Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 5446:51fbc14b301d
6421210 zfs rollback without unmounting
6597358 assertion failed in dsl_dir_stats()
6623982 stack overflow due to zfs_ioc_recv()
6626110 recvflags_t could use a comment
6626117 z_dbuf_held is redundant (use z_dbuf != NULL)
| author | ahrens |
|---|---|
| date | Fri, 09 Nov 2007 15:28:25 -0800 |
| parents | 26d61472aeae |
| children | e140313199cc |
| 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 | |
| 1544 | 377 if (err == 0) { |
| 378 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 379 dsl_dataset_evict); | |
| 380 } | |
| 381 if (err || winner) { | |
| 789 | 382 bplist_close(&ds->ds_deadlist); |
| 383 if (ds->ds_prev) { | |
| 384 dsl_dataset_close(ds->ds_prev, | |
| 385 DS_MODE_NONE, ds); | |
| 386 } | |
| 387 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 388 mutex_destroy(&ds->ds_lock); |
| 4787 | 389 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 390 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 789 | 391 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 392 if (err) { |
| 393 dmu_buf_rele(dbuf, tag); | |
| 394 return (err); | |
| 395 } | |
| 789 | 396 ds = winner; |
| 397 } else { | |
| 4787 | 398 ds->ds_fsid_guid = |
| 789 | 399 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 400 } | |
|
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401 |
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402 if (!dsl_dataset_is_snapshot(ds)) { |
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403 boolean_t need_lock = |
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404 !RW_LOCK_HELD(&dp->dp_config_rwlock); |
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405 |
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406 if (need_lock) |
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407 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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408 VERIFY(0 == dsl_prop_get_ds_locked(ds->ds_dir, |
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409 "refreservation", sizeof (uint64_t), 1, |
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410 &ds->ds_reserved, NULL)); |
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411 VERIFY(0 == dsl_prop_get_ds_locked(ds->ds_dir, |
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412 "refquota", sizeof (uint64_t), 1, &ds->ds_quota, |
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413 NULL)); |
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414 if (need_lock) |
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415 rw_exit(&dp->dp_config_rwlock); |
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416 } else { |
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417 ds->ds_reserved = ds->ds_quota = 0; |
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418 } |
| 789 | 419 } |
| 420 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 421 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 422 | |
| 423 mutex_enter(&ds->ds_lock); | |
| 424 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 425 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 426 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
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427 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 428 mutex_exit(&ds->ds_lock); |
| 429 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 430 return (EBUSY); |
| 789 | 431 } |
| 432 ds->ds_open_refcount += weight; | |
| 433 mutex_exit(&ds->ds_lock); | |
| 434 | |
| 1544 | 435 *dsp = ds; |
| 436 return (0); | |
| 789 | 437 } |
| 438 | |
| 439 int | |
| 440 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 441 void *tag, dsl_dataset_t **dsp) | |
| 442 { | |
| 443 dsl_dir_t *dd; | |
| 444 dsl_pool_t *dp; | |
| 445 const char *tail; | |
| 446 uint64_t obj; | |
| 447 dsl_dataset_t *ds = NULL; | |
| 448 int err = 0; | |
| 449 | |
| 1544 | 450 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 451 if (err) | |
| 452 return (err); | |
| 789 | 453 |
| 454 dp = dd->dd_pool; | |
| 455 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 456 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 457 if (obj == 0) { | |
| 458 /* A dataset with no associated objset */ | |
| 459 err = ENOENT; | |
| 460 goto out; | |
| 461 } | |
| 462 | |
| 463 if (tail != NULL) { | |
| 464 objset_t *mos = dp->dp_meta_objset; | |
| 465 | |
| 1544 | 466 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 467 DS_MODE_NONE, tag, &ds); | |
| 468 if (err) | |
| 469 goto out; | |
| 789 | 470 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 471 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 472 ds = NULL; | |
| 473 | |
| 474 if (tail[0] != '@') { | |
| 475 err = ENOENT; | |
| 476 goto out; | |
| 477 } | |
| 478 tail++; | |
| 479 | |
| 480 /* Look for a snapshot */ | |
| 481 if (!DS_MODE_IS_READONLY(mode)) { | |
| 482 err = EROFS; | |
| 483 goto out; | |
| 484 } | |
| 485 dprintf("looking for snapshot '%s'\n", tail); | |
| 486 err = zap_lookup(mos, obj, tail, 8, 1, &obj); | |
| 487 if (err) | |
| 488 goto out; | |
| 489 } | |
| 1544 | 490 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 491 |
| 492 out: | |
| 493 rw_exit(&dp->dp_config_rwlock); | |
| 494 dsl_dir_close(dd, FTAG); | |
| 495 | |
| 496 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 497 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 498 | |
| 499 *dsp = ds; | |
| 500 return (err); | |
| 501 } | |
| 502 | |
| 503 int | |
| 504 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 505 { | |
| 506 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 507 } | |
| 508 | |
| 509 void | |
| 510 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 511 { | |
| 512 if (ds == NULL) { | |
| 513 (void) strcpy(name, "mos"); | |
| 514 } else { | |
| 515 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 516 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 517 if (ds->ds_snapname[0]) { |
| 518 (void) strcat(name, "@"); | |
| 519 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 520 /* | |
| 521 * We use a "recursive" mutex so that we | |
| 522 * can call dprintf_ds() with ds_lock held. | |
| 523 */ | |
| 524 mutex_enter(&ds->ds_lock); | |
| 525 (void) strcat(name, ds->ds_snapname); | |
| 526 mutex_exit(&ds->ds_lock); | |
| 527 } else { | |
| 528 (void) strcat(name, ds->ds_snapname); | |
| 529 } | |
| 530 } | |
| 531 } | |
| 532 } | |
| 533 | |
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534 static int |
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535 dsl_dataset_namelen(dsl_dataset_t *ds) |
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536 { |
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537 int result; |
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538 |
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539 if (ds == NULL) { |
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540 result = 3; /* "mos" */ |
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541 } else { |
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542 result = dsl_dir_namelen(ds->ds_dir); |
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543 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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544 if (ds->ds_snapname[0]) { |
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545 ++result; /* adding one for the @-sign */ |
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546 if (!MUTEX_HELD(&ds->ds_lock)) { |
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547 /* see dsl_datset_name */ |
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548 mutex_enter(&ds->ds_lock); |
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549 result += strlen(ds->ds_snapname); |
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550 mutex_exit(&ds->ds_lock); |
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551 } else { |
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552 result += strlen(ds->ds_snapname); |
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553 } |
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554 } |
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555 } |
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556 |
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557 return (result); |
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558 } |
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559 |
| 789 | 560 void |
| 561 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 562 { | |
| 563 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 564 mutex_enter(&ds->ds_lock); | |
| 565 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 566 ds->ds_open_refcount -= weight; | |
| 567 dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", | |
| 568 mode, ds->ds_open_refcount); | |
| 569 mutex_exit(&ds->ds_lock); | |
| 570 | |
| 1544 | 571 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 572 } |
| 573 | |
| 574 void | |
| 5367 | 575 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
| 576 { | |
| 577 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 578 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 579 mutex_enter(&ds->ds_lock); | |
| 580 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 581 ASSERT3U(oldweight, >=, newweight); | |
| 582 ds->ds_open_refcount -= oldweight; | |
| 583 ds->ds_open_refcount += newweight; | |
| 584 mutex_exit(&ds->ds_lock); | |
| 585 } | |
| 586 | |
| 587 boolean_t | |
| 588 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
| 589 { | |
| 590 boolean_t rv; | |
| 591 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 592 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 593 mutex_enter(&ds->ds_lock); | |
| 594 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 595 ASSERT3U(newweight, >=, oldweight); | |
| 596 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
| 597 rv = B_FALSE; | |
| 598 } else { | |
| 599 ds->ds_open_refcount -= oldweight; | |
| 600 ds->ds_open_refcount += newweight; | |
| 601 rv = B_TRUE; | |
| 602 } | |
| 603 mutex_exit(&ds->ds_lock); | |
| 604 return (rv); | |
| 605 } | |
| 606 | |
| 607 void | |
| 789 | 608 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 609 { | |
| 610 objset_t *mos = dp->dp_meta_objset; | |
| 611 dmu_buf_t *dbuf; | |
| 612 dsl_dataset_phys_t *dsphys; | |
| 613 dsl_dataset_t *ds; | |
| 614 uint64_t dsobj; | |
| 615 dsl_dir_t *dd; | |
| 616 | |
| 617 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 618 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 619 |
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620 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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621 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 622 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 623 dmu_buf_will_dirty(dbuf, tx); |
| 624 dsphys = dbuf->db_data; | |
| 625 dsphys->ds_dir_obj = dd->dd_object; | |
| 626 dsphys->ds_fsid_guid = unique_create(); | |
| 627 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 628 sizeof (dsphys->ds_guid)); | |
| 629 dsphys->ds_snapnames_zapobj = | |
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630 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 631 dsphys->ds_creation_time = gethrestime_sec(); |
| 632 dsphys->ds_creation_txg = tx->tx_txg; | |
| 633 dsphys->ds_deadlist_obj = | |
| 634 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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635 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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636 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 637 dmu_buf_rele(dbuf, FTAG); |
| 789 | 638 |
| 639 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 640 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 641 dsl_dir_close(dd, FTAG); | |
| 642 | |
| 1544 | 643 VERIFY(0 == |
| 644 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
|
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645 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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646 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 647 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 648 } | |
| 649 | |
| 2199 | 650 uint64_t |
| 5367 | 651 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, dmu_tx_t *tx) |
| 789 | 652 { |
| 5367 | 653 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 654 dmu_buf_t *dbuf; |
| 655 dsl_dataset_phys_t *dsphys; | |
| 5367 | 656 uint64_t dsobj; |
| 789 | 657 objset_t *mos = dp->dp_meta_objset; |
| 658 | |
| 5367 | 659 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 660 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 661 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 662 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 663 |
|
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664 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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665 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 666 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 667 dmu_buf_will_dirty(dbuf, tx); |
| 668 dsphys = dbuf->db_data; | |
| 669 dsphys->ds_dir_obj = dd->dd_object; | |
| 670 dsphys->ds_fsid_guid = unique_create(); | |
| 671 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 672 sizeof (dsphys->ds_guid)); | |
| 673 dsphys->ds_snapnames_zapobj = | |
|
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674 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 675 dsphys->ds_creation_time = gethrestime_sec(); |
| 676 dsphys->ds_creation_txg = tx->tx_txg; | |
| 677 dsphys->ds_deadlist_obj = | |
| 678 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
|
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679 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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680 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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681 |
| 5367 | 682 if (origin) { |
| 683 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 684 dsphys->ds_prev_snap_txg = |
| 5367 | 685 origin->ds_phys->ds_creation_txg; |
| 789 | 686 dsphys->ds_used_bytes = |
| 5367 | 687 origin->ds_phys->ds_used_bytes; |
| 789 | 688 dsphys->ds_compressed_bytes = |
| 5367 | 689 origin->ds_phys->ds_compressed_bytes; |
| 789 | 690 dsphys->ds_uncompressed_bytes = |
| 5367 | 691 origin->ds_phys->ds_uncompressed_bytes; |
| 692 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
| 789 | 693 |
| 5367 | 694 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 695 origin->ds_phys->ds_num_children++; | |
| 789 | 696 |
| 697 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 698 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 699 } |
| 1544 | 700 dmu_buf_rele(dbuf, FTAG); |
| 789 | 701 |
| 702 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 703 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 704 |
| 705 return (dsobj); | |
| 706 } | |
| 707 | |
| 708 uint64_t | |
| 709 dsl_dataset_create_sync(dsl_dir_t *pdd, | |
| 710 const char *lastname, dsl_dataset_t *origin, cred_t *cr, dmu_tx_t *tx) | |
| 711 { | |
| 712 dsl_pool_t *dp = pdd->dd_pool; | |
| 713 uint64_t dsobj, ddobj; | |
| 714 dsl_dir_t *dd; | |
| 715 | |
| 716 ASSERT(lastname[0] != '@'); | |
| 717 | |
| 718 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 719 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 720 | |
| 721 dsobj = dsl_dataset_create_sync_impl(dd, origin, tx); | |
| 722 | |
| 723 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 724 | |
| 789 | 725 dsl_dir_close(dd, FTAG); |
| 726 | |
| 2199 | 727 return (dsobj); |
| 728 } | |
| 729 | |
| 730 struct destroyarg { | |
| 731 dsl_sync_task_group_t *dstg; | |
| 732 char *snapname; | |
| 733 char *failed; | |
| 734 }; | |
| 735 | |
| 736 static int | |
| 737 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 738 { | |
| 739 struct destroyarg *da = arg; | |
| 740 dsl_dataset_t *ds; | |
| 741 char *cp; | |
| 742 int err; | |
| 743 | |
| 744 (void) strcat(name, "@"); | |
| 745 (void) strcat(name, da->snapname); | |
| 746 err = dsl_dataset_open(name, | |
| 747 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 748 da->dstg, &ds); |
| 2199 | 749 cp = strchr(name, '@'); |
| 750 *cp = '\0'; | |
| 751 if (err == ENOENT) | |
| 752 return (0); | |
| 753 if (err) { | |
| 754 (void) strcpy(da->failed, name); | |
| 755 return (err); | |
| 756 } | |
| 757 | |
| 758 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 759 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 760 return (0); |
| 761 } | |
| 762 | |
| 2199 | 763 /* |
| 764 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 765 */ | |
| 766 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 767 int | |
| 768 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 769 { | |
| 770 int err; | |
| 771 struct destroyarg da; | |
| 772 dsl_sync_task_t *dst; | |
| 773 spa_t *spa; | |
| 774 | |
|
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775 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 776 if (err) |
| 777 return (err); | |
| 778 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 779 da.snapname = snapname; | |
| 780 da.failed = fsname; | |
| 781 | |
| 782 err = dmu_objset_find(fsname, | |
| 2417 | 783 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 784 |
| 785 if (err == 0) | |
| 786 err = dsl_sync_task_group_wait(da.dstg); | |
| 787 | |
| 788 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 789 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 790 dsl_dataset_t *ds = dst->dst_arg1; | |
| 791 if (dst->dst_err) { | |
| 792 dsl_dataset_name(ds, fsname); | |
|
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793 *strchr(fsname, '@') = '\0'; |
| 2199 | 794 } |
| 795 /* | |
| 796 * If it was successful, destroy_sync would have | |
| 797 * closed the ds | |
| 798 */ | |
| 799 if (err) | |
| 4007 | 800 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 801 } |
| 802 | |
| 803 dsl_sync_task_group_destroy(da.dstg); | |
| 804 spa_close(spa, FTAG); | |
| 805 return (err); | |
| 806 } | |
| 807 | |
| 5367 | 808 /* |
| 809 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
| 810 * successful or not), ds will be closed and caller can no longer | |
| 811 * dereference it. | |
| 812 */ | |
| 789 | 813 int |
| 5367 | 814 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 815 { |
| 816 int err; | |
| 2199 | 817 dsl_sync_task_group_t *dstg; |
| 818 objset_t *os; | |
| 789 | 819 dsl_dir_t *dd; |
| 2199 | 820 uint64_t obj; |
| 821 | |
| 5367 | 822 if (ds->ds_open_refcount != DS_REF_MAX) { |
| 823 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
| 824 DS_MODE_EXCLUSIVE) == 0) { | |
| 825 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
| 826 return (EBUSY); | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 if (dsl_dataset_is_snapshot(ds)) { | |
| 2199 | 831 /* Destroying a snapshot is simpler */ |
| 832 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 833 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 834 ds, tag, 0); |
| 835 goto out; | |
| 2199 | 836 } |
| 837 | |
| 838 dd = ds->ds_dir; | |
| 789 | 839 |
| 2199 | 840 /* |
| 841 * Check for errors and mark this ds as inconsistent, in | |
| 842 * case we crash while freeing the objects. | |
| 843 */ | |
| 844 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 845 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 846 if (err) |
| 847 goto out; | |
| 848 | |
| 849 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 850 if (err) | |
| 851 goto out; | |
| 2199 | 852 |
| 853 /* | |
| 854 * remove the objects in open context, so that we won't | |
| 855 * have too much to do in syncing context. | |
| 856 */ | |
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857 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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858 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 859 dmu_tx_t *tx = dmu_tx_create(os); |
| 860 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 861 dmu_tx_hold_bonus(tx, obj); | |
| 862 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 863 if (err) { | |
| 864 /* | |
| 865 * Perhaps there is not enough disk | |
| 866 * space. Just deal with it from | |
| 867 * dsl_dataset_destroy_sync(). | |
| 868 */ | |
| 869 dmu_tx_abort(tx); | |
| 870 continue; | |
| 871 } | |
| 872 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 873 dmu_tx_commit(tx); | |
| 874 } | |
| 875 /* Make sure it's not dirty before we finish destroying it. */ | |
| 876 txg_wait_synced(dd->dd_pool, 0); | |
| 877 | |
| 878 dmu_objset_close(os); | |
| 879 if (err != ESRCH) | |
| 5367 | 880 goto out; |
| 2199 | 881 |
| 5367 | 882 if (ds->ds_user_ptr) { |
| 883 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 884 ds->ds_user_ptr = NULL; | |
| 885 } | |
| 886 | |
| 887 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 888 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 889 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 890 | |
| 1544 | 891 if (err) |
| 5367 | 892 goto out; |
| 789 | 893 |
| 2199 | 894 /* |
| 895 * Blow away the dsl_dir + head dataset. | |
| 896 */ | |
| 897 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 898 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 899 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 900 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 901 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 902 err = dsl_sync_task_group_wait(dstg); | |
| 903 dsl_sync_task_group_destroy(dstg); | |
| 904 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 5367 | 905 if (err) |
| 2199 | 906 dsl_dir_close(dd, FTAG); |
| 5367 | 907 out: |
| 908 if (err) | |
| 909 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
| 789 | 910 return (err); |
| 911 } | |
| 912 | |
| 913 int | |
| 5367 | 914 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 915 { |
|
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916 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 5367 | 917 |
| 2199 | 918 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 919 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 920 ds, &ost, 0)); |
| 789 | 921 } |
| 922 | |
| 923 void * | |
| 924 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 925 void *p, dsl_dataset_evict_func_t func) | |
| 926 { | |
| 927 void *old; | |
| 928 | |
| 929 mutex_enter(&ds->ds_lock); | |
| 930 old = ds->ds_user_ptr; | |
| 931 if (old == NULL) { | |
| 932 ds->ds_user_ptr = p; | |
| 933 ds->ds_user_evict_func = func; | |
| 934 } | |
| 935 mutex_exit(&ds->ds_lock); | |
| 936 return (old); | |
| 937 } | |
| 938 | |
| 939 void * | |
| 940 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 941 { | |
| 942 return (ds->ds_user_ptr); | |
| 943 } | |
| 944 | |
| 945 | |
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946 blkptr_t * |
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947 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 948 { |
|
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949 return (&ds->ds_phys->ds_bp); |
| 789 | 950 } |
| 951 | |
| 952 void | |
| 953 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 954 { | |
| 955 ASSERT(dmu_tx_is_syncing(tx)); | |
| 956 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 957 if (ds == NULL) { | |
| 958 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 959 } else { | |
| 960 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 961 ds->ds_phys->ds_bp = *bp; | |
| 962 } | |
| 963 } | |
| 964 | |
| 965 spa_t * | |
| 966 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 967 { | |
| 968 return (ds->ds_dir->dd_pool->dp_spa); | |
| 969 } | |
| 970 | |
| 971 void | |
| 972 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 973 { | |
| 974 dsl_pool_t *dp; | |
| 975 | |
| 976 if (ds == NULL) /* this is the meta-objset */ | |
| 977 return; | |
| 978 | |
| 979 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 980 |
| 981 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 982 panic("dirtying snapshot!"); | |
| 789 | 983 |
| 984 dp = ds->ds_dir->dd_pool; | |
| 985 | |
| 986 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 987 /* up the hold count until we can be written out */ | |
| 988 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 989 } | |
| 990 } | |
| 991 | |
|
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992 /* |
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993 * The unique space in the head dataset can be calculated by subtracting |
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994 * the space used in the most recent snapshot, that is still being used |
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995 * in this file system, from the space currently in use. To figure out |
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996 * the space in the most recent snapshot still in use, we need to take |
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997 * the total space used in the snapshot and subtract out the space that |
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998 * has been freed up since the snapshot was taken. |
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999 */ |
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1000 static void |
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1001 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1002 { |
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1003 uint64_t mrs_used; |
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1004 uint64_t dlused, dlcomp, dluncomp; |
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1005 |
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1006 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1007 |
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1008 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1009 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1010 else |
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1011 mrs_used = 0; |
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1012 |
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1013 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1014 &dluncomp)); |
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1015 |
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1016 ASSERT3U(dlused, <=, mrs_used); |
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1017 ds->ds_phys->ds_unique_bytes = |
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1018 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1019 |
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1020 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1021 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1022 SPA_VERSION_UNIQUE_ACCURATE) |
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1023 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1024 } |
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1025 |
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1026 static uint64_t |
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1027 dsl_dataset_unique(dsl_dataset_t *ds) |
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1028 { |
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1029 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1030 dsl_dataset_recalc_head_uniq(ds); |
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1031 |
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1032 return (ds->ds_phys->ds_unique_bytes); |
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1033 } |
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1034 |
| 789 | 1035 struct killarg { |
|
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1036 int64_t *usedp; |
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1037 int64_t *compressedp; |
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1038 int64_t *uncompressedp; |
| 789 | 1039 zio_t *zio; |
| 1040 dmu_tx_t *tx; | |
| 1041 }; | |
| 1042 | |
| 1043 static int | |
| 1044 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1045 { | |
| 1046 struct killarg *ka = arg; | |
| 1047 blkptr_t *bp = &bc->bc_blkptr; | |
| 1048 | |
| 1049 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1050 | |
| 1051 /* | |
| 1052 * Since this callback is not called concurrently, no lock is | |
| 1053 * needed on the accounting values. | |
| 1054 */ | |
| 2082 | 1055 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1056 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1057 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1058 /* XXX check for EIO? */ | |
| 1059 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1060 ARC_NOWAIT); | |
| 1061 return (0); | |
| 1062 } | |
| 1063 | |
| 1064 /* ARGSUSED */ | |
| 2199 | 1065 static int |
| 1066 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1067 { |
| 2199 | 1068 dsl_dataset_t *ds = arg1; |
| 5367 | 1069 dmu_objset_type_t *ost = arg2; |
| 789 | 1070 |
| 2199 | 1071 /* |
| 5367 | 1072 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1073 */ |
| 5367 | 1074 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1075 return (EINVAL); |
| 1076 | |
| 2199 | 1077 /* |
| 1078 * This must not be a snapshot. | |
| 1079 */ | |
| 1080 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1081 return (EINVAL); | |
| 789 | 1082 |
| 1083 /* | |
| 1084 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1085 * them. Try again. | |
| 1086 */ | |
| 2199 | 1087 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1088 return (EAGAIN); |
| 2199 | 1089 |
| 1090 return (0); | |
| 1091 } | |
| 789 | 1092 |
| 2199 | 1093 /* ARGSUSED */ |
| 1094 static void | |
| 4543 | 1095 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1096 { |
| 1097 dsl_dataset_t *ds = arg1; | |
| 5367 | 1098 dmu_objset_type_t *ost = arg2; |
| 2199 | 1099 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1100 |
| 1101 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1102 | |
|
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1103 /* |
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1104 * Before the roll back destroy the zil. |
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1105 */ |
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1106 if (ds->ds_user_ptr != NULL) { |
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1107 zil_rollback_destroy( |
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1108 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1109 |
| 1110 /* | |
| 1111 * We need to make sure that the objset_impl_t is reopened after | |
| 1112 * we do the rollback, otherwise it will have the wrong | |
| 1113 * objset_phys_t. Normally this would happen when this | |
| 1114 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
| 1115 * dataset to be immediately evicted. But when doing "zfs recv | |
| 1116 * -F", we reopen the objset before that, so that there is no | |
| 1117 * window where the dataset is closed and inconsistent. | |
| 1118 */ | |
| 1119 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1120 ds->ds_user_ptr = NULL; | |
|
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1121 } |
|
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1122 |
| 789 | 1123 /* Zero out the deadlist. */ |
| 1124 bplist_close(&ds->ds_deadlist); | |
| 1125 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1126 ds->ds_phys->ds_deadlist_obj = | |
| 1127 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1128 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1129 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1130 |
| 1131 { | |
| 1132 /* Free blkptrs that we gave birth to */ | |
| 1133 zio_t *zio; | |
|
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1134 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1135 struct killarg ka; |
| 1136 | |
| 1137 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1138 ZIO_FLAG_MUSTSUCCEED); | |
| 1139 ka.usedp = &used; | |
| 1140 ka.compressedp = &compressed; | |
| 1141 ka.uncompressedp = &uncompressed; | |
| 1142 ka.zio = zio; | |
| 1143 ka.tx = tx; | |
| 1144 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1145 ADVANCE_POST, kill_blkptr, &ka); | |
| 1146 (void) zio_wait(zio); | |
| 1147 | |
| 2199 | 1148 dsl_dir_diduse_space(ds->ds_dir, |
| 789 | 1149 -used, -compressed, -uncompressed, tx); |
| 1150 } | |
| 1151 | |
| 5367 | 1152 if (ds->ds_prev) { |
| 1153 /* Change our contents to that of the prev snapshot */ | |
| 1154 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1155 ds->ds_phys->ds_prev_snap_obj); | |
| 1156 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1157 ds->ds_phys->ds_used_bytes = | |
| 1158 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1159 ds->ds_phys->ds_compressed_bytes = | |
| 1160 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1161 ds->ds_phys->ds_uncompressed_bytes = | |
| 1162 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1163 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1164 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1165 |
| 5367 | 1166 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1167 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1168 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1169 } | |
| 1170 } else { | |
| 1171 /* Zero out our contents, recreate objset */ | |
| 1172 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1173 ds->ds_phys->ds_used_bytes = 0; | |
| 1174 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1175 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1176 ds->ds_phys->ds_flags = 0; | |
| 1177 ds->ds_phys->ds_unique_bytes = 0; | |
| 1178 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1179 &ds->ds_phys->ds_bp, *ost, tx); | |
|
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1180 } |
| 4543 | 1181 |
| 1182 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1183 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1184 } |
| 1185 | |
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1186 /* ARGSUSED */ |
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1187 static int |
| 2199 | 1188 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1189 { |
| 2199 | 1190 dsl_dataset_t *ds = arg1; |
| 5367 | 1191 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1192 uint64_t count; | |
| 1193 int err; | |
|
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1194 |
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1195 /* |
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1196 * Can't delete a head dataset if there are snapshots of it. |
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1197 * (Except if the only snapshots are from the branch we cloned |
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1198 * from.) |
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1199 */ |
|
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1200 if (ds->ds_prev != NULL && |
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1201 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
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1202 return (EINVAL); |
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1203 |
| 5367 | 1204 /* |
| 1205 * This is really a dsl_dir thing, but check it here so that | |
| 1206 * we'll be less likely to leave this dataset inconsistent & | |
| 1207 * nearly destroyed. | |
| 1208 */ | |
| 1209 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1210 if (err) | |
| 1211 return (err); | |
| 1212 if (count != 0) | |
| 1213 return (EEXIST); | |
| 1214 | |
|
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1215 return (0); |
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1216 } |
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1217 |
| 2199 | 1218 /* ARGSUSED */ |
| 1219 static void | |
| 4543 | 1220 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1221 { |
| 2199 | 1222 dsl_dataset_t *ds = arg1; |
| 4543 | 1223 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1224 |
| 2199 | 1225 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1226 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1227 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1228 |
| 1229 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1230 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1231 } |
| 789 | 1232 |
| 2199 | 1233 /* ARGSUSED */ |
| 5367 | 1234 int |
| 2199 | 1235 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1236 { | |
| 1237 dsl_dataset_t *ds = arg1; | |
| 789 | 1238 |
| 1239 /* Can't delete a branch point. */ | |
| 2199 | 1240 if (ds->ds_phys->ds_num_children > 1) |
| 1241 return (EEXIST); | |
| 789 | 1242 |
| 1243 /* | |
| 1244 * Can't delete a head dataset if there are snapshots of it. | |
| 1245 * (Except if the only snapshots are from the branch we cloned | |
| 1246 * from.) | |
| 1247 */ | |
| 1248 if (ds->ds_prev != NULL && | |
| 2199 | 1249 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1250 return (EINVAL); |
| 1251 | |
| 1252 /* | |
| 1253 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1254 * them. Try again. | |
| 1255 */ | |
| 2199 | 1256 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1257 return (EAGAIN); |
| 2199 | 1258 |
| 1259 /* XXX we should do some i/o error checking... */ | |
| 1260 return (0); | |
| 1261 } | |
| 1262 | |
| 5367 | 1263 void |
| 4543 | 1264 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1265 { |
| 1266 dsl_dataset_t *ds = arg1; | |
|
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1267 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1268 zio_t *zio; |
| 1269 int err; | |
| 1270 int after_branch_point = FALSE; | |
| 1271 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1272 objset_t *mos = dp->dp_meta_objset; | |
| 1273 dsl_dataset_t *ds_prev = NULL; | |
| 1274 uint64_t obj; | |
| 1275 | |
|
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1276 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1277 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1278 ASSERT(ds->ds_prev == NULL || | |
| 1279 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1280 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1281 | |
|
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1282 /* Remove our reservation */ |
|
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1283 if (ds->ds_reserved != 0) { |
|
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1284 uint64_t val = 0; |
|
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1285 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
|
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1286 ASSERT3U(ds->ds_reserved, ==, 0); |
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1287 } |
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1288 |
| 2199 | 1289 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1290 | |
| 1291 obj = ds->ds_object; | |
| 789 | 1292 |
| 1293 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1294 if (ds->ds_prev) { | |
| 1295 ds_prev = ds->ds_prev; | |
| 1296 } else { | |
| 2199 | 1297 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1298 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1299 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1300 } |
| 1301 after_branch_point = | |
| 1302 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1303 | |
| 1304 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1305 if (after_branch_point && | |
| 1306 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1307 /* This clone is toast. */ | |
| 1308 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1309 ds_prev->ds_phys->ds_num_children--; | |
| 1310 } else if (!after_branch_point) { | |
| 1311 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1312 ds->ds_phys->ds_next_snap_obj; | |
| 1313 } | |
| 1314 } | |
| 1315 | |
| 1316 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1317 | |
| 1318 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1319 blkptr_t bp; |
| 789 | 1320 dsl_dataset_t *ds_next; |
| 1321 uint64_t itor = 0; | |
|
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1322 uint64_t old_unique; |
| 789 | 1323 |
| 1324 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1325 | |
| 2199 | 1326 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1327 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1328 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1329 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1330 | |
|
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1331 old_unique = dsl_dataset_unique(ds_next); |
|
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1332 |
| 789 | 1333 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1334 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1335 ds->ds_phys->ds_prev_snap_obj; | |
| 1336 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1337 ds->ds_phys->ds_prev_snap_txg; | |
| 1338 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1339 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1340 | |
| 1341 /* | |
| 1342 * Transfer to our deadlist (which will become next's | |
| 1343 * new deadlist) any entries from next's current | |
| 1344 * deadlist which were born before prev, and free the | |
| 1345 * other entries. | |
| 1346 * | |
| 1347 * XXX we're doing this long task with the config lock held | |
| 1348 */ | |
| 1349 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1350 &bp) == 0) { | |
| 1351 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1352 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1353 &bp, tx)); | |
| 789 | 1354 if (ds_prev && !after_branch_point && |
| 1355 bp.blk_birth > | |
| 1356 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1357 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1358 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1359 } |
| 1360 } else { | |
| 2082 | 1361 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1362 compressed += BP_GET_PSIZE(&bp); |
| 1363 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1364 /* XXX check return value? */ | |
| 1365 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1366 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1367 } | |
| 1368 } | |
| 1369 | |
| 1370 /* free next's deadlist */ | |
| 1371 bplist_close(&ds_next->ds_deadlist); | |
| 1372 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1373 | |
| 1374 /* set next's deadlist to our deadlist */ | |
| 1375 ds_next->ds_phys->ds_deadlist_obj = | |
| 1376 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1377 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1378 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1379 ds->ds_phys->ds_deadlist_obj = 0; |
| 1380 | |
| 1381 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1382 /* | |
| 1383 * Update next's unique to include blocks which | |
| 1384 * were previously shared by only this snapshot | |
| 1385 * and it. Those blocks will be born after the | |
| 1386 * prev snap and before this snap, and will have | |
| 1387 * died after the next snap and before the one | |
| 1388 * after that (ie. be on the snap after next's | |
| 1389 * deadlist). | |
| 1390 * | |
| 1391 * XXX we're doing this long task with the | |
| 1392 * config lock held | |
| 1393 */ | |
| 1394 dsl_dataset_t *ds_after_next; | |
| 1395 | |
| 2199 | 1396 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1397 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1398 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1399 itor = 0; |
| 1400 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1401 &itor, &bp) == 0) { | |
| 1402 if (bp.blk_birth > | |
| 1403 ds->ds_phys->ds_prev_snap_txg && | |
| 1404 bp.blk_birth <= | |
| 1405 ds->ds_phys->ds_creation_txg) { | |
| 1406 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1407 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1408 } |
| 1409 } | |
| 1410 | |
| 1411 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1412 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1413 } else { | |
| 1414 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1415 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1416 ds_next); | |
| 1417 if (ds_prev) { | |
| 2199 | 1418 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1419 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1420 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1421 } else { |
| 1422 ds_next->ds_prev = NULL; | |
| 1423 } | |
|
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1424 |
|
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1425 dsl_dataset_recalc_head_uniq(ds_next); |
|
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1426 |
|
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1427 /* |
|
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1428 * Reduce the amount of our unconsmed refreservation |
|
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1429 * being charged to our parent by the amount of |
|
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1430 * new unique data we have gained. |
|
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1431 */ |
|
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1432 if (old_unique < ds_next->ds_reserved) { |
|
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|
1433 int64_t mrsdelta; |
|
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1434 uint64_t new_unique = |
|
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1435 ds_next->ds_phys->ds_unique_bytes; |
|
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1436 |
|
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1437 ASSERT(old_unique <= new_unique); |
|
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1438 mrsdelta = MIN(new_unique - old_unique, |
|
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1439 ds_next->ds_reserved - old_unique); |
|
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|
1440 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
|
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|
1441 0, 0, tx); |
|
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|
1442 } |
| 789 | 1443 } |
| 1444 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1445 | |
| 1446 /* | |
|
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1447 * NB: unique_bytes might not be accurate for the head objset. |
|
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1448 * Before SPA_VERSION 9, we didn't update its value when we |
|
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1449 * deleted the most recent snapshot. |
| 789 | 1450 */ |
| 1451 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1452 } else { | |
| 1453 /* | |
| 1454 * There's no next snapshot, so this is a head dataset. | |
| 1455 * Destroy the deadlist. Unless it's a clone, the | |
| 1456 * deadlist should be empty. (If it's a clone, it's | |
| 1457 * safe to ignore the deadlist contents.) | |
| 1458 */ | |
| 1459 struct killarg ka; | |
| 1460 | |
| 1461 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1462 bplist_close(&ds->ds_deadlist); | |
| 1463 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1464 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1465 | |
| 1466 /* | |
| 1467 * Free everything that we point to (that's born after | |
| 1468 * the previous snapshot, if we are a clone) | |
| 1469 * | |
| 1470 * XXX we're doing this long task with the config lock held | |
| 1471 */ | |
| 1472 ka.usedp = &used; | |
| 1473 ka.compressedp = &compressed; | |
| 1474 ka.uncompressedp = &uncompressed; | |
| 1475 ka.zio = zio; | |
| 1476 ka.tx = tx; | |
| 1477 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1478 ADVANCE_POST, kill_blkptr, &ka); | |
| 1479 ASSERT3U(err, ==, 0); | |
|
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1480 ASSERT(spa_version(dp->dp_spa) < |
|
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1481 SPA_VERSION_UNIQUE_ACCURATE || |
|
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1482 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1483 } |
| 1484 | |
| 1485 err = zio_wait(zio); | |
| 1486 ASSERT3U(err, ==, 0); | |
| 1487 | |
| 2199 | 1488 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1489 |
| 1490 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1491 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1492 ASSERT(err == 0); | |
| 1493 } | |
| 1494 | |
| 2199 | 1495 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1496 /* Erase the link in the dataset */ |
| 2199 | 1497 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1498 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1499 /* |
| 1500 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1501 * the dataset. | |
| 1502 */ | |
| 1503 } else { | |
| 1504 /* remove from snapshot namespace */ | |
| 1505 dsl_dataset_t *ds_head; | |
| 2199 | 1506 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1507 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1508 DS_MODE_NONE, FTAG, &ds_head)); |
|
2207
47efcb3433a7
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|
1509 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1510 #ifdef ZFS_DEBUG |
| 1511 { | |
| 1512 uint64_t val; | |
| 1513 err = zap_lookup(mos, | |
| 1514 ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1515 ds->ds_snapname, 8, 1, &val); |
| 789 | 1516 ASSERT3U(err, ==, 0); |
| 1517 ASSERT3U(val, ==, obj); | |
| 1518 } | |
| 1519 #endif | |
| 1520 err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1521 ds->ds_snapname, tx); |
| 789 | 1522 ASSERT(err == 0); |
| 1523 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1524 } | |
| 1525 | |
| 1526 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1527 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1528 | |
| 5094 | 1529 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1530 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1531 cr, "dataset = %llu", ds->ds_object); | |
| 1532 | |
| 2199 | 1533 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1534 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1535 |
| 2199 | 1536 } |
| 1537 | |
|
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1538 static int |
|
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1539 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
|
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1540 { |
|
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|
1541 uint64_t asize; |
|
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|
1542 |
|
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1543 if (!dmu_tx_is_syncing(tx)) |
|
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1544 return (0); |
|
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|
1545 |
|
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|
1546 /* |
|
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|
1547 * If there's an fs-only reservation, any blocks that might become |
|
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1548 * owned by the snapshot dataset must be accommodated by space |
|
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1549 * outside of the reservation. |
|
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|
1550 */ |
|
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|
1551 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1552 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
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1553 return (ENOSPC); |
|
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|
1554 |
|
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|
1555 /* |
|
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|
1556 * Propogate any reserved space for this snapshot to other |
|
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1557 * snapshot checks in this sync group. |
|
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|
1558 */ |
|
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1559 if (asize > 0) |
|
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1560 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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1561 |
|
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|
1562 return (0); |
|
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|
1563 } |
|
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1564 |
| 2199 | 1565 /* ARGSUSED */ |
| 1566 int | |
| 1567 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1568 { | |
| 5367 | 1569 dsl_dataset_t *ds = arg1; |
| 2199 | 1570 const char *snapname = arg2; |
| 1571 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1572 int err; | |
| 1573 uint64_t value; | |
| 789 | 1574 |
| 1575 /* | |
| 2199 | 1576 * We don't allow multiple snapshots of the same txg. If there |
| 1577 * is already one, try again. | |
| 1578 */ | |
| 1579 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1580 return (EAGAIN); | |
| 1581 | |
| 1582 /* | |
| 1583 * Check for conflicting name snapshot name. | |
| 789 | 1584 */ |
| 2199 | 1585 err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, |
| 1586 snapname, 8, 1, &value); | |
| 1587 if (err == 0) | |
| 1588 return (EEXIST); | |
| 1589 if (err != ENOENT) | |
| 1590 return (err); | |
| 789 | 1591 |
|
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1592 /* |
|
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1593 * Check that the dataset's name is not too long. Name consists |
|
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1594 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
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|
1595 */ |
|
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|
1596 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
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|
1597 return (ENAMETOOLONG); |
|
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|
1598 |
|
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1599 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
|
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1600 if (err) |
|
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|
1601 return (err); |
|
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1602 |
| 2199 | 1603 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1604 return (0); |
| 1605 } | |
| 1606 | |
| 2199 | 1607 void |
| 4543 | 1608 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1609 { |
| 5367 | 1610 dsl_dataset_t *ds = arg1; |
| 2199 | 1611 const char *snapname = arg2; |
| 1612 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1613 dmu_buf_t *dbuf; |
| 1614 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1615 uint64_t dsobj; |
| 789 | 1616 objset_t *mos = dp->dp_meta_objset; |
| 1617 int err; | |
| 1618 | |
| 1619 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1620 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1621 |
|
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1622 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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1623 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1624 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1625 dmu_buf_will_dirty(dbuf, tx); |
| 1626 dsphys = dbuf->db_data; | |
| 2199 | 1627 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1628 dsphys->ds_fsid_guid = unique_create(); |
| 1629 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1630 sizeof (dsphys->ds_guid)); | |
| 1631 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1632 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1633 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1634 dsphys->ds_num_children = 1; | |
| 1635 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1636 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1637 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1638 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1639 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1640 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1641 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1642 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1643 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1644 |
| 2199 | 1645 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1646 if (ds->ds_prev) { | |
| 1647 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1648 ds->ds_object || |
| 2199 | 1649 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1650 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1651 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1652 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1653 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1654 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1655 } |
| 1656 } | |
| 1657 | |
|
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1658 /* |
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1659 * If we have a reference-reservation on this dataset, we will |
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1660 * need to increase the amount of refreservation being charged |
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1661 * since our unique space is going to zero. |
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1662 */ |
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1663 if (ds->ds_reserved) { |
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1664 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1665 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
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1666 } |
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1667 |
| 789 | 1668 bplist_close(&ds->ds_deadlist); |
| 1669 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1670 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, dsphys->ds_creation_txg); | |
| 1671 ds->ds_phys->ds_prev_snap_obj = dsobj; | |
| 1672 ds->ds_phys->ds_prev_snap_txg = dsphys->ds_creation_txg; | |
| 1673 ds->ds_phys->ds_unique_bytes = 0; | |
|
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1674 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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1675 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1676 ds->ds_phys->ds_deadlist_obj = |
| 1677 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1678 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1679 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1680 |
| 1681 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1682 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1683 snapname, 8, 1, &dsobj, tx); | |
| 1684 ASSERT(err == 0); | |
| 1685 | |
| 1686 if (ds->ds_prev) | |
| 1687 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1688 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1689 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1690 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 4543 | 1691 |
| 1692 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
|
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1693 "dataset = %llu", dsobj); |
| 789 | 1694 } |
| 1695 | |
| 1696 void | |
|
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1697 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1698 { |
| 1699 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1700 ASSERT(ds->ds_user_ptr != NULL); | |
| 1701 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1702 | |
| 4787 | 1703 /* |
| 1704 * in case we had to change ds_fsid_guid when we opened it, | |
| 1705 * sync it out now. | |
| 1706 */ | |
| 1707 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1708 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1709 | |
| 789 | 1710 dsl_dir_dirty(ds->ds_dir, tx); |
|
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1711 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1712 } |
| 1713 | |
| 1714 void | |
| 2885 | 1715 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1716 { |
|
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1717 uint64_t refd, avail, uobjs, aobjs; |
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1718 |
| 2885 | 1719 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1720 |
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1721 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
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1722 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
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1723 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
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1724 |
| 2885 | 1725 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1726 ds->ds_phys->ds_creation_time); | |
| 1727 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1728 ds->ds_phys->ds_creation_txg); | |
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1729 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1730 ds->ds_quota); |
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1731 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1732 ds->ds_reserved); |
| 789 | 1733 |
| 1734 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1735 /* | |
| 1736 * This is a snapshot; override the dd's space used with | |
| 2885 | 1737 * our unique space and compression ratio. |
| 789 | 1738 */ |
| 2885 | 1739 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1740 ds->ds_phys->ds_unique_bytes); | |
| 1741 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1742 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1743 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1744 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1745 } |
| 1746 } | |
| 1747 | |
| 2885 | 1748 void |
| 1749 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1750 { |
| 2885 | 1751 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1752 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1753 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1754 if (ds->ds_phys->ds_next_snap_obj) { |
| 1755 stat->dds_is_snapshot = B_TRUE; | |
| 1756 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1757 } | |
| 1758 | |
| 1759 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1760 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1761 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1762 dsl_dataset_t *ods; |
| 1763 | |
| 1764 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 5367 | 1765 ds->ds_dir->dd_phys->dd_origin_obj, |
| 2885 | 1766 NULL, DS_MODE_NONE, FTAG, &ods)); |
| 5367 | 1767 dsl_dataset_name(ods, stat->dds_origin); |
| 2885 | 1768 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
| 1769 } | |
| 5446 | 1770 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1771 } |
| 1772 | |
| 1773 uint64_t | |
| 1774 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1775 { | |
| 4787 | 1776 return (ds->ds_fsid_guid); |
| 2885 | 1777 } |
| 1778 | |
| 1779 void | |
| 1780 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1781 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1782 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1783 { | |
| 1784 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1785 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
|
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1786 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1787 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1788 if (ds->ds_quota != 0) { |
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1789 /* |
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1790 * Adjust available bytes according to refquota |
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1791 */ |
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1792 if (*refdbytesp < ds->ds_quota) |
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1793 *availbytesp = MIN(*availbytesp, |
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1794 ds->ds_quota - *refdbytesp); |
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1795 else |
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1796 *availbytesp = 0; |
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1797 } |
| 2885 | 1798 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1799 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1800 } |
| 1801 | |
|
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1802 boolean_t |
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1803 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1804 { |
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1805 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1806 |
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1807 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1808 dsl_pool_sync_context(dp)); |
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1809 if (ds->ds_prev == NULL) |
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1810 return (B_FALSE); |
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1811 if (ds->ds_phys->ds_bp.blk_birth > |
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1812 ds->ds_prev->ds_phys->ds_creation_txg) |
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1813 return (B_TRUE); |
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1814 return (B_FALSE); |
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1815 } |
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1816 |
| 2199 | 1817 /* ARGSUSED */ |
| 789 | 1818 static int |
| 2199 | 1819 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1820 { |
| 2199 | 1821 dsl_dataset_t *ds = arg1; |
| 1822 char *newsnapname = arg2; | |
| 1823 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1824 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1825 dsl_dataset_t *hds; |
| 1826 uint64_t val; | |
| 789 | 1827 int err; |
| 1828 | |
| 2199 | 1829 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1830 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1831 if (err) |
| 1832 return (err); | |
| 1833 | |
| 2199 | 1834 /* new name better not be in use */ |
| 1835 err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1836 newsnapname, 8, 1, &val); | |
| 1837 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); | |
| 789 | 1838 |
| 2199 | 1839 if (err == 0) |
| 1840 err = EEXIST; | |
| 1841 else if (err == ENOENT) | |
| 1842 err = 0; | |
| 4007 | 1843 |
| 1844 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1845 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1846 err = ENAMETOOLONG; | |
| 1847 | |
| 2199 | 1848 return (err); |
| 1849 } | |
| 789 | 1850 |
| 2199 | 1851 static void |
| 4543 | 1852 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1853 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1854 { |
| 1855 dsl_dataset_t *ds = arg1; | |
| 4543 | 1856 const char *newsnapname = arg2; |
| 2199 | 1857 dsl_dir_t *dd = ds->ds_dir; |
| 1858 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1859 dsl_dataset_t *hds; | |
| 1860 int err; | |
| 789 | 1861 |
| 2199 | 1862 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1863 |
| 2199 | 1864 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1865 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1866 |
| 2199 | 1867 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 1868 err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1869 ds->ds_snapname, tx); | |
| 789 | 1870 ASSERT3U(err, ==, 0); |
| 2199 | 1871 mutex_enter(&ds->ds_lock); |
| 1872 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1873 mutex_exit(&ds->ds_lock); | |
| 1874 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1875 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1876 ASSERT3U(err, ==, 0); |
| 1877 | |
| 4543 | 1878 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 1879 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1880 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1881 } |
| 1882 | |
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1883 struct renamesnaparg { |
| 4007 | 1884 dsl_sync_task_group_t *dstg; |
| 1885 char failed[MAXPATHLEN]; | |
| 1886 char *oldsnap; | |
| 1887 char *newsnap; | |
| 1888 }; | |
| 1889 | |
| 1890 static int | |
| 1891 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1892 { | |
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1893 struct renamesnaparg *ra = arg; |
| 4007 | 1894 dsl_dataset_t *ds = NULL; |
| 1895 char *cp; | |
| 1896 int err; | |
| 1897 | |
| 1898 cp = name + strlen(name); | |
| 1899 *cp = '@'; | |
| 1900 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 1901 |
| 1902 /* | |
| 1903 * For recursive snapshot renames the parent won't be changing | |
| 1904 * so we just pass name for both the to/from argument. | |
| 1905 */ | |
| 1906 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 1907 (void) strcpy(ra->failed, name); | |
| 1908 return (err); | |
| 1909 } | |
| 1910 | |
| 4007 | 1911 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
| 1912 ra->dstg, &ds); | |
| 1913 if (err == ENOENT) { | |
| 1914 *cp = '\0'; | |
| 1915 return (0); | |
| 1916 } | |
| 1917 if (err) { | |
| 1918 (void) strcpy(ra->failed, name); | |
| 1919 *cp = '\0'; | |
| 1920 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1921 return (err); | |
| 1922 } | |
| 1923 | |
| 1924 #ifdef _KERNEL | |
| 1925 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1926 (void) zfs_unmount_snap(name, NULL); | |
| 1927 #endif | |
| 1928 | |
| 1929 *cp = '\0'; | |
| 1930 | |
| 1931 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1932 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1933 | |
| 1934 return (0); | |
| 1935 } | |
| 1936 | |
| 1937 static int | |
| 1938 dsl_recursive_rename(char *oldname, const char *newname) | |
| 1939 { | |
| 1940 int err; | |
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1941 struct renamesnaparg *ra; |
| 4007 | 1942 dsl_sync_task_t *dst; |
| 1943 spa_t *spa; | |
| 1944 char *cp, *fsname = spa_strdup(oldname); | |
| 1945 int len = strlen(oldname); | |
| 1946 | |
| 1947 /* truncate the snapshot name to get the fsname */ | |
| 1948 cp = strchr(fsname, '@'); | |
| 1949 *cp = '\0'; | |
| 1950 | |
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1951 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 1952 if (err) { |
| 1953 kmem_free(fsname, len + 1); | |
| 1954 return (err); | |
| 1955 } | |
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1956 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 1957 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 1958 | |
| 1959 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 1960 ra->newsnap = strchr(newname, '@') + 1; | |
| 1961 *ra->failed = '\0'; | |
| 1962 | |
| 1963 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 1964 DS_FIND_CHILDREN); | |
| 1965 kmem_free(fsname, len + 1); | |
| 1966 | |
| 1967 if (err == 0) { | |
| 1968 err = dsl_sync_task_group_wait(ra->dstg); | |
| 1969 } | |
| 1970 | |
| 1971 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 1972 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 1973 dsl_dataset_t *ds = dst->dst_arg1; | |
| 1974 if (dst->dst_err) { | |
| 1975 dsl_dir_name(ds->ds_dir, ra->failed); | |
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1976 (void) strcat(ra->failed, "@"); |
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1977 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 1978 } |
| 1979 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1980 } | |
| 1981 | |
| 4543 | 1982 if (err) |
| 1983 (void) strcpy(oldname, ra->failed); | |
| 4007 | 1984 |
| 1985 dsl_sync_task_group_destroy(ra->dstg); | |
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1986 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 1987 spa_close(spa, FTAG); |
| 1988 return (err); | |
| 1989 } | |
| 1990 | |
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1991 static int |
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1992 dsl_valid_rename(char *oldname, void *arg) |
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1993 { |
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1994 int delta = *(int *)arg; |
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1995 |
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1996 if (strlen(oldname) + delta >= MAXNAMELEN) |
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1997 return (ENAMETOOLONG); |
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1998 |
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1999 return (0); |
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2000 } |
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2001 |
| 789 | 2002 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2003 int | |
| 4007 | 2004 dsl_dataset_rename(char *oldname, const char *newname, |
| 2005 boolean_t recursive) | |
| 789 | 2006 { |
| 2007 dsl_dir_t *dd; | |
| 2199 | 2008 dsl_dataset_t *ds; |
| 789 | 2009 const char *tail; |
| 2010 int err; | |
| 2011 | |
| 2199 | 2012 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2013 if (err) |
| 2014 return (err); | |
| 789 | 2015 if (tail == NULL) { |
|
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2016 int delta = strlen(newname) - strlen(oldname); |
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2017 |
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2018 /* if we're growing, validate child size lengths */ |
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2019 if (delta > 0) |
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2020 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2021 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2022 |
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2023 if (!err) |
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2024 err = dsl_dir_rename(dd, newname); |
| 789 | 2025 dsl_dir_close(dd, FTAG); |
| 2026 return (err); | |
| 2027 } | |
| 2028 if (tail[0] != '@') { | |
| 2029 /* the name ended in a nonexistant component */ | |
| 2030 dsl_dir_close(dd, FTAG); | |
| 2031 return (ENOENT); | |
| 2032 } | |
| 2033 | |
| 2199 | 2034 dsl_dir_close(dd, FTAG); |
| 2035 | |
| 2036 /* new name must be snapshot in same filesystem */ | |
| 2037 tail = strchr(newname, '@'); | |
| 2038 if (tail == NULL) | |
| 2039 return (EINVAL); | |
| 2040 tail++; | |
| 2041 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2042 return (EXDEV); | |
| 789 | 2043 |
| 4007 | 2044 if (recursive) { |
| 2045 err = dsl_recursive_rename(oldname, newname); | |
| 2046 } else { | |
| 2047 err = dsl_dataset_open(oldname, | |
| 2048 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 2049 if (err) | |
| 2050 return (err); | |
| 2199 | 2051 |
| 4007 | 2052 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2053 dsl_dataset_snapshot_rename_check, | |
| 2054 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2055 |
| 4007 | 2056 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 2057 } | |
| 2199 | 2058 |
| 789 | 2059 return (err); |
| 2060 } | |
| 2082 | 2061 |
| 2199 | 2062 struct promotearg { |
| 2063 uint64_t used, comp, uncomp, unique; | |
| 2064 uint64_t newnext_obj, snapnames_obj; | |
| 2065 }; | |
| 2066 | |
| 4543 | 2067 /* ARGSUSED */ |
| 2082 | 2068 static int |
| 2199 | 2069 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2070 { |
| 2199 | 2071 dsl_dataset_t *hds = arg1; |
| 2072 struct promotearg *pa = arg2; | |
| 2073 dsl_dir_t *dd = hds->ds_dir; | |
| 2074 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2075 dsl_dir_t *odd = NULL; |
| 2082 | 2076 dsl_dataset_t *ds = NULL; |
| 5367 | 2077 dsl_dataset_t *origin_ds = NULL; |
| 2082 | 2078 dsl_dataset_t *newnext_ds = NULL; |
| 2079 int err; | |
| 2080 char *name = NULL; | |
| 2199 | 2081 uint64_t itor = 0; |
| 2082 | 2082 blkptr_t bp; |
| 2083 | |
| 2199 | 2084 bzero(pa, sizeof (*pa)); |
| 2085 | |
| 2082 | 2086 /* Check that it is a clone */ |
| 5367 | 2087 if (dd->dd_phys->dd_origin_obj == 0) |
| 2082 | 2088 return (EINVAL); |
| 2089 | |
| 2199 | 2090 /* Since this is so expensive, don't do the preliminary check */ |
| 2091 if (!dmu_tx_is_syncing(tx)) | |
| 2092 return (0); | |
| 2093 | |
| 5367 | 2094 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2095 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
| 2082 | 2096 goto out; |
| 5367 | 2097 odd = origin_ds->ds_dir; |
| 2199 | 2098 |
| 2099 { | |
| 2100 dsl_dataset_t *phds; | |
| 2101 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 5367 | 2102 odd->dd_phys->dd_head_dataset_obj, |
| 2199 | 2103 NULL, DS_MODE_NONE, FTAG, &phds)) |
| 2104 goto out; | |
| 2105 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; | |
| 2106 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 2107 } | |
| 2082 | 2108 |
| 2109 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 2110 err = EXDEV; | |
| 2111 goto out; | |
| 2112 } | |
| 2113 | |
| 5367 | 2114 /* find origin's new next ds */ |
| 2082 | 2115 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
| 2116 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 5367 | 2117 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2118 dsl_dataset_t *prev; |
| 2119 | |
| 2120 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 2121 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 2122 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 2123 goto out; |
| 2124 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2125 newnext_ds = prev; | |
| 2126 } | |
| 2199 | 2127 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2128 |
| 5367 | 2129 /* compute origin's new unique space */ |
| 2082 | 2130 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2131 &itor, &bp)) == 0) { | |
| 5367 | 2132 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
| 2199 | 2133 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 2134 } |
| 2135 if (err != ENOENT) | |
| 2136 goto out; | |
| 2137 | |
| 2138 /* Walk the snapshots that we are moving */ | |
| 2139 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 5367 | 2140 ds = origin_ds; |
| 2082 | 2141 /* CONSTCOND */ |
| 2142 while (TRUE) { | |
| 2143 uint64_t val, dlused, dlcomp, dluncomp; | |
| 2144 dsl_dataset_t *prev; | |
| 2145 | |
| 2146 /* Check that the snapshot name does not conflict */ | |
| 2147 dsl_dataset_name(ds, name); | |
| 2148 err = zap_lookup(dd->dd_pool->dp_meta_objset, | |
| 2149 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, | |
| 2150 8, 1, &val); | |
| 2151 if (err != ENOENT) { | |
| 2152 if (err == 0) | |
| 2153 err = EEXIST; | |
| 2154 goto out; | |
| 2155 } | |
| 2156 | |
| 2157 /* | |
| 2158 * compute space to transfer. Each snapshot gave birth to: | |
| 2159 * (my used) - (prev's used) + (deadlist's used) | |
| 2160 */ | |
| 2199 | 2161 pa->used += ds->ds_phys->ds_used_bytes; |
| 2162 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 2163 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2164 |
| 2165 /* If we reach the first snapshot, we're done. */ | |
| 2166 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2167 break; | |
| 2168 | |
| 2169 if (err = bplist_space(&ds->ds_deadlist, | |
| 2170 &dlused, &dlcomp, &dluncomp)) | |
| 2171 goto out; | |
| 2172 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2173 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 2174 FTAG, &prev)) | |
| 2175 goto out; | |
| 2199 | 2176 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 2177 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 2178 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2179 |
| 2180 /* | |
| 2181 * We could be a clone of a clone. If we reach our | |
| 2182 * parent's branch point, we're done. | |
| 2183 */ | |
| 2184 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2185 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2186 break; | |
| 2187 } | |
| 5367 | 2188 if (ds != origin_ds) |
| 2082 | 2189 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2190 ds = prev; | |
| 2191 } | |
| 2192 | |
| 2193 /* Check that there is enough space here */ | |
| 5367 | 2194 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
| 2199 | 2195 |
| 2196 out: | |
| 5367 | 2197 if (ds && ds != origin_ds) |
| 2199 | 2198 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 5367 | 2199 if (origin_ds) |
| 2200 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2201 if (newnext_ds) |
| 2202 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2203 if (name) | |
| 2204 kmem_free(name, MAXPATHLEN); | |
| 2205 return (err); | |
| 2206 } | |
| 2082 | 2207 |
| 2199 | 2208 static void |
| 4543 | 2209 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2210 { |
| 2211 dsl_dataset_t *hds = arg1; | |
| 2212 struct promotearg *pa = arg2; | |
| 2213 dsl_dir_t *dd = hds->ds_dir; | |
| 2214 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2215 dsl_dir_t *odd = NULL; |
| 2216 dsl_dataset_t *ds, *origin_ds; | |
| 2199 | 2217 char *name; |
| 2218 | |
| 5367 | 2219 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
| 2199 | 2220 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
| 2221 | |
| 5367 | 2222 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2223 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
| 2417 | 2224 /* |
| 5367 | 2225 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2226 * changing. |
| 2227 */ | |
| 5367 | 2228 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2229 NULL, FTAG, &odd)); | |
| 2082 | 2230 |
| 2231 /* move snapshots to this dir */ | |
| 2199 | 2232 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 5367 | 2233 ds = origin_ds; |
| 2082 | 2234 /* CONSTCOND */ |
| 2235 while (TRUE) { | |
| 2236 dsl_dataset_t *prev; | |
| 2237 | |
| 2238 /* move snap name entry */ | |
| 2239 dsl_dataset_name(ds, name); | |
| 2199 | 2240 VERIFY(0 == zap_remove(dp->dp_meta_objset, |
| 2241 pa->snapnames_obj, ds->ds_snapname, tx)); | |
| 2242 VERIFY(0 == zap_add(dp->dp_meta_objset, | |
| 2082 | 2243 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2244 8, 1, &ds->ds_object, tx)); | |
| 2245 | |
| 2246 /* change containing dsl_dir */ | |
| 2247 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2248 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2249 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2250 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2251 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2252 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2253 NULL, ds, &ds->ds_dir)); |
| 2254 | |
| 2255 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 2256 | |
| 2257 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2258 break; | |
| 2259 | |
| 2199 | 2260 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 2261 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 2262 FTAG, &prev)); | |
| 2263 | |
| 2264 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2265 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2266 break; | |
| 2267 } | |
| 5367 | 2268 if (ds != origin_ds) |
| 2082 | 2269 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2270 ds = prev; | |
| 2271 } | |
| 5367 | 2272 if (ds != origin_ds) |
| 2199 | 2273 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2082 | 2274 |
| 5367 | 2275 /* change origin's next snap */ |
| 2276 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
| 2277 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
| 2082 | 2278 |
| 5367 | 2279 /* change origin */ |
| 2082 | 2280 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 2281 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
| 2282 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
| 2283 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
| 2284 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
| 2082 | 2285 |
| 2286 /* change space accounting */ | |
| 5367 | 2287 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2288 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2289 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2290 |
| 4543 | 2291 /* log history record */ |
| 2292 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
| 2293 cr, "dataset = %llu", ds->ds_object); | |
| 2294 | |
| 5367 | 2295 dsl_dir_close(odd, FTAG); |
| 2296 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2297 kmem_free(name, MAXPATHLEN); |
| 2082 | 2298 } |
| 2299 | |
| 2300 int | |
| 2301 dsl_dataset_promote(const char *name) | |
| 2302 { | |
| 2303 dsl_dataset_t *ds; | |
| 2304 int err; | |
| 2305 dmu_object_info_t doi; | |
| 2199 | 2306 struct promotearg pa; |
| 2082 | 2307 |
| 2308 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 2309 if (err) | |
| 2310 return (err); | |
| 2311 | |
| 2312 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 2313 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 2314 if (err) { | |
| 2315 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2316 return (err); | |
| 2317 } | |
| 2318 | |
| 2319 /* | |
| 2320 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 2321 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2322 * bonus buffers. | |
| 2323 */ | |
| 2199 | 2324 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2325 dsl_dataset_promote_check, | |
| 2326 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2327 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2328 return (err); | |
| 2329 } | |
| 3912 | 2330 |
| 5367 | 2331 struct cloneswaparg { |
| 2332 dsl_dataset_t *cds; /* clone dataset */ | |
| 2333 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2334 boolean_t force; | |
| 2335 }; | |
|
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2336 |
|
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|
2337 /* ARGSUSED */ |
|
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|
2338 static int |
|
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|
2339 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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|
2340 { |
| 5367 | 2341 struct cloneswaparg *csa = arg1; |
|
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|
2342 |
|
5383
26d61472aeae
6623843 dsl_dataset_clone_swap_sync shouldn't panic when there's a refreservation
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|
2343 if (csa->ohds->ds_reserved != 0) |
|
26d61472aeae
6623843 dsl_dataset_clone_swap_sync shouldn't panic when there's a refreservation
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|
2344 return (EINVAL); |
|
26d61472aeae
6623843 dsl_dataset_clone_swap_sync shouldn't panic when there's a refreservation
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|
2345 |
| 5367 | 2346 /* they should both be heads */ |
| 2347 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2348 dsl_dataset_is_snapshot(csa->ohds)) | |
|
5326
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|
2349 return (EINVAL); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2350 |
| 5367 | 2351 /* the branch point should be just before them */ |
| 2352 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
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|
2353 return (EINVAL); |
|
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6425096 want online 'zfs recv' (read only and read/write)
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|
2354 |
| 5367 | 2355 /* cds should be the clone */ |
| 2356 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2357 csa->ohds->ds_object) | |
| 2358 return (EINVAL); | |
|
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|
2359 |
| 5367 | 2360 /* the clone should be a child of the origin */ |
| 2361 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2362 return (EINVAL); | |
|
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|
2363 |
| 5367 | 2364 /* ohds shouldn't be modified unless 'force' */ |
| 2365 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2366 return (ETXTBSY); | |
| 2367 return (0); | |
|
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|
2368 } |
|
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|
2369 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2370 /* ARGSUSED */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2371 static void |
|
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|
2372 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
6752aa2bd5bc
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|
2373 { |
| 5367 | 2374 struct cloneswaparg *csa = arg1; |
| 2375 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
5326
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|
2376 uint64_t itor = 0; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
2377 blkptr_t bp; |
|
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|
2378 uint64_t unique = 0; |
|
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|
2379 int err; |
|
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|
2380 |
| 5367 | 2381 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2382 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2383 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
|
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|
2384 |
| 5367 | 2385 if (csa->cds->ds_user_ptr != NULL) { |
| 2386 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2387 csa->cds->ds_user_ptr = NULL; | |
| 2388 } | |
|
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|
2389 |
| 5367 | 2390 if (csa->ohds->ds_user_ptr != NULL) { |
| 2391 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2392 csa->ohds->ds_user_ptr); | |
| 2393 csa->ohds->ds_user_ptr = NULL; | |
| 2394 } | |
|
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|
2395 |
|
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|
2396 /* compute unique space */ |
| 5367 | 2397 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2398 &itor, &bp)) == 0) { | |
| 2399 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2400 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
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|
2401 } |
|
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|
2402 VERIFY(err == ENOENT); |
|
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|
2403 |
|
5378
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|
2404 /* undo any accounting due to a refreservation */ |
|
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|
2405 if (csa->ohds->ds_reserved > csa->ohds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2406 dsl_dir_diduse_space(csa->ohds->ds_dir, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2407 csa->ohds->ds_phys->ds_unique_bytes - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2408 csa->ohds->ds_reserved, 0, 0, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2409 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2410 |
|
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|
2411 /* reset origin's unique bytes */ |
| 5367 | 2412 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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|
2413 |
|
6752aa2bd5bc
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|
2414 /* swap blkptrs */ |
|
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|
2415 { |
|
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|
2416 blkptr_t tmp; |
| 5367 | 2417 tmp = csa->ohds->ds_phys->ds_bp; |
| 2418 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2419 csa->cds->ds_phys->ds_bp = tmp; | |
|
5326
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|
2420 } |
|
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|
2421 |
|
6752aa2bd5bc
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|
2422 /* set dd_*_bytes */ |
|
6752aa2bd5bc
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|
2423 { |
|
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|
2424 int64_t dused, dcomp, duncomp; |
|
6752aa2bd5bc
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|
2425 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
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|
2426 uint64_t odl_used, odl_comp, odl_uncomp; |
|
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|
2427 |
| 5367 | 2428 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
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|
2429 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2430 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
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|
2431 &odl_comp, &odl_uncomp)); |
| 5367 | 2432 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2433 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2434 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2435 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2436 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2437 cdl_uncomp - | |
| 2438 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
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|
2439 |
| 5367 | 2440 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2441 dused, dcomp, duncomp, tx); | |
| 2442 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2443 -dused, -dcomp, -duncomp, tx); | |
| 2444 } | |
| 2445 | |
| 2446 #define SWITCH64(x, y) \ | |
| 2447 { \ | |
| 2448 uint64_t __tmp = (x); \ | |
| 2449 (x) = (y); \ | |
| 2450 (y) = __tmp; \ | |
|
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|
2451 } |
|
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|
2452 |
|
5378
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|
2453 /* redo any accounting due to a refreservation */ |
|
111aa1baa84a
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|
2454 if (csa->ohds->ds_reserved > csa->ohds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2455 dsl_dir_diduse_space(csa->ohds->ds_dir, |
|
111aa1baa84a
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|
2456 csa->ohds->ds_reserved - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2457 csa->ohds->ds_phys->ds_unique_bytes, 0, 0, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2458 } |
|
111aa1baa84a
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|
2459 |
|
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|
2460 /* swap ds_*_bytes */ |
| 5367 | 2461 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2462 csa->cds->ds_phys->ds_used_bytes); | |
| 2463 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2464 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2465 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2466 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
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|
2467 |
|
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|
2468 /* swap deadlists */ |
| 5367 | 2469 bplist_close(&csa->cds->ds_deadlist); |
| 2470 bplist_close(&csa->ohds->ds_deadlist); | |
| 2471 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2472 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2473 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2474 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2475 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2476 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5378
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|
2477 /* fix up clone's unique */ |
|
111aa1baa84a
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changeset
|
2478 dsl_dataset_recalc_head_uniq(csa->cds); |
|
111aa1baa84a
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|
2479 |
|
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|
2480 } |
|
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|
2481 |
|
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|
2482 /* |
|
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changeset
|
2483 * Swap the clone "cosname" with its origin head file system. |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2484 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2485 int |
| 5367 | 2486 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2487 boolean_t force) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2488 { |
| 5367 | 2489 struct cloneswaparg csa; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2490 |
| 5367 | 2491 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
| 2492 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
|
2493 |
| 5367 | 2494 csa.cds = clone; |
| 2495 csa.ohds = origin_head; | |
| 2496 csa.force = force; | |
| 2497 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
|
2498 dsl_dataset_clone_swap_check, |
| 5367 | 2499 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
|
2500 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2501 |
| 3912 | 2502 /* |
| 2503 * Given a pool name and a dataset object number in that pool, | |
| 2504 * return the name of that dataset. | |
| 2505 */ | |
| 2506 int | |
| 2507 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2508 { | |
| 2509 spa_t *spa; | |
| 2510 dsl_pool_t *dp; | |
| 2511 dsl_dataset_t *ds = NULL; | |
| 2512 int error; | |
| 2513 | |
| 2514 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2515 return (error); | |
| 2516 dp = spa_get_dsl(spa); | |
| 2517 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2518 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2519 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2520 rw_exit(&dp->dp_config_rwlock); | |
| 2521 spa_close(spa, FTAG); | |
| 2522 return (error); | |
| 2523 } | |
| 2524 dsl_dataset_name(ds, buf); | |
| 2525 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2526 rw_exit(&dp->dp_config_rwlock); | |
| 2527 spa_close(spa, FTAG); | |
| 2528 | |
| 2529 return (0); | |
| 2530 } | |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2531 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2532 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2533 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2534 uint64_t asize, uint64_t inflight, uint64_t *used) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2535 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2536 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2537 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2538 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2539 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2540 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2541 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2542 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2543 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2544 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
|
2545 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2546 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2547 *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
|
2548 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2549 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2550 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2551 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2552 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2553 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2554 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2555 * 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
|
2556 * 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
|
2557 * 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
|
2558 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2559 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2560 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
|
2561 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
|
2562 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2563 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2564 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2565 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2566 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2567 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2568 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2569 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2570 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2571 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2572 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2573 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
|
2574 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2575 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2576 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2577 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2578 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2579 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
|
2580 return (ENOTSUP); |
|
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 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2583 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2584 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2585 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2586 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2587 return (ENOSPC); |
|
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
parents:
5367
diff
changeset
|
2589 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2590 } |
|
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 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2593 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2594 dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2595 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2596 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2597 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2598 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2599 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2600 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2601 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2602 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2603 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2604 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2605 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2606 dsl_prop_set_uint64_sync(ds->ds_dir, "refquota", new_quota, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2607 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2608 spa_history_internal_log(LOG_DS_REFQUOTA, ds->ds_dir->dd_pool->dp_spa, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2609 tx, cr, "%lld dataset = %llu ", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2610 (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
|
2611 } |
|
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 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2614 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
|
2615 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2616 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2617 int err; |
|
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 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
|
2620 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2621 return (err); |
|
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 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2624 * If someone removes a file, then tries to set the quota, we |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2625 * want to make sure the file freeing takes effect. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2626 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2627 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2628 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2629 err = dsl_sync_task_do(ds->ds_dir->dd_pool, dsl_dataset_set_quota_check, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2630 dsl_dataset_set_quota_sync, ds, "a, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2631 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2632 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2633 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2634 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2635 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2636 dsl_dataset_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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|
2637 { |
|
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|
2638 dsl_dataset_t *ds = arg1; |
|
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2639 uint64_t *reservationp = arg2; |
|
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2640 uint64_t new_reservation = *reservationp; |
|
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|
2641 int64_t delta; |
|
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|
2642 uint64_t unique; |
|
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|
2643 |
|
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2644 if (new_reservation > INT64_MAX) |
|
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|
2645 return (EOVERFLOW); |
|
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|
2646 |
|
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2647 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < |
|
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2648 SPA_VERSION_REFRESERVATION) |
|
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|
2649 return (ENOTSUP); |
|
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|
2650 |
|
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|
2651 if (dsl_dataset_is_snapshot(ds)) |
|
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|
2652 return (EINVAL); |
|
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|
2653 |
|
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|
2654 /* |
|
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2655 * If we are doing the preliminary check in open context, the |
|
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2656 * space estimates may be inaccurate. |
|
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|
2657 */ |
|
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2658 if (!dmu_tx_is_syncing(tx)) |
|
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2659 return (0); |
|
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|
2660 |
|
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2661 mutex_enter(&ds->ds_lock); |
|
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2662 unique = dsl_dataset_unique(ds); |
|
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2663 delta = MAX(unique, new_reservation) - MAX(unique, ds->ds_reserved); |
|
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2664 mutex_exit(&ds->ds_lock); |
|
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2665 |
|
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2666 if (delta > 0 && |
|
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2667 delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
|
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2668 return (ENOSPC); |
|
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2669 if (delta > 0 && ds->ds_quota > 0 && |
|
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|
2670 new_reservation > ds->ds_quota) |
|
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|
2671 return (ENOSPC); |
|
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|
2672 |
|
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|
2673 return (0); |
|
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|
2674 } |
|
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|
2675 |
|
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|
2676 /* ARGSUSED */ |
|
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|
2677 static void |
|
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|
2678 dsl_dataset_set_reservation_sync(void *arg1, void *arg2, cred_t *cr, |
|
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|
2679 dmu_tx_t *tx) |
|
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|
2680 { |
|
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|
2681 dsl_dataset_t *ds = arg1; |
|
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|
2682 uint64_t *reservationp = arg2; |
|
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|
2683 uint64_t new_reservation = *reservationp; |
|
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|
2684 uint64_t unique; |
|
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|
2685 int64_t delta; |
|
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|
2686 |
|
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|
2687 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
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|
2688 |
|
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|
2689 mutex_enter(&ds->ds_lock); |
|
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|
2690 unique = dsl_dataset_unique(ds); |
|
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|
2691 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
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|
2692 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
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|
2693 ds->ds_reserved = new_reservation; |
|
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|
2694 mutex_exit(&ds->ds_lock); |
|
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|
2695 |
|
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|
2696 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
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|
2697 new_reservation, cr, tx); |
|
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|
2698 |
|
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|
2699 dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); |
|
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|
2700 |
|
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|
2701 spa_history_internal_log(LOG_DS_REFRESERV, |
|
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|
2702 ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", |
|
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2703 (longlong_t)new_reservation, |
|
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|
2704 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
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|
2705 } |
|
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|
2706 |
|
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|
2707 int |
|
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|
2708 dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) |
|
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|
2709 { |
|
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|
2710 dsl_dataset_t *ds; |
|
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|
2711 int err; |
|
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|
2712 |
|
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|
2713 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
|
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|
2714 if (err) |
|
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|
2715 return (err); |
|
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|
2716 |
|
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|
2717 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
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|
2718 dsl_dataset_set_reservation_check, |
|
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|
2719 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
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|
2720 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
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|
2721 return (err); |
|
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|
2722 } |