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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> |
03916905 | 60 | #include <sys/dmu_recv.h> |
47dfff3b MA |
61 | #include <sys/zio_compress.h> |
62 | #include <zfs_fletcher.h> | |
3c67d83a | 63 | #include <sys/zio_checksum.h> |
34dc7c2f | 64 | |
f1512ee6 MA |
65 | /* |
66 | * The SPA supports block sizes up to 16MB. However, very large blocks | |
67 | * can have an impact on i/o latency (e.g. tying up a spinning disk for | |
68 | * ~300ms), and also potentially on the memory allocator. Therefore, | |
69 | * we do not allow the recordsize to be set larger than zfs_max_recordsize | |
70 | * (default 1MB). Larger blocks can be created by changing this tunable, | |
71 | * and pools with larger blocks can always be imported and used, regardless | |
72 | * of this setting. | |
73 | */ | |
74 | int zfs_max_recordsize = 1 * 1024 * 1024; | |
75 | ||
428870ff BB |
76 | #define SWITCH64(x, y) \ |
77 | { \ | |
78 | uint64_t __tmp = (x); \ | |
79 | (x) = (y); \ | |
80 | (y) = __tmp; \ | |
81 | } | |
82 | ||
34dc7c2f BB |
83 | #define DS_REF_MAX (1ULL << 62) |
84 | ||
d683ddbb | 85 | extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); |
d683ddbb | 86 | |
a1d477c2 MA |
87 | static void dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, |
88 | uint64_t obj, dmu_tx_t *tx); | |
89 | static void dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, | |
90 | dmu_tx_t *tx); | |
91 | ||
d52d80b7 PD |
92 | static void unload_zfeature(dsl_dataset_t *ds, spa_feature_t f); |
93 | ||
8c62a0d0 DM |
94 | extern int spa_asize_inflation; |
95 | ||
0efd9791 AG |
96 | static zil_header_t zero_zil; |
97 | ||
34dc7c2f | 98 | /* |
4e33ba4c | 99 | * Figure out how much of this delta should be propagated to the dsl_dir |
34dc7c2f BB |
100 | * layer. If there's a refreservation, that space has already been |
101 | * partially accounted for in our ancestors. | |
102 | */ | |
103 | static int64_t | |
104 | parent_delta(dsl_dataset_t *ds, int64_t delta) | |
105 | { | |
d683ddbb | 106 | dsl_dataset_phys_t *ds_phys; |
34dc7c2f BB |
107 | uint64_t old_bytes, new_bytes; |
108 | ||
109 | if (ds->ds_reserved == 0) | |
110 | return (delta); | |
111 | ||
d683ddbb JG |
112 | ds_phys = dsl_dataset_phys(ds); |
113 | old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); | |
114 | new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); | |
34dc7c2f BB |
115 | |
116 | ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); | |
117 | return (new_bytes - old_bytes); | |
118 | } | |
119 | ||
120 | void | |
428870ff | 121 | dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) |
34dc7c2f | 122 | { |
d6320ddb | 123 | int used, compressed, uncompressed; |
34dc7c2f BB |
124 | int64_t delta; |
125 | ||
d6320ddb BB |
126 | used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); |
127 | compressed = BP_GET_PSIZE(bp); | |
128 | uncompressed = BP_GET_UCSIZE(bp); | |
129 | ||
428870ff | 130 | dprintf_bp(bp, "ds=%p", ds); |
34dc7c2f BB |
131 | |
132 | ASSERT(dmu_tx_is_syncing(tx)); | |
133 | /* It could have been compressed away to nothing */ | |
134 | if (BP_IS_HOLE(bp)) | |
135 | return; | |
136 | ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
9ae529ec | 137 | ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); |
34dc7c2f | 138 | if (ds == NULL) { |
29809a6c MA |
139 | dsl_pool_mos_diduse_space(tx->tx_pool, |
140 | used, compressed, uncompressed); | |
34dc7c2f BB |
141 | return; |
142 | } | |
428870ff | 143 | |
0efd9791 | 144 | ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); |
a169a625 | 145 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
34dc7c2f BB |
146 | mutex_enter(&ds->ds_lock); |
147 | delta = parent_delta(ds, used); | |
d683ddbb JG |
148 | dsl_dataset_phys(ds)->ds_referenced_bytes += used; |
149 | dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; | |
150 | dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; | |
151 | dsl_dataset_phys(ds)->ds_unique_bytes += used; | |
3c67d83a | 152 | |
241b5415 | 153 | if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { |
d52d80b7 PD |
154 | ds->ds_feature_activation[SPA_FEATURE_LARGE_BLOCKS] = |
155 | (void *)B_TRUE; | |
241b5415 | 156 | } |
3c67d83a | 157 | |
1c27024e | 158 | spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); |
d52d80b7 PD |
159 | if (f != SPA_FEATURE_NONE) { |
160 | ASSERT3S(spa_feature_table[f].fi_type, ==, | |
161 | ZFEATURE_TYPE_BOOLEAN); | |
162 | ds->ds_feature_activation[f] = (void *)B_TRUE; | |
163 | } | |
3c67d83a | 164 | |
34dc7c2f | 165 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
166 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, |
167 | compressed, uncompressed, tx); | |
168 | dsl_dir_transfer_space(ds->ds_dir, used - delta, | |
169 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
170 | } |
171 | ||
a1d477c2 MA |
172 | /* |
173 | * Called when the specified segment has been remapped, and is thus no | |
174 | * longer referenced in the head dataset. The vdev must be indirect. | |
175 | * | |
176 | * If the segment is referenced by a snapshot, put it on the remap deadlist. | |
177 | * Otherwise, add this segment to the obsolete spacemap. | |
178 | */ | |
179 | void | |
180 | dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, uint64_t offset, | |
181 | uint64_t size, uint64_t birth, dmu_tx_t *tx) | |
182 | { | |
183 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
184 | ||
185 | ASSERT(dmu_tx_is_syncing(tx)); | |
186 | ASSERT(birth <= tx->tx_txg); | |
187 | ASSERT(!ds->ds_is_snapshot); | |
188 | ||
189 | if (birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { | |
190 | spa_vdev_indirect_mark_obsolete(spa, vdev, offset, size, tx); | |
191 | } else { | |
192 | blkptr_t fakebp; | |
193 | dva_t *dva = &fakebp.blk_dva[0]; | |
194 | ||
195 | ASSERT(ds != NULL); | |
196 | ||
197 | mutex_enter(&ds->ds_remap_deadlist_lock); | |
198 | if (!dsl_dataset_remap_deadlist_exists(ds)) { | |
199 | dsl_dataset_create_remap_deadlist(ds, tx); | |
200 | } | |
201 | mutex_exit(&ds->ds_remap_deadlist_lock); | |
202 | ||
203 | BP_ZERO(&fakebp); | |
204 | fakebp.blk_birth = birth; | |
205 | DVA_SET_VDEV(dva, vdev); | |
206 | DVA_SET_OFFSET(dva, offset); | |
207 | DVA_SET_ASIZE(dva, size); | |
208 | ||
209 | dsl_deadlist_insert(&ds->ds_remap_deadlist, &fakebp, tx); | |
210 | } | |
211 | } | |
212 | ||
b128c09f | 213 | int |
428870ff BB |
214 | dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, |
215 | boolean_t async) | |
34dc7c2f | 216 | { |
d2734cce SD |
217 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
218 | ||
219 | int used = bp_get_dsize_sync(spa, bp); | |
b0bc7a84 MG |
220 | int compressed = BP_GET_PSIZE(bp); |
221 | int uncompressed = BP_GET_UCSIZE(bp); | |
d6320ddb | 222 | |
34dc7c2f | 223 | if (BP_IS_HOLE(bp)) |
b128c09f | 224 | return (0); |
34dc7c2f | 225 | |
428870ff BB |
226 | ASSERT(dmu_tx_is_syncing(tx)); |
227 | ASSERT(bp->blk_birth <= tx->tx_txg); | |
228 | ||
34dc7c2f | 229 | if (ds == NULL) { |
428870ff | 230 | dsl_free(tx->tx_pool, tx->tx_txg, bp); |
29809a6c MA |
231 | dsl_pool_mos_diduse_space(tx->tx_pool, |
232 | -used, -compressed, -uncompressed); | |
b128c09f | 233 | return (used); |
34dc7c2f BB |
234 | } |
235 | ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
236 | ||
0c66c32d | 237 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f BB |
238 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
239 | ||
d683ddbb | 240 | if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
34dc7c2f BB |
241 | int64_t delta; |
242 | ||
428870ff BB |
243 | dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); |
244 | dsl_free(tx->tx_pool, tx->tx_txg, bp); | |
34dc7c2f BB |
245 | |
246 | mutex_enter(&ds->ds_lock); | |
d683ddbb | 247 | ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || |
34dc7c2f BB |
248 | !DS_UNIQUE_IS_ACCURATE(ds)); |
249 | delta = parent_delta(ds, -used); | |
d683ddbb | 250 | dsl_dataset_phys(ds)->ds_unique_bytes -= used; |
34dc7c2f | 251 | mutex_exit(&ds->ds_lock); |
b128c09f | 252 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
34dc7c2f | 253 | delta, -compressed, -uncompressed, tx); |
b128c09f BB |
254 | dsl_dir_transfer_space(ds->ds_dir, -used - delta, |
255 | DD_USED_REFRSRV, DD_USED_HEAD, tx); | |
34dc7c2f BB |
256 | } else { |
257 | dprintf_bp(bp, "putting on dead list: %s", ""); | |
428870ff BB |
258 | if (async) { |
259 | /* | |
260 | * We are here as part of zio's write done callback, | |
261 | * which means we're a zio interrupt thread. We can't | |
262 | * call dsl_deadlist_insert() now because it may block | |
263 | * waiting for I/O. Instead, put bp on the deferred | |
264 | * queue and let dsl_pool_sync() finish the job. | |
265 | */ | |
266 | bplist_append(&ds->ds_pending_deadlist, bp); | |
267 | } else { | |
268 | dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); | |
269 | } | |
34dc7c2f | 270 | ASSERT3U(ds->ds_prev->ds_object, ==, |
d683ddbb JG |
271 | dsl_dataset_phys(ds)->ds_prev_snap_obj); |
272 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); | |
34dc7c2f | 273 | /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
d683ddbb | 274 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == |
34dc7c2f | 275 | ds->ds_object && bp->blk_birth > |
d683ddbb | 276 | dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { |
34dc7c2f BB |
277 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
278 | mutex_enter(&ds->ds_prev->ds_lock); | |
d683ddbb | 279 | dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; |
34dc7c2f BB |
280 | mutex_exit(&ds->ds_prev->ds_lock); |
281 | } | |
428870ff | 282 | if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { |
b128c09f BB |
283 | dsl_dir_transfer_space(ds->ds_dir, used, |
284 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
285 | } | |
34dc7c2f BB |
286 | } |
287 | mutex_enter(&ds->ds_lock); | |
d683ddbb JG |
288 | ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); |
289 | dsl_dataset_phys(ds)->ds_referenced_bytes -= used; | |
290 | ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); | |
291 | dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; | |
292 | ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); | |
293 | dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; | |
34dc7c2f | 294 | mutex_exit(&ds->ds_lock); |
b128c09f BB |
295 | |
296 | return (used); | |
34dc7c2f BB |
297 | } |
298 | ||
d52d80b7 PD |
299 | struct feature_type_uint64_array_arg { |
300 | uint64_t length; | |
301 | uint64_t *array; | |
302 | }; | |
303 | ||
304 | static void | |
305 | unload_zfeature(dsl_dataset_t *ds, spa_feature_t f) | |
306 | { | |
307 | switch (spa_feature_table[f].fi_type) { | |
308 | case ZFEATURE_TYPE_BOOLEAN: | |
309 | break; | |
310 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
311 | { | |
312 | struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f]; | |
313 | kmem_free(ftuaa->array, ftuaa->length * sizeof (uint64_t)); | |
314 | kmem_free(ftuaa, sizeof (*ftuaa)); | |
315 | break; | |
316 | } | |
317 | default: | |
318 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
319 | } | |
320 | } | |
321 | ||
322 | static int | |
323 | load_zfeature(objset_t *mos, dsl_dataset_t *ds, spa_feature_t f) | |
324 | { | |
325 | int err = 0; | |
326 | switch (spa_feature_table[f].fi_type) { | |
327 | case ZFEATURE_TYPE_BOOLEAN: | |
328 | err = zap_contains(mos, ds->ds_object, | |
329 | spa_feature_table[f].fi_guid); | |
330 | if (err == 0) { | |
331 | ds->ds_feature[f] = (void *)B_TRUE; | |
332 | } else { | |
333 | ASSERT3U(err, ==, ENOENT); | |
334 | err = 0; | |
335 | } | |
336 | break; | |
337 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
338 | { | |
339 | uint64_t int_size, num_int; | |
340 | uint64_t *data; | |
341 | err = zap_length(mos, ds->ds_object, | |
342 | spa_feature_table[f].fi_guid, &int_size, &num_int); | |
343 | if (err != 0) { | |
344 | ASSERT3U(err, ==, ENOENT); | |
345 | err = 0; | |
346 | break; | |
347 | } | |
348 | ASSERT3U(int_size, ==, sizeof (uint64_t)); | |
349 | data = kmem_alloc(int_size * num_int, KM_SLEEP); | |
350 | VERIFY0(zap_lookup(mos, ds->ds_object, | |
351 | spa_feature_table[f].fi_guid, int_size, num_int, data)); | |
352 | struct feature_type_uint64_array_arg *ftuaa = | |
353 | kmem_alloc(sizeof (*ftuaa), KM_SLEEP); | |
354 | ftuaa->length = num_int; | |
355 | ftuaa->array = data; | |
356 | ds->ds_feature[f] = ftuaa; | |
357 | break; | |
358 | } | |
359 | default: | |
360 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
361 | } | |
362 | return (err); | |
363 | } | |
364 | ||
39efbde7 GM |
365 | /* |
366 | * We have to release the fsid syncronously or we risk that a subsequent | |
367 | * mount of the same dataset will fail to unique_insert the fsid. This | |
368 | * failure would manifest itself as the fsid of this dataset changing | |
369 | * between mounts which makes NFS clients quite unhappy. | |
370 | */ | |
34dc7c2f | 371 | static void |
39efbde7 | 372 | dsl_dataset_evict_sync(void *dbu) |
34dc7c2f | 373 | { |
0c66c32d | 374 | dsl_dataset_t *ds = dbu; |
34dc7c2f | 375 | |
13fe0198 | 376 | ASSERT(ds->ds_owner == NULL); |
34dc7c2f | 377 | |
34dc7c2f | 378 | unique_remove(ds->ds_fsid_guid); |
39efbde7 GM |
379 | } |
380 | ||
381 | static void | |
382 | dsl_dataset_evict_async(void *dbu) | |
383 | { | |
384 | dsl_dataset_t *ds = dbu; | |
385 | ||
386 | ASSERT(ds->ds_owner == NULL); | |
387 | ||
388 | ds->ds_dbuf = NULL; | |
34dc7c2f | 389 | |
428870ff BB |
390 | if (ds->ds_objset != NULL) |
391 | dmu_objset_evict(ds->ds_objset); | |
34dc7c2f BB |
392 | |
393 | if (ds->ds_prev) { | |
13fe0198 | 394 | dsl_dataset_rele(ds->ds_prev, ds); |
34dc7c2f BB |
395 | ds->ds_prev = NULL; |
396 | } | |
397 | ||
428870ff | 398 | bplist_destroy(&ds->ds_pending_deadlist); |
a1d477c2 | 399 | if (dsl_deadlist_is_open(&ds->ds_deadlist)) |
428870ff | 400 | dsl_deadlist_close(&ds->ds_deadlist); |
a1d477c2 MA |
401 | if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) |
402 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
b128c09f | 403 | if (ds->ds_dir) |
0c66c32d | 404 | dsl_dir_async_rele(ds->ds_dir, ds); |
34dc7c2f BB |
405 | |
406 | ASSERT(!list_link_active(&ds->ds_synced_link)); | |
407 | ||
d52d80b7 PD |
408 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
409 | if (dsl_dataset_feature_is_active(ds, f)) | |
410 | unload_zfeature(ds, f); | |
411 | } | |
412 | ||
0eb21616 | 413 | list_destroy(&ds->ds_prop_cbs); |
34dc7c2f BB |
414 | mutex_destroy(&ds->ds_lock); |
415 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 416 | mutex_destroy(&ds->ds_sendstream_lock); |
a1d477c2 | 417 | mutex_destroy(&ds->ds_remap_deadlist_lock); |
424fd7c3 | 418 | zfs_refcount_destroy(&ds->ds_longholds); |
cc9bb3e5 | 419 | rrw_destroy(&ds->ds_bp_rwlock); |
34dc7c2f BB |
420 | |
421 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
422 | } | |
423 | ||
13fe0198 | 424 | int |
34dc7c2f BB |
425 | dsl_dataset_get_snapname(dsl_dataset_t *ds) |
426 | { | |
427 | dsl_dataset_phys_t *headphys; | |
428 | int err; | |
429 | dmu_buf_t *headdbuf; | |
430 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
431 | objset_t *mos = dp->dp_meta_objset; | |
432 | ||
433 | if (ds->ds_snapname[0]) | |
434 | return (0); | |
d683ddbb | 435 | if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) |
34dc7c2f BB |
436 | return (0); |
437 | ||
d683ddbb | 438 | err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, |
34dc7c2f | 439 | FTAG, &headdbuf); |
13fe0198 | 440 | if (err != 0) |
34dc7c2f BB |
441 | return (err); |
442 | headphys = headdbuf->db_data; | |
443 | err = zap_value_search(dp->dp_meta_objset, | |
444 | headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); | |
d439f63f TC |
445 | if (err != 0 && zfs_recover == B_TRUE) { |
446 | err = 0; | |
447 | (void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname), | |
448 | "SNAPOBJ=%llu-ERR=%d", | |
449 | (unsigned long long)ds->ds_object, err); | |
450 | } | |
34dc7c2f BB |
451 | dmu_buf_rele(headdbuf, FTAG); |
452 | return (err); | |
453 | } | |
454 | ||
6772fb67 | 455 | int |
b128c09f | 456 | dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
34dc7c2f | 457 | { |
b128c09f | 458 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 459 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 460 | matchtype_t mt = 0; |
34dc7c2f BB |
461 | int err; |
462 | ||
d683ddbb | 463 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 464 | mt = MT_NORMALIZE; |
34dc7c2f | 465 | |
b128c09f | 466 | err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
34dc7c2f | 467 | value, mt, NULL, 0, NULL); |
9b7b9cd3 | 468 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 469 | err = zap_lookup(mos, snapobj, name, 8, 1, value); |
34dc7c2f BB |
470 | return (err); |
471 | } | |
472 | ||
13fe0198 | 473 | int |
788eb90c JJ |
474 | dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, |
475 | boolean_t adj_cnt) | |
34dc7c2f | 476 | { |
b128c09f | 477 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
d683ddbb | 478 | uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; |
9b7b9cd3 | 479 | matchtype_t mt = 0; |
34dc7c2f BB |
480 | int err; |
481 | ||
428870ff BB |
482 | dsl_dir_snap_cmtime_update(ds->ds_dir); |
483 | ||
d683ddbb | 484 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) |
9b7b9cd3 | 485 | mt = MT_NORMALIZE; |
34dc7c2f | 486 | |
b128c09f | 487 | err = zap_remove_norm(mos, snapobj, name, mt, tx); |
9b7b9cd3 | 488 | if (err == ENOTSUP && (mt & MT_NORMALIZE)) |
b128c09f | 489 | err = zap_remove(mos, snapobj, name, tx); |
788eb90c JJ |
490 | |
491 | if (err == 0 && adj_cnt) | |
492 | dsl_fs_ss_count_adjust(ds->ds_dir, -1, | |
493 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
494 | ||
34dc7c2f BB |
495 | return (err); |
496 | } | |
497 | ||
6ebebace JG |
498 | boolean_t |
499 | dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) | |
500 | { | |
6186e297 JG |
501 | dmu_buf_t *dbuf = ds->ds_dbuf; |
502 | boolean_t result = B_FALSE; | |
503 | ||
504 | if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, | |
505 | ds->ds_object, DMU_BONUS_BLKID, tag)) { | |
506 | ||
507 | if (ds == dmu_buf_get_user(dbuf)) | |
508 | result = B_TRUE; | |
509 | else | |
510 | dmu_buf_rele(dbuf, tag); | |
511 | } | |
512 | ||
513 | return (result); | |
6ebebace JG |
514 | } |
515 | ||
13fe0198 | 516 | int |
52ce99dd TC |
517 | dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
518 | dsl_dataset_t **dsp) | |
34dc7c2f | 519 | { |
34dc7c2f BB |
520 | objset_t *mos = dp->dp_meta_objset; |
521 | dmu_buf_t *dbuf; | |
522 | dsl_dataset_t *ds; | |
523 | int err; | |
572e2857 | 524 | dmu_object_info_t doi; |
34dc7c2f | 525 | |
13fe0198 | 526 | ASSERT(dsl_pool_config_held(dp)); |
34dc7c2f BB |
527 | |
528 | err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); | |
13fe0198 | 529 | if (err != 0) |
34dc7c2f | 530 | return (err); |
572e2857 BB |
531 | |
532 | /* Make sure dsobj has the correct object type. */ | |
533 | dmu_object_info_from_db(dbuf, &doi); | |
fa86b5db | 534 | if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { |
3a84951d | 535 | dmu_buf_rele(dbuf, tag); |
2e528b49 | 536 | return (SET_ERROR(EINVAL)); |
3a84951d | 537 | } |
572e2857 | 538 | |
34dc7c2f BB |
539 | ds = dmu_buf_get_user(dbuf); |
540 | if (ds == NULL) { | |
d4ed6673 | 541 | dsl_dataset_t *winner = NULL; |
34dc7c2f | 542 | |
79c76d5b | 543 | ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); |
34dc7c2f BB |
544 | ds->ds_dbuf = dbuf; |
545 | ds->ds_object = dsobj; | |
0c66c32d | 546 | ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; |
98f72a53 | 547 | list_link_init(&ds->ds_synced_link); |
34dc7c2f | 548 | |
a1d477c2 MA |
549 | err = dsl_dir_hold_obj(dp, dsl_dataset_phys(ds)->ds_dir_obj, |
550 | NULL, ds, &ds->ds_dir); | |
551 | if (err != 0) { | |
552 | kmem_free(ds, sizeof (dsl_dataset_t)); | |
553 | dmu_buf_rele(dbuf, tag); | |
554 | return (err); | |
555 | } | |
556 | ||
34dc7c2f BB |
557 | mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
558 | mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); | |
37abac6d | 559 | mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); |
a1d477c2 MA |
560 | mutex_init(&ds->ds_remap_deadlist_lock, |
561 | NULL, MUTEX_DEFAULT, NULL); | |
cc9bb3e5 | 562 | rrw_init(&ds->ds_bp_rwlock, B_FALSE); |
424fd7c3 | 563 | zfs_refcount_create(&ds->ds_longholds); |
34dc7c2f | 564 | |
428870ff | 565 | bplist_create(&ds->ds_pending_deadlist); |
428870ff | 566 | |
37abac6d BP |
567 | list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), |
568 | offsetof(dmu_sendarg_t, dsa_link)); | |
569 | ||
0eb21616 JG |
570 | list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), |
571 | offsetof(dsl_prop_cb_record_t, cbr_ds_node)); | |
572 | ||
f1512ee6 | 573 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
241b5415 MA |
574 | spa_feature_t f; |
575 | ||
576 | for (f = 0; f < SPA_FEATURES; f++) { | |
577 | if (!(spa_feature_table[f].fi_flags & | |
578 | ZFEATURE_FLAG_PER_DATASET)) | |
579 | continue; | |
d52d80b7 | 580 | err = load_zfeature(mos, ds, f); |
19b3b1d2 | 581 | } |
f1512ee6 MA |
582 | } |
583 | ||
0c66c32d | 584 | if (!ds->ds_is_snapshot) { |
34dc7c2f | 585 | ds->ds_snapname[0] = '\0'; |
d683ddbb | 586 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 | 587 | err = dsl_dataset_hold_obj(dp, |
d683ddbb | 588 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
b128c09f | 589 | ds, &ds->ds_prev); |
34dc7c2f | 590 | } |
da536844 MA |
591 | if (doi.doi_type == DMU_OTN_ZAP_METADATA) { |
592 | int zaperr = zap_lookup(mos, ds->ds_object, | |
593 | DS_FIELD_BOOKMARK_NAMES, | |
594 | sizeof (ds->ds_bookmarks), 1, | |
595 | &ds->ds_bookmarks); | |
596 | if (zaperr != ENOENT) | |
597 | VERIFY0(zaperr); | |
598 | } | |
45d1cae3 BB |
599 | } else { |
600 | if (zfs_flags & ZFS_DEBUG_SNAPNAMES) | |
601 | err = dsl_dataset_get_snapname(ds); | |
d683ddbb JG |
602 | if (err == 0 && |
603 | dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { | |
45d1cae3 BB |
604 | err = zap_count( |
605 | ds->ds_dir->dd_pool->dp_meta_objset, | |
d683ddbb | 606 | dsl_dataset_phys(ds)->ds_userrefs_obj, |
45d1cae3 BB |
607 | &ds->ds_userrefs); |
608 | } | |
34dc7c2f BB |
609 | } |
610 | ||
0c66c32d | 611 | if (err == 0 && !ds->ds_is_snapshot) { |
13fe0198 MA |
612 | err = dsl_prop_get_int_ds(ds, |
613 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
614 | &ds->ds_reserved); | |
34dc7c2f | 615 | if (err == 0) { |
13fe0198 MA |
616 | err = dsl_prop_get_int_ds(ds, |
617 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
618 | &ds->ds_quota); | |
34dc7c2f | 619 | } |
34dc7c2f BB |
620 | } else { |
621 | ds->ds_reserved = ds->ds_quota = 0; | |
622 | } | |
623 | ||
f00ab3f2 TC |
624 | if (err == 0 && ds->ds_dir->dd_crypto_obj != 0 && |
625 | ds->ds_is_snapshot && | |
626 | zap_contains(mos, dsobj, DS_FIELD_IVSET_GUID) != 0) { | |
627 | dp->dp_spa->spa_errata = | |
628 | ZPOOL_ERRATA_ZOL_8308_ENCRYPTION; | |
629 | } | |
630 | ||
a1d477c2 MA |
631 | dsl_deadlist_open(&ds->ds_deadlist, |
632 | mos, dsl_dataset_phys(ds)->ds_deadlist_obj); | |
633 | uint64_t remap_deadlist_obj = | |
634 | dsl_dataset_get_remap_deadlist_object(ds); | |
635 | if (remap_deadlist_obj != 0) { | |
636 | dsl_deadlist_open(&ds->ds_remap_deadlist, mos, | |
637 | remap_deadlist_obj); | |
638 | } | |
639 | ||
39efbde7 GM |
640 | dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync, |
641 | dsl_dataset_evict_async, &ds->ds_dbuf); | |
0c66c32d JG |
642 | if (err == 0) |
643 | winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); | |
644 | ||
645 | if (err != 0 || winner != NULL) { | |
428870ff BB |
646 | bplist_destroy(&ds->ds_pending_deadlist); |
647 | dsl_deadlist_close(&ds->ds_deadlist); | |
a1d477c2 MA |
648 | if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) |
649 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
b128c09f | 650 | if (ds->ds_prev) |
13fe0198 MA |
651 | dsl_dataset_rele(ds->ds_prev, ds); |
652 | dsl_dir_rele(ds->ds_dir, ds); | |
d10b2f1d JL |
653 | list_destroy(&ds->ds_prop_cbs); |
654 | list_destroy(&ds->ds_sendstreams); | |
34dc7c2f BB |
655 | mutex_destroy(&ds->ds_lock); |
656 | mutex_destroy(&ds->ds_opening_lock); | |
58c4aa00 | 657 | mutex_destroy(&ds->ds_sendstream_lock); |
d10b2f1d | 658 | mutex_destroy(&ds->ds_remap_deadlist_lock); |
424fd7c3 | 659 | zfs_refcount_destroy(&ds->ds_longholds); |
d10b2f1d | 660 | rrw_destroy(&ds->ds_bp_rwlock); |
34dc7c2f | 661 | kmem_free(ds, sizeof (dsl_dataset_t)); |
13fe0198 | 662 | if (err != 0) { |
34dc7c2f BB |
663 | dmu_buf_rele(dbuf, tag); |
664 | return (err); | |
665 | } | |
666 | ds = winner; | |
667 | } else { | |
668 | ds->ds_fsid_guid = | |
d683ddbb | 669 | unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); |
39efbde7 GM |
670 | if (ds->ds_fsid_guid != |
671 | dsl_dataset_phys(ds)->ds_fsid_guid) { | |
672 | zfs_dbgmsg("ds_fsid_guid changed from " | |
673 | "%llx to %llx for pool %s dataset id %llu", | |
674 | (long long) | |
675 | dsl_dataset_phys(ds)->ds_fsid_guid, | |
676 | (long long)ds->ds_fsid_guid, | |
677 | spa_name(dp->dp_spa), | |
678 | dsobj); | |
679 | } | |
34dc7c2f BB |
680 | } |
681 | } | |
52ce99dd | 682 | |
34dc7c2f | 683 | ASSERT3P(ds->ds_dbuf, ==, dbuf); |
d683ddbb JG |
684 | ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); |
685 | ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || | |
b128c09f BB |
686 | spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
687 | dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); | |
34dc7c2f | 688 | *dsp = ds; |
b5256303 | 689 | |
34dc7c2f BB |
690 | return (0); |
691 | } | |
692 | ||
b128c09f | 693 | int |
52ce99dd TC |
694 | dsl_dataset_create_key_mapping(dsl_dataset_t *ds) |
695 | { | |
696 | dsl_dir_t *dd = ds->ds_dir; | |
697 | ||
698 | if (dd->dd_crypto_obj == 0) | |
699 | return (0); | |
700 | ||
701 | return (spa_keystore_create_mapping(dd->dd_pool->dp_spa, | |
702 | ds, ds, &ds->ds_key_mapping)); | |
703 | } | |
704 | ||
705 | int | |
706 | dsl_dataset_hold_obj_flags(dsl_pool_t *dp, uint64_t dsobj, | |
707 | ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp) | |
b5256303 | 708 | { |
52ce99dd TC |
709 | int err; |
710 | ||
711 | err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); | |
712 | if (err != 0) | |
713 | return (err); | |
714 | ||
715 | ASSERT3P(*dsp, !=, NULL); | |
716 | ||
717 | if (flags & DS_HOLD_FLAG_DECRYPT) { | |
718 | err = dsl_dataset_create_key_mapping(*dsp); | |
719 | if (err != 0) | |
720 | dsl_dataset_rele(*dsp, tag); | |
721 | } | |
722 | ||
723 | return (err); | |
b5256303 TC |
724 | } |
725 | ||
726 | int | |
727 | dsl_dataset_hold_flags(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, | |
428870ff | 728 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f BB |
729 | { |
730 | dsl_dir_t *dd; | |
b128c09f | 731 | const char *snapname; |
34dc7c2f | 732 | uint64_t obj; |
34dc7c2f | 733 | int err = 0; |
fcff0f35 | 734 | dsl_dataset_t *ds; |
34dc7c2f | 735 | |
13fe0198 MA |
736 | err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); |
737 | if (err != 0) | |
34dc7c2f BB |
738 | return (err); |
739 | ||
13fe0198 | 740 | ASSERT(dsl_pool_config_held(dp)); |
d683ddbb | 741 | obj = dsl_dir_phys(dd)->dd_head_dataset_obj; |
13fe0198 | 742 | if (obj != 0) |
b5256303 | 743 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, &ds); |
b128c09f | 744 | else |
2e528b49 | 745 | err = SET_ERROR(ENOENT); |
34dc7c2f | 746 | |
b128c09f BB |
747 | /* we may be looking for a snapshot */ |
748 | if (err == 0 && snapname != NULL) { | |
fcff0f35 | 749 | dsl_dataset_t *snap_ds; |
34dc7c2f | 750 | |
b128c09f | 751 | if (*snapname++ != '@') { |
b5256303 | 752 | dsl_dataset_rele_flags(ds, flags, tag); |
13fe0198 | 753 | dsl_dir_rele(dd, FTAG); |
2e528b49 | 754 | return (SET_ERROR(ENOENT)); |
34dc7c2f | 755 | } |
34dc7c2f | 756 | |
b128c09f | 757 | dprintf("looking for snapshot '%s'\n", snapname); |
fcff0f35 | 758 | err = dsl_dataset_snap_lookup(ds, snapname, &obj); |
b5256303 TC |
759 | if (err == 0) { |
760 | err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, | |
761 | &snap_ds); | |
762 | } | |
763 | dsl_dataset_rele_flags(ds, flags, tag); | |
b128c09f | 764 | |
13fe0198 | 765 | if (err == 0) { |
fcff0f35 PD |
766 | mutex_enter(&snap_ds->ds_lock); |
767 | if (snap_ds->ds_snapname[0] == 0) | |
768 | (void) strlcpy(snap_ds->ds_snapname, snapname, | |
769 | sizeof (snap_ds->ds_snapname)); | |
770 | mutex_exit(&snap_ds->ds_lock); | |
771 | ds = snap_ds; | |
34dc7c2f | 772 | } |
34dc7c2f | 773 | } |
fcff0f35 PD |
774 | if (err == 0) |
775 | *dsp = ds; | |
13fe0198 | 776 | dsl_dir_rele(dd, FTAG); |
34dc7c2f BB |
777 | return (err); |
778 | } | |
779 | ||
780 | int | |
b5256303 TC |
781 | dsl_dataset_hold(dsl_pool_t *dp, const char *name, void *tag, |
782 | dsl_dataset_t **dsp) | |
783 | { | |
784 | return (dsl_dataset_hold_flags(dp, name, 0, tag, dsp)); | |
785 | } | |
786 | ||
787 | int | |
788 | dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags, | |
428870ff | 789 | void *tag, dsl_dataset_t **dsp) |
34dc7c2f | 790 | { |
b5256303 | 791 | int err = dsl_dataset_hold_obj_flags(dp, dsobj, flags, tag, dsp); |
13fe0198 MA |
792 | if (err != 0) |
793 | return (err); | |
794 | if (!dsl_dataset_tryown(*dsp, tag)) { | |
b5256303 | 795 | dsl_dataset_rele_flags(*dsp, flags, tag); |
13fe0198 | 796 | *dsp = NULL; |
2e528b49 | 797 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
798 | } |
799 | return (0); | |
800 | } | |
801 | ||
802 | int | |
b5256303 | 803 | dsl_dataset_own(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, |
13fe0198 MA |
804 | void *tag, dsl_dataset_t **dsp) |
805 | { | |
b5256303 | 806 | int err = dsl_dataset_hold_flags(dp, name, flags, tag, dsp); |
13fe0198 | 807 | if (err != 0) |
b128c09f | 808 | return (err); |
13fe0198 | 809 | if (!dsl_dataset_tryown(*dsp, tag)) { |
b5256303 | 810 | dsl_dataset_rele_flags(*dsp, flags, tag); |
2e528b49 | 811 | return (SET_ERROR(EBUSY)); |
b128c09f BB |
812 | } |
813 | return (0); | |
34dc7c2f BB |
814 | } |
815 | ||
13fe0198 MA |
816 | /* |
817 | * See the comment above dsl_pool_hold() for details. In summary, a long | |
818 | * hold is used to prevent destruction of a dataset while the pool hold | |
819 | * is dropped, allowing other concurrent operations (e.g. spa_sync()). | |
820 | * | |
821 | * The dataset and pool must be held when this function is called. After it | |
822 | * is called, the pool hold may be released while the dataset is still held | |
823 | * and accessed. | |
824 | */ | |
825 | void | |
826 | dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) | |
827 | { | |
828 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
c13060e4 | 829 | (void) zfs_refcount_add(&ds->ds_longholds, tag); |
13fe0198 MA |
830 | } |
831 | ||
832 | void | |
833 | dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) | |
834 | { | |
424fd7c3 | 835 | (void) zfs_refcount_remove(&ds->ds_longholds, tag); |
13fe0198 MA |
836 | } |
837 | ||
838 | /* Return B_TRUE if there are any long holds on this dataset. */ | |
839 | boolean_t | |
840 | dsl_dataset_long_held(dsl_dataset_t *ds) | |
841 | { | |
424fd7c3 | 842 | return (!zfs_refcount_is_zero(&ds->ds_longholds)); |
13fe0198 MA |
843 | } |
844 | ||
34dc7c2f BB |
845 | void |
846 | dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
847 | { | |
848 | if (ds == NULL) { | |
849 | (void) strcpy(name, "mos"); | |
850 | } else { | |
851 | dsl_dir_name(ds->ds_dir, name); | |
13fe0198 | 852 | VERIFY0(dsl_dataset_get_snapname(ds)); |
34dc7c2f | 853 | if (ds->ds_snapname[0]) { |
eca7b760 IK |
854 | VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), |
855 | <, ZFS_MAX_DATASET_NAME_LEN); | |
b128c09f BB |
856 | /* |
857 | * We use a "recursive" mutex so that we | |
858 | * can call dprintf_ds() with ds_lock held. | |
859 | */ | |
34dc7c2f | 860 | if (!MUTEX_HELD(&ds->ds_lock)) { |
34dc7c2f | 861 | mutex_enter(&ds->ds_lock); |
eca7b760 IK |
862 | VERIFY3U(strlcat(name, ds->ds_snapname, |
863 | ZFS_MAX_DATASET_NAME_LEN), <, | |
864 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
865 | mutex_exit(&ds->ds_lock); |
866 | } else { | |
eca7b760 IK |
867 | VERIFY3U(strlcat(name, ds->ds_snapname, |
868 | ZFS_MAX_DATASET_NAME_LEN), <, | |
869 | ZFS_MAX_DATASET_NAME_LEN); | |
34dc7c2f BB |
870 | } |
871 | } | |
872 | } | |
873 | } | |
874 | ||
eca7b760 IK |
875 | int |
876 | dsl_dataset_namelen(dsl_dataset_t *ds) | |
877 | { | |
eca7b760 IK |
878 | VERIFY0(dsl_dataset_get_snapname(ds)); |
879 | mutex_enter(&ds->ds_lock); | |
1c27024e | 880 | int len = strlen(ds->ds_snapname); |
1118f994 | 881 | mutex_exit(&ds->ds_lock); |
a806cb6a CC |
882 | /* add '@' if ds is a snap */ |
883 | if (len > 0) | |
884 | len++; | |
885 | len += dsl_dir_namelen(ds->ds_dir); | |
eca7b760 IK |
886 | return (len); |
887 | } | |
888 | ||
34dc7c2f | 889 | void |
52ce99dd | 890 | dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
b128c09f | 891 | { |
13fe0198 | 892 | dmu_buf_rele(ds->ds_dbuf, tag); |
b128c09f BB |
893 | } |
894 | ||
895 | void | |
52ce99dd TC |
896 | dsl_dataset_remove_key_mapping(dsl_dataset_t *ds) |
897 | { | |
898 | dsl_dir_t *dd = ds->ds_dir; | |
899 | ||
900 | if (dd == NULL || dd->dd_crypto_obj == 0) | |
901 | return; | |
902 | ||
903 | (void) spa_keystore_remove_mapping(dd->dd_pool->dp_spa, | |
904 | ds->ds_object, ds); | |
905 | } | |
906 | ||
907 | void | |
908 | dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) | |
b5256303 | 909 | { |
52ce99dd TC |
910 | if (flags & DS_HOLD_FLAG_DECRYPT) |
911 | dsl_dataset_remove_key_mapping(ds); | |
912 | ||
913 | dsl_dataset_rele(ds, tag); | |
b5256303 TC |
914 | } |
915 | ||
916 | void | |
917 | dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) | |
34dc7c2f | 918 | { |
945dd935 JG |
919 | ASSERT3P(ds->ds_owner, ==, tag); |
920 | ASSERT(ds->ds_dbuf != NULL); | |
b128c09f | 921 | |
34dc7c2f | 922 | mutex_enter(&ds->ds_lock); |
b128c09f | 923 | ds->ds_owner = NULL; |
34dc7c2f | 924 | mutex_exit(&ds->ds_lock); |
13fe0198 | 925 | dsl_dataset_long_rele(ds, tag); |
b5256303 | 926 | dsl_dataset_rele_flags(ds, flags, tag); |
34dc7c2f BB |
927 | } |
928 | ||
929 | boolean_t | |
13fe0198 | 930 | dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) |
34dc7c2f | 931 | { |
b128c09f BB |
932 | boolean_t gotit = FALSE; |
933 | ||
47dfff3b | 934 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
34dc7c2f | 935 | mutex_enter(&ds->ds_lock); |
13fe0198 | 936 | if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { |
428870ff | 937 | ds->ds_owner = tag; |
13fe0198 | 938 | dsl_dataset_long_hold(ds, tag); |
b128c09f | 939 | gotit = TRUE; |
34dc7c2f BB |
940 | } |
941 | mutex_exit(&ds->ds_lock); | |
b128c09f | 942 | return (gotit); |
34dc7c2f BB |
943 | } |
944 | ||
47dfff3b MA |
945 | boolean_t |
946 | dsl_dataset_has_owner(dsl_dataset_t *ds) | |
947 | { | |
948 | boolean_t rv; | |
949 | mutex_enter(&ds->ds_lock); | |
950 | rv = (ds->ds_owner != NULL); | |
951 | mutex_exit(&ds->ds_lock); | |
952 | return (rv); | |
953 | } | |
954 | ||
d52d80b7 PD |
955 | static boolean_t |
956 | zfeature_active(spa_feature_t f, void *arg) | |
957 | { | |
958 | switch (spa_feature_table[f].fi_type) { | |
959 | case ZFEATURE_TYPE_BOOLEAN: { | |
960 | boolean_t val = (boolean_t)arg; | |
961 | ASSERT(val == B_FALSE || val == B_TRUE); | |
962 | return (val); | |
963 | } | |
964 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
965 | /* | |
966 | * In this case, arg is a uint64_t array. The feature is active | |
967 | * if the array is non-null. | |
968 | */ | |
969 | return (arg != NULL); | |
970 | default: | |
971 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
972 | return (B_FALSE); | |
973 | } | |
974 | } | |
975 | ||
976 | boolean_t | |
977 | dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f) | |
978 | { | |
979 | return (zfeature_active(f, ds->ds_feature[f])); | |
980 | } | |
981 | ||
982 | /* | |
983 | * The buffers passed out by this function are references to internal buffers; | |
984 | * they should not be freed by callers of this function, and they should not be | |
985 | * used after the dataset has been released. | |
986 | */ | |
987 | boolean_t | |
988 | dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds, spa_feature_t f, | |
989 | uint64_t *outlength, uint64_t **outp) | |
990 | { | |
991 | VERIFY(spa_feature_table[f].fi_type & ZFEATURE_TYPE_UINT64_ARRAY); | |
992 | if (!dsl_dataset_feature_is_active(ds, f)) { | |
993 | return (B_FALSE); | |
994 | } | |
995 | struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f]; | |
996 | *outp = ftuaa->array; | |
997 | *outlength = ftuaa->length; | |
998 | return (B_TRUE); | |
999 | } | |
1000 | ||
b5256303 | 1001 | void |
d52d80b7 PD |
1002 | dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg, |
1003 | dmu_tx_t *tx) | |
241b5415 MA |
1004 | { |
1005 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
1006 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
1007 | uint64_t zero = 0; | |
1008 | ||
1009 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
1010 | ||
1011 | spa_feature_incr(spa, f, tx); | |
1012 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1013 | ||
d52d80b7 PD |
1014 | switch (spa_feature_table[f].fi_type) { |
1015 | case ZFEATURE_TYPE_BOOLEAN: | |
1016 | ASSERT3S((boolean_t)arg, ==, B_TRUE); | |
1017 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
1018 | sizeof (zero), 1, &zero, tx)); | |
1019 | break; | |
1020 | case ZFEATURE_TYPE_UINT64_ARRAY: | |
1021 | { | |
1022 | struct feature_type_uint64_array_arg *ftuaa = arg; | |
1023 | VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, | |
1024 | sizeof (uint64_t), ftuaa->length, ftuaa->array, tx)); | |
1025 | break; | |
1026 | } | |
1027 | default: | |
1028 | panic("Invalid zfeature type %d", spa_feature_table[f].fi_type); | |
1029 | } | |
241b5415 MA |
1030 | } |
1031 | ||
1032 | void | |
d52d80b7 PD |
1033 | dsl_dataset_deactivate_feature_impl(dsl_dataset_t *ds, spa_feature_t f, |
1034 | dmu_tx_t *tx) | |
241b5415 MA |
1035 | { |
1036 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
1037 | objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; | |
d52d80b7 | 1038 | uint64_t dsobj = ds->ds_object; |
241b5415 MA |
1039 | |
1040 | VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); | |
1041 | ||
1042 | VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); | |
1043 | spa_feature_decr(spa, f, tx); | |
d52d80b7 PD |
1044 | ds->ds_feature[f] = NULL; |
1045 | } | |
1046 | ||
1047 | void | |
1048 | dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f, dmu_tx_t *tx) | |
1049 | { | |
1050 | unload_zfeature(ds, f); | |
1051 | dsl_dataset_deactivate_feature_impl(ds, f, tx); | |
241b5415 MA |
1052 | } |
1053 | ||
34dc7c2f | 1054 | uint64_t |
b128c09f | 1055 | dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
b5256303 | 1056 | dsl_crypto_params_t *dcp, uint64_t flags, dmu_tx_t *tx) |
34dc7c2f BB |
1057 | { |
1058 | dsl_pool_t *dp = dd->dd_pool; | |
1059 | dmu_buf_t *dbuf; | |
1060 | dsl_dataset_phys_t *dsphys; | |
1061 | uint64_t dsobj; | |
1062 | objset_t *mos = dp->dp_meta_objset; | |
1063 | ||
b128c09f BB |
1064 | if (origin == NULL) |
1065 | origin = dp->dp_origin_snap; | |
1066 | ||
34dc7c2f | 1067 | ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
d683ddbb | 1068 | ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); |
34dc7c2f | 1069 | ASSERT(dmu_tx_is_syncing(tx)); |
d683ddbb | 1070 | ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); |
34dc7c2f BB |
1071 | |
1072 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, | |
1073 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1074 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1075 | dmu_buf_will_dirty(dbuf, tx); |
1076 | dsphys = dbuf->db_data; | |
b128c09f | 1077 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1078 | dsphys->ds_dir_obj = dd->dd_object; |
1079 | dsphys->ds_flags = flags; | |
1080 | dsphys->ds_fsid_guid = unique_create(); | |
1081 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1082 | sizeof (dsphys->ds_guid)); | |
1083 | dsphys->ds_snapnames_zapobj = | |
1084 | zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, | |
1085 | DMU_OT_NONE, 0, tx); | |
1086 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1087 | dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
34dc7c2f | 1088 | |
428870ff BB |
1089 | if (origin == NULL) { |
1090 | dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); | |
1091 | } else { | |
13fe0198 | 1092 | dsl_dataset_t *ohds; /* head of the origin snapshot */ |
428870ff | 1093 | |
34dc7c2f BB |
1094 | dsphys->ds_prev_snap_obj = origin->ds_object; |
1095 | dsphys->ds_prev_snap_txg = | |
d683ddbb | 1096 | dsl_dataset_phys(origin)->ds_creation_txg; |
9ae529ec | 1097 | dsphys->ds_referenced_bytes = |
d683ddbb | 1098 | dsl_dataset_phys(origin)->ds_referenced_bytes; |
34dc7c2f | 1099 | dsphys->ds_compressed_bytes = |
d683ddbb | 1100 | dsl_dataset_phys(origin)->ds_compressed_bytes; |
34dc7c2f | 1101 | dsphys->ds_uncompressed_bytes = |
d683ddbb | 1102 | dsl_dataset_phys(origin)->ds_uncompressed_bytes; |
cc9bb3e5 | 1103 | rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 1104 | dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; |
cc9bb3e5 | 1105 | rrw_exit(&origin->ds_bp_rwlock, FTAG); |
4b20a6f5 MA |
1106 | |
1107 | /* | |
1108 | * Inherit flags that describe the dataset's contents | |
1109 | * (INCONSISTENT) or properties (Case Insensitive). | |
1110 | */ | |
d683ddbb | 1111 | dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & |
4b20a6f5 | 1112 | (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); |
34dc7c2f | 1113 | |
1c27024e | 1114 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
1115 | if (zfeature_active(f, origin->ds_feature[f])) { |
1116 | dsl_dataset_activate_feature(dsobj, f, | |
1117 | origin->ds_feature[f], tx); | |
1118 | } | |
241b5415 | 1119 | } |
f1512ee6 | 1120 | |
34dc7c2f | 1121 | dmu_buf_will_dirty(origin->ds_dbuf, tx); |
d683ddbb | 1122 | dsl_dataset_phys(origin)->ds_num_children++; |
34dc7c2f | 1123 | |
13fe0198 | 1124 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb JG |
1125 | dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, |
1126 | FTAG, &ohds)); | |
428870ff BB |
1127 | dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, |
1128 | dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); | |
1129 | dsl_dataset_rele(ohds, FTAG); | |
1130 | ||
b128c09f | 1131 | if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
d683ddbb JG |
1132 | if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { |
1133 | dsl_dataset_phys(origin)->ds_next_clones_obj = | |
b128c09f BB |
1134 | zap_create(mos, |
1135 | DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); | |
1136 | } | |
13fe0198 | 1137 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
1138 | dsl_dataset_phys(origin)->ds_next_clones_obj, |
1139 | dsobj, tx)); | |
b128c09f BB |
1140 | } |
1141 | ||
34dc7c2f | 1142 | dmu_buf_will_dirty(dd->dd_dbuf, tx); |
d683ddbb | 1143 | dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; |
428870ff | 1144 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
d683ddbb | 1145 | if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { |
428870ff | 1146 | dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); |
d683ddbb | 1147 | dsl_dir_phys(origin->ds_dir)->dd_clones = |
428870ff BB |
1148 | zap_create(mos, |
1149 | DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); | |
1150 | } | |
13fe0198 | 1151 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
1152 | dsl_dir_phys(origin->ds_dir)->dd_clones, |
1153 | dsobj, tx)); | |
428870ff | 1154 | } |
34dc7c2f BB |
1155 | } |
1156 | ||
b5256303 TC |
1157 | /* handle encryption */ |
1158 | dsl_dataset_create_crypt_sync(dsobj, dd, origin, dcp, tx); | |
1159 | ||
34dc7c2f BB |
1160 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
1161 | dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; | |
1162 | ||
1163 | dmu_buf_rele(dbuf, FTAG); | |
1164 | ||
1165 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb | 1166 | dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; |
34dc7c2f BB |
1167 | |
1168 | return (dsobj); | |
1169 | } | |
1170 | ||
13fe0198 MA |
1171 | static void |
1172 | dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1173 | { | |
1174 | objset_t *os; | |
1175 | ||
1176 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
0efd9791 AG |
1177 | if (bcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) { |
1178 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1179 | zio_t *zio; | |
1180 | ||
1181 | bzero(&os->os_zil_header, sizeof (os->os_zil_header)); | |
b5256303 | 1182 | if (os->os_encrypted) |
1b66810b | 1183 | os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE; |
0efd9791 AG |
1184 | |
1185 | zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
1186 | dsl_dataset_sync(ds, zio, tx); | |
1187 | VERIFY0(zio_wait(zio)); | |
1188 | ||
1189 | /* dsl_dataset_sync_done will drop this reference. */ | |
1190 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1191 | dsl_dataset_sync_done(ds, tx); | |
1192 | } | |
13fe0198 MA |
1193 | } |
1194 | ||
34dc7c2f BB |
1195 | uint64_t |
1196 | dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, | |
b5256303 TC |
1197 | dsl_dataset_t *origin, uint64_t flags, cred_t *cr, |
1198 | dsl_crypto_params_t *dcp, dmu_tx_t *tx) | |
34dc7c2f BB |
1199 | { |
1200 | dsl_pool_t *dp = pdd->dd_pool; | |
1201 | uint64_t dsobj, ddobj; | |
1202 | dsl_dir_t *dd; | |
1203 | ||
13fe0198 | 1204 | ASSERT(dmu_tx_is_syncing(tx)); |
34dc7c2f BB |
1205 | ASSERT(lastname[0] != '@'); |
1206 | ||
b128c09f | 1207 | ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
13fe0198 | 1208 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); |
34dc7c2f | 1209 | |
b5256303 | 1210 | dsobj = dsl_dataset_create_sync_dd(dd, origin, dcp, |
13fe0198 | 1211 | flags & ~DS_CREATE_FLAG_NODIRTY, tx); |
34dc7c2f BB |
1212 | |
1213 | dsl_deleg_set_create_perms(dd, tx, cr); | |
1214 | ||
788eb90c JJ |
1215 | /* |
1216 | * Since we're creating a new node we know it's a leaf, so we can | |
1217 | * initialize the counts if the limit feature is active. | |
1218 | */ | |
1219 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { | |
1220 | uint64_t cnt = 0; | |
1221 | objset_t *os = dd->dd_pool->dp_meta_objset; | |
1222 | ||
1223 | dsl_dir_zapify(dd, tx); | |
1224 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, | |
1225 | sizeof (cnt), 1, &cnt, tx)); | |
1226 | VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, | |
1227 | sizeof (cnt), 1, &cnt, tx)); | |
1228 | } | |
1229 | ||
13fe0198 | 1230 | dsl_dir_rele(dd, FTAG); |
34dc7c2f | 1231 | |
572e2857 BB |
1232 | /* |
1233 | * If we are creating a clone, make sure we zero out any stale | |
1234 | * data from the origin snapshots zil header. | |
1235 | */ | |
13fe0198 | 1236 | if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { |
572e2857 | 1237 | dsl_dataset_t *ds; |
572e2857 | 1238 | |
13fe0198 MA |
1239 | VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); |
1240 | dsl_dataset_zero_zil(ds, tx); | |
572e2857 BB |
1241 | dsl_dataset_rele(ds, FTAG); |
1242 | } | |
1243 | ||
34dc7c2f BB |
1244 | return (dsobj); |
1245 | } | |
1246 | ||
34dc7c2f | 1247 | /* |
13fe0198 MA |
1248 | * The unique space in the head dataset can be calculated by subtracting |
1249 | * the space used in the most recent snapshot, that is still being used | |
1250 | * in this file system, from the space currently in use. To figure out | |
1251 | * the space in the most recent snapshot still in use, we need to take | |
1252 | * the total space used in the snapshot and subtract out the space that | |
1253 | * has been freed up since the snapshot was taken. | |
34dc7c2f | 1254 | */ |
13fe0198 MA |
1255 | void |
1256 | dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) | |
34dc7c2f | 1257 | { |
13fe0198 MA |
1258 | uint64_t mrs_used; |
1259 | uint64_t dlused, dlcomp, dluncomp; | |
34dc7c2f | 1260 | |
0c66c32d | 1261 | ASSERT(!ds->ds_is_snapshot); |
34dc7c2f | 1262 | |
d683ddbb JG |
1263 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) |
1264 | mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; | |
13fe0198 MA |
1265 | else |
1266 | mrs_used = 0; | |
45d1cae3 | 1267 | |
13fe0198 | 1268 | dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); |
34dc7c2f | 1269 | |
13fe0198 | 1270 | ASSERT3U(dlused, <=, mrs_used); |
d683ddbb JG |
1271 | dsl_dataset_phys(ds)->ds_unique_bytes = |
1272 | dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); | |
330d06f9 | 1273 | |
13fe0198 MA |
1274 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
1275 | SPA_VERSION_UNIQUE_ACCURATE) | |
d683ddbb | 1276 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f BB |
1277 | } |
1278 | ||
13fe0198 MA |
1279 | void |
1280 | dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, | |
1281 | dmu_tx_t *tx) | |
45d1cae3 | 1282 | { |
13fe0198 | 1283 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
13fe0198 | 1284 | ASSERTV(uint64_t count); |
1c27024e | 1285 | int err; |
13fe0198 | 1286 | |
d683ddbb JG |
1287 | ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); |
1288 | err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
1289 | obj, tx); | |
13fe0198 MA |
1290 | /* |
1291 | * The err should not be ENOENT, but a bug in a previous version | |
1292 | * of the code could cause upgrade_clones_cb() to not set | |
1293 | * ds_next_snap_obj when it should, leading to a missing entry. | |
1294 | * If we knew that the pool was created after | |
1295 | * SPA_VERSION_NEXT_CLONES, we could assert that it isn't | |
1296 | * ENOENT. However, at least we can check that we don't have | |
1297 | * too many entries in the next_clones_obj even after failing to | |
1298 | * remove this one. | |
1299 | */ | |
1300 | if (err != ENOENT) | |
1301 | VERIFY0(err); | |
d683ddbb | 1302 | ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, |
13fe0198 | 1303 | &count)); |
d683ddbb | 1304 | ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); |
13fe0198 | 1305 | } |
45d1cae3 | 1306 | |
45d1cae3 | 1307 | |
13fe0198 MA |
1308 | blkptr_t * |
1309 | dsl_dataset_get_blkptr(dsl_dataset_t *ds) | |
1310 | { | |
d683ddbb | 1311 | return (&dsl_dataset_phys(ds)->ds_bp); |
45d1cae3 BB |
1312 | } |
1313 | ||
13fe0198 MA |
1314 | spa_t * |
1315 | dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1316 | { | |
1317 | return (ds->ds_dir->dd_pool->dp_spa); | |
45d1cae3 BB |
1318 | } |
1319 | ||
13fe0198 MA |
1320 | void |
1321 | dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
34dc7c2f | 1322 | { |
13fe0198 | 1323 | dsl_pool_t *dp; |
45d1cae3 | 1324 | |
13fe0198 MA |
1325 | if (ds == NULL) /* this is the meta-objset */ |
1326 | return; | |
34dc7c2f | 1327 | |
428870ff | 1328 | ASSERT(ds->ds_objset != NULL); |
34dc7c2f | 1329 | |
d683ddbb | 1330 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) |
34dc7c2f BB |
1331 | panic("dirtying snapshot!"); |
1332 | ||
0efd9791 AG |
1333 | /* Must not dirty a dataset in the same txg where it got snapshotted. */ |
1334 | ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); | |
34dc7c2f | 1335 | |
0efd9791 | 1336 | dp = ds->ds_dir->dd_pool; |
13fe0198 | 1337 | if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { |
52ce99dd TC |
1338 | objset_t *os = ds->ds_objset; |
1339 | ||
34dc7c2f BB |
1340 | /* up the hold count until we can be written out */ |
1341 | dmu_buf_add_ref(ds->ds_dbuf, ds); | |
52ce99dd TC |
1342 | |
1343 | /* if this dataset is encrypted, grab a reference to the DCK */ | |
1344 | if (ds->ds_dir->dd_crypto_obj != 0 && | |
1345 | !os->os_raw_receive && | |
1346 | !os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { | |
1347 | ASSERT3P(ds->ds_key_mapping, !=, NULL); | |
1348 | key_mapping_add_ref(ds->ds_key_mapping, ds); | |
1349 | } | |
34dc7c2f BB |
1350 | } |
1351 | } | |
1352 | ||
34dc7c2f | 1353 | static int |
13fe0198 | 1354 | dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
34dc7c2f | 1355 | { |
13fe0198 | 1356 | uint64_t asize; |
34dc7c2f | 1357 | |
13fe0198 | 1358 | if (!dmu_tx_is_syncing(tx)) |
b128c09f BB |
1359 | return (0); |
1360 | ||
34dc7c2f | 1361 | /* |
13fe0198 MA |
1362 | * If there's an fs-only reservation, any blocks that might become |
1363 | * owned by the snapshot dataset must be accommodated by space | |
1364 | * outside of the reservation. | |
34dc7c2f | 1365 | */ |
13fe0198 | 1366 | ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); |
d683ddbb | 1367 | asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); |
13fe0198 | 1368 | if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
2e528b49 | 1369 | return (SET_ERROR(ENOSPC)); |
34dc7c2f BB |
1370 | |
1371 | /* | |
13fe0198 MA |
1372 | * Propagate any reserved space for this snapshot to other |
1373 | * snapshot checks in this sync group. | |
34dc7c2f | 1374 | */ |
13fe0198 MA |
1375 | if (asize > 0) |
1376 | dsl_dir_willuse_space(ds->ds_dir, asize, tx); | |
34dc7c2f BB |
1377 | |
1378 | return (0); | |
1379 | } | |
1380 | ||
34dc7c2f | 1381 | int |
13fe0198 | 1382 | dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, |
788eb90c | 1383 | dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) |
34dc7c2f | 1384 | { |
13fe0198 MA |
1385 | int error; |
1386 | uint64_t value; | |
34dc7c2f | 1387 | |
13fe0198 | 1388 | ds->ds_trysnap_txg = tx->tx_txg; |
b128c09f | 1389 | |
13fe0198 | 1390 | if (!dmu_tx_is_syncing(tx)) |
45d1cae3 | 1391 | return (0); |
34dc7c2f BB |
1392 | |
1393 | /* | |
13fe0198 MA |
1394 | * We don't allow multiple snapshots of the same txg. If there |
1395 | * is already one, try again. | |
34dc7c2f | 1396 | */ |
d683ddbb | 1397 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) |
2e528b49 | 1398 | return (SET_ERROR(EAGAIN)); |
34dc7c2f BB |
1399 | |
1400 | /* | |
13fe0198 | 1401 | * Check for conflicting snapshot name. |
34dc7c2f | 1402 | */ |
13fe0198 MA |
1403 | error = dsl_dataset_snap_lookup(ds, snapname, &value); |
1404 | if (error == 0) | |
2e528b49 | 1405 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
1406 | if (error != ENOENT) |
1407 | return (error); | |
45d1cae3 | 1408 | |
96c2e961 KW |
1409 | /* |
1410 | * We don't allow taking snapshots of inconsistent datasets, such as | |
1411 | * those into which we are currently receiving. However, if we are | |
1412 | * creating this snapshot as part of a receive, this check will be | |
1413 | * executed atomically with respect to the completion of the receive | |
1414 | * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this | |
1415 | * case we ignore this, knowing it will be fixed up for us shortly in | |
1416 | * dmu_recv_end_sync(). | |
1417 | */ | |
1418 | if (!recv && DS_IS_INCONSISTENT(ds)) | |
1419 | return (SET_ERROR(EBUSY)); | |
1420 | ||
788eb90c JJ |
1421 | /* |
1422 | * Skip the check for temporary snapshots or if we have already checked | |
1423 | * the counts in dsl_dataset_snapshot_check. This means we really only | |
1424 | * check the count here when we're receiving a stream. | |
1425 | */ | |
1426 | if (cnt != 0 && cr != NULL) { | |
1427 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1428 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); | |
1429 | if (error != 0) | |
1430 | return (error); | |
1431 | } | |
1432 | ||
13fe0198 MA |
1433 | error = dsl_dataset_snapshot_reserve_space(ds, tx); |
1434 | if (error != 0) | |
1435 | return (error); | |
45d1cae3 | 1436 | |
34dc7c2f BB |
1437 | return (0); |
1438 | } | |
1439 | ||
234c91c5 | 1440 | int |
13fe0198 | 1441 | dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) |
b128c09f | 1442 | { |
13fe0198 MA |
1443 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1444 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1445 | nvpair_t *pair; | |
1446 | int rv = 0; | |
b128c09f | 1447 | |
788eb90c JJ |
1448 | /* |
1449 | * Pre-compute how many total new snapshots will be created for each | |
1450 | * level in the tree and below. This is needed for validating the | |
1451 | * snapshot limit when either taking a recursive snapshot or when | |
1452 | * taking multiple snapshots. | |
1453 | * | |
1454 | * The problem is that the counts are not actually adjusted when | |
1455 | * we are checking, only when we finally sync. For a single snapshot, | |
1456 | * this is easy, the count will increase by 1 at each node up the tree, | |
1457 | * but its more complicated for the recursive/multiple snapshot case. | |
1458 | * | |
1459 | * The dsl_fs_ss_limit_check function does recursively check the count | |
1460 | * at each level up the tree but since it is validating each snapshot | |
1461 | * independently we need to be sure that we are validating the complete | |
1462 | * count for the entire set of snapshots. We do this by rolling up the | |
1463 | * counts for each component of the name into an nvlist and then | |
1464 | * checking each of those cases with the aggregated count. | |
1465 | * | |
1466 | * This approach properly handles not only the recursive snapshot | |
1467 | * case (where we get all of those on the ddsa_snaps list) but also | |
1468 | * the sibling case (e.g. snapshot a/b and a/c so that we will also | |
1469 | * validate the limit on 'a' using a count of 2). | |
1470 | * | |
1471 | * We validate the snapshot names in the third loop and only report | |
1472 | * name errors once. | |
1473 | */ | |
1474 | if (dmu_tx_is_syncing(tx)) { | |
1475 | char *nm; | |
1476 | nvlist_t *cnt_track = NULL; | |
1477 | cnt_track = fnvlist_alloc(); | |
1478 | ||
1479 | nm = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
1480 | ||
1481 | /* Rollup aggregated counts into the cnt_track list */ | |
1482 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); | |
1483 | pair != NULL; | |
1484 | pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1485 | char *pdelim; | |
1486 | uint64_t val; | |
1487 | ||
1488 | (void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN); | |
1489 | pdelim = strchr(nm, '@'); | |
1490 | if (pdelim == NULL) | |
1491 | continue; | |
1492 | *pdelim = '\0'; | |
1493 | ||
1494 | do { | |
1495 | if (nvlist_lookup_uint64(cnt_track, nm, | |
1496 | &val) == 0) { | |
1497 | /* update existing entry */ | |
1498 | fnvlist_add_uint64(cnt_track, nm, | |
1499 | val + 1); | |
1500 | } else { | |
1501 | /* add to list */ | |
1502 | fnvlist_add_uint64(cnt_track, nm, 1); | |
1503 | } | |
1504 | ||
1505 | pdelim = strrchr(nm, '/'); | |
1506 | if (pdelim != NULL) | |
1507 | *pdelim = '\0'; | |
1508 | } while (pdelim != NULL); | |
1509 | } | |
1510 | ||
1511 | kmem_free(nm, MAXPATHLEN); | |
1512 | ||
1513 | /* Check aggregated counts at each level */ | |
1514 | for (pair = nvlist_next_nvpair(cnt_track, NULL); | |
1515 | pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { | |
1516 | int error = 0; | |
1517 | char *name; | |
1518 | uint64_t cnt = 0; | |
1519 | dsl_dataset_t *ds; | |
1520 | ||
1521 | name = nvpair_name(pair); | |
1522 | cnt = fnvpair_value_uint64(pair); | |
1523 | ASSERT(cnt > 0); | |
1524 | ||
1525 | error = dsl_dataset_hold(dp, name, FTAG, &ds); | |
1526 | if (error == 0) { | |
1527 | error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, | |
1528 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, | |
1529 | ddsa->ddsa_cr); | |
1530 | dsl_dataset_rele(ds, FTAG); | |
1531 | } | |
1532 | ||
1533 | if (error != 0) { | |
1534 | if (ddsa->ddsa_errors != NULL) | |
1535 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1536 | name, error); | |
1537 | rv = error; | |
1538 | /* only report one error for this check */ | |
1539 | break; | |
1540 | } | |
1541 | } | |
1542 | nvlist_free(cnt_track); | |
1543 | } | |
1544 | ||
13fe0198 MA |
1545 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1546 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1547 | int error = 0; | |
1548 | dsl_dataset_t *ds; | |
689f093e | 1549 | char *name, *atp = NULL; |
eca7b760 | 1550 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1551 | |
1552 | name = nvpair_name(pair); | |
eca7b760 | 1553 | if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 1554 | error = SET_ERROR(ENAMETOOLONG); |
13fe0198 MA |
1555 | if (error == 0) { |
1556 | atp = strchr(name, '@'); | |
1557 | if (atp == NULL) | |
2e528b49 | 1558 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1559 | if (error == 0) |
1560 | (void) strlcpy(dsname, name, atp - name + 1); | |
1561 | } | |
1562 | if (error == 0) | |
1563 | error = dsl_dataset_hold(dp, dsname, FTAG, &ds); | |
1564 | if (error == 0) { | |
788eb90c | 1565 | /* passing 0/NULL skips dsl_fs_ss_limit_check */ |
13fe0198 | 1566 | error = dsl_dataset_snapshot_check_impl(ds, |
788eb90c | 1567 | atp + 1, tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1568 | dsl_dataset_rele(ds, FTAG); |
1569 | } | |
b128c09f | 1570 | |
13fe0198 MA |
1571 | if (error != 0) { |
1572 | if (ddsa->ddsa_errors != NULL) { | |
1573 | fnvlist_add_int32(ddsa->ddsa_errors, | |
1574 | name, error); | |
1575 | } | |
1576 | rv = error; | |
1577 | } | |
1578 | } | |
788eb90c | 1579 | |
13fe0198 | 1580 | return (rv); |
b128c09f BB |
1581 | } |
1582 | ||
13fe0198 MA |
1583 | void |
1584 | dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, | |
1585 | dmu_tx_t *tx) | |
428870ff | 1586 | { |
13fe0198 MA |
1587 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
1588 | dmu_buf_t *dbuf; | |
1589 | dsl_dataset_phys_t *dsphys; | |
1590 | uint64_t dsobj, crtxg; | |
1591 | objset_t *mos = dp->dp_meta_objset; | |
1592 | ASSERTV(static zil_header_t zero_zil); | |
1593 | ASSERTV(objset_t *os); | |
1594 | ||
1595 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
428870ff | 1596 | |
428870ff | 1597 | /* |
13fe0198 MA |
1598 | * If we are on an old pool, the zil must not be active, in which |
1599 | * case it will be zeroed. Usually zil_suspend() accomplishes this. | |
428870ff | 1600 | */ |
13fe0198 MA |
1601 | ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || |
1602 | dmu_objset_from_ds(ds, &os) != 0 || | |
1603 | bcmp(&os->os_phys->os_zil_header, &zero_zil, | |
1604 | sizeof (zero_zil)) == 0); | |
428870ff | 1605 | |
0efd9791 AG |
1606 | /* Should not snapshot a dirty dataset. */ |
1607 | ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, | |
1608 | ds, tx->tx_txg)); | |
1609 | ||
788eb90c | 1610 | dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); |
428870ff BB |
1611 | |
1612 | /* | |
13fe0198 | 1613 | * The origin's ds_creation_txg has to be < TXG_INITIAL |
b128c09f BB |
1614 | */ |
1615 | if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) | |
1616 | crtxg = 1; | |
1617 | else | |
1618 | crtxg = tx->tx_txg; | |
1619 | ||
34dc7c2f BB |
1620 | dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
1621 | DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); | |
13fe0198 | 1622 | VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
34dc7c2f BB |
1623 | dmu_buf_will_dirty(dbuf, tx); |
1624 | dsphys = dbuf->db_data; | |
b128c09f | 1625 | bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
34dc7c2f BB |
1626 | dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
1627 | dsphys->ds_fsid_guid = unique_create(); | |
1628 | (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1629 | sizeof (dsphys->ds_guid)); | |
d683ddbb JG |
1630 | dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
1631 | dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
34dc7c2f BB |
1632 | dsphys->ds_next_snap_obj = ds->ds_object; |
1633 | dsphys->ds_num_children = 1; | |
1634 | dsphys->ds_creation_time = gethrestime_sec(); | |
b128c09f | 1635 | dsphys->ds_creation_txg = crtxg; |
d683ddbb JG |
1636 | dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
1637 | dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; | |
1638 | dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
1639 | dsphys->ds_uncompressed_bytes = | |
1640 | dsl_dataset_phys(ds)->ds_uncompressed_bytes; | |
1641 | dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; | |
cc9bb3e5 | 1642 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 1643 | dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; |
cc9bb3e5 | 1644 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
1645 | dmu_buf_rele(dbuf, FTAG); |
1646 | ||
1c27024e | 1647 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
1648 | if (zfeature_active(f, ds->ds_feature[f])) { |
1649 | dsl_dataset_activate_feature(dsobj, f, | |
1650 | ds->ds_feature[f], tx); | |
1651 | } | |
241b5415 | 1652 | } |
f1512ee6 | 1653 | |
d683ddbb JG |
1654 | ASSERT3U(ds->ds_prev != 0, ==, |
1655 | dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); | |
34dc7c2f | 1656 | if (ds->ds_prev) { |
b128c09f | 1657 | uint64_t next_clones_obj = |
d683ddbb JG |
1658 | dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; |
1659 | ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
34dc7c2f | 1660 | ds->ds_object || |
d683ddbb JG |
1661 | dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); |
1662 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == | |
1663 | ds->ds_object) { | |
34dc7c2f | 1664 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
d683ddbb JG |
1665 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, |
1666 | dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); | |
1667 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; | |
b128c09f | 1668 | } else if (next_clones_obj != 0) { |
13fe0198 | 1669 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
428870ff | 1670 | dsphys->ds_next_snap_obj, tx); |
13fe0198 | 1671 | VERIFY0(zap_add_int(mos, |
b128c09f | 1672 | next_clones_obj, dsobj, tx)); |
34dc7c2f BB |
1673 | } |
1674 | } | |
1675 | ||
1676 | /* | |
1677 | * If we have a reference-reservation on this dataset, we will | |
1678 | * need to increase the amount of refreservation being charged | |
1679 | * since our unique space is going to zero. | |
1680 | */ | |
1681 | if (ds->ds_reserved) { | |
428870ff BB |
1682 | int64_t delta; |
1683 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb JG |
1684 | delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, |
1685 | ds->ds_reserved); | |
b128c09f | 1686 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, |
428870ff | 1687 | delta, 0, 0, tx); |
34dc7c2f BB |
1688 | } |
1689 | ||
34dc7c2f | 1690 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb JG |
1691 | dsl_dataset_phys(ds)->ds_deadlist_obj = |
1692 | dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, | |
1693 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
428870ff | 1694 | dsl_deadlist_close(&ds->ds_deadlist); |
d683ddbb JG |
1695 | dsl_deadlist_open(&ds->ds_deadlist, mos, |
1696 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
428870ff | 1697 | dsl_deadlist_add_key(&ds->ds_deadlist, |
d683ddbb | 1698 | dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); |
428870ff | 1699 | |
a1d477c2 MA |
1700 | if (dsl_dataset_remap_deadlist_exists(ds)) { |
1701 | uint64_t remap_deadlist_obj = | |
1702 | dsl_dataset_get_remap_deadlist_object(ds); | |
1703 | /* | |
1704 | * Move the remap_deadlist to the snapshot. The head | |
1705 | * will create a new remap deadlist on demand, from | |
1706 | * dsl_dataset_block_remapped(). | |
1707 | */ | |
1708 | dsl_dataset_unset_remap_deadlist_object(ds, tx); | |
1709 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
1710 | ||
1711 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1712 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_REMAP_DEADLIST, | |
1713 | sizeof (remap_deadlist_obj), 1, &remap_deadlist_obj, tx)); | |
1714 | } | |
1715 | ||
f00ab3f2 TC |
1716 | /* |
1717 | * Create a ivset guid for this snapshot if the dataset is | |
1718 | * encrypted. This may be overridden by a raw receive. A | |
1719 | * previous implementation of this code did not have this | |
1720 | * field as part of the on-disk format for ZFS encryption | |
1721 | * (see errata #4). As part of the remediation for this | |
1722 | * issue, we ask the user to enable the bookmark_v2 feature | |
1723 | * which is now a dependency of the encryption feature. We | |
1724 | * use this as a heuristic to determine when the user has | |
1725 | * elected to correct any datasets created with the old code. | |
1726 | * As a result, we only do this step if the bookmark_v2 | |
1727 | * feature is enabled, which limits the number of states a | |
1728 | * given pool / dataset can be in with regards to terms of | |
1729 | * correcting the issue. | |
1730 | */ | |
1731 | if (ds->ds_dir->dd_crypto_obj != 0 && | |
1732 | spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARK_V2)) { | |
1733 | uint64_t ivset_guid = unique_create(); | |
1734 | ||
1735 | dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); | |
1736 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_IVSET_GUID, | |
1737 | sizeof (ivset_guid), 1, &ivset_guid, tx)); | |
1738 | } | |
1739 | ||
d683ddbb JG |
1740 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); |
1741 | dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; | |
1742 | dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; | |
1743 | dsl_dataset_phys(ds)->ds_unique_bytes = 0; | |
a1d477c2 | 1744 | |
34dc7c2f | 1745 | if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
d683ddbb | 1746 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
34dc7c2f | 1747 | |
d683ddbb | 1748 | VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
13fe0198 | 1749 | snapname, 8, 1, &dsobj, tx)); |
34dc7c2f BB |
1750 | |
1751 | if (ds->ds_prev) | |
13fe0198 MA |
1752 | dsl_dataset_rele(ds->ds_prev, ds); |
1753 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 1754 | dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); |
b128c09f | 1755 | |
428870ff BB |
1756 | dsl_scan_ds_snapshotted(ds, tx); |
1757 | ||
1758 | dsl_dir_snap_cmtime_update(ds->ds_dir); | |
34dc7c2f | 1759 | |
6f1ffb06 | 1760 | spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); |
34dc7c2f BB |
1761 | } |
1762 | ||
234c91c5 | 1763 | void |
13fe0198 | 1764 | dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1765 | { |
13fe0198 MA |
1766 | dsl_dataset_snapshot_arg_t *ddsa = arg; |
1767 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1768 | nvpair_t *pair; | |
34dc7c2f | 1769 | |
13fe0198 MA |
1770 | for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); |
1771 | pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { | |
1772 | dsl_dataset_t *ds; | |
1773 | char *name, *atp; | |
eca7b760 | 1774 | char dsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1775 | |
1776 | name = nvpair_name(pair); | |
1777 | atp = strchr(name, '@'); | |
1778 | (void) strlcpy(dsname, name, atp - name + 1); | |
1779 | VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); | |
1780 | ||
1781 | dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); | |
1782 | if (ddsa->ddsa_props != NULL) { | |
1783 | dsl_props_set_sync_impl(ds->ds_prev, | |
1784 | ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); | |
1785 | } | |
a0bd735a | 1786 | zvol_create_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
1787 | dsl_dataset_rele(ds, FTAG); |
1788 | } | |
34dc7c2f BB |
1789 | } |
1790 | ||
13fe0198 MA |
1791 | /* |
1792 | * The snapshots must all be in the same pool. | |
1793 | * All-or-nothing: if there are any failures, nothing will be modified. | |
1794 | */ | |
1795 | int | |
1796 | dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) | |
330d06f9 | 1797 | { |
13fe0198 MA |
1798 | dsl_dataset_snapshot_arg_t ddsa; |
1799 | nvpair_t *pair; | |
1800 | boolean_t needsuspend; | |
1801 | int error; | |
1802 | spa_t *spa; | |
1803 | char *firstname; | |
1804 | nvlist_t *suspended = NULL; | |
330d06f9 | 1805 | |
13fe0198 MA |
1806 | pair = nvlist_next_nvpair(snaps, NULL); |
1807 | if (pair == NULL) | |
1808 | return (0); | |
1809 | firstname = nvpair_name(pair); | |
1810 | ||
1811 | error = spa_open(firstname, &spa, FTAG); | |
1812 | if (error != 0) | |
1813 | return (error); | |
1814 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1815 | spa_close(spa, FTAG); | |
1816 | ||
1817 | if (needsuspend) { | |
1818 | suspended = fnvlist_alloc(); | |
1819 | for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; | |
1820 | pair = nvlist_next_nvpair(snaps, pair)) { | |
eca7b760 | 1821 | char fsname[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1822 | char *snapname = nvpair_name(pair); |
1823 | char *atp; | |
1824 | void *cookie; | |
1825 | ||
1826 | atp = strchr(snapname, '@'); | |
1827 | if (atp == NULL) { | |
2e528b49 | 1828 | error = SET_ERROR(EINVAL); |
13fe0198 MA |
1829 | break; |
1830 | } | |
1831 | (void) strlcpy(fsname, snapname, atp - snapname + 1); | |
1832 | ||
1833 | error = zil_suspend(fsname, &cookie); | |
1834 | if (error != 0) | |
1835 | break; | |
1836 | fnvlist_add_uint64(suspended, fsname, | |
1837 | (uintptr_t)cookie); | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | ddsa.ddsa_snaps = snaps; | |
1842 | ddsa.ddsa_props = props; | |
1843 | ddsa.ddsa_errors = errors; | |
788eb90c | 1844 | ddsa.ddsa_cr = CRED(); |
13fe0198 MA |
1845 | |
1846 | if (error == 0) { | |
1847 | error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, | |
1848 | dsl_dataset_snapshot_sync, &ddsa, | |
3d45fdd6 | 1849 | fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
1850 | } |
1851 | ||
1852 | if (suspended != NULL) { | |
1853 | for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; | |
1854 | pair = nvlist_next_nvpair(suspended, pair)) { | |
1855 | zil_resume((void *)(uintptr_t) | |
1856 | fnvpair_value_uint64(pair)); | |
1857 | } | |
1858 | fnvlist_free(suspended); | |
1859 | } | |
1860 | ||
1861 | return (error); | |
1862 | } | |
1863 | ||
1864 | typedef struct dsl_dataset_snapshot_tmp_arg { | |
1865 | const char *ddsta_fsname; | |
1866 | const char *ddsta_snapname; | |
1867 | minor_t ddsta_cleanup_minor; | |
1868 | const char *ddsta_htag; | |
1869 | } dsl_dataset_snapshot_tmp_arg_t; | |
1870 | ||
1871 | static int | |
1872 | dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) | |
1873 | { | |
1874 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1875 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1876 | dsl_dataset_t *ds; | |
1877 | int error; | |
1878 | ||
1879 | error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); | |
1880 | if (error != 0) | |
1881 | return (error); | |
1882 | ||
788eb90c | 1883 | /* NULL cred means no limit check for tmp snapshot */ |
96c2e961 | 1884 | error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, |
788eb90c | 1885 | tx, B_FALSE, 0, NULL); |
13fe0198 MA |
1886 | if (error != 0) { |
1887 | dsl_dataset_rele(ds, FTAG); | |
1888 | return (error); | |
1889 | } | |
1890 | ||
1891 | if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { | |
1892 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1893 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
1894 | } |
1895 | error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, | |
1896 | B_TRUE, tx); | |
1897 | if (error != 0) { | |
1898 | dsl_dataset_rele(ds, FTAG); | |
1899 | return (error); | |
1900 | } | |
1901 | ||
1902 | dsl_dataset_rele(ds, FTAG); | |
1903 | return (0); | |
1904 | } | |
1905 | ||
1906 | static void | |
1907 | dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) | |
1908 | { | |
1909 | dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; | |
1910 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 1911 | dsl_dataset_t *ds = NULL; |
13fe0198 MA |
1912 | |
1913 | VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); | |
1914 | ||
1915 | dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); | |
1916 | dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, | |
1917 | ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); | |
1918 | dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); | |
1919 | ||
1920 | dsl_dataset_rele(ds, FTAG); | |
1921 | } | |
1922 | ||
1923 | int | |
1924 | dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, | |
1925 | minor_t cleanup_minor, const char *htag) | |
1926 | { | |
1927 | dsl_dataset_snapshot_tmp_arg_t ddsta; | |
1928 | int error; | |
1929 | spa_t *spa; | |
1930 | boolean_t needsuspend; | |
1931 | void *cookie; | |
1932 | ||
1933 | ddsta.ddsta_fsname = fsname; | |
1934 | ddsta.ddsta_snapname = snapname; | |
1935 | ddsta.ddsta_cleanup_minor = cleanup_minor; | |
1936 | ddsta.ddsta_htag = htag; | |
1937 | ||
1938 | error = spa_open(fsname, &spa, FTAG); | |
1939 | if (error != 0) | |
1940 | return (error); | |
1941 | needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); | |
1942 | spa_close(spa, FTAG); | |
1943 | ||
1944 | if (needsuspend) { | |
1945 | error = zil_suspend(fsname, &cookie); | |
1946 | if (error != 0) | |
1947 | return (error); | |
1948 | } | |
1949 | ||
1950 | error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, | |
3d45fdd6 | 1951 | dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); |
13fe0198 MA |
1952 | |
1953 | if (needsuspend) | |
1954 | zil_resume(cookie); | |
1955 | return (error); | |
1956 | } | |
1957 | ||
13fe0198 MA |
1958 | void |
1959 | dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) | |
1960 | { | |
1961 | ASSERT(dmu_tx_is_syncing(tx)); | |
1962 | ASSERT(ds->ds_objset != NULL); | |
d683ddbb | 1963 | ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); |
13fe0198 MA |
1964 | |
1965 | /* | |
1966 | * in case we had to change ds_fsid_guid when we opened it, | |
1967 | * sync it out now. | |
1968 | */ | |
1969 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 1970 | dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; |
13fe0198 | 1971 | |
47dfff3b MA |
1972 | if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { |
1973 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1974 | ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, | |
1975 | &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); | |
1976 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1977 | ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, | |
1978 | &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); | |
1979 | VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, | |
1980 | ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, | |
1981 | &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); | |
1982 | ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; | |
1983 | ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; | |
1984 | ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; | |
1985 | } | |
1986 | ||
13fe0198 | 1987 | dmu_objset_sync(ds->ds_objset, zio, tx); |
f1512ee6 | 1988 | |
1c27024e | 1989 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
d52d80b7 PD |
1990 | if (zfeature_active(f, ds->ds_feature_activation[f])) { |
1991 | if (zfeature_active(f, ds->ds_feature[f])) | |
241b5415 | 1992 | continue; |
d52d80b7 PD |
1993 | dsl_dataset_activate_feature(ds->ds_object, f, |
1994 | ds->ds_feature_activation[f], tx); | |
1995 | ds->ds_feature[f] = ds->ds_feature_activation[f]; | |
241b5415 | 1996 | } |
f1512ee6 | 1997 | } |
13fe0198 MA |
1998 | } |
1999 | ||
0efd9791 AG |
2000 | static int |
2001 | deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) | |
2002 | { | |
2003 | dsl_deadlist_t *dl = arg; | |
2004 | dsl_deadlist_insert(dl, bp, tx); | |
2005 | return (0); | |
2006 | } | |
2007 | ||
2008 | void | |
2009 | dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx) | |
2010 | { | |
64fc7762 | 2011 | objset_t *os = ds->ds_objset; |
0efd9791 AG |
2012 | |
2013 | bplist_iterate(&ds->ds_pending_deadlist, | |
2014 | deadlist_enqueue_cb, &ds->ds_deadlist, tx); | |
2015 | ||
64fc7762 MA |
2016 | if (os->os_synced_dnodes != NULL) { |
2017 | multilist_destroy(os->os_synced_dnodes); | |
2018 | os->os_synced_dnodes = NULL; | |
2019 | } | |
2020 | ||
52ce99dd TC |
2021 | if (os->os_encrypted) |
2022 | os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_FALSE; | |
2023 | else | |
2024 | ASSERT0(os->os_next_write_raw[tx->tx_txg & TXG_MASK]); | |
2025 | ||
0efd9791 AG |
2026 | ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx))); |
2027 | ||
2028 | dmu_buf_rele(ds->ds_dbuf, ds); | |
2029 | } | |
2030 | ||
d99a0153 CW |
2031 | int |
2032 | get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val) | |
13fe0198 MA |
2033 | { |
2034 | uint64_t count = 0; | |
2035 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
2036 | zap_cursor_t zc; | |
2037 | zap_attribute_t za; | |
13fe0198 MA |
2038 | |
2039 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); | |
330d06f9 MA |
2040 | |
2041 | /* | |
13fe0198 | 2042 | * There may be missing entries in ds_next_clones_obj |
330d06f9 MA |
2043 | * due to a bug in a previous version of the code. |
2044 | * Only trust it if it has the right number of entries. | |
2045 | */ | |
d683ddbb JG |
2046 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
2047 | VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, | |
330d06f9 MA |
2048 | &count)); |
2049 | } | |
d99a0153 CW |
2050 | if (count != dsl_dataset_phys(ds)->ds_num_children - 1) { |
2051 | return (ENOENT); | |
2052 | } | |
d683ddbb JG |
2053 | for (zap_cursor_init(&zc, mos, |
2054 | dsl_dataset_phys(ds)->ds_next_clones_obj); | |
330d06f9 MA |
2055 | zap_cursor_retrieve(&zc, &za) == 0; |
2056 | zap_cursor_advance(&zc)) { | |
2057 | dsl_dataset_t *clone; | |
eca7b760 | 2058 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
2059 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, |
2060 | za.za_first_integer, FTAG, &clone)); | |
330d06f9 | 2061 | dsl_dir_name(clone->ds_dir, buf); |
13fe0198 | 2062 | fnvlist_add_boolean(val, buf); |
330d06f9 MA |
2063 | dsl_dataset_rele(clone, FTAG); |
2064 | } | |
2065 | zap_cursor_fini(&zc); | |
d99a0153 CW |
2066 | return (0); |
2067 | } | |
2068 | ||
2069 | void | |
2070 | get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) | |
2071 | { | |
2072 | nvlist_t *propval = fnvlist_alloc(); | |
2073 | nvlist_t *val; | |
2074 | ||
2075 | /* | |
2076 | * We use nvlist_alloc() instead of fnvlist_alloc() because the | |
2077 | * latter would allocate the list with NV_UNIQUE_NAME flag. | |
2078 | * As a result, every time a clone name is appended to the list | |
2079 | * it would be (linearly) searched for for a duplicate name. | |
2080 | * We already know that all clone names must be unique and we | |
2081 | * want avoid the quadratic complexity of double-checking that | |
2082 | * because we can have a large number of clones. | |
2083 | */ | |
2084 | VERIFY0(nvlist_alloc(&val, 0, KM_SLEEP)); | |
2085 | ||
2086 | if (get_clones_stat_impl(ds, val) == 0) { | |
2087 | fnvlist_add_nvlist(propval, ZPROP_VALUE, val); | |
2088 | fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), | |
2089 | propval); | |
2090 | } | |
2091 | ||
330d06f9 MA |
2092 | nvlist_free(val); |
2093 | nvlist_free(propval); | |
330d06f9 MA |
2094 | } |
2095 | ||
d99a0153 CW |
2096 | /* |
2097 | * Returns a string that represents the receive resume stats token. It should | |
2098 | * be freed with strfree(). | |
2099 | */ | |
2100 | char * | |
2101 | get_receive_resume_stats_impl(dsl_dataset_t *ds) | |
47dfff3b MA |
2102 | { |
2103 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2104 | ||
2105 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
2106 | char *str; | |
2107 | void *packed; | |
2108 | uint8_t *compressed; | |
2109 | uint64_t val; | |
2110 | nvlist_t *token_nv = fnvlist_alloc(); | |
2111 | size_t packed_size, compressed_size; | |
47dfff3b MA |
2112 | |
2113 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2114 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { | |
2115 | fnvlist_add_uint64(token_nv, "fromguid", val); | |
2116 | } | |
2117 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2118 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { | |
2119 | fnvlist_add_uint64(token_nv, "object", val); | |
2120 | } | |
2121 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2122 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { | |
2123 | fnvlist_add_uint64(token_nv, "offset", val); | |
2124 | } | |
2125 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2126 | DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { | |
2127 | fnvlist_add_uint64(token_nv, "bytes", val); | |
2128 | } | |
2129 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
2130 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { | |
2131 | fnvlist_add_uint64(token_nv, "toguid", val); | |
2132 | } | |
1c27024e | 2133 | char buf[MAXNAMELEN]; |
47dfff3b MA |
2134 | if (zap_lookup(dp->dp_meta_objset, ds->ds_object, |
2135 | DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { | |
2136 | fnvlist_add_string(token_nv, "toname", buf); | |
2137 | } | |
2aa34383 DK |
2138 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2139 | DS_FIELD_RESUME_LARGEBLOCK) == 0) { | |
2140 | fnvlist_add_boolean(token_nv, "largeblockok"); | |
2141 | } | |
47dfff3b MA |
2142 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2143 | DS_FIELD_RESUME_EMBEDOK) == 0) { | |
2144 | fnvlist_add_boolean(token_nv, "embedok"); | |
2145 | } | |
2aa34383 DK |
2146 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2147 | DS_FIELD_RESUME_COMPRESSOK) == 0) { | |
2148 | fnvlist_add_boolean(token_nv, "compressok"); | |
2149 | } | |
b5256303 TC |
2150 | if (zap_contains(dp->dp_meta_objset, ds->ds_object, |
2151 | DS_FIELD_RESUME_RAWOK) == 0) { | |
2152 | fnvlist_add_boolean(token_nv, "rawok"); | |
2153 | } | |
47dfff3b MA |
2154 | packed = fnvlist_pack(token_nv, &packed_size); |
2155 | fnvlist_free(token_nv); | |
2156 | compressed = kmem_alloc(packed_size, KM_SLEEP); | |
2157 | ||
2158 | compressed_size = gzip_compress(packed, compressed, | |
2159 | packed_size, packed_size, 6); | |
2160 | ||
1c27024e | 2161 | zio_cksum_t cksum; |
fc897b24 | 2162 | fletcher_4_native_varsize(compressed, compressed_size, &cksum); |
47dfff3b MA |
2163 | |
2164 | str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); | |
1c27024e | 2165 | for (int i = 0; i < compressed_size; i++) { |
47dfff3b MA |
2166 | (void) sprintf(str + i * 2, "%02x", compressed[i]); |
2167 | } | |
2168 | str[compressed_size * 2] = '\0'; | |
1c27024e | 2169 | char *propval = kmem_asprintf("%u-%llx-%llx-%s", |
47dfff3b MA |
2170 | ZFS_SEND_RESUME_TOKEN_VERSION, |
2171 | (longlong_t)cksum.zc_word[0], | |
2172 | (longlong_t)packed_size, str); | |
47dfff3b MA |
2173 | kmem_free(packed, packed_size); |
2174 | kmem_free(str, compressed_size * 2 + 1); | |
2175 | kmem_free(compressed, packed_size); | |
d99a0153 CW |
2176 | return (propval); |
2177 | } | |
2178 | return (strdup("")); | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * Returns a string that represents the receive resume stats token of the | |
2183 | * dataset's child. It should be freed with strfree(). | |
2184 | */ | |
2185 | char * | |
2186 | get_child_receive_stats(dsl_dataset_t *ds) | |
2187 | { | |
2188 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
2189 | dsl_dataset_t *recv_ds; | |
2190 | dsl_dataset_name(ds, recvname); | |
2191 | if (strlcat(recvname, "/", sizeof (recvname)) < | |
2192 | sizeof (recvname) && | |
2193 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
2194 | sizeof (recvname) && | |
2195 | dsl_dataset_hold(ds->ds_dir->dd_pool, recvname, FTAG, | |
2196 | &recv_ds) == 0) { | |
2197 | char *propval = get_receive_resume_stats_impl(recv_ds); | |
2198 | dsl_dataset_rele(recv_ds, FTAG); | |
2199 | return (propval); | |
47dfff3b | 2200 | } |
d99a0153 CW |
2201 | return (strdup("")); |
2202 | } | |
2203 | ||
2204 | static void | |
2205 | get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
2206 | { | |
2207 | char *propval = get_receive_resume_stats_impl(ds); | |
2208 | if (strcmp(propval, "") != 0) { | |
2209 | dsl_prop_nvlist_add_string(nv, | |
2210 | ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); | |
2211 | } else { | |
2212 | char *childval = get_child_receive_stats(ds); | |
2213 | if (strcmp(childval, "") != 0) { | |
2214 | dsl_prop_nvlist_add_string(nv, | |
2215 | ZFS_PROP_RECEIVE_RESUME_TOKEN, childval); | |
2216 | } | |
2217 | strfree(childval); | |
2218 | } | |
2219 | strfree(propval); | |
2220 | } | |
2221 | ||
2222 | uint64_t | |
2223 | dsl_get_refratio(dsl_dataset_t *ds) | |
2224 | { | |
2225 | uint64_t ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : | |
2226 | (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / | |
2227 | dsl_dataset_phys(ds)->ds_compressed_bytes); | |
2228 | return (ratio); | |
2229 | } | |
2230 | ||
2231 | uint64_t | |
2232 | dsl_get_logicalreferenced(dsl_dataset_t *ds) | |
2233 | { | |
2234 | return (dsl_dataset_phys(ds)->ds_uncompressed_bytes); | |
2235 | } | |
2236 | ||
2237 | uint64_t | |
2238 | dsl_get_compressratio(dsl_dataset_t *ds) | |
2239 | { | |
2240 | if (ds->ds_is_snapshot) { | |
2241 | return (dsl_get_refratio(ds)); | |
2242 | } else { | |
2243 | dsl_dir_t *dd = ds->ds_dir; | |
2244 | mutex_enter(&dd->dd_lock); | |
2245 | uint64_t val = dsl_dir_get_compressratio(dd); | |
2246 | mutex_exit(&dd->dd_lock); | |
2247 | return (val); | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | uint64_t | |
2252 | dsl_get_used(dsl_dataset_t *ds) | |
2253 | { | |
2254 | if (ds->ds_is_snapshot) { | |
2255 | return (dsl_dataset_phys(ds)->ds_unique_bytes); | |
2256 | } else { | |
2257 | dsl_dir_t *dd = ds->ds_dir; | |
2258 | mutex_enter(&dd->dd_lock); | |
2259 | uint64_t val = dsl_dir_get_used(dd); | |
2260 | mutex_exit(&dd->dd_lock); | |
2261 | return (val); | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | uint64_t | |
2266 | dsl_get_creation(dsl_dataset_t *ds) | |
2267 | { | |
2268 | return (dsl_dataset_phys(ds)->ds_creation_time); | |
2269 | } | |
2270 | ||
2271 | uint64_t | |
2272 | dsl_get_creationtxg(dsl_dataset_t *ds) | |
2273 | { | |
2274 | return (dsl_dataset_phys(ds)->ds_creation_txg); | |
2275 | } | |
2276 | ||
2277 | uint64_t | |
2278 | dsl_get_refquota(dsl_dataset_t *ds) | |
2279 | { | |
2280 | return (ds->ds_quota); | |
2281 | } | |
2282 | ||
2283 | uint64_t | |
2284 | dsl_get_refreservation(dsl_dataset_t *ds) | |
2285 | { | |
2286 | return (ds->ds_reserved); | |
2287 | } | |
2288 | ||
2289 | uint64_t | |
2290 | dsl_get_guid(dsl_dataset_t *ds) | |
2291 | { | |
2292 | return (dsl_dataset_phys(ds)->ds_guid); | |
2293 | } | |
2294 | ||
2295 | uint64_t | |
2296 | dsl_get_unique(dsl_dataset_t *ds) | |
2297 | { | |
2298 | return (dsl_dataset_phys(ds)->ds_unique_bytes); | |
2299 | } | |
2300 | ||
2301 | uint64_t | |
2302 | dsl_get_objsetid(dsl_dataset_t *ds) | |
2303 | { | |
2304 | return (ds->ds_object); | |
2305 | } | |
2306 | ||
2307 | uint64_t | |
2308 | dsl_get_userrefs(dsl_dataset_t *ds) | |
2309 | { | |
2310 | return (ds->ds_userrefs); | |
2311 | } | |
2312 | ||
2313 | uint64_t | |
2314 | dsl_get_defer_destroy(dsl_dataset_t *ds) | |
2315 | { | |
2316 | return (DS_IS_DEFER_DESTROY(ds) ? 1 : 0); | |
2317 | } | |
2318 | ||
2319 | uint64_t | |
2320 | dsl_get_referenced(dsl_dataset_t *ds) | |
2321 | { | |
2322 | return (dsl_dataset_phys(ds)->ds_referenced_bytes); | |
2323 | } | |
2324 | ||
2325 | uint64_t | |
2326 | dsl_get_numclones(dsl_dataset_t *ds) | |
2327 | { | |
2328 | ASSERT(ds->ds_is_snapshot); | |
2329 | return (dsl_dataset_phys(ds)->ds_num_children - 1); | |
2330 | } | |
2331 | ||
2332 | uint64_t | |
2333 | dsl_get_inconsistent(dsl_dataset_t *ds) | |
2334 | { | |
2335 | return ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) ? | |
2336 | 1 : 0); | |
2337 | } | |
2338 | ||
2339 | uint64_t | |
2340 | dsl_get_available(dsl_dataset_t *ds) | |
2341 | { | |
2342 | uint64_t refdbytes = dsl_get_referenced(ds); | |
2343 | uint64_t availbytes = dsl_dir_space_available(ds->ds_dir, | |
2344 | NULL, 0, TRUE); | |
2345 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { | |
2346 | availbytes += | |
2347 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
2348 | } | |
2349 | if (ds->ds_quota != 0) { | |
2350 | /* | |
2351 | * Adjust available bytes according to refquota | |
2352 | */ | |
2353 | if (refdbytes < ds->ds_quota) { | |
2354 | availbytes = MIN(availbytes, | |
2355 | ds->ds_quota - refdbytes); | |
2356 | } else { | |
2357 | availbytes = 0; | |
2358 | } | |
2359 | } | |
2360 | return (availbytes); | |
2361 | } | |
2362 | ||
2363 | int | |
2364 | dsl_get_written(dsl_dataset_t *ds, uint64_t *written) | |
2365 | { | |
2366 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2367 | dsl_dataset_t *prev; | |
2368 | int err = dsl_dataset_hold_obj(dp, | |
2369 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); | |
2370 | if (err == 0) { | |
2371 | uint64_t comp, uncomp; | |
2372 | err = dsl_dataset_space_written(prev, ds, written, | |
2373 | &comp, &uncomp); | |
2374 | dsl_dataset_rele(prev, FTAG); | |
2375 | } | |
2376 | return (err); | |
2377 | } | |
2378 | ||
2379 | /* | |
2380 | * 'snap' should be a buffer of size ZFS_MAX_DATASET_NAME_LEN. | |
2381 | */ | |
2382 | int | |
2383 | dsl_get_prev_snap(dsl_dataset_t *ds, char *snap) | |
2384 | { | |
2385 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2386 | if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { | |
2387 | dsl_dataset_name(ds->ds_prev, snap); | |
2388 | return (0); | |
2389 | } else { | |
2390 | return (ENOENT); | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | /* | |
2395 | * Returns the mountpoint property and source for the given dataset in the value | |
2396 | * and source buffers. The value buffer must be at least as large as MAXPATHLEN | |
2397 | * and the source buffer as least as large a ZFS_MAX_DATASET_NAME_LEN. | |
2398 | * Returns 0 on success and an error on failure. | |
2399 | */ | |
2400 | int | |
2401 | dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value, | |
2402 | char *source) | |
2403 | { | |
2404 | int error; | |
2405 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
2406 | ||
2407 | /* Retrieve the mountpoint value stored in the zap opbject */ | |
2408 | error = dsl_prop_get_ds(ds, zfs_prop_to_name(ZFS_PROP_MOUNTPOINT), 1, | |
2409 | ZAP_MAXVALUELEN, value, source); | |
2410 | if (error != 0) { | |
2411 | return (error); | |
2412 | } | |
2413 | ||
2414 | /* | |
2415 | * Process the dsname and source to find the full mountpoint string. | |
2416 | * Can be skipped for 'legacy' or 'none'. | |
2417 | */ | |
2418 | if (value[0] == '/') { | |
2419 | char *buf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP); | |
2420 | char *root = buf; | |
2421 | const char *relpath; | |
2422 | ||
2423 | /* | |
2424 | * If we inherit the mountpoint, even from a dataset | |
2425 | * with a received value, the source will be the path of | |
2426 | * the dataset we inherit from. If source is | |
2427 | * ZPROP_SOURCE_VAL_RECVD, the received value is not | |
2428 | * inherited. | |
2429 | */ | |
2430 | if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { | |
2431 | relpath = ""; | |
2432 | } else { | |
2433 | ASSERT0(strncmp(dsname, source, strlen(source))); | |
2434 | relpath = dsname + strlen(source); | |
2435 | if (relpath[0] == '/') | |
2436 | relpath++; | |
2437 | } | |
2438 | ||
2439 | spa_altroot(dp->dp_spa, root, ZAP_MAXVALUELEN); | |
2440 | ||
2441 | /* | |
2442 | * Special case an alternate root of '/'. This will | |
2443 | * avoid having multiple leading slashes in the | |
2444 | * mountpoint path. | |
2445 | */ | |
2446 | if (strcmp(root, "/") == 0) | |
2447 | root++; | |
2448 | ||
2449 | /* | |
2450 | * If the mountpoint is '/' then skip over this | |
2451 | * if we are obtaining either an alternate root or | |
2452 | * an inherited mountpoint. | |
2453 | */ | |
2454 | char *mnt = value; | |
2455 | if (value[1] == '\0' && (root[0] != '\0' || | |
2456 | relpath[0] != '\0')) | |
2457 | mnt = value + 1; | |
2458 | ||
2459 | if (relpath[0] == '\0') { | |
2460 | (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s", | |
2461 | root, mnt); | |
2462 | } else { | |
2463 | (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s%s%s", | |
2464 | root, mnt, relpath[0] == '@' ? "" : "/", | |
2465 | relpath); | |
2466 | } | |
2467 | kmem_free(buf, ZAP_MAXVALUELEN); | |
2468 | } | |
2469 | ||
2470 | return (0); | |
47dfff3b MA |
2471 | } |
2472 | ||
34dc7c2f BB |
2473 | void |
2474 | dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) | |
2475 | { | |
b858767a | 2476 | dsl_pool_t *dp = ds->ds_dir->dd_pool; |
13fe0198 MA |
2477 | |
2478 | ASSERT(dsl_pool_config_held(dp)); | |
34dc7c2f | 2479 | |
d99a0153 CW |
2480 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, |
2481 | dsl_get_refratio(ds)); | |
24a64651 | 2482 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, |
d99a0153 CW |
2483 | dsl_get_logicalreferenced(ds)); |
2484 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
2485 | dsl_get_compressratio(ds)); | |
2486 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, | |
2487 | dsl_get_used(ds)); | |
6f1ffb06 | 2488 | |
0c66c32d | 2489 | if (ds->ds_is_snapshot) { |
6f1ffb06 MA |
2490 | get_clones_stat(ds, nv); |
2491 | } else { | |
d99a0153 CW |
2492 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
2493 | if (dsl_get_prev_snap(ds, buf) == 0) | |
2494 | dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, | |
2495 | buf); | |
6f1ffb06 MA |
2496 | dsl_dir_stats(ds->ds_dir, nv); |
2497 | } | |
34dc7c2f | 2498 | |
d99a0153 CW |
2499 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, |
2500 | dsl_get_available(ds)); | |
2501 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, | |
2502 | dsl_get_referenced(ds)); | |
34dc7c2f | 2503 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
d99a0153 | 2504 | dsl_get_creation(ds)); |
34dc7c2f | 2505 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, |
d99a0153 | 2506 | dsl_get_creationtxg(ds)); |
34dc7c2f | 2507 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
d99a0153 | 2508 | dsl_get_refquota(ds)); |
34dc7c2f | 2509 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
d99a0153 | 2510 | dsl_get_refreservation(ds)); |
b128c09f | 2511 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
d99a0153 | 2512 | dsl_get_guid(ds)); |
428870ff | 2513 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, |
d99a0153 | 2514 | dsl_get_unique(ds)); |
428870ff | 2515 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, |
d99a0153 | 2516 | dsl_get_objsetid(ds)); |
428870ff | 2517 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, |
d99a0153 | 2518 | dsl_get_userrefs(ds)); |
45d1cae3 | 2519 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, |
d99a0153 | 2520 | dsl_get_defer_destroy(ds)); |
b5256303 | 2521 | dsl_dataset_crypt_stats(ds, nv); |
34dc7c2f | 2522 | |
d683ddbb | 2523 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
d99a0153 CW |
2524 | uint64_t written; |
2525 | if (dsl_get_written(ds, &written) == 0) { | |
2526 | dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, | |
2527 | written); | |
330d06f9 MA |
2528 | } |
2529 | } | |
2530 | ||
47dfff3b | 2531 | if (!dsl_dataset_is_snapshot(ds)) { |
47dfff3b MA |
2532 | /* |
2533 | * A failed "newfs" (e.g. full) resumable receive leaves | |
2534 | * the stats set on this dataset. Check here for the prop. | |
2535 | */ | |
2536 | get_receive_resume_stats(ds, nv); | |
2537 | ||
2538 | /* | |
2539 | * A failed incremental resumable receive leaves the | |
2540 | * stats set on our child named "%recv". Check the child | |
2541 | * for the prop. | |
2542 | */ | |
1c27024e DB |
2543 | /* 6 extra bytes for /%recv */ |
2544 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
2545 | dsl_dataset_t *recv_ds; | |
47dfff3b | 2546 | dsl_dataset_name(ds, recvname); |
eca7b760 IK |
2547 | if (strlcat(recvname, "/", sizeof (recvname)) < |
2548 | sizeof (recvname) && | |
2549 | strlcat(recvname, recv_clone_name, sizeof (recvname)) < | |
2550 | sizeof (recvname) && | |
2551 | dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { | |
47dfff3b MA |
2552 | get_receive_resume_stats(recv_ds, nv); |
2553 | dsl_dataset_rele(recv_ds, FTAG); | |
2554 | } | |
2555 | } | |
34dc7c2f BB |
2556 | } |
2557 | ||
2558 | void | |
2559 | dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
2560 | { | |
d99a0153 | 2561 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
13fe0198 MA |
2562 | ASSERT(dsl_pool_config_held(dp)); |
2563 | ||
d99a0153 CW |
2564 | stat->dds_creation_txg = dsl_get_creationtxg(ds); |
2565 | stat->dds_inconsistent = dsl_get_inconsistent(ds); | |
2566 | stat->dds_guid = dsl_get_guid(ds); | |
6f1ffb06 | 2567 | stat->dds_origin[0] = '\0'; |
0c66c32d | 2568 | if (ds->ds_is_snapshot) { |
34dc7c2f | 2569 | stat->dds_is_snapshot = B_TRUE; |
d99a0153 | 2570 | stat->dds_num_clones = dsl_get_numclones(ds); |
fb5f0bc8 BB |
2571 | } else { |
2572 | stat->dds_is_snapshot = B_FALSE; | |
2573 | stat->dds_num_clones = 0; | |
34dc7c2f | 2574 | |
6f1ffb06 | 2575 | if (dsl_dir_is_clone(ds->ds_dir)) { |
d99a0153 | 2576 | dsl_dir_get_origin(ds->ds_dir, stat->dds_origin); |
6f1ffb06 | 2577 | } |
34dc7c2f | 2578 | } |
34dc7c2f BB |
2579 | } |
2580 | ||
2581 | uint64_t | |
2582 | dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
2583 | { | |
2584 | return (ds->ds_fsid_guid); | |
2585 | } | |
2586 | ||
2587 | void | |
2588 | dsl_dataset_space(dsl_dataset_t *ds, | |
2589 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
2590 | uint64_t *usedobjsp, uint64_t *availobjsp) | |
2591 | { | |
d683ddbb | 2592 | *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; |
34dc7c2f | 2593 | *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); |
d683ddbb JG |
2594 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) |
2595 | *availbytesp += | |
2596 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; | |
34dc7c2f BB |
2597 | if (ds->ds_quota != 0) { |
2598 | /* | |
2599 | * Adjust available bytes according to refquota | |
2600 | */ | |
2601 | if (*refdbytesp < ds->ds_quota) | |
2602 | *availbytesp = MIN(*availbytesp, | |
2603 | ds->ds_quota - *refdbytesp); | |
2604 | else | |
2605 | *availbytesp = 0; | |
2606 | } | |
cc9bb3e5 | 2607 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 2608 | *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); |
cc9bb3e5 | 2609 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
34dc7c2f BB |
2610 | *availobjsp = DN_MAX_OBJECT - *usedobjsp; |
2611 | } | |
2612 | ||
2613 | boolean_t | |
19580676 | 2614 | dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) |
34dc7c2f | 2615 | { |
cc9bb3e5 GM |
2616 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
2617 | uint64_t birth; | |
2618 | ||
2619 | ASSERT(dsl_pool_config_held(dp)); | |
19580676 | 2620 | if (snap == NULL) |
34dc7c2f | 2621 | return (B_FALSE); |
cc9bb3e5 GM |
2622 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
2623 | birth = dsl_dataset_get_blkptr(ds)->blk_birth; | |
2624 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
2625 | if (birth > dsl_dataset_phys(snap)->ds_creation_txg) { | |
19580676 | 2626 | objset_t *os, *os_snap; |
572e2857 BB |
2627 | /* |
2628 | * It may be that only the ZIL differs, because it was | |
2629 | * reset in the head. Don't count that as being | |
2630 | * modified. | |
2631 | */ | |
2632 | if (dmu_objset_from_ds(ds, &os) != 0) | |
2633 | return (B_TRUE); | |
19580676 | 2634 | if (dmu_objset_from_ds(snap, &os_snap) != 0) |
572e2857 BB |
2635 | return (B_TRUE); |
2636 | return (bcmp(&os->os_phys->os_meta_dnode, | |
19580676 | 2637 | &os_snap->os_phys->os_meta_dnode, |
572e2857 BB |
2638 | sizeof (os->os_phys->os_meta_dnode)) != 0); |
2639 | } | |
34dc7c2f BB |
2640 | return (B_FALSE); |
2641 | } | |
2642 | ||
13fe0198 MA |
2643 | typedef struct dsl_dataset_rename_snapshot_arg { |
2644 | const char *ddrsa_fsname; | |
2645 | const char *ddrsa_oldsnapname; | |
2646 | const char *ddrsa_newsnapname; | |
2647 | boolean_t ddrsa_recursive; | |
2648 | dmu_tx_t *ddrsa_tx; | |
2649 | } dsl_dataset_rename_snapshot_arg_t; | |
2650 | ||
34dc7c2f BB |
2651 | /* ARGSUSED */ |
2652 | static int | |
13fe0198 MA |
2653 | dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, |
2654 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2655 | { |
13fe0198 MA |
2656 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2657 | int error; | |
34dc7c2f | 2658 | uint64_t val; |
34dc7c2f | 2659 | |
13fe0198 MA |
2660 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2661 | if (error != 0) { | |
2662 | /* ignore nonexistent snapshots */ | |
2663 | return (error == ENOENT ? 0 : error); | |
2664 | } | |
34dc7c2f | 2665 | |
13fe0198 MA |
2666 | /* new name should not exist */ |
2667 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); | |
2668 | if (error == 0) | |
2e528b49 | 2669 | error = SET_ERROR(EEXIST); |
13fe0198 MA |
2670 | else if (error == ENOENT) |
2671 | error = 0; | |
34dc7c2f BB |
2672 | |
2673 | /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
13fe0198 | 2674 | if (dsl_dir_namelen(hds->ds_dir) + 1 + |
eca7b760 | 2675 | strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) |
2e528b49 | 2676 | error = SET_ERROR(ENAMETOOLONG); |
34dc7c2f | 2677 | |
13fe0198 | 2678 | return (error); |
34dc7c2f BB |
2679 | } |
2680 | ||
13fe0198 MA |
2681 | static int |
2682 | dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2683 | { |
13fe0198 MA |
2684 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2685 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
34dc7c2f | 2686 | dsl_dataset_t *hds; |
13fe0198 | 2687 | int error; |
34dc7c2f | 2688 | |
13fe0198 MA |
2689 | error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); |
2690 | if (error != 0) | |
2691 | return (error); | |
34dc7c2f | 2692 | |
13fe0198 MA |
2693 | if (ddrsa->ddrsa_recursive) { |
2694 | error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2695 | dsl_dataset_rename_snapshot_check_impl, ddrsa, | |
2696 | DS_FIND_CHILDREN); | |
2697 | } else { | |
2698 | error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); | |
2699 | } | |
b128c09f | 2700 | dsl_dataset_rele(hds, FTAG); |
13fe0198 | 2701 | return (error); |
34dc7c2f BB |
2702 | } |
2703 | ||
34dc7c2f | 2704 | static int |
13fe0198 MA |
2705 | dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, |
2706 | dsl_dataset_t *hds, void *arg) | |
34dc7c2f | 2707 | { |
13fe0198 MA |
2708 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2709 | dsl_dataset_t *ds; | |
2710 | uint64_t val; | |
2711 | dmu_tx_t *tx = ddrsa->ddrsa_tx; | |
2712 | int error; | |
34dc7c2f | 2713 | |
13fe0198 MA |
2714 | error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); |
2715 | ASSERT(error == 0 || error == ENOENT); | |
2716 | if (error == ENOENT) { | |
2717 | /* ignore nonexistent snapshots */ | |
2718 | return (0); | |
34dc7c2f BB |
2719 | } |
2720 | ||
13fe0198 MA |
2721 | VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); |
2722 | ||
2723 | /* log before we change the name */ | |
2724 | spa_history_log_internal_ds(ds, "rename", tx, | |
2725 | "-> @%s", ddrsa->ddrsa_newsnapname); | |
34dc7c2f | 2726 | |
788eb90c JJ |
2727 | VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, |
2728 | B_FALSE)); | |
13fe0198 | 2729 | mutex_enter(&ds->ds_lock); |
c9d61adb | 2730 | (void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname, |
2731 | sizeof (ds->ds_snapname)); | |
13fe0198 | 2732 | mutex_exit(&ds->ds_lock); |
d683ddbb JG |
2733 | VERIFY0(zap_add(dp->dp_meta_objset, |
2734 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, | |
13fe0198 | 2735 | ds->ds_snapname, 8, 1, &ds->ds_object, tx)); |
a0bd735a BP |
2736 | zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname, |
2737 | ddrsa->ddrsa_newsnapname, B_TRUE); | |
34dc7c2f | 2738 | |
13fe0198 | 2739 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
2740 | return (0); |
2741 | } | |
2742 | ||
13fe0198 MA |
2743 | static void |
2744 | dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) | |
34dc7c2f | 2745 | { |
13fe0198 MA |
2746 | dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; |
2747 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 2748 | dsl_dataset_t *hds = NULL; |
34dc7c2f | 2749 | |
13fe0198 MA |
2750 | VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); |
2751 | ddrsa->ddrsa_tx = tx; | |
2752 | if (ddrsa->ddrsa_recursive) { | |
2753 | VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, | |
2754 | dsl_dataset_rename_snapshot_sync_impl, ddrsa, | |
2755 | DS_FIND_CHILDREN)); | |
2756 | } else { | |
2757 | VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); | |
34dc7c2f | 2758 | } |
13fe0198 | 2759 | dsl_dataset_rele(hds, FTAG); |
34dc7c2f BB |
2760 | } |
2761 | ||
13fe0198 MA |
2762 | int |
2763 | dsl_dataset_rename_snapshot(const char *fsname, | |
2764 | const char *oldsnapname, const char *newsnapname, boolean_t recursive) | |
34dc7c2f | 2765 | { |
13fe0198 | 2766 | dsl_dataset_rename_snapshot_arg_t ddrsa; |
34dc7c2f | 2767 | |
13fe0198 MA |
2768 | ddrsa.ddrsa_fsname = fsname; |
2769 | ddrsa.ddrsa_oldsnapname = oldsnapname; | |
2770 | ddrsa.ddrsa_newsnapname = newsnapname; | |
2771 | ddrsa.ddrsa_recursive = recursive; | |
34dc7c2f | 2772 | |
a0bd735a | 2773 | return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, |
3d45fdd6 | 2774 | dsl_dataset_rename_snapshot_sync, &ddrsa, |
a0bd735a | 2775 | 1, ZFS_SPACE_CHECK_RESERVED)); |
34dc7c2f BB |
2776 | } |
2777 | ||
831baf06 KW |
2778 | /* |
2779 | * If we're doing an ownership handoff, we need to make sure that there is | |
2780 | * only one long hold on the dataset. We're not allowed to change anything here | |
2781 | * so we don't permanently release the long hold or regular hold here. We want | |
2782 | * to do this only when syncing to avoid the dataset unexpectedly going away | |
040dab99 | 2783 | * when we release the long hold. |
831baf06 KW |
2784 | */ |
2785 | static int | |
2786 | dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) | |
2787 | { | |
2788 | boolean_t held; | |
2789 | ||
2790 | if (!dmu_tx_is_syncing(tx)) | |
2791 | return (0); | |
2792 | ||
2793 | if (owner != NULL) { | |
2794 | VERIFY3P(ds->ds_owner, ==, owner); | |
2795 | dsl_dataset_long_rele(ds, owner); | |
2796 | } | |
2797 | ||
040dab99 | 2798 | held = dsl_dataset_long_held(ds); |
831baf06 KW |
2799 | |
2800 | if (owner != NULL) | |
2801 | dsl_dataset_long_hold(ds, owner); | |
2802 | ||
2803 | if (held) | |
2804 | return (SET_ERROR(EBUSY)); | |
2805 | ||
2806 | return (0); | |
2807 | } | |
2808 | ||
af073689 | 2809 | int |
13fe0198 | 2810 | dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2811 | { |
831baf06 | 2812 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 | 2813 | dsl_pool_t *dp = dmu_tx_pool(tx); |
34dc7c2f | 2814 | dsl_dataset_t *ds; |
13fe0198 MA |
2815 | int64_t unused_refres_delta; |
2816 | int error; | |
34dc7c2f | 2817 | |
831baf06 | 2818 | error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); |
13fe0198 MA |
2819 | if (error != 0) |
2820 | return (error); | |
428870ff | 2821 | |
13fe0198 | 2822 | /* must not be a snapshot */ |
0c66c32d | 2823 | if (ds->ds_is_snapshot) { |
13fe0198 | 2824 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2825 | return (SET_ERROR(EINVAL)); |
13fe0198 | 2826 | } |
34dc7c2f | 2827 | |
13fe0198 | 2828 | /* must have a most recent snapshot */ |
d683ddbb | 2829 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { |
13fe0198 | 2830 | dsl_dataset_rele(ds, FTAG); |
13342832 | 2831 | return (SET_ERROR(ESRCH)); |
13fe0198 | 2832 | } |
34dc7c2f | 2833 | |
0efd9791 AG |
2834 | /* |
2835 | * No rollback to a snapshot created in the current txg, because | |
2836 | * the rollback may dirty the dataset and create blocks that are | |
2837 | * not reachable from the rootbp while having a birth txg that | |
2838 | * falls into the snapshot's range. | |
2839 | */ | |
2840 | if (dmu_tx_is_syncing(tx) && | |
2841 | dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) { | |
2842 | dsl_dataset_rele(ds, FTAG); | |
2843 | return (SET_ERROR(EAGAIN)); | |
2844 | } | |
2845 | ||
8ca78ab0 AG |
2846 | /* |
2847 | * If the expected target snapshot is specified, then check that | |
2848 | * the latest snapshot is it. | |
2849 | */ | |
2850 | if (ddra->ddra_tosnap != NULL) { | |
13342832 AG |
2851 | dsl_dataset_t *snapds; |
2852 | ||
2853 | /* Check if the target snapshot exists at all. */ | |
2854 | error = dsl_dataset_hold(dp, ddra->ddra_tosnap, FTAG, &snapds); | |
2855 | if (error != 0) { | |
2856 | /* | |
2857 | * ESRCH is used to signal that the target snapshot does | |
2858 | * not exist, while ENOENT is used to report that | |
2859 | * the rolled back dataset does not exist. | |
2860 | * ESRCH is also used to cover other cases where the | |
2861 | * target snapshot is not related to the dataset being | |
2862 | * rolled back such as being in a different pool. | |
2863 | */ | |
2864 | if (error == ENOENT || error == EXDEV) | |
2865 | error = SET_ERROR(ESRCH); | |
2866 | dsl_dataset_rele(ds, FTAG); | |
2867 | return (error); | |
2868 | } | |
2869 | ASSERT(snapds->ds_is_snapshot); | |
8ca78ab0 | 2870 | |
13342832 AG |
2871 | /* Check if the snapshot is the latest snapshot indeed. */ |
2872 | if (snapds != ds->ds_prev) { | |
2873 | /* | |
2874 | * Distinguish between the case where the only problem | |
2875 | * is intervening snapshots (EEXIST) vs the snapshot | |
2876 | * not being a valid target for rollback (ESRCH). | |
2877 | */ | |
2878 | if (snapds->ds_dir == ds->ds_dir || | |
2879 | (dsl_dir_is_clone(ds->ds_dir) && | |
2880 | dsl_dir_phys(ds->ds_dir)->dd_origin_obj == | |
2881 | snapds->ds_object)) { | |
2882 | error = SET_ERROR(EEXIST); | |
2883 | } else { | |
2884 | error = SET_ERROR(ESRCH); | |
2885 | } | |
2886 | dsl_dataset_rele(snapds, FTAG); | |
2887 | dsl_dataset_rele(ds, FTAG); | |
2888 | return (error); | |
2889 | } | |
2890 | dsl_dataset_rele(snapds, FTAG); | |
8ca78ab0 AG |
2891 | } |
2892 | ||
da536844 | 2893 | /* must not have any bookmarks after the most recent snapshot */ |
1c27024e | 2894 | nvlist_t *proprequest = fnvlist_alloc(); |
da536844 | 2895 | fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); |
1c27024e | 2896 | nvlist_t *bookmarks = fnvlist_alloc(); |
da536844 MA |
2897 | error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); |
2898 | fnvlist_free(proprequest); | |
13342832 AG |
2899 | if (error != 0) { |
2900 | dsl_dataset_rele(ds, FTAG); | |
da536844 | 2901 | return (error); |
13342832 | 2902 | } |
1c27024e | 2903 | for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); |
da536844 MA |
2904 | pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { |
2905 | nvlist_t *valuenv = | |
2906 | fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), | |
2907 | zfs_prop_to_name(ZFS_PROP_CREATETXG)); | |
2908 | uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); | |
d683ddbb | 2909 | if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { |
da536844 MA |
2910 | fnvlist_free(bookmarks); |
2911 | dsl_dataset_rele(ds, FTAG); | |
2912 | return (SET_ERROR(EEXIST)); | |
2913 | } | |
2914 | } | |
2915 | fnvlist_free(bookmarks); | |
2916 | ||
831baf06 KW |
2917 | error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); |
2918 | if (error != 0) { | |
13fe0198 | 2919 | dsl_dataset_rele(ds, FTAG); |
831baf06 | 2920 | return (error); |
34dc7c2f | 2921 | } |
428870ff | 2922 | |
13fe0198 MA |
2923 | /* |
2924 | * Check if the snap we are rolling back to uses more than | |
2925 | * the refquota. | |
2926 | */ | |
2927 | if (ds->ds_quota != 0 && | |
d683ddbb | 2928 | dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { |
13fe0198 | 2929 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 2930 | return (SET_ERROR(EDQUOT)); |
34dc7c2f BB |
2931 | } |
2932 | ||
13fe0198 MA |
2933 | /* |
2934 | * When we do the clone swap, we will temporarily use more space | |
2935 | * due to the refreservation (the head will no longer have any | |
2936 | * unique space, so the entire amount of the refreservation will need | |
2937 | * to be free). We will immediately destroy the clone, freeing | |
2938 | * this space, but the freeing happens over many txg's. | |
2939 | */ | |
2940 | unused_refres_delta = (int64_t)MIN(ds->ds_reserved, | |
d683ddbb | 2941 | dsl_dataset_phys(ds)->ds_unique_bytes); |
34dc7c2f | 2942 | |
13fe0198 MA |
2943 | if (unused_refres_delta > 0 && |
2944 | unused_refres_delta > | |
2945 | dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { | |
2946 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 2947 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 2948 | } |
34dc7c2f | 2949 | |
13fe0198 MA |
2950 | dsl_dataset_rele(ds, FTAG); |
2951 | return (0); | |
2952 | } | |
34dc7c2f | 2953 | |
af073689 | 2954 | void |
13fe0198 MA |
2955 | dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) |
2956 | { | |
831baf06 | 2957 | dsl_dataset_rollback_arg_t *ddra = arg; |
13fe0198 MA |
2958 | dsl_pool_t *dp = dmu_tx_pool(tx); |
2959 | dsl_dataset_t *ds, *clone; | |
2960 | uint64_t cloneobj; | |
eca7b760 | 2961 | char namebuf[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 2962 | |
831baf06 | 2963 | VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); |
34dc7c2f | 2964 | |
46ba1e59 MA |
2965 | dsl_dataset_name(ds->ds_prev, namebuf); |
2966 | fnvlist_add_string(ddra->ddra_result, "target", namebuf); | |
2967 | ||
13fe0198 | 2968 | cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", |
b5256303 | 2969 | ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, NULL, tx); |
13fe0198 MA |
2970 | |
2971 | VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); | |
2972 | ||
2973 | dsl_dataset_clone_swap_sync_impl(clone, ds, tx); | |
2974 | dsl_dataset_zero_zil(ds, tx); | |
2975 | ||
2976 | dsl_destroy_head_sync_impl(clone, tx); | |
2977 | ||
2978 | dsl_dataset_rele(clone, FTAG); | |
2979 | dsl_dataset_rele(ds, FTAG); | |
2980 | } | |
2981 | ||
831baf06 | 2982 | /* |
46ba1e59 MA |
2983 | * Rolls back the given filesystem or volume to the most recent snapshot. |
2984 | * The name of the most recent snapshot will be returned under key "target" | |
2985 | * in the result nvlist. | |
831baf06 | 2986 | * |
46ba1e59 | 2987 | * If owner != NULL: |
831baf06 KW |
2988 | * - The existing dataset MUST be owned by the specified owner at entry |
2989 | * - Upon return, dataset will still be held by the same owner, whether we | |
2990 | * succeed or not. | |
2991 | * | |
2992 | * This mode is required any time the existing filesystem is mounted. See | |
2993 | * notes above zfs_suspend_fs() for further details. | |
2994 | */ | |
13fe0198 | 2995 | int |
8ca78ab0 AG |
2996 | dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, |
2997 | nvlist_t *result) | |
13fe0198 | 2998 | { |
831baf06 KW |
2999 | dsl_dataset_rollback_arg_t ddra; |
3000 | ||
3001 | ddra.ddra_fsname = fsname; | |
8ca78ab0 | 3002 | ddra.ddra_tosnap = tosnap; |
831baf06 | 3003 | ddra.ddra_owner = owner; |
46ba1e59 | 3004 | ddra.ddra_result = result; |
831baf06 | 3005 | |
13fe0198 | 3006 | return (dsl_sync_task(fsname, dsl_dataset_rollback_check, |
3d45fdd6 MA |
3007 | dsl_dataset_rollback_sync, &ddra, |
3008 | 1, ZFS_SPACE_CHECK_RESERVED)); | |
34dc7c2f BB |
3009 | } |
3010 | ||
b128c09f BB |
3011 | struct promotenode { |
3012 | list_node_t link; | |
3013 | dsl_dataset_t *ds; | |
3014 | }; | |
3015 | ||
b128c09f | 3016 | static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); |
13fe0198 MA |
3017 | static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, |
3018 | void *tag); | |
3019 | static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); | |
b128c09f | 3020 | |
d99a0153 | 3021 | int |
13fe0198 | 3022 | dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3023 | { |
13fe0198 MA |
3024 | dsl_dataset_promote_arg_t *ddpa = arg; |
3025 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3026 | dsl_dataset_t *hds; | |
3027 | struct promotenode *snap; | |
3028 | dsl_dataset_t *origin_ds; | |
34dc7c2f | 3029 | int err; |
428870ff | 3030 | uint64_t unused; |
788eb90c | 3031 | uint64_t ss_mv_cnt; |
fec41709 | 3032 | size_t max_snap_len; |
d99a0153 | 3033 | boolean_t conflicting_snaps; |
34dc7c2f | 3034 | |
13fe0198 MA |
3035 | err = promote_hold(ddpa, dp, FTAG); |
3036 | if (err != 0) | |
3037 | return (err); | |
34dc7c2f | 3038 | |
13fe0198 | 3039 | hds = ddpa->ddpa_clone; |
fec41709 | 3040 | max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; |
34dc7c2f | 3041 | |
d683ddbb | 3042 | if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { |
13fe0198 | 3043 | promote_rele(ddpa, FTAG); |
2e528b49 | 3044 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
3045 | } |
3046 | ||
b5256303 TC |
3047 | snap = list_head(&ddpa->shared_snaps); |
3048 | if (snap == NULL) { | |
3049 | err = SET_ERROR(ENOENT); | |
3050 | goto out; | |
3051 | } | |
3052 | origin_ds = snap->ds; | |
3053 | ||
3054 | /* | |
3055 | * Encrypted clones share a DSL Crypto Key with their origin's dsl dir. | |
3056 | * When doing a promote we must make sure the encryption root for | |
3057 | * both the target and the target's origin does not change to avoid | |
3058 | * needing to rewrap encryption keys | |
3059 | */ | |
3060 | err = dsl_dataset_promote_crypt_check(hds->ds_dir, origin_ds->ds_dir); | |
3061 | if (err != 0) | |
3062 | goto out; | |
3063 | ||
13fe0198 MA |
3064 | /* |
3065 | * Compute and check the amount of space to transfer. Since this is | |
3066 | * so expensive, don't do the preliminary check. | |
3067 | */ | |
3068 | if (!dmu_tx_is_syncing(tx)) { | |
3069 | promote_rele(ddpa, FTAG); | |
3070 | return (0); | |
3071 | } | |
3072 | ||
34dc7c2f | 3073 | /* compute origin's new unique space */ |
13fe0198 | 3074 | snap = list_tail(&ddpa->clone_snaps); |
cbce5813 | 3075 | ASSERT(snap != NULL); |
d683ddbb JG |
3076 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
3077 | origin_ds->ds_object); | |
428870ff | 3078 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, |
d683ddbb | 3079 | dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 | 3080 | &ddpa->unique, &unused, &unused); |
34dc7c2f | 3081 | |
b128c09f BB |
3082 | /* |
3083 | * Walk the snapshots that we are moving | |
3084 | * | |
3085 | * Compute space to transfer. Consider the incremental changes | |
13fe0198 | 3086 | * to used by each snapshot: |
b128c09f BB |
3087 | * (my used) = (prev's used) + (blocks born) - (blocks killed) |
3088 | * So each snapshot gave birth to: | |
3089 | * (blocks born) = (my used) - (prev's used) + (blocks killed) | |
3090 | * So a sequence would look like: | |
3091 | * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) | |
3092 | * Which simplifies to: | |
3093 | * uN + kN + kN-1 + ... + k1 + k0 | |
3094 | * Note however, if we stop before we reach the ORIGIN we get: | |
3095 | * uN + kN + kN-1 + ... + kM - uM-1 | |
3096 | */ | |
d99a0153 | 3097 | conflicting_snaps = B_FALSE; |
788eb90c | 3098 | ss_mv_cnt = 0; |
d683ddbb JG |
3099 | ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; |
3100 | ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; | |
3101 | ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; | |
13fe0198 MA |
3102 | for (snap = list_head(&ddpa->shared_snaps); snap; |
3103 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
34dc7c2f | 3104 | uint64_t val, dlused, dlcomp, dluncomp; |
b128c09f | 3105 | dsl_dataset_t *ds = snap->ds; |
34dc7c2f | 3106 | |
788eb90c JJ |
3107 | ss_mv_cnt++; |
3108 | ||
13fe0198 MA |
3109 | /* |
3110 | * If there are long holds, we won't be able to evict | |
3111 | * the objset. | |
3112 | */ | |
3113 | if (dsl_dataset_long_held(ds)) { | |
2e528b49 | 3114 | err = SET_ERROR(EBUSY); |
13fe0198 MA |
3115 | goto out; |
3116 | } | |
3117 | ||
34dc7c2f | 3118 | /* Check that the snapshot name does not conflict */ |
13fe0198 | 3119 | VERIFY0(dsl_dataset_get_snapname(ds)); |
fec41709 AG |
3120 | if (strlen(ds->ds_snapname) >= max_snap_len) { |
3121 | err = SET_ERROR(ENAMETOOLONG); | |
3122 | goto out; | |
3123 | } | |
b128c09f | 3124 | err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
428870ff | 3125 | if (err == 0) { |
d99a0153 CW |
3126 | fnvlist_add_boolean(ddpa->err_ds, |
3127 | snap->ds->ds_snapname); | |
3128 | conflicting_snaps = B_TRUE; | |
3129 | } else if (err != ENOENT) { | |
428870ff BB |
3130 | goto out; |
3131 | } | |
34dc7c2f | 3132 | |
b128c09f | 3133 | /* The very first snapshot does not have a deadlist */ |
d683ddbb | 3134 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) |
b128c09f | 3135 | continue; |
34dc7c2f | 3136 | |
428870ff BB |
3137 | dsl_deadlist_space(&ds->ds_deadlist, |
3138 | &dlused, &dlcomp, &dluncomp); | |
13fe0198 MA |
3139 | ddpa->used += dlused; |
3140 | ddpa->comp += dlcomp; | |
3141 | ddpa->uncomp += dluncomp; | |
b128c09f | 3142 | } |
34dc7c2f | 3143 | |
d99a0153 CW |
3144 | /* |
3145 | * In order to return the full list of conflicting snapshots, we check | |
3146 | * whether there was a conflict after traversing all of them. | |
3147 | */ | |
3148 | if (conflicting_snaps) { | |
3149 | err = SET_ERROR(EEXIST); | |
3150 | goto out; | |
3151 | } | |
3152 | ||
b128c09f BB |
3153 | /* |
3154 | * If we are a clone of a clone then we never reached ORIGIN, | |
3155 | * so we need to subtract out the clone origin's used space. | |
3156 | */ | |
13fe0198 | 3157 | if (ddpa->origin_origin) { |
d683ddbb JG |
3158 | ddpa->used -= |
3159 | dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; | |
3160 | ddpa->comp -= | |
3161 | dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; | |
13fe0198 | 3162 | ddpa->uncomp -= |
d683ddbb JG |
3163 | dsl_dataset_phys(ddpa->origin_origin)-> |
3164 | ds_uncompressed_bytes; | |
34dc7c2f BB |
3165 | } |
3166 | ||
788eb90c | 3167 | /* Check that there is enough space and limit headroom here */ |
b128c09f | 3168 | err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, |
788eb90c | 3169 | 0, ss_mv_cnt, ddpa->used, ddpa->cr); |
13fe0198 MA |
3170 | if (err != 0) |
3171 | goto out; | |
34dc7c2f | 3172 | |
b128c09f BB |
3173 | /* |
3174 | * Compute the amounts of space that will be used by snapshots | |
3175 | * after the promotion (for both origin and clone). For each, | |
3176 | * it is the amount of space that will be on all of their | |
3177 | * deadlists (that was not born before their new origin). | |
3178 | */ | |
d683ddbb | 3179 | if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { |
b128c09f BB |
3180 | uint64_t space; |
3181 | ||
3182 | /* | |
3183 | * Note, typically this will not be a clone of a clone, | |
428870ff BB |
3184 | * so dd_origin_txg will be < TXG_INITIAL, so |
3185 | * these snaplist_space() -> dsl_deadlist_space_range() | |
b128c09f BB |
3186 | * calls will be fast because they do not have to |
3187 | * iterate over all bps. | |
3188 | */ | |
13fe0198 | 3189 | snap = list_head(&ddpa->origin_snaps); |
0a8f18f9 | 3190 | if (snap == NULL) { |
3191 | err = SET_ERROR(ENOENT); | |
3192 | goto out; | |
3193 | } | |
13fe0198 MA |
3194 | err = snaplist_space(&ddpa->shared_snaps, |
3195 | snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); | |
3196 | if (err != 0) | |
3197 | goto out; | |
b128c09f | 3198 | |
13fe0198 | 3199 | err = snaplist_space(&ddpa->clone_snaps, |
428870ff | 3200 | snap->ds->ds_dir->dd_origin_txg, &space); |
13fe0198 MA |
3201 | if (err != 0) |
3202 | goto out; | |
3203 | ddpa->cloneusedsnap += space; | |
b128c09f | 3204 | } |
d683ddbb JG |
3205 | if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & |
3206 | DD_FLAG_USED_BREAKDOWN) { | |
13fe0198 | 3207 | err = snaplist_space(&ddpa->origin_snaps, |
d683ddbb JG |
3208 | dsl_dataset_phys(origin_ds)->ds_creation_txg, |
3209 | &ddpa->originusedsnap); | |
13fe0198 MA |
3210 | if (err != 0) |
3211 | goto out; | |
b128c09f BB |
3212 | } |
3213 | ||
428870ff | 3214 | out: |
13fe0198 | 3215 | promote_rele(ddpa, FTAG); |
428870ff | 3216 | return (err); |
34dc7c2f BB |
3217 | } |
3218 | ||
d99a0153 | 3219 | void |
13fe0198 | 3220 | dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3221 | { |
13fe0198 MA |
3222 | dsl_dataset_promote_arg_t *ddpa = arg; |
3223 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3224 | dsl_dataset_t *hds; | |
3225 | struct promotenode *snap; | |
3226 | dsl_dataset_t *origin_ds; | |
b128c09f | 3227 | dsl_dataset_t *origin_head; |
13fe0198 | 3228 | dsl_dir_t *dd; |
34dc7c2f | 3229 | dsl_dir_t *odd = NULL; |
b128c09f BB |
3230 | uint64_t oldnext_obj; |
3231 | int64_t delta; | |
34dc7c2f | 3232 | |
13fe0198 MA |
3233 | VERIFY0(promote_hold(ddpa, dp, FTAG)); |
3234 | hds = ddpa->ddpa_clone; | |
3235 | ||
d683ddbb | 3236 | ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); |
13fe0198 MA |
3237 | |
3238 | snap = list_head(&ddpa->shared_snaps); | |
3239 | origin_ds = snap->ds; | |
3240 | dd = hds->ds_dir; | |
34dc7c2f | 3241 | |
13fe0198 | 3242 | snap = list_head(&ddpa->origin_snaps); |
b128c09f BB |
3243 | origin_head = snap->ds; |
3244 | ||
34dc7c2f BB |
3245 | /* |
3246 | * We need to explicitly open odd, since origin_ds's dd will be | |
3247 | * changing. | |
3248 | */ | |
13fe0198 | 3249 | VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, |
34dc7c2f BB |
3250 | NULL, FTAG, &odd)); |
3251 | ||
b5256303 TC |
3252 | dsl_dataset_promote_crypt_sync(hds->ds_dir, odd, tx); |
3253 | ||
b128c09f BB |
3254 | /* change origin's next snap */ |
3255 | dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
d683ddbb | 3256 | oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; |
13fe0198 | 3257 | snap = list_tail(&ddpa->clone_snaps); |
d683ddbb JG |
3258 | ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, |
3259 | origin_ds->ds_object); | |
3260 | dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; | |
b128c09f BB |
3261 | |
3262 | /* change the origin's next clone */ | |
d683ddbb | 3263 | if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { |
13fe0198 MA |
3264 | dsl_dataset_remove_from_next_clones(origin_ds, |
3265 | snap->ds->ds_object, tx); | |
3266 | VERIFY0(zap_add_int(dp->dp_meta_objset, | |
d683ddbb | 3267 | dsl_dataset_phys(origin_ds)->ds_next_clones_obj, |
b128c09f BB |
3268 | oldnext_obj, tx)); |
3269 | } | |
3270 | ||
3271 | /* change origin */ | |
3272 | dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
d683ddbb JG |
3273 | ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); |
3274 | dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; | |
428870ff | 3275 | dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; |
b128c09f | 3276 | dmu_buf_will_dirty(odd->dd_dbuf, tx); |
d683ddbb | 3277 | dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; |
428870ff | 3278 | origin_head->ds_dir->dd_origin_txg = |
d683ddbb | 3279 | dsl_dataset_phys(origin_ds)->ds_creation_txg; |
428870ff BB |
3280 | |
3281 | /* change dd_clone entries */ | |
3282 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
13fe0198 | 3283 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3284 | dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); |
13fe0198 | 3285 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3286 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff BB |
3287 | hds->ds_object, tx)); |
3288 | ||
13fe0198 | 3289 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3290 | dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, |
428870ff | 3291 | origin_head->ds_object, tx)); |
d683ddbb JG |
3292 | if (dsl_dir_phys(dd)->dd_clones == 0) { |
3293 | dsl_dir_phys(dd)->dd_clones = | |
3294 | zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, | |
3295 | DMU_OT_NONE, 0, tx); | |
428870ff | 3296 | } |
13fe0198 | 3297 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3298 | dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); |
428870ff | 3299 | } |
34dc7c2f | 3300 | |
b128c09f | 3301 | /* move snapshots to this dir */ |
13fe0198 MA |
3302 | for (snap = list_head(&ddpa->shared_snaps); snap; |
3303 | snap = list_next(&ddpa->shared_snaps, snap)) { | |
b128c09f BB |
3304 | dsl_dataset_t *ds = snap->ds; |
3305 | ||
13fe0198 MA |
3306 | /* |
3307 | * Property callbacks are registered to a particular | |
3308 | * dsl_dir. Since ours is changing, evict the objset | |
3309 | * so that they will be unregistered from the old dsl_dir. | |
3310 | */ | |
428870ff BB |
3311 | if (ds->ds_objset) { |
3312 | dmu_objset_evict(ds->ds_objset); | |
3313 | ds->ds_objset = NULL; | |
b128c09f | 3314 | } |
13fe0198 | 3315 | |
34dc7c2f | 3316 | /* move snap name entry */ |
13fe0198 MA |
3317 | VERIFY0(dsl_dataset_get_snapname(ds)); |
3318 | VERIFY0(dsl_dataset_snap_remove(origin_head, | |
788eb90c | 3319 | ds->ds_snapname, tx, B_TRUE)); |
13fe0198 | 3320 | VERIFY0(zap_add(dp->dp_meta_objset, |
d683ddbb | 3321 | dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, |
34dc7c2f | 3322 | 8, 1, &ds->ds_object, tx)); |
788eb90c JJ |
3323 | dsl_fs_ss_count_adjust(hds->ds_dir, 1, |
3324 | DD_FIELD_SNAPSHOT_COUNT, tx); | |
428870ff | 3325 | |
34dc7c2f BB |
3326 | /* change containing dsl_dir */ |
3327 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb JG |
3328 | ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); |
3329 | dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; | |
34dc7c2f | 3330 | ASSERT3P(ds->ds_dir, ==, odd); |
13fe0198 MA |
3331 | dsl_dir_rele(ds->ds_dir, ds); |
3332 | VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, | |
34dc7c2f BB |
3333 | NULL, ds, &ds->ds_dir)); |
3334 | ||
428870ff | 3335 | /* move any clone references */ |
d683ddbb | 3336 | if (dsl_dataset_phys(ds)->ds_next_clones_obj && |
428870ff BB |
3337 | spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { |
3338 | zap_cursor_t zc; | |
3339 | zap_attribute_t za; | |
3340 | ||
3341 | for (zap_cursor_init(&zc, dp->dp_meta_objset, | |
d683ddbb | 3342 | dsl_dataset_phys(ds)->ds_next_clones_obj); |
428870ff | 3343 | zap_cursor_retrieve(&zc, &za) == 0; |
13fe0198 MA |
3344 | zap_cursor_advance(&zc)) { |
3345 | dsl_dataset_t *cnds; | |
3346 | uint64_t o; | |
34dc7c2f | 3347 | |
13fe0198 MA |
3348 | if (za.za_first_integer == oldnext_obj) { |
3349 | /* | |
3350 | * We've already moved the | |
3351 | * origin's reference. | |
3352 | */ | |
3353 | continue; | |
3354 | } | |
34dc7c2f | 3355 | |
13fe0198 MA |
3356 | VERIFY0(dsl_dataset_hold_obj(dp, |
3357 | za.za_first_integer, FTAG, &cnds)); | |
d683ddbb JG |
3358 | o = dsl_dir_phys(cnds->ds_dir)-> |
3359 | dd_head_dataset_obj; | |
34dc7c2f | 3360 | |
13fe0198 | 3361 | VERIFY0(zap_remove_int(dp->dp_meta_objset, |
d683ddbb | 3362 | dsl_dir_phys(odd)->dd_clones, o, tx)); |
13fe0198 | 3363 | VERIFY0(zap_add_int(dp->dp_meta_objset, |
d683ddbb | 3364 | dsl_dir_phys(dd)->dd_clones, o, tx)); |
13fe0198 MA |
3365 | dsl_dataset_rele(cnds, FTAG); |
3366 | } | |
3367 | zap_cursor_fini(&zc); | |
3368 | } | |
34dc7c2f | 3369 | |
13fe0198 | 3370 | ASSERT(!dsl_prop_hascb(ds)); |
34dc7c2f BB |
3371 | } |
3372 | ||
34dc7c2f | 3373 | /* |
13fe0198 MA |
3374 | * Change space accounting. |
3375 | * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either | |
3376 | * both be valid, or both be 0 (resulting in delta == 0). This | |
3377 | * is true for each of {clone,origin} independently. | |
34dc7c2f | 3378 | */ |
570827e1 | 3379 | |
13fe0198 | 3380 | delta = ddpa->cloneusedsnap - |
d683ddbb | 3381 | dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
3382 | ASSERT3S(delta, >=, 0); |
3383 | ASSERT3U(ddpa->used, >=, delta); | |
3384 | dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); | |
3385 | dsl_dir_diduse_space(dd, DD_USED_HEAD, | |
3386 | ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); | |
34dc7c2f | 3387 | |
13fe0198 | 3388 | delta = ddpa->originusedsnap - |
d683ddbb | 3389 | dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; |
13fe0198 MA |
3390 | ASSERT3S(delta, <=, 0); |
3391 | ASSERT3U(ddpa->used, >=, -delta); | |
3392 | dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); | |
3393 | dsl_dir_diduse_space(odd, DD_USED_HEAD, | |
3394 | -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); | |
3395 | ||
d683ddbb | 3396 | dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; |
13fe0198 MA |
3397 | |
3398 | /* log history record */ | |
3399 | spa_history_log_internal_ds(hds, "promote", tx, ""); | |
3400 | ||
3401 | dsl_dir_rele(odd, FTAG); | |
3402 | promote_rele(ddpa, FTAG); | |
34dc7c2f BB |
3403 | } |
3404 | ||
13fe0198 MA |
3405 | /* |
3406 | * Make a list of dsl_dataset_t's for the snapshots between first_obj | |
3407 | * (exclusive) and last_obj (inclusive). The list will be in reverse | |
3408 | * order (last_obj will be the list_head()). If first_obj == 0, do all | |
3409 | * snapshots back to this dataset's origin. | |
3410 | */ | |
34dc7c2f | 3411 | static int |
13fe0198 MA |
3412 | snaplist_make(dsl_pool_t *dp, |
3413 | uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) | |
34dc7c2f | 3414 | { |
13fe0198 | 3415 | uint64_t obj = last_obj; |
34dc7c2f | 3416 | |
13fe0198 MA |
3417 | list_create(l, sizeof (struct promotenode), |
3418 | offsetof(struct promotenode, link)); | |
34dc7c2f | 3419 | |
13fe0198 MA |
3420 | while (obj != first_obj) { |
3421 | dsl_dataset_t *ds; | |
3422 | struct promotenode *snap; | |
3423 | int err; | |
428870ff | 3424 | |
13fe0198 MA |
3425 | err = dsl_dataset_hold_obj(dp, obj, tag, &ds); |
3426 | ASSERT(err != ENOENT); | |
3427 | if (err != 0) | |
3428 | return (err); | |
34dc7c2f | 3429 | |
13fe0198 | 3430 | if (first_obj == 0) |
d683ddbb | 3431 | first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; |
13fe0198 | 3432 | |
79c76d5b | 3433 | snap = kmem_alloc(sizeof (*snap), KM_SLEEP); |
13fe0198 MA |
3434 | snap->ds = ds; |
3435 | list_insert_tail(l, snap); | |
d683ddbb | 3436 | obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
13fe0198 | 3437 | } |
34dc7c2f BB |
3438 | |
3439 | return (0); | |
3440 | } | |
3441 | ||
13fe0198 MA |
3442 | static int |
3443 | snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) | |
34dc7c2f | 3444 | { |
13fe0198 | 3445 | struct promotenode *snap; |
6f1ffb06 | 3446 | |
13fe0198 MA |
3447 | *spacep = 0; |
3448 | for (snap = list_head(l); snap; snap = list_next(l, snap)) { | |
3449 | uint64_t used, comp, uncomp; | |
3450 | dsl_deadlist_space_range(&snap->ds->ds_deadlist, | |
3451 | mintxg, UINT64_MAX, &used, &comp, &uncomp); | |
3452 | *spacep += used; | |
428870ff | 3453 | } |
13fe0198 | 3454 | return (0); |
34dc7c2f BB |
3455 | } |
3456 | ||
13fe0198 MA |
3457 | static void |
3458 | snaplist_destroy(list_t *l, void *tag) | |
34dc7c2f | 3459 | { |
13fe0198 | 3460 | struct promotenode *snap; |
428870ff | 3461 | |
13fe0198 MA |
3462 | if (l == NULL || !list_link_active(&l->list_head)) |
3463 | return; | |
34dc7c2f | 3464 | |
13fe0198 MA |
3465 | while ((snap = list_tail(l)) != NULL) { |
3466 | list_remove(l, snap); | |
3467 | dsl_dataset_rele(snap->ds, tag); | |
3468 | kmem_free(snap, sizeof (*snap)); | |
3469 | } | |
3470 | list_destroy(l); | |
34dc7c2f BB |
3471 | } |
3472 | ||
3473 | static int | |
13fe0198 | 3474 | promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) |
34dc7c2f | 3475 | { |
13fe0198 MA |
3476 | int error; |
3477 | dsl_dir_t *dd; | |
3478 | struct promotenode *snap; | |
34dc7c2f | 3479 | |
13fe0198 MA |
3480 | error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, |
3481 | &ddpa->ddpa_clone); | |
3482 | if (error != 0) | |
3483 | return (error); | |
3484 | dd = ddpa->ddpa_clone->ds_dir; | |
34dc7c2f | 3485 | |
0c66c32d | 3486 | if (ddpa->ddpa_clone->ds_is_snapshot || |
13fe0198 MA |
3487 | !dsl_dir_is_clone(dd)) { |
3488 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
2e528b49 | 3489 | return (SET_ERROR(EINVAL)); |
13fe0198 | 3490 | } |
34dc7c2f | 3491 | |
d683ddbb | 3492 | error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, |
13fe0198 MA |
3493 | &ddpa->shared_snaps, tag); |
3494 | if (error != 0) | |
3495 | goto out; | |
34dc7c2f | 3496 | |
13fe0198 MA |
3497 | error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, |
3498 | &ddpa->clone_snaps, tag); | |
3499 | if (error != 0) | |
3500 | goto out; | |
34dc7c2f | 3501 | |
13fe0198 | 3502 | snap = list_head(&ddpa->shared_snaps); |
d683ddbb JG |
3503 | ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); |
3504 | error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, | |
3505 | dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, | |
13fe0198 MA |
3506 | &ddpa->origin_snaps, tag); |
3507 | if (error != 0) | |
3508 | goto out; | |
d164b209 | 3509 | |
d683ddbb | 3510 | if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { |
13fe0198 | 3511 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 3512 | dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, |
13fe0198 MA |
3513 | tag, &ddpa->origin_origin); |
3514 | if (error != 0) | |
3515 | goto out; | |
d164b209 | 3516 | } |
13fe0198 MA |
3517 | out: |
3518 | if (error != 0) | |
3519 | promote_rele(ddpa, tag); | |
3520 | return (error); | |
34dc7c2f BB |
3521 | } |
3522 | ||
34dc7c2f | 3523 | static void |
13fe0198 | 3524 | promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) |
34dc7c2f | 3525 | { |
13fe0198 MA |
3526 | snaplist_destroy(&ddpa->shared_snaps, tag); |
3527 | snaplist_destroy(&ddpa->clone_snaps, tag); | |
3528 | snaplist_destroy(&ddpa->origin_snaps, tag); | |
3529 | if (ddpa->origin_origin != NULL) | |
3530 | dsl_dataset_rele(ddpa->origin_origin, tag); | |
3531 | dsl_dataset_rele(ddpa->ddpa_clone, tag); | |
3532 | } | |
428870ff | 3533 | |
13fe0198 MA |
3534 | /* |
3535 | * Promote a clone. | |
3536 | * | |
3537 | * If it fails due to a conflicting snapshot name, "conflsnap" will be filled | |
eca7b760 | 3538 | * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) |
13fe0198 MA |
3539 | */ |
3540 | int | |
3541 | dsl_dataset_promote(const char *name, char *conflsnap) | |
3542 | { | |
3543 | dsl_dataset_promote_arg_t ddpa = { 0 }; | |
3544 | uint64_t numsnaps; | |
3545 | int error; | |
d99a0153 | 3546 | nvpair_t *snap_pair; |
13fe0198 | 3547 | objset_t *os; |
34dc7c2f | 3548 | |
13fe0198 MA |
3549 | /* |
3550 | * We will modify space proportional to the number of | |
3551 | * snapshots. Compute numsnaps. | |
3552 | */ | |
3553 | error = dmu_objset_hold(name, FTAG, &os); | |
3554 | if (error != 0) | |
3555 | return (error); | |
3556 | error = zap_count(dmu_objset_pool(os)->dp_meta_objset, | |
d683ddbb JG |
3557 | dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, |
3558 | &numsnaps); | |
13fe0198 MA |
3559 | dmu_objset_rele(os, FTAG); |
3560 | if (error != 0) | |
3561 | return (error); | |
34dc7c2f | 3562 | |
13fe0198 | 3563 | ddpa.ddpa_clonename = name; |
d99a0153 | 3564 | ddpa.err_ds = fnvlist_alloc(); |
788eb90c | 3565 | ddpa.cr = CRED(); |
6f1ffb06 | 3566 | |
d99a0153 | 3567 | error = dsl_sync_task(name, dsl_dataset_promote_check, |
3d45fdd6 | 3568 | dsl_dataset_promote_sync, &ddpa, |
d99a0153 CW |
3569 | 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED); |
3570 | ||
3571 | /* | |
3572 | * Return the first conflicting snapshot found. | |
3573 | */ | |
3574 | snap_pair = nvlist_next_nvpair(ddpa.err_ds, NULL); | |
3575 | if (snap_pair != NULL && conflsnap != NULL) | |
3576 | (void) strcpy(conflsnap, nvpair_name(snap_pair)); | |
3577 | ||
3578 | fnvlist_free(ddpa.err_ds); | |
3579 | return (error); | |
34dc7c2f BB |
3580 | } |
3581 | ||
3582 | int | |
13fe0198 | 3583 | dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, |
831baf06 | 3584 | dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) |
34dc7c2f | 3585 | { |
8c62a0d0 DM |
3586 | /* |
3587 | * "slack" factor for received datasets with refquota set on them. | |
3588 | * See the bottom of this function for details on its use. | |
3589 | */ | |
bf18fd89 CIK |
3590 | uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS * |
3591 | spa_asize_inflation; | |
13fe0198 | 3592 | int64_t unused_refres_delta; |
34dc7c2f | 3593 | |
13fe0198 | 3594 | /* they should both be heads */ |
0c66c32d JG |
3595 | if (clone->ds_is_snapshot || |
3596 | origin_head->ds_is_snapshot) | |
2e528b49 | 3597 | return (SET_ERROR(EINVAL)); |
428870ff | 3598 | |
19580676 MA |
3599 | /* if we are not forcing, the branch point should be just before them */ |
3600 | if (!force && clone->ds_prev != origin_head->ds_prev) | |
2e528b49 | 3601 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 3602 | |
13fe0198 MA |
3603 | /* clone should be the clone (unless they are unrelated) */ |
3604 | if (clone->ds_prev != NULL && | |
3605 | clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && | |
19580676 | 3606 | origin_head->ds_dir != clone->ds_prev->ds_dir) |
2e528b49 | 3607 | return (SET_ERROR(EINVAL)); |
428870ff | 3608 | |
13fe0198 MA |
3609 | /* the clone should be a child of the origin */ |
3610 | if (clone->ds_dir->dd_parent != origin_head->ds_dir) | |
2e528b49 | 3611 | return (SET_ERROR(EINVAL)); |
45d1cae3 | 3612 | |
13fe0198 | 3613 | /* origin_head shouldn't be modified unless 'force' */ |
19580676 MA |
3614 | if (!force && |
3615 | dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) | |
2e528b49 | 3616 | return (SET_ERROR(ETXTBSY)); |
572e2857 | 3617 | |
13fe0198 | 3618 | /* origin_head should have no long holds (e.g. is not mounted) */ |
831baf06 | 3619 | if (dsl_dataset_handoff_check(origin_head, owner, tx)) |
2e528b49 | 3620 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
3621 | |
3622 | /* check amount of any unconsumed refreservation */ | |
3623 | unused_refres_delta = | |
3624 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 3625 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3626 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3627 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3628 | |
3629 | if (unused_refres_delta > 0 && | |
3630 | unused_refres_delta > | |
3631 | dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) | |
2e528b49 | 3632 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3633 | |
8c62a0d0 DM |
3634 | /* |
3635 | * The clone can't be too much over the head's refquota. | |
3636 | * | |
3637 | * To ensure that the entire refquota can be used, we allow one | |
3638 | * transaction to exceed the the refquota. Therefore, this check | |
3639 | * needs to also allow for the space referenced to be more than the | |
3640 | * refquota. The maximum amount of space that one transaction can use | |
3641 | * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this | |
3642 | * overage ensures that we are able to receive a filesystem that | |
3643 | * exceeds the refquota on the source system. | |
3644 | * | |
3645 | * So that overage is the refquota_slack we use below. | |
3646 | */ | |
13fe0198 | 3647 | if (origin_head->ds_quota != 0 && |
d683ddbb | 3648 | dsl_dataset_phys(clone)->ds_referenced_bytes > |
8c62a0d0 | 3649 | origin_head->ds_quota + refquota_slack) |
2e528b49 | 3650 | return (SET_ERROR(EDQUOT)); |
572e2857 | 3651 | |
13fe0198 | 3652 | return (0); |
572e2857 BB |
3653 | } |
3654 | ||
a1d477c2 MA |
3655 | static void |
3656 | dsl_dataset_swap_remap_deadlists(dsl_dataset_t *clone, | |
3657 | dsl_dataset_t *origin, dmu_tx_t *tx) | |
3658 | { | |
3659 | uint64_t clone_remap_dl_obj, origin_remap_dl_obj; | |
3660 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3661 | ||
3662 | ASSERT(dsl_pool_sync_context(dp)); | |
3663 | ||
3664 | clone_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(clone); | |
3665 | origin_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(origin); | |
3666 | ||
3667 | if (clone_remap_dl_obj != 0) { | |
3668 | dsl_deadlist_close(&clone->ds_remap_deadlist); | |
3669 | dsl_dataset_unset_remap_deadlist_object(clone, tx); | |
3670 | } | |
3671 | if (origin_remap_dl_obj != 0) { | |
3672 | dsl_deadlist_close(&origin->ds_remap_deadlist); | |
3673 | dsl_dataset_unset_remap_deadlist_object(origin, tx); | |
3674 | } | |
3675 | ||
3676 | if (clone_remap_dl_obj != 0) { | |
3677 | dsl_dataset_set_remap_deadlist_object(origin, | |
3678 | clone_remap_dl_obj, tx); | |
3679 | dsl_deadlist_open(&origin->ds_remap_deadlist, | |
3680 | dp->dp_meta_objset, clone_remap_dl_obj); | |
3681 | } | |
3682 | if (origin_remap_dl_obj != 0) { | |
3683 | dsl_dataset_set_remap_deadlist_object(clone, | |
3684 | origin_remap_dl_obj, tx); | |
3685 | dsl_deadlist_open(&clone->ds_remap_deadlist, | |
3686 | dp->dp_meta_objset, origin_remap_dl_obj); | |
3687 | } | |
3688 | } | |
3689 | ||
572e2857 | 3690 | void |
13fe0198 MA |
3691 | dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, |
3692 | dsl_dataset_t *origin_head, dmu_tx_t *tx) | |
572e2857 | 3693 | { |
13fe0198 MA |
3694 | dsl_pool_t *dp = dmu_tx_pool(tx); |
3695 | int64_t unused_refres_delta; | |
428870ff | 3696 | |
13fe0198 | 3697 | ASSERT(clone->ds_reserved == 0); |
8c62a0d0 DM |
3698 | /* |
3699 | * NOTE: On DEBUG kernels there could be a race between this and | |
3700 | * the check function if spa_asize_inflation is adjusted... | |
3701 | */ | |
13fe0198 | 3702 | ASSERT(origin_head->ds_quota == 0 || |
8c62a0d0 DM |
3703 | dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + |
3704 | DMU_MAX_ACCESS * spa_asize_inflation); | |
19580676 | 3705 | ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); |
45d1cae3 | 3706 | |
241b5415 MA |
3707 | /* |
3708 | * Swap per-dataset feature flags. | |
3709 | */ | |
4a5d7f82 | 3710 | for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { |
241b5415 MA |
3711 | if (!(spa_feature_table[f].fi_flags & |
3712 | ZFEATURE_FLAG_PER_DATASET)) { | |
d52d80b7 PD |
3713 | ASSERT(!dsl_dataset_feature_is_active(clone, f)); |
3714 | ASSERT(!dsl_dataset_feature_is_active(origin_head, f)); | |
241b5415 MA |
3715 | continue; |
3716 | } | |
3717 | ||
d52d80b7 PD |
3718 | boolean_t clone_inuse = dsl_dataset_feature_is_active(clone, f); |
3719 | void *clone_feature = clone->ds_feature[f]; | |
3720 | boolean_t origin_head_inuse = | |
3721 | dsl_dataset_feature_is_active(origin_head, f); | |
3722 | void *origin_head_feature = origin_head->ds_feature[f]; | |
3723 | ||
3724 | if (clone_inuse) | |
3725 | dsl_dataset_deactivate_feature_impl(clone, f, tx); | |
3726 | if (origin_head_inuse) | |
3727 | dsl_dataset_deactivate_feature_impl(origin_head, f, tx); | |
241b5415 MA |
3728 | |
3729 | if (clone_inuse) { | |
d52d80b7 PD |
3730 | dsl_dataset_activate_feature(origin_head->ds_object, f, |
3731 | clone_feature, tx); | |
3732 | origin_head->ds_feature[f] = clone_feature; | |
241b5415 MA |
3733 | } |
3734 | if (origin_head_inuse) { | |
d52d80b7 PD |
3735 | dsl_dataset_activate_feature(clone->ds_object, f, |
3736 | origin_head_feature, tx); | |
3737 | clone->ds_feature[f] = origin_head_feature; | |
241b5415 MA |
3738 | } |
3739 | } | |
3740 | ||
13fe0198 MA |
3741 | dmu_buf_will_dirty(clone->ds_dbuf, tx); |
3742 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
45d1cae3 | 3743 | |
13fe0198 MA |
3744 | if (clone->ds_objset != NULL) { |
3745 | dmu_objset_evict(clone->ds_objset); | |
3746 | clone->ds_objset = NULL; | |
3747 | } | |
45d1cae3 | 3748 | |
13fe0198 MA |
3749 | if (origin_head->ds_objset != NULL) { |
3750 | dmu_objset_evict(origin_head->ds_objset); | |
3751 | origin_head->ds_objset = NULL; | |
45d1cae3 | 3752 | } |
45d1cae3 | 3753 | |
13fe0198 MA |
3754 | unused_refres_delta = |
3755 | (int64_t)MIN(origin_head->ds_reserved, | |
d683ddbb | 3756 | dsl_dataset_phys(origin_head)->ds_unique_bytes) - |
13fe0198 | 3757 | (int64_t)MIN(origin_head->ds_reserved, |
d683ddbb | 3758 | dsl_dataset_phys(clone)->ds_unique_bytes); |
13fe0198 MA |
3759 | |
3760 | /* | |
3761 | * Reset origin's unique bytes, if it exists. | |
3762 | */ | |
3763 | if (clone->ds_prev) { | |
3764 | dsl_dataset_t *origin = clone->ds_prev; | |
3765 | uint64_t comp, uncomp; | |
3766 | ||
3767 | dmu_buf_will_dirty(origin->ds_dbuf, tx); | |
3768 | dsl_deadlist_space_range(&clone->ds_deadlist, | |
d683ddbb JG |
3769 | dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, |
3770 | &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); | |
13fe0198 MA |
3771 | } |
3772 | ||
3773 | /* swap blkptrs */ | |
3774 | { | |
cc9bb3e5 GM |
3775 | rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG); |
3776 | rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG); | |
1c27024e | 3777 | blkptr_t tmp; |
d683ddbb JG |
3778 | tmp = dsl_dataset_phys(origin_head)->ds_bp; |
3779 | dsl_dataset_phys(origin_head)->ds_bp = | |
3780 | dsl_dataset_phys(clone)->ds_bp; | |
3781 | dsl_dataset_phys(clone)->ds_bp = tmp; | |
cc9bb3e5 GM |
3782 | rrw_exit(&origin_head->ds_bp_rwlock, FTAG); |
3783 | rrw_exit(&clone->ds_bp_rwlock, FTAG); | |
13fe0198 MA |
3784 | } |
3785 | ||
3786 | /* set dd_*_bytes */ | |
3787 | { | |
3788 | int64_t dused, dcomp, duncomp; | |
3789 | uint64_t cdl_used, cdl_comp, cdl_uncomp; | |
3790 | uint64_t odl_used, odl_comp, odl_uncomp; | |
3791 | ||
d683ddbb | 3792 | ASSERT3U(dsl_dir_phys(clone->ds_dir)-> |
13fe0198 MA |
3793 | dd_used_breakdown[DD_USED_SNAP], ==, 0); |
3794 | ||
3795 | dsl_deadlist_space(&clone->ds_deadlist, | |
3796 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3797 | dsl_deadlist_space(&origin_head->ds_deadlist, | |
3798 | &odl_used, &odl_comp, &odl_uncomp); | |
428870ff | 3799 | |
d683ddbb JG |
3800 | dused = dsl_dataset_phys(clone)->ds_referenced_bytes + |
3801 | cdl_used - | |
3802 | (dsl_dataset_phys(origin_head)->ds_referenced_bytes + | |
3803 | odl_used); | |
3804 | dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + | |
3805 | cdl_comp - | |
3806 | (dsl_dataset_phys(origin_head)->ds_compressed_bytes + | |
3807 | odl_comp); | |
3808 | duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + | |
13fe0198 | 3809 | cdl_uncomp - |
d683ddbb JG |
3810 | (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + |
3811 | odl_uncomp); | |
45d1cae3 | 3812 | |
13fe0198 MA |
3813 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, |
3814 | dused, dcomp, duncomp, tx); | |
3815 | dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, | |
3816 | -dused, -dcomp, -duncomp, tx); | |
45d1cae3 | 3817 | |
45d1cae3 | 3818 | /* |
13fe0198 MA |
3819 | * The difference in the space used by snapshots is the |
3820 | * difference in snapshot space due to the head's | |
3821 | * deadlist (since that's the only thing that's | |
3822 | * changing that affects the snapused). | |
45d1cae3 | 3823 | */ |
13fe0198 MA |
3824 | dsl_deadlist_space_range(&clone->ds_deadlist, |
3825 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3826 | &cdl_used, &cdl_comp, &cdl_uncomp); | |
3827 | dsl_deadlist_space_range(&origin_head->ds_deadlist, | |
3828 | origin_head->ds_dir->dd_origin_txg, UINT64_MAX, | |
3829 | &odl_used, &odl_comp, &odl_uncomp); | |
3830 | dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, | |
3831 | DD_USED_HEAD, DD_USED_SNAP, tx); | |
45d1cae3 | 3832 | } |
45d1cae3 | 3833 | |
13fe0198 | 3834 | /* swap ds_*_bytes */ |
d683ddbb JG |
3835 | SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, |
3836 | dsl_dataset_phys(clone)->ds_referenced_bytes); | |
3837 | SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, | |
3838 | dsl_dataset_phys(clone)->ds_compressed_bytes); | |
3839 | SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, | |
3840 | dsl_dataset_phys(clone)->ds_uncompressed_bytes); | |
3841 | SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, | |
3842 | dsl_dataset_phys(clone)->ds_unique_bytes); | |
45d1cae3 | 3843 | |
13fe0198 MA |
3844 | /* apply any parent delta for change in unconsumed refreservation */ |
3845 | dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, | |
3846 | unused_refres_delta, 0, 0, tx); | |
45d1cae3 | 3847 | |
13fe0198 MA |
3848 | /* |
3849 | * Swap deadlists. | |
3850 | */ | |
3851 | dsl_deadlist_close(&clone->ds_deadlist); | |
3852 | dsl_deadlist_close(&origin_head->ds_deadlist); | |
d683ddbb JG |
3853 | SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, |
3854 | dsl_dataset_phys(clone)->ds_deadlist_obj); | |
13fe0198 | 3855 | dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3856 | dsl_dataset_phys(clone)->ds_deadlist_obj); |
13fe0198 | 3857 | dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, |
d683ddbb | 3858 | dsl_dataset_phys(origin_head)->ds_deadlist_obj); |
a1d477c2 | 3859 | dsl_dataset_swap_remap_deadlists(clone, origin_head, tx); |
45d1cae3 | 3860 | |
13fe0198 | 3861 | dsl_scan_ds_clone_swapped(origin_head, clone, tx); |
45d1cae3 | 3862 | |
13fe0198 MA |
3863 | spa_history_log_internal_ds(clone, "clone swap", tx, |
3864 | "parent=%s", origin_head->ds_dir->dd_myname); | |
45d1cae3 BB |
3865 | } |
3866 | ||
13fe0198 MA |
3867 | /* |
3868 | * Given a pool name and a dataset object number in that pool, | |
3869 | * return the name of that dataset. | |
3870 | */ | |
572e2857 | 3871 | int |
13fe0198 | 3872 | dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) |
572e2857 | 3873 | { |
13fe0198 MA |
3874 | dsl_pool_t *dp; |
3875 | dsl_dataset_t *ds; | |
572e2857 BB |
3876 | int error; |
3877 | ||
13fe0198 MA |
3878 | error = dsl_pool_hold(pname, FTAG, &dp); |
3879 | if (error != 0) | |
3880 | return (error); | |
3881 | ||
3882 | error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); | |
3883 | if (error == 0) { | |
3884 | dsl_dataset_name(ds, buf); | |
3885 | dsl_dataset_rele(ds, FTAG); | |
3886 | } | |
3887 | dsl_pool_rele(dp, FTAG); | |
572e2857 BB |
3888 | |
3889 | return (error); | |
3890 | } | |
3891 | ||
45d1cae3 | 3892 | int |
13fe0198 MA |
3893 | dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
3894 | uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) | |
45d1cae3 | 3895 | { |
13fe0198 | 3896 | int error = 0; |
45d1cae3 | 3897 | |
13fe0198 | 3898 | ASSERT3S(asize, >, 0); |
45d1cae3 | 3899 | |
13fe0198 MA |
3900 | /* |
3901 | * *ref_rsrv is the portion of asize that will come from any | |
3902 | * unconsumed refreservation space. | |
3903 | */ | |
3904 | *ref_rsrv = 0; | |
45d1cae3 | 3905 | |
13fe0198 MA |
3906 | mutex_enter(&ds->ds_lock); |
3907 | /* | |
3908 | * Make a space adjustment for reserved bytes. | |
3909 | */ | |
d683ddbb | 3910 | if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { |
13fe0198 | 3911 | ASSERT3U(*used, >=, |
d683ddbb JG |
3912 | ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); |
3913 | *used -= | |
3914 | (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); | |
13fe0198 MA |
3915 | *ref_rsrv = |
3916 | asize - MIN(asize, parent_delta(ds, asize + inflight)); | |
45d1cae3 BB |
3917 | } |
3918 | ||
13fe0198 MA |
3919 | if (!check_quota || ds->ds_quota == 0) { |
3920 | mutex_exit(&ds->ds_lock); | |
3921 | return (0); | |
45d1cae3 | 3922 | } |
13fe0198 MA |
3923 | /* |
3924 | * If they are requesting more space, and our current estimate | |
3925 | * is over quota, they get to try again unless the actual | |
3926 | * on-disk is over quota and there are no pending changes (which | |
3927 | * may free up space for us). | |
3928 | */ | |
d683ddbb JG |
3929 | if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= |
3930 | ds->ds_quota) { | |
13fe0198 | 3931 | if (inflight > 0 || |
d683ddbb | 3932 | dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) |
2e528b49 | 3933 | error = SET_ERROR(ERESTART); |
13fe0198 | 3934 | else |
2e528b49 | 3935 | error = SET_ERROR(EDQUOT); |
45d1cae3 | 3936 | } |
13fe0198 | 3937 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 3938 | |
45d1cae3 BB |
3939 | return (error); |
3940 | } | |
3941 | ||
13fe0198 MA |
3942 | typedef struct dsl_dataset_set_qr_arg { |
3943 | const char *ddsqra_name; | |
3944 | zprop_source_t ddsqra_source; | |
3945 | uint64_t ddsqra_value; | |
3946 | } dsl_dataset_set_qr_arg_t; | |
45d1cae3 | 3947 | |
13fe0198 MA |
3948 | |
3949 | /* ARGSUSED */ | |
45d1cae3 | 3950 | static int |
13fe0198 | 3951 | dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 3952 | { |
13fe0198 MA |
3953 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3954 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3955 | dsl_dataset_t *ds; | |
45d1cae3 | 3956 | int error; |
13fe0198 | 3957 | uint64_t newval; |
45d1cae3 | 3958 | |
13fe0198 | 3959 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) |
2e528b49 | 3960 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 3961 | |
13fe0198 MA |
3962 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
3963 | if (error != 0) | |
3964 | return (error); | |
3965 | ||
0c66c32d | 3966 | if (ds->ds_is_snapshot) { |
13fe0198 | 3967 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 3968 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
3969 | } |
3970 | ||
13fe0198 MA |
3971 | error = dsl_prop_predict(ds->ds_dir, |
3972 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
3973 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
3974 | if (error != 0) { | |
3975 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
3976 | return (error); |
3977 | } | |
3978 | ||
13fe0198 MA |
3979 | if (newval == 0) { |
3980 | dsl_dataset_rele(ds, FTAG); | |
3981 | return (0); | |
3982 | } | |
3983 | ||
d683ddbb | 3984 | if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || |
13fe0198 MA |
3985 | newval < ds->ds_reserved) { |
3986 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 3987 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 3988 | } |
45d1cae3 | 3989 | |
13fe0198 | 3990 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
3991 | return (0); |
3992 | } | |
3993 | ||
13fe0198 MA |
3994 | static void |
3995 | dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 3996 | { |
13fe0198 MA |
3997 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
3998 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 3999 | dsl_dataset_t *ds = NULL; |
13fe0198 | 4000 | uint64_t newval; |
45d1cae3 | 4001 | |
13fe0198 | 4002 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
45d1cae3 | 4003 | |
13fe0198 MA |
4004 | dsl_prop_set_sync_impl(ds, |
4005 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), | |
4006 | ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, | |
4007 | &ddsqra->ddsqra_value, tx); | |
45d1cae3 | 4008 | |
13fe0198 MA |
4009 | VERIFY0(dsl_prop_get_int_ds(ds, |
4010 | zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); | |
45d1cae3 | 4011 | |
13fe0198 MA |
4012 | if (ds->ds_quota != newval) { |
4013 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
4014 | ds->ds_quota = newval; | |
45d1cae3 | 4015 | } |
13fe0198 | 4016 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 BB |
4017 | } |
4018 | ||
13fe0198 MA |
4019 | int |
4020 | dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, | |
4021 | uint64_t refquota) | |
45d1cae3 | 4022 | { |
13fe0198 | 4023 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 4024 | |
13fe0198 MA |
4025 | ddsqra.ddsqra_name = dsname; |
4026 | ddsqra.ddsqra_source = source; | |
4027 | ddsqra.ddsqra_value = refquota; | |
4028 | ||
4029 | return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, | |
d2734cce SD |
4030 | dsl_dataset_set_refquota_sync, &ddsqra, 0, |
4031 | ZFS_SPACE_CHECK_EXTRA_RESERVED)); | |
45d1cae3 BB |
4032 | } |
4033 | ||
4034 | static int | |
13fe0198 | 4035 | dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) |
45d1cae3 | 4036 | { |
13fe0198 MA |
4037 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4038 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
45d1cae3 BB |
4039 | dsl_dataset_t *ds; |
4040 | int error; | |
13fe0198 | 4041 | uint64_t newval, unique; |
428870ff | 4042 | |
13fe0198 | 4043 | if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) |
2e528b49 | 4044 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 | 4045 | |
13fe0198 MA |
4046 | error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); |
4047 | if (error != 0) | |
45d1cae3 | 4048 | return (error); |
45d1cae3 | 4049 | |
0c66c32d | 4050 | if (ds->ds_is_snapshot) { |
13fe0198 | 4051 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 4052 | return (SET_ERROR(EINVAL)); |
45d1cae3 BB |
4053 | } |
4054 | ||
13fe0198 MA |
4055 | error = dsl_prop_predict(ds->ds_dir, |
4056 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), | |
4057 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); | |
4058 | if (error != 0) { | |
4059 | dsl_dataset_rele(ds, FTAG); | |
45d1cae3 BB |
4060 | return (error); |
4061 | } | |
4062 | ||
13fe0198 MA |
4063 | /* |
4064 | * If we are doing the preliminary check in open context, the | |
4065 | * space estimates may be inaccurate. | |
4066 | */ | |
4067 | if (!dmu_tx_is_syncing(tx)) { | |
4068 | dsl_dataset_rele(ds, FTAG); | |
4069 | return (0); | |
45d1cae3 | 4070 | } |
45d1cae3 | 4071 | |
13fe0198 MA |
4072 | mutex_enter(&ds->ds_lock); |
4073 | if (!DS_UNIQUE_IS_ACCURATE(ds)) | |
4074 | dsl_dataset_recalc_head_uniq(ds); | |
d683ddbb | 4075 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 | 4076 | mutex_exit(&ds->ds_lock); |
45d1cae3 | 4077 | |
13fe0198 MA |
4078 | if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { |
4079 | uint64_t delta = MAX(unique, newval) - | |
4080 | MAX(unique, ds->ds_reserved); | |
45d1cae3 | 4081 | |
13fe0198 MA |
4082 | if (delta > |
4083 | dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || | |
4084 | (ds->ds_quota > 0 && newval > ds->ds_quota)) { | |
4085 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 4086 | return (SET_ERROR(ENOSPC)); |
13fe0198 | 4087 | } |
45d1cae3 BB |
4088 | } |
4089 | ||
13fe0198 MA |
4090 | dsl_dataset_rele(ds, FTAG); |
4091 | return (0); | |
45d1cae3 BB |
4092 | } |
4093 | ||
13fe0198 MA |
4094 | void |
4095 | dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, | |
4096 | zprop_source_t source, uint64_t value, dmu_tx_t *tx) | |
428870ff | 4097 | { |
13fe0198 MA |
4098 | uint64_t newval; |
4099 | uint64_t unique; | |
4100 | int64_t delta; | |
428870ff | 4101 | |
13fe0198 MA |
4102 | dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), |
4103 | source, sizeof (value), 1, &value, tx); | |
428870ff | 4104 | |
13fe0198 MA |
4105 | VERIFY0(dsl_prop_get_int_ds(ds, |
4106 | zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); | |
572e2857 | 4107 | |
13fe0198 MA |
4108 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
4109 | mutex_enter(&ds->ds_dir->dd_lock); | |
4110 | mutex_enter(&ds->ds_lock); | |
4111 | ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); | |
d683ddbb | 4112 | unique = dsl_dataset_phys(ds)->ds_unique_bytes; |
13fe0198 MA |
4113 | delta = MAX(0, (int64_t)(newval - unique)) - |
4114 | MAX(0, (int64_t)(ds->ds_reserved - unique)); | |
4115 | ds->ds_reserved = newval; | |
4116 | mutex_exit(&ds->ds_lock); | |
572e2857 | 4117 | |
13fe0198 MA |
4118 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); |
4119 | mutex_exit(&ds->ds_dir->dd_lock); | |
428870ff BB |
4120 | } |
4121 | ||
13fe0198 MA |
4122 | static void |
4123 | dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) | |
45d1cae3 | 4124 | { |
13fe0198 MA |
4125 | dsl_dataset_set_qr_arg_t *ddsqra = arg; |
4126 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
689f093e | 4127 | dsl_dataset_t *ds = NULL; |
45d1cae3 | 4128 | |
13fe0198 MA |
4129 | VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); |
4130 | dsl_dataset_set_refreservation_sync_impl(ds, | |
4131 | ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); | |
45d1cae3 | 4132 | dsl_dataset_rele(ds, FTAG); |
45d1cae3 | 4133 | } |
428870ff | 4134 | |
428870ff | 4135 | int |
13fe0198 MA |
4136 | dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, |
4137 | uint64_t refreservation) | |
428870ff | 4138 | { |
13fe0198 | 4139 | dsl_dataset_set_qr_arg_t ddsqra; |
428870ff | 4140 | |
13fe0198 MA |
4141 | ddsqra.ddsqra_name = dsname; |
4142 | ddsqra.ddsqra_source = source; | |
4143 | ddsqra.ddsqra_value = refreservation; | |
c28b2279 | 4144 | |
13fe0198 | 4145 | return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, |
d2734cce SD |
4146 | dsl_dataset_set_refreservation_sync, &ddsqra, 0, |
4147 | ZFS_SPACE_CHECK_EXTRA_RESERVED)); | |
13fe0198 | 4148 | } |
330d06f9 MA |
4149 | |
4150 | /* | |
4151 | * Return (in *usedp) the amount of space written in new that is not | |
4152 | * present in oldsnap. New may be a snapshot or the head. Old must be | |
4153 | * a snapshot before new, in new's filesystem (or its origin). If not then | |
4154 | * fail and return EINVAL. | |
4155 | * | |
4156 | * The written space is calculated by considering two components: First, we | |
4157 | * ignore any freed space, and calculate the written as new's used space | |
4158 | * minus old's used space. Next, we add in the amount of space that was freed | |
4159 | * between the two snapshots, thus reducing new's used space relative to old's. | |
4160 | * Specifically, this is the space that was born before old->ds_creation_txg, | |
4161 | * and freed before new (ie. on new's deadlist or a previous deadlist). | |
4162 | * | |
4163 | * space freed [---------------------] | |
4164 | * snapshots ---O-------O--------O-------O------ | |
4165 | * oldsnap new | |
4166 | */ | |
4167 | int | |
4168 | dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, | |
4169 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
4170 | { | |
4171 | int err = 0; | |
4172 | uint64_t snapobj; | |
4173 | dsl_pool_t *dp = new->ds_dir->dd_pool; | |
4174 | ||
13fe0198 MA |
4175 | ASSERT(dsl_pool_config_held(dp)); |
4176 | ||
330d06f9 | 4177 | *usedp = 0; |
d683ddbb JG |
4178 | *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; |
4179 | *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; | |
330d06f9 MA |
4180 | |
4181 | *compp = 0; | |
d683ddbb JG |
4182 | *compp += dsl_dataset_phys(new)->ds_compressed_bytes; |
4183 | *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; | |
330d06f9 MA |
4184 | |
4185 | *uncompp = 0; | |
d683ddbb JG |
4186 | *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; |
4187 | *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; | |
330d06f9 | 4188 | |
330d06f9 MA |
4189 | snapobj = new->ds_object; |
4190 | while (snapobj != oldsnap->ds_object) { | |
4191 | dsl_dataset_t *snap; | |
4192 | uint64_t used, comp, uncomp; | |
4193 | ||
9ae529ec CS |
4194 | if (snapobj == new->ds_object) { |
4195 | snap = new; | |
4196 | } else { | |
4197 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); | |
4198 | if (err != 0) | |
4199 | break; | |
4200 | } | |
330d06f9 | 4201 | |
d683ddbb JG |
4202 | if (dsl_dataset_phys(snap)->ds_prev_snap_txg == |
4203 | dsl_dataset_phys(oldsnap)->ds_creation_txg) { | |
330d06f9 MA |
4204 | /* |
4205 | * The blocks in the deadlist can not be born after | |
4206 | * ds_prev_snap_txg, so get the whole deadlist space, | |
4207 | * which is more efficient (especially for old-format | |
4208 | * deadlists). Unfortunately the deadlist code | |
4209 | * doesn't have enough information to make this | |
4210 | * optimization itself. | |
4211 | */ | |
4212 | dsl_deadlist_space(&snap->ds_deadlist, | |
4213 | &used, &comp, &uncomp); | |
4214 | } else { | |
4215 | dsl_deadlist_space_range(&snap->ds_deadlist, | |
d683ddbb | 4216 | 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, |
330d06f9 MA |
4217 | &used, &comp, &uncomp); |
4218 | } | |
4219 | *usedp += used; | |
4220 | *compp += comp; | |
4221 | *uncompp += uncomp; | |
4222 | ||
4223 | /* | |
4224 | * If we get to the beginning of the chain of snapshots | |
4225 | * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap | |
4226 | * was not a snapshot of/before new. | |
4227 | */ | |
d683ddbb | 4228 | snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
9ae529ec CS |
4229 | if (snap != new) |
4230 | dsl_dataset_rele(snap, FTAG); | |
330d06f9 | 4231 | if (snapobj == 0) { |
2e528b49 | 4232 | err = SET_ERROR(EINVAL); |
330d06f9 MA |
4233 | break; |
4234 | } | |
4235 | ||
4236 | } | |
330d06f9 MA |
4237 | return (err); |
4238 | } | |
4239 | ||
4240 | /* | |
4241 | * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, | |
4242 | * lastsnap, and all snapshots in between are deleted. | |
4243 | * | |
4244 | * blocks that would be freed [---------------------------] | |
4245 | * snapshots ---O-------O--------O-------O--------O | |
4246 | * firstsnap lastsnap | |
4247 | * | |
4248 | * This is the set of blocks that were born after the snap before firstsnap, | |
4249 | * (birth > firstsnap->prev_snap_txg) and died before the snap after the | |
4250 | * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). | |
4251 | * We calculate this by iterating over the relevant deadlists (from the snap | |
4252 | * after lastsnap, backward to the snap after firstsnap), summing up the | |
4253 | * space on the deadlist that was born after the snap before firstsnap. | |
4254 | */ | |
4255 | int | |
4256 | dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, | |
4257 | dsl_dataset_t *lastsnap, | |
4258 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) | |
4259 | { | |
4260 | int err = 0; | |
4261 | uint64_t snapobj; | |
4262 | dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; | |
4263 | ||
0c66c32d JG |
4264 | ASSERT(firstsnap->ds_is_snapshot); |
4265 | ASSERT(lastsnap->ds_is_snapshot); | |
330d06f9 MA |
4266 | |
4267 | /* | |
4268 | * Check that the snapshots are in the same dsl_dir, and firstsnap | |
4269 | * is before lastsnap. | |
4270 | */ | |
4271 | if (firstsnap->ds_dir != lastsnap->ds_dir || | |
d683ddbb JG |
4272 | dsl_dataset_phys(firstsnap)->ds_creation_txg > |
4273 | dsl_dataset_phys(lastsnap)->ds_creation_txg) | |
2e528b49 | 4274 | return (SET_ERROR(EINVAL)); |
330d06f9 MA |
4275 | |
4276 | *usedp = *compp = *uncompp = 0; | |
4277 | ||
d683ddbb | 4278 | snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; |
330d06f9 MA |
4279 | while (snapobj != firstsnap->ds_object) { |
4280 | dsl_dataset_t *ds; | |
4281 | uint64_t used, comp, uncomp; | |
4282 | ||
4283 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); | |
4284 | if (err != 0) | |
4285 | break; | |
4286 | ||
4287 | dsl_deadlist_space_range(&ds->ds_deadlist, | |
d683ddbb | 4288 | dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, |
330d06f9 MA |
4289 | &used, &comp, &uncomp); |
4290 | *usedp += used; | |
4291 | *compp += comp; | |
4292 | *uncompp += uncomp; | |
4293 | ||
d683ddbb | 4294 | snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
330d06f9 MA |
4295 | ASSERT3U(snapobj, !=, 0); |
4296 | dsl_dataset_rele(ds, FTAG); | |
4297 | } | |
330d06f9 MA |
4298 | return (err); |
4299 | } | |
4300 | ||
13fe0198 MA |
4301 | /* |
4302 | * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. | |
4303 | * For example, they could both be snapshots of the same filesystem, and | |
4304 | * 'earlier' is before 'later'. Or 'earlier' could be the origin of | |
4305 | * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's | |
4306 | * filesystem. Or 'earlier' could be the origin's origin. | |
da536844 MA |
4307 | * |
4308 | * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. | |
13fe0198 MA |
4309 | */ |
4310 | boolean_t | |
da536844 | 4311 | dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, |
e9aa730c | 4312 | uint64_t earlier_txg) |
13fe0198 MA |
4313 | { |
4314 | dsl_pool_t *dp = later->ds_dir->dd_pool; | |
4315 | int error; | |
4316 | boolean_t ret; | |
13fe0198 MA |
4317 | |
4318 | ASSERT(dsl_pool_config_held(dp)); | |
0c66c32d | 4319 | ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); |
da536844 MA |
4320 | |
4321 | if (earlier_txg == 0) | |
d683ddbb | 4322 | earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; |
13fe0198 | 4323 | |
0c66c32d | 4324 | if (later->ds_is_snapshot && |
d683ddbb | 4325 | earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) |
13fe0198 MA |
4326 | return (B_FALSE); |
4327 | ||
4328 | if (later->ds_dir == earlier->ds_dir) | |
4329 | return (B_TRUE); | |
4330 | if (!dsl_dir_is_clone(later->ds_dir)) | |
4331 | return (B_FALSE); | |
4332 | ||
d683ddbb | 4333 | if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) |
13fe0198 | 4334 | return (B_TRUE); |
1c27024e | 4335 | dsl_dataset_t *origin; |
13fe0198 | 4336 | error = dsl_dataset_hold_obj(dp, |
d683ddbb | 4337 | dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); |
13fe0198 MA |
4338 | if (error != 0) |
4339 | return (B_FALSE); | |
da536844 | 4340 | ret = dsl_dataset_is_before(origin, earlier, earlier_txg); |
13fe0198 MA |
4341 | dsl_dataset_rele(origin, FTAG); |
4342 | return (ret); | |
4343 | } | |
4344 | ||
fa86b5db MA |
4345 | void |
4346 | dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4347 | { | |
4348 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
4349 | dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); | |
4350 | } | |
4351 | ||
47dfff3b MA |
4352 | boolean_t |
4353 | dsl_dataset_is_zapified(dsl_dataset_t *ds) | |
4354 | { | |
4355 | dmu_object_info_t doi; | |
4356 | ||
4357 | dmu_object_info_from_db(ds->ds_dbuf, &doi); | |
4358 | return (doi.doi_type == DMU_OTN_ZAP_METADATA); | |
4359 | } | |
4360 | ||
4361 | boolean_t | |
4362 | dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) | |
4363 | { | |
4364 | return (dsl_dataset_is_zapified(ds) && | |
4365 | zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, | |
4366 | ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); | |
4367 | } | |
4368 | ||
a1d477c2 MA |
4369 | uint64_t |
4370 | dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds) | |
4371 | { | |
4372 | uint64_t remap_deadlist_obj; | |
4373 | int err; | |
4374 | ||
4375 | if (!dsl_dataset_is_zapified(ds)) | |
4376 | return (0); | |
4377 | ||
4378 | err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, | |
4379 | DS_FIELD_REMAP_DEADLIST, sizeof (remap_deadlist_obj), 1, | |
4380 | &remap_deadlist_obj); | |
4381 | ||
4382 | if (err != 0) { | |
4383 | VERIFY3S(err, ==, ENOENT); | |
4384 | return (0); | |
4385 | } | |
4386 | ||
4387 | ASSERT(remap_deadlist_obj != 0); | |
4388 | return (remap_deadlist_obj); | |
4389 | } | |
4390 | ||
4391 | boolean_t | |
4392 | dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds) | |
4393 | { | |
4394 | EQUIV(dsl_deadlist_is_open(&ds->ds_remap_deadlist), | |
4395 | dsl_dataset_get_remap_deadlist_object(ds) != 0); | |
4396 | return (dsl_deadlist_is_open(&ds->ds_remap_deadlist)); | |
4397 | } | |
4398 | ||
4399 | static void | |
4400 | dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, uint64_t obj, | |
4401 | dmu_tx_t *tx) | |
4402 | { | |
4403 | ASSERT(obj != 0); | |
4404 | dsl_dataset_zapify(ds, tx); | |
4405 | VERIFY0(zap_add(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, | |
4406 | DS_FIELD_REMAP_DEADLIST, sizeof (obj), 1, &obj, tx)); | |
4407 | } | |
4408 | ||
4409 | static void | |
4410 | dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4411 | { | |
4412 | VERIFY0(zap_remove(ds->ds_dir->dd_pool->dp_meta_objset, | |
4413 | ds->ds_object, DS_FIELD_REMAP_DEADLIST, tx)); | |
4414 | } | |
4415 | ||
4416 | void | |
4417 | dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4418 | { | |
4419 | uint64_t remap_deadlist_object; | |
4420 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
4421 | ||
4422 | ASSERT(dmu_tx_is_syncing(tx)); | |
4423 | ASSERT(dsl_dataset_remap_deadlist_exists(ds)); | |
4424 | ||
4425 | remap_deadlist_object = ds->ds_remap_deadlist.dl_object; | |
4426 | dsl_deadlist_close(&ds->ds_remap_deadlist); | |
4427 | dsl_deadlist_free(spa_meta_objset(spa), remap_deadlist_object, tx); | |
4428 | dsl_dataset_unset_remap_deadlist_object(ds, tx); | |
4429 | spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
4430 | } | |
4431 | ||
4432 | void | |
4433 | dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) | |
4434 | { | |
4435 | uint64_t remap_deadlist_obj; | |
4436 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
4437 | ||
4438 | ASSERT(dmu_tx_is_syncing(tx)); | |
4439 | ASSERT(MUTEX_HELD(&ds->ds_remap_deadlist_lock)); | |
4440 | /* | |
4441 | * Currently we only create remap deadlists when there are indirect | |
4442 | * vdevs with referenced mappings. | |
4443 | */ | |
4444 | ASSERT(spa_feature_is_active(spa, SPA_FEATURE_DEVICE_REMOVAL)); | |
4445 | ||
4446 | remap_deadlist_obj = dsl_deadlist_clone( | |
4447 | &ds->ds_deadlist, UINT64_MAX, | |
4448 | dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); | |
4449 | dsl_dataset_set_remap_deadlist_object(ds, | |
4450 | remap_deadlist_obj, tx); | |
4451 | dsl_deadlist_open(&ds->ds_remap_deadlist, spa_meta_objset(spa), | |
4452 | remap_deadlist_obj); | |
4453 | spa_feature_incr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
4454 | } | |
4455 | ||
93ce2b4c | 4456 | #if defined(_KERNEL) |
f1512ee6 MA |
4457 | #if defined(_LP64) |
4458 | module_param(zfs_max_recordsize, int, 0644); | |
4459 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
4460 | #else | |
4461 | /* Limited to 1M on 32-bit platforms due to lack of virtual address space */ | |
4462 | module_param(zfs_max_recordsize, int, 0444); | |
4463 | MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); | |
4464 | #endif | |
4465 | ||
c28b2279 | 4466 | EXPORT_SYMBOL(dsl_dataset_hold); |
b5256303 | 4467 | EXPORT_SYMBOL(dsl_dataset_hold_flags); |
c28b2279 | 4468 | EXPORT_SYMBOL(dsl_dataset_hold_obj); |
b5256303 | 4469 | EXPORT_SYMBOL(dsl_dataset_hold_obj_flags); |
c28b2279 BB |
4470 | EXPORT_SYMBOL(dsl_dataset_own); |
4471 | EXPORT_SYMBOL(dsl_dataset_own_obj); | |
4472 | EXPORT_SYMBOL(dsl_dataset_name); | |
4473 | EXPORT_SYMBOL(dsl_dataset_rele); | |
b5256303 | 4474 | EXPORT_SYMBOL(dsl_dataset_rele_flags); |
c28b2279 | 4475 | EXPORT_SYMBOL(dsl_dataset_disown); |
c28b2279 | 4476 | EXPORT_SYMBOL(dsl_dataset_tryown); |
c28b2279 BB |
4477 | EXPORT_SYMBOL(dsl_dataset_create_sync); |
4478 | EXPORT_SYMBOL(dsl_dataset_create_sync_dd); | |
c28b2279 BB |
4479 | EXPORT_SYMBOL(dsl_dataset_snapshot_check); |
4480 | EXPORT_SYMBOL(dsl_dataset_snapshot_sync); | |
c28b2279 | 4481 | EXPORT_SYMBOL(dsl_dataset_promote); |
c28b2279 BB |
4482 | EXPORT_SYMBOL(dsl_dataset_user_hold); |
4483 | EXPORT_SYMBOL(dsl_dataset_user_release); | |
c28b2279 BB |
4484 | EXPORT_SYMBOL(dsl_dataset_get_holds); |
4485 | EXPORT_SYMBOL(dsl_dataset_get_blkptr); | |
c28b2279 | 4486 | EXPORT_SYMBOL(dsl_dataset_get_spa); |
19580676 | 4487 | EXPORT_SYMBOL(dsl_dataset_modified_since_snap); |
330d06f9 MA |
4488 | EXPORT_SYMBOL(dsl_dataset_space_written); |
4489 | EXPORT_SYMBOL(dsl_dataset_space_wouldfree); | |
c28b2279 BB |
4490 | EXPORT_SYMBOL(dsl_dataset_sync); |
4491 | EXPORT_SYMBOL(dsl_dataset_block_born); | |
4492 | EXPORT_SYMBOL(dsl_dataset_block_kill); | |
c28b2279 BB |
4493 | EXPORT_SYMBOL(dsl_dataset_dirty); |
4494 | EXPORT_SYMBOL(dsl_dataset_stats); | |
4495 | EXPORT_SYMBOL(dsl_dataset_fast_stat); | |
4496 | EXPORT_SYMBOL(dsl_dataset_space); | |
4497 | EXPORT_SYMBOL(dsl_dataset_fsid_guid); | |
4498 | EXPORT_SYMBOL(dsl_dsobj_to_dsname); | |
4499 | EXPORT_SYMBOL(dsl_dataset_check_quota); | |
13fe0198 MA |
4500 | EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl); |
4501 | EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl); | |
c28b2279 | 4502 | #endif |