1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 25 * Copyright (c) 2012, 2020 by Delphix. All rights reserved. 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 28 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 29 * Copyright (c) 2015, STRATO AG, Inc. All rights reserved. 30 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 31 * Copyright 2017 Nexenta Systems, Inc. 32 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved. 33 * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. 34 * Copyright (c) 2019, Klara Inc. 35 * Copyright (c) 2019, Allan Jude 36 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP. 37 * Copyright (c) 2025, Rob Norris <robn@despairlabs.com> 38 */ 39 40 /* Portions Copyright 2010 Robert Milkowski */ 41 42 #include <sys/cred.h> 43 #include <sys/zfs_context.h> 44 #include <sys/dmu_objset.h> 45 #include <sys/dsl_dir.h> 46 #include <sys/dsl_dataset.h> 47 #include <sys/dsl_prop.h> 48 #include <sys/dsl_pool.h> 49 #include <sys/dsl_synctask.h> 50 #include <sys/dsl_deleg.h> 51 #include <sys/dnode.h> 52 #include <sys/dbuf.h> 53 #include <sys/zvol.h> 54 #include <sys/dmu_tx.h> 55 #include <sys/zap.h> 56 #include <sys/zil.h> 57 #include <sys/dmu_impl.h> 58 #include <sys/zfs_ioctl.h> 59 #include <sys/sa.h> 60 #include <sys/zfs_onexit.h> 61 #include <sys/dsl_destroy.h> 62 #include <sys/vdev.h> 63 #include <sys/zfeature.h> 64 #include <sys/policy.h> 65 #include <sys/spa_impl.h> 66 #include <sys/dmu_recv.h> 67 #include <sys/zfs_project.h> 68 #include "zfs_namecheck.h" 69 #include <sys/vdev_impl.h> 70 #include <sys/arc.h> 71 #include <cityhash.h> 72 #include <sys/cred.h> 73 74 /* 75 * Needed to close a window in dnode_move() that allows the objset to be freed 76 * before it can be safely accessed. 77 */ 78 krwlock_t os_lock; 79 80 /* 81 * Tunable to overwrite the maximum number of threads for the parallelization 82 * of dmu_objset_find_dp, needed to speed up the import of pools with many 83 * datasets. 84 * Default is 4 times the number of leaf vdevs. 85 */ 86 static const int dmu_find_threads = 0; 87 88 /* 89 * Backfill lower metadnode objects after this many have been freed. 90 * Backfilling negatively impacts object creation rates, so only do it 91 * if there are enough holes to fill. 92 */ 93 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 94 95 static const char *upgrade_tag = "upgrade_tag"; 96 97 static void dmu_objset_find_dp_cb(void *arg); 98 99 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 100 static void dmu_objset_upgrade_stop(objset_t *os); 101 102 void 103 dmu_objset_init(void) 104 { 105 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 106 } 107 108 void 109 dmu_objset_fini(void) 110 { 111 rw_destroy(&os_lock); 112 } 113 114 spa_t * 115 dmu_objset_spa(objset_t *os) 116 { 117 return (os->os_spa); 118 } 119 120 zilog_t * 121 dmu_objset_zil(objset_t *os) 122 { 123 return (os->os_zil); 124 } 125 126 dsl_pool_t * 127 dmu_objset_pool(objset_t *os) 128 { 129 dsl_dataset_t *ds; 130 131 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 132 return (ds->ds_dir->dd_pool); 133 else 134 return (spa_get_dsl(os->os_spa)); 135 } 136 137 dsl_dataset_t * 138 dmu_objset_ds(objset_t *os) 139 { 140 return (os->os_dsl_dataset); 141 } 142 143 dmu_objset_type_t 144 dmu_objset_type(objset_t *os) 145 { 146 return (os->os_phys->os_type); 147 } 148 149 void 150 dmu_objset_name(objset_t *os, char *buf) 151 { 152 dsl_dataset_name(os->os_dsl_dataset, buf); 153 } 154 155 uint64_t 156 dmu_objset_id(objset_t *os) 157 { 158 dsl_dataset_t *ds = os->os_dsl_dataset; 159 160 return (ds ? ds->ds_object : 0); 161 } 162 163 uint64_t 164 dmu_objset_dnodesize(objset_t *os) 165 { 166 return (os->os_dnodesize); 167 } 168 169 zfs_sync_type_t 170 dmu_objset_syncprop(objset_t *os) 171 { 172 return (os->os_sync); 173 } 174 175 zfs_logbias_op_t 176 dmu_objset_logbias(objset_t *os) 177 { 178 return (os->os_logbias); 179 } 180 181 static void 182 checksum_changed_cb(void *arg, uint64_t newval) 183 { 184 objset_t *os = arg; 185 186 /* 187 * Inheritance should have been done by now. 188 */ 189 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 190 191 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 192 } 193 194 static void 195 compression_changed_cb(void *arg, uint64_t newval) 196 { 197 objset_t *os = arg; 198 199 /* 200 * Inheritance and range checking should have been done by now. 201 */ 202 ASSERT(newval != ZIO_COMPRESS_INHERIT); 203 204 os->os_compress = zio_compress_select(os->os_spa, 205 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 206 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 207 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 208 } 209 210 static void 211 copies_changed_cb(void *arg, uint64_t newval) 212 { 213 objset_t *os = arg; 214 215 /* 216 * Inheritance and range checking should have been done by now. 217 */ 218 ASSERT(newval > 0); 219 ASSERT(newval <= spa_max_replication(os->os_spa)); 220 221 os->os_copies = newval; 222 } 223 224 static void 225 dedup_changed_cb(void *arg, uint64_t newval) 226 { 227 objset_t *os = arg; 228 spa_t *spa = os->os_spa; 229 enum zio_checksum checksum; 230 231 /* 232 * Inheritance should have been done by now. 233 */ 234 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 235 236 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 237 238 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 239 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 240 } 241 242 static void 243 primary_cache_changed_cb(void *arg, uint64_t newval) 244 { 245 objset_t *os = arg; 246 247 /* 248 * Inheritance and range checking should have been done by now. 249 */ 250 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 251 newval == ZFS_CACHE_METADATA); 252 253 os->os_primary_cache = newval; 254 } 255 256 static void 257 secondary_cache_changed_cb(void *arg, uint64_t newval) 258 { 259 objset_t *os = arg; 260 261 /* 262 * Inheritance and range checking should have been done by now. 263 */ 264 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 265 newval == ZFS_CACHE_METADATA); 266 267 os->os_secondary_cache = newval; 268 } 269 270 static void 271 prefetch_changed_cb(void *arg, uint64_t newval) 272 { 273 objset_t *os = arg; 274 275 /* 276 * Inheritance should have been done by now. 277 */ 278 ASSERT(newval == ZFS_PREFETCH_ALL || newval == ZFS_PREFETCH_NONE || 279 newval == ZFS_PREFETCH_METADATA); 280 os->os_prefetch = newval; 281 } 282 283 static void 284 sync_changed_cb(void *arg, uint64_t newval) 285 { 286 objset_t *os = arg; 287 288 /* 289 * Inheritance and range checking should have been done by now. 290 */ 291 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 292 newval == ZFS_SYNC_DISABLED); 293 294 os->os_sync = newval; 295 if (os->os_zil) 296 zil_set_sync(os->os_zil, newval); 297 } 298 299 static void 300 redundant_metadata_changed_cb(void *arg, uint64_t newval) 301 { 302 objset_t *os = arg; 303 304 /* 305 * Inheritance and range checking should have been done by now. 306 */ 307 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 308 newval == ZFS_REDUNDANT_METADATA_MOST || 309 newval == ZFS_REDUNDANT_METADATA_SOME || 310 newval == ZFS_REDUNDANT_METADATA_NONE); 311 312 os->os_redundant_metadata = newval; 313 } 314 315 static void 316 dnodesize_changed_cb(void *arg, uint64_t newval) 317 { 318 objset_t *os = arg; 319 320 switch (newval) { 321 case ZFS_DNSIZE_LEGACY: 322 os->os_dnodesize = DNODE_MIN_SIZE; 323 break; 324 case ZFS_DNSIZE_AUTO: 325 /* 326 * Choose a dnode size that will work well for most 327 * workloads if the user specified "auto". Future code 328 * improvements could dynamically select a dnode size 329 * based on observed workload patterns. 330 */ 331 os->os_dnodesize = DNODE_MIN_SIZE * 2; 332 break; 333 case ZFS_DNSIZE_1K: 334 case ZFS_DNSIZE_2K: 335 case ZFS_DNSIZE_4K: 336 case ZFS_DNSIZE_8K: 337 case ZFS_DNSIZE_16K: 338 os->os_dnodesize = newval; 339 break; 340 } 341 } 342 343 static void 344 smallblk_changed_cb(void *arg, uint64_t newval) 345 { 346 objset_t *os = arg; 347 348 /* 349 * Inheritance and range checking should have been done by now. 350 */ 351 ASSERT(newval <= SPA_MAXBLOCKSIZE); 352 ASSERT(ISP2(newval)); 353 354 os->os_zpl_special_smallblock = newval; 355 } 356 357 static void 358 direct_changed_cb(void *arg, uint64_t newval) 359 { 360 objset_t *os = arg; 361 362 /* 363 * Inheritance and range checking should have been done by now. 364 */ 365 ASSERT(newval == ZFS_DIRECT_DISABLED || newval == ZFS_DIRECT_STANDARD || 366 newval == ZFS_DIRECT_ALWAYS); 367 368 os->os_direct = newval; 369 } 370 371 static void 372 logbias_changed_cb(void *arg, uint64_t newval) 373 { 374 objset_t *os = arg; 375 376 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 377 newval == ZFS_LOGBIAS_THROUGHPUT); 378 os->os_logbias = newval; 379 if (os->os_zil) 380 zil_set_logbias(os->os_zil, newval); 381 } 382 383 static void 384 recordsize_changed_cb(void *arg, uint64_t newval) 385 { 386 objset_t *os = arg; 387 388 os->os_recordsize = newval; 389 } 390 391 void 392 dmu_objset_byteswap(void *buf, size_t size) 393 { 394 objset_phys_t *osp = buf; 395 396 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 397 size == sizeof (objset_phys_t)); 398 dnode_byteswap(&osp->os_meta_dnode); 399 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 400 osp->os_type = BSWAP_64(osp->os_type); 401 osp->os_flags = BSWAP_64(osp->os_flags); 402 if (size >= OBJSET_PHYS_SIZE_V2) { 403 dnode_byteswap(&osp->os_userused_dnode); 404 dnode_byteswap(&osp->os_groupused_dnode); 405 if (size >= sizeof (objset_phys_t)) 406 dnode_byteswap(&osp->os_projectused_dnode); 407 } 408 } 409 410 /* 411 * Runs cityhash on the objset_t pointer and the object number. 412 */ 413 static uint64_t 414 dnode_hash(const objset_t *os, uint64_t obj) 415 { 416 uintptr_t osv = (uintptr_t)os; 417 return (cityhash2((uint64_t)osv, obj)); 418 } 419 420 static unsigned int 421 dnode_multilist_index_func(multilist_t *ml, void *obj) 422 { 423 dnode_t *dn = obj; 424 425 /* 426 * The low order bits of the hash value are thought to be 427 * distributed evenly. Otherwise, in the case that the multilist 428 * has a power of two number of sublists, each sublists' usage 429 * would not be evenly distributed. In this context full 64bit 430 * division would be a waste of time, so limit it to 32 bits. 431 */ 432 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 433 multilist_get_num_sublists(ml)); 434 } 435 436 static inline boolean_t 437 dmu_os_is_l2cacheable(objset_t *os) 438 { 439 if (os->os_secondary_cache == ZFS_CACHE_ALL || 440 os->os_secondary_cache == ZFS_CACHE_METADATA) { 441 if (l2arc_exclude_special == 0) 442 return (B_TRUE); 443 444 blkptr_t *bp = os->os_rootbp; 445 if (bp == NULL || BP_IS_HOLE(bp)) 446 return (B_FALSE); 447 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva); 448 vdev_t *rvd = os->os_spa->spa_root_vdev; 449 vdev_t *vd = NULL; 450 451 if (vdev < rvd->vdev_children) 452 vd = rvd->vdev_child[vdev]; 453 454 if (vd == NULL) 455 return (B_TRUE); 456 457 if (vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL && 458 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) 459 return (B_TRUE); 460 } 461 return (B_FALSE); 462 } 463 464 /* 465 * Instantiates the objset_t in-memory structure corresponding to the 466 * objset_phys_t that's pointed to by the specified blkptr_t. 467 */ 468 int 469 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 470 objset_t **osp) 471 { 472 objset_t *os; 473 int i, err; 474 475 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 476 ASSERT(!BP_IS_REDACTED(bp)); 477 478 /* 479 * We need the pool config lock to get properties. 480 */ 481 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 482 483 /* 484 * The $ORIGIN dataset (if it exists) doesn't have an associated 485 * objset, so there's no reason to open it. The $ORIGIN dataset 486 * will not exist on pools older than SPA_VERSION_ORIGIN. 487 */ 488 if (ds != NULL && spa_get_dsl(spa) != NULL && 489 spa_get_dsl(spa)->dp_origin_snap != NULL) { 490 ASSERT3P(ds->ds_dir, !=, 491 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 492 } 493 494 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 495 os->os_dsl_dataset = ds; 496 os->os_spa = spa; 497 os->os_rootbp = bp; 498 if (!BP_IS_HOLE(os->os_rootbp)) { 499 arc_flags_t aflags = ARC_FLAG_WAIT; 500 zbookmark_phys_t zb; 501 int size; 502 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL; 503 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 504 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 505 506 if (dmu_os_is_l2cacheable(os)) 507 aflags |= ARC_FLAG_L2CACHE; 508 509 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 510 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 511 ASSERT(BP_IS_AUTHENTICATED(bp)); 512 zio_flags |= ZIO_FLAG_RAW; 513 } 514 515 dprintf_bp(os->os_rootbp, "reading %s", ""); 516 err = arc_read(NULL, spa, os->os_rootbp, 517 arc_getbuf_func, &os->os_phys_buf, 518 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 519 if (err != 0) { 520 kmem_free(os, sizeof (objset_t)); 521 /* convert checksum errors into IO errors */ 522 if (err == ECKSUM) 523 err = SET_ERROR(EIO); 524 return (err); 525 } 526 527 if (spa_version(spa) < SPA_VERSION_USERSPACE) 528 size = OBJSET_PHYS_SIZE_V1; 529 else if (!spa_feature_is_enabled(spa, 530 SPA_FEATURE_PROJECT_QUOTA)) 531 size = OBJSET_PHYS_SIZE_V2; 532 else 533 size = sizeof (objset_phys_t); 534 535 /* Increase the blocksize if we are permitted. */ 536 if (arc_buf_size(os->os_phys_buf) < size) { 537 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 538 ARC_BUFC_METADATA, size); 539 memset(buf->b_data, 0, size); 540 memcpy(buf->b_data, os->os_phys_buf->b_data, 541 arc_buf_size(os->os_phys_buf)); 542 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 543 os->os_phys_buf = buf; 544 } 545 546 os->os_phys = os->os_phys_buf->b_data; 547 os->os_flags = os->os_phys->os_flags; 548 } else { 549 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 550 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 551 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 552 ARC_BUFC_METADATA, size); 553 os->os_phys = os->os_phys_buf->b_data; 554 memset(os->os_phys, 0, size); 555 } 556 /* 557 * These properties will be filled in by the logic in zfs_get_zplprop() 558 * when they are queried for the first time. 559 */ 560 os->os_version = OBJSET_PROP_UNINITIALIZED; 561 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 562 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 563 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 564 565 /* 566 * Note: the changed_cb will be called once before the register 567 * func returns, thus changing the checksum/compression from the 568 * default (fletcher2/off). Snapshots don't need to know about 569 * checksum/compression/copies. 570 */ 571 if (ds != NULL) { 572 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 573 574 err = dsl_prop_register(ds, 575 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 576 primary_cache_changed_cb, os); 577 if (err == 0) { 578 err = dsl_prop_register(ds, 579 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 580 secondary_cache_changed_cb, os); 581 } 582 if (err == 0) { 583 err = dsl_prop_register(ds, 584 zfs_prop_to_name(ZFS_PROP_PREFETCH), 585 prefetch_changed_cb, os); 586 } 587 if (!ds->ds_is_snapshot) { 588 if (err == 0) { 589 err = dsl_prop_register(ds, 590 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 591 checksum_changed_cb, os); 592 } 593 if (err == 0) { 594 err = dsl_prop_register(ds, 595 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 596 compression_changed_cb, os); 597 } 598 if (err == 0) { 599 err = dsl_prop_register(ds, 600 zfs_prop_to_name(ZFS_PROP_COPIES), 601 copies_changed_cb, os); 602 } 603 if (err == 0) { 604 err = dsl_prop_register(ds, 605 zfs_prop_to_name(ZFS_PROP_DEDUP), 606 dedup_changed_cb, os); 607 } 608 if (err == 0) { 609 err = dsl_prop_register(ds, 610 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 611 logbias_changed_cb, os); 612 } 613 if (err == 0) { 614 err = dsl_prop_register(ds, 615 zfs_prop_to_name(ZFS_PROP_SYNC), 616 sync_changed_cb, os); 617 } 618 if (err == 0) { 619 err = dsl_prop_register(ds, 620 zfs_prop_to_name( 621 ZFS_PROP_REDUNDANT_METADATA), 622 redundant_metadata_changed_cb, os); 623 } 624 if (err == 0) { 625 err = dsl_prop_register(ds, 626 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 627 recordsize_changed_cb, os); 628 } 629 if (err == 0) { 630 err = dsl_prop_register(ds, 631 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 632 dnodesize_changed_cb, os); 633 } 634 if (err == 0) { 635 err = dsl_prop_register(ds, 636 zfs_prop_to_name( 637 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 638 smallblk_changed_cb, os); 639 } 640 if (err == 0) { 641 err = dsl_prop_register(ds, 642 zfs_prop_to_name(ZFS_PROP_DIRECT), 643 direct_changed_cb, os); 644 } 645 } 646 if (err != 0) { 647 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 648 kmem_free(os, sizeof (objset_t)); 649 return (err); 650 } 651 } else { 652 /* It's the meta-objset. */ 653 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 654 os->os_compress = ZIO_COMPRESS_ON; 655 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 656 os->os_encrypted = B_FALSE; 657 os->os_copies = spa_max_replication(spa); 658 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 659 os->os_dedup_verify = B_FALSE; 660 os->os_logbias = ZFS_LOGBIAS_LATENCY; 661 os->os_sync = ZFS_SYNC_STANDARD; 662 os->os_primary_cache = ZFS_CACHE_ALL; 663 os->os_secondary_cache = ZFS_CACHE_ALL; 664 os->os_dnodesize = DNODE_MIN_SIZE; 665 os->os_prefetch = ZFS_PREFETCH_ALL; 666 } 667 668 if (ds == NULL || !ds->ds_is_snapshot) 669 os->os_zil_header = os->os_phys->os_zil_header; 670 os->os_zil = zil_alloc(os, &os->os_zil_header); 671 672 for (i = 0; i < TXG_SIZE; i++) { 673 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 674 offsetof(dnode_t, dn_dirty_link[i]), 675 dnode_multilist_index_func); 676 } 677 list_create(&os->os_dnodes, sizeof (dnode_t), 678 offsetof(dnode_t, dn_link)); 679 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 680 offsetof(dmu_buf_impl_t, db_link)); 681 682 list_link_init(&os->os_evicting_node); 683 684 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 685 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 686 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 687 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 688 os->os_obj_next_percpu_len = boot_ncpus; 689 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 690 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 691 692 dnode_special_open(os, &os->os_phys->os_meta_dnode, 693 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 694 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 695 dnode_special_open(os, &os->os_phys->os_userused_dnode, 696 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 697 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 698 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 699 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 700 dnode_special_open(os, 701 &os->os_phys->os_projectused_dnode, 702 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 703 } 704 705 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 706 707 *osp = os; 708 return (0); 709 } 710 711 int 712 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 713 { 714 int err = 0; 715 716 /* 717 * We need the pool_config lock to manipulate the dsl_dataset_t. 718 * Even if the dataset is long-held, we need the pool_config lock 719 * to open the objset, as it needs to get properties. 720 */ 721 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 722 723 mutex_enter(&ds->ds_opening_lock); 724 if (ds->ds_objset == NULL) { 725 objset_t *os; 726 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 727 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 728 ds, dsl_dataset_get_blkptr(ds), &os); 729 rrw_exit(&ds->ds_bp_rwlock, FTAG); 730 731 if (err == 0) { 732 mutex_enter(&ds->ds_lock); 733 ASSERT(ds->ds_objset == NULL); 734 ds->ds_objset = os; 735 mutex_exit(&ds->ds_lock); 736 } 737 } 738 *osp = ds->ds_objset; 739 mutex_exit(&ds->ds_opening_lock); 740 return (err); 741 } 742 743 /* 744 * Holds the pool while the objset is held. Therefore only one objset 745 * can be held at a time. 746 */ 747 int 748 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag, 749 objset_t **osp) 750 { 751 dsl_pool_t *dp; 752 dsl_dataset_t *ds; 753 int err; 754 ds_hold_flags_t flags; 755 756 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 757 err = dsl_pool_hold(name, tag, &dp); 758 if (err != 0) 759 return (err); 760 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 761 if (err != 0) { 762 dsl_pool_rele(dp, tag); 763 return (err); 764 } 765 766 err = dmu_objset_from_ds(ds, osp); 767 if (err != 0) { 768 dsl_dataset_rele_flags(ds, flags, tag); 769 dsl_pool_rele(dp, tag); 770 } 771 772 return (err); 773 } 774 775 int 776 dmu_objset_hold(const char *name, const void *tag, objset_t **osp) 777 { 778 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 779 } 780 781 static int 782 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 783 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 784 { 785 (void) tag; 786 787 int err = dmu_objset_from_ds(ds, osp); 788 if (err != 0) { 789 return (err); 790 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 791 return (SET_ERROR(EINVAL)); 792 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 793 return (SET_ERROR(EROFS)); 794 } else if (!readonly && decrypt && 795 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 796 return (SET_ERROR(EROFS)); 797 } 798 799 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 800 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 801 zbookmark_phys_t zb; 802 803 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 804 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 805 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 806 &zb, B_FALSE); 807 if (err != 0) 808 return (err); 809 810 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 811 } 812 813 return (0); 814 } 815 816 /* 817 * dsl_pool must not be held when this is called. 818 * Upon successful return, there will be a longhold on the dataset, 819 * and the dsl_pool will not be held. 820 */ 821 int 822 dmu_objset_own(const char *name, dmu_objset_type_t type, 823 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 824 { 825 dsl_pool_t *dp; 826 dsl_dataset_t *ds; 827 int err; 828 ds_hold_flags_t flags; 829 830 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 831 err = dsl_pool_hold(name, FTAG, &dp); 832 if (err != 0) 833 return (err); 834 err = dsl_dataset_own(dp, name, flags, tag, &ds); 835 if (err != 0) { 836 dsl_pool_rele(dp, FTAG); 837 return (err); 838 } 839 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 840 if (err != 0) { 841 dsl_dataset_disown(ds, flags, tag); 842 dsl_pool_rele(dp, FTAG); 843 return (err); 844 } 845 846 /* 847 * User accounting requires the dataset to be decrypted and rw. 848 * We also don't begin user accounting during claiming to help 849 * speed up pool import times and to keep this txg reserved 850 * completely for recovery work. 851 */ 852 if (!readonly && !dp->dp_spa->spa_claiming && 853 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 854 if (dmu_objset_userobjspace_upgradable(*osp) || 855 dmu_objset_projectquota_upgradable(*osp)) { 856 dmu_objset_id_quota_upgrade(*osp); 857 } else if (dmu_objset_userused_enabled(*osp)) { 858 dmu_objset_userspace_upgrade(*osp); 859 } 860 } 861 862 dsl_pool_rele(dp, FTAG); 863 return (0); 864 } 865 866 int 867 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 868 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 869 { 870 dsl_dataset_t *ds; 871 int err; 872 ds_hold_flags_t flags; 873 874 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 875 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 876 if (err != 0) 877 return (err); 878 879 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 880 if (err != 0) { 881 dsl_dataset_disown(ds, flags, tag); 882 return (err); 883 } 884 885 return (0); 886 } 887 888 void 889 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag) 890 { 891 ds_hold_flags_t flags; 892 dsl_pool_t *dp = dmu_objset_pool(os); 893 894 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 895 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 896 dsl_pool_rele(dp, tag); 897 } 898 899 void 900 dmu_objset_rele(objset_t *os, const void *tag) 901 { 902 dmu_objset_rele_flags(os, B_FALSE, tag); 903 } 904 905 /* 906 * When we are called, os MUST refer to an objset associated with a dataset 907 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 908 * == tag. We will then release and reacquire ownership of the dataset while 909 * holding the pool config_rwlock to avoid intervening namespace or ownership 910 * changes may occur. 911 * 912 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 913 * release the hold on its dataset and acquire a new one on the dataset of the 914 * same name so that it can be partially torn down and reconstructed. 915 */ 916 void 917 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 918 boolean_t decrypt, const void *tag) 919 { 920 dsl_pool_t *dp; 921 char name[ZFS_MAX_DATASET_NAME_LEN]; 922 ds_hold_flags_t flags; 923 924 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 925 VERIFY3P(ds, !=, NULL); 926 VERIFY3P(ds->ds_owner, ==, tag); 927 VERIFY(dsl_dataset_long_held(ds)); 928 929 dsl_dataset_name(ds, name); 930 dp = ds->ds_dir->dd_pool; 931 dsl_pool_config_enter(dp, FTAG); 932 dsl_dataset_disown(ds, flags, tag); 933 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 934 dsl_pool_config_exit(dp, FTAG); 935 } 936 937 void 938 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag) 939 { 940 ds_hold_flags_t flags; 941 942 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 943 /* 944 * Stop upgrading thread 945 */ 946 dmu_objset_upgrade_stop(os); 947 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 948 } 949 950 void 951 dmu_objset_evict_dbufs(objset_t *os) 952 { 953 dnode_t *dn_marker; 954 dnode_t *dn; 955 956 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 957 958 mutex_enter(&os->os_lock); 959 dn = list_head(&os->os_dnodes); 960 while (dn != NULL) { 961 /* 962 * Skip dnodes without holds. We have to do this dance 963 * because dnode_add_ref() only works if there is already a 964 * hold. If the dnode has no holds, then it has no dbufs. 965 */ 966 if (dnode_add_ref(dn, FTAG)) { 967 list_insert_after(&os->os_dnodes, dn, dn_marker); 968 mutex_exit(&os->os_lock); 969 970 dnode_evict_dbufs(dn); 971 dnode_rele(dn, FTAG); 972 973 mutex_enter(&os->os_lock); 974 dn = list_next(&os->os_dnodes, dn_marker); 975 list_remove(&os->os_dnodes, dn_marker); 976 } else { 977 dn = list_next(&os->os_dnodes, dn); 978 } 979 } 980 mutex_exit(&os->os_lock); 981 982 kmem_free(dn_marker, sizeof (dnode_t)); 983 984 if (DMU_USERUSED_DNODE(os) != NULL) { 985 if (DMU_PROJECTUSED_DNODE(os) != NULL) 986 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 987 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 988 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 989 } 990 dnode_evict_dbufs(DMU_META_DNODE(os)); 991 } 992 993 /* 994 * Objset eviction processing is split into into two pieces. 995 * The first marks the objset as evicting, evicts any dbufs that 996 * have a refcount of zero, and then queues up the objset for the 997 * second phase of eviction. Once os->os_dnodes has been cleared by 998 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 999 * The second phase closes the special dnodes, dequeues the objset from 1000 * the list of those undergoing eviction, and finally frees the objset. 1001 * 1002 * NOTE: Due to asynchronous eviction processing (invocation of 1003 * dnode_buf_pageout()), it is possible for the meta dnode for the 1004 * objset to have no holds even though os->os_dnodes is not empty. 1005 */ 1006 void 1007 dmu_objset_evict(objset_t *os) 1008 { 1009 dsl_dataset_t *ds = os->os_dsl_dataset; 1010 1011 for (int t = 0; t < TXG_SIZE; t++) 1012 ASSERT(!dmu_objset_is_dirty(os, t)); 1013 1014 if (ds) 1015 dsl_prop_unregister_all(ds, os); 1016 1017 if (os->os_sa) 1018 sa_tear_down(os); 1019 1020 dmu_objset_evict_dbufs(os); 1021 1022 mutex_enter(&os->os_lock); 1023 spa_evicting_os_register(os->os_spa, os); 1024 if (list_is_empty(&os->os_dnodes)) { 1025 mutex_exit(&os->os_lock); 1026 dmu_objset_evict_done(os); 1027 } else { 1028 mutex_exit(&os->os_lock); 1029 } 1030 1031 1032 } 1033 1034 void 1035 dmu_objset_evict_done(objset_t *os) 1036 { 1037 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 1038 1039 dnode_special_close(&os->os_meta_dnode); 1040 if (DMU_USERUSED_DNODE(os)) { 1041 if (DMU_PROJECTUSED_DNODE(os)) 1042 dnode_special_close(&os->os_projectused_dnode); 1043 dnode_special_close(&os->os_userused_dnode); 1044 dnode_special_close(&os->os_groupused_dnode); 1045 } 1046 zil_free(os->os_zil); 1047 1048 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 1049 1050 /* 1051 * This is a barrier to prevent the objset from going away in 1052 * dnode_move() until we can safely ensure that the objset is still in 1053 * use. We consider the objset valid before the barrier and invalid 1054 * after the barrier. 1055 */ 1056 rw_enter(&os_lock, RW_READER); 1057 rw_exit(&os_lock); 1058 1059 kmem_free(os->os_obj_next_percpu, 1060 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1061 1062 mutex_destroy(&os->os_lock); 1063 mutex_destroy(&os->os_userused_lock); 1064 mutex_destroy(&os->os_obj_lock); 1065 mutex_destroy(&os->os_user_ptr_lock); 1066 mutex_destroy(&os->os_upgrade_lock); 1067 for (int i = 0; i < TXG_SIZE; i++) 1068 multilist_destroy(&os->os_dirty_dnodes[i]); 1069 spa_evicting_os_deregister(os->os_spa, os); 1070 kmem_free(os, sizeof (objset_t)); 1071 } 1072 1073 inode_timespec_t 1074 dmu_objset_snap_cmtime(objset_t *os) 1075 { 1076 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1077 } 1078 1079 objset_t * 1080 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1081 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1082 { 1083 objset_t *os; 1084 dnode_t *mdn; 1085 1086 ASSERT(dmu_tx_is_syncing(tx)); 1087 1088 if (blksz == 0) 1089 blksz = DNODE_BLOCK_SIZE; 1090 if (ibs == 0) 1091 ibs = DN_MAX_INDBLKSHIFT; 1092 1093 if (ds != NULL) 1094 VERIFY0(dmu_objset_from_ds(ds, &os)); 1095 else 1096 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1097 1098 mdn = DMU_META_DNODE(os); 1099 1100 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1101 DNODE_MIN_SLOTS, tx); 1102 1103 /* 1104 * We don't want to have to increase the meta-dnode's nlevels 1105 * later, because then we could do it in quiescing context while 1106 * we are also accessing it in open context. 1107 * 1108 * This precaution is not necessary for the MOS (ds == NULL), 1109 * because the MOS is only updated in syncing context. 1110 * This is most fortunate: the MOS is the only objset that 1111 * needs to be synced multiple times as spa_sync() iterates 1112 * to convergence, so minimizing its dn_nlevels matters. 1113 */ 1114 if (ds != NULL) { 1115 if (levels == 0) { 1116 levels = 1; 1117 1118 /* 1119 * Determine the number of levels necessary for the 1120 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1121 * that in order to ensure that we do not overflow 1122 * 64 bits, there has to be a nlevels that gives us a 1123 * number of blocks > DN_MAX_OBJECT but < 2^64. 1124 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1125 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1126 * (16). 1127 */ 1128 while ((uint64_t)mdn->dn_nblkptr << 1129 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1130 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1131 DN_MAX_OBJECT) 1132 levels++; 1133 } 1134 1135 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1136 mdn->dn_nlevels = levels; 1137 } 1138 1139 ASSERT(type != DMU_OST_NONE); 1140 ASSERT(type != DMU_OST_ANY); 1141 ASSERT(type < DMU_OST_NUMTYPES); 1142 os->os_phys->os_type = type; 1143 1144 /* 1145 * Enable user accounting if it is enabled and this is not an 1146 * encrypted receive. 1147 */ 1148 if (dmu_objset_userused_enabled(os) && 1149 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1150 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1151 if (dmu_objset_userobjused_enabled(os)) { 1152 ASSERT3P(ds, !=, NULL); 1153 ds->ds_feature_activation[ 1154 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1155 os->os_phys->os_flags |= 1156 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1157 } 1158 if (dmu_objset_projectquota_enabled(os)) { 1159 ASSERT3P(ds, !=, NULL); 1160 ds->ds_feature_activation[ 1161 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1162 os->os_phys->os_flags |= 1163 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1164 } 1165 os->os_flags = os->os_phys->os_flags; 1166 } 1167 1168 dsl_dataset_dirty(ds, tx); 1169 1170 return (os); 1171 } 1172 1173 /* called from dsl for meta-objset */ 1174 objset_t * 1175 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1176 dmu_objset_type_t type, dmu_tx_t *tx) 1177 { 1178 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1179 } 1180 1181 typedef struct dmu_objset_create_arg { 1182 const char *doca_name; 1183 cred_t *doca_cred; 1184 void (*doca_userfunc)(objset_t *os, void *arg, 1185 cred_t *cr, dmu_tx_t *tx); 1186 void *doca_userarg; 1187 dmu_objset_type_t doca_type; 1188 uint64_t doca_flags; 1189 dsl_crypto_params_t *doca_dcp; 1190 } dmu_objset_create_arg_t; 1191 1192 static int 1193 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1194 { 1195 dmu_objset_create_arg_t *doca = arg; 1196 dsl_pool_t *dp = dmu_tx_pool(tx); 1197 dsl_dir_t *pdd; 1198 dsl_dataset_t *parentds; 1199 objset_t *parentos; 1200 const char *tail; 1201 int error; 1202 1203 if (strchr(doca->doca_name, '@') != NULL) 1204 return (SET_ERROR(EINVAL)); 1205 1206 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1207 return (SET_ERROR(ENAMETOOLONG)); 1208 1209 if (dataset_nestcheck(doca->doca_name) != 0) 1210 return (SET_ERROR(ENAMETOOLONG)); 1211 1212 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1213 if (error != 0) 1214 return (error); 1215 if (tail == NULL) { 1216 dsl_dir_rele(pdd, FTAG); 1217 return (SET_ERROR(EEXIST)); 1218 } 1219 1220 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1221 if (error != 0) { 1222 dsl_dir_rele(pdd, FTAG); 1223 return (error); 1224 } 1225 1226 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1227 doca->doca_cred); 1228 if (error != 0) { 1229 dsl_dir_rele(pdd, FTAG); 1230 return (error); 1231 } 1232 1233 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1234 error = dsl_dataset_hold_obj(pdd->dd_pool, 1235 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1236 if (error != 0) { 1237 dsl_dir_rele(pdd, FTAG); 1238 return (error); 1239 } 1240 error = dmu_objset_from_ds(parentds, &parentos); 1241 if (error != 0) { 1242 dsl_dataset_rele(parentds, FTAG); 1243 dsl_dir_rele(pdd, FTAG); 1244 return (error); 1245 } 1246 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1247 dsl_dataset_rele(parentds, FTAG); 1248 dsl_dir_rele(pdd, FTAG); 1249 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1250 } 1251 dsl_dataset_rele(parentds, FTAG); 1252 dsl_dir_rele(pdd, FTAG); 1253 1254 return (error); 1255 } 1256 1257 static void 1258 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1259 { 1260 dmu_objset_create_arg_t *doca = arg; 1261 dsl_pool_t *dp = dmu_tx_pool(tx); 1262 spa_t *spa = dp->dp_spa; 1263 dsl_dir_t *pdd; 1264 const char *tail; 1265 dsl_dataset_t *ds; 1266 uint64_t obj; 1267 blkptr_t *bp; 1268 objset_t *os; 1269 zio_t *rzio; 1270 1271 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1272 1273 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1274 doca->doca_cred, doca->doca_dcp, tx); 1275 1276 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1277 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1278 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1279 bp = dsl_dataset_get_blkptr(ds); 1280 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1281 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1282 1283 if (doca->doca_userfunc != NULL) { 1284 doca->doca_userfunc(os, doca->doca_userarg, 1285 doca->doca_cred, tx); 1286 } 1287 1288 /* 1289 * The doca_userfunc() may write out some data that needs to be 1290 * encrypted if the dataset is encrypted (specifically the root 1291 * directory). This data must be written out before the encryption 1292 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1293 * I/O to occur immediately by invoking the relevant sections of 1294 * dsl_pool_sync(). 1295 */ 1296 if (os->os_encrypted) { 1297 dsl_dataset_t *tmpds = NULL; 1298 boolean_t need_sync_done = B_FALSE; 1299 1300 mutex_enter(&ds->ds_lock); 1301 ds->ds_owner = FTAG; 1302 mutex_exit(&ds->ds_lock); 1303 1304 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1305 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1306 tx->tx_txg); 1307 if (tmpds != NULL) { 1308 dsl_dataset_sync(ds, rzio, tx); 1309 need_sync_done = B_TRUE; 1310 } 1311 VERIFY0(zio_wait(rzio)); 1312 1313 dmu_objset_sync_done(os, tx); 1314 taskq_wait(dp->dp_sync_taskq); 1315 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1316 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1317 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1318 } 1319 1320 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1321 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1322 tx->tx_txg); 1323 if (tmpds != NULL) { 1324 dmu_buf_rele(ds->ds_dbuf, ds); 1325 dsl_dataset_sync(ds, rzio, tx); 1326 } 1327 VERIFY0(zio_wait(rzio)); 1328 1329 if (need_sync_done) { 1330 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1331 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1332 dsl_dataset_sync_done(ds, tx); 1333 dmu_buf_rele(ds->ds_dbuf, ds); 1334 } 1335 1336 mutex_enter(&ds->ds_lock); 1337 ds->ds_owner = NULL; 1338 mutex_exit(&ds->ds_lock); 1339 } 1340 1341 spa_history_log_internal_ds(ds, "create", tx, " "); 1342 1343 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1344 dsl_dir_rele(pdd, FTAG); 1345 } 1346 1347 int 1348 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1349 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1350 { 1351 dmu_objset_create_arg_t doca; 1352 dsl_crypto_params_t tmp_dcp = { 0 }; 1353 1354 cred_t *cr = CRED(); 1355 crhold(cr); 1356 1357 doca.doca_name = name; 1358 doca.doca_cred = cr; 1359 doca.doca_flags = flags; 1360 doca.doca_userfunc = func; 1361 doca.doca_userarg = arg; 1362 doca.doca_type = type; 1363 1364 /* 1365 * Some callers (mostly for testing) do not provide a dcp on their 1366 * own but various code inside the sync task will require it to be 1367 * allocated. Rather than adding NULL checks throughout this code 1368 * or adding dummy dcp's to all of the callers we simply create a 1369 * dummy one here and use that. This zero dcp will have the same 1370 * effect as asking for inheritance of all encryption params. 1371 */ 1372 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1373 1374 int rv = dsl_sync_task(name, 1375 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1376 6, ZFS_SPACE_CHECK_NORMAL); 1377 1378 if (rv == 0) 1379 zvol_create_minor(name); 1380 1381 crfree(cr); 1382 1383 return (rv); 1384 } 1385 1386 typedef struct dmu_objset_clone_arg { 1387 const char *doca_clone; 1388 const char *doca_origin; 1389 cred_t *doca_cred; 1390 } dmu_objset_clone_arg_t; 1391 1392 static int 1393 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1394 { 1395 dmu_objset_clone_arg_t *doca = arg; 1396 dsl_dir_t *pdd; 1397 const char *tail; 1398 int error; 1399 dsl_dataset_t *origin; 1400 dsl_pool_t *dp = dmu_tx_pool(tx); 1401 1402 if (strchr(doca->doca_clone, '@') != NULL) 1403 return (SET_ERROR(EINVAL)); 1404 1405 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1406 return (SET_ERROR(ENAMETOOLONG)); 1407 1408 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1409 if (error != 0) 1410 return (error); 1411 if (tail == NULL) { 1412 dsl_dir_rele(pdd, FTAG); 1413 return (SET_ERROR(EEXIST)); 1414 } 1415 1416 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1417 doca->doca_cred); 1418 if (error != 0) { 1419 dsl_dir_rele(pdd, FTAG); 1420 return (SET_ERROR(EDQUOT)); 1421 } 1422 1423 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1424 if (error != 0) { 1425 dsl_dir_rele(pdd, FTAG); 1426 return (error); 1427 } 1428 1429 /* You can only clone snapshots, not the head datasets. */ 1430 if (!origin->ds_is_snapshot) { 1431 dsl_dataset_rele(origin, FTAG); 1432 dsl_dir_rele(pdd, FTAG); 1433 return (SET_ERROR(EINVAL)); 1434 } 1435 1436 dsl_dataset_rele(origin, FTAG); 1437 dsl_dir_rele(pdd, FTAG); 1438 1439 return (0); 1440 } 1441 1442 static void 1443 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1444 { 1445 dmu_objset_clone_arg_t *doca = arg; 1446 dsl_pool_t *dp = dmu_tx_pool(tx); 1447 dsl_dir_t *pdd; 1448 const char *tail; 1449 dsl_dataset_t *origin, *ds; 1450 uint64_t obj; 1451 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1452 1453 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1454 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1455 1456 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1457 doca->doca_cred, NULL, tx); 1458 1459 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1460 dsl_dataset_name(origin, namebuf); 1461 spa_history_log_internal_ds(ds, "clone", tx, 1462 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1463 dsl_dataset_rele(ds, FTAG); 1464 dsl_dataset_rele(origin, FTAG); 1465 dsl_dir_rele(pdd, FTAG); 1466 } 1467 1468 int 1469 dmu_objset_clone(const char *clone, const char *origin) 1470 { 1471 dmu_objset_clone_arg_t doca; 1472 1473 cred_t *cr = CRED(); 1474 crhold(cr); 1475 1476 doca.doca_clone = clone; 1477 doca.doca_origin = origin; 1478 doca.doca_cred = cr; 1479 1480 int rv = dsl_sync_task(clone, 1481 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1482 6, ZFS_SPACE_CHECK_NORMAL); 1483 1484 if (rv == 0) 1485 zvol_create_minor(clone); 1486 1487 crfree(cr); 1488 1489 return (rv); 1490 } 1491 1492 int 1493 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1494 { 1495 int err; 1496 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1497 nvlist_t *snaps = fnvlist_alloc(); 1498 1499 fnvlist_add_boolean(snaps, longsnap); 1500 kmem_strfree(longsnap); 1501 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1502 fnvlist_free(snaps); 1503 return (err); 1504 } 1505 1506 static void 1507 dmu_objset_upgrade_task_cb(void *data) 1508 { 1509 objset_t *os = data; 1510 1511 mutex_enter(&os->os_upgrade_lock); 1512 os->os_upgrade_status = EINTR; 1513 if (!os->os_upgrade_exit) { 1514 int status; 1515 1516 mutex_exit(&os->os_upgrade_lock); 1517 1518 status = os->os_upgrade_cb(os); 1519 1520 mutex_enter(&os->os_upgrade_lock); 1521 1522 os->os_upgrade_status = status; 1523 } 1524 os->os_upgrade_exit = B_TRUE; 1525 os->os_upgrade_id = 0; 1526 mutex_exit(&os->os_upgrade_lock); 1527 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1528 } 1529 1530 static void 1531 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1532 { 1533 if (os->os_upgrade_id != 0) 1534 return; 1535 1536 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1537 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1538 1539 mutex_enter(&os->os_upgrade_lock); 1540 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1541 os->os_upgrade_exit = B_FALSE; 1542 os->os_upgrade_cb = cb; 1543 os->os_upgrade_id = taskq_dispatch( 1544 os->os_spa->spa_upgrade_taskq, 1545 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1546 if (os->os_upgrade_id == TASKQID_INVALID) { 1547 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1548 os->os_upgrade_status = ENOMEM; 1549 } 1550 } else { 1551 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1552 } 1553 mutex_exit(&os->os_upgrade_lock); 1554 } 1555 1556 static void 1557 dmu_objset_upgrade_stop(objset_t *os) 1558 { 1559 mutex_enter(&os->os_upgrade_lock); 1560 os->os_upgrade_exit = B_TRUE; 1561 if (os->os_upgrade_id != 0) { 1562 taskqid_t id = os->os_upgrade_id; 1563 1564 os->os_upgrade_id = 0; 1565 mutex_exit(&os->os_upgrade_lock); 1566 1567 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1568 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1569 } 1570 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1571 } else { 1572 mutex_exit(&os->os_upgrade_lock); 1573 } 1574 } 1575 1576 static void 1577 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1578 { 1579 dnode_t *dn; 1580 1581 while ((dn = multilist_sublist_head(list)) != NULL) { 1582 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1583 ASSERT(dn->dn_dbuf->db_data_pending); 1584 /* 1585 * Initialize dn_zio outside dnode_sync() because the 1586 * meta-dnode needs to set it outside dnode_sync(). 1587 */ 1588 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1589 ASSERT(dn->dn_zio); 1590 1591 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1592 multilist_sublist_remove(list, dn); 1593 1594 /* 1595 * See the comment above dnode_rele_task() for an explanation 1596 * of why this dnode hold is always needed (even when not 1597 * doing user accounting). 1598 */ 1599 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1600 (void) dnode_add_ref(dn, newlist); 1601 multilist_insert(newlist, dn); 1602 1603 dnode_sync(dn, tx); 1604 } 1605 } 1606 1607 static void 1608 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1609 { 1610 (void) abuf; 1611 blkptr_t *bp = zio->io_bp; 1612 objset_t *os = arg; 1613 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1614 uint64_t fill = 0; 1615 1616 ASSERT(!BP_IS_EMBEDDED(bp)); 1617 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1618 ASSERT0(BP_GET_LEVEL(bp)); 1619 1620 /* 1621 * Update rootbp fill count: it should be the number of objects 1622 * allocated in the object set (not counting the "special" 1623 * objects that are stored in the objset_phys_t -- the meta 1624 * dnode and user/group/project accounting objects). 1625 */ 1626 for (int i = 0; i < dnp->dn_nblkptr; i++) 1627 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1628 1629 BP_SET_FILL(bp, fill); 1630 1631 if (os->os_dsl_dataset != NULL) 1632 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1633 *os->os_rootbp = *bp; 1634 if (os->os_dsl_dataset != NULL) 1635 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1636 } 1637 1638 static void 1639 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1640 { 1641 (void) abuf; 1642 blkptr_t *bp = zio->io_bp; 1643 blkptr_t *bp_orig = &zio->io_bp_orig; 1644 objset_t *os = arg; 1645 1646 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1647 ASSERT(BP_EQUAL(bp, bp_orig)); 1648 } else { 1649 dsl_dataset_t *ds = os->os_dsl_dataset; 1650 dmu_tx_t *tx = os->os_synctx; 1651 1652 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1653 dsl_dataset_block_born(ds, bp, tx); 1654 } 1655 kmem_free(bp, sizeof (*bp)); 1656 } 1657 1658 typedef struct sync_objset_arg { 1659 zio_t *soa_zio; 1660 objset_t *soa_os; 1661 dmu_tx_t *soa_tx; 1662 kmutex_t soa_mutex; 1663 int soa_count; 1664 taskq_ent_t soa_tq_ent; 1665 } sync_objset_arg_t; 1666 1667 typedef struct sync_dnodes_arg { 1668 multilist_t *sda_list; 1669 int sda_sublist_idx; 1670 multilist_t *sda_newlist; 1671 sync_objset_arg_t *sda_soa; 1672 } sync_dnodes_arg_t; 1673 1674 static void sync_meta_dnode_task(void *arg); 1675 1676 static void 1677 sync_dnodes_task(void *arg) 1678 { 1679 sync_dnodes_arg_t *sda = arg; 1680 sync_objset_arg_t *soa = sda->sda_soa; 1681 objset_t *os = soa->soa_os; 1682 1683 uint_t allocator = spa_acq_allocator(os->os_spa); 1684 multilist_sublist_t *ms = 1685 multilist_sublist_lock_idx(sda->sda_list, sda->sda_sublist_idx); 1686 1687 dmu_objset_sync_dnodes(ms, soa->soa_tx); 1688 1689 multilist_sublist_unlock(ms); 1690 spa_rel_allocator(os->os_spa, allocator); 1691 1692 kmem_free(sda, sizeof (*sda)); 1693 1694 mutex_enter(&soa->soa_mutex); 1695 ASSERT(soa->soa_count != 0); 1696 if (--soa->soa_count != 0) { 1697 mutex_exit(&soa->soa_mutex); 1698 return; 1699 } 1700 mutex_exit(&soa->soa_mutex); 1701 1702 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1703 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1704 } 1705 1706 /* 1707 * Issue the zio_nowait() for all dirty record zios on the meta dnode, 1708 * then trigger the callback for the zil_sync. This runs once for each 1709 * objset, only after any/all sublists in the objset have been synced. 1710 */ 1711 static void 1712 sync_meta_dnode_task(void *arg) 1713 { 1714 sync_objset_arg_t *soa = arg; 1715 objset_t *os = soa->soa_os; 1716 dmu_tx_t *tx = soa->soa_tx; 1717 int txgoff = tx->tx_txg & TXG_MASK; 1718 dbuf_dirty_record_t *dr; 1719 1720 ASSERT0(soa->soa_count); 1721 1722 list_t *list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1723 while ((dr = list_remove_head(list)) != NULL) { 1724 ASSERT0(dr->dr_dbuf->db_level); 1725 zio_nowait(dr->dr_zio); 1726 } 1727 1728 /* Enable dnode backfill if enough objects have been freed. */ 1729 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1730 os->os_rescan_dnodes = B_TRUE; 1731 os->os_freed_dnodes = 0; 1732 } 1733 1734 /* 1735 * Free intent log blocks up to this tx. 1736 */ 1737 zil_sync(os->os_zil, tx); 1738 os->os_phys->os_zil_header = os->os_zil_header; 1739 zio_nowait(soa->soa_zio); 1740 1741 mutex_destroy(&soa->soa_mutex); 1742 kmem_free(soa, sizeof (*soa)); 1743 } 1744 1745 /* called from dsl */ 1746 void 1747 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1748 { 1749 int txgoff; 1750 zbookmark_phys_t zb; 1751 zio_prop_t zp; 1752 zio_t *zio; 1753 int num_sublists; 1754 multilist_t *ml; 1755 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1756 *blkptr_copy = *os->os_rootbp; 1757 1758 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1759 1760 ASSERT(dmu_tx_is_syncing(tx)); 1761 /* XXX the write_done callback should really give us the tx... */ 1762 os->os_synctx = tx; 1763 1764 if (os->os_dsl_dataset == NULL) { 1765 /* 1766 * This is the MOS. If we have upgraded, 1767 * spa_max_replication() could change, so reset 1768 * os_copies here. 1769 */ 1770 os->os_copies = spa_max_replication(os->os_spa); 1771 } 1772 1773 /* 1774 * Create the root block IO 1775 */ 1776 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1777 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1778 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1779 arc_release(os->os_phys_buf, &os->os_phys_buf); 1780 1781 dmu_write_policy(os, NULL, 0, 0, &zp); 1782 1783 /* 1784 * If we are either claiming the ZIL or doing a raw receive, write 1785 * out the os_phys_buf raw. Neither of these actions will effect the 1786 * MAC at this point. 1787 */ 1788 if (os->os_raw_receive || 1789 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1790 ASSERT(os->os_encrypted); 1791 arc_convert_to_raw(os->os_phys_buf, 1792 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1793 DMU_OT_OBJSET, NULL, NULL, NULL); 1794 } 1795 1796 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1797 blkptr_copy, os->os_phys_buf, B_FALSE, dmu_os_is_l2cacheable(os), 1798 &zp, dmu_objset_write_ready, NULL, dmu_objset_write_done, 1799 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1800 1801 /* 1802 * Sync special dnodes - the parent IO for the sync is the root block 1803 */ 1804 DMU_META_DNODE(os)->dn_zio = zio; 1805 dnode_sync(DMU_META_DNODE(os), tx); 1806 1807 os->os_phys->os_flags = os->os_flags; 1808 1809 if (DMU_USERUSED_DNODE(os) && 1810 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1811 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1812 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1813 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1814 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1815 } 1816 1817 if (DMU_PROJECTUSED_DNODE(os) && 1818 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1819 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1820 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1821 } 1822 1823 txgoff = tx->tx_txg & TXG_MASK; 1824 1825 /* 1826 * We must create the list here because it uses the 1827 * dn_dirty_link[] of this txg. But it may already 1828 * exist because we call dsl_dataset_sync() twice per txg. 1829 */ 1830 if (os->os_synced_dnodes.ml_sublists == NULL) { 1831 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1832 offsetof(dnode_t, dn_dirty_link[txgoff]), 1833 dnode_multilist_index_func); 1834 } else { 1835 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1836 offsetof(dnode_t, dn_dirty_link[txgoff])); 1837 } 1838 1839 /* 1840 * zio_nowait(zio) is done after any/all sublist and meta dnode 1841 * zios have been nowaited, and the zil_sync() has been performed. 1842 * The soa is freed at the end of sync_meta_dnode_task. 1843 */ 1844 sync_objset_arg_t *soa = kmem_alloc(sizeof (*soa), KM_SLEEP); 1845 soa->soa_zio = zio; 1846 soa->soa_os = os; 1847 soa->soa_tx = tx; 1848 taskq_init_ent(&soa->soa_tq_ent); 1849 mutex_init(&soa->soa_mutex, NULL, MUTEX_DEFAULT, NULL); 1850 1851 ml = &os->os_dirty_dnodes[txgoff]; 1852 soa->soa_count = num_sublists = multilist_get_num_sublists(ml); 1853 1854 for (int i = 0; i < num_sublists; i++) { 1855 if (multilist_sublist_is_empty_idx(ml, i)) 1856 soa->soa_count--; 1857 } 1858 1859 if (soa->soa_count == 0) { 1860 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1861 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1862 } else { 1863 /* 1864 * Sync sublists in parallel. The last to finish 1865 * (i.e., when soa->soa_count reaches zero) must 1866 * dispatch sync_meta_dnode_task. 1867 */ 1868 for (int i = 0; i < num_sublists; i++) { 1869 if (multilist_sublist_is_empty_idx(ml, i)) 1870 continue; 1871 sync_dnodes_arg_t *sda = 1872 kmem_alloc(sizeof (*sda), KM_SLEEP); 1873 sda->sda_list = ml; 1874 sda->sda_sublist_idx = i; 1875 sda->sda_soa = soa; 1876 (void) taskq_dispatch( 1877 dmu_objset_pool(os)->dp_sync_taskq, 1878 sync_dnodes_task, sda, 0); 1879 /* sync_dnodes_task frees sda */ 1880 } 1881 } 1882 } 1883 1884 boolean_t 1885 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1886 { 1887 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1888 } 1889 1890 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1891 1892 void 1893 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1894 { 1895 file_cbs[ost] = cb; 1896 } 1897 1898 int 1899 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1900 zfs_file_info_t *zfi) 1901 { 1902 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1903 if (cb == NULL) 1904 return (EINVAL); 1905 return (cb(bonustype, data, zfi)); 1906 } 1907 1908 boolean_t 1909 dmu_objset_userused_enabled(objset_t *os) 1910 { 1911 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1912 file_cbs[os->os_phys->os_type] != NULL && 1913 DMU_USERUSED_DNODE(os) != NULL); 1914 } 1915 1916 boolean_t 1917 dmu_objset_userobjused_enabled(objset_t *os) 1918 { 1919 return (dmu_objset_userused_enabled(os) && 1920 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1921 } 1922 1923 boolean_t 1924 dmu_objset_projectquota_enabled(objset_t *os) 1925 { 1926 return (file_cbs[os->os_phys->os_type] != NULL && 1927 DMU_PROJECTUSED_DNODE(os) != NULL && 1928 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1929 } 1930 1931 typedef struct userquota_node { 1932 /* must be in the first filed, see userquota_update_cache() */ 1933 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1934 int64_t uqn_delta; 1935 avl_node_t uqn_node; 1936 } userquota_node_t; 1937 1938 typedef struct userquota_cache { 1939 avl_tree_t uqc_user_deltas; 1940 avl_tree_t uqc_group_deltas; 1941 avl_tree_t uqc_project_deltas; 1942 } userquota_cache_t; 1943 1944 static int 1945 userquota_compare(const void *l, const void *r) 1946 { 1947 const userquota_node_t *luqn = l; 1948 const userquota_node_t *ruqn = r; 1949 int rv; 1950 1951 /* 1952 * NB: can only access uqn_id because userquota_update_cache() doesn't 1953 * pass in an entire userquota_node_t. 1954 */ 1955 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1956 1957 return (TREE_ISIGN(rv)); 1958 } 1959 1960 static void 1961 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1962 { 1963 void *cookie; 1964 userquota_node_t *uqn; 1965 1966 ASSERT(dmu_tx_is_syncing(tx)); 1967 1968 cookie = NULL; 1969 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1970 &cookie)) != NULL) { 1971 /* 1972 * os_userused_lock protects against concurrent calls to 1973 * zap_increment_int(). It's needed because zap_increment_int() 1974 * is not thread-safe (i.e. not atomic). 1975 */ 1976 mutex_enter(&os->os_userused_lock); 1977 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1978 uqn->uqn_id, uqn->uqn_delta, tx)); 1979 mutex_exit(&os->os_userused_lock); 1980 kmem_free(uqn, sizeof (*uqn)); 1981 } 1982 avl_destroy(&cache->uqc_user_deltas); 1983 1984 cookie = NULL; 1985 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1986 &cookie)) != NULL) { 1987 mutex_enter(&os->os_userused_lock); 1988 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1989 uqn->uqn_id, uqn->uqn_delta, tx)); 1990 mutex_exit(&os->os_userused_lock); 1991 kmem_free(uqn, sizeof (*uqn)); 1992 } 1993 avl_destroy(&cache->uqc_group_deltas); 1994 1995 if (dmu_objset_projectquota_enabled(os)) { 1996 cookie = NULL; 1997 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1998 &cookie)) != NULL) { 1999 mutex_enter(&os->os_userused_lock); 2000 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 2001 uqn->uqn_id, uqn->uqn_delta, tx)); 2002 mutex_exit(&os->os_userused_lock); 2003 kmem_free(uqn, sizeof (*uqn)); 2004 } 2005 avl_destroy(&cache->uqc_project_deltas); 2006 } 2007 } 2008 2009 static void 2010 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 2011 { 2012 userquota_node_t *uqn; 2013 avl_index_t idx; 2014 2015 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 2016 /* 2017 * Use id directly for searching because uqn_id is the first field of 2018 * userquota_node_t and fields after uqn_id won't be accessed in 2019 * avl_find(). 2020 */ 2021 uqn = avl_find(avl, (const void *)id, &idx); 2022 if (uqn == NULL) { 2023 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 2024 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 2025 avl_insert(avl, uqn, idx); 2026 } 2027 uqn->uqn_delta += delta; 2028 } 2029 2030 static void 2031 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 2032 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 2033 boolean_t subtract) 2034 { 2035 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 2036 int64_t delta = DNODE_MIN_SIZE + used; 2037 char name[20]; 2038 2039 if (subtract) 2040 delta = -delta; 2041 2042 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 2043 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 2044 2045 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 2046 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 2047 2048 if (dmu_objset_projectquota_enabled(os)) { 2049 (void) snprintf(name, sizeof (name), "%llx", 2050 (longlong_t)project); 2051 userquota_update_cache(&cache->uqc_project_deltas, 2052 name, delta); 2053 } 2054 } 2055 } 2056 2057 static void 2058 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 2059 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 2060 { 2061 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 2062 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 2063 int delta = subtract ? -1 : 1; 2064 2065 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 2066 (longlong_t)user); 2067 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 2068 2069 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 2070 (longlong_t)group); 2071 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 2072 2073 if (dmu_objset_projectquota_enabled(os)) { 2074 (void) snprintf(name, sizeof (name), 2075 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 2076 userquota_update_cache(&cache->uqc_project_deltas, 2077 name, delta); 2078 } 2079 } 2080 } 2081 2082 typedef struct userquota_updates_arg { 2083 objset_t *uua_os; 2084 int uua_sublist_idx; 2085 dmu_tx_t *uua_tx; 2086 } userquota_updates_arg_t; 2087 2088 static void 2089 userquota_updates_task(void *arg) 2090 { 2091 userquota_updates_arg_t *uua = arg; 2092 objset_t *os = uua->uua_os; 2093 dmu_tx_t *tx = uua->uua_tx; 2094 dnode_t *dn; 2095 userquota_cache_t cache = { { 0 } }; 2096 2097 multilist_sublist_t *list = multilist_sublist_lock_idx( 2098 &os->os_synced_dnodes, uua->uua_sublist_idx); 2099 2100 ASSERT(multilist_sublist_head(list) == NULL || 2101 dmu_objset_userused_enabled(os)); 2102 avl_create(&cache.uqc_user_deltas, userquota_compare, 2103 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2104 avl_create(&cache.uqc_group_deltas, userquota_compare, 2105 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2106 if (dmu_objset_projectquota_enabled(os)) 2107 avl_create(&cache.uqc_project_deltas, userquota_compare, 2108 sizeof (userquota_node_t), offsetof(userquota_node_t, 2109 uqn_node)); 2110 2111 while ((dn = multilist_sublist_head(list)) != NULL) { 2112 int flags; 2113 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2114 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2115 dn->dn_phys->dn_flags & 2116 DNODE_FLAG_USERUSED_ACCOUNTED); 2117 2118 flags = dn->dn_id_flags; 2119 ASSERT(flags); 2120 if (flags & DN_ID_OLD_EXIST) { 2121 do_userquota_update(os, &cache, dn->dn_oldused, 2122 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2123 dn->dn_oldprojid, B_TRUE); 2124 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2125 dn->dn_olduid, dn->dn_oldgid, 2126 dn->dn_oldprojid, B_TRUE); 2127 } 2128 if (flags & DN_ID_NEW_EXIST) { 2129 do_userquota_update(os, &cache, 2130 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2131 dn->dn_newuid, dn->dn_newgid, 2132 dn->dn_newprojid, B_FALSE); 2133 do_userobjquota_update(os, &cache, 2134 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2135 dn->dn_newprojid, B_FALSE); 2136 } 2137 2138 mutex_enter(&dn->dn_mtx); 2139 dn->dn_oldused = 0; 2140 dn->dn_oldflags = 0; 2141 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2142 dn->dn_olduid = dn->dn_newuid; 2143 dn->dn_oldgid = dn->dn_newgid; 2144 dn->dn_oldprojid = dn->dn_newprojid; 2145 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2146 if (dn->dn_bonuslen == 0) 2147 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2148 else 2149 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2150 } 2151 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2152 mutex_exit(&dn->dn_mtx); 2153 2154 multilist_sublist_remove(list, dn); 2155 dnode_rele(dn, &os->os_synced_dnodes); 2156 } 2157 do_userquota_cacheflush(os, &cache, tx); 2158 multilist_sublist_unlock(list); 2159 kmem_free(uua, sizeof (*uua)); 2160 } 2161 2162 /* 2163 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2164 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2165 * evicted because the block containing the dnode can't be evicted until it is 2166 * written out. However, this hold is necessary to prevent the dnode_t from 2167 * being moved (via dnode_move()) while it's still referenced by 2168 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2169 * dirty_lightweight_leaf-type dirty records. 2170 * 2171 * If we are doing user-object accounting, the dnode_rele() happens from 2172 * userquota_updates_task() instead. 2173 */ 2174 static void 2175 dnode_rele_task(void *arg) 2176 { 2177 userquota_updates_arg_t *uua = arg; 2178 objset_t *os = uua->uua_os; 2179 2180 multilist_sublist_t *list = multilist_sublist_lock_idx( 2181 &os->os_synced_dnodes, uua->uua_sublist_idx); 2182 2183 dnode_t *dn; 2184 while ((dn = multilist_sublist_head(list)) != NULL) { 2185 multilist_sublist_remove(list, dn); 2186 dnode_rele(dn, &os->os_synced_dnodes); 2187 } 2188 multilist_sublist_unlock(list); 2189 kmem_free(uua, sizeof (*uua)); 2190 } 2191 2192 /* 2193 * Return TRUE if userquota updates are needed. 2194 */ 2195 static boolean_t 2196 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2197 { 2198 if (!dmu_objset_userused_enabled(os)) 2199 return (B_FALSE); 2200 2201 /* 2202 * If this is a raw receive just return and handle accounting 2203 * later when we have the keys loaded. We also don't do user 2204 * accounting during claiming since the datasets are not owned 2205 * for the duration of claiming and this txg should only be 2206 * used for recovery. 2207 */ 2208 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2209 return (B_FALSE); 2210 2211 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2212 return (B_FALSE); 2213 2214 /* Allocate the user/group/project used objects if necessary. */ 2215 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2216 VERIFY0(zap_create_claim(os, 2217 DMU_USERUSED_OBJECT, 2218 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2219 VERIFY0(zap_create_claim(os, 2220 DMU_GROUPUSED_OBJECT, 2221 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2222 } 2223 2224 if (dmu_objset_projectquota_enabled(os) && 2225 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2226 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2227 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2228 } 2229 return (B_TRUE); 2230 } 2231 2232 /* 2233 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2234 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2235 * The caller must taskq_wait(dp_sync_taskq). 2236 */ 2237 void 2238 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2239 { 2240 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2241 2242 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2243 for (int i = 0; i < num_sublists; i++) { 2244 userquota_updates_arg_t *uua = 2245 kmem_alloc(sizeof (*uua), KM_SLEEP); 2246 uua->uua_os = os; 2247 uua->uua_sublist_idx = i; 2248 uua->uua_tx = tx; 2249 2250 /* 2251 * If we don't need to update userquotas, use 2252 * dnode_rele_task() to call dnode_rele() 2253 */ 2254 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2255 need_userquota ? userquota_updates_task : dnode_rele_task, 2256 uua, 0); 2257 /* callback frees uua */ 2258 } 2259 } 2260 2261 2262 /* 2263 * Returns a pointer to data to find uid/gid from 2264 * 2265 * If a dirty record for transaction group that is syncing can't 2266 * be found then NULL is returned. In the NULL case it is assumed 2267 * the uid/gid aren't changing. 2268 */ 2269 static void * 2270 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2271 { 2272 dbuf_dirty_record_t *dr; 2273 void *data; 2274 2275 if (db->db_dirtycnt == 0) { 2276 ASSERT(MUTEX_HELD(&db->db_mtx)); 2277 return (db->db.db_data); /* Nothing is changing */ 2278 } 2279 2280 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2281 2282 if (dr == NULL) { 2283 data = NULL; 2284 } else { 2285 if (dr->dr_dnode->dn_bonuslen == 0 && 2286 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2287 data = dr->dt.dl.dr_data->b_data; 2288 else 2289 data = dr->dt.dl.dr_data; 2290 } 2291 2292 return (data); 2293 } 2294 2295 void 2296 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2297 { 2298 objset_t *os = dn->dn_objset; 2299 void *data = NULL; 2300 dmu_buf_impl_t *db = NULL; 2301 int flags = dn->dn_id_flags; 2302 int error; 2303 boolean_t have_spill = B_FALSE; 2304 2305 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2306 return; 2307 2308 /* 2309 * Raw receives introduce a problem with user accounting. Raw 2310 * receives cannot update the user accounting info because the 2311 * user ids and the sizes are encrypted. To guarantee that we 2312 * never end up with bad user accounting, we simply disable it 2313 * during raw receives. We also disable this for normal receives 2314 * so that an incremental raw receive may be done on top of an 2315 * existing non-raw receive. 2316 */ 2317 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2318 return; 2319 2320 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2321 DN_ID_CHKED_SPILL))) 2322 return; 2323 2324 if (before && dn->dn_bonuslen != 0) 2325 data = DN_BONUS(dn->dn_phys); 2326 else if (!before && dn->dn_bonuslen != 0) { 2327 if (dn->dn_bonus) { 2328 db = dn->dn_bonus; 2329 mutex_enter(&db->db_mtx); 2330 data = dmu_objset_userquota_find_data(db, tx); 2331 } else { 2332 data = DN_BONUS(dn->dn_phys); 2333 } 2334 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2335 dmu_flags_t rf = DB_RF_MUST_SUCCEED; 2336 2337 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2338 rf |= DB_RF_HAVESTRUCT; 2339 error = dmu_spill_hold_by_dnode(dn, rf, 2340 FTAG, (dmu_buf_t **)&db); 2341 ASSERT(error == 0); 2342 mutex_enter(&db->db_mtx); 2343 data = (before) ? db->db.db_data : 2344 dmu_objset_userquota_find_data(db, tx); 2345 have_spill = B_TRUE; 2346 } else { 2347 mutex_enter(&dn->dn_mtx); 2348 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2349 mutex_exit(&dn->dn_mtx); 2350 return; 2351 } 2352 2353 /* 2354 * Must always call the callback in case the object 2355 * type has changed and that type isn't an object type to track 2356 */ 2357 zfs_file_info_t zfi; 2358 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2359 2360 if (before) { 2361 ASSERT(data); 2362 dn->dn_olduid = zfi.zfi_user; 2363 dn->dn_oldgid = zfi.zfi_group; 2364 dn->dn_oldprojid = zfi.zfi_project; 2365 } else if (data) { 2366 dn->dn_newuid = zfi.zfi_user; 2367 dn->dn_newgid = zfi.zfi_group; 2368 dn->dn_newprojid = zfi.zfi_project; 2369 } 2370 2371 /* 2372 * Preserve existing uid/gid when the callback can't determine 2373 * what the new uid/gid are and the callback returned EEXIST. 2374 * The EEXIST error tells us to just use the existing uid/gid. 2375 * If we don't know what the old values are then just assign 2376 * them to 0, since that is a new file being created. 2377 */ 2378 if (!before && data == NULL && error == EEXIST) { 2379 if (flags & DN_ID_OLD_EXIST) { 2380 dn->dn_newuid = dn->dn_olduid; 2381 dn->dn_newgid = dn->dn_oldgid; 2382 dn->dn_newprojid = dn->dn_oldprojid; 2383 } else { 2384 dn->dn_newuid = 0; 2385 dn->dn_newgid = 0; 2386 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2387 } 2388 error = 0; 2389 } 2390 2391 if (db) 2392 mutex_exit(&db->db_mtx); 2393 2394 mutex_enter(&dn->dn_mtx); 2395 if (error == 0 && before) 2396 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2397 if (error == 0 && !before) 2398 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2399 2400 if (have_spill) { 2401 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2402 } else { 2403 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2404 } 2405 mutex_exit(&dn->dn_mtx); 2406 if (have_spill) 2407 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2408 } 2409 2410 boolean_t 2411 dmu_objset_userspace_present(objset_t *os) 2412 { 2413 return (os->os_phys->os_flags & 2414 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2415 } 2416 2417 boolean_t 2418 dmu_objset_userobjspace_present(objset_t *os) 2419 { 2420 return (os->os_phys->os_flags & 2421 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2422 } 2423 2424 boolean_t 2425 dmu_objset_projectquota_present(objset_t *os) 2426 { 2427 return (os->os_phys->os_flags & 2428 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2429 } 2430 2431 static int 2432 dmu_objset_space_upgrade(objset_t *os) 2433 { 2434 uint64_t obj; 2435 int err = 0; 2436 2437 /* 2438 * We simply need to mark every object dirty, so that it will be 2439 * synced out and now accounted. If this is called 2440 * concurrently, or if we already did some work before crashing, 2441 * that's fine, since we track each object's accounted state 2442 * independently. 2443 */ 2444 2445 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2446 dmu_tx_t *tx; 2447 dmu_buf_t *db; 2448 int objerr; 2449 2450 mutex_enter(&os->os_upgrade_lock); 2451 if (os->os_upgrade_exit) 2452 err = SET_ERROR(EINTR); 2453 mutex_exit(&os->os_upgrade_lock); 2454 if (err != 0) 2455 return (err); 2456 2457 if (issig()) 2458 return (SET_ERROR(EINTR)); 2459 2460 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2461 if (objerr != 0) 2462 continue; 2463 tx = dmu_tx_create(os); 2464 dmu_tx_hold_bonus(tx, obj); 2465 objerr = dmu_tx_assign(tx, DMU_TX_WAIT); 2466 if (objerr != 0) { 2467 dmu_buf_rele(db, FTAG); 2468 dmu_tx_abort(tx); 2469 continue; 2470 } 2471 dmu_buf_will_dirty(db, tx); 2472 dmu_buf_rele(db, FTAG); 2473 dmu_tx_commit(tx); 2474 } 2475 return (0); 2476 } 2477 2478 static int 2479 dmu_objset_userspace_upgrade_cb(objset_t *os) 2480 { 2481 int err = 0; 2482 2483 if (dmu_objset_userspace_present(os)) 2484 return (0); 2485 if (dmu_objset_is_snapshot(os)) 2486 return (SET_ERROR(EINVAL)); 2487 if (!dmu_objset_userused_enabled(os)) 2488 return (SET_ERROR(ENOTSUP)); 2489 2490 err = dmu_objset_space_upgrade(os); 2491 if (err) 2492 return (err); 2493 2494 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2495 txg_wait_synced(dmu_objset_pool(os), 0); 2496 return (0); 2497 } 2498 2499 void 2500 dmu_objset_userspace_upgrade(objset_t *os) 2501 { 2502 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2503 } 2504 2505 static int 2506 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2507 { 2508 int err = 0; 2509 2510 if (dmu_objset_userobjspace_present(os) && 2511 dmu_objset_projectquota_present(os)) 2512 return (0); 2513 if (dmu_objset_is_snapshot(os)) 2514 return (SET_ERROR(EINVAL)); 2515 if (!dmu_objset_userused_enabled(os)) 2516 return (SET_ERROR(ENOTSUP)); 2517 if (!dmu_objset_projectquota_enabled(os) && 2518 dmu_objset_userobjspace_present(os)) 2519 return (SET_ERROR(ENOTSUP)); 2520 2521 if (dmu_objset_userobjused_enabled(os)) 2522 dmu_objset_ds(os)->ds_feature_activation[ 2523 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2524 if (dmu_objset_projectquota_enabled(os)) 2525 dmu_objset_ds(os)->ds_feature_activation[ 2526 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2527 2528 err = dmu_objset_space_upgrade(os); 2529 if (err) 2530 return (err); 2531 2532 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2533 if (dmu_objset_userobjused_enabled(os)) 2534 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2535 if (dmu_objset_projectquota_enabled(os)) 2536 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2537 2538 txg_wait_synced(dmu_objset_pool(os), 0); 2539 return (0); 2540 } 2541 2542 void 2543 dmu_objset_id_quota_upgrade(objset_t *os) 2544 { 2545 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2546 } 2547 2548 boolean_t 2549 dmu_objset_userobjspace_upgradable(objset_t *os) 2550 { 2551 return (dmu_objset_type(os) == DMU_OST_ZFS && 2552 !dmu_objset_is_snapshot(os) && 2553 dmu_objset_userobjused_enabled(os) && 2554 !dmu_objset_userobjspace_present(os) && 2555 spa_writeable(dmu_objset_spa(os))); 2556 } 2557 2558 boolean_t 2559 dmu_objset_projectquota_upgradable(objset_t *os) 2560 { 2561 return (dmu_objset_type(os) == DMU_OST_ZFS && 2562 !dmu_objset_is_snapshot(os) && 2563 dmu_objset_projectquota_enabled(os) && 2564 !dmu_objset_projectquota_present(os) && 2565 spa_writeable(dmu_objset_spa(os))); 2566 } 2567 2568 void 2569 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2570 uint64_t *usedobjsp, uint64_t *availobjsp) 2571 { 2572 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2573 usedobjsp, availobjsp); 2574 } 2575 2576 uint64_t 2577 dmu_objset_fsid_guid(objset_t *os) 2578 { 2579 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2580 } 2581 2582 void 2583 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2584 { 2585 stat->dds_type = os->os_phys->os_type; 2586 if (os->os_dsl_dataset) 2587 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2588 } 2589 2590 void 2591 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2592 { 2593 ASSERT(os->os_dsl_dataset || 2594 os->os_phys->os_type == DMU_OST_META); 2595 2596 if (os->os_dsl_dataset != NULL) 2597 dsl_dataset_stats(os->os_dsl_dataset, nv); 2598 2599 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2600 os->os_phys->os_type); 2601 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2602 dmu_objset_userspace_present(os)); 2603 } 2604 2605 int 2606 dmu_objset_is_snapshot(objset_t *os) 2607 { 2608 if (os->os_dsl_dataset != NULL) 2609 return (os->os_dsl_dataset->ds_is_snapshot); 2610 else 2611 return (B_FALSE); 2612 } 2613 2614 int 2615 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2616 boolean_t *conflict) 2617 { 2618 dsl_dataset_t *ds = os->os_dsl_dataset; 2619 uint64_t ignored; 2620 2621 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2622 return (SET_ERROR(ENOENT)); 2623 2624 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2625 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2626 MT_NORMALIZE, real, maxlen, conflict)); 2627 } 2628 2629 int 2630 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2631 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2632 { 2633 dsl_dataset_t *ds = os->os_dsl_dataset; 2634 zap_cursor_t cursor; 2635 zap_attribute_t *attr; 2636 2637 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2638 2639 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2640 return (SET_ERROR(ENOENT)); 2641 2642 attr = zap_attribute_alloc(); 2643 zap_cursor_init_serialized(&cursor, 2644 ds->ds_dir->dd_pool->dp_meta_objset, 2645 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2646 2647 if (zap_cursor_retrieve(&cursor, attr) != 0) { 2648 zap_cursor_fini(&cursor); 2649 zap_attribute_free(attr); 2650 return (SET_ERROR(ENOENT)); 2651 } 2652 2653 if (strlen(attr->za_name) + 1 > namelen) { 2654 zap_cursor_fini(&cursor); 2655 zap_attribute_free(attr); 2656 return (SET_ERROR(ENAMETOOLONG)); 2657 } 2658 2659 (void) strlcpy(name, attr->za_name, namelen); 2660 if (idp) 2661 *idp = attr->za_first_integer; 2662 if (case_conflict) 2663 *case_conflict = attr->za_normalization_conflict; 2664 zap_cursor_advance(&cursor); 2665 *offp = zap_cursor_serialize(&cursor); 2666 zap_cursor_fini(&cursor); 2667 zap_attribute_free(attr); 2668 2669 return (0); 2670 } 2671 2672 int 2673 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2674 { 2675 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2676 } 2677 2678 int 2679 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2680 uint64_t *idp, uint64_t *offp) 2681 { 2682 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2683 zap_cursor_t cursor; 2684 zap_attribute_t *attr; 2685 2686 /* there is no next dir on a snapshot! */ 2687 if (os->os_dsl_dataset->ds_object != 2688 dsl_dir_phys(dd)->dd_head_dataset_obj) 2689 return (SET_ERROR(ENOENT)); 2690 2691 attr = zap_attribute_alloc(); 2692 zap_cursor_init_serialized(&cursor, 2693 dd->dd_pool->dp_meta_objset, 2694 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2695 2696 if (zap_cursor_retrieve(&cursor, attr) != 0) { 2697 zap_cursor_fini(&cursor); 2698 zap_attribute_free(attr); 2699 return (SET_ERROR(ENOENT)); 2700 } 2701 2702 if (strlen(attr->za_name) + 1 > namelen) { 2703 zap_cursor_fini(&cursor); 2704 zap_attribute_free(attr); 2705 return (SET_ERROR(ENAMETOOLONG)); 2706 } 2707 2708 (void) strlcpy(name, attr->za_name, namelen); 2709 if (idp) 2710 *idp = attr->za_first_integer; 2711 zap_cursor_advance(&cursor); 2712 *offp = zap_cursor_serialize(&cursor); 2713 zap_cursor_fini(&cursor); 2714 zap_attribute_free(attr); 2715 2716 return (0); 2717 } 2718 2719 typedef struct dmu_objset_find_ctx { 2720 taskq_t *dc_tq; 2721 dsl_pool_t *dc_dp; 2722 uint64_t dc_ddobj; 2723 char *dc_ddname; /* last component of ddobj's name */ 2724 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2725 void *dc_arg; 2726 int dc_flags; 2727 kmutex_t *dc_error_lock; 2728 int *dc_error; 2729 } dmu_objset_find_ctx_t; 2730 2731 static void 2732 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2733 { 2734 dsl_pool_t *dp = dcp->dc_dp; 2735 dsl_dir_t *dd; 2736 dsl_dataset_t *ds; 2737 zap_cursor_t zc; 2738 zap_attribute_t *attr; 2739 uint64_t thisobj; 2740 int err = 0; 2741 2742 /* don't process if there already was an error */ 2743 if (*dcp->dc_error != 0) 2744 goto out; 2745 2746 /* 2747 * Note: passing the name (dc_ddname) here is optional, but it 2748 * improves performance because we don't need to call 2749 * zap_value_search() to determine the name. 2750 */ 2751 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2752 if (err != 0) 2753 goto out; 2754 2755 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2756 if (dd->dd_myname[0] == '$') { 2757 dsl_dir_rele(dd, FTAG); 2758 goto out; 2759 } 2760 2761 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2762 attr = zap_attribute_alloc(); 2763 2764 /* 2765 * Iterate over all children. 2766 */ 2767 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2768 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2769 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2770 zap_cursor_retrieve(&zc, attr) == 0; 2771 (void) zap_cursor_advance(&zc)) { 2772 ASSERT3U(attr->za_integer_length, ==, 2773 sizeof (uint64_t)); 2774 ASSERT3U(attr->za_num_integers, ==, 1); 2775 2776 dmu_objset_find_ctx_t *child_dcp = 2777 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2778 *child_dcp = *dcp; 2779 child_dcp->dc_ddobj = attr->za_first_integer; 2780 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2781 if (dcp->dc_tq != NULL) 2782 (void) taskq_dispatch(dcp->dc_tq, 2783 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2784 else 2785 dmu_objset_find_dp_impl(child_dcp); 2786 } 2787 zap_cursor_fini(&zc); 2788 } 2789 2790 /* 2791 * Iterate over all snapshots. 2792 */ 2793 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2794 dsl_dataset_t *ds; 2795 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2796 2797 if (err == 0) { 2798 uint64_t snapobj; 2799 2800 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2801 dsl_dataset_rele(ds, FTAG); 2802 2803 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2804 zap_cursor_retrieve(&zc, attr) == 0; 2805 (void) zap_cursor_advance(&zc)) { 2806 ASSERT3U(attr->za_integer_length, ==, 2807 sizeof (uint64_t)); 2808 ASSERT3U(attr->za_num_integers, ==, 1); 2809 2810 err = dsl_dataset_hold_obj(dp, 2811 attr->za_first_integer, FTAG, &ds); 2812 if (err != 0) 2813 break; 2814 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2815 dsl_dataset_rele(ds, FTAG); 2816 if (err != 0) 2817 break; 2818 } 2819 zap_cursor_fini(&zc); 2820 } 2821 } 2822 2823 zap_attribute_free(attr); 2824 2825 if (err != 0) { 2826 dsl_dir_rele(dd, FTAG); 2827 goto out; 2828 } 2829 2830 /* 2831 * Apply to self. 2832 */ 2833 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2834 2835 /* 2836 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2837 * that the dir will remain cached, and we won't have to re-instantiate 2838 * it (which could be expensive due to finding its name via 2839 * zap_value_search()). 2840 */ 2841 dsl_dir_rele(dd, FTAG); 2842 if (err != 0) 2843 goto out; 2844 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2845 dsl_dataset_rele(ds, FTAG); 2846 2847 out: 2848 if (err != 0) { 2849 mutex_enter(dcp->dc_error_lock); 2850 /* only keep first error */ 2851 if (*dcp->dc_error == 0) 2852 *dcp->dc_error = err; 2853 mutex_exit(dcp->dc_error_lock); 2854 } 2855 2856 if (dcp->dc_ddname != NULL) 2857 spa_strfree(dcp->dc_ddname); 2858 kmem_free(dcp, sizeof (*dcp)); 2859 } 2860 2861 static void 2862 dmu_objset_find_dp_cb(void *arg) 2863 { 2864 dmu_objset_find_ctx_t *dcp = arg; 2865 dsl_pool_t *dp = dcp->dc_dp; 2866 2867 /* 2868 * We need to get a pool_config_lock here, as there are several 2869 * assert(pool_config_held) down the stack. Getting a lock via 2870 * dsl_pool_config_enter is risky, as it might be stalled by a 2871 * pending writer. This would deadlock, as the write lock can 2872 * only be granted when our parent thread gives up the lock. 2873 * The _prio interface gives us priority over a pending writer. 2874 */ 2875 dsl_pool_config_enter_prio(dp, FTAG); 2876 2877 dmu_objset_find_dp_impl(dcp); 2878 2879 dsl_pool_config_exit(dp, FTAG); 2880 } 2881 2882 /* 2883 * Find objsets under and including ddobj, call func(ds) on each. 2884 * The order for the enumeration is completely undefined. 2885 * func is called with dsl_pool_config held. 2886 */ 2887 int 2888 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2889 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2890 { 2891 int error = 0; 2892 taskq_t *tq = NULL; 2893 int ntasks; 2894 dmu_objset_find_ctx_t *dcp; 2895 kmutex_t err_lock; 2896 2897 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2898 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2899 dcp->dc_tq = NULL; 2900 dcp->dc_dp = dp; 2901 dcp->dc_ddobj = ddobj; 2902 dcp->dc_ddname = NULL; 2903 dcp->dc_func = func; 2904 dcp->dc_arg = arg; 2905 dcp->dc_flags = flags; 2906 dcp->dc_error_lock = &err_lock; 2907 dcp->dc_error = &error; 2908 2909 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2910 /* 2911 * In case a write lock is held we can't make use of 2912 * parallelism, as down the stack of the worker threads 2913 * the lock is asserted via dsl_pool_config_held. 2914 * In case of a read lock this is solved by getting a read 2915 * lock in each worker thread, which isn't possible in case 2916 * of a writer lock. So we fall back to the synchronous path 2917 * here. 2918 * In the future it might be possible to get some magic into 2919 * dsl_pool_config_held in a way that it returns true for 2920 * the worker threads so that a single lock held from this 2921 * thread suffices. For now, stay single threaded. 2922 */ 2923 dmu_objset_find_dp_impl(dcp); 2924 mutex_destroy(&err_lock); 2925 2926 return (error); 2927 } 2928 2929 ntasks = dmu_find_threads; 2930 if (ntasks == 0) 2931 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2932 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2933 INT_MAX, 0); 2934 if (tq == NULL) { 2935 kmem_free(dcp, sizeof (*dcp)); 2936 mutex_destroy(&err_lock); 2937 2938 return (SET_ERROR(ENOMEM)); 2939 } 2940 dcp->dc_tq = tq; 2941 2942 /* dcp will be freed by task */ 2943 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2944 2945 /* 2946 * PORTING: this code relies on the property of taskq_wait to wait 2947 * until no more tasks are queued and no more tasks are active. As 2948 * we always queue new tasks from within other tasks, task_wait 2949 * reliably waits for the full recursion to finish, even though we 2950 * enqueue new tasks after taskq_wait has been called. 2951 * On platforms other than illumos, taskq_wait may not have this 2952 * property. 2953 */ 2954 taskq_wait(tq); 2955 taskq_destroy(tq); 2956 mutex_destroy(&err_lock); 2957 2958 return (error); 2959 } 2960 2961 /* 2962 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2963 * The dp_config_rwlock must not be held when this is called, and it 2964 * will not be held when the callback is called. 2965 * Therefore this function should only be used when the pool is not changing 2966 * (e.g. in syncing context), or the callback can deal with the possible races. 2967 */ 2968 static int 2969 dmu_objset_find_impl(spa_t *spa, const char *name, 2970 int func(const char *, void *), void *arg, int flags) 2971 { 2972 dsl_dir_t *dd; 2973 dsl_pool_t *dp = spa_get_dsl(spa); 2974 dsl_dataset_t *ds; 2975 zap_cursor_t zc; 2976 zap_attribute_t *attr; 2977 char *child; 2978 uint64_t thisobj; 2979 int err; 2980 2981 dsl_pool_config_enter(dp, FTAG); 2982 2983 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2984 if (err != 0) { 2985 dsl_pool_config_exit(dp, FTAG); 2986 return (err); 2987 } 2988 2989 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2990 if (dd->dd_myname[0] == '$') { 2991 dsl_dir_rele(dd, FTAG); 2992 dsl_pool_config_exit(dp, FTAG); 2993 return (0); 2994 } 2995 2996 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2997 attr = zap_attribute_alloc(); 2998 2999 /* 3000 * Iterate over all children. 3001 */ 3002 if (flags & DS_FIND_CHILDREN) { 3003 for (zap_cursor_init(&zc, dp->dp_meta_objset, 3004 dsl_dir_phys(dd)->dd_child_dir_zapobj); 3005 zap_cursor_retrieve(&zc, attr) == 0; 3006 (void) zap_cursor_advance(&zc)) { 3007 ASSERT3U(attr->za_integer_length, ==, 3008 sizeof (uint64_t)); 3009 ASSERT3U(attr->za_num_integers, ==, 1); 3010 3011 child = kmem_asprintf("%s/%s", name, attr->za_name); 3012 dsl_pool_config_exit(dp, FTAG); 3013 err = dmu_objset_find_impl(spa, child, 3014 func, arg, flags); 3015 dsl_pool_config_enter(dp, FTAG); 3016 kmem_strfree(child); 3017 if (err != 0) 3018 break; 3019 } 3020 zap_cursor_fini(&zc); 3021 3022 if (err != 0) { 3023 dsl_dir_rele(dd, FTAG); 3024 dsl_pool_config_exit(dp, FTAG); 3025 zap_attribute_free(attr); 3026 return (err); 3027 } 3028 } 3029 3030 /* 3031 * Iterate over all snapshots. 3032 */ 3033 if (flags & DS_FIND_SNAPSHOTS) { 3034 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 3035 3036 if (err == 0) { 3037 uint64_t snapobj; 3038 3039 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 3040 dsl_dataset_rele(ds, FTAG); 3041 3042 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 3043 zap_cursor_retrieve(&zc, attr) == 0; 3044 (void) zap_cursor_advance(&zc)) { 3045 ASSERT3U(attr->za_integer_length, ==, 3046 sizeof (uint64_t)); 3047 ASSERT3U(attr->za_num_integers, ==, 1); 3048 3049 child = kmem_asprintf("%s@%s", 3050 name, attr->za_name); 3051 dsl_pool_config_exit(dp, FTAG); 3052 err = func(child, arg); 3053 dsl_pool_config_enter(dp, FTAG); 3054 kmem_strfree(child); 3055 if (err != 0) 3056 break; 3057 } 3058 zap_cursor_fini(&zc); 3059 } 3060 } 3061 3062 dsl_dir_rele(dd, FTAG); 3063 zap_attribute_free(attr); 3064 dsl_pool_config_exit(dp, FTAG); 3065 3066 if (err != 0) 3067 return (err); 3068 3069 /* Apply to self. */ 3070 return (func(name, arg)); 3071 } 3072 3073 /* 3074 * See comment above dmu_objset_find_impl(). 3075 */ 3076 int 3077 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 3078 int flags) 3079 { 3080 spa_t *spa; 3081 int error; 3082 3083 error = spa_open(name, &spa, FTAG); 3084 if (error != 0) 3085 return (error); 3086 error = dmu_objset_find_impl(spa, name, func, arg, flags); 3087 spa_close(spa, FTAG); 3088 return (error); 3089 } 3090 3091 boolean_t 3092 dmu_objset_incompatible_encryption_version(objset_t *os) 3093 { 3094 return (dsl_dir_incompatible_encryption_version( 3095 os->os_dsl_dataset->ds_dir)); 3096 } 3097 3098 void 3099 dmu_objset_set_user(objset_t *os, void *user_ptr) 3100 { 3101 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 3102 os->os_user_ptr = user_ptr; 3103 } 3104 3105 void * 3106 dmu_objset_get_user(objset_t *os) 3107 { 3108 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 3109 return (os->os_user_ptr); 3110 } 3111 3112 /* 3113 * Determine name of filesystem, given name of snapshot. 3114 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 3115 */ 3116 int 3117 dmu_fsname(const char *snapname, char *buf) 3118 { 3119 char *atp = strchr(snapname, '@'); 3120 if (atp == NULL) 3121 return (SET_ERROR(EINVAL)); 3122 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 3123 return (SET_ERROR(ENAMETOOLONG)); 3124 (void) strlcpy(buf, snapname, atp - snapname + 1); 3125 return (0); 3126 } 3127 3128 /* 3129 * Call when we think we're going to write/free space in open context 3130 * to track the amount of dirty data in the open txg, which is also the 3131 * amount of memory that can not be evicted until this txg syncs. 3132 * 3133 * Note that there are two conditions where this can be called from 3134 * syncing context: 3135 * 3136 * [1] When we just created the dataset, in which case we go on with 3137 * updating any accounting of dirty data as usual. 3138 * [2] When we are dirtying MOS data, in which case we only update the 3139 * pool's accounting of dirty data. 3140 */ 3141 void 3142 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3143 { 3144 dsl_dataset_t *ds = os->os_dsl_dataset; 3145 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3146 3147 if (ds != NULL) { 3148 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3149 } 3150 3151 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3152 } 3153 3154 #if defined(_KERNEL) 3155 EXPORT_SYMBOL(dmu_objset_zil); 3156 EXPORT_SYMBOL(dmu_objset_pool); 3157 EXPORT_SYMBOL(dmu_objset_ds); 3158 EXPORT_SYMBOL(dmu_objset_type); 3159 EXPORT_SYMBOL(dmu_objset_name); 3160 EXPORT_SYMBOL(dmu_objset_hold); 3161 EXPORT_SYMBOL(dmu_objset_hold_flags); 3162 EXPORT_SYMBOL(dmu_objset_own); 3163 EXPORT_SYMBOL(dmu_objset_rele); 3164 EXPORT_SYMBOL(dmu_objset_rele_flags); 3165 EXPORT_SYMBOL(dmu_objset_disown); 3166 EXPORT_SYMBOL(dmu_objset_from_ds); 3167 EXPORT_SYMBOL(dmu_objset_create); 3168 EXPORT_SYMBOL(dmu_objset_clone); 3169 EXPORT_SYMBOL(dmu_objset_stats); 3170 EXPORT_SYMBOL(dmu_objset_fast_stat); 3171 EXPORT_SYMBOL(dmu_objset_spa); 3172 EXPORT_SYMBOL(dmu_objset_space); 3173 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3174 EXPORT_SYMBOL(dmu_objset_find); 3175 EXPORT_SYMBOL(dmu_objset_byteswap); 3176 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3177 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3178 EXPORT_SYMBOL(dmu_objset_dnodesize); 3179 3180 EXPORT_SYMBOL(dmu_objset_sync); 3181 EXPORT_SYMBOL(dmu_objset_is_dirty); 3182 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3183 EXPORT_SYMBOL(dmu_objset_create_impl); 3184 EXPORT_SYMBOL(dmu_objset_open_impl); 3185 EXPORT_SYMBOL(dmu_objset_evict); 3186 EXPORT_SYMBOL(dmu_objset_register_type); 3187 EXPORT_SYMBOL(dmu_objset_sync_done); 3188 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3189 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3190 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3191 EXPORT_SYMBOL(dmu_objset_userspace_present); 3192 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3193 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3194 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3195 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3196 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3197 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3198 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3199 #endif 3200