1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 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 */ 36 37 /* Portions Copyright 2010 Robert Milkowski */ 38 39 #include <sys/cred.h> 40 #include <sys/zfs_context.h> 41 #include <sys/dmu_objset.h> 42 #include <sys/dsl_dir.h> 43 #include <sys/dsl_dataset.h> 44 #include <sys/dsl_prop.h> 45 #include <sys/dsl_pool.h> 46 #include <sys/dsl_synctask.h> 47 #include <sys/dsl_deleg.h> 48 #include <sys/dnode.h> 49 #include <sys/dbuf.h> 50 #include <sys/zvol.h> 51 #include <sys/dmu_tx.h> 52 #include <sys/zap.h> 53 #include <sys/zil.h> 54 #include <sys/dmu_impl.h> 55 #include <sys/zfs_ioctl.h> 56 #include <sys/sa.h> 57 #include <sys/zfs_onexit.h> 58 #include <sys/dsl_destroy.h> 59 #include <sys/vdev.h> 60 #include <sys/zfeature.h> 61 #include <sys/policy.h> 62 #include <sys/spa_impl.h> 63 #include <sys/dmu_recv.h> 64 #include <sys/zfs_project.h> 65 #include "zfs_namecheck.h" 66 67 /* 68 * Needed to close a window in dnode_move() that allows the objset to be freed 69 * before it can be safely accessed. 70 */ 71 krwlock_t os_lock; 72 73 /* 74 * Tunable to overwrite the maximum number of threads for the parallelization 75 * of dmu_objset_find_dp, needed to speed up the import of pools with many 76 * datasets. 77 * Default is 4 times the number of leaf vdevs. 78 */ 79 int dmu_find_threads = 0; 80 81 /* 82 * Backfill lower metadnode objects after this many have been freed. 83 * Backfilling negatively impacts object creation rates, so only do it 84 * if there are enough holes to fill. 85 */ 86 int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 87 88 static char *upgrade_tag = "upgrade_tag"; 89 90 static void dmu_objset_find_dp_cb(void *arg); 91 92 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 93 static void dmu_objset_upgrade_stop(objset_t *os); 94 95 void 96 dmu_objset_init(void) 97 { 98 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 99 } 100 101 void 102 dmu_objset_fini(void) 103 { 104 rw_destroy(&os_lock); 105 } 106 107 spa_t * 108 dmu_objset_spa(objset_t *os) 109 { 110 return (os->os_spa); 111 } 112 113 zilog_t * 114 dmu_objset_zil(objset_t *os) 115 { 116 return (os->os_zil); 117 } 118 119 dsl_pool_t * 120 dmu_objset_pool(objset_t *os) 121 { 122 dsl_dataset_t *ds; 123 124 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 125 return (ds->ds_dir->dd_pool); 126 else 127 return (spa_get_dsl(os->os_spa)); 128 } 129 130 dsl_dataset_t * 131 dmu_objset_ds(objset_t *os) 132 { 133 return (os->os_dsl_dataset); 134 } 135 136 dmu_objset_type_t 137 dmu_objset_type(objset_t *os) 138 { 139 return (os->os_phys->os_type); 140 } 141 142 void 143 dmu_objset_name(objset_t *os, char *buf) 144 { 145 dsl_dataset_name(os->os_dsl_dataset, buf); 146 } 147 148 uint64_t 149 dmu_objset_id(objset_t *os) 150 { 151 dsl_dataset_t *ds = os->os_dsl_dataset; 152 153 return (ds ? ds->ds_object : 0); 154 } 155 156 uint64_t 157 dmu_objset_dnodesize(objset_t *os) 158 { 159 return (os->os_dnodesize); 160 } 161 162 zfs_sync_type_t 163 dmu_objset_syncprop(objset_t *os) 164 { 165 return (os->os_sync); 166 } 167 168 zfs_logbias_op_t 169 dmu_objset_logbias(objset_t *os) 170 { 171 return (os->os_logbias); 172 } 173 174 static void 175 checksum_changed_cb(void *arg, uint64_t newval) 176 { 177 objset_t *os = arg; 178 179 /* 180 * Inheritance should have been done by now. 181 */ 182 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 183 184 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 185 } 186 187 static void 188 compression_changed_cb(void *arg, uint64_t newval) 189 { 190 objset_t *os = arg; 191 192 /* 193 * Inheritance and range checking should have been done by now. 194 */ 195 ASSERT(newval != ZIO_COMPRESS_INHERIT); 196 197 os->os_compress = zio_compress_select(os->os_spa, 198 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 199 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 200 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 201 } 202 203 static void 204 copies_changed_cb(void *arg, uint64_t newval) 205 { 206 objset_t *os = arg; 207 208 /* 209 * Inheritance and range checking should have been done by now. 210 */ 211 ASSERT(newval > 0); 212 ASSERT(newval <= spa_max_replication(os->os_spa)); 213 214 os->os_copies = newval; 215 } 216 217 static void 218 dedup_changed_cb(void *arg, uint64_t newval) 219 { 220 objset_t *os = arg; 221 spa_t *spa = os->os_spa; 222 enum zio_checksum checksum; 223 224 /* 225 * Inheritance should have been done by now. 226 */ 227 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 228 229 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 230 231 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 232 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 233 } 234 235 static void 236 primary_cache_changed_cb(void *arg, uint64_t newval) 237 { 238 objset_t *os = arg; 239 240 /* 241 * Inheritance and range checking should have been done by now. 242 */ 243 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 244 newval == ZFS_CACHE_METADATA); 245 246 os->os_primary_cache = newval; 247 } 248 249 static void 250 secondary_cache_changed_cb(void *arg, uint64_t newval) 251 { 252 objset_t *os = arg; 253 254 /* 255 * Inheritance and range checking should have been done by now. 256 */ 257 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 258 newval == ZFS_CACHE_METADATA); 259 260 os->os_secondary_cache = newval; 261 } 262 263 static void 264 sync_changed_cb(void *arg, uint64_t newval) 265 { 266 objset_t *os = arg; 267 268 /* 269 * Inheritance and range checking should have been done by now. 270 */ 271 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 272 newval == ZFS_SYNC_DISABLED); 273 274 os->os_sync = newval; 275 if (os->os_zil) 276 zil_set_sync(os->os_zil, newval); 277 } 278 279 static void 280 redundant_metadata_changed_cb(void *arg, uint64_t newval) 281 { 282 objset_t *os = arg; 283 284 /* 285 * Inheritance and range checking should have been done by now. 286 */ 287 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 288 newval == ZFS_REDUNDANT_METADATA_MOST); 289 290 os->os_redundant_metadata = newval; 291 } 292 293 static void 294 dnodesize_changed_cb(void *arg, uint64_t newval) 295 { 296 objset_t *os = arg; 297 298 switch (newval) { 299 case ZFS_DNSIZE_LEGACY: 300 os->os_dnodesize = DNODE_MIN_SIZE; 301 break; 302 case ZFS_DNSIZE_AUTO: 303 /* 304 * Choose a dnode size that will work well for most 305 * workloads if the user specified "auto". Future code 306 * improvements could dynamically select a dnode size 307 * based on observed workload patterns. 308 */ 309 os->os_dnodesize = DNODE_MIN_SIZE * 2; 310 break; 311 case ZFS_DNSIZE_1K: 312 case ZFS_DNSIZE_2K: 313 case ZFS_DNSIZE_4K: 314 case ZFS_DNSIZE_8K: 315 case ZFS_DNSIZE_16K: 316 os->os_dnodesize = newval; 317 break; 318 } 319 } 320 321 static void 322 smallblk_changed_cb(void *arg, uint64_t newval) 323 { 324 objset_t *os = arg; 325 326 /* 327 * Inheritance and range checking should have been done by now. 328 */ 329 ASSERT(newval <= SPA_MAXBLOCKSIZE); 330 ASSERT(ISP2(newval)); 331 332 os->os_zpl_special_smallblock = newval; 333 } 334 335 static void 336 logbias_changed_cb(void *arg, uint64_t newval) 337 { 338 objset_t *os = arg; 339 340 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 341 newval == ZFS_LOGBIAS_THROUGHPUT); 342 os->os_logbias = newval; 343 if (os->os_zil) 344 zil_set_logbias(os->os_zil, newval); 345 } 346 347 static void 348 recordsize_changed_cb(void *arg, uint64_t newval) 349 { 350 objset_t *os = arg; 351 352 os->os_recordsize = newval; 353 } 354 355 void 356 dmu_objset_byteswap(void *buf, size_t size) 357 { 358 objset_phys_t *osp = buf; 359 360 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 361 size == sizeof (objset_phys_t)); 362 dnode_byteswap(&osp->os_meta_dnode); 363 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 364 osp->os_type = BSWAP_64(osp->os_type); 365 osp->os_flags = BSWAP_64(osp->os_flags); 366 if (size >= OBJSET_PHYS_SIZE_V2) { 367 dnode_byteswap(&osp->os_userused_dnode); 368 dnode_byteswap(&osp->os_groupused_dnode); 369 if (size >= sizeof (objset_phys_t)) 370 dnode_byteswap(&osp->os_projectused_dnode); 371 } 372 } 373 374 /* 375 * The hash is a CRC-based hash of the objset_t pointer and the object number. 376 */ 377 static uint64_t 378 dnode_hash(const objset_t *os, uint64_t obj) 379 { 380 uintptr_t osv = (uintptr_t)os; 381 uint64_t crc = -1ULL; 382 383 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 384 /* 385 * The low 6 bits of the pointer don't have much entropy, because 386 * the objset_t is larger than 2^6 bytes long. 387 */ 388 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF]; 389 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF]; 390 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF]; 391 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF]; 392 393 crc ^= (osv>>14) ^ (obj>>24); 394 395 return (crc); 396 } 397 398 static unsigned int 399 dnode_multilist_index_func(multilist_t *ml, void *obj) 400 { 401 dnode_t *dn = obj; 402 return (dnode_hash(dn->dn_objset, dn->dn_object) % 403 multilist_get_num_sublists(ml)); 404 } 405 406 /* 407 * Instantiates the objset_t in-memory structure corresponding to the 408 * objset_phys_t that's pointed to by the specified blkptr_t. 409 */ 410 int 411 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 412 objset_t **osp) 413 { 414 objset_t *os; 415 int i, err; 416 417 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 418 ASSERT(!BP_IS_REDACTED(bp)); 419 420 /* 421 * We need the pool config lock to get properties. 422 */ 423 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 424 425 /* 426 * The $ORIGIN dataset (if it exists) doesn't have an associated 427 * objset, so there's no reason to open it. The $ORIGIN dataset 428 * will not exist on pools older than SPA_VERSION_ORIGIN. 429 */ 430 if (ds != NULL && spa_get_dsl(spa) != NULL && 431 spa_get_dsl(spa)->dp_origin_snap != NULL) { 432 ASSERT3P(ds->ds_dir, !=, 433 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 434 } 435 436 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 437 os->os_dsl_dataset = ds; 438 os->os_spa = spa; 439 os->os_rootbp = bp; 440 if (!BP_IS_HOLE(os->os_rootbp)) { 441 arc_flags_t aflags = ARC_FLAG_WAIT; 442 zbookmark_phys_t zb; 443 int size; 444 enum zio_flag zio_flags = ZIO_FLAG_CANFAIL; 445 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 446 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 447 448 if (DMU_OS_IS_L2CACHEABLE(os)) 449 aflags |= ARC_FLAG_L2CACHE; 450 451 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 452 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 453 ASSERT(BP_IS_AUTHENTICATED(bp)); 454 zio_flags |= ZIO_FLAG_RAW; 455 } 456 457 dprintf_bp(os->os_rootbp, "reading %s", ""); 458 err = arc_read(NULL, spa, os->os_rootbp, 459 arc_getbuf_func, &os->os_phys_buf, 460 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 461 if (err != 0) { 462 kmem_free(os, sizeof (objset_t)); 463 /* convert checksum errors into IO errors */ 464 if (err == ECKSUM) 465 err = SET_ERROR(EIO); 466 return (err); 467 } 468 469 if (spa_version(spa) < SPA_VERSION_USERSPACE) 470 size = OBJSET_PHYS_SIZE_V1; 471 else if (!spa_feature_is_enabled(spa, 472 SPA_FEATURE_PROJECT_QUOTA)) 473 size = OBJSET_PHYS_SIZE_V2; 474 else 475 size = sizeof (objset_phys_t); 476 477 /* Increase the blocksize if we are permitted. */ 478 if (arc_buf_size(os->os_phys_buf) < size) { 479 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 480 ARC_BUFC_METADATA, size); 481 bzero(buf->b_data, size); 482 bcopy(os->os_phys_buf->b_data, buf->b_data, 483 arc_buf_size(os->os_phys_buf)); 484 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 485 os->os_phys_buf = buf; 486 } 487 488 os->os_phys = os->os_phys_buf->b_data; 489 os->os_flags = os->os_phys->os_flags; 490 } else { 491 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 492 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 493 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 494 ARC_BUFC_METADATA, size); 495 os->os_phys = os->os_phys_buf->b_data; 496 bzero(os->os_phys, size); 497 } 498 /* 499 * These properties will be filled in by the logic in zfs_get_zplprop() 500 * when they are queried for the first time. 501 */ 502 os->os_version = OBJSET_PROP_UNINITIALIZED; 503 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 504 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 505 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 506 507 /* 508 * Note: the changed_cb will be called once before the register 509 * func returns, thus changing the checksum/compression from the 510 * default (fletcher2/off). Snapshots don't need to know about 511 * checksum/compression/copies. 512 */ 513 if (ds != NULL) { 514 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 515 516 err = dsl_prop_register(ds, 517 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 518 primary_cache_changed_cb, os); 519 if (err == 0) { 520 err = dsl_prop_register(ds, 521 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 522 secondary_cache_changed_cb, os); 523 } 524 if (!ds->ds_is_snapshot) { 525 if (err == 0) { 526 err = dsl_prop_register(ds, 527 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 528 checksum_changed_cb, os); 529 } 530 if (err == 0) { 531 err = dsl_prop_register(ds, 532 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 533 compression_changed_cb, os); 534 } 535 if (err == 0) { 536 err = dsl_prop_register(ds, 537 zfs_prop_to_name(ZFS_PROP_COPIES), 538 copies_changed_cb, os); 539 } 540 if (err == 0) { 541 err = dsl_prop_register(ds, 542 zfs_prop_to_name(ZFS_PROP_DEDUP), 543 dedup_changed_cb, os); 544 } 545 if (err == 0) { 546 err = dsl_prop_register(ds, 547 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 548 logbias_changed_cb, os); 549 } 550 if (err == 0) { 551 err = dsl_prop_register(ds, 552 zfs_prop_to_name(ZFS_PROP_SYNC), 553 sync_changed_cb, os); 554 } 555 if (err == 0) { 556 err = dsl_prop_register(ds, 557 zfs_prop_to_name( 558 ZFS_PROP_REDUNDANT_METADATA), 559 redundant_metadata_changed_cb, os); 560 } 561 if (err == 0) { 562 err = dsl_prop_register(ds, 563 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 564 recordsize_changed_cb, os); 565 } 566 if (err == 0) { 567 err = dsl_prop_register(ds, 568 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 569 dnodesize_changed_cb, os); 570 } 571 if (err == 0) { 572 err = dsl_prop_register(ds, 573 zfs_prop_to_name( 574 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 575 smallblk_changed_cb, os); 576 } 577 } 578 if (err != 0) { 579 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 580 kmem_free(os, sizeof (objset_t)); 581 return (err); 582 } 583 } else { 584 /* It's the meta-objset. */ 585 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 586 os->os_compress = ZIO_COMPRESS_ON; 587 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 588 os->os_encrypted = B_FALSE; 589 os->os_copies = spa_max_replication(spa); 590 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 591 os->os_dedup_verify = B_FALSE; 592 os->os_logbias = ZFS_LOGBIAS_LATENCY; 593 os->os_sync = ZFS_SYNC_STANDARD; 594 os->os_primary_cache = ZFS_CACHE_ALL; 595 os->os_secondary_cache = ZFS_CACHE_ALL; 596 os->os_dnodesize = DNODE_MIN_SIZE; 597 } 598 599 if (ds == NULL || !ds->ds_is_snapshot) 600 os->os_zil_header = os->os_phys->os_zil_header; 601 os->os_zil = zil_alloc(os, &os->os_zil_header); 602 603 for (i = 0; i < TXG_SIZE; i++) { 604 os->os_dirty_dnodes[i] = multilist_create(sizeof (dnode_t), 605 offsetof(dnode_t, dn_dirty_link[i]), 606 dnode_multilist_index_func); 607 } 608 list_create(&os->os_dnodes, sizeof (dnode_t), 609 offsetof(dnode_t, dn_link)); 610 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 611 offsetof(dmu_buf_impl_t, db_link)); 612 613 list_link_init(&os->os_evicting_node); 614 615 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 616 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 617 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 618 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 619 os->os_obj_next_percpu_len = boot_ncpus; 620 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 621 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 622 623 dnode_special_open(os, &os->os_phys->os_meta_dnode, 624 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 625 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 626 dnode_special_open(os, &os->os_phys->os_userused_dnode, 627 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 628 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 629 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 630 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 631 dnode_special_open(os, 632 &os->os_phys->os_projectused_dnode, 633 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 634 } 635 636 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 637 638 *osp = os; 639 return (0); 640 } 641 642 int 643 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 644 { 645 int err = 0; 646 647 /* 648 * We need the pool_config lock to manipulate the dsl_dataset_t. 649 * Even if the dataset is long-held, we need the pool_config lock 650 * to open the objset, as it needs to get properties. 651 */ 652 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 653 654 mutex_enter(&ds->ds_opening_lock); 655 if (ds->ds_objset == NULL) { 656 objset_t *os; 657 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 658 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 659 ds, dsl_dataset_get_blkptr(ds), &os); 660 rrw_exit(&ds->ds_bp_rwlock, FTAG); 661 662 if (err == 0) { 663 mutex_enter(&ds->ds_lock); 664 ASSERT(ds->ds_objset == NULL); 665 ds->ds_objset = os; 666 mutex_exit(&ds->ds_lock); 667 } 668 } 669 *osp = ds->ds_objset; 670 mutex_exit(&ds->ds_opening_lock); 671 return (err); 672 } 673 674 /* 675 * Holds the pool while the objset is held. Therefore only one objset 676 * can be held at a time. 677 */ 678 int 679 dmu_objset_hold_flags(const char *name, boolean_t decrypt, void *tag, 680 objset_t **osp) 681 { 682 dsl_pool_t *dp; 683 dsl_dataset_t *ds; 684 int err; 685 ds_hold_flags_t flags; 686 687 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 688 err = dsl_pool_hold(name, tag, &dp); 689 if (err != 0) 690 return (err); 691 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 692 if (err != 0) { 693 dsl_pool_rele(dp, tag); 694 return (err); 695 } 696 697 err = dmu_objset_from_ds(ds, osp); 698 if (err != 0) { 699 dsl_dataset_rele(ds, tag); 700 dsl_pool_rele(dp, tag); 701 } 702 703 return (err); 704 } 705 706 int 707 dmu_objset_hold(const char *name, void *tag, objset_t **osp) 708 { 709 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 710 } 711 712 static int 713 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 714 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 715 { 716 int err; 717 718 err = dmu_objset_from_ds(ds, osp); 719 if (err != 0) { 720 return (err); 721 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 722 return (SET_ERROR(EINVAL)); 723 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 724 return (SET_ERROR(EROFS)); 725 } else if (!readonly && decrypt && 726 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 727 return (SET_ERROR(EROFS)); 728 } 729 730 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 731 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 732 zbookmark_phys_t zb; 733 734 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 735 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 736 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 737 &zb, B_FALSE); 738 if (err != 0) 739 return (err); 740 741 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 742 } 743 744 return (0); 745 } 746 747 /* 748 * dsl_pool must not be held when this is called. 749 * Upon successful return, there will be a longhold on the dataset, 750 * and the dsl_pool will not be held. 751 */ 752 int 753 dmu_objset_own(const char *name, dmu_objset_type_t type, 754 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 755 { 756 dsl_pool_t *dp; 757 dsl_dataset_t *ds; 758 int err; 759 ds_hold_flags_t flags; 760 761 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 762 err = dsl_pool_hold(name, FTAG, &dp); 763 if (err != 0) 764 return (err); 765 err = dsl_dataset_own(dp, name, flags, tag, &ds); 766 if (err != 0) { 767 dsl_pool_rele(dp, FTAG); 768 return (err); 769 } 770 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 771 if (err != 0) { 772 dsl_dataset_disown(ds, flags, tag); 773 dsl_pool_rele(dp, FTAG); 774 return (err); 775 } 776 777 /* 778 * User accounting requires the dataset to be decrypted and rw. 779 * We also don't begin user accounting during claiming to help 780 * speed up pool import times and to keep this txg reserved 781 * completely for recovery work. 782 */ 783 if (!readonly && !dp->dp_spa->spa_claiming && 784 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 785 if (dmu_objset_userobjspace_upgradable(*osp) || 786 dmu_objset_projectquota_upgradable(*osp)) { 787 dmu_objset_id_quota_upgrade(*osp); 788 } else if (dmu_objset_userused_enabled(*osp)) { 789 dmu_objset_userspace_upgrade(*osp); 790 } 791 } 792 793 dsl_pool_rele(dp, FTAG); 794 return (0); 795 } 796 797 int 798 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 799 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 800 { 801 dsl_dataset_t *ds; 802 int err; 803 ds_hold_flags_t flags; 804 805 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 806 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 807 if (err != 0) 808 return (err); 809 810 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 811 if (err != 0) { 812 dsl_dataset_disown(ds, flags, tag); 813 return (err); 814 } 815 816 return (0); 817 } 818 819 void 820 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, void *tag) 821 { 822 ds_hold_flags_t flags; 823 dsl_pool_t *dp = dmu_objset_pool(os); 824 825 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 826 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 827 dsl_pool_rele(dp, tag); 828 } 829 830 void 831 dmu_objset_rele(objset_t *os, void *tag) 832 { 833 dmu_objset_rele_flags(os, B_FALSE, tag); 834 } 835 836 /* 837 * When we are called, os MUST refer to an objset associated with a dataset 838 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 839 * == tag. We will then release and reacquire ownership of the dataset while 840 * holding the pool config_rwlock to avoid intervening namespace or ownership 841 * changes may occur. 842 * 843 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 844 * release the hold on its dataset and acquire a new one on the dataset of the 845 * same name so that it can be partially torn down and reconstructed. 846 */ 847 void 848 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 849 boolean_t decrypt, void *tag) 850 { 851 dsl_pool_t *dp; 852 char name[ZFS_MAX_DATASET_NAME_LEN]; 853 ds_hold_flags_t flags; 854 855 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 856 VERIFY3P(ds, !=, NULL); 857 VERIFY3P(ds->ds_owner, ==, tag); 858 VERIFY(dsl_dataset_long_held(ds)); 859 860 dsl_dataset_name(ds, name); 861 dp = ds->ds_dir->dd_pool; 862 dsl_pool_config_enter(dp, FTAG); 863 dsl_dataset_disown(ds, flags, tag); 864 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 865 dsl_pool_config_exit(dp, FTAG); 866 } 867 868 void 869 dmu_objset_disown(objset_t *os, boolean_t decrypt, void *tag) 870 { 871 ds_hold_flags_t flags; 872 873 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 874 /* 875 * Stop upgrading thread 876 */ 877 dmu_objset_upgrade_stop(os); 878 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 879 } 880 881 void 882 dmu_objset_evict_dbufs(objset_t *os) 883 { 884 dnode_t *dn_marker; 885 dnode_t *dn; 886 887 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 888 889 mutex_enter(&os->os_lock); 890 dn = list_head(&os->os_dnodes); 891 while (dn != NULL) { 892 /* 893 * Skip dnodes without holds. We have to do this dance 894 * because dnode_add_ref() only works if there is already a 895 * hold. If the dnode has no holds, then it has no dbufs. 896 */ 897 if (dnode_add_ref(dn, FTAG)) { 898 list_insert_after(&os->os_dnodes, dn, dn_marker); 899 mutex_exit(&os->os_lock); 900 901 dnode_evict_dbufs(dn); 902 dnode_rele(dn, FTAG); 903 904 mutex_enter(&os->os_lock); 905 dn = list_next(&os->os_dnodes, dn_marker); 906 list_remove(&os->os_dnodes, dn_marker); 907 } else { 908 dn = list_next(&os->os_dnodes, dn); 909 } 910 } 911 mutex_exit(&os->os_lock); 912 913 kmem_free(dn_marker, sizeof (dnode_t)); 914 915 if (DMU_USERUSED_DNODE(os) != NULL) { 916 if (DMU_PROJECTUSED_DNODE(os) != NULL) 917 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 918 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 919 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 920 } 921 dnode_evict_dbufs(DMU_META_DNODE(os)); 922 } 923 924 /* 925 * Objset eviction processing is split into into two pieces. 926 * The first marks the objset as evicting, evicts any dbufs that 927 * have a refcount of zero, and then queues up the objset for the 928 * second phase of eviction. Once os->os_dnodes has been cleared by 929 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 930 * The second phase closes the special dnodes, dequeues the objset from 931 * the list of those undergoing eviction, and finally frees the objset. 932 * 933 * NOTE: Due to asynchronous eviction processing (invocation of 934 * dnode_buf_pageout()), it is possible for the meta dnode for the 935 * objset to have no holds even though os->os_dnodes is not empty. 936 */ 937 void 938 dmu_objset_evict(objset_t *os) 939 { 940 dsl_dataset_t *ds = os->os_dsl_dataset; 941 942 for (int t = 0; t < TXG_SIZE; t++) 943 ASSERT(!dmu_objset_is_dirty(os, t)); 944 945 if (ds) 946 dsl_prop_unregister_all(ds, os); 947 948 if (os->os_sa) 949 sa_tear_down(os); 950 951 dmu_objset_evict_dbufs(os); 952 953 mutex_enter(&os->os_lock); 954 spa_evicting_os_register(os->os_spa, os); 955 if (list_is_empty(&os->os_dnodes)) { 956 mutex_exit(&os->os_lock); 957 dmu_objset_evict_done(os); 958 } else { 959 mutex_exit(&os->os_lock); 960 } 961 962 963 } 964 965 void 966 dmu_objset_evict_done(objset_t *os) 967 { 968 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 969 970 dnode_special_close(&os->os_meta_dnode); 971 if (DMU_USERUSED_DNODE(os)) { 972 if (DMU_PROJECTUSED_DNODE(os)) 973 dnode_special_close(&os->os_projectused_dnode); 974 dnode_special_close(&os->os_userused_dnode); 975 dnode_special_close(&os->os_groupused_dnode); 976 } 977 zil_free(os->os_zil); 978 979 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 980 981 /* 982 * This is a barrier to prevent the objset from going away in 983 * dnode_move() until we can safely ensure that the objset is still in 984 * use. We consider the objset valid before the barrier and invalid 985 * after the barrier. 986 */ 987 rw_enter(&os_lock, RW_READER); 988 rw_exit(&os_lock); 989 990 kmem_free(os->os_obj_next_percpu, 991 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 992 993 mutex_destroy(&os->os_lock); 994 mutex_destroy(&os->os_userused_lock); 995 mutex_destroy(&os->os_obj_lock); 996 mutex_destroy(&os->os_user_ptr_lock); 997 mutex_destroy(&os->os_upgrade_lock); 998 for (int i = 0; i < TXG_SIZE; i++) { 999 multilist_destroy(os->os_dirty_dnodes[i]); 1000 } 1001 spa_evicting_os_deregister(os->os_spa, os); 1002 kmem_free(os, sizeof (objset_t)); 1003 } 1004 1005 inode_timespec_t 1006 dmu_objset_snap_cmtime(objset_t *os) 1007 { 1008 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1009 } 1010 1011 objset_t * 1012 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1013 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1014 { 1015 objset_t *os; 1016 dnode_t *mdn; 1017 1018 ASSERT(dmu_tx_is_syncing(tx)); 1019 1020 if (blksz == 0) 1021 blksz = DNODE_BLOCK_SIZE; 1022 if (ibs == 0) 1023 ibs = DN_MAX_INDBLKSHIFT; 1024 1025 if (ds != NULL) 1026 VERIFY0(dmu_objset_from_ds(ds, &os)); 1027 else 1028 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1029 1030 mdn = DMU_META_DNODE(os); 1031 1032 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1033 DNODE_MIN_SLOTS, tx); 1034 1035 /* 1036 * We don't want to have to increase the meta-dnode's nlevels 1037 * later, because then we could do it in quiescing context while 1038 * we are also accessing it in open context. 1039 * 1040 * This precaution is not necessary for the MOS (ds == NULL), 1041 * because the MOS is only updated in syncing context. 1042 * This is most fortunate: the MOS is the only objset that 1043 * needs to be synced multiple times as spa_sync() iterates 1044 * to convergence, so minimizing its dn_nlevels matters. 1045 */ 1046 if (ds != NULL) { 1047 if (levels == 0) { 1048 levels = 1; 1049 1050 /* 1051 * Determine the number of levels necessary for the 1052 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1053 * that in order to ensure that we do not overflow 1054 * 64 bits, there has to be a nlevels that gives us a 1055 * number of blocks > DN_MAX_OBJECT but < 2^64. 1056 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1057 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1058 * (16). 1059 */ 1060 while ((uint64_t)mdn->dn_nblkptr << 1061 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1062 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1063 DN_MAX_OBJECT) 1064 levels++; 1065 } 1066 1067 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1068 mdn->dn_nlevels = levels; 1069 } 1070 1071 ASSERT(type != DMU_OST_NONE); 1072 ASSERT(type != DMU_OST_ANY); 1073 ASSERT(type < DMU_OST_NUMTYPES); 1074 os->os_phys->os_type = type; 1075 1076 /* 1077 * Enable user accounting if it is enabled and this is not an 1078 * encrypted receive. 1079 */ 1080 if (dmu_objset_userused_enabled(os) && 1081 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1082 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1083 if (dmu_objset_userobjused_enabled(os)) { 1084 ds->ds_feature_activation[ 1085 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1086 os->os_phys->os_flags |= 1087 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1088 } 1089 if (dmu_objset_projectquota_enabled(os)) { 1090 ds->ds_feature_activation[ 1091 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1092 os->os_phys->os_flags |= 1093 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1094 } 1095 os->os_flags = os->os_phys->os_flags; 1096 } 1097 1098 dsl_dataset_dirty(ds, tx); 1099 1100 return (os); 1101 } 1102 1103 /* called from dsl for meta-objset */ 1104 objset_t * 1105 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1106 dmu_objset_type_t type, dmu_tx_t *tx) 1107 { 1108 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1109 } 1110 1111 typedef struct dmu_objset_create_arg { 1112 const char *doca_name; 1113 cred_t *doca_cred; 1114 proc_t *doca_proc; 1115 void (*doca_userfunc)(objset_t *os, void *arg, 1116 cred_t *cr, dmu_tx_t *tx); 1117 void *doca_userarg; 1118 dmu_objset_type_t doca_type; 1119 uint64_t doca_flags; 1120 dsl_crypto_params_t *doca_dcp; 1121 } dmu_objset_create_arg_t; 1122 1123 /*ARGSUSED*/ 1124 static int 1125 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1126 { 1127 dmu_objset_create_arg_t *doca = arg; 1128 dsl_pool_t *dp = dmu_tx_pool(tx); 1129 dsl_dir_t *pdd; 1130 dsl_dataset_t *parentds; 1131 objset_t *parentos; 1132 const char *tail; 1133 int error; 1134 1135 if (strchr(doca->doca_name, '@') != NULL) 1136 return (SET_ERROR(EINVAL)); 1137 1138 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1139 return (SET_ERROR(ENAMETOOLONG)); 1140 1141 if (dataset_nestcheck(doca->doca_name) != 0) 1142 return (SET_ERROR(ENAMETOOLONG)); 1143 1144 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1145 if (error != 0) 1146 return (error); 1147 if (tail == NULL) { 1148 dsl_dir_rele(pdd, FTAG); 1149 return (SET_ERROR(EEXIST)); 1150 } 1151 1152 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1153 if (error != 0) { 1154 dsl_dir_rele(pdd, FTAG); 1155 return (error); 1156 } 1157 1158 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1159 doca->doca_cred, doca->doca_proc); 1160 if (error != 0) { 1161 dsl_dir_rele(pdd, FTAG); 1162 return (error); 1163 } 1164 1165 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1166 error = dsl_dataset_hold_obj(pdd->dd_pool, 1167 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1168 if (error != 0) { 1169 dsl_dir_rele(pdd, FTAG); 1170 return (error); 1171 } 1172 error = dmu_objset_from_ds(parentds, &parentos); 1173 if (error != 0) { 1174 dsl_dataset_rele(parentds, FTAG); 1175 dsl_dir_rele(pdd, FTAG); 1176 return (error); 1177 } 1178 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1179 dsl_dataset_rele(parentds, FTAG); 1180 dsl_dir_rele(pdd, FTAG); 1181 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1182 } 1183 dsl_dataset_rele(parentds, FTAG); 1184 dsl_dir_rele(pdd, FTAG); 1185 1186 return (error); 1187 } 1188 1189 static void 1190 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1191 { 1192 dmu_objset_create_arg_t *doca = arg; 1193 dsl_pool_t *dp = dmu_tx_pool(tx); 1194 spa_t *spa = dp->dp_spa; 1195 dsl_dir_t *pdd; 1196 const char *tail; 1197 dsl_dataset_t *ds; 1198 uint64_t obj; 1199 blkptr_t *bp; 1200 objset_t *os; 1201 zio_t *rzio; 1202 1203 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1204 1205 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1206 doca->doca_cred, doca->doca_dcp, tx); 1207 1208 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1209 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1210 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1211 bp = dsl_dataset_get_blkptr(ds); 1212 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1213 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1214 1215 if (doca->doca_userfunc != NULL) { 1216 doca->doca_userfunc(os, doca->doca_userarg, 1217 doca->doca_cred, tx); 1218 } 1219 1220 /* 1221 * The doca_userfunc() may write out some data that needs to be 1222 * encrypted if the dataset is encrypted (specifically the root 1223 * directory). This data must be written out before the encryption 1224 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1225 * I/O to occur immediately by invoking the relevant sections of 1226 * dsl_pool_sync(). 1227 */ 1228 if (os->os_encrypted) { 1229 dsl_dataset_t *tmpds = NULL; 1230 boolean_t need_sync_done = B_FALSE; 1231 1232 mutex_enter(&ds->ds_lock); 1233 ds->ds_owner = FTAG; 1234 mutex_exit(&ds->ds_lock); 1235 1236 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1237 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1238 tx->tx_txg); 1239 if (tmpds != NULL) { 1240 dsl_dataset_sync(ds, rzio, tx); 1241 need_sync_done = B_TRUE; 1242 } 1243 VERIFY0(zio_wait(rzio)); 1244 1245 dmu_objset_sync_done(os, tx); 1246 taskq_wait(dp->dp_sync_taskq); 1247 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1248 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1249 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1250 } 1251 1252 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1253 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1254 tx->tx_txg); 1255 if (tmpds != NULL) { 1256 dmu_buf_rele(ds->ds_dbuf, ds); 1257 dsl_dataset_sync(ds, rzio, tx); 1258 } 1259 VERIFY0(zio_wait(rzio)); 1260 1261 if (need_sync_done) { 1262 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1263 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1264 dsl_dataset_sync_done(ds, tx); 1265 } 1266 1267 mutex_enter(&ds->ds_lock); 1268 ds->ds_owner = NULL; 1269 mutex_exit(&ds->ds_lock); 1270 } 1271 1272 spa_history_log_internal_ds(ds, "create", tx, " "); 1273 1274 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1275 dsl_dir_rele(pdd, FTAG); 1276 } 1277 1278 int 1279 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1280 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1281 { 1282 dmu_objset_create_arg_t doca; 1283 dsl_crypto_params_t tmp_dcp = { 0 }; 1284 1285 doca.doca_name = name; 1286 doca.doca_cred = CRED(); 1287 doca.doca_proc = curproc; 1288 doca.doca_flags = flags; 1289 doca.doca_userfunc = func; 1290 doca.doca_userarg = arg; 1291 doca.doca_type = type; 1292 1293 /* 1294 * Some callers (mostly for testing) do not provide a dcp on their 1295 * own but various code inside the sync task will require it to be 1296 * allocated. Rather than adding NULL checks throughout this code 1297 * or adding dummy dcp's to all of the callers we simply create a 1298 * dummy one here and use that. This zero dcp will have the same 1299 * effect as asking for inheritance of all encryption params. 1300 */ 1301 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1302 1303 int rv = dsl_sync_task(name, 1304 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1305 6, ZFS_SPACE_CHECK_NORMAL); 1306 1307 if (rv == 0) 1308 zvol_create_minor(name); 1309 return (rv); 1310 } 1311 1312 typedef struct dmu_objset_clone_arg { 1313 const char *doca_clone; 1314 const char *doca_origin; 1315 cred_t *doca_cred; 1316 proc_t *doca_proc; 1317 } dmu_objset_clone_arg_t; 1318 1319 /*ARGSUSED*/ 1320 static int 1321 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1322 { 1323 dmu_objset_clone_arg_t *doca = arg; 1324 dsl_dir_t *pdd; 1325 const char *tail; 1326 int error; 1327 dsl_dataset_t *origin; 1328 dsl_pool_t *dp = dmu_tx_pool(tx); 1329 1330 if (strchr(doca->doca_clone, '@') != NULL) 1331 return (SET_ERROR(EINVAL)); 1332 1333 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1334 return (SET_ERROR(ENAMETOOLONG)); 1335 1336 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1337 if (error != 0) 1338 return (error); 1339 if (tail == NULL) { 1340 dsl_dir_rele(pdd, FTAG); 1341 return (SET_ERROR(EEXIST)); 1342 } 1343 1344 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1345 doca->doca_cred, doca->doca_proc); 1346 if (error != 0) { 1347 dsl_dir_rele(pdd, FTAG); 1348 return (SET_ERROR(EDQUOT)); 1349 } 1350 1351 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1352 if (error != 0) { 1353 dsl_dir_rele(pdd, FTAG); 1354 return (error); 1355 } 1356 1357 /* You can only clone snapshots, not the head datasets. */ 1358 if (!origin->ds_is_snapshot) { 1359 dsl_dataset_rele(origin, FTAG); 1360 dsl_dir_rele(pdd, FTAG); 1361 return (SET_ERROR(EINVAL)); 1362 } 1363 1364 dsl_dataset_rele(origin, FTAG); 1365 dsl_dir_rele(pdd, FTAG); 1366 1367 return (0); 1368 } 1369 1370 static void 1371 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1372 { 1373 dmu_objset_clone_arg_t *doca = arg; 1374 dsl_pool_t *dp = dmu_tx_pool(tx); 1375 dsl_dir_t *pdd; 1376 const char *tail; 1377 dsl_dataset_t *origin, *ds; 1378 uint64_t obj; 1379 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1380 1381 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1382 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1383 1384 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1385 doca->doca_cred, NULL, tx); 1386 1387 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1388 dsl_dataset_name(origin, namebuf); 1389 spa_history_log_internal_ds(ds, "clone", tx, 1390 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1391 dsl_dataset_rele(ds, FTAG); 1392 dsl_dataset_rele(origin, FTAG); 1393 dsl_dir_rele(pdd, FTAG); 1394 } 1395 1396 int 1397 dmu_objset_clone(const char *clone, const char *origin) 1398 { 1399 dmu_objset_clone_arg_t doca; 1400 1401 doca.doca_clone = clone; 1402 doca.doca_origin = origin; 1403 doca.doca_cred = CRED(); 1404 doca.doca_proc = curproc; 1405 1406 int rv = dsl_sync_task(clone, 1407 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1408 6, ZFS_SPACE_CHECK_NORMAL); 1409 1410 if (rv == 0) 1411 zvol_create_minor(clone); 1412 1413 return (rv); 1414 } 1415 1416 int 1417 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1418 { 1419 int err; 1420 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1421 nvlist_t *snaps = fnvlist_alloc(); 1422 1423 fnvlist_add_boolean(snaps, longsnap); 1424 kmem_strfree(longsnap); 1425 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1426 fnvlist_free(snaps); 1427 return (err); 1428 } 1429 1430 static void 1431 dmu_objset_upgrade_task_cb(void *data) 1432 { 1433 objset_t *os = data; 1434 1435 mutex_enter(&os->os_upgrade_lock); 1436 os->os_upgrade_status = EINTR; 1437 if (!os->os_upgrade_exit) { 1438 int status; 1439 1440 mutex_exit(&os->os_upgrade_lock); 1441 1442 status = os->os_upgrade_cb(os); 1443 1444 mutex_enter(&os->os_upgrade_lock); 1445 1446 os->os_upgrade_status = status; 1447 } 1448 os->os_upgrade_exit = B_TRUE; 1449 os->os_upgrade_id = 0; 1450 mutex_exit(&os->os_upgrade_lock); 1451 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1452 } 1453 1454 static void 1455 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1456 { 1457 if (os->os_upgrade_id != 0) 1458 return; 1459 1460 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1461 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1462 1463 mutex_enter(&os->os_upgrade_lock); 1464 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1465 os->os_upgrade_exit = B_FALSE; 1466 os->os_upgrade_cb = cb; 1467 os->os_upgrade_id = taskq_dispatch( 1468 os->os_spa->spa_upgrade_taskq, 1469 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1470 if (os->os_upgrade_id == TASKQID_INVALID) { 1471 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1472 os->os_upgrade_status = ENOMEM; 1473 } 1474 } else { 1475 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1476 } 1477 mutex_exit(&os->os_upgrade_lock); 1478 } 1479 1480 static void 1481 dmu_objset_upgrade_stop(objset_t *os) 1482 { 1483 mutex_enter(&os->os_upgrade_lock); 1484 os->os_upgrade_exit = B_TRUE; 1485 if (os->os_upgrade_id != 0) { 1486 taskqid_t id = os->os_upgrade_id; 1487 1488 os->os_upgrade_id = 0; 1489 mutex_exit(&os->os_upgrade_lock); 1490 1491 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1492 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1493 } 1494 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1495 } else { 1496 mutex_exit(&os->os_upgrade_lock); 1497 } 1498 } 1499 1500 static void 1501 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1502 { 1503 dnode_t *dn; 1504 1505 while ((dn = multilist_sublist_head(list)) != NULL) { 1506 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1507 ASSERT(dn->dn_dbuf->db_data_pending); 1508 /* 1509 * Initialize dn_zio outside dnode_sync() because the 1510 * meta-dnode needs to set it outside dnode_sync(). 1511 */ 1512 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1513 ASSERT(dn->dn_zio); 1514 1515 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1516 multilist_sublist_remove(list, dn); 1517 1518 /* 1519 * See the comment above dnode_rele_task() for an explanation 1520 * of why this dnode hold is always needed (even when not 1521 * doing user accounting). 1522 */ 1523 multilist_t *newlist = dn->dn_objset->os_synced_dnodes; 1524 (void) dnode_add_ref(dn, newlist); 1525 multilist_insert(newlist, dn); 1526 1527 dnode_sync(dn, tx); 1528 } 1529 } 1530 1531 /* ARGSUSED */ 1532 static void 1533 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1534 { 1535 blkptr_t *bp = zio->io_bp; 1536 objset_t *os = arg; 1537 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1538 uint64_t fill = 0; 1539 1540 ASSERT(!BP_IS_EMBEDDED(bp)); 1541 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1542 ASSERT0(BP_GET_LEVEL(bp)); 1543 1544 /* 1545 * Update rootbp fill count: it should be the number of objects 1546 * allocated in the object set (not counting the "special" 1547 * objects that are stored in the objset_phys_t -- the meta 1548 * dnode and user/group/project accounting objects). 1549 */ 1550 for (int i = 0; i < dnp->dn_nblkptr; i++) 1551 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1552 1553 BP_SET_FILL(bp, fill); 1554 1555 if (os->os_dsl_dataset != NULL) 1556 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1557 *os->os_rootbp = *bp; 1558 if (os->os_dsl_dataset != NULL) 1559 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1560 } 1561 1562 /* ARGSUSED */ 1563 static void 1564 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1565 { 1566 blkptr_t *bp = zio->io_bp; 1567 blkptr_t *bp_orig = &zio->io_bp_orig; 1568 objset_t *os = arg; 1569 1570 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1571 ASSERT(BP_EQUAL(bp, bp_orig)); 1572 } else { 1573 dsl_dataset_t *ds = os->os_dsl_dataset; 1574 dmu_tx_t *tx = os->os_synctx; 1575 1576 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1577 dsl_dataset_block_born(ds, bp, tx); 1578 } 1579 kmem_free(bp, sizeof (*bp)); 1580 } 1581 1582 typedef struct sync_dnodes_arg { 1583 multilist_t *sda_list; 1584 int sda_sublist_idx; 1585 multilist_t *sda_newlist; 1586 dmu_tx_t *sda_tx; 1587 } sync_dnodes_arg_t; 1588 1589 static void 1590 sync_dnodes_task(void *arg) 1591 { 1592 sync_dnodes_arg_t *sda = arg; 1593 1594 multilist_sublist_t *ms = 1595 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1596 1597 dmu_objset_sync_dnodes(ms, sda->sda_tx); 1598 1599 multilist_sublist_unlock(ms); 1600 1601 kmem_free(sda, sizeof (*sda)); 1602 } 1603 1604 1605 /* called from dsl */ 1606 void 1607 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1608 { 1609 int txgoff; 1610 zbookmark_phys_t zb; 1611 zio_prop_t zp; 1612 zio_t *zio; 1613 list_t *list; 1614 dbuf_dirty_record_t *dr; 1615 int num_sublists; 1616 multilist_t *ml; 1617 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1618 *blkptr_copy = *os->os_rootbp; 1619 1620 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg); 1621 1622 ASSERT(dmu_tx_is_syncing(tx)); 1623 /* XXX the write_done callback should really give us the tx... */ 1624 os->os_synctx = tx; 1625 1626 if (os->os_dsl_dataset == NULL) { 1627 /* 1628 * This is the MOS. If we have upgraded, 1629 * spa_max_replication() could change, so reset 1630 * os_copies here. 1631 */ 1632 os->os_copies = spa_max_replication(os->os_spa); 1633 } 1634 1635 /* 1636 * Create the root block IO 1637 */ 1638 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1639 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1640 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1641 arc_release(os->os_phys_buf, &os->os_phys_buf); 1642 1643 dmu_write_policy(os, NULL, 0, 0, &zp); 1644 1645 /* 1646 * If we are either claiming the ZIL or doing a raw receive, write 1647 * out the os_phys_buf raw. Neither of these actions will effect the 1648 * MAC at this point. 1649 */ 1650 if (os->os_raw_receive || 1651 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1652 ASSERT(os->os_encrypted); 1653 arc_convert_to_raw(os->os_phys_buf, 1654 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1655 DMU_OT_OBJSET, NULL, NULL, NULL); 1656 } 1657 1658 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1659 blkptr_copy, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os), 1660 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done, 1661 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1662 1663 /* 1664 * Sync special dnodes - the parent IO for the sync is the root block 1665 */ 1666 DMU_META_DNODE(os)->dn_zio = zio; 1667 dnode_sync(DMU_META_DNODE(os), tx); 1668 1669 os->os_phys->os_flags = os->os_flags; 1670 1671 if (DMU_USERUSED_DNODE(os) && 1672 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1673 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1674 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1675 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1676 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1677 } 1678 1679 if (DMU_PROJECTUSED_DNODE(os) && 1680 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1681 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1682 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1683 } 1684 1685 txgoff = tx->tx_txg & TXG_MASK; 1686 1687 /* 1688 * We must create the list here because it uses the 1689 * dn_dirty_link[] of this txg. But it may already 1690 * exist because we call dsl_dataset_sync() twice per txg. 1691 */ 1692 if (os->os_synced_dnodes == NULL) { 1693 os->os_synced_dnodes = 1694 multilist_create(sizeof (dnode_t), 1695 offsetof(dnode_t, dn_dirty_link[txgoff]), 1696 dnode_multilist_index_func); 1697 } else { 1698 ASSERT3U(os->os_synced_dnodes->ml_offset, ==, 1699 offsetof(dnode_t, dn_dirty_link[txgoff])); 1700 } 1701 1702 ml = os->os_dirty_dnodes[txgoff]; 1703 num_sublists = multilist_get_num_sublists(ml); 1704 for (int i = 0; i < num_sublists; i++) { 1705 if (multilist_sublist_is_empty_idx(ml, i)) 1706 continue; 1707 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1708 sda->sda_list = ml; 1709 sda->sda_sublist_idx = i; 1710 sda->sda_tx = tx; 1711 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1712 sync_dnodes_task, sda, 0); 1713 /* callback frees sda */ 1714 } 1715 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1716 1717 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1718 while ((dr = list_head(list)) != NULL) { 1719 ASSERT0(dr->dr_dbuf->db_level); 1720 list_remove(list, dr); 1721 zio_nowait(dr->dr_zio); 1722 } 1723 1724 /* Enable dnode backfill if enough objects have been freed. */ 1725 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1726 os->os_rescan_dnodes = B_TRUE; 1727 os->os_freed_dnodes = 0; 1728 } 1729 1730 /* 1731 * Free intent log blocks up to this tx. 1732 */ 1733 zil_sync(os->os_zil, tx); 1734 os->os_phys->os_zil_header = os->os_zil_header; 1735 zio_nowait(zio); 1736 } 1737 1738 boolean_t 1739 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1740 { 1741 return (!multilist_is_empty(os->os_dirty_dnodes[txg & TXG_MASK])); 1742 } 1743 1744 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1745 1746 void 1747 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1748 { 1749 file_cbs[ost] = cb; 1750 } 1751 1752 int 1753 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1754 zfs_file_info_t *zfi) 1755 { 1756 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1757 if (cb == NULL) 1758 return (EINVAL); 1759 return (cb(bonustype, data, zfi)); 1760 } 1761 1762 boolean_t 1763 dmu_objset_userused_enabled(objset_t *os) 1764 { 1765 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1766 file_cbs[os->os_phys->os_type] != NULL && 1767 DMU_USERUSED_DNODE(os) != NULL); 1768 } 1769 1770 boolean_t 1771 dmu_objset_userobjused_enabled(objset_t *os) 1772 { 1773 return (dmu_objset_userused_enabled(os) && 1774 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1775 } 1776 1777 boolean_t 1778 dmu_objset_projectquota_enabled(objset_t *os) 1779 { 1780 return (file_cbs[os->os_phys->os_type] != NULL && 1781 DMU_PROJECTUSED_DNODE(os) != NULL && 1782 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1783 } 1784 1785 typedef struct userquota_node { 1786 /* must be in the first filed, see userquota_update_cache() */ 1787 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1788 int64_t uqn_delta; 1789 avl_node_t uqn_node; 1790 } userquota_node_t; 1791 1792 typedef struct userquota_cache { 1793 avl_tree_t uqc_user_deltas; 1794 avl_tree_t uqc_group_deltas; 1795 avl_tree_t uqc_project_deltas; 1796 } userquota_cache_t; 1797 1798 static int 1799 userquota_compare(const void *l, const void *r) 1800 { 1801 const userquota_node_t *luqn = l; 1802 const userquota_node_t *ruqn = r; 1803 int rv; 1804 1805 /* 1806 * NB: can only access uqn_id because userquota_update_cache() doesn't 1807 * pass in an entire userquota_node_t. 1808 */ 1809 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1810 1811 return (TREE_ISIGN(rv)); 1812 } 1813 1814 static void 1815 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1816 { 1817 void *cookie; 1818 userquota_node_t *uqn; 1819 1820 ASSERT(dmu_tx_is_syncing(tx)); 1821 1822 cookie = NULL; 1823 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1824 &cookie)) != NULL) { 1825 /* 1826 * os_userused_lock protects against concurrent calls to 1827 * zap_increment_int(). It's needed because zap_increment_int() 1828 * is not thread-safe (i.e. not atomic). 1829 */ 1830 mutex_enter(&os->os_userused_lock); 1831 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1832 uqn->uqn_id, uqn->uqn_delta, tx)); 1833 mutex_exit(&os->os_userused_lock); 1834 kmem_free(uqn, sizeof (*uqn)); 1835 } 1836 avl_destroy(&cache->uqc_user_deltas); 1837 1838 cookie = NULL; 1839 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1840 &cookie)) != NULL) { 1841 mutex_enter(&os->os_userused_lock); 1842 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1843 uqn->uqn_id, uqn->uqn_delta, tx)); 1844 mutex_exit(&os->os_userused_lock); 1845 kmem_free(uqn, sizeof (*uqn)); 1846 } 1847 avl_destroy(&cache->uqc_group_deltas); 1848 1849 if (dmu_objset_projectquota_enabled(os)) { 1850 cookie = NULL; 1851 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1852 &cookie)) != NULL) { 1853 mutex_enter(&os->os_userused_lock); 1854 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1855 uqn->uqn_id, uqn->uqn_delta, tx)); 1856 mutex_exit(&os->os_userused_lock); 1857 kmem_free(uqn, sizeof (*uqn)); 1858 } 1859 avl_destroy(&cache->uqc_project_deltas); 1860 } 1861 } 1862 1863 static void 1864 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1865 { 1866 userquota_node_t *uqn; 1867 avl_index_t idx; 1868 1869 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1870 /* 1871 * Use id directly for searching because uqn_id is the first field of 1872 * userquota_node_t and fields after uqn_id won't be accessed in 1873 * avl_find(). 1874 */ 1875 uqn = avl_find(avl, (const void *)id, &idx); 1876 if (uqn == NULL) { 1877 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1878 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1879 avl_insert(avl, uqn, idx); 1880 } 1881 uqn->uqn_delta += delta; 1882 } 1883 1884 static void 1885 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1886 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1887 boolean_t subtract) 1888 { 1889 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1890 int64_t delta = DNODE_MIN_SIZE + used; 1891 char name[20]; 1892 1893 if (subtract) 1894 delta = -delta; 1895 1896 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1897 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1898 1899 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1900 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1901 1902 if (dmu_objset_projectquota_enabled(os)) { 1903 (void) snprintf(name, sizeof (name), "%llx", 1904 (longlong_t)project); 1905 userquota_update_cache(&cache->uqc_project_deltas, 1906 name, delta); 1907 } 1908 } 1909 } 1910 1911 static void 1912 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1913 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1914 { 1915 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1916 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1917 int delta = subtract ? -1 : 1; 1918 1919 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1920 (longlong_t)user); 1921 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1922 1923 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1924 (longlong_t)group); 1925 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1926 1927 if (dmu_objset_projectquota_enabled(os)) { 1928 (void) snprintf(name, sizeof (name), 1929 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1930 userquota_update_cache(&cache->uqc_project_deltas, 1931 name, delta); 1932 } 1933 } 1934 } 1935 1936 typedef struct userquota_updates_arg { 1937 objset_t *uua_os; 1938 int uua_sublist_idx; 1939 dmu_tx_t *uua_tx; 1940 } userquota_updates_arg_t; 1941 1942 static void 1943 userquota_updates_task(void *arg) 1944 { 1945 userquota_updates_arg_t *uua = arg; 1946 objset_t *os = uua->uua_os; 1947 dmu_tx_t *tx = uua->uua_tx; 1948 dnode_t *dn; 1949 userquota_cache_t cache = { { 0 } }; 1950 1951 multilist_sublist_t *list = 1952 multilist_sublist_lock(os->os_synced_dnodes, uua->uua_sublist_idx); 1953 1954 ASSERT(multilist_sublist_head(list) == NULL || 1955 dmu_objset_userused_enabled(os)); 1956 avl_create(&cache.uqc_user_deltas, userquota_compare, 1957 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1958 avl_create(&cache.uqc_group_deltas, userquota_compare, 1959 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1960 if (dmu_objset_projectquota_enabled(os)) 1961 avl_create(&cache.uqc_project_deltas, userquota_compare, 1962 sizeof (userquota_node_t), offsetof(userquota_node_t, 1963 uqn_node)); 1964 1965 while ((dn = multilist_sublist_head(list)) != NULL) { 1966 int flags; 1967 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 1968 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 1969 dn->dn_phys->dn_flags & 1970 DNODE_FLAG_USERUSED_ACCOUNTED); 1971 1972 flags = dn->dn_id_flags; 1973 ASSERT(flags); 1974 if (flags & DN_ID_OLD_EXIST) { 1975 do_userquota_update(os, &cache, dn->dn_oldused, 1976 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 1977 dn->dn_oldprojid, B_TRUE); 1978 do_userobjquota_update(os, &cache, dn->dn_oldflags, 1979 dn->dn_olduid, dn->dn_oldgid, 1980 dn->dn_oldprojid, B_TRUE); 1981 } 1982 if (flags & DN_ID_NEW_EXIST) { 1983 do_userquota_update(os, &cache, 1984 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 1985 dn->dn_newuid, dn->dn_newgid, 1986 dn->dn_newprojid, B_FALSE); 1987 do_userobjquota_update(os, &cache, 1988 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 1989 dn->dn_newprojid, B_FALSE); 1990 } 1991 1992 mutex_enter(&dn->dn_mtx); 1993 dn->dn_oldused = 0; 1994 dn->dn_oldflags = 0; 1995 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 1996 dn->dn_olduid = dn->dn_newuid; 1997 dn->dn_oldgid = dn->dn_newgid; 1998 dn->dn_oldprojid = dn->dn_newprojid; 1999 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2000 if (dn->dn_bonuslen == 0) 2001 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2002 else 2003 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2004 } 2005 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2006 mutex_exit(&dn->dn_mtx); 2007 2008 multilist_sublist_remove(list, dn); 2009 dnode_rele(dn, os->os_synced_dnodes); 2010 } 2011 do_userquota_cacheflush(os, &cache, tx); 2012 multilist_sublist_unlock(list); 2013 kmem_free(uua, sizeof (*uua)); 2014 } 2015 2016 /* 2017 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2018 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2019 * evicted because the block containing the dnode can't be evicted until it is 2020 * written out. However, this hold is necessary to prevent the dnode_t from 2021 * being moved (via dnode_move()) while it's still referenced by 2022 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2023 * dirty_lightweight_leaf-type dirty records. 2024 * 2025 * If we are doing user-object accounting, the dnode_rele() happens from 2026 * userquota_updates_task() instead. 2027 */ 2028 static void 2029 dnode_rele_task(void *arg) 2030 { 2031 userquota_updates_arg_t *uua = arg; 2032 objset_t *os = uua->uua_os; 2033 2034 multilist_sublist_t *list = 2035 multilist_sublist_lock(os->os_synced_dnodes, uua->uua_sublist_idx); 2036 2037 dnode_t *dn; 2038 while ((dn = multilist_sublist_head(list)) != NULL) { 2039 multilist_sublist_remove(list, dn); 2040 dnode_rele(dn, os->os_synced_dnodes); 2041 } 2042 multilist_sublist_unlock(list); 2043 kmem_free(uua, sizeof (*uua)); 2044 } 2045 2046 /* 2047 * Return TRUE if userquota updates are needed. 2048 */ 2049 static boolean_t 2050 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2051 { 2052 if (!dmu_objset_userused_enabled(os)) 2053 return (B_FALSE); 2054 2055 /* 2056 * If this is a raw receive just return and handle accounting 2057 * later when we have the keys loaded. We also don't do user 2058 * accounting during claiming since the datasets are not owned 2059 * for the duration of claiming and this txg should only be 2060 * used for recovery. 2061 */ 2062 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2063 return (B_FALSE); 2064 2065 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2066 return (B_FALSE); 2067 2068 /* Allocate the user/group/project used objects if necessary. */ 2069 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2070 VERIFY0(zap_create_claim(os, 2071 DMU_USERUSED_OBJECT, 2072 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2073 VERIFY0(zap_create_claim(os, 2074 DMU_GROUPUSED_OBJECT, 2075 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2076 } 2077 2078 if (dmu_objset_projectquota_enabled(os) && 2079 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2080 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2081 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2082 } 2083 return (B_TRUE); 2084 } 2085 2086 /* 2087 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2088 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2089 * The caller must taskq_wait(dp_sync_taskq). 2090 */ 2091 void 2092 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2093 { 2094 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2095 2096 int num_sublists = multilist_get_num_sublists(os->os_synced_dnodes); 2097 for (int i = 0; i < num_sublists; i++) { 2098 userquota_updates_arg_t *uua = 2099 kmem_alloc(sizeof (*uua), KM_SLEEP); 2100 uua->uua_os = os; 2101 uua->uua_sublist_idx = i; 2102 uua->uua_tx = tx; 2103 2104 /* 2105 * If we don't need to update userquotas, use 2106 * dnode_rele_task() to call dnode_rele() 2107 */ 2108 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2109 need_userquota ? userquota_updates_task : dnode_rele_task, 2110 uua, 0); 2111 /* callback frees uua */ 2112 } 2113 } 2114 2115 2116 /* 2117 * Returns a pointer to data to find uid/gid from 2118 * 2119 * If a dirty record for transaction group that is syncing can't 2120 * be found then NULL is returned. In the NULL case it is assumed 2121 * the uid/gid aren't changing. 2122 */ 2123 static void * 2124 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2125 { 2126 dbuf_dirty_record_t *dr; 2127 void *data; 2128 2129 if (db->db_dirtycnt == 0) 2130 return (db->db.db_data); /* Nothing is changing */ 2131 2132 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2133 2134 if (dr == NULL) { 2135 data = NULL; 2136 } else { 2137 if (dr->dr_dnode->dn_bonuslen == 0 && 2138 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2139 data = dr->dt.dl.dr_data->b_data; 2140 else 2141 data = dr->dt.dl.dr_data; 2142 } 2143 2144 return (data); 2145 } 2146 2147 void 2148 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2149 { 2150 objset_t *os = dn->dn_objset; 2151 void *data = NULL; 2152 dmu_buf_impl_t *db = NULL; 2153 int flags = dn->dn_id_flags; 2154 int error; 2155 boolean_t have_spill = B_FALSE; 2156 2157 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2158 return; 2159 2160 /* 2161 * Raw receives introduce a problem with user accounting. Raw 2162 * receives cannot update the user accounting info because the 2163 * user ids and the sizes are encrypted. To guarantee that we 2164 * never end up with bad user accounting, we simply disable it 2165 * during raw receives. We also disable this for normal receives 2166 * so that an incremental raw receive may be done on top of an 2167 * existing non-raw receive. 2168 */ 2169 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2170 return; 2171 2172 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2173 DN_ID_CHKED_SPILL))) 2174 return; 2175 2176 if (before && dn->dn_bonuslen != 0) 2177 data = DN_BONUS(dn->dn_phys); 2178 else if (!before && dn->dn_bonuslen != 0) { 2179 if (dn->dn_bonus) { 2180 db = dn->dn_bonus; 2181 mutex_enter(&db->db_mtx); 2182 data = dmu_objset_userquota_find_data(db, tx); 2183 } else { 2184 data = DN_BONUS(dn->dn_phys); 2185 } 2186 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2187 int rf = 0; 2188 2189 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2190 rf |= DB_RF_HAVESTRUCT; 2191 error = dmu_spill_hold_by_dnode(dn, 2192 rf | DB_RF_MUST_SUCCEED, 2193 FTAG, (dmu_buf_t **)&db); 2194 ASSERT(error == 0); 2195 mutex_enter(&db->db_mtx); 2196 data = (before) ? db->db.db_data : 2197 dmu_objset_userquota_find_data(db, tx); 2198 have_spill = B_TRUE; 2199 } else { 2200 mutex_enter(&dn->dn_mtx); 2201 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2202 mutex_exit(&dn->dn_mtx); 2203 return; 2204 } 2205 2206 /* 2207 * Must always call the callback in case the object 2208 * type has changed and that type isn't an object type to track 2209 */ 2210 zfs_file_info_t zfi; 2211 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2212 2213 if (before) { 2214 ASSERT(data); 2215 dn->dn_olduid = zfi.zfi_user; 2216 dn->dn_oldgid = zfi.zfi_group; 2217 dn->dn_oldprojid = zfi.zfi_project; 2218 } else if (data) { 2219 dn->dn_newuid = zfi.zfi_user; 2220 dn->dn_newgid = zfi.zfi_group; 2221 dn->dn_newprojid = zfi.zfi_project; 2222 } 2223 2224 /* 2225 * Preserve existing uid/gid when the callback can't determine 2226 * what the new uid/gid are and the callback returned EEXIST. 2227 * The EEXIST error tells us to just use the existing uid/gid. 2228 * If we don't know what the old values are then just assign 2229 * them to 0, since that is a new file being created. 2230 */ 2231 if (!before && data == NULL && error == EEXIST) { 2232 if (flags & DN_ID_OLD_EXIST) { 2233 dn->dn_newuid = dn->dn_olduid; 2234 dn->dn_newgid = dn->dn_oldgid; 2235 dn->dn_newprojid = dn->dn_oldprojid; 2236 } else { 2237 dn->dn_newuid = 0; 2238 dn->dn_newgid = 0; 2239 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2240 } 2241 error = 0; 2242 } 2243 2244 if (db) 2245 mutex_exit(&db->db_mtx); 2246 2247 mutex_enter(&dn->dn_mtx); 2248 if (error == 0 && before) 2249 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2250 if (error == 0 && !before) 2251 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2252 2253 if (have_spill) { 2254 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2255 } else { 2256 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2257 } 2258 mutex_exit(&dn->dn_mtx); 2259 if (have_spill) 2260 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2261 } 2262 2263 boolean_t 2264 dmu_objset_userspace_present(objset_t *os) 2265 { 2266 return (os->os_phys->os_flags & 2267 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2268 } 2269 2270 boolean_t 2271 dmu_objset_userobjspace_present(objset_t *os) 2272 { 2273 return (os->os_phys->os_flags & 2274 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2275 } 2276 2277 boolean_t 2278 dmu_objset_projectquota_present(objset_t *os) 2279 { 2280 return (os->os_phys->os_flags & 2281 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2282 } 2283 2284 static int 2285 dmu_objset_space_upgrade(objset_t *os) 2286 { 2287 uint64_t obj; 2288 int err = 0; 2289 2290 /* 2291 * We simply need to mark every object dirty, so that it will be 2292 * synced out and now accounted. If this is called 2293 * concurrently, or if we already did some work before crashing, 2294 * that's fine, since we track each object's accounted state 2295 * independently. 2296 */ 2297 2298 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2299 dmu_tx_t *tx; 2300 dmu_buf_t *db; 2301 int objerr; 2302 2303 mutex_enter(&os->os_upgrade_lock); 2304 if (os->os_upgrade_exit) 2305 err = SET_ERROR(EINTR); 2306 mutex_exit(&os->os_upgrade_lock); 2307 if (err != 0) 2308 return (err); 2309 2310 if (issig(JUSTLOOKING) && issig(FORREAL)) 2311 return (SET_ERROR(EINTR)); 2312 2313 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2314 if (objerr != 0) 2315 continue; 2316 tx = dmu_tx_create(os); 2317 dmu_tx_hold_bonus(tx, obj); 2318 objerr = dmu_tx_assign(tx, TXG_WAIT); 2319 if (objerr != 0) { 2320 dmu_buf_rele(db, FTAG); 2321 dmu_tx_abort(tx); 2322 continue; 2323 } 2324 dmu_buf_will_dirty(db, tx); 2325 dmu_buf_rele(db, FTAG); 2326 dmu_tx_commit(tx); 2327 } 2328 return (0); 2329 } 2330 2331 static int 2332 dmu_objset_userspace_upgrade_cb(objset_t *os) 2333 { 2334 int err = 0; 2335 2336 if (dmu_objset_userspace_present(os)) 2337 return (0); 2338 if (dmu_objset_is_snapshot(os)) 2339 return (SET_ERROR(EINVAL)); 2340 if (!dmu_objset_userused_enabled(os)) 2341 return (SET_ERROR(ENOTSUP)); 2342 2343 err = dmu_objset_space_upgrade(os); 2344 if (err) 2345 return (err); 2346 2347 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2348 txg_wait_synced(dmu_objset_pool(os), 0); 2349 return (0); 2350 } 2351 2352 void 2353 dmu_objset_userspace_upgrade(objset_t *os) 2354 { 2355 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2356 } 2357 2358 static int 2359 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2360 { 2361 int err = 0; 2362 2363 if (dmu_objset_userobjspace_present(os) && 2364 dmu_objset_projectquota_present(os)) 2365 return (0); 2366 if (dmu_objset_is_snapshot(os)) 2367 return (SET_ERROR(EINVAL)); 2368 if (!dmu_objset_userused_enabled(os)) 2369 return (SET_ERROR(ENOTSUP)); 2370 if (!dmu_objset_projectquota_enabled(os) && 2371 dmu_objset_userobjspace_present(os)) 2372 return (SET_ERROR(ENOTSUP)); 2373 2374 if (dmu_objset_userobjused_enabled(os)) 2375 dmu_objset_ds(os)->ds_feature_activation[ 2376 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2377 if (dmu_objset_projectquota_enabled(os)) 2378 dmu_objset_ds(os)->ds_feature_activation[ 2379 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2380 2381 err = dmu_objset_space_upgrade(os); 2382 if (err) 2383 return (err); 2384 2385 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2386 if (dmu_objset_userobjused_enabled(os)) 2387 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2388 if (dmu_objset_projectquota_enabled(os)) 2389 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2390 2391 txg_wait_synced(dmu_objset_pool(os), 0); 2392 return (0); 2393 } 2394 2395 void 2396 dmu_objset_id_quota_upgrade(objset_t *os) 2397 { 2398 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2399 } 2400 2401 boolean_t 2402 dmu_objset_userobjspace_upgradable(objset_t *os) 2403 { 2404 return (dmu_objset_type(os) == DMU_OST_ZFS && 2405 !dmu_objset_is_snapshot(os) && 2406 dmu_objset_userobjused_enabled(os) && 2407 !dmu_objset_userobjspace_present(os) && 2408 spa_writeable(dmu_objset_spa(os))); 2409 } 2410 2411 boolean_t 2412 dmu_objset_projectquota_upgradable(objset_t *os) 2413 { 2414 return (dmu_objset_type(os) == DMU_OST_ZFS && 2415 !dmu_objset_is_snapshot(os) && 2416 dmu_objset_projectquota_enabled(os) && 2417 !dmu_objset_projectquota_present(os) && 2418 spa_writeable(dmu_objset_spa(os))); 2419 } 2420 2421 void 2422 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2423 uint64_t *usedobjsp, uint64_t *availobjsp) 2424 { 2425 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2426 usedobjsp, availobjsp); 2427 } 2428 2429 uint64_t 2430 dmu_objset_fsid_guid(objset_t *os) 2431 { 2432 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2433 } 2434 2435 void 2436 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2437 { 2438 stat->dds_type = os->os_phys->os_type; 2439 if (os->os_dsl_dataset) 2440 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2441 } 2442 2443 void 2444 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2445 { 2446 ASSERT(os->os_dsl_dataset || 2447 os->os_phys->os_type == DMU_OST_META); 2448 2449 if (os->os_dsl_dataset != NULL) 2450 dsl_dataset_stats(os->os_dsl_dataset, nv); 2451 2452 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2453 os->os_phys->os_type); 2454 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2455 dmu_objset_userspace_present(os)); 2456 } 2457 2458 int 2459 dmu_objset_is_snapshot(objset_t *os) 2460 { 2461 if (os->os_dsl_dataset != NULL) 2462 return (os->os_dsl_dataset->ds_is_snapshot); 2463 else 2464 return (B_FALSE); 2465 } 2466 2467 int 2468 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2469 boolean_t *conflict) 2470 { 2471 dsl_dataset_t *ds = os->os_dsl_dataset; 2472 uint64_t ignored; 2473 2474 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2475 return (SET_ERROR(ENOENT)); 2476 2477 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2478 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2479 MT_NORMALIZE, real, maxlen, conflict)); 2480 } 2481 2482 int 2483 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2484 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2485 { 2486 dsl_dataset_t *ds = os->os_dsl_dataset; 2487 zap_cursor_t cursor; 2488 zap_attribute_t attr; 2489 2490 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2491 2492 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2493 return (SET_ERROR(ENOENT)); 2494 2495 zap_cursor_init_serialized(&cursor, 2496 ds->ds_dir->dd_pool->dp_meta_objset, 2497 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2498 2499 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2500 zap_cursor_fini(&cursor); 2501 return (SET_ERROR(ENOENT)); 2502 } 2503 2504 if (strlen(attr.za_name) + 1 > namelen) { 2505 zap_cursor_fini(&cursor); 2506 return (SET_ERROR(ENAMETOOLONG)); 2507 } 2508 2509 (void) strlcpy(name, attr.za_name, namelen); 2510 if (idp) 2511 *idp = attr.za_first_integer; 2512 if (case_conflict) 2513 *case_conflict = attr.za_normalization_conflict; 2514 zap_cursor_advance(&cursor); 2515 *offp = zap_cursor_serialize(&cursor); 2516 zap_cursor_fini(&cursor); 2517 2518 return (0); 2519 } 2520 2521 int 2522 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2523 { 2524 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2525 } 2526 2527 int 2528 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2529 uint64_t *idp, uint64_t *offp) 2530 { 2531 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2532 zap_cursor_t cursor; 2533 zap_attribute_t attr; 2534 2535 /* there is no next dir on a snapshot! */ 2536 if (os->os_dsl_dataset->ds_object != 2537 dsl_dir_phys(dd)->dd_head_dataset_obj) 2538 return (SET_ERROR(ENOENT)); 2539 2540 zap_cursor_init_serialized(&cursor, 2541 dd->dd_pool->dp_meta_objset, 2542 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2543 2544 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2545 zap_cursor_fini(&cursor); 2546 return (SET_ERROR(ENOENT)); 2547 } 2548 2549 if (strlen(attr.za_name) + 1 > namelen) { 2550 zap_cursor_fini(&cursor); 2551 return (SET_ERROR(ENAMETOOLONG)); 2552 } 2553 2554 (void) strlcpy(name, attr.za_name, namelen); 2555 if (idp) 2556 *idp = attr.za_first_integer; 2557 zap_cursor_advance(&cursor); 2558 *offp = zap_cursor_serialize(&cursor); 2559 zap_cursor_fini(&cursor); 2560 2561 return (0); 2562 } 2563 2564 typedef struct dmu_objset_find_ctx { 2565 taskq_t *dc_tq; 2566 dsl_pool_t *dc_dp; 2567 uint64_t dc_ddobj; 2568 char *dc_ddname; /* last component of ddobj's name */ 2569 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2570 void *dc_arg; 2571 int dc_flags; 2572 kmutex_t *dc_error_lock; 2573 int *dc_error; 2574 } dmu_objset_find_ctx_t; 2575 2576 static void 2577 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2578 { 2579 dsl_pool_t *dp = dcp->dc_dp; 2580 dsl_dir_t *dd; 2581 dsl_dataset_t *ds; 2582 zap_cursor_t zc; 2583 zap_attribute_t *attr; 2584 uint64_t thisobj; 2585 int err = 0; 2586 2587 /* don't process if there already was an error */ 2588 if (*dcp->dc_error != 0) 2589 goto out; 2590 2591 /* 2592 * Note: passing the name (dc_ddname) here is optional, but it 2593 * improves performance because we don't need to call 2594 * zap_value_search() to determine the name. 2595 */ 2596 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2597 if (err != 0) 2598 goto out; 2599 2600 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2601 if (dd->dd_myname[0] == '$') { 2602 dsl_dir_rele(dd, FTAG); 2603 goto out; 2604 } 2605 2606 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2607 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2608 2609 /* 2610 * Iterate over all children. 2611 */ 2612 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2613 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2614 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2615 zap_cursor_retrieve(&zc, attr) == 0; 2616 (void) zap_cursor_advance(&zc)) { 2617 ASSERT3U(attr->za_integer_length, ==, 2618 sizeof (uint64_t)); 2619 ASSERT3U(attr->za_num_integers, ==, 1); 2620 2621 dmu_objset_find_ctx_t *child_dcp = 2622 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2623 *child_dcp = *dcp; 2624 child_dcp->dc_ddobj = attr->za_first_integer; 2625 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2626 if (dcp->dc_tq != NULL) 2627 (void) taskq_dispatch(dcp->dc_tq, 2628 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2629 else 2630 dmu_objset_find_dp_impl(child_dcp); 2631 } 2632 zap_cursor_fini(&zc); 2633 } 2634 2635 /* 2636 * Iterate over all snapshots. 2637 */ 2638 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2639 dsl_dataset_t *ds; 2640 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2641 2642 if (err == 0) { 2643 uint64_t snapobj; 2644 2645 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2646 dsl_dataset_rele(ds, FTAG); 2647 2648 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2649 zap_cursor_retrieve(&zc, attr) == 0; 2650 (void) zap_cursor_advance(&zc)) { 2651 ASSERT3U(attr->za_integer_length, ==, 2652 sizeof (uint64_t)); 2653 ASSERT3U(attr->za_num_integers, ==, 1); 2654 2655 err = dsl_dataset_hold_obj(dp, 2656 attr->za_first_integer, FTAG, &ds); 2657 if (err != 0) 2658 break; 2659 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2660 dsl_dataset_rele(ds, FTAG); 2661 if (err != 0) 2662 break; 2663 } 2664 zap_cursor_fini(&zc); 2665 } 2666 } 2667 2668 kmem_free(attr, sizeof (zap_attribute_t)); 2669 2670 if (err != 0) { 2671 dsl_dir_rele(dd, FTAG); 2672 goto out; 2673 } 2674 2675 /* 2676 * Apply to self. 2677 */ 2678 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2679 2680 /* 2681 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2682 * that the dir will remain cached, and we won't have to re-instantiate 2683 * it (which could be expensive due to finding its name via 2684 * zap_value_search()). 2685 */ 2686 dsl_dir_rele(dd, FTAG); 2687 if (err != 0) 2688 goto out; 2689 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2690 dsl_dataset_rele(ds, FTAG); 2691 2692 out: 2693 if (err != 0) { 2694 mutex_enter(dcp->dc_error_lock); 2695 /* only keep first error */ 2696 if (*dcp->dc_error == 0) 2697 *dcp->dc_error = err; 2698 mutex_exit(dcp->dc_error_lock); 2699 } 2700 2701 if (dcp->dc_ddname != NULL) 2702 spa_strfree(dcp->dc_ddname); 2703 kmem_free(dcp, sizeof (*dcp)); 2704 } 2705 2706 static void 2707 dmu_objset_find_dp_cb(void *arg) 2708 { 2709 dmu_objset_find_ctx_t *dcp = arg; 2710 dsl_pool_t *dp = dcp->dc_dp; 2711 2712 /* 2713 * We need to get a pool_config_lock here, as there are several 2714 * assert(pool_config_held) down the stack. Getting a lock via 2715 * dsl_pool_config_enter is risky, as it might be stalled by a 2716 * pending writer. This would deadlock, as the write lock can 2717 * only be granted when our parent thread gives up the lock. 2718 * The _prio interface gives us priority over a pending writer. 2719 */ 2720 dsl_pool_config_enter_prio(dp, FTAG); 2721 2722 dmu_objset_find_dp_impl(dcp); 2723 2724 dsl_pool_config_exit(dp, FTAG); 2725 } 2726 2727 /* 2728 * Find objsets under and including ddobj, call func(ds) on each. 2729 * The order for the enumeration is completely undefined. 2730 * func is called with dsl_pool_config held. 2731 */ 2732 int 2733 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2734 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2735 { 2736 int error = 0; 2737 taskq_t *tq = NULL; 2738 int ntasks; 2739 dmu_objset_find_ctx_t *dcp; 2740 kmutex_t err_lock; 2741 2742 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2743 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2744 dcp->dc_tq = NULL; 2745 dcp->dc_dp = dp; 2746 dcp->dc_ddobj = ddobj; 2747 dcp->dc_ddname = NULL; 2748 dcp->dc_func = func; 2749 dcp->dc_arg = arg; 2750 dcp->dc_flags = flags; 2751 dcp->dc_error_lock = &err_lock; 2752 dcp->dc_error = &error; 2753 2754 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2755 /* 2756 * In case a write lock is held we can't make use of 2757 * parallelism, as down the stack of the worker threads 2758 * the lock is asserted via dsl_pool_config_held. 2759 * In case of a read lock this is solved by getting a read 2760 * lock in each worker thread, which isn't possible in case 2761 * of a writer lock. So we fall back to the synchronous path 2762 * here. 2763 * In the future it might be possible to get some magic into 2764 * dsl_pool_config_held in a way that it returns true for 2765 * the worker threads so that a single lock held from this 2766 * thread suffices. For now, stay single threaded. 2767 */ 2768 dmu_objset_find_dp_impl(dcp); 2769 mutex_destroy(&err_lock); 2770 2771 return (error); 2772 } 2773 2774 ntasks = dmu_find_threads; 2775 if (ntasks == 0) 2776 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2777 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2778 INT_MAX, 0); 2779 if (tq == NULL) { 2780 kmem_free(dcp, sizeof (*dcp)); 2781 mutex_destroy(&err_lock); 2782 2783 return (SET_ERROR(ENOMEM)); 2784 } 2785 dcp->dc_tq = tq; 2786 2787 /* dcp will be freed by task */ 2788 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2789 2790 /* 2791 * PORTING: this code relies on the property of taskq_wait to wait 2792 * until no more tasks are queued and no more tasks are active. As 2793 * we always queue new tasks from within other tasks, task_wait 2794 * reliably waits for the full recursion to finish, even though we 2795 * enqueue new tasks after taskq_wait has been called. 2796 * On platforms other than illumos, taskq_wait may not have this 2797 * property. 2798 */ 2799 taskq_wait(tq); 2800 taskq_destroy(tq); 2801 mutex_destroy(&err_lock); 2802 2803 return (error); 2804 } 2805 2806 /* 2807 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2808 * The dp_config_rwlock must not be held when this is called, and it 2809 * will not be held when the callback is called. 2810 * Therefore this function should only be used when the pool is not changing 2811 * (e.g. in syncing context), or the callback can deal with the possible races. 2812 */ 2813 static int 2814 dmu_objset_find_impl(spa_t *spa, const char *name, 2815 int func(const char *, void *), void *arg, int flags) 2816 { 2817 dsl_dir_t *dd; 2818 dsl_pool_t *dp = spa_get_dsl(spa); 2819 dsl_dataset_t *ds; 2820 zap_cursor_t zc; 2821 zap_attribute_t *attr; 2822 char *child; 2823 uint64_t thisobj; 2824 int err; 2825 2826 dsl_pool_config_enter(dp, FTAG); 2827 2828 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2829 if (err != 0) { 2830 dsl_pool_config_exit(dp, FTAG); 2831 return (err); 2832 } 2833 2834 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2835 if (dd->dd_myname[0] == '$') { 2836 dsl_dir_rele(dd, FTAG); 2837 dsl_pool_config_exit(dp, FTAG); 2838 return (0); 2839 } 2840 2841 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2842 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2843 2844 /* 2845 * Iterate over all children. 2846 */ 2847 if (flags & DS_FIND_CHILDREN) { 2848 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2849 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2850 zap_cursor_retrieve(&zc, attr) == 0; 2851 (void) zap_cursor_advance(&zc)) { 2852 ASSERT3U(attr->za_integer_length, ==, 2853 sizeof (uint64_t)); 2854 ASSERT3U(attr->za_num_integers, ==, 1); 2855 2856 child = kmem_asprintf("%s/%s", name, attr->za_name); 2857 dsl_pool_config_exit(dp, FTAG); 2858 err = dmu_objset_find_impl(spa, child, 2859 func, arg, flags); 2860 dsl_pool_config_enter(dp, FTAG); 2861 kmem_strfree(child); 2862 if (err != 0) 2863 break; 2864 } 2865 zap_cursor_fini(&zc); 2866 2867 if (err != 0) { 2868 dsl_dir_rele(dd, FTAG); 2869 dsl_pool_config_exit(dp, FTAG); 2870 kmem_free(attr, sizeof (zap_attribute_t)); 2871 return (err); 2872 } 2873 } 2874 2875 /* 2876 * Iterate over all snapshots. 2877 */ 2878 if (flags & DS_FIND_SNAPSHOTS) { 2879 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2880 2881 if (err == 0) { 2882 uint64_t snapobj; 2883 2884 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2885 dsl_dataset_rele(ds, FTAG); 2886 2887 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2888 zap_cursor_retrieve(&zc, attr) == 0; 2889 (void) zap_cursor_advance(&zc)) { 2890 ASSERT3U(attr->za_integer_length, ==, 2891 sizeof (uint64_t)); 2892 ASSERT3U(attr->za_num_integers, ==, 1); 2893 2894 child = kmem_asprintf("%s@%s", 2895 name, attr->za_name); 2896 dsl_pool_config_exit(dp, FTAG); 2897 err = func(child, arg); 2898 dsl_pool_config_enter(dp, FTAG); 2899 kmem_strfree(child); 2900 if (err != 0) 2901 break; 2902 } 2903 zap_cursor_fini(&zc); 2904 } 2905 } 2906 2907 dsl_dir_rele(dd, FTAG); 2908 kmem_free(attr, sizeof (zap_attribute_t)); 2909 dsl_pool_config_exit(dp, FTAG); 2910 2911 if (err != 0) 2912 return (err); 2913 2914 /* Apply to self. */ 2915 return (func(name, arg)); 2916 } 2917 2918 /* 2919 * See comment above dmu_objset_find_impl(). 2920 */ 2921 int 2922 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2923 int flags) 2924 { 2925 spa_t *spa; 2926 int error; 2927 2928 error = spa_open(name, &spa, FTAG); 2929 if (error != 0) 2930 return (error); 2931 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2932 spa_close(spa, FTAG); 2933 return (error); 2934 } 2935 2936 boolean_t 2937 dmu_objset_incompatible_encryption_version(objset_t *os) 2938 { 2939 return (dsl_dir_incompatible_encryption_version( 2940 os->os_dsl_dataset->ds_dir)); 2941 } 2942 2943 void 2944 dmu_objset_set_user(objset_t *os, void *user_ptr) 2945 { 2946 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2947 os->os_user_ptr = user_ptr; 2948 } 2949 2950 void * 2951 dmu_objset_get_user(objset_t *os) 2952 { 2953 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2954 return (os->os_user_ptr); 2955 } 2956 2957 /* 2958 * Determine name of filesystem, given name of snapshot. 2959 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 2960 */ 2961 int 2962 dmu_fsname(const char *snapname, char *buf) 2963 { 2964 char *atp = strchr(snapname, '@'); 2965 if (atp == NULL) 2966 return (SET_ERROR(EINVAL)); 2967 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 2968 return (SET_ERROR(ENAMETOOLONG)); 2969 (void) strlcpy(buf, snapname, atp - snapname + 1); 2970 return (0); 2971 } 2972 2973 /* 2974 * Call when we think we're going to write/free space in open context 2975 * to track the amount of dirty data in the open txg, which is also the 2976 * amount of memory that can not be evicted until this txg syncs. 2977 * 2978 * Note that there are two conditions where this can be called from 2979 * syncing context: 2980 * 2981 * [1] When we just created the dataset, in which case we go on with 2982 * updating any accounting of dirty data as usual. 2983 * [2] When we are dirtying MOS data, in which case we only update the 2984 * pool's accounting of dirty data. 2985 */ 2986 void 2987 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 2988 { 2989 dsl_dataset_t *ds = os->os_dsl_dataset; 2990 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 2991 2992 if (ds != NULL) { 2993 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 2994 } 2995 2996 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 2997 } 2998 2999 #if defined(_KERNEL) 3000 EXPORT_SYMBOL(dmu_objset_zil); 3001 EXPORT_SYMBOL(dmu_objset_pool); 3002 EXPORT_SYMBOL(dmu_objset_ds); 3003 EXPORT_SYMBOL(dmu_objset_type); 3004 EXPORT_SYMBOL(dmu_objset_name); 3005 EXPORT_SYMBOL(dmu_objset_hold); 3006 EXPORT_SYMBOL(dmu_objset_hold_flags); 3007 EXPORT_SYMBOL(dmu_objset_own); 3008 EXPORT_SYMBOL(dmu_objset_rele); 3009 EXPORT_SYMBOL(dmu_objset_rele_flags); 3010 EXPORT_SYMBOL(dmu_objset_disown); 3011 EXPORT_SYMBOL(dmu_objset_from_ds); 3012 EXPORT_SYMBOL(dmu_objset_create); 3013 EXPORT_SYMBOL(dmu_objset_clone); 3014 EXPORT_SYMBOL(dmu_objset_stats); 3015 EXPORT_SYMBOL(dmu_objset_fast_stat); 3016 EXPORT_SYMBOL(dmu_objset_spa); 3017 EXPORT_SYMBOL(dmu_objset_space); 3018 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3019 EXPORT_SYMBOL(dmu_objset_find); 3020 EXPORT_SYMBOL(dmu_objset_byteswap); 3021 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3022 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3023 EXPORT_SYMBOL(dmu_objset_dnodesize); 3024 3025 EXPORT_SYMBOL(dmu_objset_sync); 3026 EXPORT_SYMBOL(dmu_objset_is_dirty); 3027 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3028 EXPORT_SYMBOL(dmu_objset_create_impl); 3029 EXPORT_SYMBOL(dmu_objset_open_impl); 3030 EXPORT_SYMBOL(dmu_objset_evict); 3031 EXPORT_SYMBOL(dmu_objset_register_type); 3032 EXPORT_SYMBOL(dmu_objset_sync_done); 3033 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3034 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3035 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3036 EXPORT_SYMBOL(dmu_objset_userspace_present); 3037 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3038 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3039 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3040 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3041 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3042 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3043 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3044 #endif 3045