1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 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 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/dsl_pool.h> 27 #include <sys/dsl_dataset.h> 28 #include <sys/dsl_dir.h> 29 #include <sys/dsl_synctask.h> 30 #include <sys/dmu_tx.h> 31 #include <sys/dmu_objset.h> 32 #include <sys/arc.h> 33 #include <sys/zap.h> 34 #include <sys/zio.h> 35 #include <sys/zfs_context.h> 36 #include <sys/fs/zfs.h> 37 #include <sys/zfs_znode.h> 38 #include <sys/spa_impl.h> 39 40 int zfs_no_write_throttle = 0; 41 int zfs_write_limit_shift = 3; /* 1/8th of physical memory */ 42 int zfs_txg_synctime = 5; /* target secs to sync a txg */ 43 44 uint64_t zfs_write_limit_min = 32 << 20; /* min write limit is 32MB */ 45 uint64_t zfs_write_limit_max = 0; /* max data payload per txg */ 46 uint64_t zfs_write_limit_inflated = 0; 47 uint64_t zfs_write_limit_override = 0; 48 49 kmutex_t zfs_write_limit_lock; 50 51 static pgcnt_t old_physmem = 0; 52 53 static int 54 dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **ddp) 55 { 56 uint64_t obj; 57 int err; 58 59 err = zap_lookup(dp->dp_meta_objset, 60 dp->dp_root_dir->dd_phys->dd_child_dir_zapobj, 61 name, sizeof (obj), 1, &obj); 62 if (err) 63 return (err); 64 65 return (dsl_dir_open_obj(dp, obj, name, dp, ddp)); 66 } 67 68 static dsl_pool_t * 69 dsl_pool_open_impl(spa_t *spa, uint64_t txg) 70 { 71 dsl_pool_t *dp; 72 blkptr_t *bp = spa_get_rootblkptr(spa); 73 74 dp = kmem_zalloc(sizeof (dsl_pool_t), KM_SLEEP); 75 dp->dp_spa = spa; 76 dp->dp_meta_rootbp = *bp; 77 rw_init(&dp->dp_config_rwlock, NULL, RW_DEFAULT, NULL); 78 dp->dp_write_limit = zfs_write_limit_min; 79 txg_init(dp, txg); 80 81 txg_list_create(&dp->dp_dirty_datasets, 82 offsetof(dsl_dataset_t, ds_dirty_link)); 83 txg_list_create(&dp->dp_dirty_dirs, 84 offsetof(dsl_dir_t, dd_dirty_link)); 85 txg_list_create(&dp->dp_sync_tasks, 86 offsetof(dsl_sync_task_group_t, dstg_node)); 87 list_create(&dp->dp_synced_datasets, sizeof (dsl_dataset_t), 88 offsetof(dsl_dataset_t, ds_synced_link)); 89 90 mutex_init(&dp->dp_lock, NULL, MUTEX_DEFAULT, NULL); 91 mutex_init(&dp->dp_scrub_cancel_lock, NULL, MUTEX_DEFAULT, NULL); 92 93 dp->dp_vnrele_taskq = taskq_create("zfs_vn_rele_taskq", 1, minclsyspri, 94 1, 4, 0); 95 96 return (dp); 97 } 98 99 int 100 dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp) 101 { 102 int err; 103 dsl_pool_t *dp = dsl_pool_open_impl(spa, txg); 104 dsl_dir_t *dd; 105 dsl_dataset_t *ds; 106 objset_impl_t *osi; 107 108 rw_enter(&dp->dp_config_rwlock, RW_WRITER); 109 err = dmu_objset_open_impl(spa, NULL, &dp->dp_meta_rootbp, &osi); 110 if (err) 111 goto out; 112 dp->dp_meta_objset = &osi->os; 113 114 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 115 DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, 116 &dp->dp_root_dir_obj); 117 if (err) 118 goto out; 119 120 err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj, 121 NULL, dp, &dp->dp_root_dir); 122 if (err) 123 goto out; 124 125 err = dsl_pool_open_special_dir(dp, MOS_DIR_NAME, &dp->dp_mos_dir); 126 if (err) 127 goto out; 128 129 if (spa_version(spa) >= SPA_VERSION_ORIGIN) { 130 err = dsl_pool_open_special_dir(dp, ORIGIN_DIR_NAME, &dd); 131 if (err) 132 goto out; 133 err = dsl_dataset_hold_obj(dp, dd->dd_phys->dd_head_dataset_obj, 134 FTAG, &ds); 135 if (err == 0) { 136 err = dsl_dataset_hold_obj(dp, 137 ds->ds_phys->ds_prev_snap_obj, dp, 138 &dp->dp_origin_snap); 139 dsl_dataset_rele(ds, FTAG); 140 } 141 dsl_dir_close(dd, dp); 142 if (err) 143 goto out; 144 } 145 146 /* get scrub status */ 147 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 148 DMU_POOL_SCRUB_FUNC, sizeof (uint32_t), 1, 149 &dp->dp_scrub_func); 150 if (err == 0) { 151 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 152 DMU_POOL_SCRUB_QUEUE, sizeof (uint64_t), 1, 153 &dp->dp_scrub_queue_obj); 154 if (err) 155 goto out; 156 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 157 DMU_POOL_SCRUB_MIN_TXG, sizeof (uint64_t), 1, 158 &dp->dp_scrub_min_txg); 159 if (err) 160 goto out; 161 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 162 DMU_POOL_SCRUB_MAX_TXG, sizeof (uint64_t), 1, 163 &dp->dp_scrub_max_txg); 164 if (err) 165 goto out; 166 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 167 DMU_POOL_SCRUB_BOOKMARK, sizeof (uint64_t), 4, 168 &dp->dp_scrub_bookmark); 169 if (err) 170 goto out; 171 err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 172 DMU_POOL_SCRUB_ERRORS, sizeof (uint64_t), 1, 173 &spa->spa_scrub_errors); 174 if (err) 175 goto out; 176 if (spa_version(spa) < SPA_VERSION_DSL_SCRUB) { 177 /* 178 * A new-type scrub was in progress on an old 179 * pool. Restart from the beginning, since the 180 * old software may have changed the pool in the 181 * meantime. 182 */ 183 dsl_pool_scrub_restart(dp); 184 } 185 } else { 186 /* 187 * It's OK if there is no scrub in progress (and if 188 * there was an I/O error, ignore it). 189 */ 190 err = 0; 191 } 192 193 out: 194 rw_exit(&dp->dp_config_rwlock); 195 if (err) 196 dsl_pool_close(dp); 197 else 198 *dpp = dp; 199 200 return (err); 201 } 202 203 void 204 dsl_pool_close(dsl_pool_t *dp) 205 { 206 /* drop our references from dsl_pool_open() */ 207 208 /* 209 * Since we held the origin_snap from "syncing" context (which 210 * includes pool-opening context), it actually only got a "ref" 211 * and not a hold, so just drop that here. 212 */ 213 if (dp->dp_origin_snap) 214 dsl_dataset_drop_ref(dp->dp_origin_snap, dp); 215 if (dp->dp_mos_dir) 216 dsl_dir_close(dp->dp_mos_dir, dp); 217 if (dp->dp_root_dir) 218 dsl_dir_close(dp->dp_root_dir, dp); 219 220 /* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */ 221 if (dp->dp_meta_objset) 222 dmu_objset_evict(NULL, dp->dp_meta_objset->os); 223 224 txg_list_destroy(&dp->dp_dirty_datasets); 225 txg_list_destroy(&dp->dp_dirty_dirs); 226 list_destroy(&dp->dp_synced_datasets); 227 228 arc_flush(dp->dp_spa); 229 txg_fini(dp); 230 rw_destroy(&dp->dp_config_rwlock); 231 mutex_destroy(&dp->dp_lock); 232 mutex_destroy(&dp->dp_scrub_cancel_lock); 233 taskq_destroy(dp->dp_vnrele_taskq); 234 if (dp->dp_blkstats) 235 kmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t)); 236 kmem_free(dp, sizeof (dsl_pool_t)); 237 } 238 239 dsl_pool_t * 240 dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg) 241 { 242 int err; 243 dsl_pool_t *dp = dsl_pool_open_impl(spa, txg); 244 dmu_tx_t *tx = dmu_tx_create_assigned(dp, txg); 245 objset_impl_t *osip; 246 dsl_dataset_t *ds; 247 uint64_t dsobj; 248 249 /* create and open the MOS (meta-objset) */ 250 dp->dp_meta_objset = &dmu_objset_create_impl(spa, 251 NULL, &dp->dp_meta_rootbp, DMU_OST_META, tx)->os; 252 253 /* create the pool directory */ 254 err = zap_create_claim(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 255 DMU_OT_OBJECT_DIRECTORY, DMU_OT_NONE, 0, tx); 256 ASSERT3U(err, ==, 0); 257 258 /* create and open the root dir */ 259 dp->dp_root_dir_obj = dsl_dir_create_sync(dp, NULL, NULL, tx); 260 VERIFY(0 == dsl_dir_open_obj(dp, dp->dp_root_dir_obj, 261 NULL, dp, &dp->dp_root_dir)); 262 263 /* create and open the meta-objset dir */ 264 (void) dsl_dir_create_sync(dp, dp->dp_root_dir, MOS_DIR_NAME, tx); 265 VERIFY(0 == dsl_pool_open_special_dir(dp, 266 MOS_DIR_NAME, &dp->dp_mos_dir)); 267 268 if (spa_version(spa) >= SPA_VERSION_DSL_SCRUB) 269 dsl_pool_create_origin(dp, tx); 270 271 /* create the root dataset */ 272 dsobj = dsl_dataset_create_sync_dd(dp->dp_root_dir, NULL, 0, tx); 273 274 /* create the root objset */ 275 VERIFY(0 == dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 276 osip = dmu_objset_create_impl(dp->dp_spa, ds, 277 dsl_dataset_get_blkptr(ds), DMU_OST_ZFS, tx); 278 #ifdef _KERNEL 279 zfs_create_fs(&osip->os, kcred, zplprops, tx); 280 #endif 281 dsl_dataset_rele(ds, FTAG); 282 283 dmu_tx_commit(tx); 284 285 return (dp); 286 } 287 288 void 289 dsl_pool_sync(dsl_pool_t *dp, uint64_t txg) 290 { 291 zio_t *zio; 292 dmu_tx_t *tx; 293 dsl_dir_t *dd; 294 dsl_dataset_t *ds; 295 dsl_sync_task_group_t *dstg; 296 objset_impl_t *mosi = dp->dp_meta_objset->os; 297 hrtime_t start, write_time; 298 uint64_t data_written; 299 int err; 300 301 tx = dmu_tx_create_assigned(dp, txg); 302 303 dp->dp_read_overhead = 0; 304 start = gethrtime(); 305 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 306 while (ds = txg_list_remove(&dp->dp_dirty_datasets, txg)) { 307 if (!list_link_active(&ds->ds_synced_link)) 308 list_insert_tail(&dp->dp_synced_datasets, ds); 309 else 310 dmu_buf_rele(ds->ds_dbuf, ds); 311 dsl_dataset_sync(ds, zio, tx); 312 } 313 DTRACE_PROBE(pool_sync__1setup); 314 315 err = zio_wait(zio); 316 write_time = gethrtime() - start; 317 ASSERT(err == 0); 318 DTRACE_PROBE(pool_sync__2rootzio); 319 320 while (dstg = txg_list_remove(&dp->dp_sync_tasks, txg)) 321 dsl_sync_task_group_sync(dstg, tx); 322 DTRACE_PROBE(pool_sync__3task); 323 324 start = gethrtime(); 325 while (dd = txg_list_remove(&dp->dp_dirty_dirs, txg)) 326 dsl_dir_sync(dd, tx); 327 write_time += gethrtime() - start; 328 329 if (spa_sync_pass(dp->dp_spa) == 1) 330 dsl_pool_scrub_sync(dp, tx); 331 332 start = gethrtime(); 333 if (list_head(&mosi->os_dirty_dnodes[txg & TXG_MASK]) != NULL || 334 list_head(&mosi->os_free_dnodes[txg & TXG_MASK]) != NULL) { 335 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 336 dmu_objset_sync(mosi, zio, tx); 337 err = zio_wait(zio); 338 ASSERT(err == 0); 339 dprintf_bp(&dp->dp_meta_rootbp, "meta objset rootbp is %s", ""); 340 spa_set_rootblkptr(dp->dp_spa, &dp->dp_meta_rootbp); 341 } 342 write_time += gethrtime() - start; 343 DTRACE_PROBE2(pool_sync__4io, hrtime_t, write_time, 344 hrtime_t, dp->dp_read_overhead); 345 write_time -= dp->dp_read_overhead; 346 347 dmu_tx_commit(tx); 348 349 data_written = dp->dp_space_towrite[txg & TXG_MASK]; 350 dp->dp_space_towrite[txg & TXG_MASK] = 0; 351 ASSERT(dp->dp_tempreserved[txg & TXG_MASK] == 0); 352 353 /* 354 * If the write limit max has not been explicitly set, set it 355 * to a fraction of available physical memory (default 1/8th). 356 * Note that we must inflate the limit because the spa 357 * inflates write sizes to account for data replication. 358 * Check this each sync phase to catch changing memory size. 359 */ 360 if (physmem != old_physmem && zfs_write_limit_shift) { 361 mutex_enter(&zfs_write_limit_lock); 362 old_physmem = physmem; 363 zfs_write_limit_max = ptob(physmem) >> zfs_write_limit_shift; 364 zfs_write_limit_inflated = MAX(zfs_write_limit_min, 365 spa_get_asize(dp->dp_spa, zfs_write_limit_max)); 366 mutex_exit(&zfs_write_limit_lock); 367 } 368 369 /* 370 * Attempt to keep the sync time consistent by adjusting the 371 * amount of write traffic allowed into each transaction group. 372 * Weight the throughput calculation towards the current value: 373 * thru = 3/4 old_thru + 1/4 new_thru 374 */ 375 ASSERT(zfs_write_limit_min > 0); 376 if (data_written > zfs_write_limit_min / 8 && write_time > 0) { 377 uint64_t throughput = (data_written * NANOSEC) / write_time; 378 if (dp->dp_throughput) 379 dp->dp_throughput = throughput / 4 + 380 3 * dp->dp_throughput / 4; 381 else 382 dp->dp_throughput = throughput; 383 dp->dp_write_limit = MIN(zfs_write_limit_inflated, 384 MAX(zfs_write_limit_min, 385 dp->dp_throughput * zfs_txg_synctime)); 386 } 387 } 388 389 void 390 dsl_pool_zil_clean(dsl_pool_t *dp) 391 { 392 dsl_dataset_t *ds; 393 394 while (ds = list_head(&dp->dp_synced_datasets)) { 395 list_remove(&dp->dp_synced_datasets, ds); 396 ASSERT(ds->ds_user_ptr != NULL); 397 zil_clean(((objset_impl_t *)ds->ds_user_ptr)->os_zil); 398 dmu_buf_rele(ds->ds_dbuf, ds); 399 } 400 } 401 402 /* 403 * TRUE if the current thread is the tx_sync_thread or if we 404 * are being called from SPA context during pool initialization. 405 */ 406 int 407 dsl_pool_sync_context(dsl_pool_t *dp) 408 { 409 return (curthread == dp->dp_tx.tx_sync_thread || 410 spa_get_dsl(dp->dp_spa) == NULL); 411 } 412 413 uint64_t 414 dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree) 415 { 416 uint64_t space, resv; 417 418 /* 419 * Reserve about 1.6% (1/64), or at least 32MB, for allocation 420 * efficiency. 421 * XXX The intent log is not accounted for, so it must fit 422 * within this slop. 423 * 424 * If we're trying to assess whether it's OK to do a free, 425 * cut the reservation in half to allow forward progress 426 * (e.g. make it possible to rm(1) files from a full pool). 427 */ 428 space = spa_get_dspace(dp->dp_spa); 429 resv = MAX(space >> 6, SPA_MINDEVSIZE >> 1); 430 if (netfree) 431 resv >>= 1; 432 433 return (space - resv); 434 } 435 436 int 437 dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx) 438 { 439 uint64_t reserved = 0; 440 uint64_t write_limit = (zfs_write_limit_override ? 441 zfs_write_limit_override : dp->dp_write_limit); 442 443 if (zfs_no_write_throttle) { 444 atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], 445 space); 446 return (0); 447 } 448 449 /* 450 * Check to see if we have exceeded the maximum allowed IO for 451 * this transaction group. We can do this without locks since 452 * a little slop here is ok. Note that we do the reserved check 453 * with only half the requested reserve: this is because the 454 * reserve requests are worst-case, and we really don't want to 455 * throttle based off of worst-case estimates. 456 */ 457 if (write_limit > 0) { 458 reserved = dp->dp_space_towrite[tx->tx_txg & TXG_MASK] 459 + dp->dp_tempreserved[tx->tx_txg & TXG_MASK] / 2; 460 461 if (reserved && reserved > write_limit) 462 return (ERESTART); 463 } 464 465 atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], space); 466 467 /* 468 * If this transaction group is over 7/8ths capacity, delay 469 * the caller 1 clock tick. This will slow down the "fill" 470 * rate until the sync process can catch up with us. 471 */ 472 if (reserved && reserved > (write_limit - (write_limit >> 3))) 473 txg_delay(dp, tx->tx_txg, 1); 474 475 return (0); 476 } 477 478 void 479 dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx) 480 { 481 ASSERT(dp->dp_tempreserved[tx->tx_txg & TXG_MASK] >= space); 482 atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], -space); 483 } 484 485 void 486 dsl_pool_memory_pressure(dsl_pool_t *dp) 487 { 488 uint64_t space_inuse = 0; 489 int i; 490 491 if (dp->dp_write_limit == zfs_write_limit_min) 492 return; 493 494 for (i = 0; i < TXG_SIZE; i++) { 495 space_inuse += dp->dp_space_towrite[i]; 496 space_inuse += dp->dp_tempreserved[i]; 497 } 498 dp->dp_write_limit = MAX(zfs_write_limit_min, 499 MIN(dp->dp_write_limit, space_inuse / 4)); 500 } 501 502 void 503 dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx) 504 { 505 if (space > 0) { 506 mutex_enter(&dp->dp_lock); 507 dp->dp_space_towrite[tx->tx_txg & TXG_MASK] += space; 508 mutex_exit(&dp->dp_lock); 509 } 510 } 511 512 /* ARGSUSED */ 513 static int 514 upgrade_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg) 515 { 516 dmu_tx_t *tx = arg; 517 dsl_dataset_t *ds, *prev = NULL; 518 int err; 519 dsl_pool_t *dp = spa_get_dsl(spa); 520 521 err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds); 522 if (err) 523 return (err); 524 525 while (ds->ds_phys->ds_prev_snap_obj != 0) { 526 err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj, 527 FTAG, &prev); 528 if (err) { 529 dsl_dataset_rele(ds, FTAG); 530 return (err); 531 } 532 533 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) 534 break; 535 dsl_dataset_rele(ds, FTAG); 536 ds = prev; 537 prev = NULL; 538 } 539 540 if (prev == NULL) { 541 prev = dp->dp_origin_snap; 542 543 /* 544 * The $ORIGIN can't have any data, or the accounting 545 * will be wrong. 546 */ 547 ASSERT(prev->ds_phys->ds_bp.blk_birth == 0); 548 549 /* The origin doesn't get attached to itself */ 550 if (ds->ds_object == prev->ds_object) { 551 dsl_dataset_rele(ds, FTAG); 552 return (0); 553 } 554 555 dmu_buf_will_dirty(ds->ds_dbuf, tx); 556 ds->ds_phys->ds_prev_snap_obj = prev->ds_object; 557 ds->ds_phys->ds_prev_snap_txg = prev->ds_phys->ds_creation_txg; 558 559 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); 560 ds->ds_dir->dd_phys->dd_origin_obj = prev->ds_object; 561 562 dmu_buf_will_dirty(prev->ds_dbuf, tx); 563 prev->ds_phys->ds_num_children++; 564 565 if (ds->ds_phys->ds_next_snap_obj == 0) { 566 ASSERT(ds->ds_prev == NULL); 567 VERIFY(0 == dsl_dataset_hold_obj(dp, 568 ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev)); 569 } 570 } 571 572 ASSERT(ds->ds_dir->dd_phys->dd_origin_obj == prev->ds_object); 573 ASSERT(ds->ds_phys->ds_prev_snap_obj == prev->ds_object); 574 575 if (prev->ds_phys->ds_next_clones_obj == 0) { 576 prev->ds_phys->ds_next_clones_obj = 577 zap_create(dp->dp_meta_objset, 578 DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 579 } 580 VERIFY(0 == zap_add_int(dp->dp_meta_objset, 581 prev->ds_phys->ds_next_clones_obj, ds->ds_object, tx)); 582 583 dsl_dataset_rele(ds, FTAG); 584 if (prev != dp->dp_origin_snap) 585 dsl_dataset_rele(prev, FTAG); 586 return (0); 587 } 588 589 void 590 dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx) 591 { 592 ASSERT(dmu_tx_is_syncing(tx)); 593 ASSERT(dp->dp_origin_snap != NULL); 594 595 (void) dmu_objset_find_spa(dp->dp_spa, NULL, upgrade_clones_cb, 596 tx, DS_FIND_CHILDREN); 597 } 598 599 void 600 dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx) 601 { 602 uint64_t dsobj; 603 dsl_dataset_t *ds; 604 605 ASSERT(dmu_tx_is_syncing(tx)); 606 ASSERT(dp->dp_origin_snap == NULL); 607 608 /* create the origin dir, ds, & snap-ds */ 609 rw_enter(&dp->dp_config_rwlock, RW_WRITER); 610 dsobj = dsl_dataset_create_sync(dp->dp_root_dir, ORIGIN_DIR_NAME, 611 NULL, 0, kcred, tx); 612 VERIFY(0 == dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 613 dsl_dataset_snapshot_sync(ds, ORIGIN_DIR_NAME, kcred, tx); 614 VERIFY(0 == dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj, 615 dp, &dp->dp_origin_snap)); 616 dsl_dataset_rele(ds, FTAG); 617 rw_exit(&dp->dp_config_rwlock); 618 } 619 620 taskq_t * 621 dsl_pool_vnrele_taskq(dsl_pool_t *dp) 622 { 623 return (dp->dp_vnrele_taskq); 624 } 625