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; 402 403 /* 404 * The low order bits of the hash value are thought to be 405 * distributed evenly. Otherwise, in the case that the multilist 406 * has a power of two number of sublists, each sublists' usage 407 * would not be evenly distributed. In this context full 64bit 408 * division would be a waste of time, so limit it to 32 bits. 409 */ 410 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 411 multilist_get_num_sublists(ml)); 412 } 413 414 /* 415 * Instantiates the objset_t in-memory structure corresponding to the 416 * objset_phys_t that's pointed to by the specified blkptr_t. 417 */ 418 int 419 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 420 objset_t **osp) 421 { 422 objset_t *os; 423 int i, err; 424 425 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 426 ASSERT(!BP_IS_REDACTED(bp)); 427 428 /* 429 * We need the pool config lock to get properties. 430 */ 431 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 432 433 /* 434 * The $ORIGIN dataset (if it exists) doesn't have an associated 435 * objset, so there's no reason to open it. The $ORIGIN dataset 436 * will not exist on pools older than SPA_VERSION_ORIGIN. 437 */ 438 if (ds != NULL && spa_get_dsl(spa) != NULL && 439 spa_get_dsl(spa)->dp_origin_snap != NULL) { 440 ASSERT3P(ds->ds_dir, !=, 441 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 442 } 443 444 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 445 os->os_dsl_dataset = ds; 446 os->os_spa = spa; 447 os->os_rootbp = bp; 448 if (!BP_IS_HOLE(os->os_rootbp)) { 449 arc_flags_t aflags = ARC_FLAG_WAIT; 450 zbookmark_phys_t zb; 451 int size; 452 enum zio_flag zio_flags = ZIO_FLAG_CANFAIL; 453 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 454 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 455 456 if (DMU_OS_IS_L2CACHEABLE(os)) 457 aflags |= ARC_FLAG_L2CACHE; 458 459 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 460 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 461 ASSERT(BP_IS_AUTHENTICATED(bp)); 462 zio_flags |= ZIO_FLAG_RAW; 463 } 464 465 dprintf_bp(os->os_rootbp, "reading %s", ""); 466 err = arc_read(NULL, spa, os->os_rootbp, 467 arc_getbuf_func, &os->os_phys_buf, 468 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 469 if (err != 0) { 470 kmem_free(os, sizeof (objset_t)); 471 /* convert checksum errors into IO errors */ 472 if (err == ECKSUM) 473 err = SET_ERROR(EIO); 474 return (err); 475 } 476 477 if (spa_version(spa) < SPA_VERSION_USERSPACE) 478 size = OBJSET_PHYS_SIZE_V1; 479 else if (!spa_feature_is_enabled(spa, 480 SPA_FEATURE_PROJECT_QUOTA)) 481 size = OBJSET_PHYS_SIZE_V2; 482 else 483 size = sizeof (objset_phys_t); 484 485 /* Increase the blocksize if we are permitted. */ 486 if (arc_buf_size(os->os_phys_buf) < size) { 487 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 488 ARC_BUFC_METADATA, size); 489 bzero(buf->b_data, size); 490 bcopy(os->os_phys_buf->b_data, buf->b_data, 491 arc_buf_size(os->os_phys_buf)); 492 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 493 os->os_phys_buf = buf; 494 } 495 496 os->os_phys = os->os_phys_buf->b_data; 497 os->os_flags = os->os_phys->os_flags; 498 } else { 499 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 500 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 501 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 502 ARC_BUFC_METADATA, size); 503 os->os_phys = os->os_phys_buf->b_data; 504 bzero(os->os_phys, size); 505 } 506 /* 507 * These properties will be filled in by the logic in zfs_get_zplprop() 508 * when they are queried for the first time. 509 */ 510 os->os_version = OBJSET_PROP_UNINITIALIZED; 511 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 512 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 513 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 514 515 /* 516 * Note: the changed_cb will be called once before the register 517 * func returns, thus changing the checksum/compression from the 518 * default (fletcher2/off). Snapshots don't need to know about 519 * checksum/compression/copies. 520 */ 521 if (ds != NULL) { 522 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 523 524 err = dsl_prop_register(ds, 525 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 526 primary_cache_changed_cb, os); 527 if (err == 0) { 528 err = dsl_prop_register(ds, 529 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 530 secondary_cache_changed_cb, os); 531 } 532 if (!ds->ds_is_snapshot) { 533 if (err == 0) { 534 err = dsl_prop_register(ds, 535 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 536 checksum_changed_cb, os); 537 } 538 if (err == 0) { 539 err = dsl_prop_register(ds, 540 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 541 compression_changed_cb, os); 542 } 543 if (err == 0) { 544 err = dsl_prop_register(ds, 545 zfs_prop_to_name(ZFS_PROP_COPIES), 546 copies_changed_cb, os); 547 } 548 if (err == 0) { 549 err = dsl_prop_register(ds, 550 zfs_prop_to_name(ZFS_PROP_DEDUP), 551 dedup_changed_cb, os); 552 } 553 if (err == 0) { 554 err = dsl_prop_register(ds, 555 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 556 logbias_changed_cb, os); 557 } 558 if (err == 0) { 559 err = dsl_prop_register(ds, 560 zfs_prop_to_name(ZFS_PROP_SYNC), 561 sync_changed_cb, os); 562 } 563 if (err == 0) { 564 err = dsl_prop_register(ds, 565 zfs_prop_to_name( 566 ZFS_PROP_REDUNDANT_METADATA), 567 redundant_metadata_changed_cb, os); 568 } 569 if (err == 0) { 570 err = dsl_prop_register(ds, 571 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 572 recordsize_changed_cb, os); 573 } 574 if (err == 0) { 575 err = dsl_prop_register(ds, 576 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 577 dnodesize_changed_cb, os); 578 } 579 if (err == 0) { 580 err = dsl_prop_register(ds, 581 zfs_prop_to_name( 582 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 583 smallblk_changed_cb, os); 584 } 585 } 586 if (err != 0) { 587 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 588 kmem_free(os, sizeof (objset_t)); 589 return (err); 590 } 591 } else { 592 /* It's the meta-objset. */ 593 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 594 os->os_compress = ZIO_COMPRESS_ON; 595 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 596 os->os_encrypted = B_FALSE; 597 os->os_copies = spa_max_replication(spa); 598 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 599 os->os_dedup_verify = B_FALSE; 600 os->os_logbias = ZFS_LOGBIAS_LATENCY; 601 os->os_sync = ZFS_SYNC_STANDARD; 602 os->os_primary_cache = ZFS_CACHE_ALL; 603 os->os_secondary_cache = ZFS_CACHE_ALL; 604 os->os_dnodesize = DNODE_MIN_SIZE; 605 } 606 607 if (ds == NULL || !ds->ds_is_snapshot) 608 os->os_zil_header = os->os_phys->os_zil_header; 609 os->os_zil = zil_alloc(os, &os->os_zil_header); 610 611 for (i = 0; i < TXG_SIZE; i++) { 612 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 613 offsetof(dnode_t, dn_dirty_link[i]), 614 dnode_multilist_index_func); 615 } 616 list_create(&os->os_dnodes, sizeof (dnode_t), 617 offsetof(dnode_t, dn_link)); 618 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 619 offsetof(dmu_buf_impl_t, db_link)); 620 621 list_link_init(&os->os_evicting_node); 622 623 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 624 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 625 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 626 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 627 os->os_obj_next_percpu_len = boot_ncpus; 628 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 629 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 630 631 dnode_special_open(os, &os->os_phys->os_meta_dnode, 632 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 633 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 634 dnode_special_open(os, &os->os_phys->os_userused_dnode, 635 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 636 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 637 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 638 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 639 dnode_special_open(os, 640 &os->os_phys->os_projectused_dnode, 641 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 642 } 643 644 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 645 646 *osp = os; 647 return (0); 648 } 649 650 int 651 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 652 { 653 int err = 0; 654 655 /* 656 * We need the pool_config lock to manipulate the dsl_dataset_t. 657 * Even if the dataset is long-held, we need the pool_config lock 658 * to open the objset, as it needs to get properties. 659 */ 660 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 661 662 mutex_enter(&ds->ds_opening_lock); 663 if (ds->ds_objset == NULL) { 664 objset_t *os; 665 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 666 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 667 ds, dsl_dataset_get_blkptr(ds), &os); 668 rrw_exit(&ds->ds_bp_rwlock, FTAG); 669 670 if (err == 0) { 671 mutex_enter(&ds->ds_lock); 672 ASSERT(ds->ds_objset == NULL); 673 ds->ds_objset = os; 674 mutex_exit(&ds->ds_lock); 675 } 676 } 677 *osp = ds->ds_objset; 678 mutex_exit(&ds->ds_opening_lock); 679 return (err); 680 } 681 682 /* 683 * Holds the pool while the objset is held. Therefore only one objset 684 * can be held at a time. 685 */ 686 int 687 dmu_objset_hold_flags(const char *name, boolean_t decrypt, void *tag, 688 objset_t **osp) 689 { 690 dsl_pool_t *dp; 691 dsl_dataset_t *ds; 692 int err; 693 ds_hold_flags_t flags; 694 695 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 696 err = dsl_pool_hold(name, tag, &dp); 697 if (err != 0) 698 return (err); 699 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 700 if (err != 0) { 701 dsl_pool_rele(dp, tag); 702 return (err); 703 } 704 705 err = dmu_objset_from_ds(ds, osp); 706 if (err != 0) { 707 dsl_dataset_rele(ds, tag); 708 dsl_pool_rele(dp, tag); 709 } 710 711 return (err); 712 } 713 714 int 715 dmu_objset_hold(const char *name, void *tag, objset_t **osp) 716 { 717 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 718 } 719 720 static int 721 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 722 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 723 { 724 int err; 725 726 err = dmu_objset_from_ds(ds, osp); 727 if (err != 0) { 728 return (err); 729 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 730 return (SET_ERROR(EINVAL)); 731 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 732 return (SET_ERROR(EROFS)); 733 } else if (!readonly && decrypt && 734 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 735 return (SET_ERROR(EROFS)); 736 } 737 738 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 739 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 740 zbookmark_phys_t zb; 741 742 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 743 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 744 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 745 &zb, B_FALSE); 746 if (err != 0) 747 return (err); 748 749 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 750 } 751 752 return (0); 753 } 754 755 /* 756 * dsl_pool must not be held when this is called. 757 * Upon successful return, there will be a longhold on the dataset, 758 * and the dsl_pool will not be held. 759 */ 760 int 761 dmu_objset_own(const char *name, dmu_objset_type_t type, 762 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 763 { 764 dsl_pool_t *dp; 765 dsl_dataset_t *ds; 766 int err; 767 ds_hold_flags_t flags; 768 769 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 770 err = dsl_pool_hold(name, FTAG, &dp); 771 if (err != 0) 772 return (err); 773 err = dsl_dataset_own(dp, name, flags, tag, &ds); 774 if (err != 0) { 775 dsl_pool_rele(dp, FTAG); 776 return (err); 777 } 778 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 779 if (err != 0) { 780 dsl_dataset_disown(ds, flags, tag); 781 dsl_pool_rele(dp, FTAG); 782 return (err); 783 } 784 785 /* 786 * User accounting requires the dataset to be decrypted and rw. 787 * We also don't begin user accounting during claiming to help 788 * speed up pool import times and to keep this txg reserved 789 * completely for recovery work. 790 */ 791 if (!readonly && !dp->dp_spa->spa_claiming && 792 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 793 if (dmu_objset_userobjspace_upgradable(*osp) || 794 dmu_objset_projectquota_upgradable(*osp)) { 795 dmu_objset_id_quota_upgrade(*osp); 796 } else if (dmu_objset_userused_enabled(*osp)) { 797 dmu_objset_userspace_upgrade(*osp); 798 } 799 } 800 801 dsl_pool_rele(dp, FTAG); 802 return (0); 803 } 804 805 int 806 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 807 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 808 { 809 dsl_dataset_t *ds; 810 int err; 811 ds_hold_flags_t flags; 812 813 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 814 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 815 if (err != 0) 816 return (err); 817 818 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 819 if (err != 0) { 820 dsl_dataset_disown(ds, flags, tag); 821 return (err); 822 } 823 824 return (0); 825 } 826 827 void 828 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, void *tag) 829 { 830 ds_hold_flags_t flags; 831 dsl_pool_t *dp = dmu_objset_pool(os); 832 833 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 834 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 835 dsl_pool_rele(dp, tag); 836 } 837 838 void 839 dmu_objset_rele(objset_t *os, void *tag) 840 { 841 dmu_objset_rele_flags(os, B_FALSE, tag); 842 } 843 844 /* 845 * When we are called, os MUST refer to an objset associated with a dataset 846 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 847 * == tag. We will then release and reacquire ownership of the dataset while 848 * holding the pool config_rwlock to avoid intervening namespace or ownership 849 * changes may occur. 850 * 851 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 852 * release the hold on its dataset and acquire a new one on the dataset of the 853 * same name so that it can be partially torn down and reconstructed. 854 */ 855 void 856 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 857 boolean_t decrypt, void *tag) 858 { 859 dsl_pool_t *dp; 860 char name[ZFS_MAX_DATASET_NAME_LEN]; 861 ds_hold_flags_t flags; 862 863 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 864 VERIFY3P(ds, !=, NULL); 865 VERIFY3P(ds->ds_owner, ==, tag); 866 VERIFY(dsl_dataset_long_held(ds)); 867 868 dsl_dataset_name(ds, name); 869 dp = ds->ds_dir->dd_pool; 870 dsl_pool_config_enter(dp, FTAG); 871 dsl_dataset_disown(ds, flags, tag); 872 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 873 dsl_pool_config_exit(dp, FTAG); 874 } 875 876 void 877 dmu_objset_disown(objset_t *os, boolean_t decrypt, void *tag) 878 { 879 ds_hold_flags_t flags; 880 881 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 882 /* 883 * Stop upgrading thread 884 */ 885 dmu_objset_upgrade_stop(os); 886 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 887 } 888 889 void 890 dmu_objset_evict_dbufs(objset_t *os) 891 { 892 dnode_t *dn_marker; 893 dnode_t *dn; 894 895 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 896 897 mutex_enter(&os->os_lock); 898 dn = list_head(&os->os_dnodes); 899 while (dn != NULL) { 900 /* 901 * Skip dnodes without holds. We have to do this dance 902 * because dnode_add_ref() only works if there is already a 903 * hold. If the dnode has no holds, then it has no dbufs. 904 */ 905 if (dnode_add_ref(dn, FTAG)) { 906 list_insert_after(&os->os_dnodes, dn, dn_marker); 907 mutex_exit(&os->os_lock); 908 909 dnode_evict_dbufs(dn); 910 dnode_rele(dn, FTAG); 911 912 mutex_enter(&os->os_lock); 913 dn = list_next(&os->os_dnodes, dn_marker); 914 list_remove(&os->os_dnodes, dn_marker); 915 } else { 916 dn = list_next(&os->os_dnodes, dn); 917 } 918 } 919 mutex_exit(&os->os_lock); 920 921 kmem_free(dn_marker, sizeof (dnode_t)); 922 923 if (DMU_USERUSED_DNODE(os) != NULL) { 924 if (DMU_PROJECTUSED_DNODE(os) != NULL) 925 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 926 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 927 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 928 } 929 dnode_evict_dbufs(DMU_META_DNODE(os)); 930 } 931 932 /* 933 * Objset eviction processing is split into into two pieces. 934 * The first marks the objset as evicting, evicts any dbufs that 935 * have a refcount of zero, and then queues up the objset for the 936 * second phase of eviction. Once os->os_dnodes has been cleared by 937 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 938 * The second phase closes the special dnodes, dequeues the objset from 939 * the list of those undergoing eviction, and finally frees the objset. 940 * 941 * NOTE: Due to asynchronous eviction processing (invocation of 942 * dnode_buf_pageout()), it is possible for the meta dnode for the 943 * objset to have no holds even though os->os_dnodes is not empty. 944 */ 945 void 946 dmu_objset_evict(objset_t *os) 947 { 948 dsl_dataset_t *ds = os->os_dsl_dataset; 949 950 for (int t = 0; t < TXG_SIZE; t++) 951 ASSERT(!dmu_objset_is_dirty(os, t)); 952 953 if (ds) 954 dsl_prop_unregister_all(ds, os); 955 956 if (os->os_sa) 957 sa_tear_down(os); 958 959 dmu_objset_evict_dbufs(os); 960 961 mutex_enter(&os->os_lock); 962 spa_evicting_os_register(os->os_spa, os); 963 if (list_is_empty(&os->os_dnodes)) { 964 mutex_exit(&os->os_lock); 965 dmu_objset_evict_done(os); 966 } else { 967 mutex_exit(&os->os_lock); 968 } 969 970 971 } 972 973 void 974 dmu_objset_evict_done(objset_t *os) 975 { 976 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 977 978 dnode_special_close(&os->os_meta_dnode); 979 if (DMU_USERUSED_DNODE(os)) { 980 if (DMU_PROJECTUSED_DNODE(os)) 981 dnode_special_close(&os->os_projectused_dnode); 982 dnode_special_close(&os->os_userused_dnode); 983 dnode_special_close(&os->os_groupused_dnode); 984 } 985 zil_free(os->os_zil); 986 987 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 988 989 /* 990 * This is a barrier to prevent the objset from going away in 991 * dnode_move() until we can safely ensure that the objset is still in 992 * use. We consider the objset valid before the barrier and invalid 993 * after the barrier. 994 */ 995 rw_enter(&os_lock, RW_READER); 996 rw_exit(&os_lock); 997 998 kmem_free(os->os_obj_next_percpu, 999 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1000 1001 mutex_destroy(&os->os_lock); 1002 mutex_destroy(&os->os_userused_lock); 1003 mutex_destroy(&os->os_obj_lock); 1004 mutex_destroy(&os->os_user_ptr_lock); 1005 mutex_destroy(&os->os_upgrade_lock); 1006 for (int i = 0; i < TXG_SIZE; i++) 1007 multilist_destroy(&os->os_dirty_dnodes[i]); 1008 spa_evicting_os_deregister(os->os_spa, os); 1009 kmem_free(os, sizeof (objset_t)); 1010 } 1011 1012 inode_timespec_t 1013 dmu_objset_snap_cmtime(objset_t *os) 1014 { 1015 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1016 } 1017 1018 objset_t * 1019 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1020 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1021 { 1022 objset_t *os; 1023 dnode_t *mdn; 1024 1025 ASSERT(dmu_tx_is_syncing(tx)); 1026 1027 if (blksz == 0) 1028 blksz = DNODE_BLOCK_SIZE; 1029 if (ibs == 0) 1030 ibs = DN_MAX_INDBLKSHIFT; 1031 1032 if (ds != NULL) 1033 VERIFY0(dmu_objset_from_ds(ds, &os)); 1034 else 1035 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1036 1037 mdn = DMU_META_DNODE(os); 1038 1039 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1040 DNODE_MIN_SLOTS, tx); 1041 1042 /* 1043 * We don't want to have to increase the meta-dnode's nlevels 1044 * later, because then we could do it in quiescing context while 1045 * we are also accessing it in open context. 1046 * 1047 * This precaution is not necessary for the MOS (ds == NULL), 1048 * because the MOS is only updated in syncing context. 1049 * This is most fortunate: the MOS is the only objset that 1050 * needs to be synced multiple times as spa_sync() iterates 1051 * to convergence, so minimizing its dn_nlevels matters. 1052 */ 1053 if (ds != NULL) { 1054 if (levels == 0) { 1055 levels = 1; 1056 1057 /* 1058 * Determine the number of levels necessary for the 1059 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1060 * that in order to ensure that we do not overflow 1061 * 64 bits, there has to be a nlevels that gives us a 1062 * number of blocks > DN_MAX_OBJECT but < 2^64. 1063 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1064 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1065 * (16). 1066 */ 1067 while ((uint64_t)mdn->dn_nblkptr << 1068 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1069 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1070 DN_MAX_OBJECT) 1071 levels++; 1072 } 1073 1074 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1075 mdn->dn_nlevels = levels; 1076 } 1077 1078 ASSERT(type != DMU_OST_NONE); 1079 ASSERT(type != DMU_OST_ANY); 1080 ASSERT(type < DMU_OST_NUMTYPES); 1081 os->os_phys->os_type = type; 1082 1083 /* 1084 * Enable user accounting if it is enabled and this is not an 1085 * encrypted receive. 1086 */ 1087 if (dmu_objset_userused_enabled(os) && 1088 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1089 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1090 if (dmu_objset_userobjused_enabled(os)) { 1091 ds->ds_feature_activation[ 1092 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1093 os->os_phys->os_flags |= 1094 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1095 } 1096 if (dmu_objset_projectquota_enabled(os)) { 1097 ds->ds_feature_activation[ 1098 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1099 os->os_phys->os_flags |= 1100 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1101 } 1102 os->os_flags = os->os_phys->os_flags; 1103 } 1104 1105 dsl_dataset_dirty(ds, tx); 1106 1107 return (os); 1108 } 1109 1110 /* called from dsl for meta-objset */ 1111 objset_t * 1112 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1113 dmu_objset_type_t type, dmu_tx_t *tx) 1114 { 1115 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1116 } 1117 1118 typedef struct dmu_objset_create_arg { 1119 const char *doca_name; 1120 cred_t *doca_cred; 1121 proc_t *doca_proc; 1122 void (*doca_userfunc)(objset_t *os, void *arg, 1123 cred_t *cr, dmu_tx_t *tx); 1124 void *doca_userarg; 1125 dmu_objset_type_t doca_type; 1126 uint64_t doca_flags; 1127 dsl_crypto_params_t *doca_dcp; 1128 } dmu_objset_create_arg_t; 1129 1130 /*ARGSUSED*/ 1131 static int 1132 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1133 { 1134 dmu_objset_create_arg_t *doca = arg; 1135 dsl_pool_t *dp = dmu_tx_pool(tx); 1136 dsl_dir_t *pdd; 1137 dsl_dataset_t *parentds; 1138 objset_t *parentos; 1139 const char *tail; 1140 int error; 1141 1142 if (strchr(doca->doca_name, '@') != NULL) 1143 return (SET_ERROR(EINVAL)); 1144 1145 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1146 return (SET_ERROR(ENAMETOOLONG)); 1147 1148 if (dataset_nestcheck(doca->doca_name) != 0) 1149 return (SET_ERROR(ENAMETOOLONG)); 1150 1151 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1152 if (error != 0) 1153 return (error); 1154 if (tail == NULL) { 1155 dsl_dir_rele(pdd, FTAG); 1156 return (SET_ERROR(EEXIST)); 1157 } 1158 1159 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1160 if (error != 0) { 1161 dsl_dir_rele(pdd, FTAG); 1162 return (error); 1163 } 1164 1165 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1166 doca->doca_cred, doca->doca_proc); 1167 if (error != 0) { 1168 dsl_dir_rele(pdd, FTAG); 1169 return (error); 1170 } 1171 1172 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1173 error = dsl_dataset_hold_obj(pdd->dd_pool, 1174 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1175 if (error != 0) { 1176 dsl_dir_rele(pdd, FTAG); 1177 return (error); 1178 } 1179 error = dmu_objset_from_ds(parentds, &parentos); 1180 if (error != 0) { 1181 dsl_dataset_rele(parentds, FTAG); 1182 dsl_dir_rele(pdd, FTAG); 1183 return (error); 1184 } 1185 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1186 dsl_dataset_rele(parentds, FTAG); 1187 dsl_dir_rele(pdd, FTAG); 1188 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1189 } 1190 dsl_dataset_rele(parentds, FTAG); 1191 dsl_dir_rele(pdd, FTAG); 1192 1193 return (error); 1194 } 1195 1196 static void 1197 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1198 { 1199 dmu_objset_create_arg_t *doca = arg; 1200 dsl_pool_t *dp = dmu_tx_pool(tx); 1201 spa_t *spa = dp->dp_spa; 1202 dsl_dir_t *pdd; 1203 const char *tail; 1204 dsl_dataset_t *ds; 1205 uint64_t obj; 1206 blkptr_t *bp; 1207 objset_t *os; 1208 zio_t *rzio; 1209 1210 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1211 1212 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1213 doca->doca_cred, doca->doca_dcp, tx); 1214 1215 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1216 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1217 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1218 bp = dsl_dataset_get_blkptr(ds); 1219 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1220 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1221 1222 if (doca->doca_userfunc != NULL) { 1223 doca->doca_userfunc(os, doca->doca_userarg, 1224 doca->doca_cred, tx); 1225 } 1226 1227 /* 1228 * The doca_userfunc() may write out some data that needs to be 1229 * encrypted if the dataset is encrypted (specifically the root 1230 * directory). This data must be written out before the encryption 1231 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1232 * I/O to occur immediately by invoking the relevant sections of 1233 * dsl_pool_sync(). 1234 */ 1235 if (os->os_encrypted) { 1236 dsl_dataset_t *tmpds = NULL; 1237 boolean_t need_sync_done = B_FALSE; 1238 1239 mutex_enter(&ds->ds_lock); 1240 ds->ds_owner = FTAG; 1241 mutex_exit(&ds->ds_lock); 1242 1243 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1244 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1245 tx->tx_txg); 1246 if (tmpds != NULL) { 1247 dsl_dataset_sync(ds, rzio, tx); 1248 need_sync_done = B_TRUE; 1249 } 1250 VERIFY0(zio_wait(rzio)); 1251 1252 dmu_objset_sync_done(os, tx); 1253 taskq_wait(dp->dp_sync_taskq); 1254 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1255 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1256 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1257 } 1258 1259 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1260 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1261 tx->tx_txg); 1262 if (tmpds != NULL) { 1263 dmu_buf_rele(ds->ds_dbuf, ds); 1264 dsl_dataset_sync(ds, rzio, tx); 1265 } 1266 VERIFY0(zio_wait(rzio)); 1267 1268 if (need_sync_done) { 1269 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1270 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1271 dsl_dataset_sync_done(ds, tx); 1272 } 1273 1274 mutex_enter(&ds->ds_lock); 1275 ds->ds_owner = NULL; 1276 mutex_exit(&ds->ds_lock); 1277 } 1278 1279 spa_history_log_internal_ds(ds, "create", tx, " "); 1280 1281 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1282 dsl_dir_rele(pdd, FTAG); 1283 } 1284 1285 int 1286 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1287 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1288 { 1289 dmu_objset_create_arg_t doca; 1290 dsl_crypto_params_t tmp_dcp = { 0 }; 1291 1292 doca.doca_name = name; 1293 doca.doca_cred = CRED(); 1294 doca.doca_proc = curproc; 1295 doca.doca_flags = flags; 1296 doca.doca_userfunc = func; 1297 doca.doca_userarg = arg; 1298 doca.doca_type = type; 1299 1300 /* 1301 * Some callers (mostly for testing) do not provide a dcp on their 1302 * own but various code inside the sync task will require it to be 1303 * allocated. Rather than adding NULL checks throughout this code 1304 * or adding dummy dcp's to all of the callers we simply create a 1305 * dummy one here and use that. This zero dcp will have the same 1306 * effect as asking for inheritance of all encryption params. 1307 */ 1308 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1309 1310 int rv = dsl_sync_task(name, 1311 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1312 6, ZFS_SPACE_CHECK_NORMAL); 1313 1314 if (rv == 0) 1315 zvol_create_minor(name); 1316 return (rv); 1317 } 1318 1319 typedef struct dmu_objset_clone_arg { 1320 const char *doca_clone; 1321 const char *doca_origin; 1322 cred_t *doca_cred; 1323 proc_t *doca_proc; 1324 } dmu_objset_clone_arg_t; 1325 1326 /*ARGSUSED*/ 1327 static int 1328 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1329 { 1330 dmu_objset_clone_arg_t *doca = arg; 1331 dsl_dir_t *pdd; 1332 const char *tail; 1333 int error; 1334 dsl_dataset_t *origin; 1335 dsl_pool_t *dp = dmu_tx_pool(tx); 1336 1337 if (strchr(doca->doca_clone, '@') != NULL) 1338 return (SET_ERROR(EINVAL)); 1339 1340 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1341 return (SET_ERROR(ENAMETOOLONG)); 1342 1343 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1344 if (error != 0) 1345 return (error); 1346 if (tail == NULL) { 1347 dsl_dir_rele(pdd, FTAG); 1348 return (SET_ERROR(EEXIST)); 1349 } 1350 1351 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1352 doca->doca_cred, doca->doca_proc); 1353 if (error != 0) { 1354 dsl_dir_rele(pdd, FTAG); 1355 return (SET_ERROR(EDQUOT)); 1356 } 1357 1358 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1359 if (error != 0) { 1360 dsl_dir_rele(pdd, FTAG); 1361 return (error); 1362 } 1363 1364 /* You can only clone snapshots, not the head datasets. */ 1365 if (!origin->ds_is_snapshot) { 1366 dsl_dataset_rele(origin, FTAG); 1367 dsl_dir_rele(pdd, FTAG); 1368 return (SET_ERROR(EINVAL)); 1369 } 1370 1371 dsl_dataset_rele(origin, FTAG); 1372 dsl_dir_rele(pdd, FTAG); 1373 1374 return (0); 1375 } 1376 1377 static void 1378 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1379 { 1380 dmu_objset_clone_arg_t *doca = arg; 1381 dsl_pool_t *dp = dmu_tx_pool(tx); 1382 dsl_dir_t *pdd; 1383 const char *tail; 1384 dsl_dataset_t *origin, *ds; 1385 uint64_t obj; 1386 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1387 1388 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1389 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1390 1391 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1392 doca->doca_cred, NULL, tx); 1393 1394 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1395 dsl_dataset_name(origin, namebuf); 1396 spa_history_log_internal_ds(ds, "clone", tx, 1397 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1398 dsl_dataset_rele(ds, FTAG); 1399 dsl_dataset_rele(origin, FTAG); 1400 dsl_dir_rele(pdd, FTAG); 1401 } 1402 1403 int 1404 dmu_objset_clone(const char *clone, const char *origin) 1405 { 1406 dmu_objset_clone_arg_t doca; 1407 1408 doca.doca_clone = clone; 1409 doca.doca_origin = origin; 1410 doca.doca_cred = CRED(); 1411 doca.doca_proc = curproc; 1412 1413 int rv = dsl_sync_task(clone, 1414 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1415 6, ZFS_SPACE_CHECK_NORMAL); 1416 1417 if (rv == 0) 1418 zvol_create_minor(clone); 1419 1420 return (rv); 1421 } 1422 1423 int 1424 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1425 { 1426 int err; 1427 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1428 nvlist_t *snaps = fnvlist_alloc(); 1429 1430 fnvlist_add_boolean(snaps, longsnap); 1431 kmem_strfree(longsnap); 1432 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1433 fnvlist_free(snaps); 1434 return (err); 1435 } 1436 1437 static void 1438 dmu_objset_upgrade_task_cb(void *data) 1439 { 1440 objset_t *os = data; 1441 1442 mutex_enter(&os->os_upgrade_lock); 1443 os->os_upgrade_status = EINTR; 1444 if (!os->os_upgrade_exit) { 1445 int status; 1446 1447 mutex_exit(&os->os_upgrade_lock); 1448 1449 status = os->os_upgrade_cb(os); 1450 1451 mutex_enter(&os->os_upgrade_lock); 1452 1453 os->os_upgrade_status = status; 1454 } 1455 os->os_upgrade_exit = B_TRUE; 1456 os->os_upgrade_id = 0; 1457 mutex_exit(&os->os_upgrade_lock); 1458 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1459 } 1460 1461 static void 1462 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1463 { 1464 if (os->os_upgrade_id != 0) 1465 return; 1466 1467 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1468 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1469 1470 mutex_enter(&os->os_upgrade_lock); 1471 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1472 os->os_upgrade_exit = B_FALSE; 1473 os->os_upgrade_cb = cb; 1474 os->os_upgrade_id = taskq_dispatch( 1475 os->os_spa->spa_upgrade_taskq, 1476 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1477 if (os->os_upgrade_id == TASKQID_INVALID) { 1478 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1479 os->os_upgrade_status = ENOMEM; 1480 } 1481 } else { 1482 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1483 } 1484 mutex_exit(&os->os_upgrade_lock); 1485 } 1486 1487 static void 1488 dmu_objset_upgrade_stop(objset_t *os) 1489 { 1490 mutex_enter(&os->os_upgrade_lock); 1491 os->os_upgrade_exit = B_TRUE; 1492 if (os->os_upgrade_id != 0) { 1493 taskqid_t id = os->os_upgrade_id; 1494 1495 os->os_upgrade_id = 0; 1496 mutex_exit(&os->os_upgrade_lock); 1497 1498 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1499 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1500 } 1501 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1502 } else { 1503 mutex_exit(&os->os_upgrade_lock); 1504 } 1505 } 1506 1507 static void 1508 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1509 { 1510 dnode_t *dn; 1511 1512 while ((dn = multilist_sublist_head(list)) != NULL) { 1513 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1514 ASSERT(dn->dn_dbuf->db_data_pending); 1515 /* 1516 * Initialize dn_zio outside dnode_sync() because the 1517 * meta-dnode needs to set it outside dnode_sync(). 1518 */ 1519 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1520 ASSERT(dn->dn_zio); 1521 1522 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1523 multilist_sublist_remove(list, dn); 1524 1525 /* 1526 * See the comment above dnode_rele_task() for an explanation 1527 * of why this dnode hold is always needed (even when not 1528 * doing user accounting). 1529 */ 1530 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1531 (void) dnode_add_ref(dn, newlist); 1532 multilist_insert(newlist, dn); 1533 1534 dnode_sync(dn, tx); 1535 } 1536 } 1537 1538 /* ARGSUSED */ 1539 static void 1540 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1541 { 1542 blkptr_t *bp = zio->io_bp; 1543 objset_t *os = arg; 1544 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1545 uint64_t fill = 0; 1546 1547 ASSERT(!BP_IS_EMBEDDED(bp)); 1548 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1549 ASSERT0(BP_GET_LEVEL(bp)); 1550 1551 /* 1552 * Update rootbp fill count: it should be the number of objects 1553 * allocated in the object set (not counting the "special" 1554 * objects that are stored in the objset_phys_t -- the meta 1555 * dnode and user/group/project accounting objects). 1556 */ 1557 for (int i = 0; i < dnp->dn_nblkptr; i++) 1558 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1559 1560 BP_SET_FILL(bp, fill); 1561 1562 if (os->os_dsl_dataset != NULL) 1563 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1564 *os->os_rootbp = *bp; 1565 if (os->os_dsl_dataset != NULL) 1566 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1567 } 1568 1569 /* ARGSUSED */ 1570 static void 1571 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1572 { 1573 blkptr_t *bp = zio->io_bp; 1574 blkptr_t *bp_orig = &zio->io_bp_orig; 1575 objset_t *os = arg; 1576 1577 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1578 ASSERT(BP_EQUAL(bp, bp_orig)); 1579 } else { 1580 dsl_dataset_t *ds = os->os_dsl_dataset; 1581 dmu_tx_t *tx = os->os_synctx; 1582 1583 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1584 dsl_dataset_block_born(ds, bp, tx); 1585 } 1586 kmem_free(bp, sizeof (*bp)); 1587 } 1588 1589 typedef struct sync_dnodes_arg { 1590 multilist_t *sda_list; 1591 int sda_sublist_idx; 1592 multilist_t *sda_newlist; 1593 dmu_tx_t *sda_tx; 1594 } sync_dnodes_arg_t; 1595 1596 static void 1597 sync_dnodes_task(void *arg) 1598 { 1599 sync_dnodes_arg_t *sda = arg; 1600 1601 multilist_sublist_t *ms = 1602 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1603 1604 dmu_objset_sync_dnodes(ms, sda->sda_tx); 1605 1606 multilist_sublist_unlock(ms); 1607 1608 kmem_free(sda, sizeof (*sda)); 1609 } 1610 1611 1612 /* called from dsl */ 1613 void 1614 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1615 { 1616 int txgoff; 1617 zbookmark_phys_t zb; 1618 zio_prop_t zp; 1619 zio_t *zio; 1620 list_t *list; 1621 dbuf_dirty_record_t *dr; 1622 int num_sublists; 1623 multilist_t *ml; 1624 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1625 *blkptr_copy = *os->os_rootbp; 1626 1627 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1628 1629 ASSERT(dmu_tx_is_syncing(tx)); 1630 /* XXX the write_done callback should really give us the tx... */ 1631 os->os_synctx = tx; 1632 1633 if (os->os_dsl_dataset == NULL) { 1634 /* 1635 * This is the MOS. If we have upgraded, 1636 * spa_max_replication() could change, so reset 1637 * os_copies here. 1638 */ 1639 os->os_copies = spa_max_replication(os->os_spa); 1640 } 1641 1642 /* 1643 * Create the root block IO 1644 */ 1645 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1646 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1647 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1648 arc_release(os->os_phys_buf, &os->os_phys_buf); 1649 1650 dmu_write_policy(os, NULL, 0, 0, &zp); 1651 1652 /* 1653 * If we are either claiming the ZIL or doing a raw receive, write 1654 * out the os_phys_buf raw. Neither of these actions will effect the 1655 * MAC at this point. 1656 */ 1657 if (os->os_raw_receive || 1658 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1659 ASSERT(os->os_encrypted); 1660 arc_convert_to_raw(os->os_phys_buf, 1661 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1662 DMU_OT_OBJSET, NULL, NULL, NULL); 1663 } 1664 1665 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1666 blkptr_copy, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os), 1667 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done, 1668 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1669 1670 /* 1671 * Sync special dnodes - the parent IO for the sync is the root block 1672 */ 1673 DMU_META_DNODE(os)->dn_zio = zio; 1674 dnode_sync(DMU_META_DNODE(os), tx); 1675 1676 os->os_phys->os_flags = os->os_flags; 1677 1678 if (DMU_USERUSED_DNODE(os) && 1679 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1680 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1681 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1682 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1683 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1684 } 1685 1686 if (DMU_PROJECTUSED_DNODE(os) && 1687 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1688 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1689 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1690 } 1691 1692 txgoff = tx->tx_txg & TXG_MASK; 1693 1694 /* 1695 * We must create the list here because it uses the 1696 * dn_dirty_link[] of this txg. But it may already 1697 * exist because we call dsl_dataset_sync() twice per txg. 1698 */ 1699 if (os->os_synced_dnodes.ml_sublists == NULL) { 1700 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1701 offsetof(dnode_t, dn_dirty_link[txgoff]), 1702 dnode_multilist_index_func); 1703 } else { 1704 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1705 offsetof(dnode_t, dn_dirty_link[txgoff])); 1706 } 1707 1708 ml = &os->os_dirty_dnodes[txgoff]; 1709 num_sublists = multilist_get_num_sublists(ml); 1710 for (int i = 0; i < num_sublists; i++) { 1711 if (multilist_sublist_is_empty_idx(ml, i)) 1712 continue; 1713 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1714 sda->sda_list = ml; 1715 sda->sda_sublist_idx = i; 1716 sda->sda_tx = tx; 1717 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1718 sync_dnodes_task, sda, 0); 1719 /* callback frees sda */ 1720 } 1721 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1722 1723 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1724 while ((dr = list_head(list)) != NULL) { 1725 ASSERT0(dr->dr_dbuf->db_level); 1726 list_remove(list, dr); 1727 zio_nowait(dr->dr_zio); 1728 } 1729 1730 /* Enable dnode backfill if enough objects have been freed. */ 1731 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1732 os->os_rescan_dnodes = B_TRUE; 1733 os->os_freed_dnodes = 0; 1734 } 1735 1736 /* 1737 * Free intent log blocks up to this tx. 1738 */ 1739 zil_sync(os->os_zil, tx); 1740 os->os_phys->os_zil_header = os->os_zil_header; 1741 zio_nowait(zio); 1742 } 1743 1744 boolean_t 1745 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1746 { 1747 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1748 } 1749 1750 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1751 1752 void 1753 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1754 { 1755 file_cbs[ost] = cb; 1756 } 1757 1758 int 1759 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1760 zfs_file_info_t *zfi) 1761 { 1762 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1763 if (cb == NULL) 1764 return (EINVAL); 1765 return (cb(bonustype, data, zfi)); 1766 } 1767 1768 boolean_t 1769 dmu_objset_userused_enabled(objset_t *os) 1770 { 1771 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1772 file_cbs[os->os_phys->os_type] != NULL && 1773 DMU_USERUSED_DNODE(os) != NULL); 1774 } 1775 1776 boolean_t 1777 dmu_objset_userobjused_enabled(objset_t *os) 1778 { 1779 return (dmu_objset_userused_enabled(os) && 1780 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1781 } 1782 1783 boolean_t 1784 dmu_objset_projectquota_enabled(objset_t *os) 1785 { 1786 return (file_cbs[os->os_phys->os_type] != NULL && 1787 DMU_PROJECTUSED_DNODE(os) != NULL && 1788 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1789 } 1790 1791 typedef struct userquota_node { 1792 /* must be in the first filed, see userquota_update_cache() */ 1793 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1794 int64_t uqn_delta; 1795 avl_node_t uqn_node; 1796 } userquota_node_t; 1797 1798 typedef struct userquota_cache { 1799 avl_tree_t uqc_user_deltas; 1800 avl_tree_t uqc_group_deltas; 1801 avl_tree_t uqc_project_deltas; 1802 } userquota_cache_t; 1803 1804 static int 1805 userquota_compare(const void *l, const void *r) 1806 { 1807 const userquota_node_t *luqn = l; 1808 const userquota_node_t *ruqn = r; 1809 int rv; 1810 1811 /* 1812 * NB: can only access uqn_id because userquota_update_cache() doesn't 1813 * pass in an entire userquota_node_t. 1814 */ 1815 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1816 1817 return (TREE_ISIGN(rv)); 1818 } 1819 1820 static void 1821 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1822 { 1823 void *cookie; 1824 userquota_node_t *uqn; 1825 1826 ASSERT(dmu_tx_is_syncing(tx)); 1827 1828 cookie = NULL; 1829 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1830 &cookie)) != NULL) { 1831 /* 1832 * os_userused_lock protects against concurrent calls to 1833 * zap_increment_int(). It's needed because zap_increment_int() 1834 * is not thread-safe (i.e. not atomic). 1835 */ 1836 mutex_enter(&os->os_userused_lock); 1837 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1838 uqn->uqn_id, uqn->uqn_delta, tx)); 1839 mutex_exit(&os->os_userused_lock); 1840 kmem_free(uqn, sizeof (*uqn)); 1841 } 1842 avl_destroy(&cache->uqc_user_deltas); 1843 1844 cookie = NULL; 1845 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1846 &cookie)) != NULL) { 1847 mutex_enter(&os->os_userused_lock); 1848 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1849 uqn->uqn_id, uqn->uqn_delta, tx)); 1850 mutex_exit(&os->os_userused_lock); 1851 kmem_free(uqn, sizeof (*uqn)); 1852 } 1853 avl_destroy(&cache->uqc_group_deltas); 1854 1855 if (dmu_objset_projectquota_enabled(os)) { 1856 cookie = NULL; 1857 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1858 &cookie)) != NULL) { 1859 mutex_enter(&os->os_userused_lock); 1860 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1861 uqn->uqn_id, uqn->uqn_delta, tx)); 1862 mutex_exit(&os->os_userused_lock); 1863 kmem_free(uqn, sizeof (*uqn)); 1864 } 1865 avl_destroy(&cache->uqc_project_deltas); 1866 } 1867 } 1868 1869 static void 1870 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1871 { 1872 userquota_node_t *uqn; 1873 avl_index_t idx; 1874 1875 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1876 /* 1877 * Use id directly for searching because uqn_id is the first field of 1878 * userquota_node_t and fields after uqn_id won't be accessed in 1879 * avl_find(). 1880 */ 1881 uqn = avl_find(avl, (const void *)id, &idx); 1882 if (uqn == NULL) { 1883 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1884 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1885 avl_insert(avl, uqn, idx); 1886 } 1887 uqn->uqn_delta += delta; 1888 } 1889 1890 static void 1891 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1892 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1893 boolean_t subtract) 1894 { 1895 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1896 int64_t delta = DNODE_MIN_SIZE + used; 1897 char name[20]; 1898 1899 if (subtract) 1900 delta = -delta; 1901 1902 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1903 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1904 1905 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1906 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1907 1908 if (dmu_objset_projectquota_enabled(os)) { 1909 (void) snprintf(name, sizeof (name), "%llx", 1910 (longlong_t)project); 1911 userquota_update_cache(&cache->uqc_project_deltas, 1912 name, delta); 1913 } 1914 } 1915 } 1916 1917 static void 1918 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1919 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1920 { 1921 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1922 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1923 int delta = subtract ? -1 : 1; 1924 1925 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1926 (longlong_t)user); 1927 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1928 1929 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1930 (longlong_t)group); 1931 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1932 1933 if (dmu_objset_projectquota_enabled(os)) { 1934 (void) snprintf(name, sizeof (name), 1935 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1936 userquota_update_cache(&cache->uqc_project_deltas, 1937 name, delta); 1938 } 1939 } 1940 } 1941 1942 typedef struct userquota_updates_arg { 1943 objset_t *uua_os; 1944 int uua_sublist_idx; 1945 dmu_tx_t *uua_tx; 1946 } userquota_updates_arg_t; 1947 1948 static void 1949 userquota_updates_task(void *arg) 1950 { 1951 userquota_updates_arg_t *uua = arg; 1952 objset_t *os = uua->uua_os; 1953 dmu_tx_t *tx = uua->uua_tx; 1954 dnode_t *dn; 1955 userquota_cache_t cache = { { 0 } }; 1956 1957 multilist_sublist_t *list = 1958 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 1959 1960 ASSERT(multilist_sublist_head(list) == NULL || 1961 dmu_objset_userused_enabled(os)); 1962 avl_create(&cache.uqc_user_deltas, userquota_compare, 1963 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1964 avl_create(&cache.uqc_group_deltas, userquota_compare, 1965 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1966 if (dmu_objset_projectquota_enabled(os)) 1967 avl_create(&cache.uqc_project_deltas, userquota_compare, 1968 sizeof (userquota_node_t), offsetof(userquota_node_t, 1969 uqn_node)); 1970 1971 while ((dn = multilist_sublist_head(list)) != NULL) { 1972 int flags; 1973 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 1974 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 1975 dn->dn_phys->dn_flags & 1976 DNODE_FLAG_USERUSED_ACCOUNTED); 1977 1978 flags = dn->dn_id_flags; 1979 ASSERT(flags); 1980 if (flags & DN_ID_OLD_EXIST) { 1981 do_userquota_update(os, &cache, dn->dn_oldused, 1982 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 1983 dn->dn_oldprojid, B_TRUE); 1984 do_userobjquota_update(os, &cache, dn->dn_oldflags, 1985 dn->dn_olduid, dn->dn_oldgid, 1986 dn->dn_oldprojid, B_TRUE); 1987 } 1988 if (flags & DN_ID_NEW_EXIST) { 1989 do_userquota_update(os, &cache, 1990 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 1991 dn->dn_newuid, dn->dn_newgid, 1992 dn->dn_newprojid, B_FALSE); 1993 do_userobjquota_update(os, &cache, 1994 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 1995 dn->dn_newprojid, B_FALSE); 1996 } 1997 1998 mutex_enter(&dn->dn_mtx); 1999 dn->dn_oldused = 0; 2000 dn->dn_oldflags = 0; 2001 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2002 dn->dn_olduid = dn->dn_newuid; 2003 dn->dn_oldgid = dn->dn_newgid; 2004 dn->dn_oldprojid = dn->dn_newprojid; 2005 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2006 if (dn->dn_bonuslen == 0) 2007 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2008 else 2009 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2010 } 2011 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2012 mutex_exit(&dn->dn_mtx); 2013 2014 multilist_sublist_remove(list, dn); 2015 dnode_rele(dn, &os->os_synced_dnodes); 2016 } 2017 do_userquota_cacheflush(os, &cache, tx); 2018 multilist_sublist_unlock(list); 2019 kmem_free(uua, sizeof (*uua)); 2020 } 2021 2022 /* 2023 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2024 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2025 * evicted because the block containing the dnode can't be evicted until it is 2026 * written out. However, this hold is necessary to prevent the dnode_t from 2027 * being moved (via dnode_move()) while it's still referenced by 2028 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2029 * dirty_lightweight_leaf-type dirty records. 2030 * 2031 * If we are doing user-object accounting, the dnode_rele() happens from 2032 * userquota_updates_task() instead. 2033 */ 2034 static void 2035 dnode_rele_task(void *arg) 2036 { 2037 userquota_updates_arg_t *uua = arg; 2038 objset_t *os = uua->uua_os; 2039 2040 multilist_sublist_t *list = 2041 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2042 2043 dnode_t *dn; 2044 while ((dn = multilist_sublist_head(list)) != NULL) { 2045 multilist_sublist_remove(list, dn); 2046 dnode_rele(dn, &os->os_synced_dnodes); 2047 } 2048 multilist_sublist_unlock(list); 2049 kmem_free(uua, sizeof (*uua)); 2050 } 2051 2052 /* 2053 * Return TRUE if userquota updates are needed. 2054 */ 2055 static boolean_t 2056 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2057 { 2058 if (!dmu_objset_userused_enabled(os)) 2059 return (B_FALSE); 2060 2061 /* 2062 * If this is a raw receive just return and handle accounting 2063 * later when we have the keys loaded. We also don't do user 2064 * accounting during claiming since the datasets are not owned 2065 * for the duration of claiming and this txg should only be 2066 * used for recovery. 2067 */ 2068 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2069 return (B_FALSE); 2070 2071 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2072 return (B_FALSE); 2073 2074 /* Allocate the user/group/project used objects if necessary. */ 2075 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2076 VERIFY0(zap_create_claim(os, 2077 DMU_USERUSED_OBJECT, 2078 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2079 VERIFY0(zap_create_claim(os, 2080 DMU_GROUPUSED_OBJECT, 2081 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2082 } 2083 2084 if (dmu_objset_projectquota_enabled(os) && 2085 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2086 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2087 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2088 } 2089 return (B_TRUE); 2090 } 2091 2092 /* 2093 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2094 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2095 * The caller must taskq_wait(dp_sync_taskq). 2096 */ 2097 void 2098 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2099 { 2100 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2101 2102 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2103 for (int i = 0; i < num_sublists; i++) { 2104 userquota_updates_arg_t *uua = 2105 kmem_alloc(sizeof (*uua), KM_SLEEP); 2106 uua->uua_os = os; 2107 uua->uua_sublist_idx = i; 2108 uua->uua_tx = tx; 2109 2110 /* 2111 * If we don't need to update userquotas, use 2112 * dnode_rele_task() to call dnode_rele() 2113 */ 2114 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2115 need_userquota ? userquota_updates_task : dnode_rele_task, 2116 uua, 0); 2117 /* callback frees uua */ 2118 } 2119 } 2120 2121 2122 /* 2123 * Returns a pointer to data to find uid/gid from 2124 * 2125 * If a dirty record for transaction group that is syncing can't 2126 * be found then NULL is returned. In the NULL case it is assumed 2127 * the uid/gid aren't changing. 2128 */ 2129 static void * 2130 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2131 { 2132 dbuf_dirty_record_t *dr; 2133 void *data; 2134 2135 if (db->db_dirtycnt == 0) 2136 return (db->db.db_data); /* Nothing is changing */ 2137 2138 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2139 2140 if (dr == NULL) { 2141 data = NULL; 2142 } else { 2143 if (dr->dr_dnode->dn_bonuslen == 0 && 2144 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2145 data = dr->dt.dl.dr_data->b_data; 2146 else 2147 data = dr->dt.dl.dr_data; 2148 } 2149 2150 return (data); 2151 } 2152 2153 void 2154 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2155 { 2156 objset_t *os = dn->dn_objset; 2157 void *data = NULL; 2158 dmu_buf_impl_t *db = NULL; 2159 int flags = dn->dn_id_flags; 2160 int error; 2161 boolean_t have_spill = B_FALSE; 2162 2163 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2164 return; 2165 2166 /* 2167 * Raw receives introduce a problem with user accounting. Raw 2168 * receives cannot update the user accounting info because the 2169 * user ids and the sizes are encrypted. To guarantee that we 2170 * never end up with bad user accounting, we simply disable it 2171 * during raw receives. We also disable this for normal receives 2172 * so that an incremental raw receive may be done on top of an 2173 * existing non-raw receive. 2174 */ 2175 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2176 return; 2177 2178 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2179 DN_ID_CHKED_SPILL))) 2180 return; 2181 2182 if (before && dn->dn_bonuslen != 0) 2183 data = DN_BONUS(dn->dn_phys); 2184 else if (!before && dn->dn_bonuslen != 0) { 2185 if (dn->dn_bonus) { 2186 db = dn->dn_bonus; 2187 mutex_enter(&db->db_mtx); 2188 data = dmu_objset_userquota_find_data(db, tx); 2189 } else { 2190 data = DN_BONUS(dn->dn_phys); 2191 } 2192 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2193 int rf = 0; 2194 2195 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2196 rf |= DB_RF_HAVESTRUCT; 2197 error = dmu_spill_hold_by_dnode(dn, 2198 rf | DB_RF_MUST_SUCCEED, 2199 FTAG, (dmu_buf_t **)&db); 2200 ASSERT(error == 0); 2201 mutex_enter(&db->db_mtx); 2202 data = (before) ? db->db.db_data : 2203 dmu_objset_userquota_find_data(db, tx); 2204 have_spill = B_TRUE; 2205 } else { 2206 mutex_enter(&dn->dn_mtx); 2207 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2208 mutex_exit(&dn->dn_mtx); 2209 return; 2210 } 2211 2212 /* 2213 * Must always call the callback in case the object 2214 * type has changed and that type isn't an object type to track 2215 */ 2216 zfs_file_info_t zfi; 2217 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2218 2219 if (before) { 2220 ASSERT(data); 2221 dn->dn_olduid = zfi.zfi_user; 2222 dn->dn_oldgid = zfi.zfi_group; 2223 dn->dn_oldprojid = zfi.zfi_project; 2224 } else if (data) { 2225 dn->dn_newuid = zfi.zfi_user; 2226 dn->dn_newgid = zfi.zfi_group; 2227 dn->dn_newprojid = zfi.zfi_project; 2228 } 2229 2230 /* 2231 * Preserve existing uid/gid when the callback can't determine 2232 * what the new uid/gid are and the callback returned EEXIST. 2233 * The EEXIST error tells us to just use the existing uid/gid. 2234 * If we don't know what the old values are then just assign 2235 * them to 0, since that is a new file being created. 2236 */ 2237 if (!before && data == NULL && error == EEXIST) { 2238 if (flags & DN_ID_OLD_EXIST) { 2239 dn->dn_newuid = dn->dn_olduid; 2240 dn->dn_newgid = dn->dn_oldgid; 2241 dn->dn_newprojid = dn->dn_oldprojid; 2242 } else { 2243 dn->dn_newuid = 0; 2244 dn->dn_newgid = 0; 2245 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2246 } 2247 error = 0; 2248 } 2249 2250 if (db) 2251 mutex_exit(&db->db_mtx); 2252 2253 mutex_enter(&dn->dn_mtx); 2254 if (error == 0 && before) 2255 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2256 if (error == 0 && !before) 2257 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2258 2259 if (have_spill) { 2260 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2261 } else { 2262 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2263 } 2264 mutex_exit(&dn->dn_mtx); 2265 if (have_spill) 2266 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2267 } 2268 2269 boolean_t 2270 dmu_objset_userspace_present(objset_t *os) 2271 { 2272 return (os->os_phys->os_flags & 2273 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2274 } 2275 2276 boolean_t 2277 dmu_objset_userobjspace_present(objset_t *os) 2278 { 2279 return (os->os_phys->os_flags & 2280 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2281 } 2282 2283 boolean_t 2284 dmu_objset_projectquota_present(objset_t *os) 2285 { 2286 return (os->os_phys->os_flags & 2287 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2288 } 2289 2290 static int 2291 dmu_objset_space_upgrade(objset_t *os) 2292 { 2293 uint64_t obj; 2294 int err = 0; 2295 2296 /* 2297 * We simply need to mark every object dirty, so that it will be 2298 * synced out and now accounted. If this is called 2299 * concurrently, or if we already did some work before crashing, 2300 * that's fine, since we track each object's accounted state 2301 * independently. 2302 */ 2303 2304 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2305 dmu_tx_t *tx; 2306 dmu_buf_t *db; 2307 int objerr; 2308 2309 mutex_enter(&os->os_upgrade_lock); 2310 if (os->os_upgrade_exit) 2311 err = SET_ERROR(EINTR); 2312 mutex_exit(&os->os_upgrade_lock); 2313 if (err != 0) 2314 return (err); 2315 2316 if (issig(JUSTLOOKING) && issig(FORREAL)) 2317 return (SET_ERROR(EINTR)); 2318 2319 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2320 if (objerr != 0) 2321 continue; 2322 tx = dmu_tx_create(os); 2323 dmu_tx_hold_bonus(tx, obj); 2324 objerr = dmu_tx_assign(tx, TXG_WAIT); 2325 if (objerr != 0) { 2326 dmu_buf_rele(db, FTAG); 2327 dmu_tx_abort(tx); 2328 continue; 2329 } 2330 dmu_buf_will_dirty(db, tx); 2331 dmu_buf_rele(db, FTAG); 2332 dmu_tx_commit(tx); 2333 } 2334 return (0); 2335 } 2336 2337 static int 2338 dmu_objset_userspace_upgrade_cb(objset_t *os) 2339 { 2340 int err = 0; 2341 2342 if (dmu_objset_userspace_present(os)) 2343 return (0); 2344 if (dmu_objset_is_snapshot(os)) 2345 return (SET_ERROR(EINVAL)); 2346 if (!dmu_objset_userused_enabled(os)) 2347 return (SET_ERROR(ENOTSUP)); 2348 2349 err = dmu_objset_space_upgrade(os); 2350 if (err) 2351 return (err); 2352 2353 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2354 txg_wait_synced(dmu_objset_pool(os), 0); 2355 return (0); 2356 } 2357 2358 void 2359 dmu_objset_userspace_upgrade(objset_t *os) 2360 { 2361 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2362 } 2363 2364 static int 2365 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2366 { 2367 int err = 0; 2368 2369 if (dmu_objset_userobjspace_present(os) && 2370 dmu_objset_projectquota_present(os)) 2371 return (0); 2372 if (dmu_objset_is_snapshot(os)) 2373 return (SET_ERROR(EINVAL)); 2374 if (!dmu_objset_userused_enabled(os)) 2375 return (SET_ERROR(ENOTSUP)); 2376 if (!dmu_objset_projectquota_enabled(os) && 2377 dmu_objset_userobjspace_present(os)) 2378 return (SET_ERROR(ENOTSUP)); 2379 2380 if (dmu_objset_userobjused_enabled(os)) 2381 dmu_objset_ds(os)->ds_feature_activation[ 2382 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2383 if (dmu_objset_projectquota_enabled(os)) 2384 dmu_objset_ds(os)->ds_feature_activation[ 2385 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2386 2387 err = dmu_objset_space_upgrade(os); 2388 if (err) 2389 return (err); 2390 2391 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2392 if (dmu_objset_userobjused_enabled(os)) 2393 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2394 if (dmu_objset_projectquota_enabled(os)) 2395 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2396 2397 txg_wait_synced(dmu_objset_pool(os), 0); 2398 return (0); 2399 } 2400 2401 void 2402 dmu_objset_id_quota_upgrade(objset_t *os) 2403 { 2404 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2405 } 2406 2407 boolean_t 2408 dmu_objset_userobjspace_upgradable(objset_t *os) 2409 { 2410 return (dmu_objset_type(os) == DMU_OST_ZFS && 2411 !dmu_objset_is_snapshot(os) && 2412 dmu_objset_userobjused_enabled(os) && 2413 !dmu_objset_userobjspace_present(os) && 2414 spa_writeable(dmu_objset_spa(os))); 2415 } 2416 2417 boolean_t 2418 dmu_objset_projectquota_upgradable(objset_t *os) 2419 { 2420 return (dmu_objset_type(os) == DMU_OST_ZFS && 2421 !dmu_objset_is_snapshot(os) && 2422 dmu_objset_projectquota_enabled(os) && 2423 !dmu_objset_projectquota_present(os) && 2424 spa_writeable(dmu_objset_spa(os))); 2425 } 2426 2427 void 2428 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2429 uint64_t *usedobjsp, uint64_t *availobjsp) 2430 { 2431 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2432 usedobjsp, availobjsp); 2433 } 2434 2435 uint64_t 2436 dmu_objset_fsid_guid(objset_t *os) 2437 { 2438 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2439 } 2440 2441 void 2442 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2443 { 2444 stat->dds_type = os->os_phys->os_type; 2445 if (os->os_dsl_dataset) 2446 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2447 } 2448 2449 void 2450 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2451 { 2452 ASSERT(os->os_dsl_dataset || 2453 os->os_phys->os_type == DMU_OST_META); 2454 2455 if (os->os_dsl_dataset != NULL) 2456 dsl_dataset_stats(os->os_dsl_dataset, nv); 2457 2458 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2459 os->os_phys->os_type); 2460 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2461 dmu_objset_userspace_present(os)); 2462 } 2463 2464 int 2465 dmu_objset_is_snapshot(objset_t *os) 2466 { 2467 if (os->os_dsl_dataset != NULL) 2468 return (os->os_dsl_dataset->ds_is_snapshot); 2469 else 2470 return (B_FALSE); 2471 } 2472 2473 int 2474 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2475 boolean_t *conflict) 2476 { 2477 dsl_dataset_t *ds = os->os_dsl_dataset; 2478 uint64_t ignored; 2479 2480 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2481 return (SET_ERROR(ENOENT)); 2482 2483 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2484 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2485 MT_NORMALIZE, real, maxlen, conflict)); 2486 } 2487 2488 int 2489 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2490 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2491 { 2492 dsl_dataset_t *ds = os->os_dsl_dataset; 2493 zap_cursor_t cursor; 2494 zap_attribute_t attr; 2495 2496 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2497 2498 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2499 return (SET_ERROR(ENOENT)); 2500 2501 zap_cursor_init_serialized(&cursor, 2502 ds->ds_dir->dd_pool->dp_meta_objset, 2503 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2504 2505 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2506 zap_cursor_fini(&cursor); 2507 return (SET_ERROR(ENOENT)); 2508 } 2509 2510 if (strlen(attr.za_name) + 1 > namelen) { 2511 zap_cursor_fini(&cursor); 2512 return (SET_ERROR(ENAMETOOLONG)); 2513 } 2514 2515 (void) strlcpy(name, attr.za_name, namelen); 2516 if (idp) 2517 *idp = attr.za_first_integer; 2518 if (case_conflict) 2519 *case_conflict = attr.za_normalization_conflict; 2520 zap_cursor_advance(&cursor); 2521 *offp = zap_cursor_serialize(&cursor); 2522 zap_cursor_fini(&cursor); 2523 2524 return (0); 2525 } 2526 2527 int 2528 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2529 { 2530 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2531 } 2532 2533 int 2534 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2535 uint64_t *idp, uint64_t *offp) 2536 { 2537 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2538 zap_cursor_t cursor; 2539 zap_attribute_t attr; 2540 2541 /* there is no next dir on a snapshot! */ 2542 if (os->os_dsl_dataset->ds_object != 2543 dsl_dir_phys(dd)->dd_head_dataset_obj) 2544 return (SET_ERROR(ENOENT)); 2545 2546 zap_cursor_init_serialized(&cursor, 2547 dd->dd_pool->dp_meta_objset, 2548 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2549 2550 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2551 zap_cursor_fini(&cursor); 2552 return (SET_ERROR(ENOENT)); 2553 } 2554 2555 if (strlen(attr.za_name) + 1 > namelen) { 2556 zap_cursor_fini(&cursor); 2557 return (SET_ERROR(ENAMETOOLONG)); 2558 } 2559 2560 (void) strlcpy(name, attr.za_name, namelen); 2561 if (idp) 2562 *idp = attr.za_first_integer; 2563 zap_cursor_advance(&cursor); 2564 *offp = zap_cursor_serialize(&cursor); 2565 zap_cursor_fini(&cursor); 2566 2567 return (0); 2568 } 2569 2570 typedef struct dmu_objset_find_ctx { 2571 taskq_t *dc_tq; 2572 dsl_pool_t *dc_dp; 2573 uint64_t dc_ddobj; 2574 char *dc_ddname; /* last component of ddobj's name */ 2575 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2576 void *dc_arg; 2577 int dc_flags; 2578 kmutex_t *dc_error_lock; 2579 int *dc_error; 2580 } dmu_objset_find_ctx_t; 2581 2582 static void 2583 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2584 { 2585 dsl_pool_t *dp = dcp->dc_dp; 2586 dsl_dir_t *dd; 2587 dsl_dataset_t *ds; 2588 zap_cursor_t zc; 2589 zap_attribute_t *attr; 2590 uint64_t thisobj; 2591 int err = 0; 2592 2593 /* don't process if there already was an error */ 2594 if (*dcp->dc_error != 0) 2595 goto out; 2596 2597 /* 2598 * Note: passing the name (dc_ddname) here is optional, but it 2599 * improves performance because we don't need to call 2600 * zap_value_search() to determine the name. 2601 */ 2602 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2603 if (err != 0) 2604 goto out; 2605 2606 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2607 if (dd->dd_myname[0] == '$') { 2608 dsl_dir_rele(dd, FTAG); 2609 goto out; 2610 } 2611 2612 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2613 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2614 2615 /* 2616 * Iterate over all children. 2617 */ 2618 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2619 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2620 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2621 zap_cursor_retrieve(&zc, attr) == 0; 2622 (void) zap_cursor_advance(&zc)) { 2623 ASSERT3U(attr->za_integer_length, ==, 2624 sizeof (uint64_t)); 2625 ASSERT3U(attr->za_num_integers, ==, 1); 2626 2627 dmu_objset_find_ctx_t *child_dcp = 2628 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2629 *child_dcp = *dcp; 2630 child_dcp->dc_ddobj = attr->za_first_integer; 2631 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2632 if (dcp->dc_tq != NULL) 2633 (void) taskq_dispatch(dcp->dc_tq, 2634 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2635 else 2636 dmu_objset_find_dp_impl(child_dcp); 2637 } 2638 zap_cursor_fini(&zc); 2639 } 2640 2641 /* 2642 * Iterate over all snapshots. 2643 */ 2644 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2645 dsl_dataset_t *ds; 2646 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2647 2648 if (err == 0) { 2649 uint64_t snapobj; 2650 2651 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2652 dsl_dataset_rele(ds, FTAG); 2653 2654 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2655 zap_cursor_retrieve(&zc, attr) == 0; 2656 (void) zap_cursor_advance(&zc)) { 2657 ASSERT3U(attr->za_integer_length, ==, 2658 sizeof (uint64_t)); 2659 ASSERT3U(attr->za_num_integers, ==, 1); 2660 2661 err = dsl_dataset_hold_obj(dp, 2662 attr->za_first_integer, FTAG, &ds); 2663 if (err != 0) 2664 break; 2665 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2666 dsl_dataset_rele(ds, FTAG); 2667 if (err != 0) 2668 break; 2669 } 2670 zap_cursor_fini(&zc); 2671 } 2672 } 2673 2674 kmem_free(attr, sizeof (zap_attribute_t)); 2675 2676 if (err != 0) { 2677 dsl_dir_rele(dd, FTAG); 2678 goto out; 2679 } 2680 2681 /* 2682 * Apply to self. 2683 */ 2684 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2685 2686 /* 2687 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2688 * that the dir will remain cached, and we won't have to re-instantiate 2689 * it (which could be expensive due to finding its name via 2690 * zap_value_search()). 2691 */ 2692 dsl_dir_rele(dd, FTAG); 2693 if (err != 0) 2694 goto out; 2695 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2696 dsl_dataset_rele(ds, FTAG); 2697 2698 out: 2699 if (err != 0) { 2700 mutex_enter(dcp->dc_error_lock); 2701 /* only keep first error */ 2702 if (*dcp->dc_error == 0) 2703 *dcp->dc_error = err; 2704 mutex_exit(dcp->dc_error_lock); 2705 } 2706 2707 if (dcp->dc_ddname != NULL) 2708 spa_strfree(dcp->dc_ddname); 2709 kmem_free(dcp, sizeof (*dcp)); 2710 } 2711 2712 static void 2713 dmu_objset_find_dp_cb(void *arg) 2714 { 2715 dmu_objset_find_ctx_t *dcp = arg; 2716 dsl_pool_t *dp = dcp->dc_dp; 2717 2718 /* 2719 * We need to get a pool_config_lock here, as there are several 2720 * assert(pool_config_held) down the stack. Getting a lock via 2721 * dsl_pool_config_enter is risky, as it might be stalled by a 2722 * pending writer. This would deadlock, as the write lock can 2723 * only be granted when our parent thread gives up the lock. 2724 * The _prio interface gives us priority over a pending writer. 2725 */ 2726 dsl_pool_config_enter_prio(dp, FTAG); 2727 2728 dmu_objset_find_dp_impl(dcp); 2729 2730 dsl_pool_config_exit(dp, FTAG); 2731 } 2732 2733 /* 2734 * Find objsets under and including ddobj, call func(ds) on each. 2735 * The order for the enumeration is completely undefined. 2736 * func is called with dsl_pool_config held. 2737 */ 2738 int 2739 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2740 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2741 { 2742 int error = 0; 2743 taskq_t *tq = NULL; 2744 int ntasks; 2745 dmu_objset_find_ctx_t *dcp; 2746 kmutex_t err_lock; 2747 2748 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2749 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2750 dcp->dc_tq = NULL; 2751 dcp->dc_dp = dp; 2752 dcp->dc_ddobj = ddobj; 2753 dcp->dc_ddname = NULL; 2754 dcp->dc_func = func; 2755 dcp->dc_arg = arg; 2756 dcp->dc_flags = flags; 2757 dcp->dc_error_lock = &err_lock; 2758 dcp->dc_error = &error; 2759 2760 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2761 /* 2762 * In case a write lock is held we can't make use of 2763 * parallelism, as down the stack of the worker threads 2764 * the lock is asserted via dsl_pool_config_held. 2765 * In case of a read lock this is solved by getting a read 2766 * lock in each worker thread, which isn't possible in case 2767 * of a writer lock. So we fall back to the synchronous path 2768 * here. 2769 * In the future it might be possible to get some magic into 2770 * dsl_pool_config_held in a way that it returns true for 2771 * the worker threads so that a single lock held from this 2772 * thread suffices. For now, stay single threaded. 2773 */ 2774 dmu_objset_find_dp_impl(dcp); 2775 mutex_destroy(&err_lock); 2776 2777 return (error); 2778 } 2779 2780 ntasks = dmu_find_threads; 2781 if (ntasks == 0) 2782 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2783 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2784 INT_MAX, 0); 2785 if (tq == NULL) { 2786 kmem_free(dcp, sizeof (*dcp)); 2787 mutex_destroy(&err_lock); 2788 2789 return (SET_ERROR(ENOMEM)); 2790 } 2791 dcp->dc_tq = tq; 2792 2793 /* dcp will be freed by task */ 2794 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2795 2796 /* 2797 * PORTING: this code relies on the property of taskq_wait to wait 2798 * until no more tasks are queued and no more tasks are active. As 2799 * we always queue new tasks from within other tasks, task_wait 2800 * reliably waits for the full recursion to finish, even though we 2801 * enqueue new tasks after taskq_wait has been called. 2802 * On platforms other than illumos, taskq_wait may not have this 2803 * property. 2804 */ 2805 taskq_wait(tq); 2806 taskq_destroy(tq); 2807 mutex_destroy(&err_lock); 2808 2809 return (error); 2810 } 2811 2812 /* 2813 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2814 * The dp_config_rwlock must not be held when this is called, and it 2815 * will not be held when the callback is called. 2816 * Therefore this function should only be used when the pool is not changing 2817 * (e.g. in syncing context), or the callback can deal with the possible races. 2818 */ 2819 static int 2820 dmu_objset_find_impl(spa_t *spa, const char *name, 2821 int func(const char *, void *), void *arg, int flags) 2822 { 2823 dsl_dir_t *dd; 2824 dsl_pool_t *dp = spa_get_dsl(spa); 2825 dsl_dataset_t *ds; 2826 zap_cursor_t zc; 2827 zap_attribute_t *attr; 2828 char *child; 2829 uint64_t thisobj; 2830 int err; 2831 2832 dsl_pool_config_enter(dp, FTAG); 2833 2834 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2835 if (err != 0) { 2836 dsl_pool_config_exit(dp, FTAG); 2837 return (err); 2838 } 2839 2840 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2841 if (dd->dd_myname[0] == '$') { 2842 dsl_dir_rele(dd, FTAG); 2843 dsl_pool_config_exit(dp, FTAG); 2844 return (0); 2845 } 2846 2847 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2848 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2849 2850 /* 2851 * Iterate over all children. 2852 */ 2853 if (flags & DS_FIND_CHILDREN) { 2854 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2855 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2856 zap_cursor_retrieve(&zc, attr) == 0; 2857 (void) zap_cursor_advance(&zc)) { 2858 ASSERT3U(attr->za_integer_length, ==, 2859 sizeof (uint64_t)); 2860 ASSERT3U(attr->za_num_integers, ==, 1); 2861 2862 child = kmem_asprintf("%s/%s", name, attr->za_name); 2863 dsl_pool_config_exit(dp, FTAG); 2864 err = dmu_objset_find_impl(spa, child, 2865 func, arg, flags); 2866 dsl_pool_config_enter(dp, FTAG); 2867 kmem_strfree(child); 2868 if (err != 0) 2869 break; 2870 } 2871 zap_cursor_fini(&zc); 2872 2873 if (err != 0) { 2874 dsl_dir_rele(dd, FTAG); 2875 dsl_pool_config_exit(dp, FTAG); 2876 kmem_free(attr, sizeof (zap_attribute_t)); 2877 return (err); 2878 } 2879 } 2880 2881 /* 2882 * Iterate over all snapshots. 2883 */ 2884 if (flags & DS_FIND_SNAPSHOTS) { 2885 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2886 2887 if (err == 0) { 2888 uint64_t snapobj; 2889 2890 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2891 dsl_dataset_rele(ds, FTAG); 2892 2893 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2894 zap_cursor_retrieve(&zc, attr) == 0; 2895 (void) zap_cursor_advance(&zc)) { 2896 ASSERT3U(attr->za_integer_length, ==, 2897 sizeof (uint64_t)); 2898 ASSERT3U(attr->za_num_integers, ==, 1); 2899 2900 child = kmem_asprintf("%s@%s", 2901 name, attr->za_name); 2902 dsl_pool_config_exit(dp, FTAG); 2903 err = func(child, arg); 2904 dsl_pool_config_enter(dp, FTAG); 2905 kmem_strfree(child); 2906 if (err != 0) 2907 break; 2908 } 2909 zap_cursor_fini(&zc); 2910 } 2911 } 2912 2913 dsl_dir_rele(dd, FTAG); 2914 kmem_free(attr, sizeof (zap_attribute_t)); 2915 dsl_pool_config_exit(dp, FTAG); 2916 2917 if (err != 0) 2918 return (err); 2919 2920 /* Apply to self. */ 2921 return (func(name, arg)); 2922 } 2923 2924 /* 2925 * See comment above dmu_objset_find_impl(). 2926 */ 2927 int 2928 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2929 int flags) 2930 { 2931 spa_t *spa; 2932 int error; 2933 2934 error = spa_open(name, &spa, FTAG); 2935 if (error != 0) 2936 return (error); 2937 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2938 spa_close(spa, FTAG); 2939 return (error); 2940 } 2941 2942 boolean_t 2943 dmu_objset_incompatible_encryption_version(objset_t *os) 2944 { 2945 return (dsl_dir_incompatible_encryption_version( 2946 os->os_dsl_dataset->ds_dir)); 2947 } 2948 2949 void 2950 dmu_objset_set_user(objset_t *os, void *user_ptr) 2951 { 2952 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2953 os->os_user_ptr = user_ptr; 2954 } 2955 2956 void * 2957 dmu_objset_get_user(objset_t *os) 2958 { 2959 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2960 return (os->os_user_ptr); 2961 } 2962 2963 /* 2964 * Determine name of filesystem, given name of snapshot. 2965 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 2966 */ 2967 int 2968 dmu_fsname(const char *snapname, char *buf) 2969 { 2970 char *atp = strchr(snapname, '@'); 2971 if (atp == NULL) 2972 return (SET_ERROR(EINVAL)); 2973 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 2974 return (SET_ERROR(ENAMETOOLONG)); 2975 (void) strlcpy(buf, snapname, atp - snapname + 1); 2976 return (0); 2977 } 2978 2979 /* 2980 * Call when we think we're going to write/free space in open context 2981 * to track the amount of dirty data in the open txg, which is also the 2982 * amount of memory that can not be evicted until this txg syncs. 2983 * 2984 * Note that there are two conditions where this can be called from 2985 * syncing context: 2986 * 2987 * [1] When we just created the dataset, in which case we go on with 2988 * updating any accounting of dirty data as usual. 2989 * [2] When we are dirtying MOS data, in which case we only update the 2990 * pool's accounting of dirty data. 2991 */ 2992 void 2993 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 2994 { 2995 dsl_dataset_t *ds = os->os_dsl_dataset; 2996 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 2997 2998 if (ds != NULL) { 2999 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3000 } 3001 3002 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3003 } 3004 3005 #if defined(_KERNEL) 3006 EXPORT_SYMBOL(dmu_objset_zil); 3007 EXPORT_SYMBOL(dmu_objset_pool); 3008 EXPORT_SYMBOL(dmu_objset_ds); 3009 EXPORT_SYMBOL(dmu_objset_type); 3010 EXPORT_SYMBOL(dmu_objset_name); 3011 EXPORT_SYMBOL(dmu_objset_hold); 3012 EXPORT_SYMBOL(dmu_objset_hold_flags); 3013 EXPORT_SYMBOL(dmu_objset_own); 3014 EXPORT_SYMBOL(dmu_objset_rele); 3015 EXPORT_SYMBOL(dmu_objset_rele_flags); 3016 EXPORT_SYMBOL(dmu_objset_disown); 3017 EXPORT_SYMBOL(dmu_objset_from_ds); 3018 EXPORT_SYMBOL(dmu_objset_create); 3019 EXPORT_SYMBOL(dmu_objset_clone); 3020 EXPORT_SYMBOL(dmu_objset_stats); 3021 EXPORT_SYMBOL(dmu_objset_fast_stat); 3022 EXPORT_SYMBOL(dmu_objset_spa); 3023 EXPORT_SYMBOL(dmu_objset_space); 3024 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3025 EXPORT_SYMBOL(dmu_objset_find); 3026 EXPORT_SYMBOL(dmu_objset_byteswap); 3027 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3028 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3029 EXPORT_SYMBOL(dmu_objset_dnodesize); 3030 3031 EXPORT_SYMBOL(dmu_objset_sync); 3032 EXPORT_SYMBOL(dmu_objset_is_dirty); 3033 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3034 EXPORT_SYMBOL(dmu_objset_create_impl); 3035 EXPORT_SYMBOL(dmu_objset_open_impl); 3036 EXPORT_SYMBOL(dmu_objset_evict); 3037 EXPORT_SYMBOL(dmu_objset_register_type); 3038 EXPORT_SYMBOL(dmu_objset_sync_done); 3039 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3040 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3041 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3042 EXPORT_SYMBOL(dmu_objset_userspace_present); 3043 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3044 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3045 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3046 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3047 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3048 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3049 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3050 #endif 3051