc7c2f | 1041 | */ |
13fe0198 | 1042 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1043 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1044 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1045 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1046 | |
1047 | /* | |
13fe0198 MA |
1048 | * Propagate any reserved space for this snapshot to other |
1049 | * snapshot checks in this sync group. | |
34dc7c2f | 1050 | */ |
13fe0198 MA |
1051 | if (asize > 0) |
1052 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1053 | |
1054 | return (0); | |
1055 | } | |
1056 | ||
13fe0198 MA |
1057 | typedef struct dsl_dataset_snapshot_arg { |
1058 | nvlist_t *ddsa_snaps; | |
1059 | nvlist_t *ddsa_props; | |
1060 | nvlist_t *ddsa_errors; | |
788eb90c | 1061 | cred_t *ddsa_cr; |
13fe0198 | 1062 | } dsl_dataset_snapshot_arg_t; |
45d1cae3 | 1063 | |
34dc7c2f | 1064 | int |
13fe0198 | 1065 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1066 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1067 | { |
13fe0198 MA |
1068 | int error; |
1069 | uint64_t value; | |
34dc7c2f | 1070 | |
13fe0198 | 1071 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1072 | |
13fe0198 | 1073 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1074 | return (0); |
34dc7c2f BB |
1075 | |
1076 | /* | |
13fe0198 MA |
1077 | * We don't allow multiple snapshots of the same txg. If there |
1078 | * is already one, try again. | |
34dc7c2f | 1079 | */ |
d683ddbb | 1080 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1081 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1082 | |
1083 | /* | |
13fe0198 | 1084 | * Check for conflicting snapshot name. |
34dc7c2f | 1085 | */ |
13fe0198 MA |
1086 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1087 | if (error == 0) | |
2e528b49 | 1088 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1089 | if (error != ENOENT) |
1090 | return (error); | |
45d1cae3 | 1091 | |
96c2e961 KW |
1092 | /* |
1093 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1094 | * those into which we are currently receiving. However, if we are | |
1095 | * creating this snapshot as part of a receive, this check will be | |
1096 | * executed atomically with respect to the completion of the receive | |
1097 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1098 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1099 | * dmu_recv_end_sync(). | |
1100 | */ | |
1101 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1102 | return (SET_ERROR(EBUSY)); | |
1103 | ||
788eb90c JJ |
1104 | /* |
1105 | * Skip the check for temporary snapshots or if we have already checked | |
1106 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1107 | * check the count here when we're receiving a stream. | |
1108 | */ | |
1109 | if (cnt != 0 && cr != NULL) { | |
1110 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1111 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1112 | if (error != 0) | |
1113 | return (error); | |
1114 | } | |
1115 | ||
13fe0198 MA |
1116 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1117 | if (error != 0) | |
1118 | return (error); | |
45d1cae3 | 1119 | |
34dc7c2f BB |
1120 | return (0); |
1121 | } | |
1122 | ||
13fe0198 MA |
1123 | static int |
1124 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
b128c09f | 1125 | { |
13fe0198 MA |
1126 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1127 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1128 | nvpair_t *pair; | |
1129 | int rv = 0; | |
b128c09f | 1130 | |
788eb90c JJ |
1131 | /* |
1132 | * Pre-compute how many total new snapshots will be created for each | |
1133 | * level in the tree and below. This is needed for validating the | |
1134 | * snapshot limit when either taking a recursive snapshot or when | |
1135 | * taking multiple snapshots. | |
1136 | * | |
1137 | * The problem is that the counts are not actually adjusted when | |
1138 | * we are checking, only when we finally sync. For a single snapshot, | |
1139 | * this is easy, the count will increase by 1 at each node up the tree, | |
1140 | * but its more complicated for the recursive/multiple snapshot case. | |
1141 | * | |
1142 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1143 | * at each level up the tree but since it is validating each snapshot | |
1144 | * independently we need to be sure that we are validating the complete | |
1145 | * count for the entire set of snapshots. We do this by rolling up the | |
1146 | * counts for each component of the name into an nvlist and then | |
1147 | * checking each of those cases with the aggregated count. | |
1148 | * | |
1149 | * This approach properly handles not only the recursive snapshot | |
1150 | * case (where we get all of those on the ddsa_snaps list) but also | |
1151 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1152 | * validate the limit on 'a' using a count of 2). | |
1153 | * | |
1154 | * We validate the snapshot names in the third loop and only report | |
1155 | * name errors once. | |
1156 | */ | |
1157 | if (dmu_tx_is_syncing(tx)) { | |
1158 | char *nm; | |
1159 | nvlist_t *cnt_track = NULL; | |
1160 | cnt_track = fnvlist_alloc(); | |
1161 | ||
1162 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1163 | ||
1164 | /* Rollup aggregated counts into the cnt_track list */ | |
1165 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1166 | pair != NULL; | |
1167 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1168 | char *pdelim; | |
1169 | uint64_t val; | |
1170 | ||
1171 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1172 | pdelim = strchr(nm, '@'); | |
1173 | if (pdelim == NULL) | |
1174 | continue; | |
1175 | *pdelim = '\0'; | |
1176 | ||
1177 | do { | |
1178 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1179 | &val) == 0) { | |
1180 | /* update existing entry */ | |
1181 | fnvlist_add_uint64(cnt_track, nm, | |
1182 | val + 1); | |
1183 | } else { | |
1184 | /* add to list */ | |
1185 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1186 | } | |
1187 | ||
1188 | pdelim = strrchr(nm, '/'); | |
1189 | if (pdelim != NULL) | |
1190 | *pdelim = '\0'; | |
1191 | } while (pdelim != NULL); | |
1192 | } | |
1193 | ||
1194 | kmem_free(nm, MAXPATHLEN); | |
1195 | ||
1196 | /* Check aggregated counts at each level */ | |
1197 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1198 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1199 | int error = 0; | |
1200 | char *name; | |
1201 | uint64_t cnt = 0; | |
1202 | dsl_dataset_t *ds; | |
1203 | ||
1204 | name = nvpair_name(pair); | |
1205 | cnt = fnvpair_value_uint64(pair); | |
1206 | ASSERT(cnt > 0); | |
1207 | ||
1208 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1209 | if (error == 0) { | |
1210 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1211 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1212 | ddsa->ddsa_cr); | |
1213 | dsl_dataset_rele(ds, FTAG); | |
1214 | } | |
1215 | ||
1216 | if (error != 0) { | |
1217 | if (ddsa->ddsa_errors != NULL) | |
1218 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1219 | name, error); | |
1220 | rv = error; | |
1221 | /* only report one error for this check */ | |
1222 | break; | |
1223 | } | |
1224 | } | |
1225 | nvlist_free(cnt_track); | |
1226 | } | |
1227 | ||
13fe0198 MA |
1228 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1229 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1230 | int error = 0; | |
1231 | dsl_dataset_t *ds; | |
1232 | char *name, *atp; | |
1233 | char dsname[MAXNAMELEN]; | |
1234 | ||
1235 | name = nvpair_name(pair); | |
1236 | if (strlen(name) >= MAXNAMELEN) | |
2e528b49 | 1237 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1238 | if (error == 0) { |
1239 | atp = strchr(name, '@'); | |
1240 | if (atp == NULL) | |
2e528b49 | 1241 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1242 | if (error == 0) |
1243 | (void) strlcpy(dsname, name, atp - name + 1); | |
1244 | } | |
1245 | if (error == 0) | |
1246 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1247 | if (error == 0) { | |
788eb90c | 1248 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1249 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1250 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1251 | dsl_dataset_rele(ds, FTAG); |
1252 | } | |
b128c09f | 1253 | |
13fe0198 MA |
1254 | if (error != 0) { |
1255 | if (ddsa->ddsa_errors != NULL) { | |
1256 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1257 | name, error); | |
1258 | } | |
1259 | rv = error; | |
1260 | } | |
1261 | } | |
788eb90c | 1262 | |
13fe0198 | 1263 | return (rv); |
b128c09f BB |
1264 | } |
1265 | ||
13fe0198 MA |
1266 | void |
1267 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1268 | dmu_tx_t *tx) | |
428870ff | 1269 | { |
13fe0198 MA |
1270 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1271 | dmu_buf_t *dbuf; | |
1272 | dsl_dataset_phys_t *dsphys; | |
1273 | uint64_t dsobj, crtxg; | |
1274 | objset_t *mos = dp->dp_meta_objset; | |
241b5415 | 1275 | spa_feature_t f; |
13fe0198 MA |
1276 | ASSERTV(static zil_header_t zero_zil); |
1277 | ASSERTV(objset_t *os); | |
1278 | ||
1279 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1280 | |
428870ff | 1281 | /* |
13fe0198 MA |
1282 | * If we are on an old pool, the zil must not be active, in which |
1283 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1284 | */ |
13fe0198 MA |
1285 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1286 | dmu_objset_from_ds(ds, &os) != 0 || | |
1287 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1288 | sizeof (zero_zil)) == 0); | |
428870ff | 1289 | |
788eb90c | 1290 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1291 | |
1292 | /* | |
13fe0198 | 1293 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1294 | */ |
1295 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1296 | crtxg = 1; | |
1297 | else | |
1298 | crtxg = tx->tx_txg; | |
1299 | ||
34dc7c2f BB |
1300 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1301 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1302 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1303 | dmu_buf_will_dirty(dbuf, tx); |
1304 | dsphys = dbuf->db_data; | |
b128c09f | 1305 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1306 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1307 | dsphys->ds_fsid_guid = unique_create(); | |
1308 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1309 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1310 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1311 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1312 | dsphys->ds_next_snap_obj = ds->ds_object; |
1313 | dsphys->ds_num_children = 1; | |
1314 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1315 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1316 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1317 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1318 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1319 | dsphys->ds_uncompressed_bytes = | |
1320 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1321 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
1322 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; | |
34dc7c2f BB |
1323 | dmu_buf_rele(dbuf, FTAG); |
1324 | ||
241b5415 MA |
1325 | for (f = 0; f < SPA_FEATURES; f++) { |
1326 | if (ds->ds_feature_inuse[f]) | |
1327 | dsl_dataset_activate_feature(dsobj, f, tx); | |
1328 | } | |
f1512ee6 | 1329 | |
d683ddbb JG |
1330 | ASSERT3U(ds->ds_prev != 0, ==, |
1331 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1332 | if (ds->ds_prev) { |
b128c09f | 1333 | uint64_t next_clones_obj = |
d683ddbb JG |
1334 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1335 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1336 | ds->ds_object || |
d683ddbb JG |
1337 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1338 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1339 | ds->ds_object) { | |
34dc7c2f | 1340 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1341 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1342 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1343 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1344 | } else if (next_clones_obj != 0) { |
13fe0198 | 1345 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1346 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1347 | VERIFY0(zap_add_int(mos, |
b128c09f | 1348 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1349 | } |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * If we have a reference-reservation on this dataset, we will | |
1354 | * need to increase the amount of refreservation being charged | |
1355 | * since our unique space is going to zero. | |
1356 | */ | |
1357 | if (ds->ds_reserved) { | |
428870ff BB |
1358 | int64_t delta; |
1359 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1360 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1361 | ds->ds_reserved); | |
b128c09f | 1362 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1363 | delta, 0, 0, tx); |
34dc7c2f BB |
1364 | } |
1365 | ||
34dc7c2f | 1366 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1367 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1368 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1369 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1370 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1371 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1372 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1373 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1374 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1375 | |
d683ddbb JG |
1376 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1377 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1378 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1379 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
34dc7c2f | 1380 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1381 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1382 | |
d683ddbb | 1383 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1384 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1385 | |
1386 | if (ds->ds_prev) | |
13fe0198 MA |
1387 | dsl_dataset_rele(ds->ds_prev, ds); |
1388 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1389 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1390 | |
428870ff BB |
1391 | dsl_scan_ds_snapshotted(ds, tx); |
1392 | ||
1393 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1394 | |
6f1ffb06 | 1395 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1396 | } |
1397 | ||
13fe0198 MA |
1398 | static void |
1399 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1400 | { |
13fe0198 MA |
1401 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1402 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1403 | nvpair_t *pair; | |
34dc7c2f | 1404 | |
13fe0198 MA |
1405 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1406 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1407 | dsl_dataset_t *ds; | |
1408 | char *name, *atp; | |
1409 | char dsname[MAXNAMELEN]; | |
1410 | ||
1411 | name = nvpair_name(pair); | |
1412 | atp = strchr(name, '@'); | |
1413 | (void) strlcpy(dsname, name, atp - name + 1); | |
1414 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1415 | ||
1416 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1417 | if (ddsa->ddsa_props != NULL) { | |
1418 | dsl_props_set_sync_impl(ds->ds_prev, | |
1419 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1420 | } | |
1421 | dsl_dataset_rele(ds, FTAG); | |
1422 | } | |
34dc7c2f BB |
1423 | } |
1424 | ||
13fe0198 MA |
1425 | /* |
1426 | * The snapshots must all be in the same pool. | |
1427 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1428 | */ | |
1429 | int | |
1430 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1431 | { |
13fe0198 MA |
1432 | dsl_dataset_snapshot_arg_t ddsa; |
1433 | nvpair_t *pair; | |
1434 | boolean_t needsuspend; | |
1435 | int error; | |
1436 | spa_t *spa; | |
1437 | char *firstname; | |
1438 | nvlist_t *suspended = NULL; | |
330d06f9 | 1439 | |
13fe0198 MA |
1440 | pair = nvlist_next_nvpair(snaps, NULL); |
1441 | if (pair == NULL) | |
1442 | return (0); | |
1443 | firstname = nvpair_name(pair); | |
1444 | ||
1445 | error = spa_open(firstname, &spa, FTAG); | |
1446 | if (error != 0) | |
1447 | return (error); | |
1448 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1449 | spa_close(spa, FTAG); | |
1450 | ||
1451 | if (needsuspend) { | |
1452 | suspended = fnvlist_alloc(); | |
1453 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1454 | pair = nvlist_next_nvpair(snaps, pair)) { | |
1455 | char fsname[MAXNAMELEN]; | |
1456 | char *snapname = nvpair_name(pair); | |
1457 | char *atp; | |
1458 | void *cookie; | |
1459 | ||
1460 | atp = strchr(snapname, '@'); | |
1461 | if (atp == NULL) { | |
2e528b49 | 1462 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1463 | break; |
1464 | } | |
1465 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1466 | ||
1467 | error = zil_suspend(fsname, &cookie); | |
1468 | if (error != 0) | |
1469 | break; | |
1470 | fnvlist_add_uint64(suspended, fsname, | |
1471 | (uintptr_t)cookie); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | ddsa.ddsa_snaps = snaps; | |
1476 | ddsa.ddsa_props = props; | |
1477 | ddsa.ddsa_errors = errors; | |
788eb90c | 1478 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1479 | |
1480 | if (error == 0) { | |
1481 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1482 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1483 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1484 | } |
1485 | ||
1486 | if (suspended != NULL) { | |
1487 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1488 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1489 | zil_resume((void *)(uintptr_t) | |
1490 | fnvpair_value_uint64(pair)); | |
1491 | } | |
1492 | fnvlist_free(suspended); | |
1493 | } | |
1494 | ||
ba6a2402 BB |
1495 | #ifdef _KERNEL |
1496 | if (error == 0) { | |
1497 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
d1d7e268 | 1498 | pair = nvlist_next_nvpair(snaps, pair)) { |
ba6a2402 BB |
1499 | char *snapname = nvpair_name(pair); |
1500 | zvol_create_minors(snapname); | |
1501 | } | |
1502 | } | |
1503 | #endif | |
1504 | ||
13fe0198 MA |
1505 | return (error); |
1506 | } | |
1507 | ||
1508 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1509 | const char *ddsta_fsname; | |
1510 | const char *ddsta_snapname; | |
1511 | minor_t ddsta_cleanup_minor; | |
1512 | const char *ddsta_htag; | |
1513 | } dsl_dataset_snapshot_tmp_arg_t; | |
1514 | ||
1515 | static int | |
1516 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1517 | { | |
1518 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1519 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1520 | dsl_dataset_t *ds; | |
1521 | int error; | |
1522 | ||
1523 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1524 | if (error != 0) | |
1525 | return (error); | |
1526 | ||
788eb90c | 1527 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1528 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1529 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1530 | if (error != 0) { |
1531 | dsl_dataset_rele(ds, FTAG); | |
1532 | return (error); | |
1533 | } | |
1534 | ||
1535 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1536 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1537 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1538 | } |
1539 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1540 | B_TRUE, tx); | |
1541 | if (error != 0) { | |
1542 | dsl_dataset_rele(ds, FTAG); | |
1543 | return (error); | |
1544 | } | |
1545 | ||
1546 | dsl_dataset_rele(ds, FTAG); | |
1547 | return (0); | |
1548 | } | |
1549 | ||
1550 | static void | |
1551 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1552 | { | |
1553 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1554 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1555 | dsl_dataset_t *ds; | |
1556 | ||
1557 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1558 | ||
1559 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1560 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1561 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1562 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1563 | ||
1564 | dsl_dataset_rele(ds, FTAG); | |
1565 | } | |
1566 | ||
1567 | int | |
1568 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1569 | minor_t cleanup_minor, const char *htag) | |
1570 | { | |
1571 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1572 | int error; | |
1573 | spa_t *spa; | |
1574 | boolean_t needsuspend; | |
1575 | void *cookie; | |
1576 | ||
1577 | ddsta.ddsta_fsname = fsname; | |
1578 | ddsta.ddsta_snapname = snapname; | |
1579 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1580 | ddsta.ddsta_htag = htag; | |
1581 | ||
1582 | error = spa_open(fsname, &spa, FTAG); | |
1583 | if (error != 0) | |
1584 | return (error); | |
1585 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1586 | spa_close(spa, FTAG); | |
1587 | ||
1588 | if (needsuspend) { | |
1589 | error = zil_suspend(fsname, &cookie); | |
1590 | if (error != 0) | |
1591 | return (error); | |
1592 | } | |
1593 | ||
1594 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1595 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1596 | |
1597 | if (needsuspend) | |
1598 | zil_resume(cookie); | |
1599 | return (error); | |
1600 | } | |
1601 | ||
1602 | ||
1603 | void | |
1604 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1605 | { | |
241b5415 MA |
1606 | spa_feature_t f; |
1607 | ||
13fe0198 MA |
1608 | ASSERT(dmu_tx_is_syncing(tx)); |
1609 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1610 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1611 | |
1612 | /* | |
1613 | * in case we had to change ds_fsid_guid when we opened it, | |
1614 | * sync it out now. | |
1615 | */ | |
1616 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1617 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 MA |
1618 | |
1619 | dmu_objset_sync(ds->ds_objset, zio, tx); | |
f1512ee6 | 1620 | |
241b5415 MA |
1621 | for (f = 0; f < SPA_FEATURES; f++) { |
1622 | if (ds->ds_feature_activation_needed[f]) { | |
1623 | if (ds->ds_feature_inuse[f]) | |
1624 | continue; | |
1625 | dsl_dataset_activate_feature(ds->ds_object, f, tx); | |
1626 | ds->ds_feature_inuse[f] = B_TRUE; | |
1627 | } | |
f1512ee6 | 1628 | } |
13fe0198 MA |
1629 | } |
1630 | ||
1631 | static void | |
1632 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1633 | { | |
1634 | uint64_t count = 0; | |
1635 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1636 | zap_cursor_t zc; | |
1637 | zap_attribute_t za; | |
1638 | nvlist_t *propval = fnvlist_alloc(); | |
1639 | nvlist_t *val = fnvlist_alloc(); | |
1640 | ||
1641 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
1642 | |
1643 | /* | |
13fe0198 | 1644 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
1645 | * due to a bug in a previous version of the code. |
1646 | * Only trust it if it has the right number of entries. | |
1647 | */ | |
d683ddbb JG |
1648 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
1649 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
1650 | &count)); |
1651 | } | |
d683ddbb | 1652 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) |
330d06f9 | 1653 | goto fail; |
d683ddbb JG |
1654 | for (zap_cursor_init(&zc, mos, |
1655 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
1656 | zap_cursor_retrieve(&zc, &za) == 0; |
1657 | zap_cursor_advance(&zc)) { | |
1658 | dsl_dataset_t *clone; | |
1659 | char buf[ZFS_MAXNAMELEN]; | |
13fe0198 MA |
1660 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1661 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 1662 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 1663 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
1664 | dsl_dataset_rele(clone, FTAG); |
1665 | } | |
1666 | zap_cursor_fini(&zc); | |
13fe0198 MA |
1667 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); |
1668 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
330d06f9 MA |
1669 | fail: |
1670 | nvlist_free(val); | |
1671 | nvlist_free(propval); | |
330d06f9 MA |
1672 | } |
1673 | ||
34dc7c2f BB |
1674 | void |
1675 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1676 | { | |
f5fc4aca | 1677 | uint64_t refd, avail, uobjs, aobjs, ratio; |
13fe0198 MA |
1678 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
1679 | ||
1680 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 1681 | |
d683ddbb JG |
1682 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : |
1683 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1684 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
6f1ffb06 MA |
1685 | |
1686 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
24a64651 | 1687 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d683ddbb | 1688 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); |
6f1ffb06 | 1689 | |
0c66c32d | 1690 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
1691 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); |
1692 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
d683ddbb | 1693 | dsl_dataset_phys(ds)->ds_unique_bytes); |
6f1ffb06 MA |
1694 | get_clones_stat(ds, nv); |
1695 | } else { | |
1696 | dsl_dir_stats(ds->ds_dir, nv); | |
1697 | } | |
34dc7c2f BB |
1698 | |
1699 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1700 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1701 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1702 | ||
1703 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
d683ddbb | 1704 | dsl_dataset_phys(ds)->ds_creation_time); |
34dc7c2f | 1705 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d683ddbb | 1706 | dsl_dataset_phys(ds)->ds_creation_txg); |
34dc7c2f BB |
1707 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
1708 | ds->ds_quota); | |
1709 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1710 | ds->ds_reserved); | |
b128c09f | 1711 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d683ddbb | 1712 | dsl_dataset_phys(ds)->ds_guid); |
428870ff | 1713 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d683ddbb | 1714 | dsl_dataset_phys(ds)->ds_unique_bytes); |
428870ff BB |
1715 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
1716 | ds->ds_object); | |
1717 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1718 | ds->ds_userrefs); | |
45d1cae3 BB |
1719 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
1720 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
34dc7c2f | 1721 | |
d683ddbb | 1722 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
330d06f9 MA |
1723 | uint64_t written, comp, uncomp; |
1724 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1725 | dsl_dataset_t *prev; | |
1726 | int err; | |
1727 | ||
330d06f9 | 1728 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 1729 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); |
330d06f9 MA |
1730 | if (err == 0) { |
1731 | err = dsl_dataset_space_written(prev, ds, &written, | |
1732 | &comp, &uncomp); | |
1733 | dsl_dataset_rele(prev, FTAG); | |
1734 | if (err == 0) { | |
1735 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1736 | written); | |
1737 | } | |
1738 | } | |
1739 | } | |
1740 | ||
34dc7c2f BB |
1741 | } |
1742 | ||
1743 | void | |
1744 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1745 | { | |
13fe0198 MA |
1746 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1747 | ASSERT(dsl_pool_config_held(dp)); | |
1748 | ||
d683ddbb JG |
1749 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; |
1750 | stat->dds_inconsistent = | |
1751 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1752 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
6f1ffb06 | 1753 | stat->dds_origin[0] = '\0'; |
0c66c32d | 1754 | if (ds->ds_is_snapshot) { |
34dc7c2f | 1755 | stat->dds_is_snapshot = B_TRUE; |
d683ddbb JG |
1756 | stat->dds_num_clones = |
1757 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
fb5f0bc8 BB |
1758 | } else { |
1759 | stat->dds_is_snapshot = B_FALSE; | |
1760 | stat->dds_num_clones = 0; | |
34dc7c2f | 1761 | |
6f1ffb06 MA |
1762 | if (dsl_dir_is_clone(ds->ds_dir)) { |
1763 | dsl_dataset_t *ods; | |
34dc7c2f | 1764 | |
13fe0198 | 1765 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1766 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, |
1767 | FTAG, &ods)); | |
6f1ffb06 | 1768 | dsl_dataset_name(ods, stat->dds_origin); |
13fe0198 | 1769 | dsl_dataset_rele(ods, FTAG); |
6f1ffb06 | 1770 | } |
34dc7c2f | 1771 | } |
34dc7c2f BB |
1772 | } |
1773 | ||
1774 | uint64_t | |
1775 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1776 | { | |
1777 | return (ds->ds_fsid_guid); | |
1778 | } | |
1779 | ||
1780 | void | |
1781 | dsl_dataset_space(dsl_dataset_t *ds, | |
1782 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
1783 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
1784 | { | |
d683ddbb | 1785 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 1786 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
1787 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
1788 | *availbytesp += | |
1789 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
1790 | if (ds->ds_quota != 0) { |
1791 | /* | |
1792 | * Adjust available bytes according to refquota | |
1793 | */ | |
1794 | if (*refdbytesp < ds->ds_quota) | |
1795 | *availbytesp = MIN(*availbytesp, | |
1796 | ds->ds_quota - *refdbytesp); | |
1797 | else | |
1798 | *availbytesp = 0; | |
1799 | } | |
d683ddbb | 1800 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
34dc7c2f BB |
1801 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
1802 | } | |
1803 | ||
1804 | boolean_t | |
19580676 | 1805 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 1806 | { |
19580676 MA |
1807 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
1808 | if (snap == NULL) | |
34dc7c2f | 1809 | return (B_FALSE); |
d683ddbb JG |
1810 | if (dsl_dataset_phys(ds)->ds_bp.blk_birth > |
1811 | dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 1812 | objset_t *os, *os_snap; |
572e2857 BB |
1813 | /* |
1814 | * It may be that only the ZIL differs, because it was | |
1815 | * reset in the head. Don't count that as being | |
1816 | * modified. | |
1817 | */ | |
1818 | if (dmu_objset_from_ds(ds, &os) != 0) | |
1819 | return (B_TRUE); | |
19580676 | 1820 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
1821 | return (B_TRUE); |
1822 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 1823 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
1824 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
1825 | } | |
34dc7c2f BB |
1826 | return (B_FALSE); |
1827 | } | |
1828 | ||
13fe0198 MA |
1829 | typedef struct dsl_dataset_rename_snapshot_arg { |
1830 | const char *ddrsa_fsname; | |
1831 | const char *ddrsa_oldsnapname; | |
1832 | const char *ddrsa_newsnapname; | |
1833 | boolean_t ddrsa_recursive; | |
1834 | dmu_tx_t *ddrsa_tx; | |
1835 | } dsl_dataset_rename_snapshot_arg_t; | |
1836 | ||
34dc7c2f BB |
1837 | /* ARGSUSED */ |
1838 | static int | |
13fe0198 MA |
1839 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
1840 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 1841 | { |
13fe0198 MA |
1842 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1843 | int error; | |
34dc7c2f | 1844 | uint64_t val; |
34dc7c2f | 1845 | |
13fe0198 MA |
1846 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
1847 | if (error != 0) { | |
1848 | /* ignore nonexistent snapshots */ | |
1849 | return (error == ENOENT ? 0 : error); | |
1850 | } | |
34dc7c2f | 1851 | |
13fe0198 MA |
1852 | /* new name should not exist */ |
1853 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
1854 | if (error == 0) | |
2e528b49 | 1855 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
1856 | else if (error == ENOENT) |
1857 | error = 0; | |
34dc7c2f BB |
1858 | |
1859 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 MA |
1860 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
1861 | strlen(ddrsa->ddrsa_newsnapname) >= MAXNAMELEN) | |
2e528b49 | 1862 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 1863 | |
13fe0198 | 1864 | return (error); |
34dc7c2f BB |
1865 | } |
1866 | ||
13fe0198 MA |
1867 | static int |
1868 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1869 | { |
13fe0198 MA |
1870 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1871 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 1872 | dsl_dataset_t *hds; |
13fe0198 | 1873 | int error; |
34dc7c2f | 1874 | |
13fe0198 MA |
1875 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
1876 | if (error != 0) | |
1877 | return (error); | |
34dc7c2f | 1878 | |
13fe0198 MA |
1879 | if (ddrsa->ddrsa_recursive) { |
1880 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
1881 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
1882 | DS_FIND_CHILDREN); | |
1883 | } else { | |
1884 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
1885 | } | |
b128c09f | 1886 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 1887 | return (error); |
34dc7c2f BB |
1888 | } |
1889 | ||
34dc7c2f | 1890 | static int |
13fe0198 MA |
1891 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
1892 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 1893 | { |
13fe0198 MA |
1894 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1895 | dsl_dataset_t *ds; | |
1896 | uint64_t val; | |
1897 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
1898 | int error; | |
34dc7c2f | 1899 | |
13fe0198 MA |
1900 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
1901 | ASSERT(error == 0 || error == ENOENT); | |
1902 | if (error == ENOENT) { | |
1903 | /* ignore nonexistent snapshots */ | |
1904 | return (0); | |
34dc7c2f BB |
1905 | } |
1906 | ||
13fe0198 MA |
1907 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
1908 | ||
1909 | /* log before we change the name */ | |
1910 | spa_history_log_internal_ds(ds, "rename", tx, | |
1911 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 1912 | |
788eb90c JJ |
1913 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
1914 | B_FALSE)); | |
13fe0198 MA |
1915 | mutex_enter(&ds->ds_lock); |
1916 | (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); | |
1917 | mutex_exit(&ds->ds_lock); | |
d683ddbb JG |
1918 | VERIFY0(zap_add(dp->dp_meta_objset, |
1919 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 1920 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
34dc7c2f | 1921 | |
13fe0198 | 1922 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
1923 | return (0); |
1924 | } | |
1925 | ||
13fe0198 MA |
1926 | static void |
1927 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1928 | { |
13fe0198 MA |
1929 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1930 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1931 | dsl_dataset_t *hds; | |
34dc7c2f | 1932 | |
13fe0198 MA |
1933 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
1934 | ddrsa->ddrsa_tx = tx; | |
1935 | if (ddrsa->ddrsa_recursive) { | |
1936 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
1937 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
1938 | DS_FIND_CHILDREN)); | |
1939 | } else { | |
1940 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 1941 | } |
13fe0198 | 1942 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
1943 | } |
1944 | ||
13fe0198 MA |
1945 | int |
1946 | dsl_dataset_rename_snapshot(const char *fsname, | |
1947 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 1948 | { |
2078f210 SS |
1949 | #ifdef _KERNEL |
1950 | char *oldname, *newname; | |
1951 | #endif | |
1952 | int error; | |
1953 | ||
13fe0198 | 1954 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 1955 | |
13fe0198 MA |
1956 | ddrsa.ddrsa_fsname = fsname; |
1957 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
1958 | ddrsa.ddrsa_newsnapname = newsnapname; | |
1959 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 1960 | |
2078f210 | 1961 | error = dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 MA |
1962 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
1963 | 1, ZFS_SPACE_CHECK_RESERVED); | |
2078f210 SS |
1964 | |
1965 | if (error) | |
1966 | return (SET_ERROR(error)); | |
1967 | ||
1968 | #ifdef _KERNEL | |
1969 | oldname = kmem_asprintf("%s@%s", fsname, oldsnapname); | |
1970 | newname = kmem_asprintf("%s@%s", fsname, newsnapname); | |
1971 | zvol_rename_minors(oldname, newname); | |
1972 | strfree(newname); | |
1973 | strfree(oldname); | |
1974 | #endif | |
1975 | ||
1976 | return (0); | |
34dc7c2f BB |
1977 | } |
1978 | ||
831baf06 KW |
1979 | /* |
1980 | * If we're doing an ownership handoff, we need to make sure that there is | |
1981 | * only one long hold on the dataset. We're not allowed to change anything here | |
1982 | * so we don't permanently release the long hold or regular hold here. We want | |
1983 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
1984 | * when we release the long hold. | |
1985 | */ | |
1986 | static int | |
1987 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
1988 | { | |
1989 | boolean_t held; | |
1990 | ||
1991 | if (!dmu_tx_is_syncing(tx)) | |
1992 | return (0); | |
1993 | ||
1994 | if (owner != NULL) { | |
1995 | VERIFY3P(ds->ds_owner, ==, owner); | |
1996 | dsl_dataset_long_rele(ds, owner); | |
1997 | } | |
1998 | ||
1999 | held = dsl_dataset_long_held(ds); | |
2000 | ||
2001 | if (owner != NULL) | |
2002 | dsl_dataset_long_hold(ds, owner); | |
2003 | ||
2004 | if (held) | |
2005 | return (SET_ERROR(EBUSY)); | |
2006 | ||
2007 | return (0); | |
2008 | } | |
2009 | ||
2010 | typedef struct dsl_dataset_rollback_arg { | |
2011 | const char *ddra_fsname; | |
2012 | void *ddra_owner; | |
46ba1e59 | 2013 | nvlist_t *ddra_result; |
831baf06 KW |
2014 | } dsl_dataset_rollback_arg_t; |
2015 | ||
13fe0198 MA |
2016 | static int |
2017 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2018 | { |
831baf06 | 2019 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 2020 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 2021 | dsl_dataset_t *ds; |
13fe0198 MA |
2022 | int64_t unused_refres_delta; |
2023 | int error; | |
da536844 MA |
2024 | nvpair_t *pair; |
2025 | nvlist_t *proprequest, *bookmarks; | |
34dc7c2f | 2026 | |
831baf06 | 2027 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
2028 | if (error != 0) |
2029 | return (error); | |
428870ff | 2030 | |
13fe0198 | 2031 | /* must not be a snapshot */ |
0c66c32d | 2032 | if (ds->ds_is_snapshot) { |
13fe0198 | 2033 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2034 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2035 | } |
34dc7c2f | 2036 | |
13fe0198 | 2037 | /* must have a most recent snapshot */ |
d683ddbb | 2038 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 2039 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2040 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2041 | } |
34dc7c2f | 2042 | |
da536844 | 2043 | /* must not have any bookmarks after the most recent snapshot */ |
79c76d5b | 2044 | proprequest = fnvlist_alloc(); |
da536844 | 2045 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
79c76d5b | 2046 | bookmarks = fnvlist_alloc(); |
da536844 MA |
2047 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
2048 | fnvlist_free(proprequest); | |
2049 | if (error != 0) | |
2050 | return (error); | |
2051 | for (pair = nvlist_next_nvpair(bookmarks, NULL); | |
2052 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { | |
2053 | nvlist_t *valuenv = | |
2054 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2055 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2056 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2057 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2058 | fnvlist_free(bookmarks); |
2059 | dsl_dataset_rele(ds, FTAG); | |
2060 | return (SET_ERROR(EEXIST)); | |
2061 | } | |
2062 | } | |
2063 | fnvlist_free(bookmarks); | |
2064 | ||
831baf06 KW |
2065 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2066 | if (error != 0) { | |
13fe0198 | 2067 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2068 | return (error); |
34dc7c2f | 2069 | } |
428870ff | 2070 | |
13fe0198 MA |
2071 | /* |
2072 | * Check if the snap we are rolling back to uses more than | |
2073 | * the refquota. | |
2074 | */ | |
2075 | if (ds->ds_quota != 0 && | |
d683ddbb | 2076 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2077 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2078 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2079 | } |
2080 | ||
13fe0198 MA |
2081 | /* |
2082 | * When we do the clone swap, we will temporarily use more space | |
2083 | * due to the refreservation (the head will no longer have any | |
2084 | * unique space, so the entire amount of the refreservation will need | |
2085 | * to be free). We will immediately destroy the clone, freeing | |
2086 | * this space, but the freeing happens over many txg's. | |
2087 | */ | |
2088 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2089 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2090 | |
13fe0198 MA |
2091 | if (unused_refres_delta > 0 && |
2092 | unused_refres_delta > | |
2093 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2094 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2095 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2096 | } |
34dc7c2f | 2097 | |
13fe0198 MA |
2098 | dsl_dataset_rele(ds, FTAG); |
2099 | return (0); | |
2100 | } | |
34dc7c2f | 2101 | |
13fe0198 MA |
2102 | static void |
2103 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2104 | { | |
831baf06 | 2105 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2106 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2107 | dsl_dataset_t *ds, *clone; | |
2108 | uint64_t cloneobj; | |
46ba1e59 | 2109 | char namebuf[ZFS_MAXNAMELEN]; |
34dc7c2f | 2110 | |
831baf06 | 2111 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2112 | |
46ba1e59 MA |
2113 | dsl_dataset_name(ds->ds_prev, namebuf); |
2114 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2115 | ||
13fe0198 MA |
2116 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
2117 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); | |
2118 | ||
2119 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2120 | ||
2121 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2122 | dsl_dataset_zero_zil(ds, tx); | |
2123 | ||
2124 | dsl_destroy_head_sync_impl(clone, tx); | |
2125 | ||
2126 | dsl_dataset_rele(clone, FTAG); | |
2127 | dsl_dataset_rele(ds, FTAG); | |
2128 | } | |
2129 | ||
831baf06 | 2130 | /* |
46ba1e59 MA |
2131 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2132 | * The name of the most recent snapshot will be returned under key "target" | |
2133 | * in the result nvlist. | |
831baf06 | 2134 | * |
46ba1e59 | 2135 | * If owner != NULL: |
831baf06 KW |
2136 | * - The existing dataset MUST be owned by the specified owner at entry |
2137 | * - Upon return, dataset will still be held by the same owner, whether we | |
2138 | * succeed or not. | |
2139 | * | |
2140 | * This mode is required any time the existing filesystem is mounted. See | |
2141 | * notes above zfs_suspend_fs() for further details. | |
2142 | */ | |
13fe0198 | 2143 | int |
46ba1e59 | 2144 | dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) |
13fe0198 | 2145 | { |
831baf06 KW |
2146 | dsl_dataset_rollback_arg_t ddra; |
2147 | ||
2148 | ddra.ddra_fsname = fsname; | |
2149 | ddra.ddra_owner = owner; | |
46ba1e59 | 2150 | ddra.ddra_result = result; |
831baf06 | 2151 | |
13fe0198 | 2152 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
2153 | dsl_dataset_rollback_sync, &ddra, |
2154 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2155 | } |
2156 | ||
b128c09f BB |
2157 | struct promotenode { |
2158 | list_node_t link; | |
2159 | dsl_dataset_t *ds; | |
2160 | }; | |
2161 | ||
13fe0198 MA |
2162 | typedef struct dsl_dataset_promote_arg { |
2163 | const char *ddpa_clonename; | |
2164 | dsl_dataset_t *ddpa_clone; | |
b128c09f | 2165 | list_t shared_snaps, origin_snaps, clone_snaps; |
13fe0198 | 2166 | dsl_dataset_t *origin_origin; /* origin of the origin */ |
b128c09f | 2167 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; |
428870ff | 2168 | char *err_ds; |
788eb90c | 2169 | cred_t *cr; |
13fe0198 | 2170 | } dsl_dataset_promote_arg_t; |
34dc7c2f | 2171 | |
b128c09f | 2172 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
2173 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
2174 | void *tag); | |
2175 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 2176 | |
34dc7c2f | 2177 | static int |
13fe0198 | 2178 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2179 | { |
13fe0198 MA |
2180 | dsl_dataset_promote_arg_t *ddpa = arg; |
2181 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2182 | dsl_dataset_t *hds; | |
2183 | struct promotenode *snap; | |
2184 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 2185 | int err; |
428870ff | 2186 | uint64_t unused; |
788eb90c | 2187 | uint64_t ss_mv_cnt; |
fec41709 | 2188 | size_t max_snap_len; |
34dc7c2f | 2189 | |
13fe0198 MA |
2190 | err = promote_hold(ddpa, dp, FTAG); |
2191 | if (err != 0) | |
2192 | return (err); | |
34dc7c2f | 2193 | |
13fe0198 | 2194 | hds = ddpa->ddpa_clone; |
fec41709 | 2195 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 2196 | |
d683ddbb | 2197 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 2198 | promote_rele(ddpa, FTAG); |
2e528b49 | 2199 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
2200 | } |
2201 | ||
2202 | /* | |
2203 | * Compute and check the amount of space to transfer. Since this is | |
2204 | * so expensive, don't do the preliminary check. | |
2205 | */ | |
2206 | if (!dmu_tx_is_syncing(tx)) { | |
2207 | promote_rele(ddpa, FTAG); | |
2208 | return (0); | |
2209 | } | |
2210 | ||
2211 | snap = list_head(&ddpa->shared_snaps); | |
2212 | origin_ds = snap->ds; | |
34dc7c2f BB |
2213 | |
2214 | /* compute origin's new unique space */ | |
13fe0198 | 2215 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2216 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2217 | origin_ds->ds_object); | |
428870ff | 2218 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 2219 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 2220 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 2221 | |
b128c09f BB |
2222 | /* |
2223 | * Walk the snapshots that we are moving | |
2224 | * | |
2225 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 2226 | * to used by each snapshot: |
b128c09f BB |
2227 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
2228 | * So each snapshot gave birth to: | |
2229 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2230 | * So a sequence would look like: | |
2231 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2232 | * Which simplifies to: | |
2233 | * uN + kN + kN-1 + ... + k1 + k0 | |
2234 | * Note however, if we stop before we reach the ORIGIN we get: | |
2235 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2236 | */ | |
788eb90c | 2237 | ss_mv_cnt = 0; |
d683ddbb JG |
2238 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
2239 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2240 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
2241 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2242 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 2243 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 2244 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 2245 | |
788eb90c JJ |
2246 | ss_mv_cnt++; |
2247 | ||
13fe0198 MA |
2248 | /* |
2249 | * If there are long holds, we won't be able to evict | |
2250 | * the objset. | |
2251 | */ | |
2252 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 2253 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
2254 | goto out; |
2255 | } | |
2256 | ||
34dc7c2f | 2257 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 2258 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
2259 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
2260 | err = SET_ERROR(ENAMETOOLONG); | |
2261 | goto out; | |
2262 | } | |
b128c09f | 2263 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 2264 | if (err == 0) { |
13fe0198 | 2265 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); |
2e528b49 | 2266 | err = SET_ERROR(EEXIST); |
428870ff BB |
2267 | goto out; |
2268 | } | |
b128c09f | 2269 | if (err != ENOENT) |
428870ff | 2270 | goto out; |
34dc7c2f | 2271 | |
b128c09f | 2272 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 2273 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 2274 | continue; |
34dc7c2f | 2275 | |
428870ff BB |
2276 | dsl_deadlist_space(&ds->ds_deadlist, |
2277 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
2278 | ddpa->used += dlused; |
2279 | ddpa->comp += dlcomp; | |
2280 | ddpa->uncomp += dluncomp; | |
b128c09f | 2281 | } |
34dc7c2f | 2282 | |
b128c09f BB |
2283 | /* |
2284 | * If we are a clone of a clone then we never reached ORIGIN, | |
2285 | * so we need to subtract out the clone origin's used space. | |
2286 | */ | |
13fe0198 | 2287 | if (ddpa->origin_origin) { |
d683ddbb JG |
2288 | ddpa->used -= |
2289 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2290 | ddpa->comp -= | |
2291 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 2292 | ddpa->uncomp -= |
d683ddbb JG |
2293 | dsl_dataset_phys(ddpa->origin_origin)-> |
2294 | ds_uncompressed_bytes; | |
34dc7c2f BB |
2295 | } |
2296 | ||
788eb90c | 2297 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 2298 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 2299 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
2300 | if (err != 0) |
2301 | goto out; | |
34dc7c2f | 2302 | |
b128c09f BB |
2303 | /* |
2304 | * Compute the amounts of space that will be used by snapshots | |
2305 | * after the promotion (for both origin and clone). For each, | |
2306 | * it is the amount of space that will be on all of their | |
2307 | * deadlists (that was not born before their new origin). | |
2308 | */ | |
d683ddbb | 2309 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
2310 | uint64_t space; |
2311 | ||
2312 | /* | |
2313 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
2314 | * so dd_origin_txg will be < TXG_INITIAL, so |
2315 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
2316 | * calls will be fast because they do not have to |
2317 | * iterate over all bps. | |
2318 | */ | |
13fe0198 MA |
2319 | snap = list_head(&ddpa->origin_snaps); |
2320 | err = snaplist_space(&ddpa->shared_snaps, | |
2321 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2322 | if (err != 0) | |
2323 | goto out; | |
b128c09f | 2324 | |
13fe0198 | 2325 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 2326 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
2327 | if (err != 0) |
2328 | goto out; | |
2329 | ddpa->cloneusedsnap += space; | |
b128c09f | 2330 | } |
d683ddbb JG |
2331 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
2332 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 2333 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
2334 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
2335 | &ddpa->originusedsnap); | |
13fe0198 MA |
2336 | if (err != 0) |
2337 | goto out; | |
b128c09f BB |
2338 | } |
2339 | ||
428870ff | 2340 | out: |
13fe0198 | 2341 | promote_rele(ddpa, FTAG); |
428870ff | 2342 | return (err); |
34dc7c2f BB |
2343 | } |
2344 | ||
2345 | static void | |
13fe0198 | 2346 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2347 | { |
13fe0198 MA |
2348 | dsl_dataset_promote_arg_t *ddpa = arg; |
2349 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2350 | dsl_dataset_t *hds; | |
2351 | struct promotenode *snap; | |
2352 | dsl_dataset_t *origin_ds; | |
b128c09f | 2353 | dsl_dataset_t *origin_head; |
13fe0198 | 2354 | dsl_dir_t *dd; |
34dc7c2f | 2355 | dsl_dir_t *odd = NULL; |
b128c09f BB |
2356 | uint64_t oldnext_obj; |
2357 | int64_t delta; | |
34dc7c2f | 2358 | |
13fe0198 MA |
2359 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
2360 | hds = ddpa->ddpa_clone; | |
2361 | ||
d683ddbb | 2362 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
2363 | |
2364 | snap = list_head(&ddpa->shared_snaps); | |
2365 | origin_ds = snap->ds; | |
2366 | dd = hds->ds_dir; | |
34dc7c2f | 2367 | |
13fe0198 | 2368 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
2369 | origin_head = snap->ds; |
2370 | ||
34dc7c2f BB |
2371 | /* |
2372 | * We need to explicitly open odd, since origin_ds's dd will be | |
2373 | * changing. | |
2374 | */ | |
13fe0198 | 2375 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
2376 | NULL, FTAG, &odd)); |
2377 | ||
b128c09f BB |
2378 | /* change origin's next snap */ |
2379 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 2380 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 2381 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2382 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2383 | origin_ds->ds_object); | |
2384 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
2385 | |
2386 | /* change the origin's next clone */ | |
d683ddbb | 2387 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
2388 | dsl_dataset_remove_from_next_clones(origin_ds, |
2389 | snap->ds->ds_object, tx); | |
2390 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 2391 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
2392 | oldnext_obj, tx)); |
2393 | } | |
2394 | ||
2395 | /* change origin */ | |
2396 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
2397 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
2398 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 2399 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 2400 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 2401 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 2402 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 2403 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
2404 | |
2405 | /* change dd_clone entries */ | |
2406 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 2407 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2408 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 2409 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2410 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
2411 | hds->ds_object, tx)); |
2412 | ||
13fe0198 | 2413 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2414 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 2415 | origin_head->ds_object, tx)); |
d683ddbb JG |
2416 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
2417 | dsl_dir_phys(dd)->dd_clones = | |
2418 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2419 | DMU_OT_NONE, 0, tx); | |
428870ff | 2420 | } |
13fe0198 | 2421 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2422 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 2423 | } |
34dc7c2f | 2424 | |
b128c09f | 2425 | /* move snapshots to this dir */ |
13fe0198 MA |
2426 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2427 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
2428 | dsl_dataset_t *ds = snap->ds; |
2429 | ||
13fe0198 MA |
2430 | /* |
2431 | * Property callbacks are registered to a particular | |
2432 | * dsl_dir. Since ours is changing, evict the objset | |
2433 | * so that they will be unregistered from the old dsl_dir. | |
2434 | */ | |
428870ff BB |
2435 | if (ds->ds_objset) { |
2436 | dmu_objset_evict(ds->ds_objset); | |
2437 | ds->ds_objset = NULL; | |
b128c09f | 2438 | } |
13fe0198 | 2439 | |
34dc7c2f | 2440 | /* move snap name entry */ |
13fe0198 MA |
2441 | VERIFY0(dsl_dataset_get_snapname(ds)); |
2442 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 2443 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 2444 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 2445 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 2446 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
2447 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
2448 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 2449 | |
34dc7c2f BB |
2450 | /* change containing dsl_dir */ |
2451 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
2452 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
2453 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 2454 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
2455 | dsl_dir_rele(ds->ds_dir, ds); |
2456 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
2457 | NULL, ds, &ds->ds_dir)); |
2458 | ||
428870ff | 2459 | /* move any clone references */ |
d683ddbb | 2460 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
2461 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
2462 | zap_cursor_t zc; | |
2463 | zap_attribute_t za; | |
2464 | ||
2465 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 2466 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 2467 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
2468 | zap_cursor_advance(&zc)) { |
2469 | dsl_dataset_t *cnds; | |
2470 | uint64_t o; | |
34dc7c2f | 2471 | |
13fe0198 MA |
2472 | if (za.za_first_integer == oldnext_obj) { |
2473 | /* | |
2474 | * We've already moved the | |
2475 | * origin's reference. | |
2476 | */ | |
2477 | continue; | |
2478 | } | |
34dc7c2f | 2479 | |
13fe0198 MA |
2480 | VERIFY0(dsl_dataset_hold_obj(dp, |
2481 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
2482 | o = dsl_dir_phys(cnds->ds_dir)-> |
2483 | dd_head_dataset_obj; | |
34dc7c2f | 2484 | |
13fe0198 | 2485 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2486 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 2487 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2488 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
2489 | dsl_dataset_rele(cnds, FTAG); |
2490 | } | |
2491 | zap_cursor_fini(&zc); | |
2492 | } | |
34dc7c2f | 2493 | |
13fe0198 | 2494 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
2495 | } |
2496 | ||
34dc7c2f | 2497 | /* |
13fe0198 MA |
2498 | * Change space accounting. |
2499 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2500 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2501 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 2502 | */ |
570827e1 | 2503 | |
13fe0198 | 2504 | delta = ddpa->cloneusedsnap - |
d683ddbb | 2505 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2506 | ASSERT3S(delta, >=, 0); |
2507 | ASSERT3U(ddpa->used, >=, delta); | |
2508 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2509 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2510 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 2511 | |
13fe0198 | 2512 | delta = ddpa->originusedsnap - |
d683ddbb | 2513 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2514 | ASSERT3S(delta, <=, 0); |
2515 | ASSERT3U(ddpa->used, >=, -delta); | |
2516 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2517 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2518 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2519 | ||
d683ddbb | 2520 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
2521 | |
2522 | /* log history record */ | |
2523 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2524 | ||
2525 | dsl_dir_rele(odd, FTAG); | |
2526 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
2527 | } |
2528 | ||
13fe0198 MA |
2529 | /* |
2530 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2531 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2532 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2533 | * snapshots back to this dataset's origin. | |
2534 | */ | |
34dc7c2f | 2535 | static int |
13fe0198 MA |
2536 | snaplist_make(dsl_pool_t *dp, |
2537 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 2538 | { |
13fe0198 | 2539 | uint64_t obj = last_obj; |
34dc7c2f | 2540 | |
13fe0198 MA |
2541 | list_create(l, sizeof (struct promotenode), |
2542 | offsetof(struct promotenode, link)); | |
34dc7c2f | 2543 | |
13fe0198 MA |
2544 | while (obj != first_obj) { |
2545 | dsl_dataset_t *ds; | |
2546 | struct promotenode *snap; | |
2547 | int err; | |
428870ff | 2548 | |
13fe0198 MA |
2549 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
2550 | ASSERT(err != ENOENT); | |
2551 | if (err != 0) | |
2552 | return (err); | |
34dc7c2f | 2553 | |
13fe0198 | 2554 | if (first_obj == 0) |
d683ddbb | 2555 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 2556 | |
79c76d5b | 2557 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
2558 | snap->ds = ds; |
2559 | list_insert_tail(l, snap); | |
d683ddbb | 2560 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 2561 | } |
34dc7c2f BB |
2562 | |
2563 | return (0); | |
2564 | } | |
2565 | ||
13fe0198 MA |
2566 | static int |
2567 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 2568 | { |
13fe0198 | 2569 | struct promotenode *snap; |
6f1ffb06 | 2570 | |
13fe0198 MA |
2571 | *spacep = 0; |
2572 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2573 | uint64_t used, comp, uncomp; | |
2574 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2575 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2576 | *spacep += used; | |
428870ff | 2577 | } |
13fe0198 | 2578 | return (0); |
34dc7c2f BB |
2579 | } |
2580 | ||
13fe0198 MA |
2581 | static void |
2582 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 2583 | { |
13fe0198 | 2584 | struct promotenode *snap; |
428870ff | 2585 | |
13fe0198 MA |
2586 | if (l == NULL || !list_link_active(&l->list_head)) |
2587 | return; | |
34dc7c2f | 2588 | |
13fe0198 MA |
2589 | while ((snap = list_tail(l)) != NULL) { |
2590 | list_remove(l, snap); | |
2591 | dsl_dataset_rele(snap->ds, tag); | |
2592 | kmem_free(snap, sizeof (*snap)); | |
2593 | } | |
2594 | list_destroy(l); | |
34dc7c2f BB |
2595 | } |
2596 | ||
2597 | static int | |
13fe0198 | 2598 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 2599 | { |
13fe0198 MA |
2600 | int error; |
2601 | dsl_dir_t *dd; | |
2602 | struct promotenode *snap; | |
34dc7c2f | 2603 | |
13fe0198 MA |
2604 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
2605 | &ddpa->ddpa_clone); | |
2606 | if (error != 0) | |
2607 | return (error); | |
2608 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 2609 | |
0c66c32d | 2610 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
2611 | !dsl_dir_is_clone(dd)) { |
2612 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 2613 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2614 | } |
34dc7c2f | 2615 | |
d683ddbb | 2616 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
2617 | &ddpa->shared_snaps, tag); |
2618 | if (error != 0) | |
2619 | goto out; | |
34dc7c2f | 2620 | |
13fe0198 MA |
2621 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
2622 | &ddpa->clone_snaps, tag); | |
2623 | if (error != 0) | |
2624 | goto out; | |
34dc7c2f | 2625 | |
13fe0198 | 2626 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
2627 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
2628 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2629 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
2630 | &ddpa->origin_snaps, tag); |
2631 | if (error != 0) | |
2632 | goto out; | |
d164b209 | 2633 | |
d683ddbb | 2634 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 2635 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 2636 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
2637 | tag, &ddpa->origin_origin); |
2638 | if (error != 0) | |
2639 | goto out; | |
d164b209 | 2640 | } |
13fe0198 MA |
2641 | out: |
2642 | if (error != 0) | |
2643 | promote_rele(ddpa, tag); | |
2644 | return (error); | |
34dc7c2f BB |
2645 | } |
2646 | ||
34dc7c2f | 2647 | static void |
13fe0198 | 2648 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 2649 | { |
13fe0198 MA |
2650 | snaplist_destroy(&ddpa->shared_snaps, tag); |
2651 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2652 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2653 | if (ddpa->origin_origin != NULL) | |
2654 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2655 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2656 | } | |
428870ff | 2657 | |
13fe0198 MA |
2658 | /* |
2659 | * Promote a clone. | |
2660 | * | |
2661 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
2662 | * in with the name. (It must be at least MAXNAMELEN bytes long.) | |
2663 | */ | |
2664 | int | |
2665 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2666 | { | |
2667 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2668 | uint64_t numsnaps; | |
2669 | int error; | |
2670 | objset_t *os; | |
34dc7c2f | 2671 | |
13fe0198 MA |
2672 | /* |
2673 | * We will modify space proportional to the number of | |
2674 | * snapshots. Compute numsnaps. | |
2675 | */ | |
2676 | error = dmu_objset_hold(name, FTAG, &os); | |
2677 | if (error != 0) | |
2678 | return (error); | |
2679 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
2680 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
2681 | &numsnaps); | |
13fe0198 MA |
2682 | dmu_objset_rele(os, FTAG); |
2683 | if (error != 0) | |
2684 | return (error); | |
34dc7c2f | 2685 | |
13fe0198 MA |
2686 | ddpa.ddpa_clonename = name; |
2687 | ddpa.err_ds = conflsnap; | |
788eb90c | 2688 | ddpa.cr = CRED(); |
6f1ffb06 | 2689 | |
13fe0198 | 2690 | return (dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 MA |
2691 | dsl_dataset_promote_sync, &ddpa, |
2692 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2693 | } |
2694 | ||
2695 | int | |
13fe0198 | 2696 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 2697 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 2698 | { |
13fe0198 | 2699 | int64_t unused_refres_delta; |
34dc7c2f | 2700 | |
13fe0198 | 2701 | /* they should both be heads */ |
0c66c32d JG |
2702 | if (clone->ds_is_snapshot || |
2703 | origin_head->ds_is_snapshot) | |
2e528b49 | 2704 | return (SET_ERROR(EINVAL)); |
428870ff | 2705 | |
19580676 MA |
2706 | /* if we are not forcing, the branch point should be just before them */ |
2707 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 2708 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2709 | |
13fe0198 MA |
2710 | /* clone should be the clone (unless they are unrelated) */ |
2711 | if (clone->ds_prev != NULL && | |
2712 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 2713 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 2714 | return (SET_ERROR(EINVAL)); |
428870ff | 2715 | |
13fe0198 MA |
2716 | /* the clone should be a child of the origin */ |
2717 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 2718 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 2719 | |
13fe0198 | 2720 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
2721 | if (!force && |
2722 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 2723 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 2724 | |
13fe0198 | 2725 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 2726 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 2727 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
2728 | |
2729 | /* check amount of any unconsumed refreservation */ | |
2730 | unused_refres_delta = | |
2731 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2732 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2733 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2734 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2735 | |
2736 | if (unused_refres_delta > 0 && | |
2737 | unused_refres_delta > | |
2738 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 2739 | return (SET_ERROR(ENOSPC)); |
13fe0198 MA |
2740 | |
2741 | /* clone can't be over the head's refquota */ | |
2742 | if (origin_head->ds_quota != 0 && | |
d683ddbb JG |
2743 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
2744 | origin_head->ds_quota) | |
2e528b49 | 2745 | return (SET_ERROR(EDQUOT)); |
572e2857 | 2746 | |
13fe0198 | 2747 | return (0); |
572e2857 BB |
2748 | } |
2749 | ||
2750 | void | |
13fe0198 MA |
2751 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
2752 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 2753 | { |
241b5415 | 2754 | spa_feature_t f; |
13fe0198 MA |
2755 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2756 | int64_t unused_refres_delta; | |
428870ff | 2757 | |
13fe0198 MA |
2758 | ASSERT(clone->ds_reserved == 0); |
2759 | ASSERT(origin_head->ds_quota == 0 || | |
d683ddbb | 2760 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota); |
19580676 | 2761 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 2762 | |
241b5415 MA |
2763 | /* |
2764 | * Swap per-dataset feature flags. | |
2765 | */ | |
2766 | for (f = 0; f < SPA_FEATURES; f++) { | |
2767 | boolean_t clone_inuse; | |
2768 | boolean_t origin_head_inuse; | |
2769 | ||
2770 | if (!(spa_feature_table[f].fi_flags & | |
2771 | ZFEATURE_FLAG_PER_DATASET)) { | |
2772 | ASSERT(!clone->ds_feature_inuse[f]); | |
2773 | ASSERT(!origin_head->ds_feature_inuse[f]); | |
2774 | continue; | |
2775 | } | |
2776 | ||
2777 | clone_inuse = clone->ds_feature_inuse[f]; | |
2778 | origin_head_inuse = origin_head->ds_feature_inuse[f]; | |
2779 | ||
2780 | if (clone_inuse) { | |
2781 | dsl_dataset_deactivate_feature(clone->ds_object, f, tx); | |
2782 | clone->ds_feature_inuse[f] = B_FALSE; | |
2783 | } | |
2784 | if (origin_head_inuse) { | |
2785 | dsl_dataset_deactivate_feature(origin_head->ds_object, | |
2786 | f, tx); | |
2787 | origin_head->ds_feature_inuse[f] = B_FALSE; | |
2788 | } | |
2789 | if (clone_inuse) { | |
2790 | dsl_dataset_activate_feature(origin_head->ds_object, | |
2791 | f, tx); | |
2792 | origin_head->ds_feature_inuse[f] = B_TRUE; | |
2793 | } | |
2794 | if (origin_head_inuse) { | |
2795 | dsl_dataset_activate_feature(clone->ds_object, f, tx); | |
2796 | clone->ds_feature_inuse[f] = B_TRUE; | |
2797 | } | |
2798 | } | |
2799 | ||
13fe0198 MA |
2800 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
2801 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 2802 | |
13fe0198 MA |
2803 | if (clone->ds_objset != NULL) { |
2804 | dmu_objset_evict(clone->ds_objset); | |
2805 | clone->ds_objset = NULL; | |
2806 | } | |
45d1cae3 | 2807 | |
13fe0198 MA |
2808 | if (origin_head->ds_objset != NULL) { |
2809 | dmu_objset_evict(origin_head->ds_objset); | |
2810 | origin_head->ds_objset = NULL; | |
45d1cae3 | 2811 | } |
45d1cae3 | 2812 | |
13fe0198 MA |
2813 | unused_refres_delta = |
2814 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2815 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2816 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2817 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2818 | |
2819 | /* | |
2820 | * Reset origin's unique bytes, if it exists. | |
2821 | */ | |
2822 | if (clone->ds_prev) { | |
2823 | dsl_dataset_t *origin = clone->ds_prev; | |
2824 | uint64_t comp, uncomp; | |
2825 | ||
2826 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
2827 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
2828 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
2829 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
2830 | } |
2831 | ||
2832 | /* swap blkptrs */ | |
2833 | { | |
2834 | blkptr_t tmp; | |
d683ddbb JG |
2835 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
2836 | dsl_dataset_phys(origin_head)->ds_bp = | |
2837 | dsl_dataset_phys(clone)->ds_bp; | |
2838 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
13fe0198 MA |
2839 | } |
2840 | ||
2841 | /* set dd_*_bytes */ | |
2842 | { | |
2843 | int64_t dused, dcomp, duncomp; | |
2844 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
2845 | uint64_t odl_used, odl_comp, odl_uncomp; | |
2846 | ||
d683ddbb | 2847 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
2848 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
2849 | ||
2850 | dsl_deadlist_space(&clone->ds_deadlist, | |
2851 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
2852 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
2853 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 2854 | |
d683ddbb JG |
2855 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
2856 | cdl_used - | |
2857 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
2858 | odl_used); | |
2859 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
2860 | cdl_comp - | |
2861 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
2862 | odl_comp); | |
2863 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 2864 | cdl_uncomp - |
d683ddbb JG |
2865 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
2866 | odl_uncomp); | |
45d1cae3 | 2867 | |
13fe0198 MA |
2868 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
2869 | dused, dcomp, duncomp, tx); | |
2870 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
2871 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 2872 | |
45d1cae3 | 2873 | /* |
13fe0198 MA |
2874 | * The difference in the space used by snapshots is the |
2875 | * difference in snapshot space due to the head's | |
2876 | * deadlist (since that's the only thing that's | |
2877 | * changing that affects the snapused). | |
45d1cae3 | 2878 | */ |
13fe0198 MA |
2879 | dsl_deadlist_space_range(&clone->ds_deadlist, |
2880 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
2881 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
2882 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
2883 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
2884 | &odl_used, &odl_comp, &odl_uncomp); | |
2885 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
2886 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 2887 | } |
45d1cae3 | 2888 | |
13fe0198 | 2889 | /* swap ds_*_bytes */ |
d683ddbb JG |
2890 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
2891 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
2892 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
2893 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
2894 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
2895 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
2896 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
2897 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 2898 | |
13fe0198 MA |
2899 | /* apply any parent delta for change in unconsumed refreservation */ |
2900 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
2901 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 2902 | |
13fe0198 MA |
2903 | /* |
2904 | * Swap deadlists. | |
2905 | */ | |
2906 | dsl_deadlist_close(&clone->ds_deadlist); | |
2907 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
2908 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
2909 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 2910 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 2911 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 2912 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 2913 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
45d1cae3 | 2914 | |
13fe0198 | 2915 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 2916 | |
13fe0198 MA |
2917 | spa_history_log_internal_ds(clone, "clone swap", tx, |
2918 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
2919 | } |
2920 | ||
13fe0198 MA |
2921 | /* |
2922 | * Given a pool name and a dataset object number in that pool, | |
2923 | * return the name of that dataset. | |
2924 | */ | |
572e2857 | 2925 | int |
13fe0198 | 2926 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 2927 | { |
13fe0198 MA |
2928 | dsl_pool_t *dp; |
2929 | dsl_dataset_t *ds; | |
572e2857 BB |
2930 | int error; |
2931 | ||
13fe0198 MA |
2932 | error = dsl_pool_hold(pname, FTAG, &dp); |
2933 | if (error != 0) | |
2934 | return (error); | |
2935 | ||
2936 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
2937 | if (error == 0) { | |
2938 | dsl_dataset_name(ds, buf); | |
2939 | dsl_dataset_rele(ds, FTAG); | |
2940 | } | |
2941 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
2942 | |
2943 | return (error); | |
2944 | } | |
2945 | ||
45d1cae3 | 2946 | int |
13fe0198 MA |
2947 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
2948 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 2949 | { |
13fe0198 | 2950 | int error = 0; |
45d1cae3 | 2951 | |
13fe0198 | 2952 | ASSERT3S(asize, >, 0); |
45d1cae3 | 2953 | |
13fe0198 MA |
2954 | /* |
2955 | * *ref_rsrv is the portion of asize that will come from any | |
2956 | * unconsumed refreservation space. | |
2957 | */ | |
2958 | *ref_rsrv = 0; | |
45d1cae3 | 2959 | |
13fe0198 MA |
2960 | mutex_enter(&ds->ds_lock); |
2961 | /* | |
2962 | * Make a space adjustment for reserved bytes. | |
2963 | */ | |
d683ddbb | 2964 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 2965 | ASSERT3U(*used, >=, |
d683ddbb JG |
2966 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
2967 | *used -= | |
2968 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
2969 | *ref_rsrv = |
2970 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
2971 | } |
2972 | ||
13fe0198 MA |
2973 | if (!check_quota || ds->ds_quota == 0) { |
2974 | mutex_exit(&ds->ds_lock); | |
2975 | return (0); | |
45d1cae3 | 2976 | } |
13fe0198 MA |
2977 | /* |
2978 | * If they are requesting more space, and our current estimate | |
2979 | * is over quota, they get to try again unless the actual | |
2980 | * on-disk is over quota and there are no pending changes (which | |
2981 | * may free up space for us). | |
2982 | */ | |
d683ddbb JG |
2983 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
2984 | ds->ds_quota) { | |
13fe0198 | 2985 | if (inflight > 0 || |
d683ddbb | 2986 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 2987 | error = SET_ERROR(ERESTART); |
13fe0198 | 2988 | else |
2e528b49 | 2989 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 2990 | } |
13fe0198 | 2991 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 2992 | |
45d1cae3 BB |
2993 | return (error); |
2994 | } | |
2995 | ||
13fe0198 MA |
2996 | typedef struct dsl_dataset_set_qr_arg { |
2997 | const char *ddsqra_name; | |
2998 | zprop_source_t ddsqra_source; | |
2999 | uint64_t ddsqra_value; | |
3000 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 3001 | |
13fe0198 MA |
3002 | |
3003 | /* ARGSUSED */ | |
45d1cae3 | 3004 | static int |
13fe0198 | 3005 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3006 | { |
13fe0198 MA |
3007 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3008 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3009 | dsl_dataset_t *ds; | |
45d1cae3 | 3010 | int error; |
13fe0198 | 3011 | uint64_t newval; |
45d1cae3 | 3012 | |
13fe0198 | 3013 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 3014 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3015 | |
13fe0198 MA |
3016 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3017 | if (error != 0) | |
3018 | return (error); | |
3019 | ||
0c66c32d | 3020 | if (ds->ds_is_snapshot) { |
13fe0198 | 3021 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3022 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3023 | } |
3024 | ||
13fe0198 MA |
3025 | error = dsl_prop_predict(ds->ds_dir, |
3026 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3027 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3028 | if (error != 0) { | |
3029 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3030 | return (error); |
3031 | } | |
3032 | ||
13fe0198 MA |
3033 | if (newval == 0) { |
3034 | dsl_dataset_rele(ds, FTAG); | |
3035 | return (0); | |
3036 | } | |
3037 | ||
d683ddbb | 3038 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
3039 | newval < ds->ds_reserved) { |
3040 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3041 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3042 | } |
45d1cae3 | 3043 | |
13fe0198 | 3044 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3045 | return (0); |
3046 | } | |
3047 | ||
13fe0198 MA |
3048 | static void |
3049 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3050 | { |
13fe0198 MA |
3051 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3052 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3053 | dsl_dataset_t *ds; | |
3054 | uint64_t newval; | |
45d1cae3 | 3055 | |
13fe0198 | 3056 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 3057 | |
13fe0198 MA |
3058 | dsl_prop_set_sync_impl(ds, |
3059 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3060 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
3061 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3062 | |
13fe0198 MA |
3063 | VERIFY0(dsl_prop_get_int_ds(ds, |
3064 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 3065 | |
13fe0198 MA |
3066 | if (ds->ds_quota != newval) { |
3067 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3068 | ds->ds_quota = newval; | |
45d1cae3 | 3069 | } |
13fe0198 | 3070 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3071 | } |
3072 | ||
13fe0198 MA |
3073 | int |
3074 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
3075 | uint64_t refquota) | |
45d1cae3 | 3076 | { |
13fe0198 | 3077 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3078 | |
13fe0198 MA |
3079 | ddsqra.ddsqra_name = dsname; |
3080 | ddsqra.ddsqra_source = source; | |
3081 | ddsqra.ddsqra_value = refquota; | |
3082 | ||
3083 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3d45fdd6 | 3084 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); |
45d1cae3 BB |
3085 | } |
3086 | ||
3087 | static int | |
13fe0198 | 3088 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3089 | { |
13fe0198 MA |
3090 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3091 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
3092 | dsl_dataset_t *ds; |
3093 | int error; | |
13fe0198 | 3094 | uint64_t newval, unique; |
428870ff | 3095 | |
13fe0198 | 3096 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 3097 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3098 | |
13fe0198 MA |
3099 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3100 | if (error != 0) | |
45d1cae3 | 3101 | return (error); |
45d1cae3 | 3102 | |
0c66c32d | 3103 | if (ds->ds_is_snapshot) { |
13fe0198 | 3104 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3105 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3106 | } |
3107 | ||
13fe0198 MA |
3108 | error = dsl_prop_predict(ds->ds_dir, |
3109 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3110 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3111 | if (error != 0) { | |
3112 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3113 | return (error); |
3114 | } | |
3115 | ||
13fe0198 MA |
3116 | /* |
3117 | * If we are doing the preliminary check in open context, the | |
3118 | * space estimates may be inaccurate. | |
3119 | */ | |
3120 | if (!dmu_tx_is_syncing(tx)) { | |
3121 | dsl_dataset_rele(ds, FTAG); | |
3122 | return (0); | |
45d1cae3 | 3123 | } |
45d1cae3 | 3124 | |
13fe0198 MA |
3125 | mutex_enter(&ds->ds_lock); |
3126 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3127 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 3128 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 3129 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3130 | |
13fe0198 MA |
3131 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
3132 | uint64_t delta = MAX(unique, newval) - | |
3133 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 3134 | |
13fe0198 MA |
3135 | if (delta > |
3136 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3137 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3138 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3139 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3140 | } |
45d1cae3 BB |
3141 | } |
3142 | ||
13fe0198 MA |
3143 | dsl_dataset_rele(ds, FTAG); |
3144 | return (0); | |
45d1cae3 BB |
3145 | } |
3146 | ||
13fe0198 MA |
3147 | void |
3148 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3149 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 3150 | { |
13fe0198 MA |
3151 | uint64_t newval; |
3152 | uint64_t unique; | |
3153 | int64_t delta; | |
428870ff | 3154 | |
13fe0198 MA |
3155 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
3156 | source, sizeof (value), 1, &value, tx); | |
428870ff | 3157 | |
13fe0198 MA |
3158 | VERIFY0(dsl_prop_get_int_ds(ds, |
3159 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 3160 | |
13fe0198 MA |
3161 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
3162 | mutex_enter(&ds->ds_dir->dd_lock); | |
3163 | mutex_enter(&ds->ds_lock); | |
3164 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 3165 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
3166 | delta = MAX(0, (int64_t)(newval - unique)) - |
3167 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3168 | ds->ds_reserved = newval; | |
3169 | mutex_exit(&ds->ds_lock); | |
572e2857 | 3170 | |
13fe0198 MA |
3171 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
3172 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
3173 | } |
3174 | ||
13fe0198 MA |
3175 | static void |
3176 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3177 | { |
13fe0198 MA |
3178 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3179 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 | 3180 | dsl_dataset_t *ds; |
45d1cae3 | 3181 | |
13fe0198 MA |
3182 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
3183 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3184 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3185 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 3186 | } |
428870ff | 3187 | |
428870ff | 3188 | int |
13fe0198 MA |
3189 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
3190 | uint64_t refreservation) | |
428870ff | 3191 | { |
13fe0198 | 3192 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3193 | |
13fe0198 MA |
3194 | ddsqra.ddsqra_name = dsname; |
3195 | ddsqra.ddsqra_source = source; | |
3196 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 3197 | |
13fe0198 | 3198 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
3d45fdd6 MA |
3199 | dsl_dataset_set_refreservation_sync, &ddsqra, |
3200 | 0, ZFS_SPACE_CHECK_NONE)); | |
13fe0198 | 3201 | } |
330d06f9 MA |
3202 | |
3203 | /* | |
3204 | * Return (in *usedp) the amount of space written in new that is not | |
3205 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3206 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3207 | * fail and return EINVAL. | |
3208 | * | |
3209 | * The written space is calculated by considering two components: First, we | |
3210 | * ignore any freed space, and calculate the written as new's used space | |
3211 | * minus old's used space. Next, we add in the amount of space that was freed | |
3212 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3213 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3214 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3215 | * | |
3216 | * space freed [---------------------] | |
3217 | * snapshots ---O-------O--------O-------O------ | |
3218 | * oldsnap new | |
3219 | */ | |
3220 | int | |
3221 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3222 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3223 | { | |
3224 | int err = 0; | |
3225 | uint64_t snapobj; | |
3226 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3227 | ||
13fe0198 MA |
3228 | ASSERT(dsl_pool_config_held(dp)); |
3229 | ||
330d06f9 | 3230 | *usedp = 0; |
d683ddbb JG |
3231 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
3232 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
3233 | |
3234 | *compp = 0; | |
d683ddbb JG |
3235 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
3236 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
3237 | |
3238 | *uncompp = 0; | |
d683ddbb JG |
3239 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
3240 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 3241 | |
330d06f9 MA |
3242 | snapobj = new->ds_object; |
3243 | while (snapobj != oldsnap->ds_object) { | |
3244 | dsl_dataset_t *snap; | |
3245 | uint64_t used, comp, uncomp; | |
3246 | ||
9ae529ec CS |
3247 | if (snapobj == new->ds_object) { |
3248 | snap = new; | |
3249 | } else { | |
3250 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3251 | if (err != 0) | |
3252 | break; | |
3253 | } | |
330d06f9 | 3254 | |
d683ddbb JG |
3255 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
3256 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
3257 | /* |
3258 | * The blocks in the deadlist can not be born after | |
3259 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3260 | * which is more efficient (especially for old-format | |
3261 | * deadlists). Unfortunately the deadlist code | |
3262 | * doesn't have enough information to make this | |
3263 | * optimization itself. | |
3264 | */ | |
3265 | dsl_deadlist_space(&snap->ds_deadlist, | |
3266 | &used, &comp, &uncomp); | |
3267 | } else { | |
3268 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 3269 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
3270 | &used, &comp, &uncomp); |
3271 | } | |
3272 | *usedp += used; | |
3273 | *compp += comp; | |
3274 | *uncompp += uncomp; | |
3275 | ||
3276 | /* | |
3277 | * If we get to the beginning of the chain of snapshots | |
3278 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3279 | * was not a snapshot of/before new. | |
3280 | */ | |
d683ddbb | 3281 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
3282 | if (snap != new) |
3283 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 3284 | if (snapobj == 0) { |
2e528b49 | 3285 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
3286 | break; |
3287 | } | |
3288 | ||
3289 | } | |
330d06f9 MA |
3290 | return (err); |
3291 | } | |
3292 | ||
3293 | /* | |
3294 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3295 | * lastsnap, and all snapshots in between are deleted. | |
3296 | * | |
3297 | * blocks that would be freed [---------------------------] | |
3298 | * snapshots ---O-------O--------O-------O--------O | |
3299 | * firstsnap lastsnap | |
3300 | * | |
3301 | * This is the set of blocks that were born after the snap before firstsnap, | |
3302 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3303 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3304 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3305 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3306 | * space on the deadlist that was born after the snap before firstsnap. | |
3307 | */ | |
3308 | int | |
3309 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3310 | dsl_dataset_t *lastsnap, | |
3311 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3312 | { | |
3313 | int err = 0; | |
3314 | uint64_t snapobj; | |
3315 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3316 | ||
0c66c32d JG |
3317 | ASSERT(firstsnap->ds_is_snapshot); |
3318 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
3319 | |
3320 | /* | |
3321 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3322 | * is before lastsnap. | |
3323 | */ | |
3324 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
3325 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
3326 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 3327 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
3328 | |
3329 | *usedp = *compp = *uncompp = 0; | |
3330 | ||
d683ddbb | 3331 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
3332 | while (snapobj != firstsnap->ds_object) { |
3333 | dsl_dataset_t *ds; | |
3334 | uint64_t used, comp, uncomp; | |
3335 | ||
3336 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3337 | if (err != 0) | |
3338 | break; | |
3339 | ||
3340 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 3341 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
3342 | &used, &comp, &uncomp); |
3343 | *usedp += used; | |
3344 | *compp += comp; | |
3345 | *uncompp += uncomp; | |
3346 | ||
d683ddbb | 3347 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
3348 | ASSERT3U(snapobj, !=, 0); |
3349 | dsl_dataset_rele(ds, FTAG); | |
3350 | } | |
330d06f9 MA |
3351 | return (err); |
3352 | } | |
3353 | ||
13fe0198 MA |
3354 | /* |
3355 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3356 | * For example, they could both be snapshots of the same filesystem, and | |
3357 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3358 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3359 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
3360 | * |
3361 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
3362 | */ |
3363 | boolean_t | |
da536844 MA |
3364 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
3365 | uint64_t earlier_txg) | |
13fe0198 MA |
3366 | { |
3367 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3368 | int error; | |
3369 | boolean_t ret; | |
3370 | dsl_dataset_t *origin; | |
3371 | ||
3372 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 3373 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
3374 | |
3375 | if (earlier_txg == 0) | |
d683ddbb | 3376 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 3377 | |
0c66c32d | 3378 | if (later->ds_is_snapshot && |
d683ddbb | 3379 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
3380 | return (B_FALSE); |
3381 | ||
3382 | if (later->ds_dir == earlier->ds_dir) | |
3383 | return (B_TRUE); | |
3384 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3385 | return (B_FALSE); | |
3386 | ||
d683ddbb | 3387 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 MA |
3388 | return (B_TRUE); |
3389 | error = dsl_dataset_hold_obj(dp, | |
d683ddbb | 3390 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
3391 | if (error != 0) |
3392 | return (B_FALSE); | |
da536844 | 3393 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
3394 | dsl_dataset_rele(origin, FTAG); |
3395 | return (ret); | |
3396 | } | |
3397 | ||
fa86b5db MA |
3398 | void |
3399 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3400 | { | |
3401 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3402 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3403 | } | |
3404 | ||
c28b2279 | 3405 | #if defined(_KERNEL) && defined(HAVE_SPL) |
f1512ee6 MA |
3406 | #if defined(_LP64) |
3407 | module_param(zfs_max_recordsize, int, 0644); | |
3408 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3409 | #else | |
3410 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3411 | module_param(zfs_max_recordsize, int, 0444); | |
3412 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3413 | #endif | |
3414 | ||
c28b2279 BB |
3415 | EXPORT_SYMBOL(dsl_dataset_hold); |
3416 | EXPORT_SYMBOL(dsl_dataset_hold_obj); | |
3417 | EXPORT_SYMBOL(dsl_dataset_own); | |
3418 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3419 | EXPORT_SYMBOL(dsl_dataset_name); | |
3420 | EXPORT_SYMBOL(dsl_dataset_rele); | |
3421 | EXPORT_SYMBOL(dsl_dataset_disown); | |
c28b2279 | 3422 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
3423 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
3424 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
3425 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
3426 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 3427 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
3428 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
3429 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
3430 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
3431 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
3432 | EXPORT_SYMBOL(dsl_dataset_set_blkptr); | |
3433 | EXPORT_SYMBOL(dsl_dataset_get_spa); | |
19580676 | 3434 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
3435 | EXPORT_SYMBOL(dsl_dataset_space_written); |
3436 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
3437 | EXPORT_SYMBOL(dsl_dataset_sync); |
3438 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3439 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
3440 | EXPORT_SYMBOL(dsl_dataset_block_freeable); | |
3441 | EXPORT_SYMBOL(dsl_dataset_prev_snap_txg); | |
3442 | EXPORT_SYMBOL(dsl_dataset_dirty); | |
3443 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3444 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3445 | EXPORT_SYMBOL(dsl_dataset_space); | |
3446 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3447 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3448 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
3449 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
3450 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 3451 | #endif |