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 memset(buf->b_data, 0, size); 520 memcpy(buf->b_data, os->os_phys_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 memset(os->os_phys, 0, 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, const 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, const 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, const 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, const 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, const 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, const 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, const 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, const 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, const 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 * In the codepath dsl_dataset_sync()->dmu_objset_sync() we cannot 1700 * rely on the zio above completing and calling back 1701 * dmu_objset_write_done()->dsl_dataset_block_born() before 1702 * dsl_dataset_sync() actually activates feature flags near its end. 1703 * Decide here if any features need to be activated, before 1704 * dsl_dataset_sync() completes its run. 1705 */ 1706 dsl_dataset_feature_set_activation(blkptr_copy, os->os_dsl_dataset); 1707 1708 /* 1709 * Sync special dnodes - the parent IO for the sync is the root block 1710 */ 1711 DMU_META_DNODE(os)->dn_zio = zio; 1712 dnode_sync(DMU_META_DNODE(os), tx); 1713 1714 os->os_phys->os_flags = os->os_flags; 1715 1716 if (DMU_USERUSED_DNODE(os) && 1717 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1718 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1719 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1720 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1721 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1722 } 1723 1724 if (DMU_PROJECTUSED_DNODE(os) && 1725 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1726 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1727 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1728 } 1729 1730 txgoff = tx->tx_txg & TXG_MASK; 1731 1732 /* 1733 * We must create the list here because it uses the 1734 * dn_dirty_link[] of this txg. But it may already 1735 * exist because we call dsl_dataset_sync() twice per txg. 1736 */ 1737 if (os->os_synced_dnodes.ml_sublists == NULL) { 1738 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1739 offsetof(dnode_t, dn_dirty_link[txgoff]), 1740 dnode_multilist_index_func); 1741 } else { 1742 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1743 offsetof(dnode_t, dn_dirty_link[txgoff])); 1744 } 1745 1746 ml = &os->os_dirty_dnodes[txgoff]; 1747 num_sublists = multilist_get_num_sublists(ml); 1748 for (int i = 0; i < num_sublists; i++) { 1749 if (multilist_sublist_is_empty_idx(ml, i)) 1750 continue; 1751 sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP); 1752 sda->sda_list = ml; 1753 sda->sda_sublist_idx = i; 1754 sda->sda_tx = tx; 1755 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 1756 sync_dnodes_task, sda, 0); 1757 /* callback frees sda */ 1758 } 1759 taskq_wait(dmu_objset_pool(os)->dp_sync_taskq); 1760 1761 list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1762 while ((dr = list_head(list)) != NULL) { 1763 ASSERT0(dr->dr_dbuf->db_level); 1764 list_remove(list, dr); 1765 zio_nowait(dr->dr_zio); 1766 } 1767 1768 /* Enable dnode backfill if enough objects have been freed. */ 1769 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1770 os->os_rescan_dnodes = B_TRUE; 1771 os->os_freed_dnodes = 0; 1772 } 1773 1774 /* 1775 * Free intent log blocks up to this tx. 1776 */ 1777 zil_sync(os->os_zil, tx); 1778 os->os_phys->os_zil_header = os->os_zil_header; 1779 zio_nowait(zio); 1780 } 1781 1782 boolean_t 1783 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1784 { 1785 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1786 } 1787 1788 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1789 1790 void 1791 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1792 { 1793 file_cbs[ost] = cb; 1794 } 1795 1796 int 1797 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1798 zfs_file_info_t *zfi) 1799 { 1800 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1801 if (cb == NULL) 1802 return (EINVAL); 1803 return (cb(bonustype, data, zfi)); 1804 } 1805 1806 boolean_t 1807 dmu_objset_userused_enabled(objset_t *os) 1808 { 1809 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1810 file_cbs[os->os_phys->os_type] != NULL && 1811 DMU_USERUSED_DNODE(os) != NULL); 1812 } 1813 1814 boolean_t 1815 dmu_objset_userobjused_enabled(objset_t *os) 1816 { 1817 return (dmu_objset_userused_enabled(os) && 1818 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1819 } 1820 1821 boolean_t 1822 dmu_objset_projectquota_enabled(objset_t *os) 1823 { 1824 return (file_cbs[os->os_phys->os_type] != NULL && 1825 DMU_PROJECTUSED_DNODE(os) != NULL && 1826 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1827 } 1828 1829 typedef struct userquota_node { 1830 /* must be in the first filed, see userquota_update_cache() */ 1831 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1832 int64_t uqn_delta; 1833 avl_node_t uqn_node; 1834 } userquota_node_t; 1835 1836 typedef struct userquota_cache { 1837 avl_tree_t uqc_user_deltas; 1838 avl_tree_t uqc_group_deltas; 1839 avl_tree_t uqc_project_deltas; 1840 } userquota_cache_t; 1841 1842 static int 1843 userquota_compare(const void *l, const void *r) 1844 { 1845 const userquota_node_t *luqn = l; 1846 const userquota_node_t *ruqn = r; 1847 int rv; 1848 1849 /* 1850 * NB: can only access uqn_id because userquota_update_cache() doesn't 1851 * pass in an entire userquota_node_t. 1852 */ 1853 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1854 1855 return (TREE_ISIGN(rv)); 1856 } 1857 1858 static void 1859 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1860 { 1861 void *cookie; 1862 userquota_node_t *uqn; 1863 1864 ASSERT(dmu_tx_is_syncing(tx)); 1865 1866 cookie = NULL; 1867 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1868 &cookie)) != NULL) { 1869 /* 1870 * os_userused_lock protects against concurrent calls to 1871 * zap_increment_int(). It's needed because zap_increment_int() 1872 * is not thread-safe (i.e. not atomic). 1873 */ 1874 mutex_enter(&os->os_userused_lock); 1875 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1876 uqn->uqn_id, uqn->uqn_delta, tx)); 1877 mutex_exit(&os->os_userused_lock); 1878 kmem_free(uqn, sizeof (*uqn)); 1879 } 1880 avl_destroy(&cache->uqc_user_deltas); 1881 1882 cookie = NULL; 1883 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1884 &cookie)) != NULL) { 1885 mutex_enter(&os->os_userused_lock); 1886 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1887 uqn->uqn_id, uqn->uqn_delta, tx)); 1888 mutex_exit(&os->os_userused_lock); 1889 kmem_free(uqn, sizeof (*uqn)); 1890 } 1891 avl_destroy(&cache->uqc_group_deltas); 1892 1893 if (dmu_objset_projectquota_enabled(os)) { 1894 cookie = NULL; 1895 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1896 &cookie)) != NULL) { 1897 mutex_enter(&os->os_userused_lock); 1898 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1899 uqn->uqn_id, uqn->uqn_delta, tx)); 1900 mutex_exit(&os->os_userused_lock); 1901 kmem_free(uqn, sizeof (*uqn)); 1902 } 1903 avl_destroy(&cache->uqc_project_deltas); 1904 } 1905 } 1906 1907 static void 1908 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1909 { 1910 userquota_node_t *uqn; 1911 avl_index_t idx; 1912 1913 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1914 /* 1915 * Use id directly for searching because uqn_id is the first field of 1916 * userquota_node_t and fields after uqn_id won't be accessed in 1917 * avl_find(). 1918 */ 1919 uqn = avl_find(avl, (const void *)id, &idx); 1920 if (uqn == NULL) { 1921 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 1922 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 1923 avl_insert(avl, uqn, idx); 1924 } 1925 uqn->uqn_delta += delta; 1926 } 1927 1928 static void 1929 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 1930 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 1931 boolean_t subtract) 1932 { 1933 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 1934 int64_t delta = DNODE_MIN_SIZE + used; 1935 char name[20]; 1936 1937 if (subtract) 1938 delta = -delta; 1939 1940 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 1941 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1942 1943 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 1944 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1945 1946 if (dmu_objset_projectquota_enabled(os)) { 1947 (void) snprintf(name, sizeof (name), "%llx", 1948 (longlong_t)project); 1949 userquota_update_cache(&cache->uqc_project_deltas, 1950 name, delta); 1951 } 1952 } 1953 } 1954 1955 static void 1956 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 1957 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 1958 { 1959 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 1960 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 1961 int delta = subtract ? -1 : 1; 1962 1963 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1964 (longlong_t)user); 1965 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 1966 1967 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 1968 (longlong_t)group); 1969 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 1970 1971 if (dmu_objset_projectquota_enabled(os)) { 1972 (void) snprintf(name, sizeof (name), 1973 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 1974 userquota_update_cache(&cache->uqc_project_deltas, 1975 name, delta); 1976 } 1977 } 1978 } 1979 1980 typedef struct userquota_updates_arg { 1981 objset_t *uua_os; 1982 int uua_sublist_idx; 1983 dmu_tx_t *uua_tx; 1984 } userquota_updates_arg_t; 1985 1986 static void 1987 userquota_updates_task(void *arg) 1988 { 1989 userquota_updates_arg_t *uua = arg; 1990 objset_t *os = uua->uua_os; 1991 dmu_tx_t *tx = uua->uua_tx; 1992 dnode_t *dn; 1993 userquota_cache_t cache = { { 0 } }; 1994 1995 multilist_sublist_t *list = 1996 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 1997 1998 ASSERT(multilist_sublist_head(list) == NULL || 1999 dmu_objset_userused_enabled(os)); 2000 avl_create(&cache.uqc_user_deltas, userquota_compare, 2001 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2002 avl_create(&cache.uqc_group_deltas, userquota_compare, 2003 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2004 if (dmu_objset_projectquota_enabled(os)) 2005 avl_create(&cache.uqc_project_deltas, userquota_compare, 2006 sizeof (userquota_node_t), offsetof(userquota_node_t, 2007 uqn_node)); 2008 2009 while ((dn = multilist_sublist_head(list)) != NULL) { 2010 int flags; 2011 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2012 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2013 dn->dn_phys->dn_flags & 2014 DNODE_FLAG_USERUSED_ACCOUNTED); 2015 2016 flags = dn->dn_id_flags; 2017 ASSERT(flags); 2018 if (flags & DN_ID_OLD_EXIST) { 2019 do_userquota_update(os, &cache, dn->dn_oldused, 2020 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2021 dn->dn_oldprojid, B_TRUE); 2022 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2023 dn->dn_olduid, dn->dn_oldgid, 2024 dn->dn_oldprojid, B_TRUE); 2025 } 2026 if (flags & DN_ID_NEW_EXIST) { 2027 do_userquota_update(os, &cache, 2028 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2029 dn->dn_newuid, dn->dn_newgid, 2030 dn->dn_newprojid, B_FALSE); 2031 do_userobjquota_update(os, &cache, 2032 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2033 dn->dn_newprojid, B_FALSE); 2034 } 2035 2036 mutex_enter(&dn->dn_mtx); 2037 dn->dn_oldused = 0; 2038 dn->dn_oldflags = 0; 2039 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2040 dn->dn_olduid = dn->dn_newuid; 2041 dn->dn_oldgid = dn->dn_newgid; 2042 dn->dn_oldprojid = dn->dn_newprojid; 2043 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2044 if (dn->dn_bonuslen == 0) 2045 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2046 else 2047 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2048 } 2049 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2050 mutex_exit(&dn->dn_mtx); 2051 2052 multilist_sublist_remove(list, dn); 2053 dnode_rele(dn, &os->os_synced_dnodes); 2054 } 2055 do_userquota_cacheflush(os, &cache, tx); 2056 multilist_sublist_unlock(list); 2057 kmem_free(uua, sizeof (*uua)); 2058 } 2059 2060 /* 2061 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2062 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2063 * evicted because the block containing the dnode can't be evicted until it is 2064 * written out. However, this hold is necessary to prevent the dnode_t from 2065 * being moved (via dnode_move()) while it's still referenced by 2066 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2067 * dirty_lightweight_leaf-type dirty records. 2068 * 2069 * If we are doing user-object accounting, the dnode_rele() happens from 2070 * userquota_updates_task() instead. 2071 */ 2072 static void 2073 dnode_rele_task(void *arg) 2074 { 2075 userquota_updates_arg_t *uua = arg; 2076 objset_t *os = uua->uua_os; 2077 2078 multilist_sublist_t *list = 2079 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2080 2081 dnode_t *dn; 2082 while ((dn = multilist_sublist_head(list)) != NULL) { 2083 multilist_sublist_remove(list, dn); 2084 dnode_rele(dn, &os->os_synced_dnodes); 2085 } 2086 multilist_sublist_unlock(list); 2087 kmem_free(uua, sizeof (*uua)); 2088 } 2089 2090 /* 2091 * Return TRUE if userquota updates are needed. 2092 */ 2093 static boolean_t 2094 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2095 { 2096 if (!dmu_objset_userused_enabled(os)) 2097 return (B_FALSE); 2098 2099 /* 2100 * If this is a raw receive just return and handle accounting 2101 * later when we have the keys loaded. We also don't do user 2102 * accounting during claiming since the datasets are not owned 2103 * for the duration of claiming and this txg should only be 2104 * used for recovery. 2105 */ 2106 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2107 return (B_FALSE); 2108 2109 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2110 return (B_FALSE); 2111 2112 /* Allocate the user/group/project used objects if necessary. */ 2113 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2114 VERIFY0(zap_create_claim(os, 2115 DMU_USERUSED_OBJECT, 2116 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2117 VERIFY0(zap_create_claim(os, 2118 DMU_GROUPUSED_OBJECT, 2119 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2120 } 2121 2122 if (dmu_objset_projectquota_enabled(os) && 2123 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2124 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2125 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2126 } 2127 return (B_TRUE); 2128 } 2129 2130 /* 2131 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2132 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2133 * The caller must taskq_wait(dp_sync_taskq). 2134 */ 2135 void 2136 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2137 { 2138 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2139 2140 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2141 for (int i = 0; i < num_sublists; i++) { 2142 userquota_updates_arg_t *uua = 2143 kmem_alloc(sizeof (*uua), KM_SLEEP); 2144 uua->uua_os = os; 2145 uua->uua_sublist_idx = i; 2146 uua->uua_tx = tx; 2147 2148 /* 2149 * If we don't need to update userquotas, use 2150 * dnode_rele_task() to call dnode_rele() 2151 */ 2152 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2153 need_userquota ? userquota_updates_task : dnode_rele_task, 2154 uua, 0); 2155 /* callback frees uua */ 2156 } 2157 } 2158 2159 2160 /* 2161 * Returns a pointer to data to find uid/gid from 2162 * 2163 * If a dirty record for transaction group that is syncing can't 2164 * be found then NULL is returned. In the NULL case it is assumed 2165 * the uid/gid aren't changing. 2166 */ 2167 static void * 2168 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2169 { 2170 dbuf_dirty_record_t *dr; 2171 void *data; 2172 2173 if (db->db_dirtycnt == 0) 2174 return (db->db.db_data); /* Nothing is changing */ 2175 2176 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2177 2178 if (dr == NULL) { 2179 data = NULL; 2180 } else { 2181 if (dr->dr_dnode->dn_bonuslen == 0 && 2182 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2183 data = dr->dt.dl.dr_data->b_data; 2184 else 2185 data = dr->dt.dl.dr_data; 2186 } 2187 2188 return (data); 2189 } 2190 2191 void 2192 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2193 { 2194 objset_t *os = dn->dn_objset; 2195 void *data = NULL; 2196 dmu_buf_impl_t *db = NULL; 2197 int flags = dn->dn_id_flags; 2198 int error; 2199 boolean_t have_spill = B_FALSE; 2200 2201 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2202 return; 2203 2204 /* 2205 * Raw receives introduce a problem with user accounting. Raw 2206 * receives cannot update the user accounting info because the 2207 * user ids and the sizes are encrypted. To guarantee that we 2208 * never end up with bad user accounting, we simply disable it 2209 * during raw receives. We also disable this for normal receives 2210 * so that an incremental raw receive may be done on top of an 2211 * existing non-raw receive. 2212 */ 2213 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2214 return; 2215 2216 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2217 DN_ID_CHKED_SPILL))) 2218 return; 2219 2220 if (before && dn->dn_bonuslen != 0) 2221 data = DN_BONUS(dn->dn_phys); 2222 else if (!before && dn->dn_bonuslen != 0) { 2223 if (dn->dn_bonus) { 2224 db = dn->dn_bonus; 2225 mutex_enter(&db->db_mtx); 2226 data = dmu_objset_userquota_find_data(db, tx); 2227 } else { 2228 data = DN_BONUS(dn->dn_phys); 2229 } 2230 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2231 int rf = 0; 2232 2233 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2234 rf |= DB_RF_HAVESTRUCT; 2235 error = dmu_spill_hold_by_dnode(dn, 2236 rf | DB_RF_MUST_SUCCEED, 2237 FTAG, (dmu_buf_t **)&db); 2238 ASSERT(error == 0); 2239 mutex_enter(&db->db_mtx); 2240 data = (before) ? db->db.db_data : 2241 dmu_objset_userquota_find_data(db, tx); 2242 have_spill = B_TRUE; 2243 } else { 2244 mutex_enter(&dn->dn_mtx); 2245 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2246 mutex_exit(&dn->dn_mtx); 2247 return; 2248 } 2249 2250 /* 2251 * Must always call the callback in case the object 2252 * type has changed and that type isn't an object type to track 2253 */ 2254 zfs_file_info_t zfi; 2255 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2256 2257 if (before) { 2258 ASSERT(data); 2259 dn->dn_olduid = zfi.zfi_user; 2260 dn->dn_oldgid = zfi.zfi_group; 2261 dn->dn_oldprojid = zfi.zfi_project; 2262 } else if (data) { 2263 dn->dn_newuid = zfi.zfi_user; 2264 dn->dn_newgid = zfi.zfi_group; 2265 dn->dn_newprojid = zfi.zfi_project; 2266 } 2267 2268 /* 2269 * Preserve existing uid/gid when the callback can't determine 2270 * what the new uid/gid are and the callback returned EEXIST. 2271 * The EEXIST error tells us to just use the existing uid/gid. 2272 * If we don't know what the old values are then just assign 2273 * them to 0, since that is a new file being created. 2274 */ 2275 if (!before && data == NULL && error == EEXIST) { 2276 if (flags & DN_ID_OLD_EXIST) { 2277 dn->dn_newuid = dn->dn_olduid; 2278 dn->dn_newgid = dn->dn_oldgid; 2279 dn->dn_newprojid = dn->dn_oldprojid; 2280 } else { 2281 dn->dn_newuid = 0; 2282 dn->dn_newgid = 0; 2283 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2284 } 2285 error = 0; 2286 } 2287 2288 if (db) 2289 mutex_exit(&db->db_mtx); 2290 2291 mutex_enter(&dn->dn_mtx); 2292 if (error == 0 && before) 2293 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2294 if (error == 0 && !before) 2295 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2296 2297 if (have_spill) { 2298 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2299 } else { 2300 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2301 } 2302 mutex_exit(&dn->dn_mtx); 2303 if (have_spill) 2304 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2305 } 2306 2307 boolean_t 2308 dmu_objset_userspace_present(objset_t *os) 2309 { 2310 return (os->os_phys->os_flags & 2311 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2312 } 2313 2314 boolean_t 2315 dmu_objset_userobjspace_present(objset_t *os) 2316 { 2317 return (os->os_phys->os_flags & 2318 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2319 } 2320 2321 boolean_t 2322 dmu_objset_projectquota_present(objset_t *os) 2323 { 2324 return (os->os_phys->os_flags & 2325 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2326 } 2327 2328 static int 2329 dmu_objset_space_upgrade(objset_t *os) 2330 { 2331 uint64_t obj; 2332 int err = 0; 2333 2334 /* 2335 * We simply need to mark every object dirty, so that it will be 2336 * synced out and now accounted. If this is called 2337 * concurrently, or if we already did some work before crashing, 2338 * that's fine, since we track each object's accounted state 2339 * independently. 2340 */ 2341 2342 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2343 dmu_tx_t *tx; 2344 dmu_buf_t *db; 2345 int objerr; 2346 2347 mutex_enter(&os->os_upgrade_lock); 2348 if (os->os_upgrade_exit) 2349 err = SET_ERROR(EINTR); 2350 mutex_exit(&os->os_upgrade_lock); 2351 if (err != 0) 2352 return (err); 2353 2354 if (issig(JUSTLOOKING) && issig(FORREAL)) 2355 return (SET_ERROR(EINTR)); 2356 2357 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2358 if (objerr != 0) 2359 continue; 2360 tx = dmu_tx_create(os); 2361 dmu_tx_hold_bonus(tx, obj); 2362 objerr = dmu_tx_assign(tx, TXG_WAIT); 2363 if (objerr != 0) { 2364 dmu_buf_rele(db, FTAG); 2365 dmu_tx_abort(tx); 2366 continue; 2367 } 2368 dmu_buf_will_dirty(db, tx); 2369 dmu_buf_rele(db, FTAG); 2370 dmu_tx_commit(tx); 2371 } 2372 return (0); 2373 } 2374 2375 static int 2376 dmu_objset_userspace_upgrade_cb(objset_t *os) 2377 { 2378 int err = 0; 2379 2380 if (dmu_objset_userspace_present(os)) 2381 return (0); 2382 if (dmu_objset_is_snapshot(os)) 2383 return (SET_ERROR(EINVAL)); 2384 if (!dmu_objset_userused_enabled(os)) 2385 return (SET_ERROR(ENOTSUP)); 2386 2387 err = dmu_objset_space_upgrade(os); 2388 if (err) 2389 return (err); 2390 2391 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2392 txg_wait_synced(dmu_objset_pool(os), 0); 2393 return (0); 2394 } 2395 2396 void 2397 dmu_objset_userspace_upgrade(objset_t *os) 2398 { 2399 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2400 } 2401 2402 static int 2403 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2404 { 2405 int err = 0; 2406 2407 if (dmu_objset_userobjspace_present(os) && 2408 dmu_objset_projectquota_present(os)) 2409 return (0); 2410 if (dmu_objset_is_snapshot(os)) 2411 return (SET_ERROR(EINVAL)); 2412 if (!dmu_objset_userused_enabled(os)) 2413 return (SET_ERROR(ENOTSUP)); 2414 if (!dmu_objset_projectquota_enabled(os) && 2415 dmu_objset_userobjspace_present(os)) 2416 return (SET_ERROR(ENOTSUP)); 2417 2418 if (dmu_objset_userobjused_enabled(os)) 2419 dmu_objset_ds(os)->ds_feature_activation[ 2420 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2421 if (dmu_objset_projectquota_enabled(os)) 2422 dmu_objset_ds(os)->ds_feature_activation[ 2423 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2424 2425 err = dmu_objset_space_upgrade(os); 2426 if (err) 2427 return (err); 2428 2429 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2430 if (dmu_objset_userobjused_enabled(os)) 2431 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2432 if (dmu_objset_projectquota_enabled(os)) 2433 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2434 2435 txg_wait_synced(dmu_objset_pool(os), 0); 2436 return (0); 2437 } 2438 2439 void 2440 dmu_objset_id_quota_upgrade(objset_t *os) 2441 { 2442 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2443 } 2444 2445 boolean_t 2446 dmu_objset_userobjspace_upgradable(objset_t *os) 2447 { 2448 return (dmu_objset_type(os) == DMU_OST_ZFS && 2449 !dmu_objset_is_snapshot(os) && 2450 dmu_objset_userobjused_enabled(os) && 2451 !dmu_objset_userobjspace_present(os) && 2452 spa_writeable(dmu_objset_spa(os))); 2453 } 2454 2455 boolean_t 2456 dmu_objset_projectquota_upgradable(objset_t *os) 2457 { 2458 return (dmu_objset_type(os) == DMU_OST_ZFS && 2459 !dmu_objset_is_snapshot(os) && 2460 dmu_objset_projectquota_enabled(os) && 2461 !dmu_objset_projectquota_present(os) && 2462 spa_writeable(dmu_objset_spa(os))); 2463 } 2464 2465 void 2466 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2467 uint64_t *usedobjsp, uint64_t *availobjsp) 2468 { 2469 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2470 usedobjsp, availobjsp); 2471 } 2472 2473 uint64_t 2474 dmu_objset_fsid_guid(objset_t *os) 2475 { 2476 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2477 } 2478 2479 void 2480 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2481 { 2482 stat->dds_type = os->os_phys->os_type; 2483 if (os->os_dsl_dataset) 2484 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2485 } 2486 2487 void 2488 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2489 { 2490 ASSERT(os->os_dsl_dataset || 2491 os->os_phys->os_type == DMU_OST_META); 2492 2493 if (os->os_dsl_dataset != NULL) 2494 dsl_dataset_stats(os->os_dsl_dataset, nv); 2495 2496 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2497 os->os_phys->os_type); 2498 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2499 dmu_objset_userspace_present(os)); 2500 } 2501 2502 int 2503 dmu_objset_is_snapshot(objset_t *os) 2504 { 2505 if (os->os_dsl_dataset != NULL) 2506 return (os->os_dsl_dataset->ds_is_snapshot); 2507 else 2508 return (B_FALSE); 2509 } 2510 2511 int 2512 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2513 boolean_t *conflict) 2514 { 2515 dsl_dataset_t *ds = os->os_dsl_dataset; 2516 uint64_t ignored; 2517 2518 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2519 return (SET_ERROR(ENOENT)); 2520 2521 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2522 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2523 MT_NORMALIZE, real, maxlen, conflict)); 2524 } 2525 2526 int 2527 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2528 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2529 { 2530 dsl_dataset_t *ds = os->os_dsl_dataset; 2531 zap_cursor_t cursor; 2532 zap_attribute_t attr; 2533 2534 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2535 2536 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2537 return (SET_ERROR(ENOENT)); 2538 2539 zap_cursor_init_serialized(&cursor, 2540 ds->ds_dir->dd_pool->dp_meta_objset, 2541 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2542 2543 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2544 zap_cursor_fini(&cursor); 2545 return (SET_ERROR(ENOENT)); 2546 } 2547 2548 if (strlen(attr.za_name) + 1 > namelen) { 2549 zap_cursor_fini(&cursor); 2550 return (SET_ERROR(ENAMETOOLONG)); 2551 } 2552 2553 (void) strlcpy(name, attr.za_name, namelen); 2554 if (idp) 2555 *idp = attr.za_first_integer; 2556 if (case_conflict) 2557 *case_conflict = attr.za_normalization_conflict; 2558 zap_cursor_advance(&cursor); 2559 *offp = zap_cursor_serialize(&cursor); 2560 zap_cursor_fini(&cursor); 2561 2562 return (0); 2563 } 2564 2565 int 2566 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2567 { 2568 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2569 } 2570 2571 int 2572 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2573 uint64_t *idp, uint64_t *offp) 2574 { 2575 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2576 zap_cursor_t cursor; 2577 zap_attribute_t attr; 2578 2579 /* there is no next dir on a snapshot! */ 2580 if (os->os_dsl_dataset->ds_object != 2581 dsl_dir_phys(dd)->dd_head_dataset_obj) 2582 return (SET_ERROR(ENOENT)); 2583 2584 zap_cursor_init_serialized(&cursor, 2585 dd->dd_pool->dp_meta_objset, 2586 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2587 2588 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2589 zap_cursor_fini(&cursor); 2590 return (SET_ERROR(ENOENT)); 2591 } 2592 2593 if (strlen(attr.za_name) + 1 > namelen) { 2594 zap_cursor_fini(&cursor); 2595 return (SET_ERROR(ENAMETOOLONG)); 2596 } 2597 2598 (void) strlcpy(name, attr.za_name, namelen); 2599 if (idp) 2600 *idp = attr.za_first_integer; 2601 zap_cursor_advance(&cursor); 2602 *offp = zap_cursor_serialize(&cursor); 2603 zap_cursor_fini(&cursor); 2604 2605 return (0); 2606 } 2607 2608 typedef struct dmu_objset_find_ctx { 2609 taskq_t *dc_tq; 2610 dsl_pool_t *dc_dp; 2611 uint64_t dc_ddobj; 2612 char *dc_ddname; /* last component of ddobj's name */ 2613 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2614 void *dc_arg; 2615 int dc_flags; 2616 kmutex_t *dc_error_lock; 2617 int *dc_error; 2618 } dmu_objset_find_ctx_t; 2619 2620 static void 2621 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2622 { 2623 dsl_pool_t *dp = dcp->dc_dp; 2624 dsl_dir_t *dd; 2625 dsl_dataset_t *ds; 2626 zap_cursor_t zc; 2627 zap_attribute_t *attr; 2628 uint64_t thisobj; 2629 int err = 0; 2630 2631 /* don't process if there already was an error */ 2632 if (*dcp->dc_error != 0) 2633 goto out; 2634 2635 /* 2636 * Note: passing the name (dc_ddname) here is optional, but it 2637 * improves performance because we don't need to call 2638 * zap_value_search() to determine the name. 2639 */ 2640 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2641 if (err != 0) 2642 goto out; 2643 2644 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2645 if (dd->dd_myname[0] == '$') { 2646 dsl_dir_rele(dd, FTAG); 2647 goto out; 2648 } 2649 2650 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2651 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2652 2653 /* 2654 * Iterate over all children. 2655 */ 2656 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2657 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2658 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2659 zap_cursor_retrieve(&zc, attr) == 0; 2660 (void) zap_cursor_advance(&zc)) { 2661 ASSERT3U(attr->za_integer_length, ==, 2662 sizeof (uint64_t)); 2663 ASSERT3U(attr->za_num_integers, ==, 1); 2664 2665 dmu_objset_find_ctx_t *child_dcp = 2666 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2667 *child_dcp = *dcp; 2668 child_dcp->dc_ddobj = attr->za_first_integer; 2669 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2670 if (dcp->dc_tq != NULL) 2671 (void) taskq_dispatch(dcp->dc_tq, 2672 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2673 else 2674 dmu_objset_find_dp_impl(child_dcp); 2675 } 2676 zap_cursor_fini(&zc); 2677 } 2678 2679 /* 2680 * Iterate over all snapshots. 2681 */ 2682 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2683 dsl_dataset_t *ds; 2684 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2685 2686 if (err == 0) { 2687 uint64_t snapobj; 2688 2689 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2690 dsl_dataset_rele(ds, FTAG); 2691 2692 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2693 zap_cursor_retrieve(&zc, attr) == 0; 2694 (void) zap_cursor_advance(&zc)) { 2695 ASSERT3U(attr->za_integer_length, ==, 2696 sizeof (uint64_t)); 2697 ASSERT3U(attr->za_num_integers, ==, 1); 2698 2699 err = dsl_dataset_hold_obj(dp, 2700 attr->za_first_integer, FTAG, &ds); 2701 if (err != 0) 2702 break; 2703 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2704 dsl_dataset_rele(ds, FTAG); 2705 if (err != 0) 2706 break; 2707 } 2708 zap_cursor_fini(&zc); 2709 } 2710 } 2711 2712 kmem_free(attr, sizeof (zap_attribute_t)); 2713 2714 if (err != 0) { 2715 dsl_dir_rele(dd, FTAG); 2716 goto out; 2717 } 2718 2719 /* 2720 * Apply to self. 2721 */ 2722 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2723 2724 /* 2725 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2726 * that the dir will remain cached, and we won't have to re-instantiate 2727 * it (which could be expensive due to finding its name via 2728 * zap_value_search()). 2729 */ 2730 dsl_dir_rele(dd, FTAG); 2731 if (err != 0) 2732 goto out; 2733 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2734 dsl_dataset_rele(ds, FTAG); 2735 2736 out: 2737 if (err != 0) { 2738 mutex_enter(dcp->dc_error_lock); 2739 /* only keep first error */ 2740 if (*dcp->dc_error == 0) 2741 *dcp->dc_error = err; 2742 mutex_exit(dcp->dc_error_lock); 2743 } 2744 2745 if (dcp->dc_ddname != NULL) 2746 spa_strfree(dcp->dc_ddname); 2747 kmem_free(dcp, sizeof (*dcp)); 2748 } 2749 2750 static void 2751 dmu_objset_find_dp_cb(void *arg) 2752 { 2753 dmu_objset_find_ctx_t *dcp = arg; 2754 dsl_pool_t *dp = dcp->dc_dp; 2755 2756 /* 2757 * We need to get a pool_config_lock here, as there are several 2758 * assert(pool_config_held) down the stack. Getting a lock via 2759 * dsl_pool_config_enter is risky, as it might be stalled by a 2760 * pending writer. This would deadlock, as the write lock can 2761 * only be granted when our parent thread gives up the lock. 2762 * The _prio interface gives us priority over a pending writer. 2763 */ 2764 dsl_pool_config_enter_prio(dp, FTAG); 2765 2766 dmu_objset_find_dp_impl(dcp); 2767 2768 dsl_pool_config_exit(dp, FTAG); 2769 } 2770 2771 /* 2772 * Find objsets under and including ddobj, call func(ds) on each. 2773 * The order for the enumeration is completely undefined. 2774 * func is called with dsl_pool_config held. 2775 */ 2776 int 2777 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2778 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2779 { 2780 int error = 0; 2781 taskq_t *tq = NULL; 2782 int ntasks; 2783 dmu_objset_find_ctx_t *dcp; 2784 kmutex_t err_lock; 2785 2786 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2787 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2788 dcp->dc_tq = NULL; 2789 dcp->dc_dp = dp; 2790 dcp->dc_ddobj = ddobj; 2791 dcp->dc_ddname = NULL; 2792 dcp->dc_func = func; 2793 dcp->dc_arg = arg; 2794 dcp->dc_flags = flags; 2795 dcp->dc_error_lock = &err_lock; 2796 dcp->dc_error = &error; 2797 2798 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2799 /* 2800 * In case a write lock is held we can't make use of 2801 * parallelism, as down the stack of the worker threads 2802 * the lock is asserted via dsl_pool_config_held. 2803 * In case of a read lock this is solved by getting a read 2804 * lock in each worker thread, which isn't possible in case 2805 * of a writer lock. So we fall back to the synchronous path 2806 * here. 2807 * In the future it might be possible to get some magic into 2808 * dsl_pool_config_held in a way that it returns true for 2809 * the worker threads so that a single lock held from this 2810 * thread suffices. For now, stay single threaded. 2811 */ 2812 dmu_objset_find_dp_impl(dcp); 2813 mutex_destroy(&err_lock); 2814 2815 return (error); 2816 } 2817 2818 ntasks = dmu_find_threads; 2819 if (ntasks == 0) 2820 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2821 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2822 INT_MAX, 0); 2823 if (tq == NULL) { 2824 kmem_free(dcp, sizeof (*dcp)); 2825 mutex_destroy(&err_lock); 2826 2827 return (SET_ERROR(ENOMEM)); 2828 } 2829 dcp->dc_tq = tq; 2830 2831 /* dcp will be freed by task */ 2832 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2833 2834 /* 2835 * PORTING: this code relies on the property of taskq_wait to wait 2836 * until no more tasks are queued and no more tasks are active. As 2837 * we always queue new tasks from within other tasks, task_wait 2838 * reliably waits for the full recursion to finish, even though we 2839 * enqueue new tasks after taskq_wait has been called. 2840 * On platforms other than illumos, taskq_wait may not have this 2841 * property. 2842 */ 2843 taskq_wait(tq); 2844 taskq_destroy(tq); 2845 mutex_destroy(&err_lock); 2846 2847 return (error); 2848 } 2849 2850 /* 2851 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2852 * The dp_config_rwlock must not be held when this is called, and it 2853 * will not be held when the callback is called. 2854 * Therefore this function should only be used when the pool is not changing 2855 * (e.g. in syncing context), or the callback can deal with the possible races. 2856 */ 2857 static int 2858 dmu_objset_find_impl(spa_t *spa, const char *name, 2859 int func(const char *, void *), void *arg, int flags) 2860 { 2861 dsl_dir_t *dd; 2862 dsl_pool_t *dp = spa_get_dsl(spa); 2863 dsl_dataset_t *ds; 2864 zap_cursor_t zc; 2865 zap_attribute_t *attr; 2866 char *child; 2867 uint64_t thisobj; 2868 int err; 2869 2870 dsl_pool_config_enter(dp, FTAG); 2871 2872 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2873 if (err != 0) { 2874 dsl_pool_config_exit(dp, FTAG); 2875 return (err); 2876 } 2877 2878 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2879 if (dd->dd_myname[0] == '$') { 2880 dsl_dir_rele(dd, FTAG); 2881 dsl_pool_config_exit(dp, FTAG); 2882 return (0); 2883 } 2884 2885 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2886 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2887 2888 /* 2889 * Iterate over all children. 2890 */ 2891 if (flags & DS_FIND_CHILDREN) { 2892 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2893 dsl_dir_phys(dd)->dd_child_dir_zapobj); 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", name, attr->za_name); 2901 dsl_pool_config_exit(dp, FTAG); 2902 err = dmu_objset_find_impl(spa, child, 2903 func, arg, flags); 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 if (err != 0) { 2912 dsl_dir_rele(dd, FTAG); 2913 dsl_pool_config_exit(dp, FTAG); 2914 kmem_free(attr, sizeof (zap_attribute_t)); 2915 return (err); 2916 } 2917 } 2918 2919 /* 2920 * Iterate over all snapshots. 2921 */ 2922 if (flags & DS_FIND_SNAPSHOTS) { 2923 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2924 2925 if (err == 0) { 2926 uint64_t snapobj; 2927 2928 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2929 dsl_dataset_rele(ds, FTAG); 2930 2931 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2932 zap_cursor_retrieve(&zc, attr) == 0; 2933 (void) zap_cursor_advance(&zc)) { 2934 ASSERT3U(attr->za_integer_length, ==, 2935 sizeof (uint64_t)); 2936 ASSERT3U(attr->za_num_integers, ==, 1); 2937 2938 child = kmem_asprintf("%s@%s", 2939 name, attr->za_name); 2940 dsl_pool_config_exit(dp, FTAG); 2941 err = func(child, arg); 2942 dsl_pool_config_enter(dp, FTAG); 2943 kmem_strfree(child); 2944 if (err != 0) 2945 break; 2946 } 2947 zap_cursor_fini(&zc); 2948 } 2949 } 2950 2951 dsl_dir_rele(dd, FTAG); 2952 kmem_free(attr, sizeof (zap_attribute_t)); 2953 dsl_pool_config_exit(dp, FTAG); 2954 2955 if (err != 0) 2956 return (err); 2957 2958 /* Apply to self. */ 2959 return (func(name, arg)); 2960 } 2961 2962 /* 2963 * See comment above dmu_objset_find_impl(). 2964 */ 2965 int 2966 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 2967 int flags) 2968 { 2969 spa_t *spa; 2970 int error; 2971 2972 error = spa_open(name, &spa, FTAG); 2973 if (error != 0) 2974 return (error); 2975 error = dmu_objset_find_impl(spa, name, func, arg, flags); 2976 spa_close(spa, FTAG); 2977 return (error); 2978 } 2979 2980 boolean_t 2981 dmu_objset_incompatible_encryption_version(objset_t *os) 2982 { 2983 return (dsl_dir_incompatible_encryption_version( 2984 os->os_dsl_dataset->ds_dir)); 2985 } 2986 2987 void 2988 dmu_objset_set_user(objset_t *os, void *user_ptr) 2989 { 2990 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2991 os->os_user_ptr = user_ptr; 2992 } 2993 2994 void * 2995 dmu_objset_get_user(objset_t *os) 2996 { 2997 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 2998 return (os->os_user_ptr); 2999 } 3000 3001 /* 3002 * Determine name of filesystem, given name of snapshot. 3003 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 3004 */ 3005 int 3006 dmu_fsname(const char *snapname, char *buf) 3007 { 3008 char *atp = strchr(snapname, '@'); 3009 if (atp == NULL) 3010 return (SET_ERROR(EINVAL)); 3011 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 3012 return (SET_ERROR(ENAMETOOLONG)); 3013 (void) strlcpy(buf, snapname, atp - snapname + 1); 3014 return (0); 3015 } 3016 3017 /* 3018 * Call when we think we're going to write/free space in open context 3019 * to track the amount of dirty data in the open txg, which is also the 3020 * amount of memory that can not be evicted until this txg syncs. 3021 * 3022 * Note that there are two conditions where this can be called from 3023 * syncing context: 3024 * 3025 * [1] When we just created the dataset, in which case we go on with 3026 * updating any accounting of dirty data as usual. 3027 * [2] When we are dirtying MOS data, in which case we only update the 3028 * pool's accounting of dirty data. 3029 */ 3030 void 3031 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3032 { 3033 dsl_dataset_t *ds = os->os_dsl_dataset; 3034 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3035 3036 if (ds != NULL) { 3037 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3038 } 3039 3040 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3041 } 3042 3043 #if defined(_KERNEL) 3044 EXPORT_SYMBOL(dmu_objset_zil); 3045 EXPORT_SYMBOL(dmu_objset_pool); 3046 EXPORT_SYMBOL(dmu_objset_ds); 3047 EXPORT_SYMBOL(dmu_objset_type); 3048 EXPORT_SYMBOL(dmu_objset_name); 3049 EXPORT_SYMBOL(dmu_objset_hold); 3050 EXPORT_SYMBOL(dmu_objset_hold_flags); 3051 EXPORT_SYMBOL(dmu_objset_own); 3052 EXPORT_SYMBOL(dmu_objset_rele); 3053 EXPORT_SYMBOL(dmu_objset_rele_flags); 3054 EXPORT_SYMBOL(dmu_objset_disown); 3055 EXPORT_SYMBOL(dmu_objset_from_ds); 3056 EXPORT_SYMBOL(dmu_objset_create); 3057 EXPORT_SYMBOL(dmu_objset_clone); 3058 EXPORT_SYMBOL(dmu_objset_stats); 3059 EXPORT_SYMBOL(dmu_objset_fast_stat); 3060 EXPORT_SYMBOL(dmu_objset_spa); 3061 EXPORT_SYMBOL(dmu_objset_space); 3062 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3063 EXPORT_SYMBOL(dmu_objset_find); 3064 EXPORT_SYMBOL(dmu_objset_byteswap); 3065 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3066 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3067 EXPORT_SYMBOL(dmu_objset_dnodesize); 3068 3069 EXPORT_SYMBOL(dmu_objset_sync); 3070 EXPORT_SYMBOL(dmu_objset_is_dirty); 3071 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3072 EXPORT_SYMBOL(dmu_objset_create_impl); 3073 EXPORT_SYMBOL(dmu_objset_open_impl); 3074 EXPORT_SYMBOL(dmu_objset_evict); 3075 EXPORT_SYMBOL(dmu_objset_register_type); 3076 EXPORT_SYMBOL(dmu_objset_sync_done); 3077 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3078 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3079 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3080 EXPORT_SYMBOL(dmu_objset_userspace_present); 3081 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3082 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3083 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3084 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3085 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3086 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3087 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3088 #endif 3089