Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 6502:66aef5f20377
6694731 drc->drc_real_ds->ds_phys->ds_flags & (1ULL<<0), file: ../../common/fs/zfs/dmu_send.c, line: 1069
author | timh |
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date | Mon, 28 Apr 2008 14:56:21 -0700 |
parents | 903545192033 |
children | 3a34b0dbb107 |
rev | line source |
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789 | 1 /* |
2 * CDDL HEADER START | |
3 * | |
4 * The contents of this file are subject to the terms of the | |
1544 | 5 * Common Development and Distribution License (the "License"). |
6 * You may not use this file except in compliance with the License. | |
789 | 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 /* | |
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22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
789 | 23 * Use is subject to license terms. |
24 */ | |
25 | |
26 #pragma ident "%Z%%M% %I% %E% SMI" | |
27 | |
28 #include <sys/dmu_objset.h> | |
29 #include <sys/dsl_dataset.h> | |
30 #include <sys/dsl_dir.h> | |
2082 | 31 #include <sys/dsl_prop.h> |
2199 | 32 #include <sys/dsl_synctask.h> |
789 | 33 #include <sys/dmu_traverse.h> |
34 #include <sys/dmu_tx.h> | |
35 #include <sys/arc.h> | |
36 #include <sys/zio.h> | |
37 #include <sys/zap.h> | |
38 #include <sys/unique.h> | |
39 #include <sys/zfs_context.h> | |
4007 | 40 #include <sys/zfs_ioctl.h> |
4543 | 41 #include <sys/spa.h> |
42 #include <sys/sunddi.h> | |
789 | 43 |
2199 | 44 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
45 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
46 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
47 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
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48 static dsl_syncfunc_t dsl_dataset_set_reservation_sync; |
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49 |
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50 #define DS_REF_MAX (1ULL << 62) |
789 | 51 |
52 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
53 | |
54 /* | |
55 * We use weighted reference counts to express the various forms of exclusion | |
56 * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open | |
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57 * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. |
789 | 58 * This makes the exclusion logic simple: the total refcnt for all opens cannot |
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59 * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their |
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60 * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume |
789 | 61 * just over half of the refcnt space, so there can't be more than one, but it |
62 * can peacefully coexist with any number of STANDARD opens. | |
63 */ | |
64 static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { | |
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65 0, /* DS_MODE_NONE - invalid */ |
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66 1, /* DS_MODE_STANDARD - unlimited number */ |
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67 (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ |
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68 DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ |
789 | 69 }; |
70 | |
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71 /* |
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72 * Figure out how much of this delta should be propogated to the dsl_dir |
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73 * layer. If there's a refreservation, that space has already been |
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74 * partially accounted for in our ancestors. |
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75 */ |
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76 static int64_t |
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77 parent_delta(dsl_dataset_t *ds, int64_t delta) |
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78 { |
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79 uint64_t old_bytes, new_bytes; |
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80 |
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81 if (ds->ds_reserved == 0) |
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82 return (delta); |
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83 |
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84 old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); |
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85 new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); |
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86 |
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87 ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); |
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88 return (new_bytes - old_bytes); |
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89 } |
789 | 90 |
91 void | |
92 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
93 { | |
2082 | 94 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
789 | 95 int compressed = BP_GET_PSIZE(bp); |
96 int uncompressed = BP_GET_UCSIZE(bp); | |
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97 int64_t delta; |
789 | 98 |
99 dprintf_bp(bp, "born, ds=%p\n", ds); | |
100 | |
101 ASSERT(dmu_tx_is_syncing(tx)); | |
102 /* It could have been compressed away to nothing */ | |
103 if (BP_IS_HOLE(bp)) | |
104 return; | |
105 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
106 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
107 if (ds == NULL) { | |
108 /* | |
109 * Account for the meta-objset space in its placeholder | |
110 * dsl_dir. | |
111 */ | |
112 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
113 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
114 used, compressed, uncompressed, tx); | |
115 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
116 return; | |
117 } | |
118 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
119 mutex_enter(&ds->ds_lock); | |
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120 delta = parent_delta(ds, used); |
789 | 121 ds->ds_phys->ds_used_bytes += used; |
122 ds->ds_phys->ds_compressed_bytes += compressed; | |
123 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
124 ds->ds_phys->ds_unique_bytes += used; | |
125 mutex_exit(&ds->ds_lock); | |
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126 dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); |
789 | 127 } |
128 | |
129 void | |
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130 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
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131 dmu_tx_t *tx) |
789 | 132 { |
2082 | 133 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
789 | 134 int compressed = BP_GET_PSIZE(bp); |
135 int uncompressed = BP_GET_UCSIZE(bp); | |
136 | |
137 ASSERT(dmu_tx_is_syncing(tx)); | |
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138 /* No block pointer => nothing to free */ |
789 | 139 if (BP_IS_HOLE(bp)) |
140 return; | |
141 | |
142 ASSERT(used > 0); | |
143 if (ds == NULL) { | |
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144 int err; |
789 | 145 /* |
146 * Account for the meta-objset space in its placeholder | |
147 * dataset. | |
148 */ | |
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149 err = arc_free(pio, tx->tx_pool->dp_spa, |
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150 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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151 ASSERT(err == 0); |
789 | 152 |
153 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
154 -used, -compressed, -uncompressed, tx); | |
155 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
156 return; | |
157 } | |
158 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
159 | |
160 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
161 | |
162 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
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163 int err; |
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164 int64_t delta; |
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165 |
789 | 166 dprintf_bp(bp, "freeing: %s", ""); |
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167 err = arc_free(pio, tx->tx_pool->dp_spa, |
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168 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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169 ASSERT(err == 0); |
789 | 170 |
171 mutex_enter(&ds->ds_lock); | |
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172 ASSERT(ds->ds_phys->ds_unique_bytes >= used || |
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173 !DS_UNIQUE_IS_ACCURATE(ds)); |
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174 delta = parent_delta(ds, -used); |
789 | 175 ds->ds_phys->ds_unique_bytes -= used; |
176 mutex_exit(&ds->ds_lock); | |
177 dsl_dir_diduse_space(ds->ds_dir, | |
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178 delta, -compressed, -uncompressed, tx); |
789 | 179 } else { |
180 dprintf_bp(bp, "putting on dead list: %s", ""); | |
1544 | 181 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
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182 ASSERT3U(ds->ds_prev->ds_object, ==, |
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183 ds->ds_phys->ds_prev_snap_obj); |
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184 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); |
789 | 185 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
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186 if (ds->ds_prev->ds_phys->ds_next_snap_obj == |
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187 ds->ds_object && bp->blk_birth > |
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188 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
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189 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
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190 mutex_enter(&ds->ds_prev->ds_lock); |
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191 ds->ds_prev->ds_phys->ds_unique_bytes += used; |
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192 mutex_exit(&ds->ds_prev->ds_lock); |
789 | 193 } |
194 } | |
195 mutex_enter(&ds->ds_lock); | |
196 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
197 ds->ds_phys->ds_used_bytes -= used; | |
198 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
199 ds->ds_phys->ds_compressed_bytes -= compressed; | |
200 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
201 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
202 mutex_exit(&ds->ds_lock); | |
203 } | |
204 | |
1544 | 205 uint64_t |
206 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
789 | 207 { |
2885 | 208 uint64_t trysnap = 0; |
209 | |
789 | 210 if (ds == NULL) |
1544 | 211 return (0); |
789 | 212 /* |
213 * The snapshot creation could fail, but that would cause an | |
214 * incorrect FALSE return, which would only result in an | |
215 * overestimation of the amount of space that an operation would | |
216 * consume, which is OK. | |
217 * | |
218 * There's also a small window where we could miss a pending | |
219 * snapshot, because we could set the sync task in the quiescing | |
220 * phase. So this should only be used as a guess. | |
221 */ | |
2885 | 222 if (ds->ds_trysnap_txg > |
223 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
224 trysnap = ds->ds_trysnap_txg; | |
225 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
1544 | 226 } |
227 | |
228 int | |
229 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
230 { | |
231 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
789 | 232 } |
233 | |
234 /* ARGSUSED */ | |
235 static void | |
236 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
237 { | |
238 dsl_dataset_t *ds = dsv; | |
239 | |
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240 /* open_refcount == DS_REF_MAX when deleting */ |
789 | 241 ASSERT(ds->ds_open_refcount == 0 || |
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242 ds->ds_open_refcount == DS_REF_MAX); |
789 | 243 |
244 dprintf_ds(ds, "evicting %s\n", ""); | |
245 | |
4787 | 246 unique_remove(ds->ds_fsid_guid); |
789 | 247 |
248 if (ds->ds_user_ptr != NULL) | |
249 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
250 | |
251 if (ds->ds_prev) { | |
252 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
253 ds->ds_prev = NULL; | |
254 } | |
255 | |
256 bplist_close(&ds->ds_deadlist); | |
257 dsl_dir_close(ds->ds_dir, ds); | |
258 | |
4787 | 259 ASSERT(!list_link_active(&ds->ds_synced_link)); |
789 | 260 |
2856 | 261 mutex_destroy(&ds->ds_lock); |
4787 | 262 mutex_destroy(&ds->ds_opening_lock); |
2856 | 263 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
264 | |
789 | 265 kmem_free(ds, sizeof (dsl_dataset_t)); |
266 } | |
267 | |
1544 | 268 static int |
789 | 269 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
270 { | |
271 dsl_dataset_phys_t *headphys; | |
272 int err; | |
273 dmu_buf_t *headdbuf; | |
274 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
275 objset_t *mos = dp->dp_meta_objset; | |
276 | |
277 if (ds->ds_snapname[0]) | |
1544 | 278 return (0); |
789 | 279 if (ds->ds_phys->ds_next_snap_obj == 0) |
1544 | 280 return (0); |
789 | 281 |
1544 | 282 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
283 FTAG, &headdbuf); | |
284 if (err) | |
285 return (err); | |
789 | 286 headphys = headdbuf->db_data; |
287 err = zap_value_search(dp->dp_meta_objset, | |
4577 | 288 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
1544 | 289 dmu_buf_rele(headdbuf, FTAG); |
290 return (err); | |
789 | 291 } |
292 | |
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293 static int |
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294 dsl_dataset_snap_lookup(objset_t *os, uint64_t flags, |
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295 uint64_t snapnames_zapobj, const char *name, uint64_t *value) |
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296 { |
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297 matchtype_t mt; |
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298 int err; |
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299 |
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300 if (flags & DS_FLAG_CI_DATASET) |
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301 mt = MT_FIRST; |
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302 else |
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303 mt = MT_EXACT; |
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304 |
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305 err = zap_lookup_norm(os, snapnames_zapobj, name, 8, 1, |
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306 value, mt, NULL, 0, NULL); |
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307 if (err == ENOTSUP && mt == MT_FIRST) |
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308 err = zap_lookup(os, snapnames_zapobj, name, 8, 1, value); |
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309 return (err); |
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310 } |
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311 |
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312 static int |
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313 dsl_dataset_snap_remove(objset_t *os, uint64_t flags, |
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314 uint64_t snapnames_zapobj, char *name, dmu_tx_t *tx) |
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315 { |
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316 matchtype_t mt; |
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317 int err; |
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318 |
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319 if (flags & DS_FLAG_CI_DATASET) |
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320 mt = MT_FIRST; |
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321 else |
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322 mt = MT_EXACT; |
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323 |
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324 err = zap_remove_norm(os, snapnames_zapobj, name, mt, tx); |
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325 if (err == ENOTSUP && mt == MT_FIRST) |
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326 err = zap_remove(os, snapnames_zapobj, name, tx); |
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327 return (err); |
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328 } |
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329 |
1544 | 330 int |
789 | 331 dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, |
1544 | 332 int mode, void *tag, dsl_dataset_t **dsp) |
789 | 333 { |
334 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
335 objset_t *mos = dp->dp_meta_objset; | |
336 dmu_buf_t *dbuf; | |
337 dsl_dataset_t *ds; | |
1544 | 338 int err; |
789 | 339 |
340 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
341 dsl_pool_sync_context(dp)); | |
342 | |
1544 | 343 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
344 if (err) | |
345 return (err); | |
789 | 346 ds = dmu_buf_get_user(dbuf); |
347 if (ds == NULL) { | |
348 dsl_dataset_t *winner; | |
349 | |
350 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
351 ds->ds_dbuf = dbuf; | |
352 ds->ds_object = dsobj; | |
353 ds->ds_phys = dbuf->db_data; | |
354 | |
2856 | 355 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
4787 | 356 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
2856 | 357 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
358 NULL); | |
359 | |
1544 | 360 err = bplist_open(&ds->ds_deadlist, |
789 | 361 mos, ds->ds_phys->ds_deadlist_obj); |
1544 | 362 if (err == 0) { |
363 err = dsl_dir_open_obj(dp, | |
364 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
365 } | |
366 if (err) { | |
367 /* | |
368 * we don't really need to close the blist if we | |
369 * just opened it. | |
370 */ | |
2856 | 371 mutex_destroy(&ds->ds_lock); |
4787 | 372 mutex_destroy(&ds->ds_opening_lock); |
2856 | 373 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
1544 | 374 kmem_free(ds, sizeof (dsl_dataset_t)); |
375 dmu_buf_rele(dbuf, tag); | |
376 return (err); | |
377 } | |
789 | 378 |
379 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
380 ds->ds_snapname[0] = '\0'; | |
381 if (ds->ds_phys->ds_prev_snap_obj) { | |
1544 | 382 err = dsl_dataset_open_obj(dp, |
789 | 383 ds->ds_phys->ds_prev_snap_obj, NULL, |
1544 | 384 DS_MODE_NONE, ds, &ds->ds_prev); |
789 | 385 } |
386 } else { | |
387 if (snapname) { | |
388 #ifdef ZFS_DEBUG | |
389 dsl_dataset_phys_t *headphys; | |
1544 | 390 dmu_buf_t *headdbuf; |
391 err = dmu_bonus_hold(mos, | |
392 ds->ds_dir->dd_phys->dd_head_dataset_obj, | |
393 FTAG, &headdbuf); | |
394 if (err == 0) { | |
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395 uint64_t foundobj; |
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396 |
1544 | 397 headphys = headdbuf->db_data; |
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398 err = dsl_dataset_snap_lookup( |
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399 dp->dp_meta_objset, |
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400 headphys->ds_flags, |
1544 | 401 headphys->ds_snapnames_zapobj, |
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402 snapname, &foundobj); |
1544 | 403 ASSERT3U(foundobj, ==, dsobj); |
404 dmu_buf_rele(headdbuf, FTAG); | |
405 } | |
789 | 406 #endif |
407 (void) strcat(ds->ds_snapname, snapname); | |
408 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { | |
1544 | 409 err = dsl_dataset_get_snapname(ds); |
789 | 410 } |
411 } | |
412 | |
5475
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413 if (!dsl_dataset_is_snapshot(ds)) { |
5569
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414 /* |
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415 * In sync context, we're called with either no lock |
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416 * or with the write lock. If we're not syncing, |
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417 * we're always called with the read lock held. |
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418 */ |
5475
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419 boolean_t need_lock = |
5569
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420 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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421 dsl_pool_sync_context(dp); |
5475
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422 |
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423 if (need_lock) |
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424 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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425 |
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426 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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427 "refreservation", sizeof (uint64_t), 1, |
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428 &ds->ds_reserved, NULL); |
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429 if (err == 0) { |
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430 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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431 "refquota", sizeof (uint64_t), 1, |
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432 &ds->ds_quota, NULL); |
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433 } |
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434 |
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435 if (need_lock) |
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436 rw_exit(&dp->dp_config_rwlock); |
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437 } else { |
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438 ds->ds_reserved = ds->ds_quota = 0; |
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439 } |
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440 |
1544 | 441 if (err == 0) { |
442 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
443 dsl_dataset_evict); | |
444 } | |
445 if (err || winner) { | |
789 | 446 bplist_close(&ds->ds_deadlist); |
447 if (ds->ds_prev) { | |
448 dsl_dataset_close(ds->ds_prev, | |
449 DS_MODE_NONE, ds); | |
450 } | |
451 dsl_dir_close(ds->ds_dir, ds); | |
2856 | 452 mutex_destroy(&ds->ds_lock); |
4787 | 453 mutex_destroy(&ds->ds_opening_lock); |
2856 | 454 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
789 | 455 kmem_free(ds, sizeof (dsl_dataset_t)); |
1544 | 456 if (err) { |
457 dmu_buf_rele(dbuf, tag); | |
458 return (err); | |
459 } | |
789 | 460 ds = winner; |
461 } else { | |
4787 | 462 ds->ds_fsid_guid = |
789 | 463 unique_insert(ds->ds_phys->ds_fsid_guid); |
464 } | |
465 } | |
466 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
467 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
468 | |
469 mutex_enter(&ds->ds_lock); | |
470 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
2082 | 471 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
472 !DS_MODE_IS_INCONSISTENT(mode)) || | |
3444
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473 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
789 | 474 mutex_exit(&ds->ds_lock); |
475 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
1544 | 476 return (EBUSY); |
789 | 477 } |
478 ds->ds_open_refcount += weight; | |
479 mutex_exit(&ds->ds_lock); | |
480 | |
1544 | 481 *dsp = ds; |
482 return (0); | |
789 | 483 } |
484 | |
485 int | |
486 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
487 void *tag, dsl_dataset_t **dsp) | |
488 { | |
489 dsl_dir_t *dd; | |
490 dsl_pool_t *dp; | |
491 const char *tail; | |
492 uint64_t obj; | |
493 dsl_dataset_t *ds = NULL; | |
494 int err = 0; | |
495 | |
1544 | 496 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
497 if (err) | |
498 return (err); | |
789 | 499 |
500 dp = dd->dd_pool; | |
501 obj = dd->dd_phys->dd_head_dataset_obj; | |
502 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
503 if (obj == 0) { | |
504 /* A dataset with no associated objset */ | |
505 err = ENOENT; | |
506 goto out; | |
507 } | |
508 | |
509 if (tail != NULL) { | |
510 objset_t *mos = dp->dp_meta_objset; | |
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511 uint64_t flags; |
789 | 512 |
1544 | 513 err = dsl_dataset_open_obj(dp, obj, NULL, |
514 DS_MODE_NONE, tag, &ds); | |
515 if (err) | |
516 goto out; | |
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517 flags = ds->ds_phys->ds_flags; |
789 | 518 obj = ds->ds_phys->ds_snapnames_zapobj; |
519 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
520 ds = NULL; | |
521 | |
522 if (tail[0] != '@') { | |
523 err = ENOENT; | |
524 goto out; | |
525 } | |
526 tail++; | |
527 | |
528 /* Look for a snapshot */ | |
529 if (!DS_MODE_IS_READONLY(mode)) { | |
530 err = EROFS; | |
531 goto out; | |
532 } | |
533 dprintf("looking for snapshot '%s'\n", tail); | |
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534 err = dsl_dataset_snap_lookup(mos, flags, obj, tail, &obj); |
789 | 535 if (err) |
536 goto out; | |
537 } | |
1544 | 538 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
789 | 539 |
540 out: | |
541 rw_exit(&dp->dp_config_rwlock); | |
542 dsl_dir_close(dd, FTAG); | |
543 | |
544 ASSERT3U((err == 0), ==, (ds != NULL)); | |
545 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
546 | |
547 *dsp = ds; | |
548 return (err); | |
549 } | |
550 | |
551 int | |
552 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
553 { | |
554 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
555 } | |
556 | |
557 void | |
558 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
559 { | |
560 if (ds == NULL) { | |
561 (void) strcpy(name, "mos"); | |
562 } else { | |
563 dsl_dir_name(ds->ds_dir, name); | |
1544 | 564 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
789 | 565 if (ds->ds_snapname[0]) { |
566 (void) strcat(name, "@"); | |
567 if (!MUTEX_HELD(&ds->ds_lock)) { | |
568 /* | |
569 * We use a "recursive" mutex so that we | |
570 * can call dprintf_ds() with ds_lock held. | |
571 */ | |
572 mutex_enter(&ds->ds_lock); | |
573 (void) strcat(name, ds->ds_snapname); | |
574 mutex_exit(&ds->ds_lock); | |
575 } else { | |
576 (void) strcat(name, ds->ds_snapname); | |
577 } | |
578 } | |
579 } | |
580 } | |
581 | |
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582 static int |
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583 dsl_dataset_namelen(dsl_dataset_t *ds) |
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584 { |
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585 int result; |
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586 |
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587 if (ds == NULL) { |
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588 result = 3; /* "mos" */ |
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589 } else { |
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590 result = dsl_dir_namelen(ds->ds_dir); |
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591 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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592 if (ds->ds_snapname[0]) { |
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593 ++result; /* adding one for the @-sign */ |
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594 if (!MUTEX_HELD(&ds->ds_lock)) { |
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595 /* see dsl_datset_name */ |
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596 mutex_enter(&ds->ds_lock); |
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597 result += strlen(ds->ds_snapname); |
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598 mutex_exit(&ds->ds_lock); |
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599 } else { |
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600 result += strlen(ds->ds_snapname); |
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601 } |
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602 } |
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603 } |
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604 |
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605 return (result); |
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606 } |
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607 |
789 | 608 void |
609 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
610 { | |
611 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
612 mutex_enter(&ds->ds_lock); | |
613 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
614 ds->ds_open_refcount -= weight; | |
615 mutex_exit(&ds->ds_lock); | |
616 | |
1544 | 617 dmu_buf_rele(ds->ds_dbuf, tag); |
789 | 618 } |
619 | |
620 void | |
5367 | 621 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
622 { | |
623 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
624 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
625 mutex_enter(&ds->ds_lock); | |
626 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
627 ASSERT3U(oldweight, >=, newweight); | |
628 ds->ds_open_refcount -= oldweight; | |
629 ds->ds_open_refcount += newweight; | |
630 mutex_exit(&ds->ds_lock); | |
631 } | |
632 | |
633 boolean_t | |
634 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
635 { | |
636 boolean_t rv; | |
637 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
638 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
639 mutex_enter(&ds->ds_lock); | |
640 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
641 ASSERT3U(newweight, >=, oldweight); | |
642 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
643 rv = B_FALSE; | |
644 } else { | |
645 ds->ds_open_refcount -= oldweight; | |
646 ds->ds_open_refcount += newweight; | |
647 rv = B_TRUE; | |
648 } | |
649 mutex_exit(&ds->ds_lock); | |
650 return (rv); | |
651 } | |
652 | |
653 void | |
789 | 654 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
655 { | |
656 objset_t *mos = dp->dp_meta_objset; | |
657 dmu_buf_t *dbuf; | |
658 dsl_dataset_phys_t *dsphys; | |
659 dsl_dataset_t *ds; | |
660 uint64_t dsobj; | |
661 dsl_dir_t *dd; | |
662 | |
663 dsl_dir_create_root(mos, ddobjp, tx); | |
1544 | 664 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
789 | 665 |
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666 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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667 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
1544 | 668 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
789 | 669 dmu_buf_will_dirty(dbuf, tx); |
670 dsphys = dbuf->db_data; | |
671 dsphys->ds_dir_obj = dd->dd_object; | |
672 dsphys->ds_fsid_guid = unique_create(); | |
673 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
674 sizeof (dsphys->ds_guid)); | |
675 dsphys->ds_snapnames_zapobj = | |
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676 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
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677 DMU_OT_NONE, 0, tx); |
789 | 678 dsphys->ds_creation_time = gethrestime_sec(); |
679 dsphys->ds_creation_txg = tx->tx_txg; | |
680 dsphys->ds_deadlist_obj = | |
681 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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682 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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683 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
1544 | 684 dmu_buf_rele(dbuf, FTAG); |
789 | 685 |
686 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
687 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
688 dsl_dir_close(dd, FTAG); | |
689 | |
1544 | 690 VERIFY(0 == |
691 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
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692 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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693 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
789 | 694 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
695 } | |
696 | |
2199 | 697 uint64_t |
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698 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, |
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699 uint64_t flags, dmu_tx_t *tx) |
789 | 700 { |
5367 | 701 dsl_pool_t *dp = dd->dd_pool; |
789 | 702 dmu_buf_t *dbuf; |
703 dsl_dataset_phys_t *dsphys; | |
5367 | 704 uint64_t dsobj; |
789 | 705 objset_t *mos = dp->dp_meta_objset; |
706 | |
5367 | 707 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
708 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
789 | 709 ASSERT(dmu_tx_is_syncing(tx)); |
5367 | 710 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
789 | 711 |
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712 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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713 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
1544 | 714 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
789 | 715 dmu_buf_will_dirty(dbuf, tx); |
716 dsphys = dbuf->db_data; | |
717 dsphys->ds_dir_obj = dd->dd_object; | |
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718 dsphys->ds_flags = flags; |
789 | 719 dsphys->ds_fsid_guid = unique_create(); |
720 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
721 sizeof (dsphys->ds_guid)); | |
722 dsphys->ds_snapnames_zapobj = | |
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723 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
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724 DMU_OT_NONE, 0, tx); |
789 | 725 dsphys->ds_creation_time = gethrestime_sec(); |
726 dsphys->ds_creation_txg = tx->tx_txg; | |
727 dsphys->ds_deadlist_obj = | |
728 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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729 |
5367 | 730 if (origin) { |
731 dsphys->ds_prev_snap_obj = origin->ds_object; | |
789 | 732 dsphys->ds_prev_snap_txg = |
5367 | 733 origin->ds_phys->ds_creation_txg; |
789 | 734 dsphys->ds_used_bytes = |
5367 | 735 origin->ds_phys->ds_used_bytes; |
789 | 736 dsphys->ds_compressed_bytes = |
5367 | 737 origin->ds_phys->ds_compressed_bytes; |
789 | 738 dsphys->ds_uncompressed_bytes = |
5367 | 739 origin->ds_phys->ds_uncompressed_bytes; |
740 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
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741 dsphys->ds_flags |= origin->ds_phys->ds_flags; |
789 | 742 |
5367 | 743 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
744 origin->ds_phys->ds_num_children++; | |
789 | 745 |
746 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
5367 | 747 dd->dd_phys->dd_origin_obj = origin->ds_object; |
789 | 748 } |
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749 |
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750 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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751 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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752 |
1544 | 753 dmu_buf_rele(dbuf, FTAG); |
789 | 754 |
755 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
756 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
5367 | 757 |
758 return (dsobj); | |
759 } | |
760 | |
761 uint64_t | |
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762 dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, |
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763 dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) |
5367 | 764 { |
765 dsl_pool_t *dp = pdd->dd_pool; | |
766 uint64_t dsobj, ddobj; | |
767 dsl_dir_t *dd; | |
768 | |
769 ASSERT(lastname[0] != '@'); | |
770 | |
771 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
772 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
773 | |
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774 dsobj = dsl_dataset_create_sync_impl(dd, origin, flags, tx); |
5367 | 775 |
776 dsl_deleg_set_create_perms(dd, tx, cr); | |
777 | |
789 | 778 dsl_dir_close(dd, FTAG); |
779 | |
2199 | 780 return (dsobj); |
781 } | |
782 | |
783 struct destroyarg { | |
784 dsl_sync_task_group_t *dstg; | |
785 char *snapname; | |
786 char *failed; | |
787 }; | |
788 | |
789 static int | |
790 dsl_snapshot_destroy_one(char *name, void *arg) | |
791 { | |
792 struct destroyarg *da = arg; | |
793 dsl_dataset_t *ds; | |
794 char *cp; | |
795 int err; | |
796 | |
797 (void) strcat(name, "@"); | |
798 (void) strcat(name, da->snapname); | |
799 err = dsl_dataset_open(name, | |
800 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
4007 | 801 da->dstg, &ds); |
2199 | 802 cp = strchr(name, '@'); |
803 *cp = '\0'; | |
804 if (err == ENOENT) | |
805 return (0); | |
806 if (err) { | |
807 (void) strcpy(da->failed, name); | |
808 return (err); | |
809 } | |
810 | |
811 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
4007 | 812 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
789 | 813 return (0); |
814 } | |
815 | |
2199 | 816 /* |
817 * Destroy 'snapname' in all descendants of 'fsname'. | |
818 */ | |
819 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
820 int | |
821 dsl_snapshots_destroy(char *fsname, char *snapname) | |
822 { | |
823 int err; | |
824 struct destroyarg da; | |
825 dsl_sync_task_t *dst; | |
826 spa_t *spa; | |
827 | |
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828 err = spa_open(fsname, &spa, FTAG); |
2199 | 829 if (err) |
830 return (err); | |
831 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
832 da.snapname = snapname; | |
833 da.failed = fsname; | |
834 | |
835 err = dmu_objset_find(fsname, | |
2417 | 836 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
2199 | 837 |
838 if (err == 0) | |
839 err = dsl_sync_task_group_wait(da.dstg); | |
840 | |
841 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
842 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
843 dsl_dataset_t *ds = dst->dst_arg1; | |
844 if (dst->dst_err) { | |
845 dsl_dataset_name(ds, fsname); | |
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846 *strchr(fsname, '@') = '\0'; |
2199 | 847 } |
848 /* | |
849 * If it was successful, destroy_sync would have | |
850 * closed the ds | |
851 */ | |
852 if (err) | |
4007 | 853 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
2199 | 854 } |
855 | |
856 dsl_sync_task_group_destroy(da.dstg); | |
857 spa_close(spa, FTAG); | |
858 return (err); | |
859 } | |
860 | |
5367 | 861 /* |
862 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
863 * successful or not), ds will be closed and caller can no longer | |
864 * dereference it. | |
865 */ | |
789 | 866 int |
5367 | 867 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
789 | 868 { |
869 int err; | |
2199 | 870 dsl_sync_task_group_t *dstg; |
871 objset_t *os; | |
789 | 872 dsl_dir_t *dd; |
2199 | 873 uint64_t obj; |
874 | |
5367 | 875 if (ds->ds_open_refcount != DS_REF_MAX) { |
876 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
877 DS_MODE_EXCLUSIVE) == 0) { | |
878 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
879 return (EBUSY); | |
880 } | |
881 } | |
882 | |
883 if (dsl_dataset_is_snapshot(ds)) { | |
2199 | 884 /* Destroying a snapshot is simpler */ |
885 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
886 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
5367 | 887 ds, tag, 0); |
888 goto out; | |
2199 | 889 } |
890 | |
891 dd = ds->ds_dir; | |
789 | 892 |
2199 | 893 /* |
894 * Check for errors and mark this ds as inconsistent, in | |
895 * case we crash while freeing the objects. | |
896 */ | |
897 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
898 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
5367 | 899 if (err) |
900 goto out; | |
901 | |
902 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
903 if (err) | |
904 goto out; | |
2199 | 905 |
906 /* | |
907 * remove the objects in open context, so that we won't | |
908 * have too much to do in syncing context. | |
909 */ | |
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910 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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911 ds->ds_phys->ds_prev_snap_txg)) { |
2199 | 912 dmu_tx_t *tx = dmu_tx_create(os); |
913 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
914 dmu_tx_hold_bonus(tx, obj); | |
915 err = dmu_tx_assign(tx, TXG_WAIT); | |
916 if (err) { | |
917 /* | |
918 * Perhaps there is not enough disk | |
919 * space. Just deal with it from | |
920 * dsl_dataset_destroy_sync(). | |
921 */ | |
922 dmu_tx_abort(tx); | |
923 continue; | |
924 } | |
925 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
926 dmu_tx_commit(tx); | |
927 } | |
928 /* Make sure it's not dirty before we finish destroying it. */ | |
929 txg_wait_synced(dd->dd_pool, 0); | |
930 | |
931 dmu_objset_close(os); | |
932 if (err != ESRCH) | |
5367 | 933 goto out; |
2199 | 934 |
5367 | 935 if (ds->ds_user_ptr) { |
936 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
937 ds->ds_user_ptr = NULL; | |
938 } | |
939 | |
940 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
941 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
942 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
943 | |
1544 | 944 if (err) |
5367 | 945 goto out; |
789 | 946 |
2199 | 947 /* |
948 * Blow away the dsl_dir + head dataset. | |
949 */ | |
950 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
951 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
5367 | 952 dsl_dataset_destroy_sync, ds, tag, 0); |
2199 | 953 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
954 dsl_dir_destroy_sync, dd, FTAG, 0); | |
955 err = dsl_sync_task_group_wait(dstg); | |
956 dsl_sync_task_group_destroy(dstg); | |
957 /* if it is successful, *destroy_sync will close the ds+dd */ | |
5367 | 958 if (err) |
2199 | 959 dsl_dir_close(dd, FTAG); |
5367 | 960 out: |
961 if (err) | |
962 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
789 | 963 return (err); |
964 } | |
965 | |
966 int | |
5367 | 967 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
789 | 968 { |
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969 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
5367 | 970 |
2199 | 971 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
972 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
5367 | 973 ds, &ost, 0)); |
789 | 974 } |
975 | |
976 void * | |
977 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
978 void *p, dsl_dataset_evict_func_t func) | |
979 { | |
980 void *old; | |
981 | |
982 mutex_enter(&ds->ds_lock); | |
983 old = ds->ds_user_ptr; | |
984 if (old == NULL) { | |
985 ds->ds_user_ptr = p; | |
986 ds->ds_user_evict_func = func; | |
987 } | |
988 mutex_exit(&ds->ds_lock); | |
989 return (old); | |
990 } | |
991 | |
992 void * | |
993 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
994 { | |
995 return (ds->ds_user_ptr); | |
996 } | |
997 | |
998 | |
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999 blkptr_t * |
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1000 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
789 | 1001 { |
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1002 return (&ds->ds_phys->ds_bp); |
789 | 1003 } |
1004 | |
1005 void | |
1006 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
1007 { | |
1008 ASSERT(dmu_tx_is_syncing(tx)); | |
1009 /* If it's the meta-objset, set dp_meta_rootbp */ | |
1010 if (ds == NULL) { | |
1011 tx->tx_pool->dp_meta_rootbp = *bp; | |
1012 } else { | |
1013 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1014 ds->ds_phys->ds_bp = *bp; | |
1015 } | |
1016 } | |
1017 | |
1018 spa_t * | |
1019 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
1020 { | |
1021 return (ds->ds_dir->dd_pool->dp_spa); | |
1022 } | |
1023 | |
1024 void | |
1025 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
1026 { | |
1027 dsl_pool_t *dp; | |
1028 | |
1029 if (ds == NULL) /* this is the meta-objset */ | |
1030 return; | |
1031 | |
1032 ASSERT(ds->ds_user_ptr != NULL); | |
2885 | 1033 |
1034 if (ds->ds_phys->ds_next_snap_obj != 0) | |
1035 panic("dirtying snapshot!"); | |
789 | 1036 |
1037 dp = ds->ds_dir->dd_pool; | |
1038 | |
1039 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
1040 /* up the hold count until we can be written out */ | |
1041 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
1042 } | |
1043 } | |
1044 | |
5378
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1045 /* |
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1046 * The unique space in the head dataset can be calculated by subtracting |
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1047 * the space used in the most recent snapshot, that is still being used |
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1048 * in this file system, from the space currently in use. To figure out |
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1049 * the space in the most recent snapshot still in use, we need to take |
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1050 * the total space used in the snapshot and subtract out the space that |
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1051 * has been freed up since the snapshot was taken. |
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1052 */ |
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1053 static void |
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1054 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1055 { |
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1056 uint64_t mrs_used; |
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1057 uint64_t dlused, dlcomp, dluncomp; |
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1058 |
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1059 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1060 |
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1061 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1062 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1063 else |
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1064 mrs_used = 0; |
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1065 |
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1066 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1067 &dluncomp)); |
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1068 |
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1069 ASSERT3U(dlused, <=, mrs_used); |
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1070 ds->ds_phys->ds_unique_bytes = |
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1071 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1072 |
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1073 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1074 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1075 SPA_VERSION_UNIQUE_ACCURATE) |
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1076 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1077 } |
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1078 |
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1079 static uint64_t |
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1080 dsl_dataset_unique(dsl_dataset_t *ds) |
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1081 { |
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1082 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1083 dsl_dataset_recalc_head_uniq(ds); |
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1084 |
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1085 return (ds->ds_phys->ds_unique_bytes); |
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1086 } |
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1087 |
789 | 1088 struct killarg { |
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1089 int64_t *usedp; |
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1090 int64_t *compressedp; |
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1091 int64_t *uncompressedp; |
789 | 1092 zio_t *zio; |
1093 dmu_tx_t *tx; | |
1094 }; | |
1095 | |
1096 static int | |
1097 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
1098 { | |
1099 struct killarg *ka = arg; | |
1100 blkptr_t *bp = &bc->bc_blkptr; | |
1101 | |
1102 ASSERT3U(bc->bc_errno, ==, 0); | |
1103 | |
1104 /* | |
1105 * Since this callback is not called concurrently, no lock is | |
1106 * needed on the accounting values. | |
1107 */ | |
2082 | 1108 *ka->usedp += bp_get_dasize(spa, bp); |
789 | 1109 *ka->compressedp += BP_GET_PSIZE(bp); |
1110 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
1111 /* XXX check for EIO? */ | |
1112 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
1113 ARC_NOWAIT); | |
1114 return (0); | |
1115 } | |
1116 | |
1117 /* ARGSUSED */ | |
2199 | 1118 static int |
1119 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
789 | 1120 { |
2199 | 1121 dsl_dataset_t *ds = arg1; |
5367 | 1122 dmu_objset_type_t *ost = arg2; |
789 | 1123 |
2199 | 1124 /* |
5367 | 1125 * We can only roll back to emptyness if it is a ZPL objset. |
2199 | 1126 */ |
5367 | 1127 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
789 | 1128 return (EINVAL); |
1129 | |
2199 | 1130 /* |
1131 * This must not be a snapshot. | |
1132 */ | |
1133 if (ds->ds_phys->ds_next_snap_obj != 0) | |
1134 return (EINVAL); | |
789 | 1135 |
1136 /* | |
1137 * If we made changes this txg, traverse_dsl_dataset won't find | |
1138 * them. Try again. | |
1139 */ | |
2199 | 1140 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
789 | 1141 return (EAGAIN); |
2199 | 1142 |
1143 return (0); | |
1144 } | |
789 | 1145 |
2199 | 1146 /* ARGSUSED */ |
1147 static void | |
4543 | 1148 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
2199 | 1149 { |
1150 dsl_dataset_t *ds = arg1; | |
5367 | 1151 dmu_objset_type_t *ost = arg2; |
2199 | 1152 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
789 | 1153 |
1154 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1155 | |
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1156 /* |
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1157 * Before the roll back destroy the zil. |
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1158 */ |
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1159 if (ds->ds_user_ptr != NULL) { |
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1160 zil_rollback_destroy( |
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1161 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
5367 | 1162 |
1163 /* | |
1164 * We need to make sure that the objset_impl_t is reopened after | |
1165 * we do the rollback, otherwise it will have the wrong | |
1166 * objset_phys_t. Normally this would happen when this | |
1167 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
1168 * dataset to be immediately evicted. But when doing "zfs recv | |
1169 * -F", we reopen the objset before that, so that there is no | |
1170 * window where the dataset is closed and inconsistent. | |
1171 */ | |
1172 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
1173 ds->ds_user_ptr = NULL; | |
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1174 } |
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1175 |
789 | 1176 /* Zero out the deadlist. */ |
1177 bplist_close(&ds->ds_deadlist); | |
1178 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
1179 ds->ds_phys->ds_deadlist_obj = | |
1180 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
1544 | 1181 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
1182 ds->ds_phys->ds_deadlist_obj)); | |
789 | 1183 |
1184 { | |
1185 /* Free blkptrs that we gave birth to */ | |
1186 zio_t *zio; | |
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1187 int64_t used = 0, compressed = 0, uncompressed = 0; |
789 | 1188 struct killarg ka; |
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1189 int64_t delta; |
789 | 1190 |
1191 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
1192 ZIO_FLAG_MUSTSUCCEED); | |
1193 ka.usedp = &used; | |
1194 ka.compressedp = &compressed; | |
1195 ka.uncompressedp = &uncompressed; | |
1196 ka.zio = zio; | |
1197 ka.tx = tx; | |
1198 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
1199 ADVANCE_POST, kill_blkptr, &ka); | |
1200 (void) zio_wait(zio); | |
1201 | |
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1202 /* only deduct space beyond any refreservation */ |
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1203 delta = parent_delta(ds, -used); |
2199 | 1204 dsl_dir_diduse_space(ds->ds_dir, |
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1205 delta, -compressed, -uncompressed, tx); |
789 | 1206 } |
1207 | |
5367 | 1208 if (ds->ds_prev) { |
1209 /* Change our contents to that of the prev snapshot */ | |
1210 ASSERT3U(ds->ds_prev->ds_object, ==, | |
1211 ds->ds_phys->ds_prev_snap_obj); | |
1212 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
1213 ds->ds_phys->ds_used_bytes = | |
1214 ds->ds_prev->ds_phys->ds_used_bytes; | |
1215 ds->ds_phys->ds_compressed_bytes = | |
1216 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
1217 ds->ds_phys->ds_uncompressed_bytes = | |
1218 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
1219 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
1220 ds->ds_phys->ds_unique_bytes = 0; | |
789 | 1221 |
5367 | 1222 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
1223 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
1224 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
1225 } | |
1226 } else { | |
1227 /* Zero out our contents, recreate objset */ | |
1228 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
1229 ds->ds_phys->ds_used_bytes = 0; | |
1230 ds->ds_phys->ds_compressed_bytes = 0; | |
1231 ds->ds_phys->ds_uncompressed_bytes = 0; | |
1232 ds->ds_phys->ds_flags = 0; | |
1233 ds->ds_phys->ds_unique_bytes = 0; | |
1234 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
1235 &ds->ds_phys->ds_bp, *ost, tx); | |
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1236 } |
4543 | 1237 |
1238 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
1239 tx, cr, "dataset = %llu", ds->ds_object); | |
789 | 1240 } |
1241 | |
1731
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1242 /* ARGSUSED */ |
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1243 static int |
2199 | 1244 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
1731
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1245 { |
2199 | 1246 dsl_dataset_t *ds = arg1; |
5367 | 1247 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
1248 uint64_t count; | |
1249 int err; | |
1731
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1250 |
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1251 /* |
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1252 * Can't delete a head dataset if there are snapshots of it. |
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1253 * (Except if the only snapshots are from the branch we cloned |
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1254 * from.) |
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1255 */ |
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1256 if (ds->ds_prev != NULL && |
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1257 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
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1258 return (EINVAL); |
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1259 |
5367 | 1260 /* |
1261 * This is really a dsl_dir thing, but check it here so that | |
1262 * we'll be less likely to leave this dataset inconsistent & | |
1263 * nearly destroyed. | |
1264 */ | |
1265 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
1266 if (err) | |
1267 return (err); | |
1268 if (count != 0) | |
1269 return (EEXIST); | |
1270 | |
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1271 return (0); |
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1272 } |
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1273 |
2199 | 1274 /* ARGSUSED */ |
1275 static void | |
4543 | 1276 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
789 | 1277 { |
2199 | 1278 dsl_dataset_t *ds = arg1; |
4543 | 1279 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
789 | 1280 |
2199 | 1281 /* Mark it as inconsistent on-disk, in case we crash */ |
1282 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1283 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
4543 | 1284 |
1285 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
1286 cr, "dataset = %llu", ds->ds_object); | |
2199 | 1287 } |
789 | 1288 |
2199 | 1289 /* ARGSUSED */ |
5367 | 1290 int |
2199 | 1291 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
1292 { | |
1293 dsl_dataset_t *ds = arg1; | |
789 | 1294 |
1295 /* Can't delete a branch point. */ | |
2199 | 1296 if (ds->ds_phys->ds_num_children > 1) |
1297 return (EEXIST); | |
789 | 1298 |
1299 /* | |
1300 * Can't delete a head dataset if there are snapshots of it. | |
1301 * (Except if the only snapshots are from the branch we cloned | |
1302 * from.) | |
1303 */ | |
1304 if (ds->ds_prev != NULL && | |
2199 | 1305 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
789 | 1306 return (EINVAL); |
1307 | |
1308 /* | |
1309 * If we made changes this txg, traverse_dsl_dataset won't find | |
1310 * them. Try again. | |
1311 */ | |
2199 | 1312 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
789 | 1313 return (EAGAIN); |
2199 | 1314 |
1315 /* XXX we should do some i/o error checking... */ | |
1316 return (0); | |
1317 } | |
1318 | |
5367 | 1319 void |
4543 | 1320 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
2199 | 1321 { |
1322 dsl_dataset_t *ds = arg1; | |
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1323 int64_t used = 0, compressed = 0, uncompressed = 0; |
2199 | 1324 zio_t *zio; |
1325 int err; | |
1326 int after_branch_point = FALSE; | |
1327 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
1328 objset_t *mos = dp->dp_meta_objset; | |
1329 dsl_dataset_t *ds_prev = NULL; | |
1330 uint64_t obj; | |
1331 | |
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1332 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
2199 | 1333 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
1334 ASSERT(ds->ds_prev == NULL || | |
1335 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
1336 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
1337 | |
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1338 /* Remove our reservation */ |
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1339 if (ds->ds_reserved != 0) { |
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1340 uint64_t val = 0; |
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1341 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
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1342 ASSERT3U(ds->ds_reserved, ==, 0); |
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1343 } |
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1344 |
2199 | 1345 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
1346 | |
1347 obj = ds->ds_object; | |
789 | 1348 |
1349 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
1350 if (ds->ds_prev) { | |
1351 ds_prev = ds->ds_prev; | |
1352 } else { | |
2199 | 1353 VERIFY(0 == dsl_dataset_open_obj(dp, |
789 | 1354 ds->ds_phys->ds_prev_snap_obj, NULL, |
2199 | 1355 DS_MODE_NONE, FTAG, &ds_prev)); |
789 | 1356 } |
1357 after_branch_point = | |
1358 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
1359 | |
1360 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
1361 if (after_branch_point && | |
1362 ds->ds_phys->ds_next_snap_obj == 0) { | |
1363 /* This clone is toast. */ | |
1364 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
1365 ds_prev->ds_phys->ds_num_children--; | |
1366 } else if (!after_branch_point) { | |
1367 ds_prev->ds_phys->ds_next_snap_obj = | |
1368 ds->ds_phys->ds_next_snap_obj; | |
1369 } | |
1370 } | |
1371 | |
1372 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
1373 | |
1374 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
2199 | 1375 blkptr_t bp; |
789 | 1376 dsl_dataset_t *ds_next; |
1377 uint64_t itor = 0; | |
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1378 uint64_t old_unique; |
789 | 1379 |
1380 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
1381 | |
2199 | 1382 VERIFY(0 == dsl_dataset_open_obj(dp, |
1544 | 1383 ds->ds_phys->ds_next_snap_obj, NULL, |
1384 DS_MODE_NONE, FTAG, &ds_next)); | |
789 | 1385 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
1386 | |
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1387 old_unique = dsl_dataset_unique(ds_next); |
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1388 |
789 | 1389 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
1390 ds_next->ds_phys->ds_prev_snap_obj = | |
1391 ds->ds_phys->ds_prev_snap_obj; | |
1392 ds_next->ds_phys->ds_prev_snap_txg = | |
1393 ds->ds_phys->ds_prev_snap_txg; | |
1394 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
1395 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
1396 | |
1397 /* | |
1398 * Transfer to our deadlist (which will become next's | |
1399 * new deadlist) any entries from next's current | |
1400 * deadlist which were born before prev, and free the | |
1401 * other entries. | |
1402 * | |
1403 * XXX we're doing this long task with the config lock held | |
1404 */ | |
1405 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
1406 &bp) == 0) { | |
1407 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
1544 | 1408 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
1409 &bp, tx)); | |
789 | 1410 if (ds_prev && !after_branch_point && |
1411 bp.blk_birth > | |
1412 ds_prev->ds_phys->ds_prev_snap_txg) { | |
1413 ds_prev->ds_phys->ds_unique_bytes += | |
2082 | 1414 bp_get_dasize(dp->dp_spa, &bp); |
789 | 1415 } |
1416 } else { | |
2082 | 1417 used += bp_get_dasize(dp->dp_spa, &bp); |
789 | 1418 compressed += BP_GET_PSIZE(&bp); |
1419 uncompressed += BP_GET_UCSIZE(&bp); | |
1420 /* XXX check return value? */ | |
1421 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
1422 &bp, NULL, NULL, ARC_NOWAIT); | |
1423 } | |
1424 } | |
1425 | |
1426 /* free next's deadlist */ | |
1427 bplist_close(&ds_next->ds_deadlist); | |
1428 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
1429 | |
1430 /* set next's deadlist to our deadlist */ | |
1431 ds_next->ds_phys->ds_deadlist_obj = | |
1432 ds->ds_phys->ds_deadlist_obj; | |
1544 | 1433 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
1434 ds_next->ds_phys->ds_deadlist_obj)); | |
789 | 1435 ds->ds_phys->ds_deadlist_obj = 0; |
1436 | |
1437 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
1438 /* | |
1439 * Update next's unique to include blocks which | |
1440 * were previously shared by only this snapshot | |
1441 * and it. Those blocks will be born after the | |
1442 * prev snap and before this snap, and will have | |
1443 * died after the next snap and before the one | |
1444 * after that (ie. be on the snap after next's | |
1445 * deadlist). | |
1446 * | |
1447 * XXX we're doing this long task with the | |
1448 * config lock held | |
1449 */ | |
1450 dsl_dataset_t *ds_after_next; | |
1451 | |
2199 | 1452 VERIFY(0 == dsl_dataset_open_obj(dp, |
789 | 1453 ds_next->ds_phys->ds_next_snap_obj, NULL, |
1544 | 1454 DS_MODE_NONE, FTAG, &ds_after_next)); |
789 | 1455 itor = 0; |
1456 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
1457 &itor, &bp) == 0) { | |
1458 if (bp.blk_birth > | |
1459 ds->ds_phys->ds_prev_snap_txg && | |
1460 bp.blk_birth <= | |
1461 ds->ds_phys->ds_creation_txg) { | |
1462 ds_next->ds_phys->ds_unique_bytes += | |
2082 | 1463 bp_get_dasize(dp->dp_spa, &bp); |
789 | 1464 } |
1465 } | |
1466 | |
1467 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
1468 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
1469 } else { | |
1470 ASSERT3P(ds_next->ds_prev, ==, ds); | |
1471 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
1472 ds_next); | |
1473 if (ds_prev) { | |
2199 | 1474 VERIFY(0 == dsl_dataset_open_obj(dp, |
1544 | 1475 ds->ds_phys->ds_prev_snap_obj, NULL, |
1476 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
789 | 1477 } else { |
1478 ds_next->ds_prev = NULL; | |
1479 } | |
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1480 |
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1481 dsl_dataset_recalc_head_uniq(ds_next); |
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1482 |
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1483 /* |
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1484 * Reduce the amount of our unconsmed refreservation |
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1485 * being charged to our parent by the amount of |
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1486 * new unique data we have gained. |
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1487 */ |
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1488 if (old_unique < ds_next->ds_reserved) { |
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1489 int64_t mrsdelta; |
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1490 uint64_t new_unique = |
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1491 ds_next->ds_phys->ds_unique_bytes; |
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1492 |
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1493 ASSERT(old_unique <= new_unique); |
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1494 mrsdelta = MIN(new_unique - old_unique, |
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1495 ds_next->ds_reserved - old_unique); |
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1496 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
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1497 0, 0, tx); |
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1498 } |
789 | 1499 } |
1500 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
1501 | |
1502 /* | |
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1503 * NB: unique_bytes might not be accurate for the head objset. |
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1504 * Before SPA_VERSION 9, we didn't update its value when we |
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1505 * deleted the most recent snapshot. |
789 | 1506 */ |
1507 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
1508 } else { | |
1509 /* | |
1510 * There's no next snapshot, so this is a head dataset. | |
1511 * Destroy the deadlist. Unless it's a clone, the | |
1512 * deadlist should be empty. (If it's a clone, it's | |
1513 * safe to ignore the deadlist contents.) | |
1514 */ | |
1515 struct killarg ka; | |
1516 | |
1517 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
1518 bplist_close(&ds->ds_deadlist); | |
1519 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
1520 ds->ds_phys->ds_deadlist_obj = 0; | |
1521 | |
1522 /* | |
1523 * Free everything that we point to (that's born after | |
1524 * the previous snapshot, if we are a clone) | |
1525 * | |
1526 * XXX we're doing this long task with the config lock held | |
1527 */ | |
1528 ka.usedp = &used; | |
1529 ka.compressedp = &compressed; | |
1530 ka.uncompressedp = &uncompressed; | |
1531 ka.zio = zio; | |
1532 ka.tx = tx; | |
1533 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
1534 ADVANCE_POST, kill_blkptr, &ka); | |
1535 ASSERT3U(err, ==, 0); | |
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1536 ASSERT(spa_version(dp->dp_spa) < |
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1537 SPA_VERSION_UNIQUE_ACCURATE || |
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1538 used == ds->ds_phys->ds_unique_bytes); |
789 | 1539 } |
1540 | |
1541 err = zio_wait(zio); | |
1542 ASSERT3U(err, ==, 0); | |
1543 | |
2199 | 1544 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
789 | 1545 |
1546 if (ds->ds_phys->ds_snapnames_zapobj) { | |
1547 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
1548 ASSERT(err == 0); | |
1549 } | |
1550 | |
2199 | 1551 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
789 | 1552 /* Erase the link in the dataset */ |
2199 | 1553 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
1554 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
789 | 1555 /* |
1556 * dsl_dir_sync_destroy() called us, they'll destroy | |
1557 * the dataset. | |
1558 */ | |
1559 } else { | |
1560 /* remove from snapshot namespace */ | |
1561 dsl_dataset_t *ds_head; | |
2199 | 1562 VERIFY(0 == dsl_dataset_open_obj(dp, |
1563 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
1544 | 1564 DS_MODE_NONE, FTAG, &ds_head)); |
2207
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1565 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
789 | 1566 #ifdef ZFS_DEBUG |
1567 { | |
1568 uint64_t val; | |
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1569 |
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1570 err = dsl_dataset_snap_lookup(mos, |
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1571 ds_head->ds_phys->ds_flags, |
789 | 1572 ds_head->ds_phys->ds_snapnames_zapobj, |
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1573 ds->ds_snapname, &val); |
789 | 1574 ASSERT3U(err, ==, 0); |
1575 ASSERT3U(val, ==, obj); | |
1576 } | |
1577 #endif | |
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1578 err = dsl_dataset_snap_remove(mos, |
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1579 ds_head->ds_phys->ds_flags, |
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1580 ds_head->ds_phys->ds_snapnames_zapobj, |
2199 | 1581 ds->ds_snapname, tx); |
789 | 1582 ASSERT(err == 0); |
1583 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
1584 } | |
1585 | |
1586 if (ds_prev && ds->ds_prev != ds_prev) | |
1587 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
1588 | |
5094 | 1589 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
4543 | 1590 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
1591 cr, "dataset = %llu", ds->ds_object); | |
1592 | |
2199 | 1593 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
1594 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
3912 | 1595 |
2199 | 1596 } |
1597 | |
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1598 static int |
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1599 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
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1600 { |
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1601 uint64_t asize; |
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1602 |
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1603 if (!dmu_tx_is_syncing(tx)) |
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1604 return (0); |
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|
1605 |
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|
1606 /* |
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1607 * If there's an fs-only reservation, any blocks that might become |
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1608 * owned by the snapshot dataset must be accommodated by space |
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1609 * outside of the reservation. |
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|
1610 */ |
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|
1611 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1612 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
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|
1613 return (ENOSPC); |
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|
1614 |
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|
1615 /* |
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|
1616 * Propogate any reserved space for this snapshot to other |
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|
1617 * snapshot checks in this sync group. |
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|
1618 */ |
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|
1619 if (asize > 0) |
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|
1620 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
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|
1621 |
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|
1622 return (0); |
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|
1623 } |
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|
1624 |
2199 | 1625 /* ARGSUSED */ |
1626 int | |
1627 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
1628 { | |
5367 | 1629 dsl_dataset_t *ds = arg1; |
2199 | 1630 const char *snapname = arg2; |
1631 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
1632 int err; | |
1633 uint64_t value; | |
789 | 1634 |
1635 /* | |
2199 | 1636 * We don't allow multiple snapshots of the same txg. If there |
1637 * is already one, try again. | |
1638 */ | |
1639 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
1640 return (EAGAIN); | |
1641 | |
1642 /* | |
1643 * Check for conflicting name snapshot name. | |
789 | 1644 */ |
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1645 err = dsl_dataset_snap_lookup(mos, ds->ds_phys->ds_flags, |
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|
1646 ds->ds_phys->ds_snapnames_zapobj, snapname, &value); |
2199 | 1647 if (err == 0) |
1648 return (EEXIST); | |
1649 if (err != ENOENT) | |
1650 return (err); | |
789 | 1651 |
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|
1652 /* |
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1653 * Check that the dataset's name is not too long. Name consists |
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1654 * of the dataset's length + 1 for the @-sign + snapshot name's length |
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|
1655 */ |
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|
1656 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
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|
1657 return (ENAMETOOLONG); |
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|
1658 |
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1659 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
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1660 if (err) |
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|
1661 return (err); |
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|
1662 |
2199 | 1663 ds->ds_trysnap_txg = tx->tx_txg; |
789 | 1664 return (0); |
1665 } | |
1666 | |
2199 | 1667 void |
4543 | 1668 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
789 | 1669 { |
5367 | 1670 dsl_dataset_t *ds = arg1; |
2199 | 1671 const char *snapname = arg2; |
1672 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
789 | 1673 dmu_buf_t *dbuf; |
1674 dsl_dataset_phys_t *dsphys; | |
2199 | 1675 uint64_t dsobj; |
789 | 1676 objset_t *mos = dp->dp_meta_objset; |
1677 int err; | |
1678 | |
1679 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
2199 | 1680 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
789 | 1681 |
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|
1682 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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|
1683 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
1544 | 1684 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
789 | 1685 dmu_buf_will_dirty(dbuf, tx); |
1686 dsphys = dbuf->db_data; | |
2199 | 1687 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
789 | 1688 dsphys->ds_fsid_guid = unique_create(); |
1689 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
1690 sizeof (dsphys->ds_guid)); | |
1691 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
1692 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
1693 dsphys->ds_next_snap_obj = ds->ds_object; | |
1694 dsphys->ds_num_children = 1; | |
1695 dsphys->ds_creation_time = gethrestime_sec(); | |
1696 dsphys->ds_creation_txg = tx->tx_txg; | |
1697 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
1698 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
1699 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
1700 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
2082 | 1701 dsphys->ds_flags = ds->ds_phys->ds_flags; |
789 | 1702 dsphys->ds_bp = ds->ds_phys->ds_bp; |
1544 | 1703 dmu_buf_rele(dbuf, FTAG); |
789 | 1704 |
2199 | 1705 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
1706 if (ds->ds_prev) { | |
1707 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
789 | 1708 ds->ds_object || |
2199 | 1709 ds->ds_prev->ds_phys->ds_num_children > 1); |
1710 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
1711 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
789 | 1712 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
2199 | 1713 ds->ds_prev->ds_phys->ds_creation_txg); |
1714 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
789 | 1715 } |
1716 } | |
1717 | |
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1718 /* |
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1719 * If we have a reference-reservation on this dataset, we will |
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1720 * need to increase the amount of refreservation being charged |
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1721 * since our unique space is going to zero. |
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|
1722 */ |
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1723 if (ds->ds_reserved) { |
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1724 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1725 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
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1726 } |
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1727 |
789 | 1728 bplist_close(&ds->ds_deadlist); |
1729 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
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1730 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); |
789 | 1731 ds->ds_phys->ds_prev_snap_obj = dsobj; |
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1732 ds->ds_phys->ds_prev_snap_txg = tx->tx_txg; |
789 | 1733 ds->ds_phys->ds_unique_bytes = 0; |
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1734 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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1735 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
789 | 1736 ds->ds_phys->ds_deadlist_obj = |
1737 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
1544 | 1738 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
1739 ds->ds_phys->ds_deadlist_obj)); | |
789 | 1740 |
1741 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
1742 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
1743 snapname, 8, 1, &dsobj, tx); | |
1744 ASSERT(err == 0); | |
1745 | |
1746 if (ds->ds_prev) | |
1747 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
1544 | 1748 VERIFY(0 == dsl_dataset_open_obj(dp, |
1749 ds->ds_phys->ds_prev_snap_obj, snapname, | |
1750 DS_MODE_NONE, ds, &ds->ds_prev)); | |
4543 | 1751 |
1752 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
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1753 "dataset = %llu", dsobj); |
789 | 1754 } |
1755 | |
1756 void | |
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1757 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
789 | 1758 { |
1759 ASSERT(dmu_tx_is_syncing(tx)); | |
1760 ASSERT(ds->ds_user_ptr != NULL); | |
1761 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
1762 | |
4787 | 1763 /* |
1764 * in case we had to change ds_fsid_guid when we opened it, | |
1765 * sync it out now. | |
1766 */ | |
1767 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1768 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
1769 | |
789 | 1770 dsl_dir_dirty(ds->ds_dir, tx); |
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1771 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
789 | 1772 } |
1773 | |
1774 void | |
2885 | 1775 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
789 | 1776 { |
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1777 uint64_t refd, avail, uobjs, aobjs; |
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1778 |
2885 | 1779 dsl_dir_stats(ds->ds_dir, nv); |
789 | 1780 |
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1781 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
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1782 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
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1783 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
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1784 |
2885 | 1785 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
1786 ds->ds_phys->ds_creation_time); | |
1787 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
1788 ds->ds_phys->ds_creation_txg); | |
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1789 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1790 ds->ds_quota); |
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1791 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1792 ds->ds_reserved); |
789 | 1793 |
1794 if (ds->ds_phys->ds_next_snap_obj) { | |
1795 /* | |
1796 * This is a snapshot; override the dd's space used with | |
2885 | 1797 * our unique space and compression ratio. |
789 | 1798 */ |
2885 | 1799 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
1800 ds->ds_phys->ds_unique_bytes); | |
1801 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
1802 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
1803 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
1804 ds->ds_phys->ds_compressed_bytes)); | |
789 | 1805 } |
1806 } | |
1807 | |
2885 | 1808 void |
1809 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
789 | 1810 { |
2885 | 1811 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
1812 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
5367 | 1813 stat->dds_guid = ds->ds_phys->ds_guid; |
2885 | 1814 if (ds->ds_phys->ds_next_snap_obj) { |
1815 stat->dds_is_snapshot = B_TRUE; | |
1816 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
1817 } | |
1818 | |
1819 /* clone origin is really a dsl_dir thing... */ | |
5446 | 1820 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
5367 | 1821 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
2885 | 1822 dsl_dataset_t *ods; |
1823 | |
1824 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
5367 | 1825 ds->ds_dir->dd_phys->dd_origin_obj, |
2885 | 1826 NULL, DS_MODE_NONE, FTAG, &ods)); |
5367 | 1827 dsl_dataset_name(ods, stat->dds_origin); |
2885 | 1828 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
1829 } | |
5446 | 1830 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
2885 | 1831 } |
1832 | |
1833 uint64_t | |
1834 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
1835 { | |
4787 | 1836 return (ds->ds_fsid_guid); |
2885 | 1837 } |
1838 | |
1839 void | |
1840 dsl_dataset_space(dsl_dataset_t *ds, | |
1841 uint64_t *refdbytesp, uint64_t *availbytesp, | |
1842 uint64_t *usedobjsp, uint64_t *availobjsp) | |
1843 { | |
1844 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
1845 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
5378
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1846 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1847 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1848 if (ds->ds_quota != 0) { |
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1849 /* |
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1850 * Adjust available bytes according to refquota |
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1851 */ |
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1852 if (*refdbytesp < ds->ds_quota) |
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1853 *availbytesp = MIN(*availbytesp, |
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1854 ds->ds_quota - *refdbytesp); |
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1855 else |
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1856 *availbytesp = 0; |
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1857 } |
2885 | 1858 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
1859 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
789 | 1860 } |
1861 | |
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1862 boolean_t |
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1863 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1864 { |
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1865 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1866 |
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1867 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1868 dsl_pool_sync_context(dp)); |
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1869 if (ds->ds_prev == NULL) |
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1870 return (B_FALSE); |
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1871 if (ds->ds_phys->ds_bp.blk_birth > |
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1872 ds->ds_prev->ds_phys->ds_creation_txg) |
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1873 return (B_TRUE); |
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1874 return (B_FALSE); |
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1875 } |
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1876 |
2199 | 1877 /* ARGSUSED */ |
789 | 1878 static int |
2199 | 1879 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
789 | 1880 { |
2199 | 1881 dsl_dataset_t *ds = arg1; |
1882 char *newsnapname = arg2; | |
1883 dsl_dir_t *dd = ds->ds_dir; | |
789 | 1884 objset_t *mos = dd->dd_pool->dp_meta_objset; |
2199 | 1885 dsl_dataset_t *hds; |
1886 uint64_t val; | |
789 | 1887 int err; |
1888 | |
2199 | 1889 err = dsl_dataset_open_obj(dd->dd_pool, |
1890 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
789 | 1891 if (err) |
1892 return (err); | |
1893 | |
2199 | 1894 /* new name better not be in use */ |
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1895 err = dsl_dataset_snap_lookup(mos, hds->ds_phys->ds_flags, |
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1896 hds->ds_phys->ds_snapnames_zapobj, newsnapname, &val); |
2199 | 1897 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
789 | 1898 |
2199 | 1899 if (err == 0) |
1900 err = EEXIST; | |
1901 else if (err == ENOENT) | |
1902 err = 0; | |
4007 | 1903 |
1904 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
1905 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
1906 err = ENAMETOOLONG; | |
1907 | |
2199 | 1908 return (err); |
1909 } | |
789 | 1910 |
2199 | 1911 static void |
4543 | 1912 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
1913 cred_t *cr, dmu_tx_t *tx) | |
2199 | 1914 { |
1915 dsl_dataset_t *ds = arg1; | |
4543 | 1916 const char *newsnapname = arg2; |
2199 | 1917 dsl_dir_t *dd = ds->ds_dir; |
1918 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
1919 dsl_dataset_t *hds; | |
1920 int err; | |
789 | 1921 |
2199 | 1922 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
789 | 1923 |
2199 | 1924 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
1925 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
789 | 1926 |
2199 | 1927 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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1928 err = dsl_dataset_snap_remove(mos, hds->ds_phys->ds_flags, |
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1929 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, tx); |
789 | 1930 ASSERT3U(err, ==, 0); |
2199 | 1931 mutex_enter(&ds->ds_lock); |
1932 (void) strcpy(ds->ds_snapname, newsnapname); | |
1933 mutex_exit(&ds->ds_lock); | |
1934 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
1935 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
789 | 1936 ASSERT3U(err, ==, 0); |
1937 | |
4543 | 1938 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
1939 cr, "dataset = %llu", ds->ds_object); | |
2199 | 1940 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
789 | 1941 } |
1942 | |
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1943 struct renamesnaparg { |
4007 | 1944 dsl_sync_task_group_t *dstg; |
1945 char failed[MAXPATHLEN]; | |
1946 char *oldsnap; | |
1947 char *newsnap; | |
1948 }; | |
1949 | |
1950 static int | |
1951 dsl_snapshot_rename_one(char *name, void *arg) | |
1952 { | |
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1953 struct renamesnaparg *ra = arg; |
4007 | 1954 dsl_dataset_t *ds = NULL; |
1955 char *cp; | |
1956 int err; | |
1957 | |
1958 cp = name + strlen(name); | |
1959 *cp = '@'; | |
1960 (void) strcpy(cp + 1, ra->oldsnap); | |
4543 | 1961 |
1962 /* | |
1963 * For recursive snapshot renames the parent won't be changing | |
1964 * so we just pass name for both the to/from argument. | |
1965 */ | |
1966 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
1967 (void) strcpy(ra->failed, name); | |
1968 return (err); | |
1969 } | |
1970 | |
4007 | 1971 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
1972 ra->dstg, &ds); | |
1973 if (err == ENOENT) { | |
1974 *cp = '\0'; | |
1975 return (0); | |
1976 } | |
1977 if (err) { | |
1978 (void) strcpy(ra->failed, name); | |
1979 *cp = '\0'; | |
1980 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
1981 return (err); | |
1982 } | |
1983 | |
1984 #ifdef _KERNEL | |
1985 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
1986 (void) zfs_unmount_snap(name, NULL); | |
1987 #endif | |
1988 | |
1989 *cp = '\0'; | |
1990 | |
1991 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
1992 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
1993 | |
1994 return (0); | |
1995 } | |
1996 | |
1997 static int | |
1998 dsl_recursive_rename(char *oldname, const char *newname) | |
1999 { | |
2000 int err; | |
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2001 struct renamesnaparg *ra; |
4007 | 2002 dsl_sync_task_t *dst; |
2003 spa_t *spa; | |
2004 char *cp, *fsname = spa_strdup(oldname); | |
2005 int len = strlen(oldname); | |
2006 | |
2007 /* truncate the snapshot name to get the fsname */ | |
2008 cp = strchr(fsname, '@'); | |
2009 *cp = '\0'; | |
2010 | |
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2011 err = spa_open(fsname, &spa, FTAG); |
4007 | 2012 if (err) { |
2013 kmem_free(fsname, len + 1); | |
2014 return (err); | |
2015 } | |
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2016 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
4007 | 2017 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
2018 | |
2019 ra->oldsnap = strchr(oldname, '@') + 1; | |
2020 ra->newsnap = strchr(newname, '@') + 1; | |
2021 *ra->failed = '\0'; | |
2022 | |
2023 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
2024 DS_FIND_CHILDREN); | |
2025 kmem_free(fsname, len + 1); | |
2026 | |
2027 if (err == 0) { | |
2028 err = dsl_sync_task_group_wait(ra->dstg); | |
2029 } | |
2030 | |
2031 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
2032 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
2033 dsl_dataset_t *ds = dst->dst_arg1; | |
2034 if (dst->dst_err) { | |
2035 dsl_dir_name(ds->ds_dir, ra->failed); | |
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2036 (void) strcat(ra->failed, "@"); |
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2037 (void) strcat(ra->failed, ra->newsnap); |
4007 | 2038 } |
2039 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
2040 } | |
2041 | |
4543 | 2042 if (err) |
2043 (void) strcpy(oldname, ra->failed); | |
4007 | 2044 |
2045 dsl_sync_task_group_destroy(ra->dstg); | |
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2046 kmem_free(ra, sizeof (struct renamesnaparg)); |
4007 | 2047 spa_close(spa, FTAG); |
2048 return (err); | |
2049 } | |
2050 | |
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2051 static int |
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2052 dsl_valid_rename(char *oldname, void *arg) |
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2053 { |
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2054 int delta = *(int *)arg; |
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2055 |
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2056 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2057 return (ENAMETOOLONG); |
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2058 |
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2059 return (0); |
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2060 } |
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2061 |
789 | 2062 #pragma weak dmu_objset_rename = dsl_dataset_rename |
2063 int | |
4007 | 2064 dsl_dataset_rename(char *oldname, const char *newname, |
2065 boolean_t recursive) | |
789 | 2066 { |
2067 dsl_dir_t *dd; | |
2199 | 2068 dsl_dataset_t *ds; |
789 | 2069 const char *tail; |
2070 int err; | |
2071 | |
2199 | 2072 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
1544 | 2073 if (err) |
2074 return (err); | |
789 | 2075 if (tail == NULL) { |
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2076 int delta = strlen(newname) - strlen(oldname); |
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2077 |
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2078 /* if we're growing, validate child size lengths */ |
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2079 if (delta > 0) |
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2080 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2081 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2082 |
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2083 if (!err) |
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2084 err = dsl_dir_rename(dd, newname); |
789 | 2085 dsl_dir_close(dd, FTAG); |
2086 return (err); | |
2087 } | |
2088 if (tail[0] != '@') { | |
2089 /* the name ended in a nonexistant component */ | |
2090 dsl_dir_close(dd, FTAG); | |
2091 return (ENOENT); | |
2092 } | |
2093 | |
2199 | 2094 dsl_dir_close(dd, FTAG); |
2095 | |
2096 /* new name must be snapshot in same filesystem */ | |
2097 tail = strchr(newname, '@'); | |
2098 if (tail == NULL) | |
2099 return (EINVAL); | |
2100 tail++; | |
2101 if (strncmp(oldname, newname, tail - newname) != 0) | |
2102 return (EXDEV); | |
789 | 2103 |
4007 | 2104 if (recursive) { |
2105 err = dsl_recursive_rename(oldname, newname); | |
2106 } else { | |
2107 err = dsl_dataset_open(oldname, | |
2108 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
2109 if (err) | |
2110 return (err); | |
2199 | 2111 |
4007 | 2112 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
2113 dsl_dataset_snapshot_rename_check, | |
2114 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
2199 | 2115 |
4007 | 2116 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
2117 } | |
2199 | 2118 |
789 | 2119 return (err); |
2120 } | |
2082 | 2121 |
2199 | 2122 struct promotearg { |
2123 uint64_t used, comp, uncomp, unique; | |
6492
903545192033
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diff
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|
2124 uint64_t ds_flags, newnext_obj, snapnames_obj; |
2199 | 2125 }; |
2126 | |
4543 | 2127 /* ARGSUSED */ |
2082 | 2128 static int |
2199 | 2129 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
2082 | 2130 { |
2199 | 2131 dsl_dataset_t *hds = arg1; |
2132 struct promotearg *pa = arg2; | |
2133 dsl_dir_t *dd = hds->ds_dir; | |
2134 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
5367 | 2135 dsl_dir_t *odd = NULL; |
2082 | 2136 dsl_dataset_t *ds = NULL; |
5367 | 2137 dsl_dataset_t *origin_ds = NULL; |
2082 | 2138 dsl_dataset_t *newnext_ds = NULL; |
2139 int err; | |
2140 char *name = NULL; | |
2199 | 2141 uint64_t itor = 0; |
2082 | 2142 blkptr_t bp; |
2143 | |
2199 | 2144 bzero(pa, sizeof (*pa)); |
2145 | |
2082 | 2146 /* Check that it is a clone */ |
5367 | 2147 if (dd->dd_phys->dd_origin_obj == 0) |
2082 | 2148 return (EINVAL); |
2149 | |
2199 | 2150 /* Since this is so expensive, don't do the preliminary check */ |
2151 if (!dmu_tx_is_syncing(tx)) | |
2152 return (0); | |
2153 | |
5367 | 2154 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
2155 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
2082 | 2156 goto out; |
5367 | 2157 odd = origin_ds->ds_dir; |
2199 | 2158 |
2159 { | |
2160 dsl_dataset_t *phds; | |
2161 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
5367 | 2162 odd->dd_phys->dd_head_dataset_obj, |
2199 | 2163 NULL, DS_MODE_NONE, FTAG, &phds)) |
2164 goto out; | |
6492
903545192033
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diff
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2165 pa->ds_flags = phds->ds_phys->ds_flags; |
2199 | 2166 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; |
2167 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
2168 } | |
2082 | 2169 |
2170 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
2171 err = EXDEV; | |
2172 goto out; | |
2173 } | |
2174 | |
5367 | 2175 /* find origin's new next ds */ |
2082 | 2176 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
2177 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
5367 | 2178 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
2082 | 2179 dsl_dataset_t *prev; |
2180 | |
2181 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
2199 | 2182 newnext_ds->ds_phys->ds_prev_snap_obj, |
2183 NULL, DS_MODE_NONE, FTAG, &prev)) | |
2082 | 2184 goto out; |
2185 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
2186 newnext_ds = prev; | |
2187 } | |
2199 | 2188 pa->newnext_obj = newnext_ds->ds_object; |
2082 | 2189 |
5367 | 2190 /* compute origin's new unique space */ |
2082 | 2191 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
2192 &itor, &bp)) == 0) { | |
5367 | 2193 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
2199 | 2194 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
2082 | 2195 } |
2196 if (err != ENOENT) | |
2197 goto out; | |
2198 | |
2199 /* Walk the snapshots that we are moving */ | |
2200 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
5367 | 2201 ds = origin_ds; |
2082 | 2202 /* CONSTCOND */ |
2203 while (TRUE) { | |
2204 uint64_t val, dlused, dlcomp, dluncomp; | |
2205 dsl_dataset_t *prev; | |
2206 | |
2207 /* Check that the snapshot name does not conflict */ | |
2208 dsl_dataset_name(ds, name); | |
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2209 err = dsl_dataset_snap_lookup(dd->dd_pool->dp_meta_objset, |
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|
2210 hds->ds_phys->ds_flags, hds->ds_phys->ds_snapnames_zapobj, |
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|
2211 ds->ds_snapname, &val); |
2082 | 2212 if (err != ENOENT) { |
2213 if (err == 0) | |
2214 err = EEXIST; | |
2215 goto out; | |
2216 } | |
2217 | |
2218 /* | |
2219 * compute space to transfer. Each snapshot gave birth to: | |
2220 * (my used) - (prev's used) + (deadlist's used) | |
2221 */ | |
2199 | 2222 pa->used += ds->ds_phys->ds_used_bytes; |
2223 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
2224 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
2082 | 2225 |
2226 /* If we reach the first snapshot, we're done. */ | |
2227 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
2228 break; | |
2229 | |
2230 if (err = bplist_space(&ds->ds_deadlist, | |
2231 &dlused, &dlcomp, &dluncomp)) | |
2232 goto out; | |
2233 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
2234 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
2235 FTAG, &prev)) | |
2236 goto out; | |
2199 | 2237 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
2238 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
2239 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
2082 | 2240 |
2241 /* | |
2242 * We could be a clone of a clone. If we reach our | |
2243 * parent's branch point, we're done. | |
2244 */ | |
2245 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
2246 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
2247 break; | |
2248 } | |
5367 | 2249 if (ds != origin_ds) |
2082 | 2250 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
2251 ds = prev; | |
2252 } | |
2253 | |
2254 /* Check that there is enough space here */ | |
5367 | 2255 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
2199 | 2256 |
2257 out: | |
5367 | 2258 if (ds && ds != origin_ds) |
2199 | 2259 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
5367 | 2260 if (origin_ds) |
2261 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
2199 | 2262 if (newnext_ds) |
2263 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
2264 if (name) | |
2265 kmem_free(name, MAXPATHLEN); | |
2266 return (err); | |
2267 } | |
2082 | 2268 |
2199 | 2269 static void |
4543 | 2270 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
2199 | 2271 { |
2272 dsl_dataset_t *hds = arg1; | |
2273 struct promotearg *pa = arg2; | |
2274 dsl_dir_t *dd = hds->ds_dir; | |
2275 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
5367 | 2276 dsl_dir_t *odd = NULL; |
2277 dsl_dataset_t *ds, *origin_ds; | |
2199 | 2278 char *name; |
2279 | |
5367 | 2280 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
2199 | 2281 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
2282 | |
5367 | 2283 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
2284 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
2417 | 2285 /* |
5367 | 2286 * We need to explicitly open odd, since origin_ds's dd will be |
2417 | 2287 * changing. |
2288 */ | |
5367 | 2289 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
2290 NULL, FTAG, &odd)); | |
2082 | 2291 |
2292 /* move snapshots to this dir */ | |
2199 | 2293 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
5367 | 2294 ds = origin_ds; |
2082 | 2295 /* CONSTCOND */ |
2296 while (TRUE) { | |
2297 dsl_dataset_t *prev; | |
2298 | |
2299 /* move snap name entry */ | |
2300 dsl_dataset_name(ds, name); | |
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2301 VERIFY(0 == dsl_dataset_snap_remove(dp->dp_meta_objset, |
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2302 pa->ds_flags, pa->snapnames_obj, ds->ds_snapname, tx)); |
2199 | 2303 VERIFY(0 == zap_add(dp->dp_meta_objset, |
2082 | 2304 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
2305 8, 1, &ds->ds_object, tx)); | |
2306 | |
2307 /* change containing dsl_dir */ | |
2308 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
5367 | 2309 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
2082 | 2310 ds->ds_phys->ds_dir_obj = dd->dd_object; |
5367 | 2311 ASSERT3P(ds->ds_dir, ==, odd); |
2082 | 2312 dsl_dir_close(ds->ds_dir, ds); |
2199 | 2313 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
2082 | 2314 NULL, ds, &ds->ds_dir)); |
2315 | |
2316 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
2317 | |
2318 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
2319 break; | |
2320 | |
2199 | 2321 VERIFY(0 == dsl_dataset_open_obj(dp, |
2082 | 2322 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
2323 FTAG, &prev)); | |
2324 | |
2325 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
2326 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
2327 break; | |
2328 } | |
5367 | 2329 if (ds != origin_ds) |
2082 | 2330 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
2331 ds = prev; | |
2332 } | |
5367 | 2333 if (ds != origin_ds) |
2199 | 2334 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
2082 | 2335 |
5367 | 2336 /* change origin's next snap */ |
2337 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
2338 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
2082 | 2339 |
5367 | 2340 /* change origin */ |
2082 | 2341 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
5367 | 2342 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
2343 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
2344 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
2345 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
2082 | 2346 |
2347 /* change space accounting */ | |
5367 | 2348 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
2199 | 2349 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
5367 | 2350 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
2082 | 2351 |
4543 | 2352 /* log history record */ |
2353 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
2354 cr, "dataset = %llu", ds->ds_object); | |
2355 | |
5367 | 2356 dsl_dir_close(odd, FTAG); |
2357 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
2199 | 2358 kmem_free(name, MAXPATHLEN); |
2082 | 2359 } |
2360 | |
2361 int | |
2362 dsl_dataset_promote(const char *name) | |
2363 { | |
2364 dsl_dataset_t *ds; | |
2365 int err; | |
2366 dmu_object_info_t doi; | |
2199 | 2367 struct promotearg pa; |
2082 | 2368 |
2369 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
2370 if (err) | |
2371 return (err); | |
2372 | |
2373 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
2374 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
2375 if (err) { | |
2376 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
2377 return (err); | |
2378 } | |
2379 | |
2380 /* | |
2381 * Add in 128x the snapnames zapobj size, since we will be moving | |
2382 * a bunch of snapnames to the promoted ds, and dirtying their | |
2383 * bonus buffers. | |
2384 */ | |
2199 | 2385 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
2386 dsl_dataset_promote_check, | |
2387 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
2082 | 2388 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
2389 return (err); | |
2390 } | |
3912 | 2391 |
5367 | 2392 struct cloneswaparg { |
2393 dsl_dataset_t *cds; /* clone dataset */ | |
2394 dsl_dataset_t *ohds; /* origin's head dataset */ | |
2395 boolean_t force; | |
5481
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2396 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
5367 | 2397 }; |
5326
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2398 |
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2399 /* ARGSUSED */ |
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|
2400 static int |
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2401 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
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2402 { |
5367 | 2403 struct cloneswaparg *csa = arg1; |
5326
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2404 |
5367 | 2405 /* they should both be heads */ |
2406 if (dsl_dataset_is_snapshot(csa->cds) || | |
2407 dsl_dataset_is_snapshot(csa->ohds)) | |
5326
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2408 return (EINVAL); |
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2409 |
5367 | 2410 /* the branch point should be just before them */ |
2411 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
5326
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2412 return (EINVAL); |
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2413 |
5367 | 2414 /* cds should be the clone */ |
2415 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
2416 csa->ohds->ds_object) | |
2417 return (EINVAL); | |
5326
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2418 |
5367 | 2419 /* the clone should be a child of the origin */ |
2420 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
2421 return (EINVAL); | |
5326
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2422 |
5367 | 2423 /* ohds shouldn't be modified unless 'force' */ |
2424 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
2425 return (ETXTBSY); | |
5481
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2426 |
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2427 /* adjust amount of any unconsumed refreservation */ |
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2428 csa->unused_refres_delta = |
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2429 (int64_t)MIN(csa->ohds->ds_reserved, |
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2430 csa->ohds->ds_phys->ds_unique_bytes) - |
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2431 (int64_t)MIN(csa->ohds->ds_reserved, |
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2432 csa->cds->ds_phys->ds_unique_bytes); |
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2433 |
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2434 if (csa->unused_refres_delta > 0 && |
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2435 csa->unused_refres_delta > |
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2436 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
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2437 return (ENOSPC); |
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2438 |
5367 | 2439 return (0); |
5326
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2440 } |
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2441 |
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2442 /* ARGSUSED */ |
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2443 static void |
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2444 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
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2445 { |
5367 | 2446 struct cloneswaparg *csa = arg1; |
2447 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
5326
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2448 uint64_t itor = 0; |
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2449 blkptr_t bp; |
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2450 uint64_t unique = 0; |
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2451 int err; |
6752aa2bd5bc
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|
2452 |
5481
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|
2453 ASSERT(csa->cds->ds_reserved == 0); |
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|
2454 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
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|
2455 |
5367 | 2456 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
2457 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
2458 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
5326
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|
2459 |
5367 | 2460 if (csa->cds->ds_user_ptr != NULL) { |
2461 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
2462 csa->cds->ds_user_ptr = NULL; | |
2463 } | |
5326
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6425096 want online 'zfs recv' (read only and read/write)
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|
2464 |
5367 | 2465 if (csa->ohds->ds_user_ptr != NULL) { |
2466 csa->ohds->ds_user_evict_func(csa->ohds, | |
2467 csa->ohds->ds_user_ptr); | |
2468 csa->ohds->ds_user_ptr = NULL; | |
2469 } | |
5326
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|
2470 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2471 /* compute unique space */ |
5367 | 2472 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
2473 &itor, &bp)) == 0) { | |
2474 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
2475 unique += bp_get_dasize(dp->dp_spa, &bp); | |
5326
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|
2476 } |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2477 VERIFY(err == ENOENT); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2478 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2479 /* reset origin's unique bytes */ |
5367 | 2480 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
5326
6752aa2bd5bc
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|
2481 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2482 /* swap blkptrs */ |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2483 { |
6752aa2bd5bc
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|
2484 blkptr_t tmp; |
5367 | 2485 tmp = csa->ohds->ds_phys->ds_bp; |
2486 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
2487 csa->cds->ds_phys->ds_bp = tmp; | |
5326
6752aa2bd5bc
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|
2488 } |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2489 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2490 /* set dd_*_bytes */ |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2491 { |
6752aa2bd5bc
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|
2492 int64_t dused, dcomp, duncomp; |
6752aa2bd5bc
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|
2493 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
6752aa2bd5bc
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|
2494 uint64_t odl_used, odl_comp, odl_uncomp; |
6752aa2bd5bc
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|
2495 |
5367 | 2496 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
5326
6752aa2bd5bc
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|
2497 &cdl_comp, &cdl_uncomp)); |
5367 | 2498 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
5326
6752aa2bd5bc
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diff
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|
2499 &odl_comp, &odl_uncomp)); |
5367 | 2500 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
2501 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
2502 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
2503 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
2504 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
2505 cdl_uncomp - | |
2506 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
5326
6752aa2bd5bc
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|
2507 |
5367 | 2508 dsl_dir_diduse_space(csa->ohds->ds_dir, |
2509 dused, dcomp, duncomp, tx); | |
2510 dsl_dir_diduse_space(csa->cds->ds_dir, | |
2511 -dused, -dcomp, -duncomp, tx); | |
2512 } | |
2513 | |
2514 #define SWITCH64(x, y) \ | |
2515 { \ | |
2516 uint64_t __tmp = (x); \ | |
2517 (x) = (y); \ | |
2518 (y) = __tmp; \ | |
5326
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parents:
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diff
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|
2519 } |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2520 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
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|
2521 /* swap ds_*_bytes */ |
5367 | 2522 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
2523 csa->cds->ds_phys->ds_used_bytes); | |
2524 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
2525 csa->cds->ds_phys->ds_compressed_bytes); | |
2526 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
2527 csa->cds->ds_phys->ds_uncompressed_bytes); | |
5481
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|
2528 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
1364fb7de75d
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diff
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|
2529 csa->cds->ds_phys->ds_unique_bytes); |
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6619182 new non-sparse zvols should get refreservations
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changeset
|
2530 |
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6619182 new non-sparse zvols should get refreservations
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diff
changeset
|
2531 /* apply any parent delta for change in unconsumed refreservation */ |
1364fb7de75d
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|
2532 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
1364fb7de75d
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changeset
|
2533 0, 0, tx); |
5326
6752aa2bd5bc
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diff
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|
2534 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2535 /* swap deadlists */ |
5367 | 2536 bplist_close(&csa->cds->ds_deadlist); |
2537 bplist_close(&csa->ohds->ds_deadlist); | |
2538 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
2539 csa->cds->ds_phys->ds_deadlist_obj); | |
2540 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
2541 csa->cds->ds_phys->ds_deadlist_obj)); | |
2542 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
2543 csa->ohds->ds_phys->ds_deadlist_obj)); | |
5326
6752aa2bd5bc
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parents:
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diff
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|
2544 } |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2545 |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
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|
2546 /* |
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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diff
changeset
|
2547 * Swap 'clone' with its origin head file system. |
5326
6752aa2bd5bc
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|
2548 */ |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2549 int |
5367 | 2550 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
2551 boolean_t force) | |
5326
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|
2552 { |
5367 | 2553 struct cloneswaparg csa; |
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2554 |
5367 | 2555 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
2556 ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); | |
5326
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|
2557 |
5367 | 2558 csa.cds = clone; |
2559 csa.ohds = origin_head; | |
2560 csa.force = force; | |
2561 return (dsl_sync_task_do(clone->ds_dir->dd_pool, | |
5326
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|
2562 dsl_dataset_clone_swap_check, |
5367 | 2563 dsl_dataset_clone_swap_sync, &csa, NULL, 9)); |
5326
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|
2564 } |
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|
2565 |
3912 | 2566 /* |
2567 * Given a pool name and a dataset object number in that pool, | |
2568 * return the name of that dataset. | |
2569 */ | |
2570 int | |
2571 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
2572 { | |
2573 spa_t *spa; | |
2574 dsl_pool_t *dp; | |
2575 dsl_dataset_t *ds = NULL; | |
2576 int error; | |
2577 | |
2578 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
2579 return (error); | |
2580 dp = spa_get_dsl(spa); | |
2581 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
2582 if ((error = dsl_dataset_open_obj(dp, obj, | |
2583 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
2584 rw_exit(&dp->dp_config_rwlock); | |
2585 spa_close(spa, FTAG); | |
2586 return (error); | |
2587 } | |
2588 dsl_dataset_name(ds, buf); | |
2589 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
2590 rw_exit(&dp->dp_config_rwlock); | |
2591 spa_close(spa, FTAG); | |
2592 | |
2593 return (0); | |
2594 } | |
5378
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
2595 |
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
2596 int |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2597 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2598 uint64_t asize, uint64_t inflight, uint64_t *used, |
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2599 uint64_t *ref_rsrv) |
5378
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PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
2600 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2601 int error = 0; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2602 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
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|
2603 ASSERT3S(asize, >, 0); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
2604 |
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2605 /* |
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2606 * *ref_rsrv is the portion of asize that will come from any |
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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changeset
|
2607 * unconsumed refreservation space. |
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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|
2608 */ |
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|
2609 *ref_rsrv = 0; |
48655d6b290b
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|
2610 |
5378
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|
2611 mutex_enter(&ds->ds_lock); |
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
2612 /* |
111aa1baa84a
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|
2613 * Make a space adjustment for reserved bytes. |
111aa1baa84a
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|
2614 */ |
111aa1baa84a
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|
2615 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
111aa1baa84a
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|
2616 ASSERT3U(*used, >=, |
111aa1baa84a
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|
2617 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
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|
2618 *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
5831
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|
2619 *ref_rsrv = |
48655d6b290b
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|
2620 asize - MIN(asize, parent_delta(ds, asize + inflight)); |
5378
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|
2621 } |
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|
2622 |
111aa1baa84a
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|
2623 if (!check_quota || ds->ds_quota == 0) { |
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|
2624 mutex_exit(&ds->ds_lock); |
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|
2625 return (0); |
111aa1baa84a
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|
2626 } |
111aa1baa84a
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changeset
|
2627 /* |
111aa1baa84a
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changeset
|
2628 * If they are requesting more space, and our current estimate |
111aa1baa84a
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|
2629 * is over quota, they get to try again unless the actual |
111aa1baa84a
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|
2630 * on-disk is over quota and there are no pending changes (which |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2631 * may free up space for us). |
111aa1baa84a
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changeset
|
2632 */ |
111aa1baa84a
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|
2633 if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) { |
111aa1baa84a
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|
2634 if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota) |
111aa1baa84a
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ck153898
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changeset
|
2635 error = ERESTART; |
111aa1baa84a
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ck153898
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changeset
|
2636 else |
111aa1baa84a
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changeset
|
2637 error = EDQUOT; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2638 } |
111aa1baa84a
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|
2639 mutex_exit(&ds->ds_lock); |
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changeset
|
2640 |
111aa1baa84a
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changeset
|
2641 return (error); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2642 } |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2643 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2644 /* ARGSUSED */ |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2645 static int |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2646 dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2647 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2648 dsl_dataset_t *ds = arg1; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2649 uint64_t *quotap = arg2; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2650 uint64_t new_quota = *quotap; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2651 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2652 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2653 return (ENOTSUP); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2654 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2655 if (new_quota == 0) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2656 return (0); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2657 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2658 if (new_quota < ds->ds_phys->ds_used_bytes || |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2659 new_quota < ds->ds_reserved) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2660 return (ENOSPC); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2661 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2662 return (0); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2663 } |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2664 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2665 /* ARGSUSED */ |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2666 void |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2667 dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2668 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2669 dsl_dataset_t *ds = arg1; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2670 uint64_t *quotap = arg2; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2671 uint64_t new_quota = *quotap; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2672 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2673 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2674 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2675 mutex_enter(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2676 ds->ds_quota = new_quota; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2677 mutex_exit(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2678 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2679 dsl_prop_set_uint64_sync(ds->ds_dir, "refquota", new_quota, cr, tx); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2680 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2681 spa_history_internal_log(LOG_DS_REFQUOTA, ds->ds_dir->dd_pool->dp_spa, |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2682 tx, cr, "%lld dataset = %llu ", |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2683 (longlong_t)new_quota, ds->ds_dir->dd_phys->dd_head_dataset_obj); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2684 } |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2685 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2686 int |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2687 dsl_dataset_set_quota(const char *dsname, uint64_t quota) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2688 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2689 dsl_dataset_t *ds; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2690 int err; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2691 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2692 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2693 if (err) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2694 return (err); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2695 |
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2696 if (quota != ds->ds_quota) { |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2697 /* |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2698 * If someone removes a file, then tries to set the quota, we |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2699 * want to make sure the file freeing takes effect. |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2700 */ |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2701 txg_wait_open(ds->ds_dir->dd_pool, 0); |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2702 |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2703 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2704 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2705 ds, "a, 0); |
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2706 } |
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2707 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2708 return (err); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2709 } |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2710 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2711 static int |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2712 dsl_dataset_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2713 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2714 dsl_dataset_t *ds = arg1; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2715 uint64_t *reservationp = arg2; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2716 uint64_t new_reservation = *reservationp; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2717 int64_t delta; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2718 uint64_t unique; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2719 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2720 if (new_reservation > INT64_MAX) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2721 return (EOVERFLOW); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2722 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2723 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2724 SPA_VERSION_REFRESERVATION) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2725 return (ENOTSUP); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2726 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2727 if (dsl_dataset_is_snapshot(ds)) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2728 return (EINVAL); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2729 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2730 /* |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2731 * If we are doing the preliminary check in open context, the |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2732 * space estimates may be inaccurate. |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2733 */ |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2734 if (!dmu_tx_is_syncing(tx)) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2735 return (0); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2736 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2737 mutex_enter(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2738 unique = dsl_dataset_unique(ds); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2739 delta = MAX(unique, new_reservation) - MAX(unique, ds->ds_reserved); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2740 mutex_exit(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2741 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2742 if (delta > 0 && |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2743 delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2744 return (ENOSPC); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2745 if (delta > 0 && ds->ds_quota > 0 && |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2746 new_reservation > ds->ds_quota) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2747 return (ENOSPC); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2748 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2749 return (0); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2750 } |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2751 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2752 /* ARGSUSED */ |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2753 static void |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2754 dsl_dataset_set_reservation_sync(void *arg1, void *arg2, cred_t *cr, |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2755 dmu_tx_t *tx) |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2756 { |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2757 dsl_dataset_t *ds = arg1; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2758 uint64_t *reservationp = arg2; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2759 uint64_t new_reservation = *reservationp; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2760 uint64_t unique; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2761 int64_t delta; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2762 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2763 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2764 |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2765 mutex_enter(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2766 unique = dsl_dataset_unique(ds); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2767 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2768 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2769 ds->ds_reserved = new_reservation; |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2770 mutex_exit(&ds->ds_lock); |
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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2771 |
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2772 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
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2773 new_reservation, cr, tx); |
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2774 |
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2775 dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); |
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2776 |
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2777 spa_history_internal_log(LOG_DS_REFRESERV, |
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2778 ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", |
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2779 (longlong_t)new_reservation, |
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2780 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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2781 } |
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2782 |
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2783 int |
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2784 dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) |
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2785 { |
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2786 dsl_dataset_t *ds; |
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2787 int err; |
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2788 |
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2789 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
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2790 if (err) |
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2791 return (err); |
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2792 |
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2793 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
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2794 dsl_dataset_set_reservation_check, |
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2795 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
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2796 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
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2797 return (err); |
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2798 } |