Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 5569:d3caac36d311
6634062 dsl_dataset_open_obj misuses RW_LOCK_HELD
6634881 dsl_prop_register can release a lock it doesn't own
| author | ck153898 |
|---|---|
| date | Fri, 30 Nov 2007 13:22:52 -0800 |
| parents | 85721e07d1fa |
| children | 81f1af42bafc |
| rev | line source |
|---|---|
| 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 2007 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)); |
| 789 | 182 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
| 183 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 184 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 185 ds->ds_phys->ds_prev_snap_obj); | |
| 186 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); | |
| 187 if (ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 2082 | 188 ds->ds_object && bp->blk_birth > |
| 789 | 189 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
| 190 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 191 mutex_enter(&ds->ds_prev->ds_lock); | |
| 192 ds->ds_prev->ds_phys->ds_unique_bytes += | |
| 193 used; | |
| 194 mutex_exit(&ds->ds_prev->ds_lock); | |
| 195 } | |
| 196 } | |
| 197 } | |
| 198 mutex_enter(&ds->ds_lock); | |
| 199 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 200 ds->ds_phys->ds_used_bytes -= used; | |
| 201 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 202 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 203 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 204 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 205 mutex_exit(&ds->ds_lock); | |
| 206 } | |
| 207 | |
| 1544 | 208 uint64_t |
| 209 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 210 { |
| 2885 | 211 uint64_t trysnap = 0; |
| 212 | |
| 789 | 213 if (ds == NULL) |
| 1544 | 214 return (0); |
| 789 | 215 /* |
| 216 * The snapshot creation could fail, but that would cause an | |
| 217 * incorrect FALSE return, which would only result in an | |
| 218 * overestimation of the amount of space that an operation would | |
| 219 * consume, which is OK. | |
| 220 * | |
| 221 * There's also a small window where we could miss a pending | |
| 222 * snapshot, because we could set the sync task in the quiescing | |
| 223 * phase. So this should only be used as a guess. | |
| 224 */ | |
| 2885 | 225 if (ds->ds_trysnap_txg > |
| 226 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 227 trysnap = ds->ds_trysnap_txg; | |
| 228 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 229 } |
| 230 | |
| 231 int | |
| 232 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 233 { | |
| 234 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 235 } |
| 236 | |
| 237 /* ARGSUSED */ | |
| 238 static void | |
| 239 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 240 { | |
| 241 dsl_dataset_t *ds = dsv; | |
| 242 | |
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243 /* open_refcount == DS_REF_MAX when deleting */ |
| 789 | 244 ASSERT(ds->ds_open_refcount == 0 || |
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245 ds->ds_open_refcount == DS_REF_MAX); |
| 789 | 246 |
| 247 dprintf_ds(ds, "evicting %s\n", ""); | |
| 248 | |
| 4787 | 249 unique_remove(ds->ds_fsid_guid); |
| 789 | 250 |
| 251 if (ds->ds_user_ptr != NULL) | |
| 252 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 253 | |
| 254 if (ds->ds_prev) { | |
| 255 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 256 ds->ds_prev = NULL; | |
| 257 } | |
| 258 | |
| 259 bplist_close(&ds->ds_deadlist); | |
| 260 dsl_dir_close(ds->ds_dir, ds); | |
| 261 | |
| 4787 | 262 ASSERT(!list_link_active(&ds->ds_synced_link)); |
| 789 | 263 |
| 2856 | 264 mutex_destroy(&ds->ds_lock); |
| 4787 | 265 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 266 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 267 | |
| 789 | 268 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 269 } | |
| 270 | |
| 1544 | 271 static int |
| 789 | 272 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 273 { | |
| 274 dsl_dataset_phys_t *headphys; | |
| 275 int err; | |
| 276 dmu_buf_t *headdbuf; | |
| 277 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 278 objset_t *mos = dp->dp_meta_objset; | |
| 279 | |
| 280 if (ds->ds_snapname[0]) | |
| 1544 | 281 return (0); |
| 789 | 282 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 283 return (0); |
| 789 | 284 |
| 1544 | 285 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 286 FTAG, &headdbuf); | |
| 287 if (err) | |
| 288 return (err); | |
| 789 | 289 headphys = headdbuf->db_data; |
| 290 err = zap_value_search(dp->dp_meta_objset, | |
| 4577 | 291 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
| 1544 | 292 dmu_buf_rele(headdbuf, FTAG); |
| 293 return (err); | |
| 789 | 294 } |
| 295 | |
| 1544 | 296 int |
| 789 | 297 dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, |
| 1544 | 298 int mode, void *tag, dsl_dataset_t **dsp) |
| 789 | 299 { |
| 300 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 301 objset_t *mos = dp->dp_meta_objset; | |
| 302 dmu_buf_t *dbuf; | |
| 303 dsl_dataset_t *ds; | |
| 1544 | 304 int err; |
| 789 | 305 |
| 306 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 307 dsl_pool_sync_context(dp)); | |
| 308 | |
| 1544 | 309 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 310 if (err) | |
| 311 return (err); | |
| 789 | 312 ds = dmu_buf_get_user(dbuf); |
| 313 if (ds == NULL) { | |
| 314 dsl_dataset_t *winner; | |
| 315 | |
| 316 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 317 ds->ds_dbuf = dbuf; | |
| 318 ds->ds_object = dsobj; | |
| 319 ds->ds_phys = dbuf->db_data; | |
| 320 | |
| 2856 | 321 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 4787 | 322 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 323 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
| 324 NULL); | |
| 325 | |
| 1544 | 326 err = bplist_open(&ds->ds_deadlist, |
| 789 | 327 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 328 if (err == 0) { |
| 329 err = dsl_dir_open_obj(dp, | |
| 330 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 331 } | |
| 332 if (err) { | |
| 333 /* | |
| 334 * we don't really need to close the blist if we | |
| 335 * just opened it. | |
| 336 */ | |
| 2856 | 337 mutex_destroy(&ds->ds_lock); |
| 4787 | 338 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 339 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 1544 | 340 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 341 dmu_buf_rele(dbuf, tag); | |
| 342 return (err); | |
| 343 } | |
| 789 | 344 |
| 345 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 346 ds->ds_snapname[0] = '\0'; | |
| 347 if (ds->ds_phys->ds_prev_snap_obj) { | |
| 1544 | 348 err = dsl_dataset_open_obj(dp, |
| 789 | 349 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1544 | 350 DS_MODE_NONE, ds, &ds->ds_prev); |
| 789 | 351 } |
| 352 } else { | |
| 353 if (snapname) { | |
| 354 #ifdef ZFS_DEBUG | |
| 355 dsl_dataset_phys_t *headphys; | |
| 1544 | 356 dmu_buf_t *headdbuf; |
| 357 err = dmu_bonus_hold(mos, | |
| 358 ds->ds_dir->dd_phys->dd_head_dataset_obj, | |
| 359 FTAG, &headdbuf); | |
| 360 if (err == 0) { | |
| 361 headphys = headdbuf->db_data; | |
| 362 uint64_t foundobj; | |
| 363 err = zap_lookup(dp->dp_meta_objset, | |
| 364 headphys->ds_snapnames_zapobj, | |
| 365 snapname, sizeof (foundobj), 1, | |
| 366 &foundobj); | |
| 367 ASSERT3U(foundobj, ==, dsobj); | |
| 368 dmu_buf_rele(headdbuf, FTAG); | |
| 369 } | |
| 789 | 370 #endif |
| 371 (void) strcat(ds->ds_snapname, snapname); | |
| 372 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { | |
| 1544 | 373 err = dsl_dataset_get_snapname(ds); |
| 789 | 374 } |
| 375 } | |
| 376 | |
|
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377 if (!dsl_dataset_is_snapshot(ds)) { |
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378 /* |
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379 * In sync context, we're called with either no lock |
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380 * or with the write lock. If we're not syncing, |
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381 * we're always called with the read lock held. |
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382 */ |
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383 boolean_t need_lock = |
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384 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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385 dsl_pool_sync_context(dp); |
|
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386 |
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387 if (need_lock) |
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388 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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389 |
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390 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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391 "refreservation", sizeof (uint64_t), 1, |
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392 &ds->ds_reserved, NULL); |
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393 if (err == 0) { |
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394 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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395 "refquota", sizeof (uint64_t), 1, |
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396 &ds->ds_quota, NULL); |
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397 } |
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398 |
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399 if (need_lock) |
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400 rw_exit(&dp->dp_config_rwlock); |
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401 } else { |
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402 ds->ds_reserved = ds->ds_quota = 0; |
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403 } |
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404 |
| 1544 | 405 if (err == 0) { |
| 406 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 407 dsl_dataset_evict); | |
| 408 } | |
| 409 if (err || winner) { | |
| 789 | 410 bplist_close(&ds->ds_deadlist); |
| 411 if (ds->ds_prev) { | |
| 412 dsl_dataset_close(ds->ds_prev, | |
| 413 DS_MODE_NONE, ds); | |
| 414 } | |
| 415 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 416 mutex_destroy(&ds->ds_lock); |
| 4787 | 417 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 418 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 789 | 419 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 420 if (err) { |
| 421 dmu_buf_rele(dbuf, tag); | |
| 422 return (err); | |
| 423 } | |
| 789 | 424 ds = winner; |
| 425 } else { | |
| 4787 | 426 ds->ds_fsid_guid = |
| 789 | 427 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 428 } | |
| 429 } | |
| 430 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 431 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 432 | |
| 433 mutex_enter(&ds->ds_lock); | |
| 434 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 435 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 436 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
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437 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 438 mutex_exit(&ds->ds_lock); |
| 439 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 440 return (EBUSY); |
| 789 | 441 } |
| 442 ds->ds_open_refcount += weight; | |
| 443 mutex_exit(&ds->ds_lock); | |
| 444 | |
| 1544 | 445 *dsp = ds; |
| 446 return (0); | |
| 789 | 447 } |
| 448 | |
| 449 int | |
| 450 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 451 void *tag, dsl_dataset_t **dsp) | |
| 452 { | |
| 453 dsl_dir_t *dd; | |
| 454 dsl_pool_t *dp; | |
| 455 const char *tail; | |
| 456 uint64_t obj; | |
| 457 dsl_dataset_t *ds = NULL; | |
| 458 int err = 0; | |
| 459 | |
| 1544 | 460 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 461 if (err) | |
| 462 return (err); | |
| 789 | 463 |
| 464 dp = dd->dd_pool; | |
| 465 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 466 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 467 if (obj == 0) { | |
| 468 /* A dataset with no associated objset */ | |
| 469 err = ENOENT; | |
| 470 goto out; | |
| 471 } | |
| 472 | |
| 473 if (tail != NULL) { | |
| 474 objset_t *mos = dp->dp_meta_objset; | |
| 475 | |
| 1544 | 476 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 477 DS_MODE_NONE, tag, &ds); | |
| 478 if (err) | |
| 479 goto out; | |
| 789 | 480 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 481 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 482 ds = NULL; | |
| 483 | |
| 484 if (tail[0] != '@') { | |
| 485 err = ENOENT; | |
| 486 goto out; | |
| 487 } | |
| 488 tail++; | |
| 489 | |
| 490 /* Look for a snapshot */ | |
| 491 if (!DS_MODE_IS_READONLY(mode)) { | |
| 492 err = EROFS; | |
| 493 goto out; | |
| 494 } | |
| 495 dprintf("looking for snapshot '%s'\n", tail); | |
| 496 err = zap_lookup(mos, obj, tail, 8, 1, &obj); | |
| 497 if (err) | |
| 498 goto out; | |
| 499 } | |
| 1544 | 500 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 501 |
| 502 out: | |
| 503 rw_exit(&dp->dp_config_rwlock); | |
| 504 dsl_dir_close(dd, FTAG); | |
| 505 | |
| 506 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 507 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 508 | |
| 509 *dsp = ds; | |
| 510 return (err); | |
| 511 } | |
| 512 | |
| 513 int | |
| 514 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 515 { | |
| 516 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 517 } | |
| 518 | |
| 519 void | |
| 520 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 521 { | |
| 522 if (ds == NULL) { | |
| 523 (void) strcpy(name, "mos"); | |
| 524 } else { | |
| 525 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 526 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 527 if (ds->ds_snapname[0]) { |
| 528 (void) strcat(name, "@"); | |
| 529 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 530 /* | |
| 531 * We use a "recursive" mutex so that we | |
| 532 * can call dprintf_ds() with ds_lock held. | |
| 533 */ | |
| 534 mutex_enter(&ds->ds_lock); | |
| 535 (void) strcat(name, ds->ds_snapname); | |
| 536 mutex_exit(&ds->ds_lock); | |
| 537 } else { | |
| 538 (void) strcat(name, ds->ds_snapname); | |
| 539 } | |
| 540 } | |
| 541 } | |
| 542 } | |
| 543 | |
|
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544 static int |
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545 dsl_dataset_namelen(dsl_dataset_t *ds) |
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546 { |
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547 int result; |
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548 |
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549 if (ds == NULL) { |
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550 result = 3; /* "mos" */ |
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551 } else { |
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552 result = dsl_dir_namelen(ds->ds_dir); |
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553 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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554 if (ds->ds_snapname[0]) { |
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555 ++result; /* adding one for the @-sign */ |
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556 if (!MUTEX_HELD(&ds->ds_lock)) { |
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557 /* see dsl_datset_name */ |
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558 mutex_enter(&ds->ds_lock); |
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559 result += strlen(ds->ds_snapname); |
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560 mutex_exit(&ds->ds_lock); |
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561 } else { |
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562 result += strlen(ds->ds_snapname); |
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563 } |
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564 } |
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565 } |
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566 |
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567 return (result); |
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568 } |
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569 |
| 789 | 570 void |
| 571 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 572 { | |
| 573 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 574 mutex_enter(&ds->ds_lock); | |
| 575 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 576 ds->ds_open_refcount -= weight; | |
| 577 dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", | |
| 578 mode, ds->ds_open_refcount); | |
| 579 mutex_exit(&ds->ds_lock); | |
| 580 | |
| 1544 | 581 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 582 } |
| 583 | |
| 584 void | |
| 5367 | 585 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
| 586 { | |
| 587 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 588 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 589 mutex_enter(&ds->ds_lock); | |
| 590 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 591 ASSERT3U(oldweight, >=, newweight); | |
| 592 ds->ds_open_refcount -= oldweight; | |
| 593 ds->ds_open_refcount += newweight; | |
| 594 mutex_exit(&ds->ds_lock); | |
| 595 } | |
| 596 | |
| 597 boolean_t | |
| 598 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
| 599 { | |
| 600 boolean_t rv; | |
| 601 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 602 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 603 mutex_enter(&ds->ds_lock); | |
| 604 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 605 ASSERT3U(newweight, >=, oldweight); | |
| 606 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
| 607 rv = B_FALSE; | |
| 608 } else { | |
| 609 ds->ds_open_refcount -= oldweight; | |
| 610 ds->ds_open_refcount += newweight; | |
| 611 rv = B_TRUE; | |
| 612 } | |
| 613 mutex_exit(&ds->ds_lock); | |
| 614 return (rv); | |
| 615 } | |
| 616 | |
| 617 void | |
| 789 | 618 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 619 { | |
| 620 objset_t *mos = dp->dp_meta_objset; | |
| 621 dmu_buf_t *dbuf; | |
| 622 dsl_dataset_phys_t *dsphys; | |
| 623 dsl_dataset_t *ds; | |
| 624 uint64_t dsobj; | |
| 625 dsl_dir_t *dd; | |
| 626 | |
| 627 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 628 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 629 |
|
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630 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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631 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 632 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 633 dmu_buf_will_dirty(dbuf, tx); |
| 634 dsphys = dbuf->db_data; | |
| 635 dsphys->ds_dir_obj = dd->dd_object; | |
| 636 dsphys->ds_fsid_guid = unique_create(); | |
| 637 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 638 sizeof (dsphys->ds_guid)); | |
| 639 dsphys->ds_snapnames_zapobj = | |
|
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640 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 641 dsphys->ds_creation_time = gethrestime_sec(); |
| 642 dsphys->ds_creation_txg = tx->tx_txg; | |
| 643 dsphys->ds_deadlist_obj = | |
| 644 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
|
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645 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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646 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 647 dmu_buf_rele(dbuf, FTAG); |
| 789 | 648 |
| 649 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 650 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 651 dsl_dir_close(dd, FTAG); | |
| 652 | |
| 1544 | 653 VERIFY(0 == |
| 654 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
|
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655 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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656 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 657 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 658 } | |
| 659 | |
| 2199 | 660 uint64_t |
| 5367 | 661 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, dmu_tx_t *tx) |
| 789 | 662 { |
| 5367 | 663 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 664 dmu_buf_t *dbuf; |
| 665 dsl_dataset_phys_t *dsphys; | |
| 5367 | 666 uint64_t dsobj; |
| 789 | 667 objset_t *mos = dp->dp_meta_objset; |
| 668 | |
| 5367 | 669 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 670 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 671 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 672 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 673 |
|
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674 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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675 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 676 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 677 dmu_buf_will_dirty(dbuf, tx); |
| 678 dsphys = dbuf->db_data; | |
| 679 dsphys->ds_dir_obj = dd->dd_object; | |
| 680 dsphys->ds_fsid_guid = unique_create(); | |
| 681 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 682 sizeof (dsphys->ds_guid)); | |
| 683 dsphys->ds_snapnames_zapobj = | |
|
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684 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 685 dsphys->ds_creation_time = gethrestime_sec(); |
| 686 dsphys->ds_creation_txg = tx->tx_txg; | |
| 687 dsphys->ds_deadlist_obj = | |
| 688 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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689 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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690 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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691 |
| 5367 | 692 if (origin) { |
| 693 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 694 dsphys->ds_prev_snap_txg = |
| 5367 | 695 origin->ds_phys->ds_creation_txg; |
| 789 | 696 dsphys->ds_used_bytes = |
| 5367 | 697 origin->ds_phys->ds_used_bytes; |
| 789 | 698 dsphys->ds_compressed_bytes = |
| 5367 | 699 origin->ds_phys->ds_compressed_bytes; |
| 789 | 700 dsphys->ds_uncompressed_bytes = |
| 5367 | 701 origin->ds_phys->ds_uncompressed_bytes; |
| 702 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
| 789 | 703 |
| 5367 | 704 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 705 origin->ds_phys->ds_num_children++; | |
| 789 | 706 |
| 707 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 708 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 709 } |
| 1544 | 710 dmu_buf_rele(dbuf, FTAG); |
| 789 | 711 |
| 712 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 713 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 714 |
| 715 return (dsobj); | |
| 716 } | |
| 717 | |
| 718 uint64_t | |
| 719 dsl_dataset_create_sync(dsl_dir_t *pdd, | |
| 720 const char *lastname, dsl_dataset_t *origin, cred_t *cr, dmu_tx_t *tx) | |
| 721 { | |
| 722 dsl_pool_t *dp = pdd->dd_pool; | |
| 723 uint64_t dsobj, ddobj; | |
| 724 dsl_dir_t *dd; | |
| 725 | |
| 726 ASSERT(lastname[0] != '@'); | |
| 727 | |
| 728 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 729 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 730 | |
| 731 dsobj = dsl_dataset_create_sync_impl(dd, origin, tx); | |
| 732 | |
| 733 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 734 | |
| 789 | 735 dsl_dir_close(dd, FTAG); |
| 736 | |
| 2199 | 737 return (dsobj); |
| 738 } | |
| 739 | |
| 740 struct destroyarg { | |
| 741 dsl_sync_task_group_t *dstg; | |
| 742 char *snapname; | |
| 743 char *failed; | |
| 744 }; | |
| 745 | |
| 746 static int | |
| 747 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 748 { | |
| 749 struct destroyarg *da = arg; | |
| 750 dsl_dataset_t *ds; | |
| 751 char *cp; | |
| 752 int err; | |
| 753 | |
| 754 (void) strcat(name, "@"); | |
| 755 (void) strcat(name, da->snapname); | |
| 756 err = dsl_dataset_open(name, | |
| 757 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 758 da->dstg, &ds); |
| 2199 | 759 cp = strchr(name, '@'); |
| 760 *cp = '\0'; | |
| 761 if (err == ENOENT) | |
| 762 return (0); | |
| 763 if (err) { | |
| 764 (void) strcpy(da->failed, name); | |
| 765 return (err); | |
| 766 } | |
| 767 | |
| 768 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 769 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 770 return (0); |
| 771 } | |
| 772 | |
| 2199 | 773 /* |
| 774 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 775 */ | |
| 776 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 777 int | |
| 778 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 779 { | |
| 780 int err; | |
| 781 struct destroyarg da; | |
| 782 dsl_sync_task_t *dst; | |
| 783 spa_t *spa; | |
| 784 | |
|
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785 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 786 if (err) |
| 787 return (err); | |
| 788 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 789 da.snapname = snapname; | |
| 790 da.failed = fsname; | |
| 791 | |
| 792 err = dmu_objset_find(fsname, | |
| 2417 | 793 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 794 |
| 795 if (err == 0) | |
| 796 err = dsl_sync_task_group_wait(da.dstg); | |
| 797 | |
| 798 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 799 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 800 dsl_dataset_t *ds = dst->dst_arg1; | |
| 801 if (dst->dst_err) { | |
| 802 dsl_dataset_name(ds, fsname); | |
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803 *strchr(fsname, '@') = '\0'; |
| 2199 | 804 } |
| 805 /* | |
| 806 * If it was successful, destroy_sync would have | |
| 807 * closed the ds | |
| 808 */ | |
| 809 if (err) | |
| 4007 | 810 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 811 } |
| 812 | |
| 813 dsl_sync_task_group_destroy(da.dstg); | |
| 814 spa_close(spa, FTAG); | |
| 815 return (err); | |
| 816 } | |
| 817 | |
| 5367 | 818 /* |
| 819 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
| 820 * successful or not), ds will be closed and caller can no longer | |
| 821 * dereference it. | |
| 822 */ | |
| 789 | 823 int |
| 5367 | 824 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 825 { |
| 826 int err; | |
| 2199 | 827 dsl_sync_task_group_t *dstg; |
| 828 objset_t *os; | |
| 789 | 829 dsl_dir_t *dd; |
| 2199 | 830 uint64_t obj; |
| 831 | |
| 5367 | 832 if (ds->ds_open_refcount != DS_REF_MAX) { |
| 833 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
| 834 DS_MODE_EXCLUSIVE) == 0) { | |
| 835 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
| 836 return (EBUSY); | |
| 837 } | |
| 838 } | |
| 839 | |
| 840 if (dsl_dataset_is_snapshot(ds)) { | |
| 2199 | 841 /* Destroying a snapshot is simpler */ |
| 842 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 843 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 844 ds, tag, 0); |
| 845 goto out; | |
| 2199 | 846 } |
| 847 | |
| 848 dd = ds->ds_dir; | |
| 789 | 849 |
| 2199 | 850 /* |
| 851 * Check for errors and mark this ds as inconsistent, in | |
| 852 * case we crash while freeing the objects. | |
| 853 */ | |
| 854 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 855 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 856 if (err) |
| 857 goto out; | |
| 858 | |
| 859 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 860 if (err) | |
| 861 goto out; | |
| 2199 | 862 |
| 863 /* | |
| 864 * remove the objects in open context, so that we won't | |
| 865 * have too much to do in syncing context. | |
| 866 */ | |
|
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867 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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868 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 869 dmu_tx_t *tx = dmu_tx_create(os); |
| 870 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 871 dmu_tx_hold_bonus(tx, obj); | |
| 872 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 873 if (err) { | |
| 874 /* | |
| 875 * Perhaps there is not enough disk | |
| 876 * space. Just deal with it from | |
| 877 * dsl_dataset_destroy_sync(). | |
| 878 */ | |
| 879 dmu_tx_abort(tx); | |
| 880 continue; | |
| 881 } | |
| 882 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 883 dmu_tx_commit(tx); | |
| 884 } | |
| 885 /* Make sure it's not dirty before we finish destroying it. */ | |
| 886 txg_wait_synced(dd->dd_pool, 0); | |
| 887 | |
| 888 dmu_objset_close(os); | |
| 889 if (err != ESRCH) | |
| 5367 | 890 goto out; |
| 2199 | 891 |
| 5367 | 892 if (ds->ds_user_ptr) { |
| 893 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 894 ds->ds_user_ptr = NULL; | |
| 895 } | |
| 896 | |
| 897 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 898 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 899 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 900 | |
| 1544 | 901 if (err) |
| 5367 | 902 goto out; |
| 789 | 903 |
| 2199 | 904 /* |
| 905 * Blow away the dsl_dir + head dataset. | |
| 906 */ | |
| 907 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 908 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 909 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 910 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 911 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 912 err = dsl_sync_task_group_wait(dstg); | |
| 913 dsl_sync_task_group_destroy(dstg); | |
| 914 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 5367 | 915 if (err) |
| 2199 | 916 dsl_dir_close(dd, FTAG); |
| 5367 | 917 out: |
| 918 if (err) | |
| 919 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
| 789 | 920 return (err); |
| 921 } | |
| 922 | |
| 923 int | |
| 5367 | 924 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 925 { |
|
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926 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 5367 | 927 |
| 2199 | 928 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 929 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 930 ds, &ost, 0)); |
| 789 | 931 } |
| 932 | |
| 933 void * | |
| 934 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 935 void *p, dsl_dataset_evict_func_t func) | |
| 936 { | |
| 937 void *old; | |
| 938 | |
| 939 mutex_enter(&ds->ds_lock); | |
| 940 old = ds->ds_user_ptr; | |
| 941 if (old == NULL) { | |
| 942 ds->ds_user_ptr = p; | |
| 943 ds->ds_user_evict_func = func; | |
| 944 } | |
| 945 mutex_exit(&ds->ds_lock); | |
| 946 return (old); | |
| 947 } | |
| 948 | |
| 949 void * | |
| 950 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 951 { | |
| 952 return (ds->ds_user_ptr); | |
| 953 } | |
| 954 | |
| 955 | |
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956 blkptr_t * |
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957 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 958 { |
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959 return (&ds->ds_phys->ds_bp); |
| 789 | 960 } |
| 961 | |
| 962 void | |
| 963 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 964 { | |
| 965 ASSERT(dmu_tx_is_syncing(tx)); | |
| 966 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 967 if (ds == NULL) { | |
| 968 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 969 } else { | |
| 970 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 971 ds->ds_phys->ds_bp = *bp; | |
| 972 } | |
| 973 } | |
| 974 | |
| 975 spa_t * | |
| 976 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 977 { | |
| 978 return (ds->ds_dir->dd_pool->dp_spa); | |
| 979 } | |
| 980 | |
| 981 void | |
| 982 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 983 { | |
| 984 dsl_pool_t *dp; | |
| 985 | |
| 986 if (ds == NULL) /* this is the meta-objset */ | |
| 987 return; | |
| 988 | |
| 989 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 990 |
| 991 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 992 panic("dirtying snapshot!"); | |
| 789 | 993 |
| 994 dp = ds->ds_dir->dd_pool; | |
| 995 | |
| 996 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 997 /* up the hold count until we can be written out */ | |
| 998 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 999 } | |
| 1000 } | |
| 1001 | |
|
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1002 /* |
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1003 * The unique space in the head dataset can be calculated by subtracting |
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1004 * the space used in the most recent snapshot, that is still being used |
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1005 * in this file system, from the space currently in use. To figure out |
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1006 * the space in the most recent snapshot still in use, we need to take |
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1007 * the total space used in the snapshot and subtract out the space that |
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1008 * has been freed up since the snapshot was taken. |
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1009 */ |
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1010 static void |
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1011 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1012 { |
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1013 uint64_t mrs_used; |
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1014 uint64_t dlused, dlcomp, dluncomp; |
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1015 |
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1016 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1017 |
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1018 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1019 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1020 else |
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1021 mrs_used = 0; |
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1022 |
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1023 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1024 &dluncomp)); |
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1025 |
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1026 ASSERT3U(dlused, <=, mrs_used); |
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1027 ds->ds_phys->ds_unique_bytes = |
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1028 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1029 |
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1030 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1031 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1032 SPA_VERSION_UNIQUE_ACCURATE) |
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1033 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1034 } |
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1035 |
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1036 static uint64_t |
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1037 dsl_dataset_unique(dsl_dataset_t *ds) |
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1038 { |
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1039 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1040 dsl_dataset_recalc_head_uniq(ds); |
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1041 |
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1042 return (ds->ds_phys->ds_unique_bytes); |
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1043 } |
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1044 |
| 789 | 1045 struct killarg { |
|
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1046 int64_t *usedp; |
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1047 int64_t *compressedp; |
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1048 int64_t *uncompressedp; |
| 789 | 1049 zio_t *zio; |
| 1050 dmu_tx_t *tx; | |
| 1051 }; | |
| 1052 | |
| 1053 static int | |
| 1054 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1055 { | |
| 1056 struct killarg *ka = arg; | |
| 1057 blkptr_t *bp = &bc->bc_blkptr; | |
| 1058 | |
| 1059 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1060 | |
| 1061 /* | |
| 1062 * Since this callback is not called concurrently, no lock is | |
| 1063 * needed on the accounting values. | |
| 1064 */ | |
| 2082 | 1065 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1066 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1067 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1068 /* XXX check for EIO? */ | |
| 1069 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1070 ARC_NOWAIT); | |
| 1071 return (0); | |
| 1072 } | |
| 1073 | |
| 1074 /* ARGSUSED */ | |
| 2199 | 1075 static int |
| 1076 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1077 { |
| 2199 | 1078 dsl_dataset_t *ds = arg1; |
| 5367 | 1079 dmu_objset_type_t *ost = arg2; |
| 789 | 1080 |
| 2199 | 1081 /* |
| 5367 | 1082 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1083 */ |
| 5367 | 1084 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1085 return (EINVAL); |
| 1086 | |
| 2199 | 1087 /* |
| 1088 * This must not be a snapshot. | |
| 1089 */ | |
| 1090 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1091 return (EINVAL); | |
| 789 | 1092 |
| 1093 /* | |
| 1094 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1095 * them. Try again. | |
| 1096 */ | |
| 2199 | 1097 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1098 return (EAGAIN); |
| 2199 | 1099 |
| 1100 return (0); | |
| 1101 } | |
| 789 | 1102 |
| 2199 | 1103 /* ARGSUSED */ |
| 1104 static void | |
| 4543 | 1105 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1106 { |
| 1107 dsl_dataset_t *ds = arg1; | |
| 5367 | 1108 dmu_objset_type_t *ost = arg2; |
| 2199 | 1109 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1110 |
| 1111 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1112 | |
|
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1113 /* |
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1114 * Before the roll back destroy the zil. |
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1115 */ |
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1116 if (ds->ds_user_ptr != NULL) { |
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1117 zil_rollback_destroy( |
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1118 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1119 |
| 1120 /* | |
| 1121 * We need to make sure that the objset_impl_t is reopened after | |
| 1122 * we do the rollback, otherwise it will have the wrong | |
| 1123 * objset_phys_t. Normally this would happen when this | |
| 1124 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
| 1125 * dataset to be immediately evicted. But when doing "zfs recv | |
| 1126 * -F", we reopen the objset before that, so that there is no | |
| 1127 * window where the dataset is closed and inconsistent. | |
| 1128 */ | |
| 1129 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1130 ds->ds_user_ptr = NULL; | |
|
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1131 } |
|
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1132 |
| 789 | 1133 /* Zero out the deadlist. */ |
| 1134 bplist_close(&ds->ds_deadlist); | |
| 1135 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1136 ds->ds_phys->ds_deadlist_obj = | |
| 1137 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1138 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1139 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1140 |
| 1141 { | |
| 1142 /* Free blkptrs that we gave birth to */ | |
| 1143 zio_t *zio; | |
|
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1144 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1145 struct killarg ka; |
|
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1146 int64_t delta; |
| 789 | 1147 |
| 1148 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1149 ZIO_FLAG_MUSTSUCCEED); | |
| 1150 ka.usedp = &used; | |
| 1151 ka.compressedp = &compressed; | |
| 1152 ka.uncompressedp = &uncompressed; | |
| 1153 ka.zio = zio; | |
| 1154 ka.tx = tx; | |
| 1155 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1156 ADVANCE_POST, kill_blkptr, &ka); | |
| 1157 (void) zio_wait(zio); | |
| 1158 | |
|
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1159 /* only deduct space beyond any refreservation */ |
|
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1160 delta = parent_delta(ds, -used); |
| 2199 | 1161 dsl_dir_diduse_space(ds->ds_dir, |
|
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1162 delta, -compressed, -uncompressed, tx); |
| 789 | 1163 } |
| 1164 | |
| 5367 | 1165 if (ds->ds_prev) { |
| 1166 /* Change our contents to that of the prev snapshot */ | |
| 1167 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1168 ds->ds_phys->ds_prev_snap_obj); | |
| 1169 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1170 ds->ds_phys->ds_used_bytes = | |
| 1171 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1172 ds->ds_phys->ds_compressed_bytes = | |
| 1173 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1174 ds->ds_phys->ds_uncompressed_bytes = | |
| 1175 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1176 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1177 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1178 |
| 5367 | 1179 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1180 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1181 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1182 } | |
| 1183 } else { | |
| 1184 /* Zero out our contents, recreate objset */ | |
| 1185 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1186 ds->ds_phys->ds_used_bytes = 0; | |
| 1187 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1188 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1189 ds->ds_phys->ds_flags = 0; | |
| 1190 ds->ds_phys->ds_unique_bytes = 0; | |
| 1191 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1192 &ds->ds_phys->ds_bp, *ost, tx); | |
|
2532
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1193 } |
| 4543 | 1194 |
| 1195 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1196 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1197 } |
| 1198 | |
|
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1199 /* ARGSUSED */ |
|
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1200 static int |
| 2199 | 1201 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1202 { |
| 2199 | 1203 dsl_dataset_t *ds = arg1; |
| 5367 | 1204 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1205 uint64_t count; | |
| 1206 int err; | |
|
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1207 |
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1208 /* |
|
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1209 * Can't delete a head dataset if there are snapshots of it. |
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1210 * (Except if the only snapshots are from the branch we cloned |
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1211 * from.) |
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1212 */ |
|
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1213 if (ds->ds_prev != NULL && |
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1214 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
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1215 return (EINVAL); |
|
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1216 |
| 5367 | 1217 /* |
| 1218 * This is really a dsl_dir thing, but check it here so that | |
| 1219 * we'll be less likely to leave this dataset inconsistent & | |
| 1220 * nearly destroyed. | |
| 1221 */ | |
| 1222 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1223 if (err) | |
| 1224 return (err); | |
| 1225 if (count != 0) | |
| 1226 return (EEXIST); | |
| 1227 | |
|
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1228 return (0); |
|
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1229 } |
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1230 |
| 2199 | 1231 /* ARGSUSED */ |
| 1232 static void | |
| 4543 | 1233 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1234 { |
| 2199 | 1235 dsl_dataset_t *ds = arg1; |
| 4543 | 1236 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1237 |
| 2199 | 1238 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1239 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1240 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1241 |
| 1242 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1243 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1244 } |
| 789 | 1245 |
| 2199 | 1246 /* ARGSUSED */ |
| 5367 | 1247 int |
| 2199 | 1248 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1249 { | |
| 1250 dsl_dataset_t *ds = arg1; | |
| 789 | 1251 |
| 1252 /* Can't delete a branch point. */ | |
| 2199 | 1253 if (ds->ds_phys->ds_num_children > 1) |
| 1254 return (EEXIST); | |
| 789 | 1255 |
| 1256 /* | |
| 1257 * Can't delete a head dataset if there are snapshots of it. | |
| 1258 * (Except if the only snapshots are from the branch we cloned | |
| 1259 * from.) | |
| 1260 */ | |
| 1261 if (ds->ds_prev != NULL && | |
| 2199 | 1262 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1263 return (EINVAL); |
| 1264 | |
| 1265 /* | |
| 1266 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1267 * them. Try again. | |
| 1268 */ | |
| 2199 | 1269 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1270 return (EAGAIN); |
| 2199 | 1271 |
| 1272 /* XXX we should do some i/o error checking... */ | |
| 1273 return (0); | |
| 1274 } | |
| 1275 | |
| 5367 | 1276 void |
| 4543 | 1277 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1278 { |
| 1279 dsl_dataset_t *ds = arg1; | |
|
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1280 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1281 zio_t *zio; |
| 1282 int err; | |
| 1283 int after_branch_point = FALSE; | |
| 1284 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1285 objset_t *mos = dp->dp_meta_objset; | |
| 1286 dsl_dataset_t *ds_prev = NULL; | |
| 1287 uint64_t obj; | |
| 1288 | |
|
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1289 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1290 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1291 ASSERT(ds->ds_prev == NULL || | |
| 1292 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1293 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1294 | |
|
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1295 /* Remove our reservation */ |
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1296 if (ds->ds_reserved != 0) { |
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1297 uint64_t val = 0; |
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1298 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
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1299 ASSERT3U(ds->ds_reserved, ==, 0); |
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1300 } |
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1301 |
| 2199 | 1302 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1303 | |
| 1304 obj = ds->ds_object; | |
| 789 | 1305 |
| 1306 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1307 if (ds->ds_prev) { | |
| 1308 ds_prev = ds->ds_prev; | |
| 1309 } else { | |
| 2199 | 1310 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1311 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1312 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1313 } |
| 1314 after_branch_point = | |
| 1315 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1316 | |
| 1317 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1318 if (after_branch_point && | |
| 1319 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1320 /* This clone is toast. */ | |
| 1321 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1322 ds_prev->ds_phys->ds_num_children--; | |
| 1323 } else if (!after_branch_point) { | |
| 1324 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1325 ds->ds_phys->ds_next_snap_obj; | |
| 1326 } | |
| 1327 } | |
| 1328 | |
| 1329 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1330 | |
| 1331 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1332 blkptr_t bp; |
| 789 | 1333 dsl_dataset_t *ds_next; |
| 1334 uint64_t itor = 0; | |
|
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1335 uint64_t old_unique; |
| 789 | 1336 |
| 1337 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1338 | |
| 2199 | 1339 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1340 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1341 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1342 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1343 | |
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1344 old_unique = dsl_dataset_unique(ds_next); |
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1345 |
| 789 | 1346 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1347 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1348 ds->ds_phys->ds_prev_snap_obj; | |
| 1349 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1350 ds->ds_phys->ds_prev_snap_txg; | |
| 1351 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1352 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1353 | |
| 1354 /* | |
| 1355 * Transfer to our deadlist (which will become next's | |
| 1356 * new deadlist) any entries from next's current | |
| 1357 * deadlist which were born before prev, and free the | |
| 1358 * other entries. | |
| 1359 * | |
| 1360 * XXX we're doing this long task with the config lock held | |
| 1361 */ | |
| 1362 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1363 &bp) == 0) { | |
| 1364 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1365 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1366 &bp, tx)); | |
| 789 | 1367 if (ds_prev && !after_branch_point && |
| 1368 bp.blk_birth > | |
| 1369 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1370 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1371 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1372 } |
| 1373 } else { | |
| 2082 | 1374 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1375 compressed += BP_GET_PSIZE(&bp); |
| 1376 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1377 /* XXX check return value? */ | |
| 1378 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1379 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1380 } | |
| 1381 } | |
| 1382 | |
| 1383 /* free next's deadlist */ | |
| 1384 bplist_close(&ds_next->ds_deadlist); | |
| 1385 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1386 | |
| 1387 /* set next's deadlist to our deadlist */ | |
| 1388 ds_next->ds_phys->ds_deadlist_obj = | |
| 1389 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1390 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1391 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1392 ds->ds_phys->ds_deadlist_obj = 0; |
| 1393 | |
| 1394 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1395 /* | |
| 1396 * Update next's unique to include blocks which | |
| 1397 * were previously shared by only this snapshot | |
| 1398 * and it. Those blocks will be born after the | |
| 1399 * prev snap and before this snap, and will have | |
| 1400 * died after the next snap and before the one | |
| 1401 * after that (ie. be on the snap after next's | |
| 1402 * deadlist). | |
| 1403 * | |
| 1404 * XXX we're doing this long task with the | |
| 1405 * config lock held | |
| 1406 */ | |
| 1407 dsl_dataset_t *ds_after_next; | |
| 1408 | |
| 2199 | 1409 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1410 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1411 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1412 itor = 0; |
| 1413 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1414 &itor, &bp) == 0) { | |
| 1415 if (bp.blk_birth > | |
| 1416 ds->ds_phys->ds_prev_snap_txg && | |
| 1417 bp.blk_birth <= | |
| 1418 ds->ds_phys->ds_creation_txg) { | |
| 1419 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1420 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1421 } |
| 1422 } | |
| 1423 | |
| 1424 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1425 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1426 } else { | |
| 1427 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1428 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1429 ds_next); | |
| 1430 if (ds_prev) { | |
| 2199 | 1431 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1432 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1433 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1434 } else { |
| 1435 ds_next->ds_prev = NULL; | |
| 1436 } | |
|
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1437 |
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1438 dsl_dataset_recalc_head_uniq(ds_next); |
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1439 |
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1440 /* |
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1441 * Reduce the amount of our unconsmed refreservation |
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1442 * being charged to our parent by the amount of |
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1443 * new unique data we have gained. |
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1444 */ |
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1445 if (old_unique < ds_next->ds_reserved) { |
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1446 int64_t mrsdelta; |
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1447 uint64_t new_unique = |
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1448 ds_next->ds_phys->ds_unique_bytes; |
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1449 |
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1450 ASSERT(old_unique <= new_unique); |
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1451 mrsdelta = MIN(new_unique - old_unique, |
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1452 ds_next->ds_reserved - old_unique); |
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1453 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
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1454 0, 0, tx); |
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1455 } |
| 789 | 1456 } |
| 1457 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1458 | |
| 1459 /* | |
|
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1460 * NB: unique_bytes might not be accurate for the head objset. |
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1461 * Before SPA_VERSION 9, we didn't update its value when we |
|
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1462 * deleted the most recent snapshot. |
| 789 | 1463 */ |
| 1464 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1465 } else { | |
| 1466 /* | |
| 1467 * There's no next snapshot, so this is a head dataset. | |
| 1468 * Destroy the deadlist. Unless it's a clone, the | |
| 1469 * deadlist should be empty. (If it's a clone, it's | |
| 1470 * safe to ignore the deadlist contents.) | |
| 1471 */ | |
| 1472 struct killarg ka; | |
| 1473 | |
| 1474 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1475 bplist_close(&ds->ds_deadlist); | |
| 1476 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1477 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1478 | |
| 1479 /* | |
| 1480 * Free everything that we point to (that's born after | |
| 1481 * the previous snapshot, if we are a clone) | |
| 1482 * | |
| 1483 * XXX we're doing this long task with the config lock held | |
| 1484 */ | |
| 1485 ka.usedp = &used; | |
| 1486 ka.compressedp = &compressed; | |
| 1487 ka.uncompressedp = &uncompressed; | |
| 1488 ka.zio = zio; | |
| 1489 ka.tx = tx; | |
| 1490 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1491 ADVANCE_POST, kill_blkptr, &ka); | |
| 1492 ASSERT3U(err, ==, 0); | |
|
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1493 ASSERT(spa_version(dp->dp_spa) < |
|
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1494 SPA_VERSION_UNIQUE_ACCURATE || |
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1495 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1496 } |
| 1497 | |
| 1498 err = zio_wait(zio); | |
| 1499 ASSERT3U(err, ==, 0); | |
| 1500 | |
| 2199 | 1501 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1502 |
| 1503 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1504 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1505 ASSERT(err == 0); | |
| 1506 } | |
| 1507 | |
| 2199 | 1508 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1509 /* Erase the link in the dataset */ |
| 2199 | 1510 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1511 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1512 /* |
| 1513 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1514 * the dataset. | |
| 1515 */ | |
| 1516 } else { | |
| 1517 /* remove from snapshot namespace */ | |
| 1518 dsl_dataset_t *ds_head; | |
| 2199 | 1519 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1520 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1521 DS_MODE_NONE, FTAG, &ds_head)); |
|
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1522 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1523 #ifdef ZFS_DEBUG |
| 1524 { | |
| 1525 uint64_t val; | |
| 1526 err = zap_lookup(mos, | |
| 1527 ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1528 ds->ds_snapname, 8, 1, &val); |
| 789 | 1529 ASSERT3U(err, ==, 0); |
| 1530 ASSERT3U(val, ==, obj); | |
| 1531 } | |
| 1532 #endif | |
| 1533 err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1534 ds->ds_snapname, tx); |
| 789 | 1535 ASSERT(err == 0); |
| 1536 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1537 } | |
| 1538 | |
| 1539 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1540 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1541 | |
| 5094 | 1542 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1543 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1544 cr, "dataset = %llu", ds->ds_object); | |
| 1545 | |
| 2199 | 1546 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1547 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1548 |
| 2199 | 1549 } |
| 1550 | |
|
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1551 static int |
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1552 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
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1553 { |
|
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1554 uint64_t asize; |
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1555 |
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1556 if (!dmu_tx_is_syncing(tx)) |
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1557 return (0); |
|
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1558 |
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1559 /* |
|
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1560 * If there's an fs-only reservation, any blocks that might become |
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1561 * owned by the snapshot dataset must be accommodated by space |
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1562 * outside of the reservation. |
|
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1563 */ |
|
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1564 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1565 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
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1566 return (ENOSPC); |
|
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1567 |
|
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1568 /* |
|
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1569 * Propogate any reserved space for this snapshot to other |
|
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1570 * snapshot checks in this sync group. |
|
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1571 */ |
|
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1572 if (asize > 0) |
|
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1573 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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1574 |
|
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1575 return (0); |
|
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|
1576 } |
|
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|
1577 |
| 2199 | 1578 /* ARGSUSED */ |
| 1579 int | |
| 1580 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1581 { | |
| 5367 | 1582 dsl_dataset_t *ds = arg1; |
| 2199 | 1583 const char *snapname = arg2; |
| 1584 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1585 int err; | |
| 1586 uint64_t value; | |
| 789 | 1587 |
| 1588 /* | |
| 2199 | 1589 * We don't allow multiple snapshots of the same txg. If there |
| 1590 * is already one, try again. | |
| 1591 */ | |
| 1592 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1593 return (EAGAIN); | |
| 1594 | |
| 1595 /* | |
| 1596 * Check for conflicting name snapshot name. | |
| 789 | 1597 */ |
| 2199 | 1598 err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, |
| 1599 snapname, 8, 1, &value); | |
| 1600 if (err == 0) | |
| 1601 return (EEXIST); | |
| 1602 if (err != ENOENT) | |
| 1603 return (err); | |
| 789 | 1604 |
|
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1605 /* |
|
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1606 * Check that the dataset's name is not too long. Name consists |
|
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1607 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
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1608 */ |
|
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1609 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
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1610 return (ENAMETOOLONG); |
|
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1611 |
|
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1612 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
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1613 if (err) |
|
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1614 return (err); |
|
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1615 |
| 2199 | 1616 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1617 return (0); |
| 1618 } | |
| 1619 | |
| 2199 | 1620 void |
| 4543 | 1621 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1622 { |
| 5367 | 1623 dsl_dataset_t *ds = arg1; |
| 2199 | 1624 const char *snapname = arg2; |
| 1625 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1626 dmu_buf_t *dbuf; |
| 1627 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1628 uint64_t dsobj; |
| 789 | 1629 objset_t *mos = dp->dp_meta_objset; |
| 1630 int err; | |
| 1631 | |
| 1632 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1633 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1634 |
|
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1635 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
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1636 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1637 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1638 dmu_buf_will_dirty(dbuf, tx); |
| 1639 dsphys = dbuf->db_data; | |
| 2199 | 1640 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1641 dsphys->ds_fsid_guid = unique_create(); |
| 1642 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1643 sizeof (dsphys->ds_guid)); | |
| 1644 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1645 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1646 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1647 dsphys->ds_num_children = 1; | |
| 1648 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1649 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1650 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1651 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1652 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1653 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1654 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1655 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1656 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1657 |
| 2199 | 1658 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1659 if (ds->ds_prev) { | |
| 1660 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1661 ds->ds_object || |
| 2199 | 1662 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1663 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1664 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1665 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1666 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1667 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1668 } |
| 1669 } | |
| 1670 | |
|
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1671 /* |
|
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1672 * If we have a reference-reservation on this dataset, we will |
|
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1673 * need to increase the amount of refreservation being charged |
|
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1674 * since our unique space is going to zero. |
|
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1675 */ |
|
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|
1676 if (ds->ds_reserved) { |
|
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1677 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1678 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
|
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1679 } |
|
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1680 |
| 789 | 1681 bplist_close(&ds->ds_deadlist); |
| 1682 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1683 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, dsphys->ds_creation_txg); | |
| 1684 ds->ds_phys->ds_prev_snap_obj = dsobj; | |
| 1685 ds->ds_phys->ds_prev_snap_txg = dsphys->ds_creation_txg; | |
| 1686 ds->ds_phys->ds_unique_bytes = 0; | |
|
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1687 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
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1688 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1689 ds->ds_phys->ds_deadlist_obj = |
| 1690 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1691 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1692 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1693 |
| 1694 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1695 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1696 snapname, 8, 1, &dsobj, tx); | |
| 1697 ASSERT(err == 0); | |
| 1698 | |
| 1699 if (ds->ds_prev) | |
| 1700 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1701 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1702 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1703 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 4543 | 1704 |
| 1705 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
|
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1706 "dataset = %llu", dsobj); |
| 789 | 1707 } |
| 1708 | |
| 1709 void | |
|
3547
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|
1710 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1711 { |
| 1712 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1713 ASSERT(ds->ds_user_ptr != NULL); | |
| 1714 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1715 | |
| 4787 | 1716 /* |
| 1717 * in case we had to change ds_fsid_guid when we opened it, | |
| 1718 * sync it out now. | |
| 1719 */ | |
| 1720 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1721 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1722 | |
| 789 | 1723 dsl_dir_dirty(ds->ds_dir, tx); |
|
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1724 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1725 } |
| 1726 | |
| 1727 void | |
| 2885 | 1728 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1729 { |
|
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1730 uint64_t refd, avail, uobjs, aobjs; |
|
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1731 |
| 2885 | 1732 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1733 |
|
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1734 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
|
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1735 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
|
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1736 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
|
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1737 |
| 2885 | 1738 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1739 ds->ds_phys->ds_creation_time); | |
| 1740 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1741 ds->ds_phys->ds_creation_txg); | |
|
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1742 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1743 ds->ds_quota); |
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1744 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1745 ds->ds_reserved); |
| 789 | 1746 |
| 1747 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1748 /* | |
| 1749 * This is a snapshot; override the dd's space used with | |
| 2885 | 1750 * our unique space and compression ratio. |
| 789 | 1751 */ |
| 2885 | 1752 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1753 ds->ds_phys->ds_unique_bytes); | |
| 1754 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1755 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1756 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1757 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1758 } |
| 1759 } | |
| 1760 | |
| 2885 | 1761 void |
| 1762 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1763 { |
| 2885 | 1764 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1765 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1766 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1767 if (ds->ds_phys->ds_next_snap_obj) { |
| 1768 stat->dds_is_snapshot = B_TRUE; | |
| 1769 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1770 } | |
| 1771 | |
| 1772 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1773 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1774 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1775 dsl_dataset_t *ods; |
| 1776 | |
| 1777 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 5367 | 1778 ds->ds_dir->dd_phys->dd_origin_obj, |
| 2885 | 1779 NULL, DS_MODE_NONE, FTAG, &ods)); |
| 5367 | 1780 dsl_dataset_name(ods, stat->dds_origin); |
| 2885 | 1781 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
| 1782 } | |
| 5446 | 1783 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1784 } |
| 1785 | |
| 1786 uint64_t | |
| 1787 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1788 { | |
| 4787 | 1789 return (ds->ds_fsid_guid); |
| 2885 | 1790 } |
| 1791 | |
| 1792 void | |
| 1793 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1794 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1795 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1796 { | |
| 1797 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1798 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
|
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1799 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
|
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1800 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
|
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1801 if (ds->ds_quota != 0) { |
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1802 /* |
|
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1803 * Adjust available bytes according to refquota |
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1804 */ |
|
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1805 if (*refdbytesp < ds->ds_quota) |
|
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1806 *availbytesp = MIN(*availbytesp, |
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1807 ds->ds_quota - *refdbytesp); |
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1808 else |
|
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1809 *availbytesp = 0; |
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1810 } |
| 2885 | 1811 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1812 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1813 } |
| 1814 | |
|
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1815 boolean_t |
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1816 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1817 { |
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1818 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1819 |
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1820 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
|
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1821 dsl_pool_sync_context(dp)); |
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1822 if (ds->ds_prev == NULL) |
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1823 return (B_FALSE); |
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1824 if (ds->ds_phys->ds_bp.blk_birth > |
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1825 ds->ds_prev->ds_phys->ds_creation_txg) |
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1826 return (B_TRUE); |
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1827 return (B_FALSE); |
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1828 } |
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1829 |
| 2199 | 1830 /* ARGSUSED */ |
| 789 | 1831 static int |
| 2199 | 1832 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1833 { |
| 2199 | 1834 dsl_dataset_t *ds = arg1; |
| 1835 char *newsnapname = arg2; | |
| 1836 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1837 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1838 dsl_dataset_t *hds; |
| 1839 uint64_t val; | |
| 789 | 1840 int err; |
| 1841 | |
| 2199 | 1842 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1843 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1844 if (err) |
| 1845 return (err); | |
| 1846 | |
| 2199 | 1847 /* new name better not be in use */ |
| 1848 err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1849 newsnapname, 8, 1, &val); | |
| 1850 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); | |
| 789 | 1851 |
| 2199 | 1852 if (err == 0) |
| 1853 err = EEXIST; | |
| 1854 else if (err == ENOENT) | |
| 1855 err = 0; | |
| 4007 | 1856 |
| 1857 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1858 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1859 err = ENAMETOOLONG; | |
| 1860 | |
| 2199 | 1861 return (err); |
| 1862 } | |
| 789 | 1863 |
| 2199 | 1864 static void |
| 4543 | 1865 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1866 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1867 { |
| 1868 dsl_dataset_t *ds = arg1; | |
| 4543 | 1869 const char *newsnapname = arg2; |
| 2199 | 1870 dsl_dir_t *dd = ds->ds_dir; |
| 1871 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1872 dsl_dataset_t *hds; | |
| 1873 int err; | |
| 789 | 1874 |
| 2199 | 1875 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1876 |
| 2199 | 1877 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1878 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1879 |
| 2199 | 1880 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 1881 err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1882 ds->ds_snapname, tx); | |
| 789 | 1883 ASSERT3U(err, ==, 0); |
| 2199 | 1884 mutex_enter(&ds->ds_lock); |
| 1885 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1886 mutex_exit(&ds->ds_lock); | |
| 1887 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1888 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1889 ASSERT3U(err, ==, 0); |
| 1890 | |
| 4543 | 1891 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 1892 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1893 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1894 } |
| 1895 | |
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1896 struct renamesnaparg { |
| 4007 | 1897 dsl_sync_task_group_t *dstg; |
| 1898 char failed[MAXPATHLEN]; | |
| 1899 char *oldsnap; | |
| 1900 char *newsnap; | |
| 1901 }; | |
| 1902 | |
| 1903 static int | |
| 1904 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1905 { | |
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1906 struct renamesnaparg *ra = arg; |
| 4007 | 1907 dsl_dataset_t *ds = NULL; |
| 1908 char *cp; | |
| 1909 int err; | |
| 1910 | |
| 1911 cp = name + strlen(name); | |
| 1912 *cp = '@'; | |
| 1913 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 1914 |
| 1915 /* | |
| 1916 * For recursive snapshot renames the parent won't be changing | |
| 1917 * so we just pass name for both the to/from argument. | |
| 1918 */ | |
| 1919 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 1920 (void) strcpy(ra->failed, name); | |
| 1921 return (err); | |
| 1922 } | |
| 1923 | |
| 4007 | 1924 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
| 1925 ra->dstg, &ds); | |
| 1926 if (err == ENOENT) { | |
| 1927 *cp = '\0'; | |
| 1928 return (0); | |
| 1929 } | |
| 1930 if (err) { | |
| 1931 (void) strcpy(ra->failed, name); | |
| 1932 *cp = '\0'; | |
| 1933 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1934 return (err); | |
| 1935 } | |
| 1936 | |
| 1937 #ifdef _KERNEL | |
| 1938 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1939 (void) zfs_unmount_snap(name, NULL); | |
| 1940 #endif | |
| 1941 | |
| 1942 *cp = '\0'; | |
| 1943 | |
| 1944 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1945 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1946 | |
| 1947 return (0); | |
| 1948 } | |
| 1949 | |
| 1950 static int | |
| 1951 dsl_recursive_rename(char *oldname, const char *newname) | |
| 1952 { | |
| 1953 int err; | |
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1954 struct renamesnaparg *ra; |
| 4007 | 1955 dsl_sync_task_t *dst; |
| 1956 spa_t *spa; | |
| 1957 char *cp, *fsname = spa_strdup(oldname); | |
| 1958 int len = strlen(oldname); | |
| 1959 | |
| 1960 /* truncate the snapshot name to get the fsname */ | |
| 1961 cp = strchr(fsname, '@'); | |
| 1962 *cp = '\0'; | |
| 1963 | |
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1964 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 1965 if (err) { |
| 1966 kmem_free(fsname, len + 1); | |
| 1967 return (err); | |
| 1968 } | |
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1969 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 1970 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 1971 | |
| 1972 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 1973 ra->newsnap = strchr(newname, '@') + 1; | |
| 1974 *ra->failed = '\0'; | |
| 1975 | |
| 1976 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 1977 DS_FIND_CHILDREN); | |
| 1978 kmem_free(fsname, len + 1); | |
| 1979 | |
| 1980 if (err == 0) { | |
| 1981 err = dsl_sync_task_group_wait(ra->dstg); | |
| 1982 } | |
| 1983 | |
| 1984 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 1985 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 1986 dsl_dataset_t *ds = dst->dst_arg1; | |
| 1987 if (dst->dst_err) { | |
| 1988 dsl_dir_name(ds->ds_dir, ra->failed); | |
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1989 (void) strcat(ra->failed, "@"); |
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1990 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 1991 } |
| 1992 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1993 } | |
| 1994 | |
| 4543 | 1995 if (err) |
| 1996 (void) strcpy(oldname, ra->failed); | |
| 4007 | 1997 |
| 1998 dsl_sync_task_group_destroy(ra->dstg); | |
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1999 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 2000 spa_close(spa, FTAG); |
| 2001 return (err); | |
| 2002 } | |
| 2003 | |
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2004 static int |
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2005 dsl_valid_rename(char *oldname, void *arg) |
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2006 { |
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2007 int delta = *(int *)arg; |
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2008 |
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2009 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2010 return (ENAMETOOLONG); |
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2011 |
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2012 return (0); |
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2013 } |
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2014 |
| 789 | 2015 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2016 int | |
| 4007 | 2017 dsl_dataset_rename(char *oldname, const char *newname, |
| 2018 boolean_t recursive) | |
| 789 | 2019 { |
| 2020 dsl_dir_t *dd; | |
| 2199 | 2021 dsl_dataset_t *ds; |
| 789 | 2022 const char *tail; |
| 2023 int err; | |
| 2024 | |
| 2199 | 2025 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2026 if (err) |
| 2027 return (err); | |
| 789 | 2028 if (tail == NULL) { |
|
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2029 int delta = strlen(newname) - strlen(oldname); |
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2030 |
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2031 /* if we're growing, validate child size lengths */ |
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2032 if (delta > 0) |
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2033 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2034 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2035 |
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2036 if (!err) |
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2037 err = dsl_dir_rename(dd, newname); |
| 789 | 2038 dsl_dir_close(dd, FTAG); |
| 2039 return (err); | |
| 2040 } | |
| 2041 if (tail[0] != '@') { | |
| 2042 /* the name ended in a nonexistant component */ | |
| 2043 dsl_dir_close(dd, FTAG); | |
| 2044 return (ENOENT); | |
| 2045 } | |
| 2046 | |
| 2199 | 2047 dsl_dir_close(dd, FTAG); |
| 2048 | |
| 2049 /* new name must be snapshot in same filesystem */ | |
| 2050 tail = strchr(newname, '@'); | |
| 2051 if (tail == NULL) | |
| 2052 return (EINVAL); | |
| 2053 tail++; | |
| 2054 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2055 return (EXDEV); | |
| 789 | 2056 |
| 4007 | 2057 if (recursive) { |
| 2058 err = dsl_recursive_rename(oldname, newname); | |
| 2059 } else { | |
| 2060 err = dsl_dataset_open(oldname, | |
| 2061 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 2062 if (err) | |
| 2063 return (err); | |
| 2199 | 2064 |
| 4007 | 2065 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2066 dsl_dataset_snapshot_rename_check, | |
| 2067 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2068 |
| 4007 | 2069 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 2070 } | |
| 2199 | 2071 |
| 789 | 2072 return (err); |
| 2073 } | |
| 2082 | 2074 |
| 2199 | 2075 struct promotearg { |
| 2076 uint64_t used, comp, uncomp, unique; | |
| 2077 uint64_t newnext_obj, snapnames_obj; | |
| 2078 }; | |
| 2079 | |
| 4543 | 2080 /* ARGSUSED */ |
| 2082 | 2081 static int |
| 2199 | 2082 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2083 { |
| 2199 | 2084 dsl_dataset_t *hds = arg1; |
| 2085 struct promotearg *pa = arg2; | |
| 2086 dsl_dir_t *dd = hds->ds_dir; | |
| 2087 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2088 dsl_dir_t *odd = NULL; |
| 2082 | 2089 dsl_dataset_t *ds = NULL; |
| 5367 | 2090 dsl_dataset_t *origin_ds = NULL; |
| 2082 | 2091 dsl_dataset_t *newnext_ds = NULL; |
| 2092 int err; | |
| 2093 char *name = NULL; | |
| 2199 | 2094 uint64_t itor = 0; |
| 2082 | 2095 blkptr_t bp; |
| 2096 | |
| 2199 | 2097 bzero(pa, sizeof (*pa)); |
| 2098 | |
| 2082 | 2099 /* Check that it is a clone */ |
| 5367 | 2100 if (dd->dd_phys->dd_origin_obj == 0) |
| 2082 | 2101 return (EINVAL); |
| 2102 | |
| 2199 | 2103 /* Since this is so expensive, don't do the preliminary check */ |
| 2104 if (!dmu_tx_is_syncing(tx)) | |
| 2105 return (0); | |
| 2106 | |
| 5367 | 2107 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2108 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
| 2082 | 2109 goto out; |
| 5367 | 2110 odd = origin_ds->ds_dir; |
| 2199 | 2111 |
| 2112 { | |
| 2113 dsl_dataset_t *phds; | |
| 2114 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 5367 | 2115 odd->dd_phys->dd_head_dataset_obj, |
| 2199 | 2116 NULL, DS_MODE_NONE, FTAG, &phds)) |
| 2117 goto out; | |
| 2118 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; | |
| 2119 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 2120 } | |
| 2082 | 2121 |
| 2122 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 2123 err = EXDEV; | |
| 2124 goto out; | |
| 2125 } | |
| 2126 | |
| 5367 | 2127 /* find origin's new next ds */ |
| 2082 | 2128 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
| 2129 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 5367 | 2130 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2131 dsl_dataset_t *prev; |
| 2132 | |
| 2133 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 2134 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 2135 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 2136 goto out; |
| 2137 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2138 newnext_ds = prev; | |
| 2139 } | |
| 2199 | 2140 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2141 |
| 5367 | 2142 /* compute origin's new unique space */ |
| 2082 | 2143 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2144 &itor, &bp)) == 0) { | |
| 5367 | 2145 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
| 2199 | 2146 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 2147 } |
| 2148 if (err != ENOENT) | |
| 2149 goto out; | |
| 2150 | |
| 2151 /* Walk the snapshots that we are moving */ | |
| 2152 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 5367 | 2153 ds = origin_ds; |
| 2082 | 2154 /* CONSTCOND */ |
| 2155 while (TRUE) { | |
| 2156 uint64_t val, dlused, dlcomp, dluncomp; | |
| 2157 dsl_dataset_t *prev; | |
| 2158 | |
| 2159 /* Check that the snapshot name does not conflict */ | |
| 2160 dsl_dataset_name(ds, name); | |
| 2161 err = zap_lookup(dd->dd_pool->dp_meta_objset, | |
| 2162 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, | |
| 2163 8, 1, &val); | |
| 2164 if (err != ENOENT) { | |
| 2165 if (err == 0) | |
| 2166 err = EEXIST; | |
| 2167 goto out; | |
| 2168 } | |
| 2169 | |
| 2170 /* | |
| 2171 * compute space to transfer. Each snapshot gave birth to: | |
| 2172 * (my used) - (prev's used) + (deadlist's used) | |
| 2173 */ | |
| 2199 | 2174 pa->used += ds->ds_phys->ds_used_bytes; |
| 2175 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 2176 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2177 |
| 2178 /* If we reach the first snapshot, we're done. */ | |
| 2179 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2180 break; | |
| 2181 | |
| 2182 if (err = bplist_space(&ds->ds_deadlist, | |
| 2183 &dlused, &dlcomp, &dluncomp)) | |
| 2184 goto out; | |
| 2185 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2186 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 2187 FTAG, &prev)) | |
| 2188 goto out; | |
| 2199 | 2189 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 2190 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 2191 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2192 |
| 2193 /* | |
| 2194 * We could be a clone of a clone. If we reach our | |
| 2195 * parent's branch point, we're done. | |
| 2196 */ | |
| 2197 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2198 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 break; | |
| 2200 } | |
| 5367 | 2201 if (ds != origin_ds) |
| 2082 | 2202 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2203 ds = prev; | |
| 2204 } | |
| 2205 | |
| 2206 /* Check that there is enough space here */ | |
| 5367 | 2207 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
| 2199 | 2208 |
| 2209 out: | |
| 5367 | 2210 if (ds && ds != origin_ds) |
| 2199 | 2211 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 5367 | 2212 if (origin_ds) |
| 2213 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2214 if (newnext_ds) |
| 2215 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2216 if (name) | |
| 2217 kmem_free(name, MAXPATHLEN); | |
| 2218 return (err); | |
| 2219 } | |
| 2082 | 2220 |
| 2199 | 2221 static void |
| 4543 | 2222 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2223 { |
| 2224 dsl_dataset_t *hds = arg1; | |
| 2225 struct promotearg *pa = arg2; | |
| 2226 dsl_dir_t *dd = hds->ds_dir; | |
| 2227 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2228 dsl_dir_t *odd = NULL; |
| 2229 dsl_dataset_t *ds, *origin_ds; | |
| 2199 | 2230 char *name; |
| 2231 | |
| 5367 | 2232 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
| 2199 | 2233 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
| 2234 | |
| 5367 | 2235 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2236 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
| 2417 | 2237 /* |
| 5367 | 2238 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2239 * changing. |
| 2240 */ | |
| 5367 | 2241 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2242 NULL, FTAG, &odd)); | |
| 2082 | 2243 |
| 2244 /* move snapshots to this dir */ | |
| 2199 | 2245 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 5367 | 2246 ds = origin_ds; |
| 2082 | 2247 /* CONSTCOND */ |
| 2248 while (TRUE) { | |
| 2249 dsl_dataset_t *prev; | |
| 2250 | |
| 2251 /* move snap name entry */ | |
| 2252 dsl_dataset_name(ds, name); | |
| 2199 | 2253 VERIFY(0 == zap_remove(dp->dp_meta_objset, |
| 2254 pa->snapnames_obj, ds->ds_snapname, tx)); | |
| 2255 VERIFY(0 == zap_add(dp->dp_meta_objset, | |
| 2082 | 2256 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2257 8, 1, &ds->ds_object, tx)); | |
| 2258 | |
| 2259 /* change containing dsl_dir */ | |
| 2260 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2261 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2262 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2263 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2264 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2265 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2266 NULL, ds, &ds->ds_dir)); |
| 2267 | |
| 2268 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 2269 | |
| 2270 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2271 break; | |
| 2272 | |
| 2199 | 2273 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 2274 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 2275 FTAG, &prev)); | |
| 2276 | |
| 2277 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2278 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2279 break; | |
| 2280 } | |
| 5367 | 2281 if (ds != origin_ds) |
| 2082 | 2282 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2283 ds = prev; | |
| 2284 } | |
| 5367 | 2285 if (ds != origin_ds) |
| 2199 | 2286 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2082 | 2287 |
| 5367 | 2288 /* change origin's next snap */ |
| 2289 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
| 2290 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
| 2082 | 2291 |
| 5367 | 2292 /* change origin */ |
| 2082 | 2293 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 2294 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
| 2295 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
| 2296 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
| 2297 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
| 2082 | 2298 |
| 2299 /* change space accounting */ | |
| 5367 | 2300 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2301 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2302 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2303 |
| 4543 | 2304 /* log history record */ |
| 2305 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
| 2306 cr, "dataset = %llu", ds->ds_object); | |
| 2307 | |
| 5367 | 2308 dsl_dir_close(odd, FTAG); |
| 2309 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2310 kmem_free(name, MAXPATHLEN); |
| 2082 | 2311 } |
| 2312 | |
| 2313 int | |
| 2314 dsl_dataset_promote(const char *name) | |
| 2315 { | |
| 2316 dsl_dataset_t *ds; | |
| 2317 int err; | |
| 2318 dmu_object_info_t doi; | |
| 2199 | 2319 struct promotearg pa; |
| 2082 | 2320 |
| 2321 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 2322 if (err) | |
| 2323 return (err); | |
| 2324 | |
| 2325 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 2326 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 2327 if (err) { | |
| 2328 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2329 return (err); | |
| 2330 } | |
| 2331 | |
| 2332 /* | |
| 2333 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 2334 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2335 * bonus buffers. | |
| 2336 */ | |
| 2199 | 2337 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2338 dsl_dataset_promote_check, | |
| 2339 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2340 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2341 return (err); | |
| 2342 } | |
| 3912 | 2343 |
| 5367 | 2344 struct cloneswaparg { |
| 2345 dsl_dataset_t *cds; /* clone dataset */ | |
| 2346 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2347 boolean_t force; | |
|
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2348 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2349 }; |
|
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2350 |
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2351 /* ARGSUSED */ |
|
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2352 static int |
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2353 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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2354 { |
| 5367 | 2355 struct cloneswaparg *csa = arg1; |
|
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2356 |
| 5367 | 2357 /* they should both be heads */ |
| 2358 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2359 dsl_dataset_is_snapshot(csa->ohds)) | |
|
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2360 return (EINVAL); |
|
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2361 |
| 5367 | 2362 /* the branch point should be just before them */ |
| 2363 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
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2364 return (EINVAL); |
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2365 |
| 5367 | 2366 /* cds should be the clone */ |
| 2367 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2368 csa->ohds->ds_object) | |
| 2369 return (EINVAL); | |
|
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2370 |
| 5367 | 2371 /* the clone should be a child of the origin */ |
| 2372 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2373 return (EINVAL); | |
|
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2374 |
| 5367 | 2375 /* ohds shouldn't be modified unless 'force' */ |
| 2376 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2377 return (ETXTBSY); | |
|
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2378 |
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2379 /* adjust amount of any unconsumed refreservation */ |
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2380 csa->unused_refres_delta = |
|
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2381 (int64_t)MIN(csa->ohds->ds_reserved, |
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2382 csa->ohds->ds_phys->ds_unique_bytes) - |
|
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2383 (int64_t)MIN(csa->ohds->ds_reserved, |
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2384 csa->cds->ds_phys->ds_unique_bytes); |
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2385 |
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2386 if (csa->unused_refres_delta > 0 && |
|
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2387 csa->unused_refres_delta > |
|
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2388 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
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2389 return (ENOSPC); |
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2390 |
| 5367 | 2391 return (0); |
|
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2392 } |
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2393 |
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2394 /* ARGSUSED */ |
|
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2395 static void |
|
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2396 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
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2397 { |
| 5367 | 2398 struct cloneswaparg *csa = arg1; |
| 2399 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
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2400 uint64_t itor = 0; |
|
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2401 blkptr_t bp; |
|
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2402 uint64_t unique = 0; |
|
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2403 int err; |
|
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2404 |
|
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2405 ASSERT(csa->cds->ds_reserved == 0); |
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2406 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
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2407 |
| 5367 | 2408 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2409 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2410 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
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2411 |
| 5367 | 2412 if (csa->cds->ds_user_ptr != NULL) { |
| 2413 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2414 csa->cds->ds_user_ptr = NULL; | |
| 2415 } | |
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2416 |
| 5367 | 2417 if (csa->ohds->ds_user_ptr != NULL) { |
| 2418 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2419 csa->ohds->ds_user_ptr); | |
| 2420 csa->ohds->ds_user_ptr = NULL; | |
| 2421 } | |
|
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2422 |
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|
2423 /* compute unique space */ |
| 5367 | 2424 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2425 &itor, &bp)) == 0) { | |
| 2426 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2427 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
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2428 } |
|
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2429 VERIFY(err == ENOENT); |
|
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2430 |
|
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2431 /* reset origin's unique bytes */ |
| 5367 | 2432 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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2433 |
|
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2434 /* swap blkptrs */ |
|
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2435 { |
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2436 blkptr_t tmp; |
| 5367 | 2437 tmp = csa->ohds->ds_phys->ds_bp; |
| 2438 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2439 csa->cds->ds_phys->ds_bp = tmp; | |
|
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2440 } |
|
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2441 |
|
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2442 /* set dd_*_bytes */ |
|
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2443 { |
|
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2444 int64_t dused, dcomp, duncomp; |
|
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2445 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
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2446 uint64_t odl_used, odl_comp, odl_uncomp; |
|
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2447 |
| 5367 | 2448 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
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2449 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2450 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
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2451 &odl_comp, &odl_uncomp)); |
| 5367 | 2452 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2453 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2454 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2455 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2456 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2457 cdl_uncomp - | |
| 2458 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
5326
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5094
diff
changeset
|
2459 |
| 5367 | 2460 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2461 dused, dcomp, duncomp, tx); | |
| 2462 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2463 -dused, -dcomp, -duncomp, tx); | |
| 2464 } | |
| 2465 | |
| 2466 #define SWITCH64(x, y) \ | |
| 2467 { \ | |
| 2468 uint64_t __tmp = (x); \ | |
| 2469 (x) = (y); \ | |
| 2470 (y) = __tmp; \ | |
|
5326
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diff
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|
2471 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2472 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2473 /* swap ds_*_bytes */ |
| 5367 | 2474 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2475 csa->cds->ds_phys->ds_used_bytes); | |
| 2476 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2477 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2478 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2479 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
5481
1364fb7de75d
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5475
diff
changeset
|
2480 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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5475
diff
changeset
|
2481 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
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5475
diff
changeset
|
2482 |
|
1364fb7de75d
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5475
diff
changeset
|
2483 /* apply any parent delta for change in unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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5475
diff
changeset
|
2484 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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5475
diff
changeset
|
2485 0, 0, tx); |
|
5326
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|
2486 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2487 /* swap deadlists */ |
| 5367 | 2488 bplist_close(&csa->cds->ds_deadlist); |
| 2489 bplist_close(&csa->ohds->ds_deadlist); | |
| 2490 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2491 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2492 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2493 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2494 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2495 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5326
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diff
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|
2496 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2497 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2498 /* |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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5475
diff
changeset
|
2499 * Swap 'clone' with its origin head file system. |
|
5326
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5094
diff
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|
2500 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
5094
diff
changeset
|
2501 int |
| 5367 | 2502 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2503 boolean_t force) | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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5094
diff
changeset
|
2504 { |
| 5367 | 2505 struct cloneswaparg csa; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2506 |
| 5367 | 2507 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
| 2508 ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); | |
|
5326
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diff
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|
2509 |
| 5367 | 2510 csa.cds = clone; |
| 2511 csa.ohds = origin_head; | |
| 2512 csa.force = force; | |
| 2513 return (dsl_sync_task_do(clone->ds_dir->dd_pool, | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2514 dsl_dataset_clone_swap_check, |
| 5367 | 2515 dsl_dataset_clone_swap_sync, &csa, NULL, 9)); |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
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5094
diff
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|
2516 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2517 |
| 3912 | 2518 /* |
| 2519 * Given a pool name and a dataset object number in that pool, | |
| 2520 * return the name of that dataset. | |
| 2521 */ | |
| 2522 int | |
| 2523 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2524 { | |
| 2525 spa_t *spa; | |
| 2526 dsl_pool_t *dp; | |
| 2527 dsl_dataset_t *ds = NULL; | |
| 2528 int error; | |
| 2529 | |
| 2530 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2531 return (error); | |
| 2532 dp = spa_get_dsl(spa); | |
| 2533 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2534 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2535 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2536 rw_exit(&dp->dp_config_rwlock); | |
| 2537 spa_close(spa, FTAG); | |
| 2538 return (error); | |
| 2539 } | |
| 2540 dsl_dataset_name(ds, buf); | |
| 2541 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2542 rw_exit(&dp->dp_config_rwlock); | |
| 2543 spa_close(spa, FTAG); | |
| 2544 | |
| 2545 return (0); | |
| 2546 } | |
|
5378
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
2547 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
2548 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2549 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
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|
2550 uint64_t asize, uint64_t inflight, uint64_t *used) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2551 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2552 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2553 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2554 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2555 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2556 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2557 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2558 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2559 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2560 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2561 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
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|
2562 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
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|
2563 *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2564 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2565 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
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|
2566 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2567 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2568 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
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diff
changeset
|
2569 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2570 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2571 * If they are requesting more space, and our current estimate |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2572 * is over quota, they get to try again unless the actual |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2573 * on-disk is over quota and there are no pending changes (which |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2574 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2575 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2576 if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2577 if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2578 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2579 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2580 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2581 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2582 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2583 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2584 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2585 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2586 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2587 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2588 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2589 dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2590 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2591 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2592 uint64_t *quotap = arg2; |
|
111aa1baa84a
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ck153898
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|
2593 uint64_t new_quota = *quotap; |
|
111aa1baa84a
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ck153898
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|
2594 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
2595 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2596 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2597 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2598 if (new_quota == 0) |
|
111aa1baa84a
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ck153898
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diff
changeset
|
2599 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2600 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2601 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
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ck153898
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|
2602 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2603 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2604 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2605 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2606 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2607 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2608 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2609 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2610 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
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diff
changeset
|
2611 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
2612 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2613 uint64_t *quotap = arg2; |
|
111aa1baa84a
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changeset
|
2614 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2615 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2616 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
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ck153898
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diff
changeset
|
2617 |
|
111aa1baa84a
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ck153898
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|
2618 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
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changeset
|
2619 ds->ds_quota = new_quota; |
|
111aa1baa84a
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ck153898
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changeset
|
2620 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2621 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2622 dsl_prop_set_uint64_sync(ds->ds_dir, "refquota", new_quota, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2623 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2624 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
|
2625 tx, cr, "%lld dataset = %llu ", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2626 (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
|
2627 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2628 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2629 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2630 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
|
2631 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2632 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2633 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2634 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2635 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
|
2636 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2637 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2638 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2639 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2640 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2641 * 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
|
2642 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2643 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2644 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2645 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2646 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2647 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2648 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2649 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2650 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2651 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2652 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2653 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2654 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2655 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
|
2656 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2657 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2658 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2659 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2660 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2661 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2662 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2663 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2664 return (EOVERFLOW); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2665 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2666 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
|
2667 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2668 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2669 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2670 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2671 return (EINVAL); |
|
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 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2674 * 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
|
2675 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2676 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2677 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2678 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2679 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2680 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2681 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2682 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
|
2683 mutex_exit(&ds->ds_lock); |
|
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 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2686 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
|
2687 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2688 if (delta > 0 && ds->ds_quota > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2689 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2690 return (ENOSPC); |
|
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 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2693 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2694 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2695 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2696 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2697 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
|
2698 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2699 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2700 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2701 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2702 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2703 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2704 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2705 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2706 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2707 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2708 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2709 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2710 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2711 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2712 ds->ds_reserved = new_reservation; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2713 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2714 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2715 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2716 new_reservation, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2717 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2718 dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); |
|
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 spa_history_internal_log(LOG_DS_REFRESERV, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2721 ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2722 (longlong_t)new_reservation, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2723 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2724 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2725 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2726 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2727 dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2728 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2729 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2730 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2731 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2732 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
|
2733 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2734 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2735 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2736 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2737 dsl_dataset_set_reservation_check, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2738 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2739 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2740 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2741 } |