1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 25 * Copyright (c) 2012, 2020 by Delphix. All rights reserved. 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 28 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 29 * Copyright (c) 2015, STRATO AG, Inc. All rights reserved. 30 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 31 * Copyright 2017 Nexenta Systems, Inc. 32 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved. 33 * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. 34 * Copyright (c) 2019, Klara Inc. 35 * Copyright (c) 2019, Allan Jude 36 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP. 37 * Copyright (c) 2025, Rob Norris <robn@despairlabs.com> 38 */ 39 40 /* Portions Copyright 2010 Robert Milkowski */ 41 42 #include <sys/cred.h> 43 #include <sys/zfs_context.h> 44 #include <sys/dmu_objset.h> 45 #include <sys/dsl_dir.h> 46 #include <sys/dsl_dataset.h> 47 #include <sys/dsl_prop.h> 48 #include <sys/dsl_pool.h> 49 #include <sys/dsl_synctask.h> 50 #include <sys/dsl_deleg.h> 51 #include <sys/dnode.h> 52 #include <sys/dbuf.h> 53 #include <sys/zvol.h> 54 #include <sys/dmu_tx.h> 55 #include <sys/zap.h> 56 #include <sys/zil.h> 57 #include <sys/dmu_impl.h> 58 #include <sys/zfs_ioctl.h> 59 #include <sys/sa.h> 60 #include <sys/zfs_onexit.h> 61 #include <sys/dsl_destroy.h> 62 #include <sys/vdev.h> 63 #include <sys/zfeature.h> 64 #include <sys/policy.h> 65 #include <sys/spa_impl.h> 66 #include <sys/dmu_recv.h> 67 #include <sys/zfs_project.h> 68 #include "zfs_namecheck.h" 69 #include <sys/vdev_impl.h> 70 #include <sys/arc.h> 71 #include <cityhash.h> 72 #include <sys/cred.h> 73 74 /* 75 * Needed to close a window in dnode_move() that allows the objset to be freed 76 * before it can be safely accessed. 77 */ 78 krwlock_t os_lock; 79 80 /* 81 * Tunable to overwrite the maximum number of threads for the parallelization 82 * of dmu_objset_find_dp, needed to speed up the import of pools with many 83 * datasets. 84 * Default is 4 times the number of leaf vdevs. 85 */ 86 static const int dmu_find_threads = 0; 87 88 /* 89 * Backfill lower metadnode objects after this many have been freed. 90 * Backfilling negatively impacts object creation rates, so only do it 91 * if there are enough holes to fill. 92 */ 93 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 94 95 static const char *upgrade_tag = "upgrade_tag"; 96 97 static void dmu_objset_find_dp_cb(void *arg); 98 99 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 100 static void dmu_objset_upgrade_stop(objset_t *os); 101 102 void 103 dmu_objset_init(void) 104 { 105 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 106 } 107 108 void 109 dmu_objset_fini(void) 110 { 111 rw_destroy(&os_lock); 112 } 113 114 spa_t * 115 dmu_objset_spa(objset_t *os) 116 { 117 return (os->os_spa); 118 } 119 120 zilog_t * 121 dmu_objset_zil(objset_t *os) 122 { 123 return (os->os_zil); 124 } 125 126 dsl_pool_t * 127 dmu_objset_pool(objset_t *os) 128 { 129 dsl_dataset_t *ds; 130 131 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 132 return (ds->ds_dir->dd_pool); 133 else 134 return (spa_get_dsl(os->os_spa)); 135 } 136 137 dsl_dataset_t * 138 dmu_objset_ds(objset_t *os) 139 { 140 return (os->os_dsl_dataset); 141 } 142 143 dmu_objset_type_t 144 dmu_objset_type(objset_t *os) 145 { 146 return (os->os_phys->os_type); 147 } 148 149 void 150 dmu_objset_name(objset_t *os, char *buf) 151 { 152 dsl_dataset_name(os->os_dsl_dataset, buf); 153 } 154 155 uint64_t 156 dmu_objset_id(objset_t *os) 157 { 158 dsl_dataset_t *ds = os->os_dsl_dataset; 159 160 return (ds ? ds->ds_object : 0); 161 } 162 163 uint64_t 164 dmu_objset_dnodesize(objset_t *os) 165 { 166 return (os->os_dnodesize); 167 } 168 169 zfs_sync_type_t 170 dmu_objset_syncprop(objset_t *os) 171 { 172 return (os->os_sync); 173 } 174 175 zfs_logbias_op_t 176 dmu_objset_logbias(objset_t *os) 177 { 178 return (os->os_logbias); 179 } 180 181 static void 182 checksum_changed_cb(void *arg, uint64_t newval) 183 { 184 objset_t *os = arg; 185 186 /* 187 * Inheritance should have been done by now. 188 */ 189 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 190 191 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 192 } 193 194 static void 195 compression_changed_cb(void *arg, uint64_t newval) 196 { 197 objset_t *os = arg; 198 199 /* 200 * Inheritance and range checking should have been done by now. 201 */ 202 ASSERT(newval != ZIO_COMPRESS_INHERIT); 203 204 os->os_compress = zio_compress_select(os->os_spa, 205 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 206 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 207 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 208 } 209 210 static void 211 copies_changed_cb(void *arg, uint64_t newval) 212 { 213 objset_t *os = arg; 214 215 /* 216 * Inheritance and range checking should have been done by now. 217 */ 218 ASSERT(newval > 0); 219 ASSERT(newval <= spa_max_replication(os->os_spa)); 220 221 os->os_copies = newval; 222 } 223 224 static void 225 dedup_changed_cb(void *arg, uint64_t newval) 226 { 227 objset_t *os = arg; 228 spa_t *spa = os->os_spa; 229 enum zio_checksum checksum; 230 231 /* 232 * Inheritance should have been done by now. 233 */ 234 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 235 236 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 237 238 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 239 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 240 } 241 242 static void 243 primary_cache_changed_cb(void *arg, uint64_t newval) 244 { 245 objset_t *os = arg; 246 247 /* 248 * Inheritance and range checking should have been done by now. 249 */ 250 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 251 newval == ZFS_CACHE_METADATA); 252 253 os->os_primary_cache = newval; 254 } 255 256 static void 257 secondary_cache_changed_cb(void *arg, uint64_t newval) 258 { 259 objset_t *os = arg; 260 261 /* 262 * Inheritance and range checking should have been done by now. 263 */ 264 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 265 newval == ZFS_CACHE_METADATA); 266 267 os->os_secondary_cache = newval; 268 } 269 270 static void 271 prefetch_changed_cb(void *arg, uint64_t newval) 272 { 273 objset_t *os = arg; 274 275 /* 276 * Inheritance should have been done by now. 277 */ 278 ASSERT(newval == ZFS_PREFETCH_ALL || newval == ZFS_PREFETCH_NONE || 279 newval == ZFS_PREFETCH_METADATA); 280 os->os_prefetch = newval; 281 } 282 283 static void 284 sync_changed_cb(void *arg, uint64_t newval) 285 { 286 objset_t *os = arg; 287 288 /* 289 * Inheritance and range checking should have been done by now. 290 */ 291 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 292 newval == ZFS_SYNC_DISABLED); 293 294 os->os_sync = newval; 295 if (os->os_zil) 296 zil_set_sync(os->os_zil, newval); 297 } 298 299 static void 300 redundant_metadata_changed_cb(void *arg, uint64_t newval) 301 { 302 objset_t *os = arg; 303 304 /* 305 * Inheritance and range checking should have been done by now. 306 */ 307 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 308 newval == ZFS_REDUNDANT_METADATA_MOST || 309 newval == ZFS_REDUNDANT_METADATA_SOME || 310 newval == ZFS_REDUNDANT_METADATA_NONE); 311 312 os->os_redundant_metadata = newval; 313 } 314 315 static void 316 dnodesize_changed_cb(void *arg, uint64_t newval) 317 { 318 objset_t *os = arg; 319 320 switch (newval) { 321 case ZFS_DNSIZE_LEGACY: 322 os->os_dnodesize = DNODE_MIN_SIZE; 323 break; 324 case ZFS_DNSIZE_AUTO: 325 /* 326 * Choose a dnode size that will work well for most 327 * workloads if the user specified "auto". Future code 328 * improvements could dynamically select a dnode size 329 * based on observed workload patterns. 330 */ 331 os->os_dnodesize = DNODE_MIN_SIZE * 2; 332 break; 333 case ZFS_DNSIZE_1K: 334 case ZFS_DNSIZE_2K: 335 case ZFS_DNSIZE_4K: 336 case ZFS_DNSIZE_8K: 337 case ZFS_DNSIZE_16K: 338 os->os_dnodesize = newval; 339 break; 340 } 341 } 342 343 static void 344 smallblk_changed_cb(void *arg, uint64_t newval) 345 { 346 objset_t *os = arg; 347 348 os->os_zpl_special_smallblock = newval; 349 } 350 351 static void 352 direct_changed_cb(void *arg, uint64_t newval) 353 { 354 objset_t *os = arg; 355 356 /* 357 * Inheritance and range checking should have been done by now. 358 */ 359 ASSERT(newval == ZFS_DIRECT_DISABLED || newval == ZFS_DIRECT_STANDARD || 360 newval == ZFS_DIRECT_ALWAYS); 361 362 os->os_direct = newval; 363 } 364 365 static void 366 logbias_changed_cb(void *arg, uint64_t newval) 367 { 368 objset_t *os = arg; 369 370 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 371 newval == ZFS_LOGBIAS_THROUGHPUT); 372 os->os_logbias = newval; 373 if (os->os_zil) 374 zil_set_logbias(os->os_zil, newval); 375 } 376 377 static void 378 recordsize_changed_cb(void *arg, uint64_t newval) 379 { 380 objset_t *os = arg; 381 382 os->os_recordsize = newval; 383 } 384 385 void 386 dmu_objset_byteswap(void *buf, size_t size) 387 { 388 objset_phys_t *osp = buf; 389 390 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 391 size == sizeof (objset_phys_t)); 392 dnode_byteswap(&osp->os_meta_dnode); 393 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 394 osp->os_type = BSWAP_64(osp->os_type); 395 osp->os_flags = BSWAP_64(osp->os_flags); 396 if (size >= OBJSET_PHYS_SIZE_V2) { 397 dnode_byteswap(&osp->os_userused_dnode); 398 dnode_byteswap(&osp->os_groupused_dnode); 399 if (size >= sizeof (objset_phys_t)) 400 dnode_byteswap(&osp->os_projectused_dnode); 401 } 402 } 403 404 /* 405 * Runs cityhash on the objset_t pointer and the object number. 406 */ 407 static uint64_t 408 dnode_hash(const objset_t *os, uint64_t obj) 409 { 410 uintptr_t osv = (uintptr_t)os; 411 return (cityhash2((uint64_t)osv, obj)); 412 } 413 414 static unsigned int 415 dnode_multilist_index_func(multilist_t *ml, void *obj) 416 { 417 dnode_t *dn = obj; 418 419 /* 420 * The low order bits of the hash value are thought to be 421 * distributed evenly. Otherwise, in the case that the multilist 422 * has a power of two number of sublists, each sublists' usage 423 * would not be evenly distributed. In this context full 64bit 424 * division would be a waste of time, so limit it to 32 bits. 425 */ 426 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 427 multilist_get_num_sublists(ml)); 428 } 429 430 static inline boolean_t 431 dmu_os_is_l2cacheable(objset_t *os) 432 { 433 if (os->os_secondary_cache == ZFS_CACHE_ALL || 434 os->os_secondary_cache == ZFS_CACHE_METADATA) { 435 if (l2arc_exclude_special == 0) 436 return (B_TRUE); 437 438 blkptr_t *bp = os->os_rootbp; 439 if (bp == NULL || BP_IS_HOLE(bp)) 440 return (B_FALSE); 441 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva); 442 vdev_t *rvd = os->os_spa->spa_root_vdev; 443 vdev_t *vd = NULL; 444 445 if (vdev < rvd->vdev_children) 446 vd = rvd->vdev_child[vdev]; 447 448 if (vd == NULL) 449 return (B_TRUE); 450 451 if (vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL && 452 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) 453 return (B_TRUE); 454 } 455 return (B_FALSE); 456 } 457 458 /* 459 * Instantiates the objset_t in-memory structure corresponding to the 460 * objset_phys_t that's pointed to by the specified blkptr_t. 461 */ 462 int 463 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 464 objset_t **osp) 465 { 466 objset_t *os; 467 int i, err; 468 469 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 470 ASSERT(!BP_IS_REDACTED(bp)); 471 472 /* 473 * We need the pool config lock to get properties. 474 */ 475 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 476 477 /* 478 * The $ORIGIN dataset (if it exists) doesn't have an associated 479 * objset, so there's no reason to open it. The $ORIGIN dataset 480 * will not exist on pools older than SPA_VERSION_ORIGIN. 481 */ 482 if (ds != NULL && spa_get_dsl(spa) != NULL && 483 spa_get_dsl(spa)->dp_origin_snap != NULL) { 484 ASSERT3P(ds->ds_dir, !=, 485 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 486 } 487 488 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 489 os->os_dsl_dataset = ds; 490 os->os_spa = spa; 491 os->os_rootbp = bp; 492 if (!BP_IS_HOLE(os->os_rootbp)) { 493 arc_flags_t aflags = ARC_FLAG_WAIT; 494 zbookmark_phys_t zb; 495 int size; 496 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL; 497 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 498 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 499 500 if (dmu_os_is_l2cacheable(os)) 501 aflags |= ARC_FLAG_L2CACHE; 502 503 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 504 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 505 ASSERT(BP_IS_AUTHENTICATED(bp)); 506 zio_flags |= ZIO_FLAG_RAW; 507 } 508 509 dprintf_bp(os->os_rootbp, "reading %s", ""); 510 err = arc_read(NULL, spa, os->os_rootbp, 511 arc_getbuf_func, &os->os_phys_buf, 512 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 513 if (err != 0) { 514 kmem_free(os, sizeof (objset_t)); 515 /* convert checksum errors into IO errors */ 516 if (err == ECKSUM) 517 err = SET_ERROR(EIO); 518 return (err); 519 } 520 521 if (spa_version(spa) < SPA_VERSION_USERSPACE) 522 size = OBJSET_PHYS_SIZE_V1; 523 else if (!spa_feature_is_enabled(spa, 524 SPA_FEATURE_PROJECT_QUOTA)) 525 size = OBJSET_PHYS_SIZE_V2; 526 else 527 size = sizeof (objset_phys_t); 528 529 /* Increase the blocksize if we are permitted. */ 530 if (arc_buf_size(os->os_phys_buf) < size) { 531 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 532 ARC_BUFC_METADATA, size); 533 memset(buf->b_data, 0, size); 534 memcpy(buf->b_data, os->os_phys_buf->b_data, 535 arc_buf_size(os->os_phys_buf)); 536 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 537 os->os_phys_buf = buf; 538 } 539 540 os->os_phys = os->os_phys_buf->b_data; 541 os->os_flags = os->os_phys->os_flags; 542 } else { 543 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 544 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 545 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 546 ARC_BUFC_METADATA, size); 547 os->os_phys = os->os_phys_buf->b_data; 548 memset(os->os_phys, 0, size); 549 } 550 /* 551 * These properties will be filled in by the logic in zfs_get_zplprop() 552 * when they are queried for the first time. 553 */ 554 os->os_version = OBJSET_PROP_UNINITIALIZED; 555 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 556 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 557 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 558 559 /* 560 * Note: the changed_cb will be called once before the register 561 * func returns, thus changing the checksum/compression from the 562 * default (fletcher2/off). Snapshots don't need to know about 563 * checksum/compression/copies. 564 */ 565 if (ds != NULL) { 566 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 567 568 err = dsl_prop_register(ds, 569 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 570 primary_cache_changed_cb, os); 571 if (err == 0) { 572 err = dsl_prop_register(ds, 573 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 574 secondary_cache_changed_cb, os); 575 } 576 if (err == 0) { 577 err = dsl_prop_register(ds, 578 zfs_prop_to_name(ZFS_PROP_PREFETCH), 579 prefetch_changed_cb, os); 580 } 581 if (!ds->ds_is_snapshot) { 582 if (err == 0) { 583 err = dsl_prop_register(ds, 584 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 585 checksum_changed_cb, os); 586 } 587 if (err == 0) { 588 err = dsl_prop_register(ds, 589 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 590 compression_changed_cb, os); 591 } 592 if (err == 0) { 593 err = dsl_prop_register(ds, 594 zfs_prop_to_name(ZFS_PROP_COPIES), 595 copies_changed_cb, os); 596 } 597 if (err == 0) { 598 err = dsl_prop_register(ds, 599 zfs_prop_to_name(ZFS_PROP_DEDUP), 600 dedup_changed_cb, os); 601 } 602 if (err == 0) { 603 err = dsl_prop_register(ds, 604 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 605 logbias_changed_cb, os); 606 } 607 if (err == 0) { 608 err = dsl_prop_register(ds, 609 zfs_prop_to_name(ZFS_PROP_SYNC), 610 sync_changed_cb, os); 611 } 612 if (err == 0) { 613 err = dsl_prop_register(ds, 614 zfs_prop_to_name( 615 ZFS_PROP_REDUNDANT_METADATA), 616 redundant_metadata_changed_cb, os); 617 } 618 if (err == 0) { 619 err = dsl_prop_register(ds, 620 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 621 recordsize_changed_cb, os); 622 } 623 if (err == 0) { 624 err = dsl_prop_register(ds, 625 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 626 dnodesize_changed_cb, os); 627 } 628 if (err == 0) { 629 err = dsl_prop_register(ds, 630 zfs_prop_to_name( 631 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 632 smallblk_changed_cb, os); 633 } 634 if (err == 0) { 635 err = dsl_prop_register(ds, 636 zfs_prop_to_name(ZFS_PROP_DIRECT), 637 direct_changed_cb, os); 638 } 639 } 640 if (err != 0) { 641 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 642 kmem_free(os, sizeof (objset_t)); 643 return (err); 644 } 645 } else { 646 /* It's the meta-objset. */ 647 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 648 os->os_compress = ZIO_COMPRESS_ON; 649 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 650 os->os_encrypted = B_FALSE; 651 os->os_copies = spa_max_replication(spa); 652 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 653 os->os_dedup_verify = B_FALSE; 654 os->os_logbias = ZFS_LOGBIAS_LATENCY; 655 os->os_sync = ZFS_SYNC_STANDARD; 656 os->os_primary_cache = ZFS_CACHE_ALL; 657 os->os_secondary_cache = ZFS_CACHE_ALL; 658 os->os_dnodesize = DNODE_MIN_SIZE; 659 os->os_prefetch = ZFS_PREFETCH_ALL; 660 } 661 662 if (ds == NULL || !ds->ds_is_snapshot) 663 os->os_zil_header = os->os_phys->os_zil_header; 664 os->os_zil = zil_alloc(os, &os->os_zil_header); 665 666 for (i = 0; i < TXG_SIZE; i++) { 667 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 668 offsetof(dnode_t, dn_dirty_link[i]), 669 dnode_multilist_index_func); 670 } 671 list_create(&os->os_dnodes, sizeof (dnode_t), 672 offsetof(dnode_t, dn_link)); 673 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 674 offsetof(dmu_buf_impl_t, db_link)); 675 676 list_link_init(&os->os_evicting_node); 677 678 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 679 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 680 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 681 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 682 os->os_obj_next_percpu_len = boot_ncpus; 683 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 684 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 685 686 dnode_special_open(os, &os->os_phys->os_meta_dnode, 687 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 688 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 689 dnode_special_open(os, &os->os_phys->os_userused_dnode, 690 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 691 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 692 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 693 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 694 dnode_special_open(os, 695 &os->os_phys->os_projectused_dnode, 696 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 697 } 698 699 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 700 701 *osp = os; 702 return (0); 703 } 704 705 int 706 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 707 { 708 int err = 0; 709 710 /* 711 * We need the pool_config lock to manipulate the dsl_dataset_t. 712 * Even if the dataset is long-held, we need the pool_config lock 713 * to open the objset, as it needs to get properties. 714 */ 715 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 716 717 mutex_enter(&ds->ds_opening_lock); 718 if (ds->ds_objset == NULL) { 719 objset_t *os; 720 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 721 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 722 ds, dsl_dataset_get_blkptr(ds), &os); 723 rrw_exit(&ds->ds_bp_rwlock, FTAG); 724 725 if (err == 0) { 726 mutex_enter(&ds->ds_lock); 727 ASSERT(ds->ds_objset == NULL); 728 ds->ds_objset = os; 729 mutex_exit(&ds->ds_lock); 730 } 731 } 732 *osp = ds->ds_objset; 733 mutex_exit(&ds->ds_opening_lock); 734 return (err); 735 } 736 737 /* 738 * Holds the pool while the objset is held. Therefore only one objset 739 * can be held at a time. 740 */ 741 int 742 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag, 743 objset_t **osp) 744 { 745 dsl_pool_t *dp; 746 dsl_dataset_t *ds; 747 int err; 748 ds_hold_flags_t flags; 749 750 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 751 err = dsl_pool_hold(name, tag, &dp); 752 if (err != 0) 753 return (err); 754 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 755 if (err != 0) { 756 dsl_pool_rele(dp, tag); 757 return (err); 758 } 759 760 err = dmu_objset_from_ds(ds, osp); 761 if (err != 0) { 762 dsl_dataset_rele_flags(ds, flags, tag); 763 dsl_pool_rele(dp, tag); 764 } 765 766 return (err); 767 } 768 769 int 770 dmu_objset_hold(const char *name, const void *tag, objset_t **osp) 771 { 772 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 773 } 774 775 static int 776 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 777 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 778 { 779 (void) tag; 780 781 int err = dmu_objset_from_ds(ds, osp); 782 if (err != 0) { 783 return (err); 784 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 785 return (SET_ERROR(EINVAL)); 786 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 787 return (SET_ERROR(EROFS)); 788 } else if (!readonly && decrypt && 789 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 790 return (SET_ERROR(EROFS)); 791 } 792 793 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 794 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 795 zbookmark_phys_t zb; 796 797 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 798 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 799 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 800 &zb, B_FALSE); 801 if (err != 0) 802 return (err); 803 804 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 805 } 806 807 return (0); 808 } 809 810 /* 811 * dsl_pool must not be held when this is called. 812 * Upon successful return, there will be a longhold on the dataset, 813 * and the dsl_pool will not be held. 814 */ 815 int 816 dmu_objset_own(const char *name, dmu_objset_type_t type, 817 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 818 { 819 dsl_pool_t *dp; 820 dsl_dataset_t *ds; 821 int err; 822 ds_hold_flags_t flags; 823 824 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 825 err = dsl_pool_hold(name, FTAG, &dp); 826 if (err != 0) 827 return (err); 828 err = dsl_dataset_own(dp, name, flags, tag, &ds); 829 if (err != 0) { 830 dsl_pool_rele(dp, FTAG); 831 return (err); 832 } 833 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 834 if (err != 0) { 835 dsl_dataset_disown(ds, flags, tag); 836 dsl_pool_rele(dp, FTAG); 837 return (err); 838 } 839 840 /* 841 * User accounting requires the dataset to be decrypted and rw. 842 * We also don't begin user accounting during claiming to help 843 * speed up pool import times and to keep this txg reserved 844 * completely for recovery work. 845 */ 846 if (!readonly && !dp->dp_spa->spa_claiming && 847 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 848 if (dmu_objset_userobjspace_upgradable(*osp) || 849 dmu_objset_projectquota_upgradable(*osp)) { 850 dmu_objset_id_quota_upgrade(*osp); 851 } else if (dmu_objset_userused_enabled(*osp)) { 852 dmu_objset_userspace_upgrade(*osp); 853 } 854 } 855 856 dsl_pool_rele(dp, FTAG); 857 return (0); 858 } 859 860 int 861 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 862 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 863 { 864 dsl_dataset_t *ds; 865 int err; 866 ds_hold_flags_t flags; 867 868 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 869 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 870 if (err != 0) 871 return (err); 872 873 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 874 if (err != 0) { 875 dsl_dataset_disown(ds, flags, tag); 876 return (err); 877 } 878 879 return (0); 880 } 881 882 void 883 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag) 884 { 885 ds_hold_flags_t flags; 886 dsl_pool_t *dp = dmu_objset_pool(os); 887 888 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 889 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 890 dsl_pool_rele(dp, tag); 891 } 892 893 void 894 dmu_objset_rele(objset_t *os, const void *tag) 895 { 896 dmu_objset_rele_flags(os, B_FALSE, tag); 897 } 898 899 /* 900 * When we are called, os MUST refer to an objset associated with a dataset 901 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 902 * == tag. We will then release and reacquire ownership of the dataset while 903 * holding the pool config_rwlock to avoid intervening namespace or ownership 904 * changes may occur. 905 * 906 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 907 * release the hold on its dataset and acquire a new one on the dataset of the 908 * same name so that it can be partially torn down and reconstructed. 909 */ 910 void 911 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 912 boolean_t decrypt, const void *tag) 913 { 914 dsl_pool_t *dp; 915 char name[ZFS_MAX_DATASET_NAME_LEN]; 916 ds_hold_flags_t flags; 917 918 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 919 VERIFY3P(ds, !=, NULL); 920 VERIFY3P(ds->ds_owner, ==, tag); 921 VERIFY(dsl_dataset_long_held(ds)); 922 923 dsl_dataset_name(ds, name); 924 dp = ds->ds_dir->dd_pool; 925 dsl_pool_config_enter(dp, FTAG); 926 dsl_dataset_disown(ds, flags, tag); 927 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 928 dsl_pool_config_exit(dp, FTAG); 929 } 930 931 void 932 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag) 933 { 934 ds_hold_flags_t flags; 935 936 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 937 /* 938 * Stop upgrading thread 939 */ 940 dmu_objset_upgrade_stop(os); 941 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 942 } 943 944 void 945 dmu_objset_evict_dbufs(objset_t *os) 946 { 947 dnode_t *dn_marker; 948 dnode_t *dn; 949 950 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 951 952 mutex_enter(&os->os_lock); 953 dn = list_head(&os->os_dnodes); 954 while (dn != NULL) { 955 /* 956 * Skip dnodes without holds. We have to do this dance 957 * because dnode_add_ref() only works if there is already a 958 * hold. If the dnode has no holds, then it has no dbufs. 959 */ 960 if (dnode_add_ref(dn, FTAG)) { 961 list_insert_after(&os->os_dnodes, dn, dn_marker); 962 mutex_exit(&os->os_lock); 963 964 dnode_evict_dbufs(dn); 965 dnode_rele(dn, FTAG); 966 967 mutex_enter(&os->os_lock); 968 dn = list_next(&os->os_dnodes, dn_marker); 969 list_remove(&os->os_dnodes, dn_marker); 970 } else { 971 dn = list_next(&os->os_dnodes, dn); 972 } 973 } 974 mutex_exit(&os->os_lock); 975 976 kmem_free(dn_marker, sizeof (dnode_t)); 977 978 if (DMU_USERUSED_DNODE(os) != NULL) { 979 if (DMU_PROJECTUSED_DNODE(os) != NULL) 980 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 981 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 982 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 983 } 984 dnode_evict_dbufs(DMU_META_DNODE(os)); 985 } 986 987 /* 988 * Objset eviction processing is split into into two pieces. 989 * The first marks the objset as evicting, evicts any dbufs that 990 * have a refcount of zero, and then queues up the objset for the 991 * second phase of eviction. Once os->os_dnodes has been cleared by 992 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 993 * The second phase closes the special dnodes, dequeues the objset from 994 * the list of those undergoing eviction, and finally frees the objset. 995 * 996 * NOTE: Due to asynchronous eviction processing (invocation of 997 * dnode_buf_pageout()), it is possible for the meta dnode for the 998 * objset to have no holds even though os->os_dnodes is not empty. 999 */ 1000 void 1001 dmu_objset_evict(objset_t *os) 1002 { 1003 dsl_dataset_t *ds = os->os_dsl_dataset; 1004 1005 for (int t = 0; t < TXG_SIZE; t++) 1006 ASSERT(!dmu_objset_is_dirty(os, t)); 1007 1008 if (ds) 1009 dsl_prop_unregister_all(ds, os); 1010 1011 if (os->os_sa) 1012 sa_tear_down(os); 1013 1014 dmu_objset_evict_dbufs(os); 1015 1016 mutex_enter(&os->os_lock); 1017 spa_evicting_os_register(os->os_spa, os); 1018 if (list_is_empty(&os->os_dnodes)) { 1019 mutex_exit(&os->os_lock); 1020 dmu_objset_evict_done(os); 1021 } else { 1022 mutex_exit(&os->os_lock); 1023 } 1024 1025 1026 } 1027 1028 void 1029 dmu_objset_evict_done(objset_t *os) 1030 { 1031 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 1032 1033 dnode_special_close(&os->os_meta_dnode); 1034 if (DMU_USERUSED_DNODE(os)) { 1035 if (DMU_PROJECTUSED_DNODE(os)) 1036 dnode_special_close(&os->os_projectused_dnode); 1037 dnode_special_close(&os->os_userused_dnode); 1038 dnode_special_close(&os->os_groupused_dnode); 1039 } 1040 zil_free(os->os_zil); 1041 1042 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 1043 1044 /* 1045 * This is a barrier to prevent the objset from going away in 1046 * dnode_move() until we can safely ensure that the objset is still in 1047 * use. We consider the objset valid before the barrier and invalid 1048 * after the barrier. 1049 */ 1050 rw_enter(&os_lock, RW_READER); 1051 rw_exit(&os_lock); 1052 1053 kmem_free(os->os_obj_next_percpu, 1054 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1055 1056 mutex_destroy(&os->os_lock); 1057 mutex_destroy(&os->os_userused_lock); 1058 mutex_destroy(&os->os_obj_lock); 1059 mutex_destroy(&os->os_user_ptr_lock); 1060 mutex_destroy(&os->os_upgrade_lock); 1061 for (int i = 0; i < TXG_SIZE; i++) 1062 multilist_destroy(&os->os_dirty_dnodes[i]); 1063 spa_evicting_os_deregister(os->os_spa, os); 1064 kmem_free(os, sizeof (objset_t)); 1065 } 1066 1067 inode_timespec_t 1068 dmu_objset_snap_cmtime(objset_t *os) 1069 { 1070 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1071 } 1072 1073 objset_t * 1074 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1075 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1076 { 1077 objset_t *os; 1078 dnode_t *mdn; 1079 1080 ASSERT(dmu_tx_is_syncing(tx)); 1081 1082 if (blksz == 0) 1083 blksz = DNODE_BLOCK_SIZE; 1084 if (ibs == 0) 1085 ibs = DN_MAX_INDBLKSHIFT; 1086 1087 if (ds != NULL) 1088 VERIFY0(dmu_objset_from_ds(ds, &os)); 1089 else 1090 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1091 1092 mdn = DMU_META_DNODE(os); 1093 1094 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1095 DNODE_MIN_SLOTS, tx); 1096 1097 /* 1098 * We don't want to have to increase the meta-dnode's nlevels 1099 * later, because then we could do it in quiescing context while 1100 * we are also accessing it in open context. 1101 * 1102 * This precaution is not necessary for the MOS (ds == NULL), 1103 * because the MOS is only updated in syncing context. 1104 * This is most fortunate: the MOS is the only objset that 1105 * needs to be synced multiple times as spa_sync() iterates 1106 * to convergence, so minimizing its dn_nlevels matters. 1107 */ 1108 if (ds != NULL) { 1109 if (levels == 0) { 1110 levels = 1; 1111 1112 /* 1113 * Determine the number of levels necessary for the 1114 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1115 * that in order to ensure that we do not overflow 1116 * 64 bits, there has to be a nlevels that gives us a 1117 * number of blocks > DN_MAX_OBJECT but < 2^64. 1118 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1119 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1120 * (16). 1121 */ 1122 while ((uint64_t)mdn->dn_nblkptr << 1123 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1124 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1125 DN_MAX_OBJECT) 1126 levels++; 1127 } 1128 1129 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1130 mdn->dn_nlevels = levels; 1131 } 1132 1133 ASSERT(type != DMU_OST_NONE); 1134 ASSERT(type != DMU_OST_ANY); 1135 ASSERT(type < DMU_OST_NUMTYPES); 1136 os->os_phys->os_type = type; 1137 1138 /* 1139 * Enable user accounting if it is enabled and this is not an 1140 * encrypted receive. 1141 */ 1142 if (dmu_objset_userused_enabled(os) && 1143 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1144 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1145 if (dmu_objset_userobjused_enabled(os)) { 1146 ASSERT3P(ds, !=, NULL); 1147 ds->ds_feature_activation[ 1148 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1149 os->os_phys->os_flags |= 1150 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1151 } 1152 if (dmu_objset_projectquota_enabled(os)) { 1153 ASSERT3P(ds, !=, NULL); 1154 ds->ds_feature_activation[ 1155 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1156 os->os_phys->os_flags |= 1157 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1158 } 1159 os->os_flags = os->os_phys->os_flags; 1160 } 1161 1162 dsl_dataset_dirty(ds, tx); 1163 1164 return (os); 1165 } 1166 1167 /* called from dsl for meta-objset */ 1168 objset_t * 1169 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1170 dmu_objset_type_t type, dmu_tx_t *tx) 1171 { 1172 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1173 } 1174 1175 typedef struct dmu_objset_create_arg { 1176 const char *doca_name; 1177 cred_t *doca_cred; 1178 void (*doca_userfunc)(objset_t *os, void *arg, 1179 cred_t *cr, dmu_tx_t *tx); 1180 void *doca_userarg; 1181 dmu_objset_type_t doca_type; 1182 uint64_t doca_flags; 1183 dsl_crypto_params_t *doca_dcp; 1184 } dmu_objset_create_arg_t; 1185 1186 static int 1187 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1188 { 1189 dmu_objset_create_arg_t *doca = arg; 1190 dsl_pool_t *dp = dmu_tx_pool(tx); 1191 dsl_dir_t *pdd; 1192 dsl_dataset_t *parentds; 1193 objset_t *parentos; 1194 const char *tail; 1195 int error; 1196 1197 if (strchr(doca->doca_name, '@') != NULL) 1198 return (SET_ERROR(EINVAL)); 1199 1200 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1201 return (SET_ERROR(ENAMETOOLONG)); 1202 1203 if (dataset_nestcheck(doca->doca_name) != 0) 1204 return (SET_ERROR(ENAMETOOLONG)); 1205 1206 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1207 if (error != 0) 1208 return (error); 1209 if (tail == NULL) { 1210 dsl_dir_rele(pdd, FTAG); 1211 return (SET_ERROR(EEXIST)); 1212 } 1213 1214 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1215 if (error != 0) { 1216 dsl_dir_rele(pdd, FTAG); 1217 return (error); 1218 } 1219 1220 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1221 doca->doca_cred); 1222 if (error != 0) { 1223 dsl_dir_rele(pdd, FTAG); 1224 return (error); 1225 } 1226 1227 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1228 error = dsl_dataset_hold_obj(pdd->dd_pool, 1229 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1230 if (error != 0) { 1231 dsl_dir_rele(pdd, FTAG); 1232 return (error); 1233 } 1234 error = dmu_objset_from_ds(parentds, &parentos); 1235 if (error != 0) { 1236 dsl_dataset_rele(parentds, FTAG); 1237 dsl_dir_rele(pdd, FTAG); 1238 return (error); 1239 } 1240 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1241 dsl_dataset_rele(parentds, FTAG); 1242 dsl_dir_rele(pdd, FTAG); 1243 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1244 } 1245 dsl_dataset_rele(parentds, FTAG); 1246 dsl_dir_rele(pdd, FTAG); 1247 1248 return (error); 1249 } 1250 1251 static void 1252 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1253 { 1254 dmu_objset_create_arg_t *doca = arg; 1255 dsl_pool_t *dp = dmu_tx_pool(tx); 1256 spa_t *spa = dp->dp_spa; 1257 dsl_dir_t *pdd; 1258 const char *tail; 1259 dsl_dataset_t *ds; 1260 uint64_t obj; 1261 blkptr_t *bp; 1262 objset_t *os; 1263 zio_t *rzio; 1264 1265 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1266 1267 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1268 doca->doca_cred, doca->doca_dcp, tx); 1269 1270 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1271 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1272 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1273 bp = dsl_dataset_get_blkptr(ds); 1274 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1275 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1276 1277 if (doca->doca_userfunc != NULL) { 1278 doca->doca_userfunc(os, doca->doca_userarg, 1279 doca->doca_cred, tx); 1280 } 1281 1282 /* 1283 * The doca_userfunc() may write out some data that needs to be 1284 * encrypted if the dataset is encrypted (specifically the root 1285 * directory). This data must be written out before the encryption 1286 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1287 * I/O to occur immediately by invoking the relevant sections of 1288 * dsl_pool_sync(). 1289 */ 1290 if (os->os_encrypted) { 1291 dsl_dataset_t *tmpds = NULL; 1292 boolean_t need_sync_done = B_FALSE; 1293 1294 mutex_enter(&ds->ds_lock); 1295 ds->ds_owner = FTAG; 1296 mutex_exit(&ds->ds_lock); 1297 1298 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1299 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1300 tx->tx_txg); 1301 if (tmpds != NULL) { 1302 dsl_dataset_sync(ds, rzio, tx); 1303 need_sync_done = B_TRUE; 1304 } 1305 VERIFY0(zio_wait(rzio)); 1306 1307 dmu_objset_sync_done(os, tx); 1308 taskq_wait(dp->dp_sync_taskq); 1309 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1310 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1311 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1312 } 1313 1314 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1315 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1316 tx->tx_txg); 1317 if (tmpds != NULL) { 1318 dmu_buf_rele(ds->ds_dbuf, ds); 1319 dsl_dataset_sync(ds, rzio, tx); 1320 } 1321 VERIFY0(zio_wait(rzio)); 1322 1323 if (need_sync_done) { 1324 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1325 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1326 dsl_dataset_sync_done(ds, tx); 1327 dmu_buf_rele(ds->ds_dbuf, ds); 1328 } 1329 1330 mutex_enter(&ds->ds_lock); 1331 ds->ds_owner = NULL; 1332 mutex_exit(&ds->ds_lock); 1333 } 1334 1335 spa_history_log_internal_ds(ds, "create", tx, " "); 1336 1337 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1338 dsl_dir_rele(pdd, FTAG); 1339 } 1340 1341 int 1342 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1343 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1344 { 1345 dmu_objset_create_arg_t doca; 1346 dsl_crypto_params_t tmp_dcp = { 0 }; 1347 1348 cred_t *cr = CRED(); 1349 crhold(cr); 1350 1351 doca.doca_name = name; 1352 doca.doca_cred = cr; 1353 doca.doca_flags = flags; 1354 doca.doca_userfunc = func; 1355 doca.doca_userarg = arg; 1356 doca.doca_type = type; 1357 1358 /* 1359 * Some callers (mostly for testing) do not provide a dcp on their 1360 * own but various code inside the sync task will require it to be 1361 * allocated. Rather than adding NULL checks throughout this code 1362 * or adding dummy dcp's to all of the callers we simply create a 1363 * dummy one here and use that. This zero dcp will have the same 1364 * effect as asking for inheritance of all encryption params. 1365 */ 1366 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1367 1368 int rv = dsl_sync_task(name, 1369 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1370 6, ZFS_SPACE_CHECK_NORMAL); 1371 1372 if (rv == 0) 1373 zvol_create_minors(name); 1374 1375 crfree(cr); 1376 1377 return (rv); 1378 } 1379 1380 int 1381 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1382 { 1383 int err; 1384 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1385 nvlist_t *snaps = fnvlist_alloc(); 1386 1387 fnvlist_add_boolean(snaps, longsnap); 1388 kmem_strfree(longsnap); 1389 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1390 fnvlist_free(snaps); 1391 return (err); 1392 } 1393 1394 static void 1395 dmu_objset_upgrade_task_cb(void *data) 1396 { 1397 objset_t *os = data; 1398 1399 mutex_enter(&os->os_upgrade_lock); 1400 os->os_upgrade_status = EINTR; 1401 if (!os->os_upgrade_exit) { 1402 int status; 1403 1404 mutex_exit(&os->os_upgrade_lock); 1405 1406 status = os->os_upgrade_cb(os); 1407 1408 mutex_enter(&os->os_upgrade_lock); 1409 1410 os->os_upgrade_status = status; 1411 } 1412 os->os_upgrade_exit = B_TRUE; 1413 os->os_upgrade_id = 0; 1414 mutex_exit(&os->os_upgrade_lock); 1415 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1416 } 1417 1418 static void 1419 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1420 { 1421 if (os->os_upgrade_id != 0) 1422 return; 1423 1424 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1425 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1426 1427 mutex_enter(&os->os_upgrade_lock); 1428 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1429 os->os_upgrade_exit = B_FALSE; 1430 os->os_upgrade_cb = cb; 1431 os->os_upgrade_id = taskq_dispatch( 1432 os->os_spa->spa_upgrade_taskq, 1433 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1434 if (os->os_upgrade_id == TASKQID_INVALID) { 1435 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1436 os->os_upgrade_status = ENOMEM; 1437 } 1438 } else { 1439 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1440 } 1441 mutex_exit(&os->os_upgrade_lock); 1442 } 1443 1444 static void 1445 dmu_objset_upgrade_stop(objset_t *os) 1446 { 1447 mutex_enter(&os->os_upgrade_lock); 1448 os->os_upgrade_exit = B_TRUE; 1449 if (os->os_upgrade_id != 0) { 1450 taskqid_t id = os->os_upgrade_id; 1451 1452 os->os_upgrade_id = 0; 1453 mutex_exit(&os->os_upgrade_lock); 1454 1455 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1456 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1457 } 1458 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1459 } else { 1460 mutex_exit(&os->os_upgrade_lock); 1461 } 1462 } 1463 1464 static void 1465 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1466 { 1467 dnode_t *dn; 1468 1469 while ((dn = multilist_sublist_head(list)) != NULL) { 1470 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1471 ASSERT(dn->dn_dbuf->db_data_pending); 1472 /* 1473 * Initialize dn_zio outside dnode_sync() because the 1474 * meta-dnode needs to set it outside dnode_sync(). 1475 */ 1476 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1477 ASSERT(dn->dn_zio); 1478 1479 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1480 multilist_sublist_remove(list, dn); 1481 1482 /* 1483 * See the comment above dnode_rele_task() for an explanation 1484 * of why this dnode hold is always needed (even when not 1485 * doing user accounting). 1486 */ 1487 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1488 (void) dnode_add_ref(dn, newlist); 1489 multilist_insert(newlist, dn); 1490 1491 dnode_sync(dn, tx); 1492 } 1493 } 1494 1495 static void 1496 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1497 { 1498 (void) abuf; 1499 blkptr_t *bp = zio->io_bp; 1500 objset_t *os = arg; 1501 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1502 uint64_t fill = 0; 1503 1504 ASSERT(!BP_IS_EMBEDDED(bp)); 1505 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1506 ASSERT0(BP_GET_LEVEL(bp)); 1507 1508 /* 1509 * Update rootbp fill count: it should be the number of objects 1510 * allocated in the object set (not counting the "special" 1511 * objects that are stored in the objset_phys_t -- the meta 1512 * dnode and user/group/project accounting objects). 1513 */ 1514 for (int i = 0; i < dnp->dn_nblkptr; i++) 1515 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1516 1517 BP_SET_FILL(bp, fill); 1518 1519 if (os->os_dsl_dataset != NULL) 1520 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1521 *os->os_rootbp = *bp; 1522 if (os->os_dsl_dataset != NULL) 1523 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1524 } 1525 1526 static void 1527 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1528 { 1529 (void) abuf; 1530 blkptr_t *bp = zio->io_bp; 1531 blkptr_t *bp_orig = &zio->io_bp_orig; 1532 objset_t *os = arg; 1533 1534 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1535 ASSERT(BP_EQUAL(bp, bp_orig)); 1536 } else { 1537 dsl_dataset_t *ds = os->os_dsl_dataset; 1538 dmu_tx_t *tx = os->os_synctx; 1539 1540 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1541 dsl_dataset_block_born(ds, bp, tx); 1542 } 1543 kmem_free(bp, sizeof (*bp)); 1544 } 1545 1546 typedef struct sync_objset_arg { 1547 zio_t *soa_zio; 1548 objset_t *soa_os; 1549 dmu_tx_t *soa_tx; 1550 kmutex_t soa_mutex; 1551 int soa_count; 1552 taskq_ent_t soa_tq_ent; 1553 } sync_objset_arg_t; 1554 1555 typedef struct sync_dnodes_arg { 1556 multilist_t *sda_list; 1557 int sda_sublist_idx; 1558 multilist_t *sda_newlist; 1559 sync_objset_arg_t *sda_soa; 1560 } sync_dnodes_arg_t; 1561 1562 static void sync_meta_dnode_task(void *arg); 1563 1564 static void 1565 sync_dnodes_task(void *arg) 1566 { 1567 sync_dnodes_arg_t *sda = arg; 1568 sync_objset_arg_t *soa = sda->sda_soa; 1569 objset_t *os = soa->soa_os; 1570 1571 uint_t allocator = spa_acq_allocator(os->os_spa); 1572 multilist_sublist_t *ms = 1573 multilist_sublist_lock_idx(sda->sda_list, sda->sda_sublist_idx); 1574 1575 dmu_objset_sync_dnodes(ms, soa->soa_tx); 1576 1577 multilist_sublist_unlock(ms); 1578 spa_rel_allocator(os->os_spa, allocator); 1579 1580 kmem_free(sda, sizeof (*sda)); 1581 1582 mutex_enter(&soa->soa_mutex); 1583 ASSERT(soa->soa_count != 0); 1584 if (--soa->soa_count != 0) { 1585 mutex_exit(&soa->soa_mutex); 1586 return; 1587 } 1588 mutex_exit(&soa->soa_mutex); 1589 1590 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1591 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1592 } 1593 1594 /* 1595 * Issue the zio_nowait() for all dirty record zios on the meta dnode, 1596 * then trigger the callback for the zil_sync. This runs once for each 1597 * objset, only after any/all sublists in the objset have been synced. 1598 */ 1599 static void 1600 sync_meta_dnode_task(void *arg) 1601 { 1602 sync_objset_arg_t *soa = arg; 1603 objset_t *os = soa->soa_os; 1604 dmu_tx_t *tx = soa->soa_tx; 1605 int txgoff = tx->tx_txg & TXG_MASK; 1606 dbuf_dirty_record_t *dr; 1607 1608 ASSERT0(soa->soa_count); 1609 1610 list_t *list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1611 while ((dr = list_remove_head(list)) != NULL) { 1612 ASSERT0(dr->dr_dbuf->db_level); 1613 zio_nowait(dr->dr_zio); 1614 } 1615 1616 /* Enable dnode backfill if enough objects have been freed. */ 1617 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1618 os->os_rescan_dnodes = B_TRUE; 1619 os->os_freed_dnodes = 0; 1620 } 1621 1622 /* 1623 * Free intent log blocks up to this tx. 1624 */ 1625 zil_sync(os->os_zil, tx); 1626 os->os_phys->os_zil_header = os->os_zil_header; 1627 zio_nowait(soa->soa_zio); 1628 1629 mutex_destroy(&soa->soa_mutex); 1630 kmem_free(soa, sizeof (*soa)); 1631 } 1632 1633 /* called from dsl */ 1634 void 1635 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1636 { 1637 int txgoff; 1638 zbookmark_phys_t zb; 1639 zio_prop_t zp; 1640 zio_t *zio; 1641 int num_sublists; 1642 multilist_t *ml; 1643 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1644 *blkptr_copy = *os->os_rootbp; 1645 1646 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1647 1648 ASSERT(dmu_tx_is_syncing(tx)); 1649 /* XXX the write_done callback should really give us the tx... */ 1650 os->os_synctx = tx; 1651 1652 if (os->os_dsl_dataset == NULL) { 1653 /* 1654 * This is the MOS. If we have upgraded, 1655 * spa_max_replication() could change, so reset 1656 * os_copies here. 1657 */ 1658 os->os_copies = spa_max_replication(os->os_spa); 1659 } 1660 1661 /* 1662 * Create the root block IO 1663 */ 1664 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1665 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1666 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1667 arc_release(os->os_phys_buf, &os->os_phys_buf); 1668 1669 dmu_write_policy(os, NULL, 0, 0, &zp); 1670 1671 /* 1672 * If we are either claiming the ZIL or doing a raw receive, write 1673 * out the os_phys_buf raw. Neither of these actions will effect the 1674 * MAC at this point. 1675 */ 1676 if (os->os_raw_receive || 1677 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1678 ASSERT(os->os_encrypted); 1679 arc_convert_to_raw(os->os_phys_buf, 1680 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1681 DMU_OT_OBJSET, NULL, NULL, NULL); 1682 } 1683 1684 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1685 blkptr_copy, os->os_phys_buf, B_FALSE, dmu_os_is_l2cacheable(os), 1686 &zp, dmu_objset_write_ready, NULL, dmu_objset_write_done, 1687 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1688 1689 /* 1690 * Sync special dnodes - the parent IO for the sync is the root block 1691 */ 1692 DMU_META_DNODE(os)->dn_zio = zio; 1693 dnode_sync(DMU_META_DNODE(os), tx); 1694 1695 os->os_phys->os_flags = os->os_flags; 1696 1697 if (DMU_USERUSED_DNODE(os) && 1698 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1699 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1700 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1701 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1702 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1703 } 1704 1705 if (DMU_PROJECTUSED_DNODE(os) && 1706 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1707 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1708 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1709 } 1710 1711 txgoff = tx->tx_txg & TXG_MASK; 1712 1713 /* 1714 * We must create the list here because it uses the 1715 * dn_dirty_link[] of this txg. But it may already 1716 * exist because we call dsl_dataset_sync() twice per txg. 1717 */ 1718 if (os->os_synced_dnodes.ml_sublists == NULL) { 1719 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1720 offsetof(dnode_t, dn_dirty_link[txgoff]), 1721 dnode_multilist_index_func); 1722 } else { 1723 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1724 offsetof(dnode_t, dn_dirty_link[txgoff])); 1725 } 1726 1727 /* 1728 * zio_nowait(zio) is done after any/all sublist and meta dnode 1729 * zios have been nowaited, and the zil_sync() has been performed. 1730 * The soa is freed at the end of sync_meta_dnode_task. 1731 */ 1732 sync_objset_arg_t *soa = kmem_alloc(sizeof (*soa), KM_SLEEP); 1733 soa->soa_zio = zio; 1734 soa->soa_os = os; 1735 soa->soa_tx = tx; 1736 taskq_init_ent(&soa->soa_tq_ent); 1737 mutex_init(&soa->soa_mutex, NULL, MUTEX_DEFAULT, NULL); 1738 1739 ml = &os->os_dirty_dnodes[txgoff]; 1740 soa->soa_count = num_sublists = multilist_get_num_sublists(ml); 1741 1742 for (int i = 0; i < num_sublists; i++) { 1743 if (multilist_sublist_is_empty_idx(ml, i)) 1744 soa->soa_count--; 1745 } 1746 1747 if (soa->soa_count == 0) { 1748 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1749 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1750 } else { 1751 /* 1752 * Sync sublists in parallel. The last to finish 1753 * (i.e., when soa->soa_count reaches zero) must 1754 * dispatch sync_meta_dnode_task. 1755 */ 1756 for (int i = 0; i < num_sublists; i++) { 1757 if (multilist_sublist_is_empty_idx(ml, i)) 1758 continue; 1759 sync_dnodes_arg_t *sda = 1760 kmem_alloc(sizeof (*sda), KM_SLEEP); 1761 sda->sda_list = ml; 1762 sda->sda_sublist_idx = i; 1763 sda->sda_soa = soa; 1764 (void) taskq_dispatch( 1765 dmu_objset_pool(os)->dp_sync_taskq, 1766 sync_dnodes_task, sda, 0); 1767 /* sync_dnodes_task frees sda */ 1768 } 1769 } 1770 } 1771 1772 boolean_t 1773 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1774 { 1775 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1776 } 1777 1778 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1779 1780 void 1781 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1782 { 1783 file_cbs[ost] = cb; 1784 } 1785 1786 int 1787 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1788 zfs_file_info_t *zfi) 1789 { 1790 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1791 if (cb == NULL) 1792 return (EINVAL); 1793 return (cb(bonustype, data, zfi)); 1794 } 1795 1796 boolean_t 1797 dmu_objset_userused_enabled(objset_t *os) 1798 { 1799 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1800 file_cbs[os->os_phys->os_type] != NULL && 1801 DMU_USERUSED_DNODE(os) != NULL); 1802 } 1803 1804 boolean_t 1805 dmu_objset_userobjused_enabled(objset_t *os) 1806 { 1807 return (dmu_objset_userused_enabled(os) && 1808 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1809 } 1810 1811 boolean_t 1812 dmu_objset_projectquota_enabled(objset_t *os) 1813 { 1814 return (file_cbs[os->os_phys->os_type] != NULL && 1815 DMU_PROJECTUSED_DNODE(os) != NULL && 1816 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1817 } 1818 1819 typedef struct userquota_node { 1820 /* must be in the first filed, see userquota_update_cache() */ 1821 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1822 int64_t uqn_delta; 1823 avl_node_t uqn_node; 1824 } userquota_node_t; 1825 1826 typedef struct userquota_cache { 1827 avl_tree_t uqc_user_deltas; 1828 avl_tree_t uqc_group_deltas; 1829 avl_tree_t uqc_project_deltas; 1830 } userquota_cache_t; 1831 1832 static int 1833 userquota_compare(const void *l, const void *r) 1834 { 1835 const userquota_node_t *luqn = l; 1836 const userquota_node_t *ruqn = r; 1837 int rv; 1838 1839 /* 1840 * NB: can only access uqn_id because userquota_update_cache() doesn't 1841 * pass in an entire userquota_node_t. 1842 */ 1843 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1844 1845 return (TREE_ISIGN(rv)); 1846 } 1847 1848 static void 1849 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1850 { 1851 void *cookie; 1852 userquota_node_t *uqn; 1853 1854 ASSERT(dmu_tx_is_syncing(tx)); 1855 1856 cookie = NULL; 1857 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1858 &cookie)) != NULL) { 1859 /* 1860 * os_userused_lock protects against concurrent calls to 1861 * zap_increment_int(). It's needed because zap_increment_int() 1862 * is not thread-safe (i.e. not atomic). 1863 */ 1864 mutex_enter(&os->os_userused_lock); 1865 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1866 uqn->uqn_id, uqn->uqn_delta, tx)); 1867 mutex_exit(&os->os_userused_lock); 1868 kmem_free(uqn, sizeof (*uqn)); 1869 } 1870 avl_destroy(&cache->uqc_user_deltas); 1871 1872 cookie = NULL; 1873 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1874 &cookie)) != NULL) { 1875 mutex_enter(&os->os_userused_lock); 1876 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1877 uqn->uqn_id, uqn->uqn_delta, tx)); 1878 mutex_exit(&os->os_userused_lock); 1879 kmem_free(uqn, sizeof (*uqn)); 1880 } 1881 avl_destroy(&cache->uqc_group_deltas); 1882 1883 if (dmu_objset_projectquota_enabled(os)) { 1884 cookie = NULL; 1885 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1886 &cookie)) != NULL) { 1887 mutex_enter(&os->os_userused_lock); 1888 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1889 uqn->uqn_id, uqn->uqn_delta, tx)); 1890 mutex_exit(&os->os_userused_lock); 1891 kmem_free(uqn, sizeof (*uqn)); 1892 } 1893 avl_destroy(&cache->uqc_project_deltas); 1894 } 1895 } 1896 1897 static void 1898 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1899 { 1900 userquota_node_t *uqn; 1901 avl_index_t idx; 1902 1903 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1904 /* 1905 * Use id directly for searching because uqn_id is the first field of 1906 * userquota_node_t and fields after uqn_id won't be accessed in 1907 * avl_find(). 1908 */ 1909 uqn = avl_find(avl, (const void *)id, &idx); 1910 if (uqn == NULL) { 1911 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1912 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1913 avl_insert(avl, uqn, idx); 1914 } 1915 uqn->uqn_delta += delta; 1916 } 1917 1918 static void 1919 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1920 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1921 boolean_t subtract) 1922 { 1923 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1924 int64_t delta = DNODE_MIN_SIZE + used; 1925 char name[20]; 1926 1927 if (subtract) 1928 delta = -delta; 1929 1930 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1931 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1932 1933 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1934 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1935 1936 if (dmu_objset_projectquota_enabled(os)) { 1937 (void) snprintf(name, sizeof (name), "%llx", 1938 (longlong_t)project); 1939 userquota_update_cache(&cache->uqc_project_deltas, 1940 name, delta); 1941 } 1942 } 1943 } 1944 1945 static void 1946 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1947 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1948 { 1949 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1950 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1951 int delta = subtract ? -1 : 1; 1952 1953 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1954 (longlong_t)user); 1955 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1956 1957 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1958 (longlong_t)group); 1959 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1960 1961 if (dmu_objset_projectquota_enabled(os)) { 1962 (void) snprintf(name, sizeof (name), 1963 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1964 userquota_update_cache(&cache->uqc_project_deltas, 1965 name, delta); 1966 } 1967 } 1968 } 1969 1970 typedef struct userquota_updates_arg { 1971 objset_t *uua_os; 1972 int uua_sublist_idx; 1973 dmu_tx_t *uua_tx; 1974 } userquota_updates_arg_t; 1975 1976 static void 1977 userquota_updates_task(void *arg) 1978 { 1979 userquota_updates_arg_t *uua = arg; 1980 objset_t *os = uua->uua_os; 1981 dmu_tx_t *tx = uua->uua_tx; 1982 dnode_t *dn; 1983 userquota_cache_t cache = { { 0 } }; 1984 1985 multilist_sublist_t *list = multilist_sublist_lock_idx( 1986 &os->os_synced_dnodes, uua->uua_sublist_idx); 1987 1988 ASSERT(multilist_sublist_head(list) == NULL || 1989 dmu_objset_userused_enabled(os)); 1990 avl_create(&cache.uqc_user_deltas, userquota_compare, 1991 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1992 avl_create(&cache.uqc_group_deltas, userquota_compare, 1993 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1994 if (dmu_objset_projectquota_enabled(os)) 1995 avl_create(&cache.uqc_project_deltas, userquota_compare, 1996 sizeof (userquota_node_t), offsetof(userquota_node_t, 1997 uqn_node)); 1998 1999 while ((dn = multilist_sublist_head(list)) != NULL) { 2000 int flags; 2001 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2002 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2003 dn->dn_phys->dn_flags & 2004 DNODE_FLAG_USERUSED_ACCOUNTED); 2005 2006 flags = dn->dn_id_flags; 2007 ASSERT(flags); 2008 if (flags & DN_ID_OLD_EXIST) { 2009 do_userquota_update(os, &cache, dn->dn_oldused, 2010 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2011 dn->dn_oldprojid, B_TRUE); 2012 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2013 dn->dn_olduid, dn->dn_oldgid, 2014 dn->dn_oldprojid, B_TRUE); 2015 } 2016 if (flags & DN_ID_NEW_EXIST) { 2017 do_userquota_update(os, &cache, 2018 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2019 dn->dn_newuid, dn->dn_newgid, 2020 dn->dn_newprojid, B_FALSE); 2021 do_userobjquota_update(os, &cache, 2022 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2023 dn->dn_newprojid, B_FALSE); 2024 } 2025 2026 mutex_enter(&dn->dn_mtx); 2027 dn->dn_oldused = 0; 2028 dn->dn_oldflags = 0; 2029 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2030 dn->dn_olduid = dn->dn_newuid; 2031 dn->dn_oldgid = dn->dn_newgid; 2032 dn->dn_oldprojid = dn->dn_newprojid; 2033 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2034 if (dn->dn_bonuslen == 0) 2035 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2036 else 2037 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2038 } 2039 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2040 mutex_exit(&dn->dn_mtx); 2041 2042 multilist_sublist_remove(list, dn); 2043 dnode_rele(dn, &os->os_synced_dnodes); 2044 } 2045 do_userquota_cacheflush(os, &cache, tx); 2046 multilist_sublist_unlock(list); 2047 kmem_free(uua, sizeof (*uua)); 2048 } 2049 2050 /* 2051 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2052 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2053 * evicted because the block containing the dnode can't be evicted until it is 2054 * written out. However, this hold is necessary to prevent the dnode_t from 2055 * being moved (via dnode_move()) while it's still referenced by 2056 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2057 * dirty_lightweight_leaf-type dirty records. 2058 * 2059 * If we are doing user-object accounting, the dnode_rele() happens from 2060 * userquota_updates_task() instead. 2061 */ 2062 static void 2063 dnode_rele_task(void *arg) 2064 { 2065 userquota_updates_arg_t *uua = arg; 2066 objset_t *os = uua->uua_os; 2067 2068 multilist_sublist_t *list = multilist_sublist_lock_idx( 2069 &os->os_synced_dnodes, uua->uua_sublist_idx); 2070 2071 dnode_t *dn; 2072 while ((dn = multilist_sublist_head(list)) != NULL) { 2073 multilist_sublist_remove(list, dn); 2074 dnode_rele(dn, &os->os_synced_dnodes); 2075 } 2076 multilist_sublist_unlock(list); 2077 kmem_free(uua, sizeof (*uua)); 2078 } 2079 2080 /* 2081 * Return TRUE if userquota updates are needed. 2082 */ 2083 static boolean_t 2084 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2085 { 2086 if (!dmu_objset_userused_enabled(os)) 2087 return (B_FALSE); 2088 2089 /* 2090 * If this is a raw receive just return and handle accounting 2091 * later when we have the keys loaded. We also don't do user 2092 * accounting during claiming since the datasets are not owned 2093 * for the duration of claiming and this txg should only be 2094 * used for recovery. 2095 */ 2096 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2097 return (B_FALSE); 2098 2099 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2100 return (B_FALSE); 2101 2102 /* Allocate the user/group/project used objects if necessary. */ 2103 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2104 VERIFY0(zap_create_claim(os, 2105 DMU_USERUSED_OBJECT, 2106 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2107 VERIFY0(zap_create_claim(os, 2108 DMU_GROUPUSED_OBJECT, 2109 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2110 } 2111 2112 if (dmu_objset_projectquota_enabled(os) && 2113 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2114 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2115 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2116 } 2117 return (B_TRUE); 2118 } 2119 2120 /* 2121 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2122 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2123 * The caller must taskq_wait(dp_sync_taskq). 2124 */ 2125 void 2126 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2127 { 2128 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2129 2130 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2131 for (int i = 0; i < num_sublists; i++) { 2132 userquota_updates_arg_t *uua = 2133 kmem_alloc(sizeof (*uua), KM_SLEEP); 2134 uua->uua_os = os; 2135 uua->uua_sublist_idx = i; 2136 uua->uua_tx = tx; 2137 2138 /* 2139 * If we don't need to update userquotas, use 2140 * dnode_rele_task() to call dnode_rele() 2141 */ 2142 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2143 need_userquota ? userquota_updates_task : dnode_rele_task, 2144 uua, 0); 2145 /* callback frees uua */ 2146 } 2147 } 2148 2149 2150 /* 2151 * Returns a pointer to data to find uid/gid from 2152 * 2153 * If a dirty record for transaction group that is syncing can't 2154 * be found then NULL is returned. In the NULL case it is assumed 2155 * the uid/gid aren't changing. 2156 */ 2157 static void * 2158 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2159 { 2160 dbuf_dirty_record_t *dr; 2161 void *data; 2162 2163 if (db->db_dirtycnt == 0) { 2164 ASSERT(MUTEX_HELD(&db->db_mtx)); 2165 return (db->db.db_data); /* Nothing is changing */ 2166 } 2167 2168 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2169 2170 if (dr == NULL) { 2171 data = NULL; 2172 } else { 2173 if (dr->dr_dnode->dn_bonuslen == 0 && 2174 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2175 data = dr->dt.dl.dr_data->b_data; 2176 else 2177 data = dr->dt.dl.dr_data; 2178 } 2179 2180 return (data); 2181 } 2182 2183 void 2184 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2185 { 2186 objset_t *os = dn->dn_objset; 2187 void *data = NULL; 2188 dmu_buf_impl_t *db = NULL; 2189 int flags = dn->dn_id_flags; 2190 int error; 2191 boolean_t have_spill = B_FALSE; 2192 2193 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2194 return; 2195 2196 /* 2197 * Raw receives introduce a problem with user accounting. Raw 2198 * receives cannot update the user accounting info because the 2199 * user ids and the sizes are encrypted. To guarantee that we 2200 * never end up with bad user accounting, we simply disable it 2201 * during raw receives. We also disable this for normal receives 2202 * so that an incremental raw receive may be done on top of an 2203 * existing non-raw receive. 2204 */ 2205 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2206 return; 2207 2208 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2209 DN_ID_CHKED_SPILL))) 2210 return; 2211 2212 if (before && dn->dn_bonuslen != 0) 2213 data = DN_BONUS(dn->dn_phys); 2214 else if (!before && dn->dn_bonuslen != 0) { 2215 if (dn->dn_bonus) { 2216 db = dn->dn_bonus; 2217 mutex_enter(&db->db_mtx); 2218 data = dmu_objset_userquota_find_data(db, tx); 2219 } else { 2220 data = DN_BONUS(dn->dn_phys); 2221 } 2222 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2223 dmu_flags_t rf = DB_RF_MUST_SUCCEED; 2224 2225 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2226 rf |= DB_RF_HAVESTRUCT; 2227 error = dmu_spill_hold_by_dnode(dn, rf, 2228 FTAG, (dmu_buf_t **)&db); 2229 ASSERT(error == 0); 2230 mutex_enter(&db->db_mtx); 2231 data = (before) ? db->db.db_data : 2232 dmu_objset_userquota_find_data(db, tx); 2233 have_spill = B_TRUE; 2234 } else { 2235 mutex_enter(&dn->dn_mtx); 2236 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2237 mutex_exit(&dn->dn_mtx); 2238 return; 2239 } 2240 2241 /* 2242 * Must always call the callback in case the object 2243 * type has changed and that type isn't an object type to track 2244 */ 2245 zfs_file_info_t zfi; 2246 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2247 2248 if (before) { 2249 ASSERT(data); 2250 dn->dn_olduid = zfi.zfi_user; 2251 dn->dn_oldgid = zfi.zfi_group; 2252 dn->dn_oldprojid = zfi.zfi_project; 2253 } else if (data) { 2254 dn->dn_newuid = zfi.zfi_user; 2255 dn->dn_newgid = zfi.zfi_group; 2256 dn->dn_newprojid = zfi.zfi_project; 2257 } 2258 2259 /* 2260 * Preserve existing uid/gid when the callback can't determine 2261 * what the new uid/gid are and the callback returned EEXIST. 2262 * The EEXIST error tells us to just use the existing uid/gid. 2263 * If we don't know what the old values are then just assign 2264 * them to 0, since that is a new file being created. 2265 */ 2266 if (!before && data == NULL && error == EEXIST) { 2267 if (flags & DN_ID_OLD_EXIST) { 2268 dn->dn_newuid = dn->dn_olduid; 2269 dn->dn_newgid = dn->dn_oldgid; 2270 dn->dn_newprojid = dn->dn_oldprojid; 2271 } else { 2272 dn->dn_newuid = 0; 2273 dn->dn_newgid = 0; 2274 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2275 } 2276 error = 0; 2277 } 2278 2279 if (db) 2280 mutex_exit(&db->db_mtx); 2281 2282 mutex_enter(&dn->dn_mtx); 2283 if (error == 0 && before) 2284 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2285 if (error == 0 && !before) 2286 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2287 2288 if (have_spill) { 2289 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2290 } else { 2291 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2292 } 2293 mutex_exit(&dn->dn_mtx); 2294 if (have_spill) 2295 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2296 } 2297 2298 boolean_t 2299 dmu_objset_userspace_present(objset_t *os) 2300 { 2301 return (os->os_phys->os_flags & 2302 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2303 } 2304 2305 boolean_t 2306 dmu_objset_userobjspace_present(objset_t *os) 2307 { 2308 return (os->os_phys->os_flags & 2309 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2310 } 2311 2312 boolean_t 2313 dmu_objset_projectquota_present(objset_t *os) 2314 { 2315 return (os->os_phys->os_flags & 2316 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2317 } 2318 2319 static int 2320 dmu_objset_space_upgrade(objset_t *os) 2321 { 2322 uint64_t obj; 2323 int err = 0; 2324 2325 /* 2326 * We simply need to mark every object dirty, so that it will be 2327 * synced out and now accounted. If this is called 2328 * concurrently, or if we already did some work before crashing, 2329 * that's fine, since we track each object's accounted state 2330 * independently. 2331 */ 2332 2333 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2334 dmu_tx_t *tx; 2335 dmu_buf_t *db; 2336 int objerr; 2337 2338 mutex_enter(&os->os_upgrade_lock); 2339 if (os->os_upgrade_exit) 2340 err = SET_ERROR(EINTR); 2341 mutex_exit(&os->os_upgrade_lock); 2342 if (err != 0) 2343 return (err); 2344 2345 if (issig()) 2346 return (SET_ERROR(EINTR)); 2347 2348 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2349 if (objerr != 0) 2350 continue; 2351 tx = dmu_tx_create(os); 2352 dmu_tx_hold_bonus(tx, obj); 2353 objerr = dmu_tx_assign(tx, DMU_TX_WAIT); 2354 if (objerr != 0) { 2355 dmu_buf_rele(db, FTAG); 2356 dmu_tx_abort(tx); 2357 continue; 2358 } 2359 dmu_buf_will_dirty(db, tx); 2360 dmu_buf_rele(db, FTAG); 2361 dmu_tx_commit(tx); 2362 } 2363 return (0); 2364 } 2365 2366 static int 2367 dmu_objset_userspace_upgrade_cb(objset_t *os) 2368 { 2369 int err = 0; 2370 2371 if (dmu_objset_userspace_present(os)) 2372 return (0); 2373 if (dmu_objset_is_snapshot(os)) 2374 return (SET_ERROR(EINVAL)); 2375 if (!dmu_objset_userused_enabled(os)) 2376 return (SET_ERROR(ENOTSUP)); 2377 2378 err = dmu_objset_space_upgrade(os); 2379 if (err) 2380 return (err); 2381 2382 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2383 txg_wait_synced(dmu_objset_pool(os), 0); 2384 return (0); 2385 } 2386 2387 void 2388 dmu_objset_userspace_upgrade(objset_t *os) 2389 { 2390 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2391 } 2392 2393 static int 2394 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2395 { 2396 int err = 0; 2397 2398 if (dmu_objset_userobjspace_present(os) && 2399 dmu_objset_projectquota_present(os)) 2400 return (0); 2401 if (dmu_objset_is_snapshot(os)) 2402 return (SET_ERROR(EINVAL)); 2403 if (!dmu_objset_userused_enabled(os)) 2404 return (SET_ERROR(ENOTSUP)); 2405 if (!dmu_objset_projectquota_enabled(os) && 2406 dmu_objset_userobjspace_present(os)) 2407 return (SET_ERROR(ENOTSUP)); 2408 2409 if (dmu_objset_userobjused_enabled(os)) 2410 dmu_objset_ds(os)->ds_feature_activation[ 2411 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2412 if (dmu_objset_projectquota_enabled(os)) 2413 dmu_objset_ds(os)->ds_feature_activation[ 2414 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2415 2416 err = dmu_objset_space_upgrade(os); 2417 if (err) 2418 return (err); 2419 2420 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2421 if (dmu_objset_userobjused_enabled(os)) 2422 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2423 if (dmu_objset_projectquota_enabled(os)) 2424 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2425 2426 txg_wait_synced(dmu_objset_pool(os), 0); 2427 return (0); 2428 } 2429 2430 void 2431 dmu_objset_id_quota_upgrade(objset_t *os) 2432 { 2433 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2434 } 2435 2436 boolean_t 2437 dmu_objset_userobjspace_upgradable(objset_t *os) 2438 { 2439 return (dmu_objset_type(os) == DMU_OST_ZFS && 2440 !dmu_objset_is_snapshot(os) && 2441 dmu_objset_userobjused_enabled(os) && 2442 !dmu_objset_userobjspace_present(os) && 2443 spa_writeable(dmu_objset_spa(os))); 2444 } 2445 2446 boolean_t 2447 dmu_objset_projectquota_upgradable(objset_t *os) 2448 { 2449 return (dmu_objset_type(os) == DMU_OST_ZFS && 2450 !dmu_objset_is_snapshot(os) && 2451 dmu_objset_projectquota_enabled(os) && 2452 !dmu_objset_projectquota_present(os) && 2453 spa_writeable(dmu_objset_spa(os))); 2454 } 2455 2456 void 2457 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2458 uint64_t *usedobjsp, uint64_t *availobjsp) 2459 { 2460 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2461 usedobjsp, availobjsp); 2462 } 2463 2464 uint64_t 2465 dmu_objset_fsid_guid(objset_t *os) 2466 { 2467 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2468 } 2469 2470 void 2471 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2472 { 2473 stat->dds_type = os->os_phys->os_type; 2474 if (os->os_dsl_dataset) 2475 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2476 } 2477 2478 void 2479 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2480 { 2481 ASSERT(os->os_dsl_dataset || 2482 os->os_phys->os_type == DMU_OST_META); 2483 2484 if (os->os_dsl_dataset != NULL) 2485 dsl_dataset_stats(os->os_dsl_dataset, nv); 2486 2487 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2488 os->os_phys->os_type); 2489 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2490 dmu_objset_userspace_present(os)); 2491 } 2492 2493 int 2494 dmu_objset_is_snapshot(objset_t *os) 2495 { 2496 if (os->os_dsl_dataset != NULL) 2497 return (os->os_dsl_dataset->ds_is_snapshot); 2498 else 2499 return (B_FALSE); 2500 } 2501 2502 int 2503 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2504 boolean_t *conflict) 2505 { 2506 dsl_dataset_t *ds = os->os_dsl_dataset; 2507 uint64_t ignored; 2508 2509 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2510 return (SET_ERROR(ENOENT)); 2511 2512 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2513 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2514 MT_NORMALIZE, real, maxlen, conflict)); 2515 } 2516 2517 int 2518 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2519 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2520 { 2521 dsl_dataset_t *ds = os->os_dsl_dataset; 2522 zap_cursor_t cursor; 2523 zap_attribute_t *attr; 2524 2525 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2526 2527 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2528 return (SET_ERROR(ENOENT)); 2529 2530 attr = zap_attribute_alloc(); 2531 zap_cursor_init_serialized(&cursor, 2532 ds->ds_dir->dd_pool->dp_meta_objset, 2533 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2534 2535 if (zap_cursor_retrieve(&cursor, attr) != 0) { 2536 zap_cursor_fini(&cursor); 2537 zap_attribute_free(attr); 2538 return (SET_ERROR(ENOENT)); 2539 } 2540 2541 if (strlen(attr->za_name) + 1 > namelen) { 2542 zap_cursor_fini(&cursor); 2543 zap_attribute_free(attr); 2544 return (SET_ERROR(ENAMETOOLONG)); 2545 } 2546 2547 (void) strlcpy(name, attr->za_name, namelen); 2548 if (idp) 2549 *idp = attr->za_first_integer; 2550 if (case_conflict) 2551 *case_conflict = attr->za_normalization_conflict; 2552 zap_cursor_advance(&cursor); 2553 *offp = zap_cursor_serialize(&cursor); 2554 zap_cursor_fini(&cursor); 2555 zap_attribute_free(attr); 2556 2557 return (0); 2558 } 2559 2560 int 2561 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2562 { 2563 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2564 } 2565 2566 int 2567 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2568 uint64_t *idp, uint64_t *offp) 2569 { 2570 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2571 zap_cursor_t cursor; 2572 zap_attribute_t *attr; 2573 2574 /* there is no next dir on a snapshot! */ 2575 if (os->os_dsl_dataset->ds_object != 2576 dsl_dir_phys(dd)->dd_head_dataset_obj) 2577 return (SET_ERROR(ENOENT)); 2578 2579 attr = zap_attribute_alloc(); 2580 zap_cursor_init_serialized(&cursor, 2581 dd->dd_pool->dp_meta_objset, 2582 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2583 2584 if (zap_cursor_retrieve(&cursor, attr) != 0) { 2585 zap_cursor_fini(&cursor); 2586 zap_attribute_free(attr); 2587 return (SET_ERROR(ENOENT)); 2588 } 2589 2590 if (strlen(attr->za_name) + 1 > namelen) { 2591 zap_cursor_fini(&cursor); 2592 zap_attribute_free(attr); 2593 return (SET_ERROR(ENAMETOOLONG)); 2594 } 2595 2596 (void) strlcpy(name, attr->za_name, namelen); 2597 if (idp) 2598 *idp = attr->za_first_integer; 2599 zap_cursor_advance(&cursor); 2600 *offp = zap_cursor_serialize(&cursor); 2601 zap_cursor_fini(&cursor); 2602 zap_attribute_free(attr); 2603 2604 return (0); 2605 } 2606 2607 typedef struct dmu_objset_find_ctx { 2608 taskq_t *dc_tq; 2609 dsl_pool_t *dc_dp; 2610 uint64_t dc_ddobj; 2611 char *dc_ddname; /* last component of ddobj's name */ 2612 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2613 void *dc_arg; 2614 int dc_flags; 2615 kmutex_t *dc_error_lock; 2616 int *dc_error; 2617 } dmu_objset_find_ctx_t; 2618 2619 static void 2620 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2621 { 2622 dsl_pool_t *dp = dcp->dc_dp; 2623 dsl_dir_t *dd; 2624 dsl_dataset_t *ds; 2625 zap_cursor_t zc; 2626 zap_attribute_t *attr; 2627 uint64_t thisobj; 2628 int err = 0; 2629 2630 /* don't process if there already was an error */ 2631 if (*dcp->dc_error != 0) 2632 goto out; 2633 2634 /* 2635 * Note: passing the name (dc_ddname) here is optional, but it 2636 * improves performance because we don't need to call 2637 * zap_value_search() to determine the name. 2638 */ 2639 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2640 if (err != 0) 2641 goto out; 2642 2643 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2644 if (dd->dd_myname[0] == '$') { 2645 dsl_dir_rele(dd, FTAG); 2646 goto out; 2647 } 2648 2649 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2650 attr = zap_attribute_alloc(); 2651 2652 /* 2653 * Iterate over all children. 2654 */ 2655 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2656 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2657 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2658 zap_cursor_retrieve(&zc, attr) == 0; 2659 (void) zap_cursor_advance(&zc)) { 2660 ASSERT3U(attr->za_integer_length, ==, 2661 sizeof (uint64_t)); 2662 ASSERT3U(attr->za_num_integers, ==, 1); 2663 2664 dmu_objset_find_ctx_t *child_dcp = 2665 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2666 *child_dcp = *dcp; 2667 child_dcp->dc_ddobj = attr->za_first_integer; 2668 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2669 if (dcp->dc_tq != NULL) 2670 (void) taskq_dispatch(dcp->dc_tq, 2671 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2672 else 2673 dmu_objset_find_dp_impl(child_dcp); 2674 } 2675 zap_cursor_fini(&zc); 2676 } 2677 2678 /* 2679 * Iterate over all snapshots. 2680 */ 2681 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2682 dsl_dataset_t *ds; 2683 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2684 2685 if (err == 0) { 2686 uint64_t snapobj; 2687 2688 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2689 dsl_dataset_rele(ds, FTAG); 2690 2691 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2692 zap_cursor_retrieve(&zc, attr) == 0; 2693 (void) zap_cursor_advance(&zc)) { 2694 ASSERT3U(attr->za_integer_length, ==, 2695 sizeof (uint64_t)); 2696 ASSERT3U(attr->za_num_integers, ==, 1); 2697 2698 err = dsl_dataset_hold_obj(dp, 2699 attr->za_first_integer, FTAG, &ds); 2700 if (err != 0) 2701 break; 2702 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2703 dsl_dataset_rele(ds, FTAG); 2704 if (err != 0) 2705 break; 2706 } 2707 zap_cursor_fini(&zc); 2708 } 2709 } 2710 2711 zap_attribute_free(attr); 2712 2713 if (err != 0) { 2714 dsl_dir_rele(dd, FTAG); 2715 goto out; 2716 } 2717 2718 /* 2719 * Apply to self. 2720 */ 2721 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2722 2723 /* 2724 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2725 * that the dir will remain cached, and we won't have to re-instantiate 2726 * it (which could be expensive due to finding its name via 2727 * zap_value_search()). 2728 */ 2729 dsl_dir_rele(dd, FTAG); 2730 if (err != 0) 2731 goto out; 2732 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2733 dsl_dataset_rele(ds, FTAG); 2734 2735 out: 2736 if (err != 0) { 2737 mutex_enter(dcp->dc_error_lock); 2738 /* only keep first error */ 2739 if (*dcp->dc_error == 0) 2740 *dcp->dc_error = err; 2741 mutex_exit(dcp->dc_error_lock); 2742 } 2743 2744 if (dcp->dc_ddname != NULL) 2745 spa_strfree(dcp->dc_ddname); 2746 kmem_free(dcp, sizeof (*dcp)); 2747 } 2748 2749 static void 2750 dmu_objset_find_dp_cb(void *arg) 2751 { 2752 dmu_objset_find_ctx_t *dcp = arg; 2753 dsl_pool_t *dp = dcp->dc_dp; 2754 2755 /* 2756 * We need to get a pool_config_lock here, as there are several 2757 * assert(pool_config_held) down the stack. Getting a lock via 2758 * dsl_pool_config_enter is risky, as it might be stalled by a 2759 * pending writer. This would deadlock, as the write lock can 2760 * only be granted when our parent thread gives up the lock. 2761 * The _prio interface gives us priority over a pending writer. 2762 */ 2763 dsl_pool_config_enter_prio(dp, FTAG); 2764 2765 dmu_objset_find_dp_impl(dcp); 2766 2767 dsl_pool_config_exit(dp, FTAG); 2768 } 2769 2770 /* 2771 * Find objsets under and including ddobj, call func(ds) on each. 2772 * The order for the enumeration is completely undefined. 2773 * func is called with dsl_pool_config held. 2774 */ 2775 int 2776 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2777 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2778 { 2779 int error = 0; 2780 taskq_t *tq = NULL; 2781 int ntasks; 2782 dmu_objset_find_ctx_t *dcp; 2783 kmutex_t err_lock; 2784 2785 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2786 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2787 dcp->dc_tq = NULL; 2788 dcp->dc_dp = dp; 2789 dcp->dc_ddobj = ddobj; 2790 dcp->dc_ddname = NULL; 2791 dcp->dc_func = func; 2792 dcp->dc_arg = arg; 2793 dcp->dc_flags = flags; 2794 dcp->dc_error_lock = &err_lock; 2795 dcp->dc_error = &error; 2796 2797 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2798 /* 2799 * In case a write lock is held we can't make use of 2800 * parallelism, as down the stack of the worker threads 2801 * the lock is asserted via dsl_pool_config_held. 2802 * In case of a read lock this is solved by getting a read 2803 * lock in each worker thread, which isn't possible in case 2804 * of a writer lock. So we fall back to the synchronous path 2805 * here. 2806 * In the future it might be possible to get some magic into 2807 * dsl_pool_config_held in a way that it returns true for 2808 * the worker threads so that a single lock held from this 2809 * thread suffices. For now, stay single threaded. 2810 */ 2811 dmu_objset_find_dp_impl(dcp); 2812 mutex_destroy(&err_lock); 2813 2814 return (error); 2815 } 2816 2817 ntasks = dmu_find_threads; 2818 if (ntasks == 0) 2819 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2820 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2821 INT_MAX, 0); 2822 if (tq == NULL) { 2823 kmem_free(dcp, sizeof (*dcp)); 2824 mutex_destroy(&err_lock); 2825 2826 return (SET_ERROR(ENOMEM)); 2827 } 2828 dcp->dc_tq = tq; 2829 2830 /* dcp will be freed by task */ 2831 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2832 2833 /* 2834 * PORTING: this code relies on the property of taskq_wait to wait 2835 * until no more tasks are queued and no more tasks are active. As 2836 * we always queue new tasks from within other tasks, task_wait 2837 * reliably waits for the full recursion to finish, even though we 2838 * enqueue new tasks after taskq_wait has been called. 2839 * On platforms other than illumos, taskq_wait may not have this 2840 * property. 2841 */ 2842 taskq_wait(tq); 2843 taskq_destroy(tq); 2844 mutex_destroy(&err_lock); 2845 2846 return (error); 2847 } 2848 2849 /* 2850 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2851 * The dp_config_rwlock must not be held when this is called, and it 2852 * will not be held when the callback is called. 2853 * Therefore this function should only be used when the pool is not changing 2854 * (e.g. in syncing context), or the callback can deal with the possible races. 2855 */ 2856 static int 2857 dmu_objset_find_impl(spa_t *spa, const char *name, 2858 int func(const char *, void *), void *arg, int flags) 2859 { 2860 dsl_dir_t *dd; 2861 dsl_pool_t *dp = spa_get_dsl(spa); 2862 dsl_dataset_t *ds; 2863 zap_cursor_t zc; 2864 zap_attribute_t *attr; 2865 char *child; 2866 uint64_t thisobj; 2867 int err; 2868 2869 dsl_pool_config_enter(dp, FTAG); 2870 2871 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2872 if (err != 0) { 2873 dsl_pool_config_exit(dp, FTAG); 2874 return (err); 2875 } 2876 2877 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2878 if (dd->dd_myname[0] == '$') { 2879 dsl_dir_rele(dd, FTAG); 2880 dsl_pool_config_exit(dp, FTAG); 2881 return (0); 2882 } 2883 2884 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2885 attr = zap_attribute_alloc(); 2886 2887 /* 2888 * Iterate over all children. 2889 */ 2890 if (flags & DS_FIND_CHILDREN) { 2891 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2892 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2893 zap_cursor_retrieve(&zc, attr) == 0; 2894 (void) zap_cursor_advance(&zc)) { 2895 ASSERT3U(attr->za_integer_length, ==, 2896 sizeof (uint64_t)); 2897 ASSERT3U(attr->za_num_integers, ==, 1); 2898 2899 child = kmem_asprintf("%s/%s", name, attr->za_name); 2900 dsl_pool_config_exit(dp, FTAG); 2901 err = dmu_objset_find_impl(spa, child, 2902 func, arg, flags); 2903 dsl_pool_config_enter(dp, FTAG); 2904 kmem_strfree(child); 2905 if (err != 0) 2906 break; 2907 } 2908 zap_cursor_fini(&zc); 2909 2910 if (err != 0) { 2911 dsl_dir_rele(dd, FTAG); 2912 dsl_pool_config_exit(dp, FTAG); 2913 zap_attribute_free(attr); 2914 return (err); 2915 } 2916 } 2917 2918 /* 2919 * Iterate over all snapshots. 2920 */ 2921 if (flags & DS_FIND_SNAPSHOTS) { 2922 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2923 2924 if (err == 0) { 2925 uint64_t snapobj; 2926 2927 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2928 dsl_dataset_rele(ds, FTAG); 2929 2930 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2931 zap_cursor_retrieve(&zc, attr) == 0; 2932 (void) zap_cursor_advance(&zc)) { 2933 ASSERT3U(attr->za_integer_length, ==, 2934 sizeof (uint64_t)); 2935 ASSERT3U(attr->za_num_integers, ==, 1); 2936 2937 child = kmem_asprintf("%s@%s", 2938 name, attr->za_name); 2939 dsl_pool_config_exit(dp, FTAG); 2940 err = func(child, arg); 2941 dsl_pool_config_enter(dp, FTAG); 2942 kmem_strfree(child); 2943 if (err != 0) 2944 break; 2945 } 2946 zap_cursor_fini(&zc); 2947 } 2948 } 2949 2950 dsl_dir_rele(dd, FTAG); 2951 zap_attribute_free(attr); 2952 dsl_pool_config_exit(dp, FTAG); 2953 2954 if (err != 0) 2955 return (err); 2956 2957 /* Apply to self. */ 2958 return (func(name, arg)); 2959 } 2960 2961 /* 2962 * See comment above dmu_objset_find_impl(). 2963 */ 2964 int 2965 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2966 int flags) 2967 { 2968 spa_t *spa; 2969 int error; 2970 2971 error = spa_open(name, &spa, FTAG); 2972 if (error != 0) 2973 return (error); 2974 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2975 spa_close(spa, FTAG); 2976 return (error); 2977 } 2978 2979 boolean_t 2980 dmu_objset_incompatible_encryption_version(objset_t *os) 2981 { 2982 return (dsl_dir_incompatible_encryption_version( 2983 os->os_dsl_dataset->ds_dir)); 2984 } 2985 2986 void 2987 dmu_objset_set_user(objset_t *os, void *user_ptr) 2988 { 2989 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2990 os->os_user_ptr = user_ptr; 2991 } 2992 2993 void * 2994 dmu_objset_get_user(objset_t *os) 2995 { 2996 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2997 return (os->os_user_ptr); 2998 } 2999 3000 /* 3001 * Determine name of filesystem, given name of snapshot. 3002 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 3003 */ 3004 int 3005 dmu_fsname(const char *snapname, char *buf) 3006 { 3007 char *atp = strchr(snapname, '@'); 3008 if (atp == NULL) 3009 return (SET_ERROR(EINVAL)); 3010 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 3011 return (SET_ERROR(ENAMETOOLONG)); 3012 (void) strlcpy(buf, snapname, atp - snapname + 1); 3013 return (0); 3014 } 3015 3016 /* 3017 * Call when we think we're going to write/free space in open context 3018 * to track the amount of dirty data in the open txg, which is also the 3019 * amount of memory that can not be evicted until this txg syncs. 3020 * 3021 * Note that there are two conditions where this can be called from 3022 * syncing context: 3023 * 3024 * [1] When we just created the dataset, in which case we go on with 3025 * updating any accounting of dirty data as usual. 3026 * [2] When we are dirtying MOS data, in which case we only update the 3027 * pool's accounting of dirty data. 3028 */ 3029 void 3030 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3031 { 3032 dsl_dataset_t *ds = os->os_dsl_dataset; 3033 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3034 3035 if (ds != NULL) { 3036 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3037 } 3038 3039 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3040 } 3041 3042 #if defined(_KERNEL) 3043 EXPORT_SYMBOL(dmu_objset_zil); 3044 EXPORT_SYMBOL(dmu_objset_pool); 3045 EXPORT_SYMBOL(dmu_objset_ds); 3046 EXPORT_SYMBOL(dmu_objset_type); 3047 EXPORT_SYMBOL(dmu_objset_name); 3048 EXPORT_SYMBOL(dmu_objset_hold); 3049 EXPORT_SYMBOL(dmu_objset_hold_flags); 3050 EXPORT_SYMBOL(dmu_objset_own); 3051 EXPORT_SYMBOL(dmu_objset_rele); 3052 EXPORT_SYMBOL(dmu_objset_rele_flags); 3053 EXPORT_SYMBOL(dmu_objset_disown); 3054 EXPORT_SYMBOL(dmu_objset_from_ds); 3055 EXPORT_SYMBOL(dmu_objset_create); 3056 EXPORT_SYMBOL(dmu_objset_stats); 3057 EXPORT_SYMBOL(dmu_objset_fast_stat); 3058 EXPORT_SYMBOL(dmu_objset_spa); 3059 EXPORT_SYMBOL(dmu_objset_space); 3060 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3061 EXPORT_SYMBOL(dmu_objset_find); 3062 EXPORT_SYMBOL(dmu_objset_byteswap); 3063 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3064 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3065 EXPORT_SYMBOL(dmu_objset_dnodesize); 3066 3067 EXPORT_SYMBOL(dmu_objset_sync); 3068 EXPORT_SYMBOL(dmu_objset_is_dirty); 3069 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3070 EXPORT_SYMBOL(dmu_objset_create_impl); 3071 EXPORT_SYMBOL(dmu_objset_open_impl); 3072 EXPORT_SYMBOL(dmu_objset_evict); 3073 EXPORT_SYMBOL(dmu_objset_register_type); 3074 EXPORT_SYMBOL(dmu_objset_sync_done); 3075 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3076 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3077 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3078 EXPORT_SYMBOL(dmu_objset_userspace_present); 3079 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3080 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3081 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3082 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3083 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3084 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3085 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3086 #endif 3087