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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. |
a0bd735a | 27 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. |
8c62a0d0 | 28 | * Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved. |
34dc7c2f BB |
29 | */ |
30 | ||
34dc7c2f BB |
31 | #include <sys/dmu_objset.h> |
32 | #include <sys/dsl_dataset.h> | |
33 | #include <sys/dsl_dir.h> | |
34 | #include <sys/dsl_prop.h> | |
35 | #include <sys/dsl_synctask.h> | |
36 | #include <sys/dmu_traverse.h> | |
37abac6d | 37 | #include <sys/dmu_impl.h> |
34dc7c2f BB |
38 | #include <sys/dmu_tx.h> |
39 | #include <sys/arc.h> | |
40 | #include <sys/zio.h> | |
41 | #include <sys/zap.h> | |
9ae529ec | 42 | #include <sys/zfeature.h> |
34dc7c2f BB |
43 | #include <sys/unique.h> |
44 | #include <sys/zfs_context.h> | |
45 | #include <sys/zfs_ioctl.h> | |
46 | #include <sys/spa.h> | |
b128c09f | 47 | #include <sys/zfs_znode.h> |
572e2857 | 48 | #include <sys/zfs_onexit.h> |
45d1cae3 | 49 | #include <sys/zvol.h> |
428870ff BB |
50 | #include <sys/dsl_scan.h> |
51 | #include <sys/dsl_deadlist.h> | |
13fe0198 MA |
52 | #include <sys/dsl_destroy.h> |
53 | #include <sys/dsl_userhold.h> | |
da536844 | 54 | #include <sys/dsl_bookmark.h> |
f74b821a | 55 | #include <sys/policy.h> |
47dfff3b MA |
56 | #include <sys/dmu_send.h> |
57 | #include <sys/zio_compress.h> | |
58 | #include <zfs_fletcher.h> | |
34dc7c2f | 59 | |
f1512ee6 MA |
60 | /* |
61 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
62 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
63 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
64 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
65 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
66 | * and pools with larger blocks can always be imported and used, regardless | |
67 | * of this setting. | |
68 | */ | |
69 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
70 | ||
428870ff BB |
71 | #define SWITCH64(x, y) \ |
72 | { \ | |
73 | uint64_t __tmp = (x); \ | |
74 | (x) = (y); \ | |
75 | (y) = __tmp; \ | |
76 | } | |
77 | ||
34dc7c2f BB |
78 | #define DS_REF_MAX (1ULL << 62) |
79 | ||
d683ddbb | 80 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 81 | |
8c62a0d0 DM |
82 | extern int spa_asize_inflation; |
83 | ||
34dc7c2f BB |
84 | /* |
85 | * Figure out how much of this delta should be propogated to the dsl_dir | |
86 | * layer. If there's a refreservation, that space has already been | |
87 | * partially accounted for in our ancestors. | |
88 | */ | |
89 | static int64_t | |
90 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
91 | { | |
d683ddbb | 92 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
93 | uint64_t old_bytes, new_bytes; |
94 | ||
95 | if (ds->ds_reserved == 0) | |
96 | return (delta); | |
97 | ||
d683ddbb JG |
98 | ds_phys = dsl_dataset_phys(ds); |
99 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
100 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
34dc7c2f BB |
101 | |
102 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
103 | return (new_bytes - old_bytes); | |
104 | } | |
105 | ||
106 | void | |
428870ff | 107 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 108 | { |
d6320ddb | 109 | int used, compressed, uncompressed; |
34dc7c2f BB |
110 | int64_t delta; |
111 | ||
d6320ddb BB |
112 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
113 | compressed = BP_GET_PSIZE(bp); | |
114 | uncompressed = BP_GET_UCSIZE(bp); | |
115 | ||
428870ff | 116 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
117 | |
118 | ASSERT(dmu_tx_is_syncing(tx)); | |
119 | /* It could have been compressed away to nothing */ | |
120 | if (BP_IS_HOLE(bp)) | |
121 | return; | |
122 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 123 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 124 | if (ds == NULL) { |
29809a6c MA |
125 | dsl_pool_mos_diduse_space(tx->tx_pool, |
126 | used, compressed, uncompressed); | |
34dc7c2f BB |
127 | return; |
128 | } | |
428870ff | 129 | |
a169a625 | 130 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
131 | mutex_enter(&ds->ds_lock); |
132 | delta = parent_delta(ds, used); | |
d683ddbb JG |
133 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
134 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
135 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
136 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
241b5415 MA |
137 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
138 | ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = | |
139 | B_TRUE; | |
140 | } | |
34dc7c2f | 141 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
142 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
143 | compressed, uncompressed, tx); | |
144 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
145 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
146 | } |
147 | ||
b128c09f | 148 | int |
428870ff BB |
149 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
150 | boolean_t async) | |
34dc7c2f | 151 | { |
b0bc7a84 MG |
152 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
153 | int compressed = BP_GET_PSIZE(bp); | |
154 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 155 | |
34dc7c2f | 156 | if (BP_IS_HOLE(bp)) |
b128c09f | 157 | return (0); |
34dc7c2f | 158 | |
428870ff BB |
159 | ASSERT(dmu_tx_is_syncing(tx)); |
160 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
161 | ||
34dc7c2f | 162 | if (ds == NULL) { |
428870ff | 163 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
164 | dsl_pool_mos_diduse_space(tx->tx_pool, |
165 | -used, -compressed, -uncompressed); | |
b128c09f | 166 | return (used); |
34dc7c2f BB |
167 | } |
168 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
169 | ||
0c66c32d | 170 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
171 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
172 | ||
d683ddbb | 173 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
174 | int64_t delta; |
175 | ||
428870ff BB |
176 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
177 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
178 | |
179 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 180 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
181 | !DS_UNIQUE_IS_ACCURATE(ds)); |
182 | delta = parent_delta(ds, -used); | |
d683ddbb | 183 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 184 | mutex_exit(&ds->ds_lock); |
b128c09f | 185 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 186 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
187 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
188 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
189 | } else { |
190 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
191 | if (async) { |
192 | /* | |
193 | * We are here as part of zio's write done callback, | |
194 | * which means we're a zio interrupt thread. We can't | |
195 | * call dsl_deadlist_insert() now because it may block | |
196 | * waiting for I/O. Instead, put bp on the deferred | |
197 | * queue and let dsl_pool_sync() finish the job. | |
198 | */ | |
199 | bplist_append(&ds->ds_pending_deadlist, bp); | |
200 | } else { | |
201 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
202 | } | |
34dc7c2f | 203 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
204 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
205 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 206 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 207 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 208 | ds->ds_object && bp->blk_birth > |
d683ddbb | 209 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
210 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
211 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 212 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
213 | mutex_exit(&ds->ds_prev->ds_lock); |
214 | } | |
428870ff | 215 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
216 | dsl_dir_transfer_space(ds->ds_dir, used, |
217 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
218 | } | |
34dc7c2f BB |
219 | } |
220 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
221 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
222 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
223 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
224 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
225 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
226 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 227 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
228 | |
229 | return (used); | |
34dc7c2f BB |
230 | } |
231 | ||
232 | uint64_t | |
233 | dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
234 | { | |
235 | uint64_t trysnap = 0; | |
236 | ||
237 | if (ds == NULL) | |
238 | return (0); | |
239 | /* | |
240 | * The snapshot creation could fail, but that would cause an | |
241 | * incorrect FALSE return, which would only result in an | |
242 | * overestimation of the amount of space that an operation would | |
243 | * consume, which is OK. | |
244 | * | |
245 | * There's also a small window where we could miss a pending | |
246 | * snapshot, because we could set the sync task in the quiescing | |
247 | * phase. So this should only be used as a guess. | |
248 | */ | |
249 | if (ds->ds_trysnap_txg > | |
250 | spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
251 | trysnap = ds->ds_trysnap_txg; | |
d683ddbb | 252 | return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); |
34dc7c2f BB |
253 | } |
254 | ||
9babb374 | 255 | boolean_t |
428870ff BB |
256 | dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, |
257 | uint64_t blk_birth) | |
34dc7c2f | 258 | { |
b0bc7a84 MG |
259 | if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || |
260 | (bp != NULL && BP_IS_HOLE(bp))) | |
428870ff BB |
261 | return (B_FALSE); |
262 | ||
572e2857 | 263 | ddt_prefetch(dsl_dataset_get_spa(ds), bp); |
428870ff BB |
264 | |
265 | return (B_TRUE); | |
34dc7c2f BB |
266 | } |
267 | ||
34dc7c2f | 268 | static void |
0c66c32d | 269 | dsl_dataset_evict(void *dbu) |
34dc7c2f | 270 | { |
0c66c32d | 271 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 272 | |
13fe0198 | 273 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 274 | |
0c66c32d JG |
275 | ds->ds_dbuf = NULL; |
276 | ||
34dc7c2f BB |
277 | unique_remove(ds->ds_fsid_guid); |
278 | ||
428870ff BB |
279 | if (ds->ds_objset != NULL) |
280 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
281 | |
282 | if (ds->ds_prev) { | |
13fe0198 | 283 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
284 | ds->ds_prev = NULL; |
285 | } | |
286 | ||
428870ff | 287 | bplist_destroy(&ds->ds_pending_deadlist); |
0c66c32d | 288 | if (ds->ds_deadlist.dl_os != NULL) |
428870ff | 289 | dsl_deadlist_close(&ds->ds_deadlist); |
b128c09f | 290 | if (ds->ds_dir) |
0c66c32d | 291 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
292 | |
293 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
294 | ||
0eb21616 | 295 | list_destroy(&ds->ds_prop_cbs); |
34dc7c2f BB |
296 | mutex_destroy(&ds->ds_lock); |
297 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 298 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 299 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f BB |
300 | |
301 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
302 | } | |
303 | ||
13fe0198 | 304 | int |
34dc7c2f BB |
305 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
306 | { | |
307 | dsl_dataset_phys_t *headphys; | |
308 | int err; | |
309 | dmu_buf_t *headdbuf; | |
310 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
311 | objset_t *mos = dp->dp_meta_objset; | |
312 | ||
313 | if (ds->ds_snapname[0]) | |
314 | return (0); | |
d683ddbb | 315 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
316 | return (0); |
317 | ||
d683ddbb | 318 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 319 | FTAG, &headdbuf); |
13fe0198 | 320 | if (err != 0) |
34dc7c2f BB |
321 | return (err); |
322 | headphys = headdbuf->db_data; | |
323 | err = zap_value_search(dp->dp_meta_objset, | |
324 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
325 | if (err != 0 && zfs_recover == B_TRUE) { |
326 | err = 0; | |
327 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
328 | "SNAPOBJ=%llu-ERR=%d", | |
329 | (unsigned long long)ds->ds_object, err); | |
330 | } | |
34dc7c2f BB |
331 | dmu_buf_rele(headdbuf, FTAG); |
332 | return (err); | |
333 | } | |
334 | ||
6772fb67 | 335 | int |
b128c09f | 336 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 337 | { |
b128c09f | 338 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 339 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
340 | matchtype_t mt; |
341 | int err; | |
342 | ||
d683ddbb | 343 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
344 | mt = MT_FIRST; |
345 | else | |
346 | mt = MT_EXACT; | |
347 | ||
b128c09f | 348 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f BB |
349 | value, mt, NULL, 0, NULL); |
350 | if (err == ENOTSUP && mt == MT_FIRST) | |
b128c09f | 351 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
352 | return (err); |
353 | } | |
354 | ||
13fe0198 | 355 | int |
788eb90c JJ |
356 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
357 | boolean_t adj_cnt) | |
34dc7c2f | 358 | { |
b128c09f | 359 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 360 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
361 | matchtype_t mt; |
362 | int err; | |
363 | ||
428870ff BB |
364 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
365 | ||
d683ddbb | 366 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
367 | mt = MT_FIRST; |
368 | else | |
369 | mt = MT_EXACT; | |
370 | ||
b128c09f | 371 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
34dc7c2f | 372 | if (err == ENOTSUP && mt == MT_FIRST) |
b128c09f | 373 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
374 | |
375 | if (err == 0 && adj_cnt) | |
376 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
377 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
378 | ||
34dc7c2f BB |
379 | return (err); |
380 | } | |
381 | ||
6ebebace JG |
382 | boolean_t |
383 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
384 | { | |
6186e297 JG |
385 | dmu_buf_t *dbuf = ds->ds_dbuf; |
386 | boolean_t result = B_FALSE; | |
387 | ||
388 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
389 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
390 | ||
391 | if (ds == dmu_buf_get_user(dbuf)) | |
392 | result = B_TRUE; | |
393 | else | |
394 | dmu_buf_rele(dbuf, tag); | |
395 | } | |
396 | ||
397 | return (result); | |
6ebebace JG |
398 | } |
399 | ||
13fe0198 MA |
400 | int |
401 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, | |
b128c09f | 402 | dsl_dataset_t **dsp) |
34dc7c2f | 403 | { |
34dc7c2f BB |
404 | objset_t *mos = dp->dp_meta_objset; |
405 | dmu_buf_t *dbuf; | |
406 | dsl_dataset_t *ds; | |
407 | int err; | |
572e2857 | 408 | dmu_object_info_t doi; |
34dc7c2f | 409 | |
13fe0198 | 410 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
411 | |
412 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 413 | if (err != 0) |
34dc7c2f | 414 | return (err); |
572e2857 BB |
415 | |
416 | /* Make sure dsobj has the correct object type. */ | |
417 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 418 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 419 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 420 | return (SET_ERROR(EINVAL)); |
3a84951d | 421 | } |
572e2857 | 422 | |
34dc7c2f BB |
423 | ds = dmu_buf_get_user(dbuf); |
424 | if (ds == NULL) { | |
d4ed6673 | 425 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 426 | |
79c76d5b | 427 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
428 | ds->ds_dbuf = dbuf; |
429 | ds->ds_object = dsobj; | |
0c66c32d | 430 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 431 | list_link_init(&ds->ds_synced_link); |
34dc7c2f BB |
432 | |
433 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
434 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 435 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
13fe0198 | 436 | refcount_create(&ds->ds_longholds); |
34dc7c2f | 437 | |
428870ff BB |
438 | bplist_create(&ds->ds_pending_deadlist); |
439 | dsl_deadlist_open(&ds->ds_deadlist, | |
d683ddbb | 440 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); |
428870ff | 441 | |
37abac6d BP |
442 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
443 | offsetof(dmu_sendarg_t, dsa_link)); | |
444 | ||
0eb21616 JG |
445 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
446 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
447 | ||
f1512ee6 | 448 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
449 | spa_feature_t f; |
450 | ||
451 | for (f = 0; f < SPA_FEATURES; f++) { | |
452 | if (!(spa_feature_table[f].fi_flags & | |
453 | ZFEATURE_FLAG_PER_DATASET)) | |
454 | continue; | |
455 | err = zap_contains(mos, dsobj, | |
456 | spa_feature_table[f].fi_guid); | |
457 | if (err == 0) { | |
458 | ds->ds_feature_inuse[f] = B_TRUE; | |
459 | } else { | |
460 | ASSERT3U(err, ==, ENOENT); | |
461 | err = 0; | |
462 | } | |
19b3b1d2 | 463 | } |
f1512ee6 MA |
464 | } |
465 | ||
241b5415 MA |
466 | err = dsl_dir_hold_obj(dp, |
467 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
13fe0198 | 468 | if (err != 0) { |
34dc7c2f BB |
469 | mutex_destroy(&ds->ds_lock); |
470 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 471 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 472 | refcount_destroy(&ds->ds_longholds); |
428870ff BB |
473 | bplist_destroy(&ds->ds_pending_deadlist); |
474 | dsl_deadlist_close(&ds->ds_deadlist); | |
34dc7c2f BB |
475 | kmem_free(ds, sizeof (dsl_dataset_t)); |
476 | dmu_buf_rele(dbuf, tag); | |
477 | return (err); | |
478 | } | |
479 | ||
0c66c32d | 480 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 481 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 482 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 483 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 484 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 485 | ds, &ds->ds_prev); |
34dc7c2f | 486 | } |
da536844 MA |
487 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
488 | int zaperr = zap_lookup(mos, ds->ds_object, | |
489 | DS_FIELD_BOOKMARK_NAMES, | |
490 | sizeof (ds->ds_bookmarks), 1, | |
491 | &ds->ds_bookmarks); | |
492 | if (zaperr != ENOENT) | |
493 | VERIFY0(zaperr); | |
494 | } | |
45d1cae3 BB |
495 | } else { |
496 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
497 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
498 | if (err == 0 && |
499 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
500 | err = zap_count( |
501 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 502 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
503 | &ds->ds_userrefs); |
504 | } | |
34dc7c2f BB |
505 | } |
506 | ||
0c66c32d | 507 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
508 | err = dsl_prop_get_int_ds(ds, |
509 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
510 | &ds->ds_reserved); | |
34dc7c2f | 511 | if (err == 0) { |
13fe0198 MA |
512 | err = dsl_prop_get_int_ds(ds, |
513 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
514 | &ds->ds_quota); | |
34dc7c2f | 515 | } |
34dc7c2f BB |
516 | } else { |
517 | ds->ds_reserved = ds->ds_quota = 0; | |
518 | } | |
519 | ||
0c66c32d JG |
520 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); |
521 | if (err == 0) | |
522 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
523 | ||
524 | if (err != 0 || winner != NULL) { | |
428870ff BB |
525 | bplist_destroy(&ds->ds_pending_deadlist); |
526 | dsl_deadlist_close(&ds->ds_deadlist); | |
b128c09f | 527 | if (ds->ds_prev) |
13fe0198 MA |
528 | dsl_dataset_rele(ds->ds_prev, ds); |
529 | dsl_dir_rele(ds->ds_dir, ds); | |
34dc7c2f BB |
530 | mutex_destroy(&ds->ds_lock); |
531 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 532 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 533 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f | 534 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 535 | if (err != 0) { |
34dc7c2f BB |
536 | dmu_buf_rele(dbuf, tag); |
537 | return (err); | |
538 | } | |
539 | ds = winner; | |
540 | } else { | |
541 | ds->ds_fsid_guid = | |
d683ddbb | 542 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
34dc7c2f BB |
543 | } |
544 | } | |
545 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
d683ddbb JG |
546 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
547 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
548 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
549 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f BB |
550 | *dsp = ds; |
551 | return (0); | |
552 | } | |
553 | ||
b128c09f | 554 | int |
13fe0198 | 555 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, |
428870ff | 556 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
557 | { |
558 | dsl_dir_t *dd; | |
b128c09f | 559 | const char *snapname; |
34dc7c2f | 560 | uint64_t obj; |
34dc7c2f | 561 | int err = 0; |
fcff0f35 | 562 | dsl_dataset_t *ds; |
34dc7c2f | 563 | |
13fe0198 MA |
564 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
565 | if (err != 0) | |
34dc7c2f BB |
566 | return (err); |
567 | ||
13fe0198 | 568 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 569 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 | 570 | if (obj != 0) |
fcff0f35 | 571 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
b128c09f | 572 | else |
2e528b49 | 573 | err = SET_ERROR(ENOENT); |
34dc7c2f | 574 | |
b128c09f BB |
575 | /* we may be looking for a snapshot */ |
576 | if (err == 0 && snapname != NULL) { | |
fcff0f35 | 577 | dsl_dataset_t *snap_ds; |
34dc7c2f | 578 | |
b128c09f | 579 | if (*snapname++ != '@') { |
fcff0f35 | 580 | dsl_dataset_rele(ds, tag); |
13fe0198 | 581 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 582 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 583 | } |
34dc7c2f | 584 | |
b128c09f | 585 | dprintf("looking for snapshot '%s'\n", snapname); |
fcff0f35 | 586 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
b128c09f | 587 | if (err == 0) |
fcff0f35 PD |
588 | err = dsl_dataset_hold_obj(dp, obj, tag, &snap_ds); |
589 | dsl_dataset_rele(ds, tag); | |
b128c09f | 590 | |
13fe0198 | 591 | if (err == 0) { |
fcff0f35 PD |
592 | mutex_enter(&snap_ds->ds_lock); |
593 | if (snap_ds->ds_snapname[0] == 0) | |
594 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
595 | sizeof (snap_ds->ds_snapname)); | |
596 | mutex_exit(&snap_ds->ds_lock); | |
597 | ds = snap_ds; | |
34dc7c2f | 598 | } |
34dc7c2f | 599 | } |
fcff0f35 PD |
600 | if (err == 0) |
601 | *dsp = ds; | |
13fe0198 | 602 | dsl_dir_rele(dd, FTAG); |
34dc7c2f BB |
603 | return (err); |
604 | } | |
605 | ||
606 | int | |
13fe0198 | 607 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, |
428870ff | 608 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 609 | { |
13fe0198 MA |
610 | int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); |
611 | if (err != 0) | |
612 | return (err); | |
613 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
614 | dsl_dataset_rele(*dsp, tag); | |
615 | *dsp = NULL; | |
2e528b49 | 616 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
617 | } |
618 | return (0); | |
619 | } | |
620 | ||
621 | int | |
622 | dsl_dataset_own(dsl_pool_t *dp, const char *name, | |
623 | void *tag, dsl_dataset_t **dsp) | |
624 | { | |
625 | int err = dsl_dataset_hold(dp, name, tag, dsp); | |
626 | if (err != 0) | |
b128c09f | 627 | return (err); |
13fe0198 | 628 | if (!dsl_dataset_tryown(*dsp, tag)) { |
428870ff | 629 | dsl_dataset_rele(*dsp, tag); |
2e528b49 | 630 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
631 | } |
632 | return (0); | |
34dc7c2f BB |
633 | } |
634 | ||
13fe0198 MA |
635 | /* |
636 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
637 | * hold is used to prevent destruction of a dataset while the pool hold | |
638 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
639 | * | |
640 | * The dataset and pool must be held when this function is called. After it | |
641 | * is called, the pool hold may be released while the dataset is still held | |
642 | * and accessed. | |
643 | */ | |
644 | void | |
645 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
646 | { | |
647 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
648 | (void) refcount_add(&ds->ds_longholds, tag); | |
649 | } | |
650 | ||
651 | void | |
652 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
653 | { | |
654 | (void) refcount_remove(&ds->ds_longholds, tag); | |
655 | } | |
656 | ||
657 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
658 | boolean_t | |
659 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
660 | { | |
661 | return (!refcount_is_zero(&ds->ds_longholds)); | |
662 | } | |
663 | ||
34dc7c2f BB |
664 | void |
665 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
666 | { | |
667 | if (ds == NULL) { | |
668 | (void) strcpy(name, "mos"); | |
669 | } else { | |
670 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 671 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f | 672 | if (ds->ds_snapname[0]) { |
eca7b760 IK |
673 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
674 | <, ZFS_MAX_DATASET_NAME_LEN); | |
b128c09f BB |
675 | /* |
676 | * We use a "recursive" mutex so that we | |
677 | * can call dprintf_ds() with ds_lock held. | |
678 | */ | |
34dc7c2f | 679 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f | 680 | mutex_enter(&ds->ds_lock); |
eca7b760 IK |
681 | VERIFY3U(strlcat(name, ds->ds_snapname, |
682 | ZFS_MAX_DATASET_NAME_LEN), <, | |
683 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
684 | mutex_exit(&ds->ds_lock); |
685 | } else { | |
eca7b760 IK |
686 | VERIFY3U(strlcat(name, ds->ds_snapname, |
687 | ZFS_MAX_DATASET_NAME_LEN), <, | |
688 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
689 | } |
690 | } | |
691 | } | |
692 | } | |
693 | ||
eca7b760 IK |
694 | int |
695 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
696 | { | |
697 | int len; | |
698 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
699 | mutex_enter(&ds->ds_lock); | |
700 | len = dsl_dir_namelen(ds->ds_dir) + 1 + strlen(ds->ds_snapname); | |
701 | mutex_exit(&ds->ds_lock); | |
702 | return (len); | |
703 | } | |
704 | ||
34dc7c2f | 705 | void |
b128c09f BB |
706 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
707 | { | |
13fe0198 | 708 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
709 | } |
710 | ||
711 | void | |
428870ff | 712 | dsl_dataset_disown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 713 | { |
945dd935 JG |
714 | ASSERT3P(ds->ds_owner, ==, tag); |
715 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 716 | |
34dc7c2f | 717 | mutex_enter(&ds->ds_lock); |
b128c09f | 718 | ds->ds_owner = NULL; |
34dc7c2f | 719 | mutex_exit(&ds->ds_lock); |
13fe0198 | 720 | dsl_dataset_long_rele(ds, tag); |
945dd935 | 721 | dsl_dataset_rele(ds, tag); |
34dc7c2f BB |
722 | } |
723 | ||
724 | boolean_t | |
13fe0198 | 725 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 726 | { |
b128c09f BB |
727 | boolean_t gotit = FALSE; |
728 | ||
47dfff3b | 729 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
34dc7c2f | 730 | mutex_enter(&ds->ds_lock); |
13fe0198 | 731 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 732 | ds->ds_owner = tag; |
13fe0198 | 733 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 734 | gotit = TRUE; |
34dc7c2f BB |
735 | } |
736 | mutex_exit(&ds->ds_lock); | |
b128c09f | 737 | return (gotit); |
34dc7c2f BB |
738 | } |
739 | ||
47dfff3b MA |
740 | boolean_t |
741 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
742 | { | |
743 | boolean_t rv; | |
744 | mutex_enter(&ds->ds_lock); | |
745 | rv = (ds->ds_owner != NULL); | |
746 | mutex_exit(&ds->ds_lock); | |
747 | return (rv); | |
748 | } | |
749 | ||
241b5415 MA |
750 | static void |
751 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
752 | { | |
753 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
754 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
755 | uint64_t zero = 0; | |
756 | ||
757 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
758 | ||
759 | spa_feature_incr(spa, f, tx); | |
760 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
761 | ||
762 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
763 | sizeof (zero), 1, &zero, tx)); | |
764 | } | |
765 | ||
766 | void | |
767 | dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
768 | { | |
769 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
770 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
771 | ||
772 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
773 | ||
774 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
775 | spa_feature_decr(spa, f, tx); | |
776 | } | |
777 | ||
34dc7c2f | 778 | uint64_t |
b128c09f | 779 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
34dc7c2f BB |
780 | uint64_t flags, dmu_tx_t *tx) |
781 | { | |
782 | dsl_pool_t *dp = dd->dd_pool; | |
783 | dmu_buf_t *dbuf; | |
784 | dsl_dataset_phys_t *dsphys; | |
785 | uint64_t dsobj; | |
786 | objset_t *mos = dp->dp_meta_objset; | |
787 | ||
b128c09f BB |
788 | if (origin == NULL) |
789 | origin = dp->dp_origin_snap; | |
790 | ||
34dc7c2f | 791 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 792 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 793 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 794 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
795 | |
796 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
797 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 798 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
799 | dmu_buf_will_dirty(dbuf, tx); |
800 | dsphys = dbuf->db_data; | |
b128c09f | 801 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
802 | dsphys->ds_dir_obj = dd->dd_object; |
803 | dsphys->ds_flags = flags; | |
804 | dsphys->ds_fsid_guid = unique_create(); | |
805 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
806 | sizeof (dsphys->ds_guid)); | |
807 | dsphys->ds_snapnames_zapobj = | |
808 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
809 | DMU_OT_NONE, 0, tx); | |
810 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 811 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 812 | |
428870ff BB |
813 | if (origin == NULL) { |
814 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
815 | } else { | |
241b5415 | 816 | spa_feature_t f; |
13fe0198 | 817 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 818 | |
34dc7c2f BB |
819 | dsphys->ds_prev_snap_obj = origin->ds_object; |
820 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 821 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 822 | dsphys->ds_referenced_bytes = |
d683ddbb | 823 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 824 | dsphys->ds_compressed_bytes = |
d683ddbb | 825 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 826 | dsphys->ds_uncompressed_bytes = |
d683ddbb JG |
827 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
828 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; | |
4b20a6f5 MA |
829 | |
830 | /* | |
831 | * Inherit flags that describe the dataset's contents | |
832 | * (INCONSISTENT) or properties (Case Insensitive). | |
833 | */ | |
d683ddbb | 834 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 835 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 836 | |
241b5415 MA |
837 | for (f = 0; f < SPA_FEATURES; f++) { |
838 | if (origin->ds_feature_inuse[f]) | |
839 | dsl_dataset_activate_feature(dsobj, f, tx); | |
840 | } | |
f1512ee6 | 841 | |
34dc7c2f | 842 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 843 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 844 | |
13fe0198 | 845 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
846 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
847 | FTAG, &ohds)); | |
428870ff BB |
848 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
849 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
850 | dsl_dataset_rele(ohds, FTAG); | |
851 | ||
b128c09f | 852 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
853 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
854 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
855 | zap_create(mos, |
856 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
857 | } | |
13fe0198 | 858 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
859 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
860 | dsobj, tx)); | |
b128c09f BB |
861 | } |
862 | ||
34dc7c2f | 863 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 864 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 865 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 866 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 867 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 868 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
869 | zap_create(mos, |
870 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
871 | } | |
13fe0198 | 872 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
873 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
874 | dsobj, tx)); | |
428870ff | 875 | } |
34dc7c2f BB |
876 | } |
877 | ||
878 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
879 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
880 | ||
881 | dmu_buf_rele(dbuf, FTAG); | |
882 | ||
883 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 884 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
885 | |
886 | return (dsobj); | |
887 | } | |
888 | ||
13fe0198 MA |
889 | static void |
890 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
891 | { | |
892 | objset_t *os; | |
893 | ||
894 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
895 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
896 | dsl_dataset_dirty(ds, tx); | |
897 | } | |
898 | ||
34dc7c2f BB |
899 | uint64_t |
900 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
901 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) | |
902 | { | |
903 | dsl_pool_t *dp = pdd->dd_pool; | |
904 | uint64_t dsobj, ddobj; | |
905 | dsl_dir_t *dd; | |
906 | ||
13fe0198 | 907 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
908 | ASSERT(lastname[0] != '@'); |
909 | ||
b128c09f | 910 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 911 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 912 | |
13fe0198 MA |
913 | dsobj = dsl_dataset_create_sync_dd(dd, origin, |
914 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); | |
34dc7c2f BB |
915 | |
916 | dsl_deleg_set_create_perms(dd, tx, cr); | |
917 | ||
788eb90c JJ |
918 | /* |
919 | * Since we're creating a new node we know it's a leaf, so we can | |
920 | * initialize the counts if the limit feature is active. | |
921 | */ | |
922 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
923 | uint64_t cnt = 0; | |
924 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
925 | ||
926 | dsl_dir_zapify(dd, tx); | |
927 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
928 | sizeof (cnt), 1, &cnt, tx)); | |
929 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
930 | sizeof (cnt), 1, &cnt, tx)); | |
931 | } | |
932 | ||
13fe0198 | 933 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 934 | |
572e2857 BB |
935 | /* |
936 | * If we are creating a clone, make sure we zero out any stale | |
937 | * data from the origin snapshots zil header. | |
938 | */ | |
13fe0198 | 939 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 940 | dsl_dataset_t *ds; |
572e2857 | 941 | |
13fe0198 MA |
942 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
943 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
944 | dsl_dataset_rele(ds, FTAG); |
945 | } | |
946 | ||
34dc7c2f BB |
947 | return (dsobj); |
948 | } | |
949 | ||
34dc7c2f | 950 | /* |
13fe0198 MA |
951 | * The unique space in the head dataset can be calculated by subtracting |
952 | * the space used in the most recent snapshot, that is still being used | |
953 | * in this file system, from the space currently in use. To figure out | |
954 | * the space in the most recent snapshot still in use, we need to take | |
955 | * the total space used in the snapshot and subtract out the space that | |
956 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 957 | */ |
13fe0198 MA |
958 | void |
959 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 960 | { |
13fe0198 MA |
961 | uint64_t mrs_used; |
962 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 963 | |
0c66c32d | 964 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 965 | |
d683ddbb JG |
966 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
967 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
968 | else |
969 | mrs_used = 0; | |
45d1cae3 | 970 | |
13fe0198 | 971 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 972 | |
13fe0198 | 973 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
974 | dsl_dataset_phys(ds)->ds_unique_bytes = |
975 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 976 | |
13fe0198 MA |
977 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
978 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 979 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
980 | } |
981 | ||
13fe0198 MA |
982 | void |
983 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
984 | dmu_tx_t *tx) | |
45d1cae3 | 985 | { |
13fe0198 MA |
986 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
987 | int err; | |
988 | ASSERTV(uint64_t count); | |
989 | ||
d683ddbb JG |
990 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
991 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
992 | obj, tx); | |
13fe0198 MA |
993 | /* |
994 | * The err should not be ENOENT, but a bug in a previous version | |
995 | * of the code could cause upgrade_clones_cb() to not set | |
996 | * ds_next_snap_obj when it should, leading to a missing entry. | |
997 | * If we knew that the pool was created after | |
998 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
999 | * ENOENT. However, at least we can check that we don't have | |
1000 | * too many entries in the next_clones_obj even after failing to | |
1001 | * remove this one. | |
1002 | */ | |
1003 | if (err != ENOENT) | |
1004 | VERIFY0(err); | |
d683ddbb | 1005 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 1006 | &count)); |
d683ddbb | 1007 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 1008 | } |
45d1cae3 | 1009 | |
45d1cae3 | 1010 | |
13fe0198 MA |
1011 | blkptr_t * |
1012 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1013 | { | |
d683ddbb | 1014 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
1015 | } |
1016 | ||
13fe0198 MA |
1017 | void |
1018 | dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
45d1cae3 | 1019 | { |
13fe0198 MA |
1020 | ASSERT(dmu_tx_is_syncing(tx)); |
1021 | /* If it's the meta-objset, set dp_meta_rootbp */ | |
1022 | if (ds == NULL) { | |
1023 | tx->tx_pool->dp_meta_rootbp = *bp; | |
1024 | } else { | |
1025 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1026 | dsl_dataset_phys(ds)->ds_bp = *bp; |
45d1cae3 | 1027 | } |
13fe0198 | 1028 | } |
45d1cae3 | 1029 | |
13fe0198 MA |
1030 | spa_t * |
1031 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1032 | { | |
1033 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
1034 | } |
1035 | ||
13fe0198 MA |
1036 | void |
1037 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 1038 | { |
13fe0198 | 1039 | dsl_pool_t *dp; |
45d1cae3 | 1040 | |
13fe0198 MA |
1041 | if (ds == NULL) /* this is the meta-objset */ |
1042 | return; | |
34dc7c2f | 1043 | |
428870ff | 1044 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1045 | |
d683ddbb | 1046 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1047 | panic("dirtying snapshot!"); |
1048 | ||
1049 | dp = ds->ds_dir->dd_pool; | |
1050 | ||
13fe0198 | 1051 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
34dc7c2f BB |
1052 | /* up the hold count until we can be written out */ |
1053 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1054 | } | |
1055 | } | |
1056 | ||
04434775 MA |
1057 | boolean_t |
1058 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
1059 | { | |
1060 | int t; | |
1061 | ||
1062 | for (t = 0; t < TXG_SIZE; t++) { | |
1063 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1064 | ds, t)) | |
1065 | return (B_TRUE); | |
1066 | } | |
1067 | return (B_FALSE); | |
1068 | } | |
1069 | ||
34dc7c2f | 1070 | static int |
13fe0198 | 1071 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1072 | { |
13fe0198 | 1073 | uint64_t asize; |
34dc7c2f | 1074 | |
13fe0198 | 1075 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1076 | return (0); |
1077 | ||
34dc7c2f | 1078 | /* |
13fe0198 MA |
1079 | * If there's an fs-only reservation, any blocks that might become |
1080 | * owned by the snapshot dataset must be accommodated by space | |
1081 | * outside of the reservation. | |
34dc7c2f | 1082 | */ |
13fe0198 | 1083 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1084 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1085 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1086 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1087 | |
1088 | /* | |
13fe0198 MA |
1089 | * Propagate any reserved space for this snapshot to other |
1090 | * snapshot checks in this sync group. | |
34dc7c2f | 1091 | */ |
13fe0198 MA |
1092 | if (asize > 0) |
1093 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1094 | |
1095 | return (0); | |
1096 | } | |
1097 | ||
13fe0198 MA |
1098 | typedef struct dsl_dataset_snapshot_arg { |
1099 | nvlist_t *ddsa_snaps; | |
1100 | nvlist_t *ddsa_props; | |
1101 | nvlist_t *ddsa_errors; | |
788eb90c | 1102 | cred_t *ddsa_cr; |
13fe0198 | 1103 | } dsl_dataset_snapshot_arg_t; |
45d1cae3 | 1104 | |
34dc7c2f | 1105 | int |
13fe0198 | 1106 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1107 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1108 | { |
13fe0198 MA |
1109 | int error; |
1110 | uint64_t value; | |
34dc7c2f | 1111 | |
13fe0198 | 1112 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1113 | |
13fe0198 | 1114 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1115 | return (0); |
34dc7c2f BB |
1116 | |
1117 | /* | |
13fe0198 MA |
1118 | * We don't allow multiple snapshots of the same txg. If there |
1119 | * is already one, try again. | |
34dc7c2f | 1120 | */ |
d683ddbb | 1121 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1122 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1123 | |
1124 | /* | |
13fe0198 | 1125 | * Check for conflicting snapshot name. |
34dc7c2f | 1126 | */ |
13fe0198 MA |
1127 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1128 | if (error == 0) | |
2e528b49 | 1129 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1130 | if (error != ENOENT) |
1131 | return (error); | |
45d1cae3 | 1132 | |
96c2e961 KW |
1133 | /* |
1134 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1135 | * those into which we are currently receiving. However, if we are | |
1136 | * creating this snapshot as part of a receive, this check will be | |
1137 | * executed atomically with respect to the completion of the receive | |
1138 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1139 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1140 | * dmu_recv_end_sync(). | |
1141 | */ | |
1142 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1143 | return (SET_ERROR(EBUSY)); | |
1144 | ||
788eb90c JJ |
1145 | /* |
1146 | * Skip the check for temporary snapshots or if we have already checked | |
1147 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1148 | * check the count here when we're receiving a stream. | |
1149 | */ | |
1150 | if (cnt != 0 && cr != NULL) { | |
1151 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1152 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1153 | if (error != 0) | |
1154 | return (error); | |
1155 | } | |
1156 | ||
13fe0198 MA |
1157 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1158 | if (error != 0) | |
1159 | return (error); | |
45d1cae3 | 1160 | |
34dc7c2f BB |
1161 | return (0); |
1162 | } | |
1163 | ||
13fe0198 MA |
1164 | static int |
1165 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
b128c09f | 1166 | { |
13fe0198 MA |
1167 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1168 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1169 | nvpair_t *pair; | |
1170 | int rv = 0; | |
b128c09f | 1171 | |
788eb90c JJ |
1172 | /* |
1173 | * Pre-compute how many total new snapshots will be created for each | |
1174 | * level in the tree and below. This is needed for validating the | |
1175 | * snapshot limit when either taking a recursive snapshot or when | |
1176 | * taking multiple snapshots. | |
1177 | * | |
1178 | * The problem is that the counts are not actually adjusted when | |
1179 | * we are checking, only when we finally sync. For a single snapshot, | |
1180 | * this is easy, the count will increase by 1 at each node up the tree, | |
1181 | * but its more complicated for the recursive/multiple snapshot case. | |
1182 | * | |
1183 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1184 | * at each level up the tree but since it is validating each snapshot | |
1185 | * independently we need to be sure that we are validating the complete | |
1186 | * count for the entire set of snapshots. We do this by rolling up the | |
1187 | * counts for each component of the name into an nvlist and then | |
1188 | * checking each of those cases with the aggregated count. | |
1189 | * | |
1190 | * This approach properly handles not only the recursive snapshot | |
1191 | * case (where we get all of those on the ddsa_snaps list) but also | |
1192 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1193 | * validate the limit on 'a' using a count of 2). | |
1194 | * | |
1195 | * We validate the snapshot names in the third loop and only report | |
1196 | * name errors once. | |
1197 | */ | |
1198 | if (dmu_tx_is_syncing(tx)) { | |
1199 | char *nm; | |
1200 | nvlist_t *cnt_track = NULL; | |
1201 | cnt_track = fnvlist_alloc(); | |
1202 | ||
1203 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1204 | ||
1205 | /* Rollup aggregated counts into the cnt_track list */ | |
1206 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1207 | pair != NULL; | |
1208 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1209 | char *pdelim; | |
1210 | uint64_t val; | |
1211 | ||
1212 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1213 | pdelim = strchr(nm, '@'); | |
1214 | if (pdelim == NULL) | |
1215 | continue; | |
1216 | *pdelim = '\0'; | |
1217 | ||
1218 | do { | |
1219 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1220 | &val) == 0) { | |
1221 | /* update existing entry */ | |
1222 | fnvlist_add_uint64(cnt_track, nm, | |
1223 | val + 1); | |
1224 | } else { | |
1225 | /* add to list */ | |
1226 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1227 | } | |
1228 | ||
1229 | pdelim = strrchr(nm, '/'); | |
1230 | if (pdelim != NULL) | |
1231 | *pdelim = '\0'; | |
1232 | } while (pdelim != NULL); | |
1233 | } | |
1234 | ||
1235 | kmem_free(nm, MAXPATHLEN); | |
1236 | ||
1237 | /* Check aggregated counts at each level */ | |
1238 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1239 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1240 | int error = 0; | |
1241 | char *name; | |
1242 | uint64_t cnt = 0; | |
1243 | dsl_dataset_t *ds; | |
1244 | ||
1245 | name = nvpair_name(pair); | |
1246 | cnt = fnvpair_value_uint64(pair); | |
1247 | ASSERT(cnt > 0); | |
1248 | ||
1249 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1250 | if (error == 0) { | |
1251 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1252 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1253 | ddsa->ddsa_cr); | |
1254 | dsl_dataset_rele(ds, FTAG); | |
1255 | } | |
1256 | ||
1257 | if (error != 0) { | |
1258 | if (ddsa->ddsa_errors != NULL) | |
1259 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1260 | name, error); | |
1261 | rv = error; | |
1262 | /* only report one error for this check */ | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | nvlist_free(cnt_track); | |
1267 | } | |
1268 | ||
13fe0198 MA |
1269 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1270 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1271 | int error = 0; | |
1272 | dsl_dataset_t *ds; | |
689f093e | 1273 | char *name, *atp = NULL; |
eca7b760 | 1274 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1275 | |
1276 | name = nvpair_name(pair); | |
eca7b760 | 1277 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 1278 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1279 | if (error == 0) { |
1280 | atp = strchr(name, '@'); | |
1281 | if (atp == NULL) | |
2e528b49 | 1282 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1283 | if (error == 0) |
1284 | (void) strlcpy(dsname, name, atp - name + 1); | |
1285 | } | |
1286 | if (error == 0) | |
1287 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1288 | if (error == 0) { | |
788eb90c | 1289 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1290 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1291 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1292 | dsl_dataset_rele(ds, FTAG); |
1293 | } | |
b128c09f | 1294 | |
13fe0198 MA |
1295 | if (error != 0) { |
1296 | if (ddsa->ddsa_errors != NULL) { | |
1297 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1298 | name, error); | |
1299 | } | |
1300 | rv = error; | |
1301 | } | |
1302 | } | |
788eb90c | 1303 | |
13fe0198 | 1304 | return (rv); |
b128c09f BB |
1305 | } |
1306 | ||
13fe0198 MA |
1307 | void |
1308 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1309 | dmu_tx_t *tx) | |
428870ff | 1310 | { |
13fe0198 MA |
1311 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1312 | dmu_buf_t *dbuf; | |
1313 | dsl_dataset_phys_t *dsphys; | |
1314 | uint64_t dsobj, crtxg; | |
1315 | objset_t *mos = dp->dp_meta_objset; | |
241b5415 | 1316 | spa_feature_t f; |
13fe0198 MA |
1317 | ASSERTV(static zil_header_t zero_zil); |
1318 | ASSERTV(objset_t *os); | |
1319 | ||
1320 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1321 | |
428870ff | 1322 | /* |
13fe0198 MA |
1323 | * If we are on an old pool, the zil must not be active, in which |
1324 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1325 | */ |
13fe0198 MA |
1326 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1327 | dmu_objset_from_ds(ds, &os) != 0 || | |
1328 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1329 | sizeof (zero_zil)) == 0); | |
428870ff | 1330 | |
788eb90c | 1331 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1332 | |
1333 | /* | |
13fe0198 | 1334 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1335 | */ |
1336 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1337 | crtxg = 1; | |
1338 | else | |
1339 | crtxg = tx->tx_txg; | |
1340 | ||
34dc7c2f BB |
1341 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1342 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1343 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1344 | dmu_buf_will_dirty(dbuf, tx); |
1345 | dsphys = dbuf->db_data; | |
b128c09f | 1346 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1347 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1348 | dsphys->ds_fsid_guid = unique_create(); | |
1349 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1350 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1351 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1352 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1353 | dsphys->ds_next_snap_obj = ds->ds_object; |
1354 | dsphys->ds_num_children = 1; | |
1355 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1356 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1357 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1358 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1359 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1360 | dsphys->ds_uncompressed_bytes = | |
1361 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1362 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
1363 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; | |
34dc7c2f BB |
1364 | dmu_buf_rele(dbuf, FTAG); |
1365 | ||
241b5415 MA |
1366 | for (f = 0; f < SPA_FEATURES; f++) { |
1367 | if (ds->ds_feature_inuse[f]) | |
1368 | dsl_dataset_activate_feature(dsobj, f, tx); | |
1369 | } | |
f1512ee6 | 1370 | |
d683ddbb JG |
1371 | ASSERT3U(ds->ds_prev != 0, ==, |
1372 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1373 | if (ds->ds_prev) { |
b128c09f | 1374 | uint64_t next_clones_obj = |
d683ddbb JG |
1375 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1376 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1377 | ds->ds_object || |
d683ddbb JG |
1378 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1379 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1380 | ds->ds_object) { | |
34dc7c2f | 1381 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1382 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1383 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1384 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1385 | } else if (next_clones_obj != 0) { |
13fe0198 | 1386 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1387 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1388 | VERIFY0(zap_add_int(mos, |
b128c09f | 1389 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1390 | } |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * If we have a reference-reservation on this dataset, we will | |
1395 | * need to increase the amount of refreservation being charged | |
1396 | * since our unique space is going to zero. | |
1397 | */ | |
1398 | if (ds->ds_reserved) { | |
428870ff BB |
1399 | int64_t delta; |
1400 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1401 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1402 | ds->ds_reserved); | |
b128c09f | 1403 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1404 | delta, 0, 0, tx); |
34dc7c2f BB |
1405 | } |
1406 | ||
34dc7c2f | 1407 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1408 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1409 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1410 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1411 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1412 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1413 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1414 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1415 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1416 | |
d683ddbb JG |
1417 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1418 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1419 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1420 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
34dc7c2f | 1421 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1422 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1423 | |
d683ddbb | 1424 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1425 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1426 | |
1427 | if (ds->ds_prev) | |
13fe0198 MA |
1428 | dsl_dataset_rele(ds->ds_prev, ds); |
1429 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1430 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1431 | |
428870ff BB |
1432 | dsl_scan_ds_snapshotted(ds, tx); |
1433 | ||
1434 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1435 | |
6f1ffb06 | 1436 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1437 | } |
1438 | ||
13fe0198 MA |
1439 | static void |
1440 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1441 | { |
13fe0198 MA |
1442 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1443 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1444 | nvpair_t *pair; | |
34dc7c2f | 1445 | |
13fe0198 MA |
1446 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1447 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1448 | dsl_dataset_t *ds; | |
1449 | char *name, *atp; | |
eca7b760 | 1450 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1451 | |
1452 | name = nvpair_name(pair); | |
1453 | atp = strchr(name, '@'); | |
1454 | (void) strlcpy(dsname, name, atp - name + 1); | |
1455 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1456 | ||
1457 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1458 | if (ddsa->ddsa_props != NULL) { | |
1459 | dsl_props_set_sync_impl(ds->ds_prev, | |
1460 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1461 | } | |
a0bd735a | 1462 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
1463 | dsl_dataset_rele(ds, FTAG); |
1464 | } | |
34dc7c2f BB |
1465 | } |
1466 | ||
13fe0198 MA |
1467 | /* |
1468 | * The snapshots must all be in the same pool. | |
1469 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1470 | */ | |
1471 | int | |
1472 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1473 | { |
13fe0198 MA |
1474 | dsl_dataset_snapshot_arg_t ddsa; |
1475 | nvpair_t *pair; | |
1476 | boolean_t needsuspend; | |
1477 | int error; | |
1478 | spa_t *spa; | |
1479 | char *firstname; | |
1480 | nvlist_t *suspended = NULL; | |
330d06f9 | 1481 | |
13fe0198 MA |
1482 | pair = nvlist_next_nvpair(snaps, NULL); |
1483 | if (pair == NULL) | |
1484 | return (0); | |
1485 | firstname = nvpair_name(pair); | |
1486 | ||
1487 | error = spa_open(firstname, &spa, FTAG); | |
1488 | if (error != 0) | |
1489 | return (error); | |
1490 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1491 | spa_close(spa, FTAG); | |
1492 | ||
1493 | if (needsuspend) { | |
1494 | suspended = fnvlist_alloc(); | |
1495 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1496 | pair = nvlist_next_nvpair(snaps, pair)) { | |
eca7b760 | 1497 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1498 | char *snapname = nvpair_name(pair); |
1499 | char *atp; | |
1500 | void *cookie; | |
1501 | ||
1502 | atp = strchr(snapname, '@'); | |
1503 | if (atp == NULL) { | |
2e528b49 | 1504 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1505 | break; |
1506 | } | |
1507 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1508 | ||
1509 | error = zil_suspend(fsname, &cookie); | |
1510 | if (error != 0) | |
1511 | break; | |
1512 | fnvlist_add_uint64(suspended, fsname, | |
1513 | (uintptr_t)cookie); | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | ddsa.ddsa_snaps = snaps; | |
1518 | ddsa.ddsa_props = props; | |
1519 | ddsa.ddsa_errors = errors; | |
788eb90c | 1520 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1521 | |
1522 | if (error == 0) { | |
1523 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1524 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1525 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1526 | } |
1527 | ||
1528 | if (suspended != NULL) { | |
1529 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1530 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1531 | zil_resume((void *)(uintptr_t) | |
1532 | fnvpair_value_uint64(pair)); | |
1533 | } | |
1534 | fnvlist_free(suspended); | |
1535 | } | |
1536 | ||
1537 | return (error); | |
1538 | } | |
1539 | ||
1540 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1541 | const char *ddsta_fsname; | |
1542 | const char *ddsta_snapname; | |
1543 | minor_t ddsta_cleanup_minor; | |
1544 | const char *ddsta_htag; | |
1545 | } dsl_dataset_snapshot_tmp_arg_t; | |
1546 | ||
1547 | static int | |
1548 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1549 | { | |
1550 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1551 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1552 | dsl_dataset_t *ds; | |
1553 | int error; | |
1554 | ||
1555 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1556 | if (error != 0) | |
1557 | return (error); | |
1558 | ||
788eb90c | 1559 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1560 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1561 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1562 | if (error != 0) { |
1563 | dsl_dataset_rele(ds, FTAG); | |
1564 | return (error); | |
1565 | } | |
1566 | ||
1567 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1568 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1569 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1570 | } |
1571 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1572 | B_TRUE, tx); | |
1573 | if (error != 0) { | |
1574 | dsl_dataset_rele(ds, FTAG); | |
1575 | return (error); | |
1576 | } | |
1577 | ||
1578 | dsl_dataset_rele(ds, FTAG); | |
1579 | return (0); | |
1580 | } | |
1581 | ||
1582 | static void | |
1583 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1584 | { | |
1585 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1586 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 1587 | dsl_dataset_t *ds = NULL; |
13fe0198 MA |
1588 | |
1589 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1590 | ||
1591 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1592 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1593 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1594 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1595 | ||
1596 | dsl_dataset_rele(ds, FTAG); | |
1597 | } | |
1598 | ||
1599 | int | |
1600 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1601 | minor_t cleanup_minor, const char *htag) | |
1602 | { | |
1603 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1604 | int error; | |
1605 | spa_t *spa; | |
1606 | boolean_t needsuspend; | |
1607 | void *cookie; | |
1608 | ||
1609 | ddsta.ddsta_fsname = fsname; | |
1610 | ddsta.ddsta_snapname = snapname; | |
1611 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1612 | ddsta.ddsta_htag = htag; | |
1613 | ||
1614 | error = spa_open(fsname, &spa, FTAG); | |
1615 | if (error != 0) | |
1616 | return (error); | |
1617 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1618 | spa_close(spa, FTAG); | |
1619 | ||
1620 | if (needsuspend) { | |
1621 | error = zil_suspend(fsname, &cookie); | |
1622 | if (error != 0) | |
1623 | return (error); | |
1624 | } | |
1625 | ||
1626 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1627 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1628 | |
1629 | if (needsuspend) | |
1630 | zil_resume(cookie); | |
1631 | return (error); | |
1632 | } | |
1633 | ||
1634 | ||
1635 | void | |
1636 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1637 | { | |
241b5415 MA |
1638 | spa_feature_t f; |
1639 | ||
13fe0198 MA |
1640 | ASSERT(dmu_tx_is_syncing(tx)); |
1641 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1642 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1643 | |
1644 | /* | |
1645 | * in case we had to change ds_fsid_guid when we opened it, | |
1646 | * sync it out now. | |
1647 | */ | |
1648 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1649 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 | 1650 | |
47dfff3b MA |
1651 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
1652 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1653 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
1654 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
1655 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1656 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
1657 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
1658 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1659 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
1660 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
1661 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
1662 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
1663 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
1664 | } | |
1665 | ||
13fe0198 | 1666 | dmu_objset_sync(ds->ds_objset, zio, tx); |
f1512ee6 | 1667 | |
241b5415 MA |
1668 | for (f = 0; f < SPA_FEATURES; f++) { |
1669 | if (ds->ds_feature_activation_needed[f]) { | |
1670 | if (ds->ds_feature_inuse[f]) | |
1671 | continue; | |
1672 | dsl_dataset_activate_feature(ds->ds_object, f, tx); | |
1673 | ds->ds_feature_inuse[f] = B_TRUE; | |
1674 | } | |
f1512ee6 | 1675 | } |
13fe0198 MA |
1676 | } |
1677 | ||
1678 | static void | |
1679 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1680 | { | |
1681 | uint64_t count = 0; | |
1682 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1683 | zap_cursor_t zc; | |
1684 | zap_attribute_t za; | |
1685 | nvlist_t *propval = fnvlist_alloc(); | |
1686 | nvlist_t *val = fnvlist_alloc(); | |
1687 | ||
1688 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
1689 | |
1690 | /* | |
13fe0198 | 1691 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
1692 | * due to a bug in a previous version of the code. |
1693 | * Only trust it if it has the right number of entries. | |
1694 | */ | |
d683ddbb JG |
1695 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
1696 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
1697 | &count)); |
1698 | } | |
d683ddbb | 1699 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) |
330d06f9 | 1700 | goto fail; |
d683ddbb JG |
1701 | for (zap_cursor_init(&zc, mos, |
1702 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
1703 | zap_cursor_retrieve(&zc, &za) == 0; |
1704 | zap_cursor_advance(&zc)) { | |
1705 | dsl_dataset_t *clone; | |
eca7b760 | 1706 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1707 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1708 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 1709 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 1710 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
1711 | dsl_dataset_rele(clone, FTAG); |
1712 | } | |
1713 | zap_cursor_fini(&zc); | |
13fe0198 MA |
1714 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); |
1715 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
330d06f9 MA |
1716 | fail: |
1717 | nvlist_free(val); | |
1718 | nvlist_free(propval); | |
330d06f9 MA |
1719 | } |
1720 | ||
47dfff3b MA |
1721 | static void |
1722 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1723 | { | |
1724 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1725 | ||
1726 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
1727 | char *str; | |
1728 | void *packed; | |
1729 | uint8_t *compressed; | |
1730 | uint64_t val; | |
1731 | nvlist_t *token_nv = fnvlist_alloc(); | |
1732 | size_t packed_size, compressed_size; | |
1733 | zio_cksum_t cksum; | |
1734 | char *propval; | |
1735 | char buf[MAXNAMELEN]; | |
1736 | int i; | |
1737 | ||
1738 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1739 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
1740 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
1741 | } | |
1742 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1743 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
1744 | fnvlist_add_uint64(token_nv, "object", val); | |
1745 | } | |
1746 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1747 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
1748 | fnvlist_add_uint64(token_nv, "offset", val); | |
1749 | } | |
1750 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1751 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
1752 | fnvlist_add_uint64(token_nv, "bytes", val); | |
1753 | } | |
1754 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1755 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
1756 | fnvlist_add_uint64(token_nv, "toguid", val); | |
1757 | } | |
1758 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1759 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
1760 | fnvlist_add_string(token_nv, "toname", buf); | |
1761 | } | |
1762 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, | |
1763 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
1764 | fnvlist_add_boolean(token_nv, "embedok"); | |
1765 | } | |
1766 | packed = fnvlist_pack(token_nv, &packed_size); | |
1767 | fnvlist_free(token_nv); | |
1768 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
1769 | ||
1770 | compressed_size = gzip_compress(packed, compressed, | |
1771 | packed_size, packed_size, 6); | |
1772 | ||
1773 | fletcher_4_native(compressed, compressed_size, &cksum); | |
1774 | ||
1775 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1776 | for (i = 0; i < compressed_size; i++) { | |
1777 | (void) sprintf(str + i * 2, "%02x", compressed[i]); | |
1778 | } | |
1779 | str[compressed_size * 2] = '\0'; | |
1780 | propval = kmem_asprintf("%u-%llx-%llx-%s", | |
1781 | ZFS_SEND_RESUME_TOKEN_VERSION, | |
1782 | (longlong_t)cksum.zc_word[0], | |
1783 | (longlong_t)packed_size, str); | |
1784 | dsl_prop_nvlist_add_string(nv, | |
1785 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
1786 | kmem_free(packed, packed_size); | |
1787 | kmem_free(str, compressed_size * 2 + 1); | |
1788 | kmem_free(compressed, packed_size); | |
1789 | strfree(propval); | |
1790 | } | |
1791 | } | |
1792 | ||
34dc7c2f BB |
1793 | void |
1794 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1795 | { | |
b858767a | 1796 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
f5fc4aca | 1797 | uint64_t refd, avail, uobjs, aobjs, ratio; |
13fe0198 MA |
1798 | |
1799 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 1800 | |
d683ddbb JG |
1801 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : |
1802 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1803 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
6f1ffb06 MA |
1804 | |
1805 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
24a64651 | 1806 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d683ddbb | 1807 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); |
6f1ffb06 | 1808 | |
0c66c32d | 1809 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
1810 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); |
1811 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
d683ddbb | 1812 | dsl_dataset_phys(ds)->ds_unique_bytes); |
6f1ffb06 MA |
1813 | get_clones_stat(ds, nv); |
1814 | } else { | |
1715493f | 1815 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { |
eca7b760 | 1816 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
1715493f MA |
1817 | dsl_dataset_name(ds->ds_prev, buf); |
1818 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); | |
1819 | } | |
1820 | ||
6f1ffb06 MA |
1821 | dsl_dir_stats(ds->ds_dir, nv); |
1822 | } | |
34dc7c2f BB |
1823 | |
1824 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1825 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1826 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1827 | ||
1828 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
d683ddbb | 1829 | dsl_dataset_phys(ds)->ds_creation_time); |
34dc7c2f | 1830 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d683ddbb | 1831 | dsl_dataset_phys(ds)->ds_creation_txg); |
34dc7c2f BB |
1832 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
1833 | ds->ds_quota); | |
1834 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1835 | ds->ds_reserved); | |
b128c09f | 1836 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d683ddbb | 1837 | dsl_dataset_phys(ds)->ds_guid); |
428870ff | 1838 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d683ddbb | 1839 | dsl_dataset_phys(ds)->ds_unique_bytes); |
428870ff BB |
1840 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
1841 | ds->ds_object); | |
1842 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1843 | ds->ds_userrefs); | |
45d1cae3 BB |
1844 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
1845 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
34dc7c2f | 1846 | |
d683ddbb | 1847 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
330d06f9 MA |
1848 | uint64_t written, comp, uncomp; |
1849 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1850 | dsl_dataset_t *prev; | |
1851 | int err; | |
1852 | ||
330d06f9 | 1853 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 1854 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); |
330d06f9 MA |
1855 | if (err == 0) { |
1856 | err = dsl_dataset_space_written(prev, ds, &written, | |
1857 | &comp, &uncomp); | |
1858 | dsl_dataset_rele(prev, FTAG); | |
1859 | if (err == 0) { | |
1860 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1861 | written); | |
1862 | } | |
1863 | } | |
1864 | } | |
1865 | ||
47dfff3b | 1866 | if (!dsl_dataset_is_snapshot(ds)) { |
eca7b760 IK |
1867 | /* 6 extra bytes for /%recv */ |
1868 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
47dfff3b | 1869 | dsl_dataset_t *recv_ds; |
47dfff3b MA |
1870 | |
1871 | /* | |
1872 | * A failed "newfs" (e.g. full) resumable receive leaves | |
1873 | * the stats set on this dataset. Check here for the prop. | |
1874 | */ | |
1875 | get_receive_resume_stats(ds, nv); | |
1876 | ||
1877 | /* | |
1878 | * A failed incremental resumable receive leaves the | |
1879 | * stats set on our child named "%recv". Check the child | |
1880 | * for the prop. | |
1881 | */ | |
1882 | dsl_dataset_name(ds, recvname); | |
eca7b760 IK |
1883 | if (strlcat(recvname, "/", sizeof (recvname)) < |
1884 | sizeof (recvname) && | |
1885 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
1886 | sizeof (recvname) && | |
1887 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
47dfff3b MA |
1888 | get_receive_resume_stats(recv_ds, nv); |
1889 | dsl_dataset_rele(recv_ds, FTAG); | |
1890 | } | |
1891 | } | |
34dc7c2f BB |
1892 | } |
1893 | ||
1894 | void | |
1895 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1896 | { | |
13fe0198 MA |
1897 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1898 | ASSERT(dsl_pool_config_held(dp)); | |
1899 | ||
d683ddbb JG |
1900 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; |
1901 | stat->dds_inconsistent = | |
1902 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1903 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
6f1ffb06 | 1904 | stat->dds_origin[0] = '\0'; |
0c66c32d | 1905 | if (ds->ds_is_snapshot) { |
34dc7c2f | 1906 | stat->dds_is_snapshot = B_TRUE; |
d683ddbb JG |
1907 | stat->dds_num_clones = |
1908 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
fb5f0bc8 BB |
1909 | } else { |
1910 | stat->dds_is_snapshot = B_FALSE; | |
1911 | stat->dds_num_clones = 0; | |
34dc7c2f | 1912 | |
6f1ffb06 MA |
1913 | if (dsl_dir_is_clone(ds->ds_dir)) { |
1914 | dsl_dataset_t *ods; | |
34dc7c2f | 1915 | |
13fe0198 | 1916 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1917 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, |
1918 | FTAG, &ods)); | |
6f1ffb06 | 1919 | dsl_dataset_name(ods, stat->dds_origin); |
13fe0198 | 1920 | dsl_dataset_rele(ods, FTAG); |
6f1ffb06 | 1921 | } |
34dc7c2f | 1922 | } |
34dc7c2f BB |
1923 | } |
1924 | ||
1925 | uint64_t | |
1926 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1927 | { | |
1928 | return (ds->ds_fsid_guid); | |
1929 | } | |
1930 | ||
1931 | void | |
1932 | dsl_dataset_space(dsl_dataset_t *ds, | |
1933 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
1934 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
1935 | { | |
d683ddbb | 1936 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 1937 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
1938 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
1939 | *availbytesp += | |
1940 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
1941 | if (ds->ds_quota != 0) { |
1942 | /* | |
1943 | * Adjust available bytes according to refquota | |
1944 | */ | |
1945 | if (*refdbytesp < ds->ds_quota) | |
1946 | *availbytesp = MIN(*availbytesp, | |
1947 | ds->ds_quota - *refdbytesp); | |
1948 | else | |
1949 | *availbytesp = 0; | |
1950 | } | |
d683ddbb | 1951 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
34dc7c2f BB |
1952 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
1953 | } | |
1954 | ||
1955 | boolean_t | |
19580676 | 1956 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 1957 | { |
19580676 MA |
1958 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
1959 | if (snap == NULL) | |
34dc7c2f | 1960 | return (B_FALSE); |
d683ddbb JG |
1961 | if (dsl_dataset_phys(ds)->ds_bp.blk_birth > |
1962 | dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 1963 | objset_t *os, *os_snap; |
572e2857 BB |
1964 | /* |
1965 | * It may be that only the ZIL differs, because it was | |
1966 | * reset in the head. Don't count that as being | |
1967 | * modified. | |
1968 | */ | |
1969 | if (dmu_objset_from_ds(ds, &os) != 0) | |
1970 | return (B_TRUE); | |
19580676 | 1971 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
1972 | return (B_TRUE); |
1973 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 1974 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
1975 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
1976 | } | |
34dc7c2f BB |
1977 | return (B_FALSE); |
1978 | } | |
1979 | ||
13fe0198 MA |
1980 | typedef struct dsl_dataset_rename_snapshot_arg { |
1981 | const char *ddrsa_fsname; | |
1982 | const char *ddrsa_oldsnapname; | |
1983 | const char *ddrsa_newsnapname; | |
1984 | boolean_t ddrsa_recursive; | |
1985 | dmu_tx_t *ddrsa_tx; | |
1986 | } dsl_dataset_rename_snapshot_arg_t; | |
1987 | ||
34dc7c2f BB |
1988 | /* ARGSUSED */ |
1989 | static int | |
13fe0198 MA |
1990 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
1991 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 1992 | { |
13fe0198 MA |
1993 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
1994 | int error; | |
34dc7c2f | 1995 | uint64_t val; |
34dc7c2f | 1996 | |
13fe0198 MA |
1997 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
1998 | if (error != 0) { | |
1999 | /* ignore nonexistent snapshots */ | |
2000 | return (error == ENOENT ? 0 : error); | |
2001 | } | |
34dc7c2f | 2002 | |
13fe0198 MA |
2003 | /* new name should not exist */ |
2004 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2005 | if (error == 0) | |
2e528b49 | 2006 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
2007 | else if (error == ENOENT) |
2008 | error = 0; | |
34dc7c2f BB |
2009 | |
2010 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 | 2011 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
eca7b760 | 2012 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 2013 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 2014 | |
13fe0198 | 2015 | return (error); |
34dc7c2f BB |
2016 | } |
2017 | ||
13fe0198 MA |
2018 | static int |
2019 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2020 | { |
13fe0198 MA |
2021 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2022 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 2023 | dsl_dataset_t *hds; |
13fe0198 | 2024 | int error; |
34dc7c2f | 2025 | |
13fe0198 MA |
2026 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
2027 | if (error != 0) | |
2028 | return (error); | |
34dc7c2f | 2029 | |
13fe0198 MA |
2030 | if (ddrsa->ddrsa_recursive) { |
2031 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2032 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2033 | DS_FIND_CHILDREN); | |
2034 | } else { | |
2035 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2036 | } | |
b128c09f | 2037 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 2038 | return (error); |
34dc7c2f BB |
2039 | } |
2040 | ||
34dc7c2f | 2041 | static int |
13fe0198 MA |
2042 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
2043 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2044 | { |
13fe0198 MA |
2045 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2046 | dsl_dataset_t *ds; | |
2047 | uint64_t val; | |
2048 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2049 | int error; | |
34dc7c2f | 2050 | |
13fe0198 MA |
2051 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2052 | ASSERT(error == 0 || error == ENOENT); | |
2053 | if (error == ENOENT) { | |
2054 | /* ignore nonexistent snapshots */ | |
2055 | return (0); | |
34dc7c2f BB |
2056 | } |
2057 | ||
13fe0198 MA |
2058 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
2059 | ||
2060 | /* log before we change the name */ | |
2061 | spa_history_log_internal_ds(ds, "rename", tx, | |
2062 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 2063 | |
788eb90c JJ |
2064 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
2065 | B_FALSE)); | |
13fe0198 MA |
2066 | mutex_enter(&ds->ds_lock); |
2067 | (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); | |
2068 | mutex_exit(&ds->ds_lock); | |
d683ddbb JG |
2069 | VERIFY0(zap_add(dp->dp_meta_objset, |
2070 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 2071 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
a0bd735a BP |
2072 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, |
2073 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
34dc7c2f | 2074 | |
13fe0198 | 2075 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
2076 | return (0); |
2077 | } | |
2078 | ||
13fe0198 MA |
2079 | static void |
2080 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2081 | { |
13fe0198 MA |
2082 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2083 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 2084 | dsl_dataset_t *hds = NULL; |
34dc7c2f | 2085 | |
13fe0198 MA |
2086 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
2087 | ddrsa->ddrsa_tx = tx; | |
2088 | if (ddrsa->ddrsa_recursive) { | |
2089 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2090 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
2091 | DS_FIND_CHILDREN)); | |
2092 | } else { | |
2093 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 2094 | } |
13fe0198 | 2095 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
2096 | } |
2097 | ||
13fe0198 MA |
2098 | int |
2099 | dsl_dataset_rename_snapshot(const char *fsname, | |
2100 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 2101 | { |
13fe0198 | 2102 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 2103 | |
13fe0198 MA |
2104 | ddrsa.ddrsa_fsname = fsname; |
2105 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
2106 | ddrsa.ddrsa_newsnapname = newsnapname; | |
2107 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 2108 | |
a0bd735a | 2109 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 | 2110 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
a0bd735a | 2111 | 1, ZFS_SPACE_CHECK_RESERVED)); |
34dc7c2f BB |
2112 | } |
2113 | ||
831baf06 KW |
2114 | /* |
2115 | * If we're doing an ownership handoff, we need to make sure that there is | |
2116 | * only one long hold on the dataset. We're not allowed to change anything here | |
2117 | * so we don't permanently release the long hold or regular hold here. We want | |
2118 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
47dfff3b MA |
2119 | * when we release the long hold. Allow a long hold to exist for volumes, this |
2120 | * may occur when asynchronously registering the minor with the kernel. | |
831baf06 KW |
2121 | */ |
2122 | static int | |
2123 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
2124 | { | |
2125 | boolean_t held; | |
2126 | ||
2127 | if (!dmu_tx_is_syncing(tx)) | |
2128 | return (0); | |
2129 | ||
2130 | if (owner != NULL) { | |
2131 | VERIFY3P(ds->ds_owner, ==, owner); | |
2132 | dsl_dataset_long_rele(ds, owner); | |
2133 | } | |
2134 | ||
47dfff3b | 2135 | held = (dsl_dataset_long_held(ds) && (ds->ds_owner != zvol_tag)); |
831baf06 KW |
2136 | |
2137 | if (owner != NULL) | |
2138 | dsl_dataset_long_hold(ds, owner); | |
2139 | ||
2140 | if (held) | |
2141 | return (SET_ERROR(EBUSY)); | |
2142 | ||
2143 | return (0); | |
2144 | } | |
2145 | ||
2146 | typedef struct dsl_dataset_rollback_arg { | |
2147 | const char *ddra_fsname; | |
2148 | void *ddra_owner; | |
46ba1e59 | 2149 | nvlist_t *ddra_result; |
831baf06 KW |
2150 | } dsl_dataset_rollback_arg_t; |
2151 | ||
13fe0198 MA |
2152 | static int |
2153 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2154 | { |
831baf06 | 2155 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 2156 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 2157 | dsl_dataset_t *ds; |
13fe0198 MA |
2158 | int64_t unused_refres_delta; |
2159 | int error; | |
da536844 MA |
2160 | nvpair_t *pair; |
2161 | nvlist_t *proprequest, *bookmarks; | |
34dc7c2f | 2162 | |
831baf06 | 2163 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
2164 | if (error != 0) |
2165 | return (error); | |
428870ff | 2166 | |
13fe0198 | 2167 | /* must not be a snapshot */ |
0c66c32d | 2168 | if (ds->ds_is_snapshot) { |
13fe0198 | 2169 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2170 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2171 | } |
34dc7c2f | 2172 | |
13fe0198 | 2173 | /* must have a most recent snapshot */ |
d683ddbb | 2174 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 2175 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2176 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2177 | } |
34dc7c2f | 2178 | |
da536844 | 2179 | /* must not have any bookmarks after the most recent snapshot */ |
79c76d5b | 2180 | proprequest = fnvlist_alloc(); |
da536844 | 2181 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
79c76d5b | 2182 | bookmarks = fnvlist_alloc(); |
da536844 MA |
2183 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
2184 | fnvlist_free(proprequest); | |
2185 | if (error != 0) | |
2186 | return (error); | |
2187 | for (pair = nvlist_next_nvpair(bookmarks, NULL); | |
2188 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { | |
2189 | nvlist_t *valuenv = | |
2190 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2191 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2192 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2193 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2194 | fnvlist_free(bookmarks); |
2195 | dsl_dataset_rele(ds, FTAG); | |
2196 | return (SET_ERROR(EEXIST)); | |
2197 | } | |
2198 | } | |
2199 | fnvlist_free(bookmarks); | |
2200 | ||
831baf06 KW |
2201 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2202 | if (error != 0) { | |
13fe0198 | 2203 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2204 | return (error); |
34dc7c2f | 2205 | } |
428870ff | 2206 | |
13fe0198 MA |
2207 | /* |
2208 | * Check if the snap we are rolling back to uses more than | |
2209 | * the refquota. | |
2210 | */ | |
2211 | if (ds->ds_quota != 0 && | |
d683ddbb | 2212 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2213 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2214 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2215 | } |
2216 | ||
13fe0198 MA |
2217 | /* |
2218 | * When we do the clone swap, we will temporarily use more space | |
2219 | * due to the refreservation (the head will no longer have any | |
2220 | * unique space, so the entire amount of the refreservation will need | |
2221 | * to be free). We will immediately destroy the clone, freeing | |
2222 | * this space, but the freeing happens over many txg's. | |
2223 | */ | |
2224 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2225 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2226 | |
13fe0198 MA |
2227 | if (unused_refres_delta > 0 && |
2228 | unused_refres_delta > | |
2229 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2230 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2231 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2232 | } |
34dc7c2f | 2233 | |
13fe0198 MA |
2234 | dsl_dataset_rele(ds, FTAG); |
2235 | return (0); | |
2236 | } | |
34dc7c2f | 2237 | |
13fe0198 MA |
2238 | static void |
2239 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2240 | { | |
831baf06 | 2241 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2242 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2243 | dsl_dataset_t *ds, *clone; | |
2244 | uint64_t cloneobj; | |
eca7b760 | 2245 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 2246 | |
831baf06 | 2247 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2248 | |
46ba1e59 MA |
2249 | dsl_dataset_name(ds->ds_prev, namebuf); |
2250 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2251 | ||
13fe0198 MA |
2252 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
2253 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); | |
2254 | ||
2255 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2256 | ||
2257 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2258 | dsl_dataset_zero_zil(ds, tx); | |
2259 | ||
2260 | dsl_destroy_head_sync_impl(clone, tx); | |
2261 | ||
2262 | dsl_dataset_rele(clone, FTAG); | |
2263 | dsl_dataset_rele(ds, FTAG); | |
2264 | } | |
2265 | ||
831baf06 | 2266 | /* |
46ba1e59 MA |
2267 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2268 | * The name of the most recent snapshot will be returned under key "target" | |
2269 | * in the result nvlist. | |
831baf06 | 2270 | * |
46ba1e59 | 2271 | * If owner != NULL: |
831baf06 KW |
2272 | * - The existing dataset MUST be owned by the specified owner at entry |
2273 | * - Upon return, dataset will still be held by the same owner, whether we | |
2274 | * succeed or not. | |
2275 | * | |
2276 | * This mode is required any time the existing filesystem is mounted. See | |
2277 | * notes above zfs_suspend_fs() for further details. | |
2278 | */ | |
13fe0198 | 2279 | int |
46ba1e59 | 2280 | dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) |
13fe0198 | 2281 | { |
831baf06 KW |
2282 | dsl_dataset_rollback_arg_t ddra; |
2283 | ||
2284 | ddra.ddra_fsname = fsname; | |
2285 | ddra.ddra_owner = owner; | |
46ba1e59 | 2286 | ddra.ddra_result = result; |
831baf06 | 2287 | |
13fe0198 | 2288 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
2289 | dsl_dataset_rollback_sync, &ddra, |
2290 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2291 | } |
2292 | ||
b128c09f BB |
2293 | struct promotenode { |
2294 | list_node_t link; | |
2295 | dsl_dataset_t *ds; | |
2296 | }; | |
2297 | ||
13fe0198 MA |
2298 | typedef struct dsl_dataset_promote_arg { |
2299 | const char *ddpa_clonename; | |
2300 | dsl_dataset_t *ddpa_clone; | |
b128c09f | 2301 | list_t shared_snaps, origin_snaps, clone_snaps; |
13fe0198 | 2302 | dsl_dataset_t *origin_origin; /* origin of the origin */ |
b128c09f | 2303 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; |
428870ff | 2304 | char *err_ds; |
788eb90c | 2305 | cred_t *cr; |
13fe0198 | 2306 | } dsl_dataset_promote_arg_t; |
34dc7c2f | 2307 | |
b128c09f | 2308 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
2309 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
2310 | void *tag); | |
2311 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 2312 | |
34dc7c2f | 2313 | static int |
13fe0198 | 2314 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2315 | { |
13fe0198 MA |
2316 | dsl_dataset_promote_arg_t *ddpa = arg; |
2317 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2318 | dsl_dataset_t *hds; | |
2319 | struct promotenode *snap; | |
2320 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 2321 | int err; |
428870ff | 2322 | uint64_t unused; |
788eb90c | 2323 | uint64_t ss_mv_cnt; |
fec41709 | 2324 | size_t max_snap_len; |
34dc7c2f | 2325 | |
13fe0198 MA |
2326 | err = promote_hold(ddpa, dp, FTAG); |
2327 | if (err != 0) | |
2328 | return (err); | |
34dc7c2f | 2329 | |
13fe0198 | 2330 | hds = ddpa->ddpa_clone; |
fec41709 | 2331 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 2332 | |
d683ddbb | 2333 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 2334 | promote_rele(ddpa, FTAG); |
2e528b49 | 2335 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
2336 | } |
2337 | ||
2338 | /* | |
2339 | * Compute and check the amount of space to transfer. Since this is | |
2340 | * so expensive, don't do the preliminary check. | |
2341 | */ | |
2342 | if (!dmu_tx_is_syncing(tx)) { | |
2343 | promote_rele(ddpa, FTAG); | |
2344 | return (0); | |
2345 | } | |
2346 | ||
2347 | snap = list_head(&ddpa->shared_snaps); | |
2348 | origin_ds = snap->ds; | |
34dc7c2f BB |
2349 | |
2350 | /* compute origin's new unique space */ | |
13fe0198 | 2351 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2352 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2353 | origin_ds->ds_object); | |
428870ff | 2354 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 2355 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 2356 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 2357 | |
b128c09f BB |
2358 | /* |
2359 | * Walk the snapshots that we are moving | |
2360 | * | |
2361 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 2362 | * to used by each snapshot: |
b128c09f BB |
2363 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
2364 | * So each snapshot gave birth to: | |
2365 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2366 | * So a sequence would look like: | |
2367 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2368 | * Which simplifies to: | |
2369 | * uN + kN + kN-1 + ... + k1 + k0 | |
2370 | * Note however, if we stop before we reach the ORIGIN we get: | |
2371 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2372 | */ | |
788eb90c | 2373 | ss_mv_cnt = 0; |
d683ddbb JG |
2374 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
2375 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2376 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
2377 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2378 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 2379 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 2380 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 2381 | |
788eb90c JJ |
2382 | ss_mv_cnt++; |
2383 | ||
13fe0198 MA |
2384 | /* |
2385 | * If there are long holds, we won't be able to evict | |
2386 | * the objset. | |
2387 | */ | |
2388 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 2389 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
2390 | goto out; |
2391 | } | |
2392 | ||
34dc7c2f | 2393 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 2394 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
2395 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
2396 | err = SET_ERROR(ENAMETOOLONG); | |
2397 | goto out; | |
2398 | } | |
b128c09f | 2399 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 2400 | if (err == 0) { |
13fe0198 | 2401 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); |
2e528b49 | 2402 | err = SET_ERROR(EEXIST); |
428870ff BB |
2403 | goto out; |
2404 | } | |
b128c09f | 2405 | if (err != ENOENT) |
428870ff | 2406 | goto out; |
34dc7c2f | 2407 | |
b128c09f | 2408 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 2409 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 2410 | continue; |
34dc7c2f | 2411 | |
428870ff BB |
2412 | dsl_deadlist_space(&ds->ds_deadlist, |
2413 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
2414 | ddpa->used += dlused; |
2415 | ddpa->comp += dlcomp; | |
2416 | ddpa->uncomp += dluncomp; | |
b128c09f | 2417 | } |
34dc7c2f | 2418 | |
b128c09f BB |
2419 | /* |
2420 | * If we are a clone of a clone then we never reached ORIGIN, | |
2421 | * so we need to subtract out the clone origin's used space. | |
2422 | */ | |
13fe0198 | 2423 | if (ddpa->origin_origin) { |
d683ddbb JG |
2424 | ddpa->used -= |
2425 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2426 | ddpa->comp -= | |
2427 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 2428 | ddpa->uncomp -= |
d683ddbb JG |
2429 | dsl_dataset_phys(ddpa->origin_origin)-> |
2430 | ds_uncompressed_bytes; | |
34dc7c2f BB |
2431 | } |
2432 | ||
788eb90c | 2433 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 2434 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 2435 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
2436 | if (err != 0) |
2437 | goto out; | |
34dc7c2f | 2438 | |
b128c09f BB |
2439 | /* |
2440 | * Compute the amounts of space that will be used by snapshots | |
2441 | * after the promotion (for both origin and clone). For each, | |
2442 | * it is the amount of space that will be on all of their | |
2443 | * deadlists (that was not born before their new origin). | |
2444 | */ | |
d683ddbb | 2445 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
2446 | uint64_t space; |
2447 | ||
2448 | /* | |
2449 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
2450 | * so dd_origin_txg will be < TXG_INITIAL, so |
2451 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
2452 | * calls will be fast because they do not have to |
2453 | * iterate over all bps. | |
2454 | */ | |
13fe0198 MA |
2455 | snap = list_head(&ddpa->origin_snaps); |
2456 | err = snaplist_space(&ddpa->shared_snaps, | |
2457 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2458 | if (err != 0) | |
2459 | goto out; | |
b128c09f | 2460 | |
13fe0198 | 2461 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 2462 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
2463 | if (err != 0) |
2464 | goto out; | |
2465 | ddpa->cloneusedsnap += space; | |
b128c09f | 2466 | } |
d683ddbb JG |
2467 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
2468 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 2469 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
2470 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
2471 | &ddpa->originusedsnap); | |
13fe0198 MA |
2472 | if (err != 0) |
2473 | goto out; | |
b128c09f BB |
2474 | } |
2475 | ||
428870ff | 2476 | out: |
13fe0198 | 2477 | promote_rele(ddpa, FTAG); |
428870ff | 2478 | return (err); |
34dc7c2f BB |
2479 | } |
2480 | ||
2481 | static void | |
13fe0198 | 2482 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2483 | { |
13fe0198 MA |
2484 | dsl_dataset_promote_arg_t *ddpa = arg; |
2485 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2486 | dsl_dataset_t *hds; | |
2487 | struct promotenode *snap; | |
2488 | dsl_dataset_t *origin_ds; | |
b128c09f | 2489 | dsl_dataset_t *origin_head; |
13fe0198 | 2490 | dsl_dir_t *dd; |
34dc7c2f | 2491 | dsl_dir_t *odd = NULL; |
b128c09f BB |
2492 | uint64_t oldnext_obj; |
2493 | int64_t delta; | |
34dc7c2f | 2494 | |
13fe0198 MA |
2495 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
2496 | hds = ddpa->ddpa_clone; | |
2497 | ||
d683ddbb | 2498 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
2499 | |
2500 | snap = list_head(&ddpa->shared_snaps); | |
2501 | origin_ds = snap->ds; | |
2502 | dd = hds->ds_dir; | |
34dc7c2f | 2503 | |
13fe0198 | 2504 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
2505 | origin_head = snap->ds; |
2506 | ||
34dc7c2f BB |
2507 | /* |
2508 | * We need to explicitly open odd, since origin_ds's dd will be | |
2509 | * changing. | |
2510 | */ | |
13fe0198 | 2511 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
2512 | NULL, FTAG, &odd)); |
2513 | ||
b128c09f BB |
2514 | /* change origin's next snap */ |
2515 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 2516 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 2517 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2518 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2519 | origin_ds->ds_object); | |
2520 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
2521 | |
2522 | /* change the origin's next clone */ | |
d683ddbb | 2523 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
2524 | dsl_dataset_remove_from_next_clones(origin_ds, |
2525 | snap->ds->ds_object, tx); | |
2526 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 2527 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
2528 | oldnext_obj, tx)); |
2529 | } | |
2530 | ||
2531 | /* change origin */ | |
2532 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
2533 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
2534 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 2535 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 2536 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 2537 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 2538 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 2539 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
2540 | |
2541 | /* change dd_clone entries */ | |
2542 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 2543 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2544 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 2545 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2546 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
2547 | hds->ds_object, tx)); |
2548 | ||
13fe0198 | 2549 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2550 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 2551 | origin_head->ds_object, tx)); |
d683ddbb JG |
2552 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
2553 | dsl_dir_phys(dd)->dd_clones = | |
2554 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2555 | DMU_OT_NONE, 0, tx); | |
428870ff | 2556 | } |
13fe0198 | 2557 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2558 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 2559 | } |
34dc7c2f | 2560 | |
b128c09f | 2561 | /* move snapshots to this dir */ |
13fe0198 MA |
2562 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2563 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
2564 | dsl_dataset_t *ds = snap->ds; |
2565 | ||
13fe0198 MA |
2566 | /* |
2567 | * Property callbacks are registered to a particular | |
2568 | * dsl_dir. Since ours is changing, evict the objset | |
2569 | * so that they will be unregistered from the old dsl_dir. | |
2570 | */ | |
428870ff BB |
2571 | if (ds->ds_objset) { |
2572 | dmu_objset_evict(ds->ds_objset); | |
2573 | ds->ds_objset = NULL; | |
b128c09f | 2574 | } |
13fe0198 | 2575 | |
34dc7c2f | 2576 | /* move snap name entry */ |
13fe0198 MA |
2577 | VERIFY0(dsl_dataset_get_snapname(ds)); |
2578 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 2579 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 2580 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 2581 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 2582 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
2583 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
2584 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 2585 | |
34dc7c2f BB |
2586 | /* change containing dsl_dir */ |
2587 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
2588 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
2589 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 2590 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
2591 | dsl_dir_rele(ds->ds_dir, ds); |
2592 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
2593 | NULL, ds, &ds->ds_dir)); |
2594 | ||
428870ff | 2595 | /* move any clone references */ |
d683ddbb | 2596 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
2597 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
2598 | zap_cursor_t zc; | |
2599 | zap_attribute_t za; | |
2600 | ||
2601 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 2602 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 2603 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
2604 | zap_cursor_advance(&zc)) { |
2605 | dsl_dataset_t *cnds; | |
2606 | uint64_t o; | |
34dc7c2f | 2607 | |
13fe0198 MA |
2608 | if (za.za_first_integer == oldnext_obj) { |
2609 | /* | |
2610 | * We've already moved the | |
2611 | * origin's reference. | |
2612 | */ | |
2613 | continue; | |
2614 | } | |
34dc7c2f | 2615 | |
13fe0198 MA |
2616 | VERIFY0(dsl_dataset_hold_obj(dp, |
2617 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
2618 | o = dsl_dir_phys(cnds->ds_dir)-> |
2619 | dd_head_dataset_obj; | |
34dc7c2f | 2620 | |
13fe0198 | 2621 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2622 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 2623 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2624 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
2625 | dsl_dataset_rele(cnds, FTAG); |
2626 | } | |
2627 | zap_cursor_fini(&zc); | |
2628 | } | |
34dc7c2f | 2629 | |
13fe0198 | 2630 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
2631 | } |
2632 | ||
34dc7c2f | 2633 | /* |
13fe0198 MA |
2634 | * Change space accounting. |
2635 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2636 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2637 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 2638 | */ |
570827e1 | 2639 | |
13fe0198 | 2640 | delta = ddpa->cloneusedsnap - |
d683ddbb | 2641 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2642 | ASSERT3S(delta, >=, 0); |
2643 | ASSERT3U(ddpa->used, >=, delta); | |
2644 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2645 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2646 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 2647 | |
13fe0198 | 2648 | delta = ddpa->originusedsnap - |
d683ddbb | 2649 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2650 | ASSERT3S(delta, <=, 0); |
2651 | ASSERT3U(ddpa->used, >=, -delta); | |
2652 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2653 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2654 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2655 | ||
d683ddbb | 2656 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
2657 | |
2658 | /* log history record */ | |
2659 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2660 | ||
2661 | dsl_dir_rele(odd, FTAG); | |
2662 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
2663 | } |
2664 | ||
13fe0198 MA |
2665 | /* |
2666 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2667 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2668 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2669 | * snapshots back to this dataset's origin. | |
2670 | */ | |
34dc7c2f | 2671 | static int |
13fe0198 MA |
2672 | snaplist_make(dsl_pool_t *dp, |
2673 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 2674 | { |
13fe0198 | 2675 | uint64_t obj = last_obj; |
34dc7c2f | 2676 | |
13fe0198 MA |
2677 | list_create(l, sizeof (struct promotenode), |
2678 | offsetof(struct promotenode, link)); | |
34dc7c2f | 2679 | |
13fe0198 MA |
2680 | while (obj != first_obj) { |
2681 | dsl_dataset_t *ds; | |
2682 | struct promotenode *snap; | |
2683 | int err; | |
428870ff | 2684 | |
13fe0198 MA |
2685 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
2686 | ASSERT(err != ENOENT); | |
2687 | if (err != 0) | |
2688 | return (err); | |
34dc7c2f | 2689 | |
13fe0198 | 2690 | if (first_obj == 0) |
d683ddbb | 2691 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 2692 | |
79c76d5b | 2693 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
2694 | snap->ds = ds; |
2695 | list_insert_tail(l, snap); | |
d683ddbb | 2696 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 2697 | } |
34dc7c2f BB |
2698 | |
2699 | return (0); | |
2700 | } | |
2701 | ||
13fe0198 MA |
2702 | static int |
2703 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 2704 | { |
13fe0198 | 2705 | struct promotenode *snap; |
6f1ffb06 | 2706 | |
13fe0198 MA |
2707 | *spacep = 0; |
2708 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2709 | uint64_t used, comp, uncomp; | |
2710 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2711 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2712 | *spacep += used; | |
428870ff | 2713 | } |
13fe0198 | 2714 | return (0); |
34dc7c2f BB |
2715 | } |
2716 | ||
13fe0198 MA |
2717 | static void |
2718 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 2719 | { |
13fe0198 | 2720 | struct promotenode *snap; |
428870ff | 2721 | |
13fe0198 MA |
2722 | if (l == NULL || !list_link_active(&l->list_head)) |
2723 | return; | |
34dc7c2f | 2724 | |
13fe0198 MA |
2725 | while ((snap = list_tail(l)) != NULL) { |
2726 | list_remove(l, snap); | |
2727 | dsl_dataset_rele(snap->ds, tag); | |
2728 | kmem_free(snap, sizeof (*snap)); | |
2729 | } | |
2730 | list_destroy(l); | |
34dc7c2f BB |
2731 | } |
2732 | ||
2733 | static int | |
13fe0198 | 2734 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 2735 | { |
13fe0198 MA |
2736 | int error; |
2737 | dsl_dir_t *dd; | |
2738 | struct promotenode *snap; | |
34dc7c2f | 2739 | |
13fe0198 MA |
2740 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
2741 | &ddpa->ddpa_clone); | |
2742 | if (error != 0) | |
2743 | return (error); | |
2744 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 2745 | |
0c66c32d | 2746 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
2747 | !dsl_dir_is_clone(dd)) { |
2748 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 2749 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2750 | } |
34dc7c2f | 2751 | |
d683ddbb | 2752 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
2753 | &ddpa->shared_snaps, tag); |
2754 | if (error != 0) | |
2755 | goto out; | |
34dc7c2f | 2756 | |
13fe0198 MA |
2757 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
2758 | &ddpa->clone_snaps, tag); | |
2759 | if (error != 0) | |
2760 | goto out; | |
34dc7c2f | 2761 | |
13fe0198 | 2762 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
2763 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
2764 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2765 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
2766 | &ddpa->origin_snaps, tag); |
2767 | if (error != 0) | |
2768 | goto out; | |
d164b209 | 2769 | |
d683ddbb | 2770 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 2771 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 2772 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
2773 | tag, &ddpa->origin_origin); |
2774 | if (error != 0) | |
2775 | goto out; | |
d164b209 | 2776 | } |
13fe0198 MA |
2777 | out: |
2778 | if (error != 0) | |
2779 | promote_rele(ddpa, tag); | |
2780 | return (error); | |
34dc7c2f BB |
2781 | } |
2782 | ||
34dc7c2f | 2783 | static void |
13fe0198 | 2784 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 2785 | { |
13fe0198 MA |
2786 | snaplist_destroy(&ddpa->shared_snaps, tag); |
2787 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2788 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2789 | if (ddpa->origin_origin != NULL) | |
2790 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2791 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2792 | } | |
428870ff | 2793 | |
13fe0198 MA |
2794 | /* |
2795 | * Promote a clone. | |
2796 | * | |
2797 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
eca7b760 | 2798 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
13fe0198 MA |
2799 | */ |
2800 | int | |
2801 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2802 | { | |
2803 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2804 | uint64_t numsnaps; | |
2805 | int error; | |
2806 | objset_t *os; | |
34dc7c2f | 2807 | |
13fe0198 MA |
2808 | /* |
2809 | * We will modify space proportional to the number of | |
2810 | * snapshots. Compute numsnaps. | |
2811 | */ | |
2812 | error = dmu_objset_hold(name, FTAG, &os); | |
2813 | if (error != 0) | |
2814 | return (error); | |
2815 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
2816 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
2817 | &numsnaps); | |
13fe0198 MA |
2818 | dmu_objset_rele(os, FTAG); |
2819 | if (error != 0) | |
2820 | return (error); | |
34dc7c2f | 2821 | |
13fe0198 MA |
2822 | ddpa.ddpa_clonename = name; |
2823 | ddpa.err_ds = conflsnap; | |
788eb90c | 2824 | ddpa.cr = CRED(); |
6f1ffb06 | 2825 | |
13fe0198 | 2826 | return (dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 MA |
2827 | dsl_dataset_promote_sync, &ddpa, |
2828 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2829 | } |
2830 | ||
2831 | int | |
13fe0198 | 2832 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 2833 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 2834 | { |
8c62a0d0 DM |
2835 | /* |
2836 | * "slack" factor for received datasets with refquota set on them. | |
2837 | * See the bottom of this function for details on its use. | |
2838 | */ | |
bf18fd89 CIK |
2839 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * |
2840 | spa_asize_inflation; | |
13fe0198 | 2841 | int64_t unused_refres_delta; |
34dc7c2f | 2842 | |
13fe0198 | 2843 | /* they should both be heads */ |
0c66c32d JG |
2844 | if (clone->ds_is_snapshot || |
2845 | origin_head->ds_is_snapshot) | |
2e528b49 | 2846 | return (SET_ERROR(EINVAL)); |
428870ff | 2847 | |
19580676 MA |
2848 | /* if we are not forcing, the branch point should be just before them */ |
2849 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 2850 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2851 | |
13fe0198 MA |
2852 | /* clone should be the clone (unless they are unrelated) */ |
2853 | if (clone->ds_prev != NULL && | |
2854 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 2855 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 2856 | return (SET_ERROR(EINVAL)); |
428870ff | 2857 | |
13fe0198 MA |
2858 | /* the clone should be a child of the origin */ |
2859 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 2860 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 2861 | |
13fe0198 | 2862 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
2863 | if (!force && |
2864 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 2865 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 2866 | |
13fe0198 | 2867 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 2868 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 2869 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
2870 | |
2871 | /* check amount of any unconsumed refreservation */ | |
2872 | unused_refres_delta = | |
2873 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2874 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2875 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2876 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2877 | |
2878 | if (unused_refres_delta > 0 && | |
2879 | unused_refres_delta > | |
2880 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 2881 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2882 | |
8c62a0d0 DM |
2883 | /* |
2884 | * The clone can't be too much over the head's refquota. | |
2885 | * | |
2886 | * To ensure that the entire refquota can be used, we allow one | |
2887 | * transaction to exceed the the refquota. Therefore, this check | |
2888 | * needs to also allow for the space referenced to be more than the | |
2889 | * refquota. The maximum amount of space that one transaction can use | |
2890 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
2891 | * overage ensures that we are able to receive a filesystem that | |
2892 | * exceeds the refquota on the source system. | |
2893 | * | |
2894 | * So that overage is the refquota_slack we use below. | |
2895 | */ | |
13fe0198 | 2896 | if (origin_head->ds_quota != 0 && |
d683ddbb | 2897 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
8c62a0d0 | 2898 | origin_head->ds_quota + refquota_slack) |
2e528b49 | 2899 | return (SET_ERROR(EDQUOT)); |
572e2857 | 2900 | |
13fe0198 | 2901 | return (0); |
572e2857 BB |
2902 | } |
2903 | ||
2904 | void | |
13fe0198 MA |
2905 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
2906 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 2907 | { |
241b5415 | 2908 | spa_feature_t f; |
13fe0198 MA |
2909 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2910 | int64_t unused_refres_delta; | |
428870ff | 2911 | |
13fe0198 | 2912 | ASSERT(clone->ds_reserved == 0); |
8c62a0d0 DM |
2913 | /* |
2914 | * NOTE: On DEBUG kernels there could be a race between this and | |
2915 | * the check function if spa_asize_inflation is adjusted... | |
2916 | */ | |
13fe0198 | 2917 | ASSERT(origin_head->ds_quota == 0 || |
8c62a0d0 DM |
2918 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
2919 | DMU_MAX_ACCESS * spa_asize_inflation); | |
19580676 | 2920 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 2921 | |
241b5415 MA |
2922 | /* |
2923 | * Swap per-dataset feature flags. | |
2924 | */ | |
2925 | for (f = 0; f < SPA_FEATURES; f++) { | |
2926 | boolean_t clone_inuse; | |
2927 | boolean_t origin_head_inuse; | |
2928 | ||
2929 | if (!(spa_feature_table[f].fi_flags & | |
2930 | ZFEATURE_FLAG_PER_DATASET)) { | |
2931 | ASSERT(!clone->ds_feature_inuse[f]); | |
2932 | ASSERT(!origin_head->ds_feature_inuse[f]); | |
2933 | continue; | |
2934 | } | |
2935 | ||
2936 | clone_inuse = clone->ds_feature_inuse[f]; | |
2937 | origin_head_inuse = origin_head->ds_feature_inuse[f]; | |
2938 | ||
2939 | if (clone_inuse) { | |
2940 | dsl_dataset_deactivate_feature(clone->ds_object, f, tx); | |
2941 | clone->ds_feature_inuse[f] = B_FALSE; | |
2942 | } | |
2943 | if (origin_head_inuse) { | |
2944 | dsl_dataset_deactivate_feature(origin_head->ds_object, | |
2945 | f, tx); | |
2946 | origin_head->ds_feature_inuse[f] = B_FALSE; | |
2947 | } | |
2948 | if (clone_inuse) { | |
2949 | dsl_dataset_activate_feature(origin_head->ds_object, | |
2950 | f, tx); | |
2951 | origin_head->ds_feature_inuse[f] = B_TRUE; | |
2952 | } | |
2953 | if (origin_head_inuse) { | |
2954 | dsl_dataset_activate_feature(clone->ds_object, f, tx); | |
2955 | clone->ds_feature_inuse[f] = B_TRUE; | |
2956 | } | |
2957 | } | |
2958 | ||
13fe0198 MA |
2959 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
2960 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 2961 | |
13fe0198 MA |
2962 | if (clone->ds_objset != NULL) { |
2963 | dmu_objset_evict(clone->ds_objset); | |
2964 | clone->ds_objset = NULL; | |
2965 | } | |
45d1cae3 | 2966 | |
13fe0198 MA |
2967 | if (origin_head->ds_objset != NULL) { |
2968 | dmu_objset_evict(origin_head->ds_objset); | |
2969 | origin_head->ds_objset = NULL; | |
45d1cae3 | 2970 | } |
45d1cae3 | 2971 | |
13fe0198 MA |
2972 | unused_refres_delta = |
2973 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2974 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2975 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2976 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2977 | |
2978 | /* | |
2979 | * Reset origin's unique bytes, if it exists. | |
2980 | */ | |
2981 | if (clone->ds_prev) { | |
2982 | dsl_dataset_t *origin = clone->ds_prev; | |
2983 | uint64_t comp, uncomp; | |
2984 | ||
2985 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
2986 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
2987 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
2988 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
2989 | } |
2990 | ||
2991 | /* swap blkptrs */ | |
2992 | { | |
2993 | blkptr_t tmp; | |
d683ddbb JG |
2994 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
2995 | dsl_dataset_phys(origin_head)->ds_bp = | |
2996 | dsl_dataset_phys(clone)->ds_bp; | |
2997 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
13fe0198 MA |
2998 | } |
2999 | ||
3000 | /* set dd_*_bytes */ | |
3001 | { | |
3002 | int64_t dused, dcomp, duncomp; | |
3003 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
3004 | uint64_t odl_used, odl_comp, odl_uncomp; | |
3005 | ||
d683ddbb | 3006 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
3007 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
3008 | ||
3009 | dsl_deadlist_space(&clone->ds_deadlist, | |
3010 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3011 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
3012 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 3013 | |
d683ddbb JG |
3014 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
3015 | cdl_used - | |
3016 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
3017 | odl_used); | |
3018 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
3019 | cdl_comp - | |
3020 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
3021 | odl_comp); | |
3022 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 3023 | cdl_uncomp - |
d683ddbb JG |
3024 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
3025 | odl_uncomp); | |
45d1cae3 | 3026 | |
13fe0198 MA |
3027 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
3028 | dused, dcomp, duncomp, tx); | |
3029 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
3030 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 3031 | |
45d1cae3 | 3032 | /* |
13fe0198 MA |
3033 | * The difference in the space used by snapshots is the |
3034 | * difference in snapshot space due to the head's | |
3035 | * deadlist (since that's the only thing that's | |
3036 | * changing that affects the snapused). | |
45d1cae3 | 3037 | */ |
13fe0198 MA |
3038 | dsl_deadlist_space_range(&clone->ds_deadlist, |
3039 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3040 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3041 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
3042 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3043 | &odl_used, &odl_comp, &odl_uncomp); | |
3044 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
3045 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 3046 | } |
45d1cae3 | 3047 | |
13fe0198 | 3048 | /* swap ds_*_bytes */ |
d683ddbb JG |
3049 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
3050 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
3051 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
3052 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
3053 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
3054 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
3055 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
3056 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 3057 | |
13fe0198 MA |
3058 | /* apply any parent delta for change in unconsumed refreservation */ |
3059 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
3060 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 3061 | |
13fe0198 MA |
3062 | /* |
3063 | * Swap deadlists. | |
3064 | */ | |
3065 | dsl_deadlist_close(&clone->ds_deadlist); | |
3066 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
3067 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
3068 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 3069 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3070 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 3071 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3072 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
45d1cae3 | 3073 | |
13fe0198 | 3074 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 3075 | |
13fe0198 MA |
3076 | spa_history_log_internal_ds(clone, "clone swap", tx, |
3077 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
3078 | } |
3079 | ||
13fe0198 MA |
3080 | /* |
3081 | * Given a pool name and a dataset object number in that pool, | |
3082 | * return the name of that dataset. | |
3083 | */ | |
572e2857 | 3084 | int |
13fe0198 | 3085 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 3086 | { |
13fe0198 MA |
3087 | dsl_pool_t *dp; |
3088 | dsl_dataset_t *ds; | |
572e2857 BB |
3089 | int error; |
3090 | ||
13fe0198 MA |
3091 | error = dsl_pool_hold(pname, FTAG, &dp); |
3092 | if (error != 0) | |
3093 | return (error); | |
3094 | ||
3095 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
3096 | if (error == 0) { | |
3097 | dsl_dataset_name(ds, buf); | |
3098 | dsl_dataset_rele(ds, FTAG); | |
3099 | } | |
3100 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
3101 | |
3102 | return (error); | |
3103 | } | |
3104 | ||
45d1cae3 | 3105 | int |
13fe0198 MA |
3106 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
3107 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 3108 | { |
13fe0198 | 3109 | int error = 0; |
45d1cae3 | 3110 | |
13fe0198 | 3111 | ASSERT3S(asize, >, 0); |
45d1cae3 | 3112 | |
13fe0198 MA |
3113 | /* |
3114 | * *ref_rsrv is the portion of asize that will come from any | |
3115 | * unconsumed refreservation space. | |
3116 | */ | |
3117 | *ref_rsrv = 0; | |
45d1cae3 | 3118 | |
13fe0198 MA |
3119 | mutex_enter(&ds->ds_lock); |
3120 | /* | |
3121 | * Make a space adjustment for reserved bytes. | |
3122 | */ | |
d683ddbb | 3123 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 3124 | ASSERT3U(*used, >=, |
d683ddbb JG |
3125 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
3126 | *used -= | |
3127 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
3128 | *ref_rsrv = |
3129 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
3130 | } |
3131 | ||
13fe0198 MA |
3132 | if (!check_quota || ds->ds_quota == 0) { |
3133 | mutex_exit(&ds->ds_lock); | |
3134 | return (0); | |
45d1cae3 | 3135 | } |
13fe0198 MA |
3136 | /* |
3137 | * If they are requesting more space, and our current estimate | |
3138 | * is over quota, they get to try again unless the actual | |
3139 | * on-disk is over quota and there are no pending changes (which | |
3140 | * may free up space for us). | |
3141 | */ | |
d683ddbb JG |
3142 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
3143 | ds->ds_quota) { | |
13fe0198 | 3144 | if (inflight > 0 || |
d683ddbb | 3145 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 3146 | error = SET_ERROR(ERESTART); |
13fe0198 | 3147 | else |
2e528b49 | 3148 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 3149 | } |
13fe0198 | 3150 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3151 | |
45d1cae3 BB |
3152 | return (error); |
3153 | } | |
3154 | ||
13fe0198 MA |
3155 | typedef struct dsl_dataset_set_qr_arg { |
3156 | const char *ddsqra_name; | |
3157 | zprop_source_t ddsqra_source; | |
3158 | uint64_t ddsqra_value; | |
3159 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 3160 | |
13fe0198 MA |
3161 | |
3162 | /* ARGSUSED */ | |
45d1cae3 | 3163 | static int |
13fe0198 | 3164 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3165 | { |
13fe0198 MA |
3166 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3167 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3168 | dsl_dataset_t *ds; | |
45d1cae3 | 3169 | int error; |
13fe0198 | 3170 | uint64_t newval; |
45d1cae3 | 3171 | |
13fe0198 | 3172 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 3173 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3174 | |
13fe0198 MA |
3175 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3176 | if (error != 0) | |
3177 | return (error); | |
3178 | ||
0c66c32d | 3179 | if (ds->ds_is_snapshot) { |
13fe0198 | 3180 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3181 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3182 | } |
3183 | ||
13fe0198 MA |
3184 | error = dsl_prop_predict(ds->ds_dir, |
3185 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3186 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3187 | if (error != 0) { | |
3188 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3189 | return (error); |
3190 | } | |
3191 | ||
13fe0198 MA |
3192 | if (newval == 0) { |
3193 | dsl_dataset_rele(ds, FTAG); | |
3194 | return (0); | |
3195 | } | |
3196 | ||
d683ddbb | 3197 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
3198 | newval < ds->ds_reserved) { |
3199 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3200 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3201 | } |
45d1cae3 | 3202 | |
13fe0198 | 3203 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3204 | return (0); |
3205 | } | |
3206 | ||
13fe0198 MA |
3207 | static void |
3208 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3209 | { |
13fe0198 MA |
3210 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3211 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3212 | dsl_dataset_t *ds = NULL; |
13fe0198 | 3213 | uint64_t newval; |
45d1cae3 | 3214 | |
13fe0198 | 3215 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 3216 | |
13fe0198 MA |
3217 | dsl_prop_set_sync_impl(ds, |
3218 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3219 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
3220 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3221 | |
13fe0198 MA |
3222 | VERIFY0(dsl_prop_get_int_ds(ds, |
3223 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 3224 | |
13fe0198 MA |
3225 | if (ds->ds_quota != newval) { |
3226 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3227 | ds->ds_quota = newval; | |
45d1cae3 | 3228 | } |
13fe0198 | 3229 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3230 | } |
3231 | ||
13fe0198 MA |
3232 | int |
3233 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
3234 | uint64_t refquota) | |
45d1cae3 | 3235 | { |
13fe0198 | 3236 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3237 | |
13fe0198 MA |
3238 | ddsqra.ddsqra_name = dsname; |
3239 | ddsqra.ddsqra_source = source; | |
3240 | ddsqra.ddsqra_value = refquota; | |
3241 | ||
3242 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3d45fdd6 | 3243 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); |
45d1cae3 BB |
3244 | } |
3245 | ||
3246 | static int | |
13fe0198 | 3247 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3248 | { |
13fe0198 MA |
3249 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3250 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
3251 | dsl_dataset_t *ds; |
3252 | int error; | |
13fe0198 | 3253 | uint64_t newval, unique; |
428870ff | 3254 | |
13fe0198 | 3255 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 3256 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3257 | |
13fe0198 MA |
3258 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3259 | if (error != 0) | |
45d1cae3 | 3260 | return (error); |
45d1cae3 | 3261 | |
0c66c32d | 3262 | if (ds->ds_is_snapshot) { |
13fe0198 | 3263 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3264 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3265 | } |
3266 | ||
13fe0198 MA |
3267 | error = dsl_prop_predict(ds->ds_dir, |
3268 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3269 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3270 | if (error != 0) { | |
3271 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3272 | return (error); |
3273 | } | |
3274 | ||
13fe0198 MA |
3275 | /* |
3276 | * If we are doing the preliminary check in open context, the | |
3277 | * space estimates may be inaccurate. | |
3278 | */ | |
3279 | if (!dmu_tx_is_syncing(tx)) { | |
3280 | dsl_dataset_rele(ds, FTAG); | |
3281 | return (0); | |
45d1cae3 | 3282 | } |
45d1cae3 | 3283 | |
13fe0198 MA |
3284 | mutex_enter(&ds->ds_lock); |
3285 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3286 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 3287 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 3288 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3289 | |
13fe0198 MA |
3290 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
3291 | uint64_t delta = MAX(unique, newval) - | |
3292 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 3293 | |
13fe0198 MA |
3294 | if (delta > |
3295 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3296 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3297 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3298 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3299 | } |
45d1cae3 BB |
3300 | } |
3301 | ||
13fe0198 MA |
3302 | dsl_dataset_rele(ds, FTAG); |
3303 | return (0); | |
45d1cae3 BB |
3304 | } |
3305 | ||
13fe0198 MA |
3306 | void |
3307 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3308 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 3309 | { |
13fe0198 MA |
3310 | uint64_t newval; |
3311 | uint64_t unique; | |
3312 | int64_t delta; | |
428870ff | 3313 | |
13fe0198 MA |
3314 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
3315 | source, sizeof (value), 1, &value, tx); | |
428870ff | 3316 | |
13fe0198 MA |
3317 | VERIFY0(dsl_prop_get_int_ds(ds, |
3318 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 3319 | |
13fe0198 MA |
3320 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
3321 | mutex_enter(&ds->ds_dir->dd_lock); | |
3322 | mutex_enter(&ds->ds_lock); | |
3323 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 3324 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
3325 | delta = MAX(0, (int64_t)(newval - unique)) - |
3326 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3327 | ds->ds_reserved = newval; | |
3328 | mutex_exit(&ds->ds_lock); | |
572e2857 | 3329 | |
13fe0198 MA |
3330 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
3331 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
3332 | } |
3333 | ||
13fe0198 MA |
3334 | static void |
3335 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3336 | { |
13fe0198 MA |
3337 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3338 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3339 | dsl_dataset_t *ds = NULL; |
45d1cae3 | 3340 | |
13fe0198 MA |
3341 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
3342 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3343 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3344 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 3345 | } |
428870ff | 3346 | |
428870ff | 3347 | int |
13fe0198 MA |
3348 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
3349 | uint64_t refreservation) | |
428870ff | 3350 | { |
13fe0198 | 3351 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3352 | |
13fe0198 MA |
3353 | ddsqra.ddsqra_name = dsname; |
3354 | ddsqra.ddsqra_source = source; | |
3355 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 3356 | |
13fe0198 | 3357 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
3d45fdd6 MA |
3358 | dsl_dataset_set_refreservation_sync, &ddsqra, |
3359 | 0, ZFS_SPACE_CHECK_NONE)); | |
13fe0198 | 3360 | } |
330d06f9 MA |
3361 | |
3362 | /* | |
3363 | * Return (in *usedp) the amount of space written in new that is not | |
3364 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3365 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3366 | * fail and return EINVAL. | |
3367 | * | |
3368 | * The written space is calculated by considering two components: First, we | |
3369 | * ignore any freed space, and calculate the written as new's used space | |
3370 | * minus old's used space. Next, we add in the amount of space that was freed | |
3371 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3372 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3373 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3374 | * | |
3375 | * space freed [---------------------] | |
3376 | * snapshots ---O-------O--------O-------O------ | |
3377 | * oldsnap new | |
3378 | */ | |
3379 | int | |
3380 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3381 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3382 | { | |
3383 | int err = 0; | |
3384 | uint64_t snapobj; | |
3385 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3386 | ||
13fe0198 MA |
3387 | ASSERT(dsl_pool_config_held(dp)); |
3388 | ||
330d06f9 | 3389 | *usedp = 0; |
d683ddbb JG |
3390 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
3391 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
3392 | |
3393 | *compp = 0; | |
d683ddbb JG |
3394 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
3395 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
3396 | |
3397 | *uncompp = 0; | |
d683ddbb JG |
3398 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
3399 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 3400 | |
330d06f9 MA |
3401 | snapobj = new->ds_object; |
3402 | while (snapobj != oldsnap->ds_object) { | |
3403 | dsl_dataset_t *snap; | |
3404 | uint64_t used, comp, uncomp; | |
3405 | ||
9ae529ec CS |
3406 | if (snapobj == new->ds_object) { |
3407 | snap = new; | |
3408 | } else { | |
3409 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3410 | if (err != 0) | |
3411 | break; | |
3412 | } | |
330d06f9 | 3413 | |
d683ddbb JG |
3414 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
3415 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
3416 | /* |
3417 | * The blocks in the deadlist can not be born after | |
3418 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3419 | * which is more efficient (especially for old-format | |
3420 | * deadlists). Unfortunately the deadlist code | |
3421 | * doesn't have enough information to make this | |
3422 | * optimization itself. | |
3423 | */ | |
3424 | dsl_deadlist_space(&snap->ds_deadlist, | |
3425 | &used, &comp, &uncomp); | |
3426 | } else { | |
3427 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 3428 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
3429 | &used, &comp, &uncomp); |
3430 | } | |
3431 | *usedp += used; | |
3432 | *compp += comp; | |
3433 | *uncompp += uncomp; | |
3434 | ||
3435 | /* | |
3436 | * If we get to the beginning of the chain of snapshots | |
3437 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3438 | * was not a snapshot of/before new. | |
3439 | */ | |
d683ddbb | 3440 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
3441 | if (snap != new) |
3442 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 3443 | if (snapobj == 0) { |
2e528b49 | 3444 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
3445 | break; |
3446 | } | |
3447 | ||
3448 | } | |
330d06f9 MA |
3449 | return (err); |
3450 | } | |
3451 | ||
3452 | /* | |
3453 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3454 | * lastsnap, and all snapshots in between are deleted. | |
3455 | * | |
3456 | * blocks that would be freed [---------------------------] | |
3457 | * snapshots ---O-------O--------O-------O--------O | |
3458 | * firstsnap lastsnap | |
3459 | * | |
3460 | * This is the set of blocks that were born after the snap before firstsnap, | |
3461 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3462 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3463 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3464 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3465 | * space on the deadlist that was born after the snap before firstsnap. | |
3466 | */ | |
3467 | int | |
3468 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3469 | dsl_dataset_t *lastsnap, | |
3470 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3471 | { | |
3472 | int err = 0; | |
3473 | uint64_t snapobj; | |
3474 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3475 | ||
0c66c32d JG |
3476 | ASSERT(firstsnap->ds_is_snapshot); |
3477 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
3478 | |
3479 | /* | |
3480 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3481 | * is before lastsnap. | |
3482 | */ | |
3483 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
3484 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
3485 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 3486 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
3487 | |
3488 | *usedp = *compp = *uncompp = 0; | |
3489 | ||
d683ddbb | 3490 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
3491 | while (snapobj != firstsnap->ds_object) { |
3492 | dsl_dataset_t *ds; | |
3493 | uint64_t used, comp, uncomp; | |
3494 | ||
3495 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3496 | if (err != 0) | |
3497 | break; | |
3498 | ||
3499 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 3500 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
3501 | &used, &comp, &uncomp); |
3502 | *usedp += used; | |
3503 | *compp += comp; | |
3504 | *uncompp += uncomp; | |
3505 | ||
d683ddbb | 3506 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
3507 | ASSERT3U(snapobj, !=, 0); |
3508 | dsl_dataset_rele(ds, FTAG); | |
3509 | } | |
330d06f9 MA |
3510 | return (err); |
3511 | } | |
3512 | ||
13fe0198 MA |
3513 | /* |
3514 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3515 | * For example, they could both be snapshots of the same filesystem, and | |
3516 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3517 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3518 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
3519 | * |
3520 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
3521 | */ |
3522 | boolean_t | |
da536844 MA |
3523 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
3524 | uint64_t earlier_txg) | |
13fe0198 MA |
3525 | { |
3526 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3527 | int error; | |
3528 | boolean_t ret; | |
3529 | dsl_dataset_t *origin; | |
3530 | ||
3531 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 3532 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
3533 | |
3534 | if (earlier_txg == 0) | |
d683ddbb | 3535 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 3536 | |
0c66c32d | 3537 | if (later->ds_is_snapshot && |
d683ddbb | 3538 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
3539 | return (B_FALSE); |
3540 | ||
3541 | if (later->ds_dir == earlier->ds_dir) | |
3542 | return (B_TRUE); | |
3543 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3544 | return (B_FALSE); | |
3545 | ||
d683ddbb | 3546 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 MA |
3547 | return (B_TRUE); |
3548 | error = dsl_dataset_hold_obj(dp, | |
d683ddbb | 3549 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
3550 | if (error != 0) |
3551 | return (B_FALSE); | |
da536844 | 3552 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
3553 | dsl_dataset_rele(origin, FTAG); |
3554 | return (ret); | |
3555 | } | |
3556 | ||
fa86b5db MA |
3557 | void |
3558 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3559 | { | |
3560 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3561 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3562 | } | |
3563 | ||
47dfff3b MA |
3564 | boolean_t |
3565 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
3566 | { | |
3567 | dmu_object_info_t doi; | |
3568 | ||
3569 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
3570 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
3571 | } | |
3572 | ||
3573 | boolean_t | |
3574 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
3575 | { | |
3576 | return (dsl_dataset_is_zapified(ds) && | |
3577 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
3578 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
3579 | } | |
3580 | ||
c28b2279 | 3581 | #if defined(_KERNEL) && defined(HAVE_SPL) |
f1512ee6 MA |
3582 | #if defined(_LP64) |
3583 | module_param(zfs_max_recordsize, int, 0644); | |
3584 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3585 | #else | |
3586 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3587 | module_param(zfs_max_recordsize, int, 0444); | |
3588 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3589 | #endif | |
3590 | ||
c28b2279 BB |
3591 | EXPORT_SYMBOL(dsl_dataset_hold); |
3592 | EXPORT_SYMBOL(dsl_dataset_hold_obj); | |
3593 | EXPORT_SYMBOL(dsl_dataset_own); | |
3594 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3595 | EXPORT_SYMBOL(dsl_dataset_name); | |
3596 | EXPORT_SYMBOL(dsl_dataset_rele); | |
3597 | EXPORT_SYMBOL(dsl_dataset_disown); | |
c28b2279 | 3598 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
3599 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
3600 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
3601 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
3602 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 3603 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
3604 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
3605 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
3606 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
3607 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
3608 | EXPORT_SYMBOL(dsl_dataset_set_blkptr); | |
3609 | EXPORT_SYMBOL(dsl_dataset_get_spa); | |
19580676 | 3610 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
3611 | EXPORT_SYMBOL(dsl_dataset_space_written); |
3612 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
3613 | EXPORT_SYMBOL(dsl_dataset_sync); |
3614 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3615 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
3616 | EXPORT_SYMBOL(dsl_dataset_block_freeable); | |
3617 | EXPORT_SYMBOL(dsl_dataset_prev_snap_txg); | |
3618 | EXPORT_SYMBOL(dsl_dataset_dirty); | |
3619 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3620 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3621 | EXPORT_SYMBOL(dsl_dataset_space); | |
3622 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3623 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3624 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
3625 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
3626 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 3627 | #endif |