Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 4009:1a9b4fbc0d2a
6479884 want 'zfs rename -r' to recursively rename snapshots (fix lint)
| author | mmusante |
|---|---|
| date | Wed, 11 Apr 2007 10:23:43 -0700 |
| parents | c6f5c6753018 |
| children | 12bb2876a62e |
| 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 /* | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
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> |
| 789 | 41 |
| 2199 | 42 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
| 43 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
| 44 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
| 45 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
| 46 static dsl_checkfunc_t dsl_dataset_destroy_check; | |
| 47 static dsl_syncfunc_t dsl_dataset_destroy_sync; | |
|
1731
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
48 |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
49 #define DS_REF_MAX (1ULL << 62) |
| 789 | 50 |
| 51 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
| 52 | |
| 53 /* | |
| 54 * We use weighted reference counts to express the various forms of exclusion | |
| 55 * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
56 * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. |
| 789 | 57 * This makes the exclusion logic simple: the total refcnt for all opens cannot |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
58 * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their |
|
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
59 * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume |
| 789 | 60 * just over half of the refcnt space, so there can't be more than one, but it |
| 61 * can peacefully coexist with any number of STANDARD opens. | |
| 62 */ | |
| 63 static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
64 0, /* DS_MODE_NONE - invalid */ |
|
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
65 1, /* DS_MODE_STANDARD - unlimited number */ |
|
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
66 (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ |
|
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
67 DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ |
| 789 | 68 }; |
| 69 | |
| 70 | |
| 71 void | |
| 72 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 73 { | |
| 2082 | 74 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 75 int compressed = BP_GET_PSIZE(bp); |
| 76 int uncompressed = BP_GET_UCSIZE(bp); | |
| 77 | |
| 78 dprintf_bp(bp, "born, ds=%p\n", ds); | |
| 79 | |
| 80 ASSERT(dmu_tx_is_syncing(tx)); | |
| 81 /* It could have been compressed away to nothing */ | |
| 82 if (BP_IS_HOLE(bp)) | |
| 83 return; | |
| 84 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
| 85 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
| 86 if (ds == NULL) { | |
| 87 /* | |
| 88 * Account for the meta-objset space in its placeholder | |
| 89 * dsl_dir. | |
| 90 */ | |
| 91 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
| 92 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 93 used, compressed, uncompressed, tx); | |
| 94 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 95 return; | |
| 96 } | |
| 97 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 98 mutex_enter(&ds->ds_lock); | |
| 99 ds->ds_phys->ds_used_bytes += used; | |
| 100 ds->ds_phys->ds_compressed_bytes += compressed; | |
| 101 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
| 102 ds->ds_phys->ds_unique_bytes += used; | |
| 103 mutex_exit(&ds->ds_lock); | |
| 104 dsl_dir_diduse_space(ds->ds_dir, | |
| 105 used, compressed, uncompressed, tx); | |
| 106 } | |
| 107 | |
| 108 void | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
109 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
110 dmu_tx_t *tx) |
| 789 | 111 { |
| 2082 | 112 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 113 int compressed = BP_GET_PSIZE(bp); |
| 114 int uncompressed = BP_GET_UCSIZE(bp); | |
| 115 | |
| 116 ASSERT(dmu_tx_is_syncing(tx)); | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
117 /* No block pointer => nothing to free */ |
| 789 | 118 if (BP_IS_HOLE(bp)) |
| 119 return; | |
| 120 | |
| 121 ASSERT(used > 0); | |
| 122 if (ds == NULL) { | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
123 int err; |
| 789 | 124 /* |
| 125 * Account for the meta-objset space in its placeholder | |
| 126 * dataset. | |
| 127 */ | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
128 err = arc_free(pio, tx->tx_pool->dp_spa, |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
129 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
130 ASSERT(err == 0); |
| 789 | 131 |
| 132 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 133 -used, -compressed, -uncompressed, tx); | |
| 134 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 135 return; | |
| 136 } | |
| 137 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
| 138 | |
| 139 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 140 | |
| 141 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
142 int err; |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
143 |
| 789 | 144 dprintf_bp(bp, "freeing: %s", ""); |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
145 err = arc_free(pio, tx->tx_pool->dp_spa, |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
146 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
147 ASSERT(err == 0); |
| 789 | 148 |
| 149 mutex_enter(&ds->ds_lock); | |
| 150 /* XXX unique_bytes is not accurate for head datasets */ | |
| 151 /* ASSERT3U(ds->ds_phys->ds_unique_bytes, >=, used); */ | |
| 152 ds->ds_phys->ds_unique_bytes -= used; | |
| 153 mutex_exit(&ds->ds_lock); | |
| 154 dsl_dir_diduse_space(ds->ds_dir, | |
| 155 -used, -compressed, -uncompressed, tx); | |
| 156 } else { | |
| 157 dprintf_bp(bp, "putting on dead list: %s", ""); | |
| 1544 | 158 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
| 789 | 159 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
| 160 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 161 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 162 ds->ds_phys->ds_prev_snap_obj); | |
| 163 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); | |
| 164 if (ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 2082 | 165 ds->ds_object && bp->blk_birth > |
| 789 | 166 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
| 167 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 168 mutex_enter(&ds->ds_prev->ds_lock); | |
| 169 ds->ds_prev->ds_phys->ds_unique_bytes += | |
| 170 used; | |
| 171 mutex_exit(&ds->ds_prev->ds_lock); | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 mutex_enter(&ds->ds_lock); | |
| 176 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 177 ds->ds_phys->ds_used_bytes -= used; | |
| 178 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 179 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 180 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 181 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 182 mutex_exit(&ds->ds_lock); | |
| 183 } | |
| 184 | |
| 1544 | 185 uint64_t |
| 186 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 187 { |
| 2885 | 188 uint64_t trysnap = 0; |
| 189 | |
| 789 | 190 if (ds == NULL) |
| 1544 | 191 return (0); |
| 789 | 192 /* |
| 193 * The snapshot creation could fail, but that would cause an | |
| 194 * incorrect FALSE return, which would only result in an | |
| 195 * overestimation of the amount of space that an operation would | |
| 196 * consume, which is OK. | |
| 197 * | |
| 198 * There's also a small window where we could miss a pending | |
| 199 * snapshot, because we could set the sync task in the quiescing | |
| 200 * phase. So this should only be used as a guess. | |
| 201 */ | |
| 2885 | 202 if (ds->ds_trysnap_txg > |
| 203 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 204 trysnap = ds->ds_trysnap_txg; | |
| 205 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 206 } |
| 207 | |
| 208 int | |
| 209 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 210 { | |
| 211 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 212 } |
| 213 | |
| 214 /* ARGSUSED */ | |
| 215 static void | |
| 216 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 217 { | |
| 218 dsl_dataset_t *ds = dsv; | |
| 219 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 220 | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
221 /* open_refcount == DS_REF_MAX when deleting */ |
| 789 | 222 ASSERT(ds->ds_open_refcount == 0 || |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
223 ds->ds_open_refcount == DS_REF_MAX); |
| 789 | 224 |
| 225 dprintf_ds(ds, "evicting %s\n", ""); | |
| 226 | |
| 227 unique_remove(ds->ds_phys->ds_fsid_guid); | |
| 228 | |
| 229 if (ds->ds_user_ptr != NULL) | |
| 230 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 231 | |
| 232 if (ds->ds_prev) { | |
| 233 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 234 ds->ds_prev = NULL; | |
| 235 } | |
| 236 | |
| 237 bplist_close(&ds->ds_deadlist); | |
| 238 dsl_dir_close(ds->ds_dir, ds); | |
| 239 | |
| 240 if (list_link_active(&ds->ds_synced_link)) | |
| 241 list_remove(&dp->dp_synced_objsets, ds); | |
| 242 | |
| 2856 | 243 mutex_destroy(&ds->ds_lock); |
| 244 mutex_destroy(&ds->ds_deadlist.bpl_lock); | |
| 245 | |
| 789 | 246 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 247 } | |
| 248 | |
| 1544 | 249 static int |
| 789 | 250 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 251 { | |
| 252 dsl_dataset_phys_t *headphys; | |
| 253 int err; | |
| 254 dmu_buf_t *headdbuf; | |
| 255 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 256 objset_t *mos = dp->dp_meta_objset; | |
| 257 | |
| 258 if (ds->ds_snapname[0]) | |
| 1544 | 259 return (0); |
| 789 | 260 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 261 return (0); |
| 789 | 262 |
| 1544 | 263 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 264 FTAG, &headdbuf); | |
| 265 if (err) | |
| 266 return (err); | |
| 789 | 267 headphys = headdbuf->db_data; |
| 268 err = zap_value_search(dp->dp_meta_objset, | |
| 269 headphys->ds_snapnames_zapobj, ds->ds_object, ds->ds_snapname); | |
| 1544 | 270 dmu_buf_rele(headdbuf, FTAG); |
| 271 return (err); | |
| 789 | 272 } |
| 273 | |
| 1544 | 274 int |
| 789 | 275 dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, |
| 1544 | 276 int mode, void *tag, dsl_dataset_t **dsp) |
| 789 | 277 { |
| 278 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 279 objset_t *mos = dp->dp_meta_objset; | |
| 280 dmu_buf_t *dbuf; | |
| 281 dsl_dataset_t *ds; | |
| 1544 | 282 int err; |
| 789 | 283 |
| 284 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 285 dsl_pool_sync_context(dp)); | |
| 286 | |
| 1544 | 287 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 288 if (err) | |
| 289 return (err); | |
| 789 | 290 ds = dmu_buf_get_user(dbuf); |
| 291 if (ds == NULL) { | |
| 292 dsl_dataset_t *winner; | |
| 293 | |
| 294 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 295 ds->ds_dbuf = dbuf; | |
| 296 ds->ds_object = dsobj; | |
| 297 ds->ds_phys = dbuf->db_data; | |
| 298 | |
| 2856 | 299 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 300 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, | |
| 301 NULL); | |
| 302 | |
| 1544 | 303 err = bplist_open(&ds->ds_deadlist, |
| 789 | 304 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 305 if (err == 0) { |
| 306 err = dsl_dir_open_obj(dp, | |
| 307 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 308 } | |
| 309 if (err) { | |
| 310 /* | |
| 311 * we don't really need to close the blist if we | |
| 312 * just opened it. | |
| 313 */ | |
| 2856 | 314 mutex_destroy(&ds->ds_lock); |
| 315 mutex_destroy(&ds->ds_deadlist.bpl_lock); | |
| 1544 | 316 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 317 dmu_buf_rele(dbuf, tag); | |
| 318 return (err); | |
| 319 } | |
| 789 | 320 |
| 321 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 322 ds->ds_snapname[0] = '\0'; | |
| 323 if (ds->ds_phys->ds_prev_snap_obj) { | |
| 1544 | 324 err = dsl_dataset_open_obj(dp, |
| 789 | 325 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1544 | 326 DS_MODE_NONE, ds, &ds->ds_prev); |
| 789 | 327 } |
| 328 } else { | |
| 329 if (snapname) { | |
| 330 #ifdef ZFS_DEBUG | |
| 331 dsl_dataset_phys_t *headphys; | |
| 1544 | 332 dmu_buf_t *headdbuf; |
| 333 err = dmu_bonus_hold(mos, | |
| 334 ds->ds_dir->dd_phys->dd_head_dataset_obj, | |
| 335 FTAG, &headdbuf); | |
| 336 if (err == 0) { | |
| 337 headphys = headdbuf->db_data; | |
| 338 uint64_t foundobj; | |
| 339 err = zap_lookup(dp->dp_meta_objset, | |
| 340 headphys->ds_snapnames_zapobj, | |
| 341 snapname, sizeof (foundobj), 1, | |
| 342 &foundobj); | |
| 343 ASSERT3U(foundobj, ==, dsobj); | |
| 344 dmu_buf_rele(headdbuf, FTAG); | |
| 345 } | |
| 789 | 346 #endif |
| 347 (void) strcat(ds->ds_snapname, snapname); | |
| 348 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { | |
| 1544 | 349 err = dsl_dataset_get_snapname(ds); |
| 789 | 350 } |
| 351 } | |
| 352 | |
| 1544 | 353 if (err == 0) { |
| 354 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 355 dsl_dataset_evict); | |
| 356 } | |
| 357 if (err || winner) { | |
| 789 | 358 bplist_close(&ds->ds_deadlist); |
| 359 if (ds->ds_prev) { | |
| 360 dsl_dataset_close(ds->ds_prev, | |
| 361 DS_MODE_NONE, ds); | |
| 362 } | |
| 363 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 364 mutex_destroy(&ds->ds_lock); |
| 365 mutex_destroy(&ds->ds_deadlist.bpl_lock); | |
| 789 | 366 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 367 if (err) { |
| 368 dmu_buf_rele(dbuf, tag); | |
| 369 return (err); | |
| 370 } | |
| 789 | 371 ds = winner; |
| 372 } else { | |
| 373 uint64_t new = | |
| 374 unique_insert(ds->ds_phys->ds_fsid_guid); | |
| 375 if (new != ds->ds_phys->ds_fsid_guid) { | |
| 376 /* XXX it won't necessarily be synced... */ | |
| 377 ds->ds_phys->ds_fsid_guid = new; | |
| 378 } | |
| 379 } | |
| 380 } | |
| 381 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 382 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 383 | |
| 384 mutex_enter(&ds->ds_lock); | |
| 385 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 386 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 387 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
388 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 389 mutex_exit(&ds->ds_lock); |
| 390 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 391 return (EBUSY); |
| 789 | 392 } |
| 393 ds->ds_open_refcount += weight; | |
| 394 mutex_exit(&ds->ds_lock); | |
| 395 | |
| 1544 | 396 *dsp = ds; |
| 397 return (0); | |
| 789 | 398 } |
| 399 | |
| 400 int | |
| 401 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 402 void *tag, dsl_dataset_t **dsp) | |
| 403 { | |
| 404 dsl_dir_t *dd; | |
| 405 dsl_pool_t *dp; | |
| 406 const char *tail; | |
| 407 uint64_t obj; | |
| 408 dsl_dataset_t *ds = NULL; | |
| 409 int err = 0; | |
| 410 | |
| 1544 | 411 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 412 if (err) | |
| 413 return (err); | |
| 789 | 414 |
| 415 dp = dd->dd_pool; | |
| 416 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 417 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 418 if (obj == 0) { | |
| 419 /* A dataset with no associated objset */ | |
| 420 err = ENOENT; | |
| 421 goto out; | |
| 422 } | |
| 423 | |
| 424 if (tail != NULL) { | |
| 425 objset_t *mos = dp->dp_meta_objset; | |
| 426 | |
| 1544 | 427 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 428 DS_MODE_NONE, tag, &ds); | |
| 429 if (err) | |
| 430 goto out; | |
| 789 | 431 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 432 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 433 ds = NULL; | |
| 434 | |
| 435 if (tail[0] != '@') { | |
| 436 err = ENOENT; | |
| 437 goto out; | |
| 438 } | |
| 439 tail++; | |
| 440 | |
| 441 /* Look for a snapshot */ | |
| 442 if (!DS_MODE_IS_READONLY(mode)) { | |
| 443 err = EROFS; | |
| 444 goto out; | |
| 445 } | |
| 446 dprintf("looking for snapshot '%s'\n", tail); | |
| 447 err = zap_lookup(mos, obj, tail, 8, 1, &obj); | |
| 448 if (err) | |
| 449 goto out; | |
| 450 } | |
| 1544 | 451 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 452 |
| 453 out: | |
| 454 rw_exit(&dp->dp_config_rwlock); | |
| 455 dsl_dir_close(dd, FTAG); | |
| 456 | |
| 457 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 458 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 459 | |
| 460 *dsp = ds; | |
| 461 return (err); | |
| 462 } | |
| 463 | |
| 464 int | |
| 465 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 466 { | |
| 467 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 468 } | |
| 469 | |
| 470 void | |
| 471 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 472 { | |
| 473 if (ds == NULL) { | |
| 474 (void) strcpy(name, "mos"); | |
| 475 } else { | |
| 476 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 477 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 478 if (ds->ds_snapname[0]) { |
| 479 (void) strcat(name, "@"); | |
| 480 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 481 /* | |
| 482 * We use a "recursive" mutex so that we | |
| 483 * can call dprintf_ds() with ds_lock held. | |
| 484 */ | |
| 485 mutex_enter(&ds->ds_lock); | |
| 486 (void) strcat(name, ds->ds_snapname); | |
| 487 mutex_exit(&ds->ds_lock); | |
| 488 } else { | |
| 489 (void) strcat(name, ds->ds_snapname); | |
| 490 } | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 | |
|
3978
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
495 static int |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
496 dsl_dataset_namelen(dsl_dataset_t *ds) |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
497 { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
498 int result; |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
499 |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
500 if (ds == NULL) { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
501 result = 3; /* "mos" */ |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
502 } else { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
503 result = dsl_dir_namelen(ds->ds_dir); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
504 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
505 if (ds->ds_snapname[0]) { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
506 ++result; /* adding one for the @-sign */ |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
507 if (!MUTEX_HELD(&ds->ds_lock)) { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
508 /* see dsl_datset_name */ |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
509 mutex_enter(&ds->ds_lock); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
510 result += strlen(ds->ds_snapname); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
511 mutex_exit(&ds->ds_lock); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
512 } else { |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
513 result += strlen(ds->ds_snapname); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
514 } |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
515 } |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
516 } |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
517 |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
518 return (result); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
519 } |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
520 |
| 789 | 521 void |
| 522 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 523 { | |
| 524 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 525 mutex_enter(&ds->ds_lock); | |
| 526 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 527 ds->ds_open_refcount -= weight; | |
| 528 dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", | |
| 529 mode, ds->ds_open_refcount); | |
| 530 mutex_exit(&ds->ds_lock); | |
| 531 | |
| 1544 | 532 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 533 } |
| 534 | |
| 535 void | |
| 536 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) | |
| 537 { | |
| 538 objset_t *mos = dp->dp_meta_objset; | |
| 539 dmu_buf_t *dbuf; | |
| 540 dsl_dataset_phys_t *dsphys; | |
| 541 dsl_dataset_t *ds; | |
| 542 uint64_t dsobj; | |
| 543 dsl_dir_t *dd; | |
| 544 | |
| 545 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 546 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 547 |
|
928
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
548 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
549 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 550 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 551 dmu_buf_will_dirty(dbuf, tx); |
| 552 dsphys = dbuf->db_data; | |
| 553 dsphys->ds_dir_obj = dd->dd_object; | |
| 554 dsphys->ds_fsid_guid = unique_create(); | |
| 1544 | 555 unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ |
| 789 | 556 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, |
| 557 sizeof (dsphys->ds_guid)); | |
| 558 dsphys->ds_snapnames_zapobj = | |
|
885
d925b21dba78
6347493 tar of 25K empty directory entries in ZFS takes 30+ seconds ...
ahrens
parents:
789
diff
changeset
|
559 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 560 dsphys->ds_creation_time = gethrestime_sec(); |
| 561 dsphys->ds_creation_txg = tx->tx_txg; | |
| 562 dsphys->ds_deadlist_obj = | |
| 563 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 564 dmu_buf_rele(dbuf, FTAG); |
| 789 | 565 |
| 566 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 567 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 568 dsl_dir_close(dd, FTAG); | |
| 569 | |
| 1544 | 570 VERIFY(0 == |
| 571 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
572 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
573 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 574 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 575 } | |
| 576 | |
| 2199 | 577 uint64_t |
| 578 dsl_dataset_create_sync(dsl_dir_t *pdd, | |
| 789 | 579 const char *lastname, dsl_dataset_t *clone_parent, dmu_tx_t *tx) |
| 580 { | |
| 2199 | 581 dsl_pool_t *dp = pdd->dd_pool; |
| 789 | 582 dmu_buf_t *dbuf; |
| 583 dsl_dataset_phys_t *dsphys; | |
| 2199 | 584 uint64_t dsobj, ddobj; |
| 789 | 585 objset_t *mos = dp->dp_meta_objset; |
| 586 dsl_dir_t *dd; | |
| 587 | |
| 2199 | 588 ASSERT(clone_parent == NULL || clone_parent->ds_dir->dd_pool == dp); |
| 589 ASSERT(clone_parent == NULL || | |
| 590 clone_parent->ds_phys->ds_num_children > 0); | |
| 789 | 591 ASSERT(lastname[0] != '@'); |
| 592 ASSERT(dmu_tx_is_syncing(tx)); | |
| 593 | |
| 2199 | 594 ddobj = dsl_dir_create_sync(pdd, lastname, tx); |
| 595 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 789 | 596 |
|
928
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
597 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
598 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 599 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 600 dmu_buf_will_dirty(dbuf, tx); |
| 601 dsphys = dbuf->db_data; | |
| 602 dsphys->ds_dir_obj = dd->dd_object; | |
| 603 dsphys->ds_fsid_guid = unique_create(); | |
| 604 unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ | |
| 605 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 606 sizeof (dsphys->ds_guid)); | |
| 607 dsphys->ds_snapnames_zapobj = | |
|
885
d925b21dba78
6347493 tar of 25K empty directory entries in ZFS takes 30+ seconds ...
ahrens
parents:
789
diff
changeset
|
608 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 609 dsphys->ds_creation_time = gethrestime_sec(); |
| 610 dsphys->ds_creation_txg = tx->tx_txg; | |
| 611 dsphys->ds_deadlist_obj = | |
| 612 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 613 if (clone_parent) { | |
| 614 dsphys->ds_prev_snap_obj = clone_parent->ds_object; | |
| 615 dsphys->ds_prev_snap_txg = | |
| 616 clone_parent->ds_phys->ds_creation_txg; | |
| 617 dsphys->ds_used_bytes = | |
| 618 clone_parent->ds_phys->ds_used_bytes; | |
| 619 dsphys->ds_compressed_bytes = | |
| 620 clone_parent->ds_phys->ds_compressed_bytes; | |
| 621 dsphys->ds_uncompressed_bytes = | |
| 622 clone_parent->ds_phys->ds_uncompressed_bytes; | |
| 623 dsphys->ds_bp = clone_parent->ds_phys->ds_bp; | |
| 624 | |
| 625 dmu_buf_will_dirty(clone_parent->ds_dbuf, tx); | |
| 626 clone_parent->ds_phys->ds_num_children++; | |
| 627 | |
| 628 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 629 dd->dd_phys->dd_clone_parent_obj = clone_parent->ds_object; | |
| 630 } | |
| 1544 | 631 dmu_buf_rele(dbuf, FTAG); |
| 789 | 632 |
| 633 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 634 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 635 dsl_dir_close(dd, FTAG); | |
| 636 | |
| 2199 | 637 return (dsobj); |
| 638 } | |
| 639 | |
| 640 struct destroyarg { | |
| 641 dsl_sync_task_group_t *dstg; | |
| 642 char *snapname; | |
| 643 char *failed; | |
| 644 }; | |
| 645 | |
| 646 static int | |
| 647 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 648 { | |
| 649 struct destroyarg *da = arg; | |
| 650 dsl_dataset_t *ds; | |
| 651 char *cp; | |
| 652 int err; | |
| 653 | |
| 654 (void) strcat(name, "@"); | |
| 655 (void) strcat(name, da->snapname); | |
| 656 err = dsl_dataset_open(name, | |
| 657 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 658 da->dstg, &ds); |
| 2199 | 659 cp = strchr(name, '@'); |
| 660 *cp = '\0'; | |
| 661 if (err == ENOENT) | |
| 662 return (0); | |
| 663 if (err) { | |
| 664 (void) strcpy(da->failed, name); | |
| 665 return (err); | |
| 666 } | |
| 667 | |
| 668 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 669 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 670 return (0); |
| 671 } | |
| 672 | |
| 2199 | 673 /* |
| 674 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 675 */ | |
| 676 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 677 int | |
| 678 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 679 { | |
| 680 int err; | |
| 681 struct destroyarg da; | |
| 682 dsl_sync_task_t *dst; | |
| 683 spa_t *spa; | |
| 684 char *cp; | |
| 685 | |
| 686 cp = strchr(fsname, '/'); | |
| 687 if (cp) { | |
| 688 *cp = '\0'; | |
| 689 err = spa_open(fsname, &spa, FTAG); | |
| 690 *cp = '/'; | |
| 691 } else { | |
| 692 err = spa_open(fsname, &spa, FTAG); | |
| 693 } | |
| 694 if (err) | |
| 695 return (err); | |
| 696 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 697 da.snapname = snapname; | |
| 698 da.failed = fsname; | |
| 699 | |
| 700 err = dmu_objset_find(fsname, | |
| 2417 | 701 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 702 |
| 703 if (err == 0) | |
| 704 err = dsl_sync_task_group_wait(da.dstg); | |
| 705 | |
| 706 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 707 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 708 dsl_dataset_t *ds = dst->dst_arg1; | |
| 709 if (dst->dst_err) { | |
| 710 dsl_dataset_name(ds, fsname); | |
| 711 cp = strchr(fsname, '@'); | |
| 712 *cp = '\0'; | |
| 713 } | |
| 714 /* | |
| 715 * If it was successful, destroy_sync would have | |
| 716 * closed the ds | |
| 717 */ | |
| 718 if (err) | |
| 4007 | 719 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 720 } |
| 721 | |
| 722 dsl_sync_task_group_destroy(da.dstg); | |
| 723 spa_close(spa, FTAG); | |
| 724 return (err); | |
| 725 } | |
| 726 | |
| 789 | 727 int |
| 728 dsl_dataset_destroy(const char *name) | |
| 729 { | |
| 730 int err; | |
| 2199 | 731 dsl_sync_task_group_t *dstg; |
| 732 objset_t *os; | |
| 733 dsl_dataset_t *ds; | |
| 789 | 734 dsl_dir_t *dd; |
| 2199 | 735 uint64_t obj; |
| 736 | |
| 737 if (strchr(name, '@')) { | |
| 738 /* Destroying a snapshot is simpler */ | |
| 739 err = dsl_dataset_open(name, | |
| 740 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 741 FTAG, &ds); | |
| 742 if (err) | |
| 743 return (err); | |
| 744 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 745 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 746 ds, FTAG, 0); | |
| 747 if (err) | |
| 748 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 749 return (err); | |
| 750 } | |
| 751 | |
| 752 err = dmu_objset_open(name, DMU_OST_ANY, | |
| 753 DS_MODE_EXCLUSIVE | DS_MODE_INCONSISTENT, &os); | |
| 754 if (err) | |
| 755 return (err); | |
| 756 ds = os->os->os_dsl_dataset; | |
| 757 dd = ds->ds_dir; | |
| 789 | 758 |
| 2199 | 759 /* |
| 760 * Check for errors and mark this ds as inconsistent, in | |
| 761 * case we crash while freeing the objects. | |
| 762 */ | |
| 763 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 764 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 765 if (err) { | |
| 766 dmu_objset_close(os); | |
| 767 return (err); | |
| 768 } | |
| 769 | |
| 770 /* | |
| 771 * remove the objects in open context, so that we won't | |
| 772 * have too much to do in syncing context. | |
| 773 */ | |
|
3025
4e5ee8301d84
6424466 "panic: data after EOF" when unmounting abused pool
ahrens
parents:
2885
diff
changeset
|
774 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
|
4e5ee8301d84
6424466 "panic: data after EOF" when unmounting abused pool
ahrens
parents:
2885
diff
changeset
|
775 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 776 dmu_tx_t *tx = dmu_tx_create(os); |
| 777 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 778 dmu_tx_hold_bonus(tx, obj); | |
| 779 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 780 if (err) { | |
| 781 /* | |
| 782 * Perhaps there is not enough disk | |
| 783 * space. Just deal with it from | |
| 784 * dsl_dataset_destroy_sync(). | |
| 785 */ | |
| 786 dmu_tx_abort(tx); | |
| 787 continue; | |
| 788 } | |
| 789 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 790 dmu_tx_commit(tx); | |
| 791 } | |
| 792 /* Make sure it's not dirty before we finish destroying it. */ | |
| 793 txg_wait_synced(dd->dd_pool, 0); | |
| 794 | |
| 795 dmu_objset_close(os); | |
| 796 if (err != ESRCH) | |
| 797 return (err); | |
| 798 | |
| 799 err = dsl_dataset_open(name, | |
| 800 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 801 FTAG, &ds); | |
| 1544 | 802 if (err) |
| 803 return (err); | |
| 789 | 804 |
| 2199 | 805 err = dsl_dir_open(name, FTAG, &dd, NULL); |
| 806 if (err) { | |
| 807 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 808 return (err); | |
| 789 | 809 } |
| 810 | |
| 2199 | 811 /* |
| 812 * Blow away the dsl_dir + head dataset. | |
| 813 */ | |
| 814 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 815 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 816 dsl_dataset_destroy_sync, ds, FTAG, 0); | |
| 817 dsl_sync_task_create(dstg, dsl_dir_destroy_check, | |
| 818 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 819 err = dsl_sync_task_group_wait(dstg); | |
| 820 dsl_sync_task_group_destroy(dstg); | |
| 821 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 822 if (err) { | |
| 823 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 824 dsl_dir_close(dd, FTAG); | |
| 825 } | |
| 789 | 826 return (err); |
| 827 } | |
| 828 | |
| 829 int | |
| 2199 | 830 dsl_dataset_rollback(dsl_dataset_t *ds) |
| 789 | 831 { |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
832 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 833 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 834 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 835 ds, NULL, 0)); | |
| 789 | 836 } |
| 837 | |
| 838 void * | |
| 839 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 840 void *p, dsl_dataset_evict_func_t func) | |
| 841 { | |
| 842 void *old; | |
| 843 | |
| 844 mutex_enter(&ds->ds_lock); | |
| 845 old = ds->ds_user_ptr; | |
| 846 if (old == NULL) { | |
| 847 ds->ds_user_ptr = p; | |
| 848 ds->ds_user_evict_func = func; | |
| 849 } | |
| 850 mutex_exit(&ds->ds_lock); | |
| 851 return (old); | |
| 852 } | |
| 853 | |
| 854 void * | |
| 855 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 856 { | |
| 857 return (ds->ds_user_ptr); | |
| 858 } | |
| 859 | |
| 860 | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
861 blkptr_t * |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
862 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 863 { |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
864 return (&ds->ds_phys->ds_bp); |
| 789 | 865 } |
| 866 | |
| 867 void | |
| 868 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 869 { | |
| 870 ASSERT(dmu_tx_is_syncing(tx)); | |
| 871 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 872 if (ds == NULL) { | |
| 873 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 874 } else { | |
| 875 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 876 ds->ds_phys->ds_bp = *bp; | |
| 877 } | |
| 878 } | |
| 879 | |
| 880 spa_t * | |
| 881 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 882 { | |
| 883 return (ds->ds_dir->dd_pool->dp_spa); | |
| 884 } | |
| 885 | |
| 886 void | |
| 887 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 888 { | |
| 889 dsl_pool_t *dp; | |
| 890 | |
| 891 if (ds == NULL) /* this is the meta-objset */ | |
| 892 return; | |
| 893 | |
| 894 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 895 |
| 896 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 897 panic("dirtying snapshot!"); | |
| 789 | 898 |
| 899 dp = ds->ds_dir->dd_pool; | |
| 900 | |
| 901 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 902 /* up the hold count until we can be written out */ | |
| 903 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 904 } | |
| 905 } | |
| 906 | |
| 907 struct killarg { | |
| 908 uint64_t *usedp; | |
| 909 uint64_t *compressedp; | |
| 910 uint64_t *uncompressedp; | |
| 911 zio_t *zio; | |
| 912 dmu_tx_t *tx; | |
| 913 }; | |
| 914 | |
| 915 static int | |
| 916 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 917 { | |
| 918 struct killarg *ka = arg; | |
| 919 blkptr_t *bp = &bc->bc_blkptr; | |
| 920 | |
| 921 ASSERT3U(bc->bc_errno, ==, 0); | |
| 922 | |
| 923 /* | |
| 924 * Since this callback is not called concurrently, no lock is | |
| 925 * needed on the accounting values. | |
| 926 */ | |
| 2082 | 927 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 928 *ka->compressedp += BP_GET_PSIZE(bp); |
| 929 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 930 /* XXX check for EIO? */ | |
| 931 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 932 ARC_NOWAIT); | |
| 933 return (0); | |
| 934 } | |
| 935 | |
| 936 /* ARGSUSED */ | |
| 2199 | 937 static int |
| 938 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 939 { |
| 2199 | 940 dsl_dataset_t *ds = arg1; |
| 789 | 941 |
| 2199 | 942 /* |
| 943 * There must be a previous snapshot. I suppose we could roll | |
| 944 * it back to being empty (and re-initialize the upper (ZPL) | |
| 945 * layer). But for now there's no way to do this via the user | |
| 946 * interface. | |
| 947 */ | |
| 948 if (ds->ds_phys->ds_prev_snap_txg == 0) | |
| 789 | 949 return (EINVAL); |
| 950 | |
| 2199 | 951 /* |
| 952 * This must not be a snapshot. | |
| 953 */ | |
| 954 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 955 return (EINVAL); | |
| 789 | 956 |
| 957 /* | |
| 958 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 959 * them. Try again. | |
| 960 */ | |
| 2199 | 961 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 962 return (EAGAIN); |
| 2199 | 963 |
| 964 return (0); | |
| 965 } | |
| 789 | 966 |
| 2199 | 967 /* ARGSUSED */ |
| 968 static void | |
| 969 dsl_dataset_rollback_sync(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 970 { | |
| 971 dsl_dataset_t *ds = arg1; | |
| 972 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 789 | 973 |
| 974 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 975 | |
| 976 /* Zero out the deadlist. */ | |
| 977 bplist_close(&ds->ds_deadlist); | |
| 978 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 979 ds->ds_phys->ds_deadlist_obj = | |
| 980 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 981 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 982 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 983 |
| 984 { | |
| 985 /* Free blkptrs that we gave birth to */ | |
| 986 zio_t *zio; | |
| 987 uint64_t used = 0, compressed = 0, uncompressed = 0; | |
| 988 struct killarg ka; | |
| 989 | |
| 990 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 991 ZIO_FLAG_MUSTSUCCEED); | |
| 992 ka.usedp = &used; | |
| 993 ka.compressedp = &compressed; | |
| 994 ka.uncompressedp = &uncompressed; | |
| 995 ka.zio = zio; | |
| 996 ka.tx = tx; | |
| 997 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 998 ADVANCE_POST, kill_blkptr, &ka); | |
| 999 (void) zio_wait(zio); | |
| 1000 | |
| 2199 | 1001 dsl_dir_diduse_space(ds->ds_dir, |
| 789 | 1002 -used, -compressed, -uncompressed, tx); |
| 1003 } | |
| 1004 | |
| 2199 | 1005 /* Change our contents to that of the prev snapshot */ |
| 789 | 1006 ASSERT3U(ds->ds_prev->ds_object, ==, ds->ds_phys->ds_prev_snap_obj); |
| 1007 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1008 ds->ds_phys->ds_used_bytes = ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1009 ds->ds_phys->ds_compressed_bytes = | |
| 1010 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1011 ds->ds_phys->ds_uncompressed_bytes = | |
| 1012 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1013 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; |
| 789 | 1014 ds->ds_phys->ds_unique_bytes = 0; |
| 1015 | |
|
2532
752725c22841
6448999 panic: used == ds->ds_phys->ds_unique_bytes
ahrens
parents:
2417
diff
changeset
|
1016 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
|
752725c22841
6448999 panic: used == ds->ds_phys->ds_unique_bytes
ahrens
parents:
2417
diff
changeset
|
1017 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
|
752725c22841
6448999 panic: used == ds->ds_phys->ds_unique_bytes
ahrens
parents:
2417
diff
changeset
|
1018 ds->ds_prev->ds_phys->ds_unique_bytes = 0; |
|
752725c22841
6448999 panic: used == ds->ds_phys->ds_unique_bytes
ahrens
parents:
2417
diff
changeset
|
1019 } |
| 789 | 1020 } |
| 1021 | |
|
1731
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1022 /* ARGSUSED */ |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1023 static int |
| 2199 | 1024 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
1731
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1025 { |
| 2199 | 1026 dsl_dataset_t *ds = arg1; |
|
1731
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1027 |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1028 /* |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1029 * Can't delete a head dataset if there are snapshots of it. |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1030 * (Except if the only snapshots are from the branch we cloned |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1031 * from.) |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1032 */ |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1033 if (ds->ds_prev != NULL && |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1034 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1035 return (EINVAL); |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1036 |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1037 return (0); |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1038 } |
|
1efa8b3d1296
6402598 'zfs destroy <fs>' can take a long time, stopping up the txg train
bonwick
parents:
1544
diff
changeset
|
1039 |
| 2199 | 1040 /* ARGSUSED */ |
| 1041 static void | |
| 1042 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1043 { |
| 2199 | 1044 dsl_dataset_t *ds = arg1; |
| 789 | 1045 |
| 2199 | 1046 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1047 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1048 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 1049 } | |
| 789 | 1050 |
| 2199 | 1051 /* ARGSUSED */ |
| 1052 static int | |
| 1053 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1054 { | |
| 1055 dsl_dataset_t *ds = arg1; | |
| 789 | 1056 |
| 1057 /* Can't delete a branch point. */ | |
| 2199 | 1058 if (ds->ds_phys->ds_num_children > 1) |
| 1059 return (EEXIST); | |
| 789 | 1060 |
| 1061 /* | |
| 1062 * Can't delete a head dataset if there are snapshots of it. | |
| 1063 * (Except if the only snapshots are from the branch we cloned | |
| 1064 * from.) | |
| 1065 */ | |
| 1066 if (ds->ds_prev != NULL && | |
| 2199 | 1067 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1068 return (EINVAL); |
| 1069 | |
| 1070 /* | |
| 1071 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1072 * them. Try again. | |
| 1073 */ | |
| 2199 | 1074 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1075 return (EAGAIN); |
| 2199 | 1076 |
| 1077 /* XXX we should do some i/o error checking... */ | |
| 1078 return (0); | |
| 1079 } | |
| 1080 | |
| 1081 static void | |
| 1082 dsl_dataset_destroy_sync(void *arg1, void *tag, dmu_tx_t *tx) | |
| 1083 { | |
| 1084 dsl_dataset_t *ds = arg1; | |
| 1085 uint64_t used = 0, compressed = 0, uncompressed = 0; | |
| 1086 zio_t *zio; | |
| 1087 int err; | |
| 1088 int after_branch_point = FALSE; | |
| 1089 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1090 objset_t *mos = dp->dp_meta_objset; | |
| 1091 dsl_dataset_t *ds_prev = NULL; | |
| 1092 uint64_t obj; | |
| 1093 | |
|
3444
dc160a70a50d
6410433 'zpool status -v' would be more useful with filenames
ek110237
parents:
3025
diff
changeset
|
1094 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1095 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1096 ASSERT(ds->ds_prev == NULL || | |
| 1097 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1098 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1099 | |
| 1100 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); | |
| 1101 | |
| 1102 obj = ds->ds_object; | |
| 789 | 1103 |
| 1104 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1105 if (ds->ds_prev) { | |
| 1106 ds_prev = ds->ds_prev; | |
| 1107 } else { | |
| 2199 | 1108 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1109 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1110 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1111 } |
| 1112 after_branch_point = | |
| 1113 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1114 | |
| 1115 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1116 if (after_branch_point && | |
| 1117 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1118 /* This clone is toast. */ | |
| 1119 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1120 ds_prev->ds_phys->ds_num_children--; | |
| 1121 } else if (!after_branch_point) { | |
| 1122 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1123 ds->ds_phys->ds_next_snap_obj; | |
| 1124 } | |
| 1125 } | |
| 1126 | |
| 1127 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1128 | |
| 1129 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1130 blkptr_t bp; |
| 789 | 1131 dsl_dataset_t *ds_next; |
| 1132 uint64_t itor = 0; | |
| 1133 | |
| 1134 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1135 | |
| 2199 | 1136 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1137 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1138 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1139 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1140 | |
| 1141 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); | |
| 1142 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1143 ds->ds_phys->ds_prev_snap_obj; | |
| 1144 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1145 ds->ds_phys->ds_prev_snap_txg; | |
| 1146 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1147 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1148 | |
| 1149 /* | |
| 1150 * Transfer to our deadlist (which will become next's | |
| 1151 * new deadlist) any entries from next's current | |
| 1152 * deadlist which were born before prev, and free the | |
| 1153 * other entries. | |
| 1154 * | |
| 1155 * XXX we're doing this long task with the config lock held | |
| 1156 */ | |
| 1157 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1158 &bp) == 0) { | |
| 1159 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1160 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1161 &bp, tx)); | |
| 789 | 1162 if (ds_prev && !after_branch_point && |
| 1163 bp.blk_birth > | |
| 1164 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1165 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1166 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1167 } |
| 1168 } else { | |
| 2082 | 1169 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1170 compressed += BP_GET_PSIZE(&bp); |
| 1171 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1172 /* XXX check return value? */ | |
| 1173 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1174 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1175 } | |
| 1176 } | |
| 1177 | |
| 1178 /* free next's deadlist */ | |
| 1179 bplist_close(&ds_next->ds_deadlist); | |
| 1180 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1181 | |
| 1182 /* set next's deadlist to our deadlist */ | |
| 1183 ds_next->ds_phys->ds_deadlist_obj = | |
| 1184 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1185 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1186 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1187 ds->ds_phys->ds_deadlist_obj = 0; |
| 1188 | |
| 1189 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1190 /* | |
| 1191 * Update next's unique to include blocks which | |
| 1192 * were previously shared by only this snapshot | |
| 1193 * and it. Those blocks will be born after the | |
| 1194 * prev snap and before this snap, and will have | |
| 1195 * died after the next snap and before the one | |
| 1196 * after that (ie. be on the snap after next's | |
| 1197 * deadlist). | |
| 1198 * | |
| 1199 * XXX we're doing this long task with the | |
| 1200 * config lock held | |
| 1201 */ | |
| 1202 dsl_dataset_t *ds_after_next; | |
| 1203 | |
| 2199 | 1204 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1205 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1206 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1207 itor = 0; |
| 1208 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1209 &itor, &bp) == 0) { | |
| 1210 if (bp.blk_birth > | |
| 1211 ds->ds_phys->ds_prev_snap_txg && | |
| 1212 bp.blk_birth <= | |
| 1213 ds->ds_phys->ds_creation_txg) { | |
| 1214 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1215 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1216 } |
| 1217 } | |
| 1218 | |
| 1219 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1220 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1221 } else { | |
| 1222 /* | |
| 1223 * It would be nice to update the head dataset's | |
| 1224 * unique. To do so we would have to traverse | |
| 1225 * it for blocks born after ds_prev, which is | |
| 1226 * pretty expensive just to maintain something | |
| 1227 * for debugging purposes. | |
| 1228 */ | |
| 1229 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1230 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1231 ds_next); | |
| 1232 if (ds_prev) { | |
| 2199 | 1233 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1234 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1235 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1236 } else { |
| 1237 ds_next->ds_prev = NULL; | |
| 1238 } | |
| 1239 } | |
| 1240 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1241 | |
| 1242 /* | |
| 1243 * NB: unique_bytes is not accurate for head objsets | |
| 1244 * because we don't update it when we delete the most | |
| 1245 * recent snapshot -- see above comment. | |
| 1246 */ | |
| 1247 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1248 } else { | |
| 1249 /* | |
| 1250 * There's no next snapshot, so this is a head dataset. | |
| 1251 * Destroy the deadlist. Unless it's a clone, the | |
| 1252 * deadlist should be empty. (If it's a clone, it's | |
| 1253 * safe to ignore the deadlist contents.) | |
| 1254 */ | |
| 1255 struct killarg ka; | |
| 1256 | |
| 1257 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1258 bplist_close(&ds->ds_deadlist); | |
| 1259 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1260 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1261 | |
| 1262 /* | |
| 1263 * Free everything that we point to (that's born after | |
| 1264 * the previous snapshot, if we are a clone) | |
| 1265 * | |
| 1266 * XXX we're doing this long task with the config lock held | |
| 1267 */ | |
| 1268 ka.usedp = &used; | |
| 1269 ka.compressedp = &compressed; | |
| 1270 ka.uncompressedp = &uncompressed; | |
| 1271 ka.zio = zio; | |
| 1272 ka.tx = tx; | |
| 1273 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1274 ADVANCE_POST, kill_blkptr, &ka); | |
| 1275 ASSERT3U(err, ==, 0); | |
| 1276 } | |
| 1277 | |
| 1278 err = zio_wait(zio); | |
| 1279 ASSERT3U(err, ==, 0); | |
| 1280 | |
| 2199 | 1281 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1282 |
| 1283 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1284 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1285 ASSERT(err == 0); | |
| 1286 } | |
| 1287 | |
| 2199 | 1288 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1289 /* Erase the link in the dataset */ |
| 2199 | 1290 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1291 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1292 /* |
| 1293 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1294 * the dataset. | |
| 1295 */ | |
| 1296 } else { | |
| 1297 /* remove from snapshot namespace */ | |
| 1298 dsl_dataset_t *ds_head; | |
| 2199 | 1299 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1300 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1301 DS_MODE_NONE, FTAG, &ds_head)); |
|
2207
47efcb3433a7
6439370 assertion failures possible in dsl_dataset_destroy_sync()
ahrens
parents:
2199
diff
changeset
|
1302 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1303 #ifdef ZFS_DEBUG |
| 1304 { | |
| 1305 uint64_t val; | |
| 1306 err = zap_lookup(mos, | |
| 1307 ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1308 ds->ds_snapname, 8, 1, &val); |
| 789 | 1309 ASSERT3U(err, ==, 0); |
| 1310 ASSERT3U(val, ==, obj); | |
| 1311 } | |
| 1312 #endif | |
| 1313 err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1314 ds->ds_snapname, tx); |
| 789 | 1315 ASSERT(err == 0); |
| 1316 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1317 } | |
| 1318 | |
| 1319 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1320 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1321 | |
| 3912 | 1322 spa_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 2199 | 1323 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1324 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1325 |
| 2199 | 1326 } |
| 1327 | |
| 1328 /* ARGSUSED */ | |
| 1329 int | |
| 1330 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1331 { | |
| 1332 objset_t *os = arg1; | |
| 1333 dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
| 1334 const char *snapname = arg2; | |
| 1335 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1336 int err; | |
| 1337 uint64_t value; | |
| 789 | 1338 |
| 1339 /* | |
| 2199 | 1340 * We don't allow multiple snapshots of the same txg. If there |
| 1341 * is already one, try again. | |
| 1342 */ | |
| 1343 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1344 return (EAGAIN); | |
| 1345 | |
| 1346 /* | |
| 1347 * Check for conflicting name snapshot name. | |
| 789 | 1348 */ |
| 2199 | 1349 err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, |
| 1350 snapname, 8, 1, &value); | |
| 1351 if (err == 0) | |
| 1352 return (EEXIST); | |
| 1353 if (err != ENOENT) | |
| 1354 return (err); | |
| 789 | 1355 |
|
3978
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1356 /* |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1357 * Check that the dataset's name is not too long. Name consists |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1358 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1359 */ |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1360 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1361 return (ENAMETOOLONG); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1362 |
| 2199 | 1363 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1364 return (0); |
| 1365 } | |
| 1366 | |
| 2199 | 1367 void |
| 1368 dsl_dataset_snapshot_sync(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1369 { |
| 2199 | 1370 objset_t *os = arg1; |
| 1371 dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
| 1372 const char *snapname = arg2; | |
| 1373 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1374 dmu_buf_t *dbuf; |
| 1375 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1376 uint64_t dsobj; |
| 789 | 1377 objset_t *mos = dp->dp_meta_objset; |
| 1378 int err; | |
| 1379 | |
| 1380 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1381 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1382 |
|
928
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
1383 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
1384 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1385 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1386 dmu_buf_will_dirty(dbuf, tx); |
| 1387 dsphys = dbuf->db_data; | |
| 2199 | 1388 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1389 dsphys->ds_fsid_guid = unique_create(); |
| 1390 unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ | |
| 1391 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1392 sizeof (dsphys->ds_guid)); | |
| 1393 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1394 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1395 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1396 dsphys->ds_num_children = 1; | |
| 1397 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1398 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1399 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1400 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1401 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1402 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1403 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1404 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1405 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1406 |
| 2199 | 1407 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1408 if (ds->ds_prev) { | |
| 1409 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1410 ds->ds_object || |
| 2199 | 1411 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1412 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1413 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1414 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1415 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1416 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1417 } |
| 1418 } | |
| 1419 | |
| 1420 bplist_close(&ds->ds_deadlist); | |
| 1421 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1422 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, dsphys->ds_creation_txg); | |
| 1423 ds->ds_phys->ds_prev_snap_obj = dsobj; | |
| 1424 ds->ds_phys->ds_prev_snap_txg = dsphys->ds_creation_txg; | |
| 1425 ds->ds_phys->ds_unique_bytes = 0; | |
| 1426 ds->ds_phys->ds_deadlist_obj = | |
| 1427 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1428 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1429 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1430 |
| 1431 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1432 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1433 snapname, 8, 1, &dsobj, tx); | |
| 1434 ASSERT(err == 0); | |
| 1435 | |
| 1436 if (ds->ds_prev) | |
| 1437 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1438 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1439 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1440 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 789 | 1441 } |
| 1442 | |
| 1443 void | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
1444 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1445 { |
| 1446 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1447 ASSERT(ds->ds_user_ptr != NULL); | |
| 1448 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1449 | |
| 1450 dsl_dir_dirty(ds->ds_dir, tx); | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
1451 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
1452 /* Unneeded? bplist_close(&ds->ds_deadlist); */ |
| 789 | 1453 } |
| 1454 | |
| 1455 void | |
| 2885 | 1456 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1457 { |
| 2885 | 1458 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1459 |
| 2885 | 1460 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1461 ds->ds_phys->ds_creation_time); | |
| 1462 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1463 ds->ds_phys->ds_creation_txg); | |
| 1464 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, | |
| 1465 ds->ds_phys->ds_used_bytes); | |
| 789 | 1466 |
| 1467 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1468 /* | |
| 1469 * This is a snapshot; override the dd's space used with | |
| 2885 | 1470 * our unique space and compression ratio. |
| 789 | 1471 */ |
| 2885 | 1472 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1473 ds->ds_phys->ds_unique_bytes); | |
| 1474 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1475 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1476 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1477 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1478 } |
| 1479 } | |
| 1480 | |
| 2885 | 1481 void |
| 1482 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1483 { |
| 2885 | 1484 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1485 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 1486 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1487 stat->dds_is_snapshot = B_TRUE; | |
| 1488 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1489 } | |
| 1490 | |
| 1491 /* clone origin is really a dsl_dir thing... */ | |
| 1492 if (ds->ds_dir->dd_phys->dd_clone_parent_obj) { | |
| 1493 dsl_dataset_t *ods; | |
| 1494 | |
| 1495 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); | |
| 1496 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 1497 ds->ds_dir->dd_phys->dd_clone_parent_obj, | |
| 1498 NULL, DS_MODE_NONE, FTAG, &ods)); | |
| 1499 dsl_dataset_name(ods, stat->dds_clone_of); | |
| 1500 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); | |
| 1501 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); | |
| 1502 } | |
| 1503 } | |
| 1504 | |
| 1505 uint64_t | |
| 1506 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1507 { | |
| 1508 return (ds->ds_phys->ds_fsid_guid); | |
| 1509 } | |
| 1510 | |
| 1511 void | |
| 1512 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1513 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1514 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1515 { | |
| 1516 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1517 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
| 1518 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; | |
| 1519 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1520 } |
| 1521 | |
| 2199 | 1522 /* ARGSUSED */ |
| 789 | 1523 static int |
| 2199 | 1524 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1525 { |
| 2199 | 1526 dsl_dataset_t *ds = arg1; |
| 1527 char *newsnapname = arg2; | |
| 1528 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1529 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1530 dsl_dataset_t *hds; |
| 1531 uint64_t val; | |
| 789 | 1532 int err; |
| 1533 | |
| 2199 | 1534 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1535 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1536 if (err) |
| 1537 return (err); | |
| 1538 | |
| 2199 | 1539 /* new name better not be in use */ |
| 1540 err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1541 newsnapname, 8, 1, &val); | |
| 1542 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); | |
| 789 | 1543 |
| 2199 | 1544 if (err == 0) |
| 1545 err = EEXIST; | |
| 1546 else if (err == ENOENT) | |
| 1547 err = 0; | |
| 4007 | 1548 |
| 1549 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1550 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1551 err = ENAMETOOLONG; | |
| 1552 | |
| 2199 | 1553 return (err); |
| 1554 } | |
| 789 | 1555 |
| 2199 | 1556 static void |
| 1557 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1558 { | |
| 1559 dsl_dataset_t *ds = arg1; | |
| 1560 char *newsnapname = arg2; | |
| 1561 dsl_dir_t *dd = ds->ds_dir; | |
| 1562 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1563 dsl_dataset_t *hds; | |
| 1564 int err; | |
| 789 | 1565 |
| 2199 | 1566 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1567 |
| 2199 | 1568 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1569 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1570 |
| 2199 | 1571 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 1572 err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1573 ds->ds_snapname, tx); | |
| 789 | 1574 ASSERT3U(err, ==, 0); |
| 2199 | 1575 mutex_enter(&ds->ds_lock); |
| 1576 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1577 mutex_exit(&ds->ds_lock); | |
| 1578 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1579 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1580 ASSERT3U(err, ==, 0); |
| 1581 | |
| 2199 | 1582 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1583 } |
| 1584 | |
| 4007 | 1585 struct renamearg { |
| 1586 dsl_sync_task_group_t *dstg; | |
| 1587 char failed[MAXPATHLEN]; | |
| 1588 char *oldsnap; | |
| 1589 char *newsnap; | |
| 1590 }; | |
| 1591 | |
| 1592 static int | |
| 1593 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1594 { | |
| 1595 struct renamearg *ra = arg; | |
| 1596 dsl_dataset_t *ds = NULL; | |
| 1597 char *cp; | |
| 1598 int err; | |
| 1599 | |
| 1600 cp = name + strlen(name); | |
| 1601 *cp = '@'; | |
| 1602 (void) strcpy(cp + 1, ra->oldsnap); | |
| 1603 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, | |
| 1604 ra->dstg, &ds); | |
| 1605 if (err == ENOENT) { | |
| 1606 *cp = '\0'; | |
| 1607 return (0); | |
| 1608 } | |
| 1609 if (err) { | |
| 1610 (void) strcpy(ra->failed, name); | |
| 1611 *cp = '\0'; | |
| 1612 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1613 return (err); | |
| 1614 } | |
| 1615 | |
| 1616 #ifdef _KERNEL | |
| 1617 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1618 (void) zfs_unmount_snap(name, NULL); | |
| 1619 #endif | |
| 1620 | |
| 1621 *cp = '\0'; | |
| 1622 | |
| 1623 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1624 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1625 | |
| 1626 return (0); | |
| 1627 } | |
| 1628 | |
| 1629 static int | |
| 1630 dsl_recursive_rename(char *oldname, const char *newname) | |
| 1631 { | |
| 1632 int err; | |
| 1633 struct renamearg *ra; | |
| 1634 dsl_sync_task_t *dst; | |
| 1635 spa_t *spa; | |
| 1636 char *cp, *fsname = spa_strdup(oldname); | |
| 1637 int len = strlen(oldname); | |
| 1638 | |
| 1639 /* truncate the snapshot name to get the fsname */ | |
| 1640 cp = strchr(fsname, '@'); | |
| 1641 *cp = '\0'; | |
| 1642 | |
| 1643 cp = strchr(fsname, '/'); | |
| 1644 if (cp) { | |
| 1645 *cp = '\0'; | |
| 1646 err = spa_open(fsname, &spa, FTAG); | |
| 1647 *cp = '/'; | |
| 1648 } else { | |
| 1649 err = spa_open(fsname, &spa, FTAG); | |
| 1650 } | |
| 1651 if (err) { | |
| 1652 kmem_free(fsname, len + 1); | |
| 1653 return (err); | |
| 1654 } | |
| 1655 ra = kmem_alloc(sizeof (struct renamearg), KM_SLEEP); | |
| 1656 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 1657 | |
| 1658 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 1659 ra->newsnap = strchr(newname, '@') + 1; | |
| 1660 *ra->failed = '\0'; | |
| 1661 | |
| 1662 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 1663 DS_FIND_CHILDREN); | |
| 1664 kmem_free(fsname, len + 1); | |
| 1665 | |
| 1666 if (err == 0) { | |
| 1667 err = dsl_sync_task_group_wait(ra->dstg); | |
| 1668 } | |
| 1669 | |
| 1670 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 1671 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 1672 dsl_dataset_t *ds = dst->dst_arg1; | |
| 1673 if (dst->dst_err) { | |
| 1674 dsl_dir_name(ds->ds_dir, ra->failed); | |
|
4009
1a9b4fbc0d2a
6479884 want 'zfs rename -r' to recursively rename snapshots (fix lint)
mmusante
parents:
4007
diff
changeset
|
1675 (void) strcat(ra->failed, "@"); |
|
1a9b4fbc0d2a
6479884 want 'zfs rename -r' to recursively rename snapshots (fix lint)
mmusante
parents:
4007
diff
changeset
|
1676 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 1677 } |
| 1678 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1679 } | |
| 1680 | |
| 1681 (void) strcpy(oldname, ra->failed); | |
| 1682 | |
| 1683 dsl_sync_task_group_destroy(ra->dstg); | |
| 1684 kmem_free(ra, sizeof (struct renamearg)); | |
| 1685 spa_close(spa, FTAG); | |
| 1686 return (err); | |
| 1687 } | |
| 1688 | |
| 789 | 1689 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 1690 int | |
| 4007 | 1691 dsl_dataset_rename(char *oldname, const char *newname, |
| 1692 boolean_t recursive) | |
| 789 | 1693 { |
| 1694 dsl_dir_t *dd; | |
| 2199 | 1695 dsl_dataset_t *ds; |
| 789 | 1696 const char *tail; |
| 1697 int err; | |
| 1698 | |
| 2199 | 1699 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 1700 if (err) |
| 1701 return (err); | |
| 789 | 1702 if (tail == NULL) { |
| 2199 | 1703 err = dsl_dir_rename(dd, newname); |
| 789 | 1704 dsl_dir_close(dd, FTAG); |
| 1705 return (err); | |
| 1706 } | |
| 1707 if (tail[0] != '@') { | |
| 1708 /* the name ended in a nonexistant component */ | |
| 1709 dsl_dir_close(dd, FTAG); | |
| 1710 return (ENOENT); | |
| 1711 } | |
| 1712 | |
| 2199 | 1713 dsl_dir_close(dd, FTAG); |
| 1714 | |
| 1715 /* new name must be snapshot in same filesystem */ | |
| 1716 tail = strchr(newname, '@'); | |
| 1717 if (tail == NULL) | |
| 1718 return (EINVAL); | |
| 1719 tail++; | |
| 1720 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 1721 return (EXDEV); | |
| 789 | 1722 |
| 4007 | 1723 if (recursive) { |
| 1724 err = dsl_recursive_rename(oldname, newname); | |
| 1725 } else { | |
| 1726 err = dsl_dataset_open(oldname, | |
| 1727 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 1728 if (err) | |
| 1729 return (err); | |
| 2199 | 1730 |
| 4007 | 1731 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 1732 dsl_dataset_snapshot_rename_check, | |
| 1733 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 1734 |
| 4007 | 1735 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 1736 } | |
| 2199 | 1737 |
| 789 | 1738 return (err); |
| 1739 } | |
| 2082 | 1740 |
| 2199 | 1741 struct promotearg { |
| 1742 uint64_t used, comp, uncomp, unique; | |
| 1743 uint64_t newnext_obj, snapnames_obj; | |
| 1744 }; | |
| 1745 | |
| 2082 | 1746 static int |
| 2199 | 1747 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 1748 { |
| 2199 | 1749 dsl_dataset_t *hds = arg1; |
| 1750 struct promotearg *pa = arg2; | |
| 1751 dsl_dir_t *dd = hds->ds_dir; | |
| 1752 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 2082 | 1753 dsl_dir_t *pdd = NULL; |
| 1754 dsl_dataset_t *ds = NULL; | |
| 1755 dsl_dataset_t *pivot_ds = NULL; | |
| 1756 dsl_dataset_t *newnext_ds = NULL; | |
| 1757 int err; | |
| 1758 char *name = NULL; | |
| 2199 | 1759 uint64_t itor = 0; |
| 2082 | 1760 blkptr_t bp; |
| 1761 | |
| 2199 | 1762 bzero(pa, sizeof (*pa)); |
| 1763 | |
| 2082 | 1764 /* Check that it is a clone */ |
| 1765 if (dd->dd_phys->dd_clone_parent_obj == 0) | |
| 1766 return (EINVAL); | |
| 1767 | |
| 2199 | 1768 /* Since this is so expensive, don't do the preliminary check */ |
| 1769 if (!dmu_tx_is_syncing(tx)) | |
| 1770 return (0); | |
| 1771 | |
| 1772 if (err = dsl_dataset_open_obj(dp, | |
| 2082 | 1773 dd->dd_phys->dd_clone_parent_obj, |
| 1774 NULL, DS_MODE_EXCLUSIVE, FTAG, &pivot_ds)) | |
| 1775 goto out; | |
| 1776 pdd = pivot_ds->ds_dir; | |
| 2199 | 1777 |
| 1778 { | |
| 1779 dsl_dataset_t *phds; | |
| 1780 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 1781 pdd->dd_phys->dd_head_dataset_obj, | |
| 1782 NULL, DS_MODE_NONE, FTAG, &phds)) | |
| 1783 goto out; | |
| 1784 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; | |
| 1785 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 1786 } | |
| 2082 | 1787 |
| 1788 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 1789 err = EXDEV; | |
| 1790 goto out; | |
| 1791 } | |
| 1792 | |
| 1793 /* find pivot point's new next ds */ | |
| 1794 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, | |
| 1795 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 1796 while (newnext_ds->ds_phys->ds_prev_snap_obj != pivot_ds->ds_object) { | |
| 1797 dsl_dataset_t *prev; | |
| 1798 | |
| 1799 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 1800 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 1801 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 1802 goto out; |
| 1803 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 1804 newnext_ds = prev; | |
| 1805 } | |
| 2199 | 1806 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 1807 |
| 1808 /* compute pivot point's new unique space */ | |
| 1809 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, | |
| 1810 &itor, &bp)) == 0) { | |
| 1811 if (bp.blk_birth > pivot_ds->ds_phys->ds_prev_snap_txg) | |
| 2199 | 1812 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 1813 } |
| 1814 if (err != ENOENT) | |
| 1815 goto out; | |
| 1816 | |
| 1817 /* Walk the snapshots that we are moving */ | |
| 1818 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 1819 ds = pivot_ds; | |
| 1820 /* CONSTCOND */ | |
| 1821 while (TRUE) { | |
| 1822 uint64_t val, dlused, dlcomp, dluncomp; | |
| 1823 dsl_dataset_t *prev; | |
| 1824 | |
| 1825 /* Check that the snapshot name does not conflict */ | |
| 1826 dsl_dataset_name(ds, name); | |
| 1827 err = zap_lookup(dd->dd_pool->dp_meta_objset, | |
| 1828 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, | |
| 1829 8, 1, &val); | |
| 1830 if (err != ENOENT) { | |
| 1831 if (err == 0) | |
| 1832 err = EEXIST; | |
| 1833 goto out; | |
| 1834 } | |
| 1835 | |
| 1836 /* | |
| 1837 * compute space to transfer. Each snapshot gave birth to: | |
| 1838 * (my used) - (prev's used) + (deadlist's used) | |
| 1839 */ | |
| 2199 | 1840 pa->used += ds->ds_phys->ds_used_bytes; |
| 1841 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 1842 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1843 |
| 1844 /* If we reach the first snapshot, we're done. */ | |
| 1845 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 1846 break; | |
| 1847 | |
| 1848 if (err = bplist_space(&ds->ds_deadlist, | |
| 1849 &dlused, &dlcomp, &dluncomp)) | |
| 1850 goto out; | |
| 1851 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 1852 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 1853 FTAG, &prev)) | |
| 1854 goto out; | |
| 2199 | 1855 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 1856 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 1857 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1858 |
| 1859 /* | |
| 1860 * We could be a clone of a clone. If we reach our | |
| 1861 * parent's branch point, we're done. | |
| 1862 */ | |
| 1863 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 1864 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 1865 break; | |
| 1866 } | |
| 1867 if (ds != pivot_ds) | |
| 1868 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 1869 ds = prev; | |
| 1870 } | |
| 1871 | |
| 1872 /* Check that there is enough space here */ | |
| 2199 | 1873 err = dsl_dir_transfer_possible(pdd, dd, pa->used); |
| 1874 | |
| 1875 out: | |
| 1876 if (ds && ds != pivot_ds) | |
| 1877 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 1878 if (pivot_ds) | |
| 1879 dsl_dataset_close(pivot_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 1880 if (newnext_ds) | |
| 1881 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 1882 if (name) | |
| 1883 kmem_free(name, MAXPATHLEN); | |
| 1884 return (err); | |
| 1885 } | |
| 2082 | 1886 |
| 2199 | 1887 static void |
| 1888 dsl_dataset_promote_sync(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1889 { | |
| 1890 dsl_dataset_t *hds = arg1; | |
| 1891 struct promotearg *pa = arg2; | |
| 1892 dsl_dir_t *dd = hds->ds_dir; | |
| 1893 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 1894 dsl_dir_t *pdd = NULL; | |
| 1895 dsl_dataset_t *ds, *pivot_ds; | |
| 1896 char *name; | |
| 1897 | |
| 1898 ASSERT(dd->dd_phys->dd_clone_parent_obj != 0); | |
| 1899 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); | |
| 1900 | |
| 1901 VERIFY(0 == dsl_dataset_open_obj(dp, | |
| 1902 dd->dd_phys->dd_clone_parent_obj, | |
| 1903 NULL, DS_MODE_EXCLUSIVE, FTAG, &pivot_ds)); | |
| 2417 | 1904 /* |
| 1905 * We need to explicitly open pdd, since pivot_ds's pdd will be | |
| 1906 * changing. | |
| 1907 */ | |
| 1908 VERIFY(0 == dsl_dir_open_obj(dp, pivot_ds->ds_dir->dd_object, | |
| 1909 NULL, FTAG, &pdd)); | |
| 2082 | 1910 |
| 1911 /* move snapshots to this dir */ | |
| 2199 | 1912 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 2082 | 1913 ds = pivot_ds; |
| 1914 /* CONSTCOND */ | |
| 1915 while (TRUE) { | |
| 1916 dsl_dataset_t *prev; | |
| 1917 | |
| 1918 /* move snap name entry */ | |
| 1919 dsl_dataset_name(ds, name); | |
| 2199 | 1920 VERIFY(0 == zap_remove(dp->dp_meta_objset, |
| 1921 pa->snapnames_obj, ds->ds_snapname, tx)); | |
| 1922 VERIFY(0 == zap_add(dp->dp_meta_objset, | |
| 2082 | 1923 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 1924 8, 1, &ds->ds_object, tx)); | |
| 1925 | |
| 1926 /* change containing dsl_dir */ | |
| 1927 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1928 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, pdd->dd_object); | |
| 1929 ds->ds_phys->ds_dir_obj = dd->dd_object; | |
| 1930 ASSERT3P(ds->ds_dir, ==, pdd); | |
| 1931 dsl_dir_close(ds->ds_dir, ds); | |
| 2199 | 1932 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 1933 NULL, ds, &ds->ds_dir)); |
| 1934 | |
| 1935 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 1936 | |
| 1937 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 1938 break; | |
| 1939 | |
| 2199 | 1940 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 1941 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 1942 FTAG, &prev)); | |
| 1943 | |
| 1944 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 1945 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 1946 break; | |
| 1947 } | |
| 1948 if (ds != pivot_ds) | |
| 1949 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 1950 ds = prev; | |
| 1951 } | |
| 2199 | 1952 if (ds != pivot_ds) |
| 1953 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2082 | 1954 |
| 1955 /* change pivot point's next snap */ | |
| 1956 dmu_buf_will_dirty(pivot_ds->ds_dbuf, tx); | |
| 2199 | 1957 pivot_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; |
| 2082 | 1958 |
| 1959 /* change clone_parent-age */ | |
| 1960 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 1961 ASSERT3U(dd->dd_phys->dd_clone_parent_obj, ==, pivot_ds->ds_object); | |
| 1962 dd->dd_phys->dd_clone_parent_obj = pdd->dd_phys->dd_clone_parent_obj; | |
| 1963 dmu_buf_will_dirty(pdd->dd_dbuf, tx); | |
| 1964 pdd->dd_phys->dd_clone_parent_obj = pivot_ds->ds_object; | |
| 1965 | |
| 1966 /* change space accounting */ | |
| 2199 | 1967 dsl_dir_diduse_space(pdd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 1968 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); | |
| 1969 pivot_ds->ds_phys->ds_unique_bytes = pa->unique; | |
| 2082 | 1970 |
| 2417 | 1971 dsl_dir_close(pdd, FTAG); |
| 2199 | 1972 dsl_dataset_close(pivot_ds, DS_MODE_EXCLUSIVE, FTAG); |
| 1973 kmem_free(name, MAXPATHLEN); | |
| 2082 | 1974 } |
| 1975 | |
| 1976 int | |
| 1977 dsl_dataset_promote(const char *name) | |
| 1978 { | |
| 1979 dsl_dataset_t *ds; | |
| 1980 int err; | |
| 1981 dmu_object_info_t doi; | |
| 2199 | 1982 struct promotearg pa; |
| 2082 | 1983 |
| 1984 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 1985 if (err) | |
| 1986 return (err); | |
| 1987 | |
| 1988 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 1989 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 1990 if (err) { | |
| 1991 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 1992 return (err); | |
| 1993 } | |
| 1994 | |
| 1995 /* | |
| 1996 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 1997 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 1998 * bonus buffers. | |
| 1999 */ | |
| 2199 | 2000 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2001 dsl_dataset_promote_check, | |
| 2002 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2003 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2004 return (err); | |
| 2005 } | |
| 3912 | 2006 |
| 2007 /* | |
| 2008 * Given a pool name and a dataset object number in that pool, | |
| 2009 * return the name of that dataset. | |
| 2010 */ | |
| 2011 int | |
| 2012 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2013 { | |
| 2014 spa_t *spa; | |
| 2015 dsl_pool_t *dp; | |
| 2016 dsl_dataset_t *ds = NULL; | |
| 2017 int error; | |
| 2018 | |
| 2019 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2020 return (error); | |
| 2021 dp = spa_get_dsl(spa); | |
| 2022 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2023 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2024 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2025 rw_exit(&dp->dp_config_rwlock); | |
| 2026 spa_close(spa, FTAG); | |
| 2027 return (error); | |
| 2028 } | |
| 2029 dsl_dataset_name(ds, buf); | |
| 2030 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2031 rw_exit(&dp->dp_config_rwlock); | |
| 2032 spa_close(spa, FTAG); | |
| 2033 | |
| 2034 return (0); | |
| 2035 } |