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 https://opensource.org/licenses/CDDL-1.0. 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 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2012, 2020 by Delphix. All rights reserved. 25 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 26 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 27 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 28 * Copyright (c) 2015, STRATO AG, Inc. All rights reserved. 29 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 30 * Copyright 2017 Nexenta Systems, Inc. 31 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved. 32 * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. 33 * Copyright (c) 2019, Klara Inc. 34 * Copyright (c) 2019, Allan Jude 35 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP. 36 */ 37 38 /* Portions Copyright 2010 Robert Milkowski */ 39 40 #include <sys/cred.h> 41 #include <sys/zfs_context.h> 42 #include <sys/dmu_objset.h> 43 #include <sys/dsl_dir.h> 44 #include <sys/dsl_dataset.h> 45 #include <sys/dsl_prop.h> 46 #include <sys/dsl_pool.h> 47 #include <sys/dsl_synctask.h> 48 #include <sys/dsl_deleg.h> 49 #include <sys/dnode.h> 50 #include <sys/dbuf.h> 51 #include <sys/zvol.h> 52 #include <sys/dmu_tx.h> 53 #include <sys/zap.h> 54 #include <sys/zil.h> 55 #include <sys/dmu_impl.h> 56 #include <sys/zfs_ioctl.h> 57 #include <sys/sa.h> 58 #include <sys/zfs_onexit.h> 59 #include <sys/dsl_destroy.h> 60 #include <sys/vdev.h> 61 #include <sys/zfeature.h> 62 #include <sys/policy.h> 63 #include <sys/spa_impl.h> 64 #include <sys/dmu_recv.h> 65 #include <sys/zfs_project.h> 66 #include "zfs_namecheck.h" 67 #include <sys/vdev_impl.h> 68 #include <sys/arc.h> 69 70 /* 71 * Needed to close a window in dnode_move() that allows the objset to be freed 72 * before it can be safely accessed. 73 */ 74 krwlock_t os_lock; 75 76 /* 77 * Tunable to overwrite the maximum number of threads for the parallelization 78 * of dmu_objset_find_dp, needed to speed up the import of pools with many 79 * datasets. 80 * Default is 4 times the number of leaf vdevs. 81 */ 82 static const int dmu_find_threads = 0; 83 84 /* 85 * Backfill lower metadnode objects after this many have been freed. 86 * Backfilling negatively impacts object creation rates, so only do it 87 * if there are enough holes to fill. 88 */ 89 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 90 91 static const char *upgrade_tag = "upgrade_tag"; 92 93 static void dmu_objset_find_dp_cb(void *arg); 94 95 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 96 static void dmu_objset_upgrade_stop(objset_t *os); 97 98 void 99 dmu_objset_init(void) 100 { 101 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 102 } 103 104 void 105 dmu_objset_fini(void) 106 { 107 rw_destroy(&os_lock); 108 } 109 110 spa_t * 111 dmu_objset_spa(objset_t *os) 112 { 113 return (os->os_spa); 114 } 115 116 zilog_t * 117 dmu_objset_zil(objset_t *os) 118 { 119 return (os->os_zil); 120 } 121 122 dsl_pool_t * 123 dmu_objset_pool(objset_t *os) 124 { 125 dsl_dataset_t *ds; 126 127 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 128 return (ds->ds_dir->dd_pool); 129 else 130 return (spa_get_dsl(os->os_spa)); 131 } 132 133 dsl_dataset_t * 134 dmu_objset_ds(objset_t *os) 135 { 136 return (os->os_dsl_dataset); 137 } 138 139 dmu_objset_type_t 140 dmu_objset_type(objset_t *os) 141 { 142 return (os->os_phys->os_type); 143 } 144 145 void 146 dmu_objset_name(objset_t *os, char *buf) 147 { 148 dsl_dataset_name(os->os_dsl_dataset, buf); 149 } 150 151 uint64_t 152 dmu_objset_id(objset_t *os) 153 { 154 dsl_dataset_t *ds = os->os_dsl_dataset; 155 156 return (ds ? ds->ds_object : 0); 157 } 158 159 uint64_t 160 dmu_objset_dnodesize(objset_t *os) 161 { 162 return (os->os_dnodesize); 163 } 164 165 zfs_sync_type_t 166 dmu_objset_syncprop(objset_t *os) 167 { 168 return (os->os_sync); 169 } 170 171 zfs_logbias_op_t 172 dmu_objset_logbias(objset_t *os) 173 { 174 return (os->os_logbias); 175 } 176 177 static void 178 checksum_changed_cb(void *arg, uint64_t newval) 179 { 180 objset_t *os = arg; 181 182 /* 183 * Inheritance should have been done by now. 184 */ 185 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 186 187 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 188 } 189 190 static void 191 compression_changed_cb(void *arg, uint64_t newval) 192 { 193 objset_t *os = arg; 194 195 /* 196 * Inheritance and range checking should have been done by now. 197 */ 198 ASSERT(newval != ZIO_COMPRESS_INHERIT); 199 200 os->os_compress = zio_compress_select(os->os_spa, 201 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 202 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 203 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 204 } 205 206 static void 207 copies_changed_cb(void *arg, uint64_t newval) 208 { 209 objset_t *os = arg; 210 211 /* 212 * Inheritance and range checking should have been done by now. 213 */ 214 ASSERT(newval > 0); 215 ASSERT(newval <= spa_max_replication(os->os_spa)); 216 217 os->os_copies = newval; 218 } 219 220 static void 221 dedup_changed_cb(void *arg, uint64_t newval) 222 { 223 objset_t *os = arg; 224 spa_t *spa = os->os_spa; 225 enum zio_checksum checksum; 226 227 /* 228 * Inheritance should have been done by now. 229 */ 230 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 231 232 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 233 234 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 235 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 236 } 237 238 static void 239 primary_cache_changed_cb(void *arg, uint64_t newval) 240 { 241 objset_t *os = arg; 242 243 /* 244 * Inheritance and range checking should have been done by now. 245 */ 246 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 247 newval == ZFS_CACHE_METADATA); 248 249 os->os_primary_cache = newval; 250 } 251 252 static void 253 secondary_cache_changed_cb(void *arg, uint64_t newval) 254 { 255 objset_t *os = arg; 256 257 /* 258 * Inheritance and range checking should have been done by now. 259 */ 260 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 261 newval == ZFS_CACHE_METADATA); 262 263 os->os_secondary_cache = newval; 264 } 265 266 static void 267 sync_changed_cb(void *arg, uint64_t newval) 268 { 269 objset_t *os = arg; 270 271 /* 272 * Inheritance and range checking should have been done by now. 273 */ 274 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 275 newval == ZFS_SYNC_DISABLED); 276 277 os->os_sync = newval; 278 if (os->os_zil) 279 zil_set_sync(os->os_zil, newval); 280 } 281 282 static void 283 redundant_metadata_changed_cb(void *arg, uint64_t newval) 284 { 285 objset_t *os = arg; 286 287 /* 288 * Inheritance and range checking should have been done by now. 289 */ 290 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 291 newval == ZFS_REDUNDANT_METADATA_MOST || 292 newval == ZFS_REDUNDANT_METADATA_SOME || 293 newval == ZFS_REDUNDANT_METADATA_NONE); 294 295 os->os_redundant_metadata = newval; 296 } 297 298 static void 299 dnodesize_changed_cb(void *arg, uint64_t newval) 300 { 301 objset_t *os = arg; 302 303 switch (newval) { 304 case ZFS_DNSIZE_LEGACY: 305 os->os_dnodesize = DNODE_MIN_SIZE; 306 break; 307 case ZFS_DNSIZE_AUTO: 308 /* 309 * Choose a dnode size that will work well for most 310 * workloads if the user specified "auto". Future code 311 * improvements could dynamically select a dnode size 312 * based on observed workload patterns. 313 */ 314 os->os_dnodesize = DNODE_MIN_SIZE * 2; 315 break; 316 case ZFS_DNSIZE_1K: 317 case ZFS_DNSIZE_2K: 318 case ZFS_DNSIZE_4K: 319 case ZFS_DNSIZE_8K: 320 case ZFS_DNSIZE_16K: 321 os->os_dnodesize = newval; 322 break; 323 } 324 } 325 326 static void 327 smallblk_changed_cb(void *arg, uint64_t newval) 328 { 329 objset_t *os = arg; 330 331 /* 332 * Inheritance and range checking should have been done by now. 333 */ 334 ASSERT(newval <= SPA_MAXBLOCKSIZE); 335 ASSERT(ISP2(newval)); 336 337 os->os_zpl_special_smallblock = newval; 338 } 339 340 static void 341 logbias_changed_cb(void *arg, uint64_t newval) 342 { 343 objset_t *os = arg; 344 345 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 346 newval == ZFS_LOGBIAS_THROUGHPUT); 347 os->os_logbias = newval; 348 if (os->os_zil) 349 zil_set_logbias(os->os_zil, newval); 350 } 351 352 static void 353 recordsize_changed_cb(void *arg, uint64_t newval) 354 { 355 objset_t *os = arg; 356 357 os->os_recordsize = newval; 358 } 359 360 void 361 dmu_objset_byteswap(void *buf, size_t size) 362 { 363 objset_phys_t *osp = buf; 364 365 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 366 size == sizeof (objset_phys_t)); 367 dnode_byteswap(&osp->os_meta_dnode); 368 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 369 osp->os_type = BSWAP_64(osp->os_type); 370 osp->os_flags = BSWAP_64(osp->os_flags); 371 if (size >= OBJSET_PHYS_SIZE_V2) { 372 dnode_byteswap(&osp->os_userused_dnode); 373 dnode_byteswap(&osp->os_groupused_dnode); 374 if (size >= sizeof (objset_phys_t)) 375 dnode_byteswap(&osp->os_projectused_dnode); 376 } 377 } 378 379 /* 380 * The hash is a CRC-based hash of the objset_t pointer and the object number. 381 */ 382 static uint64_t 383 dnode_hash(const objset_t *os, uint64_t obj) 384 { 385 uintptr_t osv = (uintptr_t)os; 386 uint64_t crc = -1ULL; 387 388 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 389 /* 390 * The low 6 bits of the pointer don't have much entropy, because 391 * the objset_t is larger than 2^6 bytes long. 392 */ 393 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF]; 394 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF]; 395 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF]; 396 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF]; 397 398 crc ^= (osv>>14) ^ (obj>>24); 399 400 return (crc); 401 } 402 403 static unsigned int 404 dnode_multilist_index_func(multilist_t *ml, void *obj) 405 { 406 dnode_t *dn = obj; 407 408 /* 409 * The low order bits of the hash value are thought to be 410 * distributed evenly. Otherwise, in the case that the multilist 411 * has a power of two number of sublists, each sublists' usage 412 * would not be evenly distributed. In this context full 64bit 413 * division would be a waste of time, so limit it to 32 bits. 414 */ 415 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 416 multilist_get_num_sublists(ml)); 417 } 418 419 static inline boolean_t 420 dmu_os_is_l2cacheable(objset_t *os) 421 { 422 vdev_t *vd = NULL; 423 zfs_cache_type_t cache = os->os_secondary_cache; 424 blkptr_t *bp = os->os_rootbp; 425 426 if (bp != NULL && !BP_IS_HOLE(bp)) { 427 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva); 428 vdev_t *rvd = os->os_spa->spa_root_vdev; 429 430 if (vdev < rvd->vdev_children) 431 vd = rvd->vdev_child[vdev]; 432 433 if (cache == ZFS_CACHE_ALL || cache == ZFS_CACHE_METADATA) { 434 if (vd == NULL) 435 return (B_TRUE); 436 437 if ((vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL && 438 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) || 439 l2arc_exclude_special == 0) 440 return (B_TRUE); 441 } 442 } 443 444 return (B_FALSE); 445 } 446 447 /* 448 * Instantiates the objset_t in-memory structure corresponding to the 449 * objset_phys_t that's pointed to by the specified blkptr_t. 450 */ 451 int 452 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 453 objset_t **osp) 454 { 455 objset_t *os; 456 int i, err; 457 458 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 459 ASSERT(!BP_IS_REDACTED(bp)); 460 461 /* 462 * We need the pool config lock to get properties. 463 */ 464 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 465 466 /* 467 * The $ORIGIN dataset (if it exists) doesn't have an associated 468 * objset, so there's no reason to open it. The $ORIGIN dataset 469 * will not exist on pools older than SPA_VERSION_ORIGIN. 470 */ 471 if (ds != NULL && spa_get_dsl(spa) != NULL && 472 spa_get_dsl(spa)->dp_origin_snap != NULL) { 473 ASSERT3P(ds->ds_dir, !=, 474 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 475 } 476 477 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 478 os->os_dsl_dataset = ds; 479 os->os_spa = spa; 480 os->os_rootbp = bp; 481 if (!BP_IS_HOLE(os->os_rootbp)) { 482 arc_flags_t aflags = ARC_FLAG_WAIT; 483 zbookmark_phys_t zb; 484 int size; 485 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL; 486 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 487 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 488 489 if (dmu_os_is_l2cacheable(os)) 490 aflags |= ARC_FLAG_L2CACHE; 491 492 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 493 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 494 ASSERT(BP_IS_AUTHENTICATED(bp)); 495 zio_flags |= ZIO_FLAG_RAW; 496 } 497 498 dprintf_bp(os->os_rootbp, "reading %s", ""); 499 err = arc_read(NULL, spa, os->os_rootbp, 500 arc_getbuf_func, &os->os_phys_buf, 501 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 502 if (err != 0) { 503 kmem_free(os, sizeof (objset_t)); 504 /* convert checksum errors into IO errors */ 505 if (err == ECKSUM) 506 err = SET_ERROR(EIO); 507 return (err); 508 } 509 510 if (spa_version(spa) < SPA_VERSION_USERSPACE) 511 size = OBJSET_PHYS_SIZE_V1; 512 else if (!spa_feature_is_enabled(spa, 513 SPA_FEATURE_PROJECT_QUOTA)) 514 size = OBJSET_PHYS_SIZE_V2; 515 else 516 size = sizeof (objset_phys_t); 517 518 /* Increase the blocksize if we are permitted. */ 519 if (arc_buf_size(os->os_phys_buf) < size) { 520 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 521 ARC_BUFC_METADATA, size); 522 memset(buf->b_data, 0, size); 523 memcpy(buf->b_data, os->os_phys_buf->b_data, 524 arc_buf_size(os->os_phys_buf)); 525 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 526 os->os_phys_buf = buf; 527 } 528 529 os->os_phys = os->os_phys_buf->b_data; 530 os->os_flags = os->os_phys->os_flags; 531 } else { 532 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 533 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 534 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 535 ARC_BUFC_METADATA, size); 536 os->os_phys = os->os_phys_buf->b_data; 537 memset(os->os_phys, 0, size); 538 } 539 /* 540 * These properties will be filled in by the logic in zfs_get_zplprop() 541 * when they are queried for the first time. 542 */ 543 os->os_version = OBJSET_PROP_UNINITIALIZED; 544 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 545 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 546 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 547 548 /* 549 * Note: the changed_cb will be called once before the register 550 * func returns, thus changing the checksum/compression from the 551 * default (fletcher2/off). Snapshots don't need to know about 552 * checksum/compression/copies. 553 */ 554 if (ds != NULL) { 555 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 556 557 err = dsl_prop_register(ds, 558 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 559 primary_cache_changed_cb, os); 560 if (err == 0) { 561 err = dsl_prop_register(ds, 562 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 563 secondary_cache_changed_cb, os); 564 } 565 if (!ds->ds_is_snapshot) { 566 if (err == 0) { 567 err = dsl_prop_register(ds, 568 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 569 checksum_changed_cb, os); 570 } 571 if (err == 0) { 572 err = dsl_prop_register(ds, 573 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 574 compression_changed_cb, os); 575 } 576 if (err == 0) { 577 err = dsl_prop_register(ds, 578 zfs_prop_to_name(ZFS_PROP_COPIES), 579 copies_changed_cb, os); 580 } 581 if (err == 0) { 582 err = dsl_prop_register(ds, 583 zfs_prop_to_name(ZFS_PROP_DEDUP), 584 dedup_changed_cb, os); 585 } 586 if (err == 0) { 587 err = dsl_prop_register(ds, 588 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 589 logbias_changed_cb, os); 590 } 591 if (err == 0) { 592 err = dsl_prop_register(ds, 593 zfs_prop_to_name(ZFS_PROP_SYNC), 594 sync_changed_cb, os); 595 } 596 if (err == 0) { 597 err = dsl_prop_register(ds, 598 zfs_prop_to_name( 599 ZFS_PROP_REDUNDANT_METADATA), 600 redundant_metadata_changed_cb, os); 601 } 602 if (err == 0) { 603 err = dsl_prop_register(ds, 604 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 605 recordsize_changed_cb, os); 606 } 607 if (err == 0) { 608 err = dsl_prop_register(ds, 609 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 610 dnodesize_changed_cb, os); 611 } 612 if (err == 0) { 613 err = dsl_prop_register(ds, 614 zfs_prop_to_name( 615 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 616 smallblk_changed_cb, os); 617 } 618 } 619 if (err != 0) { 620 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 621 kmem_free(os, sizeof (objset_t)); 622 return (err); 623 } 624 } else { 625 /* It's the meta-objset. */ 626 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 627 os->os_compress = ZIO_COMPRESS_ON; 628 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 629 os->os_encrypted = B_FALSE; 630 os->os_copies = spa_max_replication(spa); 631 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 632 os->os_dedup_verify = B_FALSE; 633 os->os_logbias = ZFS_LOGBIAS_LATENCY; 634 os->os_sync = ZFS_SYNC_STANDARD; 635 os->os_primary_cache = ZFS_CACHE_ALL; 636 os->os_secondary_cache = ZFS_CACHE_ALL; 637 os->os_dnodesize = DNODE_MIN_SIZE; 638 } 639 640 if (ds == NULL || !ds->ds_is_snapshot) 641 os->os_zil_header = os->os_phys->os_zil_header; 642 os->os_zil = zil_alloc(os, &os->os_zil_header); 643 644 for (i = 0; i < TXG_SIZE; i++) { 645 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 646 offsetof(dnode_t, dn_dirty_link[i]), 647 dnode_multilist_index_func); 648 } 649 list_create(&os->os_dnodes, sizeof (dnode_t), 650 offsetof(dnode_t, dn_link)); 651 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 652 offsetof(dmu_buf_impl_t, db_link)); 653 654 list_link_init(&os->os_evicting_node); 655 656 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 657 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 658 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 659 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 660 os->os_obj_next_percpu_len = boot_ncpus; 661 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 662 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 663 664 dnode_special_open(os, &os->os_phys->os_meta_dnode, 665 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 666 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 667 dnode_special_open(os, &os->os_phys->os_userused_dnode, 668 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 669 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 670 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 671 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 672 dnode_special_open(os, 673 &os->os_phys->os_projectused_dnode, 674 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 675 } 676 677 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 678 679 *osp = os; 680 return (0); 681 } 682 683 int 684 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 685 { 686 int err = 0; 687 688 /* 689 * We need the pool_config lock to manipulate the dsl_dataset_t. 690 * Even if the dataset is long-held, we need the pool_config lock 691 * to open the objset, as it needs to get properties. 692 */ 693 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 694 695 mutex_enter(&ds->ds_opening_lock); 696 if (ds->ds_objset == NULL) { 697 objset_t *os; 698 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 699 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 700 ds, dsl_dataset_get_blkptr(ds), &os); 701 rrw_exit(&ds->ds_bp_rwlock, FTAG); 702 703 if (err == 0) { 704 mutex_enter(&ds->ds_lock); 705 ASSERT(ds->ds_objset == NULL); 706 ds->ds_objset = os; 707 mutex_exit(&ds->ds_lock); 708 } 709 } 710 *osp = ds->ds_objset; 711 mutex_exit(&ds->ds_opening_lock); 712 return (err); 713 } 714 715 /* 716 * Holds the pool while the objset is held. Therefore only one objset 717 * can be held at a time. 718 */ 719 int 720 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag, 721 objset_t **osp) 722 { 723 dsl_pool_t *dp; 724 dsl_dataset_t *ds; 725 int err; 726 ds_hold_flags_t flags; 727 728 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 729 err = dsl_pool_hold(name, tag, &dp); 730 if (err != 0) 731 return (err); 732 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 733 if (err != 0) { 734 dsl_pool_rele(dp, tag); 735 return (err); 736 } 737 738 err = dmu_objset_from_ds(ds, osp); 739 if (err != 0) { 740 dsl_dataset_rele(ds, tag); 741 dsl_pool_rele(dp, tag); 742 } 743 744 return (err); 745 } 746 747 int 748 dmu_objset_hold(const char *name, const void *tag, objset_t **osp) 749 { 750 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 751 } 752 753 static int 754 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 755 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 756 { 757 (void) tag; 758 759 int err = dmu_objset_from_ds(ds, osp); 760 if (err != 0) { 761 return (err); 762 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 763 return (SET_ERROR(EINVAL)); 764 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 765 return (SET_ERROR(EROFS)); 766 } else if (!readonly && decrypt && 767 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 768 return (SET_ERROR(EROFS)); 769 } 770 771 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 772 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 773 zbookmark_phys_t zb; 774 775 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 776 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 777 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 778 &zb, B_FALSE); 779 if (err != 0) 780 return (err); 781 782 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 783 } 784 785 return (0); 786 } 787 788 /* 789 * dsl_pool must not be held when this is called. 790 * Upon successful return, there will be a longhold on the dataset, 791 * and the dsl_pool will not be held. 792 */ 793 int 794 dmu_objset_own(const char *name, dmu_objset_type_t type, 795 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 796 { 797 dsl_pool_t *dp; 798 dsl_dataset_t *ds; 799 int err; 800 ds_hold_flags_t flags; 801 802 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 803 err = dsl_pool_hold(name, FTAG, &dp); 804 if (err != 0) 805 return (err); 806 err = dsl_dataset_own(dp, name, flags, tag, &ds); 807 if (err != 0) { 808 dsl_pool_rele(dp, FTAG); 809 return (err); 810 } 811 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 812 if (err != 0) { 813 dsl_dataset_disown(ds, flags, tag); 814 dsl_pool_rele(dp, FTAG); 815 return (err); 816 } 817 818 /* 819 * User accounting requires the dataset to be decrypted and rw. 820 * We also don't begin user accounting during claiming to help 821 * speed up pool import times and to keep this txg reserved 822 * completely for recovery work. 823 */ 824 if (!readonly && !dp->dp_spa->spa_claiming && 825 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 826 if (dmu_objset_userobjspace_upgradable(*osp) || 827 dmu_objset_projectquota_upgradable(*osp)) { 828 dmu_objset_id_quota_upgrade(*osp); 829 } else if (dmu_objset_userused_enabled(*osp)) { 830 dmu_objset_userspace_upgrade(*osp); 831 } 832 } 833 834 dsl_pool_rele(dp, FTAG); 835 return (0); 836 } 837 838 int 839 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 840 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 841 { 842 dsl_dataset_t *ds; 843 int err; 844 ds_hold_flags_t flags; 845 846 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 847 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 848 if (err != 0) 849 return (err); 850 851 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 852 if (err != 0) { 853 dsl_dataset_disown(ds, flags, tag); 854 return (err); 855 } 856 857 return (0); 858 } 859 860 void 861 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag) 862 { 863 ds_hold_flags_t flags; 864 dsl_pool_t *dp = dmu_objset_pool(os); 865 866 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 867 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 868 dsl_pool_rele(dp, tag); 869 } 870 871 void 872 dmu_objset_rele(objset_t *os, const void *tag) 873 { 874 dmu_objset_rele_flags(os, B_FALSE, tag); 875 } 876 877 /* 878 * When we are called, os MUST refer to an objset associated with a dataset 879 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 880 * == tag. We will then release and reacquire ownership of the dataset while 881 * holding the pool config_rwlock to avoid intervening namespace or ownership 882 * changes may occur. 883 * 884 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 885 * release the hold on its dataset and acquire a new one on the dataset of the 886 * same name so that it can be partially torn down and reconstructed. 887 */ 888 void 889 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 890 boolean_t decrypt, const void *tag) 891 { 892 dsl_pool_t *dp; 893 char name[ZFS_MAX_DATASET_NAME_LEN]; 894 ds_hold_flags_t flags; 895 896 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 897 VERIFY3P(ds, !=, NULL); 898 VERIFY3P(ds->ds_owner, ==, tag); 899 VERIFY(dsl_dataset_long_held(ds)); 900 901 dsl_dataset_name(ds, name); 902 dp = ds->ds_dir->dd_pool; 903 dsl_pool_config_enter(dp, FTAG); 904 dsl_dataset_disown(ds, flags, tag); 905 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 906 dsl_pool_config_exit(dp, FTAG); 907 } 908 909 void 910 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag) 911 { 912 ds_hold_flags_t flags; 913 914 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 915 /* 916 * Stop upgrading thread 917 */ 918 dmu_objset_upgrade_stop(os); 919 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 920 } 921 922 void 923 dmu_objset_evict_dbufs(objset_t *os) 924 { 925 dnode_t *dn_marker; 926 dnode_t *dn; 927 928 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 929 930 mutex_enter(&os->os_lock); 931 dn = list_head(&os->os_dnodes); 932 while (dn != NULL) { 933 /* 934 * Skip dnodes without holds. We have to do this dance 935 * because dnode_add_ref() only works if there is already a 936 * hold. If the dnode has no holds, then it has no dbufs. 937 */ 938 if (dnode_add_ref(dn, FTAG)) { 939 list_insert_after(&os->os_dnodes, dn, dn_marker); 940 mutex_exit(&os->os_lock); 941 942 dnode_evict_dbufs(dn); 943 dnode_rele(dn, FTAG); 944 945 mutex_enter(&os->os_lock); 946 dn = list_next(&os->os_dnodes, dn_marker); 947 list_remove(&os->os_dnodes, dn_marker); 948 } else { 949 dn = list_next(&os->os_dnodes, dn); 950 } 951 } 952 mutex_exit(&os->os_lock); 953 954 kmem_free(dn_marker, sizeof (dnode_t)); 955 956 if (DMU_USERUSED_DNODE(os) != NULL) { 957 if (DMU_PROJECTUSED_DNODE(os) != NULL) 958 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 959 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 960 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 961 } 962 dnode_evict_dbufs(DMU_META_DNODE(os)); 963 } 964 965 /* 966 * Objset eviction processing is split into into two pieces. 967 * The first marks the objset as evicting, evicts any dbufs that 968 * have a refcount of zero, and then queues up the objset for the 969 * second phase of eviction. Once os->os_dnodes has been cleared by 970 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 971 * The second phase closes the special dnodes, dequeues the objset from 972 * the list of those undergoing eviction, and finally frees the objset. 973 * 974 * NOTE: Due to asynchronous eviction processing (invocation of 975 * dnode_buf_pageout()), it is possible for the meta dnode for the 976 * objset to have no holds even though os->os_dnodes is not empty. 977 */ 978 void 979 dmu_objset_evict(objset_t *os) 980 { 981 dsl_dataset_t *ds = os->os_dsl_dataset; 982 983 for (int t = 0; t < TXG_SIZE; t++) 984 ASSERT(!dmu_objset_is_dirty(os, t)); 985 986 if (ds) 987 dsl_prop_unregister_all(ds, os); 988 989 if (os->os_sa) 990 sa_tear_down(os); 991 992 dmu_objset_evict_dbufs(os); 993 994 mutex_enter(&os->os_lock); 995 spa_evicting_os_register(os->os_spa, os); 996 if (list_is_empty(&os->os_dnodes)) { 997 mutex_exit(&os->os_lock); 998 dmu_objset_evict_done(os); 999 } else { 1000 mutex_exit(&os->os_lock); 1001 } 1002 1003 1004 } 1005 1006 void 1007 dmu_objset_evict_done(objset_t *os) 1008 { 1009 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 1010 1011 dnode_special_close(&os->os_meta_dnode); 1012 if (DMU_USERUSED_DNODE(os)) { 1013 if (DMU_PROJECTUSED_DNODE(os)) 1014 dnode_special_close(&os->os_projectused_dnode); 1015 dnode_special_close(&os->os_userused_dnode); 1016 dnode_special_close(&os->os_groupused_dnode); 1017 } 1018 zil_free(os->os_zil); 1019 1020 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 1021 1022 /* 1023 * This is a barrier to prevent the objset from going away in 1024 * dnode_move() until we can safely ensure that the objset is still in 1025 * use. We consider the objset valid before the barrier and invalid 1026 * after the barrier. 1027 */ 1028 rw_enter(&os_lock, RW_READER); 1029 rw_exit(&os_lock); 1030 1031 kmem_free(os->os_obj_next_percpu, 1032 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1033 1034 mutex_destroy(&os->os_lock); 1035 mutex_destroy(&os->os_userused_lock); 1036 mutex_destroy(&os->os_obj_lock); 1037 mutex_destroy(&os->os_user_ptr_lock); 1038 mutex_destroy(&os->os_upgrade_lock); 1039 for (int i = 0; i < TXG_SIZE; i++) 1040 multilist_destroy(&os->os_dirty_dnodes[i]); 1041 spa_evicting_os_deregister(os->os_spa, os); 1042 kmem_free(os, sizeof (objset_t)); 1043 } 1044 1045 inode_timespec_t 1046 dmu_objset_snap_cmtime(objset_t *os) 1047 { 1048 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1049 } 1050 1051 objset_t * 1052 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1053 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1054 { 1055 objset_t *os; 1056 dnode_t *mdn; 1057 1058 ASSERT(dmu_tx_is_syncing(tx)); 1059 1060 if (blksz == 0) 1061 blksz = DNODE_BLOCK_SIZE; 1062 if (ibs == 0) 1063 ibs = DN_MAX_INDBLKSHIFT; 1064 1065 if (ds != NULL) 1066 VERIFY0(dmu_objset_from_ds(ds, &os)); 1067 else 1068 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1069 1070 mdn = DMU_META_DNODE(os); 1071 1072 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1073 DNODE_MIN_SLOTS, tx); 1074 1075 /* 1076 * We don't want to have to increase the meta-dnode's nlevels 1077 * later, because then we could do it in quiescing context while 1078 * we are also accessing it in open context. 1079 * 1080 * This precaution is not necessary for the MOS (ds == NULL), 1081 * because the MOS is only updated in syncing context. 1082 * This is most fortunate: the MOS is the only objset that 1083 * needs to be synced multiple times as spa_sync() iterates 1084 * to convergence, so minimizing its dn_nlevels matters. 1085 */ 1086 if (ds != NULL) { 1087 if (levels == 0) { 1088 levels = 1; 1089 1090 /* 1091 * Determine the number of levels necessary for the 1092 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1093 * that in order to ensure that we do not overflow 1094 * 64 bits, there has to be a nlevels that gives us a 1095 * number of blocks > DN_MAX_OBJECT but < 2^64. 1096 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1097 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1098 * (16). 1099 */ 1100 while ((uint64_t)mdn->dn_nblkptr << 1101 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1102 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1103 DN_MAX_OBJECT) 1104 levels++; 1105 } 1106 1107 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1108 mdn->dn_nlevels = levels; 1109 } 1110 1111 ASSERT(type != DMU_OST_NONE); 1112 ASSERT(type != DMU_OST_ANY); 1113 ASSERT(type < DMU_OST_NUMTYPES); 1114 os->os_phys->os_type = type; 1115 1116 /* 1117 * Enable user accounting if it is enabled and this is not an 1118 * encrypted receive. 1119 */ 1120 if (dmu_objset_userused_enabled(os) && 1121 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1122 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1123 if (dmu_objset_userobjused_enabled(os)) { 1124 ds->ds_feature_activation[ 1125 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1126 os->os_phys->os_flags |= 1127 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1128 } 1129 if (dmu_objset_projectquota_enabled(os)) { 1130 ds->ds_feature_activation[ 1131 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1132 os->os_phys->os_flags |= 1133 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1134 } 1135 os->os_flags = os->os_phys->os_flags; 1136 } 1137 1138 dsl_dataset_dirty(ds, tx); 1139 1140 return (os); 1141 } 1142 1143 /* called from dsl for meta-objset */ 1144 objset_t * 1145 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1146 dmu_objset_type_t type, dmu_tx_t *tx) 1147 { 1148 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1149 } 1150 1151 typedef struct dmu_objset_create_arg { 1152 const char *doca_name; 1153 cred_t *doca_cred; 1154 proc_t *doca_proc; 1155 void (*doca_userfunc)(objset_t *os, void *arg, 1156 cred_t *cr, dmu_tx_t *tx); 1157 void *doca_userarg; 1158 dmu_objset_type_t doca_type; 1159 uint64_t doca_flags; 1160 dsl_crypto_params_t *doca_dcp; 1161 } dmu_objset_create_arg_t; 1162 1163 static int 1164 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1165 { 1166 dmu_objset_create_arg_t *doca = arg; 1167 dsl_pool_t *dp = dmu_tx_pool(tx); 1168 dsl_dir_t *pdd; 1169 dsl_dataset_t *parentds; 1170 objset_t *parentos; 1171 const char *tail; 1172 int error; 1173 1174 if (strchr(doca->doca_name, '@') != NULL) 1175 return (SET_ERROR(EINVAL)); 1176 1177 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1178 return (SET_ERROR(ENAMETOOLONG)); 1179 1180 if (dataset_nestcheck(doca->doca_name) != 0) 1181 return (SET_ERROR(ENAMETOOLONG)); 1182 1183 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1184 if (error != 0) 1185 return (error); 1186 if (tail == NULL) { 1187 dsl_dir_rele(pdd, FTAG); 1188 return (SET_ERROR(EEXIST)); 1189 } 1190 1191 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1192 if (error != 0) { 1193 dsl_dir_rele(pdd, FTAG); 1194 return (error); 1195 } 1196 1197 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1198 doca->doca_cred, doca->doca_proc); 1199 if (error != 0) { 1200 dsl_dir_rele(pdd, FTAG); 1201 return (error); 1202 } 1203 1204 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1205 error = dsl_dataset_hold_obj(pdd->dd_pool, 1206 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1207 if (error != 0) { 1208 dsl_dir_rele(pdd, FTAG); 1209 return (error); 1210 } 1211 error = dmu_objset_from_ds(parentds, &parentos); 1212 if (error != 0) { 1213 dsl_dataset_rele(parentds, FTAG); 1214 dsl_dir_rele(pdd, FTAG); 1215 return (error); 1216 } 1217 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1218 dsl_dataset_rele(parentds, FTAG); 1219 dsl_dir_rele(pdd, FTAG); 1220 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1221 } 1222 dsl_dataset_rele(parentds, FTAG); 1223 dsl_dir_rele(pdd, FTAG); 1224 1225 return (error); 1226 } 1227 1228 static void 1229 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1230 { 1231 dmu_objset_create_arg_t *doca = arg; 1232 dsl_pool_t *dp = dmu_tx_pool(tx); 1233 spa_t *spa = dp->dp_spa; 1234 dsl_dir_t *pdd; 1235 const char *tail; 1236 dsl_dataset_t *ds; 1237 uint64_t obj; 1238 blkptr_t *bp; 1239 objset_t *os; 1240 zio_t *rzio; 1241 1242 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1243 1244 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1245 doca->doca_cred, doca->doca_dcp, tx); 1246 1247 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1248 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1249 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1250 bp = dsl_dataset_get_blkptr(ds); 1251 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1252 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1253 1254 if (doca->doca_userfunc != NULL) { 1255 doca->doca_userfunc(os, doca->doca_userarg, 1256 doca->doca_cred, tx); 1257 } 1258 1259 /* 1260 * The doca_userfunc() may write out some data that needs to be 1261 * encrypted if the dataset is encrypted (specifically the root 1262 * directory). This data must be written out before the encryption 1263 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1264 * I/O to occur immediately by invoking the relevant sections of 1265 * dsl_pool_sync(). 1266 */ 1267 if (os->os_encrypted) { 1268 dsl_dataset_t *tmpds = NULL; 1269 boolean_t need_sync_done = B_FALSE; 1270 1271 mutex_enter(&ds->ds_lock); 1272 ds->ds_owner = FTAG; 1273 mutex_exit(&ds->ds_lock); 1274 1275 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1276 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1277 tx->tx_txg); 1278 if (tmpds != NULL) { 1279 dsl_dataset_sync(ds, rzio, tx); 1280 need_sync_done = B_TRUE; 1281 } 1282 VERIFY0(zio_wait(rzio)); 1283 1284 dmu_objset_sync_done(os, tx); 1285 taskq_wait(dp->dp_sync_taskq); 1286 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1287 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1288 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1289 } 1290 1291 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1292 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1293 tx->tx_txg); 1294 if (tmpds != NULL) { 1295 dmu_buf_rele(ds->ds_dbuf, ds); 1296 dsl_dataset_sync(ds, rzio, tx); 1297 } 1298 VERIFY0(zio_wait(rzio)); 1299 1300 if (need_sync_done) { 1301 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1302 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1303 dsl_dataset_sync_done(ds, tx); 1304 } 1305 1306 mutex_enter(&ds->ds_lock); 1307 ds->ds_owner = NULL; 1308 mutex_exit(&ds->ds_lock); 1309 } 1310 1311 spa_history_log_internal_ds(ds, "create", tx, " "); 1312 1313 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1314 dsl_dir_rele(pdd, FTAG); 1315 } 1316 1317 int 1318 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1319 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1320 { 1321 dmu_objset_create_arg_t doca; 1322 dsl_crypto_params_t tmp_dcp = { 0 }; 1323 1324 doca.doca_name = name; 1325 doca.doca_cred = CRED(); 1326 doca.doca_proc = curproc; 1327 doca.doca_flags = flags; 1328 doca.doca_userfunc = func; 1329 doca.doca_userarg = arg; 1330 doca.doca_type = type; 1331 1332 /* 1333 * Some callers (mostly for testing) do not provide a dcp on their 1334 * own but various code inside the sync task will require it to be 1335 * allocated. Rather than adding NULL checks throughout this code 1336 * or adding dummy dcp's to all of the callers we simply create a 1337 * dummy one here and use that. This zero dcp will have the same 1338 * effect as asking for inheritance of all encryption params. 1339 */ 1340 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1341 1342 int rv = dsl_sync_task(name, 1343 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1344 6, ZFS_SPACE_CHECK_NORMAL); 1345 1346 if (rv == 0) 1347 zvol_create_minor(name); 1348 return (rv); 1349 } 1350 1351 typedef struct dmu_objset_clone_arg { 1352 const char *doca_clone; 1353 const char *doca_origin; 1354 cred_t *doca_cred; 1355 proc_t *doca_proc; 1356 } dmu_objset_clone_arg_t; 1357 1358 static int 1359 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1360 { 1361 dmu_objset_clone_arg_t *doca = arg; 1362 dsl_dir_t *pdd; 1363 const char *tail; 1364 int error; 1365 dsl_dataset_t *origin; 1366 dsl_pool_t *dp = dmu_tx_pool(tx); 1367 1368 if (strchr(doca->doca_clone, '@') != NULL) 1369 return (SET_ERROR(EINVAL)); 1370 1371 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1372 return (SET_ERROR(ENAMETOOLONG)); 1373 1374 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1375 if (error != 0) 1376 return (error); 1377 if (tail == NULL) { 1378 dsl_dir_rele(pdd, FTAG); 1379 return (SET_ERROR(EEXIST)); 1380 } 1381 1382 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1383 doca->doca_cred, doca->doca_proc); 1384 if (error != 0) { 1385 dsl_dir_rele(pdd, FTAG); 1386 return (SET_ERROR(EDQUOT)); 1387 } 1388 1389 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1390 if (error != 0) { 1391 dsl_dir_rele(pdd, FTAG); 1392 return (error); 1393 } 1394 1395 /* You can only clone snapshots, not the head datasets. */ 1396 if (!origin->ds_is_snapshot) { 1397 dsl_dataset_rele(origin, FTAG); 1398 dsl_dir_rele(pdd, FTAG); 1399 return (SET_ERROR(EINVAL)); 1400 } 1401 1402 dsl_dataset_rele(origin, FTAG); 1403 dsl_dir_rele(pdd, FTAG); 1404 1405 return (0); 1406 } 1407 1408 static void 1409 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1410 { 1411 dmu_objset_clone_arg_t *doca = arg; 1412 dsl_pool_t *dp = dmu_tx_pool(tx); 1413 dsl_dir_t *pdd; 1414 const char *tail; 1415 dsl_dataset_t *origin, *ds; 1416 uint64_t obj; 1417 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1418 1419 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1420 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1421 1422 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1423 doca->doca_cred, NULL, tx); 1424 1425 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1426 dsl_dataset_name(origin, namebuf); 1427 spa_history_log_internal_ds(ds, "clone", tx, 1428 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1429 dsl_dataset_rele(ds, FTAG); 1430 dsl_dataset_rele(origin, FTAG); 1431 dsl_dir_rele(pdd, FTAG); 1432 } 1433 1434 int 1435 dmu_objset_clone(const char *clone, const char *origin) 1436 { 1437 dmu_objset_clone_arg_t doca; 1438 1439 doca.doca_clone = clone; 1440 doca.doca_origin = origin; 1441 doca.doca_cred = CRED(); 1442 doca.doca_proc = curproc; 1443 1444 int rv = dsl_sync_task(clone, 1445 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1446 6, ZFS_SPACE_CHECK_NORMAL); 1447 1448 if (rv == 0) 1449 zvol_create_minor(clone); 1450 1451 return (rv); 1452 } 1453 1454 int 1455 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1456 { 1457 int err; 1458 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1459 nvlist_t *snaps = fnvlist_alloc(); 1460 1461 fnvlist_add_boolean(snaps, longsnap); 1462 kmem_strfree(longsnap); 1463 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1464 fnvlist_free(snaps); 1465 return (err); 1466 } 1467 1468 static void 1469 dmu_objset_upgrade_task_cb(void *data) 1470 { 1471 objset_t *os = data; 1472 1473 mutex_enter(&os->os_upgrade_lock); 1474 os->os_upgrade_status = EINTR; 1475 if (!os->os_upgrade_exit) { 1476 int status; 1477 1478 mutex_exit(&os->os_upgrade_lock); 1479 1480 status = os->os_upgrade_cb(os); 1481 1482 mutex_enter(&os->os_upgrade_lock); 1483 1484 os->os_upgrade_status = status; 1485 } 1486 os->os_upgrade_exit = B_TRUE; 1487 os->os_upgrade_id = 0; 1488 mutex_exit(&os->os_upgrade_lock); 1489 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1490 } 1491 1492 static void 1493 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1494 { 1495 if (os->os_upgrade_id != 0) 1496 return; 1497 1498 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1499 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1500 1501 mutex_enter(&os->os_upgrade_lock); 1502 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1503 os->os_upgrade_exit = B_FALSE; 1504 os->os_upgrade_cb = cb; 1505 os->os_upgrade_id = taskq_dispatch( 1506 os->os_spa->spa_upgrade_taskq, 1507 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1508 if (os->os_upgrade_id == TASKQID_INVALID) { 1509 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1510 os->os_upgrade_status = ENOMEM; 1511 } 1512 } else { 1513 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1514 } 1515 mutex_exit(&os->os_upgrade_lock); 1516 } 1517 1518 static void 1519 dmu_objset_upgrade_stop(objset_t *os) 1520 { 1521 mutex_enter(&os->os_upgrade_lock); 1522 os->os_upgrade_exit = B_TRUE; 1523 if (os->os_upgrade_id != 0) { 1524 taskqid_t id = os->os_upgrade_id; 1525 1526 os->os_upgrade_id = 0; 1527 mutex_exit(&os->os_upgrade_lock); 1528 1529 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1530 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1531 } 1532 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1533 } else { 1534 mutex_exit(&os->os_upgrade_lock); 1535 } 1536 } 1537 1538 static void 1539 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1540 { 1541 dnode_t *dn; 1542 1543 while ((dn = multilist_sublist_head(list)) != NULL) { 1544 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1545 ASSERT(dn->dn_dbuf->db_data_pending); 1546 /* 1547 * Initialize dn_zio outside dnode_sync() because the 1548 * meta-dnode needs to set it outside dnode_sync(). 1549 */ 1550 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1551 ASSERT(dn->dn_zio); 1552 1553 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1554 multilist_sublist_remove(list, dn); 1555 1556 /* 1557 * See the comment above dnode_rele_task() for an explanation 1558 * of why this dnode hold is always needed (even when not 1559 * doing user accounting). 1560 */ 1561 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1562 (void) dnode_add_ref(dn, newlist); 1563 multilist_insert(newlist, dn); 1564 1565 dnode_sync(dn, tx); 1566 } 1567 } 1568 1569 static void 1570 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1571 { 1572 (void) abuf; 1573 blkptr_t *bp = zio->io_bp; 1574 objset_t *os = arg; 1575 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1576 uint64_t fill = 0; 1577 1578 ASSERT(!BP_IS_EMBEDDED(bp)); 1579 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1580 ASSERT0(BP_GET_LEVEL(bp)); 1581 1582 /* 1583 * Update rootbp fill count: it should be the number of objects 1584 * allocated in the object set (not counting the "special" 1585 * objects that are stored in the objset_phys_t -- the meta 1586 * dnode and user/group/project accounting objects). 1587 */ 1588 for (int i = 0; i < dnp->dn_nblkptr; i++) 1589 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1590 1591 BP_SET_FILL(bp, fill); 1592 1593 if (os->os_dsl_dataset != NULL) 1594 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1595 *os->os_rootbp = *bp; 1596 if (os->os_dsl_dataset != NULL) 1597 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1598 } 1599 1600 static void 1601 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1602 { 1603 (void) abuf; 1604 blkptr_t *bp = zio->io_bp; 1605 blkptr_t *bp_orig = &zio->io_bp_orig; 1606 objset_t *os = arg; 1607 1608 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1609 ASSERT(BP_EQUAL(bp, bp_orig)); 1610 } else { 1611 dsl_dataset_t *ds = os->os_dsl_dataset; 1612 dmu_tx_t *tx = os->os_synctx; 1613 1614 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1615 dsl_dataset_block_born(ds, bp, tx); 1616 } 1617 kmem_free(bp, sizeof (*bp)); 1618 } 1619 1620 typedef struct sync_dnodes_arg { 1621 multilist_t *sda_list; 1622 int sda_sublist_idx; 1623 multilist_t *sda_newlist; 1624 dmu_tx_t *sda_tx; 1625 } sync_dnodes_arg_t; 1626 1627 static void 1628 sync_dnodes_task(void *arg) 1629 { 1630 sync_dnodes_arg_t *sda = arg; 1631 1632 multilist_sublist_t *ms = 1633 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1634 1635 dmu_objset_sync_dnodes(ms, sda->sda_tx); 1636 1637 multilist_sublist_unlock(ms); 1638 1639 kmem_free(sda, sizeof (*sda)); 1640 } 1641 1642 1643 /* called from dsl */ 1644 void 1645 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1646 { 1647 int txgoff; 1648 zbookmark_phys_t zb; 1649 zio_prop_t zp; 1650 zio_t *zio; 1651 list_t *list; 1652 dbuf_dirty_record_t *dr; 1653 int num_sublists; 1654 multilist_t *ml; 1655 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1656 *blkptr_copy = *os->os_rootbp; 1657 1658 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1659 1660 ASSERT(dmu_tx_is_syncing(tx)); 1661 /* XXX the write_done callback should really give us the tx... */ 1662 os->os_synctx = tx; 1663 1664 if (os->os_dsl_dataset == NULL) { 1665 /* 1666 * This is the MOS. If we have upgraded, 1667 * spa_max_replication() could change, so reset 1668 * os_copies here. 1669 */ 1670 os->os_copies = spa_max_replication(os->os_spa); 1671 } 1672 1673 /* 1674 * Create the root block IO 1675 */ 1676 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1677 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1678 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1679 arc_release(os->os_phys_buf, &os->os_phys_buf); 1680 1681 dmu_write_policy(os, NULL, 0, 0, &zp); 1682 1683 /* 1684 * If we are either claiming the ZIL or doing a raw receive, write 1685 * out the os_phys_buf raw. Neither of these actions will effect the 1686 * MAC at this point. 1687 */ 1688 if (os->os_raw_receive || 1689 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1690 ASSERT(os->os_encrypted); 1691 arc_convert_to_raw(os->os_phys_buf, 1692 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1693 DMU_OT_OBJSET, NULL, NULL, NULL); 1694 } 1695 1696 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1697 blkptr_copy, os->os_phys_buf, B_FALSE, dmu_os_is_l2cacheable(os), 1698 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done, 1699 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1700 1701 /* 1702 * Sync special dnodes - the parent IO for the sync is the root block 1703 */ 1704 DMU_META_DNODE(os)->dn_zio = zio; 1705 dnode_sync(DMU_META_DNODE(os), tx); 1706 1707 os->os_phys->os_flags = os->os_flags; 1708 1709 if (DMU_USERUSED_DNODE(os) && 1710 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1711 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1712 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1713 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1714 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1715 } 1716 1717 if (DMU_PROJECTUSED_DNODE(os) && 1718 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1719 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1720 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1721 } 1722 1723 txgoff = tx->tx_txg & TXG_MASK; 1724 1725 /* 1726 * We must create the list here because it uses the 1727 * dn_dirty_link[] of this txg. But it may already 1728 * exist because we call dsl_dataset_sync() twice per txg. 1729 */ 1730 if (os->os_synced_dnodes.ml_sublists == NULL) { 1731 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1732 offsetof(dnode_t, dn_dirty_link[txgoff]), 1733 dnode_multilist_index_func); 1734 } else { 1735 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1736 offsetof(dnode_t, dn_dirty_link[txgoff])); 1737 } 1738 1739 ml = &os->os_dirty_dnodes[txgoff]; 1740 num_sublists = multilist_get_num_sublists(ml); 1741 for (int i = 0; i < num_sublists; i++) { 1742 if (multilist_sublist_is_empty_idx(ml, i)) 1743 continue; 1744 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1745 sda->sda_list = ml; 1746 sda->sda_sublist_idx = i; 1747 sda->sda_tx = tx; 1748 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1749 sync_dnodes_task, sda, 0); 1750 /* callback frees sda */ 1751 } 1752 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1753 1754 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1755 while ((dr = list_head(list)) != NULL) { 1756 ASSERT0(dr->dr_dbuf->db_level); 1757 list_remove(list, dr); 1758 zio_nowait(dr->dr_zio); 1759 } 1760 1761 /* Enable dnode backfill if enough objects have been freed. */ 1762 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1763 os->os_rescan_dnodes = B_TRUE; 1764 os->os_freed_dnodes = 0; 1765 } 1766 1767 /* 1768 * Free intent log blocks up to this tx. 1769 */ 1770 zil_sync(os->os_zil, tx); 1771 os->os_phys->os_zil_header = os->os_zil_header; 1772 zio_nowait(zio); 1773 } 1774 1775 boolean_t 1776 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1777 { 1778 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1779 } 1780 1781 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1782 1783 void 1784 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1785 { 1786 file_cbs[ost] = cb; 1787 } 1788 1789 int 1790 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1791 zfs_file_info_t *zfi) 1792 { 1793 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1794 if (cb == NULL) 1795 return (EINVAL); 1796 return (cb(bonustype, data, zfi)); 1797 } 1798 1799 boolean_t 1800 dmu_objset_userused_enabled(objset_t *os) 1801 { 1802 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1803 file_cbs[os->os_phys->os_type] != NULL && 1804 DMU_USERUSED_DNODE(os) != NULL); 1805 } 1806 1807 boolean_t 1808 dmu_objset_userobjused_enabled(objset_t *os) 1809 { 1810 return (dmu_objset_userused_enabled(os) && 1811 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1812 } 1813 1814 boolean_t 1815 dmu_objset_projectquota_enabled(objset_t *os) 1816 { 1817 return (file_cbs[os->os_phys->os_type] != NULL && 1818 DMU_PROJECTUSED_DNODE(os) != NULL && 1819 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1820 } 1821 1822 typedef struct userquota_node { 1823 /* must be in the first filed, see userquota_update_cache() */ 1824 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1825 int64_t uqn_delta; 1826 avl_node_t uqn_node; 1827 } userquota_node_t; 1828 1829 typedef struct userquota_cache { 1830 avl_tree_t uqc_user_deltas; 1831 avl_tree_t uqc_group_deltas; 1832 avl_tree_t uqc_project_deltas; 1833 } userquota_cache_t; 1834 1835 static int 1836 userquota_compare(const void *l, const void *r) 1837 { 1838 const userquota_node_t *luqn = l; 1839 const userquota_node_t *ruqn = r; 1840 int rv; 1841 1842 /* 1843 * NB: can only access uqn_id because userquota_update_cache() doesn't 1844 * pass in an entire userquota_node_t. 1845 */ 1846 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1847 1848 return (TREE_ISIGN(rv)); 1849 } 1850 1851 static void 1852 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1853 { 1854 void *cookie; 1855 userquota_node_t *uqn; 1856 1857 ASSERT(dmu_tx_is_syncing(tx)); 1858 1859 cookie = NULL; 1860 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1861 &cookie)) != NULL) { 1862 /* 1863 * os_userused_lock protects against concurrent calls to 1864 * zap_increment_int(). It's needed because zap_increment_int() 1865 * is not thread-safe (i.e. not atomic). 1866 */ 1867 mutex_enter(&os->os_userused_lock); 1868 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1869 uqn->uqn_id, uqn->uqn_delta, tx)); 1870 mutex_exit(&os->os_userused_lock); 1871 kmem_free(uqn, sizeof (*uqn)); 1872 } 1873 avl_destroy(&cache->uqc_user_deltas); 1874 1875 cookie = NULL; 1876 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1877 &cookie)) != NULL) { 1878 mutex_enter(&os->os_userused_lock); 1879 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1880 uqn->uqn_id, uqn->uqn_delta, tx)); 1881 mutex_exit(&os->os_userused_lock); 1882 kmem_free(uqn, sizeof (*uqn)); 1883 } 1884 avl_destroy(&cache->uqc_group_deltas); 1885 1886 if (dmu_objset_projectquota_enabled(os)) { 1887 cookie = NULL; 1888 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1889 &cookie)) != NULL) { 1890 mutex_enter(&os->os_userused_lock); 1891 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1892 uqn->uqn_id, uqn->uqn_delta, tx)); 1893 mutex_exit(&os->os_userused_lock); 1894 kmem_free(uqn, sizeof (*uqn)); 1895 } 1896 avl_destroy(&cache->uqc_project_deltas); 1897 } 1898 } 1899 1900 static void 1901 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1902 { 1903 userquota_node_t *uqn; 1904 avl_index_t idx; 1905 1906 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1907 /* 1908 * Use id directly for searching because uqn_id is the first field of 1909 * userquota_node_t and fields after uqn_id won't be accessed in 1910 * avl_find(). 1911 */ 1912 uqn = avl_find(avl, (const void *)id, &idx); 1913 if (uqn == NULL) { 1914 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1915 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1916 avl_insert(avl, uqn, idx); 1917 } 1918 uqn->uqn_delta += delta; 1919 } 1920 1921 static void 1922 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1923 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1924 boolean_t subtract) 1925 { 1926 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1927 int64_t delta = DNODE_MIN_SIZE + used; 1928 char name[20]; 1929 1930 if (subtract) 1931 delta = -delta; 1932 1933 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1934 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1935 1936 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1937 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1938 1939 if (dmu_objset_projectquota_enabled(os)) { 1940 (void) snprintf(name, sizeof (name), "%llx", 1941 (longlong_t)project); 1942 userquota_update_cache(&cache->uqc_project_deltas, 1943 name, delta); 1944 } 1945 } 1946 } 1947 1948 static void 1949 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1950 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1951 { 1952 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1953 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1954 int delta = subtract ? -1 : 1; 1955 1956 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1957 (longlong_t)user); 1958 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1959 1960 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1961 (longlong_t)group); 1962 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1963 1964 if (dmu_objset_projectquota_enabled(os)) { 1965 (void) snprintf(name, sizeof (name), 1966 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1967 userquota_update_cache(&cache->uqc_project_deltas, 1968 name, delta); 1969 } 1970 } 1971 } 1972 1973 typedef struct userquota_updates_arg { 1974 objset_t *uua_os; 1975 int uua_sublist_idx; 1976 dmu_tx_t *uua_tx; 1977 } userquota_updates_arg_t; 1978 1979 static void 1980 userquota_updates_task(void *arg) 1981 { 1982 userquota_updates_arg_t *uua = arg; 1983 objset_t *os = uua->uua_os; 1984 dmu_tx_t *tx = uua->uua_tx; 1985 dnode_t *dn; 1986 userquota_cache_t cache = { { 0 } }; 1987 1988 multilist_sublist_t *list = 1989 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 1990 1991 ASSERT(multilist_sublist_head(list) == NULL || 1992 dmu_objset_userused_enabled(os)); 1993 avl_create(&cache.uqc_user_deltas, userquota_compare, 1994 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1995 avl_create(&cache.uqc_group_deltas, userquota_compare, 1996 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1997 if (dmu_objset_projectquota_enabled(os)) 1998 avl_create(&cache.uqc_project_deltas, userquota_compare, 1999 sizeof (userquota_node_t), offsetof(userquota_node_t, 2000 uqn_node)); 2001 2002 while ((dn = multilist_sublist_head(list)) != NULL) { 2003 int flags; 2004 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2005 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2006 dn->dn_phys->dn_flags & 2007 DNODE_FLAG_USERUSED_ACCOUNTED); 2008 2009 flags = dn->dn_id_flags; 2010 ASSERT(flags); 2011 if (flags & DN_ID_OLD_EXIST) { 2012 do_userquota_update(os, &cache, dn->dn_oldused, 2013 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2014 dn->dn_oldprojid, B_TRUE); 2015 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2016 dn->dn_olduid, dn->dn_oldgid, 2017 dn->dn_oldprojid, B_TRUE); 2018 } 2019 if (flags & DN_ID_NEW_EXIST) { 2020 do_userquota_update(os, &cache, 2021 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2022 dn->dn_newuid, dn->dn_newgid, 2023 dn->dn_newprojid, B_FALSE); 2024 do_userobjquota_update(os, &cache, 2025 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2026 dn->dn_newprojid, B_FALSE); 2027 } 2028 2029 mutex_enter(&dn->dn_mtx); 2030 dn->dn_oldused = 0; 2031 dn->dn_oldflags = 0; 2032 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2033 dn->dn_olduid = dn->dn_newuid; 2034 dn->dn_oldgid = dn->dn_newgid; 2035 dn->dn_oldprojid = dn->dn_newprojid; 2036 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2037 if (dn->dn_bonuslen == 0) 2038 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2039 else 2040 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2041 } 2042 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2043 mutex_exit(&dn->dn_mtx); 2044 2045 multilist_sublist_remove(list, dn); 2046 dnode_rele(dn, &os->os_synced_dnodes); 2047 } 2048 do_userquota_cacheflush(os, &cache, tx); 2049 multilist_sublist_unlock(list); 2050 kmem_free(uua, sizeof (*uua)); 2051 } 2052 2053 /* 2054 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2055 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2056 * evicted because the block containing the dnode can't be evicted until it is 2057 * written out. However, this hold is necessary to prevent the dnode_t from 2058 * being moved (via dnode_move()) while it's still referenced by 2059 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2060 * dirty_lightweight_leaf-type dirty records. 2061 * 2062 * If we are doing user-object accounting, the dnode_rele() happens from 2063 * userquota_updates_task() instead. 2064 */ 2065 static void 2066 dnode_rele_task(void *arg) 2067 { 2068 userquota_updates_arg_t *uua = arg; 2069 objset_t *os = uua->uua_os; 2070 2071 multilist_sublist_t *list = 2072 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2073 2074 dnode_t *dn; 2075 while ((dn = multilist_sublist_head(list)) != NULL) { 2076 multilist_sublist_remove(list, dn); 2077 dnode_rele(dn, &os->os_synced_dnodes); 2078 } 2079 multilist_sublist_unlock(list); 2080 kmem_free(uua, sizeof (*uua)); 2081 } 2082 2083 /* 2084 * Return TRUE if userquota updates are needed. 2085 */ 2086 static boolean_t 2087 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2088 { 2089 if (!dmu_objset_userused_enabled(os)) 2090 return (B_FALSE); 2091 2092 /* 2093 * If this is a raw receive just return and handle accounting 2094 * later when we have the keys loaded. We also don't do user 2095 * accounting during claiming since the datasets are not owned 2096 * for the duration of claiming and this txg should only be 2097 * used for recovery. 2098 */ 2099 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2100 return (B_FALSE); 2101 2102 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2103 return (B_FALSE); 2104 2105 /* Allocate the user/group/project used objects if necessary. */ 2106 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2107 VERIFY0(zap_create_claim(os, 2108 DMU_USERUSED_OBJECT, 2109 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2110 VERIFY0(zap_create_claim(os, 2111 DMU_GROUPUSED_OBJECT, 2112 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2113 } 2114 2115 if (dmu_objset_projectquota_enabled(os) && 2116 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2117 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2118 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2119 } 2120 return (B_TRUE); 2121 } 2122 2123 /* 2124 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2125 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2126 * The caller must taskq_wait(dp_sync_taskq). 2127 */ 2128 void 2129 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2130 { 2131 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2132 2133 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2134 for (int i = 0; i < num_sublists; i++) { 2135 userquota_updates_arg_t *uua = 2136 kmem_alloc(sizeof (*uua), KM_SLEEP); 2137 uua->uua_os = os; 2138 uua->uua_sublist_idx = i; 2139 uua->uua_tx = tx; 2140 2141 /* 2142 * If we don't need to update userquotas, use 2143 * dnode_rele_task() to call dnode_rele() 2144 */ 2145 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2146 need_userquota ? userquota_updates_task : dnode_rele_task, 2147 uua, 0); 2148 /* callback frees uua */ 2149 } 2150 } 2151 2152 2153 /* 2154 * Returns a pointer to data to find uid/gid from 2155 * 2156 * If a dirty record for transaction group that is syncing can't 2157 * be found then NULL is returned. In the NULL case it is assumed 2158 * the uid/gid aren't changing. 2159 */ 2160 static void * 2161 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2162 { 2163 dbuf_dirty_record_t *dr; 2164 void *data; 2165 2166 if (db->db_dirtycnt == 0) 2167 return (db->db.db_data); /* Nothing is changing */ 2168 2169 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2170 2171 if (dr == NULL) { 2172 data = NULL; 2173 } else { 2174 if (dr->dr_dnode->dn_bonuslen == 0 && 2175 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2176 data = dr->dt.dl.dr_data->b_data; 2177 else 2178 data = dr->dt.dl.dr_data; 2179 } 2180 2181 return (data); 2182 } 2183 2184 void 2185 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2186 { 2187 objset_t *os = dn->dn_objset; 2188 void *data = NULL; 2189 dmu_buf_impl_t *db = NULL; 2190 int flags = dn->dn_id_flags; 2191 int error; 2192 boolean_t have_spill = B_FALSE; 2193 2194 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2195 return; 2196 2197 /* 2198 * Raw receives introduce a problem with user accounting. Raw 2199 * receives cannot update the user accounting info because the 2200 * user ids and the sizes are encrypted. To guarantee that we 2201 * never end up with bad user accounting, we simply disable it 2202 * during raw receives. We also disable this for normal receives 2203 * so that an incremental raw receive may be done on top of an 2204 * existing non-raw receive. 2205 */ 2206 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2207 return; 2208 2209 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2210 DN_ID_CHKED_SPILL))) 2211 return; 2212 2213 if (before && dn->dn_bonuslen != 0) 2214 data = DN_BONUS(dn->dn_phys); 2215 else if (!before && dn->dn_bonuslen != 0) { 2216 if (dn->dn_bonus) { 2217 db = dn->dn_bonus; 2218 mutex_enter(&db->db_mtx); 2219 data = dmu_objset_userquota_find_data(db, tx); 2220 } else { 2221 data = DN_BONUS(dn->dn_phys); 2222 } 2223 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2224 int rf = 0; 2225 2226 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2227 rf |= DB_RF_HAVESTRUCT; 2228 error = dmu_spill_hold_by_dnode(dn, 2229 rf | DB_RF_MUST_SUCCEED, 2230 FTAG, (dmu_buf_t **)&db); 2231 ASSERT(error == 0); 2232 mutex_enter(&db->db_mtx); 2233 data = (before) ? db->db.db_data : 2234 dmu_objset_userquota_find_data(db, tx); 2235 have_spill = B_TRUE; 2236 } else { 2237 mutex_enter(&dn->dn_mtx); 2238 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2239 mutex_exit(&dn->dn_mtx); 2240 return; 2241 } 2242 2243 /* 2244 * Must always call the callback in case the object 2245 * type has changed and that type isn't an object type to track 2246 */ 2247 zfs_file_info_t zfi; 2248 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2249 2250 if (before) { 2251 ASSERT(data); 2252 dn->dn_olduid = zfi.zfi_user; 2253 dn->dn_oldgid = zfi.zfi_group; 2254 dn->dn_oldprojid = zfi.zfi_project; 2255 } else if (data) { 2256 dn->dn_newuid = zfi.zfi_user; 2257 dn->dn_newgid = zfi.zfi_group; 2258 dn->dn_newprojid = zfi.zfi_project; 2259 } 2260 2261 /* 2262 * Preserve existing uid/gid when the callback can't determine 2263 * what the new uid/gid are and the callback returned EEXIST. 2264 * The EEXIST error tells us to just use the existing uid/gid. 2265 * If we don't know what the old values are then just assign 2266 * them to 0, since that is a new file being created. 2267 */ 2268 if (!before && data == NULL && error == EEXIST) { 2269 if (flags & DN_ID_OLD_EXIST) { 2270 dn->dn_newuid = dn->dn_olduid; 2271 dn->dn_newgid = dn->dn_oldgid; 2272 dn->dn_newprojid = dn->dn_oldprojid; 2273 } else { 2274 dn->dn_newuid = 0; 2275 dn->dn_newgid = 0; 2276 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2277 } 2278 error = 0; 2279 } 2280 2281 if (db) 2282 mutex_exit(&db->db_mtx); 2283 2284 mutex_enter(&dn->dn_mtx); 2285 if (error == 0 && before) 2286 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2287 if (error == 0 && !before) 2288 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2289 2290 if (have_spill) { 2291 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2292 } else { 2293 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2294 } 2295 mutex_exit(&dn->dn_mtx); 2296 if (have_spill) 2297 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2298 } 2299 2300 boolean_t 2301 dmu_objset_userspace_present(objset_t *os) 2302 { 2303 return (os->os_phys->os_flags & 2304 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2305 } 2306 2307 boolean_t 2308 dmu_objset_userobjspace_present(objset_t *os) 2309 { 2310 return (os->os_phys->os_flags & 2311 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2312 } 2313 2314 boolean_t 2315 dmu_objset_projectquota_present(objset_t *os) 2316 { 2317 return (os->os_phys->os_flags & 2318 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2319 } 2320 2321 static int 2322 dmu_objset_space_upgrade(objset_t *os) 2323 { 2324 uint64_t obj; 2325 int err = 0; 2326 2327 /* 2328 * We simply need to mark every object dirty, so that it will be 2329 * synced out and now accounted. If this is called 2330 * concurrently, or if we already did some work before crashing, 2331 * that's fine, since we track each object's accounted state 2332 * independently. 2333 */ 2334 2335 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2336 dmu_tx_t *tx; 2337 dmu_buf_t *db; 2338 int objerr; 2339 2340 mutex_enter(&os->os_upgrade_lock); 2341 if (os->os_upgrade_exit) 2342 err = SET_ERROR(EINTR); 2343 mutex_exit(&os->os_upgrade_lock); 2344 if (err != 0) 2345 return (err); 2346 2347 if (issig(JUSTLOOKING) && issig(FORREAL)) 2348 return (SET_ERROR(EINTR)); 2349 2350 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2351 if (objerr != 0) 2352 continue; 2353 tx = dmu_tx_create(os); 2354 dmu_tx_hold_bonus(tx, obj); 2355 objerr = dmu_tx_assign(tx, TXG_WAIT); 2356 if (objerr != 0) { 2357 dmu_buf_rele(db, FTAG); 2358 dmu_tx_abort(tx); 2359 continue; 2360 } 2361 dmu_buf_will_dirty(db, tx); 2362 dmu_buf_rele(db, FTAG); 2363 dmu_tx_commit(tx); 2364 } 2365 return (0); 2366 } 2367 2368 static int 2369 dmu_objset_userspace_upgrade_cb(objset_t *os) 2370 { 2371 int err = 0; 2372 2373 if (dmu_objset_userspace_present(os)) 2374 return (0); 2375 if (dmu_objset_is_snapshot(os)) 2376 return (SET_ERROR(EINVAL)); 2377 if (!dmu_objset_userused_enabled(os)) 2378 return (SET_ERROR(ENOTSUP)); 2379 2380 err = dmu_objset_space_upgrade(os); 2381 if (err) 2382 return (err); 2383 2384 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2385 txg_wait_synced(dmu_objset_pool(os), 0); 2386 return (0); 2387 } 2388 2389 void 2390 dmu_objset_userspace_upgrade(objset_t *os) 2391 { 2392 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2393 } 2394 2395 static int 2396 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2397 { 2398 int err = 0; 2399 2400 if (dmu_objset_userobjspace_present(os) && 2401 dmu_objset_projectquota_present(os)) 2402 return (0); 2403 if (dmu_objset_is_snapshot(os)) 2404 return (SET_ERROR(EINVAL)); 2405 if (!dmu_objset_userused_enabled(os)) 2406 return (SET_ERROR(ENOTSUP)); 2407 if (!dmu_objset_projectquota_enabled(os) && 2408 dmu_objset_userobjspace_present(os)) 2409 return (SET_ERROR(ENOTSUP)); 2410 2411 err = dmu_objset_space_upgrade(os); 2412 if (err) 2413 return (err); 2414 2415 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2416 if (dmu_objset_userobjused_enabled(os)) 2417 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2418 if (dmu_objset_projectquota_enabled(os)) 2419 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2420 2421 txg_wait_synced(dmu_objset_pool(os), 0); 2422 return (0); 2423 } 2424 2425 void 2426 dmu_objset_id_quota_upgrade(objset_t *os) 2427 { 2428 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2429 } 2430 2431 boolean_t 2432 dmu_objset_userobjspace_upgradable(objset_t *os) 2433 { 2434 return (dmu_objset_type(os) == DMU_OST_ZFS && 2435 !dmu_objset_is_snapshot(os) && 2436 dmu_objset_userobjused_enabled(os) && 2437 !dmu_objset_userobjspace_present(os) && 2438 spa_writeable(dmu_objset_spa(os))); 2439 } 2440 2441 boolean_t 2442 dmu_objset_projectquota_upgradable(objset_t *os) 2443 { 2444 return (dmu_objset_type(os) == DMU_OST_ZFS && 2445 !dmu_objset_is_snapshot(os) && 2446 dmu_objset_projectquota_enabled(os) && 2447 !dmu_objset_projectquota_present(os) && 2448 spa_writeable(dmu_objset_spa(os))); 2449 } 2450 2451 void 2452 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2453 uint64_t *usedobjsp, uint64_t *availobjsp) 2454 { 2455 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2456 usedobjsp, availobjsp); 2457 } 2458 2459 uint64_t 2460 dmu_objset_fsid_guid(objset_t *os) 2461 { 2462 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2463 } 2464 2465 void 2466 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2467 { 2468 stat->dds_type = os->os_phys->os_type; 2469 if (os->os_dsl_dataset) 2470 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2471 } 2472 2473 void 2474 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2475 { 2476 ASSERT(os->os_dsl_dataset || 2477 os->os_phys->os_type == DMU_OST_META); 2478 2479 if (os->os_dsl_dataset != NULL) 2480 dsl_dataset_stats(os->os_dsl_dataset, nv); 2481 2482 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2483 os->os_phys->os_type); 2484 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2485 dmu_objset_userspace_present(os)); 2486 } 2487 2488 int 2489 dmu_objset_is_snapshot(objset_t *os) 2490 { 2491 if (os->os_dsl_dataset != NULL) 2492 return (os->os_dsl_dataset->ds_is_snapshot); 2493 else 2494 return (B_FALSE); 2495 } 2496 2497 int 2498 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2499 boolean_t *conflict) 2500 { 2501 dsl_dataset_t *ds = os->os_dsl_dataset; 2502 uint64_t ignored; 2503 2504 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2505 return (SET_ERROR(ENOENT)); 2506 2507 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2508 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2509 MT_NORMALIZE, real, maxlen, conflict)); 2510 } 2511 2512 int 2513 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2514 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2515 { 2516 dsl_dataset_t *ds = os->os_dsl_dataset; 2517 zap_cursor_t cursor; 2518 zap_attribute_t attr; 2519 2520 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2521 2522 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2523 return (SET_ERROR(ENOENT)); 2524 2525 zap_cursor_init_serialized(&cursor, 2526 ds->ds_dir->dd_pool->dp_meta_objset, 2527 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2528 2529 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2530 zap_cursor_fini(&cursor); 2531 return (SET_ERROR(ENOENT)); 2532 } 2533 2534 if (strlen(attr.za_name) + 1 > namelen) { 2535 zap_cursor_fini(&cursor); 2536 return (SET_ERROR(ENAMETOOLONG)); 2537 } 2538 2539 (void) strlcpy(name, attr.za_name, namelen); 2540 if (idp) 2541 *idp = attr.za_first_integer; 2542 if (case_conflict) 2543 *case_conflict = attr.za_normalization_conflict; 2544 zap_cursor_advance(&cursor); 2545 *offp = zap_cursor_serialize(&cursor); 2546 zap_cursor_fini(&cursor); 2547 2548 return (0); 2549 } 2550 2551 int 2552 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2553 { 2554 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2555 } 2556 2557 int 2558 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2559 uint64_t *idp, uint64_t *offp) 2560 { 2561 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2562 zap_cursor_t cursor; 2563 zap_attribute_t attr; 2564 2565 /* there is no next dir on a snapshot! */ 2566 if (os->os_dsl_dataset->ds_object != 2567 dsl_dir_phys(dd)->dd_head_dataset_obj) 2568 return (SET_ERROR(ENOENT)); 2569 2570 zap_cursor_init_serialized(&cursor, 2571 dd->dd_pool->dp_meta_objset, 2572 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2573 2574 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2575 zap_cursor_fini(&cursor); 2576 return (SET_ERROR(ENOENT)); 2577 } 2578 2579 if (strlen(attr.za_name) + 1 > namelen) { 2580 zap_cursor_fini(&cursor); 2581 return (SET_ERROR(ENAMETOOLONG)); 2582 } 2583 2584 (void) strlcpy(name, attr.za_name, namelen); 2585 if (idp) 2586 *idp = attr.za_first_integer; 2587 zap_cursor_advance(&cursor); 2588 *offp = zap_cursor_serialize(&cursor); 2589 zap_cursor_fini(&cursor); 2590 2591 return (0); 2592 } 2593 2594 typedef struct dmu_objset_find_ctx { 2595 taskq_t *dc_tq; 2596 dsl_pool_t *dc_dp; 2597 uint64_t dc_ddobj; 2598 char *dc_ddname; /* last component of ddobj's name */ 2599 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2600 void *dc_arg; 2601 int dc_flags; 2602 kmutex_t *dc_error_lock; 2603 int *dc_error; 2604 } dmu_objset_find_ctx_t; 2605 2606 static void 2607 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2608 { 2609 dsl_pool_t *dp = dcp->dc_dp; 2610 dsl_dir_t *dd; 2611 dsl_dataset_t *ds; 2612 zap_cursor_t zc; 2613 zap_attribute_t *attr; 2614 uint64_t thisobj; 2615 int err = 0; 2616 2617 /* don't process if there already was an error */ 2618 if (*dcp->dc_error != 0) 2619 goto out; 2620 2621 /* 2622 * Note: passing the name (dc_ddname) here is optional, but it 2623 * improves performance because we don't need to call 2624 * zap_value_search() to determine the name. 2625 */ 2626 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2627 if (err != 0) 2628 goto out; 2629 2630 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2631 if (dd->dd_myname[0] == '$') { 2632 dsl_dir_rele(dd, FTAG); 2633 goto out; 2634 } 2635 2636 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2637 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2638 2639 /* 2640 * Iterate over all children. 2641 */ 2642 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2643 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2644 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2645 zap_cursor_retrieve(&zc, attr) == 0; 2646 (void) zap_cursor_advance(&zc)) { 2647 ASSERT3U(attr->za_integer_length, ==, 2648 sizeof (uint64_t)); 2649 ASSERT3U(attr->za_num_integers, ==, 1); 2650 2651 dmu_objset_find_ctx_t *child_dcp = 2652 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2653 *child_dcp = *dcp; 2654 child_dcp->dc_ddobj = attr->za_first_integer; 2655 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2656 if (dcp->dc_tq != NULL) 2657 (void) taskq_dispatch(dcp->dc_tq, 2658 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2659 else 2660 dmu_objset_find_dp_impl(child_dcp); 2661 } 2662 zap_cursor_fini(&zc); 2663 } 2664 2665 /* 2666 * Iterate over all snapshots. 2667 */ 2668 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2669 dsl_dataset_t *ds; 2670 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2671 2672 if (err == 0) { 2673 uint64_t snapobj; 2674 2675 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2676 dsl_dataset_rele(ds, FTAG); 2677 2678 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2679 zap_cursor_retrieve(&zc, attr) == 0; 2680 (void) zap_cursor_advance(&zc)) { 2681 ASSERT3U(attr->za_integer_length, ==, 2682 sizeof (uint64_t)); 2683 ASSERT3U(attr->za_num_integers, ==, 1); 2684 2685 err = dsl_dataset_hold_obj(dp, 2686 attr->za_first_integer, FTAG, &ds); 2687 if (err != 0) 2688 break; 2689 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2690 dsl_dataset_rele(ds, FTAG); 2691 if (err != 0) 2692 break; 2693 } 2694 zap_cursor_fini(&zc); 2695 } 2696 } 2697 2698 kmem_free(attr, sizeof (zap_attribute_t)); 2699 2700 if (err != 0) { 2701 dsl_dir_rele(dd, FTAG); 2702 goto out; 2703 } 2704 2705 /* 2706 * Apply to self. 2707 */ 2708 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2709 2710 /* 2711 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2712 * that the dir will remain cached, and we won't have to re-instantiate 2713 * it (which could be expensive due to finding its name via 2714 * zap_value_search()). 2715 */ 2716 dsl_dir_rele(dd, FTAG); 2717 if (err != 0) 2718 goto out; 2719 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2720 dsl_dataset_rele(ds, FTAG); 2721 2722 out: 2723 if (err != 0) { 2724 mutex_enter(dcp->dc_error_lock); 2725 /* only keep first error */ 2726 if (*dcp->dc_error == 0) 2727 *dcp->dc_error = err; 2728 mutex_exit(dcp->dc_error_lock); 2729 } 2730 2731 if (dcp->dc_ddname != NULL) 2732 spa_strfree(dcp->dc_ddname); 2733 kmem_free(dcp, sizeof (*dcp)); 2734 } 2735 2736 static void 2737 dmu_objset_find_dp_cb(void *arg) 2738 { 2739 dmu_objset_find_ctx_t *dcp = arg; 2740 dsl_pool_t *dp = dcp->dc_dp; 2741 2742 /* 2743 * We need to get a pool_config_lock here, as there are several 2744 * assert(pool_config_held) down the stack. Getting a lock via 2745 * dsl_pool_config_enter is risky, as it might be stalled by a 2746 * pending writer. This would deadlock, as the write lock can 2747 * only be granted when our parent thread gives up the lock. 2748 * The _prio interface gives us priority over a pending writer. 2749 */ 2750 dsl_pool_config_enter_prio(dp, FTAG); 2751 2752 dmu_objset_find_dp_impl(dcp); 2753 2754 dsl_pool_config_exit(dp, FTAG); 2755 } 2756 2757 /* 2758 * Find objsets under and including ddobj, call func(ds) on each. 2759 * The order for the enumeration is completely undefined. 2760 * func is called with dsl_pool_config held. 2761 */ 2762 int 2763 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2764 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2765 { 2766 int error = 0; 2767 taskq_t *tq = NULL; 2768 int ntasks; 2769 dmu_objset_find_ctx_t *dcp; 2770 kmutex_t err_lock; 2771 2772 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2773 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2774 dcp->dc_tq = NULL; 2775 dcp->dc_dp = dp; 2776 dcp->dc_ddobj = ddobj; 2777 dcp->dc_ddname = NULL; 2778 dcp->dc_func = func; 2779 dcp->dc_arg = arg; 2780 dcp->dc_flags = flags; 2781 dcp->dc_error_lock = &err_lock; 2782 dcp->dc_error = &error; 2783 2784 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2785 /* 2786 * In case a write lock is held we can't make use of 2787 * parallelism, as down the stack of the worker threads 2788 * the lock is asserted via dsl_pool_config_held. 2789 * In case of a read lock this is solved by getting a read 2790 * lock in each worker thread, which isn't possible in case 2791 * of a writer lock. So we fall back to the synchronous path 2792 * here. 2793 * In the future it might be possible to get some magic into 2794 * dsl_pool_config_held in a way that it returns true for 2795 * the worker threads so that a single lock held from this 2796 * thread suffices. For now, stay single threaded. 2797 */ 2798 dmu_objset_find_dp_impl(dcp); 2799 mutex_destroy(&err_lock); 2800 2801 return (error); 2802 } 2803 2804 ntasks = dmu_find_threads; 2805 if (ntasks == 0) 2806 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2807 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2808 INT_MAX, 0); 2809 if (tq == NULL) { 2810 kmem_free(dcp, sizeof (*dcp)); 2811 mutex_destroy(&err_lock); 2812 2813 return (SET_ERROR(ENOMEM)); 2814 } 2815 dcp->dc_tq = tq; 2816 2817 /* dcp will be freed by task */ 2818 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2819 2820 /* 2821 * PORTING: this code relies on the property of taskq_wait to wait 2822 * until no more tasks are queued and no more tasks are active. As 2823 * we always queue new tasks from within other tasks, task_wait 2824 * reliably waits for the full recursion to finish, even though we 2825 * enqueue new tasks after taskq_wait has been called. 2826 * On platforms other than illumos, taskq_wait may not have this 2827 * property. 2828 */ 2829 taskq_wait(tq); 2830 taskq_destroy(tq); 2831 mutex_destroy(&err_lock); 2832 2833 return (error); 2834 } 2835 2836 /* 2837 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2838 * The dp_config_rwlock must not be held when this is called, and it 2839 * will not be held when the callback is called. 2840 * Therefore this function should only be used when the pool is not changing 2841 * (e.g. in syncing context), or the callback can deal with the possible races. 2842 */ 2843 static int 2844 dmu_objset_find_impl(spa_t *spa, const char *name, 2845 int func(const char *, void *), void *arg, int flags) 2846 { 2847 dsl_dir_t *dd; 2848 dsl_pool_t *dp = spa_get_dsl(spa); 2849 dsl_dataset_t *ds; 2850 zap_cursor_t zc; 2851 zap_attribute_t *attr; 2852 char *child; 2853 uint64_t thisobj; 2854 int err; 2855 2856 dsl_pool_config_enter(dp, FTAG); 2857 2858 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2859 if (err != 0) { 2860 dsl_pool_config_exit(dp, FTAG); 2861 return (err); 2862 } 2863 2864 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2865 if (dd->dd_myname[0] == '$') { 2866 dsl_dir_rele(dd, FTAG); 2867 dsl_pool_config_exit(dp, FTAG); 2868 return (0); 2869 } 2870 2871 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2872 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2873 2874 /* 2875 * Iterate over all children. 2876 */ 2877 if (flags & DS_FIND_CHILDREN) { 2878 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2879 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2880 zap_cursor_retrieve(&zc, attr) == 0; 2881 (void) zap_cursor_advance(&zc)) { 2882 ASSERT3U(attr->za_integer_length, ==, 2883 sizeof (uint64_t)); 2884 ASSERT3U(attr->za_num_integers, ==, 1); 2885 2886 child = kmem_asprintf("%s/%s", name, attr->za_name); 2887 dsl_pool_config_exit(dp, FTAG); 2888 err = dmu_objset_find_impl(spa, child, 2889 func, arg, flags); 2890 dsl_pool_config_enter(dp, FTAG); 2891 kmem_strfree(child); 2892 if (err != 0) 2893 break; 2894 } 2895 zap_cursor_fini(&zc); 2896 2897 if (err != 0) { 2898 dsl_dir_rele(dd, FTAG); 2899 dsl_pool_config_exit(dp, FTAG); 2900 kmem_free(attr, sizeof (zap_attribute_t)); 2901 return (err); 2902 } 2903 } 2904 2905 /* 2906 * Iterate over all snapshots. 2907 */ 2908 if (flags & DS_FIND_SNAPSHOTS) { 2909 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2910 2911 if (err == 0) { 2912 uint64_t snapobj; 2913 2914 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2915 dsl_dataset_rele(ds, FTAG); 2916 2917 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2918 zap_cursor_retrieve(&zc, attr) == 0; 2919 (void) zap_cursor_advance(&zc)) { 2920 ASSERT3U(attr->za_integer_length, ==, 2921 sizeof (uint64_t)); 2922 ASSERT3U(attr->za_num_integers, ==, 1); 2923 2924 child = kmem_asprintf("%s@%s", 2925 name, attr->za_name); 2926 dsl_pool_config_exit(dp, FTAG); 2927 err = func(child, arg); 2928 dsl_pool_config_enter(dp, FTAG); 2929 kmem_strfree(child); 2930 if (err != 0) 2931 break; 2932 } 2933 zap_cursor_fini(&zc); 2934 } 2935 } 2936 2937 dsl_dir_rele(dd, FTAG); 2938 kmem_free(attr, sizeof (zap_attribute_t)); 2939 dsl_pool_config_exit(dp, FTAG); 2940 2941 if (err != 0) 2942 return (err); 2943 2944 /* Apply to self. */ 2945 return (func(name, arg)); 2946 } 2947 2948 /* 2949 * See comment above dmu_objset_find_impl(). 2950 */ 2951 int 2952 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2953 int flags) 2954 { 2955 spa_t *spa; 2956 int error; 2957 2958 error = spa_open(name, &spa, FTAG); 2959 if (error != 0) 2960 return (error); 2961 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2962 spa_close(spa, FTAG); 2963 return (error); 2964 } 2965 2966 boolean_t 2967 dmu_objset_incompatible_encryption_version(objset_t *os) 2968 { 2969 return (dsl_dir_incompatible_encryption_version( 2970 os->os_dsl_dataset->ds_dir)); 2971 } 2972 2973 void 2974 dmu_objset_set_user(objset_t *os, void *user_ptr) 2975 { 2976 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2977 os->os_user_ptr = user_ptr; 2978 } 2979 2980 void * 2981 dmu_objset_get_user(objset_t *os) 2982 { 2983 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2984 return (os->os_user_ptr); 2985 } 2986 2987 /* 2988 * Determine name of filesystem, given name of snapshot. 2989 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 2990 */ 2991 int 2992 dmu_fsname(const char *snapname, char *buf) 2993 { 2994 char *atp = strchr(snapname, '@'); 2995 if (atp == NULL) 2996 return (SET_ERROR(EINVAL)); 2997 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 2998 return (SET_ERROR(ENAMETOOLONG)); 2999 (void) strlcpy(buf, snapname, atp - snapname + 1); 3000 return (0); 3001 } 3002 3003 /* 3004 * Call when we think we're going to write/free space in open context 3005 * to track the amount of dirty data in the open txg, which is also the 3006 * amount of memory that can not be evicted until this txg syncs. 3007 * 3008 * Note that there are two conditions where this can be called from 3009 * syncing context: 3010 * 3011 * [1] When we just created the dataset, in which case we go on with 3012 * updating any accounting of dirty data as usual. 3013 * [2] When we are dirtying MOS data, in which case we only update the 3014 * pool's accounting of dirty data. 3015 */ 3016 void 3017 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3018 { 3019 dsl_dataset_t *ds = os->os_dsl_dataset; 3020 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3021 3022 if (ds != NULL) { 3023 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3024 } 3025 3026 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3027 } 3028 3029 #if defined(_KERNEL) 3030 EXPORT_SYMBOL(dmu_objset_zil); 3031 EXPORT_SYMBOL(dmu_objset_pool); 3032 EXPORT_SYMBOL(dmu_objset_ds); 3033 EXPORT_SYMBOL(dmu_objset_type); 3034 EXPORT_SYMBOL(dmu_objset_name); 3035 EXPORT_SYMBOL(dmu_objset_hold); 3036 EXPORT_SYMBOL(dmu_objset_hold_flags); 3037 EXPORT_SYMBOL(dmu_objset_own); 3038 EXPORT_SYMBOL(dmu_objset_rele); 3039 EXPORT_SYMBOL(dmu_objset_rele_flags); 3040 EXPORT_SYMBOL(dmu_objset_disown); 3041 EXPORT_SYMBOL(dmu_objset_from_ds); 3042 EXPORT_SYMBOL(dmu_objset_create); 3043 EXPORT_SYMBOL(dmu_objset_clone); 3044 EXPORT_SYMBOL(dmu_objset_stats); 3045 EXPORT_SYMBOL(dmu_objset_fast_stat); 3046 EXPORT_SYMBOL(dmu_objset_spa); 3047 EXPORT_SYMBOL(dmu_objset_space); 3048 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3049 EXPORT_SYMBOL(dmu_objset_find); 3050 EXPORT_SYMBOL(dmu_objset_byteswap); 3051 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3052 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3053 EXPORT_SYMBOL(dmu_objset_dnodesize); 3054 3055 EXPORT_SYMBOL(dmu_objset_sync); 3056 EXPORT_SYMBOL(dmu_objset_is_dirty); 3057 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3058 EXPORT_SYMBOL(dmu_objset_create_impl); 3059 EXPORT_SYMBOL(dmu_objset_open_impl); 3060 EXPORT_SYMBOL(dmu_objset_evict); 3061 EXPORT_SYMBOL(dmu_objset_register_type); 3062 EXPORT_SYMBOL(dmu_objset_sync_done); 3063 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3064 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3065 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3066 EXPORT_SYMBOL(dmu_objset_userspace_present); 3067 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3068 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3069 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3070 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3071 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3072 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3073 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3074 #endif 3075