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 multilist_create(&os->os_dirty_dnodes[i], 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 spa_evicting_os_deregister(os->os_spa, os); 1001 kmem_free(os, sizeof (objset_t)); 1002 } 1003 1004 inode_timespec_t 1005 dmu_objset_snap_cmtime(objset_t *os) 1006 { 1007 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1008 } 1009 1010 objset_t * 1011 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1012 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1013 { 1014 objset_t *os; 1015 dnode_t *mdn; 1016 1017 ASSERT(dmu_tx_is_syncing(tx)); 1018 1019 if (blksz == 0) 1020 blksz = DNODE_BLOCK_SIZE; 1021 if (ibs == 0) 1022 ibs = DN_MAX_INDBLKSHIFT; 1023 1024 if (ds != NULL) 1025 VERIFY0(dmu_objset_from_ds(ds, &os)); 1026 else 1027 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1028 1029 mdn = DMU_META_DNODE(os); 1030 1031 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1032 DNODE_MIN_SLOTS, tx); 1033 1034 /* 1035 * We don't want to have to increase the meta-dnode's nlevels 1036 * later, because then we could do it in quiescing context while 1037 * we are also accessing it in open context. 1038 * 1039 * This precaution is not necessary for the MOS (ds == NULL), 1040 * because the MOS is only updated in syncing context. 1041 * This is most fortunate: the MOS is the only objset that 1042 * needs to be synced multiple times as spa_sync() iterates 1043 * to convergence, so minimizing its dn_nlevels matters. 1044 */ 1045 if (ds != NULL) { 1046 if (levels == 0) { 1047 levels = 1; 1048 1049 /* 1050 * Determine the number of levels necessary for the 1051 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1052 * that in order to ensure that we do not overflow 1053 * 64 bits, there has to be a nlevels that gives us a 1054 * number of blocks > DN_MAX_OBJECT but < 2^64. 1055 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1056 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1057 * (16). 1058 */ 1059 while ((uint64_t)mdn->dn_nblkptr << 1060 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1061 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1062 DN_MAX_OBJECT) 1063 levels++; 1064 } 1065 1066 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1067 mdn->dn_nlevels = levels; 1068 } 1069 1070 ASSERT(type != DMU_OST_NONE); 1071 ASSERT(type != DMU_OST_ANY); 1072 ASSERT(type < DMU_OST_NUMTYPES); 1073 os->os_phys->os_type = type; 1074 1075 /* 1076 * Enable user accounting if it is enabled and this is not an 1077 * encrypted receive. 1078 */ 1079 if (dmu_objset_userused_enabled(os) && 1080 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1081 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1082 if (dmu_objset_userobjused_enabled(os)) { 1083 ds->ds_feature_activation[ 1084 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1085 os->os_phys->os_flags |= 1086 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1087 } 1088 if (dmu_objset_projectquota_enabled(os)) { 1089 ds->ds_feature_activation[ 1090 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1091 os->os_phys->os_flags |= 1092 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1093 } 1094 os->os_flags = os->os_phys->os_flags; 1095 } 1096 1097 dsl_dataset_dirty(ds, tx); 1098 1099 return (os); 1100 } 1101 1102 /* called from dsl for meta-objset */ 1103 objset_t * 1104 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1105 dmu_objset_type_t type, dmu_tx_t *tx) 1106 { 1107 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1108 } 1109 1110 typedef struct dmu_objset_create_arg { 1111 const char *doca_name; 1112 cred_t *doca_cred; 1113 proc_t *doca_proc; 1114 void (*doca_userfunc)(objset_t *os, void *arg, 1115 cred_t *cr, dmu_tx_t *tx); 1116 void *doca_userarg; 1117 dmu_objset_type_t doca_type; 1118 uint64_t doca_flags; 1119 dsl_crypto_params_t *doca_dcp; 1120 } dmu_objset_create_arg_t; 1121 1122 /*ARGSUSED*/ 1123 static int 1124 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1125 { 1126 dmu_objset_create_arg_t *doca = arg; 1127 dsl_pool_t *dp = dmu_tx_pool(tx); 1128 dsl_dir_t *pdd; 1129 dsl_dataset_t *parentds; 1130 objset_t *parentos; 1131 const char *tail; 1132 int error; 1133 1134 if (strchr(doca->doca_name, '@') != NULL) 1135 return (SET_ERROR(EINVAL)); 1136 1137 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1138 return (SET_ERROR(ENAMETOOLONG)); 1139 1140 if (dataset_nestcheck(doca->doca_name) != 0) 1141 return (SET_ERROR(ENAMETOOLONG)); 1142 1143 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1144 if (error != 0) 1145 return (error); 1146 if (tail == NULL) { 1147 dsl_dir_rele(pdd, FTAG); 1148 return (SET_ERROR(EEXIST)); 1149 } 1150 1151 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1152 if (error != 0) { 1153 dsl_dir_rele(pdd, FTAG); 1154 return (error); 1155 } 1156 1157 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1158 doca->doca_cred, doca->doca_proc); 1159 if (error != 0) { 1160 dsl_dir_rele(pdd, FTAG); 1161 return (error); 1162 } 1163 1164 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1165 error = dsl_dataset_hold_obj(pdd->dd_pool, 1166 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1167 if (error != 0) { 1168 dsl_dir_rele(pdd, FTAG); 1169 return (error); 1170 } 1171 error = dmu_objset_from_ds(parentds, &parentos); 1172 if (error != 0) { 1173 dsl_dataset_rele(parentds, FTAG); 1174 dsl_dir_rele(pdd, FTAG); 1175 return (error); 1176 } 1177 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1178 dsl_dataset_rele(parentds, FTAG); 1179 dsl_dir_rele(pdd, FTAG); 1180 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1181 } 1182 dsl_dataset_rele(parentds, FTAG); 1183 dsl_dir_rele(pdd, FTAG); 1184 1185 return (error); 1186 } 1187 1188 static void 1189 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1190 { 1191 dmu_objset_create_arg_t *doca = arg; 1192 dsl_pool_t *dp = dmu_tx_pool(tx); 1193 spa_t *spa = dp->dp_spa; 1194 dsl_dir_t *pdd; 1195 const char *tail; 1196 dsl_dataset_t *ds; 1197 uint64_t obj; 1198 blkptr_t *bp; 1199 objset_t *os; 1200 zio_t *rzio; 1201 1202 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1203 1204 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1205 doca->doca_cred, doca->doca_dcp, tx); 1206 1207 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1208 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1209 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1210 bp = dsl_dataset_get_blkptr(ds); 1211 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1212 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1213 1214 if (doca->doca_userfunc != NULL) { 1215 doca->doca_userfunc(os, doca->doca_userarg, 1216 doca->doca_cred, tx); 1217 } 1218 1219 /* 1220 * The doca_userfunc() may write out some data that needs to be 1221 * encrypted if the dataset is encrypted (specifically the root 1222 * directory). This data must be written out before the encryption 1223 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1224 * I/O to occur immediately by invoking the relevant sections of 1225 * dsl_pool_sync(). 1226 */ 1227 if (os->os_encrypted) { 1228 dsl_dataset_t *tmpds = NULL; 1229 boolean_t need_sync_done = B_FALSE; 1230 1231 mutex_enter(&ds->ds_lock); 1232 ds->ds_owner = FTAG; 1233 mutex_exit(&ds->ds_lock); 1234 1235 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1236 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1237 tx->tx_txg); 1238 if (tmpds != NULL) { 1239 dsl_dataset_sync(ds, rzio, tx); 1240 need_sync_done = B_TRUE; 1241 } 1242 VERIFY0(zio_wait(rzio)); 1243 1244 dmu_objset_sync_done(os, tx); 1245 taskq_wait(dp->dp_sync_taskq); 1246 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1247 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1248 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1249 } 1250 1251 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1252 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1253 tx->tx_txg); 1254 if (tmpds != NULL) { 1255 dmu_buf_rele(ds->ds_dbuf, ds); 1256 dsl_dataset_sync(ds, rzio, tx); 1257 } 1258 VERIFY0(zio_wait(rzio)); 1259 1260 if (need_sync_done) { 1261 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1262 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1263 dsl_dataset_sync_done(ds, tx); 1264 } 1265 1266 mutex_enter(&ds->ds_lock); 1267 ds->ds_owner = NULL; 1268 mutex_exit(&ds->ds_lock); 1269 } 1270 1271 spa_history_log_internal_ds(ds, "create", tx, " "); 1272 1273 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1274 dsl_dir_rele(pdd, FTAG); 1275 } 1276 1277 int 1278 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1279 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1280 { 1281 dmu_objset_create_arg_t doca; 1282 dsl_crypto_params_t tmp_dcp = { 0 }; 1283 1284 doca.doca_name = name; 1285 doca.doca_cred = CRED(); 1286 doca.doca_proc = curproc; 1287 doca.doca_flags = flags; 1288 doca.doca_userfunc = func; 1289 doca.doca_userarg = arg; 1290 doca.doca_type = type; 1291 1292 /* 1293 * Some callers (mostly for testing) do not provide a dcp on their 1294 * own but various code inside the sync task will require it to be 1295 * allocated. Rather than adding NULL checks throughout this code 1296 * or adding dummy dcp's to all of the callers we simply create a 1297 * dummy one here and use that. This zero dcp will have the same 1298 * effect as asking for inheritance of all encryption params. 1299 */ 1300 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1301 1302 int rv = dsl_sync_task(name, 1303 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1304 6, ZFS_SPACE_CHECK_NORMAL); 1305 1306 if (rv == 0) 1307 zvol_create_minor(name); 1308 return (rv); 1309 } 1310 1311 typedef struct dmu_objset_clone_arg { 1312 const char *doca_clone; 1313 const char *doca_origin; 1314 cred_t *doca_cred; 1315 proc_t *doca_proc; 1316 } dmu_objset_clone_arg_t; 1317 1318 /*ARGSUSED*/ 1319 static int 1320 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1321 { 1322 dmu_objset_clone_arg_t *doca = arg; 1323 dsl_dir_t *pdd; 1324 const char *tail; 1325 int error; 1326 dsl_dataset_t *origin; 1327 dsl_pool_t *dp = dmu_tx_pool(tx); 1328 1329 if (strchr(doca->doca_clone, '@') != NULL) 1330 return (SET_ERROR(EINVAL)); 1331 1332 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1333 return (SET_ERROR(ENAMETOOLONG)); 1334 1335 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1336 if (error != 0) 1337 return (error); 1338 if (tail == NULL) { 1339 dsl_dir_rele(pdd, FTAG); 1340 return (SET_ERROR(EEXIST)); 1341 } 1342 1343 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1344 doca->doca_cred, doca->doca_proc); 1345 if (error != 0) { 1346 dsl_dir_rele(pdd, FTAG); 1347 return (SET_ERROR(EDQUOT)); 1348 } 1349 1350 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1351 if (error != 0) { 1352 dsl_dir_rele(pdd, FTAG); 1353 return (error); 1354 } 1355 1356 /* You can only clone snapshots, not the head datasets. */ 1357 if (!origin->ds_is_snapshot) { 1358 dsl_dataset_rele(origin, FTAG); 1359 dsl_dir_rele(pdd, FTAG); 1360 return (SET_ERROR(EINVAL)); 1361 } 1362 1363 dsl_dataset_rele(origin, FTAG); 1364 dsl_dir_rele(pdd, FTAG); 1365 1366 return (0); 1367 } 1368 1369 static void 1370 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1371 { 1372 dmu_objset_clone_arg_t *doca = arg; 1373 dsl_pool_t *dp = dmu_tx_pool(tx); 1374 dsl_dir_t *pdd; 1375 const char *tail; 1376 dsl_dataset_t *origin, *ds; 1377 uint64_t obj; 1378 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1379 1380 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1381 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1382 1383 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1384 doca->doca_cred, NULL, tx); 1385 1386 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1387 dsl_dataset_name(origin, namebuf); 1388 spa_history_log_internal_ds(ds, "clone", tx, 1389 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1390 dsl_dataset_rele(ds, FTAG); 1391 dsl_dataset_rele(origin, FTAG); 1392 dsl_dir_rele(pdd, FTAG); 1393 } 1394 1395 int 1396 dmu_objset_clone(const char *clone, const char *origin) 1397 { 1398 dmu_objset_clone_arg_t doca; 1399 1400 doca.doca_clone = clone; 1401 doca.doca_origin = origin; 1402 doca.doca_cred = CRED(); 1403 doca.doca_proc = curproc; 1404 1405 int rv = dsl_sync_task(clone, 1406 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1407 6, ZFS_SPACE_CHECK_NORMAL); 1408 1409 if (rv == 0) 1410 zvol_create_minor(clone); 1411 1412 return (rv); 1413 } 1414 1415 int 1416 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1417 { 1418 int err; 1419 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1420 nvlist_t *snaps = fnvlist_alloc(); 1421 1422 fnvlist_add_boolean(snaps, longsnap); 1423 kmem_strfree(longsnap); 1424 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1425 fnvlist_free(snaps); 1426 return (err); 1427 } 1428 1429 static void 1430 dmu_objset_upgrade_task_cb(void *data) 1431 { 1432 objset_t *os = data; 1433 1434 mutex_enter(&os->os_upgrade_lock); 1435 os->os_upgrade_status = EINTR; 1436 if (!os->os_upgrade_exit) { 1437 int status; 1438 1439 mutex_exit(&os->os_upgrade_lock); 1440 1441 status = os->os_upgrade_cb(os); 1442 1443 mutex_enter(&os->os_upgrade_lock); 1444 1445 os->os_upgrade_status = status; 1446 } 1447 os->os_upgrade_exit = B_TRUE; 1448 os->os_upgrade_id = 0; 1449 mutex_exit(&os->os_upgrade_lock); 1450 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1451 } 1452 1453 static void 1454 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1455 { 1456 if (os->os_upgrade_id != 0) 1457 return; 1458 1459 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1460 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1461 1462 mutex_enter(&os->os_upgrade_lock); 1463 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1464 os->os_upgrade_exit = B_FALSE; 1465 os->os_upgrade_cb = cb; 1466 os->os_upgrade_id = taskq_dispatch( 1467 os->os_spa->spa_upgrade_taskq, 1468 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1469 if (os->os_upgrade_id == TASKQID_INVALID) { 1470 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1471 os->os_upgrade_status = ENOMEM; 1472 } 1473 } else { 1474 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1475 } 1476 mutex_exit(&os->os_upgrade_lock); 1477 } 1478 1479 static void 1480 dmu_objset_upgrade_stop(objset_t *os) 1481 { 1482 mutex_enter(&os->os_upgrade_lock); 1483 os->os_upgrade_exit = B_TRUE; 1484 if (os->os_upgrade_id != 0) { 1485 taskqid_t id = os->os_upgrade_id; 1486 1487 os->os_upgrade_id = 0; 1488 mutex_exit(&os->os_upgrade_lock); 1489 1490 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1491 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1492 } 1493 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1494 } else { 1495 mutex_exit(&os->os_upgrade_lock); 1496 } 1497 } 1498 1499 static void 1500 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1501 { 1502 dnode_t *dn; 1503 1504 while ((dn = multilist_sublist_head(list)) != NULL) { 1505 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1506 ASSERT(dn->dn_dbuf->db_data_pending); 1507 /* 1508 * Initialize dn_zio outside dnode_sync() because the 1509 * meta-dnode needs to set it outside dnode_sync(). 1510 */ 1511 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1512 ASSERT(dn->dn_zio); 1513 1514 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1515 multilist_sublist_remove(list, dn); 1516 1517 /* 1518 * See the comment above dnode_rele_task() for an explanation 1519 * of why this dnode hold is always needed (even when not 1520 * doing user accounting). 1521 */ 1522 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1523 (void) dnode_add_ref(dn, newlist); 1524 multilist_insert(newlist, dn); 1525 1526 dnode_sync(dn, tx); 1527 } 1528 } 1529 1530 /* ARGSUSED */ 1531 static void 1532 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1533 { 1534 blkptr_t *bp = zio->io_bp; 1535 objset_t *os = arg; 1536 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1537 uint64_t fill = 0; 1538 1539 ASSERT(!BP_IS_EMBEDDED(bp)); 1540 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1541 ASSERT0(BP_GET_LEVEL(bp)); 1542 1543 /* 1544 * Update rootbp fill count: it should be the number of objects 1545 * allocated in the object set (not counting the "special" 1546 * objects that are stored in the objset_phys_t -- the meta 1547 * dnode and user/group/project accounting objects). 1548 */ 1549 for (int i = 0; i < dnp->dn_nblkptr; i++) 1550 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1551 1552 BP_SET_FILL(bp, fill); 1553 1554 if (os->os_dsl_dataset != NULL) 1555 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1556 *os->os_rootbp = *bp; 1557 if (os->os_dsl_dataset != NULL) 1558 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1559 } 1560 1561 /* ARGSUSED */ 1562 static void 1563 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1564 { 1565 blkptr_t *bp = zio->io_bp; 1566 blkptr_t *bp_orig = &zio->io_bp_orig; 1567 objset_t *os = arg; 1568 1569 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1570 ASSERT(BP_EQUAL(bp, bp_orig)); 1571 } else { 1572 dsl_dataset_t *ds = os->os_dsl_dataset; 1573 dmu_tx_t *tx = os->os_synctx; 1574 1575 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1576 dsl_dataset_block_born(ds, bp, tx); 1577 } 1578 kmem_free(bp, sizeof (*bp)); 1579 } 1580 1581 typedef struct sync_dnodes_arg { 1582 multilist_t *sda_list; 1583 int sda_sublist_idx; 1584 multilist_t *sda_newlist; 1585 dmu_tx_t *sda_tx; 1586 } sync_dnodes_arg_t; 1587 1588 static void 1589 sync_dnodes_task(void *arg) 1590 { 1591 sync_dnodes_arg_t *sda = arg; 1592 1593 multilist_sublist_t *ms = 1594 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1595 1596 dmu_objset_sync_dnodes(ms, sda->sda_tx); 1597 1598 multilist_sublist_unlock(ms); 1599 1600 kmem_free(sda, sizeof (*sda)); 1601 } 1602 1603 1604 /* called from dsl */ 1605 void 1606 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1607 { 1608 int txgoff; 1609 zbookmark_phys_t zb; 1610 zio_prop_t zp; 1611 zio_t *zio; 1612 list_t *list; 1613 dbuf_dirty_record_t *dr; 1614 int num_sublists; 1615 multilist_t *ml; 1616 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1617 *blkptr_copy = *os->os_rootbp; 1618 1619 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg); 1620 1621 ASSERT(dmu_tx_is_syncing(tx)); 1622 /* XXX the write_done callback should really give us the tx... */ 1623 os->os_synctx = tx; 1624 1625 if (os->os_dsl_dataset == NULL) { 1626 /* 1627 * This is the MOS. If we have upgraded, 1628 * spa_max_replication() could change, so reset 1629 * os_copies here. 1630 */ 1631 os->os_copies = spa_max_replication(os->os_spa); 1632 } 1633 1634 /* 1635 * Create the root block IO 1636 */ 1637 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1638 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1639 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1640 arc_release(os->os_phys_buf, &os->os_phys_buf); 1641 1642 dmu_write_policy(os, NULL, 0, 0, &zp); 1643 1644 /* 1645 * If we are either claiming the ZIL or doing a raw receive, write 1646 * out the os_phys_buf raw. Neither of these actions will effect the 1647 * MAC at this point. 1648 */ 1649 if (os->os_raw_receive || 1650 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1651 ASSERT(os->os_encrypted); 1652 arc_convert_to_raw(os->os_phys_buf, 1653 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1654 DMU_OT_OBJSET, NULL, NULL, NULL); 1655 } 1656 1657 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1658 blkptr_copy, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os), 1659 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done, 1660 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1661 1662 /* 1663 * Sync special dnodes - the parent IO for the sync is the root block 1664 */ 1665 DMU_META_DNODE(os)->dn_zio = zio; 1666 dnode_sync(DMU_META_DNODE(os), tx); 1667 1668 os->os_phys->os_flags = os->os_flags; 1669 1670 if (DMU_USERUSED_DNODE(os) && 1671 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1672 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1673 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1674 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1675 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1676 } 1677 1678 if (DMU_PROJECTUSED_DNODE(os) && 1679 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1680 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1681 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1682 } 1683 1684 txgoff = tx->tx_txg & TXG_MASK; 1685 1686 /* 1687 * We must create the list here because it uses the 1688 * dn_dirty_link[] of this txg. But it may already 1689 * exist because we call dsl_dataset_sync() twice per txg. 1690 */ 1691 if (os->os_synced_dnodes.ml_sublists == NULL) { 1692 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1693 offsetof(dnode_t, dn_dirty_link[txgoff]), 1694 dnode_multilist_index_func); 1695 } else { 1696 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1697 offsetof(dnode_t, dn_dirty_link[txgoff])); 1698 } 1699 1700 ml = &os->os_dirty_dnodes[txgoff]; 1701 num_sublists = multilist_get_num_sublists(ml); 1702 for (int i = 0; i < num_sublists; i++) { 1703 if (multilist_sublist_is_empty_idx(ml, i)) 1704 continue; 1705 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1706 sda->sda_list = ml; 1707 sda->sda_sublist_idx = i; 1708 sda->sda_tx = tx; 1709 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1710 sync_dnodes_task, sda, 0); 1711 /* callback frees sda */ 1712 } 1713 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1714 1715 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1716 while ((dr = list_head(list)) != NULL) { 1717 ASSERT0(dr->dr_dbuf->db_level); 1718 list_remove(list, dr); 1719 zio_nowait(dr->dr_zio); 1720 } 1721 1722 /* Enable dnode backfill if enough objects have been freed. */ 1723 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1724 os->os_rescan_dnodes = B_TRUE; 1725 os->os_freed_dnodes = 0; 1726 } 1727 1728 /* 1729 * Free intent log blocks up to this tx. 1730 */ 1731 zil_sync(os->os_zil, tx); 1732 os->os_phys->os_zil_header = os->os_zil_header; 1733 zio_nowait(zio); 1734 } 1735 1736 boolean_t 1737 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1738 { 1739 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1740 } 1741 1742 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1743 1744 void 1745 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1746 { 1747 file_cbs[ost] = cb; 1748 } 1749 1750 int 1751 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1752 zfs_file_info_t *zfi) 1753 { 1754 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1755 if (cb == NULL) 1756 return (EINVAL); 1757 return (cb(bonustype, data, zfi)); 1758 } 1759 1760 boolean_t 1761 dmu_objset_userused_enabled(objset_t *os) 1762 { 1763 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1764 file_cbs[os->os_phys->os_type] != NULL && 1765 DMU_USERUSED_DNODE(os) != NULL); 1766 } 1767 1768 boolean_t 1769 dmu_objset_userobjused_enabled(objset_t *os) 1770 { 1771 return (dmu_objset_userused_enabled(os) && 1772 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1773 } 1774 1775 boolean_t 1776 dmu_objset_projectquota_enabled(objset_t *os) 1777 { 1778 return (file_cbs[os->os_phys->os_type] != NULL && 1779 DMU_PROJECTUSED_DNODE(os) != NULL && 1780 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1781 } 1782 1783 typedef struct userquota_node { 1784 /* must be in the first filed, see userquota_update_cache() */ 1785 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1786 int64_t uqn_delta; 1787 avl_node_t uqn_node; 1788 } userquota_node_t; 1789 1790 typedef struct userquota_cache { 1791 avl_tree_t uqc_user_deltas; 1792 avl_tree_t uqc_group_deltas; 1793 avl_tree_t uqc_project_deltas; 1794 } userquota_cache_t; 1795 1796 static int 1797 userquota_compare(const void *l, const void *r) 1798 { 1799 const userquota_node_t *luqn = l; 1800 const userquota_node_t *ruqn = r; 1801 int rv; 1802 1803 /* 1804 * NB: can only access uqn_id because userquota_update_cache() doesn't 1805 * pass in an entire userquota_node_t. 1806 */ 1807 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1808 1809 return (TREE_ISIGN(rv)); 1810 } 1811 1812 static void 1813 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1814 { 1815 void *cookie; 1816 userquota_node_t *uqn; 1817 1818 ASSERT(dmu_tx_is_syncing(tx)); 1819 1820 cookie = NULL; 1821 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1822 &cookie)) != NULL) { 1823 /* 1824 * os_userused_lock protects against concurrent calls to 1825 * zap_increment_int(). It's needed because zap_increment_int() 1826 * is not thread-safe (i.e. not atomic). 1827 */ 1828 mutex_enter(&os->os_userused_lock); 1829 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1830 uqn->uqn_id, uqn->uqn_delta, tx)); 1831 mutex_exit(&os->os_userused_lock); 1832 kmem_free(uqn, sizeof (*uqn)); 1833 } 1834 avl_destroy(&cache->uqc_user_deltas); 1835 1836 cookie = NULL; 1837 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1838 &cookie)) != NULL) { 1839 mutex_enter(&os->os_userused_lock); 1840 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1841 uqn->uqn_id, uqn->uqn_delta, tx)); 1842 mutex_exit(&os->os_userused_lock); 1843 kmem_free(uqn, sizeof (*uqn)); 1844 } 1845 avl_destroy(&cache->uqc_group_deltas); 1846 1847 if (dmu_objset_projectquota_enabled(os)) { 1848 cookie = NULL; 1849 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1850 &cookie)) != NULL) { 1851 mutex_enter(&os->os_userused_lock); 1852 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1853 uqn->uqn_id, uqn->uqn_delta, tx)); 1854 mutex_exit(&os->os_userused_lock); 1855 kmem_free(uqn, sizeof (*uqn)); 1856 } 1857 avl_destroy(&cache->uqc_project_deltas); 1858 } 1859 } 1860 1861 static void 1862 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1863 { 1864 userquota_node_t *uqn; 1865 avl_index_t idx; 1866 1867 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1868 /* 1869 * Use id directly for searching because uqn_id is the first field of 1870 * userquota_node_t and fields after uqn_id won't be accessed in 1871 * avl_find(). 1872 */ 1873 uqn = avl_find(avl, (const void *)id, &idx); 1874 if (uqn == NULL) { 1875 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1876 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1877 avl_insert(avl, uqn, idx); 1878 } 1879 uqn->uqn_delta += delta; 1880 } 1881 1882 static void 1883 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1884 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1885 boolean_t subtract) 1886 { 1887 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1888 int64_t delta = DNODE_MIN_SIZE + used; 1889 char name[20]; 1890 1891 if (subtract) 1892 delta = -delta; 1893 1894 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1895 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1896 1897 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1898 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1899 1900 if (dmu_objset_projectquota_enabled(os)) { 1901 (void) snprintf(name, sizeof (name), "%llx", 1902 (longlong_t)project); 1903 userquota_update_cache(&cache->uqc_project_deltas, 1904 name, delta); 1905 } 1906 } 1907 } 1908 1909 static void 1910 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1911 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1912 { 1913 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1914 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1915 int delta = subtract ? -1 : 1; 1916 1917 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1918 (longlong_t)user); 1919 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1920 1921 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1922 (longlong_t)group); 1923 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1924 1925 if (dmu_objset_projectquota_enabled(os)) { 1926 (void) snprintf(name, sizeof (name), 1927 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1928 userquota_update_cache(&cache->uqc_project_deltas, 1929 name, delta); 1930 } 1931 } 1932 } 1933 1934 typedef struct userquota_updates_arg { 1935 objset_t *uua_os; 1936 int uua_sublist_idx; 1937 dmu_tx_t *uua_tx; 1938 } userquota_updates_arg_t; 1939 1940 static void 1941 userquota_updates_task(void *arg) 1942 { 1943 userquota_updates_arg_t *uua = arg; 1944 objset_t *os = uua->uua_os; 1945 dmu_tx_t *tx = uua->uua_tx; 1946 dnode_t *dn; 1947 userquota_cache_t cache = { { 0 } }; 1948 1949 multilist_sublist_t *list = 1950 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 1951 1952 ASSERT(multilist_sublist_head(list) == NULL || 1953 dmu_objset_userused_enabled(os)); 1954 avl_create(&cache.uqc_user_deltas, userquota_compare, 1955 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1956 avl_create(&cache.uqc_group_deltas, userquota_compare, 1957 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1958 if (dmu_objset_projectquota_enabled(os)) 1959 avl_create(&cache.uqc_project_deltas, userquota_compare, 1960 sizeof (userquota_node_t), offsetof(userquota_node_t, 1961 uqn_node)); 1962 1963 while ((dn = multilist_sublist_head(list)) != NULL) { 1964 int flags; 1965 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 1966 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 1967 dn->dn_phys->dn_flags & 1968 DNODE_FLAG_USERUSED_ACCOUNTED); 1969 1970 flags = dn->dn_id_flags; 1971 ASSERT(flags); 1972 if (flags & DN_ID_OLD_EXIST) { 1973 do_userquota_update(os, &cache, dn->dn_oldused, 1974 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 1975 dn->dn_oldprojid, B_TRUE); 1976 do_userobjquota_update(os, &cache, dn->dn_oldflags, 1977 dn->dn_olduid, dn->dn_oldgid, 1978 dn->dn_oldprojid, B_TRUE); 1979 } 1980 if (flags & DN_ID_NEW_EXIST) { 1981 do_userquota_update(os, &cache, 1982 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 1983 dn->dn_newuid, dn->dn_newgid, 1984 dn->dn_newprojid, B_FALSE); 1985 do_userobjquota_update(os, &cache, 1986 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 1987 dn->dn_newprojid, B_FALSE); 1988 } 1989 1990 mutex_enter(&dn->dn_mtx); 1991 dn->dn_oldused = 0; 1992 dn->dn_oldflags = 0; 1993 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 1994 dn->dn_olduid = dn->dn_newuid; 1995 dn->dn_oldgid = dn->dn_newgid; 1996 dn->dn_oldprojid = dn->dn_newprojid; 1997 dn->dn_id_flags |= DN_ID_OLD_EXIST; 1998 if (dn->dn_bonuslen == 0) 1999 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2000 else 2001 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2002 } 2003 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2004 mutex_exit(&dn->dn_mtx); 2005 2006 multilist_sublist_remove(list, dn); 2007 dnode_rele(dn, &os->os_synced_dnodes); 2008 } 2009 do_userquota_cacheflush(os, &cache, tx); 2010 multilist_sublist_unlock(list); 2011 kmem_free(uua, sizeof (*uua)); 2012 } 2013 2014 /* 2015 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2016 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2017 * evicted because the block containing the dnode can't be evicted until it is 2018 * written out. However, this hold is necessary to prevent the dnode_t from 2019 * being moved (via dnode_move()) while it's still referenced by 2020 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2021 * dirty_lightweight_leaf-type dirty records. 2022 * 2023 * If we are doing user-object accounting, the dnode_rele() happens from 2024 * userquota_updates_task() instead. 2025 */ 2026 static void 2027 dnode_rele_task(void *arg) 2028 { 2029 userquota_updates_arg_t *uua = arg; 2030 objset_t *os = uua->uua_os; 2031 2032 multilist_sublist_t *list = 2033 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2034 2035 dnode_t *dn; 2036 while ((dn = multilist_sublist_head(list)) != NULL) { 2037 multilist_sublist_remove(list, dn); 2038 dnode_rele(dn, &os->os_synced_dnodes); 2039 } 2040 multilist_sublist_unlock(list); 2041 kmem_free(uua, sizeof (*uua)); 2042 } 2043 2044 /* 2045 * Return TRUE if userquota updates are needed. 2046 */ 2047 static boolean_t 2048 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2049 { 2050 if (!dmu_objset_userused_enabled(os)) 2051 return (B_FALSE); 2052 2053 /* 2054 * If this is a raw receive just return and handle accounting 2055 * later when we have the keys loaded. We also don't do user 2056 * accounting during claiming since the datasets are not owned 2057 * for the duration of claiming and this txg should only be 2058 * used for recovery. 2059 */ 2060 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2061 return (B_FALSE); 2062 2063 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2064 return (B_FALSE); 2065 2066 /* Allocate the user/group/project used objects if necessary. */ 2067 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2068 VERIFY0(zap_create_claim(os, 2069 DMU_USERUSED_OBJECT, 2070 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2071 VERIFY0(zap_create_claim(os, 2072 DMU_GROUPUSED_OBJECT, 2073 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2074 } 2075 2076 if (dmu_objset_projectquota_enabled(os) && 2077 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2078 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2079 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2080 } 2081 return (B_TRUE); 2082 } 2083 2084 /* 2085 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2086 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2087 * The caller must taskq_wait(dp_sync_taskq). 2088 */ 2089 void 2090 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2091 { 2092 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2093 2094 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2095 for (int i = 0; i < num_sublists; i++) { 2096 userquota_updates_arg_t *uua = 2097 kmem_alloc(sizeof (*uua), KM_SLEEP); 2098 uua->uua_os = os; 2099 uua->uua_sublist_idx = i; 2100 uua->uua_tx = tx; 2101 2102 /* 2103 * If we don't need to update userquotas, use 2104 * dnode_rele_task() to call dnode_rele() 2105 */ 2106 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2107 need_userquota ? userquota_updates_task : dnode_rele_task, 2108 uua, 0); 2109 /* callback frees uua */ 2110 } 2111 } 2112 2113 2114 /* 2115 * Returns a pointer to data to find uid/gid from 2116 * 2117 * If a dirty record for transaction group that is syncing can't 2118 * be found then NULL is returned. In the NULL case it is assumed 2119 * the uid/gid aren't changing. 2120 */ 2121 static void * 2122 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2123 { 2124 dbuf_dirty_record_t *dr; 2125 void *data; 2126 2127 if (db->db_dirtycnt == 0) 2128 return (db->db.db_data); /* Nothing is changing */ 2129 2130 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2131 2132 if (dr == NULL) { 2133 data = NULL; 2134 } else { 2135 if (dr->dr_dnode->dn_bonuslen == 0 && 2136 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2137 data = dr->dt.dl.dr_data->b_data; 2138 else 2139 data = dr->dt.dl.dr_data; 2140 } 2141 2142 return (data); 2143 } 2144 2145 void 2146 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2147 { 2148 objset_t *os = dn->dn_objset; 2149 void *data = NULL; 2150 dmu_buf_impl_t *db = NULL; 2151 int flags = dn->dn_id_flags; 2152 int error; 2153 boolean_t have_spill = B_FALSE; 2154 2155 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2156 return; 2157 2158 /* 2159 * Raw receives introduce a problem with user accounting. Raw 2160 * receives cannot update the user accounting info because the 2161 * user ids and the sizes are encrypted. To guarantee that we 2162 * never end up with bad user accounting, we simply disable it 2163 * during raw receives. We also disable this for normal receives 2164 * so that an incremental raw receive may be done on top of an 2165 * existing non-raw receive. 2166 */ 2167 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2168 return; 2169 2170 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2171 DN_ID_CHKED_SPILL))) 2172 return; 2173 2174 if (before && dn->dn_bonuslen != 0) 2175 data = DN_BONUS(dn->dn_phys); 2176 else if (!before && dn->dn_bonuslen != 0) { 2177 if (dn->dn_bonus) { 2178 db = dn->dn_bonus; 2179 mutex_enter(&db->db_mtx); 2180 data = dmu_objset_userquota_find_data(db, tx); 2181 } else { 2182 data = DN_BONUS(dn->dn_phys); 2183 } 2184 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2185 int rf = 0; 2186 2187 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2188 rf |= DB_RF_HAVESTRUCT; 2189 error = dmu_spill_hold_by_dnode(dn, 2190 rf | DB_RF_MUST_SUCCEED, 2191 FTAG, (dmu_buf_t **)&db); 2192 ASSERT(error == 0); 2193 mutex_enter(&db->db_mtx); 2194 data = (before) ? db->db.db_data : 2195 dmu_objset_userquota_find_data(db, tx); 2196 have_spill = B_TRUE; 2197 } else { 2198 mutex_enter(&dn->dn_mtx); 2199 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2200 mutex_exit(&dn->dn_mtx); 2201 return; 2202 } 2203 2204 /* 2205 * Must always call the callback in case the object 2206 * type has changed and that type isn't an object type to track 2207 */ 2208 zfs_file_info_t zfi; 2209 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2210 2211 if (before) { 2212 ASSERT(data); 2213 dn->dn_olduid = zfi.zfi_user; 2214 dn->dn_oldgid = zfi.zfi_group; 2215 dn->dn_oldprojid = zfi.zfi_project; 2216 } else if (data) { 2217 dn->dn_newuid = zfi.zfi_user; 2218 dn->dn_newgid = zfi.zfi_group; 2219 dn->dn_newprojid = zfi.zfi_project; 2220 } 2221 2222 /* 2223 * Preserve existing uid/gid when the callback can't determine 2224 * what the new uid/gid are and the callback returned EEXIST. 2225 * The EEXIST error tells us to just use the existing uid/gid. 2226 * If we don't know what the old values are then just assign 2227 * them to 0, since that is a new file being created. 2228 */ 2229 if (!before && data == NULL && error == EEXIST) { 2230 if (flags & DN_ID_OLD_EXIST) { 2231 dn->dn_newuid = dn->dn_olduid; 2232 dn->dn_newgid = dn->dn_oldgid; 2233 dn->dn_newprojid = dn->dn_oldprojid; 2234 } else { 2235 dn->dn_newuid = 0; 2236 dn->dn_newgid = 0; 2237 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2238 } 2239 error = 0; 2240 } 2241 2242 if (db) 2243 mutex_exit(&db->db_mtx); 2244 2245 mutex_enter(&dn->dn_mtx); 2246 if (error == 0 && before) 2247 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2248 if (error == 0 && !before) 2249 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2250 2251 if (have_spill) { 2252 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2253 } else { 2254 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2255 } 2256 mutex_exit(&dn->dn_mtx); 2257 if (have_spill) 2258 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2259 } 2260 2261 boolean_t 2262 dmu_objset_userspace_present(objset_t *os) 2263 { 2264 return (os->os_phys->os_flags & 2265 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2266 } 2267 2268 boolean_t 2269 dmu_objset_userobjspace_present(objset_t *os) 2270 { 2271 return (os->os_phys->os_flags & 2272 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2273 } 2274 2275 boolean_t 2276 dmu_objset_projectquota_present(objset_t *os) 2277 { 2278 return (os->os_phys->os_flags & 2279 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2280 } 2281 2282 static int 2283 dmu_objset_space_upgrade(objset_t *os) 2284 { 2285 uint64_t obj; 2286 int err = 0; 2287 2288 /* 2289 * We simply need to mark every object dirty, so that it will be 2290 * synced out and now accounted. If this is called 2291 * concurrently, or if we already did some work before crashing, 2292 * that's fine, since we track each object's accounted state 2293 * independently. 2294 */ 2295 2296 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2297 dmu_tx_t *tx; 2298 dmu_buf_t *db; 2299 int objerr; 2300 2301 mutex_enter(&os->os_upgrade_lock); 2302 if (os->os_upgrade_exit) 2303 err = SET_ERROR(EINTR); 2304 mutex_exit(&os->os_upgrade_lock); 2305 if (err != 0) 2306 return (err); 2307 2308 if (issig(JUSTLOOKING) && issig(FORREAL)) 2309 return (SET_ERROR(EINTR)); 2310 2311 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2312 if (objerr != 0) 2313 continue; 2314 tx = dmu_tx_create(os); 2315 dmu_tx_hold_bonus(tx, obj); 2316 objerr = dmu_tx_assign(tx, TXG_WAIT); 2317 if (objerr != 0) { 2318 dmu_buf_rele(db, FTAG); 2319 dmu_tx_abort(tx); 2320 continue; 2321 } 2322 dmu_buf_will_dirty(db, tx); 2323 dmu_buf_rele(db, FTAG); 2324 dmu_tx_commit(tx); 2325 } 2326 return (0); 2327 } 2328 2329 static int 2330 dmu_objset_userspace_upgrade_cb(objset_t *os) 2331 { 2332 int err = 0; 2333 2334 if (dmu_objset_userspace_present(os)) 2335 return (0); 2336 if (dmu_objset_is_snapshot(os)) 2337 return (SET_ERROR(EINVAL)); 2338 if (!dmu_objset_userused_enabled(os)) 2339 return (SET_ERROR(ENOTSUP)); 2340 2341 err = dmu_objset_space_upgrade(os); 2342 if (err) 2343 return (err); 2344 2345 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2346 txg_wait_synced(dmu_objset_pool(os), 0); 2347 return (0); 2348 } 2349 2350 void 2351 dmu_objset_userspace_upgrade(objset_t *os) 2352 { 2353 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2354 } 2355 2356 static int 2357 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2358 { 2359 int err = 0; 2360 2361 if (dmu_objset_userobjspace_present(os) && 2362 dmu_objset_projectquota_present(os)) 2363 return (0); 2364 if (dmu_objset_is_snapshot(os)) 2365 return (SET_ERROR(EINVAL)); 2366 if (!dmu_objset_userused_enabled(os)) 2367 return (SET_ERROR(ENOTSUP)); 2368 if (!dmu_objset_projectquota_enabled(os) && 2369 dmu_objset_userobjspace_present(os)) 2370 return (SET_ERROR(ENOTSUP)); 2371 2372 if (dmu_objset_userobjused_enabled(os)) 2373 dmu_objset_ds(os)->ds_feature_activation[ 2374 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2375 if (dmu_objset_projectquota_enabled(os)) 2376 dmu_objset_ds(os)->ds_feature_activation[ 2377 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2378 2379 err = dmu_objset_space_upgrade(os); 2380 if (err) 2381 return (err); 2382 2383 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2384 if (dmu_objset_userobjused_enabled(os)) 2385 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2386 if (dmu_objset_projectquota_enabled(os)) 2387 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2388 2389 txg_wait_synced(dmu_objset_pool(os), 0); 2390 return (0); 2391 } 2392 2393 void 2394 dmu_objset_id_quota_upgrade(objset_t *os) 2395 { 2396 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2397 } 2398 2399 boolean_t 2400 dmu_objset_userobjspace_upgradable(objset_t *os) 2401 { 2402 return (dmu_objset_type(os) == DMU_OST_ZFS && 2403 !dmu_objset_is_snapshot(os) && 2404 dmu_objset_userobjused_enabled(os) && 2405 !dmu_objset_userobjspace_present(os) && 2406 spa_writeable(dmu_objset_spa(os))); 2407 } 2408 2409 boolean_t 2410 dmu_objset_projectquota_upgradable(objset_t *os) 2411 { 2412 return (dmu_objset_type(os) == DMU_OST_ZFS && 2413 !dmu_objset_is_snapshot(os) && 2414 dmu_objset_projectquota_enabled(os) && 2415 !dmu_objset_projectquota_present(os) && 2416 spa_writeable(dmu_objset_spa(os))); 2417 } 2418 2419 void 2420 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2421 uint64_t *usedobjsp, uint64_t *availobjsp) 2422 { 2423 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2424 usedobjsp, availobjsp); 2425 } 2426 2427 uint64_t 2428 dmu_objset_fsid_guid(objset_t *os) 2429 { 2430 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2431 } 2432 2433 void 2434 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2435 { 2436 stat->dds_type = os->os_phys->os_type; 2437 if (os->os_dsl_dataset) 2438 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2439 } 2440 2441 void 2442 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2443 { 2444 ASSERT(os->os_dsl_dataset || 2445 os->os_phys->os_type == DMU_OST_META); 2446 2447 if (os->os_dsl_dataset != NULL) 2448 dsl_dataset_stats(os->os_dsl_dataset, nv); 2449 2450 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2451 os->os_phys->os_type); 2452 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2453 dmu_objset_userspace_present(os)); 2454 } 2455 2456 int 2457 dmu_objset_is_snapshot(objset_t *os) 2458 { 2459 if (os->os_dsl_dataset != NULL) 2460 return (os->os_dsl_dataset->ds_is_snapshot); 2461 else 2462 return (B_FALSE); 2463 } 2464 2465 int 2466 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2467 boolean_t *conflict) 2468 { 2469 dsl_dataset_t *ds = os->os_dsl_dataset; 2470 uint64_t ignored; 2471 2472 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2473 return (SET_ERROR(ENOENT)); 2474 2475 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2476 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2477 MT_NORMALIZE, real, maxlen, conflict)); 2478 } 2479 2480 int 2481 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2482 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2483 { 2484 dsl_dataset_t *ds = os->os_dsl_dataset; 2485 zap_cursor_t cursor; 2486 zap_attribute_t attr; 2487 2488 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2489 2490 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2491 return (SET_ERROR(ENOENT)); 2492 2493 zap_cursor_init_serialized(&cursor, 2494 ds->ds_dir->dd_pool->dp_meta_objset, 2495 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2496 2497 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2498 zap_cursor_fini(&cursor); 2499 return (SET_ERROR(ENOENT)); 2500 } 2501 2502 if (strlen(attr.za_name) + 1 > namelen) { 2503 zap_cursor_fini(&cursor); 2504 return (SET_ERROR(ENAMETOOLONG)); 2505 } 2506 2507 (void) strlcpy(name, attr.za_name, namelen); 2508 if (idp) 2509 *idp = attr.za_first_integer; 2510 if (case_conflict) 2511 *case_conflict = attr.za_normalization_conflict; 2512 zap_cursor_advance(&cursor); 2513 *offp = zap_cursor_serialize(&cursor); 2514 zap_cursor_fini(&cursor); 2515 2516 return (0); 2517 } 2518 2519 int 2520 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2521 { 2522 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2523 } 2524 2525 int 2526 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2527 uint64_t *idp, uint64_t *offp) 2528 { 2529 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2530 zap_cursor_t cursor; 2531 zap_attribute_t attr; 2532 2533 /* there is no next dir on a snapshot! */ 2534 if (os->os_dsl_dataset->ds_object != 2535 dsl_dir_phys(dd)->dd_head_dataset_obj) 2536 return (SET_ERROR(ENOENT)); 2537 2538 zap_cursor_init_serialized(&cursor, 2539 dd->dd_pool->dp_meta_objset, 2540 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2541 2542 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2543 zap_cursor_fini(&cursor); 2544 return (SET_ERROR(ENOENT)); 2545 } 2546 2547 if (strlen(attr.za_name) + 1 > namelen) { 2548 zap_cursor_fini(&cursor); 2549 return (SET_ERROR(ENAMETOOLONG)); 2550 } 2551 2552 (void) strlcpy(name, attr.za_name, namelen); 2553 if (idp) 2554 *idp = attr.za_first_integer; 2555 zap_cursor_advance(&cursor); 2556 *offp = zap_cursor_serialize(&cursor); 2557 zap_cursor_fini(&cursor); 2558 2559 return (0); 2560 } 2561 2562 typedef struct dmu_objset_find_ctx { 2563 taskq_t *dc_tq; 2564 dsl_pool_t *dc_dp; 2565 uint64_t dc_ddobj; 2566 char *dc_ddname; /* last component of ddobj's name */ 2567 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2568 void *dc_arg; 2569 int dc_flags; 2570 kmutex_t *dc_error_lock; 2571 int *dc_error; 2572 } dmu_objset_find_ctx_t; 2573 2574 static void 2575 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2576 { 2577 dsl_pool_t *dp = dcp->dc_dp; 2578 dsl_dir_t *dd; 2579 dsl_dataset_t *ds; 2580 zap_cursor_t zc; 2581 zap_attribute_t *attr; 2582 uint64_t thisobj; 2583 int err = 0; 2584 2585 /* don't process if there already was an error */ 2586 if (*dcp->dc_error != 0) 2587 goto out; 2588 2589 /* 2590 * Note: passing the name (dc_ddname) here is optional, but it 2591 * improves performance because we don't need to call 2592 * zap_value_search() to determine the name. 2593 */ 2594 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2595 if (err != 0) 2596 goto out; 2597 2598 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2599 if (dd->dd_myname[0] == '$') { 2600 dsl_dir_rele(dd, FTAG); 2601 goto out; 2602 } 2603 2604 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2605 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2606 2607 /* 2608 * Iterate over all children. 2609 */ 2610 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2611 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2612 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2613 zap_cursor_retrieve(&zc, attr) == 0; 2614 (void) zap_cursor_advance(&zc)) { 2615 ASSERT3U(attr->za_integer_length, ==, 2616 sizeof (uint64_t)); 2617 ASSERT3U(attr->za_num_integers, ==, 1); 2618 2619 dmu_objset_find_ctx_t *child_dcp = 2620 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2621 *child_dcp = *dcp; 2622 child_dcp->dc_ddobj = attr->za_first_integer; 2623 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2624 if (dcp->dc_tq != NULL) 2625 (void) taskq_dispatch(dcp->dc_tq, 2626 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2627 else 2628 dmu_objset_find_dp_impl(child_dcp); 2629 } 2630 zap_cursor_fini(&zc); 2631 } 2632 2633 /* 2634 * Iterate over all snapshots. 2635 */ 2636 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2637 dsl_dataset_t *ds; 2638 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2639 2640 if (err == 0) { 2641 uint64_t snapobj; 2642 2643 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2644 dsl_dataset_rele(ds, FTAG); 2645 2646 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2647 zap_cursor_retrieve(&zc, attr) == 0; 2648 (void) zap_cursor_advance(&zc)) { 2649 ASSERT3U(attr->za_integer_length, ==, 2650 sizeof (uint64_t)); 2651 ASSERT3U(attr->za_num_integers, ==, 1); 2652 2653 err = dsl_dataset_hold_obj(dp, 2654 attr->za_first_integer, FTAG, &ds); 2655 if (err != 0) 2656 break; 2657 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2658 dsl_dataset_rele(ds, FTAG); 2659 if (err != 0) 2660 break; 2661 } 2662 zap_cursor_fini(&zc); 2663 } 2664 } 2665 2666 kmem_free(attr, sizeof (zap_attribute_t)); 2667 2668 if (err != 0) { 2669 dsl_dir_rele(dd, FTAG); 2670 goto out; 2671 } 2672 2673 /* 2674 * Apply to self. 2675 */ 2676 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2677 2678 /* 2679 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2680 * that the dir will remain cached, and we won't have to re-instantiate 2681 * it (which could be expensive due to finding its name via 2682 * zap_value_search()). 2683 */ 2684 dsl_dir_rele(dd, FTAG); 2685 if (err != 0) 2686 goto out; 2687 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2688 dsl_dataset_rele(ds, FTAG); 2689 2690 out: 2691 if (err != 0) { 2692 mutex_enter(dcp->dc_error_lock); 2693 /* only keep first error */ 2694 if (*dcp->dc_error == 0) 2695 *dcp->dc_error = err; 2696 mutex_exit(dcp->dc_error_lock); 2697 } 2698 2699 if (dcp->dc_ddname != NULL) 2700 spa_strfree(dcp->dc_ddname); 2701 kmem_free(dcp, sizeof (*dcp)); 2702 } 2703 2704 static void 2705 dmu_objset_find_dp_cb(void *arg) 2706 { 2707 dmu_objset_find_ctx_t *dcp = arg; 2708 dsl_pool_t *dp = dcp->dc_dp; 2709 2710 /* 2711 * We need to get a pool_config_lock here, as there are several 2712 * assert(pool_config_held) down the stack. Getting a lock via 2713 * dsl_pool_config_enter is risky, as it might be stalled by a 2714 * pending writer. This would deadlock, as the write lock can 2715 * only be granted when our parent thread gives up the lock. 2716 * The _prio interface gives us priority over a pending writer. 2717 */ 2718 dsl_pool_config_enter_prio(dp, FTAG); 2719 2720 dmu_objset_find_dp_impl(dcp); 2721 2722 dsl_pool_config_exit(dp, FTAG); 2723 } 2724 2725 /* 2726 * Find objsets under and including ddobj, call func(ds) on each. 2727 * The order for the enumeration is completely undefined. 2728 * func is called with dsl_pool_config held. 2729 */ 2730 int 2731 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2732 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2733 { 2734 int error = 0; 2735 taskq_t *tq = NULL; 2736 int ntasks; 2737 dmu_objset_find_ctx_t *dcp; 2738 kmutex_t err_lock; 2739 2740 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2741 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2742 dcp->dc_tq = NULL; 2743 dcp->dc_dp = dp; 2744 dcp->dc_ddobj = ddobj; 2745 dcp->dc_ddname = NULL; 2746 dcp->dc_func = func; 2747 dcp->dc_arg = arg; 2748 dcp->dc_flags = flags; 2749 dcp->dc_error_lock = &err_lock; 2750 dcp->dc_error = &error; 2751 2752 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2753 /* 2754 * In case a write lock is held we can't make use of 2755 * parallelism, as down the stack of the worker threads 2756 * the lock is asserted via dsl_pool_config_held. 2757 * In case of a read lock this is solved by getting a read 2758 * lock in each worker thread, which isn't possible in case 2759 * of a writer lock. So we fall back to the synchronous path 2760 * here. 2761 * In the future it might be possible to get some magic into 2762 * dsl_pool_config_held in a way that it returns true for 2763 * the worker threads so that a single lock held from this 2764 * thread suffices. For now, stay single threaded. 2765 */ 2766 dmu_objset_find_dp_impl(dcp); 2767 mutex_destroy(&err_lock); 2768 2769 return (error); 2770 } 2771 2772 ntasks = dmu_find_threads; 2773 if (ntasks == 0) 2774 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2775 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2776 INT_MAX, 0); 2777 if (tq == NULL) { 2778 kmem_free(dcp, sizeof (*dcp)); 2779 mutex_destroy(&err_lock); 2780 2781 return (SET_ERROR(ENOMEM)); 2782 } 2783 dcp->dc_tq = tq; 2784 2785 /* dcp will be freed by task */ 2786 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2787 2788 /* 2789 * PORTING: this code relies on the property of taskq_wait to wait 2790 * until no more tasks are queued and no more tasks are active. As 2791 * we always queue new tasks from within other tasks, task_wait 2792 * reliably waits for the full recursion to finish, even though we 2793 * enqueue new tasks after taskq_wait has been called. 2794 * On platforms other than illumos, taskq_wait may not have this 2795 * property. 2796 */ 2797 taskq_wait(tq); 2798 taskq_destroy(tq); 2799 mutex_destroy(&err_lock); 2800 2801 return (error); 2802 } 2803 2804 /* 2805 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2806 * The dp_config_rwlock must not be held when this is called, and it 2807 * will not be held when the callback is called. 2808 * Therefore this function should only be used when the pool is not changing 2809 * (e.g. in syncing context), or the callback can deal with the possible races. 2810 */ 2811 static int 2812 dmu_objset_find_impl(spa_t *spa, const char *name, 2813 int func(const char *, void *), void *arg, int flags) 2814 { 2815 dsl_dir_t *dd; 2816 dsl_pool_t *dp = spa_get_dsl(spa); 2817 dsl_dataset_t *ds; 2818 zap_cursor_t zc; 2819 zap_attribute_t *attr; 2820 char *child; 2821 uint64_t thisobj; 2822 int err; 2823 2824 dsl_pool_config_enter(dp, FTAG); 2825 2826 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2827 if (err != 0) { 2828 dsl_pool_config_exit(dp, FTAG); 2829 return (err); 2830 } 2831 2832 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2833 if (dd->dd_myname[0] == '$') { 2834 dsl_dir_rele(dd, FTAG); 2835 dsl_pool_config_exit(dp, FTAG); 2836 return (0); 2837 } 2838 2839 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2840 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2841 2842 /* 2843 * Iterate over all children. 2844 */ 2845 if (flags & DS_FIND_CHILDREN) { 2846 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2847 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2848 zap_cursor_retrieve(&zc, attr) == 0; 2849 (void) zap_cursor_advance(&zc)) { 2850 ASSERT3U(attr->za_integer_length, ==, 2851 sizeof (uint64_t)); 2852 ASSERT3U(attr->za_num_integers, ==, 1); 2853 2854 child = kmem_asprintf("%s/%s", name, attr->za_name); 2855 dsl_pool_config_exit(dp, FTAG); 2856 err = dmu_objset_find_impl(spa, child, 2857 func, arg, flags); 2858 dsl_pool_config_enter(dp, FTAG); 2859 kmem_strfree(child); 2860 if (err != 0) 2861 break; 2862 } 2863 zap_cursor_fini(&zc); 2864 2865 if (err != 0) { 2866 dsl_dir_rele(dd, FTAG); 2867 dsl_pool_config_exit(dp, FTAG); 2868 kmem_free(attr, sizeof (zap_attribute_t)); 2869 return (err); 2870 } 2871 } 2872 2873 /* 2874 * Iterate over all snapshots. 2875 */ 2876 if (flags & DS_FIND_SNAPSHOTS) { 2877 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2878 2879 if (err == 0) { 2880 uint64_t snapobj; 2881 2882 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2883 dsl_dataset_rele(ds, FTAG); 2884 2885 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2886 zap_cursor_retrieve(&zc, attr) == 0; 2887 (void) zap_cursor_advance(&zc)) { 2888 ASSERT3U(attr->za_integer_length, ==, 2889 sizeof (uint64_t)); 2890 ASSERT3U(attr->za_num_integers, ==, 1); 2891 2892 child = kmem_asprintf("%s@%s", 2893 name, attr->za_name); 2894 dsl_pool_config_exit(dp, FTAG); 2895 err = func(child, arg); 2896 dsl_pool_config_enter(dp, FTAG); 2897 kmem_strfree(child); 2898 if (err != 0) 2899 break; 2900 } 2901 zap_cursor_fini(&zc); 2902 } 2903 } 2904 2905 dsl_dir_rele(dd, FTAG); 2906 kmem_free(attr, sizeof (zap_attribute_t)); 2907 dsl_pool_config_exit(dp, FTAG); 2908 2909 if (err != 0) 2910 return (err); 2911 2912 /* Apply to self. */ 2913 return (func(name, arg)); 2914 } 2915 2916 /* 2917 * See comment above dmu_objset_find_impl(). 2918 */ 2919 int 2920 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2921 int flags) 2922 { 2923 spa_t *spa; 2924 int error; 2925 2926 error = spa_open(name, &spa, FTAG); 2927 if (error != 0) 2928 return (error); 2929 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2930 spa_close(spa, FTAG); 2931 return (error); 2932 } 2933 2934 boolean_t 2935 dmu_objset_incompatible_encryption_version(objset_t *os) 2936 { 2937 return (dsl_dir_incompatible_encryption_version( 2938 os->os_dsl_dataset->ds_dir)); 2939 } 2940 2941 void 2942 dmu_objset_set_user(objset_t *os, void *user_ptr) 2943 { 2944 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2945 os->os_user_ptr = user_ptr; 2946 } 2947 2948 void * 2949 dmu_objset_get_user(objset_t *os) 2950 { 2951 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2952 return (os->os_user_ptr); 2953 } 2954 2955 /* 2956 * Determine name of filesystem, given name of snapshot. 2957 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 2958 */ 2959 int 2960 dmu_fsname(const char *snapname, char *buf) 2961 { 2962 char *atp = strchr(snapname, '@'); 2963 if (atp == NULL) 2964 return (SET_ERROR(EINVAL)); 2965 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 2966 return (SET_ERROR(ENAMETOOLONG)); 2967 (void) strlcpy(buf, snapname, atp - snapname + 1); 2968 return (0); 2969 } 2970 2971 /* 2972 * Call when we think we're going to write/free space in open context 2973 * to track the amount of dirty data in the open txg, which is also the 2974 * amount of memory that can not be evicted until this txg syncs. 2975 * 2976 * Note that there are two conditions where this can be called from 2977 * syncing context: 2978 * 2979 * [1] When we just created the dataset, in which case we go on with 2980 * updating any accounting of dirty data as usual. 2981 * [2] When we are dirtying MOS data, in which case we only update the 2982 * pool's accounting of dirty data. 2983 */ 2984 void 2985 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 2986 { 2987 dsl_dataset_t *ds = os->os_dsl_dataset; 2988 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 2989 2990 if (ds != NULL) { 2991 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 2992 } 2993 2994 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 2995 } 2996 2997 #if defined(_KERNEL) 2998 EXPORT_SYMBOL(dmu_objset_zil); 2999 EXPORT_SYMBOL(dmu_objset_pool); 3000 EXPORT_SYMBOL(dmu_objset_ds); 3001 EXPORT_SYMBOL(dmu_objset_type); 3002 EXPORT_SYMBOL(dmu_objset_name); 3003 EXPORT_SYMBOL(dmu_objset_hold); 3004 EXPORT_SYMBOL(dmu_objset_hold_flags); 3005 EXPORT_SYMBOL(dmu_objset_own); 3006 EXPORT_SYMBOL(dmu_objset_rele); 3007 EXPORT_SYMBOL(dmu_objset_rele_flags); 3008 EXPORT_SYMBOL(dmu_objset_disown); 3009 EXPORT_SYMBOL(dmu_objset_from_ds); 3010 EXPORT_SYMBOL(dmu_objset_create); 3011 EXPORT_SYMBOL(dmu_objset_clone); 3012 EXPORT_SYMBOL(dmu_objset_stats); 3013 EXPORT_SYMBOL(dmu_objset_fast_stat); 3014 EXPORT_SYMBOL(dmu_objset_spa); 3015 EXPORT_SYMBOL(dmu_objset_space); 3016 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3017 EXPORT_SYMBOL(dmu_objset_find); 3018 EXPORT_SYMBOL(dmu_objset_byteswap); 3019 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3020 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3021 EXPORT_SYMBOL(dmu_objset_dnodesize); 3022 3023 EXPORT_SYMBOL(dmu_objset_sync); 3024 EXPORT_SYMBOL(dmu_objset_is_dirty); 3025 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3026 EXPORT_SYMBOL(dmu_objset_create_impl); 3027 EXPORT_SYMBOL(dmu_objset_open_impl); 3028 EXPORT_SYMBOL(dmu_objset_evict); 3029 EXPORT_SYMBOL(dmu_objset_register_type); 3030 EXPORT_SYMBOL(dmu_objset_sync_done); 3031 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3032 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3033 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3034 EXPORT_SYMBOL(dmu_objset_userspace_present); 3035 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3036 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3037 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3038 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3039 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3040 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3041 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3042 #endif 3043