Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 5481:1364fb7de75d
6619182 new non-sparse zvols should get refreservations
6623412 clone swap needs to check for enough space due to refreservation
6627460 Setting quota to itself should be a successful noop
| author | ck153898 |
|---|---|
| date | Wed, 14 Nov 2007 12:28:57 -0800 |
| parents | e140313199cc |
| children | 85721e07d1fa |
| 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 boolean_t need_lock = |
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379 !RW_LOCK_HELD(&dp->dp_config_rwlock); |
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380 |
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381 if (need_lock) |
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382 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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383 |
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384 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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385 "refreservation", sizeof (uint64_t), 1, |
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386 &ds->ds_reserved, NULL); |
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387 if (err == 0) { |
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388 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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389 "refquota", sizeof (uint64_t), 1, |
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390 &ds->ds_quota, NULL); |
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391 } |
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392 |
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393 if (need_lock) |
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394 rw_exit(&dp->dp_config_rwlock); |
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395 } else { |
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396 ds->ds_reserved = ds->ds_quota = 0; |
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397 } |
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|
398 |
| 1544 | 399 if (err == 0) { |
| 400 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 401 dsl_dataset_evict); | |
| 402 } | |
| 403 if (err || winner) { | |
| 789 | 404 bplist_close(&ds->ds_deadlist); |
| 405 if (ds->ds_prev) { | |
| 406 dsl_dataset_close(ds->ds_prev, | |
| 407 DS_MODE_NONE, ds); | |
| 408 } | |
| 409 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 410 mutex_destroy(&ds->ds_lock); |
| 4787 | 411 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 412 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 789 | 413 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 414 if (err) { |
| 415 dmu_buf_rele(dbuf, tag); | |
| 416 return (err); | |
| 417 } | |
| 789 | 418 ds = winner; |
| 419 } else { | |
| 4787 | 420 ds->ds_fsid_guid = |
| 789 | 421 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 422 } | |
| 423 } | |
| 424 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 425 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 426 | |
| 427 mutex_enter(&ds->ds_lock); | |
| 428 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 429 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 430 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
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431 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 432 mutex_exit(&ds->ds_lock); |
| 433 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 434 return (EBUSY); |
| 789 | 435 } |
| 436 ds->ds_open_refcount += weight; | |
| 437 mutex_exit(&ds->ds_lock); | |
| 438 | |
| 1544 | 439 *dsp = ds; |
| 440 return (0); | |
| 789 | 441 } |
| 442 | |
| 443 int | |
| 444 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 445 void *tag, dsl_dataset_t **dsp) | |
| 446 { | |
| 447 dsl_dir_t *dd; | |
| 448 dsl_pool_t *dp; | |
| 449 const char *tail; | |
| 450 uint64_t obj; | |
| 451 dsl_dataset_t *ds = NULL; | |
| 452 int err = 0; | |
| 453 | |
| 1544 | 454 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 455 if (err) | |
| 456 return (err); | |
| 789 | 457 |
| 458 dp = dd->dd_pool; | |
| 459 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 460 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 461 if (obj == 0) { | |
| 462 /* A dataset with no associated objset */ | |
| 463 err = ENOENT; | |
| 464 goto out; | |
| 465 } | |
| 466 | |
| 467 if (tail != NULL) { | |
| 468 objset_t *mos = dp->dp_meta_objset; | |
| 469 | |
| 1544 | 470 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 471 DS_MODE_NONE, tag, &ds); | |
| 472 if (err) | |
| 473 goto out; | |
| 789 | 474 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 475 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 476 ds = NULL; | |
| 477 | |
| 478 if (tail[0] != '@') { | |
| 479 err = ENOENT; | |
| 480 goto out; | |
| 481 } | |
| 482 tail++; | |
| 483 | |
| 484 /* Look for a snapshot */ | |
| 485 if (!DS_MODE_IS_READONLY(mode)) { | |
| 486 err = EROFS; | |
| 487 goto out; | |
| 488 } | |
| 489 dprintf("looking for snapshot '%s'\n", tail); | |
| 490 err = zap_lookup(mos, obj, tail, 8, 1, &obj); | |
| 491 if (err) | |
| 492 goto out; | |
| 493 } | |
| 1544 | 494 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 495 |
| 496 out: | |
| 497 rw_exit(&dp->dp_config_rwlock); | |
| 498 dsl_dir_close(dd, FTAG); | |
| 499 | |
| 500 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 501 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 502 | |
| 503 *dsp = ds; | |
| 504 return (err); | |
| 505 } | |
| 506 | |
| 507 int | |
| 508 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 509 { | |
| 510 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 511 } | |
| 512 | |
| 513 void | |
| 514 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 515 { | |
| 516 if (ds == NULL) { | |
| 517 (void) strcpy(name, "mos"); | |
| 518 } else { | |
| 519 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 520 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 521 if (ds->ds_snapname[0]) { |
| 522 (void) strcat(name, "@"); | |
| 523 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 524 /* | |
| 525 * We use a "recursive" mutex so that we | |
| 526 * can call dprintf_ds() with ds_lock held. | |
| 527 */ | |
| 528 mutex_enter(&ds->ds_lock); | |
| 529 (void) strcat(name, ds->ds_snapname); | |
| 530 mutex_exit(&ds->ds_lock); | |
| 531 } else { | |
| 532 (void) strcat(name, ds->ds_snapname); | |
| 533 } | |
| 534 } | |
| 535 } | |
| 536 } | |
| 537 | |
|
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538 static int |
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539 dsl_dataset_namelen(dsl_dataset_t *ds) |
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540 { |
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541 int result; |
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542 |
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543 if (ds == NULL) { |
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544 result = 3; /* "mos" */ |
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545 } else { |
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546 result = dsl_dir_namelen(ds->ds_dir); |
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547 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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548 if (ds->ds_snapname[0]) { |
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549 ++result; /* adding one for the @-sign */ |
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550 if (!MUTEX_HELD(&ds->ds_lock)) { |
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551 /* see dsl_datset_name */ |
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552 mutex_enter(&ds->ds_lock); |
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553 result += strlen(ds->ds_snapname); |
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554 mutex_exit(&ds->ds_lock); |
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555 } else { |
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556 result += strlen(ds->ds_snapname); |
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557 } |
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558 } |
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559 } |
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560 |
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561 return (result); |
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562 } |
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563 |
| 789 | 564 void |
| 565 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 566 { | |
| 567 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 568 mutex_enter(&ds->ds_lock); | |
| 569 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 570 ds->ds_open_refcount -= weight; | |
| 571 dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", | |
| 572 mode, ds->ds_open_refcount); | |
| 573 mutex_exit(&ds->ds_lock); | |
| 574 | |
| 1544 | 575 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 576 } |
| 577 | |
| 578 void | |
| 5367 | 579 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
| 580 { | |
| 581 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 582 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 583 mutex_enter(&ds->ds_lock); | |
| 584 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 585 ASSERT3U(oldweight, >=, newweight); | |
| 586 ds->ds_open_refcount -= oldweight; | |
| 587 ds->ds_open_refcount += newweight; | |
| 588 mutex_exit(&ds->ds_lock); | |
| 589 } | |
| 590 | |
| 591 boolean_t | |
| 592 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
| 593 { | |
| 594 boolean_t rv; | |
| 595 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 596 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 597 mutex_enter(&ds->ds_lock); | |
| 598 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 599 ASSERT3U(newweight, >=, oldweight); | |
| 600 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
| 601 rv = B_FALSE; | |
| 602 } else { | |
| 603 ds->ds_open_refcount -= oldweight; | |
| 604 ds->ds_open_refcount += newweight; | |
| 605 rv = B_TRUE; | |
| 606 } | |
| 607 mutex_exit(&ds->ds_lock); | |
| 608 return (rv); | |
| 609 } | |
| 610 | |
| 611 void | |
| 789 | 612 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 613 { | |
| 614 objset_t *mos = dp->dp_meta_objset; | |
| 615 dmu_buf_t *dbuf; | |
| 616 dsl_dataset_phys_t *dsphys; | |
| 617 dsl_dataset_t *ds; | |
| 618 uint64_t dsobj; | |
| 619 dsl_dir_t *dd; | |
| 620 | |
| 621 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 622 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 623 |
|
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624 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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625 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 626 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 627 dmu_buf_will_dirty(dbuf, tx); |
| 628 dsphys = dbuf->db_data; | |
| 629 dsphys->ds_dir_obj = dd->dd_object; | |
| 630 dsphys->ds_fsid_guid = unique_create(); | |
| 631 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 632 sizeof (dsphys->ds_guid)); | |
| 633 dsphys->ds_snapnames_zapobj = | |
|
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634 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 635 dsphys->ds_creation_time = gethrestime_sec(); |
| 636 dsphys->ds_creation_txg = tx->tx_txg; | |
| 637 dsphys->ds_deadlist_obj = | |
| 638 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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639 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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640 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 641 dmu_buf_rele(dbuf, FTAG); |
| 789 | 642 |
| 643 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 644 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 645 dsl_dir_close(dd, FTAG); | |
| 646 | |
| 1544 | 647 VERIFY(0 == |
| 648 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
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649 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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650 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 651 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 652 } | |
| 653 | |
| 2199 | 654 uint64_t |
| 5367 | 655 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, dmu_tx_t *tx) |
| 789 | 656 { |
| 5367 | 657 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 658 dmu_buf_t *dbuf; |
| 659 dsl_dataset_phys_t *dsphys; | |
| 5367 | 660 uint64_t dsobj; |
| 789 | 661 objset_t *mos = dp->dp_meta_objset; |
| 662 | |
| 5367 | 663 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 664 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 665 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 666 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 667 |
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668 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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669 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 670 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 671 dmu_buf_will_dirty(dbuf, tx); |
| 672 dsphys = dbuf->db_data; | |
| 673 dsphys->ds_dir_obj = dd->dd_object; | |
| 674 dsphys->ds_fsid_guid = unique_create(); | |
| 675 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 676 sizeof (dsphys->ds_guid)); | |
| 677 dsphys->ds_snapnames_zapobj = | |
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678 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 679 dsphys->ds_creation_time = gethrestime_sec(); |
| 680 dsphys->ds_creation_txg = tx->tx_txg; | |
| 681 dsphys->ds_deadlist_obj = | |
| 682 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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683 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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684 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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685 |
| 5367 | 686 if (origin) { |
| 687 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 688 dsphys->ds_prev_snap_txg = |
| 5367 | 689 origin->ds_phys->ds_creation_txg; |
| 789 | 690 dsphys->ds_used_bytes = |
| 5367 | 691 origin->ds_phys->ds_used_bytes; |
| 789 | 692 dsphys->ds_compressed_bytes = |
| 5367 | 693 origin->ds_phys->ds_compressed_bytes; |
| 789 | 694 dsphys->ds_uncompressed_bytes = |
| 5367 | 695 origin->ds_phys->ds_uncompressed_bytes; |
| 696 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
| 789 | 697 |
| 5367 | 698 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 699 origin->ds_phys->ds_num_children++; | |
| 789 | 700 |
| 701 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 702 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 703 } |
| 1544 | 704 dmu_buf_rele(dbuf, FTAG); |
| 789 | 705 |
| 706 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 707 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 708 |
| 709 return (dsobj); | |
| 710 } | |
| 711 | |
| 712 uint64_t | |
| 713 dsl_dataset_create_sync(dsl_dir_t *pdd, | |
| 714 const char *lastname, dsl_dataset_t *origin, cred_t *cr, dmu_tx_t *tx) | |
| 715 { | |
| 716 dsl_pool_t *dp = pdd->dd_pool; | |
| 717 uint64_t dsobj, ddobj; | |
| 718 dsl_dir_t *dd; | |
| 719 | |
| 720 ASSERT(lastname[0] != '@'); | |
| 721 | |
| 722 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 723 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 724 | |
| 725 dsobj = dsl_dataset_create_sync_impl(dd, origin, tx); | |
| 726 | |
| 727 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 728 | |
| 789 | 729 dsl_dir_close(dd, FTAG); |
| 730 | |
| 2199 | 731 return (dsobj); |
| 732 } | |
| 733 | |
| 734 struct destroyarg { | |
| 735 dsl_sync_task_group_t *dstg; | |
| 736 char *snapname; | |
| 737 char *failed; | |
| 738 }; | |
| 739 | |
| 740 static int | |
| 741 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 742 { | |
| 743 struct destroyarg *da = arg; | |
| 744 dsl_dataset_t *ds; | |
| 745 char *cp; | |
| 746 int err; | |
| 747 | |
| 748 (void) strcat(name, "@"); | |
| 749 (void) strcat(name, da->snapname); | |
| 750 err = dsl_dataset_open(name, | |
| 751 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 752 da->dstg, &ds); |
| 2199 | 753 cp = strchr(name, '@'); |
| 754 *cp = '\0'; | |
| 755 if (err == ENOENT) | |
| 756 return (0); | |
| 757 if (err) { | |
| 758 (void) strcpy(da->failed, name); | |
| 759 return (err); | |
| 760 } | |
| 761 | |
| 762 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 763 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 764 return (0); |
| 765 } | |
| 766 | |
| 2199 | 767 /* |
| 768 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 769 */ | |
| 770 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 771 int | |
| 772 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 773 { | |
| 774 int err; | |
| 775 struct destroyarg da; | |
| 776 dsl_sync_task_t *dst; | |
| 777 spa_t *spa; | |
| 778 | |
|
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779 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 780 if (err) |
| 781 return (err); | |
| 782 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 783 da.snapname = snapname; | |
| 784 da.failed = fsname; | |
| 785 | |
| 786 err = dmu_objset_find(fsname, | |
| 2417 | 787 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 788 |
| 789 if (err == 0) | |
| 790 err = dsl_sync_task_group_wait(da.dstg); | |
| 791 | |
| 792 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 793 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 794 dsl_dataset_t *ds = dst->dst_arg1; | |
| 795 if (dst->dst_err) { | |
| 796 dsl_dataset_name(ds, fsname); | |
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797 *strchr(fsname, '@') = '\0'; |
| 2199 | 798 } |
| 799 /* | |
| 800 * If it was successful, destroy_sync would have | |
| 801 * closed the ds | |
| 802 */ | |
| 803 if (err) | |
| 4007 | 804 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 805 } |
| 806 | |
| 807 dsl_sync_task_group_destroy(da.dstg); | |
| 808 spa_close(spa, FTAG); | |
| 809 return (err); | |
| 810 } | |
| 811 | |
| 5367 | 812 /* |
| 813 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
| 814 * successful or not), ds will be closed and caller can no longer | |
| 815 * dereference it. | |
| 816 */ | |
| 789 | 817 int |
| 5367 | 818 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 819 { |
| 820 int err; | |
| 2199 | 821 dsl_sync_task_group_t *dstg; |
| 822 objset_t *os; | |
| 789 | 823 dsl_dir_t *dd; |
| 2199 | 824 uint64_t obj; |
| 825 | |
| 5367 | 826 if (ds->ds_open_refcount != DS_REF_MAX) { |
| 827 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
| 828 DS_MODE_EXCLUSIVE) == 0) { | |
| 829 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
| 830 return (EBUSY); | |
| 831 } | |
| 832 } | |
| 833 | |
| 834 if (dsl_dataset_is_snapshot(ds)) { | |
| 2199 | 835 /* Destroying a snapshot is simpler */ |
| 836 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 837 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 838 ds, tag, 0); |
| 839 goto out; | |
| 2199 | 840 } |
| 841 | |
| 842 dd = ds->ds_dir; | |
| 789 | 843 |
| 2199 | 844 /* |
| 845 * Check for errors and mark this ds as inconsistent, in | |
| 846 * case we crash while freeing the objects. | |
| 847 */ | |
| 848 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 849 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 850 if (err) |
| 851 goto out; | |
| 852 | |
| 853 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 854 if (err) | |
| 855 goto out; | |
| 2199 | 856 |
| 857 /* | |
| 858 * remove the objects in open context, so that we won't | |
| 859 * have too much to do in syncing context. | |
| 860 */ | |
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861 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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862 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 863 dmu_tx_t *tx = dmu_tx_create(os); |
| 864 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 865 dmu_tx_hold_bonus(tx, obj); | |
| 866 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 867 if (err) { | |
| 868 /* | |
| 869 * Perhaps there is not enough disk | |
| 870 * space. Just deal with it from | |
| 871 * dsl_dataset_destroy_sync(). | |
| 872 */ | |
| 873 dmu_tx_abort(tx); | |
| 874 continue; | |
| 875 } | |
| 876 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 877 dmu_tx_commit(tx); | |
| 878 } | |
| 879 /* Make sure it's not dirty before we finish destroying it. */ | |
| 880 txg_wait_synced(dd->dd_pool, 0); | |
| 881 | |
| 882 dmu_objset_close(os); | |
| 883 if (err != ESRCH) | |
| 5367 | 884 goto out; |
| 2199 | 885 |
| 5367 | 886 if (ds->ds_user_ptr) { |
| 887 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 888 ds->ds_user_ptr = NULL; | |
| 889 } | |
| 890 | |
| 891 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 892 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 893 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 894 | |
| 1544 | 895 if (err) |
| 5367 | 896 goto out; |
| 789 | 897 |
| 2199 | 898 /* |
| 899 * Blow away the dsl_dir + head dataset. | |
| 900 */ | |
| 901 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 902 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 903 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 904 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 905 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 906 err = dsl_sync_task_group_wait(dstg); | |
| 907 dsl_sync_task_group_destroy(dstg); | |
| 908 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 5367 | 909 if (err) |
| 2199 | 910 dsl_dir_close(dd, FTAG); |
| 5367 | 911 out: |
| 912 if (err) | |
| 913 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
| 789 | 914 return (err); |
| 915 } | |
| 916 | |
| 917 int | |
| 5367 | 918 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 919 { |
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920 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 5367 | 921 |
| 2199 | 922 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 923 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 924 ds, &ost, 0)); |
| 789 | 925 } |
| 926 | |
| 927 void * | |
| 928 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 929 void *p, dsl_dataset_evict_func_t func) | |
| 930 { | |
| 931 void *old; | |
| 932 | |
| 933 mutex_enter(&ds->ds_lock); | |
| 934 old = ds->ds_user_ptr; | |
| 935 if (old == NULL) { | |
| 936 ds->ds_user_ptr = p; | |
| 937 ds->ds_user_evict_func = func; | |
| 938 } | |
| 939 mutex_exit(&ds->ds_lock); | |
| 940 return (old); | |
| 941 } | |
| 942 | |
| 943 void * | |
| 944 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 945 { | |
| 946 return (ds->ds_user_ptr); | |
| 947 } | |
| 948 | |
| 949 | |
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950 blkptr_t * |
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951 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 952 { |
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953 return (&ds->ds_phys->ds_bp); |
| 789 | 954 } |
| 955 | |
| 956 void | |
| 957 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 958 { | |
| 959 ASSERT(dmu_tx_is_syncing(tx)); | |
| 960 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 961 if (ds == NULL) { | |
| 962 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 963 } else { | |
| 964 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 965 ds->ds_phys->ds_bp = *bp; | |
| 966 } | |
| 967 } | |
| 968 | |
| 969 spa_t * | |
| 970 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 971 { | |
| 972 return (ds->ds_dir->dd_pool->dp_spa); | |
| 973 } | |
| 974 | |
| 975 void | |
| 976 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 977 { | |
| 978 dsl_pool_t *dp; | |
| 979 | |
| 980 if (ds == NULL) /* this is the meta-objset */ | |
| 981 return; | |
| 982 | |
| 983 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 984 |
| 985 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 986 panic("dirtying snapshot!"); | |
| 789 | 987 |
| 988 dp = ds->ds_dir->dd_pool; | |
| 989 | |
| 990 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 991 /* up the hold count until we can be written out */ | |
| 992 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 993 } | |
| 994 } | |
| 995 | |
|
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996 /* |
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997 * The unique space in the head dataset can be calculated by subtracting |
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998 * the space used in the most recent snapshot, that is still being used |
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999 * in this file system, from the space currently in use. To figure out |
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1000 * the space in the most recent snapshot still in use, we need to take |
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1001 * the total space used in the snapshot and subtract out the space that |
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1002 * has been freed up since the snapshot was taken. |
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1003 */ |
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1004 static void |
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1005 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1006 { |
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1007 uint64_t mrs_used; |
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1008 uint64_t dlused, dlcomp, dluncomp; |
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1009 |
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1010 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1011 |
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1012 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1013 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1014 else |
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1015 mrs_used = 0; |
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1016 |
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1017 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1018 &dluncomp)); |
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1019 |
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1020 ASSERT3U(dlused, <=, mrs_used); |
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1021 ds->ds_phys->ds_unique_bytes = |
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1022 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1023 |
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1024 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1025 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1026 SPA_VERSION_UNIQUE_ACCURATE) |
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1027 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1028 } |
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1029 |
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1030 static uint64_t |
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1031 dsl_dataset_unique(dsl_dataset_t *ds) |
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1032 { |
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1033 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1034 dsl_dataset_recalc_head_uniq(ds); |
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1035 |
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1036 return (ds->ds_phys->ds_unique_bytes); |
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1037 } |
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1038 |
| 789 | 1039 struct killarg { |
|
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1040 int64_t *usedp; |
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1041 int64_t *compressedp; |
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1042 int64_t *uncompressedp; |
| 789 | 1043 zio_t *zio; |
| 1044 dmu_tx_t *tx; | |
| 1045 }; | |
| 1046 | |
| 1047 static int | |
| 1048 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1049 { | |
| 1050 struct killarg *ka = arg; | |
| 1051 blkptr_t *bp = &bc->bc_blkptr; | |
| 1052 | |
| 1053 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1054 | |
| 1055 /* | |
| 1056 * Since this callback is not called concurrently, no lock is | |
| 1057 * needed on the accounting values. | |
| 1058 */ | |
| 2082 | 1059 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1060 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1061 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1062 /* XXX check for EIO? */ | |
| 1063 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1064 ARC_NOWAIT); | |
| 1065 return (0); | |
| 1066 } | |
| 1067 | |
| 1068 /* ARGSUSED */ | |
| 2199 | 1069 static int |
| 1070 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1071 { |
| 2199 | 1072 dsl_dataset_t *ds = arg1; |
| 5367 | 1073 dmu_objset_type_t *ost = arg2; |
| 789 | 1074 |
| 2199 | 1075 /* |
| 5367 | 1076 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1077 */ |
| 5367 | 1078 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1079 return (EINVAL); |
| 1080 | |
| 2199 | 1081 /* |
| 1082 * This must not be a snapshot. | |
| 1083 */ | |
| 1084 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1085 return (EINVAL); | |
| 789 | 1086 |
| 1087 /* | |
| 1088 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1089 * them. Try again. | |
| 1090 */ | |
| 2199 | 1091 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1092 return (EAGAIN); |
| 2199 | 1093 |
| 1094 return (0); | |
| 1095 } | |
| 789 | 1096 |
| 2199 | 1097 /* ARGSUSED */ |
| 1098 static void | |
| 4543 | 1099 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1100 { |
| 1101 dsl_dataset_t *ds = arg1; | |
| 5367 | 1102 dmu_objset_type_t *ost = arg2; |
| 2199 | 1103 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1104 |
| 1105 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1106 | |
|
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1107 /* |
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1108 * Before the roll back destroy the zil. |
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1109 */ |
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1110 if (ds->ds_user_ptr != NULL) { |
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1111 zil_rollback_destroy( |
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1112 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1113 |
| 1114 /* | |
| 1115 * We need to make sure that the objset_impl_t is reopened after | |
| 1116 * we do the rollback, otherwise it will have the wrong | |
| 1117 * objset_phys_t. Normally this would happen when this | |
| 1118 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
| 1119 * dataset to be immediately evicted. But when doing "zfs recv | |
| 1120 * -F", we reopen the objset before that, so that there is no | |
| 1121 * window where the dataset is closed and inconsistent. | |
| 1122 */ | |
| 1123 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1124 ds->ds_user_ptr = NULL; | |
|
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1125 } |
|
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1126 |
| 789 | 1127 /* Zero out the deadlist. */ |
| 1128 bplist_close(&ds->ds_deadlist); | |
| 1129 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1130 ds->ds_phys->ds_deadlist_obj = | |
| 1131 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1132 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1133 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1134 |
| 1135 { | |
| 1136 /* Free blkptrs that we gave birth to */ | |
| 1137 zio_t *zio; | |
|
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1138 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1139 struct killarg ka; |
| 1140 | |
| 1141 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1142 ZIO_FLAG_MUSTSUCCEED); | |
| 1143 ka.usedp = &used; | |
| 1144 ka.compressedp = &compressed; | |
| 1145 ka.uncompressedp = &uncompressed; | |
| 1146 ka.zio = zio; | |
| 1147 ka.tx = tx; | |
| 1148 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1149 ADVANCE_POST, kill_blkptr, &ka); | |
| 1150 (void) zio_wait(zio); | |
| 1151 | |
| 2199 | 1152 dsl_dir_diduse_space(ds->ds_dir, |
| 789 | 1153 -used, -compressed, -uncompressed, tx); |
| 1154 } | |
| 1155 | |
| 5367 | 1156 if (ds->ds_prev) { |
| 1157 /* Change our contents to that of the prev snapshot */ | |
| 1158 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1159 ds->ds_phys->ds_prev_snap_obj); | |
| 1160 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1161 ds->ds_phys->ds_used_bytes = | |
| 1162 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1163 ds->ds_phys->ds_compressed_bytes = | |
| 1164 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1165 ds->ds_phys->ds_uncompressed_bytes = | |
| 1166 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1167 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1168 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1169 |
| 5367 | 1170 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1171 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1172 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1173 } | |
| 1174 } else { | |
| 1175 /* Zero out our contents, recreate objset */ | |
| 1176 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1177 ds->ds_phys->ds_used_bytes = 0; | |
| 1178 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1179 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1180 ds->ds_phys->ds_flags = 0; | |
| 1181 ds->ds_phys->ds_unique_bytes = 0; | |
| 1182 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1183 &ds->ds_phys->ds_bp, *ost, tx); | |
|
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1184 } |
| 4543 | 1185 |
| 1186 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1187 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1188 } |
| 1189 | |
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1190 /* ARGSUSED */ |
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1191 static int |
| 2199 | 1192 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1193 { |
| 2199 | 1194 dsl_dataset_t *ds = arg1; |
| 5367 | 1195 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1196 uint64_t count; | |
| 1197 int err; | |
|
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1198 |
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1199 /* |
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1200 * Can't delete a head dataset if there are snapshots of it. |
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1201 * (Except if the only snapshots are from the branch we cloned |
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1202 * from.) |
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1203 */ |
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1204 if (ds->ds_prev != NULL && |
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1205 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
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1206 return (EINVAL); |
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1207 |
| 5367 | 1208 /* |
| 1209 * This is really a dsl_dir thing, but check it here so that | |
| 1210 * we'll be less likely to leave this dataset inconsistent & | |
| 1211 * nearly destroyed. | |
| 1212 */ | |
| 1213 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1214 if (err) | |
| 1215 return (err); | |
| 1216 if (count != 0) | |
| 1217 return (EEXIST); | |
| 1218 | |
|
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1219 return (0); |
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1220 } |
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1221 |
| 2199 | 1222 /* ARGSUSED */ |
| 1223 static void | |
| 4543 | 1224 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1225 { |
| 2199 | 1226 dsl_dataset_t *ds = arg1; |
| 4543 | 1227 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1228 |
| 2199 | 1229 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1230 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1231 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1232 |
| 1233 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1234 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1235 } |
| 789 | 1236 |
| 2199 | 1237 /* ARGSUSED */ |
| 5367 | 1238 int |
| 2199 | 1239 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1240 { | |
| 1241 dsl_dataset_t *ds = arg1; | |
| 789 | 1242 |
| 1243 /* Can't delete a branch point. */ | |
| 2199 | 1244 if (ds->ds_phys->ds_num_children > 1) |
| 1245 return (EEXIST); | |
| 789 | 1246 |
| 1247 /* | |
| 1248 * Can't delete a head dataset if there are snapshots of it. | |
| 1249 * (Except if the only snapshots are from the branch we cloned | |
| 1250 * from.) | |
| 1251 */ | |
| 1252 if (ds->ds_prev != NULL && | |
| 2199 | 1253 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1254 return (EINVAL); |
| 1255 | |
| 1256 /* | |
| 1257 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1258 * them. Try again. | |
| 1259 */ | |
| 2199 | 1260 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1261 return (EAGAIN); |
| 2199 | 1262 |
| 1263 /* XXX we should do some i/o error checking... */ | |
| 1264 return (0); | |
| 1265 } | |
| 1266 | |
| 5367 | 1267 void |
| 4543 | 1268 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1269 { |
| 1270 dsl_dataset_t *ds = arg1; | |
|
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1271 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1272 zio_t *zio; |
| 1273 int err; | |
| 1274 int after_branch_point = FALSE; | |
| 1275 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1276 objset_t *mos = dp->dp_meta_objset; | |
| 1277 dsl_dataset_t *ds_prev = NULL; | |
| 1278 uint64_t obj; | |
| 1279 | |
|
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1280 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1281 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1282 ASSERT(ds->ds_prev == NULL || | |
| 1283 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1284 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1285 | |
|
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1286 /* Remove our reservation */ |
|
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1287 if (ds->ds_reserved != 0) { |
|
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1288 uint64_t val = 0; |
|
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1289 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
|
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1290 ASSERT3U(ds->ds_reserved, ==, 0); |
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1291 } |
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1292 |
| 2199 | 1293 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1294 | |
| 1295 obj = ds->ds_object; | |
| 789 | 1296 |
| 1297 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1298 if (ds->ds_prev) { | |
| 1299 ds_prev = ds->ds_prev; | |
| 1300 } else { | |
| 2199 | 1301 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1302 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1303 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1304 } |
| 1305 after_branch_point = | |
| 1306 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1307 | |
| 1308 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1309 if (after_branch_point && | |
| 1310 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1311 /* This clone is toast. */ | |
| 1312 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1313 ds_prev->ds_phys->ds_num_children--; | |
| 1314 } else if (!after_branch_point) { | |
| 1315 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1316 ds->ds_phys->ds_next_snap_obj; | |
| 1317 } | |
| 1318 } | |
| 1319 | |
| 1320 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1321 | |
| 1322 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1323 blkptr_t bp; |
| 789 | 1324 dsl_dataset_t *ds_next; |
| 1325 uint64_t itor = 0; | |
|
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1326 uint64_t old_unique; |
| 789 | 1327 |
| 1328 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1329 | |
| 2199 | 1330 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1331 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1332 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1333 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1334 | |
|
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1335 old_unique = dsl_dataset_unique(ds_next); |
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1336 |
| 789 | 1337 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1338 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1339 ds->ds_phys->ds_prev_snap_obj; | |
| 1340 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1341 ds->ds_phys->ds_prev_snap_txg; | |
| 1342 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1343 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1344 | |
| 1345 /* | |
| 1346 * Transfer to our deadlist (which will become next's | |
| 1347 * new deadlist) any entries from next's current | |
| 1348 * deadlist which were born before prev, and free the | |
| 1349 * other entries. | |
| 1350 * | |
| 1351 * XXX we're doing this long task with the config lock held | |
| 1352 */ | |
| 1353 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1354 &bp) == 0) { | |
| 1355 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1356 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1357 &bp, tx)); | |
| 789 | 1358 if (ds_prev && !after_branch_point && |
| 1359 bp.blk_birth > | |
| 1360 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1361 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1362 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1363 } |
| 1364 } else { | |
| 2082 | 1365 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1366 compressed += BP_GET_PSIZE(&bp); |
| 1367 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1368 /* XXX check return value? */ | |
| 1369 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1370 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1371 } | |
| 1372 } | |
| 1373 | |
| 1374 /* free next's deadlist */ | |
| 1375 bplist_close(&ds_next->ds_deadlist); | |
| 1376 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1377 | |
| 1378 /* set next's deadlist to our deadlist */ | |
| 1379 ds_next->ds_phys->ds_deadlist_obj = | |
| 1380 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1381 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1382 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1383 ds->ds_phys->ds_deadlist_obj = 0; |
| 1384 | |
| 1385 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1386 /* | |
| 1387 * Update next's unique to include blocks which | |
| 1388 * were previously shared by only this snapshot | |
| 1389 * and it. Those blocks will be born after the | |
| 1390 * prev snap and before this snap, and will have | |
| 1391 * died after the next snap and before the one | |
| 1392 * after that (ie. be on the snap after next's | |
| 1393 * deadlist). | |
| 1394 * | |
| 1395 * XXX we're doing this long task with the | |
| 1396 * config lock held | |
| 1397 */ | |
| 1398 dsl_dataset_t *ds_after_next; | |
| 1399 | |
| 2199 | 1400 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1401 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1402 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1403 itor = 0; |
| 1404 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1405 &itor, &bp) == 0) { | |
| 1406 if (bp.blk_birth > | |
| 1407 ds->ds_phys->ds_prev_snap_txg && | |
| 1408 bp.blk_birth <= | |
| 1409 ds->ds_phys->ds_creation_txg) { | |
| 1410 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1411 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1412 } |
| 1413 } | |
| 1414 | |
| 1415 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1416 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1417 } else { | |
| 1418 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1419 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1420 ds_next); | |
| 1421 if (ds_prev) { | |
| 2199 | 1422 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1423 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1424 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1425 } else { |
| 1426 ds_next->ds_prev = NULL; | |
| 1427 } | |
|
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1428 |
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1429 dsl_dataset_recalc_head_uniq(ds_next); |
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1430 |
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1431 /* |
|
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1432 * Reduce the amount of our unconsmed refreservation |
|
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1433 * being charged to our parent by the amount of |
|
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1434 * new unique data we have gained. |
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1435 */ |
|
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1436 if (old_unique < ds_next->ds_reserved) { |
|
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1437 int64_t mrsdelta; |
|
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1438 uint64_t new_unique = |
|
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1439 ds_next->ds_phys->ds_unique_bytes; |
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1440 |
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1441 ASSERT(old_unique <= new_unique); |
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1442 mrsdelta = MIN(new_unique - old_unique, |
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1443 ds_next->ds_reserved - old_unique); |
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1444 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
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1445 0, 0, tx); |
|
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1446 } |
| 789 | 1447 } |
| 1448 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1449 | |
| 1450 /* | |
|
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1451 * NB: unique_bytes might not be accurate for the head objset. |
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1452 * Before SPA_VERSION 9, we didn't update its value when we |
|
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1453 * deleted the most recent snapshot. |
| 789 | 1454 */ |
| 1455 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1456 } else { | |
| 1457 /* | |
| 1458 * There's no next snapshot, so this is a head dataset. | |
| 1459 * Destroy the deadlist. Unless it's a clone, the | |
| 1460 * deadlist should be empty. (If it's a clone, it's | |
| 1461 * safe to ignore the deadlist contents.) | |
| 1462 */ | |
| 1463 struct killarg ka; | |
| 1464 | |
| 1465 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1466 bplist_close(&ds->ds_deadlist); | |
| 1467 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1468 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1469 | |
| 1470 /* | |
| 1471 * Free everything that we point to (that's born after | |
| 1472 * the previous snapshot, if we are a clone) | |
| 1473 * | |
| 1474 * XXX we're doing this long task with the config lock held | |
| 1475 */ | |
| 1476 ka.usedp = &used; | |
| 1477 ka.compressedp = &compressed; | |
| 1478 ka.uncompressedp = &uncompressed; | |
| 1479 ka.zio = zio; | |
| 1480 ka.tx = tx; | |
| 1481 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1482 ADVANCE_POST, kill_blkptr, &ka); | |
| 1483 ASSERT3U(err, ==, 0); | |
|
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1484 ASSERT(spa_version(dp->dp_spa) < |
|
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1485 SPA_VERSION_UNIQUE_ACCURATE || |
|
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1486 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1487 } |
| 1488 | |
| 1489 err = zio_wait(zio); | |
| 1490 ASSERT3U(err, ==, 0); | |
| 1491 | |
| 2199 | 1492 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1493 |
| 1494 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1495 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1496 ASSERT(err == 0); | |
| 1497 } | |
| 1498 | |
| 2199 | 1499 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1500 /* Erase the link in the dataset */ |
| 2199 | 1501 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1502 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1503 /* |
| 1504 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1505 * the dataset. | |
| 1506 */ | |
| 1507 } else { | |
| 1508 /* remove from snapshot namespace */ | |
| 1509 dsl_dataset_t *ds_head; | |
| 2199 | 1510 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1511 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1512 DS_MODE_NONE, FTAG, &ds_head)); |
|
2207
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|
1513 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1514 #ifdef ZFS_DEBUG |
| 1515 { | |
| 1516 uint64_t val; | |
| 1517 err = zap_lookup(mos, | |
| 1518 ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1519 ds->ds_snapname, 8, 1, &val); |
| 789 | 1520 ASSERT3U(err, ==, 0); |
| 1521 ASSERT3U(val, ==, obj); | |
| 1522 } | |
| 1523 #endif | |
| 1524 err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1525 ds->ds_snapname, tx); |
| 789 | 1526 ASSERT(err == 0); |
| 1527 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1528 } | |
| 1529 | |
| 1530 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1531 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1532 | |
| 5094 | 1533 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1534 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1535 cr, "dataset = %llu", ds->ds_object); | |
| 1536 | |
| 2199 | 1537 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1538 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1539 |
| 2199 | 1540 } |
| 1541 | |
|
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1542 static int |
|
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1543 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
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1544 { |
|
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1545 uint64_t asize; |
|
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1546 |
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1547 if (!dmu_tx_is_syncing(tx)) |
|
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1548 return (0); |
|
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1549 |
|
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1550 /* |
|
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1551 * If there's an fs-only reservation, any blocks that might become |
|
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1552 * owned by the snapshot dataset must be accommodated by space |
|
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1553 * outside of the reservation. |
|
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1554 */ |
|
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1555 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1556 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
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1557 return (ENOSPC); |
|
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1558 |
|
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1559 /* |
|
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1560 * Propogate any reserved space for this snapshot to other |
|
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1561 * snapshot checks in this sync group. |
|
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1562 */ |
|
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1563 if (asize > 0) |
|
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1564 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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1565 |
|
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1566 return (0); |
|
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1567 } |
|
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1568 |
| 2199 | 1569 /* ARGSUSED */ |
| 1570 int | |
| 1571 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1572 { | |
| 5367 | 1573 dsl_dataset_t *ds = arg1; |
| 2199 | 1574 const char *snapname = arg2; |
| 1575 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1576 int err; | |
| 1577 uint64_t value; | |
| 789 | 1578 |
| 1579 /* | |
| 2199 | 1580 * We don't allow multiple snapshots of the same txg. If there |
| 1581 * is already one, try again. | |
| 1582 */ | |
| 1583 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1584 return (EAGAIN); | |
| 1585 | |
| 1586 /* | |
| 1587 * Check for conflicting name snapshot name. | |
| 789 | 1588 */ |
| 2199 | 1589 err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, |
| 1590 snapname, 8, 1, &value); | |
| 1591 if (err == 0) | |
| 1592 return (EEXIST); | |
| 1593 if (err != ENOENT) | |
| 1594 return (err); | |
| 789 | 1595 |
|
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1596 /* |
|
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1597 * Check that the dataset's name is not too long. Name consists |
|
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1598 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
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1599 */ |
|
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1600 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
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1601 return (ENAMETOOLONG); |
|
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1602 |
|
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1603 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
|
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1604 if (err) |
|
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1605 return (err); |
|
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1606 |
| 2199 | 1607 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1608 return (0); |
| 1609 } | |
| 1610 | |
| 2199 | 1611 void |
| 4543 | 1612 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1613 { |
| 5367 | 1614 dsl_dataset_t *ds = arg1; |
| 2199 | 1615 const char *snapname = arg2; |
| 1616 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1617 dmu_buf_t *dbuf; |
| 1618 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1619 uint64_t dsobj; |
| 789 | 1620 objset_t *mos = dp->dp_meta_objset; |
| 1621 int err; | |
| 1622 | |
| 1623 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1624 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1625 |
|
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1626 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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1627 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1628 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1629 dmu_buf_will_dirty(dbuf, tx); |
| 1630 dsphys = dbuf->db_data; | |
| 2199 | 1631 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1632 dsphys->ds_fsid_guid = unique_create(); |
| 1633 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1634 sizeof (dsphys->ds_guid)); | |
| 1635 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1636 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1637 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1638 dsphys->ds_num_children = 1; | |
| 1639 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1640 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1641 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1642 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1643 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1644 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1645 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1646 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1647 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1648 |
| 2199 | 1649 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1650 if (ds->ds_prev) { | |
| 1651 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1652 ds->ds_object || |
| 2199 | 1653 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1654 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1655 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1656 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1657 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1658 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1659 } |
| 1660 } | |
| 1661 | |
|
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1662 /* |
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1663 * If we have a reference-reservation on this dataset, we will |
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1664 * need to increase the amount of refreservation being charged |
|
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1665 * since our unique space is going to zero. |
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1666 */ |
|
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1667 if (ds->ds_reserved) { |
|
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1668 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1669 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
|
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1670 } |
|
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1671 |
| 789 | 1672 bplist_close(&ds->ds_deadlist); |
| 1673 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1674 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, dsphys->ds_creation_txg); | |
| 1675 ds->ds_phys->ds_prev_snap_obj = dsobj; | |
| 1676 ds->ds_phys->ds_prev_snap_txg = dsphys->ds_creation_txg; | |
| 1677 ds->ds_phys->ds_unique_bytes = 0; | |
|
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1678 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
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1679 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1680 ds->ds_phys->ds_deadlist_obj = |
| 1681 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1682 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1683 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1684 |
| 1685 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1686 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1687 snapname, 8, 1, &dsobj, tx); | |
| 1688 ASSERT(err == 0); | |
| 1689 | |
| 1690 if (ds->ds_prev) | |
| 1691 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1692 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1693 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1694 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 4543 | 1695 |
| 1696 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
|
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|
1697 "dataset = %llu", dsobj); |
| 789 | 1698 } |
| 1699 | |
| 1700 void | |
|
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1701 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1702 { |
| 1703 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1704 ASSERT(ds->ds_user_ptr != NULL); | |
| 1705 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1706 | |
| 4787 | 1707 /* |
| 1708 * in case we had to change ds_fsid_guid when we opened it, | |
| 1709 * sync it out now. | |
| 1710 */ | |
| 1711 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1712 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1713 | |
| 789 | 1714 dsl_dir_dirty(ds->ds_dir, tx); |
|
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1715 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1716 } |
| 1717 | |
| 1718 void | |
| 2885 | 1719 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1720 { |
|
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1721 uint64_t refd, avail, uobjs, aobjs; |
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1722 |
| 2885 | 1723 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1724 |
|
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1725 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
|
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1726 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
|
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1727 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
|
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1728 |
| 2885 | 1729 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1730 ds->ds_phys->ds_creation_time); | |
| 1731 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1732 ds->ds_phys->ds_creation_txg); | |
|
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1733 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
|
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1734 ds->ds_quota); |
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1735 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
|
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1736 ds->ds_reserved); |
| 789 | 1737 |
| 1738 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1739 /* | |
| 1740 * This is a snapshot; override the dd's space used with | |
| 2885 | 1741 * our unique space and compression ratio. |
| 789 | 1742 */ |
| 2885 | 1743 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1744 ds->ds_phys->ds_unique_bytes); | |
| 1745 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1746 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1747 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1748 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1749 } |
| 1750 } | |
| 1751 | |
| 2885 | 1752 void |
| 1753 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1754 { |
| 2885 | 1755 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1756 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1757 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1758 if (ds->ds_phys->ds_next_snap_obj) { |
| 1759 stat->dds_is_snapshot = B_TRUE; | |
| 1760 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1761 } | |
| 1762 | |
| 1763 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1764 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1765 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1766 dsl_dataset_t *ods; |
| 1767 | |
| 1768 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 5367 | 1769 ds->ds_dir->dd_phys->dd_origin_obj, |
| 2885 | 1770 NULL, DS_MODE_NONE, FTAG, &ods)); |
| 5367 | 1771 dsl_dataset_name(ods, stat->dds_origin); |
| 2885 | 1772 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
| 1773 } | |
| 5446 | 1774 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1775 } |
| 1776 | |
| 1777 uint64_t | |
| 1778 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1779 { | |
| 4787 | 1780 return (ds->ds_fsid_guid); |
| 2885 | 1781 } |
| 1782 | |
| 1783 void | |
| 1784 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1785 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1786 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1787 { | |
| 1788 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1789 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
|
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1790 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1791 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1792 if (ds->ds_quota != 0) { |
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1793 /* |
|
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1794 * Adjust available bytes according to refquota |
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1795 */ |
|
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1796 if (*refdbytesp < ds->ds_quota) |
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1797 *availbytesp = MIN(*availbytesp, |
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1798 ds->ds_quota - *refdbytesp); |
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1799 else |
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1800 *availbytesp = 0; |
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1801 } |
| 2885 | 1802 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1803 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1804 } |
| 1805 | |
|
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1806 boolean_t |
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1807 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1808 { |
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1809 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1810 |
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1811 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
|
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1812 dsl_pool_sync_context(dp)); |
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1813 if (ds->ds_prev == NULL) |
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1814 return (B_FALSE); |
|
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1815 if (ds->ds_phys->ds_bp.blk_birth > |
|
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1816 ds->ds_prev->ds_phys->ds_creation_txg) |
|
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1817 return (B_TRUE); |
|
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1818 return (B_FALSE); |
|
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1819 } |
|
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1820 |
| 2199 | 1821 /* ARGSUSED */ |
| 789 | 1822 static int |
| 2199 | 1823 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1824 { |
| 2199 | 1825 dsl_dataset_t *ds = arg1; |
| 1826 char *newsnapname = arg2; | |
| 1827 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1828 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1829 dsl_dataset_t *hds; |
| 1830 uint64_t val; | |
| 789 | 1831 int err; |
| 1832 | |
| 2199 | 1833 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1834 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1835 if (err) |
| 1836 return (err); | |
| 1837 | |
| 2199 | 1838 /* new name better not be in use */ |
| 1839 err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1840 newsnapname, 8, 1, &val); | |
| 1841 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); | |
| 789 | 1842 |
| 2199 | 1843 if (err == 0) |
| 1844 err = EEXIST; | |
| 1845 else if (err == ENOENT) | |
| 1846 err = 0; | |
| 4007 | 1847 |
| 1848 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1849 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1850 err = ENAMETOOLONG; | |
| 1851 | |
| 2199 | 1852 return (err); |
| 1853 } | |
| 789 | 1854 |
| 2199 | 1855 static void |
| 4543 | 1856 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1857 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1858 { |
| 1859 dsl_dataset_t *ds = arg1; | |
| 4543 | 1860 const char *newsnapname = arg2; |
| 2199 | 1861 dsl_dir_t *dd = ds->ds_dir; |
| 1862 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1863 dsl_dataset_t *hds; | |
| 1864 int err; | |
| 789 | 1865 |
| 2199 | 1866 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1867 |
| 2199 | 1868 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1869 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1870 |
| 2199 | 1871 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 1872 err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1873 ds->ds_snapname, tx); | |
| 789 | 1874 ASSERT3U(err, ==, 0); |
| 2199 | 1875 mutex_enter(&ds->ds_lock); |
| 1876 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1877 mutex_exit(&ds->ds_lock); | |
| 1878 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1879 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1880 ASSERT3U(err, ==, 0); |
| 1881 | |
| 4543 | 1882 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 1883 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1884 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1885 } |
| 1886 | |
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1887 struct renamesnaparg { |
| 4007 | 1888 dsl_sync_task_group_t *dstg; |
| 1889 char failed[MAXPATHLEN]; | |
| 1890 char *oldsnap; | |
| 1891 char *newsnap; | |
| 1892 }; | |
| 1893 | |
| 1894 static int | |
| 1895 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1896 { | |
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1897 struct renamesnaparg *ra = arg; |
| 4007 | 1898 dsl_dataset_t *ds = NULL; |
| 1899 char *cp; | |
| 1900 int err; | |
| 1901 | |
| 1902 cp = name + strlen(name); | |
| 1903 *cp = '@'; | |
| 1904 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 1905 |
| 1906 /* | |
| 1907 * For recursive snapshot renames the parent won't be changing | |
| 1908 * so we just pass name for both the to/from argument. | |
| 1909 */ | |
| 1910 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 1911 (void) strcpy(ra->failed, name); | |
| 1912 return (err); | |
| 1913 } | |
| 1914 | |
| 4007 | 1915 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
| 1916 ra->dstg, &ds); | |
| 1917 if (err == ENOENT) { | |
| 1918 *cp = '\0'; | |
| 1919 return (0); | |
| 1920 } | |
| 1921 if (err) { | |
| 1922 (void) strcpy(ra->failed, name); | |
| 1923 *cp = '\0'; | |
| 1924 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1925 return (err); | |
| 1926 } | |
| 1927 | |
| 1928 #ifdef _KERNEL | |
| 1929 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1930 (void) zfs_unmount_snap(name, NULL); | |
| 1931 #endif | |
| 1932 | |
| 1933 *cp = '\0'; | |
| 1934 | |
| 1935 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1936 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1937 | |
| 1938 return (0); | |
| 1939 } | |
| 1940 | |
| 1941 static int | |
| 1942 dsl_recursive_rename(char *oldname, const char *newname) | |
| 1943 { | |
| 1944 int err; | |
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1945 struct renamesnaparg *ra; |
| 4007 | 1946 dsl_sync_task_t *dst; |
| 1947 spa_t *spa; | |
| 1948 char *cp, *fsname = spa_strdup(oldname); | |
| 1949 int len = strlen(oldname); | |
| 1950 | |
| 1951 /* truncate the snapshot name to get the fsname */ | |
| 1952 cp = strchr(fsname, '@'); | |
| 1953 *cp = '\0'; | |
| 1954 | |
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1955 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 1956 if (err) { |
| 1957 kmem_free(fsname, len + 1); | |
| 1958 return (err); | |
| 1959 } | |
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1960 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 1961 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 1962 | |
| 1963 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 1964 ra->newsnap = strchr(newname, '@') + 1; | |
| 1965 *ra->failed = '\0'; | |
| 1966 | |
| 1967 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 1968 DS_FIND_CHILDREN); | |
| 1969 kmem_free(fsname, len + 1); | |
| 1970 | |
| 1971 if (err == 0) { | |
| 1972 err = dsl_sync_task_group_wait(ra->dstg); | |
| 1973 } | |
| 1974 | |
| 1975 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 1976 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 1977 dsl_dataset_t *ds = dst->dst_arg1; | |
| 1978 if (dst->dst_err) { | |
| 1979 dsl_dir_name(ds->ds_dir, ra->failed); | |
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1980 (void) strcat(ra->failed, "@"); |
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1981 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 1982 } |
| 1983 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1984 } | |
| 1985 | |
| 4543 | 1986 if (err) |
| 1987 (void) strcpy(oldname, ra->failed); | |
| 4007 | 1988 |
| 1989 dsl_sync_task_group_destroy(ra->dstg); | |
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1990 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 1991 spa_close(spa, FTAG); |
| 1992 return (err); | |
| 1993 } | |
| 1994 | |
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1995 static int |
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1996 dsl_valid_rename(char *oldname, void *arg) |
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1997 { |
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1998 int delta = *(int *)arg; |
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1999 |
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2000 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2001 return (ENAMETOOLONG); |
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2002 |
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2003 return (0); |
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2004 } |
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2005 |
| 789 | 2006 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2007 int | |
| 4007 | 2008 dsl_dataset_rename(char *oldname, const char *newname, |
| 2009 boolean_t recursive) | |
| 789 | 2010 { |
| 2011 dsl_dir_t *dd; | |
| 2199 | 2012 dsl_dataset_t *ds; |
| 789 | 2013 const char *tail; |
| 2014 int err; | |
| 2015 | |
| 2199 | 2016 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2017 if (err) |
| 2018 return (err); | |
| 789 | 2019 if (tail == NULL) { |
|
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2020 int delta = strlen(newname) - strlen(oldname); |
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2021 |
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2022 /* if we're growing, validate child size lengths */ |
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2023 if (delta > 0) |
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2024 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2025 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2026 |
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2027 if (!err) |
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2028 err = dsl_dir_rename(dd, newname); |
| 789 | 2029 dsl_dir_close(dd, FTAG); |
| 2030 return (err); | |
| 2031 } | |
| 2032 if (tail[0] != '@') { | |
| 2033 /* the name ended in a nonexistant component */ | |
| 2034 dsl_dir_close(dd, FTAG); | |
| 2035 return (ENOENT); | |
| 2036 } | |
| 2037 | |
| 2199 | 2038 dsl_dir_close(dd, FTAG); |
| 2039 | |
| 2040 /* new name must be snapshot in same filesystem */ | |
| 2041 tail = strchr(newname, '@'); | |
| 2042 if (tail == NULL) | |
| 2043 return (EINVAL); | |
| 2044 tail++; | |
| 2045 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2046 return (EXDEV); | |
| 789 | 2047 |
| 4007 | 2048 if (recursive) { |
| 2049 err = dsl_recursive_rename(oldname, newname); | |
| 2050 } else { | |
| 2051 err = dsl_dataset_open(oldname, | |
| 2052 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 2053 if (err) | |
| 2054 return (err); | |
| 2199 | 2055 |
| 4007 | 2056 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2057 dsl_dataset_snapshot_rename_check, | |
| 2058 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2059 |
| 4007 | 2060 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 2061 } | |
| 2199 | 2062 |
| 789 | 2063 return (err); |
| 2064 } | |
| 2082 | 2065 |
| 2199 | 2066 struct promotearg { |
| 2067 uint64_t used, comp, uncomp, unique; | |
| 2068 uint64_t newnext_obj, snapnames_obj; | |
| 2069 }; | |
| 2070 | |
| 4543 | 2071 /* ARGSUSED */ |
| 2082 | 2072 static int |
| 2199 | 2073 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2074 { |
| 2199 | 2075 dsl_dataset_t *hds = arg1; |
| 2076 struct promotearg *pa = arg2; | |
| 2077 dsl_dir_t *dd = hds->ds_dir; | |
| 2078 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2079 dsl_dir_t *odd = NULL; |
| 2082 | 2080 dsl_dataset_t *ds = NULL; |
| 5367 | 2081 dsl_dataset_t *origin_ds = NULL; |
| 2082 | 2082 dsl_dataset_t *newnext_ds = NULL; |
| 2083 int err; | |
| 2084 char *name = NULL; | |
| 2199 | 2085 uint64_t itor = 0; |
| 2082 | 2086 blkptr_t bp; |
| 2087 | |
| 2199 | 2088 bzero(pa, sizeof (*pa)); |
| 2089 | |
| 2082 | 2090 /* Check that it is a clone */ |
| 5367 | 2091 if (dd->dd_phys->dd_origin_obj == 0) |
| 2082 | 2092 return (EINVAL); |
| 2093 | |
| 2199 | 2094 /* Since this is so expensive, don't do the preliminary check */ |
| 2095 if (!dmu_tx_is_syncing(tx)) | |
| 2096 return (0); | |
| 2097 | |
| 5367 | 2098 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2099 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
| 2082 | 2100 goto out; |
| 5367 | 2101 odd = origin_ds->ds_dir; |
| 2199 | 2102 |
| 2103 { | |
| 2104 dsl_dataset_t *phds; | |
| 2105 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 5367 | 2106 odd->dd_phys->dd_head_dataset_obj, |
| 2199 | 2107 NULL, DS_MODE_NONE, FTAG, &phds)) |
| 2108 goto out; | |
| 2109 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; | |
| 2110 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 2111 } | |
| 2082 | 2112 |
| 2113 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 2114 err = EXDEV; | |
| 2115 goto out; | |
| 2116 } | |
| 2117 | |
| 5367 | 2118 /* find origin's new next ds */ |
| 2082 | 2119 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
| 2120 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 5367 | 2121 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2122 dsl_dataset_t *prev; |
| 2123 | |
| 2124 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 2125 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 2126 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 2127 goto out; |
| 2128 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2129 newnext_ds = prev; | |
| 2130 } | |
| 2199 | 2131 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2132 |
| 5367 | 2133 /* compute origin's new unique space */ |
| 2082 | 2134 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2135 &itor, &bp)) == 0) { | |
| 5367 | 2136 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
| 2199 | 2137 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 2138 } |
| 2139 if (err != ENOENT) | |
| 2140 goto out; | |
| 2141 | |
| 2142 /* Walk the snapshots that we are moving */ | |
| 2143 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 5367 | 2144 ds = origin_ds; |
| 2082 | 2145 /* CONSTCOND */ |
| 2146 while (TRUE) { | |
| 2147 uint64_t val, dlused, dlcomp, dluncomp; | |
| 2148 dsl_dataset_t *prev; | |
| 2149 | |
| 2150 /* Check that the snapshot name does not conflict */ | |
| 2151 dsl_dataset_name(ds, name); | |
| 2152 err = zap_lookup(dd->dd_pool->dp_meta_objset, | |
| 2153 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, | |
| 2154 8, 1, &val); | |
| 2155 if (err != ENOENT) { | |
| 2156 if (err == 0) | |
| 2157 err = EEXIST; | |
| 2158 goto out; | |
| 2159 } | |
| 2160 | |
| 2161 /* | |
| 2162 * compute space to transfer. Each snapshot gave birth to: | |
| 2163 * (my used) - (prev's used) + (deadlist's used) | |
| 2164 */ | |
| 2199 | 2165 pa->used += ds->ds_phys->ds_used_bytes; |
| 2166 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 2167 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2168 |
| 2169 /* If we reach the first snapshot, we're done. */ | |
| 2170 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2171 break; | |
| 2172 | |
| 2173 if (err = bplist_space(&ds->ds_deadlist, | |
| 2174 &dlused, &dlcomp, &dluncomp)) | |
| 2175 goto out; | |
| 2176 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2177 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 2178 FTAG, &prev)) | |
| 2179 goto out; | |
| 2199 | 2180 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 2181 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 2182 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2183 |
| 2184 /* | |
| 2185 * We could be a clone of a clone. If we reach our | |
| 2186 * parent's branch point, we're done. | |
| 2187 */ | |
| 2188 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2189 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2190 break; | |
| 2191 } | |
| 5367 | 2192 if (ds != origin_ds) |
| 2082 | 2193 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2194 ds = prev; | |
| 2195 } | |
| 2196 | |
| 2197 /* Check that there is enough space here */ | |
| 5367 | 2198 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
| 2199 | 2199 |
| 2200 out: | |
| 5367 | 2201 if (ds && ds != origin_ds) |
| 2199 | 2202 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 5367 | 2203 if (origin_ds) |
| 2204 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2205 if (newnext_ds) |
| 2206 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2207 if (name) | |
| 2208 kmem_free(name, MAXPATHLEN); | |
| 2209 return (err); | |
| 2210 } | |
| 2082 | 2211 |
| 2199 | 2212 static void |
| 4543 | 2213 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2214 { |
| 2215 dsl_dataset_t *hds = arg1; | |
| 2216 struct promotearg *pa = arg2; | |
| 2217 dsl_dir_t *dd = hds->ds_dir; | |
| 2218 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2219 dsl_dir_t *odd = NULL; |
| 2220 dsl_dataset_t *ds, *origin_ds; | |
| 2199 | 2221 char *name; |
| 2222 | |
| 5367 | 2223 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
| 2199 | 2224 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
| 2225 | |
| 5367 | 2226 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2227 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
| 2417 | 2228 /* |
| 5367 | 2229 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2230 * changing. |
| 2231 */ | |
| 5367 | 2232 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2233 NULL, FTAG, &odd)); | |
| 2082 | 2234 |
| 2235 /* move snapshots to this dir */ | |
| 2199 | 2236 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 5367 | 2237 ds = origin_ds; |
| 2082 | 2238 /* CONSTCOND */ |
| 2239 while (TRUE) { | |
| 2240 dsl_dataset_t *prev; | |
| 2241 | |
| 2242 /* move snap name entry */ | |
| 2243 dsl_dataset_name(ds, name); | |
| 2199 | 2244 VERIFY(0 == zap_remove(dp->dp_meta_objset, |
| 2245 pa->snapnames_obj, ds->ds_snapname, tx)); | |
| 2246 VERIFY(0 == zap_add(dp->dp_meta_objset, | |
| 2082 | 2247 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2248 8, 1, &ds->ds_object, tx)); | |
| 2249 | |
| 2250 /* change containing dsl_dir */ | |
| 2251 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2252 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2253 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2254 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2255 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2256 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2257 NULL, ds, &ds->ds_dir)); |
| 2258 | |
| 2259 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 2260 | |
| 2261 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2262 break; | |
| 2263 | |
| 2199 | 2264 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 2265 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 2266 FTAG, &prev)); | |
| 2267 | |
| 2268 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2269 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2270 break; | |
| 2271 } | |
| 5367 | 2272 if (ds != origin_ds) |
| 2082 | 2273 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2274 ds = prev; | |
| 2275 } | |
| 5367 | 2276 if (ds != origin_ds) |
| 2199 | 2277 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2082 | 2278 |
| 5367 | 2279 /* change origin's next snap */ |
| 2280 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
| 2281 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
| 2082 | 2282 |
| 5367 | 2283 /* change origin */ |
| 2082 | 2284 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 2285 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
| 2286 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
| 2287 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
| 2288 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
| 2082 | 2289 |
| 2290 /* change space accounting */ | |
| 5367 | 2291 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2292 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2293 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2294 |
| 4543 | 2295 /* log history record */ |
| 2296 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
| 2297 cr, "dataset = %llu", ds->ds_object); | |
| 2298 | |
| 5367 | 2299 dsl_dir_close(odd, FTAG); |
| 2300 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2301 kmem_free(name, MAXPATHLEN); |
| 2082 | 2302 } |
| 2303 | |
| 2304 int | |
| 2305 dsl_dataset_promote(const char *name) | |
| 2306 { | |
| 2307 dsl_dataset_t *ds; | |
| 2308 int err; | |
| 2309 dmu_object_info_t doi; | |
| 2199 | 2310 struct promotearg pa; |
| 2082 | 2311 |
| 2312 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 2313 if (err) | |
| 2314 return (err); | |
| 2315 | |
| 2316 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 2317 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 2318 if (err) { | |
| 2319 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2320 return (err); | |
| 2321 } | |
| 2322 | |
| 2323 /* | |
| 2324 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 2325 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2326 * bonus buffers. | |
| 2327 */ | |
| 2199 | 2328 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2329 dsl_dataset_promote_check, | |
| 2330 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2331 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2332 return (err); | |
| 2333 } | |
| 3912 | 2334 |
| 5367 | 2335 struct cloneswaparg { |
| 2336 dsl_dataset_t *cds; /* clone dataset */ | |
| 2337 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2338 boolean_t force; | |
|
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2339 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2340 }; |
|
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2341 |
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2342 /* ARGSUSED */ |
|
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2343 static int |
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2344 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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2345 { |
| 5367 | 2346 struct cloneswaparg *csa = arg1; |
|
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2347 |
| 5367 | 2348 /* they should both be heads */ |
| 2349 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2350 dsl_dataset_is_snapshot(csa->ohds)) | |
|
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2351 return (EINVAL); |
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2352 |
| 5367 | 2353 /* the branch point should be just before them */ |
| 2354 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
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2355 return (EINVAL); |
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2356 |
| 5367 | 2357 /* cds should be the clone */ |
| 2358 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2359 csa->ohds->ds_object) | |
| 2360 return (EINVAL); | |
|
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2361 |
| 5367 | 2362 /* the clone should be a child of the origin */ |
| 2363 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2364 return (EINVAL); | |
|
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2365 |
| 5367 | 2366 /* ohds shouldn't be modified unless 'force' */ |
| 2367 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2368 return (ETXTBSY); | |
|
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2369 |
|
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2370 /* adjust amount of any unconsumed refreservation */ |
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2371 csa->unused_refres_delta = |
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2372 (int64_t)MIN(csa->ohds->ds_reserved, |
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2373 csa->ohds->ds_phys->ds_unique_bytes) - |
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2374 (int64_t)MIN(csa->ohds->ds_reserved, |
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2375 csa->cds->ds_phys->ds_unique_bytes); |
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2376 |
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2377 if (csa->unused_refres_delta > 0 && |
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2378 csa->unused_refres_delta > |
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2379 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
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2380 return (ENOSPC); |
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2381 |
| 5367 | 2382 return (0); |
|
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2383 } |
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2384 |
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2385 /* ARGSUSED */ |
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2386 static void |
|
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2387 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
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2388 { |
| 5367 | 2389 struct cloneswaparg *csa = arg1; |
| 2390 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
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2391 uint64_t itor = 0; |
|
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2392 blkptr_t bp; |
|
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2393 uint64_t unique = 0; |
|
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2394 int err; |
|
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2395 |
|
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2396 ASSERT(csa->cds->ds_reserved == 0); |
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2397 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
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2398 |
| 5367 | 2399 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2400 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2401 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
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2402 |
| 5367 | 2403 if (csa->cds->ds_user_ptr != NULL) { |
| 2404 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2405 csa->cds->ds_user_ptr = NULL; | |
| 2406 } | |
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2407 |
| 5367 | 2408 if (csa->ohds->ds_user_ptr != NULL) { |
| 2409 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2410 csa->ohds->ds_user_ptr); | |
| 2411 csa->ohds->ds_user_ptr = NULL; | |
| 2412 } | |
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2413 |
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2414 /* compute unique space */ |
| 5367 | 2415 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2416 &itor, &bp)) == 0) { | |
| 2417 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2418 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
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2419 } |
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2420 VERIFY(err == ENOENT); |
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2421 |
|
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2422 /* reset origin's unique bytes */ |
| 5367 | 2423 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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2424 |
|
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2425 /* swap blkptrs */ |
|
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2426 { |
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2427 blkptr_t tmp; |
| 5367 | 2428 tmp = csa->ohds->ds_phys->ds_bp; |
| 2429 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2430 csa->cds->ds_phys->ds_bp = tmp; | |
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2431 } |
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2432 |
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2433 /* set dd_*_bytes */ |
|
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2434 { |
|
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2435 int64_t dused, dcomp, duncomp; |
|
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2436 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
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2437 uint64_t odl_used, odl_comp, odl_uncomp; |
|
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2438 |
| 5367 | 2439 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
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2440 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2441 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
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2442 &odl_comp, &odl_uncomp)); |
| 5367 | 2443 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2444 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2445 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2446 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2447 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2448 cdl_uncomp - | |
| 2449 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
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2450 |
| 5367 | 2451 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2452 dused, dcomp, duncomp, tx); | |
| 2453 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2454 -dused, -dcomp, -duncomp, tx); | |
| 2455 } | |
| 2456 | |
| 2457 #define SWITCH64(x, y) \ | |
| 2458 { \ | |
| 2459 uint64_t __tmp = (x); \ | |
| 2460 (x) = (y); \ | |
| 2461 (y) = __tmp; \ | |
|
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2462 } |
|
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2463 |
|
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2464 /* swap ds_*_bytes */ |
| 5367 | 2465 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2466 csa->cds->ds_phys->ds_used_bytes); | |
| 2467 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2468 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2469 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2470 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
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diff
changeset
|
2471 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
|
2472 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2473 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2474 /* apply any parent delta for change in unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2475 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2476 0, 0, tx); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2477 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2478 /* swap deadlists */ |
| 5367 | 2479 bplist_close(&csa->cds->ds_deadlist); |
| 2480 bplist_close(&csa->ohds->ds_deadlist); | |
| 2481 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2482 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2483 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2484 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2485 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2486 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2487 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2488 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2489 /* |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2490 * Swap 'clone' with its origin head file system. |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2491 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2492 int |
| 5367 | 2493 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2494 boolean_t force) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2495 { |
| 5367 | 2496 struct cloneswaparg csa; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2497 |
| 5367 | 2498 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
| 2499 ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2500 |
| 5367 | 2501 csa.cds = clone; |
| 2502 csa.ohds = origin_head; | |
| 2503 csa.force = force; | |
| 2504 return (dsl_sync_task_do(clone->ds_dir->dd_pool, | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2505 dsl_dataset_clone_swap_check, |
| 5367 | 2506 dsl_dataset_clone_swap_sync, &csa, NULL, 9)); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2507 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2508 |
| 3912 | 2509 /* |
| 2510 * Given a pool name and a dataset object number in that pool, | |
| 2511 * return the name of that dataset. | |
| 2512 */ | |
| 2513 int | |
| 2514 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2515 { | |
| 2516 spa_t *spa; | |
| 2517 dsl_pool_t *dp; | |
| 2518 dsl_dataset_t *ds = NULL; | |
| 2519 int error; | |
| 2520 | |
| 2521 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2522 return (error); | |
| 2523 dp = spa_get_dsl(spa); | |
| 2524 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2525 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2526 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2527 rw_exit(&dp->dp_config_rwlock); | |
| 2528 spa_close(spa, FTAG); | |
| 2529 return (error); | |
| 2530 } | |
| 2531 dsl_dataset_name(ds, buf); | |
| 2532 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2533 rw_exit(&dp->dp_config_rwlock); | |
| 2534 spa_close(spa, FTAG); | |
| 2535 | |
| 2536 return (0); | |
| 2537 } | |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2538 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2539 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2540 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
changeset
|
2541 uint64_t asize, uint64_t inflight, uint64_t *used) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2542 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2543 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2544 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2545 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2546 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2547 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2548 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2549 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2550 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2551 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2552 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2553 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2554 *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
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
parents:
5367
diff
changeset
|
2556 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2557 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2558 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2559 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2560 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2561 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2562 * If they are requesting more space, and our current estimate |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2563 * is over quota, they get to try again unless the actual |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2564 * on-disk is over quota and there are no pending changes (which |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2565 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2566 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2567 if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2568 if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2569 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2570 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2571 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2572 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2573 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2574 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2575 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2576 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2577 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2578 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2579 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2580 dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2581 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2582 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2583 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2584 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2585 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2586 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2587 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2588 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2589 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2590 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2591 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2592 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2593 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2594 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2595 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2596 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2597 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2598 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2599 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2600 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2601 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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5367
diff
changeset
|
2602 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2603 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2604 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2605 uint64_t new_quota = *quotap; |
|
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 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2608 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2609 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2610 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2611 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2612 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2613 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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5367
diff
changeset
|
2614 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2615 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
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5367
diff
changeset
|
2616 tx, cr, "%lld dataset = %llu ", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2617 (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
|
2618 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2619 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2620 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2621 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
|
2622 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2623 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2624 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2625 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2626 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
|
2627 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2628 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2629 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2630 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2631 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2632 * 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
|
2633 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2634 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2635 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2636 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2637 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2638 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2639 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2640 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2641 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2642 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2643 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2644 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2645 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2646 dsl_dataset_set_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
|
2647 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2648 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2649 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2650 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2651 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2652 uint64_t unique; |
|
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 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2655 return (EOVERFLOW); |
|
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 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
|
2658 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2659 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2660 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2661 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2662 return (EINVAL); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2663 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2664 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2665 * 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
|
2666 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2667 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2668 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2669 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2670 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2671 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2672 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2673 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
|
2674 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2675 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2676 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2677 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
|
2678 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2679 if (delta > 0 && ds->ds_quota > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2680 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2681 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2682 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2683 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2684 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2685 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2686 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2687 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2688 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
|
2689 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2690 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2691 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2692 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2693 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2694 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2695 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2696 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2697 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2698 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2699 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2700 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2701 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2702 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2703 ds->ds_reserved = new_reservation; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2704 mutex_exit(&ds->ds_lock); |
|
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 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2707 new_reservation, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2708 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2709 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
|
2710 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2711 spa_history_internal_log(LOG_DS_REFRESERV, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2712 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
|
2713 (longlong_t)new_reservation, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2714 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2715 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2716 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2717 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2718 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
|
2719 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2720 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2721 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2722 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2723 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
|
2724 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2725 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2726 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2727 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
|
2728 dsl_dataset_set_reservation_check, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2729 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2730 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2731 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2732 } |