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 #include <sys/vdev_impl.h> 67 #include <sys/arc.h> 68 69 /* 70 * Needed to close a window in dnode_move() that allows the objset to be freed 71 * before it can be safely accessed. 72 */ 73 krwlock_t os_lock; 74 75 /* 76 * Tunable to overwrite the maximum number of threads for the parallelization 77 * of dmu_objset_find_dp, needed to speed up the import of pools with many 78 * datasets. 79 * Default is 4 times the number of leaf vdevs. 80 */ 81 static const int dmu_find_threads = 0; 82 83 /* 84 * Backfill lower metadnode objects after this many have been freed. 85 * Backfilling negatively impacts object creation rates, so only do it 86 * if there are enough holes to fill. 87 */ 88 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 89 90 static const char *upgrade_tag = "upgrade_tag"; 91 92 static void dmu_objset_find_dp_cb(void *arg); 93 94 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 95 static void dmu_objset_upgrade_stop(objset_t *os); 96 97 void 98 dmu_objset_init(void) 99 { 100 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 101 } 102 103 void 104 dmu_objset_fini(void) 105 { 106 rw_destroy(&os_lock); 107 } 108 109 spa_t * 110 dmu_objset_spa(objset_t *os) 111 { 112 return (os->os_spa); 113 } 114 115 zilog_t * 116 dmu_objset_zil(objset_t *os) 117 { 118 return (os->os_zil); 119 } 120 121 dsl_pool_t * 122 dmu_objset_pool(objset_t *os) 123 { 124 dsl_dataset_t *ds; 125 126 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 127 return (ds->ds_dir->dd_pool); 128 else 129 return (spa_get_dsl(os->os_spa)); 130 } 131 132 dsl_dataset_t * 133 dmu_objset_ds(objset_t *os) 134 { 135 return (os->os_dsl_dataset); 136 } 137 138 dmu_objset_type_t 139 dmu_objset_type(objset_t *os) 140 { 141 return (os->os_phys->os_type); 142 } 143 144 void 145 dmu_objset_name(objset_t *os, char *buf) 146 { 147 dsl_dataset_name(os->os_dsl_dataset, buf); 148 } 149 150 uint64_t 151 dmu_objset_id(objset_t *os) 152 { 153 dsl_dataset_t *ds = os->os_dsl_dataset; 154 155 return (ds ? ds->ds_object : 0); 156 } 157 158 uint64_t 159 dmu_objset_dnodesize(objset_t *os) 160 { 161 return (os->os_dnodesize); 162 } 163 164 zfs_sync_type_t 165 dmu_objset_syncprop(objset_t *os) 166 { 167 return (os->os_sync); 168 } 169 170 zfs_logbias_op_t 171 dmu_objset_logbias(objset_t *os) 172 { 173 return (os->os_logbias); 174 } 175 176 static void 177 checksum_changed_cb(void *arg, uint64_t newval) 178 { 179 objset_t *os = arg; 180 181 /* 182 * Inheritance should have been done by now. 183 */ 184 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 185 186 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 187 } 188 189 static void 190 compression_changed_cb(void *arg, uint64_t newval) 191 { 192 objset_t *os = arg; 193 194 /* 195 * Inheritance and range checking should have been done by now. 196 */ 197 ASSERT(newval != ZIO_COMPRESS_INHERIT); 198 199 os->os_compress = zio_compress_select(os->os_spa, 200 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 201 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 202 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 203 } 204 205 static void 206 copies_changed_cb(void *arg, uint64_t newval) 207 { 208 objset_t *os = arg; 209 210 /* 211 * Inheritance and range checking should have been done by now. 212 */ 213 ASSERT(newval > 0); 214 ASSERT(newval <= spa_max_replication(os->os_spa)); 215 216 os->os_copies = newval; 217 } 218 219 static void 220 dedup_changed_cb(void *arg, uint64_t newval) 221 { 222 objset_t *os = arg; 223 spa_t *spa = os->os_spa; 224 enum zio_checksum checksum; 225 226 /* 227 * Inheritance should have been done by now. 228 */ 229 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 230 231 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 232 233 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 234 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 235 } 236 237 static void 238 primary_cache_changed_cb(void *arg, uint64_t newval) 239 { 240 objset_t *os = arg; 241 242 /* 243 * Inheritance and range checking should have been done by now. 244 */ 245 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 246 newval == ZFS_CACHE_METADATA); 247 248 os->os_primary_cache = newval; 249 } 250 251 static void 252 secondary_cache_changed_cb(void *arg, uint64_t newval) 253 { 254 objset_t *os = arg; 255 256 /* 257 * Inheritance and range checking should have been done by now. 258 */ 259 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 260 newval == ZFS_CACHE_METADATA); 261 262 os->os_secondary_cache = newval; 263 } 264 265 static void 266 sync_changed_cb(void *arg, uint64_t newval) 267 { 268 objset_t *os = arg; 269 270 /* 271 * Inheritance and range checking should have been done by now. 272 */ 273 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 274 newval == ZFS_SYNC_DISABLED); 275 276 os->os_sync = newval; 277 if (os->os_zil) 278 zil_set_sync(os->os_zil, newval); 279 } 280 281 static void 282 redundant_metadata_changed_cb(void *arg, uint64_t newval) 283 { 284 objset_t *os = arg; 285 286 /* 287 * Inheritance and range checking should have been done by now. 288 */ 289 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 290 newval == ZFS_REDUNDANT_METADATA_MOST); 291 292 os->os_redundant_metadata = newval; 293 } 294 295 static void 296 dnodesize_changed_cb(void *arg, uint64_t newval) 297 { 298 objset_t *os = arg; 299 300 switch (newval) { 301 case ZFS_DNSIZE_LEGACY: 302 os->os_dnodesize = DNODE_MIN_SIZE; 303 break; 304 case ZFS_DNSIZE_AUTO: 305 /* 306 * Choose a dnode size that will work well for most 307 * workloads if the user specified "auto". Future code 308 * improvements could dynamically select a dnode size 309 * based on observed workload patterns. 310 */ 311 os->os_dnodesize = DNODE_MIN_SIZE * 2; 312 break; 313 case ZFS_DNSIZE_1K: 314 case ZFS_DNSIZE_2K: 315 case ZFS_DNSIZE_4K: 316 case ZFS_DNSIZE_8K: 317 case ZFS_DNSIZE_16K: 318 os->os_dnodesize = newval; 319 break; 320 } 321 } 322 323 static void 324 smallblk_changed_cb(void *arg, uint64_t newval) 325 { 326 objset_t *os = arg; 327 328 /* 329 * Inheritance and range checking should have been done by now. 330 */ 331 ASSERT(newval <= SPA_MAXBLOCKSIZE); 332 ASSERT(ISP2(newval)); 333 334 os->os_zpl_special_smallblock = newval; 335 } 336 337 static void 338 logbias_changed_cb(void *arg, uint64_t newval) 339 { 340 objset_t *os = arg; 341 342 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 343 newval == ZFS_LOGBIAS_THROUGHPUT); 344 os->os_logbias = newval; 345 if (os->os_zil) 346 zil_set_logbias(os->os_zil, newval); 347 } 348 349 static void 350 recordsize_changed_cb(void *arg, uint64_t newval) 351 { 352 objset_t *os = arg; 353 354 os->os_recordsize = newval; 355 } 356 357 void 358 dmu_objset_byteswap(void *buf, size_t size) 359 { 360 objset_phys_t *osp = buf; 361 362 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 363 size == sizeof (objset_phys_t)); 364 dnode_byteswap(&osp->os_meta_dnode); 365 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 366 osp->os_type = BSWAP_64(osp->os_type); 367 osp->os_flags = BSWAP_64(osp->os_flags); 368 if (size >= OBJSET_PHYS_SIZE_V2) { 369 dnode_byteswap(&osp->os_userused_dnode); 370 dnode_byteswap(&osp->os_groupused_dnode); 371 if (size >= sizeof (objset_phys_t)) 372 dnode_byteswap(&osp->os_projectused_dnode); 373 } 374 } 375 376 /* 377 * The hash is a CRC-based hash of the objset_t pointer and the object number. 378 */ 379 static uint64_t 380 dnode_hash(const objset_t *os, uint64_t obj) 381 { 382 uintptr_t osv = (uintptr_t)os; 383 uint64_t crc = -1ULL; 384 385 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 386 /* 387 * The low 6 bits of the pointer don't have much entropy, because 388 * the objset_t is larger than 2^6 bytes long. 389 */ 390 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF]; 391 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF]; 392 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF]; 393 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF]; 394 395 crc ^= (osv>>14) ^ (obj>>24); 396 397 return (crc); 398 } 399 400 static unsigned int 401 dnode_multilist_index_func(multilist_t *ml, void *obj) 402 { 403 dnode_t *dn = obj; 404 405 /* 406 * The low order bits of the hash value are thought to be 407 * distributed evenly. Otherwise, in the case that the multilist 408 * has a power of two number of sublists, each sublists' usage 409 * would not be evenly distributed. In this context full 64bit 410 * division would be a waste of time, so limit it to 32 bits. 411 */ 412 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 413 multilist_get_num_sublists(ml)); 414 } 415 416 static inline boolean_t 417 dmu_os_is_l2cacheable(objset_t *os) 418 { 419 vdev_t *vd = NULL; 420 zfs_cache_type_t cache = os->os_secondary_cache; 421 blkptr_t *bp = os->os_rootbp; 422 423 if (bp != NULL && !BP_IS_HOLE(bp)) { 424 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva); 425 vdev_t *rvd = os->os_spa->spa_root_vdev; 426 427 if (vdev < rvd->vdev_children) 428 vd = rvd->vdev_child[vdev]; 429 430 if (cache == ZFS_CACHE_ALL || cache == ZFS_CACHE_METADATA) { 431 if (vd == NULL) 432 return (B_TRUE); 433 434 if ((vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL && 435 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) || 436 l2arc_exclude_special == 0) 437 return (B_TRUE); 438 } 439 } 440 441 return (B_FALSE); 442 } 443 444 /* 445 * Instantiates the objset_t in-memory structure corresponding to the 446 * objset_phys_t that's pointed to by the specified blkptr_t. 447 */ 448 int 449 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 450 objset_t **osp) 451 { 452 objset_t *os; 453 int i, err; 454 455 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 456 ASSERT(!BP_IS_REDACTED(bp)); 457 458 /* 459 * We need the pool config lock to get properties. 460 */ 461 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 462 463 /* 464 * The $ORIGIN dataset (if it exists) doesn't have an associated 465 * objset, so there's no reason to open it. The $ORIGIN dataset 466 * will not exist on pools older than SPA_VERSION_ORIGIN. 467 */ 468 if (ds != NULL && spa_get_dsl(spa) != NULL && 469 spa_get_dsl(spa)->dp_origin_snap != NULL) { 470 ASSERT3P(ds->ds_dir, !=, 471 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 472 } 473 474 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 475 os->os_dsl_dataset = ds; 476 os->os_spa = spa; 477 os->os_rootbp = bp; 478 if (!BP_IS_HOLE(os->os_rootbp)) { 479 arc_flags_t aflags = ARC_FLAG_WAIT; 480 zbookmark_phys_t zb; 481 int size; 482 enum zio_flag zio_flags = ZIO_FLAG_CANFAIL; 483 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 484 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 485 486 if (dmu_os_is_l2cacheable(os)) 487 aflags |= ARC_FLAG_L2CACHE; 488 489 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 490 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 491 ASSERT(BP_IS_AUTHENTICATED(bp)); 492 zio_flags |= ZIO_FLAG_RAW; 493 } 494 495 dprintf_bp(os->os_rootbp, "reading %s", ""); 496 err = arc_read(NULL, spa, os->os_rootbp, 497 arc_getbuf_func, &os->os_phys_buf, 498 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 499 if (err != 0) { 500 kmem_free(os, sizeof (objset_t)); 501 /* convert checksum errors into IO errors */ 502 if (err == ECKSUM) 503 err = SET_ERROR(EIO); 504 return (err); 505 } 506 507 if (spa_version(spa) < SPA_VERSION_USERSPACE) 508 size = OBJSET_PHYS_SIZE_V1; 509 else if (!spa_feature_is_enabled(spa, 510 SPA_FEATURE_PROJECT_QUOTA)) 511 size = OBJSET_PHYS_SIZE_V2; 512 else 513 size = sizeof (objset_phys_t); 514 515 /* Increase the blocksize if we are permitted. */ 516 if (arc_buf_size(os->os_phys_buf) < size) { 517 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 518 ARC_BUFC_METADATA, size); 519 bzero(buf->b_data, size); 520 bcopy(os->os_phys_buf->b_data, buf->b_data, 521 arc_buf_size(os->os_phys_buf)); 522 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 523 os->os_phys_buf = buf; 524 } 525 526 os->os_phys = os->os_phys_buf->b_data; 527 os->os_flags = os->os_phys->os_flags; 528 } else { 529 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 530 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 531 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 532 ARC_BUFC_METADATA, size); 533 os->os_phys = os->os_phys_buf->b_data; 534 bzero(os->os_phys, size); 535 } 536 /* 537 * These properties will be filled in by the logic in zfs_get_zplprop() 538 * when they are queried for the first time. 539 */ 540 os->os_version = OBJSET_PROP_UNINITIALIZED; 541 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 542 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 543 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 544 545 /* 546 * Note: the changed_cb will be called once before the register 547 * func returns, thus changing the checksum/compression from the 548 * default (fletcher2/off). Snapshots don't need to know about 549 * checksum/compression/copies. 550 */ 551 if (ds != NULL) { 552 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 553 554 err = dsl_prop_register(ds, 555 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 556 primary_cache_changed_cb, os); 557 if (err == 0) { 558 err = dsl_prop_register(ds, 559 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 560 secondary_cache_changed_cb, os); 561 } 562 if (!ds->ds_is_snapshot) { 563 if (err == 0) { 564 err = dsl_prop_register(ds, 565 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 566 checksum_changed_cb, os); 567 } 568 if (err == 0) { 569 err = dsl_prop_register(ds, 570 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 571 compression_changed_cb, os); 572 } 573 if (err == 0) { 574 err = dsl_prop_register(ds, 575 zfs_prop_to_name(ZFS_PROP_COPIES), 576 copies_changed_cb, os); 577 } 578 if (err == 0) { 579 err = dsl_prop_register(ds, 580 zfs_prop_to_name(ZFS_PROP_DEDUP), 581 dedup_changed_cb, os); 582 } 583 if (err == 0) { 584 err = dsl_prop_register(ds, 585 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 586 logbias_changed_cb, os); 587 } 588 if (err == 0) { 589 err = dsl_prop_register(ds, 590 zfs_prop_to_name(ZFS_PROP_SYNC), 591 sync_changed_cb, os); 592 } 593 if (err == 0) { 594 err = dsl_prop_register(ds, 595 zfs_prop_to_name( 596 ZFS_PROP_REDUNDANT_METADATA), 597 redundant_metadata_changed_cb, os); 598 } 599 if (err == 0) { 600 err = dsl_prop_register(ds, 601 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 602 recordsize_changed_cb, os); 603 } 604 if (err == 0) { 605 err = dsl_prop_register(ds, 606 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 607 dnodesize_changed_cb, os); 608 } 609 if (err == 0) { 610 err = dsl_prop_register(ds, 611 zfs_prop_to_name( 612 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 613 smallblk_changed_cb, os); 614 } 615 } 616 if (err != 0) { 617 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 618 kmem_free(os, sizeof (objset_t)); 619 return (err); 620 } 621 } else { 622 /* It's the meta-objset. */ 623 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 624 os->os_compress = ZIO_COMPRESS_ON; 625 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 626 os->os_encrypted = B_FALSE; 627 os->os_copies = spa_max_replication(spa); 628 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 629 os->os_dedup_verify = B_FALSE; 630 os->os_logbias = ZFS_LOGBIAS_LATENCY; 631 os->os_sync = ZFS_SYNC_STANDARD; 632 os->os_primary_cache = ZFS_CACHE_ALL; 633 os->os_secondary_cache = ZFS_CACHE_ALL; 634 os->os_dnodesize = DNODE_MIN_SIZE; 635 } 636 637 if (ds == NULL || !ds->ds_is_snapshot) 638 os->os_zil_header = os->os_phys->os_zil_header; 639 os->os_zil = zil_alloc(os, &os->os_zil_header); 640 641 for (i = 0; i < TXG_SIZE; i++) { 642 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 643 offsetof(dnode_t, dn_dirty_link[i]), 644 dnode_multilist_index_func); 645 } 646 list_create(&os->os_dnodes, sizeof (dnode_t), 647 offsetof(dnode_t, dn_link)); 648 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 649 offsetof(dmu_buf_impl_t, db_link)); 650 651 list_link_init(&os->os_evicting_node); 652 653 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 654 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 655 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 656 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 657 os->os_obj_next_percpu_len = boot_ncpus; 658 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 659 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 660 661 dnode_special_open(os, &os->os_phys->os_meta_dnode, 662 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 663 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 664 dnode_special_open(os, &os->os_phys->os_userused_dnode, 665 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 666 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 667 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 668 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 669 dnode_special_open(os, 670 &os->os_phys->os_projectused_dnode, 671 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 672 } 673 674 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 675 676 *osp = os; 677 return (0); 678 } 679 680 int 681 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 682 { 683 int err = 0; 684 685 /* 686 * We need the pool_config lock to manipulate the dsl_dataset_t. 687 * Even if the dataset is long-held, we need the pool_config lock 688 * to open the objset, as it needs to get properties. 689 */ 690 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 691 692 mutex_enter(&ds->ds_opening_lock); 693 if (ds->ds_objset == NULL) { 694 objset_t *os; 695 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 696 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 697 ds, dsl_dataset_get_blkptr(ds), &os); 698 rrw_exit(&ds->ds_bp_rwlock, FTAG); 699 700 if (err == 0) { 701 mutex_enter(&ds->ds_lock); 702 ASSERT(ds->ds_objset == NULL); 703 ds->ds_objset = os; 704 mutex_exit(&ds->ds_lock); 705 } 706 } 707 *osp = ds->ds_objset; 708 mutex_exit(&ds->ds_opening_lock); 709 return (err); 710 } 711 712 /* 713 * Holds the pool while the objset is held. Therefore only one objset 714 * can be held at a time. 715 */ 716 int 717 dmu_objset_hold_flags(const char *name, boolean_t decrypt, void *tag, 718 objset_t **osp) 719 { 720 dsl_pool_t *dp; 721 dsl_dataset_t *ds; 722 int err; 723 ds_hold_flags_t flags; 724 725 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 726 err = dsl_pool_hold(name, tag, &dp); 727 if (err != 0) 728 return (err); 729 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 730 if (err != 0) { 731 dsl_pool_rele(dp, tag); 732 return (err); 733 } 734 735 err = dmu_objset_from_ds(ds, osp); 736 if (err != 0) { 737 dsl_dataset_rele(ds, tag); 738 dsl_pool_rele(dp, tag); 739 } 740 741 return (err); 742 } 743 744 int 745 dmu_objset_hold(const char *name, void *tag, objset_t **osp) 746 { 747 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 748 } 749 750 static int 751 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 752 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 753 { 754 (void) tag; 755 756 int err = dmu_objset_from_ds(ds, osp); 757 if (err != 0) { 758 return (err); 759 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 760 return (SET_ERROR(EINVAL)); 761 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 762 return (SET_ERROR(EROFS)); 763 } else if (!readonly && decrypt && 764 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 765 return (SET_ERROR(EROFS)); 766 } 767 768 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 769 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 770 zbookmark_phys_t zb; 771 772 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 773 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 774 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 775 &zb, B_FALSE); 776 if (err != 0) 777 return (err); 778 779 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 780 } 781 782 return (0); 783 } 784 785 /* 786 * dsl_pool must not be held when this is called. 787 * Upon successful return, there will be a longhold on the dataset, 788 * and the dsl_pool will not be held. 789 */ 790 int 791 dmu_objset_own(const char *name, dmu_objset_type_t type, 792 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 793 { 794 dsl_pool_t *dp; 795 dsl_dataset_t *ds; 796 int err; 797 ds_hold_flags_t flags; 798 799 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 800 err = dsl_pool_hold(name, FTAG, &dp); 801 if (err != 0) 802 return (err); 803 err = dsl_dataset_own(dp, name, flags, tag, &ds); 804 if (err != 0) { 805 dsl_pool_rele(dp, FTAG); 806 return (err); 807 } 808 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 809 if (err != 0) { 810 dsl_dataset_disown(ds, flags, tag); 811 dsl_pool_rele(dp, FTAG); 812 return (err); 813 } 814 815 /* 816 * User accounting requires the dataset to be decrypted and rw. 817 * We also don't begin user accounting during claiming to help 818 * speed up pool import times and to keep this txg reserved 819 * completely for recovery work. 820 */ 821 if (!readonly && !dp->dp_spa->spa_claiming && 822 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 823 if (dmu_objset_userobjspace_upgradable(*osp) || 824 dmu_objset_projectquota_upgradable(*osp)) { 825 dmu_objset_id_quota_upgrade(*osp); 826 } else if (dmu_objset_userused_enabled(*osp)) { 827 dmu_objset_userspace_upgrade(*osp); 828 } 829 } 830 831 dsl_pool_rele(dp, FTAG); 832 return (0); 833 } 834 835 int 836 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 837 boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp) 838 { 839 dsl_dataset_t *ds; 840 int err; 841 ds_hold_flags_t flags; 842 843 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 844 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 845 if (err != 0) 846 return (err); 847 848 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 849 if (err != 0) { 850 dsl_dataset_disown(ds, flags, tag); 851 return (err); 852 } 853 854 return (0); 855 } 856 857 void 858 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, void *tag) 859 { 860 ds_hold_flags_t flags; 861 dsl_pool_t *dp = dmu_objset_pool(os); 862 863 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 864 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 865 dsl_pool_rele(dp, tag); 866 } 867 868 void 869 dmu_objset_rele(objset_t *os, void *tag) 870 { 871 dmu_objset_rele_flags(os, B_FALSE, tag); 872 } 873 874 /* 875 * When we are called, os MUST refer to an objset associated with a dataset 876 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 877 * == tag. We will then release and reacquire ownership of the dataset while 878 * holding the pool config_rwlock to avoid intervening namespace or ownership 879 * changes may occur. 880 * 881 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 882 * release the hold on its dataset and acquire a new one on the dataset of the 883 * same name so that it can be partially torn down and reconstructed. 884 */ 885 void 886 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 887 boolean_t decrypt, void *tag) 888 { 889 dsl_pool_t *dp; 890 char name[ZFS_MAX_DATASET_NAME_LEN]; 891 ds_hold_flags_t flags; 892 893 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 894 VERIFY3P(ds, !=, NULL); 895 VERIFY3P(ds->ds_owner, ==, tag); 896 VERIFY(dsl_dataset_long_held(ds)); 897 898 dsl_dataset_name(ds, name); 899 dp = ds->ds_dir->dd_pool; 900 dsl_pool_config_enter(dp, FTAG); 901 dsl_dataset_disown(ds, flags, tag); 902 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 903 dsl_pool_config_exit(dp, FTAG); 904 } 905 906 void 907 dmu_objset_disown(objset_t *os, boolean_t decrypt, void *tag) 908 { 909 ds_hold_flags_t flags; 910 911 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 912 /* 913 * Stop upgrading thread 914 */ 915 dmu_objset_upgrade_stop(os); 916 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 917 } 918 919 void 920 dmu_objset_evict_dbufs(objset_t *os) 921 { 922 dnode_t *dn_marker; 923 dnode_t *dn; 924 925 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 926 927 mutex_enter(&os->os_lock); 928 dn = list_head(&os->os_dnodes); 929 while (dn != NULL) { 930 /* 931 * Skip dnodes without holds. We have to do this dance 932 * because dnode_add_ref() only works if there is already a 933 * hold. If the dnode has no holds, then it has no dbufs. 934 */ 935 if (dnode_add_ref(dn, FTAG)) { 936 list_insert_after(&os->os_dnodes, dn, dn_marker); 937 mutex_exit(&os->os_lock); 938 939 dnode_evict_dbufs(dn); 940 dnode_rele(dn, FTAG); 941 942 mutex_enter(&os->os_lock); 943 dn = list_next(&os->os_dnodes, dn_marker); 944 list_remove(&os->os_dnodes, dn_marker); 945 } else { 946 dn = list_next(&os->os_dnodes, dn); 947 } 948 } 949 mutex_exit(&os->os_lock); 950 951 kmem_free(dn_marker, sizeof (dnode_t)); 952 953 if (DMU_USERUSED_DNODE(os) != NULL) { 954 if (DMU_PROJECTUSED_DNODE(os) != NULL) 955 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 956 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 957 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 958 } 959 dnode_evict_dbufs(DMU_META_DNODE(os)); 960 } 961 962 /* 963 * Objset eviction processing is split into into two pieces. 964 * The first marks the objset as evicting, evicts any dbufs that 965 * have a refcount of zero, and then queues up the objset for the 966 * second phase of eviction. Once os->os_dnodes has been cleared by 967 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 968 * The second phase closes the special dnodes, dequeues the objset from 969 * the list of those undergoing eviction, and finally frees the objset. 970 * 971 * NOTE: Due to asynchronous eviction processing (invocation of 972 * dnode_buf_pageout()), it is possible for the meta dnode for the 973 * objset to have no holds even though os->os_dnodes is not empty. 974 */ 975 void 976 dmu_objset_evict(objset_t *os) 977 { 978 dsl_dataset_t *ds = os->os_dsl_dataset; 979 980 for (int t = 0; t < TXG_SIZE; t++) 981 ASSERT(!dmu_objset_is_dirty(os, t)); 982 983 if (ds) 984 dsl_prop_unregister_all(ds, os); 985 986 if (os->os_sa) 987 sa_tear_down(os); 988 989 dmu_objset_evict_dbufs(os); 990 991 mutex_enter(&os->os_lock); 992 spa_evicting_os_register(os->os_spa, os); 993 if (list_is_empty(&os->os_dnodes)) { 994 mutex_exit(&os->os_lock); 995 dmu_objset_evict_done(os); 996 } else { 997 mutex_exit(&os->os_lock); 998 } 999 1000 1001 } 1002 1003 void 1004 dmu_objset_evict_done(objset_t *os) 1005 { 1006 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 1007 1008 dnode_special_close(&os->os_meta_dnode); 1009 if (DMU_USERUSED_DNODE(os)) { 1010 if (DMU_PROJECTUSED_DNODE(os)) 1011 dnode_special_close(&os->os_projectused_dnode); 1012 dnode_special_close(&os->os_userused_dnode); 1013 dnode_special_close(&os->os_groupused_dnode); 1014 } 1015 zil_free(os->os_zil); 1016 1017 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 1018 1019 /* 1020 * This is a barrier to prevent the objset from going away in 1021 * dnode_move() until we can safely ensure that the objset is still in 1022 * use. We consider the objset valid before the barrier and invalid 1023 * after the barrier. 1024 */ 1025 rw_enter(&os_lock, RW_READER); 1026 rw_exit(&os_lock); 1027 1028 kmem_free(os->os_obj_next_percpu, 1029 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1030 1031 mutex_destroy(&os->os_lock); 1032 mutex_destroy(&os->os_userused_lock); 1033 mutex_destroy(&os->os_obj_lock); 1034 mutex_destroy(&os->os_user_ptr_lock); 1035 mutex_destroy(&os->os_upgrade_lock); 1036 for (int i = 0; i < TXG_SIZE; i++) 1037 multilist_destroy(&os->os_dirty_dnodes[i]); 1038 spa_evicting_os_deregister(os->os_spa, os); 1039 kmem_free(os, sizeof (objset_t)); 1040 } 1041 1042 inode_timespec_t 1043 dmu_objset_snap_cmtime(objset_t *os) 1044 { 1045 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1046 } 1047 1048 objset_t * 1049 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1050 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1051 { 1052 objset_t *os; 1053 dnode_t *mdn; 1054 1055 ASSERT(dmu_tx_is_syncing(tx)); 1056 1057 if (blksz == 0) 1058 blksz = DNODE_BLOCK_SIZE; 1059 if (ibs == 0) 1060 ibs = DN_MAX_INDBLKSHIFT; 1061 1062 if (ds != NULL) 1063 VERIFY0(dmu_objset_from_ds(ds, &os)); 1064 else 1065 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1066 1067 mdn = DMU_META_DNODE(os); 1068 1069 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1070 DNODE_MIN_SLOTS, tx); 1071 1072 /* 1073 * We don't want to have to increase the meta-dnode's nlevels 1074 * later, because then we could do it in quiescing context while 1075 * we are also accessing it in open context. 1076 * 1077 * This precaution is not necessary for the MOS (ds == NULL), 1078 * because the MOS is only updated in syncing context. 1079 * This is most fortunate: the MOS is the only objset that 1080 * needs to be synced multiple times as spa_sync() iterates 1081 * to convergence, so minimizing its dn_nlevels matters. 1082 */ 1083 if (ds != NULL) { 1084 if (levels == 0) { 1085 levels = 1; 1086 1087 /* 1088 * Determine the number of levels necessary for the 1089 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1090 * that in order to ensure that we do not overflow 1091 * 64 bits, there has to be a nlevels that gives us a 1092 * number of blocks > DN_MAX_OBJECT but < 2^64. 1093 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1094 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1095 * (16). 1096 */ 1097 while ((uint64_t)mdn->dn_nblkptr << 1098 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1099 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1100 DN_MAX_OBJECT) 1101 levels++; 1102 } 1103 1104 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1105 mdn->dn_nlevels = levels; 1106 } 1107 1108 ASSERT(type != DMU_OST_NONE); 1109 ASSERT(type != DMU_OST_ANY); 1110 ASSERT(type < DMU_OST_NUMTYPES); 1111 os->os_phys->os_type = type; 1112 1113 /* 1114 * Enable user accounting if it is enabled and this is not an 1115 * encrypted receive. 1116 */ 1117 if (dmu_objset_userused_enabled(os) && 1118 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1119 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1120 if (dmu_objset_userobjused_enabled(os)) { 1121 ds->ds_feature_activation[ 1122 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1123 os->os_phys->os_flags |= 1124 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1125 } 1126 if (dmu_objset_projectquota_enabled(os)) { 1127 ds->ds_feature_activation[ 1128 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1129 os->os_phys->os_flags |= 1130 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1131 } 1132 os->os_flags = os->os_phys->os_flags; 1133 } 1134 1135 dsl_dataset_dirty(ds, tx); 1136 1137 return (os); 1138 } 1139 1140 /* called from dsl for meta-objset */ 1141 objset_t * 1142 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1143 dmu_objset_type_t type, dmu_tx_t *tx) 1144 { 1145 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1146 } 1147 1148 typedef struct dmu_objset_create_arg { 1149 const char *doca_name; 1150 cred_t *doca_cred; 1151 proc_t *doca_proc; 1152 void (*doca_userfunc)(objset_t *os, void *arg, 1153 cred_t *cr, dmu_tx_t *tx); 1154 void *doca_userarg; 1155 dmu_objset_type_t doca_type; 1156 uint64_t doca_flags; 1157 dsl_crypto_params_t *doca_dcp; 1158 } dmu_objset_create_arg_t; 1159 1160 static int 1161 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1162 { 1163 dmu_objset_create_arg_t *doca = arg; 1164 dsl_pool_t *dp = dmu_tx_pool(tx); 1165 dsl_dir_t *pdd; 1166 dsl_dataset_t *parentds; 1167 objset_t *parentos; 1168 const char *tail; 1169 int error; 1170 1171 if (strchr(doca->doca_name, '@') != NULL) 1172 return (SET_ERROR(EINVAL)); 1173 1174 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1175 return (SET_ERROR(ENAMETOOLONG)); 1176 1177 if (dataset_nestcheck(doca->doca_name) != 0) 1178 return (SET_ERROR(ENAMETOOLONG)); 1179 1180 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1181 if (error != 0) 1182 return (error); 1183 if (tail == NULL) { 1184 dsl_dir_rele(pdd, FTAG); 1185 return (SET_ERROR(EEXIST)); 1186 } 1187 1188 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1189 if (error != 0) { 1190 dsl_dir_rele(pdd, FTAG); 1191 return (error); 1192 } 1193 1194 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1195 doca->doca_cred, doca->doca_proc); 1196 if (error != 0) { 1197 dsl_dir_rele(pdd, FTAG); 1198 return (error); 1199 } 1200 1201 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1202 error = dsl_dataset_hold_obj(pdd->dd_pool, 1203 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1204 if (error != 0) { 1205 dsl_dir_rele(pdd, FTAG); 1206 return (error); 1207 } 1208 error = dmu_objset_from_ds(parentds, &parentos); 1209 if (error != 0) { 1210 dsl_dataset_rele(parentds, FTAG); 1211 dsl_dir_rele(pdd, FTAG); 1212 return (error); 1213 } 1214 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1215 dsl_dataset_rele(parentds, FTAG); 1216 dsl_dir_rele(pdd, FTAG); 1217 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1218 } 1219 dsl_dataset_rele(parentds, FTAG); 1220 dsl_dir_rele(pdd, FTAG); 1221 1222 return (error); 1223 } 1224 1225 static void 1226 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1227 { 1228 dmu_objset_create_arg_t *doca = arg; 1229 dsl_pool_t *dp = dmu_tx_pool(tx); 1230 spa_t *spa = dp->dp_spa; 1231 dsl_dir_t *pdd; 1232 const char *tail; 1233 dsl_dataset_t *ds; 1234 uint64_t obj; 1235 blkptr_t *bp; 1236 objset_t *os; 1237 zio_t *rzio; 1238 1239 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1240 1241 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1242 doca->doca_cred, doca->doca_dcp, tx); 1243 1244 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1245 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1246 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1247 bp = dsl_dataset_get_blkptr(ds); 1248 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1249 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1250 1251 if (doca->doca_userfunc != NULL) { 1252 doca->doca_userfunc(os, doca->doca_userarg, 1253 doca->doca_cred, tx); 1254 } 1255 1256 /* 1257 * The doca_userfunc() may write out some data that needs to be 1258 * encrypted if the dataset is encrypted (specifically the root 1259 * directory). This data must be written out before the encryption 1260 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1261 * I/O to occur immediately by invoking the relevant sections of 1262 * dsl_pool_sync(). 1263 */ 1264 if (os->os_encrypted) { 1265 dsl_dataset_t *tmpds = NULL; 1266 boolean_t need_sync_done = B_FALSE; 1267 1268 mutex_enter(&ds->ds_lock); 1269 ds->ds_owner = FTAG; 1270 mutex_exit(&ds->ds_lock); 1271 1272 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1273 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1274 tx->tx_txg); 1275 if (tmpds != NULL) { 1276 dsl_dataset_sync(ds, rzio, tx); 1277 need_sync_done = B_TRUE; 1278 } 1279 VERIFY0(zio_wait(rzio)); 1280 1281 dmu_objset_sync_done(os, tx); 1282 taskq_wait(dp->dp_sync_taskq); 1283 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1284 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1285 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1286 } 1287 1288 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1289 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1290 tx->tx_txg); 1291 if (tmpds != NULL) { 1292 dmu_buf_rele(ds->ds_dbuf, ds); 1293 dsl_dataset_sync(ds, rzio, tx); 1294 } 1295 VERIFY0(zio_wait(rzio)); 1296 1297 if (need_sync_done) { 1298 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1299 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1300 dsl_dataset_sync_done(ds, tx); 1301 } 1302 1303 mutex_enter(&ds->ds_lock); 1304 ds->ds_owner = NULL; 1305 mutex_exit(&ds->ds_lock); 1306 } 1307 1308 spa_history_log_internal_ds(ds, "create", tx, " "); 1309 1310 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1311 dsl_dir_rele(pdd, FTAG); 1312 } 1313 1314 int 1315 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1316 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1317 { 1318 dmu_objset_create_arg_t doca; 1319 dsl_crypto_params_t tmp_dcp = { 0 }; 1320 1321 doca.doca_name = name; 1322 doca.doca_cred = CRED(); 1323 doca.doca_proc = curproc; 1324 doca.doca_flags = flags; 1325 doca.doca_userfunc = func; 1326 doca.doca_userarg = arg; 1327 doca.doca_type = type; 1328 1329 /* 1330 * Some callers (mostly for testing) do not provide a dcp on their 1331 * own but various code inside the sync task will require it to be 1332 * allocated. Rather than adding NULL checks throughout this code 1333 * or adding dummy dcp's to all of the callers we simply create a 1334 * dummy one here and use that. This zero dcp will have the same 1335 * effect as asking for inheritance of all encryption params. 1336 */ 1337 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1338 1339 int rv = dsl_sync_task(name, 1340 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1341 6, ZFS_SPACE_CHECK_NORMAL); 1342 1343 if (rv == 0) 1344 zvol_create_minor(name); 1345 return (rv); 1346 } 1347 1348 typedef struct dmu_objset_clone_arg { 1349 const char *doca_clone; 1350 const char *doca_origin; 1351 cred_t *doca_cred; 1352 proc_t *doca_proc; 1353 } dmu_objset_clone_arg_t; 1354 1355 static int 1356 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1357 { 1358 dmu_objset_clone_arg_t *doca = arg; 1359 dsl_dir_t *pdd; 1360 const char *tail; 1361 int error; 1362 dsl_dataset_t *origin; 1363 dsl_pool_t *dp = dmu_tx_pool(tx); 1364 1365 if (strchr(doca->doca_clone, '@') != NULL) 1366 return (SET_ERROR(EINVAL)); 1367 1368 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1369 return (SET_ERROR(ENAMETOOLONG)); 1370 1371 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1372 if (error != 0) 1373 return (error); 1374 if (tail == NULL) { 1375 dsl_dir_rele(pdd, FTAG); 1376 return (SET_ERROR(EEXIST)); 1377 } 1378 1379 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1380 doca->doca_cred, doca->doca_proc); 1381 if (error != 0) { 1382 dsl_dir_rele(pdd, FTAG); 1383 return (SET_ERROR(EDQUOT)); 1384 } 1385 1386 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1387 if (error != 0) { 1388 dsl_dir_rele(pdd, FTAG); 1389 return (error); 1390 } 1391 1392 /* You can only clone snapshots, not the head datasets. */ 1393 if (!origin->ds_is_snapshot) { 1394 dsl_dataset_rele(origin, FTAG); 1395 dsl_dir_rele(pdd, FTAG); 1396 return (SET_ERROR(EINVAL)); 1397 } 1398 1399 dsl_dataset_rele(origin, FTAG); 1400 dsl_dir_rele(pdd, FTAG); 1401 1402 return (0); 1403 } 1404 1405 static void 1406 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1407 { 1408 dmu_objset_clone_arg_t *doca = arg; 1409 dsl_pool_t *dp = dmu_tx_pool(tx); 1410 dsl_dir_t *pdd; 1411 const char *tail; 1412 dsl_dataset_t *origin, *ds; 1413 uint64_t obj; 1414 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1415 1416 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1417 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1418 1419 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1420 doca->doca_cred, NULL, tx); 1421 1422 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1423 dsl_dataset_name(origin, namebuf); 1424 spa_history_log_internal_ds(ds, "clone", tx, 1425 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1426 dsl_dataset_rele(ds, FTAG); 1427 dsl_dataset_rele(origin, FTAG); 1428 dsl_dir_rele(pdd, FTAG); 1429 } 1430 1431 int 1432 dmu_objset_clone(const char *clone, const char *origin) 1433 { 1434 dmu_objset_clone_arg_t doca; 1435 1436 doca.doca_clone = clone; 1437 doca.doca_origin = origin; 1438 doca.doca_cred = CRED(); 1439 doca.doca_proc = curproc; 1440 1441 int rv = dsl_sync_task(clone, 1442 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1443 6, ZFS_SPACE_CHECK_NORMAL); 1444 1445 if (rv == 0) 1446 zvol_create_minor(clone); 1447 1448 return (rv); 1449 } 1450 1451 int 1452 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1453 { 1454 int err; 1455 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1456 nvlist_t *snaps = fnvlist_alloc(); 1457 1458 fnvlist_add_boolean(snaps, longsnap); 1459 kmem_strfree(longsnap); 1460 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1461 fnvlist_free(snaps); 1462 return (err); 1463 } 1464 1465 static void 1466 dmu_objset_upgrade_task_cb(void *data) 1467 { 1468 objset_t *os = data; 1469 1470 mutex_enter(&os->os_upgrade_lock); 1471 os->os_upgrade_status = EINTR; 1472 if (!os->os_upgrade_exit) { 1473 int status; 1474 1475 mutex_exit(&os->os_upgrade_lock); 1476 1477 status = os->os_upgrade_cb(os); 1478 1479 mutex_enter(&os->os_upgrade_lock); 1480 1481 os->os_upgrade_status = status; 1482 } 1483 os->os_upgrade_exit = B_TRUE; 1484 os->os_upgrade_id = 0; 1485 mutex_exit(&os->os_upgrade_lock); 1486 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1487 } 1488 1489 static void 1490 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1491 { 1492 if (os->os_upgrade_id != 0) 1493 return; 1494 1495 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1496 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1497 1498 mutex_enter(&os->os_upgrade_lock); 1499 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1500 os->os_upgrade_exit = B_FALSE; 1501 os->os_upgrade_cb = cb; 1502 os->os_upgrade_id = taskq_dispatch( 1503 os->os_spa->spa_upgrade_taskq, 1504 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1505 if (os->os_upgrade_id == TASKQID_INVALID) { 1506 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1507 os->os_upgrade_status = ENOMEM; 1508 } 1509 } else { 1510 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1511 } 1512 mutex_exit(&os->os_upgrade_lock); 1513 } 1514 1515 static void 1516 dmu_objset_upgrade_stop(objset_t *os) 1517 { 1518 mutex_enter(&os->os_upgrade_lock); 1519 os->os_upgrade_exit = B_TRUE; 1520 if (os->os_upgrade_id != 0) { 1521 taskqid_t id = os->os_upgrade_id; 1522 1523 os->os_upgrade_id = 0; 1524 mutex_exit(&os->os_upgrade_lock); 1525 1526 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1527 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1528 } 1529 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1530 } else { 1531 mutex_exit(&os->os_upgrade_lock); 1532 } 1533 } 1534 1535 static void 1536 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1537 { 1538 dnode_t *dn; 1539 1540 while ((dn = multilist_sublist_head(list)) != NULL) { 1541 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1542 ASSERT(dn->dn_dbuf->db_data_pending); 1543 /* 1544 * Initialize dn_zio outside dnode_sync() because the 1545 * meta-dnode needs to set it outside dnode_sync(). 1546 */ 1547 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1548 ASSERT(dn->dn_zio); 1549 1550 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1551 multilist_sublist_remove(list, dn); 1552 1553 /* 1554 * See the comment above dnode_rele_task() for an explanation 1555 * of why this dnode hold is always needed (even when not 1556 * doing user accounting). 1557 */ 1558 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1559 (void) dnode_add_ref(dn, newlist); 1560 multilist_insert(newlist, dn); 1561 1562 dnode_sync(dn, tx); 1563 } 1564 } 1565 1566 static void 1567 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1568 { 1569 (void) abuf; 1570 blkptr_t *bp = zio->io_bp; 1571 objset_t *os = arg; 1572 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1573 uint64_t fill = 0; 1574 1575 ASSERT(!BP_IS_EMBEDDED(bp)); 1576 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1577 ASSERT0(BP_GET_LEVEL(bp)); 1578 1579 /* 1580 * Update rootbp fill count: it should be the number of objects 1581 * allocated in the object set (not counting the "special" 1582 * objects that are stored in the objset_phys_t -- the meta 1583 * dnode and user/group/project accounting objects). 1584 */ 1585 for (int i = 0; i < dnp->dn_nblkptr; i++) 1586 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1587 1588 BP_SET_FILL(bp, fill); 1589 1590 if (os->os_dsl_dataset != NULL) 1591 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1592 *os->os_rootbp = *bp; 1593 if (os->os_dsl_dataset != NULL) 1594 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1595 } 1596 1597 static void 1598 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1599 { 1600 (void) abuf; 1601 blkptr_t *bp = zio->io_bp; 1602 blkptr_t *bp_orig = &zio->io_bp_orig; 1603 objset_t *os = arg; 1604 1605 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1606 ASSERT(BP_EQUAL(bp, bp_orig)); 1607 } else { 1608 dsl_dataset_t *ds = os->os_dsl_dataset; 1609 dmu_tx_t *tx = os->os_synctx; 1610 1611 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1612 dsl_dataset_block_born(ds, bp, tx); 1613 } 1614 kmem_free(bp, sizeof (*bp)); 1615 } 1616 1617 typedef struct sync_dnodes_arg { 1618 multilist_t *sda_list; 1619 int sda_sublist_idx; 1620 multilist_t *sda_newlist; 1621 dmu_tx_t *sda_tx; 1622 } sync_dnodes_arg_t; 1623 1624 static void 1625 sync_dnodes_task(void *arg) 1626 { 1627 sync_dnodes_arg_t *sda = arg; 1628 1629 multilist_sublist_t *ms = 1630 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1631 1632 dmu_objset_sync_dnodes(ms, sda->sda_tx); 1633 1634 multilist_sublist_unlock(ms); 1635 1636 kmem_free(sda, sizeof (*sda)); 1637 } 1638 1639 1640 /* called from dsl */ 1641 void 1642 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1643 { 1644 int txgoff; 1645 zbookmark_phys_t zb; 1646 zio_prop_t zp; 1647 zio_t *zio; 1648 list_t *list; 1649 dbuf_dirty_record_t *dr; 1650 int num_sublists; 1651 multilist_t *ml; 1652 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1653 *blkptr_copy = *os->os_rootbp; 1654 1655 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1656 1657 ASSERT(dmu_tx_is_syncing(tx)); 1658 /* XXX the write_done callback should really give us the tx... */ 1659 os->os_synctx = tx; 1660 1661 if (os->os_dsl_dataset == NULL) { 1662 /* 1663 * This is the MOS. If we have upgraded, 1664 * spa_max_replication() could change, so reset 1665 * os_copies here. 1666 */ 1667 os->os_copies = spa_max_replication(os->os_spa); 1668 } 1669 1670 /* 1671 * Create the root block IO 1672 */ 1673 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1674 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1675 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1676 arc_release(os->os_phys_buf, &os->os_phys_buf); 1677 1678 dmu_write_policy(os, NULL, 0, 0, &zp); 1679 1680 /* 1681 * If we are either claiming the ZIL or doing a raw receive, write 1682 * out the os_phys_buf raw. Neither of these actions will effect the 1683 * MAC at this point. 1684 */ 1685 if (os->os_raw_receive || 1686 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1687 ASSERT(os->os_encrypted); 1688 arc_convert_to_raw(os->os_phys_buf, 1689 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1690 DMU_OT_OBJSET, NULL, NULL, NULL); 1691 } 1692 1693 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1694 blkptr_copy, os->os_phys_buf, dmu_os_is_l2cacheable(os), 1695 &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done, 1696 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1697 1698 /* 1699 * Sync special dnodes - the parent IO for the sync is the root block 1700 */ 1701 DMU_META_DNODE(os)->dn_zio = zio; 1702 dnode_sync(DMU_META_DNODE(os), tx); 1703 1704 os->os_phys->os_flags = os->os_flags; 1705 1706 if (DMU_USERUSED_DNODE(os) && 1707 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1708 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1709 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1710 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1711 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1712 } 1713 1714 if (DMU_PROJECTUSED_DNODE(os) && 1715 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1716 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1717 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1718 } 1719 1720 txgoff = tx->tx_txg & TXG_MASK; 1721 1722 /* 1723 * We must create the list here because it uses the 1724 * dn_dirty_link[] of this txg. But it may already 1725 * exist because we call dsl_dataset_sync() twice per txg. 1726 */ 1727 if (os->os_synced_dnodes.ml_sublists == NULL) { 1728 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1729 offsetof(dnode_t, dn_dirty_link[txgoff]), 1730 dnode_multilist_index_func); 1731 } else { 1732 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1733 offsetof(dnode_t, dn_dirty_link[txgoff])); 1734 } 1735 1736 ml = &os->os_dirty_dnodes[txgoff]; 1737 num_sublists = multilist_get_num_sublists(ml); 1738 for (int i = 0; i < num_sublists; i++) { 1739 if (multilist_sublist_is_empty_idx(ml, i)) 1740 continue; 1741 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1742 sda->sda_list = ml; 1743 sda->sda_sublist_idx = i; 1744 sda->sda_tx = tx; 1745 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1746 sync_dnodes_task, sda, 0); 1747 /* callback frees sda */ 1748 } 1749 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1750 1751 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1752 while ((dr = list_head(list)) != NULL) { 1753 ASSERT0(dr->dr_dbuf->db_level); 1754 list_remove(list, dr); 1755 zio_nowait(dr->dr_zio); 1756 } 1757 1758 /* Enable dnode backfill if enough objects have been freed. */ 1759 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1760 os->os_rescan_dnodes = B_TRUE; 1761 os->os_freed_dnodes = 0; 1762 } 1763 1764 /* 1765 * Free intent log blocks up to this tx. 1766 */ 1767 zil_sync(os->os_zil, tx); 1768 os->os_phys->os_zil_header = os->os_zil_header; 1769 zio_nowait(zio); 1770 } 1771 1772 boolean_t 1773 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1774 { 1775 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1776 } 1777 1778 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1779 1780 void 1781 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1782 { 1783 file_cbs[ost] = cb; 1784 } 1785 1786 int 1787 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1788 zfs_file_info_t *zfi) 1789 { 1790 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1791 if (cb == NULL) 1792 return (EINVAL); 1793 return (cb(bonustype, data, zfi)); 1794 } 1795 1796 boolean_t 1797 dmu_objset_userused_enabled(objset_t *os) 1798 { 1799 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1800 file_cbs[os->os_phys->os_type] != NULL && 1801 DMU_USERUSED_DNODE(os) != NULL); 1802 } 1803 1804 boolean_t 1805 dmu_objset_userobjused_enabled(objset_t *os) 1806 { 1807 return (dmu_objset_userused_enabled(os) && 1808 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1809 } 1810 1811 boolean_t 1812 dmu_objset_projectquota_enabled(objset_t *os) 1813 { 1814 return (file_cbs[os->os_phys->os_type] != NULL && 1815 DMU_PROJECTUSED_DNODE(os) != NULL && 1816 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1817 } 1818 1819 typedef struct userquota_node { 1820 /* must be in the first filed, see userquota_update_cache() */ 1821 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1822 int64_t uqn_delta; 1823 avl_node_t uqn_node; 1824 } userquota_node_t; 1825 1826 typedef struct userquota_cache { 1827 avl_tree_t uqc_user_deltas; 1828 avl_tree_t uqc_group_deltas; 1829 avl_tree_t uqc_project_deltas; 1830 } userquota_cache_t; 1831 1832 static int 1833 userquota_compare(const void *l, const void *r) 1834 { 1835 const userquota_node_t *luqn = l; 1836 const userquota_node_t *ruqn = r; 1837 int rv; 1838 1839 /* 1840 * NB: can only access uqn_id because userquota_update_cache() doesn't 1841 * pass in an entire userquota_node_t. 1842 */ 1843 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1844 1845 return (TREE_ISIGN(rv)); 1846 } 1847 1848 static void 1849 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1850 { 1851 void *cookie; 1852 userquota_node_t *uqn; 1853 1854 ASSERT(dmu_tx_is_syncing(tx)); 1855 1856 cookie = NULL; 1857 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1858 &cookie)) != NULL) { 1859 /* 1860 * os_userused_lock protects against concurrent calls to 1861 * zap_increment_int(). It's needed because zap_increment_int() 1862 * is not thread-safe (i.e. not atomic). 1863 */ 1864 mutex_enter(&os->os_userused_lock); 1865 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1866 uqn->uqn_id, uqn->uqn_delta, tx)); 1867 mutex_exit(&os->os_userused_lock); 1868 kmem_free(uqn, sizeof (*uqn)); 1869 } 1870 avl_destroy(&cache->uqc_user_deltas); 1871 1872 cookie = NULL; 1873 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1874 &cookie)) != NULL) { 1875 mutex_enter(&os->os_userused_lock); 1876 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1877 uqn->uqn_id, uqn->uqn_delta, tx)); 1878 mutex_exit(&os->os_userused_lock); 1879 kmem_free(uqn, sizeof (*uqn)); 1880 } 1881 avl_destroy(&cache->uqc_group_deltas); 1882 1883 if (dmu_objset_projectquota_enabled(os)) { 1884 cookie = NULL; 1885 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1886 &cookie)) != NULL) { 1887 mutex_enter(&os->os_userused_lock); 1888 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1889 uqn->uqn_id, uqn->uqn_delta, tx)); 1890 mutex_exit(&os->os_userused_lock); 1891 kmem_free(uqn, sizeof (*uqn)); 1892 } 1893 avl_destroy(&cache->uqc_project_deltas); 1894 } 1895 } 1896 1897 static void 1898 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1899 { 1900 userquota_node_t *uqn; 1901 avl_index_t idx; 1902 1903 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1904 /* 1905 * Use id directly for searching because uqn_id is the first field of 1906 * userquota_node_t and fields after uqn_id won't be accessed in 1907 * avl_find(). 1908 */ 1909 uqn = avl_find(avl, (const void *)id, &idx); 1910 if (uqn == NULL) { 1911 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1912 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1913 avl_insert(avl, uqn, idx); 1914 } 1915 uqn->uqn_delta += delta; 1916 } 1917 1918 static void 1919 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1920 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1921 boolean_t subtract) 1922 { 1923 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1924 int64_t delta = DNODE_MIN_SIZE + used; 1925 char name[20]; 1926 1927 if (subtract) 1928 delta = -delta; 1929 1930 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1931 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1932 1933 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1934 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1935 1936 if (dmu_objset_projectquota_enabled(os)) { 1937 (void) snprintf(name, sizeof (name), "%llx", 1938 (longlong_t)project); 1939 userquota_update_cache(&cache->uqc_project_deltas, 1940 name, delta); 1941 } 1942 } 1943 } 1944 1945 static void 1946 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1947 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1948 { 1949 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1950 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1951 int delta = subtract ? -1 : 1; 1952 1953 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1954 (longlong_t)user); 1955 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1956 1957 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1958 (longlong_t)group); 1959 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1960 1961 if (dmu_objset_projectquota_enabled(os)) { 1962 (void) snprintf(name, sizeof (name), 1963 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1964 userquota_update_cache(&cache->uqc_project_deltas, 1965 name, delta); 1966 } 1967 } 1968 } 1969 1970 typedef struct userquota_updates_arg { 1971 objset_t *uua_os; 1972 int uua_sublist_idx; 1973 dmu_tx_t *uua_tx; 1974 } userquota_updates_arg_t; 1975 1976 static void 1977 userquota_updates_task(void *arg) 1978 { 1979 userquota_updates_arg_t *uua = arg; 1980 objset_t *os = uua->uua_os; 1981 dmu_tx_t *tx = uua->uua_tx; 1982 dnode_t *dn; 1983 userquota_cache_t cache = { { 0 } }; 1984 1985 multilist_sublist_t *list = 1986 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 1987 1988 ASSERT(multilist_sublist_head(list) == NULL || 1989 dmu_objset_userused_enabled(os)); 1990 avl_create(&cache.uqc_user_deltas, userquota_compare, 1991 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1992 avl_create(&cache.uqc_group_deltas, userquota_compare, 1993 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 1994 if (dmu_objset_projectquota_enabled(os)) 1995 avl_create(&cache.uqc_project_deltas, userquota_compare, 1996 sizeof (userquota_node_t), offsetof(userquota_node_t, 1997 uqn_node)); 1998 1999 while ((dn = multilist_sublist_head(list)) != NULL) { 2000 int flags; 2001 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2002 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2003 dn->dn_phys->dn_flags & 2004 DNODE_FLAG_USERUSED_ACCOUNTED); 2005 2006 flags = dn->dn_id_flags; 2007 ASSERT(flags); 2008 if (flags & DN_ID_OLD_EXIST) { 2009 do_userquota_update(os, &cache, dn->dn_oldused, 2010 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2011 dn->dn_oldprojid, B_TRUE); 2012 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2013 dn->dn_olduid, dn->dn_oldgid, 2014 dn->dn_oldprojid, B_TRUE); 2015 } 2016 if (flags & DN_ID_NEW_EXIST) { 2017 do_userquota_update(os, &cache, 2018 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2019 dn->dn_newuid, dn->dn_newgid, 2020 dn->dn_newprojid, B_FALSE); 2021 do_userobjquota_update(os, &cache, 2022 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2023 dn->dn_newprojid, B_FALSE); 2024 } 2025 2026 mutex_enter(&dn->dn_mtx); 2027 dn->dn_oldused = 0; 2028 dn->dn_oldflags = 0; 2029 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2030 dn->dn_olduid = dn->dn_newuid; 2031 dn->dn_oldgid = dn->dn_newgid; 2032 dn->dn_oldprojid = dn->dn_newprojid; 2033 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2034 if (dn->dn_bonuslen == 0) 2035 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2036 else 2037 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2038 } 2039 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2040 mutex_exit(&dn->dn_mtx); 2041 2042 multilist_sublist_remove(list, dn); 2043 dnode_rele(dn, &os->os_synced_dnodes); 2044 } 2045 do_userquota_cacheflush(os, &cache, tx); 2046 multilist_sublist_unlock(list); 2047 kmem_free(uua, sizeof (*uua)); 2048 } 2049 2050 /* 2051 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2052 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2053 * evicted because the block containing the dnode can't be evicted until it is 2054 * written out. However, this hold is necessary to prevent the dnode_t from 2055 * being moved (via dnode_move()) while it's still referenced by 2056 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2057 * dirty_lightweight_leaf-type dirty records. 2058 * 2059 * If we are doing user-object accounting, the dnode_rele() happens from 2060 * userquota_updates_task() instead. 2061 */ 2062 static void 2063 dnode_rele_task(void *arg) 2064 { 2065 userquota_updates_arg_t *uua = arg; 2066 objset_t *os = uua->uua_os; 2067 2068 multilist_sublist_t *list = 2069 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2070 2071 dnode_t *dn; 2072 while ((dn = multilist_sublist_head(list)) != NULL) { 2073 multilist_sublist_remove(list, dn); 2074 dnode_rele(dn, &os->os_synced_dnodes); 2075 } 2076 multilist_sublist_unlock(list); 2077 kmem_free(uua, sizeof (*uua)); 2078 } 2079 2080 /* 2081 * Return TRUE if userquota updates are needed. 2082 */ 2083 static boolean_t 2084 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2085 { 2086 if (!dmu_objset_userused_enabled(os)) 2087 return (B_FALSE); 2088 2089 /* 2090 * If this is a raw receive just return and handle accounting 2091 * later when we have the keys loaded. We also don't do user 2092 * accounting during claiming since the datasets are not owned 2093 * for the duration of claiming and this txg should only be 2094 * used for recovery. 2095 */ 2096 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2097 return (B_FALSE); 2098 2099 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2100 return (B_FALSE); 2101 2102 /* Allocate the user/group/project used objects if necessary. */ 2103 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2104 VERIFY0(zap_create_claim(os, 2105 DMU_USERUSED_OBJECT, 2106 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2107 VERIFY0(zap_create_claim(os, 2108 DMU_GROUPUSED_OBJECT, 2109 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2110 } 2111 2112 if (dmu_objset_projectquota_enabled(os) && 2113 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2114 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2115 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2116 } 2117 return (B_TRUE); 2118 } 2119 2120 /* 2121 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2122 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2123 * The caller must taskq_wait(dp_sync_taskq). 2124 */ 2125 void 2126 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2127 { 2128 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2129 2130 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2131 for (int i = 0; i < num_sublists; i++) { 2132 userquota_updates_arg_t *uua = 2133 kmem_alloc(sizeof (*uua), KM_SLEEP); 2134 uua->uua_os = os; 2135 uua->uua_sublist_idx = i; 2136 uua->uua_tx = tx; 2137 2138 /* 2139 * If we don't need to update userquotas, use 2140 * dnode_rele_task() to call dnode_rele() 2141 */ 2142 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2143 need_userquota ? userquota_updates_task : dnode_rele_task, 2144 uua, 0); 2145 /* callback frees uua */ 2146 } 2147 } 2148 2149 2150 /* 2151 * Returns a pointer to data to find uid/gid from 2152 * 2153 * If a dirty record for transaction group that is syncing can't 2154 * be found then NULL is returned. In the NULL case it is assumed 2155 * the uid/gid aren't changing. 2156 */ 2157 static void * 2158 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2159 { 2160 dbuf_dirty_record_t *dr; 2161 void *data; 2162 2163 if (db->db_dirtycnt == 0) 2164 return (db->db.db_data); /* Nothing is changing */ 2165 2166 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2167 2168 if (dr == NULL) { 2169 data = NULL; 2170 } else { 2171 if (dr->dr_dnode->dn_bonuslen == 0 && 2172 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2173 data = dr->dt.dl.dr_data->b_data; 2174 else 2175 data = dr->dt.dl.dr_data; 2176 } 2177 2178 return (data); 2179 } 2180 2181 void 2182 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2183 { 2184 objset_t *os = dn->dn_objset; 2185 void *data = NULL; 2186 dmu_buf_impl_t *db = NULL; 2187 int flags = dn->dn_id_flags; 2188 int error; 2189 boolean_t have_spill = B_FALSE; 2190 2191 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2192 return; 2193 2194 /* 2195 * Raw receives introduce a problem with user accounting. Raw 2196 * receives cannot update the user accounting info because the 2197 * user ids and the sizes are encrypted. To guarantee that we 2198 * never end up with bad user accounting, we simply disable it 2199 * during raw receives. We also disable this for normal receives 2200 * so that an incremental raw receive may be done on top of an 2201 * existing non-raw receive. 2202 */ 2203 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2204 return; 2205 2206 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2207 DN_ID_CHKED_SPILL))) 2208 return; 2209 2210 if (before && dn->dn_bonuslen != 0) 2211 data = DN_BONUS(dn->dn_phys); 2212 else if (!before && dn->dn_bonuslen != 0) { 2213 if (dn->dn_bonus) { 2214 db = dn->dn_bonus; 2215 mutex_enter(&db->db_mtx); 2216 data = dmu_objset_userquota_find_data(db, tx); 2217 } else { 2218 data = DN_BONUS(dn->dn_phys); 2219 } 2220 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2221 int rf = 0; 2222 2223 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2224 rf |= DB_RF_HAVESTRUCT; 2225 error = dmu_spill_hold_by_dnode(dn, 2226 rf | DB_RF_MUST_SUCCEED, 2227 FTAG, (dmu_buf_t **)&db); 2228 ASSERT(error == 0); 2229 mutex_enter(&db->db_mtx); 2230 data = (before) ? db->db.db_data : 2231 dmu_objset_userquota_find_data(db, tx); 2232 have_spill = B_TRUE; 2233 } else { 2234 mutex_enter(&dn->dn_mtx); 2235 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2236 mutex_exit(&dn->dn_mtx); 2237 return; 2238 } 2239 2240 /* 2241 * Must always call the callback in case the object 2242 * type has changed and that type isn't an object type to track 2243 */ 2244 zfs_file_info_t zfi; 2245 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2246 2247 if (before) { 2248 ASSERT(data); 2249 dn->dn_olduid = zfi.zfi_user; 2250 dn->dn_oldgid = zfi.zfi_group; 2251 dn->dn_oldprojid = zfi.zfi_project; 2252 } else if (data) { 2253 dn->dn_newuid = zfi.zfi_user; 2254 dn->dn_newgid = zfi.zfi_group; 2255 dn->dn_newprojid = zfi.zfi_project; 2256 } 2257 2258 /* 2259 * Preserve existing uid/gid when the callback can't determine 2260 * what the new uid/gid are and the callback returned EEXIST. 2261 * The EEXIST error tells us to just use the existing uid/gid. 2262 * If we don't know what the old values are then just assign 2263 * them to 0, since that is a new file being created. 2264 */ 2265 if (!before && data == NULL && error == EEXIST) { 2266 if (flags & DN_ID_OLD_EXIST) { 2267 dn->dn_newuid = dn->dn_olduid; 2268 dn->dn_newgid = dn->dn_oldgid; 2269 dn->dn_newprojid = dn->dn_oldprojid; 2270 } else { 2271 dn->dn_newuid = 0; 2272 dn->dn_newgid = 0; 2273 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2274 } 2275 error = 0; 2276 } 2277 2278 if (db) 2279 mutex_exit(&db->db_mtx); 2280 2281 mutex_enter(&dn->dn_mtx); 2282 if (error == 0 && before) 2283 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2284 if (error == 0 && !before) 2285 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2286 2287 if (have_spill) { 2288 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2289 } else { 2290 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2291 } 2292 mutex_exit(&dn->dn_mtx); 2293 if (have_spill) 2294 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2295 } 2296 2297 boolean_t 2298 dmu_objset_userspace_present(objset_t *os) 2299 { 2300 return (os->os_phys->os_flags & 2301 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2302 } 2303 2304 boolean_t 2305 dmu_objset_userobjspace_present(objset_t *os) 2306 { 2307 return (os->os_phys->os_flags & 2308 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2309 } 2310 2311 boolean_t 2312 dmu_objset_projectquota_present(objset_t *os) 2313 { 2314 return (os->os_phys->os_flags & 2315 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2316 } 2317 2318 static int 2319 dmu_objset_space_upgrade(objset_t *os) 2320 { 2321 uint64_t obj; 2322 int err = 0; 2323 2324 /* 2325 * We simply need to mark every object dirty, so that it will be 2326 * synced out and now accounted. If this is called 2327 * concurrently, or if we already did some work before crashing, 2328 * that's fine, since we track each object's accounted state 2329 * independently. 2330 */ 2331 2332 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2333 dmu_tx_t *tx; 2334 dmu_buf_t *db; 2335 int objerr; 2336 2337 mutex_enter(&os->os_upgrade_lock); 2338 if (os->os_upgrade_exit) 2339 err = SET_ERROR(EINTR); 2340 mutex_exit(&os->os_upgrade_lock); 2341 if (err != 0) 2342 return (err); 2343 2344 if (issig(JUSTLOOKING) && issig(FORREAL)) 2345 return (SET_ERROR(EINTR)); 2346 2347 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2348 if (objerr != 0) 2349 continue; 2350 tx = dmu_tx_create(os); 2351 dmu_tx_hold_bonus(tx, obj); 2352 objerr = dmu_tx_assign(tx, TXG_WAIT); 2353 if (objerr != 0) { 2354 dmu_buf_rele(db, FTAG); 2355 dmu_tx_abort(tx); 2356 continue; 2357 } 2358 dmu_buf_will_dirty(db, tx); 2359 dmu_buf_rele(db, FTAG); 2360 dmu_tx_commit(tx); 2361 } 2362 return (0); 2363 } 2364 2365 static int 2366 dmu_objset_userspace_upgrade_cb(objset_t *os) 2367 { 2368 int err = 0; 2369 2370 if (dmu_objset_userspace_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 2377 err = dmu_objset_space_upgrade(os); 2378 if (err) 2379 return (err); 2380 2381 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2382 txg_wait_synced(dmu_objset_pool(os), 0); 2383 return (0); 2384 } 2385 2386 void 2387 dmu_objset_userspace_upgrade(objset_t *os) 2388 { 2389 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2390 } 2391 2392 static int 2393 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2394 { 2395 int err = 0; 2396 2397 if (dmu_objset_userobjspace_present(os) && 2398 dmu_objset_projectquota_present(os)) 2399 return (0); 2400 if (dmu_objset_is_snapshot(os)) 2401 return (SET_ERROR(EINVAL)); 2402 if (!dmu_objset_userused_enabled(os)) 2403 return (SET_ERROR(ENOTSUP)); 2404 if (!dmu_objset_projectquota_enabled(os) && 2405 dmu_objset_userobjspace_present(os)) 2406 return (SET_ERROR(ENOTSUP)); 2407 2408 if (dmu_objset_userobjused_enabled(os)) 2409 dmu_objset_ds(os)->ds_feature_activation[ 2410 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2411 if (dmu_objset_projectquota_enabled(os)) 2412 dmu_objset_ds(os)->ds_feature_activation[ 2413 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2414 2415 err = dmu_objset_space_upgrade(os); 2416 if (err) 2417 return (err); 2418 2419 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2420 if (dmu_objset_userobjused_enabled(os)) 2421 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2422 if (dmu_objset_projectquota_enabled(os)) 2423 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2424 2425 txg_wait_synced(dmu_objset_pool(os), 0); 2426 return (0); 2427 } 2428 2429 void 2430 dmu_objset_id_quota_upgrade(objset_t *os) 2431 { 2432 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2433 } 2434 2435 boolean_t 2436 dmu_objset_userobjspace_upgradable(objset_t *os) 2437 { 2438 return (dmu_objset_type(os) == DMU_OST_ZFS && 2439 !dmu_objset_is_snapshot(os) && 2440 dmu_objset_userobjused_enabled(os) && 2441 !dmu_objset_userobjspace_present(os) && 2442 spa_writeable(dmu_objset_spa(os))); 2443 } 2444 2445 boolean_t 2446 dmu_objset_projectquota_upgradable(objset_t *os) 2447 { 2448 return (dmu_objset_type(os) == DMU_OST_ZFS && 2449 !dmu_objset_is_snapshot(os) && 2450 dmu_objset_projectquota_enabled(os) && 2451 !dmu_objset_projectquota_present(os) && 2452 spa_writeable(dmu_objset_spa(os))); 2453 } 2454 2455 void 2456 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2457 uint64_t *usedobjsp, uint64_t *availobjsp) 2458 { 2459 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2460 usedobjsp, availobjsp); 2461 } 2462 2463 uint64_t 2464 dmu_objset_fsid_guid(objset_t *os) 2465 { 2466 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2467 } 2468 2469 void 2470 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2471 { 2472 stat->dds_type = os->os_phys->os_type; 2473 if (os->os_dsl_dataset) 2474 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2475 } 2476 2477 void 2478 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2479 { 2480 ASSERT(os->os_dsl_dataset || 2481 os->os_phys->os_type == DMU_OST_META); 2482 2483 if (os->os_dsl_dataset != NULL) 2484 dsl_dataset_stats(os->os_dsl_dataset, nv); 2485 2486 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2487 os->os_phys->os_type); 2488 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2489 dmu_objset_userspace_present(os)); 2490 } 2491 2492 int 2493 dmu_objset_is_snapshot(objset_t *os) 2494 { 2495 if (os->os_dsl_dataset != NULL) 2496 return (os->os_dsl_dataset->ds_is_snapshot); 2497 else 2498 return (B_FALSE); 2499 } 2500 2501 int 2502 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2503 boolean_t *conflict) 2504 { 2505 dsl_dataset_t *ds = os->os_dsl_dataset; 2506 uint64_t ignored; 2507 2508 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2509 return (SET_ERROR(ENOENT)); 2510 2511 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2512 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2513 MT_NORMALIZE, real, maxlen, conflict)); 2514 } 2515 2516 int 2517 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2518 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2519 { 2520 dsl_dataset_t *ds = os->os_dsl_dataset; 2521 zap_cursor_t cursor; 2522 zap_attribute_t attr; 2523 2524 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2525 2526 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2527 return (SET_ERROR(ENOENT)); 2528 2529 zap_cursor_init_serialized(&cursor, 2530 ds->ds_dir->dd_pool->dp_meta_objset, 2531 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2532 2533 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2534 zap_cursor_fini(&cursor); 2535 return (SET_ERROR(ENOENT)); 2536 } 2537 2538 if (strlen(attr.za_name) + 1 > namelen) { 2539 zap_cursor_fini(&cursor); 2540 return (SET_ERROR(ENAMETOOLONG)); 2541 } 2542 2543 (void) strlcpy(name, attr.za_name, namelen); 2544 if (idp) 2545 *idp = attr.za_first_integer; 2546 if (case_conflict) 2547 *case_conflict = attr.za_normalization_conflict; 2548 zap_cursor_advance(&cursor); 2549 *offp = zap_cursor_serialize(&cursor); 2550 zap_cursor_fini(&cursor); 2551 2552 return (0); 2553 } 2554 2555 int 2556 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2557 { 2558 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2559 } 2560 2561 int 2562 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2563 uint64_t *idp, uint64_t *offp) 2564 { 2565 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2566 zap_cursor_t cursor; 2567 zap_attribute_t attr; 2568 2569 /* there is no next dir on a snapshot! */ 2570 if (os->os_dsl_dataset->ds_object != 2571 dsl_dir_phys(dd)->dd_head_dataset_obj) 2572 return (SET_ERROR(ENOENT)); 2573 2574 zap_cursor_init_serialized(&cursor, 2575 dd->dd_pool->dp_meta_objset, 2576 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2577 2578 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2579 zap_cursor_fini(&cursor); 2580 return (SET_ERROR(ENOENT)); 2581 } 2582 2583 if (strlen(attr.za_name) + 1 > namelen) { 2584 zap_cursor_fini(&cursor); 2585 return (SET_ERROR(ENAMETOOLONG)); 2586 } 2587 2588 (void) strlcpy(name, attr.za_name, namelen); 2589 if (idp) 2590 *idp = attr.za_first_integer; 2591 zap_cursor_advance(&cursor); 2592 *offp = zap_cursor_serialize(&cursor); 2593 zap_cursor_fini(&cursor); 2594 2595 return (0); 2596 } 2597 2598 typedef struct dmu_objset_find_ctx { 2599 taskq_t *dc_tq; 2600 dsl_pool_t *dc_dp; 2601 uint64_t dc_ddobj; 2602 char *dc_ddname; /* last component of ddobj's name */ 2603 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2604 void *dc_arg; 2605 int dc_flags; 2606 kmutex_t *dc_error_lock; 2607 int *dc_error; 2608 } dmu_objset_find_ctx_t; 2609 2610 static void 2611 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2612 { 2613 dsl_pool_t *dp = dcp->dc_dp; 2614 dsl_dir_t *dd; 2615 dsl_dataset_t *ds; 2616 zap_cursor_t zc; 2617 zap_attribute_t *attr; 2618 uint64_t thisobj; 2619 int err = 0; 2620 2621 /* don't process if there already was an error */ 2622 if (*dcp->dc_error != 0) 2623 goto out; 2624 2625 /* 2626 * Note: passing the name (dc_ddname) here is optional, but it 2627 * improves performance because we don't need to call 2628 * zap_value_search() to determine the name. 2629 */ 2630 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2631 if (err != 0) 2632 goto out; 2633 2634 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2635 if (dd->dd_myname[0] == '$') { 2636 dsl_dir_rele(dd, FTAG); 2637 goto out; 2638 } 2639 2640 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2641 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2642 2643 /* 2644 * Iterate over all children. 2645 */ 2646 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2647 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2648 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2649 zap_cursor_retrieve(&zc, attr) == 0; 2650 (void) zap_cursor_advance(&zc)) { 2651 ASSERT3U(attr->za_integer_length, ==, 2652 sizeof (uint64_t)); 2653 ASSERT3U(attr->za_num_integers, ==, 1); 2654 2655 dmu_objset_find_ctx_t *child_dcp = 2656 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2657 *child_dcp = *dcp; 2658 child_dcp->dc_ddobj = attr->za_first_integer; 2659 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2660 if (dcp->dc_tq != NULL) 2661 (void) taskq_dispatch(dcp->dc_tq, 2662 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2663 else 2664 dmu_objset_find_dp_impl(child_dcp); 2665 } 2666 zap_cursor_fini(&zc); 2667 } 2668 2669 /* 2670 * Iterate over all snapshots. 2671 */ 2672 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2673 dsl_dataset_t *ds; 2674 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2675 2676 if (err == 0) { 2677 uint64_t snapobj; 2678 2679 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2680 dsl_dataset_rele(ds, FTAG); 2681 2682 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2683 zap_cursor_retrieve(&zc, attr) == 0; 2684 (void) zap_cursor_advance(&zc)) { 2685 ASSERT3U(attr->za_integer_length, ==, 2686 sizeof (uint64_t)); 2687 ASSERT3U(attr->za_num_integers, ==, 1); 2688 2689 err = dsl_dataset_hold_obj(dp, 2690 attr->za_first_integer, FTAG, &ds); 2691 if (err != 0) 2692 break; 2693 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2694 dsl_dataset_rele(ds, FTAG); 2695 if (err != 0) 2696 break; 2697 } 2698 zap_cursor_fini(&zc); 2699 } 2700 } 2701 2702 kmem_free(attr, sizeof (zap_attribute_t)); 2703 2704 if (err != 0) { 2705 dsl_dir_rele(dd, FTAG); 2706 goto out; 2707 } 2708 2709 /* 2710 * Apply to self. 2711 */ 2712 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2713 2714 /* 2715 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2716 * that the dir will remain cached, and we won't have to re-instantiate 2717 * it (which could be expensive due to finding its name via 2718 * zap_value_search()). 2719 */ 2720 dsl_dir_rele(dd, FTAG); 2721 if (err != 0) 2722 goto out; 2723 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2724 dsl_dataset_rele(ds, FTAG); 2725 2726 out: 2727 if (err != 0) { 2728 mutex_enter(dcp->dc_error_lock); 2729 /* only keep first error */ 2730 if (*dcp->dc_error == 0) 2731 *dcp->dc_error = err; 2732 mutex_exit(dcp->dc_error_lock); 2733 } 2734 2735 if (dcp->dc_ddname != NULL) 2736 spa_strfree(dcp->dc_ddname); 2737 kmem_free(dcp, sizeof (*dcp)); 2738 } 2739 2740 static void 2741 dmu_objset_find_dp_cb(void *arg) 2742 { 2743 dmu_objset_find_ctx_t *dcp = arg; 2744 dsl_pool_t *dp = dcp->dc_dp; 2745 2746 /* 2747 * We need to get a pool_config_lock here, as there are several 2748 * assert(pool_config_held) down the stack. Getting a lock via 2749 * dsl_pool_config_enter is risky, as it might be stalled by a 2750 * pending writer. This would deadlock, as the write lock can 2751 * only be granted when our parent thread gives up the lock. 2752 * The _prio interface gives us priority over a pending writer. 2753 */ 2754 dsl_pool_config_enter_prio(dp, FTAG); 2755 2756 dmu_objset_find_dp_impl(dcp); 2757 2758 dsl_pool_config_exit(dp, FTAG); 2759 } 2760 2761 /* 2762 * Find objsets under and including ddobj, call func(ds) on each. 2763 * The order for the enumeration is completely undefined. 2764 * func is called with dsl_pool_config held. 2765 */ 2766 int 2767 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2768 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2769 { 2770 int error = 0; 2771 taskq_t *tq = NULL; 2772 int ntasks; 2773 dmu_objset_find_ctx_t *dcp; 2774 kmutex_t err_lock; 2775 2776 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2777 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2778 dcp->dc_tq = NULL; 2779 dcp->dc_dp = dp; 2780 dcp->dc_ddobj = ddobj; 2781 dcp->dc_ddname = NULL; 2782 dcp->dc_func = func; 2783 dcp->dc_arg = arg; 2784 dcp->dc_flags = flags; 2785 dcp->dc_error_lock = &err_lock; 2786 dcp->dc_error = &error; 2787 2788 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2789 /* 2790 * In case a write lock is held we can't make use of 2791 * parallelism, as down the stack of the worker threads 2792 * the lock is asserted via dsl_pool_config_held. 2793 * In case of a read lock this is solved by getting a read 2794 * lock in each worker thread, which isn't possible in case 2795 * of a writer lock. So we fall back to the synchronous path 2796 * here. 2797 * In the future it might be possible to get some magic into 2798 * dsl_pool_config_held in a way that it returns true for 2799 * the worker threads so that a single lock held from this 2800 * thread suffices. For now, stay single threaded. 2801 */ 2802 dmu_objset_find_dp_impl(dcp); 2803 mutex_destroy(&err_lock); 2804 2805 return (error); 2806 } 2807 2808 ntasks = dmu_find_threads; 2809 if (ntasks == 0) 2810 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2811 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2812 INT_MAX, 0); 2813 if (tq == NULL) { 2814 kmem_free(dcp, sizeof (*dcp)); 2815 mutex_destroy(&err_lock); 2816 2817 return (SET_ERROR(ENOMEM)); 2818 } 2819 dcp->dc_tq = tq; 2820 2821 /* dcp will be freed by task */ 2822 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2823 2824 /* 2825 * PORTING: this code relies on the property of taskq_wait to wait 2826 * until no more tasks are queued and no more tasks are active. As 2827 * we always queue new tasks from within other tasks, task_wait 2828 * reliably waits for the full recursion to finish, even though we 2829 * enqueue new tasks after taskq_wait has been called. 2830 * On platforms other than illumos, taskq_wait may not have this 2831 * property. 2832 */ 2833 taskq_wait(tq); 2834 taskq_destroy(tq); 2835 mutex_destroy(&err_lock); 2836 2837 return (error); 2838 } 2839 2840 /* 2841 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2842 * The dp_config_rwlock must not be held when this is called, and it 2843 * will not be held when the callback is called. 2844 * Therefore this function should only be used when the pool is not changing 2845 * (e.g. in syncing context), or the callback can deal with the possible races. 2846 */ 2847 static int 2848 dmu_objset_find_impl(spa_t *spa, const char *name, 2849 int func(const char *, void *), void *arg, int flags) 2850 { 2851 dsl_dir_t *dd; 2852 dsl_pool_t *dp = spa_get_dsl(spa); 2853 dsl_dataset_t *ds; 2854 zap_cursor_t zc; 2855 zap_attribute_t *attr; 2856 char *child; 2857 uint64_t thisobj; 2858 int err; 2859 2860 dsl_pool_config_enter(dp, FTAG); 2861 2862 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2863 if (err != 0) { 2864 dsl_pool_config_exit(dp, FTAG); 2865 return (err); 2866 } 2867 2868 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2869 if (dd->dd_myname[0] == '$') { 2870 dsl_dir_rele(dd, FTAG); 2871 dsl_pool_config_exit(dp, FTAG); 2872 return (0); 2873 } 2874 2875 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2876 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2877 2878 /* 2879 * Iterate over all children. 2880 */ 2881 if (flags & DS_FIND_CHILDREN) { 2882 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2883 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2884 zap_cursor_retrieve(&zc, attr) == 0; 2885 (void) zap_cursor_advance(&zc)) { 2886 ASSERT3U(attr->za_integer_length, ==, 2887 sizeof (uint64_t)); 2888 ASSERT3U(attr->za_num_integers, ==, 1); 2889 2890 child = kmem_asprintf("%s/%s", name, attr->za_name); 2891 dsl_pool_config_exit(dp, FTAG); 2892 err = dmu_objset_find_impl(spa, child, 2893 func, arg, flags); 2894 dsl_pool_config_enter(dp, FTAG); 2895 kmem_strfree(child); 2896 if (err != 0) 2897 break; 2898 } 2899 zap_cursor_fini(&zc); 2900 2901 if (err != 0) { 2902 dsl_dir_rele(dd, FTAG); 2903 dsl_pool_config_exit(dp, FTAG); 2904 kmem_free(attr, sizeof (zap_attribute_t)); 2905 return (err); 2906 } 2907 } 2908 2909 /* 2910 * Iterate over all snapshots. 2911 */ 2912 if (flags & DS_FIND_SNAPSHOTS) { 2913 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2914 2915 if (err == 0) { 2916 uint64_t snapobj; 2917 2918 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2919 dsl_dataset_rele(ds, FTAG); 2920 2921 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2922 zap_cursor_retrieve(&zc, attr) == 0; 2923 (void) zap_cursor_advance(&zc)) { 2924 ASSERT3U(attr->za_integer_length, ==, 2925 sizeof (uint64_t)); 2926 ASSERT3U(attr->za_num_integers, ==, 1); 2927 2928 child = kmem_asprintf("%s@%s", 2929 name, attr->za_name); 2930 dsl_pool_config_exit(dp, FTAG); 2931 err = func(child, arg); 2932 dsl_pool_config_enter(dp, FTAG); 2933 kmem_strfree(child); 2934 if (err != 0) 2935 break; 2936 } 2937 zap_cursor_fini(&zc); 2938 } 2939 } 2940 2941 dsl_dir_rele(dd, FTAG); 2942 kmem_free(attr, sizeof (zap_attribute_t)); 2943 dsl_pool_config_exit(dp, FTAG); 2944 2945 if (err != 0) 2946 return (err); 2947 2948 /* Apply to self. */ 2949 return (func(name, arg)); 2950 } 2951 2952 /* 2953 * See comment above dmu_objset_find_impl(). 2954 */ 2955 int 2956 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2957 int flags) 2958 { 2959 spa_t *spa; 2960 int error; 2961 2962 error = spa_open(name, &spa, FTAG); 2963 if (error != 0) 2964 return (error); 2965 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2966 spa_close(spa, FTAG); 2967 return (error); 2968 } 2969 2970 boolean_t 2971 dmu_objset_incompatible_encryption_version(objset_t *os) 2972 { 2973 return (dsl_dir_incompatible_encryption_version( 2974 os->os_dsl_dataset->ds_dir)); 2975 } 2976 2977 void 2978 dmu_objset_set_user(objset_t *os, void *user_ptr) 2979 { 2980 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2981 os->os_user_ptr = user_ptr; 2982 } 2983 2984 void * 2985 dmu_objset_get_user(objset_t *os) 2986 { 2987 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2988 return (os->os_user_ptr); 2989 } 2990 2991 /* 2992 * Determine name of filesystem, given name of snapshot. 2993 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 2994 */ 2995 int 2996 dmu_fsname(const char *snapname, char *buf) 2997 { 2998 char *atp = strchr(snapname, '@'); 2999 if (atp == NULL) 3000 return (SET_ERROR(EINVAL)); 3001 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 3002 return (SET_ERROR(ENAMETOOLONG)); 3003 (void) strlcpy(buf, snapname, atp - snapname + 1); 3004 return (0); 3005 } 3006 3007 /* 3008 * Call when we think we're going to write/free space in open context 3009 * to track the amount of dirty data in the open txg, which is also the 3010 * amount of memory that can not be evicted until this txg syncs. 3011 * 3012 * Note that there are two conditions where this can be called from 3013 * syncing context: 3014 * 3015 * [1] When we just created the dataset, in which case we go on with 3016 * updating any accounting of dirty data as usual. 3017 * [2] When we are dirtying MOS data, in which case we only update the 3018 * pool's accounting of dirty data. 3019 */ 3020 void 3021 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3022 { 3023 dsl_dataset_t *ds = os->os_dsl_dataset; 3024 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3025 3026 if (ds != NULL) { 3027 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3028 } 3029 3030 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3031 } 3032 3033 #if defined(_KERNEL) 3034 EXPORT_SYMBOL(dmu_objset_zil); 3035 EXPORT_SYMBOL(dmu_objset_pool); 3036 EXPORT_SYMBOL(dmu_objset_ds); 3037 EXPORT_SYMBOL(dmu_objset_type); 3038 EXPORT_SYMBOL(dmu_objset_name); 3039 EXPORT_SYMBOL(dmu_objset_hold); 3040 EXPORT_SYMBOL(dmu_objset_hold_flags); 3041 EXPORT_SYMBOL(dmu_objset_own); 3042 EXPORT_SYMBOL(dmu_objset_rele); 3043 EXPORT_SYMBOL(dmu_objset_rele_flags); 3044 EXPORT_SYMBOL(dmu_objset_disown); 3045 EXPORT_SYMBOL(dmu_objset_from_ds); 3046 EXPORT_SYMBOL(dmu_objset_create); 3047 EXPORT_SYMBOL(dmu_objset_clone); 3048 EXPORT_SYMBOL(dmu_objset_stats); 3049 EXPORT_SYMBOL(dmu_objset_fast_stat); 3050 EXPORT_SYMBOL(dmu_objset_spa); 3051 EXPORT_SYMBOL(dmu_objset_space); 3052 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3053 EXPORT_SYMBOL(dmu_objset_find); 3054 EXPORT_SYMBOL(dmu_objset_byteswap); 3055 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3056 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3057 EXPORT_SYMBOL(dmu_objset_dnodesize); 3058 3059 EXPORT_SYMBOL(dmu_objset_sync); 3060 EXPORT_SYMBOL(dmu_objset_is_dirty); 3061 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3062 EXPORT_SYMBOL(dmu_objset_create_impl); 3063 EXPORT_SYMBOL(dmu_objset_open_impl); 3064 EXPORT_SYMBOL(dmu_objset_evict); 3065 EXPORT_SYMBOL(dmu_objset_register_type); 3066 EXPORT_SYMBOL(dmu_objset_sync_done); 3067 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3068 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3069 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3070 EXPORT_SYMBOL(dmu_objset_userspace_present); 3071 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3072 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3073 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3074 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3075 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3076 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3077 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3078 #endif 3079