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13fe0198 MA |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
241b5415 | 23 | * Copyright (c) 2012, 2015 by Delphix. All rights reserved. |
95fd54a1 | 24 | * Copyright (c) 2013 Steven Hartland. All rights reserved. |
788eb90c | 25 | * Copyright (c) 2013 by Joyent, Inc. All rights reserved. |
a0bd735a | 26 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. |
13fe0198 MA |
27 | */ |
28 | ||
29 | #include <sys/zfs_context.h> | |
30 | #include <sys/dsl_userhold.h> | |
31 | #include <sys/dsl_dataset.h> | |
32 | #include <sys/dsl_synctask.h> | |
33 | #include <sys/dmu_tx.h> | |
34 | #include <sys/dsl_pool.h> | |
35 | #include <sys/dsl_dir.h> | |
36 | #include <sys/dmu_traverse.h> | |
37 | #include <sys/dsl_scan.h> | |
38 | #include <sys/dmu_objset.h> | |
39 | #include <sys/zap.h> | |
40 | #include <sys/zfeature.h> | |
41 | #include <sys/zfs_ioctl.h> | |
42 | #include <sys/dsl_deleg.h> | |
fa86b5db | 43 | #include <sys/dmu_impl.h> |
a0bd735a | 44 | #include <sys/zvol.h> |
13fe0198 MA |
45 | |
46 | typedef struct dmu_snapshots_destroy_arg { | |
47 | nvlist_t *dsda_snaps; | |
48 | nvlist_t *dsda_successful_snaps; | |
49 | boolean_t dsda_defer; | |
50 | nvlist_t *dsda_errlist; | |
51 | } dmu_snapshots_destroy_arg_t; | |
52 | ||
19580676 | 53 | int |
13fe0198 MA |
54 | dsl_destroy_snapshot_check_impl(dsl_dataset_t *ds, boolean_t defer) |
55 | { | |
0c66c32d | 56 | if (!ds->ds_is_snapshot) |
2e528b49 | 57 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
58 | |
59 | if (dsl_dataset_long_held(ds)) | |
2e528b49 | 60 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
61 | |
62 | /* | |
63 | * Only allow deferred destroy on pools that support it. | |
64 | * NOTE: deferred destroy is only supported on snapshots. | |
65 | */ | |
66 | if (defer) { | |
67 | if (spa_version(ds->ds_dir->dd_pool->dp_spa) < | |
68 | SPA_VERSION_USERREFS) | |
2e528b49 | 69 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
70 | return (0); |
71 | } | |
72 | ||
73 | /* | |
74 | * If this snapshot has an elevated user reference count, | |
75 | * we can't destroy it yet. | |
76 | */ | |
77 | if (ds->ds_userrefs > 0) | |
2e528b49 | 78 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
79 | |
80 | /* | |
81 | * Can't delete a branch point. | |
82 | */ | |
d683ddbb | 83 | if (dsl_dataset_phys(ds)->ds_num_children > 1) |
2e528b49 | 84 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
85 | |
86 | return (0); | |
87 | } | |
88 | ||
89 | static int | |
90 | dsl_destroy_snapshot_check(void *arg, dmu_tx_t *tx) | |
91 | { | |
92 | dmu_snapshots_destroy_arg_t *dsda = arg; | |
93 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
94 | nvpair_t *pair; | |
95 | int error = 0; | |
96 | ||
97 | if (!dmu_tx_is_syncing(tx)) | |
98 | return (0); | |
99 | ||
100 | for (pair = nvlist_next_nvpair(dsda->dsda_snaps, NULL); | |
101 | pair != NULL; pair = nvlist_next_nvpair(dsda->dsda_snaps, pair)) { | |
102 | dsl_dataset_t *ds; | |
103 | ||
104 | error = dsl_dataset_hold(dp, nvpair_name(pair), | |
105 | FTAG, &ds); | |
106 | ||
107 | /* | |
108 | * If the snapshot does not exist, silently ignore it | |
109 | * (it's "already destroyed"). | |
110 | */ | |
111 | if (error == ENOENT) | |
112 | continue; | |
113 | ||
114 | if (error == 0) { | |
115 | error = dsl_destroy_snapshot_check_impl(ds, | |
116 | dsda->dsda_defer); | |
117 | dsl_dataset_rele(ds, FTAG); | |
118 | } | |
119 | ||
120 | if (error == 0) { | |
121 | fnvlist_add_boolean(dsda->dsda_successful_snaps, | |
122 | nvpair_name(pair)); | |
123 | } else { | |
124 | fnvlist_add_int32(dsda->dsda_errlist, | |
125 | nvpair_name(pair), error); | |
126 | } | |
127 | } | |
128 | ||
129 | pair = nvlist_next_nvpair(dsda->dsda_errlist, NULL); | |
130 | if (pair != NULL) | |
131 | return (fnvpair_value_int32(pair)); | |
95fd54a1 | 132 | |
13fe0198 MA |
133 | return (0); |
134 | } | |
135 | ||
136 | struct process_old_arg { | |
137 | dsl_dataset_t *ds; | |
138 | dsl_dataset_t *ds_prev; | |
139 | boolean_t after_branch_point; | |
140 | zio_t *pio; | |
141 | uint64_t used, comp, uncomp; | |
142 | }; | |
143 | ||
144 | static int | |
145 | process_old_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) | |
146 | { | |
147 | struct process_old_arg *poa = arg; | |
148 | dsl_pool_t *dp = poa->ds->ds_dir->dd_pool; | |
149 | ||
b0bc7a84 MG |
150 | ASSERT(!BP_IS_HOLE(bp)); |
151 | ||
d683ddbb | 152 | if (bp->blk_birth <= dsl_dataset_phys(poa->ds)->ds_prev_snap_txg) { |
13fe0198 MA |
153 | dsl_deadlist_insert(&poa->ds->ds_deadlist, bp, tx); |
154 | if (poa->ds_prev && !poa->after_branch_point && | |
155 | bp->blk_birth > | |
d683ddbb JG |
156 | dsl_dataset_phys(poa->ds_prev)->ds_prev_snap_txg) { |
157 | dsl_dataset_phys(poa->ds_prev)->ds_unique_bytes += | |
13fe0198 MA |
158 | bp_get_dsize_sync(dp->dp_spa, bp); |
159 | } | |
160 | } else { | |
161 | poa->used += bp_get_dsize_sync(dp->dp_spa, bp); | |
162 | poa->comp += BP_GET_PSIZE(bp); | |
163 | poa->uncomp += BP_GET_UCSIZE(bp); | |
164 | dsl_free_sync(poa->pio, dp, tx->tx_txg, bp); | |
165 | } | |
166 | return (0); | |
167 | } | |
168 | ||
169 | static void | |
170 | process_old_deadlist(dsl_dataset_t *ds, dsl_dataset_t *ds_prev, | |
171 | dsl_dataset_t *ds_next, boolean_t after_branch_point, dmu_tx_t *tx) | |
172 | { | |
173 | struct process_old_arg poa = { 0 }; | |
174 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
175 | objset_t *mos = dp->dp_meta_objset; | |
176 | uint64_t deadlist_obj; | |
177 | ||
178 | ASSERT(ds->ds_deadlist.dl_oldfmt); | |
179 | ASSERT(ds_next->ds_deadlist.dl_oldfmt); | |
180 | ||
181 | poa.ds = ds; | |
182 | poa.ds_prev = ds_prev; | |
183 | poa.after_branch_point = after_branch_point; | |
184 | poa.pio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
185 | VERIFY0(bpobj_iterate(&ds_next->ds_deadlist.dl_bpobj, | |
186 | process_old_cb, &poa, tx)); | |
187 | VERIFY0(zio_wait(poa.pio)); | |
d683ddbb | 188 | ASSERT3U(poa.used, ==, dsl_dataset_phys(ds)->ds_unique_bytes); |
13fe0198 MA |
189 | |
190 | /* change snapused */ | |
191 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP, | |
192 | -poa.used, -poa.comp, -poa.uncomp, tx); | |
193 | ||
194 | /* swap next's deadlist to our deadlist */ | |
195 | dsl_deadlist_close(&ds->ds_deadlist); | |
196 | dsl_deadlist_close(&ds_next->ds_deadlist); | |
d683ddbb JG |
197 | deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; |
198 | dsl_dataset_phys(ds)->ds_deadlist_obj = | |
199 | dsl_dataset_phys(ds_next)->ds_deadlist_obj; | |
200 | dsl_dataset_phys(ds_next)->ds_deadlist_obj = deadlist_obj; | |
201 | dsl_deadlist_open(&ds->ds_deadlist, mos, | |
202 | dsl_dataset_phys(ds)->ds_deadlist_obj); | |
13fe0198 | 203 | dsl_deadlist_open(&ds_next->ds_deadlist, mos, |
d683ddbb | 204 | dsl_dataset_phys(ds_next)->ds_deadlist_obj); |
13fe0198 MA |
205 | } |
206 | ||
207 | static void | |
208 | dsl_dataset_remove_clones_key(dsl_dataset_t *ds, uint64_t mintxg, dmu_tx_t *tx) | |
209 | { | |
210 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
77831e17 KK |
211 | zap_cursor_t *zc; |
212 | zap_attribute_t *za; | |
13fe0198 MA |
213 | |
214 | /* | |
215 | * If it is the old version, dd_clones doesn't exist so we can't | |
216 | * find the clones, but dsl_deadlist_remove_key() is a no-op so it | |
217 | * doesn't matter. | |
218 | */ | |
d683ddbb | 219 | if (dsl_dir_phys(ds->ds_dir)->dd_clones == 0) |
13fe0198 MA |
220 | return; |
221 | ||
79c76d5b BB |
222 | zc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP); |
223 | za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); | |
77831e17 | 224 | |
d683ddbb | 225 | for (zap_cursor_init(zc, mos, dsl_dir_phys(ds->ds_dir)->dd_clones); |
77831e17 KK |
226 | zap_cursor_retrieve(zc, za) == 0; |
227 | zap_cursor_advance(zc)) { | |
13fe0198 MA |
228 | dsl_dataset_t *clone; |
229 | ||
230 | VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, | |
77831e17 | 231 | za->za_first_integer, FTAG, &clone)); |
13fe0198 MA |
232 | if (clone->ds_dir->dd_origin_txg > mintxg) { |
233 | dsl_deadlist_remove_key(&clone->ds_deadlist, | |
234 | mintxg, tx); | |
235 | dsl_dataset_remove_clones_key(clone, mintxg, tx); | |
236 | } | |
237 | dsl_dataset_rele(clone, FTAG); | |
238 | } | |
77831e17 KK |
239 | zap_cursor_fini(zc); |
240 | ||
241 | kmem_free(za, sizeof (zap_attribute_t)); | |
242 | kmem_free(zc, sizeof (zap_cursor_t)); | |
13fe0198 MA |
243 | } |
244 | ||
245 | void | |
246 | dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx) | |
247 | { | |
241b5415 | 248 | spa_feature_t f; |
13fe0198 MA |
249 | int after_branch_point = FALSE; |
250 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
251 | objset_t *mos = dp->dp_meta_objset; | |
252 | dsl_dataset_t *ds_prev = NULL; | |
253 | uint64_t obj, old_unique, used = 0, comp = 0, uncomp = 0; | |
254 | dsl_dataset_t *ds_next, *ds_head, *hds; | |
255 | ||
256 | ||
257 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); | |
cc9bb3e5 | 258 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 259 | ASSERT3U(dsl_dataset_phys(ds)->ds_bp.blk_birth, <=, tx->tx_txg); |
cc9bb3e5 | 260 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
13fe0198 MA |
261 | ASSERT(refcount_is_zero(&ds->ds_longholds)); |
262 | ||
263 | if (defer && | |
d683ddbb JG |
264 | (ds->ds_userrefs > 0 || |
265 | dsl_dataset_phys(ds)->ds_num_children > 1)) { | |
13fe0198 MA |
266 | ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS); |
267 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 268 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_DEFER_DESTROY; |
13fe0198 MA |
269 | spa_history_log_internal_ds(ds, "defer_destroy", tx, ""); |
270 | return; | |
271 | } | |
272 | ||
d683ddbb | 273 | ASSERT3U(dsl_dataset_phys(ds)->ds_num_children, <=, 1); |
13fe0198 MA |
274 | |
275 | /* We need to log before removing it from the namespace. */ | |
276 | spa_history_log_internal_ds(ds, "destroy", tx, ""); | |
277 | ||
278 | dsl_scan_ds_destroyed(ds, tx); | |
279 | ||
280 | obj = ds->ds_object; | |
281 | ||
241b5415 MA |
282 | for (f = 0; f < SPA_FEATURES; f++) { |
283 | if (ds->ds_feature_inuse[f]) { | |
284 | dsl_dataset_deactivate_feature(obj, f, tx); | |
285 | ds->ds_feature_inuse[f] = B_FALSE; | |
286 | } | |
f1512ee6 | 287 | } |
d683ddbb | 288 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 MA |
289 | ASSERT3P(ds->ds_prev, ==, NULL); |
290 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 291 | dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &ds_prev)); |
13fe0198 | 292 | after_branch_point = |
d683ddbb | 293 | (dsl_dataset_phys(ds_prev)->ds_next_snap_obj != obj); |
13fe0198 MA |
294 | |
295 | dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
296 | if (after_branch_point && | |
d683ddbb | 297 | dsl_dataset_phys(ds_prev)->ds_next_clones_obj != 0) { |
13fe0198 | 298 | dsl_dataset_remove_from_next_clones(ds_prev, obj, tx); |
d683ddbb | 299 | if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) { |
13fe0198 | 300 | VERIFY0(zap_add_int(mos, |
d683ddbb JG |
301 | dsl_dataset_phys(ds_prev)-> |
302 | ds_next_clones_obj, | |
303 | dsl_dataset_phys(ds)->ds_next_snap_obj, | |
304 | tx)); | |
13fe0198 MA |
305 | } |
306 | } | |
307 | if (!after_branch_point) { | |
d683ddbb JG |
308 | dsl_dataset_phys(ds_prev)->ds_next_snap_obj = |
309 | dsl_dataset_phys(ds)->ds_next_snap_obj; | |
13fe0198 MA |
310 | } |
311 | } | |
312 | ||
313 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb JG |
314 | dsl_dataset_phys(ds)->ds_next_snap_obj, FTAG, &ds_next)); |
315 | ASSERT3U(dsl_dataset_phys(ds_next)->ds_prev_snap_obj, ==, obj); | |
13fe0198 | 316 | |
d683ddbb | 317 | old_unique = dsl_dataset_phys(ds_next)->ds_unique_bytes; |
13fe0198 MA |
318 | |
319 | dmu_buf_will_dirty(ds_next->ds_dbuf, tx); | |
d683ddbb JG |
320 | dsl_dataset_phys(ds_next)->ds_prev_snap_obj = |
321 | dsl_dataset_phys(ds)->ds_prev_snap_obj; | |
322 | dsl_dataset_phys(ds_next)->ds_prev_snap_txg = | |
323 | dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
324 | ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, | |
325 | ds_prev ? dsl_dataset_phys(ds_prev)->ds_creation_txg : 0); | |
13fe0198 MA |
326 | |
327 | if (ds_next->ds_deadlist.dl_oldfmt) { | |
328 | process_old_deadlist(ds, ds_prev, ds_next, | |
329 | after_branch_point, tx); | |
330 | } else { | |
331 | /* Adjust prev's unique space. */ | |
332 | if (ds_prev && !after_branch_point) { | |
333 | dsl_deadlist_space_range(&ds_next->ds_deadlist, | |
d683ddbb JG |
334 | dsl_dataset_phys(ds_prev)->ds_prev_snap_txg, |
335 | dsl_dataset_phys(ds)->ds_prev_snap_txg, | |
13fe0198 | 336 | &used, &comp, &uncomp); |
d683ddbb | 337 | dsl_dataset_phys(ds_prev)->ds_unique_bytes += used; |
13fe0198 MA |
338 | } |
339 | ||
340 | /* Adjust snapused. */ | |
341 | dsl_deadlist_space_range(&ds_next->ds_deadlist, | |
d683ddbb | 342 | dsl_dataset_phys(ds)->ds_prev_snap_txg, UINT64_MAX, |
13fe0198 MA |
343 | &used, &comp, &uncomp); |
344 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP, | |
345 | -used, -comp, -uncomp, tx); | |
346 | ||
347 | /* Move blocks to be freed to pool's free list. */ | |
348 | dsl_deadlist_move_bpobj(&ds_next->ds_deadlist, | |
d683ddbb | 349 | &dp->dp_free_bpobj, dsl_dataset_phys(ds)->ds_prev_snap_txg, |
13fe0198 MA |
350 | tx); |
351 | dsl_dir_diduse_space(tx->tx_pool->dp_free_dir, | |
352 | DD_USED_HEAD, used, comp, uncomp, tx); | |
353 | ||
354 | /* Merge our deadlist into next's and free it. */ | |
355 | dsl_deadlist_merge(&ds_next->ds_deadlist, | |
d683ddbb | 356 | dsl_dataset_phys(ds)->ds_deadlist_obj, tx); |
13fe0198 MA |
357 | } |
358 | dsl_deadlist_close(&ds->ds_deadlist); | |
d683ddbb | 359 | dsl_deadlist_free(mos, dsl_dataset_phys(ds)->ds_deadlist_obj, tx); |
13fe0198 | 360 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb | 361 | dsl_dataset_phys(ds)->ds_deadlist_obj = 0; |
13fe0198 MA |
362 | |
363 | /* Collapse range in clone heads */ | |
364 | dsl_dataset_remove_clones_key(ds, | |
d683ddbb | 365 | dsl_dataset_phys(ds)->ds_creation_txg, tx); |
13fe0198 | 366 | |
0c66c32d | 367 | if (ds_next->ds_is_snapshot) { |
13fe0198 MA |
368 | dsl_dataset_t *ds_nextnext; |
369 | ||
370 | /* | |
371 | * Update next's unique to include blocks which | |
372 | * were previously shared by only this snapshot | |
373 | * and it. Those blocks will be born after the | |
374 | * prev snap and before this snap, and will have | |
375 | * died after the next snap and before the one | |
376 | * after that (ie. be on the snap after next's | |
377 | * deadlist). | |
378 | */ | |
379 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb JG |
380 | dsl_dataset_phys(ds_next)->ds_next_snap_obj, |
381 | FTAG, &ds_nextnext)); | |
13fe0198 | 382 | dsl_deadlist_space_range(&ds_nextnext->ds_deadlist, |
d683ddbb JG |
383 | dsl_dataset_phys(ds)->ds_prev_snap_txg, |
384 | dsl_dataset_phys(ds)->ds_creation_txg, | |
13fe0198 | 385 | &used, &comp, &uncomp); |
d683ddbb | 386 | dsl_dataset_phys(ds_next)->ds_unique_bytes += used; |
13fe0198 MA |
387 | dsl_dataset_rele(ds_nextnext, FTAG); |
388 | ASSERT3P(ds_next->ds_prev, ==, NULL); | |
389 | ||
390 | /* Collapse range in this head. */ | |
391 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 392 | dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, FTAG, &hds)); |
13fe0198 | 393 | dsl_deadlist_remove_key(&hds->ds_deadlist, |
d683ddbb | 394 | dsl_dataset_phys(ds)->ds_creation_txg, tx); |
13fe0198 MA |
395 | dsl_dataset_rele(hds, FTAG); |
396 | ||
397 | } else { | |
398 | ASSERT3P(ds_next->ds_prev, ==, ds); | |
399 | dsl_dataset_rele(ds_next->ds_prev, ds_next); | |
400 | ds_next->ds_prev = NULL; | |
401 | if (ds_prev) { | |
402 | VERIFY0(dsl_dataset_hold_obj(dp, | |
d683ddbb | 403 | dsl_dataset_phys(ds)->ds_prev_snap_obj, |
13fe0198 MA |
404 | ds_next, &ds_next->ds_prev)); |
405 | } | |
406 | ||
407 | dsl_dataset_recalc_head_uniq(ds_next); | |
408 | ||
409 | /* | |
410 | * Reduce the amount of our unconsumed refreservation | |
411 | * being charged to our parent by the amount of | |
412 | * new unique data we have gained. | |
413 | */ | |
414 | if (old_unique < ds_next->ds_reserved) { | |
415 | int64_t mrsdelta; | |
416 | uint64_t new_unique = | |
d683ddbb | 417 | dsl_dataset_phys(ds_next)->ds_unique_bytes; |
13fe0198 MA |
418 | |
419 | ASSERT(old_unique <= new_unique); | |
420 | mrsdelta = MIN(new_unique - old_unique, | |
421 | ds_next->ds_reserved - old_unique); | |
422 | dsl_dir_diduse_space(ds->ds_dir, | |
423 | DD_USED_REFRSRV, -mrsdelta, 0, 0, tx); | |
424 | } | |
425 | } | |
426 | dsl_dataset_rele(ds_next, FTAG); | |
427 | ||
428 | /* | |
429 | * This must be done after the dsl_traverse(), because it will | |
430 | * re-open the objset. | |
431 | */ | |
432 | if (ds->ds_objset) { | |
433 | dmu_objset_evict(ds->ds_objset); | |
434 | ds->ds_objset = NULL; | |
435 | } | |
436 | ||
437 | /* remove from snapshot namespace */ | |
d683ddbb | 438 | ASSERT(dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0); |
13fe0198 | 439 | VERIFY0(dsl_dataset_hold_obj(dp, |
d683ddbb | 440 | dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, FTAG, &ds_head)); |
13fe0198 MA |
441 | VERIFY0(dsl_dataset_get_snapname(ds)); |
442 | #ifdef ZFS_DEBUG | |
443 | { | |
444 | uint64_t val; | |
a0bd735a | 445 | int err; |
13fe0198 MA |
446 | |
447 | err = dsl_dataset_snap_lookup(ds_head, | |
448 | ds->ds_snapname, &val); | |
449 | ASSERT0(err); | |
450 | ASSERT3U(val, ==, obj); | |
451 | } | |
452 | #endif | |
788eb90c | 453 | VERIFY0(dsl_dataset_snap_remove(ds_head, ds->ds_snapname, tx, B_TRUE)); |
13fe0198 MA |
454 | dsl_dataset_rele(ds_head, FTAG); |
455 | ||
456 | if (ds_prev != NULL) | |
457 | dsl_dataset_rele(ds_prev, FTAG); | |
458 | ||
459 | spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); | |
460 | ||
d683ddbb | 461 | if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { |
13fe0198 MA |
462 | ASSERTV(uint64_t count); |
463 | ASSERT0(zap_count(mos, | |
d683ddbb JG |
464 | dsl_dataset_phys(ds)->ds_next_clones_obj, &count) && |
465 | count == 0); | |
13fe0198 | 466 | VERIFY0(dmu_object_free(mos, |
d683ddbb | 467 | dsl_dataset_phys(ds)->ds_next_clones_obj, tx)); |
13fe0198 | 468 | } |
d683ddbb JG |
469 | if (dsl_dataset_phys(ds)->ds_props_obj != 0) |
470 | VERIFY0(zap_destroy(mos, dsl_dataset_phys(ds)->ds_props_obj, | |
471 | tx)); | |
472 | if (dsl_dataset_phys(ds)->ds_userrefs_obj != 0) | |
473 | VERIFY0(zap_destroy(mos, dsl_dataset_phys(ds)->ds_userrefs_obj, | |
474 | tx)); | |
13fe0198 MA |
475 | dsl_dir_rele(ds->ds_dir, ds); |
476 | ds->ds_dir = NULL; | |
fa86b5db | 477 | dmu_object_free_zapified(mos, obj, tx); |
13fe0198 MA |
478 | } |
479 | ||
480 | static void | |
481 | dsl_destroy_snapshot_sync(void *arg, dmu_tx_t *tx) | |
482 | { | |
483 | dmu_snapshots_destroy_arg_t *dsda = arg; | |
484 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
485 | nvpair_t *pair; | |
486 | ||
487 | for (pair = nvlist_next_nvpair(dsda->dsda_successful_snaps, NULL); | |
488 | pair != NULL; | |
489 | pair = nvlist_next_nvpair(dsda->dsda_successful_snaps, pair)) { | |
490 | dsl_dataset_t *ds; | |
491 | ||
492 | VERIFY0(dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds)); | |
493 | ||
494 | dsl_destroy_snapshot_sync_impl(ds, dsda->dsda_defer, tx); | |
a0bd735a | 495 | zvol_remove_minors(dp->dp_spa, nvpair_name(pair), B_TRUE); |
13fe0198 MA |
496 | dsl_dataset_rele(ds, FTAG); |
497 | } | |
498 | } | |
499 | ||
500 | /* | |
501 | * The semantics of this function are described in the comment above | |
502 | * lzc_destroy_snaps(). To summarize: | |
503 | * | |
504 | * The snapshots must all be in the same pool. | |
505 | * | |
506 | * Snapshots that don't exist will be silently ignored (considered to be | |
507 | * "already deleted"). | |
508 | * | |
509 | * On success, all snaps will be destroyed and this will return 0. | |
510 | * On failure, no snaps will be destroyed, the errlist will be filled in, | |
511 | * and this will return an errno. | |
512 | */ | |
513 | int | |
514 | dsl_destroy_snapshots_nvl(nvlist_t *snaps, boolean_t defer, | |
515 | nvlist_t *errlist) | |
516 | { | |
517 | dmu_snapshots_destroy_arg_t dsda; | |
518 | int error; | |
519 | nvpair_t *pair; | |
520 | ||
521 | pair = nvlist_next_nvpair(snaps, NULL); | |
522 | if (pair == NULL) | |
523 | return (0); | |
524 | ||
525 | dsda.dsda_snaps = snaps; | |
d1d7e268 | 526 | VERIFY0(nvlist_alloc(&dsda.dsda_successful_snaps, |
79c76d5b | 527 | NV_UNIQUE_NAME, KM_SLEEP)); |
13fe0198 MA |
528 | dsda.dsda_defer = defer; |
529 | dsda.dsda_errlist = errlist; | |
530 | ||
531 | error = dsl_sync_task(nvpair_name(pair), | |
532 | dsl_destroy_snapshot_check, dsl_destroy_snapshot_sync, | |
3d45fdd6 | 533 | &dsda, 0, ZFS_SPACE_CHECK_NONE); |
13fe0198 MA |
534 | fnvlist_free(dsda.dsda_successful_snaps); |
535 | ||
536 | return (error); | |
537 | } | |
538 | ||
539 | int | |
540 | dsl_destroy_snapshot(const char *name, boolean_t defer) | |
541 | { | |
542 | int error; | |
79c76d5b BB |
543 | nvlist_t *nvl = fnvlist_alloc(); |
544 | nvlist_t *errlist = fnvlist_alloc(); | |
13fe0198 MA |
545 | |
546 | fnvlist_add_boolean(nvl, name); | |
547 | error = dsl_destroy_snapshots_nvl(nvl, defer, errlist); | |
548 | fnvlist_free(errlist); | |
549 | fnvlist_free(nvl); | |
550 | return (error); | |
551 | } | |
552 | ||
553 | struct killarg { | |
554 | dsl_dataset_t *ds; | |
555 | dmu_tx_t *tx; | |
556 | }; | |
557 | ||
558 | /* ARGSUSED */ | |
559 | static int | |
560 | kill_blkptr(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
5dbd68a3 | 561 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) |
13fe0198 MA |
562 | { |
563 | struct killarg *ka = arg; | |
564 | dmu_tx_t *tx = ka->tx; | |
565 | ||
fcff0f35 | 566 | if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) |
13fe0198 MA |
567 | return (0); |
568 | ||
569 | if (zb->zb_level == ZB_ZIL_LEVEL) { | |
570 | ASSERT(zilog != NULL); | |
571 | /* | |
572 | * It's a block in the intent log. It has no | |
573 | * accounting, so just free it. | |
574 | */ | |
575 | dsl_free(ka->tx->tx_pool, ka->tx->tx_txg, bp); | |
576 | } else { | |
577 | ASSERT(zilog == NULL); | |
d683ddbb JG |
578 | ASSERT3U(bp->blk_birth, >, |
579 | dsl_dataset_phys(ka->ds)->ds_prev_snap_txg); | |
13fe0198 MA |
580 | (void) dsl_dataset_block_kill(ka->ds, bp, tx, B_FALSE); |
581 | } | |
582 | ||
583 | return (0); | |
584 | } | |
585 | ||
586 | static void | |
587 | old_synchronous_dataset_destroy(dsl_dataset_t *ds, dmu_tx_t *tx) | |
588 | { | |
589 | struct killarg ka; | |
590 | ||
591 | /* | |
592 | * Free everything that we point to (that's born after | |
593 | * the previous snapshot, if we are a clone) | |
594 | * | |
595 | * NB: this should be very quick, because we already | |
596 | * freed all the objects in open context. | |
597 | */ | |
598 | ka.ds = ds; | |
599 | ka.tx = tx; | |
600 | VERIFY0(traverse_dataset(ds, | |
b5256303 TC |
601 | dsl_dataset_phys(ds)->ds_prev_snap_txg, TRAVERSE_POST | |
602 | TRAVERSE_NO_DECRYPT, kill_blkptr, &ka)); | |
d683ddbb JG |
603 | ASSERT(!DS_UNIQUE_IS_ACCURATE(ds) || |
604 | dsl_dataset_phys(ds)->ds_unique_bytes == 0); | |
13fe0198 MA |
605 | } |
606 | ||
607 | typedef struct dsl_destroy_head_arg { | |
608 | const char *ddha_name; | |
609 | } dsl_destroy_head_arg_t; | |
610 | ||
611 | int | |
612 | dsl_destroy_head_check_impl(dsl_dataset_t *ds, int expected_holds) | |
613 | { | |
614 | int error; | |
615 | uint64_t count; | |
616 | objset_t *mos; | |
617 | ||
0c66c32d JG |
618 | ASSERT(!ds->ds_is_snapshot); |
619 | if (ds->ds_is_snapshot) | |
2e528b49 | 620 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
621 | |
622 | if (refcount_count(&ds->ds_longholds) != expected_holds) | |
2e528b49 | 623 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
624 | |
625 | mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
626 | ||
627 | /* | |
628 | * Can't delete a head dataset if there are snapshots of it. | |
629 | * (Except if the only snapshots are from the branch we cloned | |
630 | * from.) | |
631 | */ | |
632 | if (ds->ds_prev != NULL && | |
d683ddbb | 633 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == ds->ds_object) |
2e528b49 | 634 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
635 | |
636 | /* | |
637 | * Can't delete if there are children of this fs. | |
638 | */ | |
639 | error = zap_count(mos, | |
d683ddbb | 640 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, &count); |
13fe0198 MA |
641 | if (error != 0) |
642 | return (error); | |
643 | if (count != 0) | |
2e528b49 | 644 | return (SET_ERROR(EEXIST)); |
13fe0198 MA |
645 | |
646 | if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev) && | |
d683ddbb | 647 | dsl_dataset_phys(ds->ds_prev)->ds_num_children == 2 && |
13fe0198 MA |
648 | ds->ds_prev->ds_userrefs == 0) { |
649 | /* We need to remove the origin snapshot as well. */ | |
650 | if (!refcount_is_zero(&ds->ds_prev->ds_longholds)) | |
2e528b49 | 651 | return (SET_ERROR(EBUSY)); |
13fe0198 MA |
652 | } |
653 | return (0); | |
654 | } | |
655 | ||
656 | static int | |
657 | dsl_destroy_head_check(void *arg, dmu_tx_t *tx) | |
658 | { | |
659 | dsl_destroy_head_arg_t *ddha = arg; | |
660 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
661 | dsl_dataset_t *ds; | |
662 | int error; | |
663 | ||
664 | error = dsl_dataset_hold(dp, ddha->ddha_name, FTAG, &ds); | |
665 | if (error != 0) | |
666 | return (error); | |
667 | ||
668 | error = dsl_destroy_head_check_impl(ds, 0); | |
669 | dsl_dataset_rele(ds, FTAG); | |
670 | return (error); | |
671 | } | |
672 | ||
673 | static void | |
674 | dsl_dir_destroy_sync(uint64_t ddobj, dmu_tx_t *tx) | |
675 | { | |
676 | dsl_dir_t *dd; | |
677 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
678 | objset_t *mos = dp->dp_meta_objset; | |
679 | dd_used_t t; | |
680 | ||
681 | ASSERT(RRW_WRITE_HELD(&dmu_tx_pool(tx)->dp_config_rwlock)); | |
682 | ||
683 | VERIFY0(dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd)); | |
684 | ||
d683ddbb | 685 | ASSERT0(dsl_dir_phys(dd)->dd_head_dataset_obj); |
13fe0198 | 686 | |
788eb90c JJ |
687 | /* |
688 | * Decrement the filesystem count for all parent filesystems. | |
689 | * | |
690 | * When we receive an incremental stream into a filesystem that already | |
691 | * exists, a temporary clone is created. We never count this temporary | |
692 | * clone, whose name begins with a '%'. | |
693 | */ | |
694 | if (dd->dd_myname[0] != '%' && dd->dd_parent != NULL) | |
695 | dsl_fs_ss_count_adjust(dd->dd_parent, -1, | |
696 | DD_FIELD_FILESYSTEM_COUNT, tx); | |
697 | ||
13fe0198 MA |
698 | /* |
699 | * Remove our reservation. The impl() routine avoids setting the | |
700 | * actual property, which would require the (already destroyed) ds. | |
701 | */ | |
702 | dsl_dir_set_reservation_sync_impl(dd, 0, tx); | |
703 | ||
d683ddbb JG |
704 | ASSERT0(dsl_dir_phys(dd)->dd_used_bytes); |
705 | ASSERT0(dsl_dir_phys(dd)->dd_reserved); | |
13fe0198 | 706 | for (t = 0; t < DD_USED_NUM; t++) |
d683ddbb | 707 | ASSERT0(dsl_dir_phys(dd)->dd_used_breakdown[t]); |
13fe0198 | 708 | |
b5256303 TC |
709 | if (dd->dd_crypto_obj != 0) { |
710 | dsl_crypto_key_destroy_sync(dd->dd_crypto_obj, tx); | |
711 | (void) spa_keystore_unload_wkey_impl(dp->dp_spa, dd->dd_object); | |
712 | } | |
713 | ||
d683ddbb JG |
714 | VERIFY0(zap_destroy(mos, dsl_dir_phys(dd)->dd_child_dir_zapobj, tx)); |
715 | VERIFY0(zap_destroy(mos, dsl_dir_phys(dd)->dd_props_zapobj, tx)); | |
716 | VERIFY0(dsl_deleg_destroy(mos, dsl_dir_phys(dd)->dd_deleg_zapobj, tx)); | |
13fe0198 | 717 | VERIFY0(zap_remove(mos, |
d683ddbb JG |
718 | dsl_dir_phys(dd->dd_parent)->dd_child_dir_zapobj, |
719 | dd->dd_myname, tx)); | |
13fe0198 MA |
720 | |
721 | dsl_dir_rele(dd, FTAG); | |
fa86b5db | 722 | dmu_object_free_zapified(mos, ddobj, tx); |
13fe0198 MA |
723 | } |
724 | ||
725 | void | |
726 | dsl_destroy_head_sync_impl(dsl_dataset_t *ds, dmu_tx_t *tx) | |
727 | { | |
728 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
241b5415 | 729 | spa_feature_t f; |
13fe0198 MA |
730 | objset_t *mos = dp->dp_meta_objset; |
731 | uint64_t obj, ddobj, prevobj = 0; | |
732 | boolean_t rmorigin; | |
13fe0198 MA |
733 | objset_t *os; |
734 | ||
d683ddbb | 735 | ASSERT3U(dsl_dataset_phys(ds)->ds_num_children, <=, 1); |
13fe0198 | 736 | ASSERT(ds->ds_prev == NULL || |
d683ddbb | 737 | dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj != ds->ds_object); |
cc9bb3e5 | 738 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
d683ddbb | 739 | ASSERT3U(dsl_dataset_phys(ds)->ds_bp.blk_birth, <=, tx->tx_txg); |
cc9bb3e5 | 740 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
13fe0198 MA |
741 | ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); |
742 | ||
743 | /* We need to log before removing it from the namespace. */ | |
744 | spa_history_log_internal_ds(ds, "destroy", tx, ""); | |
745 | ||
746 | rmorigin = (dsl_dir_is_clone(ds->ds_dir) && | |
747 | DS_IS_DEFER_DESTROY(ds->ds_prev) && | |
d683ddbb | 748 | dsl_dataset_phys(ds->ds_prev)->ds_num_children == 2 && |
13fe0198 MA |
749 | ds->ds_prev->ds_userrefs == 0); |
750 | ||
9b67f605 | 751 | /* Remove our reservation. */ |
13fe0198 MA |
752 | if (ds->ds_reserved != 0) { |
753 | dsl_dataset_set_refreservation_sync_impl(ds, | |
754 | (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED), | |
755 | 0, tx); | |
756 | ASSERT0(ds->ds_reserved); | |
757 | } | |
758 | ||
241b5415 | 759 | obj = ds->ds_object; |
f1512ee6 | 760 | |
241b5415 MA |
761 | for (f = 0; f < SPA_FEATURES; f++) { |
762 | if (ds->ds_feature_inuse[f]) { | |
763 | dsl_dataset_deactivate_feature(obj, f, tx); | |
764 | ds->ds_feature_inuse[f] = B_FALSE; | |
765 | } | |
766 | } | |
13fe0198 | 767 | |
241b5415 | 768 | dsl_scan_ds_destroyed(ds, tx); |
13fe0198 | 769 | |
d683ddbb | 770 | if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { |
13fe0198 MA |
771 | /* This is a clone */ |
772 | ASSERT(ds->ds_prev != NULL); | |
d683ddbb JG |
773 | ASSERT3U(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj, !=, |
774 | obj); | |
775 | ASSERT0(dsl_dataset_phys(ds)->ds_next_snap_obj); | |
13fe0198 MA |
776 | |
777 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
d683ddbb | 778 | if (dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj != 0) { |
13fe0198 MA |
779 | dsl_dataset_remove_from_next_clones(ds->ds_prev, |
780 | obj, tx); | |
781 | } | |
782 | ||
d683ddbb JG |
783 | ASSERT3U(dsl_dataset_phys(ds->ds_prev)->ds_num_children, >, 1); |
784 | dsl_dataset_phys(ds->ds_prev)->ds_num_children--; | |
13fe0198 MA |
785 | } |
786 | ||
13fe0198 MA |
787 | /* |
788 | * Destroy the deadlist. Unless it's a clone, the | |
789 | * deadlist should be empty. (If it's a clone, it's | |
790 | * safe to ignore the deadlist contents.) | |
791 | */ | |
792 | dsl_deadlist_close(&ds->ds_deadlist); | |
d683ddbb | 793 | dsl_deadlist_free(mos, dsl_dataset_phys(ds)->ds_deadlist_obj, tx); |
13fe0198 | 794 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb | 795 | dsl_dataset_phys(ds)->ds_deadlist_obj = 0; |
13fe0198 MA |
796 | |
797 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
798 | ||
fa86b5db | 799 | if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_ASYNC_DESTROY)) { |
13fe0198 MA |
800 | old_synchronous_dataset_destroy(ds, tx); |
801 | } else { | |
802 | /* | |
803 | * Move the bptree into the pool's list of trees to | |
804 | * clean up and update space accounting information. | |
805 | */ | |
806 | uint64_t used, comp, uncomp; | |
807 | ||
808 | zil_destroy_sync(dmu_objset_zil(os), tx); | |
809 | ||
fa86b5db MA |
810 | if (!spa_feature_is_active(dp->dp_spa, |
811 | SPA_FEATURE_ASYNC_DESTROY)) { | |
2696dfaf | 812 | dsl_scan_t *scn = dp->dp_scan; |
fa86b5db MA |
813 | spa_feature_incr(dp->dp_spa, SPA_FEATURE_ASYNC_DESTROY, |
814 | tx); | |
13fe0198 MA |
815 | dp->dp_bptree_obj = bptree_alloc(mos, tx); |
816 | VERIFY0(zap_add(mos, | |
817 | DMU_POOL_DIRECTORY_OBJECT, | |
818 | DMU_POOL_BPTREE_OBJ, sizeof (uint64_t), 1, | |
819 | &dp->dp_bptree_obj, tx)); | |
2696dfaf GW |
820 | ASSERT(!scn->scn_async_destroying); |
821 | scn->scn_async_destroying = B_TRUE; | |
13fe0198 MA |
822 | } |
823 | ||
d683ddbb JG |
824 | used = dsl_dir_phys(ds->ds_dir)->dd_used_bytes; |
825 | comp = dsl_dir_phys(ds->ds_dir)->dd_compressed_bytes; | |
826 | uncomp = dsl_dir_phys(ds->ds_dir)->dd_uncompressed_bytes; | |
13fe0198 MA |
827 | |
828 | ASSERT(!DS_UNIQUE_IS_ACCURATE(ds) || | |
d683ddbb | 829 | dsl_dataset_phys(ds)->ds_unique_bytes == used); |
13fe0198 | 830 | |
cc9bb3e5 | 831 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
13fe0198 | 832 | bptree_add(mos, dp->dp_bptree_obj, |
d683ddbb JG |
833 | &dsl_dataset_phys(ds)->ds_bp, |
834 | dsl_dataset_phys(ds)->ds_prev_snap_txg, | |
13fe0198 | 835 | used, comp, uncomp, tx); |
cc9bb3e5 | 836 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
13fe0198 MA |
837 | dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, |
838 | -used, -comp, -uncomp, tx); | |
839 | dsl_dir_diduse_space(dp->dp_free_dir, DD_USED_HEAD, | |
840 | used, comp, uncomp, tx); | |
841 | } | |
842 | ||
843 | if (ds->ds_prev != NULL) { | |
844 | if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { | |
845 | VERIFY0(zap_remove_int(mos, | |
d683ddbb | 846 | dsl_dir_phys(ds->ds_prev->ds_dir)->dd_clones, |
13fe0198 MA |
847 | ds->ds_object, tx)); |
848 | } | |
849 | prevobj = ds->ds_prev->ds_object; | |
850 | dsl_dataset_rele(ds->ds_prev, ds); | |
851 | ds->ds_prev = NULL; | |
852 | } | |
853 | ||
854 | /* | |
855 | * This must be done after the dsl_traverse(), because it will | |
856 | * re-open the objset. | |
857 | */ | |
858 | if (ds->ds_objset) { | |
859 | dmu_objset_evict(ds->ds_objset); | |
860 | ds->ds_objset = NULL; | |
861 | } | |
862 | ||
863 | /* Erase the link in the dir */ | |
864 | dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); | |
d683ddbb | 865 | dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj = 0; |
13fe0198 | 866 | ddobj = ds->ds_dir->dd_object; |
d683ddbb JG |
867 | ASSERT(dsl_dataset_phys(ds)->ds_snapnames_zapobj != 0); |
868 | VERIFY0(zap_destroy(mos, | |
869 | dsl_dataset_phys(ds)->ds_snapnames_zapobj, tx)); | |
13fe0198 | 870 | |
da536844 | 871 | if (ds->ds_bookmarks != 0) { |
d683ddbb | 872 | VERIFY0(zap_destroy(mos, ds->ds_bookmarks, tx)); |
da536844 MA |
873 | spa_feature_decr(dp->dp_spa, SPA_FEATURE_BOOKMARKS, tx); |
874 | } | |
875 | ||
13fe0198 MA |
876 | spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
877 | ||
d683ddbb JG |
878 | ASSERT0(dsl_dataset_phys(ds)->ds_next_clones_obj); |
879 | ASSERT0(dsl_dataset_phys(ds)->ds_props_obj); | |
880 | ASSERT0(dsl_dataset_phys(ds)->ds_userrefs_obj); | |
13fe0198 MA |
881 | dsl_dir_rele(ds->ds_dir, ds); |
882 | ds->ds_dir = NULL; | |
fa86b5db | 883 | dmu_object_free_zapified(mos, obj, tx); |
13fe0198 MA |
884 | |
885 | dsl_dir_destroy_sync(ddobj, tx); | |
886 | ||
887 | if (rmorigin) { | |
888 | dsl_dataset_t *prev; | |
889 | VERIFY0(dsl_dataset_hold_obj(dp, prevobj, FTAG, &prev)); | |
890 | dsl_destroy_snapshot_sync_impl(prev, B_FALSE, tx); | |
891 | dsl_dataset_rele(prev, FTAG); | |
892 | } | |
893 | } | |
894 | ||
895 | static void | |
896 | dsl_destroy_head_sync(void *arg, dmu_tx_t *tx) | |
897 | { | |
898 | dsl_destroy_head_arg_t *ddha = arg; | |
899 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
900 | dsl_dataset_t *ds; | |
901 | ||
902 | VERIFY0(dsl_dataset_hold(dp, ddha->ddha_name, FTAG, &ds)); | |
903 | dsl_destroy_head_sync_impl(ds, tx); | |
a0bd735a | 904 | zvol_remove_minors(dp->dp_spa, ddha->ddha_name, B_TRUE); |
13fe0198 MA |
905 | dsl_dataset_rele(ds, FTAG); |
906 | } | |
907 | ||
908 | static void | |
909 | dsl_destroy_head_begin_sync(void *arg, dmu_tx_t *tx) | |
910 | { | |
911 | dsl_destroy_head_arg_t *ddha = arg; | |
912 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
913 | dsl_dataset_t *ds; | |
914 | ||
915 | VERIFY0(dsl_dataset_hold(dp, ddha->ddha_name, FTAG, &ds)); | |
916 | ||
917 | /* Mark it as inconsistent on-disk, in case we crash */ | |
918 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
d683ddbb | 919 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; |
13fe0198 MA |
920 | |
921 | spa_history_log_internal_ds(ds, "destroy begin", tx, ""); | |
922 | dsl_dataset_rele(ds, FTAG); | |
923 | } | |
924 | ||
925 | int | |
926 | dsl_destroy_head(const char *name) | |
927 | { | |
928 | dsl_destroy_head_arg_t ddha; | |
929 | int error; | |
930 | spa_t *spa; | |
931 | boolean_t isenabled; | |
932 | ||
933 | #ifdef _KERNEL | |
934 | zfs_destroy_unmount_origin(name); | |
935 | #endif | |
936 | ||
937 | error = spa_open(name, &spa, FTAG); | |
938 | if (error != 0) | |
939 | return (error); | |
fa86b5db | 940 | isenabled = spa_feature_is_enabled(spa, SPA_FEATURE_ASYNC_DESTROY); |
13fe0198 MA |
941 | spa_close(spa, FTAG); |
942 | ||
943 | ddha.ddha_name = name; | |
944 | ||
945 | if (!isenabled) { | |
946 | objset_t *os; | |
947 | ||
948 | error = dsl_sync_task(name, dsl_destroy_head_check, | |
3d45fdd6 MA |
949 | dsl_destroy_head_begin_sync, &ddha, |
950 | 0, ZFS_SPACE_CHECK_NONE); | |
13fe0198 MA |
951 | if (error != 0) |
952 | return (error); | |
953 | ||
954 | /* | |
955 | * Head deletion is processed in one txg on old pools; | |
956 | * remove the objects from open context so that the txg sync | |
957 | * is not too long. | |
958 | */ | |
b5256303 TC |
959 | error = dmu_objset_own(name, DMU_OST_ANY, B_FALSE, B_FALSE, |
960 | FTAG, &os); | |
13fe0198 MA |
961 | if (error == 0) { |
962 | uint64_t obj; | |
963 | uint64_t prev_snap_txg = | |
d683ddbb JG |
964 | dsl_dataset_phys(dmu_objset_ds(os))-> |
965 | ds_prev_snap_txg; | |
13fe0198 MA |
966 | for (obj = 0; error == 0; |
967 | error = dmu_object_next(os, &obj, FALSE, | |
968 | prev_snap_txg)) | |
b663a23d | 969 | (void) dmu_free_long_object(os, obj); |
13fe0198 MA |
970 | /* sync out all frees */ |
971 | txg_wait_synced(dmu_objset_pool(os), 0); | |
b5256303 | 972 | dmu_objset_disown(os, B_FALSE, FTAG); |
13fe0198 MA |
973 | } |
974 | } | |
975 | ||
976 | return (dsl_sync_task(name, dsl_destroy_head_check, | |
3d45fdd6 | 977 | dsl_destroy_head_sync, &ddha, 0, ZFS_SPACE_CHECK_NONE)); |
13fe0198 MA |
978 | } |
979 | ||
980 | /* | |
981 | * Note, this function is used as the callback for dmu_objset_find(). We | |
982 | * always return 0 so that we will continue to find and process | |
983 | * inconsistent datasets, even if we encounter an error trying to | |
984 | * process one of them. | |
985 | */ | |
986 | /* ARGSUSED */ | |
987 | int | |
988 | dsl_destroy_inconsistent(const char *dsname, void *arg) | |
989 | { | |
990 | objset_t *os; | |
991 | ||
992 | if (dmu_objset_hold(dsname, FTAG, &os) == 0) { | |
47dfff3b MA |
993 | boolean_t need_destroy = DS_IS_INCONSISTENT(dmu_objset_ds(os)); |
994 | ||
995 | /* | |
996 | * If the dataset is inconsistent because a resumable receive | |
997 | * has failed, then do not destroy it. | |
998 | */ | |
999 | if (dsl_dataset_has_resume_receive_state(dmu_objset_ds(os))) | |
1000 | need_destroy = B_FALSE; | |
1001 | ||
13fe0198 | 1002 | dmu_objset_rele(os, FTAG); |
47dfff3b | 1003 | if (need_destroy) |
13fe0198 MA |
1004 | (void) dsl_destroy_head(dsname); |
1005 | } | |
1006 | return (0); | |
1007 | } | |
1008 | ||
1009 | ||
1010 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
1011 | EXPORT_SYMBOL(dsl_destroy_head); | |
1012 | EXPORT_SYMBOL(dsl_destroy_head_sync_impl); | |
1013 | EXPORT_SYMBOL(dsl_dataset_user_hold_check_one); | |
1014 | EXPORT_SYMBOL(dsl_destroy_snapshot_sync_impl); | |
1015 | EXPORT_SYMBOL(dsl_destroy_inconsistent); | |
1016 | EXPORT_SYMBOL(dsl_dataset_user_release_tmp); | |
1017 | EXPORT_SYMBOL(dsl_destroy_head_check_impl); | |
1018 | #endif |