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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
9b7b9cd3 | 21 | |
34dc7c2f | 22 | /* |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
d52d80b7 | 24 | * Copyright (c) 2011, 2018 by Delphix. All rights reserved. |
788eb90c | 25 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
36f92e93 | 26 | * Copyright (c) 2014 RackTop Systems. |
0c66c32d | 27 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
a0bd735a | 28 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. |
8c62a0d0 | 29 | * Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved. |
9b7b9cd3 | 30 | * Copyright 2017 Nexenta Systems, Inc. |
34dc7c2f BB |
31 | */ |
32 | ||
34dc7c2f BB |
33 | #include <sys/dmu_objset.h> |
34 | #include <sys/dsl_dataset.h> | |
35 | #include <sys/dsl_dir.h> | |
36 | #include <sys/dsl_prop.h> | |
37 | #include <sys/dsl_synctask.h> | |
38 | #include <sys/dmu_traverse.h> | |
37abac6d | 39 | #include <sys/dmu_impl.h> |
34dc7c2f BB |
40 | #include <sys/dmu_tx.h> |
41 | #include <sys/arc.h> | |
42 | #include <sys/zio.h> | |
43 | #include <sys/zap.h> | |
9ae529ec | 44 | #include <sys/zfeature.h> |
34dc7c2f BB |
45 | #include <sys/unique.h> |
46 | #include <sys/zfs_context.h> | |
47 | #include <sys/zfs_ioctl.h> | |
48 | #include <sys/spa.h> | |
d2734cce | 49 | #include <sys/spa_impl.h> |
a1d477c2 | 50 | #include <sys/vdev.h> |
b128c09f | 51 | #include <sys/zfs_znode.h> |
572e2857 | 52 | #include <sys/zfs_onexit.h> |
45d1cae3 | 53 | #include <sys/zvol.h> |
428870ff BB |
54 | #include <sys/dsl_scan.h> |
55 | #include <sys/dsl_deadlist.h> | |
13fe0198 MA |
56 | #include <sys/dsl_destroy.h> |
57 | #include <sys/dsl_userhold.h> | |
da536844 | 58 | #include <sys/dsl_bookmark.h> |
f74b821a | 59 | #include <sys/policy.h> |
30af21b0 | 60 | #include <sys/dmu_send.h> |
03916905 | 61 | #include <sys/dmu_recv.h> |
47dfff3b MA |
62 | #include <sys/zio_compress.h> |
63 | #include <zfs_fletcher.h> | |
3c67d83a | 64 | #include <sys/zio_checksum.h> |
34dc7c2f | 65 | |
f1512ee6 MA |
66 | /* |
67 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
68 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
69 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
70 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
71 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
72 | * and pools with larger blocks can always be imported and used, regardless | |
73 | * of this setting. | |
74 | */ | |
75 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
30af21b0 | 76 | int zfs_allow_redacted_dataset_mount = 0; |
f1512ee6 | 77 | |
428870ff BB |
78 | #define SWITCH64(x, y) \ |
79 | { \ | |
80 | uint64_t __tmp = (x); \ | |
81 | (x) = (y); \ | |
82 | (y) = __tmp; \ | |
83 | } | |
84 | ||
34dc7c2f BB |
85 | #define DS_REF_MAX (1ULL << 62) |
86 | ||
d683ddbb | 87 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 88 | |
a1d477c2 MA |
89 | static void dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, |
90 | uint64_t obj, dmu_tx_t *tx); | |
91 | static void dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, | |
92 | dmu_tx_t *tx); | |
93 | ||
d52d80b7 PD |
94 | static void unload_zfeature(dsl_dataset_t *ds, spa_feature_t f); |
95 | ||
8c62a0d0 DM |
96 | extern int spa_asize_inflation; |
97 | ||
0efd9791 AG |
98 | static zil_header_t zero_zil; |
99 | ||
34dc7c2f | 100 | /* |
4e33ba4c | 101 | * Figure out how much of this delta should be propagated to the dsl_dir |
34dc7c2f BB |
102 | * layer. If there's a refreservation, that space has already been |
103 | * partially accounted for in our ancestors. | |
104 | */ | |
105 | static int64_t | |
106 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
107 | { | |
d683ddbb | 108 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
109 | uint64_t old_bytes, new_bytes; |
110 | ||
111 | if (ds->ds_reserved == 0) | |
112 | return (delta); | |
113 | ||
d683ddbb JG |
114 | ds_phys = dsl_dataset_phys(ds); |
115 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
116 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
34dc7c2f BB |
117 | |
118 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
119 | return (new_bytes - old_bytes); | |
120 | } | |
121 | ||
122 | void | |
428870ff | 123 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 124 | { |
37f03da8 SH |
125 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
126 | int used = bp_get_dsize_sync(spa, bp); | |
127 | int compressed = BP_GET_PSIZE(bp); | |
128 | int uncompressed = BP_GET_UCSIZE(bp); | |
34dc7c2f BB |
129 | int64_t delta; |
130 | ||
428870ff | 131 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
132 | |
133 | ASSERT(dmu_tx_is_syncing(tx)); | |
134 | /* It could have been compressed away to nothing */ | |
30af21b0 | 135 | if (BP_IS_HOLE(bp) || BP_IS_REDACTED(bp)) |
34dc7c2f BB |
136 | return; |
137 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 138 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 139 | if (ds == NULL) { |
29809a6c MA |
140 | dsl_pool_mos_diduse_space(tx->tx_pool, |
141 | used, compressed, uncompressed); | |
34dc7c2f BB |
142 | return; |
143 | } | |
428870ff | 144 | |
0efd9791 | 145 | ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); |
a169a625 | 146 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
147 | mutex_enter(&ds->ds_lock); |
148 | delta = parent_delta(ds, used); | |
d683ddbb JG |
149 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
150 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
151 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
152 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
3c67d83a | 153 | |
241b5415 | 154 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
d52d80b7 PD |
155 | ds->ds_feature_activation[SPA_FEATURE_LARGE_BLOCKS] = |
156 | (void *)B_TRUE; | |
241b5415 | 157 | } |
3c67d83a | 158 | |
1c27024e | 159 | spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); |
d52d80b7 PD |
160 | if (f != SPA_FEATURE_NONE) { |
161 | ASSERT3S(spa_feature_table[f].fi_type, ==, | |
162 | ZFEATURE_TYPE_BOOLEAN); | |
163 | ds->ds_feature_activation[f] = (void *)B_TRUE; | |
164 | } | |
3c67d83a | 165 | |
37f03da8 SH |
166 | /* |
167 | * Track block for livelist, but ignore embedded blocks because | |
168 | * they do not need to be freed. | |
169 | */ | |
170 | if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist) && | |
171 | bp->blk_birth > ds->ds_dir->dd_origin_txg && | |
172 | !(BP_IS_EMBEDDED(bp))) { | |
173 | ASSERT(dsl_dir_is_clone(ds->ds_dir)); | |
174 | ASSERT(spa_feature_is_enabled(spa, | |
175 | SPA_FEATURE_LIVELIST)); | |
176 | bplist_append(&ds->ds_dir->dd_pending_allocs, bp); | |
177 | } | |
178 | ||
34dc7c2f | 179 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
180 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
181 | compressed, uncompressed, tx); | |
182 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
183 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
184 | } |
185 | ||
a1d477c2 MA |
186 | /* |
187 | * Called when the specified segment has been remapped, and is thus no | |
188 | * longer referenced in the head dataset. The vdev must be indirect. | |
189 | * | |
190 | * If the segment is referenced by a snapshot, put it on the remap deadlist. | |
191 | * Otherwise, add this segment to the obsolete spacemap. | |
192 | */ | |
193 | void | |
194 | dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, uint64_t offset, | |
195 | uint64_t size, uint64_t birth, dmu_tx_t *tx) | |
196 | { | |
197 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
198 | ||
199 | ASSERT(dmu_tx_is_syncing(tx)); | |
200 | ASSERT(birth <= tx->tx_txg); | |
201 | ASSERT(!ds->ds_is_snapshot); | |
202 | ||
203 | if (birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { | |
204 | spa_vdev_indirect_mark_obsolete(spa, vdev, offset, size, tx); | |
205 | } else { | |
206 | blkptr_t fakebp; | |
207 | dva_t *dva = &fakebp.blk_dva[0]; | |
208 | ||
209 | ASSERT(ds != NULL); | |
210 | ||
211 | mutex_enter(&ds->ds_remap_deadlist_lock); | |
212 | if (!dsl_dataset_remap_deadlist_exists(ds)) { | |
213 | dsl_dataset_create_remap_deadlist(ds, tx); | |
214 | } | |
215 | mutex_exit(&ds->ds_remap_deadlist_lock); | |
216 | ||
217 | BP_ZERO(&fakebp); | |
218 | fakebp.blk_birth = birth; | |
219 | DVA_SET_VDEV(dva, vdev); | |
220 | DVA_SET_OFFSET(dva, offset); | |
221 | DVA_SET_ASIZE(dva, size); | |
37f03da8 SH |
222 | dsl_deadlist_insert(&ds->ds_remap_deadlist, &fakebp, B_FALSE, |
223 | tx); | |
a1d477c2 MA |
224 | } |
225 | } | |
226 | ||
b128c09f | 227 | int |
428870ff BB |
228 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
229 | boolean_t async) | |
34dc7c2f | 230 | { |
d2734cce SD |
231 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
232 | ||
233 | int used = bp_get_dsize_sync(spa, bp); | |
b0bc7a84 MG |
234 | int compressed = BP_GET_PSIZE(bp); |
235 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 236 | |
30af21b0 | 237 | if (BP_IS_HOLE(bp) || BP_IS_REDACTED(bp)) |
b128c09f | 238 | return (0); |
34dc7c2f | 239 | |
428870ff BB |
240 | ASSERT(dmu_tx_is_syncing(tx)); |
241 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
242 | ||
34dc7c2f | 243 | if (ds == NULL) { |
428870ff | 244 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
245 | dsl_pool_mos_diduse_space(tx->tx_pool, |
246 | -used, -compressed, -uncompressed); | |
b128c09f | 247 | return (used); |
34dc7c2f BB |
248 | } |
249 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
250 | ||
0c66c32d | 251 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
252 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
253 | ||
37f03da8 SH |
254 | /* |
255 | * Track block for livelist, but ignore embedded blocks because | |
256 | * they do not need to be freed. | |
257 | */ | |
258 | if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist) && | |
259 | bp->blk_birth > ds->ds_dir->dd_origin_txg && | |
260 | !(BP_IS_EMBEDDED(bp))) { | |
261 | ASSERT(dsl_dir_is_clone(ds->ds_dir)); | |
262 | ASSERT(spa_feature_is_enabled(spa, | |
263 | SPA_FEATURE_LIVELIST)); | |
264 | bplist_append(&ds->ds_dir->dd_pending_frees, bp); | |
265 | } | |
266 | ||
d683ddbb | 267 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
268 | int64_t delta; |
269 | ||
428870ff BB |
270 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
271 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
272 | |
273 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 274 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
275 | !DS_UNIQUE_IS_ACCURATE(ds)); |
276 | delta = parent_delta(ds, -used); | |
d683ddbb | 277 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 278 | mutex_exit(&ds->ds_lock); |
b128c09f | 279 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 280 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
281 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
282 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
283 | } else { |
284 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
285 | if (async) { |
286 | /* | |
287 | * We are here as part of zio's write done callback, | |
288 | * which means we're a zio interrupt thread. We can't | |
289 | * call dsl_deadlist_insert() now because it may block | |
290 | * waiting for I/O. Instead, put bp on the deferred | |
291 | * queue and let dsl_pool_sync() finish the job. | |
292 | */ | |
293 | bplist_append(&ds->ds_pending_deadlist, bp); | |
294 | } else { | |
37f03da8 | 295 | dsl_deadlist_insert(&ds->ds_deadlist, bp, B_FALSE, tx); |
428870ff | 296 | } |
34dc7c2f | 297 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
298 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
299 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 300 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 301 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 302 | ds->ds_object && bp->blk_birth > |
d683ddbb | 303 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
304 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
305 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 306 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
307 | mutex_exit(&ds->ds_prev->ds_lock); |
308 | } | |
428870ff | 309 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
310 | dsl_dir_transfer_space(ds->ds_dir, used, |
311 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
312 | } | |
34dc7c2f | 313 | } |
30af21b0 PD |
314 | |
315 | dsl_bookmark_block_killed(ds, bp, tx); | |
316 | ||
34dc7c2f | 317 | mutex_enter(&ds->ds_lock); |
d683ddbb JG |
318 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
319 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
320 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
321 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
322 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
323 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 324 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
325 | |
326 | return (used); | |
34dc7c2f BB |
327 | } |
328 | ||
d52d80b7 PD |
329 | struct feature_type_uint64_array_arg { |
330 | uint64_t length; | |
331 | uint64_t *array; | |
332 | }; | |
333 | ||
334 | static void | |
335 | unload_zfeature(dsl_dataset_t *ds, spa_feature_t f) | |
336 | { | |
337 | switch (spa_feature_table[f].fi_type) { | |
338 | case ZFEATURE_TYPE_BOOLEAN: | |
339 | break; | |
340 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
341 | { | |
342 | struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f]; | |
343 | kmem_free(ftuaa->array, ftuaa->length * sizeof (uint64_t)); | |
344 | kmem_free(ftuaa, sizeof (*ftuaa)); | |
345 | break; | |
346 | } | |
347 | default: | |
348 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
349 | } | |
350 | } | |
351 | ||
352 | static int | |
353 | load_zfeature(objset_t *mos, dsl_dataset_t *ds, spa_feature_t f) | |
354 | { | |
355 | int err = 0; | |
356 | switch (spa_feature_table[f].fi_type) { | |
357 | case ZFEATURE_TYPE_BOOLEAN: | |
358 | err = zap_contains(mos, ds->ds_object, | |
359 | spa_feature_table[f].fi_guid); | |
360 | if (err == 0) { | |
361 | ds->ds_feature[f] = (void *)B_TRUE; | |
362 | } else { | |
363 | ASSERT3U(err, ==, ENOENT); | |
364 | err = 0; | |
365 | } | |
366 | break; | |
367 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
368 | { | |
369 | uint64_t int_size, num_int; | |
370 | uint64_t *data; | |
371 | err = zap_length(mos, ds->ds_object, | |
372 | spa_feature_table[f].fi_guid, &int_size, &num_int); | |
373 | if (err != 0) { | |
374 | ASSERT3U(err, ==, ENOENT); | |
375 | err = 0; | |
376 | break; | |
377 | } | |
378 | ASSERT3U(int_size, ==, sizeof (uint64_t)); | |
379 | data = kmem_alloc(int_size * num_int, KM_SLEEP); | |
380 | VERIFY0(zap_lookup(mos, ds->ds_object, | |
381 | spa_feature_table[f].fi_guid, int_size, num_int, data)); | |
382 | struct feature_type_uint64_array_arg *ftuaa = | |
383 | kmem_alloc(sizeof (*ftuaa), KM_SLEEP); | |
384 | ftuaa->length = num_int; | |
385 | ftuaa->array = data; | |
386 | ds->ds_feature[f] = ftuaa; | |
387 | break; | |
388 | } | |
389 | default: | |
390 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
391 | } | |
392 | return (err); | |
393 | } | |
394 | ||
39efbde7 | 395 | /* |
e1cfd73f | 396 | * We have to release the fsid synchronously or we risk that a subsequent |
39efbde7 GM |
397 | * mount of the same dataset will fail to unique_insert the fsid. This |
398 | * failure would manifest itself as the fsid of this dataset changing | |
399 | * between mounts which makes NFS clients quite unhappy. | |
400 | */ | |
34dc7c2f | 401 | static void |
39efbde7 | 402 | dsl_dataset_evict_sync(void *dbu) |
34dc7c2f | 403 | { |
0c66c32d | 404 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 405 | |
13fe0198 | 406 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 407 | |
34dc7c2f | 408 | unique_remove(ds->ds_fsid_guid); |
39efbde7 GM |
409 | } |
410 | ||
411 | static void | |
412 | dsl_dataset_evict_async(void *dbu) | |
413 | { | |
414 | dsl_dataset_t *ds = dbu; | |
415 | ||
416 | ASSERT(ds->ds_owner == NULL); | |
417 | ||
418 | ds->ds_dbuf = NULL; | |
34dc7c2f | 419 | |
428870ff BB |
420 | if (ds->ds_objset != NULL) |
421 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
422 | |
423 | if (ds->ds_prev) { | |
13fe0198 | 424 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
425 | ds->ds_prev = NULL; |
426 | } | |
427 | ||
30af21b0 PD |
428 | dsl_bookmark_fini_ds(ds); |
429 | ||
428870ff | 430 | bplist_destroy(&ds->ds_pending_deadlist); |
a1d477c2 | 431 | if (dsl_deadlist_is_open(&ds->ds_deadlist)) |
428870ff | 432 | dsl_deadlist_close(&ds->ds_deadlist); |
a1d477c2 MA |
433 | if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) |
434 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
b128c09f | 435 | if (ds->ds_dir) |
0c66c32d | 436 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
437 | |
438 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
439 | ||
d52d80b7 PD |
440 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
441 | if (dsl_dataset_feature_is_active(ds, f)) | |
442 | unload_zfeature(ds, f); | |
443 | } | |
444 | ||
0eb21616 | 445 | list_destroy(&ds->ds_prop_cbs); |
34dc7c2f BB |
446 | mutex_destroy(&ds->ds_lock); |
447 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 448 | mutex_destroy(&ds->ds_sendstream_lock); |
a1d477c2 | 449 | mutex_destroy(&ds->ds_remap_deadlist_lock); |
424fd7c3 | 450 | zfs_refcount_destroy(&ds->ds_longholds); |
cc9bb3e5 | 451 | rrw_destroy(&ds->ds_bp_rwlock); |
34dc7c2f BB |
452 | |
453 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
454 | } | |
455 | ||
13fe0198 | 456 | int |
34dc7c2f BB |
457 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
458 | { | |
459 | dsl_dataset_phys_t *headphys; | |
460 | int err; | |
461 | dmu_buf_t *headdbuf; | |
462 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
463 | objset_t *mos = dp->dp_meta_objset; | |
464 | ||
465 | if (ds->ds_snapname[0]) | |
466 | return (0); | |
d683ddbb | 467 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
468 | return (0); |
469 | ||
d683ddbb | 470 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 471 | FTAG, &headdbuf); |
13fe0198 | 472 | if (err != 0) |
34dc7c2f BB |
473 | return (err); |
474 | headphys = headdbuf->db_data; | |
475 | err = zap_value_search(dp->dp_meta_objset, | |
476 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
477 | if (err != 0 && zfs_recover == B_TRUE) { |
478 | err = 0; | |
479 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
480 | "SNAPOBJ=%llu-ERR=%d", | |
481 | (unsigned long long)ds->ds_object, err); | |
482 | } | |
34dc7c2f BB |
483 | dmu_buf_rele(headdbuf, FTAG); |
484 | return (err); | |
485 | } | |
486 | ||
6772fb67 | 487 | int |
b128c09f | 488 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 489 | { |
b128c09f | 490 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 491 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 492 | matchtype_t mt = 0; |
34dc7c2f BB |
493 | int err; |
494 | ||
d683ddbb | 495 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 496 | mt = MT_NORMALIZE; |
34dc7c2f | 497 | |
b128c09f | 498 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f | 499 | value, mt, NULL, 0, NULL); |
9b7b9cd3 | 500 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 501 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
502 | return (err); |
503 | } | |
504 | ||
13fe0198 | 505 | int |
788eb90c JJ |
506 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
507 | boolean_t adj_cnt) | |
34dc7c2f | 508 | { |
b128c09f | 509 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 510 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 511 | matchtype_t mt = 0; |
34dc7c2f BB |
512 | int err; |
513 | ||
428870ff BB |
514 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
515 | ||
d683ddbb | 516 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 517 | mt = MT_NORMALIZE; |
34dc7c2f | 518 | |
b128c09f | 519 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
9b7b9cd3 | 520 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 521 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
522 | |
523 | if (err == 0 && adj_cnt) | |
524 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
525 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
526 | ||
34dc7c2f BB |
527 | return (err); |
528 | } | |
529 | ||
6ebebace JG |
530 | boolean_t |
531 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
532 | { | |
6186e297 JG |
533 | dmu_buf_t *dbuf = ds->ds_dbuf; |
534 | boolean_t result = B_FALSE; | |
535 | ||
536 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
537 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
538 | ||
539 | if (ds == dmu_buf_get_user(dbuf)) | |
540 | result = B_TRUE; | |
541 | else | |
542 | dmu_buf_rele(dbuf, tag); | |
543 | } | |
544 | ||
545 | return (result); | |
6ebebace JG |
546 | } |
547 | ||
13fe0198 | 548 | int |
52ce99dd TC |
549 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
550 | dsl_dataset_t **dsp) | |
34dc7c2f | 551 | { |
34dc7c2f BB |
552 | objset_t *mos = dp->dp_meta_objset; |
553 | dmu_buf_t *dbuf; | |
554 | dsl_dataset_t *ds; | |
555 | int err; | |
572e2857 | 556 | dmu_object_info_t doi; |
34dc7c2f | 557 | |
13fe0198 | 558 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
559 | |
560 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 561 | if (err != 0) |
34dc7c2f | 562 | return (err); |
572e2857 BB |
563 | |
564 | /* Make sure dsobj has the correct object type. */ | |
565 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 566 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 567 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 568 | return (SET_ERROR(EINVAL)); |
3a84951d | 569 | } |
572e2857 | 570 | |
34dc7c2f BB |
571 | ds = dmu_buf_get_user(dbuf); |
572 | if (ds == NULL) { | |
d4ed6673 | 573 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 574 | |
79c76d5b | 575 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
576 | ds->ds_dbuf = dbuf; |
577 | ds->ds_object = dsobj; | |
0c66c32d | 578 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 579 | list_link_init(&ds->ds_synced_link); |
34dc7c2f | 580 | |
a1d477c2 MA |
581 | err = dsl_dir_hold_obj(dp, dsl_dataset_phys(ds)->ds_dir_obj, |
582 | NULL, ds, &ds->ds_dir); | |
583 | if (err != 0) { | |
584 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
585 | dmu_buf_rele(dbuf, tag); | |
586 | return (err); | |
587 | } | |
588 | ||
34dc7c2f BB |
589 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
590 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 591 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
a1d477c2 MA |
592 | mutex_init(&ds->ds_remap_deadlist_lock, |
593 | NULL, MUTEX_DEFAULT, NULL); | |
cc9bb3e5 | 594 | rrw_init(&ds->ds_bp_rwlock, B_FALSE); |
424fd7c3 | 595 | zfs_refcount_create(&ds->ds_longholds); |
34dc7c2f | 596 | |
428870ff | 597 | bplist_create(&ds->ds_pending_deadlist); |
428870ff | 598 | |
30af21b0 PD |
599 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendstatus_t), |
600 | offsetof(dmu_sendstatus_t, dss_link)); | |
37abac6d | 601 | |
0eb21616 JG |
602 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
603 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
604 | ||
f1512ee6 | 605 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
606 | spa_feature_t f; |
607 | ||
608 | for (f = 0; f < SPA_FEATURES; f++) { | |
609 | if (!(spa_feature_table[f].fi_flags & | |
610 | ZFEATURE_FLAG_PER_DATASET)) | |
611 | continue; | |
d52d80b7 | 612 | err = load_zfeature(mos, ds, f); |
19b3b1d2 | 613 | } |
f1512ee6 MA |
614 | } |
615 | ||
0c66c32d | 616 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 617 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 618 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 619 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 620 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 621 | ds, &ds->ds_prev); |
34dc7c2f | 622 | } |
30af21b0 | 623 | err = dsl_bookmark_init_ds(ds); |
45d1cae3 BB |
624 | } else { |
625 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
626 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
627 | if (err == 0 && |
628 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
629 | err = zap_count( |
630 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 631 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
632 | &ds->ds_userrefs); |
633 | } | |
34dc7c2f BB |
634 | } |
635 | ||
0c66c32d | 636 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
637 | err = dsl_prop_get_int_ds(ds, |
638 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
639 | &ds->ds_reserved); | |
34dc7c2f | 640 | if (err == 0) { |
13fe0198 MA |
641 | err = dsl_prop_get_int_ds(ds, |
642 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
643 | &ds->ds_quota); | |
34dc7c2f | 644 | } |
34dc7c2f BB |
645 | } else { |
646 | ds->ds_reserved = ds->ds_quota = 0; | |
647 | } | |
648 | ||
f00ab3f2 TC |
649 | if (err == 0 && ds->ds_dir->dd_crypto_obj != 0 && |
650 | ds->ds_is_snapshot && | |
651 | zap_contains(mos, dsobj, DS_FIELD_IVSET_GUID) != 0) { | |
652 | dp->dp_spa->spa_errata = | |
653 | ZPOOL_ERRATA_ZOL_8308_ENCRYPTION; | |
654 | } | |
655 | ||
a1d477c2 MA |
656 | dsl_deadlist_open(&ds->ds_deadlist, |
657 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); | |
658 | uint64_t remap_deadlist_obj = | |
659 | dsl_dataset_get_remap_deadlist_object(ds); | |
660 | if (remap_deadlist_obj != 0) { | |
661 | dsl_deadlist_open(&ds->ds_remap_deadlist, mos, | |
662 | remap_deadlist_obj); | |
663 | } | |
664 | ||
39efbde7 GM |
665 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync, |
666 | dsl_dataset_evict_async, &ds->ds_dbuf); | |
0c66c32d JG |
667 | if (err == 0) |
668 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
669 | ||
670 | if (err != 0 || winner != NULL) { | |
428870ff BB |
671 | bplist_destroy(&ds->ds_pending_deadlist); |
672 | dsl_deadlist_close(&ds->ds_deadlist); | |
a1d477c2 MA |
673 | if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) |
674 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
30af21b0 | 675 | dsl_bookmark_fini_ds(ds); |
b128c09f | 676 | if (ds->ds_prev) |
13fe0198 MA |
677 | dsl_dataset_rele(ds->ds_prev, ds); |
678 | dsl_dir_rele(ds->ds_dir, ds); | |
30af21b0 PD |
679 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
680 | if (dsl_dataset_feature_is_active(ds, f)) | |
681 | unload_zfeature(ds, f); | |
682 | } | |
683 | ||
d10b2f1d JL |
684 | list_destroy(&ds->ds_prop_cbs); |
685 | list_destroy(&ds->ds_sendstreams); | |
34dc7c2f BB |
686 | mutex_destroy(&ds->ds_lock); |
687 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 688 | mutex_destroy(&ds->ds_sendstream_lock); |
d10b2f1d | 689 | mutex_destroy(&ds->ds_remap_deadlist_lock); |
424fd7c3 | 690 | zfs_refcount_destroy(&ds->ds_longholds); |
d10b2f1d | 691 | rrw_destroy(&ds->ds_bp_rwlock); |
34dc7c2f | 692 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 693 | if (err != 0) { |
34dc7c2f BB |
694 | dmu_buf_rele(dbuf, tag); |
695 | return (err); | |
696 | } | |
697 | ds = winner; | |
698 | } else { | |
699 | ds->ds_fsid_guid = | |
d683ddbb | 700 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
39efbde7 GM |
701 | if (ds->ds_fsid_guid != |
702 | dsl_dataset_phys(ds)->ds_fsid_guid) { | |
703 | zfs_dbgmsg("ds_fsid_guid changed from " | |
704 | "%llx to %llx for pool %s dataset id %llu", | |
705 | (long long) | |
706 | dsl_dataset_phys(ds)->ds_fsid_guid, | |
707 | (long long)ds->ds_fsid_guid, | |
708 | spa_name(dp->dp_spa), | |
709 | dsobj); | |
710 | } | |
34dc7c2f BB |
711 | } |
712 | } | |
52ce99dd | 713 | |
34dc7c2f | 714 | ASSERT3P(ds->ds_dbuf, ==, dbuf); |
d683ddbb JG |
715 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
716 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
717 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
718 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f | 719 | *dsp = ds; |
b5256303 | 720 | |
34dc7c2f BB |
721 | return (0); |
722 | } | |
723 | ||
b128c09f | 724 | int |
52ce99dd TC |
725 | dsl_dataset_create_key_mapping(dsl_dataset_t *ds) |
726 | { | |
727 | dsl_dir_t *dd = ds->ds_dir; | |
728 | ||
729 | if (dd->dd_crypto_obj == 0) | |
730 | return (0); | |
731 | ||
732 | return (spa_keystore_create_mapping(dd->dd_pool->dp_spa, | |
733 | ds, ds, &ds->ds_key_mapping)); | |
734 | } | |
735 | ||
736 | int | |
737 | dsl_dataset_hold_obj_flags(dsl_pool_t *dp, uint64_t dsobj, | |
738 | ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp) | |
b5256303 | 739 | { |
52ce99dd TC |
740 | int err; |
741 | ||
742 | err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); | |
743 | if (err != 0) | |
744 | return (err); | |
745 | ||
746 | ASSERT3P(*dsp, !=, NULL); | |
747 | ||
748 | if (flags & DS_HOLD_FLAG_DECRYPT) { | |
749 | err = dsl_dataset_create_key_mapping(*dsp); | |
750 | if (err != 0) | |
751 | dsl_dataset_rele(*dsp, tag); | |
752 | } | |
753 | ||
754 | return (err); | |
b5256303 TC |
755 | } |
756 | ||
757 | int | |
758 | dsl_dataset_hold_flags(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
428870ff | 759 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
760 | { |
761 | dsl_dir_t *dd; | |
b128c09f | 762 | const char *snapname; |
34dc7c2f | 763 | uint64_t obj; |
34dc7c2f | 764 | int err = 0; |
fcff0f35 | 765 | dsl_dataset_t *ds; |
34dc7c2f | 766 | |
13fe0198 MA |
767 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
768 | if (err != 0) | |
34dc7c2f BB |
769 | return (err); |
770 | ||
13fe0198 | 771 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 772 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 | 773 | if (obj != 0) |
b5256303 | 774 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, &ds); |
b128c09f | 775 | else |
2e528b49 | 776 | err = SET_ERROR(ENOENT); |
34dc7c2f | 777 | |
b128c09f BB |
778 | /* we may be looking for a snapshot */ |
779 | if (err == 0 && snapname != NULL) { | |
fcff0f35 | 780 | dsl_dataset_t *snap_ds; |
34dc7c2f | 781 | |
b128c09f | 782 | if (*snapname++ != '@') { |
b5256303 | 783 | dsl_dataset_rele_flags(ds, flags, tag); |
13fe0198 | 784 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 785 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 786 | } |
34dc7c2f | 787 | |
b128c09f | 788 | dprintf("looking for snapshot '%s'\n", snapname); |
fcff0f35 | 789 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
b5256303 TC |
790 | if (err == 0) { |
791 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, | |
792 | &snap_ds); | |
793 | } | |
794 | dsl_dataset_rele_flags(ds, flags, tag); | |
b128c09f | 795 | |
13fe0198 | 796 | if (err == 0) { |
fcff0f35 PD |
797 | mutex_enter(&snap_ds->ds_lock); |
798 | if (snap_ds->ds_snapname[0] == 0) | |
799 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
800 | sizeof (snap_ds->ds_snapname)); | |
801 | mutex_exit(&snap_ds->ds_lock); | |
802 | ds = snap_ds; | |
34dc7c2f | 803 | } |
34dc7c2f | 804 | } |
fcff0f35 PD |
805 | if (err == 0) |
806 | *dsp = ds; | |
13fe0198 | 807 | dsl_dir_rele(dd, FTAG); |
34dc7c2f BB |
808 | return (err); |
809 | } | |
810 | ||
811 | int | |
b5256303 TC |
812 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, void *tag, |
813 | dsl_dataset_t **dsp) | |
814 | { | |
815 | return (dsl_dataset_hold_flags(dp, name, 0, tag, dsp)); | |
816 | } | |
817 | ||
30af21b0 PD |
818 | static int |
819 | dsl_dataset_own_obj_impl(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags, | |
820 | void *tag, boolean_t override, dsl_dataset_t **dsp) | |
34dc7c2f | 821 | { |
b5256303 | 822 | int err = dsl_dataset_hold_obj_flags(dp, dsobj, flags, tag, dsp); |
13fe0198 MA |
823 | if (err != 0) |
824 | return (err); | |
30af21b0 | 825 | if (!dsl_dataset_tryown(*dsp, tag, override)) { |
b5256303 | 826 | dsl_dataset_rele_flags(*dsp, flags, tag); |
13fe0198 | 827 | *dsp = NULL; |
2e528b49 | 828 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
829 | } |
830 | return (0); | |
831 | } | |
832 | ||
30af21b0 | 833 | |
13fe0198 | 834 | int |
30af21b0 | 835 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags, |
13fe0198 | 836 | void *tag, dsl_dataset_t **dsp) |
30af21b0 PD |
837 | { |
838 | return (dsl_dataset_own_obj_impl(dp, dsobj, flags, tag, B_FALSE, dsp)); | |
839 | } | |
840 | ||
841 | int | |
842 | dsl_dataset_own_obj_force(dsl_pool_t *dp, uint64_t dsobj, | |
843 | ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp) | |
844 | { | |
845 | return (dsl_dataset_own_obj_impl(dp, dsobj, flags, tag, B_TRUE, dsp)); | |
846 | } | |
847 | ||
848 | static int | |
849 | dsl_dataset_own_impl(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
850 | void *tag, boolean_t override, dsl_dataset_t **dsp) | |
13fe0198 | 851 | { |
b5256303 | 852 | int err = dsl_dataset_hold_flags(dp, name, flags, tag, dsp); |
13fe0198 | 853 | if (err != 0) |
b128c09f | 854 | return (err); |
30af21b0 | 855 | if (!dsl_dataset_tryown(*dsp, tag, override)) { |
b5256303 | 856 | dsl_dataset_rele_flags(*dsp, flags, tag); |
2e528b49 | 857 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
858 | } |
859 | return (0); | |
34dc7c2f BB |
860 | } |
861 | ||
30af21b0 PD |
862 | int |
863 | dsl_dataset_own_force(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
864 | void *tag, dsl_dataset_t **dsp) | |
865 | { | |
866 | return (dsl_dataset_own_impl(dp, name, flags, tag, B_TRUE, dsp)); | |
867 | } | |
868 | ||
869 | int | |
870 | dsl_dataset_own(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
871 | void *tag, dsl_dataset_t **dsp) | |
872 | { | |
873 | return (dsl_dataset_own_impl(dp, name, flags, tag, B_FALSE, dsp)); | |
874 | } | |
875 | ||
13fe0198 MA |
876 | /* |
877 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
878 | * hold is used to prevent destruction of a dataset while the pool hold | |
879 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
880 | * | |
881 | * The dataset and pool must be held when this function is called. After it | |
882 | * is called, the pool hold may be released while the dataset is still held | |
883 | * and accessed. | |
884 | */ | |
885 | void | |
886 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
887 | { | |
888 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
c13060e4 | 889 | (void) zfs_refcount_add(&ds->ds_longholds, tag); |
13fe0198 MA |
890 | } |
891 | ||
892 | void | |
893 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
894 | { | |
424fd7c3 | 895 | (void) zfs_refcount_remove(&ds->ds_longholds, tag); |
13fe0198 MA |
896 | } |
897 | ||
898 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
899 | boolean_t | |
900 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
901 | { | |
424fd7c3 | 902 | return (!zfs_refcount_is_zero(&ds->ds_longholds)); |
13fe0198 MA |
903 | } |
904 | ||
34dc7c2f BB |
905 | void |
906 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
907 | { | |
908 | if (ds == NULL) { | |
909 | (void) strcpy(name, "mos"); | |
910 | } else { | |
911 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 912 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f | 913 | if (ds->ds_snapname[0]) { |
eca7b760 IK |
914 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
915 | <, ZFS_MAX_DATASET_NAME_LEN); | |
b128c09f BB |
916 | /* |
917 | * We use a "recursive" mutex so that we | |
918 | * can call dprintf_ds() with ds_lock held. | |
919 | */ | |
34dc7c2f | 920 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f | 921 | mutex_enter(&ds->ds_lock); |
eca7b760 IK |
922 | VERIFY3U(strlcat(name, ds->ds_snapname, |
923 | ZFS_MAX_DATASET_NAME_LEN), <, | |
924 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
925 | mutex_exit(&ds->ds_lock); |
926 | } else { | |
eca7b760 IK |
927 | VERIFY3U(strlcat(name, ds->ds_snapname, |
928 | ZFS_MAX_DATASET_NAME_LEN), <, | |
929 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
930 | } |
931 | } | |
932 | } | |
933 | } | |
934 | ||
eca7b760 IK |
935 | int |
936 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
937 | { | |
eca7b760 IK |
938 | VERIFY0(dsl_dataset_get_snapname(ds)); |
939 | mutex_enter(&ds->ds_lock); | |
1c27024e | 940 | int len = strlen(ds->ds_snapname); |
1118f994 | 941 | mutex_exit(&ds->ds_lock); |
a806cb6a CC |
942 | /* add '@' if ds is a snap */ |
943 | if (len > 0) | |
944 | len++; | |
945 | len += dsl_dir_namelen(ds->ds_dir); | |
eca7b760 IK |
946 | return (len); |
947 | } | |
948 | ||
34dc7c2f | 949 | void |
52ce99dd | 950 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
b128c09f | 951 | { |
13fe0198 | 952 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
953 | } |
954 | ||
955 | void | |
52ce99dd TC |
956 | dsl_dataset_remove_key_mapping(dsl_dataset_t *ds) |
957 | { | |
958 | dsl_dir_t *dd = ds->ds_dir; | |
959 | ||
960 | if (dd == NULL || dd->dd_crypto_obj == 0) | |
961 | return; | |
962 | ||
963 | (void) spa_keystore_remove_mapping(dd->dd_pool->dp_spa, | |
964 | ds->ds_object, ds); | |
965 | } | |
966 | ||
967 | void | |
968 | dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) | |
b5256303 | 969 | { |
52ce99dd TC |
970 | if (flags & DS_HOLD_FLAG_DECRYPT) |
971 | dsl_dataset_remove_key_mapping(ds); | |
972 | ||
973 | dsl_dataset_rele(ds, tag); | |
b5256303 TC |
974 | } |
975 | ||
976 | void | |
977 | dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) | |
34dc7c2f | 978 | { |
945dd935 JG |
979 | ASSERT3P(ds->ds_owner, ==, tag); |
980 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 981 | |
34dc7c2f | 982 | mutex_enter(&ds->ds_lock); |
b128c09f | 983 | ds->ds_owner = NULL; |
34dc7c2f | 984 | mutex_exit(&ds->ds_lock); |
13fe0198 | 985 | dsl_dataset_long_rele(ds, tag); |
b5256303 | 986 | dsl_dataset_rele_flags(ds, flags, tag); |
34dc7c2f BB |
987 | } |
988 | ||
989 | boolean_t | |
30af21b0 | 990 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag, boolean_t override) |
34dc7c2f | 991 | { |
b128c09f BB |
992 | boolean_t gotit = FALSE; |
993 | ||
47dfff3b | 994 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
34dc7c2f | 995 | mutex_enter(&ds->ds_lock); |
30af21b0 PD |
996 | if (ds->ds_owner == NULL && (override || !(DS_IS_INCONSISTENT(ds) || |
997 | (dsl_dataset_feature_is_active(ds, | |
998 | SPA_FEATURE_REDACTED_DATASETS) && | |
999 | !zfs_allow_redacted_dataset_mount)))) { | |
428870ff | 1000 | ds->ds_owner = tag; |
13fe0198 | 1001 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 1002 | gotit = TRUE; |
34dc7c2f BB |
1003 | } |
1004 | mutex_exit(&ds->ds_lock); | |
b128c09f | 1005 | return (gotit); |
34dc7c2f BB |
1006 | } |
1007 | ||
47dfff3b MA |
1008 | boolean_t |
1009 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
1010 | { | |
1011 | boolean_t rv; | |
1012 | mutex_enter(&ds->ds_lock); | |
1013 | rv = (ds->ds_owner != NULL); | |
1014 | mutex_exit(&ds->ds_lock); | |
1015 | return (rv); | |
1016 | } | |
1017 | ||
d52d80b7 PD |
1018 | static boolean_t |
1019 | zfeature_active(spa_feature_t f, void *arg) | |
1020 | { | |
1021 | switch (spa_feature_table[f].fi_type) { | |
1022 | case ZFEATURE_TYPE_BOOLEAN: { | |
1023 | boolean_t val = (boolean_t)arg; | |
1024 | ASSERT(val == B_FALSE || val == B_TRUE); | |
1025 | return (val); | |
1026 | } | |
1027 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
1028 | /* | |
1029 | * In this case, arg is a uint64_t array. The feature is active | |
1030 | * if the array is non-null. | |
1031 | */ | |
1032 | return (arg != NULL); | |
1033 | default: | |
1034 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
1035 | return (B_FALSE); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | boolean_t | |
1040 | dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f) | |
1041 | { | |
1042 | return (zfeature_active(f, ds->ds_feature[f])); | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * The buffers passed out by this function are references to internal buffers; | |
1047 | * they should not be freed by callers of this function, and they should not be | |
1048 | * used after the dataset has been released. | |
1049 | */ | |
1050 | boolean_t | |
1051 | dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds, spa_feature_t f, | |
1052 | uint64_t *outlength, uint64_t **outp) | |
1053 | { | |
1054 | VERIFY(spa_feature_table[f].fi_type & ZFEATURE_TYPE_UINT64_ARRAY); | |
1055 | if (!dsl_dataset_feature_is_active(ds, f)) { | |
1056 | return (B_FALSE); | |
1057 | } | |
1058 | struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f]; | |
1059 | *outp = ftuaa->array; | |
1060 | *outlength = ftuaa->length; | |
1061 | return (B_TRUE); | |
1062 | } | |
1063 | ||
b5256303 | 1064 | void |
d52d80b7 PD |
1065 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg, |
1066 | dmu_tx_t *tx) | |
241b5415 MA |
1067 | { |
1068 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
1069 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
1070 | uint64_t zero = 0; | |
1071 | ||
1072 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
1073 | ||
1074 | spa_feature_incr(spa, f, tx); | |
1075 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1076 | ||
d52d80b7 PD |
1077 | switch (spa_feature_table[f].fi_type) { |
1078 | case ZFEATURE_TYPE_BOOLEAN: | |
1079 | ASSERT3S((boolean_t)arg, ==, B_TRUE); | |
1080 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
1081 | sizeof (zero), 1, &zero, tx)); | |
1082 | break; | |
1083 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
1084 | { | |
1085 | struct feature_type_uint64_array_arg *ftuaa = arg; | |
1086 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
1087 | sizeof (uint64_t), ftuaa->length, ftuaa->array, tx)); | |
1088 | break; | |
1089 | } | |
1090 | default: | |
1091 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
1092 | } | |
241b5415 MA |
1093 | } |
1094 | ||
1095 | void | |
d52d80b7 PD |
1096 | dsl_dataset_deactivate_feature_impl(dsl_dataset_t *ds, spa_feature_t f, |
1097 | dmu_tx_t *tx) | |
241b5415 MA |
1098 | { |
1099 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
1100 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
d52d80b7 | 1101 | uint64_t dsobj = ds->ds_object; |
241b5415 MA |
1102 | |
1103 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
1104 | ||
1105 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
1106 | spa_feature_decr(spa, f, tx); | |
d52d80b7 PD |
1107 | ds->ds_feature[f] = NULL; |
1108 | } | |
1109 | ||
1110 | void | |
1111 | dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f, dmu_tx_t *tx) | |
1112 | { | |
1113 | unload_zfeature(ds, f); | |
1114 | dsl_dataset_deactivate_feature_impl(ds, f, tx); | |
241b5415 MA |
1115 | } |
1116 | ||
34dc7c2f | 1117 | uint64_t |
b128c09f | 1118 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
b5256303 | 1119 | dsl_crypto_params_t *dcp, uint64_t flags, dmu_tx_t *tx) |
34dc7c2f BB |
1120 | { |
1121 | dsl_pool_t *dp = dd->dd_pool; | |
1122 | dmu_buf_t *dbuf; | |
1123 | dsl_dataset_phys_t *dsphys; | |
1124 | uint64_t dsobj; | |
1125 | objset_t *mos = dp->dp_meta_objset; | |
1126 | ||
b128c09f BB |
1127 | if (origin == NULL) |
1128 | origin = dp->dp_origin_snap; | |
1129 | ||
34dc7c2f | 1130 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 1131 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 1132 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 1133 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
1134 | |
1135 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
1136 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1137 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1138 | dmu_buf_will_dirty(dbuf, tx); |
1139 | dsphys = dbuf->db_data; | |
b128c09f | 1140 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1141 | dsphys->ds_dir_obj = dd->dd_object; |
1142 | dsphys->ds_flags = flags; | |
1143 | dsphys->ds_fsid_guid = unique_create(); | |
1144 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1145 | sizeof (dsphys->ds_guid)); | |
1146 | dsphys->ds_snapnames_zapobj = | |
1147 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
1148 | DMU_OT_NONE, 0, tx); | |
1149 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1150 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 1151 | |
428870ff BB |
1152 | if (origin == NULL) { |
1153 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
1154 | } else { | |
13fe0198 | 1155 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 1156 | |
34dc7c2f BB |
1157 | dsphys->ds_prev_snap_obj = origin->ds_object; |
1158 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 1159 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 1160 | dsphys->ds_referenced_bytes = |
d683ddbb | 1161 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 1162 | dsphys->ds_compressed_bytes = |
d683ddbb | 1163 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 1164 | dsphys->ds_uncompressed_bytes = |
d683ddbb | 1165 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
cc9bb3e5 | 1166 | rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 1167 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; |
cc9bb3e5 | 1168 | rrw_exit(&origin->ds_bp_rwlock, FTAG); |
4b20a6f5 MA |
1169 | |
1170 | /* | |
1171 | * Inherit flags that describe the dataset's contents | |
1172 | * (INCONSISTENT) or properties (Case Insensitive). | |
1173 | */ | |
d683ddbb | 1174 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 1175 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 1176 | |
1c27024e | 1177 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
1178 | if (zfeature_active(f, origin->ds_feature[f])) { |
1179 | dsl_dataset_activate_feature(dsobj, f, | |
1180 | origin->ds_feature[f], tx); | |
1181 | } | |
241b5415 | 1182 | } |
f1512ee6 | 1183 | |
34dc7c2f | 1184 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 1185 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 1186 | |
13fe0198 | 1187 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1188 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
1189 | FTAG, &ohds)); | |
428870ff BB |
1190 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
1191 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
1192 | dsl_dataset_rele(ohds, FTAG); | |
1193 | ||
b128c09f | 1194 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
1195 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
1196 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
1197 | zap_create(mos, |
1198 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
1199 | } | |
13fe0198 | 1200 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
1201 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
1202 | dsobj, tx)); | |
b128c09f BB |
1203 | } |
1204 | ||
34dc7c2f | 1205 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 1206 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 1207 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 1208 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 1209 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 1210 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
1211 | zap_create(mos, |
1212 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
1213 | } | |
13fe0198 | 1214 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
1215 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
1216 | dsobj, tx)); | |
428870ff | 1217 | } |
34dc7c2f BB |
1218 | } |
1219 | ||
b5256303 TC |
1220 | /* handle encryption */ |
1221 | dsl_dataset_create_crypt_sync(dsobj, dd, origin, dcp, tx); | |
1222 | ||
34dc7c2f BB |
1223 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
1224 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
1225 | ||
1226 | dmu_buf_rele(dbuf, FTAG); | |
1227 | ||
1228 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 1229 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
1230 | |
1231 | return (dsobj); | |
1232 | } | |
1233 | ||
13fe0198 MA |
1234 | static void |
1235 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1236 | { | |
1237 | objset_t *os; | |
1238 | ||
1239 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
0efd9791 AG |
1240 | if (bcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) { |
1241 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1242 | zio_t *zio; | |
1243 | ||
1244 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
b5256303 | 1245 | if (os->os_encrypted) |
1b66810b | 1246 | os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE; |
0efd9791 AG |
1247 | |
1248 | zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
1249 | dsl_dataset_sync(ds, zio, tx); | |
1250 | VERIFY0(zio_wait(zio)); | |
1251 | ||
1252 | /* dsl_dataset_sync_done will drop this reference. */ | |
1253 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1254 | dsl_dataset_sync_done(ds, tx); | |
1255 | } | |
13fe0198 MA |
1256 | } |
1257 | ||
34dc7c2f BB |
1258 | uint64_t |
1259 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
b5256303 TC |
1260 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, |
1261 | dsl_crypto_params_t *dcp, dmu_tx_t *tx) | |
34dc7c2f BB |
1262 | { |
1263 | dsl_pool_t *dp = pdd->dd_pool; | |
1264 | uint64_t dsobj, ddobj; | |
1265 | dsl_dir_t *dd; | |
1266 | ||
13fe0198 | 1267 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f | 1268 | ASSERT(lastname[0] != '@'); |
37f03da8 SH |
1269 | /* |
1270 | * Filesystems will eventually have their origin set to dp_origin_snap, | |
1271 | * but that's taken care of in dsl_dataset_create_sync_dd. When | |
1272 | * creating a filesystem, this function is called with origin equal to | |
1273 | * NULL. | |
1274 | */ | |
1275 | if (origin != NULL) | |
1276 | ASSERT3P(origin, !=, dp->dp_origin_snap); | |
34dc7c2f | 1277 | |
b128c09f | 1278 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 1279 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 1280 | |
b5256303 | 1281 | dsobj = dsl_dataset_create_sync_dd(dd, origin, dcp, |
13fe0198 | 1282 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); |
34dc7c2f BB |
1283 | |
1284 | dsl_deleg_set_create_perms(dd, tx, cr); | |
1285 | ||
37f03da8 SH |
1286 | /* |
1287 | * If we are creating a clone and the livelist feature is enabled, | |
1288 | * add the entry DD_FIELD_LIVELIST to ZAP. | |
1289 | */ | |
1290 | if (origin != NULL && | |
1291 | spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LIVELIST)) { | |
1292 | objset_t *mos = dd->dd_pool->dp_meta_objset; | |
1293 | dsl_dir_zapify(dd, tx); | |
1294 | uint64_t obj = dsl_deadlist_alloc(mos, tx); | |
1295 | VERIFY0(zap_add(mos, dd->dd_object, DD_FIELD_LIVELIST, | |
1296 | sizeof (uint64_t), 1, &obj, tx)); | |
1297 | spa_feature_incr(dp->dp_spa, SPA_FEATURE_LIVELIST, tx); | |
1298 | } | |
1299 | ||
788eb90c JJ |
1300 | /* |
1301 | * Since we're creating a new node we know it's a leaf, so we can | |
1302 | * initialize the counts if the limit feature is active. | |
1303 | */ | |
1304 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
1305 | uint64_t cnt = 0; | |
1306 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
1307 | ||
1308 | dsl_dir_zapify(dd, tx); | |
1309 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
1310 | sizeof (cnt), 1, &cnt, tx)); | |
1311 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
1312 | sizeof (cnt), 1, &cnt, tx)); | |
1313 | } | |
1314 | ||
13fe0198 | 1315 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 1316 | |
572e2857 BB |
1317 | /* |
1318 | * If we are creating a clone, make sure we zero out any stale | |
1319 | * data from the origin snapshots zil header. | |
1320 | */ | |
13fe0198 | 1321 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 1322 | dsl_dataset_t *ds; |
572e2857 | 1323 | |
13fe0198 MA |
1324 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
1325 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
1326 | dsl_dataset_rele(ds, FTAG); |
1327 | } | |
1328 | ||
34dc7c2f BB |
1329 | return (dsobj); |
1330 | } | |
1331 | ||
34dc7c2f | 1332 | /* |
13fe0198 MA |
1333 | * The unique space in the head dataset can be calculated by subtracting |
1334 | * the space used in the most recent snapshot, that is still being used | |
1335 | * in this file system, from the space currently in use. To figure out | |
1336 | * the space in the most recent snapshot still in use, we need to take | |
1337 | * the total space used in the snapshot and subtract out the space that | |
1338 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 1339 | */ |
13fe0198 MA |
1340 | void |
1341 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 1342 | { |
13fe0198 MA |
1343 | uint64_t mrs_used; |
1344 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 1345 | |
0c66c32d | 1346 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 1347 | |
d683ddbb JG |
1348 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
1349 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
1350 | else |
1351 | mrs_used = 0; | |
45d1cae3 | 1352 | |
13fe0198 | 1353 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 1354 | |
13fe0198 | 1355 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
1356 | dsl_dataset_phys(ds)->ds_unique_bytes = |
1357 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 1358 | |
13fe0198 MA |
1359 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
1360 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 1361 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
1362 | } |
1363 | ||
13fe0198 MA |
1364 | void |
1365 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
1366 | dmu_tx_t *tx) | |
45d1cae3 | 1367 | { |
13fe0198 | 1368 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
13fe0198 | 1369 | ASSERTV(uint64_t count); |
1c27024e | 1370 | int err; |
13fe0198 | 1371 | |
d683ddbb JG |
1372 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
1373 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1374 | obj, tx); | |
13fe0198 MA |
1375 | /* |
1376 | * The err should not be ENOENT, but a bug in a previous version | |
1377 | * of the code could cause upgrade_clones_cb() to not set | |
1378 | * ds_next_snap_obj when it should, leading to a missing entry. | |
1379 | * If we knew that the pool was created after | |
1380 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
1381 | * ENOENT. However, at least we can check that we don't have | |
1382 | * too many entries in the next_clones_obj even after failing to | |
1383 | * remove this one. | |
1384 | */ | |
1385 | if (err != ENOENT) | |
1386 | VERIFY0(err); | |
d683ddbb | 1387 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 1388 | &count)); |
d683ddbb | 1389 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 1390 | } |
45d1cae3 | 1391 | |
45d1cae3 | 1392 | |
13fe0198 MA |
1393 | blkptr_t * |
1394 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1395 | { | |
d683ddbb | 1396 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
1397 | } |
1398 | ||
13fe0198 MA |
1399 | spa_t * |
1400 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1401 | { | |
1402 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
1403 | } |
1404 | ||
13fe0198 MA |
1405 | void |
1406 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 1407 | { |
13fe0198 | 1408 | dsl_pool_t *dp; |
45d1cae3 | 1409 | |
13fe0198 MA |
1410 | if (ds == NULL) /* this is the meta-objset */ |
1411 | return; | |
34dc7c2f | 1412 | |
428870ff | 1413 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1414 | |
d683ddbb | 1415 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1416 | panic("dirtying snapshot!"); |
1417 | ||
0efd9791 AG |
1418 | /* Must not dirty a dataset in the same txg where it got snapshotted. */ |
1419 | ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); | |
34dc7c2f | 1420 | |
0efd9791 | 1421 | dp = ds->ds_dir->dd_pool; |
13fe0198 | 1422 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
52ce99dd TC |
1423 | objset_t *os = ds->ds_objset; |
1424 | ||
34dc7c2f BB |
1425 | /* up the hold count until we can be written out */ |
1426 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
52ce99dd TC |
1427 | |
1428 | /* if this dataset is encrypted, grab a reference to the DCK */ | |
1429 | if (ds->ds_dir->dd_crypto_obj != 0 && | |
1430 | !os->os_raw_receive && | |
1431 | !os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { | |
1432 | ASSERT3P(ds->ds_key_mapping, !=, NULL); | |
1433 | key_mapping_add_ref(ds->ds_key_mapping, ds); | |
1434 | } | |
34dc7c2f BB |
1435 | } |
1436 | } | |
1437 | ||
34dc7c2f | 1438 | static int |
13fe0198 | 1439 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1440 | { |
13fe0198 | 1441 | uint64_t asize; |
34dc7c2f | 1442 | |
13fe0198 | 1443 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1444 | return (0); |
1445 | ||
34dc7c2f | 1446 | /* |
13fe0198 MA |
1447 | * If there's an fs-only reservation, any blocks that might become |
1448 | * owned by the snapshot dataset must be accommodated by space | |
1449 | * outside of the reservation. | |
34dc7c2f | 1450 | */ |
13fe0198 | 1451 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1452 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1453 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1454 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1455 | |
1456 | /* | |
13fe0198 MA |
1457 | * Propagate any reserved space for this snapshot to other |
1458 | * snapshot checks in this sync group. | |
34dc7c2f | 1459 | */ |
13fe0198 MA |
1460 | if (asize > 0) |
1461 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1462 | |
1463 | return (0); | |
1464 | } | |
1465 | ||
34dc7c2f | 1466 | int |
13fe0198 | 1467 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1468 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1469 | { |
13fe0198 MA |
1470 | int error; |
1471 | uint64_t value; | |
34dc7c2f | 1472 | |
13fe0198 | 1473 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1474 | |
13fe0198 | 1475 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1476 | return (0); |
34dc7c2f BB |
1477 | |
1478 | /* | |
13fe0198 MA |
1479 | * We don't allow multiple snapshots of the same txg. If there |
1480 | * is already one, try again. | |
34dc7c2f | 1481 | */ |
d683ddbb | 1482 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1483 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1484 | |
1485 | /* | |
13fe0198 | 1486 | * Check for conflicting snapshot name. |
34dc7c2f | 1487 | */ |
13fe0198 MA |
1488 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1489 | if (error == 0) | |
2e528b49 | 1490 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1491 | if (error != ENOENT) |
1492 | return (error); | |
45d1cae3 | 1493 | |
96c2e961 KW |
1494 | /* |
1495 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1496 | * those into which we are currently receiving. However, if we are | |
1497 | * creating this snapshot as part of a receive, this check will be | |
1498 | * executed atomically with respect to the completion of the receive | |
1499 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1500 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1501 | * dmu_recv_end_sync(). | |
1502 | */ | |
1503 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1504 | return (SET_ERROR(EBUSY)); | |
1505 | ||
788eb90c JJ |
1506 | /* |
1507 | * Skip the check for temporary snapshots or if we have already checked | |
1508 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1509 | * check the count here when we're receiving a stream. | |
1510 | */ | |
1511 | if (cnt != 0 && cr != NULL) { | |
1512 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1513 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1514 | if (error != 0) | |
1515 | return (error); | |
1516 | } | |
1517 | ||
13fe0198 MA |
1518 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1519 | if (error != 0) | |
1520 | return (error); | |
45d1cae3 | 1521 | |
34dc7c2f BB |
1522 | return (0); |
1523 | } | |
1524 | ||
234c91c5 | 1525 | int |
13fe0198 | 1526 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) |
b128c09f | 1527 | { |
13fe0198 MA |
1528 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1529 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1530 | nvpair_t *pair; | |
1531 | int rv = 0; | |
b128c09f | 1532 | |
788eb90c JJ |
1533 | /* |
1534 | * Pre-compute how many total new snapshots will be created for each | |
1535 | * level in the tree and below. This is needed for validating the | |
1536 | * snapshot limit when either taking a recursive snapshot or when | |
1537 | * taking multiple snapshots. | |
1538 | * | |
1539 | * The problem is that the counts are not actually adjusted when | |
1540 | * we are checking, only when we finally sync. For a single snapshot, | |
1541 | * this is easy, the count will increase by 1 at each node up the tree, | |
1542 | * but its more complicated for the recursive/multiple snapshot case. | |
1543 | * | |
1544 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1545 | * at each level up the tree but since it is validating each snapshot | |
1546 | * independently we need to be sure that we are validating the complete | |
1547 | * count for the entire set of snapshots. We do this by rolling up the | |
1548 | * counts for each component of the name into an nvlist and then | |
1549 | * checking each of those cases with the aggregated count. | |
1550 | * | |
1551 | * This approach properly handles not only the recursive snapshot | |
1552 | * case (where we get all of those on the ddsa_snaps list) but also | |
1553 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1554 | * validate the limit on 'a' using a count of 2). | |
1555 | * | |
1556 | * We validate the snapshot names in the third loop and only report | |
1557 | * name errors once. | |
1558 | */ | |
1559 | if (dmu_tx_is_syncing(tx)) { | |
1560 | char *nm; | |
1561 | nvlist_t *cnt_track = NULL; | |
1562 | cnt_track = fnvlist_alloc(); | |
1563 | ||
1564 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1565 | ||
1566 | /* Rollup aggregated counts into the cnt_track list */ | |
1567 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1568 | pair != NULL; | |
1569 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1570 | char *pdelim; | |
1571 | uint64_t val; | |
1572 | ||
1573 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1574 | pdelim = strchr(nm, '@'); | |
1575 | if (pdelim == NULL) | |
1576 | continue; | |
1577 | *pdelim = '\0'; | |
1578 | ||
1579 | do { | |
1580 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1581 | &val) == 0) { | |
1582 | /* update existing entry */ | |
1583 | fnvlist_add_uint64(cnt_track, nm, | |
1584 | val + 1); | |
1585 | } else { | |
1586 | /* add to list */ | |
1587 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1588 | } | |
1589 | ||
1590 | pdelim = strrchr(nm, '/'); | |
1591 | if (pdelim != NULL) | |
1592 | *pdelim = '\0'; | |
1593 | } while (pdelim != NULL); | |
1594 | } | |
1595 | ||
1596 | kmem_free(nm, MAXPATHLEN); | |
1597 | ||
1598 | /* Check aggregated counts at each level */ | |
1599 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1600 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1601 | int error = 0; | |
1602 | char *name; | |
1603 | uint64_t cnt = 0; | |
1604 | dsl_dataset_t *ds; | |
1605 | ||
1606 | name = nvpair_name(pair); | |
1607 | cnt = fnvpair_value_uint64(pair); | |
1608 | ASSERT(cnt > 0); | |
1609 | ||
1610 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1611 | if (error == 0) { | |
1612 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1613 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1614 | ddsa->ddsa_cr); | |
1615 | dsl_dataset_rele(ds, FTAG); | |
1616 | } | |
1617 | ||
1618 | if (error != 0) { | |
1619 | if (ddsa->ddsa_errors != NULL) | |
1620 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1621 | name, error); | |
1622 | rv = error; | |
1623 | /* only report one error for this check */ | |
1624 | break; | |
1625 | } | |
1626 | } | |
1627 | nvlist_free(cnt_track); | |
1628 | } | |
1629 | ||
13fe0198 MA |
1630 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1631 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1632 | int error = 0; | |
1633 | dsl_dataset_t *ds; | |
689f093e | 1634 | char *name, *atp = NULL; |
eca7b760 | 1635 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1636 | |
1637 | name = nvpair_name(pair); | |
eca7b760 | 1638 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 1639 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1640 | if (error == 0) { |
1641 | atp = strchr(name, '@'); | |
1642 | if (atp == NULL) | |
2e528b49 | 1643 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1644 | if (error == 0) |
1645 | (void) strlcpy(dsname, name, atp - name + 1); | |
1646 | } | |
1647 | if (error == 0) | |
1648 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1649 | if (error == 0) { | |
788eb90c | 1650 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1651 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1652 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1653 | dsl_dataset_rele(ds, FTAG); |
1654 | } | |
b128c09f | 1655 | |
13fe0198 MA |
1656 | if (error != 0) { |
1657 | if (ddsa->ddsa_errors != NULL) { | |
1658 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1659 | name, error); | |
1660 | } | |
1661 | rv = error; | |
1662 | } | |
1663 | } | |
788eb90c | 1664 | |
13fe0198 | 1665 | return (rv); |
b128c09f BB |
1666 | } |
1667 | ||
13fe0198 MA |
1668 | void |
1669 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1670 | dmu_tx_t *tx) | |
428870ff | 1671 | { |
13fe0198 MA |
1672 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1673 | dmu_buf_t *dbuf; | |
1674 | dsl_dataset_phys_t *dsphys; | |
1675 | uint64_t dsobj, crtxg; | |
1676 | objset_t *mos = dp->dp_meta_objset; | |
1677 | ASSERTV(static zil_header_t zero_zil); | |
1678 | ASSERTV(objset_t *os); | |
1679 | ||
1680 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1681 | |
428870ff | 1682 | /* |
13fe0198 MA |
1683 | * If we are on an old pool, the zil must not be active, in which |
1684 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1685 | */ |
13fe0198 MA |
1686 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1687 | dmu_objset_from_ds(ds, &os) != 0 || | |
1688 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1689 | sizeof (zero_zil)) == 0); | |
428870ff | 1690 | |
0efd9791 AG |
1691 | /* Should not snapshot a dirty dataset. */ |
1692 | ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1693 | ds, tx->tx_txg)); | |
1694 | ||
788eb90c | 1695 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1696 | |
1697 | /* | |
13fe0198 | 1698 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1699 | */ |
1700 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1701 | crtxg = 1; | |
1702 | else | |
1703 | crtxg = tx->tx_txg; | |
1704 | ||
34dc7c2f BB |
1705 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1706 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1707 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1708 | dmu_buf_will_dirty(dbuf, tx); |
1709 | dsphys = dbuf->db_data; | |
b128c09f | 1710 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1711 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1712 | dsphys->ds_fsid_guid = unique_create(); | |
1713 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1714 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1715 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1716 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1717 | dsphys->ds_next_snap_obj = ds->ds_object; |
1718 | dsphys->ds_num_children = 1; | |
1719 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1720 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1721 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1722 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1723 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1724 | dsphys->ds_uncompressed_bytes = | |
1725 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1726 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
cc9bb3e5 | 1727 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 1728 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; |
cc9bb3e5 | 1729 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
1730 | dmu_buf_rele(dbuf, FTAG); |
1731 | ||
1c27024e | 1732 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
1733 | if (zfeature_active(f, ds->ds_feature[f])) { |
1734 | dsl_dataset_activate_feature(dsobj, f, | |
1735 | ds->ds_feature[f], tx); | |
1736 | } | |
241b5415 | 1737 | } |
f1512ee6 | 1738 | |
d683ddbb JG |
1739 | ASSERT3U(ds->ds_prev != 0, ==, |
1740 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1741 | if (ds->ds_prev) { |
b128c09f | 1742 | uint64_t next_clones_obj = |
d683ddbb JG |
1743 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1744 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1745 | ds->ds_object || |
d683ddbb JG |
1746 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1747 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1748 | ds->ds_object) { | |
34dc7c2f | 1749 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1750 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1751 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1752 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1753 | } else if (next_clones_obj != 0) { |
13fe0198 | 1754 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1755 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1756 | VERIFY0(zap_add_int(mos, |
b128c09f | 1757 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1758 | } |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * If we have a reference-reservation on this dataset, we will | |
1763 | * need to increase the amount of refreservation being charged | |
1764 | * since our unique space is going to zero. | |
1765 | */ | |
1766 | if (ds->ds_reserved) { | |
428870ff BB |
1767 | int64_t delta; |
1768 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1769 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1770 | ds->ds_reserved); | |
b128c09f | 1771 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1772 | delta, 0, 0, tx); |
34dc7c2f BB |
1773 | } |
1774 | ||
34dc7c2f | 1775 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1776 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1777 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1778 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1779 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1780 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1781 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1782 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1783 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
30af21b0 | 1784 | dsl_bookmark_snapshotted(ds, tx); |
428870ff | 1785 | |
a1d477c2 MA |
1786 | if (dsl_dataset_remap_deadlist_exists(ds)) { |
1787 | uint64_t remap_deadlist_obj = | |
1788 | dsl_dataset_get_remap_deadlist_object(ds); | |
1789 | /* | |
1790 | * Move the remap_deadlist to the snapshot. The head | |
1791 | * will create a new remap deadlist on demand, from | |
1792 | * dsl_dataset_block_remapped(). | |
1793 | */ | |
1794 | dsl_dataset_unset_remap_deadlist_object(ds, tx); | |
1795 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
1796 | ||
1797 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1798 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_REMAP_DEADLIST, | |
1799 | sizeof (remap_deadlist_obj), 1, &remap_deadlist_obj, tx)); | |
1800 | } | |
1801 | ||
f00ab3f2 TC |
1802 | /* |
1803 | * Create a ivset guid for this snapshot if the dataset is | |
1804 | * encrypted. This may be overridden by a raw receive. A | |
1805 | * previous implementation of this code did not have this | |
1806 | * field as part of the on-disk format for ZFS encryption | |
1807 | * (see errata #4). As part of the remediation for this | |
1808 | * issue, we ask the user to enable the bookmark_v2 feature | |
1809 | * which is now a dependency of the encryption feature. We | |
1810 | * use this as a heuristic to determine when the user has | |
1811 | * elected to correct any datasets created with the old code. | |
1812 | * As a result, we only do this step if the bookmark_v2 | |
1813 | * feature is enabled, which limits the number of states a | |
1814 | * given pool / dataset can be in with regards to terms of | |
1815 | * correcting the issue. | |
1816 | */ | |
1817 | if (ds->ds_dir->dd_crypto_obj != 0 && | |
1818 | spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARK_V2)) { | |
1819 | uint64_t ivset_guid = unique_create(); | |
1820 | ||
1821 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1822 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_IVSET_GUID, | |
1823 | sizeof (ivset_guid), 1, &ivset_guid, tx)); | |
1824 | } | |
1825 | ||
d683ddbb JG |
1826 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1827 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1828 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1829 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
a1d477c2 | 1830 | |
34dc7c2f | 1831 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1832 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1833 | |
d683ddbb | 1834 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1835 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1836 | |
1837 | if (ds->ds_prev) | |
13fe0198 MA |
1838 | dsl_dataset_rele(ds->ds_prev, ds); |
1839 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1840 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1841 | |
428870ff BB |
1842 | dsl_scan_ds_snapshotted(ds, tx); |
1843 | ||
1844 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1845 | |
74756182 | 1846 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, " "); |
34dc7c2f BB |
1847 | } |
1848 | ||
234c91c5 | 1849 | void |
13fe0198 | 1850 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1851 | { |
13fe0198 MA |
1852 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1853 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1854 | nvpair_t *pair; | |
34dc7c2f | 1855 | |
13fe0198 MA |
1856 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1857 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1858 | dsl_dataset_t *ds; | |
1859 | char *name, *atp; | |
eca7b760 | 1860 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1861 | |
1862 | name = nvpair_name(pair); | |
1863 | atp = strchr(name, '@'); | |
1864 | (void) strlcpy(dsname, name, atp - name + 1); | |
1865 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1866 | ||
1867 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1868 | if (ddsa->ddsa_props != NULL) { | |
1869 | dsl_props_set_sync_impl(ds->ds_prev, | |
1870 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1871 | } | |
a0bd735a | 1872 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
1873 | dsl_dataset_rele(ds, FTAG); |
1874 | } | |
34dc7c2f BB |
1875 | } |
1876 | ||
13fe0198 MA |
1877 | /* |
1878 | * The snapshots must all be in the same pool. | |
1879 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1880 | */ | |
1881 | int | |
1882 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1883 | { |
13fe0198 MA |
1884 | dsl_dataset_snapshot_arg_t ddsa; |
1885 | nvpair_t *pair; | |
1886 | boolean_t needsuspend; | |
1887 | int error; | |
1888 | spa_t *spa; | |
1889 | char *firstname; | |
1890 | nvlist_t *suspended = NULL; | |
330d06f9 | 1891 | |
13fe0198 MA |
1892 | pair = nvlist_next_nvpair(snaps, NULL); |
1893 | if (pair == NULL) | |
1894 | return (0); | |
1895 | firstname = nvpair_name(pair); | |
1896 | ||
1897 | error = spa_open(firstname, &spa, FTAG); | |
1898 | if (error != 0) | |
1899 | return (error); | |
1900 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1901 | spa_close(spa, FTAG); | |
1902 | ||
1903 | if (needsuspend) { | |
1904 | suspended = fnvlist_alloc(); | |
1905 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1906 | pair = nvlist_next_nvpair(snaps, pair)) { | |
eca7b760 | 1907 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1908 | char *snapname = nvpair_name(pair); |
1909 | char *atp; | |
1910 | void *cookie; | |
1911 | ||
1912 | atp = strchr(snapname, '@'); | |
1913 | if (atp == NULL) { | |
2e528b49 | 1914 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1915 | break; |
1916 | } | |
1917 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1918 | ||
1919 | error = zil_suspend(fsname, &cookie); | |
1920 | if (error != 0) | |
1921 | break; | |
1922 | fnvlist_add_uint64(suspended, fsname, | |
1923 | (uintptr_t)cookie); | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | ddsa.ddsa_snaps = snaps; | |
1928 | ddsa.ddsa_props = props; | |
1929 | ddsa.ddsa_errors = errors; | |
788eb90c | 1930 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1931 | |
1932 | if (error == 0) { | |
1933 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1934 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1935 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1936 | } |
1937 | ||
1938 | if (suspended != NULL) { | |
1939 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1940 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1941 | zil_resume((void *)(uintptr_t) | |
1942 | fnvpair_value_uint64(pair)); | |
1943 | } | |
1944 | fnvlist_free(suspended); | |
1945 | } | |
1946 | ||
1947 | return (error); | |
1948 | } | |
1949 | ||
1950 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1951 | const char *ddsta_fsname; | |
1952 | const char *ddsta_snapname; | |
1953 | minor_t ddsta_cleanup_minor; | |
1954 | const char *ddsta_htag; | |
1955 | } dsl_dataset_snapshot_tmp_arg_t; | |
1956 | ||
1957 | static int | |
1958 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1959 | { | |
1960 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1961 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1962 | dsl_dataset_t *ds; | |
1963 | int error; | |
1964 | ||
1965 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1966 | if (error != 0) | |
1967 | return (error); | |
1968 | ||
788eb90c | 1969 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1970 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1971 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1972 | if (error != 0) { |
1973 | dsl_dataset_rele(ds, FTAG); | |
1974 | return (error); | |
1975 | } | |
1976 | ||
1977 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1978 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1979 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1980 | } |
1981 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1982 | B_TRUE, tx); | |
1983 | if (error != 0) { | |
1984 | dsl_dataset_rele(ds, FTAG); | |
1985 | return (error); | |
1986 | } | |
1987 | ||
1988 | dsl_dataset_rele(ds, FTAG); | |
1989 | return (0); | |
1990 | } | |
1991 | ||
1992 | static void | |
1993 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1994 | { | |
1995 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1996 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 1997 | dsl_dataset_t *ds = NULL; |
13fe0198 MA |
1998 | |
1999 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
2000 | ||
2001 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
2002 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
2003 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
2004 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
2005 | ||
2006 | dsl_dataset_rele(ds, FTAG); | |
2007 | } | |
2008 | ||
2009 | int | |
2010 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
2011 | minor_t cleanup_minor, const char *htag) | |
2012 | { | |
2013 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
2014 | int error; | |
2015 | spa_t *spa; | |
2016 | boolean_t needsuspend; | |
2017 | void *cookie; | |
2018 | ||
2019 | ddsta.ddsta_fsname = fsname; | |
2020 | ddsta.ddsta_snapname = snapname; | |
2021 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
2022 | ddsta.ddsta_htag = htag; | |
2023 | ||
2024 | error = spa_open(fsname, &spa, FTAG); | |
2025 | if (error != 0) | |
2026 | return (error); | |
2027 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
2028 | spa_close(spa, FTAG); | |
2029 | ||
2030 | if (needsuspend) { | |
2031 | error = zil_suspend(fsname, &cookie); | |
2032 | if (error != 0) | |
2033 | return (error); | |
2034 | } | |
2035 | ||
2036 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 2037 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
2038 | |
2039 | if (needsuspend) | |
2040 | zil_resume(cookie); | |
2041 | return (error); | |
2042 | } | |
2043 | ||
13fe0198 MA |
2044 | void |
2045 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
2046 | { | |
2047 | ASSERT(dmu_tx_is_syncing(tx)); | |
2048 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 2049 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
2050 | |
2051 | /* | |
2052 | * in case we had to change ds_fsid_guid when we opened it, | |
2053 | * sync it out now. | |
2054 | */ | |
2055 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 2056 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 | 2057 | |
47dfff3b MA |
2058 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
2059 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
2060 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
2061 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
2062 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
2063 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
2064 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
2065 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
2066 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
2067 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
2068 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
2069 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
2070 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
2071 | } | |
2072 | ||
13fe0198 | 2073 | dmu_objset_sync(ds->ds_objset, zio, tx); |
f1512ee6 | 2074 | |
1c27024e | 2075 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
2076 | if (zfeature_active(f, ds->ds_feature_activation[f])) { |
2077 | if (zfeature_active(f, ds->ds_feature[f])) | |
241b5415 | 2078 | continue; |
d52d80b7 PD |
2079 | dsl_dataset_activate_feature(ds->ds_object, f, |
2080 | ds->ds_feature_activation[f], tx); | |
2081 | ds->ds_feature[f] = ds->ds_feature_activation[f]; | |
241b5415 | 2082 | } |
f1512ee6 | 2083 | } |
13fe0198 MA |
2084 | } |
2085 | ||
37f03da8 SH |
2086 | /* |
2087 | * Check if the percentage of blocks shared between the clone and the | |
2088 | * snapshot (as opposed to those that are clone only) is below a certain | |
2089 | * threshold | |
2090 | */ | |
d2a32912 | 2091 | static boolean_t |
37f03da8 SH |
2092 | dsl_livelist_should_disable(dsl_dataset_t *ds) |
2093 | { | |
2094 | uint64_t used, referenced; | |
2095 | int percent_shared; | |
2096 | ||
2097 | used = dsl_dir_get_usedds(ds->ds_dir); | |
2098 | referenced = dsl_get_referenced(ds); | |
2099 | ASSERT3U(referenced, >=, 0); | |
2100 | ASSERT3U(used, >=, 0); | |
2101 | if (referenced == 0) | |
2102 | return (B_FALSE); | |
2103 | percent_shared = (100 * (referenced - used)) / referenced; | |
2104 | if (percent_shared <= zfs_livelist_min_percent_shared) | |
2105 | return (B_TRUE); | |
2106 | return (B_FALSE); | |
2107 | } | |
2108 | ||
2109 | /* | |
2110 | * Check if it is possible to combine two livelist entries into one. | |
2111 | * This is the case if the combined number of 'live' blkptrs (ALLOCs that | |
2112 | * don't have a matching FREE) is under the maximum sublist size. | |
2113 | * We check this by subtracting twice the total number of frees from the total | |
2114 | * number of blkptrs. FREEs are counted twice because each FREE blkptr | |
2115 | * will cancel out an ALLOC blkptr when the livelist is processed. | |
2116 | */ | |
2117 | static boolean_t | |
2118 | dsl_livelist_should_condense(dsl_deadlist_entry_t *first, | |
2119 | dsl_deadlist_entry_t *next) | |
2120 | { | |
2121 | uint64_t total_free = first->dle_bpobj.bpo_phys->bpo_num_freed + | |
2122 | next->dle_bpobj.bpo_phys->bpo_num_freed; | |
2123 | uint64_t total_entries = first->dle_bpobj.bpo_phys->bpo_num_blkptrs + | |
2124 | next->dle_bpobj.bpo_phys->bpo_num_blkptrs; | |
2125 | if ((total_entries - (2 * total_free)) < zfs_livelist_max_entries) | |
2126 | return (B_TRUE); | |
2127 | return (B_FALSE); | |
2128 | } | |
2129 | ||
2130 | typedef struct try_condense_arg { | |
2131 | spa_t *spa; | |
2132 | dsl_dataset_t *ds; | |
2133 | } try_condense_arg_t; | |
2134 | ||
2135 | /* | |
2136 | * Iterate over the livelist entries, searching for a pair to condense. | |
2137 | * A nonzero return value means stop, 0 means keep looking. | |
2138 | */ | |
0efd9791 | 2139 | static int |
37f03da8 | 2140 | dsl_livelist_try_condense(void *arg, dsl_deadlist_entry_t *first) |
0efd9791 | 2141 | { |
37f03da8 SH |
2142 | try_condense_arg_t *tca = arg; |
2143 | spa_t *spa = tca->spa; | |
2144 | dsl_dataset_t *ds = tca->ds; | |
2145 | dsl_deadlist_t *ll = &ds->ds_dir->dd_livelist; | |
2146 | dsl_deadlist_entry_t *next; | |
2147 | ||
2148 | /* The condense thread has not yet been created at import */ | |
2149 | if (spa->spa_livelist_condense_zthr == NULL) | |
2150 | return (1); | |
2151 | ||
2152 | /* A condense is already in progress */ | |
2153 | if (spa->spa_to_condense.ds != NULL) | |
2154 | return (1); | |
2155 | ||
2156 | next = AVL_NEXT(&ll->dl_tree, &first->dle_node); | |
2157 | /* The livelist has only one entry - don't condense it */ | |
2158 | if (next == NULL) | |
2159 | return (1); | |
2160 | ||
2161 | /* Next is the newest entry - don't condense it */ | |
2162 | if (AVL_NEXT(&ll->dl_tree, &next->dle_node) == NULL) | |
2163 | return (1); | |
2164 | ||
2165 | /* This pair is not ready to condense but keep looking */ | |
2166 | if (!dsl_livelist_should_condense(first, next)) | |
2167 | return (0); | |
2168 | ||
2169 | /* | |
2170 | * Add a ref to prevent the dataset from being evicted while | |
2171 | * the condense zthr or synctask are running. Ref will be | |
2172 | * released at the end of the condense synctask | |
2173 | */ | |
2174 | dmu_buf_add_ref(ds->ds_dbuf, spa); | |
2175 | ||
2176 | spa->spa_to_condense.ds = ds; | |
2177 | spa->spa_to_condense.first = first; | |
2178 | spa->spa_to_condense.next = next; | |
2179 | spa->spa_to_condense.syncing = B_FALSE; | |
2180 | spa->spa_to_condense.cancelled = B_FALSE; | |
2181 | ||
2182 | zthr_wakeup(spa->spa_livelist_condense_zthr); | |
2183 | return (1); | |
2184 | } | |
2185 | ||
2186 | static void | |
2187 | dsl_flush_pending_livelist(dsl_dataset_t *ds, dmu_tx_t *tx) | |
2188 | { | |
2189 | dsl_dir_t *dd = ds->ds_dir; | |
2190 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
2191 | dsl_deadlist_entry_t *last = dsl_deadlist_last(&dd->dd_livelist); | |
2192 | ||
2193 | /* Check if we need to add a new sub-livelist */ | |
2194 | if (last == NULL) { | |
2195 | /* The livelist is empty */ | |
2196 | dsl_deadlist_add_key(&dd->dd_livelist, | |
2197 | tx->tx_txg - 1, tx); | |
2198 | } else if (spa_sync_pass(spa) == 1) { | |
2199 | /* | |
2200 | * Check if the newest entry is full. If it is, make a new one. | |
2201 | * We only do this once per sync because we could overfill a | |
2202 | * sublist in one sync pass and don't want to add another entry | |
2203 | * for a txg that is already represented. This ensures that | |
2204 | * blkptrs born in the same txg are stored in the same sublist. | |
2205 | */ | |
2206 | bpobj_t bpobj = last->dle_bpobj; | |
2207 | uint64_t all = bpobj.bpo_phys->bpo_num_blkptrs; | |
2208 | uint64_t free = bpobj.bpo_phys->bpo_num_freed; | |
2209 | uint64_t alloc = all - free; | |
2210 | if (alloc > zfs_livelist_max_entries) { | |
2211 | dsl_deadlist_add_key(&dd->dd_livelist, | |
2212 | tx->tx_txg - 1, tx); | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | /* Insert each entry into the on-disk livelist */ | |
2217 | bplist_iterate(&dd->dd_pending_allocs, | |
2218 | dsl_deadlist_insert_alloc_cb, &dd->dd_livelist, tx); | |
2219 | bplist_iterate(&dd->dd_pending_frees, | |
2220 | dsl_deadlist_insert_free_cb, &dd->dd_livelist, tx); | |
2221 | ||
2222 | /* Attempt to condense every pair of adjacent entries */ | |
2223 | try_condense_arg_t arg = { | |
2224 | .spa = spa, | |
2225 | .ds = ds | |
2226 | }; | |
2227 | dsl_deadlist_iterate(&dd->dd_livelist, dsl_livelist_try_condense, | |
2228 | &arg); | |
0efd9791 AG |
2229 | } |
2230 | ||
2231 | void | |
2232 | dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx) | |
2233 | { | |
64fc7762 | 2234 | objset_t *os = ds->ds_objset; |
0efd9791 AG |
2235 | |
2236 | bplist_iterate(&ds->ds_pending_deadlist, | |
37f03da8 SH |
2237 | dsl_deadlist_insert_alloc_cb, &ds->ds_deadlist, tx); |
2238 | ||
2239 | if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist)) { | |
2240 | dsl_flush_pending_livelist(ds, tx); | |
2241 | if (dsl_livelist_should_disable(ds)) { | |
2242 | dsl_dir_remove_livelist(ds->ds_dir, tx, B_TRUE); | |
2243 | } | |
2244 | } | |
0efd9791 | 2245 | |
30af21b0 PD |
2246 | dsl_bookmark_sync_done(ds, tx); |
2247 | ||
64fc7762 MA |
2248 | if (os->os_synced_dnodes != NULL) { |
2249 | multilist_destroy(os->os_synced_dnodes); | |
2250 | os->os_synced_dnodes = NULL; | |
2251 | } | |
2252 | ||
52ce99dd TC |
2253 | if (os->os_encrypted) |
2254 | os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_FALSE; | |
2255 | else | |
2256 | ASSERT0(os->os_next_write_raw[tx->tx_txg & TXG_MASK]); | |
2257 | ||
0efd9791 AG |
2258 | ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx))); |
2259 | ||
2260 | dmu_buf_rele(ds->ds_dbuf, ds); | |
2261 | } | |
2262 | ||
d99a0153 CW |
2263 | int |
2264 | get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val) | |
13fe0198 MA |
2265 | { |
2266 | uint64_t count = 0; | |
2267 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
2268 | zap_cursor_t zc; | |
2269 | zap_attribute_t za; | |
13fe0198 MA |
2270 | |
2271 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
2272 | |
2273 | /* | |
13fe0198 | 2274 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
2275 | * due to a bug in a previous version of the code. |
2276 | * Only trust it if it has the right number of entries. | |
2277 | */ | |
d683ddbb JG |
2278 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
2279 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
2280 | &count)); |
2281 | } | |
d99a0153 CW |
2282 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) { |
2283 | return (ENOENT); | |
2284 | } | |
d683ddbb JG |
2285 | for (zap_cursor_init(&zc, mos, |
2286 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
2287 | zap_cursor_retrieve(&zc, &za) == 0; |
2288 | zap_cursor_advance(&zc)) { | |
2289 | dsl_dataset_t *clone; | |
eca7b760 | 2290 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
2291 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
2292 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 2293 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 2294 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
2295 | dsl_dataset_rele(clone, FTAG); |
2296 | } | |
2297 | zap_cursor_fini(&zc); | |
d99a0153 CW |
2298 | return (0); |
2299 | } | |
2300 | ||
2301 | void | |
2302 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
2303 | { | |
2304 | nvlist_t *propval = fnvlist_alloc(); | |
2305 | nvlist_t *val; | |
2306 | ||
2307 | /* | |
2308 | * We use nvlist_alloc() instead of fnvlist_alloc() because the | |
2309 | * latter would allocate the list with NV_UNIQUE_NAME flag. | |
2310 | * As a result, every time a clone name is appended to the list | |
e1cfd73f | 2311 | * it would be (linearly) searched for a duplicate name. |
d99a0153 CW |
2312 | * We already know that all clone names must be unique and we |
2313 | * want avoid the quadratic complexity of double-checking that | |
2314 | * because we can have a large number of clones. | |
2315 | */ | |
2316 | VERIFY0(nvlist_alloc(&val, 0, KM_SLEEP)); | |
2317 | ||
2318 | if (get_clones_stat_impl(ds, val) == 0) { | |
2319 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); | |
2320 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), | |
2321 | propval); | |
2322 | } | |
2323 | ||
330d06f9 MA |
2324 | nvlist_free(val); |
2325 | nvlist_free(propval); | |
330d06f9 MA |
2326 | } |
2327 | ||
d99a0153 CW |
2328 | /* |
2329 | * Returns a string that represents the receive resume stats token. It should | |
2330 | * be freed with strfree(). | |
2331 | */ | |
2332 | char * | |
2333 | get_receive_resume_stats_impl(dsl_dataset_t *ds) | |
47dfff3b MA |
2334 | { |
2335 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2336 | ||
2337 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
2338 | char *str; | |
2339 | void *packed; | |
2340 | uint8_t *compressed; | |
2341 | uint64_t val; | |
2342 | nvlist_t *token_nv = fnvlist_alloc(); | |
2343 | size_t packed_size, compressed_size; | |
47dfff3b MA |
2344 | |
2345 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2346 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
2347 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
2348 | } | |
2349 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2350 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
2351 | fnvlist_add_uint64(token_nv, "object", val); | |
2352 | } | |
2353 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2354 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
2355 | fnvlist_add_uint64(token_nv, "offset", val); | |
2356 | } | |
2357 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2358 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
2359 | fnvlist_add_uint64(token_nv, "bytes", val); | |
2360 | } | |
2361 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2362 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
2363 | fnvlist_add_uint64(token_nv, "toguid", val); | |
2364 | } | |
1c27024e | 2365 | char buf[MAXNAMELEN]; |
47dfff3b MA |
2366 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, |
2367 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
2368 | fnvlist_add_string(token_nv, "toname", buf); | |
2369 | } | |
2aa34383 DK |
2370 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2371 | DS_FIELD_RESUME_LARGEBLOCK) == 0) { | |
2372 | fnvlist_add_boolean(token_nv, "largeblockok"); | |
2373 | } | |
47dfff3b MA |
2374 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2375 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
2376 | fnvlist_add_boolean(token_nv, "embedok"); | |
2377 | } | |
2aa34383 DK |
2378 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2379 | DS_FIELD_RESUME_COMPRESSOK) == 0) { | |
2380 | fnvlist_add_boolean(token_nv, "compressok"); | |
2381 | } | |
b5256303 TC |
2382 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2383 | DS_FIELD_RESUME_RAWOK) == 0) { | |
2384 | fnvlist_add_boolean(token_nv, "rawok"); | |
2385 | } | |
30af21b0 PD |
2386 | if (dsl_dataset_feature_is_active(ds, |
2387 | SPA_FEATURE_REDACTED_DATASETS)) { | |
2388 | uint64_t num_redact_snaps; | |
2389 | uint64_t *redact_snaps; | |
2390 | VERIFY(dsl_dataset_get_uint64_array_feature(ds, | |
2391 | SPA_FEATURE_REDACTED_DATASETS, &num_redact_snaps, | |
2392 | &redact_snaps)); | |
2393 | fnvlist_add_uint64_array(token_nv, "redact_snaps", | |
2394 | redact_snaps, num_redact_snaps); | |
2395 | } | |
2396 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, | |
2397 | DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS) == 0) { | |
2398 | uint64_t num_redact_snaps, int_size; | |
2399 | uint64_t *redact_snaps; | |
2400 | VERIFY0(zap_length(dp->dp_meta_objset, ds->ds_object, | |
2401 | DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, &int_size, | |
2402 | &num_redact_snaps)); | |
2403 | ASSERT3U(int_size, ==, sizeof (uint64_t)); | |
2404 | ||
2405 | redact_snaps = kmem_alloc(int_size * num_redact_snaps, | |
2406 | KM_SLEEP); | |
2407 | VERIFY0(zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2408 | DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, int_size, | |
2409 | num_redact_snaps, redact_snaps)); | |
2410 | fnvlist_add_uint64_array(token_nv, "book_redact_snaps", | |
2411 | redact_snaps, num_redact_snaps); | |
2412 | kmem_free(redact_snaps, int_size * num_redact_snaps); | |
2413 | } | |
47dfff3b MA |
2414 | packed = fnvlist_pack(token_nv, &packed_size); |
2415 | fnvlist_free(token_nv); | |
2416 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
2417 | ||
2418 | compressed_size = gzip_compress(packed, compressed, | |
2419 | packed_size, packed_size, 6); | |
2420 | ||
1c27024e | 2421 | zio_cksum_t cksum; |
fc897b24 | 2422 | fletcher_4_native_varsize(compressed, compressed_size, &cksum); |
47dfff3b MA |
2423 | |
2424 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1c27024e | 2425 | for (int i = 0; i < compressed_size; i++) { |
47dfff3b MA |
2426 | (void) sprintf(str + i * 2, "%02x", compressed[i]); |
2427 | } | |
2428 | str[compressed_size * 2] = '\0'; | |
1c27024e | 2429 | char *propval = kmem_asprintf("%u-%llx-%llx-%s", |
47dfff3b MA |
2430 | ZFS_SEND_RESUME_TOKEN_VERSION, |
2431 | (longlong_t)cksum.zc_word[0], | |
2432 | (longlong_t)packed_size, str); | |
47dfff3b MA |
2433 | kmem_free(packed, packed_size); |
2434 | kmem_free(str, compressed_size * 2 + 1); | |
2435 | kmem_free(compressed, packed_size); | |
d99a0153 CW |
2436 | return (propval); |
2437 | } | |
e4f5fa12 | 2438 | return (kmem_strdup("")); |
d99a0153 CW |
2439 | } |
2440 | ||
2441 | /* | |
2442 | * Returns a string that represents the receive resume stats token of the | |
2443 | * dataset's child. It should be freed with strfree(). | |
2444 | */ | |
2445 | char * | |
2446 | get_child_receive_stats(dsl_dataset_t *ds) | |
2447 | { | |
2448 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
2449 | dsl_dataset_t *recv_ds; | |
2450 | dsl_dataset_name(ds, recvname); | |
2451 | if (strlcat(recvname, "/", sizeof (recvname)) < | |
2452 | sizeof (recvname) && | |
2453 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
2454 | sizeof (recvname) && | |
2455 | dsl_dataset_hold(ds->ds_dir->dd_pool, recvname, FTAG, | |
2456 | &recv_ds) == 0) { | |
2457 | char *propval = get_receive_resume_stats_impl(recv_ds); | |
2458 | dsl_dataset_rele(recv_ds, FTAG); | |
2459 | return (propval); | |
47dfff3b | 2460 | } |
e4f5fa12 | 2461 | return (kmem_strdup("")); |
d99a0153 CW |
2462 | } |
2463 | ||
2464 | static void | |
2465 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
2466 | { | |
2467 | char *propval = get_receive_resume_stats_impl(ds); | |
2468 | if (strcmp(propval, "") != 0) { | |
2469 | dsl_prop_nvlist_add_string(nv, | |
2470 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
2471 | } else { | |
2472 | char *childval = get_child_receive_stats(ds); | |
2473 | if (strcmp(childval, "") != 0) { | |
2474 | dsl_prop_nvlist_add_string(nv, | |
2475 | ZFS_PROP_RECEIVE_RESUME_TOKEN, childval); | |
2476 | } | |
e4f5fa12 | 2477 | kmem_strfree(childval); |
d99a0153 | 2478 | } |
e4f5fa12 | 2479 | kmem_strfree(propval); |
d99a0153 CW |
2480 | } |
2481 | ||
2482 | uint64_t | |
2483 | dsl_get_refratio(dsl_dataset_t *ds) | |
2484 | { | |
2485 | uint64_t ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : | |
2486 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
2487 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
2488 | return (ratio); | |
2489 | } | |
2490 | ||
2491 | uint64_t | |
2492 | dsl_get_logicalreferenced(dsl_dataset_t *ds) | |
2493 | { | |
2494 | return (dsl_dataset_phys(ds)->ds_uncompressed_bytes); | |
2495 | } | |
2496 | ||
2497 | uint64_t | |
2498 | dsl_get_compressratio(dsl_dataset_t *ds) | |
2499 | { | |
2500 | if (ds->ds_is_snapshot) { | |
2501 | return (dsl_get_refratio(ds)); | |
2502 | } else { | |
2503 | dsl_dir_t *dd = ds->ds_dir; | |
2504 | mutex_enter(&dd->dd_lock); | |
2505 | uint64_t val = dsl_dir_get_compressratio(dd); | |
2506 | mutex_exit(&dd->dd_lock); | |
2507 | return (val); | |
2508 | } | |
2509 | } | |
2510 | ||
2511 | uint64_t | |
2512 | dsl_get_used(dsl_dataset_t *ds) | |
2513 | { | |
2514 | if (ds->ds_is_snapshot) { | |
2515 | return (dsl_dataset_phys(ds)->ds_unique_bytes); | |
2516 | } else { | |
2517 | dsl_dir_t *dd = ds->ds_dir; | |
2518 | mutex_enter(&dd->dd_lock); | |
2519 | uint64_t val = dsl_dir_get_used(dd); | |
2520 | mutex_exit(&dd->dd_lock); | |
2521 | return (val); | |
2522 | } | |
2523 | } | |
2524 | ||
2525 | uint64_t | |
2526 | dsl_get_creation(dsl_dataset_t *ds) | |
2527 | { | |
2528 | return (dsl_dataset_phys(ds)->ds_creation_time); | |
2529 | } | |
2530 | ||
2531 | uint64_t | |
2532 | dsl_get_creationtxg(dsl_dataset_t *ds) | |
2533 | { | |
2534 | return (dsl_dataset_phys(ds)->ds_creation_txg); | |
2535 | } | |
2536 | ||
2537 | uint64_t | |
2538 | dsl_get_refquota(dsl_dataset_t *ds) | |
2539 | { | |
2540 | return (ds->ds_quota); | |
2541 | } | |
2542 | ||
2543 | uint64_t | |
2544 | dsl_get_refreservation(dsl_dataset_t *ds) | |
2545 | { | |
2546 | return (ds->ds_reserved); | |
2547 | } | |
2548 | ||
2549 | uint64_t | |
2550 | dsl_get_guid(dsl_dataset_t *ds) | |
2551 | { | |
2552 | return (dsl_dataset_phys(ds)->ds_guid); | |
2553 | } | |
2554 | ||
2555 | uint64_t | |
2556 | dsl_get_unique(dsl_dataset_t *ds) | |
2557 | { | |
2558 | return (dsl_dataset_phys(ds)->ds_unique_bytes); | |
2559 | } | |
2560 | ||
2561 | uint64_t | |
2562 | dsl_get_objsetid(dsl_dataset_t *ds) | |
2563 | { | |
2564 | return (ds->ds_object); | |
2565 | } | |
2566 | ||
2567 | uint64_t | |
2568 | dsl_get_userrefs(dsl_dataset_t *ds) | |
2569 | { | |
2570 | return (ds->ds_userrefs); | |
2571 | } | |
2572 | ||
2573 | uint64_t | |
2574 | dsl_get_defer_destroy(dsl_dataset_t *ds) | |
2575 | { | |
2576 | return (DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
2577 | } | |
2578 | ||
2579 | uint64_t | |
2580 | dsl_get_referenced(dsl_dataset_t *ds) | |
2581 | { | |
2582 | return (dsl_dataset_phys(ds)->ds_referenced_bytes); | |
2583 | } | |
2584 | ||
2585 | uint64_t | |
2586 | dsl_get_numclones(dsl_dataset_t *ds) | |
2587 | { | |
2588 | ASSERT(ds->ds_is_snapshot); | |
2589 | return (dsl_dataset_phys(ds)->ds_num_children - 1); | |
2590 | } | |
2591 | ||
2592 | uint64_t | |
2593 | dsl_get_inconsistent(dsl_dataset_t *ds) | |
2594 | { | |
2595 | return ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) ? | |
2596 | 1 : 0); | |
2597 | } | |
2598 | ||
30af21b0 PD |
2599 | uint64_t |
2600 | dsl_get_redacted(dsl_dataset_t *ds) | |
2601 | { | |
2602 | return (dsl_dataset_feature_is_active(ds, | |
2603 | SPA_FEATURE_REDACTED_DATASETS)); | |
2604 | } | |
2605 | ||
d99a0153 CW |
2606 | uint64_t |
2607 | dsl_get_available(dsl_dataset_t *ds) | |
2608 | { | |
2609 | uint64_t refdbytes = dsl_get_referenced(ds); | |
2610 | uint64_t availbytes = dsl_dir_space_available(ds->ds_dir, | |
2611 | NULL, 0, TRUE); | |
2612 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { | |
2613 | availbytes += | |
2614 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
2615 | } | |
2616 | if (ds->ds_quota != 0) { | |
2617 | /* | |
2618 | * Adjust available bytes according to refquota | |
2619 | */ | |
2620 | if (refdbytes < ds->ds_quota) { | |
2621 | availbytes = MIN(availbytes, | |
2622 | ds->ds_quota - refdbytes); | |
2623 | } else { | |
2624 | availbytes = 0; | |
2625 | } | |
2626 | } | |
2627 | return (availbytes); | |
2628 | } | |
2629 | ||
2630 | int | |
2631 | dsl_get_written(dsl_dataset_t *ds, uint64_t *written) | |
2632 | { | |
2633 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2634 | dsl_dataset_t *prev; | |
2635 | int err = dsl_dataset_hold_obj(dp, | |
2636 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); | |
2637 | if (err == 0) { | |
2638 | uint64_t comp, uncomp; | |
2639 | err = dsl_dataset_space_written(prev, ds, written, | |
2640 | &comp, &uncomp); | |
2641 | dsl_dataset_rele(prev, FTAG); | |
2642 | } | |
2643 | return (err); | |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | * 'snap' should be a buffer of size ZFS_MAX_DATASET_NAME_LEN. | |
2648 | */ | |
2649 | int | |
2650 | dsl_get_prev_snap(dsl_dataset_t *ds, char *snap) | |
2651 | { | |
2652 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2653 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { | |
2654 | dsl_dataset_name(ds->ds_prev, snap); | |
2655 | return (0); | |
2656 | } else { | |
2657 | return (ENOENT); | |
2658 | } | |
2659 | } | |
2660 | ||
30af21b0 PD |
2661 | void |
2662 | dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval) | |
2663 | { | |
2664 | uint64_t nsnaps; | |
2665 | uint64_t *snaps; | |
2666 | if (dsl_dataset_get_uint64_array_feature(ds, | |
2667 | SPA_FEATURE_REDACTED_DATASETS, &nsnaps, &snaps)) { | |
2668 | fnvlist_add_uint64_array(propval, ZPROP_VALUE, snaps, | |
2669 | nsnaps); | |
2670 | } | |
2671 | } | |
2672 | ||
d99a0153 CW |
2673 | /* |
2674 | * Returns the mountpoint property and source for the given dataset in the value | |
2675 | * and source buffers. The value buffer must be at least as large as MAXPATHLEN | |
2676 | * and the source buffer as least as large a ZFS_MAX_DATASET_NAME_LEN. | |
2677 | * Returns 0 on success and an error on failure. | |
2678 | */ | |
2679 | int | |
2680 | dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value, | |
2681 | char *source) | |
2682 | { | |
2683 | int error; | |
2684 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2685 | ||
e1cfd73f | 2686 | /* Retrieve the mountpoint value stored in the zap object */ |
d99a0153 CW |
2687 | error = dsl_prop_get_ds(ds, zfs_prop_to_name(ZFS_PROP_MOUNTPOINT), 1, |
2688 | ZAP_MAXVALUELEN, value, source); | |
2689 | if (error != 0) { | |
2690 | return (error); | |
2691 | } | |
2692 | ||
2693 | /* | |
2694 | * Process the dsname and source to find the full mountpoint string. | |
2695 | * Can be skipped for 'legacy' or 'none'. | |
2696 | */ | |
2697 | if (value[0] == '/') { | |
2698 | char *buf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP); | |
2699 | char *root = buf; | |
2700 | const char *relpath; | |
2701 | ||
2702 | /* | |
2703 | * If we inherit the mountpoint, even from a dataset | |
2704 | * with a received value, the source will be the path of | |
2705 | * the dataset we inherit from. If source is | |
2706 | * ZPROP_SOURCE_VAL_RECVD, the received value is not | |
2707 | * inherited. | |
2708 | */ | |
2709 | if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { | |
2710 | relpath = ""; | |
2711 | } else { | |
2712 | ASSERT0(strncmp(dsname, source, strlen(source))); | |
2713 | relpath = dsname + strlen(source); | |
2714 | if (relpath[0] == '/') | |
2715 | relpath++; | |
2716 | } | |
2717 | ||
2718 | spa_altroot(dp->dp_spa, root, ZAP_MAXVALUELEN); | |
2719 | ||
2720 | /* | |
2721 | * Special case an alternate root of '/'. This will | |
2722 | * avoid having multiple leading slashes in the | |
2723 | * mountpoint path. | |
2724 | */ | |
2725 | if (strcmp(root, "/") == 0) | |
2726 | root++; | |
2727 | ||
2728 | /* | |
2729 | * If the mountpoint is '/' then skip over this | |
2730 | * if we are obtaining either an alternate root or | |
2731 | * an inherited mountpoint. | |
2732 | */ | |
2733 | char *mnt = value; | |
2734 | if (value[1] == '\0' && (root[0] != '\0' || | |
2735 | relpath[0] != '\0')) | |
2736 | mnt = value + 1; | |
2737 | ||
2738 | if (relpath[0] == '\0') { | |
2739 | (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s", | |
2740 | root, mnt); | |
2741 | } else { | |
2742 | (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s%s%s", | |
2743 | root, mnt, relpath[0] == '@' ? "" : "/", | |
2744 | relpath); | |
2745 | } | |
2746 | kmem_free(buf, ZAP_MAXVALUELEN); | |
2747 | } | |
2748 | ||
2749 | return (0); | |
47dfff3b MA |
2750 | } |
2751 | ||
34dc7c2f BB |
2752 | void |
2753 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
2754 | { | |
b858767a | 2755 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
13fe0198 MA |
2756 | |
2757 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 2758 | |
d99a0153 CW |
2759 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, |
2760 | dsl_get_refratio(ds)); | |
24a64651 | 2761 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d99a0153 CW |
2762 | dsl_get_logicalreferenced(ds)); |
2763 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
2764 | dsl_get_compressratio(ds)); | |
2765 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
2766 | dsl_get_used(ds)); | |
6f1ffb06 | 2767 | |
0c66c32d | 2768 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
2769 | get_clones_stat(ds, nv); |
2770 | } else { | |
d99a0153 CW |
2771 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
2772 | if (dsl_get_prev_snap(ds, buf) == 0) | |
2773 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, | |
2774 | buf); | |
6f1ffb06 MA |
2775 | dsl_dir_stats(ds->ds_dir, nv); |
2776 | } | |
34dc7c2f | 2777 | |
30af21b0 PD |
2778 | nvlist_t *propval = fnvlist_alloc(); |
2779 | dsl_get_redact_snaps(ds, propval); | |
2780 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS), | |
2781 | propval); | |
2782 | nvlist_free(propval); | |
2783 | ||
d99a0153 CW |
2784 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, |
2785 | dsl_get_available(ds)); | |
2786 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, | |
2787 | dsl_get_referenced(ds)); | |
34dc7c2f | 2788 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
d99a0153 | 2789 | dsl_get_creation(ds)); |
34dc7c2f | 2790 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d99a0153 | 2791 | dsl_get_creationtxg(ds)); |
34dc7c2f | 2792 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
d99a0153 | 2793 | dsl_get_refquota(ds)); |
34dc7c2f | 2794 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
d99a0153 | 2795 | dsl_get_refreservation(ds)); |
b128c09f | 2796 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d99a0153 | 2797 | dsl_get_guid(ds)); |
428870ff | 2798 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d99a0153 | 2799 | dsl_get_unique(ds)); |
428870ff | 2800 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
d99a0153 | 2801 | dsl_get_objsetid(ds)); |
428870ff | 2802 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, |
d99a0153 | 2803 | dsl_get_userrefs(ds)); |
45d1cae3 | 2804 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
d99a0153 | 2805 | dsl_get_defer_destroy(ds)); |
b5256303 | 2806 | dsl_dataset_crypt_stats(ds, nv); |
34dc7c2f | 2807 | |
d683ddbb | 2808 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
d99a0153 CW |
2809 | uint64_t written; |
2810 | if (dsl_get_written(ds, &written) == 0) { | |
2811 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
2812 | written); | |
330d06f9 MA |
2813 | } |
2814 | } | |
2815 | ||
47dfff3b | 2816 | if (!dsl_dataset_is_snapshot(ds)) { |
47dfff3b MA |
2817 | /* |
2818 | * A failed "newfs" (e.g. full) resumable receive leaves | |
2819 | * the stats set on this dataset. Check here for the prop. | |
2820 | */ | |
2821 | get_receive_resume_stats(ds, nv); | |
2822 | ||
2823 | /* | |
2824 | * A failed incremental resumable receive leaves the | |
2825 | * stats set on our child named "%recv". Check the child | |
2826 | * for the prop. | |
2827 | */ | |
1c27024e DB |
2828 | /* 6 extra bytes for /%recv */ |
2829 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
2830 | dsl_dataset_t *recv_ds; | |
47dfff3b | 2831 | dsl_dataset_name(ds, recvname); |
eca7b760 IK |
2832 | if (strlcat(recvname, "/", sizeof (recvname)) < |
2833 | sizeof (recvname) && | |
2834 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
2835 | sizeof (recvname) && | |
2836 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
47dfff3b MA |
2837 | get_receive_resume_stats(recv_ds, nv); |
2838 | dsl_dataset_rele(recv_ds, FTAG); | |
2839 | } | |
2840 | } | |
34dc7c2f BB |
2841 | } |
2842 | ||
2843 | void | |
2844 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
2845 | { | |
d99a0153 | 2846 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
13fe0198 MA |
2847 | ASSERT(dsl_pool_config_held(dp)); |
2848 | ||
d99a0153 CW |
2849 | stat->dds_creation_txg = dsl_get_creationtxg(ds); |
2850 | stat->dds_inconsistent = dsl_get_inconsistent(ds); | |
2851 | stat->dds_guid = dsl_get_guid(ds); | |
30af21b0 | 2852 | stat->dds_redacted = dsl_get_redacted(ds); |
6f1ffb06 | 2853 | stat->dds_origin[0] = '\0'; |
0c66c32d | 2854 | if (ds->ds_is_snapshot) { |
34dc7c2f | 2855 | stat->dds_is_snapshot = B_TRUE; |
d99a0153 | 2856 | stat->dds_num_clones = dsl_get_numclones(ds); |
fb5f0bc8 BB |
2857 | } else { |
2858 | stat->dds_is_snapshot = B_FALSE; | |
2859 | stat->dds_num_clones = 0; | |
34dc7c2f | 2860 | |
6f1ffb06 | 2861 | if (dsl_dir_is_clone(ds->ds_dir)) { |
d99a0153 | 2862 | dsl_dir_get_origin(ds->ds_dir, stat->dds_origin); |
6f1ffb06 | 2863 | } |
34dc7c2f | 2864 | } |
34dc7c2f BB |
2865 | } |
2866 | ||
2867 | uint64_t | |
2868 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
2869 | { | |
2870 | return (ds->ds_fsid_guid); | |
2871 | } | |
2872 | ||
2873 | void | |
2874 | dsl_dataset_space(dsl_dataset_t *ds, | |
2875 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
2876 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
2877 | { | |
d683ddbb | 2878 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 2879 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
2880 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
2881 | *availbytesp += | |
2882 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
2883 | if (ds->ds_quota != 0) { |
2884 | /* | |
2885 | * Adjust available bytes according to refquota | |
2886 | */ | |
2887 | if (*refdbytesp < ds->ds_quota) | |
2888 | *availbytesp = MIN(*availbytesp, | |
2889 | ds->ds_quota - *refdbytesp); | |
2890 | else | |
2891 | *availbytesp = 0; | |
2892 | } | |
cc9bb3e5 | 2893 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 2894 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
cc9bb3e5 | 2895 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
2896 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
2897 | } | |
2898 | ||
2899 | boolean_t | |
19580676 | 2900 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 2901 | { |
cc9bb3e5 GM |
2902 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
2903 | uint64_t birth; | |
2904 | ||
2905 | ASSERT(dsl_pool_config_held(dp)); | |
19580676 | 2906 | if (snap == NULL) |
34dc7c2f | 2907 | return (B_FALSE); |
cc9bb3e5 GM |
2908 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
2909 | birth = dsl_dataset_get_blkptr(ds)->blk_birth; | |
2910 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
2911 | if (birth > dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 2912 | objset_t *os, *os_snap; |
572e2857 BB |
2913 | /* |
2914 | * It may be that only the ZIL differs, because it was | |
2915 | * reset in the head. Don't count that as being | |
2916 | * modified. | |
2917 | */ | |
2918 | if (dmu_objset_from_ds(ds, &os) != 0) | |
2919 | return (B_TRUE); | |
19580676 | 2920 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
2921 | return (B_TRUE); |
2922 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 2923 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
2924 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
2925 | } | |
34dc7c2f BB |
2926 | return (B_FALSE); |
2927 | } | |
2928 | ||
13fe0198 MA |
2929 | typedef struct dsl_dataset_rename_snapshot_arg { |
2930 | const char *ddrsa_fsname; | |
2931 | const char *ddrsa_oldsnapname; | |
2932 | const char *ddrsa_newsnapname; | |
2933 | boolean_t ddrsa_recursive; | |
2934 | dmu_tx_t *ddrsa_tx; | |
2935 | } dsl_dataset_rename_snapshot_arg_t; | |
2936 | ||
34dc7c2f BB |
2937 | /* ARGSUSED */ |
2938 | static int | |
13fe0198 MA |
2939 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
2940 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2941 | { |
13fe0198 MA |
2942 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2943 | int error; | |
34dc7c2f | 2944 | uint64_t val; |
34dc7c2f | 2945 | |
13fe0198 MA |
2946 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2947 | if (error != 0) { | |
2948 | /* ignore nonexistent snapshots */ | |
2949 | return (error == ENOENT ? 0 : error); | |
2950 | } | |
34dc7c2f | 2951 | |
13fe0198 MA |
2952 | /* new name should not exist */ |
2953 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2954 | if (error == 0) | |
2e528b49 | 2955 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
2956 | else if (error == ENOENT) |
2957 | error = 0; | |
34dc7c2f BB |
2958 | |
2959 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 | 2960 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
eca7b760 | 2961 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 2962 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 2963 | |
13fe0198 | 2964 | return (error); |
34dc7c2f BB |
2965 | } |
2966 | ||
13fe0198 MA |
2967 | static int |
2968 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2969 | { |
13fe0198 MA |
2970 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2971 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 2972 | dsl_dataset_t *hds; |
13fe0198 | 2973 | int error; |
34dc7c2f | 2974 | |
13fe0198 MA |
2975 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
2976 | if (error != 0) | |
2977 | return (error); | |
34dc7c2f | 2978 | |
13fe0198 MA |
2979 | if (ddrsa->ddrsa_recursive) { |
2980 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2981 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2982 | DS_FIND_CHILDREN); | |
2983 | } else { | |
2984 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2985 | } | |
b128c09f | 2986 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 2987 | return (error); |
34dc7c2f BB |
2988 | } |
2989 | ||
34dc7c2f | 2990 | static int |
13fe0198 MA |
2991 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
2992 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2993 | { |
13fe0198 MA |
2994 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2995 | dsl_dataset_t *ds; | |
2996 | uint64_t val; | |
2997 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2998 | int error; | |
34dc7c2f | 2999 | |
13fe0198 MA |
3000 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
3001 | ASSERT(error == 0 || error == ENOENT); | |
3002 | if (error == ENOENT) { | |
3003 | /* ignore nonexistent snapshots */ | |
3004 | return (0); | |
34dc7c2f BB |
3005 | } |
3006 | ||
13fe0198 MA |
3007 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
3008 | ||
3009 | /* log before we change the name */ | |
3010 | spa_history_log_internal_ds(ds, "rename", tx, | |
3011 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 3012 | |
788eb90c JJ |
3013 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
3014 | B_FALSE)); | |
13fe0198 | 3015 | mutex_enter(&ds->ds_lock); |
c9d61adb | 3016 | (void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname, |
3017 | sizeof (ds->ds_snapname)); | |
13fe0198 | 3018 | mutex_exit(&ds->ds_lock); |
d683ddbb JG |
3019 | VERIFY0(zap_add(dp->dp_meta_objset, |
3020 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 3021 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
a0bd735a BP |
3022 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, |
3023 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
34dc7c2f | 3024 | |
13fe0198 | 3025 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
3026 | return (0); |
3027 | } | |
3028 | ||
13fe0198 MA |
3029 | static void |
3030 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 3031 | { |
13fe0198 MA |
3032 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
3033 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3034 | dsl_dataset_t *hds = NULL; |
34dc7c2f | 3035 | |
13fe0198 MA |
3036 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
3037 | ddrsa->ddrsa_tx = tx; | |
3038 | if (ddrsa->ddrsa_recursive) { | |
3039 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
3040 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
3041 | DS_FIND_CHILDREN)); | |
3042 | } else { | |
3043 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 3044 | } |
13fe0198 | 3045 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
3046 | } |
3047 | ||
13fe0198 MA |
3048 | int |
3049 | dsl_dataset_rename_snapshot(const char *fsname, | |
3050 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 3051 | { |
13fe0198 | 3052 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 3053 | |
13fe0198 MA |
3054 | ddrsa.ddrsa_fsname = fsname; |
3055 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
3056 | ddrsa.ddrsa_newsnapname = newsnapname; | |
3057 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 3058 | |
a0bd735a | 3059 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 | 3060 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
a0bd735a | 3061 | 1, ZFS_SPACE_CHECK_RESERVED)); |
34dc7c2f BB |
3062 | } |
3063 | ||
831baf06 KW |
3064 | /* |
3065 | * If we're doing an ownership handoff, we need to make sure that there is | |
3066 | * only one long hold on the dataset. We're not allowed to change anything here | |
3067 | * so we don't permanently release the long hold or regular hold here. We want | |
3068 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
040dab99 | 3069 | * when we release the long hold. |
831baf06 KW |
3070 | */ |
3071 | static int | |
3072 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
3073 | { | |
3074 | boolean_t held; | |
3075 | ||
3076 | if (!dmu_tx_is_syncing(tx)) | |
3077 | return (0); | |
3078 | ||
3079 | if (owner != NULL) { | |
3080 | VERIFY3P(ds->ds_owner, ==, owner); | |
3081 | dsl_dataset_long_rele(ds, owner); | |
3082 | } | |
3083 | ||
040dab99 | 3084 | held = dsl_dataset_long_held(ds); |
831baf06 KW |
3085 | |
3086 | if (owner != NULL) | |
3087 | dsl_dataset_long_hold(ds, owner); | |
3088 | ||
3089 | if (held) | |
3090 | return (SET_ERROR(EBUSY)); | |
3091 | ||
3092 | return (0); | |
3093 | } | |
3094 | ||
af073689 | 3095 | int |
13fe0198 | 3096 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3097 | { |
831baf06 | 3098 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 3099 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 3100 | dsl_dataset_t *ds; |
13fe0198 MA |
3101 | int64_t unused_refres_delta; |
3102 | int error; | |
34dc7c2f | 3103 | |
831baf06 | 3104 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
3105 | if (error != 0) |
3106 | return (error); | |
428870ff | 3107 | |
13fe0198 | 3108 | /* must not be a snapshot */ |
0c66c32d | 3109 | if (ds->ds_is_snapshot) { |
13fe0198 | 3110 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3111 | return (SET_ERROR(EINVAL)); |
13fe0198 | 3112 | } |
34dc7c2f | 3113 | |
13fe0198 | 3114 | /* must have a most recent snapshot */ |
d683ddbb | 3115 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 3116 | dsl_dataset_rele(ds, FTAG); |
13342832 | 3117 | return (SET_ERROR(ESRCH)); |
13fe0198 | 3118 | } |
34dc7c2f | 3119 | |
0efd9791 AG |
3120 | /* |
3121 | * No rollback to a snapshot created in the current txg, because | |
3122 | * the rollback may dirty the dataset and create blocks that are | |
3123 | * not reachable from the rootbp while having a birth txg that | |
3124 | * falls into the snapshot's range. | |
3125 | */ | |
3126 | if (dmu_tx_is_syncing(tx) && | |
3127 | dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) { | |
3128 | dsl_dataset_rele(ds, FTAG); | |
3129 | return (SET_ERROR(EAGAIN)); | |
3130 | } | |
3131 | ||
8ca78ab0 AG |
3132 | /* |
3133 | * If the expected target snapshot is specified, then check that | |
3134 | * the latest snapshot is it. | |
3135 | */ | |
3136 | if (ddra->ddra_tosnap != NULL) { | |
13342832 AG |
3137 | dsl_dataset_t *snapds; |
3138 | ||
3139 | /* Check if the target snapshot exists at all. */ | |
3140 | error = dsl_dataset_hold(dp, ddra->ddra_tosnap, FTAG, &snapds); | |
3141 | if (error != 0) { | |
3142 | /* | |
3143 | * ESRCH is used to signal that the target snapshot does | |
3144 | * not exist, while ENOENT is used to report that | |
3145 | * the rolled back dataset does not exist. | |
3146 | * ESRCH is also used to cover other cases where the | |
3147 | * target snapshot is not related to the dataset being | |
3148 | * rolled back such as being in a different pool. | |
3149 | */ | |
3150 | if (error == ENOENT || error == EXDEV) | |
3151 | error = SET_ERROR(ESRCH); | |
3152 | dsl_dataset_rele(ds, FTAG); | |
3153 | return (error); | |
3154 | } | |
3155 | ASSERT(snapds->ds_is_snapshot); | |
8ca78ab0 | 3156 | |
13342832 AG |
3157 | /* Check if the snapshot is the latest snapshot indeed. */ |
3158 | if (snapds != ds->ds_prev) { | |
3159 | /* | |
3160 | * Distinguish between the case where the only problem | |
3161 | * is intervening snapshots (EEXIST) vs the snapshot | |
3162 | * not being a valid target for rollback (ESRCH). | |
3163 | */ | |
3164 | if (snapds->ds_dir == ds->ds_dir || | |
3165 | (dsl_dir_is_clone(ds->ds_dir) && | |
3166 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj == | |
3167 | snapds->ds_object)) { | |
3168 | error = SET_ERROR(EEXIST); | |
3169 | } else { | |
3170 | error = SET_ERROR(ESRCH); | |
3171 | } | |
3172 | dsl_dataset_rele(snapds, FTAG); | |
3173 | dsl_dataset_rele(ds, FTAG); | |
3174 | return (error); | |
3175 | } | |
3176 | dsl_dataset_rele(snapds, FTAG); | |
8ca78ab0 AG |
3177 | } |
3178 | ||
da536844 | 3179 | /* must not have any bookmarks after the most recent snapshot */ |
30af21b0 PD |
3180 | if (dsl_bookmark_latest_txg(ds) > |
3181 | dsl_dataset_phys(ds)->ds_prev_snap_txg) { | |
13342832 | 3182 | dsl_dataset_rele(ds, FTAG); |
30af21b0 | 3183 | return (SET_ERROR(EEXIST)); |
da536844 | 3184 | } |
da536844 | 3185 | |
831baf06 KW |
3186 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
3187 | if (error != 0) { | |
13fe0198 | 3188 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 3189 | return (error); |
34dc7c2f | 3190 | } |
428870ff | 3191 | |
13fe0198 MA |
3192 | /* |
3193 | * Check if the snap we are rolling back to uses more than | |
3194 | * the refquota. | |
3195 | */ | |
3196 | if (ds->ds_quota != 0 && | |
d683ddbb | 3197 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 3198 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3199 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
3200 | } |
3201 | ||
13fe0198 MA |
3202 | /* |
3203 | * When we do the clone swap, we will temporarily use more space | |
3204 | * due to the refreservation (the head will no longer have any | |
3205 | * unique space, so the entire amount of the refreservation will need | |
3206 | * to be free). We will immediately destroy the clone, freeing | |
3207 | * this space, but the freeing happens over many txg's. | |
3208 | */ | |
3209 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 3210 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 3211 | |
13fe0198 MA |
3212 | if (unused_refres_delta > 0 && |
3213 | unused_refres_delta > | |
3214 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
3215 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3216 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3217 | } |
34dc7c2f | 3218 | |
13fe0198 MA |
3219 | dsl_dataset_rele(ds, FTAG); |
3220 | return (0); | |
3221 | } | |
34dc7c2f | 3222 | |
af073689 | 3223 | void |
13fe0198 MA |
3224 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) |
3225 | { | |
831baf06 | 3226 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
3227 | dsl_pool_t *dp = dmu_tx_pool(tx); |
3228 | dsl_dataset_t *ds, *clone; | |
3229 | uint64_t cloneobj; | |
eca7b760 | 3230 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 3231 | |
831baf06 | 3232 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 3233 | |
46ba1e59 MA |
3234 | dsl_dataset_name(ds->ds_prev, namebuf); |
3235 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
3236 | ||
13fe0198 | 3237 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
b5256303 | 3238 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, NULL, tx); |
13fe0198 MA |
3239 | |
3240 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
3241 | ||
3242 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
3243 | dsl_dataset_zero_zil(ds, tx); | |
3244 | ||
3245 | dsl_destroy_head_sync_impl(clone, tx); | |
3246 | ||
3247 | dsl_dataset_rele(clone, FTAG); | |
3248 | dsl_dataset_rele(ds, FTAG); | |
3249 | } | |
3250 | ||
831baf06 | 3251 | /* |
46ba1e59 MA |
3252 | * Rolls back the given filesystem or volume to the most recent snapshot. |
3253 | * The name of the most recent snapshot will be returned under key "target" | |
3254 | * in the result nvlist. | |
831baf06 | 3255 | * |
46ba1e59 | 3256 | * If owner != NULL: |
831baf06 KW |
3257 | * - The existing dataset MUST be owned by the specified owner at entry |
3258 | * - Upon return, dataset will still be held by the same owner, whether we | |
3259 | * succeed or not. | |
3260 | * | |
3261 | * This mode is required any time the existing filesystem is mounted. See | |
3262 | * notes above zfs_suspend_fs() for further details. | |
3263 | */ | |
13fe0198 | 3264 | int |
8ca78ab0 AG |
3265 | dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, |
3266 | nvlist_t *result) | |
13fe0198 | 3267 | { |
831baf06 KW |
3268 | dsl_dataset_rollback_arg_t ddra; |
3269 | ||
3270 | ddra.ddra_fsname = fsname; | |
8ca78ab0 | 3271 | ddra.ddra_tosnap = tosnap; |
831baf06 | 3272 | ddra.ddra_owner = owner; |
46ba1e59 | 3273 | ddra.ddra_result = result; |
831baf06 | 3274 | |
13fe0198 | 3275 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
3276 | dsl_dataset_rollback_sync, &ddra, |
3277 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
3278 | } |
3279 | ||
b128c09f BB |
3280 | struct promotenode { |
3281 | list_node_t link; | |
3282 | dsl_dataset_t *ds; | |
3283 | }; | |
3284 | ||
b128c09f | 3285 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
3286 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
3287 | void *tag); | |
3288 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 3289 | |
d99a0153 | 3290 | int |
13fe0198 | 3291 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3292 | { |
13fe0198 MA |
3293 | dsl_dataset_promote_arg_t *ddpa = arg; |
3294 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3295 | dsl_dataset_t *hds; | |
3296 | struct promotenode *snap; | |
30af21b0 | 3297 | dsl_dataset_t *origin_ds, *origin_head; |
34dc7c2f | 3298 | int err; |
428870ff | 3299 | uint64_t unused; |
788eb90c | 3300 | uint64_t ss_mv_cnt; |
fec41709 | 3301 | size_t max_snap_len; |
d99a0153 | 3302 | boolean_t conflicting_snaps; |
34dc7c2f | 3303 | |
13fe0198 MA |
3304 | err = promote_hold(ddpa, dp, FTAG); |
3305 | if (err != 0) | |
3306 | return (err); | |
34dc7c2f | 3307 | |
13fe0198 | 3308 | hds = ddpa->ddpa_clone; |
fec41709 | 3309 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 3310 | |
d683ddbb | 3311 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 3312 | promote_rele(ddpa, FTAG); |
2e528b49 | 3313 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
3314 | } |
3315 | ||
b5256303 | 3316 | snap = list_head(&ddpa->shared_snaps); |
30af21b0 | 3317 | origin_head = snap->ds; |
b5256303 TC |
3318 | if (snap == NULL) { |
3319 | err = SET_ERROR(ENOENT); | |
3320 | goto out; | |
3321 | } | |
3322 | origin_ds = snap->ds; | |
3323 | ||
3324 | /* | |
3325 | * Encrypted clones share a DSL Crypto Key with their origin's dsl dir. | |
3326 | * When doing a promote we must make sure the encryption root for | |
3327 | * both the target and the target's origin does not change to avoid | |
3328 | * needing to rewrap encryption keys | |
3329 | */ | |
3330 | err = dsl_dataset_promote_crypt_check(hds->ds_dir, origin_ds->ds_dir); | |
3331 | if (err != 0) | |
3332 | goto out; | |
3333 | ||
13fe0198 MA |
3334 | /* |
3335 | * Compute and check the amount of space to transfer. Since this is | |
3336 | * so expensive, don't do the preliminary check. | |
3337 | */ | |
3338 | if (!dmu_tx_is_syncing(tx)) { | |
3339 | promote_rele(ddpa, FTAG); | |
3340 | return (0); | |
3341 | } | |
3342 | ||
34dc7c2f | 3343 | /* compute origin's new unique space */ |
13fe0198 | 3344 | snap = list_tail(&ddpa->clone_snaps); |
cbce5813 | 3345 | ASSERT(snap != NULL); |
d683ddbb JG |
3346 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
3347 | origin_ds->ds_object); | |
428870ff | 3348 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 3349 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 3350 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 3351 | |
b128c09f BB |
3352 | /* |
3353 | * Walk the snapshots that we are moving | |
3354 | * | |
3355 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 3356 | * to used by each snapshot: |
b128c09f BB |
3357 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
3358 | * So each snapshot gave birth to: | |
3359 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
3360 | * So a sequence would look like: | |
3361 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
3362 | * Which simplifies to: | |
3363 | * uN + kN + kN-1 + ... + k1 + k0 | |
3364 | * Note however, if we stop before we reach the ORIGIN we get: | |
3365 | * uN + kN + kN-1 + ... + kM - uM-1 | |
3366 | */ | |
d99a0153 | 3367 | conflicting_snaps = B_FALSE; |
788eb90c | 3368 | ss_mv_cnt = 0; |
d683ddbb JG |
3369 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
3370 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
3371 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
3372 | for (snap = list_head(&ddpa->shared_snaps); snap; |
3373 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 3374 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 3375 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 3376 | |
788eb90c JJ |
3377 | ss_mv_cnt++; |
3378 | ||
13fe0198 MA |
3379 | /* |
3380 | * If there are long holds, we won't be able to evict | |
3381 | * the objset. | |
3382 | */ | |
3383 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 3384 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
3385 | goto out; |
3386 | } | |
3387 | ||
34dc7c2f | 3388 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 3389 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
3390 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
3391 | err = SET_ERROR(ENAMETOOLONG); | |
3392 | goto out; | |
3393 | } | |
b128c09f | 3394 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 3395 | if (err == 0) { |
d99a0153 CW |
3396 | fnvlist_add_boolean(ddpa->err_ds, |
3397 | snap->ds->ds_snapname); | |
3398 | conflicting_snaps = B_TRUE; | |
3399 | } else if (err != ENOENT) { | |
428870ff BB |
3400 | goto out; |
3401 | } | |
34dc7c2f | 3402 | |
b128c09f | 3403 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 3404 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 3405 | continue; |
34dc7c2f | 3406 | |
428870ff BB |
3407 | dsl_deadlist_space(&ds->ds_deadlist, |
3408 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
3409 | ddpa->used += dlused; |
3410 | ddpa->comp += dlcomp; | |
3411 | ddpa->uncomp += dluncomp; | |
b128c09f | 3412 | } |
34dc7c2f | 3413 | |
30af21b0 PD |
3414 | /* |
3415 | * Check that bookmarks that are being transferred don't have | |
3416 | * name conflicts. | |
3417 | */ | |
3418 | for (dsl_bookmark_node_t *dbn = avl_first(&origin_head->ds_bookmarks); | |
3419 | dbn != NULL && dbn->dbn_phys.zbm_creation_txg <= | |
3420 | dsl_dataset_phys(origin_ds)->ds_creation_txg; | |
3421 | dbn = AVL_NEXT(&origin_head->ds_bookmarks, dbn)) { | |
3422 | if (strlen(dbn->dbn_name) >= max_snap_len) { | |
3423 | err = SET_ERROR(ENAMETOOLONG); | |
3424 | goto out; | |
3425 | } | |
3426 | zfs_bookmark_phys_t bm; | |
3427 | err = dsl_bookmark_lookup_impl(ddpa->ddpa_clone, | |
3428 | dbn->dbn_name, &bm); | |
3429 | ||
3430 | if (err == 0) { | |
3431 | fnvlist_add_boolean(ddpa->err_ds, dbn->dbn_name); | |
3432 | conflicting_snaps = B_TRUE; | |
3433 | } else if (err == ESRCH) { | |
3434 | err = 0; | |
3435 | } else if (err != 0) { | |
3436 | goto out; | |
3437 | } | |
3438 | } | |
3439 | ||
d99a0153 CW |
3440 | /* |
3441 | * In order to return the full list of conflicting snapshots, we check | |
3442 | * whether there was a conflict after traversing all of them. | |
3443 | */ | |
3444 | if (conflicting_snaps) { | |
3445 | err = SET_ERROR(EEXIST); | |
3446 | goto out; | |
3447 | } | |
3448 | ||
b128c09f BB |
3449 | /* |
3450 | * If we are a clone of a clone then we never reached ORIGIN, | |
3451 | * so we need to subtract out the clone origin's used space. | |
3452 | */ | |
13fe0198 | 3453 | if (ddpa->origin_origin) { |
d683ddbb JG |
3454 | ddpa->used -= |
3455 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
3456 | ddpa->comp -= | |
3457 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 3458 | ddpa->uncomp -= |
d683ddbb JG |
3459 | dsl_dataset_phys(ddpa->origin_origin)-> |
3460 | ds_uncompressed_bytes; | |
34dc7c2f BB |
3461 | } |
3462 | ||
788eb90c | 3463 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 3464 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 3465 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
3466 | if (err != 0) |
3467 | goto out; | |
34dc7c2f | 3468 | |
b128c09f BB |
3469 | /* |
3470 | * Compute the amounts of space that will be used by snapshots | |
3471 | * after the promotion (for both origin and clone). For each, | |
3472 | * it is the amount of space that will be on all of their | |
3473 | * deadlists (that was not born before their new origin). | |
3474 | */ | |
d683ddbb | 3475 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
3476 | uint64_t space; |
3477 | ||
3478 | /* | |
3479 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
3480 | * so dd_origin_txg will be < TXG_INITIAL, so |
3481 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
3482 | * calls will be fast because they do not have to |
3483 | * iterate over all bps. | |
3484 | */ | |
13fe0198 | 3485 | snap = list_head(&ddpa->origin_snaps); |
0a8f18f9 | 3486 | if (snap == NULL) { |
3487 | err = SET_ERROR(ENOENT); | |
3488 | goto out; | |
3489 | } | |
13fe0198 MA |
3490 | err = snaplist_space(&ddpa->shared_snaps, |
3491 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
3492 | if (err != 0) | |
3493 | goto out; | |
b128c09f | 3494 | |
13fe0198 | 3495 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 3496 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
3497 | if (err != 0) |
3498 | goto out; | |
3499 | ddpa->cloneusedsnap += space; | |
b128c09f | 3500 | } |
d683ddbb JG |
3501 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
3502 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 3503 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
3504 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
3505 | &ddpa->originusedsnap); | |
13fe0198 MA |
3506 | if (err != 0) |
3507 | goto out; | |
b128c09f BB |
3508 | } |
3509 | ||
428870ff | 3510 | out: |
13fe0198 | 3511 | promote_rele(ddpa, FTAG); |
428870ff | 3512 | return (err); |
34dc7c2f BB |
3513 | } |
3514 | ||
d99a0153 | 3515 | void |
13fe0198 | 3516 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3517 | { |
13fe0198 MA |
3518 | dsl_dataset_promote_arg_t *ddpa = arg; |
3519 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3520 | dsl_dataset_t *hds; | |
3521 | struct promotenode *snap; | |
3522 | dsl_dataset_t *origin_ds; | |
b128c09f | 3523 | dsl_dataset_t *origin_head; |
13fe0198 | 3524 | dsl_dir_t *dd; |
34dc7c2f | 3525 | dsl_dir_t *odd = NULL; |
b128c09f BB |
3526 | uint64_t oldnext_obj; |
3527 | int64_t delta; | |
34dc7c2f | 3528 | |
37f03da8 SH |
3529 | ASSERT(nvlist_empty(ddpa->err_ds)); |
3530 | ||
13fe0198 MA |
3531 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
3532 | hds = ddpa->ddpa_clone; | |
3533 | ||
d683ddbb | 3534 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
3535 | |
3536 | snap = list_head(&ddpa->shared_snaps); | |
3537 | origin_ds = snap->ds; | |
3538 | dd = hds->ds_dir; | |
34dc7c2f | 3539 | |
13fe0198 | 3540 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
3541 | origin_head = snap->ds; |
3542 | ||
34dc7c2f BB |
3543 | /* |
3544 | * We need to explicitly open odd, since origin_ds's dd will be | |
3545 | * changing. | |
3546 | */ | |
13fe0198 | 3547 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
3548 | NULL, FTAG, &odd)); |
3549 | ||
b5256303 TC |
3550 | dsl_dataset_promote_crypt_sync(hds->ds_dir, odd, tx); |
3551 | ||
b128c09f BB |
3552 | /* change origin's next snap */ |
3553 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 3554 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 3555 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
3556 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
3557 | origin_ds->ds_object); | |
3558 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
3559 | |
3560 | /* change the origin's next clone */ | |
d683ddbb | 3561 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
3562 | dsl_dataset_remove_from_next_clones(origin_ds, |
3563 | snap->ds->ds_object, tx); | |
3564 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 3565 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
3566 | oldnext_obj, tx)); |
3567 | } | |
3568 | ||
3569 | /* change origin */ | |
3570 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
3571 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
3572 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 3573 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 3574 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 3575 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 3576 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 3577 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
3578 | |
3579 | /* change dd_clone entries */ | |
3580 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 3581 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3582 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 3583 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3584 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
3585 | hds->ds_object, tx)); |
3586 | ||
13fe0198 | 3587 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3588 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 3589 | origin_head->ds_object, tx)); |
d683ddbb JG |
3590 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
3591 | dsl_dir_phys(dd)->dd_clones = | |
3592 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
3593 | DMU_OT_NONE, 0, tx); | |
428870ff | 3594 | } |
13fe0198 | 3595 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3596 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 3597 | } |
34dc7c2f | 3598 | |
30af21b0 PD |
3599 | /* |
3600 | * Move bookmarks to this dir. | |
3601 | */ | |
3602 | dsl_bookmark_node_t *dbn_next; | |
3603 | for (dsl_bookmark_node_t *dbn = avl_first(&origin_head->ds_bookmarks); | |
3604 | dbn != NULL && dbn->dbn_phys.zbm_creation_txg <= | |
3605 | dsl_dataset_phys(origin_ds)->ds_creation_txg; | |
3606 | dbn = dbn_next) { | |
3607 | dbn_next = AVL_NEXT(&origin_head->ds_bookmarks, dbn); | |
3608 | ||
3609 | avl_remove(&origin_head->ds_bookmarks, dbn); | |
3610 | VERIFY0(zap_remove(dp->dp_meta_objset, | |
3611 | origin_head->ds_bookmarks_obj, dbn->dbn_name, tx)); | |
3612 | ||
3613 | dsl_bookmark_node_add(hds, dbn, tx); | |
3614 | } | |
3615 | ||
3616 | dsl_bookmark_next_changed(hds, origin_ds, tx); | |
3617 | ||
b128c09f | 3618 | /* move snapshots to this dir */ |
13fe0198 MA |
3619 | for (snap = list_head(&ddpa->shared_snaps); snap; |
3620 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
3621 | dsl_dataset_t *ds = snap->ds; |
3622 | ||
13fe0198 MA |
3623 | /* |
3624 | * Property callbacks are registered to a particular | |
3625 | * dsl_dir. Since ours is changing, evict the objset | |
3626 | * so that they will be unregistered from the old dsl_dir. | |
3627 | */ | |
428870ff BB |
3628 | if (ds->ds_objset) { |
3629 | dmu_objset_evict(ds->ds_objset); | |
3630 | ds->ds_objset = NULL; | |
b128c09f | 3631 | } |
13fe0198 | 3632 | |
34dc7c2f | 3633 | /* move snap name entry */ |
13fe0198 MA |
3634 | VERIFY0(dsl_dataset_get_snapname(ds)); |
3635 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 3636 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 3637 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 3638 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 3639 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
3640 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
3641 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 3642 | |
34dc7c2f BB |
3643 | /* change containing dsl_dir */ |
3644 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
3645 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
3646 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 3647 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
3648 | dsl_dir_rele(ds->ds_dir, ds); |
3649 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
3650 | NULL, ds, &ds->ds_dir)); |
3651 | ||
428870ff | 3652 | /* move any clone references */ |
d683ddbb | 3653 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
3654 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
3655 | zap_cursor_t zc; | |
3656 | zap_attribute_t za; | |
3657 | ||
3658 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 3659 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 3660 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
3661 | zap_cursor_advance(&zc)) { |
3662 | dsl_dataset_t *cnds; | |
3663 | uint64_t o; | |
34dc7c2f | 3664 | |
13fe0198 MA |
3665 | if (za.za_first_integer == oldnext_obj) { |
3666 | /* | |
3667 | * We've already moved the | |
3668 | * origin's reference. | |
3669 | */ | |
3670 | continue; | |
3671 | } | |
34dc7c2f | 3672 | |
13fe0198 MA |
3673 | VERIFY0(dsl_dataset_hold_obj(dp, |
3674 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
3675 | o = dsl_dir_phys(cnds->ds_dir)-> |
3676 | dd_head_dataset_obj; | |
34dc7c2f | 3677 | |
13fe0198 | 3678 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3679 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 3680 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3681 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
3682 | dsl_dataset_rele(cnds, FTAG); |
3683 | } | |
3684 | zap_cursor_fini(&zc); | |
3685 | } | |
34dc7c2f | 3686 | |
13fe0198 | 3687 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
3688 | } |
3689 | ||
34dc7c2f | 3690 | /* |
13fe0198 MA |
3691 | * Change space accounting. |
3692 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
3693 | * both be valid, or both be 0 (resulting in delta == 0). This | |
3694 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 3695 | */ |
570827e1 | 3696 | |
13fe0198 | 3697 | delta = ddpa->cloneusedsnap - |
d683ddbb | 3698 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
3699 | ASSERT3S(delta, >=, 0); |
3700 | ASSERT3U(ddpa->used, >=, delta); | |
3701 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
3702 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
3703 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 3704 | |
13fe0198 | 3705 | delta = ddpa->originusedsnap - |
d683ddbb | 3706 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
3707 | ASSERT3S(delta, <=, 0); |
3708 | ASSERT3U(ddpa->used, >=, -delta); | |
3709 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
3710 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
3711 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
3712 | ||
d683ddbb | 3713 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 | 3714 | |
37f03da8 SH |
3715 | /* |
3716 | * Since livelists are specific to a clone's origin txg, they | |
3717 | * are no longer accurate. Destroy the livelist from the clone being | |
3718 | * promoted. If the origin dataset is a clone, destroy its livelist | |
3719 | * as well. | |
3720 | */ | |
3721 | dsl_dir_remove_livelist(dd, tx, B_TRUE); | |
3722 | dsl_dir_remove_livelist(origin_ds->ds_dir, tx, B_TRUE); | |
3723 | ||
13fe0198 | 3724 | /* log history record */ |
74756182 | 3725 | spa_history_log_internal_ds(hds, "promote", tx, " "); |
13fe0198 MA |
3726 | |
3727 | dsl_dir_rele(odd, FTAG); | |
3728 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
3729 | } |
3730 | ||
13fe0198 MA |
3731 | /* |
3732 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
3733 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
3734 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
3735 | * snapshots back to this dataset's origin. | |
3736 | */ | |
34dc7c2f | 3737 | static int |
13fe0198 MA |
3738 | snaplist_make(dsl_pool_t *dp, |
3739 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 3740 | { |
13fe0198 | 3741 | uint64_t obj = last_obj; |
34dc7c2f | 3742 | |
13fe0198 MA |
3743 | list_create(l, sizeof (struct promotenode), |
3744 | offsetof(struct promotenode, link)); | |
34dc7c2f | 3745 | |
13fe0198 MA |
3746 | while (obj != first_obj) { |
3747 | dsl_dataset_t *ds; | |
3748 | struct promotenode *snap; | |
3749 | int err; | |
428870ff | 3750 | |
13fe0198 MA |
3751 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
3752 | ASSERT(err != ENOENT); | |
3753 | if (err != 0) | |
3754 | return (err); | |
34dc7c2f | 3755 | |
13fe0198 | 3756 | if (first_obj == 0) |
d683ddbb | 3757 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 3758 | |
79c76d5b | 3759 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
3760 | snap->ds = ds; |
3761 | list_insert_tail(l, snap); | |
d683ddbb | 3762 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 3763 | } |
34dc7c2f BB |
3764 | |
3765 | return (0); | |
3766 | } | |
3767 | ||
13fe0198 MA |
3768 | static int |
3769 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 3770 | { |
13fe0198 | 3771 | struct promotenode *snap; |
6f1ffb06 | 3772 | |
13fe0198 MA |
3773 | *spacep = 0; |
3774 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
3775 | uint64_t used, comp, uncomp; | |
3776 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
3777 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
3778 | *spacep += used; | |
428870ff | 3779 | } |
13fe0198 | 3780 | return (0); |
34dc7c2f BB |
3781 | } |
3782 | ||
13fe0198 MA |
3783 | static void |
3784 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 3785 | { |
13fe0198 | 3786 | struct promotenode *snap; |
428870ff | 3787 | |
13fe0198 MA |
3788 | if (l == NULL || !list_link_active(&l->list_head)) |
3789 | return; | |
34dc7c2f | 3790 | |
13fe0198 MA |
3791 | while ((snap = list_tail(l)) != NULL) { |
3792 | list_remove(l, snap); | |
3793 | dsl_dataset_rele(snap->ds, tag); | |
3794 | kmem_free(snap, sizeof (*snap)); | |
3795 | } | |
3796 | list_destroy(l); | |
34dc7c2f BB |
3797 | } |
3798 | ||
3799 | static int | |
13fe0198 | 3800 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 3801 | { |
13fe0198 MA |
3802 | int error; |
3803 | dsl_dir_t *dd; | |
3804 | struct promotenode *snap; | |
34dc7c2f | 3805 | |
13fe0198 MA |
3806 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
3807 | &ddpa->ddpa_clone); | |
3808 | if (error != 0) | |
3809 | return (error); | |
3810 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 3811 | |
0c66c32d | 3812 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
3813 | !dsl_dir_is_clone(dd)) { |
3814 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 3815 | return (SET_ERROR(EINVAL)); |
13fe0198 | 3816 | } |
34dc7c2f | 3817 | |
d683ddbb | 3818 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
3819 | &ddpa->shared_snaps, tag); |
3820 | if (error != 0) | |
3821 | goto out; | |
34dc7c2f | 3822 | |
13fe0198 MA |
3823 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
3824 | &ddpa->clone_snaps, tag); | |
3825 | if (error != 0) | |
3826 | goto out; | |
34dc7c2f | 3827 | |
13fe0198 | 3828 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
3829 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
3830 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
3831 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
3832 | &ddpa->origin_snaps, tag); |
3833 | if (error != 0) | |
3834 | goto out; | |
d164b209 | 3835 | |
d683ddbb | 3836 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 3837 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 3838 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
3839 | tag, &ddpa->origin_origin); |
3840 | if (error != 0) | |
3841 | goto out; | |
d164b209 | 3842 | } |
13fe0198 MA |
3843 | out: |
3844 | if (error != 0) | |
3845 | promote_rele(ddpa, tag); | |
3846 | return (error); | |
34dc7c2f BB |
3847 | } |
3848 | ||
34dc7c2f | 3849 | static void |
13fe0198 | 3850 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 3851 | { |
13fe0198 MA |
3852 | snaplist_destroy(&ddpa->shared_snaps, tag); |
3853 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
3854 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
3855 | if (ddpa->origin_origin != NULL) | |
3856 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
3857 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
3858 | } | |
428870ff | 3859 | |
13fe0198 MA |
3860 | /* |
3861 | * Promote a clone. | |
3862 | * | |
3863 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
eca7b760 | 3864 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
13fe0198 MA |
3865 | */ |
3866 | int | |
3867 | dsl_dataset_promote(const char *name, char *conflsnap) | |
3868 | { | |
3869 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
3870 | uint64_t numsnaps; | |
3871 | int error; | |
d99a0153 | 3872 | nvpair_t *snap_pair; |
13fe0198 | 3873 | objset_t *os; |
34dc7c2f | 3874 | |
13fe0198 MA |
3875 | /* |
3876 | * We will modify space proportional to the number of | |
3877 | * snapshots. Compute numsnaps. | |
3878 | */ | |
3879 | error = dmu_objset_hold(name, FTAG, &os); | |
3880 | if (error != 0) | |
3881 | return (error); | |
3882 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
3883 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
3884 | &numsnaps); | |
13fe0198 MA |
3885 | dmu_objset_rele(os, FTAG); |
3886 | if (error != 0) | |
3887 | return (error); | |
34dc7c2f | 3888 | |
13fe0198 | 3889 | ddpa.ddpa_clonename = name; |
d99a0153 | 3890 | ddpa.err_ds = fnvlist_alloc(); |
788eb90c | 3891 | ddpa.cr = CRED(); |
6f1ffb06 | 3892 | |
d99a0153 | 3893 | error = dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 | 3894 | dsl_dataset_promote_sync, &ddpa, |
d99a0153 CW |
3895 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED); |
3896 | ||
3897 | /* | |
3898 | * Return the first conflicting snapshot found. | |
3899 | */ | |
3900 | snap_pair = nvlist_next_nvpair(ddpa.err_ds, NULL); | |
3901 | if (snap_pair != NULL && conflsnap != NULL) | |
3902 | (void) strcpy(conflsnap, nvpair_name(snap_pair)); | |
3903 | ||
3904 | fnvlist_free(ddpa.err_ds); | |
3905 | return (error); | |
34dc7c2f BB |
3906 | } |
3907 | ||
3908 | int | |
13fe0198 | 3909 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 3910 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 3911 | { |
8c62a0d0 DM |
3912 | /* |
3913 | * "slack" factor for received datasets with refquota set on them. | |
3914 | * See the bottom of this function for details on its use. | |
3915 | */ | |
bf18fd89 CIK |
3916 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * |
3917 | spa_asize_inflation; | |
13fe0198 | 3918 | int64_t unused_refres_delta; |
34dc7c2f | 3919 | |
13fe0198 | 3920 | /* they should both be heads */ |
0c66c32d JG |
3921 | if (clone->ds_is_snapshot || |
3922 | origin_head->ds_is_snapshot) | |
2e528b49 | 3923 | return (SET_ERROR(EINVAL)); |
428870ff | 3924 | |
19580676 MA |
3925 | /* if we are not forcing, the branch point should be just before them */ |
3926 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 3927 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 3928 | |
13fe0198 MA |
3929 | /* clone should be the clone (unless they are unrelated) */ |
3930 | if (clone->ds_prev != NULL && | |
3931 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 3932 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 3933 | return (SET_ERROR(EINVAL)); |
428870ff | 3934 | |
13fe0198 MA |
3935 | /* the clone should be a child of the origin */ |
3936 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 3937 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 3938 | |
13fe0198 | 3939 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
3940 | if (!force && |
3941 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 3942 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 3943 | |
13fe0198 | 3944 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 3945 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 3946 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
3947 | |
3948 | /* check amount of any unconsumed refreservation */ | |
3949 | unused_refres_delta = | |
3950 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 3951 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3952 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3953 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3954 | |
3955 | if (unused_refres_delta > 0 && | |
3956 | unused_refres_delta > | |
3957 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 3958 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3959 | |
8c62a0d0 DM |
3960 | /* |
3961 | * The clone can't be too much over the head's refquota. | |
3962 | * | |
3963 | * To ensure that the entire refquota can be used, we allow one | |
e1cfd73f | 3964 | * transaction to exceed the refquota. Therefore, this check |
8c62a0d0 DM |
3965 | * needs to also allow for the space referenced to be more than the |
3966 | * refquota. The maximum amount of space that one transaction can use | |
3967 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
3968 | * overage ensures that we are able to receive a filesystem that | |
3969 | * exceeds the refquota on the source system. | |
3970 | * | |
3971 | * So that overage is the refquota_slack we use below. | |
3972 | */ | |
13fe0198 | 3973 | if (origin_head->ds_quota != 0 && |
d683ddbb | 3974 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
8c62a0d0 | 3975 | origin_head->ds_quota + refquota_slack) |
2e528b49 | 3976 | return (SET_ERROR(EDQUOT)); |
572e2857 | 3977 | |
13fe0198 | 3978 | return (0); |
572e2857 BB |
3979 | } |
3980 | ||
a1d477c2 MA |
3981 | static void |
3982 | dsl_dataset_swap_remap_deadlists(dsl_dataset_t *clone, | |
3983 | dsl_dataset_t *origin, dmu_tx_t *tx) | |
3984 | { | |
3985 | uint64_t clone_remap_dl_obj, origin_remap_dl_obj; | |
3986 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3987 | ||
3988 | ASSERT(dsl_pool_sync_context(dp)); | |
3989 | ||
3990 | clone_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(clone); | |
3991 | origin_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(origin); | |
3992 | ||
3993 | if (clone_remap_dl_obj != 0) { | |
3994 | dsl_deadlist_close(&clone->ds_remap_deadlist); | |
3995 | dsl_dataset_unset_remap_deadlist_object(clone, tx); | |
3996 | } | |
3997 | if (origin_remap_dl_obj != 0) { | |
3998 | dsl_deadlist_close(&origin->ds_remap_deadlist); | |
3999 | dsl_dataset_unset_remap_deadlist_object(origin, tx); | |
4000 | } | |
4001 | ||
4002 | if (clone_remap_dl_obj != 0) { | |
4003 | dsl_dataset_set_remap_deadlist_object(origin, | |
4004 | clone_remap_dl_obj, tx); | |
4005 | dsl_deadlist_open(&origin->ds_remap_deadlist, | |
4006 | dp->dp_meta_objset, clone_remap_dl_obj); | |
4007 | } | |
4008 | if (origin_remap_dl_obj != 0) { | |
4009 | dsl_dataset_set_remap_deadlist_object(clone, | |
4010 | origin_remap_dl_obj, tx); | |
4011 | dsl_deadlist_open(&clone->ds_remap_deadlist, | |
4012 | dp->dp_meta_objset, origin_remap_dl_obj); | |
4013 | } | |
4014 | } | |
4015 | ||
572e2857 | 4016 | void |
13fe0198 MA |
4017 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
4018 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 4019 | { |
13fe0198 MA |
4020 | dsl_pool_t *dp = dmu_tx_pool(tx); |
4021 | int64_t unused_refres_delta; | |
428870ff | 4022 | |
13fe0198 | 4023 | ASSERT(clone->ds_reserved == 0); |
8c62a0d0 DM |
4024 | /* |
4025 | * NOTE: On DEBUG kernels there could be a race between this and | |
4026 | * the check function if spa_asize_inflation is adjusted... | |
4027 | */ | |
13fe0198 | 4028 | ASSERT(origin_head->ds_quota == 0 || |
8c62a0d0 DM |
4029 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
4030 | DMU_MAX_ACCESS * spa_asize_inflation); | |
19580676 | 4031 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 4032 | |
241b5415 MA |
4033 | /* |
4034 | * Swap per-dataset feature flags. | |
4035 | */ | |
4a5d7f82 | 4036 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
4037 | if (!(spa_feature_table[f].fi_flags & |
4038 | ZFEATURE_FLAG_PER_DATASET)) { | |
d52d80b7 PD |
4039 | ASSERT(!dsl_dataset_feature_is_active(clone, f)); |
4040 | ASSERT(!dsl_dataset_feature_is_active(origin_head, f)); | |
241b5415 MA |
4041 | continue; |
4042 | } | |
4043 | ||
d52d80b7 PD |
4044 | boolean_t clone_inuse = dsl_dataset_feature_is_active(clone, f); |
4045 | void *clone_feature = clone->ds_feature[f]; | |
4046 | boolean_t origin_head_inuse = | |
4047 | dsl_dataset_feature_is_active(origin_head, f); | |
4048 | void *origin_head_feature = origin_head->ds_feature[f]; | |
4049 | ||
4050 | if (clone_inuse) | |
4051 | dsl_dataset_deactivate_feature_impl(clone, f, tx); | |
4052 | if (origin_head_inuse) | |
4053 | dsl_dataset_deactivate_feature_impl(origin_head, f, tx); | |
241b5415 MA |
4054 | |
4055 | if (clone_inuse) { | |
d52d80b7 PD |
4056 | dsl_dataset_activate_feature(origin_head->ds_object, f, |
4057 | clone_feature, tx); | |
4058 | origin_head->ds_feature[f] = clone_feature; | |
241b5415 MA |
4059 | } |
4060 | if (origin_head_inuse) { | |
d52d80b7 PD |
4061 | dsl_dataset_activate_feature(clone->ds_object, f, |
4062 | origin_head_feature, tx); | |
4063 | clone->ds_feature[f] = origin_head_feature; | |
241b5415 MA |
4064 | } |
4065 | } | |
4066 | ||
13fe0198 MA |
4067 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
4068 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 4069 | |
13fe0198 MA |
4070 | if (clone->ds_objset != NULL) { |
4071 | dmu_objset_evict(clone->ds_objset); | |
4072 | clone->ds_objset = NULL; | |
4073 | } | |
45d1cae3 | 4074 | |
13fe0198 MA |
4075 | if (origin_head->ds_objset != NULL) { |
4076 | dmu_objset_evict(origin_head->ds_objset); | |
4077 | origin_head->ds_objset = NULL; | |
45d1cae3 | 4078 | } |
45d1cae3 | 4079 | |
13fe0198 MA |
4080 | unused_refres_delta = |
4081 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 4082 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 4083 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 4084 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
4085 | |
4086 | /* | |
30af21b0 | 4087 | * Reset origin's unique bytes. |
13fe0198 | 4088 | */ |
30af21b0 | 4089 | { |
13fe0198 MA |
4090 | dsl_dataset_t *origin = clone->ds_prev; |
4091 | uint64_t comp, uncomp; | |
4092 | ||
4093 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
4094 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
4095 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
4096 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
4097 | } |
4098 | ||
4099 | /* swap blkptrs */ | |
4100 | { | |
cc9bb3e5 GM |
4101 | rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG); |
4102 | rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG); | |
1c27024e | 4103 | blkptr_t tmp; |
d683ddbb JG |
4104 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
4105 | dsl_dataset_phys(origin_head)->ds_bp = | |
4106 | dsl_dataset_phys(clone)->ds_bp; | |
4107 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
cc9bb3e5 GM |
4108 | rrw_exit(&origin_head->ds_bp_rwlock, FTAG); |
4109 | rrw_exit(&clone->ds_bp_rwlock, FTAG); | |
13fe0198 MA |
4110 | } |
4111 | ||
4112 | /* set dd_*_bytes */ | |
4113 | { | |
4114 | int64_t dused, dcomp, duncomp; | |
4115 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
4116 | uint64_t odl_used, odl_comp, odl_uncomp; | |
4117 | ||
d683ddbb | 4118 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
4119 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
4120 | ||
4121 | dsl_deadlist_space(&clone->ds_deadlist, | |
4122 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
4123 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
4124 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 4125 | |
d683ddbb JG |
4126 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
4127 | cdl_used - | |
4128 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
4129 | odl_used); | |
4130 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
4131 | cdl_comp - | |
4132 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
4133 | odl_comp); | |
4134 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 4135 | cdl_uncomp - |
d683ddbb JG |
4136 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
4137 | odl_uncomp); | |
45d1cae3 | 4138 | |
13fe0198 MA |
4139 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
4140 | dused, dcomp, duncomp, tx); | |
4141 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
4142 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 4143 | |
45d1cae3 | 4144 | /* |
13fe0198 MA |
4145 | * The difference in the space used by snapshots is the |
4146 | * difference in snapshot space due to the head's | |
4147 | * deadlist (since that's the only thing that's | |
4148 | * changing that affects the snapused). | |
45d1cae3 | 4149 | */ |
13fe0198 MA |
4150 | dsl_deadlist_space_range(&clone->ds_deadlist, |
4151 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
4152 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
4153 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
4154 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
4155 | &odl_used, &odl_comp, &odl_uncomp); | |
4156 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
4157 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 4158 | } |
45d1cae3 | 4159 | |
13fe0198 | 4160 | /* swap ds_*_bytes */ |
d683ddbb JG |
4161 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
4162 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
4163 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
4164 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
4165 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
4166 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
4167 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
4168 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 4169 | |
13fe0198 MA |
4170 | /* apply any parent delta for change in unconsumed refreservation */ |
4171 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
4172 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 4173 | |
13fe0198 MA |
4174 | /* |
4175 | * Swap deadlists. | |
4176 | */ | |
4177 | dsl_deadlist_close(&clone->ds_deadlist); | |
4178 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
4179 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
4180 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 4181 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 4182 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 4183 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 4184 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
a1d477c2 | 4185 | dsl_dataset_swap_remap_deadlists(clone, origin_head, tx); |
45d1cae3 | 4186 | |
30af21b0 PD |
4187 | /* |
4188 | * If there is a bookmark at the origin, its "next dataset" is | |
4189 | * changing, so we need to reset its FBN. | |
4190 | */ | |
4191 | dsl_bookmark_next_changed(origin_head, origin_head->ds_prev, tx); | |
4192 | ||
13fe0198 | 4193 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 4194 | |
37f03da8 SH |
4195 | /* |
4196 | * Destroy any livelists associated with the clone or the origin, | |
4197 | * since after the swap the corresponding livelists are no longer | |
4198 | * valid. | |
4199 | */ | |
4200 | dsl_dir_remove_livelist(clone->ds_dir, tx, B_TRUE); | |
4201 | dsl_dir_remove_livelist(origin_head->ds_dir, tx, B_TRUE); | |
4202 | ||
13fe0198 MA |
4203 | spa_history_log_internal_ds(clone, "clone swap", tx, |
4204 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
4205 | } |
4206 | ||
13fe0198 MA |
4207 | /* |
4208 | * Given a pool name and a dataset object number in that pool, | |
4209 | * return the name of that dataset. | |
4210 | */ | |
572e2857 | 4211 | int |
13fe0198 | 4212 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 4213 | { |
13fe0198 MA |
4214 | dsl_pool_t *dp; |
4215 | dsl_dataset_t *ds; | |
572e2857 BB |
4216 | int error; |
4217 | ||
13fe0198 MA |
4218 | error = dsl_pool_hold(pname, FTAG, &dp); |
4219 | if (error != 0) | |
4220 | return (error); | |
4221 | ||
4222 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
4223 | if (error == 0) { | |
4224 | dsl_dataset_name(ds, buf); | |
4225 | dsl_dataset_rele(ds, FTAG); | |
4226 | } | |
4227 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
4228 | |
4229 | return (error); | |
4230 | } | |
4231 | ||
45d1cae3 | 4232 | int |
13fe0198 MA |
4233 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
4234 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 4235 | { |
13fe0198 | 4236 | int error = 0; |
45d1cae3 | 4237 | |
13fe0198 | 4238 | ASSERT3S(asize, >, 0); |
45d1cae3 | 4239 | |
13fe0198 MA |
4240 | /* |
4241 | * *ref_rsrv is the portion of asize that will come from any | |
4242 | * unconsumed refreservation space. | |
4243 | */ | |
4244 | *ref_rsrv = 0; | |
45d1cae3 | 4245 | |
13fe0198 MA |
4246 | mutex_enter(&ds->ds_lock); |
4247 | /* | |
4248 | * Make a space adjustment for reserved bytes. | |
4249 | */ | |
d683ddbb | 4250 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 4251 | ASSERT3U(*used, >=, |
d683ddbb JG |
4252 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
4253 | *used -= | |
4254 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
4255 | *ref_rsrv = |
4256 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
4257 | } |
4258 | ||
13fe0198 MA |
4259 | if (!check_quota || ds->ds_quota == 0) { |
4260 | mutex_exit(&ds->ds_lock); | |
4261 | return (0); | |
45d1cae3 | 4262 | } |
13fe0198 MA |
4263 | /* |
4264 | * If they are requesting more space, and our current estimate | |
4265 | * is over quota, they get to try again unless the actual | |
4266 | * on-disk is over quota and there are no pending changes (which | |
4267 | * may free up space for us). | |
4268 | */ | |
d683ddbb JG |
4269 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
4270 | ds->ds_quota) { | |
13fe0198 | 4271 | if (inflight > 0 || |
d683ddbb | 4272 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 4273 | error = SET_ERROR(ERESTART); |
13fe0198 | 4274 | else |
2e528b49 | 4275 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 4276 | } |
13fe0198 | 4277 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 4278 | |
45d1cae3 BB |
4279 | return (error); |
4280 | } | |
4281 | ||
13fe0198 MA |
4282 | typedef struct dsl_dataset_set_qr_arg { |
4283 | const char *ddsqra_name; | |
4284 | zprop_source_t ddsqra_source; | |
4285 | uint64_t ddsqra_value; | |
4286 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 4287 | |
13fe0198 MA |
4288 | |
4289 | /* ARGSUSED */ | |
45d1cae3 | 4290 | static int |
13fe0198 | 4291 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 4292 | { |
13fe0198 MA |
4293 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4294 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
4295 | dsl_dataset_t *ds; | |
45d1cae3 | 4296 | int error; |
13fe0198 | 4297 | uint64_t newval; |
45d1cae3 | 4298 | |
13fe0198 | 4299 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 4300 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 4301 | |
13fe0198 MA |
4302 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
4303 | if (error != 0) | |
4304 | return (error); | |
4305 | ||
0c66c32d | 4306 | if (ds->ds_is_snapshot) { |
13fe0198 | 4307 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 4308 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
4309 | } |
4310 | ||
13fe0198 MA |
4311 | error = dsl_prop_predict(ds->ds_dir, |
4312 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
4313 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
4314 | if (error != 0) { | |
4315 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
4316 | return (error); |
4317 | } | |
4318 | ||
13fe0198 MA |
4319 | if (newval == 0) { |
4320 | dsl_dataset_rele(ds, FTAG); | |
4321 | return (0); | |
4322 | } | |
4323 | ||
d683ddbb | 4324 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
4325 | newval < ds->ds_reserved) { |
4326 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 4327 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 4328 | } |
45d1cae3 | 4329 | |
13fe0198 | 4330 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
4331 | return (0); |
4332 | } | |
4333 | ||
13fe0198 MA |
4334 | static void |
4335 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 4336 | { |
13fe0198 MA |
4337 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4338 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 4339 | dsl_dataset_t *ds = NULL; |
13fe0198 | 4340 | uint64_t newval; |
45d1cae3 | 4341 | |
13fe0198 | 4342 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 4343 | |
13fe0198 MA |
4344 | dsl_prop_set_sync_impl(ds, |
4345 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
4346 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
4347 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 4348 | |
13fe0198 MA |
4349 | VERIFY0(dsl_prop_get_int_ds(ds, |
4350 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 4351 | |
13fe0198 MA |
4352 | if (ds->ds_quota != newval) { |
4353 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
4354 | ds->ds_quota = newval; | |
45d1cae3 | 4355 | } |
13fe0198 | 4356 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
4357 | } |
4358 | ||
13fe0198 MA |
4359 | int |
4360 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
4361 | uint64_t refquota) | |
45d1cae3 | 4362 | { |
13fe0198 | 4363 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 4364 | |
13fe0198 MA |
4365 | ddsqra.ddsqra_name = dsname; |
4366 | ddsqra.ddsqra_source = source; | |
4367 | ddsqra.ddsqra_value = refquota; | |
4368 | ||
4369 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
d2734cce SD |
4370 | dsl_dataset_set_refquota_sync, &ddsqra, 0, |
4371 | ZFS_SPACE_CHECK_EXTRA_RESERVED)); | |
45d1cae3 BB |
4372 | } |
4373 | ||
4374 | static int | |
13fe0198 | 4375 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 4376 | { |
13fe0198 MA |
4377 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4378 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
4379 | dsl_dataset_t *ds; |
4380 | int error; | |
13fe0198 | 4381 | uint64_t newval, unique; |
428870ff | 4382 | |
13fe0198 | 4383 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 4384 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 4385 | |
13fe0198 MA |
4386 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
4387 | if (error != 0) | |
45d1cae3 | 4388 | return (error); |
45d1cae3 | 4389 | |
0c66c32d | 4390 | if (ds->ds_is_snapshot) { |
13fe0198 | 4391 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 4392 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
4393 | } |
4394 | ||
13fe0198 MA |
4395 | error = dsl_prop_predict(ds->ds_dir, |
4396 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
4397 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
4398 | if (error != 0) { | |
4399 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
4400 | return (error); |
4401 | } | |
4402 | ||
13fe0198 MA |
4403 | /* |
4404 | * If we are doing the preliminary check in open context, the | |
4405 | * space estimates may be inaccurate. | |
4406 | */ | |
4407 | if (!dmu_tx_is_syncing(tx)) { | |
4408 | dsl_dataset_rele(ds, FTAG); | |
4409 | return (0); | |
45d1cae3 | 4410 | } |
45d1cae3 | 4411 | |
13fe0198 MA |
4412 | mutex_enter(&ds->ds_lock); |
4413 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
4414 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 4415 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 4416 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 4417 | |
13fe0198 MA |
4418 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
4419 | uint64_t delta = MAX(unique, newval) - | |
4420 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 4421 | |
13fe0198 MA |
4422 | if (delta > |
4423 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
4424 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
4425 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 4426 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 4427 | } |
45d1cae3 BB |
4428 | } |
4429 | ||
13fe0198 MA |
4430 | dsl_dataset_rele(ds, FTAG); |
4431 | return (0); | |
45d1cae3 BB |
4432 | } |
4433 | ||
13fe0198 MA |
4434 | void |
4435 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
4436 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 4437 | { |
13fe0198 MA |
4438 | uint64_t newval; |
4439 | uint64_t unique; | |
4440 | int64_t delta; | |
428870ff | 4441 | |
13fe0198 MA |
4442 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
4443 | source, sizeof (value), 1, &value, tx); | |
428870ff | 4444 | |
13fe0198 MA |
4445 | VERIFY0(dsl_prop_get_int_ds(ds, |
4446 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 4447 | |
13fe0198 MA |
4448 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
4449 | mutex_enter(&ds->ds_dir->dd_lock); | |
4450 | mutex_enter(&ds->ds_lock); | |
4451 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 4452 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
4453 | delta = MAX(0, (int64_t)(newval - unique)) - |
4454 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
4455 | ds->ds_reserved = newval; | |
4456 | mutex_exit(&ds->ds_lock); | |
572e2857 | 4457 | |
13fe0198 MA |
4458 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
4459 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
4460 | } |
4461 | ||
13fe0198 MA |
4462 | static void |
4463 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 4464 | { |
13fe0198 MA |
4465 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4466 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 4467 | dsl_dataset_t *ds = NULL; |
45d1cae3 | 4468 | |
13fe0198 MA |
4469 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
4470 | dsl_dataset_set_refreservation_sync_impl(ds, | |
4471 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 4472 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 4473 | } |
428870ff | 4474 | |
428870ff | 4475 | int |
13fe0198 MA |
4476 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
4477 | uint64_t refreservation) | |
428870ff | 4478 | { |
13fe0198 | 4479 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 4480 | |
13fe0198 MA |
4481 | ddsqra.ddsqra_name = dsname; |
4482 | ddsqra.ddsqra_source = source; | |
4483 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 4484 | |
13fe0198 | 4485 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
d2734cce SD |
4486 | dsl_dataset_set_refreservation_sync, &ddsqra, 0, |
4487 | ZFS_SPACE_CHECK_EXTRA_RESERVED)); | |
13fe0198 | 4488 | } |
330d06f9 MA |
4489 | |
4490 | /* | |
30af21b0 PD |
4491 | * Return (in *usedp) the amount of space referenced by "new" that was not |
4492 | * referenced at the time the bookmark corresponds to. "New" may be a | |
4493 | * snapshot or a head. The bookmark must be before new, in | |
4494 | * new's filesystem (or its origin) -- caller verifies this. | |
330d06f9 MA |
4495 | * |
4496 | * The written space is calculated by considering two components: First, we | |
4497 | * ignore any freed space, and calculate the written as new's used space | |
4498 | * minus old's used space. Next, we add in the amount of space that was freed | |
30af21b0 PD |
4499 | * between the two time points, thus reducing new's used space relative to |
4500 | * old's. Specifically, this is the space that was born before | |
4501 | * zbm_creation_txg, and freed before new (ie. on new's deadlist or a | |
4502 | * previous deadlist). | |
330d06f9 MA |
4503 | * |
4504 | * space freed [---------------------] | |
4505 | * snapshots ---O-------O--------O-------O------ | |
30af21b0 PD |
4506 | * bookmark new |
4507 | * | |
4508 | * Note, the bookmark's zbm_*_bytes_refd must be valid, but if the HAS_FBN | |
4509 | * flag is not set, we will calculate the freed_before_next based on the | |
4510 | * next snapshot's deadlist, rather than using zbm_*_freed_before_next_snap. | |
330d06f9 | 4511 | */ |
30af21b0 PD |
4512 | static int |
4513 | dsl_dataset_space_written_impl(zfs_bookmark_phys_t *bmp, | |
4514 | dsl_dataset_t *new, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
330d06f9 MA |
4515 | { |
4516 | int err = 0; | |
330d06f9 MA |
4517 | dsl_pool_t *dp = new->ds_dir->dd_pool; |
4518 | ||
13fe0198 | 4519 | ASSERT(dsl_pool_config_held(dp)); |
30af21b0 PD |
4520 | if (dsl_dataset_is_snapshot(new)) { |
4521 | ASSERT3U(bmp->zbm_creation_txg, <, | |
4522 | dsl_dataset_phys(new)->ds_creation_txg); | |
4523 | } | |
13fe0198 | 4524 | |
330d06f9 | 4525 | *usedp = 0; |
d683ddbb | 4526 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
30af21b0 | 4527 | *usedp -= bmp->zbm_referenced_bytes_refd; |
330d06f9 MA |
4528 | |
4529 | *compp = 0; | |
d683ddbb | 4530 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
30af21b0 | 4531 | *compp -= bmp->zbm_compressed_bytes_refd; |
330d06f9 MA |
4532 | |
4533 | *uncompp = 0; | |
d683ddbb | 4534 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
30af21b0 | 4535 | *uncompp -= bmp->zbm_uncompressed_bytes_refd; |
330d06f9 | 4536 | |
30af21b0 | 4537 | dsl_dataset_t *snap = new; |
330d06f9 | 4538 | |
30af21b0 PD |
4539 | while (dsl_dataset_phys(snap)->ds_prev_snap_txg > |
4540 | bmp->zbm_creation_txg) { | |
4541 | uint64_t used, comp, uncomp; | |
330d06f9 | 4542 | |
30af21b0 PD |
4543 | dsl_deadlist_space_range(&snap->ds_deadlist, |
4544 | 0, bmp->zbm_creation_txg, | |
4545 | &used, &comp, &uncomp); | |
330d06f9 MA |
4546 | *usedp += used; |
4547 | *compp += comp; | |
4548 | *uncompp += uncomp; | |
4549 | ||
30af21b0 | 4550 | uint64_t snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
4551 | if (snap != new) |
4552 | dsl_dataset_rele(snap, FTAG); | |
30af21b0 PD |
4553 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); |
4554 | if (err != 0) | |
330d06f9 | 4555 | break; |
30af21b0 | 4556 | } |
330d06f9 | 4557 | |
30af21b0 PD |
4558 | /* |
4559 | * We might not have the FBN if we are calculating written from | |
4560 | * a snapshot (because we didn't know the correct "next" snapshot | |
4561 | * until now). | |
4562 | */ | |
4563 | if (bmp->zbm_flags & ZBM_FLAG_HAS_FBN) { | |
4564 | *usedp += bmp->zbm_referenced_freed_before_next_snap; | |
4565 | *compp += bmp->zbm_compressed_freed_before_next_snap; | |
4566 | *uncompp += bmp->zbm_uncompressed_freed_before_next_snap; | |
4567 | } else { | |
4568 | ASSERT3U(dsl_dataset_phys(snap)->ds_prev_snap_txg, ==, | |
4569 | bmp->zbm_creation_txg); | |
4570 | uint64_t used, comp, uncomp; | |
4571 | dsl_deadlist_space(&snap->ds_deadlist, &used, &comp, &uncomp); | |
4572 | *usedp += used; | |
4573 | *compp += comp; | |
4574 | *uncompp += uncomp; | |
330d06f9 | 4575 | } |
30af21b0 PD |
4576 | if (snap != new) |
4577 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 MA |
4578 | return (err); |
4579 | } | |
4580 | ||
30af21b0 PD |
4581 | /* |
4582 | * Return (in *usedp) the amount of space written in new that was not | |
4583 | * present at the time the bookmark corresponds to. New may be a | |
4584 | * snapshot or the head. Old must be a bookmark before new, in | |
4585 | * new's filesystem (or its origin) -- caller verifies this. | |
4586 | */ | |
4587 | int | |
4588 | dsl_dataset_space_written_bookmark(zfs_bookmark_phys_t *bmp, | |
4589 | dsl_dataset_t *new, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
4590 | { | |
4591 | if (!(bmp->zbm_flags & ZBM_FLAG_HAS_FBN)) | |
4592 | return (SET_ERROR(ENOTSUP)); | |
4593 | return (dsl_dataset_space_written_impl(bmp, new, | |
4594 | usedp, compp, uncompp)); | |
4595 | } | |
4596 | ||
4597 | /* | |
4598 | * Return (in *usedp) the amount of space written in new that is not | |
4599 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
4600 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
4601 | * fail and return EINVAL. | |
4602 | */ | |
4603 | int | |
4604 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
4605 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
4606 | { | |
4607 | if (!dsl_dataset_is_before(new, oldsnap, 0)) | |
4608 | return (SET_ERROR(EINVAL)); | |
4609 | ||
4610 | zfs_bookmark_phys_t zbm = { 0 }; | |
4611 | dsl_dataset_phys_t *dsp = dsl_dataset_phys(oldsnap); | |
4612 | zbm.zbm_guid = dsp->ds_guid; | |
4613 | zbm.zbm_creation_txg = dsp->ds_creation_txg; | |
4614 | zbm.zbm_creation_time = dsp->ds_creation_time; | |
4615 | zbm.zbm_referenced_bytes_refd = dsp->ds_referenced_bytes; | |
4616 | zbm.zbm_compressed_bytes_refd = dsp->ds_compressed_bytes; | |
4617 | zbm.zbm_uncompressed_bytes_refd = dsp->ds_uncompressed_bytes; | |
4618 | ||
4619 | /* | |
4620 | * If oldsnap is the origin (or origin's origin, ...) of new, | |
4621 | * we can't easily calculate the effective FBN. Therefore, | |
4622 | * we do not set ZBM_FLAG_HAS_FBN, so that the _impl will calculate | |
4623 | * it relative to the correct "next": the next snapshot towards "new", | |
4624 | * rather than the next snapshot in oldsnap's dsl_dir. | |
4625 | */ | |
4626 | return (dsl_dataset_space_written_impl(&zbm, new, | |
4627 | usedp, compp, uncompp)); | |
4628 | } | |
4629 | ||
330d06f9 MA |
4630 | /* |
4631 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
4632 | * lastsnap, and all snapshots in between are deleted. | |
4633 | * | |
4634 | * blocks that would be freed [---------------------------] | |
4635 | * snapshots ---O-------O--------O-------O--------O | |
4636 | * firstsnap lastsnap | |
4637 | * | |
4638 | * This is the set of blocks that were born after the snap before firstsnap, | |
4639 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
4640 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
4641 | * We calculate this by iterating over the relevant deadlists (from the snap | |
4642 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
4643 | * space on the deadlist that was born after the snap before firstsnap. | |
4644 | */ | |
4645 | int | |
4646 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
4647 | dsl_dataset_t *lastsnap, | |
4648 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
4649 | { | |
4650 | int err = 0; | |
4651 | uint64_t snapobj; | |
4652 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
4653 | ||
0c66c32d JG |
4654 | ASSERT(firstsnap->ds_is_snapshot); |
4655 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
4656 | |
4657 | /* | |
4658 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
4659 | * is before lastsnap. | |
4660 | */ | |
4661 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
4662 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
4663 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 4664 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
4665 | |
4666 | *usedp = *compp = *uncompp = 0; | |
4667 | ||
d683ddbb | 4668 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
4669 | while (snapobj != firstsnap->ds_object) { |
4670 | dsl_dataset_t *ds; | |
4671 | uint64_t used, comp, uncomp; | |
4672 | ||
4673 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
4674 | if (err != 0) | |
4675 | break; | |
4676 | ||
4677 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 4678 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
4679 | &used, &comp, &uncomp); |
4680 | *usedp += used; | |
4681 | *compp += comp; | |
4682 | *uncompp += uncomp; | |
4683 | ||
d683ddbb | 4684 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
4685 | ASSERT3U(snapobj, !=, 0); |
4686 | dsl_dataset_rele(ds, FTAG); | |
4687 | } | |
330d06f9 MA |
4688 | return (err); |
4689 | } | |
4690 | ||
13fe0198 MA |
4691 | /* |
4692 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
4693 | * For example, they could both be snapshots of the same filesystem, and | |
4694 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
4695 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
4696 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
4697 | * |
4698 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
4699 | */ |
4700 | boolean_t | |
da536844 | 4701 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
e9aa730c | 4702 | uint64_t earlier_txg) |
13fe0198 MA |
4703 | { |
4704 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
4705 | int error; | |
4706 | boolean_t ret; | |
13fe0198 MA |
4707 | |
4708 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 4709 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
4710 | |
4711 | if (earlier_txg == 0) | |
d683ddbb | 4712 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 4713 | |
0c66c32d | 4714 | if (later->ds_is_snapshot && |
d683ddbb | 4715 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
4716 | return (B_FALSE); |
4717 | ||
4718 | if (later->ds_dir == earlier->ds_dir) | |
4719 | return (B_TRUE); | |
30af21b0 PD |
4720 | |
4721 | /* | |
4722 | * We check dd_origin_obj explicitly here rather than using | |
4723 | * dsl_dir_is_clone() so that we will return TRUE if "earlier" | |
4724 | * is $ORIGIN@$ORIGIN. dsl_dataset_space_written() depends on | |
4725 | * this behavior. | |
4726 | */ | |
4727 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == 0) | |
13fe0198 MA |
4728 | return (B_FALSE); |
4729 | ||
1c27024e | 4730 | dsl_dataset_t *origin; |
13fe0198 | 4731 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 4732 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
4733 | if (error != 0) |
4734 | return (B_FALSE); | |
30af21b0 PD |
4735 | if (dsl_dataset_phys(origin)->ds_creation_txg == earlier_txg && |
4736 | origin->ds_dir == earlier->ds_dir) { | |
4737 | dsl_dataset_rele(origin, FTAG); | |
4738 | return (B_TRUE); | |
4739 | } | |
da536844 | 4740 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
4741 | dsl_dataset_rele(origin, FTAG); |
4742 | return (ret); | |
4743 | } | |
4744 | ||
fa86b5db MA |
4745 | void |
4746 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4747 | { | |
4748 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
4749 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
4750 | } | |
4751 | ||
47dfff3b MA |
4752 | boolean_t |
4753 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
4754 | { | |
4755 | dmu_object_info_t doi; | |
4756 | ||
4757 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
4758 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
4759 | } | |
4760 | ||
4761 | boolean_t | |
4762 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
4763 | { | |
4764 | return (dsl_dataset_is_zapified(ds) && | |
4765 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
4766 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
4767 | } | |
4768 | ||
a1d477c2 MA |
4769 | uint64_t |
4770 | dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds) | |
4771 | { | |
4772 | uint64_t remap_deadlist_obj; | |
4773 | int err; | |
4774 | ||
4775 | if (!dsl_dataset_is_zapified(ds)) | |
4776 | return (0); | |
4777 | ||
4778 | err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, | |
4779 | DS_FIELD_REMAP_DEADLIST, sizeof (remap_deadlist_obj), 1, | |
4780 | &remap_deadlist_obj); | |
4781 | ||
4782 | if (err != 0) { | |
4783 | VERIFY3S(err, ==, ENOENT); | |
4784 | return (0); | |
4785 | } | |
4786 | ||
4787 | ASSERT(remap_deadlist_obj != 0); | |
4788 | return (remap_deadlist_obj); | |
4789 | } | |
4790 | ||
4791 | boolean_t | |
4792 | dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds) | |
4793 | { | |
4794 | EQUIV(dsl_deadlist_is_open(&ds->ds_remap_deadlist), | |
4795 | dsl_dataset_get_remap_deadlist_object(ds) != 0); | |
4796 | return (dsl_deadlist_is_open(&ds->ds_remap_deadlist)); | |
4797 | } | |
4798 | ||
4799 | static void | |
4800 | dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, uint64_t obj, | |
4801 | dmu_tx_t *tx) | |
4802 | { | |
4803 | ASSERT(obj != 0); | |
4804 | dsl_dataset_zapify(ds, tx); | |
4805 | VERIFY0(zap_add(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, | |
4806 | DS_FIELD_REMAP_DEADLIST, sizeof (obj), 1, &obj, tx)); | |
4807 | } | |
4808 | ||
4809 | static void | |
4810 | dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4811 | { | |
4812 | VERIFY0(zap_remove(ds->ds_dir->dd_pool->dp_meta_objset, | |
4813 | ds->ds_object, DS_FIELD_REMAP_DEADLIST, tx)); | |
4814 | } | |
4815 | ||
4816 | void | |
4817 | dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4818 | { | |
4819 | uint64_t remap_deadlist_object; | |
4820 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
4821 | ||
4822 | ASSERT(dmu_tx_is_syncing(tx)); | |
4823 | ASSERT(dsl_dataset_remap_deadlist_exists(ds)); | |
4824 | ||
4825 | remap_deadlist_object = ds->ds_remap_deadlist.dl_object; | |
4826 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
4827 | dsl_deadlist_free(spa_meta_objset(spa), remap_deadlist_object, tx); | |
4828 | dsl_dataset_unset_remap_deadlist_object(ds, tx); | |
4829 | spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
4830 | } | |
4831 | ||
4832 | void | |
4833 | dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4834 | { | |
4835 | uint64_t remap_deadlist_obj; | |
4836 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
4837 | ||
4838 | ASSERT(dmu_tx_is_syncing(tx)); | |
4839 | ASSERT(MUTEX_HELD(&ds->ds_remap_deadlist_lock)); | |
4840 | /* | |
4841 | * Currently we only create remap deadlists when there are indirect | |
4842 | * vdevs with referenced mappings. | |
4843 | */ | |
4844 | ASSERT(spa_feature_is_active(spa, SPA_FEATURE_DEVICE_REMOVAL)); | |
4845 | ||
4846 | remap_deadlist_obj = dsl_deadlist_clone( | |
4847 | &ds->ds_deadlist, UINT64_MAX, | |
4848 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
4849 | dsl_dataset_set_remap_deadlist_object(ds, | |
4850 | remap_deadlist_obj, tx); | |
4851 | dsl_deadlist_open(&ds->ds_remap_deadlist, spa_meta_objset(spa), | |
4852 | remap_deadlist_obj); | |
4853 | spa_feature_incr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
4854 | } | |
4855 | ||
30af21b0 PD |
4856 | void |
4857 | dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps, | |
4858 | uint64_t num_redact_snaps, dmu_tx_t *tx) | |
4859 | { | |
4860 | uint64_t dsobj = ds->ds_object; | |
4861 | struct feature_type_uint64_array_arg *ftuaa = | |
4862 | kmem_zalloc(sizeof (*ftuaa), KM_SLEEP); | |
4863 | ftuaa->length = (int64_t)num_redact_snaps; | |
4864 | if (num_redact_snaps > 0) { | |
4865 | ftuaa->array = kmem_alloc(num_redact_snaps * sizeof (uint64_t), | |
4866 | KM_SLEEP); | |
4867 | bcopy(redact_snaps, ftuaa->array, num_redact_snaps * | |
4868 | sizeof (uint64_t)); | |
4869 | } | |
4870 | dsl_dataset_activate_feature(dsobj, SPA_FEATURE_REDACTED_DATASETS, | |
4871 | ftuaa, tx); | |
4872 | ds->ds_feature[SPA_FEATURE_REDACTED_DATASETS] = ftuaa; | |
4873 | } | |
4874 | ||
03fdcb9a | 4875 | /* BEGIN CSTYLED */ |
f1512ee6 | 4876 | #if defined(_LP64) |
03fdcb9a | 4877 | #define RECORDSIZE_PERM ZMOD_RW |
f1512ee6 MA |
4878 | #else |
4879 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
03fdcb9a | 4880 | #define RECORDSIZE_PERM ZMOD_RD |
f1512ee6 | 4881 | #endif |
03fdcb9a MM |
4882 | ZFS_MODULE_PARAM(zfs, zfs_, max_recordsize, INT, RECORDSIZE_PERM, |
4883 | "Max allowed record size"); | |
f1512ee6 | 4884 | |
03fdcb9a | 4885 | ZFS_MODULE_PARAM(zfs, zfs_, allow_redacted_dataset_mount, INT, ZMOD_RW, |
30af21b0 | 4886 | "Allow mounting of redacted datasets"); |
03fdcb9a | 4887 | /* END CSTYLED */ |
30af21b0 | 4888 | |
c28b2279 | 4889 | EXPORT_SYMBOL(dsl_dataset_hold); |
b5256303 | 4890 | EXPORT_SYMBOL(dsl_dataset_hold_flags); |
c28b2279 | 4891 | EXPORT_SYMBOL(dsl_dataset_hold_obj); |
b5256303 | 4892 | EXPORT_SYMBOL(dsl_dataset_hold_obj_flags); |
c28b2279 BB |
4893 | EXPORT_SYMBOL(dsl_dataset_own); |
4894 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
4895 | EXPORT_SYMBOL(dsl_dataset_name); | |
4896 | EXPORT_SYMBOL(dsl_dataset_rele); | |
b5256303 | 4897 | EXPORT_SYMBOL(dsl_dataset_rele_flags); |
c28b2279 | 4898 | EXPORT_SYMBOL(dsl_dataset_disown); |
c28b2279 | 4899 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
4900 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
4901 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
4902 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
4903 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 4904 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
4905 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
4906 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
4907 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
4908 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
c28b2279 | 4909 | EXPORT_SYMBOL(dsl_dataset_get_spa); |
19580676 | 4910 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
4911 | EXPORT_SYMBOL(dsl_dataset_space_written); |
4912 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
4913 | EXPORT_SYMBOL(dsl_dataset_sync); |
4914 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
4915 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
c28b2279 BB |
4916 | EXPORT_SYMBOL(dsl_dataset_dirty); |
4917 | EXPORT_SYMBOL(dsl_dataset_stats); | |
4918 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
4919 | EXPORT_SYMBOL(dsl_dataset_space); | |
4920 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
4921 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
4922 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
4923 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
4924 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); |