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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> | |
3c67d83a | 59 | #include <sys/zio_checksum.h> |
34dc7c2f | 60 | |
f1512ee6 MA |
61 | /* |
62 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
63 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
64 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
65 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
66 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
67 | * and pools with larger blocks can always be imported and used, regardless | |
68 | * of this setting. | |
69 | */ | |
70 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
71 | ||
428870ff BB |
72 | #define SWITCH64(x, y) \ |
73 | { \ | |
74 | uint64_t __tmp = (x); \ | |
75 | (x) = (y); \ | |
76 | (y) = __tmp; \ | |
77 | } | |
78 | ||
34dc7c2f BB |
79 | #define DS_REF_MAX (1ULL << 62) |
80 | ||
d683ddbb | 81 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 82 | |
8c62a0d0 DM |
83 | extern int spa_asize_inflation; |
84 | ||
34dc7c2f BB |
85 | /* |
86 | * Figure out how much of this delta should be propogated to the dsl_dir | |
87 | * layer. If there's a refreservation, that space has already been | |
88 | * partially accounted for in our ancestors. | |
89 | */ | |
90 | static int64_t | |
91 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
92 | { | |
d683ddbb | 93 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
94 | uint64_t old_bytes, new_bytes; |
95 | ||
96 | if (ds->ds_reserved == 0) | |
97 | return (delta); | |
98 | ||
d683ddbb JG |
99 | ds_phys = dsl_dataset_phys(ds); |
100 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
101 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
34dc7c2f BB |
102 | |
103 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
104 | return (new_bytes - old_bytes); | |
105 | } | |
106 | ||
107 | void | |
428870ff | 108 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 109 | { |
d6320ddb | 110 | int used, compressed, uncompressed; |
34dc7c2f | 111 | int64_t delta; |
3c67d83a | 112 | spa_feature_t f; |
34dc7c2f | 113 | |
d6320ddb BB |
114 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
115 | compressed = BP_GET_PSIZE(bp); | |
116 | uncompressed = BP_GET_UCSIZE(bp); | |
117 | ||
428870ff | 118 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
119 | |
120 | ASSERT(dmu_tx_is_syncing(tx)); | |
121 | /* It could have been compressed away to nothing */ | |
122 | if (BP_IS_HOLE(bp)) | |
123 | return; | |
124 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 125 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 126 | if (ds == NULL) { |
29809a6c MA |
127 | dsl_pool_mos_diduse_space(tx->tx_pool, |
128 | used, compressed, uncompressed); | |
34dc7c2f BB |
129 | return; |
130 | } | |
428870ff | 131 | |
a169a625 | 132 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
133 | mutex_enter(&ds->ds_lock); |
134 | delta = parent_delta(ds, used); | |
d683ddbb JG |
135 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
136 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
137 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
138 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
3c67d83a | 139 | |
241b5415 MA |
140 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
141 | ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = | |
142 | B_TRUE; | |
143 | } | |
3c67d83a TH |
144 | |
145 | f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); | |
146 | if (f != SPA_FEATURE_NONE) | |
147 | ds->ds_feature_activation_needed[f] = B_TRUE; | |
148 | ||
34dc7c2f | 149 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
150 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
151 | compressed, uncompressed, tx); | |
152 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
153 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
154 | } |
155 | ||
b128c09f | 156 | int |
428870ff BB |
157 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
158 | boolean_t async) | |
34dc7c2f | 159 | { |
b0bc7a84 MG |
160 | int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
161 | int compressed = BP_GET_PSIZE(bp); | |
162 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 163 | |
34dc7c2f | 164 | if (BP_IS_HOLE(bp)) |
b128c09f | 165 | return (0); |
34dc7c2f | 166 | |
428870ff BB |
167 | ASSERT(dmu_tx_is_syncing(tx)); |
168 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
169 | ||
34dc7c2f | 170 | if (ds == NULL) { |
428870ff | 171 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
172 | dsl_pool_mos_diduse_space(tx->tx_pool, |
173 | -used, -compressed, -uncompressed); | |
b128c09f | 174 | return (used); |
34dc7c2f BB |
175 | } |
176 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
177 | ||
0c66c32d | 178 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
179 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
180 | ||
d683ddbb | 181 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
182 | int64_t delta; |
183 | ||
428870ff BB |
184 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
185 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
186 | |
187 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 188 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
189 | !DS_UNIQUE_IS_ACCURATE(ds)); |
190 | delta = parent_delta(ds, -used); | |
d683ddbb | 191 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 192 | mutex_exit(&ds->ds_lock); |
b128c09f | 193 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 194 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
195 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
196 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
197 | } else { |
198 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
199 | if (async) { |
200 | /* | |
201 | * We are here as part of zio's write done callback, | |
202 | * which means we're a zio interrupt thread. We can't | |
203 | * call dsl_deadlist_insert() now because it may block | |
204 | * waiting for I/O. Instead, put bp on the deferred | |
205 | * queue and let dsl_pool_sync() finish the job. | |
206 | */ | |
207 | bplist_append(&ds->ds_pending_deadlist, bp); | |
208 | } else { | |
209 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
210 | } | |
34dc7c2f | 211 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
212 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
213 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 214 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 215 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 216 | ds->ds_object && bp->blk_birth > |
d683ddbb | 217 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
218 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
219 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 220 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
221 | mutex_exit(&ds->ds_prev->ds_lock); |
222 | } | |
428870ff | 223 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
224 | dsl_dir_transfer_space(ds->ds_dir, used, |
225 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
226 | } | |
34dc7c2f BB |
227 | } |
228 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
229 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
230 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
231 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
232 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
233 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
234 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 235 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
236 | |
237 | return (used); | |
34dc7c2f BB |
238 | } |
239 | ||
240 | uint64_t | |
241 | dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
242 | { | |
243 | uint64_t trysnap = 0; | |
244 | ||
245 | if (ds == NULL) | |
246 | return (0); | |
247 | /* | |
248 | * The snapshot creation could fail, but that would cause an | |
249 | * incorrect FALSE return, which would only result in an | |
250 | * overestimation of the amount of space that an operation would | |
251 | * consume, which is OK. | |
252 | * | |
253 | * There's also a small window where we could miss a pending | |
254 | * snapshot, because we could set the sync task in the quiescing | |
255 | * phase. So this should only be used as a guess. | |
256 | */ | |
257 | if (ds->ds_trysnap_txg > | |
258 | spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
259 | trysnap = ds->ds_trysnap_txg; | |
d683ddbb | 260 | return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); |
34dc7c2f BB |
261 | } |
262 | ||
9babb374 | 263 | boolean_t |
428870ff BB |
264 | dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, |
265 | uint64_t blk_birth) | |
34dc7c2f | 266 | { |
b0bc7a84 MG |
267 | if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || |
268 | (bp != NULL && BP_IS_HOLE(bp))) | |
428870ff BB |
269 | return (B_FALSE); |
270 | ||
572e2857 | 271 | ddt_prefetch(dsl_dataset_get_spa(ds), bp); |
428870ff BB |
272 | |
273 | return (B_TRUE); | |
34dc7c2f BB |
274 | } |
275 | ||
34dc7c2f | 276 | static void |
0c66c32d | 277 | dsl_dataset_evict(void *dbu) |
34dc7c2f | 278 | { |
0c66c32d | 279 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 280 | |
13fe0198 | 281 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 282 | |
0c66c32d JG |
283 | ds->ds_dbuf = NULL; |
284 | ||
34dc7c2f BB |
285 | unique_remove(ds->ds_fsid_guid); |
286 | ||
428870ff BB |
287 | if (ds->ds_objset != NULL) |
288 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
289 | |
290 | if (ds->ds_prev) { | |
13fe0198 | 291 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
292 | ds->ds_prev = NULL; |
293 | } | |
294 | ||
428870ff | 295 | bplist_destroy(&ds->ds_pending_deadlist); |
0c66c32d | 296 | if (ds->ds_deadlist.dl_os != NULL) |
428870ff | 297 | dsl_deadlist_close(&ds->ds_deadlist); |
b128c09f | 298 | if (ds->ds_dir) |
0c66c32d | 299 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
300 | |
301 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
302 | ||
0eb21616 | 303 | list_destroy(&ds->ds_prop_cbs); |
34dc7c2f BB |
304 | mutex_destroy(&ds->ds_lock); |
305 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 306 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 307 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f BB |
308 | |
309 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
310 | } | |
311 | ||
13fe0198 | 312 | int |
34dc7c2f BB |
313 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
314 | { | |
315 | dsl_dataset_phys_t *headphys; | |
316 | int err; | |
317 | dmu_buf_t *headdbuf; | |
318 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
319 | objset_t *mos = dp->dp_meta_objset; | |
320 | ||
321 | if (ds->ds_snapname[0]) | |
322 | return (0); | |
d683ddbb | 323 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
324 | return (0); |
325 | ||
d683ddbb | 326 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 327 | FTAG, &headdbuf); |
13fe0198 | 328 | if (err != 0) |
34dc7c2f BB |
329 | return (err); |
330 | headphys = headdbuf->db_data; | |
331 | err = zap_value_search(dp->dp_meta_objset, | |
332 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
333 | if (err != 0 && zfs_recover == B_TRUE) { |
334 | err = 0; | |
335 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
336 | "SNAPOBJ=%llu-ERR=%d", | |
337 | (unsigned long long)ds->ds_object, err); | |
338 | } | |
34dc7c2f BB |
339 | dmu_buf_rele(headdbuf, FTAG); |
340 | return (err); | |
341 | } | |
342 | ||
6772fb67 | 343 | int |
b128c09f | 344 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 345 | { |
b128c09f | 346 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 347 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
348 | matchtype_t mt; |
349 | int err; | |
350 | ||
d683ddbb | 351 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
352 | mt = MT_FIRST; |
353 | else | |
354 | mt = MT_EXACT; | |
355 | ||
b128c09f | 356 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f BB |
357 | value, mt, NULL, 0, NULL); |
358 | if (err == ENOTSUP && mt == MT_FIRST) | |
b128c09f | 359 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
360 | return (err); |
361 | } | |
362 | ||
13fe0198 | 363 | int |
788eb90c JJ |
364 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
365 | boolean_t adj_cnt) | |
34dc7c2f | 366 | { |
b128c09f | 367 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 368 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
34dc7c2f BB |
369 | matchtype_t mt; |
370 | int err; | |
371 | ||
428870ff BB |
372 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
373 | ||
d683ddbb | 374 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
34dc7c2f BB |
375 | mt = MT_FIRST; |
376 | else | |
377 | mt = MT_EXACT; | |
378 | ||
b128c09f | 379 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
34dc7c2f | 380 | if (err == ENOTSUP && mt == MT_FIRST) |
b128c09f | 381 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
382 | |
383 | if (err == 0 && adj_cnt) | |
384 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
385 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
386 | ||
34dc7c2f BB |
387 | return (err); |
388 | } | |
389 | ||
6ebebace JG |
390 | boolean_t |
391 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
392 | { | |
6186e297 JG |
393 | dmu_buf_t *dbuf = ds->ds_dbuf; |
394 | boolean_t result = B_FALSE; | |
395 | ||
396 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
397 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
398 | ||
399 | if (ds == dmu_buf_get_user(dbuf)) | |
400 | result = B_TRUE; | |
401 | else | |
402 | dmu_buf_rele(dbuf, tag); | |
403 | } | |
404 | ||
405 | return (result); | |
6ebebace JG |
406 | } |
407 | ||
13fe0198 MA |
408 | int |
409 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, | |
b128c09f | 410 | dsl_dataset_t **dsp) |
34dc7c2f | 411 | { |
34dc7c2f BB |
412 | objset_t *mos = dp->dp_meta_objset; |
413 | dmu_buf_t *dbuf; | |
414 | dsl_dataset_t *ds; | |
415 | int err; | |
572e2857 | 416 | dmu_object_info_t doi; |
34dc7c2f | 417 | |
13fe0198 | 418 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
419 | |
420 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 421 | if (err != 0) |
34dc7c2f | 422 | return (err); |
572e2857 BB |
423 | |
424 | /* Make sure dsobj has the correct object type. */ | |
425 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 426 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 427 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 428 | return (SET_ERROR(EINVAL)); |
3a84951d | 429 | } |
572e2857 | 430 | |
34dc7c2f BB |
431 | ds = dmu_buf_get_user(dbuf); |
432 | if (ds == NULL) { | |
d4ed6673 | 433 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 434 | |
79c76d5b | 435 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
436 | ds->ds_dbuf = dbuf; |
437 | ds->ds_object = dsobj; | |
0c66c32d | 438 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 439 | list_link_init(&ds->ds_synced_link); |
34dc7c2f BB |
440 | |
441 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); | |
442 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 443 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
13fe0198 | 444 | refcount_create(&ds->ds_longholds); |
34dc7c2f | 445 | |
428870ff BB |
446 | bplist_create(&ds->ds_pending_deadlist); |
447 | dsl_deadlist_open(&ds->ds_deadlist, | |
d683ddbb | 448 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); |
428870ff | 449 | |
37abac6d BP |
450 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
451 | offsetof(dmu_sendarg_t, dsa_link)); | |
452 | ||
0eb21616 JG |
453 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
454 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
455 | ||
f1512ee6 | 456 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
457 | spa_feature_t f; |
458 | ||
459 | for (f = 0; f < SPA_FEATURES; f++) { | |
460 | if (!(spa_feature_table[f].fi_flags & | |
461 | ZFEATURE_FLAG_PER_DATASET)) | |
462 | continue; | |
463 | err = zap_contains(mos, dsobj, | |
464 | spa_feature_table[f].fi_guid); | |
465 | if (err == 0) { | |
466 | ds->ds_feature_inuse[f] = B_TRUE; | |
467 | } else { | |
468 | ASSERT3U(err, ==, ENOENT); | |
469 | err = 0; | |
470 | } | |
19b3b1d2 | 471 | } |
f1512ee6 MA |
472 | } |
473 | ||
241b5415 MA |
474 | err = dsl_dir_hold_obj(dp, |
475 | dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
13fe0198 | 476 | if (err != 0) { |
34dc7c2f BB |
477 | mutex_destroy(&ds->ds_lock); |
478 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 479 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 480 | refcount_destroy(&ds->ds_longholds); |
428870ff BB |
481 | bplist_destroy(&ds->ds_pending_deadlist); |
482 | dsl_deadlist_close(&ds->ds_deadlist); | |
34dc7c2f BB |
483 | kmem_free(ds, sizeof (dsl_dataset_t)); |
484 | dmu_buf_rele(dbuf, tag); | |
485 | return (err); | |
486 | } | |
487 | ||
0c66c32d | 488 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 489 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 490 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 491 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 492 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 493 | ds, &ds->ds_prev); |
34dc7c2f | 494 | } |
da536844 MA |
495 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
496 | int zaperr = zap_lookup(mos, ds->ds_object, | |
497 | DS_FIELD_BOOKMARK_NAMES, | |
498 | sizeof (ds->ds_bookmarks), 1, | |
499 | &ds->ds_bookmarks); | |
500 | if (zaperr != ENOENT) | |
501 | VERIFY0(zaperr); | |
502 | } | |
45d1cae3 BB |
503 | } else { |
504 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
505 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
506 | if (err == 0 && |
507 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
508 | err = zap_count( |
509 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 510 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
511 | &ds->ds_userrefs); |
512 | } | |
34dc7c2f BB |
513 | } |
514 | ||
0c66c32d | 515 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
516 | err = dsl_prop_get_int_ds(ds, |
517 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
518 | &ds->ds_reserved); | |
34dc7c2f | 519 | if (err == 0) { |
13fe0198 MA |
520 | err = dsl_prop_get_int_ds(ds, |
521 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
522 | &ds->ds_quota); | |
34dc7c2f | 523 | } |
34dc7c2f BB |
524 | } else { |
525 | ds->ds_reserved = ds->ds_quota = 0; | |
526 | } | |
527 | ||
0c66c32d JG |
528 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); |
529 | if (err == 0) | |
530 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
531 | ||
532 | if (err != 0 || winner != NULL) { | |
428870ff BB |
533 | bplist_destroy(&ds->ds_pending_deadlist); |
534 | dsl_deadlist_close(&ds->ds_deadlist); | |
b128c09f | 535 | if (ds->ds_prev) |
13fe0198 MA |
536 | dsl_dataset_rele(ds->ds_prev, ds); |
537 | dsl_dir_rele(ds->ds_dir, ds); | |
34dc7c2f BB |
538 | mutex_destroy(&ds->ds_lock); |
539 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 540 | mutex_destroy(&ds->ds_sendstream_lock); |
13fe0198 | 541 | refcount_destroy(&ds->ds_longholds); |
34dc7c2f | 542 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 543 | if (err != 0) { |
34dc7c2f BB |
544 | dmu_buf_rele(dbuf, tag); |
545 | return (err); | |
546 | } | |
547 | ds = winner; | |
548 | } else { | |
549 | ds->ds_fsid_guid = | |
d683ddbb | 550 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
34dc7c2f BB |
551 | } |
552 | } | |
553 | ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
d683ddbb JG |
554 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
555 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
556 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
557 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f BB |
558 | *dsp = ds; |
559 | return (0); | |
560 | } | |
561 | ||
b128c09f | 562 | int |
13fe0198 | 563 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, |
428870ff | 564 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
565 | { |
566 | dsl_dir_t *dd; | |
b128c09f | 567 | const char *snapname; |
34dc7c2f | 568 | uint64_t obj; |
34dc7c2f | 569 | int err = 0; |
fcff0f35 | 570 | dsl_dataset_t *ds; |
34dc7c2f | 571 | |
13fe0198 MA |
572 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
573 | if (err != 0) | |
34dc7c2f BB |
574 | return (err); |
575 | ||
13fe0198 | 576 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 577 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 | 578 | if (obj != 0) |
fcff0f35 | 579 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
b128c09f | 580 | else |
2e528b49 | 581 | err = SET_ERROR(ENOENT); |
34dc7c2f | 582 | |
b128c09f BB |
583 | /* we may be looking for a snapshot */ |
584 | if (err == 0 && snapname != NULL) { | |
fcff0f35 | 585 | dsl_dataset_t *snap_ds; |
34dc7c2f | 586 | |
b128c09f | 587 | if (*snapname++ != '@') { |
fcff0f35 | 588 | dsl_dataset_rele(ds, tag); |
13fe0198 | 589 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 590 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 591 | } |
34dc7c2f | 592 | |
b128c09f | 593 | dprintf("looking for snapshot '%s'\n", snapname); |
fcff0f35 | 594 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
b128c09f | 595 | if (err == 0) |
fcff0f35 PD |
596 | err = dsl_dataset_hold_obj(dp, obj, tag, &snap_ds); |
597 | dsl_dataset_rele(ds, tag); | |
b128c09f | 598 | |
13fe0198 | 599 | if (err == 0) { |
fcff0f35 PD |
600 | mutex_enter(&snap_ds->ds_lock); |
601 | if (snap_ds->ds_snapname[0] == 0) | |
602 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
603 | sizeof (snap_ds->ds_snapname)); | |
604 | mutex_exit(&snap_ds->ds_lock); | |
605 | ds = snap_ds; | |
34dc7c2f | 606 | } |
34dc7c2f | 607 | } |
fcff0f35 PD |
608 | if (err == 0) |
609 | *dsp = ds; | |
13fe0198 | 610 | dsl_dir_rele(dd, FTAG); |
34dc7c2f BB |
611 | return (err); |
612 | } | |
613 | ||
614 | int | |
13fe0198 | 615 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, |
428870ff | 616 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 617 | { |
13fe0198 MA |
618 | int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); |
619 | if (err != 0) | |
620 | return (err); | |
621 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
622 | dsl_dataset_rele(*dsp, tag); | |
623 | *dsp = NULL; | |
2e528b49 | 624 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
625 | } |
626 | return (0); | |
627 | } | |
628 | ||
629 | int | |
630 | dsl_dataset_own(dsl_pool_t *dp, const char *name, | |
631 | void *tag, dsl_dataset_t **dsp) | |
632 | { | |
633 | int err = dsl_dataset_hold(dp, name, tag, dsp); | |
634 | if (err != 0) | |
b128c09f | 635 | return (err); |
13fe0198 | 636 | if (!dsl_dataset_tryown(*dsp, tag)) { |
428870ff | 637 | dsl_dataset_rele(*dsp, tag); |
2e528b49 | 638 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
639 | } |
640 | return (0); | |
34dc7c2f BB |
641 | } |
642 | ||
13fe0198 MA |
643 | /* |
644 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
645 | * hold is used to prevent destruction of a dataset while the pool hold | |
646 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
647 | * | |
648 | * The dataset and pool must be held when this function is called. After it | |
649 | * is called, the pool hold may be released while the dataset is still held | |
650 | * and accessed. | |
651 | */ | |
652 | void | |
653 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
654 | { | |
655 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
656 | (void) refcount_add(&ds->ds_longholds, tag); | |
657 | } | |
658 | ||
659 | void | |
660 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
661 | { | |
662 | (void) refcount_remove(&ds->ds_longholds, tag); | |
663 | } | |
664 | ||
665 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
666 | boolean_t | |
667 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
668 | { | |
669 | return (!refcount_is_zero(&ds->ds_longholds)); | |
670 | } | |
671 | ||
34dc7c2f BB |
672 | void |
673 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
674 | { | |
675 | if (ds == NULL) { | |
676 | (void) strcpy(name, "mos"); | |
677 | } else { | |
678 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 679 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f | 680 | if (ds->ds_snapname[0]) { |
eca7b760 IK |
681 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
682 | <, ZFS_MAX_DATASET_NAME_LEN); | |
b128c09f BB |
683 | /* |
684 | * We use a "recursive" mutex so that we | |
685 | * can call dprintf_ds() with ds_lock held. | |
686 | */ | |
34dc7c2f | 687 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f | 688 | mutex_enter(&ds->ds_lock); |
eca7b760 IK |
689 | VERIFY3U(strlcat(name, ds->ds_snapname, |
690 | ZFS_MAX_DATASET_NAME_LEN), <, | |
691 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
692 | mutex_exit(&ds->ds_lock); |
693 | } else { | |
eca7b760 IK |
694 | VERIFY3U(strlcat(name, ds->ds_snapname, |
695 | ZFS_MAX_DATASET_NAME_LEN), <, | |
696 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
697 | } |
698 | } | |
699 | } | |
700 | } | |
701 | ||
eca7b760 IK |
702 | int |
703 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
704 | { | |
705 | int len; | |
706 | VERIFY0(dsl_dataset_get_snapname(ds)); | |
707 | mutex_enter(&ds->ds_lock); | |
708 | len = dsl_dir_namelen(ds->ds_dir) + 1 + strlen(ds->ds_snapname); | |
709 | mutex_exit(&ds->ds_lock); | |
710 | return (len); | |
711 | } | |
712 | ||
34dc7c2f | 713 | void |
b128c09f BB |
714 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
715 | { | |
13fe0198 | 716 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
717 | } |
718 | ||
719 | void | |
428870ff | 720 | dsl_dataset_disown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 721 | { |
945dd935 JG |
722 | ASSERT3P(ds->ds_owner, ==, tag); |
723 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 724 | |
34dc7c2f | 725 | mutex_enter(&ds->ds_lock); |
b128c09f | 726 | ds->ds_owner = NULL; |
34dc7c2f | 727 | mutex_exit(&ds->ds_lock); |
13fe0198 | 728 | dsl_dataset_long_rele(ds, tag); |
945dd935 | 729 | dsl_dataset_rele(ds, tag); |
34dc7c2f BB |
730 | } |
731 | ||
732 | boolean_t | |
13fe0198 | 733 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 734 | { |
b128c09f BB |
735 | boolean_t gotit = FALSE; |
736 | ||
47dfff3b | 737 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
34dc7c2f | 738 | mutex_enter(&ds->ds_lock); |
13fe0198 | 739 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 740 | ds->ds_owner = tag; |
13fe0198 | 741 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 742 | gotit = TRUE; |
34dc7c2f BB |
743 | } |
744 | mutex_exit(&ds->ds_lock); | |
b128c09f | 745 | return (gotit); |
34dc7c2f BB |
746 | } |
747 | ||
47dfff3b MA |
748 | boolean_t |
749 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
750 | { | |
751 | boolean_t rv; | |
752 | mutex_enter(&ds->ds_lock); | |
753 | rv = (ds->ds_owner != NULL); | |
754 | mutex_exit(&ds->ds_lock); | |
755 | return (rv); | |
756 | } | |
757 | ||
241b5415 MA |
758 | static void |
759 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
760 | { | |
761 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
762 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
763 | uint64_t zero = 0; | |
764 | ||
765 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
766 | ||
767 | spa_feature_incr(spa, f, tx); | |
768 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
769 | ||
770 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
771 | sizeof (zero), 1, &zero, tx)); | |
772 | } | |
773 | ||
774 | void | |
775 | dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) | |
776 | { | |
777 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
778 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
779 | ||
780 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
781 | ||
782 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
783 | spa_feature_decr(spa, f, tx); | |
784 | } | |
785 | ||
34dc7c2f | 786 | uint64_t |
b128c09f | 787 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
34dc7c2f BB |
788 | uint64_t flags, dmu_tx_t *tx) |
789 | { | |
790 | dsl_pool_t *dp = dd->dd_pool; | |
791 | dmu_buf_t *dbuf; | |
792 | dsl_dataset_phys_t *dsphys; | |
793 | uint64_t dsobj; | |
794 | objset_t *mos = dp->dp_meta_objset; | |
795 | ||
b128c09f BB |
796 | if (origin == NULL) |
797 | origin = dp->dp_origin_snap; | |
798 | ||
34dc7c2f | 799 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 800 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 801 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 802 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
803 | |
804 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
805 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 806 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
807 | dmu_buf_will_dirty(dbuf, tx); |
808 | dsphys = dbuf->db_data; | |
b128c09f | 809 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
810 | dsphys->ds_dir_obj = dd->dd_object; |
811 | dsphys->ds_flags = flags; | |
812 | dsphys->ds_fsid_guid = unique_create(); | |
813 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
814 | sizeof (dsphys->ds_guid)); | |
815 | dsphys->ds_snapnames_zapobj = | |
816 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
817 | DMU_OT_NONE, 0, tx); | |
818 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 819 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 820 | |
428870ff BB |
821 | if (origin == NULL) { |
822 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
823 | } else { | |
241b5415 | 824 | spa_feature_t f; |
13fe0198 | 825 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 826 | |
34dc7c2f BB |
827 | dsphys->ds_prev_snap_obj = origin->ds_object; |
828 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 829 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 830 | dsphys->ds_referenced_bytes = |
d683ddbb | 831 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 832 | dsphys->ds_compressed_bytes = |
d683ddbb | 833 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 834 | dsphys->ds_uncompressed_bytes = |
d683ddbb JG |
835 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
836 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; | |
4b20a6f5 MA |
837 | |
838 | /* | |
839 | * Inherit flags that describe the dataset's contents | |
840 | * (INCONSISTENT) or properties (Case Insensitive). | |
841 | */ | |
d683ddbb | 842 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 843 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 844 | |
241b5415 MA |
845 | for (f = 0; f < SPA_FEATURES; f++) { |
846 | if (origin->ds_feature_inuse[f]) | |
847 | dsl_dataset_activate_feature(dsobj, f, tx); | |
848 | } | |
f1512ee6 | 849 | |
34dc7c2f | 850 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 851 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 852 | |
13fe0198 | 853 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
854 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
855 | FTAG, &ohds)); | |
428870ff BB |
856 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
857 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
858 | dsl_dataset_rele(ohds, FTAG); | |
859 | ||
b128c09f | 860 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
861 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
862 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
863 | zap_create(mos, |
864 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
865 | } | |
13fe0198 | 866 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
867 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
868 | dsobj, tx)); | |
b128c09f BB |
869 | } |
870 | ||
34dc7c2f | 871 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 872 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 873 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 874 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 875 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 876 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
877 | zap_create(mos, |
878 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
879 | } | |
13fe0198 | 880 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
881 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
882 | dsobj, tx)); | |
428870ff | 883 | } |
34dc7c2f BB |
884 | } |
885 | ||
886 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) | |
887 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
888 | ||
889 | dmu_buf_rele(dbuf, FTAG); | |
890 | ||
891 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 892 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
893 | |
894 | return (dsobj); | |
895 | } | |
896 | ||
13fe0198 MA |
897 | static void |
898 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
899 | { | |
900 | objset_t *os; | |
901 | ||
902 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
903 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
904 | dsl_dataset_dirty(ds, tx); | |
905 | } | |
906 | ||
34dc7c2f BB |
907 | uint64_t |
908 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
909 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) | |
910 | { | |
911 | dsl_pool_t *dp = pdd->dd_pool; | |
912 | uint64_t dsobj, ddobj; | |
913 | dsl_dir_t *dd; | |
914 | ||
13fe0198 | 915 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
916 | ASSERT(lastname[0] != '@'); |
917 | ||
b128c09f | 918 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 919 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 920 | |
13fe0198 MA |
921 | dsobj = dsl_dataset_create_sync_dd(dd, origin, |
922 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); | |
34dc7c2f BB |
923 | |
924 | dsl_deleg_set_create_perms(dd, tx, cr); | |
925 | ||
788eb90c JJ |
926 | /* |
927 | * Since we're creating a new node we know it's a leaf, so we can | |
928 | * initialize the counts if the limit feature is active. | |
929 | */ | |
930 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
931 | uint64_t cnt = 0; | |
932 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
933 | ||
934 | dsl_dir_zapify(dd, tx); | |
935 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
936 | sizeof (cnt), 1, &cnt, tx)); | |
937 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
938 | sizeof (cnt), 1, &cnt, tx)); | |
939 | } | |
940 | ||
13fe0198 | 941 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 942 | |
572e2857 BB |
943 | /* |
944 | * If we are creating a clone, make sure we zero out any stale | |
945 | * data from the origin snapshots zil header. | |
946 | */ | |
13fe0198 | 947 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 948 | dsl_dataset_t *ds; |
572e2857 | 949 | |
13fe0198 MA |
950 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
951 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
952 | dsl_dataset_rele(ds, FTAG); |
953 | } | |
954 | ||
34dc7c2f BB |
955 | return (dsobj); |
956 | } | |
957 | ||
34dc7c2f | 958 | /* |
13fe0198 MA |
959 | * The unique space in the head dataset can be calculated by subtracting |
960 | * the space used in the most recent snapshot, that is still being used | |
961 | * in this file system, from the space currently in use. To figure out | |
962 | * the space in the most recent snapshot still in use, we need to take | |
963 | * the total space used in the snapshot and subtract out the space that | |
964 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 965 | */ |
13fe0198 MA |
966 | void |
967 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 968 | { |
13fe0198 MA |
969 | uint64_t mrs_used; |
970 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 971 | |
0c66c32d | 972 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 973 | |
d683ddbb JG |
974 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
975 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
976 | else |
977 | mrs_used = 0; | |
45d1cae3 | 978 | |
13fe0198 | 979 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 980 | |
13fe0198 | 981 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
982 | dsl_dataset_phys(ds)->ds_unique_bytes = |
983 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 984 | |
13fe0198 MA |
985 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
986 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 987 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
988 | } |
989 | ||
13fe0198 MA |
990 | void |
991 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
992 | dmu_tx_t *tx) | |
45d1cae3 | 993 | { |
13fe0198 MA |
994 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
995 | int err; | |
996 | ASSERTV(uint64_t count); | |
997 | ||
d683ddbb JG |
998 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
999 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1000 | obj, tx); | |
13fe0198 MA |
1001 | /* |
1002 | * The err should not be ENOENT, but a bug in a previous version | |
1003 | * of the code could cause upgrade_clones_cb() to not set | |
1004 | * ds_next_snap_obj when it should, leading to a missing entry. | |
1005 | * If we knew that the pool was created after | |
1006 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
1007 | * ENOENT. However, at least we can check that we don't have | |
1008 | * too many entries in the next_clones_obj even after failing to | |
1009 | * remove this one. | |
1010 | */ | |
1011 | if (err != ENOENT) | |
1012 | VERIFY0(err); | |
d683ddbb | 1013 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 1014 | &count)); |
d683ddbb | 1015 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 1016 | } |
45d1cae3 | 1017 | |
45d1cae3 | 1018 | |
13fe0198 MA |
1019 | blkptr_t * |
1020 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1021 | { | |
d683ddbb | 1022 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
1023 | } |
1024 | ||
13fe0198 MA |
1025 | void |
1026 | dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
45d1cae3 | 1027 | { |
13fe0198 MA |
1028 | ASSERT(dmu_tx_is_syncing(tx)); |
1029 | /* If it's the meta-objset, set dp_meta_rootbp */ | |
1030 | if (ds == NULL) { | |
1031 | tx->tx_pool->dp_meta_rootbp = *bp; | |
1032 | } else { | |
1033 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1034 | dsl_dataset_phys(ds)->ds_bp = *bp; |
45d1cae3 | 1035 | } |
13fe0198 | 1036 | } |
45d1cae3 | 1037 | |
13fe0198 MA |
1038 | spa_t * |
1039 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1040 | { | |
1041 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
1042 | } |
1043 | ||
13fe0198 MA |
1044 | void |
1045 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 1046 | { |
13fe0198 | 1047 | dsl_pool_t *dp; |
45d1cae3 | 1048 | |
13fe0198 MA |
1049 | if (ds == NULL) /* this is the meta-objset */ |
1050 | return; | |
34dc7c2f | 1051 | |
428870ff | 1052 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1053 | |
d683ddbb | 1054 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1055 | panic("dirtying snapshot!"); |
1056 | ||
1057 | dp = ds->ds_dir->dd_pool; | |
1058 | ||
13fe0198 | 1059 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
34dc7c2f BB |
1060 | /* up the hold count until we can be written out */ |
1061 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1062 | } | |
1063 | } | |
1064 | ||
04434775 MA |
1065 | boolean_t |
1066 | dsl_dataset_is_dirty(dsl_dataset_t *ds) | |
1067 | { | |
1068 | int t; | |
1069 | ||
1070 | for (t = 0; t < TXG_SIZE; t++) { | |
1071 | if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1072 | ds, t)) | |
1073 | return (B_TRUE); | |
1074 | } | |
1075 | return (B_FALSE); | |
1076 | } | |
1077 | ||
34dc7c2f | 1078 | static int |
13fe0198 | 1079 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1080 | { |
13fe0198 | 1081 | uint64_t asize; |
34dc7c2f | 1082 | |
13fe0198 | 1083 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1084 | return (0); |
1085 | ||
34dc7c2f | 1086 | /* |
13fe0198 MA |
1087 | * If there's an fs-only reservation, any blocks that might become |
1088 | * owned by the snapshot dataset must be accommodated by space | |
1089 | * outside of the reservation. | |
34dc7c2f | 1090 | */ |
13fe0198 | 1091 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1092 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1093 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1094 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1095 | |
1096 | /* | |
13fe0198 MA |
1097 | * Propagate any reserved space for this snapshot to other |
1098 | * snapshot checks in this sync group. | |
34dc7c2f | 1099 | */ |
13fe0198 MA |
1100 | if (asize > 0) |
1101 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1102 | |
1103 | return (0); | |
1104 | } | |
1105 | ||
13fe0198 MA |
1106 | typedef struct dsl_dataset_snapshot_arg { |
1107 | nvlist_t *ddsa_snaps; | |
1108 | nvlist_t *ddsa_props; | |
1109 | nvlist_t *ddsa_errors; | |
788eb90c | 1110 | cred_t *ddsa_cr; |
13fe0198 | 1111 | } dsl_dataset_snapshot_arg_t; |
45d1cae3 | 1112 | |
34dc7c2f | 1113 | int |
13fe0198 | 1114 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1115 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1116 | { |
13fe0198 MA |
1117 | int error; |
1118 | uint64_t value; | |
34dc7c2f | 1119 | |
13fe0198 | 1120 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1121 | |
13fe0198 | 1122 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1123 | return (0); |
34dc7c2f BB |
1124 | |
1125 | /* | |
13fe0198 MA |
1126 | * We don't allow multiple snapshots of the same txg. If there |
1127 | * is already one, try again. | |
34dc7c2f | 1128 | */ |
d683ddbb | 1129 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1130 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1131 | |
1132 | /* | |
13fe0198 | 1133 | * Check for conflicting snapshot name. |
34dc7c2f | 1134 | */ |
13fe0198 MA |
1135 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1136 | if (error == 0) | |
2e528b49 | 1137 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1138 | if (error != ENOENT) |
1139 | return (error); | |
45d1cae3 | 1140 | |
96c2e961 KW |
1141 | /* |
1142 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1143 | * those into which we are currently receiving. However, if we are | |
1144 | * creating this snapshot as part of a receive, this check will be | |
1145 | * executed atomically with respect to the completion of the receive | |
1146 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1147 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1148 | * dmu_recv_end_sync(). | |
1149 | */ | |
1150 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1151 | return (SET_ERROR(EBUSY)); | |
1152 | ||
788eb90c JJ |
1153 | /* |
1154 | * Skip the check for temporary snapshots or if we have already checked | |
1155 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1156 | * check the count here when we're receiving a stream. | |
1157 | */ | |
1158 | if (cnt != 0 && cr != NULL) { | |
1159 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1160 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1161 | if (error != 0) | |
1162 | return (error); | |
1163 | } | |
1164 | ||
13fe0198 MA |
1165 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1166 | if (error != 0) | |
1167 | return (error); | |
45d1cae3 | 1168 | |
34dc7c2f BB |
1169 | return (0); |
1170 | } | |
1171 | ||
13fe0198 MA |
1172 | static int |
1173 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) | |
b128c09f | 1174 | { |
13fe0198 MA |
1175 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1176 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1177 | nvpair_t *pair; | |
1178 | int rv = 0; | |
b128c09f | 1179 | |
788eb90c JJ |
1180 | /* |
1181 | * Pre-compute how many total new snapshots will be created for each | |
1182 | * level in the tree and below. This is needed for validating the | |
1183 | * snapshot limit when either taking a recursive snapshot or when | |
1184 | * taking multiple snapshots. | |
1185 | * | |
1186 | * The problem is that the counts are not actually adjusted when | |
1187 | * we are checking, only when we finally sync. For a single snapshot, | |
1188 | * this is easy, the count will increase by 1 at each node up the tree, | |
1189 | * but its more complicated for the recursive/multiple snapshot case. | |
1190 | * | |
1191 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1192 | * at each level up the tree but since it is validating each snapshot | |
1193 | * independently we need to be sure that we are validating the complete | |
1194 | * count for the entire set of snapshots. We do this by rolling up the | |
1195 | * counts for each component of the name into an nvlist and then | |
1196 | * checking each of those cases with the aggregated count. | |
1197 | * | |
1198 | * This approach properly handles not only the recursive snapshot | |
1199 | * case (where we get all of those on the ddsa_snaps list) but also | |
1200 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1201 | * validate the limit on 'a' using a count of 2). | |
1202 | * | |
1203 | * We validate the snapshot names in the third loop and only report | |
1204 | * name errors once. | |
1205 | */ | |
1206 | if (dmu_tx_is_syncing(tx)) { | |
1207 | char *nm; | |
1208 | nvlist_t *cnt_track = NULL; | |
1209 | cnt_track = fnvlist_alloc(); | |
1210 | ||
1211 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1212 | ||
1213 | /* Rollup aggregated counts into the cnt_track list */ | |
1214 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1215 | pair != NULL; | |
1216 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1217 | char *pdelim; | |
1218 | uint64_t val; | |
1219 | ||
1220 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1221 | pdelim = strchr(nm, '@'); | |
1222 | if (pdelim == NULL) | |
1223 | continue; | |
1224 | *pdelim = '\0'; | |
1225 | ||
1226 | do { | |
1227 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1228 | &val) == 0) { | |
1229 | /* update existing entry */ | |
1230 | fnvlist_add_uint64(cnt_track, nm, | |
1231 | val + 1); | |
1232 | } else { | |
1233 | /* add to list */ | |
1234 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1235 | } | |
1236 | ||
1237 | pdelim = strrchr(nm, '/'); | |
1238 | if (pdelim != NULL) | |
1239 | *pdelim = '\0'; | |
1240 | } while (pdelim != NULL); | |
1241 | } | |
1242 | ||
1243 | kmem_free(nm, MAXPATHLEN); | |
1244 | ||
1245 | /* Check aggregated counts at each level */ | |
1246 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1247 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1248 | int error = 0; | |
1249 | char *name; | |
1250 | uint64_t cnt = 0; | |
1251 | dsl_dataset_t *ds; | |
1252 | ||
1253 | name = nvpair_name(pair); | |
1254 | cnt = fnvpair_value_uint64(pair); | |
1255 | ASSERT(cnt > 0); | |
1256 | ||
1257 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1258 | if (error == 0) { | |
1259 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1260 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1261 | ddsa->ddsa_cr); | |
1262 | dsl_dataset_rele(ds, FTAG); | |
1263 | } | |
1264 | ||
1265 | if (error != 0) { | |
1266 | if (ddsa->ddsa_errors != NULL) | |
1267 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1268 | name, error); | |
1269 | rv = error; | |
1270 | /* only report one error for this check */ | |
1271 | break; | |
1272 | } | |
1273 | } | |
1274 | nvlist_free(cnt_track); | |
1275 | } | |
1276 | ||
13fe0198 MA |
1277 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1278 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1279 | int error = 0; | |
1280 | dsl_dataset_t *ds; | |
689f093e | 1281 | char *name, *atp = NULL; |
eca7b760 | 1282 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1283 | |
1284 | name = nvpair_name(pair); | |
eca7b760 | 1285 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 1286 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1287 | if (error == 0) { |
1288 | atp = strchr(name, '@'); | |
1289 | if (atp == NULL) | |
2e528b49 | 1290 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1291 | if (error == 0) |
1292 | (void) strlcpy(dsname, name, atp - name + 1); | |
1293 | } | |
1294 | if (error == 0) | |
1295 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1296 | if (error == 0) { | |
788eb90c | 1297 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1298 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1299 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1300 | dsl_dataset_rele(ds, FTAG); |
1301 | } | |
b128c09f | 1302 | |
13fe0198 MA |
1303 | if (error != 0) { |
1304 | if (ddsa->ddsa_errors != NULL) { | |
1305 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1306 | name, error); | |
1307 | } | |
1308 | rv = error; | |
1309 | } | |
1310 | } | |
788eb90c | 1311 | |
13fe0198 | 1312 | return (rv); |
b128c09f BB |
1313 | } |
1314 | ||
13fe0198 MA |
1315 | void |
1316 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1317 | dmu_tx_t *tx) | |
428870ff | 1318 | { |
13fe0198 MA |
1319 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1320 | dmu_buf_t *dbuf; | |
1321 | dsl_dataset_phys_t *dsphys; | |
1322 | uint64_t dsobj, crtxg; | |
1323 | objset_t *mos = dp->dp_meta_objset; | |
241b5415 | 1324 | spa_feature_t f; |
13fe0198 MA |
1325 | ASSERTV(static zil_header_t zero_zil); |
1326 | ASSERTV(objset_t *os); | |
1327 | ||
1328 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1329 | |
428870ff | 1330 | /* |
13fe0198 MA |
1331 | * If we are on an old pool, the zil must not be active, in which |
1332 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1333 | */ |
13fe0198 MA |
1334 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1335 | dmu_objset_from_ds(ds, &os) != 0 || | |
1336 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1337 | sizeof (zero_zil)) == 0); | |
428870ff | 1338 | |
788eb90c | 1339 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1340 | |
1341 | /* | |
13fe0198 | 1342 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1343 | */ |
1344 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1345 | crtxg = 1; | |
1346 | else | |
1347 | crtxg = tx->tx_txg; | |
1348 | ||
34dc7c2f BB |
1349 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1350 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1351 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1352 | dmu_buf_will_dirty(dbuf, tx); |
1353 | dsphys = dbuf->db_data; | |
b128c09f | 1354 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1355 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1356 | dsphys->ds_fsid_guid = unique_create(); | |
1357 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1358 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1359 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1360 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1361 | dsphys->ds_next_snap_obj = ds->ds_object; |
1362 | dsphys->ds_num_children = 1; | |
1363 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1364 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1365 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1366 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1367 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1368 | dsphys->ds_uncompressed_bytes = | |
1369 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1370 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
1371 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; | |
34dc7c2f BB |
1372 | dmu_buf_rele(dbuf, FTAG); |
1373 | ||
241b5415 MA |
1374 | for (f = 0; f < SPA_FEATURES; f++) { |
1375 | if (ds->ds_feature_inuse[f]) | |
1376 | dsl_dataset_activate_feature(dsobj, f, tx); | |
1377 | } | |
f1512ee6 | 1378 | |
d683ddbb JG |
1379 | ASSERT3U(ds->ds_prev != 0, ==, |
1380 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1381 | if (ds->ds_prev) { |
b128c09f | 1382 | uint64_t next_clones_obj = |
d683ddbb JG |
1383 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1384 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1385 | ds->ds_object || |
d683ddbb JG |
1386 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1387 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1388 | ds->ds_object) { | |
34dc7c2f | 1389 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1390 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1391 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1392 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1393 | } else if (next_clones_obj != 0) { |
13fe0198 | 1394 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1395 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1396 | VERIFY0(zap_add_int(mos, |
b128c09f | 1397 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1398 | } |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * If we have a reference-reservation on this dataset, we will | |
1403 | * need to increase the amount of refreservation being charged | |
1404 | * since our unique space is going to zero. | |
1405 | */ | |
1406 | if (ds->ds_reserved) { | |
428870ff BB |
1407 | int64_t delta; |
1408 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1409 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1410 | ds->ds_reserved); | |
b128c09f | 1411 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1412 | delta, 0, 0, tx); |
34dc7c2f BB |
1413 | } |
1414 | ||
34dc7c2f | 1415 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1416 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1417 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1418 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1419 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1420 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1421 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1422 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1423 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1424 | |
d683ddbb JG |
1425 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1426 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1427 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1428 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
34dc7c2f | 1429 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1430 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1431 | |
d683ddbb | 1432 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1433 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1434 | |
1435 | if (ds->ds_prev) | |
13fe0198 MA |
1436 | dsl_dataset_rele(ds->ds_prev, ds); |
1437 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1438 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1439 | |
428870ff BB |
1440 | dsl_scan_ds_snapshotted(ds, tx); |
1441 | ||
1442 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1443 | |
6f1ffb06 | 1444 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1445 | } |
1446 | ||
13fe0198 MA |
1447 | static void |
1448 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 1449 | { |
13fe0198 MA |
1450 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1451 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1452 | nvpair_t *pair; | |
34dc7c2f | 1453 | |
13fe0198 MA |
1454 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1455 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1456 | dsl_dataset_t *ds; | |
1457 | char *name, *atp; | |
eca7b760 | 1458 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1459 | |
1460 | name = nvpair_name(pair); | |
1461 | atp = strchr(name, '@'); | |
1462 | (void) strlcpy(dsname, name, atp - name + 1); | |
1463 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1464 | ||
1465 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1466 | if (ddsa->ddsa_props != NULL) { | |
1467 | dsl_props_set_sync_impl(ds->ds_prev, | |
1468 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1469 | } | |
a0bd735a | 1470 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
1471 | dsl_dataset_rele(ds, FTAG); |
1472 | } | |
34dc7c2f BB |
1473 | } |
1474 | ||
13fe0198 MA |
1475 | /* |
1476 | * The snapshots must all be in the same pool. | |
1477 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1478 | */ | |
1479 | int | |
1480 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1481 | { |
13fe0198 MA |
1482 | dsl_dataset_snapshot_arg_t ddsa; |
1483 | nvpair_t *pair; | |
1484 | boolean_t needsuspend; | |
1485 | int error; | |
1486 | spa_t *spa; | |
1487 | char *firstname; | |
1488 | nvlist_t *suspended = NULL; | |
330d06f9 | 1489 | |
13fe0198 MA |
1490 | pair = nvlist_next_nvpair(snaps, NULL); |
1491 | if (pair == NULL) | |
1492 | return (0); | |
1493 | firstname = nvpair_name(pair); | |
1494 | ||
1495 | error = spa_open(firstname, &spa, FTAG); | |
1496 | if (error != 0) | |
1497 | return (error); | |
1498 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1499 | spa_close(spa, FTAG); | |
1500 | ||
1501 | if (needsuspend) { | |
1502 | suspended = fnvlist_alloc(); | |
1503 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1504 | pair = nvlist_next_nvpair(snaps, pair)) { | |
eca7b760 | 1505 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1506 | char *snapname = nvpair_name(pair); |
1507 | char *atp; | |
1508 | void *cookie; | |
1509 | ||
1510 | atp = strchr(snapname, '@'); | |
1511 | if (atp == NULL) { | |
2e528b49 | 1512 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1513 | break; |
1514 | } | |
1515 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1516 | ||
1517 | error = zil_suspend(fsname, &cookie); | |
1518 | if (error != 0) | |
1519 | break; | |
1520 | fnvlist_add_uint64(suspended, fsname, | |
1521 | (uintptr_t)cookie); | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | ddsa.ddsa_snaps = snaps; | |
1526 | ddsa.ddsa_props = props; | |
1527 | ddsa.ddsa_errors = errors; | |
788eb90c | 1528 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1529 | |
1530 | if (error == 0) { | |
1531 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1532 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1533 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1534 | } |
1535 | ||
1536 | if (suspended != NULL) { | |
1537 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1538 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1539 | zil_resume((void *)(uintptr_t) | |
1540 | fnvpair_value_uint64(pair)); | |
1541 | } | |
1542 | fnvlist_free(suspended); | |
1543 | } | |
1544 | ||
1545 | return (error); | |
1546 | } | |
1547 | ||
1548 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1549 | const char *ddsta_fsname; | |
1550 | const char *ddsta_snapname; | |
1551 | minor_t ddsta_cleanup_minor; | |
1552 | const char *ddsta_htag; | |
1553 | } dsl_dataset_snapshot_tmp_arg_t; | |
1554 | ||
1555 | static int | |
1556 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1557 | { | |
1558 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1559 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1560 | dsl_dataset_t *ds; | |
1561 | int error; | |
1562 | ||
1563 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1564 | if (error != 0) | |
1565 | return (error); | |
1566 | ||
788eb90c | 1567 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1568 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1569 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1570 | if (error != 0) { |
1571 | dsl_dataset_rele(ds, FTAG); | |
1572 | return (error); | |
1573 | } | |
1574 | ||
1575 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1576 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1577 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1578 | } |
1579 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1580 | B_TRUE, tx); | |
1581 | if (error != 0) { | |
1582 | dsl_dataset_rele(ds, FTAG); | |
1583 | return (error); | |
1584 | } | |
1585 | ||
1586 | dsl_dataset_rele(ds, FTAG); | |
1587 | return (0); | |
1588 | } | |
1589 | ||
1590 | static void | |
1591 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1592 | { | |
1593 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1594 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 1595 | dsl_dataset_t *ds = NULL; |
13fe0198 MA |
1596 | |
1597 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1598 | ||
1599 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1600 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1601 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1602 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1603 | ||
1604 | dsl_dataset_rele(ds, FTAG); | |
1605 | } | |
1606 | ||
1607 | int | |
1608 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1609 | minor_t cleanup_minor, const char *htag) | |
1610 | { | |
1611 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1612 | int error; | |
1613 | spa_t *spa; | |
1614 | boolean_t needsuspend; | |
1615 | void *cookie; | |
1616 | ||
1617 | ddsta.ddsta_fsname = fsname; | |
1618 | ddsta.ddsta_snapname = snapname; | |
1619 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1620 | ddsta.ddsta_htag = htag; | |
1621 | ||
1622 | error = spa_open(fsname, &spa, FTAG); | |
1623 | if (error != 0) | |
1624 | return (error); | |
1625 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1626 | spa_close(spa, FTAG); | |
1627 | ||
1628 | if (needsuspend) { | |
1629 | error = zil_suspend(fsname, &cookie); | |
1630 | if (error != 0) | |
1631 | return (error); | |
1632 | } | |
1633 | ||
1634 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1635 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1636 | |
1637 | if (needsuspend) | |
1638 | zil_resume(cookie); | |
1639 | return (error); | |
1640 | } | |
1641 | ||
1642 | ||
1643 | void | |
1644 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1645 | { | |
241b5415 MA |
1646 | spa_feature_t f; |
1647 | ||
13fe0198 MA |
1648 | ASSERT(dmu_tx_is_syncing(tx)); |
1649 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1650 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1651 | |
1652 | /* | |
1653 | * in case we had to change ds_fsid_guid when we opened it, | |
1654 | * sync it out now. | |
1655 | */ | |
1656 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1657 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 | 1658 | |
47dfff3b MA |
1659 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
1660 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1661 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
1662 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
1663 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1664 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
1665 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
1666 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1667 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
1668 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
1669 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
1670 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
1671 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
1672 | } | |
1673 | ||
13fe0198 | 1674 | dmu_objset_sync(ds->ds_objset, zio, tx); |
f1512ee6 | 1675 | |
241b5415 MA |
1676 | for (f = 0; f < SPA_FEATURES; f++) { |
1677 | if (ds->ds_feature_activation_needed[f]) { | |
1678 | if (ds->ds_feature_inuse[f]) | |
1679 | continue; | |
1680 | dsl_dataset_activate_feature(ds->ds_object, f, tx); | |
1681 | ds->ds_feature_inuse[f] = B_TRUE; | |
1682 | } | |
f1512ee6 | 1683 | } |
13fe0198 MA |
1684 | } |
1685 | ||
1686 | static void | |
1687 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
1688 | { | |
1689 | uint64_t count = 0; | |
1690 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1691 | zap_cursor_t zc; | |
1692 | zap_attribute_t za; | |
1693 | nvlist_t *propval = fnvlist_alloc(); | |
1694 | nvlist_t *val = fnvlist_alloc(); | |
1695 | ||
1696 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
1697 | |
1698 | /* | |
13fe0198 | 1699 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
1700 | * due to a bug in a previous version of the code. |
1701 | * Only trust it if it has the right number of entries. | |
1702 | */ | |
d683ddbb JG |
1703 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
1704 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
1705 | &count)); |
1706 | } | |
d683ddbb | 1707 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) |
330d06f9 | 1708 | goto fail; |
d683ddbb JG |
1709 | for (zap_cursor_init(&zc, mos, |
1710 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
1711 | zap_cursor_retrieve(&zc, &za) == 0; |
1712 | zap_cursor_advance(&zc)) { | |
1713 | dsl_dataset_t *clone; | |
eca7b760 | 1714 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1715 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
1716 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 1717 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 1718 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
1719 | dsl_dataset_rele(clone, FTAG); |
1720 | } | |
1721 | zap_cursor_fini(&zc); | |
13fe0198 MA |
1722 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); |
1723 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); | |
330d06f9 MA |
1724 | fail: |
1725 | nvlist_free(val); | |
1726 | nvlist_free(propval); | |
330d06f9 MA |
1727 | } |
1728 | ||
47dfff3b MA |
1729 | static void |
1730 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1731 | { | |
1732 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1733 | ||
1734 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
1735 | char *str; | |
1736 | void *packed; | |
1737 | uint8_t *compressed; | |
1738 | uint64_t val; | |
1739 | nvlist_t *token_nv = fnvlist_alloc(); | |
1740 | size_t packed_size, compressed_size; | |
1741 | zio_cksum_t cksum; | |
1742 | char *propval; | |
1743 | char buf[MAXNAMELEN]; | |
1744 | int i; | |
1745 | ||
1746 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1747 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
1748 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
1749 | } | |
1750 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1751 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
1752 | fnvlist_add_uint64(token_nv, "object", val); | |
1753 | } | |
1754 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1755 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
1756 | fnvlist_add_uint64(token_nv, "offset", val); | |
1757 | } | |
1758 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1759 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
1760 | fnvlist_add_uint64(token_nv, "bytes", val); | |
1761 | } | |
1762 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1763 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
1764 | fnvlist_add_uint64(token_nv, "toguid", val); | |
1765 | } | |
1766 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1767 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
1768 | fnvlist_add_string(token_nv, "toname", buf); | |
1769 | } | |
2aa34383 DK |
1770 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1771 | DS_FIELD_RESUME_LARGEBLOCK) == 0) { | |
1772 | fnvlist_add_boolean(token_nv, "largeblockok"); | |
1773 | } | |
47dfff3b MA |
1774 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1775 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
1776 | fnvlist_add_boolean(token_nv, "embedok"); | |
1777 | } | |
2aa34383 DK |
1778 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
1779 | DS_FIELD_RESUME_COMPRESSOK) == 0) { | |
1780 | fnvlist_add_boolean(token_nv, "compressok"); | |
1781 | } | |
47dfff3b MA |
1782 | packed = fnvlist_pack(token_nv, &packed_size); |
1783 | fnvlist_free(token_nv); | |
1784 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
1785 | ||
1786 | compressed_size = gzip_compress(packed, compressed, | |
1787 | packed_size, packed_size, 6); | |
1788 | ||
fc897b24 | 1789 | fletcher_4_native_varsize(compressed, compressed_size, &cksum); |
47dfff3b MA |
1790 | |
1791 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1792 | for (i = 0; i < compressed_size; i++) { | |
1793 | (void) sprintf(str + i * 2, "%02x", compressed[i]); | |
1794 | } | |
1795 | str[compressed_size * 2] = '\0'; | |
1796 | propval = kmem_asprintf("%u-%llx-%llx-%s", | |
1797 | ZFS_SEND_RESUME_TOKEN_VERSION, | |
1798 | (longlong_t)cksum.zc_word[0], | |
1799 | (longlong_t)packed_size, str); | |
1800 | dsl_prop_nvlist_add_string(nv, | |
1801 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
1802 | kmem_free(packed, packed_size); | |
1803 | kmem_free(str, compressed_size * 2 + 1); | |
1804 | kmem_free(compressed, packed_size); | |
1805 | strfree(propval); | |
1806 | } | |
1807 | } | |
1808 | ||
34dc7c2f BB |
1809 | void |
1810 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
1811 | { | |
b858767a | 1812 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
f5fc4aca | 1813 | uint64_t refd, avail, uobjs, aobjs, ratio; |
13fe0198 MA |
1814 | |
1815 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 1816 | |
d683ddbb JG |
1817 | ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : |
1818 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
1819 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
6f1ffb06 MA |
1820 | |
1821 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); | |
24a64651 | 1822 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d683ddbb | 1823 | dsl_dataset_phys(ds)->ds_uncompressed_bytes); |
6f1ffb06 | 1824 | |
0c66c32d | 1825 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
1826 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); |
1827 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
d683ddbb | 1828 | dsl_dataset_phys(ds)->ds_unique_bytes); |
6f1ffb06 MA |
1829 | get_clones_stat(ds, nv); |
1830 | } else { | |
1715493f | 1831 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { |
eca7b760 | 1832 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
1715493f MA |
1833 | dsl_dataset_name(ds->ds_prev, buf); |
1834 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); | |
1835 | } | |
1836 | ||
6f1ffb06 MA |
1837 | dsl_dir_stats(ds->ds_dir, nv); |
1838 | } | |
34dc7c2f BB |
1839 | |
1840 | dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); | |
1841 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); | |
1842 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); | |
1843 | ||
1844 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, | |
d683ddbb | 1845 | dsl_dataset_phys(ds)->ds_creation_time); |
34dc7c2f | 1846 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d683ddbb | 1847 | dsl_dataset_phys(ds)->ds_creation_txg); |
34dc7c2f BB |
1848 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
1849 | ds->ds_quota); | |
1850 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, | |
1851 | ds->ds_reserved); | |
b128c09f | 1852 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d683ddbb | 1853 | dsl_dataset_phys(ds)->ds_guid); |
428870ff | 1854 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d683ddbb | 1855 | dsl_dataset_phys(ds)->ds_unique_bytes); |
428870ff BB |
1856 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
1857 | ds->ds_object); | |
1858 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, | |
1859 | ds->ds_userrefs); | |
45d1cae3 BB |
1860 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
1861 | DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
34dc7c2f | 1862 | |
d683ddbb | 1863 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
330d06f9 MA |
1864 | uint64_t written, comp, uncomp; |
1865 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1866 | dsl_dataset_t *prev; | |
1867 | int err; | |
1868 | ||
330d06f9 | 1869 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 1870 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); |
330d06f9 MA |
1871 | if (err == 0) { |
1872 | err = dsl_dataset_space_written(prev, ds, &written, | |
1873 | &comp, &uncomp); | |
1874 | dsl_dataset_rele(prev, FTAG); | |
1875 | if (err == 0) { | |
1876 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
1877 | written); | |
1878 | } | |
1879 | } | |
1880 | } | |
1881 | ||
47dfff3b | 1882 | if (!dsl_dataset_is_snapshot(ds)) { |
eca7b760 IK |
1883 | /* 6 extra bytes for /%recv */ |
1884 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
47dfff3b | 1885 | dsl_dataset_t *recv_ds; |
47dfff3b MA |
1886 | |
1887 | /* | |
1888 | * A failed "newfs" (e.g. full) resumable receive leaves | |
1889 | * the stats set on this dataset. Check here for the prop. | |
1890 | */ | |
1891 | get_receive_resume_stats(ds, nv); | |
1892 | ||
1893 | /* | |
1894 | * A failed incremental resumable receive leaves the | |
1895 | * stats set on our child named "%recv". Check the child | |
1896 | * for the prop. | |
1897 | */ | |
1898 | dsl_dataset_name(ds, recvname); | |
eca7b760 IK |
1899 | if (strlcat(recvname, "/", sizeof (recvname)) < |
1900 | sizeof (recvname) && | |
1901 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
1902 | sizeof (recvname) && | |
1903 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
47dfff3b MA |
1904 | get_receive_resume_stats(recv_ds, nv); |
1905 | dsl_dataset_rele(recv_ds, FTAG); | |
1906 | } | |
1907 | } | |
34dc7c2f BB |
1908 | } |
1909 | ||
1910 | void | |
1911 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
1912 | { | |
13fe0198 MA |
1913 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1914 | ASSERT(dsl_pool_config_held(dp)); | |
1915 | ||
d683ddbb JG |
1916 | stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; |
1917 | stat->dds_inconsistent = | |
1918 | dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; | |
1919 | stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; | |
6f1ffb06 | 1920 | stat->dds_origin[0] = '\0'; |
0c66c32d | 1921 | if (ds->ds_is_snapshot) { |
34dc7c2f | 1922 | stat->dds_is_snapshot = B_TRUE; |
d683ddbb JG |
1923 | stat->dds_num_clones = |
1924 | dsl_dataset_phys(ds)->ds_num_children - 1; | |
fb5f0bc8 BB |
1925 | } else { |
1926 | stat->dds_is_snapshot = B_FALSE; | |
1927 | stat->dds_num_clones = 0; | |
34dc7c2f | 1928 | |
6f1ffb06 MA |
1929 | if (dsl_dir_is_clone(ds->ds_dir)) { |
1930 | dsl_dataset_t *ods; | |
34dc7c2f | 1931 | |
13fe0198 | 1932 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1933 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj, |
1934 | FTAG, &ods)); | |
6f1ffb06 | 1935 | dsl_dataset_name(ods, stat->dds_origin); |
13fe0198 | 1936 | dsl_dataset_rele(ods, FTAG); |
6f1ffb06 | 1937 | } |
34dc7c2f | 1938 | } |
34dc7c2f BB |
1939 | } |
1940 | ||
1941 | uint64_t | |
1942 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1943 | { | |
1944 | return (ds->ds_fsid_guid); | |
1945 | } | |
1946 | ||
1947 | void | |
1948 | dsl_dataset_space(dsl_dataset_t *ds, | |
1949 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
1950 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
1951 | { | |
d683ddbb | 1952 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 1953 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
1954 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
1955 | *availbytesp += | |
1956 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
1957 | if (ds->ds_quota != 0) { |
1958 | /* | |
1959 | * Adjust available bytes according to refquota | |
1960 | */ | |
1961 | if (*refdbytesp < ds->ds_quota) | |
1962 | *availbytesp = MIN(*availbytesp, | |
1963 | ds->ds_quota - *refdbytesp); | |
1964 | else | |
1965 | *availbytesp = 0; | |
1966 | } | |
d683ddbb | 1967 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
34dc7c2f BB |
1968 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
1969 | } | |
1970 | ||
1971 | boolean_t | |
19580676 | 1972 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 1973 | { |
19580676 MA |
1974 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
1975 | if (snap == NULL) | |
34dc7c2f | 1976 | return (B_FALSE); |
d683ddbb JG |
1977 | if (dsl_dataset_phys(ds)->ds_bp.blk_birth > |
1978 | dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 1979 | objset_t *os, *os_snap; |
572e2857 BB |
1980 | /* |
1981 | * It may be that only the ZIL differs, because it was | |
1982 | * reset in the head. Don't count that as being | |
1983 | * modified. | |
1984 | */ | |
1985 | if (dmu_objset_from_ds(ds, &os) != 0) | |
1986 | return (B_TRUE); | |
19580676 | 1987 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
1988 | return (B_TRUE); |
1989 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 1990 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
1991 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
1992 | } | |
34dc7c2f BB |
1993 | return (B_FALSE); |
1994 | } | |
1995 | ||
13fe0198 MA |
1996 | typedef struct dsl_dataset_rename_snapshot_arg { |
1997 | const char *ddrsa_fsname; | |
1998 | const char *ddrsa_oldsnapname; | |
1999 | const char *ddrsa_newsnapname; | |
2000 | boolean_t ddrsa_recursive; | |
2001 | dmu_tx_t *ddrsa_tx; | |
2002 | } dsl_dataset_rename_snapshot_arg_t; | |
2003 | ||
34dc7c2f BB |
2004 | /* ARGSUSED */ |
2005 | static int | |
13fe0198 MA |
2006 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
2007 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2008 | { |
13fe0198 MA |
2009 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2010 | int error; | |
34dc7c2f | 2011 | uint64_t val; |
34dc7c2f | 2012 | |
13fe0198 MA |
2013 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2014 | if (error != 0) { | |
2015 | /* ignore nonexistent snapshots */ | |
2016 | return (error == ENOENT ? 0 : error); | |
2017 | } | |
34dc7c2f | 2018 | |
13fe0198 MA |
2019 | /* new name should not exist */ |
2020 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2021 | if (error == 0) | |
2e528b49 | 2022 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
2023 | else if (error == ENOENT) |
2024 | error = 0; | |
34dc7c2f BB |
2025 | |
2026 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 | 2027 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
eca7b760 | 2028 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 2029 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 2030 | |
13fe0198 | 2031 | return (error); |
34dc7c2f BB |
2032 | } |
2033 | ||
13fe0198 MA |
2034 | static int |
2035 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2036 | { |
13fe0198 MA |
2037 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2038 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 2039 | dsl_dataset_t *hds; |
13fe0198 | 2040 | int error; |
34dc7c2f | 2041 | |
13fe0198 MA |
2042 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
2043 | if (error != 0) | |
2044 | return (error); | |
34dc7c2f | 2045 | |
13fe0198 MA |
2046 | if (ddrsa->ddrsa_recursive) { |
2047 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2048 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2049 | DS_FIND_CHILDREN); | |
2050 | } else { | |
2051 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2052 | } | |
b128c09f | 2053 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 2054 | return (error); |
34dc7c2f BB |
2055 | } |
2056 | ||
34dc7c2f | 2057 | static int |
13fe0198 MA |
2058 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
2059 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2060 | { |
13fe0198 MA |
2061 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2062 | dsl_dataset_t *ds; | |
2063 | uint64_t val; | |
2064 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2065 | int error; | |
34dc7c2f | 2066 | |
13fe0198 MA |
2067 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2068 | ASSERT(error == 0 || error == ENOENT); | |
2069 | if (error == ENOENT) { | |
2070 | /* ignore nonexistent snapshots */ | |
2071 | return (0); | |
34dc7c2f BB |
2072 | } |
2073 | ||
13fe0198 MA |
2074 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
2075 | ||
2076 | /* log before we change the name */ | |
2077 | spa_history_log_internal_ds(ds, "rename", tx, | |
2078 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 2079 | |
788eb90c JJ |
2080 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
2081 | B_FALSE)); | |
13fe0198 | 2082 | mutex_enter(&ds->ds_lock); |
c9d61adb | 2083 | (void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname, |
2084 | sizeof (ds->ds_snapname)); | |
13fe0198 | 2085 | mutex_exit(&ds->ds_lock); |
d683ddbb JG |
2086 | VERIFY0(zap_add(dp->dp_meta_objset, |
2087 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 2088 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
a0bd735a BP |
2089 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, |
2090 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
34dc7c2f | 2091 | |
13fe0198 | 2092 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
2093 | return (0); |
2094 | } | |
2095 | ||
13fe0198 MA |
2096 | static void |
2097 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2098 | { |
13fe0198 MA |
2099 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2100 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 2101 | dsl_dataset_t *hds = NULL; |
34dc7c2f | 2102 | |
13fe0198 MA |
2103 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
2104 | ddrsa->ddrsa_tx = tx; | |
2105 | if (ddrsa->ddrsa_recursive) { | |
2106 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2107 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
2108 | DS_FIND_CHILDREN)); | |
2109 | } else { | |
2110 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 2111 | } |
13fe0198 | 2112 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
2113 | } |
2114 | ||
13fe0198 MA |
2115 | int |
2116 | dsl_dataset_rename_snapshot(const char *fsname, | |
2117 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 2118 | { |
13fe0198 | 2119 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 2120 | |
13fe0198 MA |
2121 | ddrsa.ddrsa_fsname = fsname; |
2122 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
2123 | ddrsa.ddrsa_newsnapname = newsnapname; | |
2124 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 2125 | |
a0bd735a | 2126 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 | 2127 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
a0bd735a | 2128 | 1, ZFS_SPACE_CHECK_RESERVED)); |
34dc7c2f BB |
2129 | } |
2130 | ||
831baf06 KW |
2131 | /* |
2132 | * If we're doing an ownership handoff, we need to make sure that there is | |
2133 | * only one long hold on the dataset. We're not allowed to change anything here | |
2134 | * so we don't permanently release the long hold or regular hold here. We want | |
2135 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
47dfff3b MA |
2136 | * when we release the long hold. Allow a long hold to exist for volumes, this |
2137 | * may occur when asynchronously registering the minor with the kernel. | |
831baf06 KW |
2138 | */ |
2139 | static int | |
2140 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
2141 | { | |
2142 | boolean_t held; | |
2143 | ||
2144 | if (!dmu_tx_is_syncing(tx)) | |
2145 | return (0); | |
2146 | ||
2147 | if (owner != NULL) { | |
2148 | VERIFY3P(ds->ds_owner, ==, owner); | |
2149 | dsl_dataset_long_rele(ds, owner); | |
2150 | } | |
2151 | ||
47dfff3b | 2152 | held = (dsl_dataset_long_held(ds) && (ds->ds_owner != zvol_tag)); |
831baf06 KW |
2153 | |
2154 | if (owner != NULL) | |
2155 | dsl_dataset_long_hold(ds, owner); | |
2156 | ||
2157 | if (held) | |
2158 | return (SET_ERROR(EBUSY)); | |
2159 | ||
2160 | return (0); | |
2161 | } | |
2162 | ||
2163 | typedef struct dsl_dataset_rollback_arg { | |
2164 | const char *ddra_fsname; | |
2165 | void *ddra_owner; | |
46ba1e59 | 2166 | nvlist_t *ddra_result; |
831baf06 KW |
2167 | } dsl_dataset_rollback_arg_t; |
2168 | ||
13fe0198 MA |
2169 | static int |
2170 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2171 | { |
831baf06 | 2172 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 2173 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 2174 | dsl_dataset_t *ds; |
13fe0198 MA |
2175 | int64_t unused_refres_delta; |
2176 | int error; | |
da536844 MA |
2177 | nvpair_t *pair; |
2178 | nvlist_t *proprequest, *bookmarks; | |
34dc7c2f | 2179 | |
831baf06 | 2180 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
2181 | if (error != 0) |
2182 | return (error); | |
428870ff | 2183 | |
13fe0198 | 2184 | /* must not be a snapshot */ |
0c66c32d | 2185 | if (ds->ds_is_snapshot) { |
13fe0198 | 2186 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2187 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2188 | } |
34dc7c2f | 2189 | |
13fe0198 | 2190 | /* must have a most recent snapshot */ |
d683ddbb | 2191 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 2192 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2193 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2194 | } |
34dc7c2f | 2195 | |
da536844 | 2196 | /* must not have any bookmarks after the most recent snapshot */ |
79c76d5b | 2197 | proprequest = fnvlist_alloc(); |
da536844 | 2198 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
79c76d5b | 2199 | bookmarks = fnvlist_alloc(); |
da536844 MA |
2200 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
2201 | fnvlist_free(proprequest); | |
2202 | if (error != 0) | |
2203 | return (error); | |
2204 | for (pair = nvlist_next_nvpair(bookmarks, NULL); | |
2205 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { | |
2206 | nvlist_t *valuenv = | |
2207 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2208 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2209 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2210 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2211 | fnvlist_free(bookmarks); |
2212 | dsl_dataset_rele(ds, FTAG); | |
2213 | return (SET_ERROR(EEXIST)); | |
2214 | } | |
2215 | } | |
2216 | fnvlist_free(bookmarks); | |
2217 | ||
831baf06 KW |
2218 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2219 | if (error != 0) { | |
13fe0198 | 2220 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2221 | return (error); |
34dc7c2f | 2222 | } |
428870ff | 2223 | |
13fe0198 MA |
2224 | /* |
2225 | * Check if the snap we are rolling back to uses more than | |
2226 | * the refquota. | |
2227 | */ | |
2228 | if (ds->ds_quota != 0 && | |
d683ddbb | 2229 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2230 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2231 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2232 | } |
2233 | ||
13fe0198 MA |
2234 | /* |
2235 | * When we do the clone swap, we will temporarily use more space | |
2236 | * due to the refreservation (the head will no longer have any | |
2237 | * unique space, so the entire amount of the refreservation will need | |
2238 | * to be free). We will immediately destroy the clone, freeing | |
2239 | * this space, but the freeing happens over many txg's. | |
2240 | */ | |
2241 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2242 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2243 | |
13fe0198 MA |
2244 | if (unused_refres_delta > 0 && |
2245 | unused_refres_delta > | |
2246 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2247 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2248 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2249 | } |
34dc7c2f | 2250 | |
13fe0198 MA |
2251 | dsl_dataset_rele(ds, FTAG); |
2252 | return (0); | |
2253 | } | |
34dc7c2f | 2254 | |
13fe0198 MA |
2255 | static void |
2256 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) | |
2257 | { | |
831baf06 | 2258 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2259 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2260 | dsl_dataset_t *ds, *clone; | |
2261 | uint64_t cloneobj; | |
eca7b760 | 2262 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 2263 | |
831baf06 | 2264 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2265 | |
46ba1e59 MA |
2266 | dsl_dataset_name(ds->ds_prev, namebuf); |
2267 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2268 | ||
13fe0198 MA |
2269 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
2270 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); | |
2271 | ||
2272 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2273 | ||
2274 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2275 | dsl_dataset_zero_zil(ds, tx); | |
2276 | ||
2277 | dsl_destroy_head_sync_impl(clone, tx); | |
2278 | ||
2279 | dsl_dataset_rele(clone, FTAG); | |
2280 | dsl_dataset_rele(ds, FTAG); | |
2281 | } | |
2282 | ||
831baf06 | 2283 | /* |
46ba1e59 MA |
2284 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2285 | * The name of the most recent snapshot will be returned under key "target" | |
2286 | * in the result nvlist. | |
831baf06 | 2287 | * |
46ba1e59 | 2288 | * If owner != NULL: |
831baf06 KW |
2289 | * - The existing dataset MUST be owned by the specified owner at entry |
2290 | * - Upon return, dataset will still be held by the same owner, whether we | |
2291 | * succeed or not. | |
2292 | * | |
2293 | * This mode is required any time the existing filesystem is mounted. See | |
2294 | * notes above zfs_suspend_fs() for further details. | |
2295 | */ | |
13fe0198 | 2296 | int |
46ba1e59 | 2297 | dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) |
13fe0198 | 2298 | { |
831baf06 KW |
2299 | dsl_dataset_rollback_arg_t ddra; |
2300 | ||
2301 | ddra.ddra_fsname = fsname; | |
2302 | ddra.ddra_owner = owner; | |
46ba1e59 | 2303 | ddra.ddra_result = result; |
831baf06 | 2304 | |
13fe0198 | 2305 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
2306 | dsl_dataset_rollback_sync, &ddra, |
2307 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2308 | } |
2309 | ||
b128c09f BB |
2310 | struct promotenode { |
2311 | list_node_t link; | |
2312 | dsl_dataset_t *ds; | |
2313 | }; | |
2314 | ||
13fe0198 MA |
2315 | typedef struct dsl_dataset_promote_arg { |
2316 | const char *ddpa_clonename; | |
2317 | dsl_dataset_t *ddpa_clone; | |
b128c09f | 2318 | list_t shared_snaps, origin_snaps, clone_snaps; |
13fe0198 | 2319 | dsl_dataset_t *origin_origin; /* origin of the origin */ |
b128c09f | 2320 | uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; |
428870ff | 2321 | char *err_ds; |
788eb90c | 2322 | cred_t *cr; |
13fe0198 | 2323 | } dsl_dataset_promote_arg_t; |
34dc7c2f | 2324 | |
b128c09f | 2325 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
2326 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
2327 | void *tag); | |
2328 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 2329 | |
34dc7c2f | 2330 | static int |
13fe0198 | 2331 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2332 | { |
13fe0198 MA |
2333 | dsl_dataset_promote_arg_t *ddpa = arg; |
2334 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2335 | dsl_dataset_t *hds; | |
2336 | struct promotenode *snap; | |
2337 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 2338 | int err; |
428870ff | 2339 | uint64_t unused; |
788eb90c | 2340 | uint64_t ss_mv_cnt; |
fec41709 | 2341 | size_t max_snap_len; |
34dc7c2f | 2342 | |
13fe0198 MA |
2343 | err = promote_hold(ddpa, dp, FTAG); |
2344 | if (err != 0) | |
2345 | return (err); | |
34dc7c2f | 2346 | |
13fe0198 | 2347 | hds = ddpa->ddpa_clone; |
fec41709 | 2348 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 2349 | |
d683ddbb | 2350 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 2351 | promote_rele(ddpa, FTAG); |
2e528b49 | 2352 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
2353 | } |
2354 | ||
2355 | /* | |
2356 | * Compute and check the amount of space to transfer. Since this is | |
2357 | * so expensive, don't do the preliminary check. | |
2358 | */ | |
2359 | if (!dmu_tx_is_syncing(tx)) { | |
2360 | promote_rele(ddpa, FTAG); | |
2361 | return (0); | |
2362 | } | |
2363 | ||
2364 | snap = list_head(&ddpa->shared_snaps); | |
0a8f18f9 | 2365 | if (snap == NULL) { |
2366 | err = SET_ERROR(ENOENT); | |
2367 | goto out; | |
2368 | } | |
13fe0198 | 2369 | origin_ds = snap->ds; |
34dc7c2f BB |
2370 | |
2371 | /* compute origin's new unique space */ | |
13fe0198 | 2372 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2373 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2374 | origin_ds->ds_object); | |
428870ff | 2375 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 2376 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 2377 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 2378 | |
b128c09f BB |
2379 | /* |
2380 | * Walk the snapshots that we are moving | |
2381 | * | |
2382 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 2383 | * to used by each snapshot: |
b128c09f BB |
2384 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
2385 | * So each snapshot gave birth to: | |
2386 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
2387 | * So a sequence would look like: | |
2388 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
2389 | * Which simplifies to: | |
2390 | * uN + kN + kN-1 + ... + k1 + k0 | |
2391 | * Note however, if we stop before we reach the ORIGIN we get: | |
2392 | * uN + kN + kN-1 + ... + kM - uM-1 | |
2393 | */ | |
788eb90c | 2394 | ss_mv_cnt = 0; |
d683ddbb JG |
2395 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
2396 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
2397 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
2398 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2399 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 2400 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 2401 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 2402 | |
788eb90c JJ |
2403 | ss_mv_cnt++; |
2404 | ||
13fe0198 MA |
2405 | /* |
2406 | * If there are long holds, we won't be able to evict | |
2407 | * the objset. | |
2408 | */ | |
2409 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 2410 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
2411 | goto out; |
2412 | } | |
2413 | ||
34dc7c2f | 2414 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 2415 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
2416 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
2417 | err = SET_ERROR(ENAMETOOLONG); | |
2418 | goto out; | |
2419 | } | |
b128c09f | 2420 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 2421 | if (err == 0) { |
13fe0198 | 2422 | (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); |
2e528b49 | 2423 | err = SET_ERROR(EEXIST); |
428870ff BB |
2424 | goto out; |
2425 | } | |
b128c09f | 2426 | if (err != ENOENT) |
428870ff | 2427 | goto out; |
34dc7c2f | 2428 | |
b128c09f | 2429 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 2430 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 2431 | continue; |
34dc7c2f | 2432 | |
428870ff BB |
2433 | dsl_deadlist_space(&ds->ds_deadlist, |
2434 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
2435 | ddpa->used += dlused; |
2436 | ddpa->comp += dlcomp; | |
2437 | ddpa->uncomp += dluncomp; | |
b128c09f | 2438 | } |
34dc7c2f | 2439 | |
b128c09f BB |
2440 | /* |
2441 | * If we are a clone of a clone then we never reached ORIGIN, | |
2442 | * so we need to subtract out the clone origin's used space. | |
2443 | */ | |
13fe0198 | 2444 | if (ddpa->origin_origin) { |
d683ddbb JG |
2445 | ddpa->used -= |
2446 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
2447 | ddpa->comp -= | |
2448 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 2449 | ddpa->uncomp -= |
d683ddbb JG |
2450 | dsl_dataset_phys(ddpa->origin_origin)-> |
2451 | ds_uncompressed_bytes; | |
34dc7c2f BB |
2452 | } |
2453 | ||
788eb90c | 2454 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 2455 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 2456 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
2457 | if (err != 0) |
2458 | goto out; | |
34dc7c2f | 2459 | |
b128c09f BB |
2460 | /* |
2461 | * Compute the amounts of space that will be used by snapshots | |
2462 | * after the promotion (for both origin and clone). For each, | |
2463 | * it is the amount of space that will be on all of their | |
2464 | * deadlists (that was not born before their new origin). | |
2465 | */ | |
d683ddbb | 2466 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
2467 | uint64_t space; |
2468 | ||
2469 | /* | |
2470 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
2471 | * so dd_origin_txg will be < TXG_INITIAL, so |
2472 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
2473 | * calls will be fast because they do not have to |
2474 | * iterate over all bps. | |
2475 | */ | |
13fe0198 | 2476 | snap = list_head(&ddpa->origin_snaps); |
0a8f18f9 | 2477 | if (snap == NULL) { |
2478 | err = SET_ERROR(ENOENT); | |
2479 | goto out; | |
2480 | } | |
13fe0198 MA |
2481 | err = snaplist_space(&ddpa->shared_snaps, |
2482 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
2483 | if (err != 0) | |
2484 | goto out; | |
b128c09f | 2485 | |
13fe0198 | 2486 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 2487 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
2488 | if (err != 0) |
2489 | goto out; | |
2490 | ddpa->cloneusedsnap += space; | |
b128c09f | 2491 | } |
d683ddbb JG |
2492 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
2493 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 2494 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
2495 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
2496 | &ddpa->originusedsnap); | |
13fe0198 MA |
2497 | if (err != 0) |
2498 | goto out; | |
b128c09f BB |
2499 | } |
2500 | ||
428870ff | 2501 | out: |
13fe0198 | 2502 | promote_rele(ddpa, FTAG); |
428870ff | 2503 | return (err); |
34dc7c2f BB |
2504 | } |
2505 | ||
2506 | static void | |
13fe0198 | 2507 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2508 | { |
13fe0198 MA |
2509 | dsl_dataset_promote_arg_t *ddpa = arg; |
2510 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2511 | dsl_dataset_t *hds; | |
2512 | struct promotenode *snap; | |
2513 | dsl_dataset_t *origin_ds; | |
b128c09f | 2514 | dsl_dataset_t *origin_head; |
13fe0198 | 2515 | dsl_dir_t *dd; |
34dc7c2f | 2516 | dsl_dir_t *odd = NULL; |
b128c09f BB |
2517 | uint64_t oldnext_obj; |
2518 | int64_t delta; | |
34dc7c2f | 2519 | |
13fe0198 MA |
2520 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
2521 | hds = ddpa->ddpa_clone; | |
2522 | ||
d683ddbb | 2523 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
2524 | |
2525 | snap = list_head(&ddpa->shared_snaps); | |
2526 | origin_ds = snap->ds; | |
2527 | dd = hds->ds_dir; | |
34dc7c2f | 2528 | |
13fe0198 | 2529 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
2530 | origin_head = snap->ds; |
2531 | ||
34dc7c2f BB |
2532 | /* |
2533 | * We need to explicitly open odd, since origin_ds's dd will be | |
2534 | * changing. | |
2535 | */ | |
13fe0198 | 2536 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
2537 | NULL, FTAG, &odd)); |
2538 | ||
b128c09f BB |
2539 | /* change origin's next snap */ |
2540 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 2541 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 2542 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
2543 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
2544 | origin_ds->ds_object); | |
2545 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
2546 | |
2547 | /* change the origin's next clone */ | |
d683ddbb | 2548 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
2549 | dsl_dataset_remove_from_next_clones(origin_ds, |
2550 | snap->ds->ds_object, tx); | |
2551 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 2552 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
2553 | oldnext_obj, tx)); |
2554 | } | |
2555 | ||
2556 | /* change origin */ | |
2557 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
2558 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
2559 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 2560 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 2561 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 2562 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 2563 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 2564 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
2565 | |
2566 | /* change dd_clone entries */ | |
2567 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 2568 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2569 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 2570 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2571 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
2572 | hds->ds_object, tx)); |
2573 | ||
13fe0198 | 2574 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2575 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 2576 | origin_head->ds_object, tx)); |
d683ddbb JG |
2577 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
2578 | dsl_dir_phys(dd)->dd_clones = | |
2579 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
2580 | DMU_OT_NONE, 0, tx); | |
428870ff | 2581 | } |
13fe0198 | 2582 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2583 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 2584 | } |
34dc7c2f | 2585 | |
b128c09f | 2586 | /* move snapshots to this dir */ |
13fe0198 MA |
2587 | for (snap = list_head(&ddpa->shared_snaps); snap; |
2588 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
2589 | dsl_dataset_t *ds = snap->ds; |
2590 | ||
13fe0198 MA |
2591 | /* |
2592 | * Property callbacks are registered to a particular | |
2593 | * dsl_dir. Since ours is changing, evict the objset | |
2594 | * so that they will be unregistered from the old dsl_dir. | |
2595 | */ | |
428870ff BB |
2596 | if (ds->ds_objset) { |
2597 | dmu_objset_evict(ds->ds_objset); | |
2598 | ds->ds_objset = NULL; | |
b128c09f | 2599 | } |
13fe0198 | 2600 | |
34dc7c2f | 2601 | /* move snap name entry */ |
13fe0198 MA |
2602 | VERIFY0(dsl_dataset_get_snapname(ds)); |
2603 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 2604 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 2605 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 2606 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 2607 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
2608 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
2609 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 2610 | |
34dc7c2f BB |
2611 | /* change containing dsl_dir */ |
2612 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
2613 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
2614 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 2615 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
2616 | dsl_dir_rele(ds->ds_dir, ds); |
2617 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
2618 | NULL, ds, &ds->ds_dir)); |
2619 | ||
428870ff | 2620 | /* move any clone references */ |
d683ddbb | 2621 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
2622 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
2623 | zap_cursor_t zc; | |
2624 | zap_attribute_t za; | |
2625 | ||
2626 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 2627 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 2628 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
2629 | zap_cursor_advance(&zc)) { |
2630 | dsl_dataset_t *cnds; | |
2631 | uint64_t o; | |
34dc7c2f | 2632 | |
13fe0198 MA |
2633 | if (za.za_first_integer == oldnext_obj) { |
2634 | /* | |
2635 | * We've already moved the | |
2636 | * origin's reference. | |
2637 | */ | |
2638 | continue; | |
2639 | } | |
34dc7c2f | 2640 | |
13fe0198 MA |
2641 | VERIFY0(dsl_dataset_hold_obj(dp, |
2642 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
2643 | o = dsl_dir_phys(cnds->ds_dir)-> |
2644 | dd_head_dataset_obj; | |
34dc7c2f | 2645 | |
13fe0198 | 2646 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 2647 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 2648 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 2649 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
2650 | dsl_dataset_rele(cnds, FTAG); |
2651 | } | |
2652 | zap_cursor_fini(&zc); | |
2653 | } | |
34dc7c2f | 2654 | |
13fe0198 | 2655 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
2656 | } |
2657 | ||
34dc7c2f | 2658 | /* |
13fe0198 MA |
2659 | * Change space accounting. |
2660 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
2661 | * both be valid, or both be 0 (resulting in delta == 0). This | |
2662 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 2663 | */ |
570827e1 | 2664 | |
13fe0198 | 2665 | delta = ddpa->cloneusedsnap - |
d683ddbb | 2666 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2667 | ASSERT3S(delta, >=, 0); |
2668 | ASSERT3U(ddpa->used, >=, delta); | |
2669 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
2670 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
2671 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 2672 | |
13fe0198 | 2673 | delta = ddpa->originusedsnap - |
d683ddbb | 2674 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
2675 | ASSERT3S(delta, <=, 0); |
2676 | ASSERT3U(ddpa->used, >=, -delta); | |
2677 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
2678 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
2679 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
2680 | ||
d683ddbb | 2681 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
2682 | |
2683 | /* log history record */ | |
2684 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
2685 | ||
2686 | dsl_dir_rele(odd, FTAG); | |
2687 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
2688 | } |
2689 | ||
13fe0198 MA |
2690 | /* |
2691 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
2692 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
2693 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
2694 | * snapshots back to this dataset's origin. | |
2695 | */ | |
34dc7c2f | 2696 | static int |
13fe0198 MA |
2697 | snaplist_make(dsl_pool_t *dp, |
2698 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 2699 | { |
13fe0198 | 2700 | uint64_t obj = last_obj; |
34dc7c2f | 2701 | |
13fe0198 MA |
2702 | list_create(l, sizeof (struct promotenode), |
2703 | offsetof(struct promotenode, link)); | |
34dc7c2f | 2704 | |
13fe0198 MA |
2705 | while (obj != first_obj) { |
2706 | dsl_dataset_t *ds; | |
2707 | struct promotenode *snap; | |
2708 | int err; | |
428870ff | 2709 | |
13fe0198 MA |
2710 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
2711 | ASSERT(err != ENOENT); | |
2712 | if (err != 0) | |
2713 | return (err); | |
34dc7c2f | 2714 | |
13fe0198 | 2715 | if (first_obj == 0) |
d683ddbb | 2716 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 2717 | |
79c76d5b | 2718 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
2719 | snap->ds = ds; |
2720 | list_insert_tail(l, snap); | |
d683ddbb | 2721 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 2722 | } |
34dc7c2f BB |
2723 | |
2724 | return (0); | |
2725 | } | |
2726 | ||
13fe0198 MA |
2727 | static int |
2728 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 2729 | { |
13fe0198 | 2730 | struct promotenode *snap; |
6f1ffb06 | 2731 | |
13fe0198 MA |
2732 | *spacep = 0; |
2733 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
2734 | uint64_t used, comp, uncomp; | |
2735 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
2736 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
2737 | *spacep += used; | |
428870ff | 2738 | } |
13fe0198 | 2739 | return (0); |
34dc7c2f BB |
2740 | } |
2741 | ||
13fe0198 MA |
2742 | static void |
2743 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 2744 | { |
13fe0198 | 2745 | struct promotenode *snap; |
428870ff | 2746 | |
13fe0198 MA |
2747 | if (l == NULL || !list_link_active(&l->list_head)) |
2748 | return; | |
34dc7c2f | 2749 | |
13fe0198 MA |
2750 | while ((snap = list_tail(l)) != NULL) { |
2751 | list_remove(l, snap); | |
2752 | dsl_dataset_rele(snap->ds, tag); | |
2753 | kmem_free(snap, sizeof (*snap)); | |
2754 | } | |
2755 | list_destroy(l); | |
34dc7c2f BB |
2756 | } |
2757 | ||
2758 | static int | |
13fe0198 | 2759 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 2760 | { |
13fe0198 MA |
2761 | int error; |
2762 | dsl_dir_t *dd; | |
2763 | struct promotenode *snap; | |
34dc7c2f | 2764 | |
13fe0198 MA |
2765 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
2766 | &ddpa->ddpa_clone); | |
2767 | if (error != 0) | |
2768 | return (error); | |
2769 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 2770 | |
0c66c32d | 2771 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
2772 | !dsl_dir_is_clone(dd)) { |
2773 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 2774 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2775 | } |
34dc7c2f | 2776 | |
d683ddbb | 2777 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
2778 | &ddpa->shared_snaps, tag); |
2779 | if (error != 0) | |
2780 | goto out; | |
34dc7c2f | 2781 | |
13fe0198 MA |
2782 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
2783 | &ddpa->clone_snaps, tag); | |
2784 | if (error != 0) | |
2785 | goto out; | |
34dc7c2f | 2786 | |
13fe0198 | 2787 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
2788 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
2789 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
2790 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
2791 | &ddpa->origin_snaps, tag); |
2792 | if (error != 0) | |
2793 | goto out; | |
d164b209 | 2794 | |
d683ddbb | 2795 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 2796 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 2797 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
2798 | tag, &ddpa->origin_origin); |
2799 | if (error != 0) | |
2800 | goto out; | |
d164b209 | 2801 | } |
13fe0198 MA |
2802 | out: |
2803 | if (error != 0) | |
2804 | promote_rele(ddpa, tag); | |
2805 | return (error); | |
34dc7c2f BB |
2806 | } |
2807 | ||
34dc7c2f | 2808 | static void |
13fe0198 | 2809 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 2810 | { |
13fe0198 MA |
2811 | snaplist_destroy(&ddpa->shared_snaps, tag); |
2812 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
2813 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
2814 | if (ddpa->origin_origin != NULL) | |
2815 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
2816 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2817 | } | |
428870ff | 2818 | |
13fe0198 MA |
2819 | /* |
2820 | * Promote a clone. | |
2821 | * | |
2822 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
eca7b760 | 2823 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
13fe0198 MA |
2824 | */ |
2825 | int | |
2826 | dsl_dataset_promote(const char *name, char *conflsnap) | |
2827 | { | |
2828 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
2829 | uint64_t numsnaps; | |
2830 | int error; | |
2831 | objset_t *os; | |
34dc7c2f | 2832 | |
13fe0198 MA |
2833 | /* |
2834 | * We will modify space proportional to the number of | |
2835 | * snapshots. Compute numsnaps. | |
2836 | */ | |
2837 | error = dmu_objset_hold(name, FTAG, &os); | |
2838 | if (error != 0) | |
2839 | return (error); | |
2840 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
2841 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
2842 | &numsnaps); | |
13fe0198 MA |
2843 | dmu_objset_rele(os, FTAG); |
2844 | if (error != 0) | |
2845 | return (error); | |
34dc7c2f | 2846 | |
13fe0198 MA |
2847 | ddpa.ddpa_clonename = name; |
2848 | ddpa.err_ds = conflsnap; | |
788eb90c | 2849 | ddpa.cr = CRED(); |
6f1ffb06 | 2850 | |
13fe0198 | 2851 | return (dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 MA |
2852 | dsl_dataset_promote_sync, &ddpa, |
2853 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
2854 | } |
2855 | ||
2856 | int | |
13fe0198 | 2857 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 2858 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 2859 | { |
8c62a0d0 DM |
2860 | /* |
2861 | * "slack" factor for received datasets with refquota set on them. | |
2862 | * See the bottom of this function for details on its use. | |
2863 | */ | |
bf18fd89 CIK |
2864 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * |
2865 | spa_asize_inflation; | |
13fe0198 | 2866 | int64_t unused_refres_delta; |
34dc7c2f | 2867 | |
13fe0198 | 2868 | /* they should both be heads */ |
0c66c32d JG |
2869 | if (clone->ds_is_snapshot || |
2870 | origin_head->ds_is_snapshot) | |
2e528b49 | 2871 | return (SET_ERROR(EINVAL)); |
428870ff | 2872 | |
19580676 MA |
2873 | /* if we are not forcing, the branch point should be just before them */ |
2874 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 2875 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2876 | |
13fe0198 MA |
2877 | /* clone should be the clone (unless they are unrelated) */ |
2878 | if (clone->ds_prev != NULL && | |
2879 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 2880 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 2881 | return (SET_ERROR(EINVAL)); |
428870ff | 2882 | |
13fe0198 MA |
2883 | /* the clone should be a child of the origin */ |
2884 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 2885 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 2886 | |
13fe0198 | 2887 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
2888 | if (!force && |
2889 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 2890 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 2891 | |
13fe0198 | 2892 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 2893 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 2894 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
2895 | |
2896 | /* check amount of any unconsumed refreservation */ | |
2897 | unused_refres_delta = | |
2898 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2899 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 2900 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 2901 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
2902 | |
2903 | if (unused_refres_delta > 0 && | |
2904 | unused_refres_delta > | |
2905 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 2906 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2907 | |
8c62a0d0 DM |
2908 | /* |
2909 | * The clone can't be too much over the head's refquota. | |
2910 | * | |
2911 | * To ensure that the entire refquota can be used, we allow one | |
2912 | * transaction to exceed the the refquota. Therefore, this check | |
2913 | * needs to also allow for the space referenced to be more than the | |
2914 | * refquota. The maximum amount of space that one transaction can use | |
2915 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
2916 | * overage ensures that we are able to receive a filesystem that | |
2917 | * exceeds the refquota on the source system. | |
2918 | * | |
2919 | * So that overage is the refquota_slack we use below. | |
2920 | */ | |
13fe0198 | 2921 | if (origin_head->ds_quota != 0 && |
d683ddbb | 2922 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
8c62a0d0 | 2923 | origin_head->ds_quota + refquota_slack) |
2e528b49 | 2924 | return (SET_ERROR(EDQUOT)); |
572e2857 | 2925 | |
13fe0198 | 2926 | return (0); |
572e2857 BB |
2927 | } |
2928 | ||
2929 | void | |
13fe0198 MA |
2930 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
2931 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 2932 | { |
241b5415 | 2933 | spa_feature_t f; |
13fe0198 MA |
2934 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2935 | int64_t unused_refres_delta; | |
428870ff | 2936 | |
13fe0198 | 2937 | ASSERT(clone->ds_reserved == 0); |
8c62a0d0 DM |
2938 | /* |
2939 | * NOTE: On DEBUG kernels there could be a race between this and | |
2940 | * the check function if spa_asize_inflation is adjusted... | |
2941 | */ | |
13fe0198 | 2942 | ASSERT(origin_head->ds_quota == 0 || |
8c62a0d0 DM |
2943 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
2944 | DMU_MAX_ACCESS * spa_asize_inflation); | |
19580676 | 2945 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 2946 | |
241b5415 MA |
2947 | /* |
2948 | * Swap per-dataset feature flags. | |
2949 | */ | |
2950 | for (f = 0; f < SPA_FEATURES; f++) { | |
2951 | boolean_t clone_inuse; | |
2952 | boolean_t origin_head_inuse; | |
2953 | ||
2954 | if (!(spa_feature_table[f].fi_flags & | |
2955 | ZFEATURE_FLAG_PER_DATASET)) { | |
2956 | ASSERT(!clone->ds_feature_inuse[f]); | |
2957 | ASSERT(!origin_head->ds_feature_inuse[f]); | |
2958 | continue; | |
2959 | } | |
2960 | ||
2961 | clone_inuse = clone->ds_feature_inuse[f]; | |
2962 | origin_head_inuse = origin_head->ds_feature_inuse[f]; | |
2963 | ||
2964 | if (clone_inuse) { | |
2965 | dsl_dataset_deactivate_feature(clone->ds_object, f, tx); | |
2966 | clone->ds_feature_inuse[f] = B_FALSE; | |
2967 | } | |
2968 | if (origin_head_inuse) { | |
2969 | dsl_dataset_deactivate_feature(origin_head->ds_object, | |
2970 | f, tx); | |
2971 | origin_head->ds_feature_inuse[f] = B_FALSE; | |
2972 | } | |
2973 | if (clone_inuse) { | |
2974 | dsl_dataset_activate_feature(origin_head->ds_object, | |
2975 | f, tx); | |
2976 | origin_head->ds_feature_inuse[f] = B_TRUE; | |
2977 | } | |
2978 | if (origin_head_inuse) { | |
2979 | dsl_dataset_activate_feature(clone->ds_object, f, tx); | |
2980 | clone->ds_feature_inuse[f] = B_TRUE; | |
2981 | } | |
2982 | } | |
2983 | ||
13fe0198 MA |
2984 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
2985 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 2986 | |
13fe0198 MA |
2987 | if (clone->ds_objset != NULL) { |
2988 | dmu_objset_evict(clone->ds_objset); | |
2989 | clone->ds_objset = NULL; | |
2990 | } | |
45d1cae3 | 2991 | |
13fe0198 MA |
2992 | if (origin_head->ds_objset != NULL) { |
2993 | dmu_objset_evict(origin_head->ds_objset); | |
2994 | origin_head->ds_objset = NULL; | |
45d1cae3 | 2995 | } |
45d1cae3 | 2996 | |
13fe0198 MA |
2997 | unused_refres_delta = |
2998 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 2999 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3000 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3001 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3002 | |
3003 | /* | |
3004 | * Reset origin's unique bytes, if it exists. | |
3005 | */ | |
3006 | if (clone->ds_prev) { | |
3007 | dsl_dataset_t *origin = clone->ds_prev; | |
3008 | uint64_t comp, uncomp; | |
3009 | ||
3010 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
3011 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
3012 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
3013 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
3014 | } |
3015 | ||
3016 | /* swap blkptrs */ | |
3017 | { | |
3018 | blkptr_t tmp; | |
d683ddbb JG |
3019 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
3020 | dsl_dataset_phys(origin_head)->ds_bp = | |
3021 | dsl_dataset_phys(clone)->ds_bp; | |
3022 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
13fe0198 MA |
3023 | } |
3024 | ||
3025 | /* set dd_*_bytes */ | |
3026 | { | |
3027 | int64_t dused, dcomp, duncomp; | |
3028 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
3029 | uint64_t odl_used, odl_comp, odl_uncomp; | |
3030 | ||
d683ddbb | 3031 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
3032 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
3033 | ||
3034 | dsl_deadlist_space(&clone->ds_deadlist, | |
3035 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3036 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
3037 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 3038 | |
d683ddbb JG |
3039 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
3040 | cdl_used - | |
3041 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
3042 | odl_used); | |
3043 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
3044 | cdl_comp - | |
3045 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
3046 | odl_comp); | |
3047 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 3048 | cdl_uncomp - |
d683ddbb JG |
3049 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
3050 | odl_uncomp); | |
45d1cae3 | 3051 | |
13fe0198 MA |
3052 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
3053 | dused, dcomp, duncomp, tx); | |
3054 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
3055 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 3056 | |
45d1cae3 | 3057 | /* |
13fe0198 MA |
3058 | * The difference in the space used by snapshots is the |
3059 | * difference in snapshot space due to the head's | |
3060 | * deadlist (since that's the only thing that's | |
3061 | * changing that affects the snapused). | |
45d1cae3 | 3062 | */ |
13fe0198 MA |
3063 | dsl_deadlist_space_range(&clone->ds_deadlist, |
3064 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3065 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3066 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
3067 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3068 | &odl_used, &odl_comp, &odl_uncomp); | |
3069 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
3070 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 3071 | } |
45d1cae3 | 3072 | |
13fe0198 | 3073 | /* swap ds_*_bytes */ |
d683ddbb JG |
3074 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
3075 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
3076 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
3077 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
3078 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
3079 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
3080 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
3081 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 3082 | |
13fe0198 MA |
3083 | /* apply any parent delta for change in unconsumed refreservation */ |
3084 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
3085 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 3086 | |
13fe0198 MA |
3087 | /* |
3088 | * Swap deadlists. | |
3089 | */ | |
3090 | dsl_deadlist_close(&clone->ds_deadlist); | |
3091 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
3092 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
3093 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 3094 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3095 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 3096 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3097 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
45d1cae3 | 3098 | |
13fe0198 | 3099 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 3100 | |
13fe0198 MA |
3101 | spa_history_log_internal_ds(clone, "clone swap", tx, |
3102 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
3103 | } |
3104 | ||
13fe0198 MA |
3105 | /* |
3106 | * Given a pool name and a dataset object number in that pool, | |
3107 | * return the name of that dataset. | |
3108 | */ | |
572e2857 | 3109 | int |
13fe0198 | 3110 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 3111 | { |
13fe0198 MA |
3112 | dsl_pool_t *dp; |
3113 | dsl_dataset_t *ds; | |
572e2857 BB |
3114 | int error; |
3115 | ||
13fe0198 MA |
3116 | error = dsl_pool_hold(pname, FTAG, &dp); |
3117 | if (error != 0) | |
3118 | return (error); | |
3119 | ||
3120 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
3121 | if (error == 0) { | |
3122 | dsl_dataset_name(ds, buf); | |
3123 | dsl_dataset_rele(ds, FTAG); | |
3124 | } | |
3125 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
3126 | |
3127 | return (error); | |
3128 | } | |
3129 | ||
45d1cae3 | 3130 | int |
13fe0198 MA |
3131 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
3132 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 3133 | { |
13fe0198 | 3134 | int error = 0; |
45d1cae3 | 3135 | |
13fe0198 | 3136 | ASSERT3S(asize, >, 0); |
45d1cae3 | 3137 | |
13fe0198 MA |
3138 | /* |
3139 | * *ref_rsrv is the portion of asize that will come from any | |
3140 | * unconsumed refreservation space. | |
3141 | */ | |
3142 | *ref_rsrv = 0; | |
45d1cae3 | 3143 | |
13fe0198 MA |
3144 | mutex_enter(&ds->ds_lock); |
3145 | /* | |
3146 | * Make a space adjustment for reserved bytes. | |
3147 | */ | |
d683ddbb | 3148 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 3149 | ASSERT3U(*used, >=, |
d683ddbb JG |
3150 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
3151 | *used -= | |
3152 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
3153 | *ref_rsrv = |
3154 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
3155 | } |
3156 | ||
13fe0198 MA |
3157 | if (!check_quota || ds->ds_quota == 0) { |
3158 | mutex_exit(&ds->ds_lock); | |
3159 | return (0); | |
45d1cae3 | 3160 | } |
13fe0198 MA |
3161 | /* |
3162 | * If they are requesting more space, and our current estimate | |
3163 | * is over quota, they get to try again unless the actual | |
3164 | * on-disk is over quota and there are no pending changes (which | |
3165 | * may free up space for us). | |
3166 | */ | |
d683ddbb JG |
3167 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
3168 | ds->ds_quota) { | |
13fe0198 | 3169 | if (inflight > 0 || |
d683ddbb | 3170 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 3171 | error = SET_ERROR(ERESTART); |
13fe0198 | 3172 | else |
2e528b49 | 3173 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 3174 | } |
13fe0198 | 3175 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3176 | |
45d1cae3 BB |
3177 | return (error); |
3178 | } | |
3179 | ||
13fe0198 MA |
3180 | typedef struct dsl_dataset_set_qr_arg { |
3181 | const char *ddsqra_name; | |
3182 | zprop_source_t ddsqra_source; | |
3183 | uint64_t ddsqra_value; | |
3184 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 3185 | |
13fe0198 MA |
3186 | |
3187 | /* ARGSUSED */ | |
45d1cae3 | 3188 | static int |
13fe0198 | 3189 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3190 | { |
13fe0198 MA |
3191 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3192 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3193 | dsl_dataset_t *ds; | |
45d1cae3 | 3194 | int error; |
13fe0198 | 3195 | uint64_t newval; |
45d1cae3 | 3196 | |
13fe0198 | 3197 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 3198 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3199 | |
13fe0198 MA |
3200 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3201 | if (error != 0) | |
3202 | return (error); | |
3203 | ||
0c66c32d | 3204 | if (ds->ds_is_snapshot) { |
13fe0198 | 3205 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3206 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3207 | } |
3208 | ||
13fe0198 MA |
3209 | error = dsl_prop_predict(ds->ds_dir, |
3210 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3211 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3212 | if (error != 0) { | |
3213 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3214 | return (error); |
3215 | } | |
3216 | ||
13fe0198 MA |
3217 | if (newval == 0) { |
3218 | dsl_dataset_rele(ds, FTAG); | |
3219 | return (0); | |
3220 | } | |
3221 | ||
d683ddbb | 3222 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
3223 | newval < ds->ds_reserved) { |
3224 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3225 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3226 | } |
45d1cae3 | 3227 | |
13fe0198 | 3228 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3229 | return (0); |
3230 | } | |
3231 | ||
13fe0198 MA |
3232 | static void |
3233 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3234 | { |
13fe0198 MA |
3235 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3236 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3237 | dsl_dataset_t *ds = NULL; |
13fe0198 | 3238 | uint64_t newval; |
45d1cae3 | 3239 | |
13fe0198 | 3240 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 3241 | |
13fe0198 MA |
3242 | dsl_prop_set_sync_impl(ds, |
3243 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3244 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
3245 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3246 | |
13fe0198 MA |
3247 | VERIFY0(dsl_prop_get_int_ds(ds, |
3248 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 3249 | |
13fe0198 MA |
3250 | if (ds->ds_quota != newval) { |
3251 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3252 | ds->ds_quota = newval; | |
45d1cae3 | 3253 | } |
13fe0198 | 3254 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3255 | } |
3256 | ||
13fe0198 MA |
3257 | int |
3258 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
3259 | uint64_t refquota) | |
45d1cae3 | 3260 | { |
13fe0198 | 3261 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3262 | |
13fe0198 MA |
3263 | ddsqra.ddsqra_name = dsname; |
3264 | ddsqra.ddsqra_source = source; | |
3265 | ddsqra.ddsqra_value = refquota; | |
3266 | ||
3267 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
3d45fdd6 | 3268 | dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); |
45d1cae3 BB |
3269 | } |
3270 | ||
3271 | static int | |
13fe0198 | 3272 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3273 | { |
13fe0198 MA |
3274 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3275 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
3276 | dsl_dataset_t *ds; |
3277 | int error; | |
13fe0198 | 3278 | uint64_t newval, unique; |
428870ff | 3279 | |
13fe0198 | 3280 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 3281 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3282 | |
13fe0198 MA |
3283 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3284 | if (error != 0) | |
45d1cae3 | 3285 | return (error); |
45d1cae3 | 3286 | |
0c66c32d | 3287 | if (ds->ds_is_snapshot) { |
13fe0198 | 3288 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3289 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3290 | } |
3291 | ||
13fe0198 MA |
3292 | error = dsl_prop_predict(ds->ds_dir, |
3293 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
3294 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3295 | if (error != 0) { | |
3296 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3297 | return (error); |
3298 | } | |
3299 | ||
13fe0198 MA |
3300 | /* |
3301 | * If we are doing the preliminary check in open context, the | |
3302 | * space estimates may be inaccurate. | |
3303 | */ | |
3304 | if (!dmu_tx_is_syncing(tx)) { | |
3305 | dsl_dataset_rele(ds, FTAG); | |
3306 | return (0); | |
45d1cae3 | 3307 | } |
45d1cae3 | 3308 | |
13fe0198 MA |
3309 | mutex_enter(&ds->ds_lock); |
3310 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
3311 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 3312 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 3313 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3314 | |
13fe0198 MA |
3315 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
3316 | uint64_t delta = MAX(unique, newval) - | |
3317 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 3318 | |
13fe0198 MA |
3319 | if (delta > |
3320 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
3321 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
3322 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3323 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3324 | } |
45d1cae3 BB |
3325 | } |
3326 | ||
13fe0198 MA |
3327 | dsl_dataset_rele(ds, FTAG); |
3328 | return (0); | |
45d1cae3 BB |
3329 | } |
3330 | ||
13fe0198 MA |
3331 | void |
3332 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
3333 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 3334 | { |
13fe0198 MA |
3335 | uint64_t newval; |
3336 | uint64_t unique; | |
3337 | int64_t delta; | |
428870ff | 3338 | |
13fe0198 MA |
3339 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
3340 | source, sizeof (value), 1, &value, tx); | |
428870ff | 3341 | |
13fe0198 MA |
3342 | VERIFY0(dsl_prop_get_int_ds(ds, |
3343 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 3344 | |
13fe0198 MA |
3345 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
3346 | mutex_enter(&ds->ds_dir->dd_lock); | |
3347 | mutex_enter(&ds->ds_lock); | |
3348 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 3349 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
3350 | delta = MAX(0, (int64_t)(newval - unique)) - |
3351 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
3352 | ds->ds_reserved = newval; | |
3353 | mutex_exit(&ds->ds_lock); | |
572e2857 | 3354 | |
13fe0198 MA |
3355 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
3356 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
3357 | } |
3358 | ||
13fe0198 MA |
3359 | static void |
3360 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3361 | { |
13fe0198 MA |
3362 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3363 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3364 | dsl_dataset_t *ds = NULL; |
45d1cae3 | 3365 | |
13fe0198 MA |
3366 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
3367 | dsl_dataset_set_refreservation_sync_impl(ds, | |
3368 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 3369 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 3370 | } |
428870ff | 3371 | |
428870ff | 3372 | int |
13fe0198 MA |
3373 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
3374 | uint64_t refreservation) | |
428870ff | 3375 | { |
13fe0198 | 3376 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 3377 | |
13fe0198 MA |
3378 | ddsqra.ddsqra_name = dsname; |
3379 | ddsqra.ddsqra_source = source; | |
3380 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 3381 | |
13fe0198 | 3382 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
3d45fdd6 MA |
3383 | dsl_dataset_set_refreservation_sync, &ddsqra, |
3384 | 0, ZFS_SPACE_CHECK_NONE)); | |
13fe0198 | 3385 | } |
330d06f9 MA |
3386 | |
3387 | /* | |
3388 | * Return (in *usedp) the amount of space written in new that is not | |
3389 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
3390 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
3391 | * fail and return EINVAL. | |
3392 | * | |
3393 | * The written space is calculated by considering two components: First, we | |
3394 | * ignore any freed space, and calculate the written as new's used space | |
3395 | * minus old's used space. Next, we add in the amount of space that was freed | |
3396 | * between the two snapshots, thus reducing new's used space relative to old's. | |
3397 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
3398 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
3399 | * | |
3400 | * space freed [---------------------] | |
3401 | * snapshots ---O-------O--------O-------O------ | |
3402 | * oldsnap new | |
3403 | */ | |
3404 | int | |
3405 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
3406 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3407 | { | |
3408 | int err = 0; | |
3409 | uint64_t snapobj; | |
3410 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
3411 | ||
13fe0198 MA |
3412 | ASSERT(dsl_pool_config_held(dp)); |
3413 | ||
330d06f9 | 3414 | *usedp = 0; |
d683ddbb JG |
3415 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
3416 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
3417 | |
3418 | *compp = 0; | |
d683ddbb JG |
3419 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
3420 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
3421 | |
3422 | *uncompp = 0; | |
d683ddbb JG |
3423 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
3424 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 3425 | |
330d06f9 MA |
3426 | snapobj = new->ds_object; |
3427 | while (snapobj != oldsnap->ds_object) { | |
3428 | dsl_dataset_t *snap; | |
3429 | uint64_t used, comp, uncomp; | |
3430 | ||
9ae529ec CS |
3431 | if (snapobj == new->ds_object) { |
3432 | snap = new; | |
3433 | } else { | |
3434 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
3435 | if (err != 0) | |
3436 | break; | |
3437 | } | |
330d06f9 | 3438 | |
d683ddbb JG |
3439 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
3440 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
3441 | /* |
3442 | * The blocks in the deadlist can not be born after | |
3443 | * ds_prev_snap_txg, so get the whole deadlist space, | |
3444 | * which is more efficient (especially for old-format | |
3445 | * deadlists). Unfortunately the deadlist code | |
3446 | * doesn't have enough information to make this | |
3447 | * optimization itself. | |
3448 | */ | |
3449 | dsl_deadlist_space(&snap->ds_deadlist, | |
3450 | &used, &comp, &uncomp); | |
3451 | } else { | |
3452 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 3453 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
3454 | &used, &comp, &uncomp); |
3455 | } | |
3456 | *usedp += used; | |
3457 | *compp += comp; | |
3458 | *uncompp += uncomp; | |
3459 | ||
3460 | /* | |
3461 | * If we get to the beginning of the chain of snapshots | |
3462 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
3463 | * was not a snapshot of/before new. | |
3464 | */ | |
d683ddbb | 3465 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
3466 | if (snap != new) |
3467 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 3468 | if (snapobj == 0) { |
2e528b49 | 3469 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
3470 | break; |
3471 | } | |
3472 | ||
3473 | } | |
330d06f9 MA |
3474 | return (err); |
3475 | } | |
3476 | ||
3477 | /* | |
3478 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
3479 | * lastsnap, and all snapshots in between are deleted. | |
3480 | * | |
3481 | * blocks that would be freed [---------------------------] | |
3482 | * snapshots ---O-------O--------O-------O--------O | |
3483 | * firstsnap lastsnap | |
3484 | * | |
3485 | * This is the set of blocks that were born after the snap before firstsnap, | |
3486 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
3487 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
3488 | * We calculate this by iterating over the relevant deadlists (from the snap | |
3489 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
3490 | * space on the deadlist that was born after the snap before firstsnap. | |
3491 | */ | |
3492 | int | |
3493 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
3494 | dsl_dataset_t *lastsnap, | |
3495 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
3496 | { | |
3497 | int err = 0; | |
3498 | uint64_t snapobj; | |
3499 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
3500 | ||
0c66c32d JG |
3501 | ASSERT(firstsnap->ds_is_snapshot); |
3502 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
3503 | |
3504 | /* | |
3505 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
3506 | * is before lastsnap. | |
3507 | */ | |
3508 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
3509 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
3510 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 3511 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
3512 | |
3513 | *usedp = *compp = *uncompp = 0; | |
3514 | ||
d683ddbb | 3515 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
3516 | while (snapobj != firstsnap->ds_object) { |
3517 | dsl_dataset_t *ds; | |
3518 | uint64_t used, comp, uncomp; | |
3519 | ||
3520 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
3521 | if (err != 0) | |
3522 | break; | |
3523 | ||
3524 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 3525 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
3526 | &used, &comp, &uncomp); |
3527 | *usedp += used; | |
3528 | *compp += comp; | |
3529 | *uncompp += uncomp; | |
3530 | ||
d683ddbb | 3531 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
3532 | ASSERT3U(snapobj, !=, 0); |
3533 | dsl_dataset_rele(ds, FTAG); | |
3534 | } | |
330d06f9 MA |
3535 | return (err); |
3536 | } | |
3537 | ||
13fe0198 MA |
3538 | /* |
3539 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
3540 | * For example, they could both be snapshots of the same filesystem, and | |
3541 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
3542 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
3543 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
3544 | * |
3545 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
3546 | */ |
3547 | boolean_t | |
da536844 MA |
3548 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
3549 | uint64_t earlier_txg) | |
13fe0198 MA |
3550 | { |
3551 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
3552 | int error; | |
3553 | boolean_t ret; | |
3554 | dsl_dataset_t *origin; | |
3555 | ||
3556 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 3557 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
3558 | |
3559 | if (earlier_txg == 0) | |
d683ddbb | 3560 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 3561 | |
0c66c32d | 3562 | if (later->ds_is_snapshot && |
d683ddbb | 3563 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
3564 | return (B_FALSE); |
3565 | ||
3566 | if (later->ds_dir == earlier->ds_dir) | |
3567 | return (B_TRUE); | |
3568 | if (!dsl_dir_is_clone(later->ds_dir)) | |
3569 | return (B_FALSE); | |
3570 | ||
d683ddbb | 3571 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 MA |
3572 | return (B_TRUE); |
3573 | error = dsl_dataset_hold_obj(dp, | |
d683ddbb | 3574 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
3575 | if (error != 0) |
3576 | return (B_FALSE); | |
da536844 | 3577 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
3578 | dsl_dataset_rele(origin, FTAG); |
3579 | return (ret); | |
3580 | } | |
3581 | ||
fa86b5db MA |
3582 | void |
3583 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
3584 | { | |
3585 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
3586 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
3587 | } | |
3588 | ||
47dfff3b MA |
3589 | boolean_t |
3590 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
3591 | { | |
3592 | dmu_object_info_t doi; | |
3593 | ||
3594 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
3595 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
3596 | } | |
3597 | ||
3598 | boolean_t | |
3599 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
3600 | { | |
3601 | return (dsl_dataset_is_zapified(ds) && | |
3602 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
3603 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
3604 | } | |
3605 | ||
c28b2279 | 3606 | #if defined(_KERNEL) && defined(HAVE_SPL) |
f1512ee6 MA |
3607 | #if defined(_LP64) |
3608 | module_param(zfs_max_recordsize, int, 0644); | |
3609 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3610 | #else | |
3611 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
3612 | module_param(zfs_max_recordsize, int, 0444); | |
3613 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
3614 | #endif | |
3615 | ||
c28b2279 BB |
3616 | EXPORT_SYMBOL(dsl_dataset_hold); |
3617 | EXPORT_SYMBOL(dsl_dataset_hold_obj); | |
3618 | EXPORT_SYMBOL(dsl_dataset_own); | |
3619 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
3620 | EXPORT_SYMBOL(dsl_dataset_name); | |
3621 | EXPORT_SYMBOL(dsl_dataset_rele); | |
3622 | EXPORT_SYMBOL(dsl_dataset_disown); | |
c28b2279 | 3623 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
3624 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
3625 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
3626 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
3627 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 3628 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
3629 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
3630 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
3631 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
3632 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
3633 | EXPORT_SYMBOL(dsl_dataset_set_blkptr); | |
3634 | EXPORT_SYMBOL(dsl_dataset_get_spa); | |
19580676 | 3635 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
3636 | EXPORT_SYMBOL(dsl_dataset_space_written); |
3637 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
3638 | EXPORT_SYMBOL(dsl_dataset_sync); |
3639 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
3640 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
3641 | EXPORT_SYMBOL(dsl_dataset_block_freeable); | |
3642 | EXPORT_SYMBOL(dsl_dataset_prev_snap_txg); | |
3643 | EXPORT_SYMBOL(dsl_dataset_dirty); | |
3644 | EXPORT_SYMBOL(dsl_dataset_stats); | |
3645 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
3646 | EXPORT_SYMBOL(dsl_dataset_space); | |
3647 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
3648 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
3649 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
3650 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
3651 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 3652 | #endif |