1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2012, 2020 by Delphix. All rights reserved. 25 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 26 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 27 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 28 * Copyright (c) 2015, STRATO AG, Inc. All rights reserved. 29 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 30 * Copyright 2017 Nexenta Systems, Inc. 31 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved. 32 * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. 33 * Copyright (c) 2019, Klara Inc. 34 * Copyright (c) 2019, Allan Jude 35 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP. 36 */ 37 38 /* Portions Copyright 2010 Robert Milkowski */ 39 40 #include <sys/cred.h> 41 #include <sys/zfs_context.h> 42 #include <sys/dmu_objset.h> 43 #include <sys/dsl_dir.h> 44 #include <sys/dsl_dataset.h> 45 #include <sys/dsl_prop.h> 46 #include <sys/dsl_pool.h> 47 #include <sys/dsl_synctask.h> 48 #include <sys/dsl_deleg.h> 49 #include <sys/dnode.h> 50 #include <sys/dbuf.h> 51 #include <sys/zvol.h> 52 #include <sys/dmu_tx.h> 53 #include <sys/zap.h> 54 #include <sys/zil.h> 55 #include <sys/dmu_impl.h> 56 #include <sys/zfs_ioctl.h> 57 #include <sys/sa.h> 58 #include <sys/zfs_onexit.h> 59 #include <sys/dsl_destroy.h> 60 #include <sys/vdev.h> 61 #include <sys/zfeature.h> 62 #include <sys/policy.h> 63 #include <sys/spa_impl.h> 64 #include <sys/dmu_recv.h> 65 #include <sys/zfs_project.h> 66 #include "zfs_namecheck.h" 67 #include <sys/vdev_impl.h> 68 #include <sys/arc.h> 69 70 /* 71 * Needed to close a window in dnode_move() that allows the objset to be freed 72 * before it can be safely accessed. 73 */ 74 krwlock_t os_lock; 75 76 /* 77 * Tunable to overwrite the maximum number of threads for the parallelization 78 * of dmu_objset_find_dp, needed to speed up the import of pools with many 79 * datasets. 80 * Default is 4 times the number of leaf vdevs. 81 */ 82 static const int dmu_find_threads = 0; 83 84 /* 85 * Backfill lower metadnode objects after this many have been freed. 86 * Backfilling negatively impacts object creation rates, so only do it 87 * if there are enough holes to fill. 88 */ 89 static const int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT; 90 91 static const char *upgrade_tag = "upgrade_tag"; 92 93 static void dmu_objset_find_dp_cb(void *arg); 94 95 static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb); 96 static void dmu_objset_upgrade_stop(objset_t *os); 97 98 void 99 dmu_objset_init(void) 100 { 101 rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 102 } 103 104 void 105 dmu_objset_fini(void) 106 { 107 rw_destroy(&os_lock); 108 } 109 110 spa_t * 111 dmu_objset_spa(objset_t *os) 112 { 113 return (os->os_spa); 114 } 115 116 zilog_t * 117 dmu_objset_zil(objset_t *os) 118 { 119 return (os->os_zil); 120 } 121 122 dsl_pool_t * 123 dmu_objset_pool(objset_t *os) 124 { 125 dsl_dataset_t *ds; 126 127 if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 128 return (ds->ds_dir->dd_pool); 129 else 130 return (spa_get_dsl(os->os_spa)); 131 } 132 133 dsl_dataset_t * 134 dmu_objset_ds(objset_t *os) 135 { 136 return (os->os_dsl_dataset); 137 } 138 139 dmu_objset_type_t 140 dmu_objset_type(objset_t *os) 141 { 142 return (os->os_phys->os_type); 143 } 144 145 void 146 dmu_objset_name(objset_t *os, char *buf) 147 { 148 dsl_dataset_name(os->os_dsl_dataset, buf); 149 } 150 151 uint64_t 152 dmu_objset_id(objset_t *os) 153 { 154 dsl_dataset_t *ds = os->os_dsl_dataset; 155 156 return (ds ? ds->ds_object : 0); 157 } 158 159 uint64_t 160 dmu_objset_dnodesize(objset_t *os) 161 { 162 return (os->os_dnodesize); 163 } 164 165 zfs_sync_type_t 166 dmu_objset_syncprop(objset_t *os) 167 { 168 return (os->os_sync); 169 } 170 171 zfs_logbias_op_t 172 dmu_objset_logbias(objset_t *os) 173 { 174 return (os->os_logbias); 175 } 176 177 static void 178 checksum_changed_cb(void *arg, uint64_t newval) 179 { 180 objset_t *os = arg; 181 182 /* 183 * Inheritance should have been done by now. 184 */ 185 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 186 187 os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 188 } 189 190 static void 191 compression_changed_cb(void *arg, uint64_t newval) 192 { 193 objset_t *os = arg; 194 195 /* 196 * Inheritance and range checking should have been done by now. 197 */ 198 ASSERT(newval != ZIO_COMPRESS_INHERIT); 199 200 os->os_compress = zio_compress_select(os->os_spa, 201 ZIO_COMPRESS_ALGO(newval), ZIO_COMPRESS_ON); 202 os->os_complevel = zio_complevel_select(os->os_spa, os->os_compress, 203 ZIO_COMPRESS_LEVEL(newval), ZIO_COMPLEVEL_DEFAULT); 204 } 205 206 static void 207 copies_changed_cb(void *arg, uint64_t newval) 208 { 209 objset_t *os = arg; 210 211 /* 212 * Inheritance and range checking should have been done by now. 213 */ 214 ASSERT(newval > 0); 215 ASSERT(newval <= spa_max_replication(os->os_spa)); 216 217 os->os_copies = newval; 218 } 219 220 static void 221 dedup_changed_cb(void *arg, uint64_t newval) 222 { 223 objset_t *os = arg; 224 spa_t *spa = os->os_spa; 225 enum zio_checksum checksum; 226 227 /* 228 * Inheritance should have been done by now. 229 */ 230 ASSERT(newval != ZIO_CHECKSUM_INHERIT); 231 232 checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 233 234 os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 235 os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 236 } 237 238 static void 239 primary_cache_changed_cb(void *arg, uint64_t newval) 240 { 241 objset_t *os = arg; 242 243 /* 244 * Inheritance and range checking should have been done by now. 245 */ 246 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 247 newval == ZFS_CACHE_METADATA); 248 249 os->os_primary_cache = newval; 250 } 251 252 static void 253 secondary_cache_changed_cb(void *arg, uint64_t newval) 254 { 255 objset_t *os = arg; 256 257 /* 258 * Inheritance and range checking should have been done by now. 259 */ 260 ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 261 newval == ZFS_CACHE_METADATA); 262 263 os->os_secondary_cache = newval; 264 } 265 266 static void 267 prefetch_changed_cb(void *arg, uint64_t newval) 268 { 269 objset_t *os = arg; 270 271 /* 272 * Inheritance should have been done by now. 273 */ 274 ASSERT(newval == ZFS_PREFETCH_ALL || newval == ZFS_PREFETCH_NONE || 275 newval == ZFS_PREFETCH_METADATA); 276 os->os_prefetch = newval; 277 } 278 279 static void 280 sync_changed_cb(void *arg, uint64_t newval) 281 { 282 objset_t *os = arg; 283 284 /* 285 * Inheritance and range checking should have been done by now. 286 */ 287 ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 288 newval == ZFS_SYNC_DISABLED); 289 290 os->os_sync = newval; 291 if (os->os_zil) 292 zil_set_sync(os->os_zil, newval); 293 } 294 295 static void 296 redundant_metadata_changed_cb(void *arg, uint64_t newval) 297 { 298 objset_t *os = arg; 299 300 /* 301 * Inheritance and range checking should have been done by now. 302 */ 303 ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL || 304 newval == ZFS_REDUNDANT_METADATA_MOST || 305 newval == ZFS_REDUNDANT_METADATA_SOME || 306 newval == ZFS_REDUNDANT_METADATA_NONE); 307 308 os->os_redundant_metadata = newval; 309 } 310 311 static void 312 dnodesize_changed_cb(void *arg, uint64_t newval) 313 { 314 objset_t *os = arg; 315 316 switch (newval) { 317 case ZFS_DNSIZE_LEGACY: 318 os->os_dnodesize = DNODE_MIN_SIZE; 319 break; 320 case ZFS_DNSIZE_AUTO: 321 /* 322 * Choose a dnode size that will work well for most 323 * workloads if the user specified "auto". Future code 324 * improvements could dynamically select a dnode size 325 * based on observed workload patterns. 326 */ 327 os->os_dnodesize = DNODE_MIN_SIZE * 2; 328 break; 329 case ZFS_DNSIZE_1K: 330 case ZFS_DNSIZE_2K: 331 case ZFS_DNSIZE_4K: 332 case ZFS_DNSIZE_8K: 333 case ZFS_DNSIZE_16K: 334 os->os_dnodesize = newval; 335 break; 336 } 337 } 338 339 static void 340 smallblk_changed_cb(void *arg, uint64_t newval) 341 { 342 objset_t *os = arg; 343 344 /* 345 * Inheritance and range checking should have been done by now. 346 */ 347 ASSERT(newval <= SPA_MAXBLOCKSIZE); 348 ASSERT(ISP2(newval)); 349 350 os->os_zpl_special_smallblock = newval; 351 } 352 353 static void 354 logbias_changed_cb(void *arg, uint64_t newval) 355 { 356 objset_t *os = arg; 357 358 ASSERT(newval == ZFS_LOGBIAS_LATENCY || 359 newval == ZFS_LOGBIAS_THROUGHPUT); 360 os->os_logbias = newval; 361 if (os->os_zil) 362 zil_set_logbias(os->os_zil, newval); 363 } 364 365 static void 366 recordsize_changed_cb(void *arg, uint64_t newval) 367 { 368 objset_t *os = arg; 369 370 os->os_recordsize = newval; 371 } 372 373 void 374 dmu_objset_byteswap(void *buf, size_t size) 375 { 376 objset_phys_t *osp = buf; 377 378 ASSERT(size == OBJSET_PHYS_SIZE_V1 || size == OBJSET_PHYS_SIZE_V2 || 379 size == sizeof (objset_phys_t)); 380 dnode_byteswap(&osp->os_meta_dnode); 381 byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 382 osp->os_type = BSWAP_64(osp->os_type); 383 osp->os_flags = BSWAP_64(osp->os_flags); 384 if (size >= OBJSET_PHYS_SIZE_V2) { 385 dnode_byteswap(&osp->os_userused_dnode); 386 dnode_byteswap(&osp->os_groupused_dnode); 387 if (size >= sizeof (objset_phys_t)) 388 dnode_byteswap(&osp->os_projectused_dnode); 389 } 390 } 391 392 /* 393 * The hash is a CRC-based hash of the objset_t pointer and the object number. 394 */ 395 static uint64_t 396 dnode_hash(const objset_t *os, uint64_t obj) 397 { 398 uintptr_t osv = (uintptr_t)os; 399 uint64_t crc = -1ULL; 400 401 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 402 /* 403 * The low 6 bits of the pointer don't have much entropy, because 404 * the objset_t is larger than 2^6 bytes long. 405 */ 406 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF]; 407 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF]; 408 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF]; 409 crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF]; 410 411 crc ^= (osv>>14) ^ (obj>>24); 412 413 return (crc); 414 } 415 416 static unsigned int 417 dnode_multilist_index_func(multilist_t *ml, void *obj) 418 { 419 dnode_t *dn = obj; 420 421 /* 422 * The low order bits of the hash value are thought to be 423 * distributed evenly. Otherwise, in the case that the multilist 424 * has a power of two number of sublists, each sublists' usage 425 * would not be evenly distributed. In this context full 64bit 426 * division would be a waste of time, so limit it to 32 bits. 427 */ 428 return ((unsigned int)dnode_hash(dn->dn_objset, dn->dn_object) % 429 multilist_get_num_sublists(ml)); 430 } 431 432 static inline boolean_t 433 dmu_os_is_l2cacheable(objset_t *os) 434 { 435 if (os->os_secondary_cache == ZFS_CACHE_ALL || 436 os->os_secondary_cache == ZFS_CACHE_METADATA) { 437 if (l2arc_exclude_special == 0) 438 return (B_TRUE); 439 440 blkptr_t *bp = os->os_rootbp; 441 if (bp == NULL || BP_IS_HOLE(bp)) 442 return (B_FALSE); 443 uint64_t vdev = DVA_GET_VDEV(bp->blk_dva); 444 vdev_t *rvd = os->os_spa->spa_root_vdev; 445 vdev_t *vd = NULL; 446 447 if (vdev < rvd->vdev_children) 448 vd = rvd->vdev_child[vdev]; 449 450 if (vd == NULL) 451 return (B_TRUE); 452 453 if (vd->vdev_alloc_bias != VDEV_BIAS_SPECIAL && 454 vd->vdev_alloc_bias != VDEV_BIAS_DEDUP) 455 return (B_TRUE); 456 } 457 return (B_FALSE); 458 } 459 460 /* 461 * Instantiates the objset_t in-memory structure corresponding to the 462 * objset_phys_t that's pointed to by the specified blkptr_t. 463 */ 464 int 465 dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 466 objset_t **osp) 467 { 468 objset_t *os; 469 int i, err; 470 471 ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 472 ASSERT(!BP_IS_REDACTED(bp)); 473 474 /* 475 * We need the pool config lock to get properties. 476 */ 477 ASSERT(ds == NULL || dsl_pool_config_held(ds->ds_dir->dd_pool)); 478 479 /* 480 * The $ORIGIN dataset (if it exists) doesn't have an associated 481 * objset, so there's no reason to open it. The $ORIGIN dataset 482 * will not exist on pools older than SPA_VERSION_ORIGIN. 483 */ 484 if (ds != NULL && spa_get_dsl(spa) != NULL && 485 spa_get_dsl(spa)->dp_origin_snap != NULL) { 486 ASSERT3P(ds->ds_dir, !=, 487 spa_get_dsl(spa)->dp_origin_snap->ds_dir); 488 } 489 490 os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 491 os->os_dsl_dataset = ds; 492 os->os_spa = spa; 493 os->os_rootbp = bp; 494 if (!BP_IS_HOLE(os->os_rootbp)) { 495 arc_flags_t aflags = ARC_FLAG_WAIT; 496 zbookmark_phys_t zb; 497 int size; 498 zio_flag_t zio_flags = ZIO_FLAG_CANFAIL; 499 SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 500 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 501 502 if (dmu_os_is_l2cacheable(os)) 503 aflags |= ARC_FLAG_L2CACHE; 504 505 if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) { 506 ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); 507 ASSERT(BP_IS_AUTHENTICATED(bp)); 508 zio_flags |= ZIO_FLAG_RAW; 509 } 510 511 dprintf_bp(os->os_rootbp, "reading %s", ""); 512 err = arc_read(NULL, spa, os->os_rootbp, 513 arc_getbuf_func, &os->os_phys_buf, 514 ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb); 515 if (err != 0) { 516 kmem_free(os, sizeof (objset_t)); 517 /* convert checksum errors into IO errors */ 518 if (err == ECKSUM) 519 err = SET_ERROR(EIO); 520 return (err); 521 } 522 523 if (spa_version(spa) < SPA_VERSION_USERSPACE) 524 size = OBJSET_PHYS_SIZE_V1; 525 else if (!spa_feature_is_enabled(spa, 526 SPA_FEATURE_PROJECT_QUOTA)) 527 size = OBJSET_PHYS_SIZE_V2; 528 else 529 size = sizeof (objset_phys_t); 530 531 /* Increase the blocksize if we are permitted. */ 532 if (arc_buf_size(os->os_phys_buf) < size) { 533 arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf, 534 ARC_BUFC_METADATA, size); 535 memset(buf->b_data, 0, size); 536 memcpy(buf->b_data, os->os_phys_buf->b_data, 537 arc_buf_size(os->os_phys_buf)); 538 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 539 os->os_phys_buf = buf; 540 } 541 542 os->os_phys = os->os_phys_buf->b_data; 543 os->os_flags = os->os_phys->os_flags; 544 } else { 545 int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 546 sizeof (objset_phys_t) : OBJSET_PHYS_SIZE_V1; 547 os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf, 548 ARC_BUFC_METADATA, size); 549 os->os_phys = os->os_phys_buf->b_data; 550 memset(os->os_phys, 0, size); 551 } 552 /* 553 * These properties will be filled in by the logic in zfs_get_zplprop() 554 * when they are queried for the first time. 555 */ 556 os->os_version = OBJSET_PROP_UNINITIALIZED; 557 os->os_normalization = OBJSET_PROP_UNINITIALIZED; 558 os->os_utf8only = OBJSET_PROP_UNINITIALIZED; 559 os->os_casesensitivity = OBJSET_PROP_UNINITIALIZED; 560 561 /* 562 * Note: the changed_cb will be called once before the register 563 * func returns, thus changing the checksum/compression from the 564 * default (fletcher2/off). Snapshots don't need to know about 565 * checksum/compression/copies. 566 */ 567 if (ds != NULL) { 568 os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0); 569 570 err = dsl_prop_register(ds, 571 zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 572 primary_cache_changed_cb, os); 573 if (err == 0) { 574 err = dsl_prop_register(ds, 575 zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 576 secondary_cache_changed_cb, os); 577 } 578 if (err == 0) { 579 err = dsl_prop_register(ds, 580 zfs_prop_to_name(ZFS_PROP_PREFETCH), 581 prefetch_changed_cb, os); 582 } 583 if (!ds->ds_is_snapshot) { 584 if (err == 0) { 585 err = dsl_prop_register(ds, 586 zfs_prop_to_name(ZFS_PROP_CHECKSUM), 587 checksum_changed_cb, os); 588 } 589 if (err == 0) { 590 err = dsl_prop_register(ds, 591 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 592 compression_changed_cb, os); 593 } 594 if (err == 0) { 595 err = dsl_prop_register(ds, 596 zfs_prop_to_name(ZFS_PROP_COPIES), 597 copies_changed_cb, os); 598 } 599 if (err == 0) { 600 err = dsl_prop_register(ds, 601 zfs_prop_to_name(ZFS_PROP_DEDUP), 602 dedup_changed_cb, os); 603 } 604 if (err == 0) { 605 err = dsl_prop_register(ds, 606 zfs_prop_to_name(ZFS_PROP_LOGBIAS), 607 logbias_changed_cb, os); 608 } 609 if (err == 0) { 610 err = dsl_prop_register(ds, 611 zfs_prop_to_name(ZFS_PROP_SYNC), 612 sync_changed_cb, os); 613 } 614 if (err == 0) { 615 err = dsl_prop_register(ds, 616 zfs_prop_to_name( 617 ZFS_PROP_REDUNDANT_METADATA), 618 redundant_metadata_changed_cb, os); 619 } 620 if (err == 0) { 621 err = dsl_prop_register(ds, 622 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 623 recordsize_changed_cb, os); 624 } 625 if (err == 0) { 626 err = dsl_prop_register(ds, 627 zfs_prop_to_name(ZFS_PROP_DNODESIZE), 628 dnodesize_changed_cb, os); 629 } 630 if (err == 0) { 631 err = dsl_prop_register(ds, 632 zfs_prop_to_name( 633 ZFS_PROP_SPECIAL_SMALL_BLOCKS), 634 smallblk_changed_cb, os); 635 } 636 } 637 if (err != 0) { 638 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 639 kmem_free(os, sizeof (objset_t)); 640 return (err); 641 } 642 } else { 643 /* It's the meta-objset. */ 644 os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 645 os->os_compress = ZIO_COMPRESS_ON; 646 os->os_complevel = ZIO_COMPLEVEL_DEFAULT; 647 os->os_encrypted = B_FALSE; 648 os->os_copies = spa_max_replication(spa); 649 os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 650 os->os_dedup_verify = B_FALSE; 651 os->os_logbias = ZFS_LOGBIAS_LATENCY; 652 os->os_sync = ZFS_SYNC_STANDARD; 653 os->os_primary_cache = ZFS_CACHE_ALL; 654 os->os_secondary_cache = ZFS_CACHE_ALL; 655 os->os_dnodesize = DNODE_MIN_SIZE; 656 os->os_prefetch = ZFS_PREFETCH_ALL; 657 } 658 659 if (ds == NULL || !ds->ds_is_snapshot) 660 os->os_zil_header = os->os_phys->os_zil_header; 661 os->os_zil = zil_alloc(os, &os->os_zil_header); 662 663 for (i = 0; i < TXG_SIZE; i++) { 664 multilist_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 665 offsetof(dnode_t, dn_dirty_link[i]), 666 dnode_multilist_index_func); 667 } 668 list_create(&os->os_dnodes, sizeof (dnode_t), 669 offsetof(dnode_t, dn_link)); 670 list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 671 offsetof(dmu_buf_impl_t, db_link)); 672 673 list_link_init(&os->os_evicting_node); 674 675 mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 676 mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL); 677 mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 678 mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 679 os->os_obj_next_percpu_len = boot_ncpus; 680 os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len * 681 sizeof (os->os_obj_next_percpu[0]), KM_SLEEP); 682 683 dnode_special_open(os, &os->os_phys->os_meta_dnode, 684 DMU_META_DNODE_OBJECT, &os->os_meta_dnode); 685 if (OBJSET_BUF_HAS_USERUSED(os->os_phys_buf)) { 686 dnode_special_open(os, &os->os_phys->os_userused_dnode, 687 DMU_USERUSED_OBJECT, &os->os_userused_dnode); 688 dnode_special_open(os, &os->os_phys->os_groupused_dnode, 689 DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode); 690 if (OBJSET_BUF_HAS_PROJECTUSED(os->os_phys_buf)) 691 dnode_special_open(os, 692 &os->os_phys->os_projectused_dnode, 693 DMU_PROJECTUSED_OBJECT, &os->os_projectused_dnode); 694 } 695 696 mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL); 697 698 *osp = os; 699 return (0); 700 } 701 702 int 703 dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 704 { 705 int err = 0; 706 707 /* 708 * We need the pool_config lock to manipulate the dsl_dataset_t. 709 * Even if the dataset is long-held, we need the pool_config lock 710 * to open the objset, as it needs to get properties. 711 */ 712 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 713 714 mutex_enter(&ds->ds_opening_lock); 715 if (ds->ds_objset == NULL) { 716 objset_t *os; 717 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 718 err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 719 ds, dsl_dataset_get_blkptr(ds), &os); 720 rrw_exit(&ds->ds_bp_rwlock, FTAG); 721 722 if (err == 0) { 723 mutex_enter(&ds->ds_lock); 724 ASSERT(ds->ds_objset == NULL); 725 ds->ds_objset = os; 726 mutex_exit(&ds->ds_lock); 727 } 728 } 729 *osp = ds->ds_objset; 730 mutex_exit(&ds->ds_opening_lock); 731 return (err); 732 } 733 734 /* 735 * Holds the pool while the objset is held. Therefore only one objset 736 * can be held at a time. 737 */ 738 int 739 dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag, 740 objset_t **osp) 741 { 742 dsl_pool_t *dp; 743 dsl_dataset_t *ds; 744 int err; 745 ds_hold_flags_t flags; 746 747 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 748 err = dsl_pool_hold(name, tag, &dp); 749 if (err != 0) 750 return (err); 751 err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds); 752 if (err != 0) { 753 dsl_pool_rele(dp, tag); 754 return (err); 755 } 756 757 err = dmu_objset_from_ds(ds, osp); 758 if (err != 0) { 759 dsl_dataset_rele(ds, tag); 760 dsl_pool_rele(dp, tag); 761 } 762 763 return (err); 764 } 765 766 int 767 dmu_objset_hold(const char *name, const void *tag, objset_t **osp) 768 { 769 return (dmu_objset_hold_flags(name, B_FALSE, tag, osp)); 770 } 771 772 static int 773 dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type, 774 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 775 { 776 (void) tag; 777 778 int err = dmu_objset_from_ds(ds, osp); 779 if (err != 0) { 780 return (err); 781 } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 782 return (SET_ERROR(EINVAL)); 783 } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 784 return (SET_ERROR(EROFS)); 785 } else if (!readonly && decrypt && 786 dsl_dir_incompatible_encryption_version(ds->ds_dir)) { 787 return (SET_ERROR(EROFS)); 788 } 789 790 /* if we are decrypting, we can now check MACs in os->os_phys_buf */ 791 if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) { 792 zbookmark_phys_t zb; 793 794 SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT, 795 ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 796 err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa, 797 &zb, B_FALSE); 798 if (err != 0) 799 return (err); 800 801 ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf)); 802 } 803 804 return (0); 805 } 806 807 /* 808 * dsl_pool must not be held when this is called. 809 * Upon successful return, there will be a longhold on the dataset, 810 * and the dsl_pool will not be held. 811 */ 812 int 813 dmu_objset_own(const char *name, dmu_objset_type_t type, 814 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 815 { 816 dsl_pool_t *dp; 817 dsl_dataset_t *ds; 818 int err; 819 ds_hold_flags_t flags; 820 821 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 822 err = dsl_pool_hold(name, FTAG, &dp); 823 if (err != 0) 824 return (err); 825 err = dsl_dataset_own(dp, name, flags, tag, &ds); 826 if (err != 0) { 827 dsl_pool_rele(dp, FTAG); 828 return (err); 829 } 830 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 831 if (err != 0) { 832 dsl_dataset_disown(ds, flags, tag); 833 dsl_pool_rele(dp, FTAG); 834 return (err); 835 } 836 837 /* 838 * User accounting requires the dataset to be decrypted and rw. 839 * We also don't begin user accounting during claiming to help 840 * speed up pool import times and to keep this txg reserved 841 * completely for recovery work. 842 */ 843 if (!readonly && !dp->dp_spa->spa_claiming && 844 (ds->ds_dir->dd_crypto_obj == 0 || decrypt)) { 845 if (dmu_objset_userobjspace_upgradable(*osp) || 846 dmu_objset_projectquota_upgradable(*osp)) { 847 dmu_objset_id_quota_upgrade(*osp); 848 } else if (dmu_objset_userused_enabled(*osp)) { 849 dmu_objset_userspace_upgrade(*osp); 850 } 851 } 852 853 dsl_pool_rele(dp, FTAG); 854 return (0); 855 } 856 857 int 858 dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type, 859 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp) 860 { 861 dsl_dataset_t *ds; 862 int err; 863 ds_hold_flags_t flags; 864 865 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 866 err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds); 867 if (err != 0) 868 return (err); 869 870 err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp); 871 if (err != 0) { 872 dsl_dataset_disown(ds, flags, tag); 873 return (err); 874 } 875 876 return (0); 877 } 878 879 void 880 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag) 881 { 882 ds_hold_flags_t flags; 883 dsl_pool_t *dp = dmu_objset_pool(os); 884 885 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 886 dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag); 887 dsl_pool_rele(dp, tag); 888 } 889 890 void 891 dmu_objset_rele(objset_t *os, const void *tag) 892 { 893 dmu_objset_rele_flags(os, B_FALSE, tag); 894 } 895 896 /* 897 * When we are called, os MUST refer to an objset associated with a dataset 898 * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 899 * == tag. We will then release and reacquire ownership of the dataset while 900 * holding the pool config_rwlock to avoid intervening namespace or ownership 901 * changes may occur. 902 * 903 * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 904 * release the hold on its dataset and acquire a new one on the dataset of the 905 * same name so that it can be partially torn down and reconstructed. 906 */ 907 void 908 dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds, 909 boolean_t decrypt, const void *tag) 910 { 911 dsl_pool_t *dp; 912 char name[ZFS_MAX_DATASET_NAME_LEN]; 913 ds_hold_flags_t flags; 914 915 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 916 VERIFY3P(ds, !=, NULL); 917 VERIFY3P(ds->ds_owner, ==, tag); 918 VERIFY(dsl_dataset_long_held(ds)); 919 920 dsl_dataset_name(ds, name); 921 dp = ds->ds_dir->dd_pool; 922 dsl_pool_config_enter(dp, FTAG); 923 dsl_dataset_disown(ds, flags, tag); 924 VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds)); 925 dsl_pool_config_exit(dp, FTAG); 926 } 927 928 void 929 dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag) 930 { 931 ds_hold_flags_t flags; 932 933 flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE; 934 /* 935 * Stop upgrading thread 936 */ 937 dmu_objset_upgrade_stop(os); 938 dsl_dataset_disown(os->os_dsl_dataset, flags, tag); 939 } 940 941 void 942 dmu_objset_evict_dbufs(objset_t *os) 943 { 944 dnode_t *dn_marker; 945 dnode_t *dn; 946 947 dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP); 948 949 mutex_enter(&os->os_lock); 950 dn = list_head(&os->os_dnodes); 951 while (dn != NULL) { 952 /* 953 * Skip dnodes without holds. We have to do this dance 954 * because dnode_add_ref() only works if there is already a 955 * hold. If the dnode has no holds, then it has no dbufs. 956 */ 957 if (dnode_add_ref(dn, FTAG)) { 958 list_insert_after(&os->os_dnodes, dn, dn_marker); 959 mutex_exit(&os->os_lock); 960 961 dnode_evict_dbufs(dn); 962 dnode_rele(dn, FTAG); 963 964 mutex_enter(&os->os_lock); 965 dn = list_next(&os->os_dnodes, dn_marker); 966 list_remove(&os->os_dnodes, dn_marker); 967 } else { 968 dn = list_next(&os->os_dnodes, dn); 969 } 970 } 971 mutex_exit(&os->os_lock); 972 973 kmem_free(dn_marker, sizeof (dnode_t)); 974 975 if (DMU_USERUSED_DNODE(os) != NULL) { 976 if (DMU_PROJECTUSED_DNODE(os) != NULL) 977 dnode_evict_dbufs(DMU_PROJECTUSED_DNODE(os)); 978 dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os)); 979 dnode_evict_dbufs(DMU_USERUSED_DNODE(os)); 980 } 981 dnode_evict_dbufs(DMU_META_DNODE(os)); 982 } 983 984 /* 985 * Objset eviction processing is split into into two pieces. 986 * The first marks the objset as evicting, evicts any dbufs that 987 * have a refcount of zero, and then queues up the objset for the 988 * second phase of eviction. Once os->os_dnodes has been cleared by 989 * dnode_buf_pageout()->dnode_destroy(), the second phase is executed. 990 * The second phase closes the special dnodes, dequeues the objset from 991 * the list of those undergoing eviction, and finally frees the objset. 992 * 993 * NOTE: Due to asynchronous eviction processing (invocation of 994 * dnode_buf_pageout()), it is possible for the meta dnode for the 995 * objset to have no holds even though os->os_dnodes is not empty. 996 */ 997 void 998 dmu_objset_evict(objset_t *os) 999 { 1000 dsl_dataset_t *ds = os->os_dsl_dataset; 1001 1002 for (int t = 0; t < TXG_SIZE; t++) 1003 ASSERT(!dmu_objset_is_dirty(os, t)); 1004 1005 if (ds) 1006 dsl_prop_unregister_all(ds, os); 1007 1008 if (os->os_sa) 1009 sa_tear_down(os); 1010 1011 dmu_objset_evict_dbufs(os); 1012 1013 mutex_enter(&os->os_lock); 1014 spa_evicting_os_register(os->os_spa, os); 1015 if (list_is_empty(&os->os_dnodes)) { 1016 mutex_exit(&os->os_lock); 1017 dmu_objset_evict_done(os); 1018 } else { 1019 mutex_exit(&os->os_lock); 1020 } 1021 1022 1023 } 1024 1025 void 1026 dmu_objset_evict_done(objset_t *os) 1027 { 1028 ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 1029 1030 dnode_special_close(&os->os_meta_dnode); 1031 if (DMU_USERUSED_DNODE(os)) { 1032 if (DMU_PROJECTUSED_DNODE(os)) 1033 dnode_special_close(&os->os_projectused_dnode); 1034 dnode_special_close(&os->os_userused_dnode); 1035 dnode_special_close(&os->os_groupused_dnode); 1036 } 1037 zil_free(os->os_zil); 1038 1039 arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf); 1040 1041 /* 1042 * This is a barrier to prevent the objset from going away in 1043 * dnode_move() until we can safely ensure that the objset is still in 1044 * use. We consider the objset valid before the barrier and invalid 1045 * after the barrier. 1046 */ 1047 rw_enter(&os_lock, RW_READER); 1048 rw_exit(&os_lock); 1049 1050 kmem_free(os->os_obj_next_percpu, 1051 os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0])); 1052 1053 mutex_destroy(&os->os_lock); 1054 mutex_destroy(&os->os_userused_lock); 1055 mutex_destroy(&os->os_obj_lock); 1056 mutex_destroy(&os->os_user_ptr_lock); 1057 mutex_destroy(&os->os_upgrade_lock); 1058 for (int i = 0; i < TXG_SIZE; i++) 1059 multilist_destroy(&os->os_dirty_dnodes[i]); 1060 spa_evicting_os_deregister(os->os_spa, os); 1061 kmem_free(os, sizeof (objset_t)); 1062 } 1063 1064 inode_timespec_t 1065 dmu_objset_snap_cmtime(objset_t *os) 1066 { 1067 return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 1068 } 1069 1070 objset_t * 1071 dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1072 dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx) 1073 { 1074 objset_t *os; 1075 dnode_t *mdn; 1076 1077 ASSERT(dmu_tx_is_syncing(tx)); 1078 1079 if (blksz == 0) 1080 blksz = DNODE_BLOCK_SIZE; 1081 if (ibs == 0) 1082 ibs = DN_MAX_INDBLKSHIFT; 1083 1084 if (ds != NULL) 1085 VERIFY0(dmu_objset_from_ds(ds, &os)); 1086 else 1087 VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 1088 1089 mdn = DMU_META_DNODE(os); 1090 1091 dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0, 1092 DNODE_MIN_SLOTS, tx); 1093 1094 /* 1095 * We don't want to have to increase the meta-dnode's nlevels 1096 * later, because then we could do it in quiescing context while 1097 * we are also accessing it in open context. 1098 * 1099 * This precaution is not necessary for the MOS (ds == NULL), 1100 * because the MOS is only updated in syncing context. 1101 * This is most fortunate: the MOS is the only objset that 1102 * needs to be synced multiple times as spa_sync() iterates 1103 * to convergence, so minimizing its dn_nlevels matters. 1104 */ 1105 if (ds != NULL) { 1106 if (levels == 0) { 1107 levels = 1; 1108 1109 /* 1110 * Determine the number of levels necessary for the 1111 * meta-dnode to contain DN_MAX_OBJECT dnodes. Note 1112 * that in order to ensure that we do not overflow 1113 * 64 bits, there has to be a nlevels that gives us a 1114 * number of blocks > DN_MAX_OBJECT but < 2^64. 1115 * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) 1116 * (10) must be less than (64 - log2(DN_MAX_OBJECT)) 1117 * (16). 1118 */ 1119 while ((uint64_t)mdn->dn_nblkptr << 1120 (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * 1121 (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 1122 DN_MAX_OBJECT) 1123 levels++; 1124 } 1125 1126 mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 1127 mdn->dn_nlevels = levels; 1128 } 1129 1130 ASSERT(type != DMU_OST_NONE); 1131 ASSERT(type != DMU_OST_ANY); 1132 ASSERT(type < DMU_OST_NUMTYPES); 1133 os->os_phys->os_type = type; 1134 1135 /* 1136 * Enable user accounting if it is enabled and this is not an 1137 * encrypted receive. 1138 */ 1139 if (dmu_objset_userused_enabled(os) && 1140 (!os->os_encrypted || !dmu_objset_is_receiving(os))) { 1141 os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1142 if (dmu_objset_userobjused_enabled(os)) { 1143 ASSERT3P(ds, !=, NULL); 1144 ds->ds_feature_activation[ 1145 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 1146 os->os_phys->os_flags |= 1147 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 1148 } 1149 if (dmu_objset_projectquota_enabled(os)) { 1150 ASSERT3P(ds, !=, NULL); 1151 ds->ds_feature_activation[ 1152 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 1153 os->os_phys->os_flags |= 1154 OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 1155 } 1156 os->os_flags = os->os_phys->os_flags; 1157 } 1158 1159 dsl_dataset_dirty(ds, tx); 1160 1161 return (os); 1162 } 1163 1164 /* called from dsl for meta-objset */ 1165 objset_t * 1166 dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 1167 dmu_objset_type_t type, dmu_tx_t *tx) 1168 { 1169 return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx)); 1170 } 1171 1172 typedef struct dmu_objset_create_arg { 1173 const char *doca_name; 1174 cred_t *doca_cred; 1175 proc_t *doca_proc; 1176 void (*doca_userfunc)(objset_t *os, void *arg, 1177 cred_t *cr, dmu_tx_t *tx); 1178 void *doca_userarg; 1179 dmu_objset_type_t doca_type; 1180 uint64_t doca_flags; 1181 dsl_crypto_params_t *doca_dcp; 1182 } dmu_objset_create_arg_t; 1183 1184 static int 1185 dmu_objset_create_check(void *arg, dmu_tx_t *tx) 1186 { 1187 dmu_objset_create_arg_t *doca = arg; 1188 dsl_pool_t *dp = dmu_tx_pool(tx); 1189 dsl_dir_t *pdd; 1190 dsl_dataset_t *parentds; 1191 objset_t *parentos; 1192 const char *tail; 1193 int error; 1194 1195 if (strchr(doca->doca_name, '@') != NULL) 1196 return (SET_ERROR(EINVAL)); 1197 1198 if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) 1199 return (SET_ERROR(ENAMETOOLONG)); 1200 1201 if (dataset_nestcheck(doca->doca_name) != 0) 1202 return (SET_ERROR(ENAMETOOLONG)); 1203 1204 error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 1205 if (error != 0) 1206 return (error); 1207 if (tail == NULL) { 1208 dsl_dir_rele(pdd, FTAG); 1209 return (SET_ERROR(EEXIST)); 1210 } 1211 1212 error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp, NULL); 1213 if (error != 0) { 1214 dsl_dir_rele(pdd, FTAG); 1215 return (error); 1216 } 1217 1218 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1219 doca->doca_cred, doca->doca_proc); 1220 if (error != 0) { 1221 dsl_dir_rele(pdd, FTAG); 1222 return (error); 1223 } 1224 1225 /* can't create below anything but filesystems (eg. no ZVOLs) */ 1226 error = dsl_dataset_hold_obj(pdd->dd_pool, 1227 dsl_dir_phys(pdd)->dd_head_dataset_obj, FTAG, &parentds); 1228 if (error != 0) { 1229 dsl_dir_rele(pdd, FTAG); 1230 return (error); 1231 } 1232 error = dmu_objset_from_ds(parentds, &parentos); 1233 if (error != 0) { 1234 dsl_dataset_rele(parentds, FTAG); 1235 dsl_dir_rele(pdd, FTAG); 1236 return (error); 1237 } 1238 if (dmu_objset_type(parentos) != DMU_OST_ZFS) { 1239 dsl_dataset_rele(parentds, FTAG); 1240 dsl_dir_rele(pdd, FTAG); 1241 return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1242 } 1243 dsl_dataset_rele(parentds, FTAG); 1244 dsl_dir_rele(pdd, FTAG); 1245 1246 return (error); 1247 } 1248 1249 static void 1250 dmu_objset_create_sync(void *arg, dmu_tx_t *tx) 1251 { 1252 dmu_objset_create_arg_t *doca = arg; 1253 dsl_pool_t *dp = dmu_tx_pool(tx); 1254 spa_t *spa = dp->dp_spa; 1255 dsl_dir_t *pdd; 1256 const char *tail; 1257 dsl_dataset_t *ds; 1258 uint64_t obj; 1259 blkptr_t *bp; 1260 objset_t *os; 1261 zio_t *rzio; 1262 1263 VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 1264 1265 obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 1266 doca->doca_cred, doca->doca_dcp, tx); 1267 1268 VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj, 1269 DS_HOLD_FLAG_DECRYPT, FTAG, &ds)); 1270 rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1271 bp = dsl_dataset_get_blkptr(ds); 1272 os = dmu_objset_create_impl(spa, ds, bp, doca->doca_type, tx); 1273 rrw_exit(&ds->ds_bp_rwlock, FTAG); 1274 1275 if (doca->doca_userfunc != NULL) { 1276 doca->doca_userfunc(os, doca->doca_userarg, 1277 doca->doca_cred, tx); 1278 } 1279 1280 /* 1281 * The doca_userfunc() may write out some data that needs to be 1282 * encrypted if the dataset is encrypted (specifically the root 1283 * directory). This data must be written out before the encryption 1284 * key mapping is removed by dsl_dataset_rele_flags(). Force the 1285 * I/O to occur immediately by invoking the relevant sections of 1286 * dsl_pool_sync(). 1287 */ 1288 if (os->os_encrypted) { 1289 dsl_dataset_t *tmpds = NULL; 1290 boolean_t need_sync_done = B_FALSE; 1291 1292 mutex_enter(&ds->ds_lock); 1293 ds->ds_owner = FTAG; 1294 mutex_exit(&ds->ds_lock); 1295 1296 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1297 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1298 tx->tx_txg); 1299 if (tmpds != NULL) { 1300 dsl_dataset_sync(ds, rzio, tx); 1301 need_sync_done = B_TRUE; 1302 } 1303 VERIFY0(zio_wait(rzio)); 1304 1305 dmu_objset_sync_done(os, tx); 1306 taskq_wait(dp->dp_sync_taskq); 1307 if (txg_list_member(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1308 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1309 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1310 } 1311 1312 rzio = zio_root(spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1313 tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds, 1314 tx->tx_txg); 1315 if (tmpds != NULL) { 1316 dmu_buf_rele(ds->ds_dbuf, ds); 1317 dsl_dataset_sync(ds, rzio, tx); 1318 } 1319 VERIFY0(zio_wait(rzio)); 1320 1321 if (need_sync_done) { 1322 ASSERT3P(ds->ds_key_mapping, !=, NULL); 1323 key_mapping_rele(spa, ds->ds_key_mapping, ds); 1324 dsl_dataset_sync_done(ds, tx); 1325 dmu_buf_rele(ds->ds_dbuf, ds); 1326 } 1327 1328 mutex_enter(&ds->ds_lock); 1329 ds->ds_owner = NULL; 1330 mutex_exit(&ds->ds_lock); 1331 } 1332 1333 spa_history_log_internal_ds(ds, "create", tx, " "); 1334 1335 dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG); 1336 dsl_dir_rele(pdd, FTAG); 1337 } 1338 1339 int 1340 dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 1341 dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg) 1342 { 1343 dmu_objset_create_arg_t doca; 1344 dsl_crypto_params_t tmp_dcp = { 0 }; 1345 1346 doca.doca_name = name; 1347 doca.doca_cred = CRED(); 1348 doca.doca_proc = curproc; 1349 doca.doca_flags = flags; 1350 doca.doca_userfunc = func; 1351 doca.doca_userarg = arg; 1352 doca.doca_type = type; 1353 1354 /* 1355 * Some callers (mostly for testing) do not provide a dcp on their 1356 * own but various code inside the sync task will require it to be 1357 * allocated. Rather than adding NULL checks throughout this code 1358 * or adding dummy dcp's to all of the callers we simply create a 1359 * dummy one here and use that. This zero dcp will have the same 1360 * effect as asking for inheritance of all encryption params. 1361 */ 1362 doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp; 1363 1364 int rv = dsl_sync_task(name, 1365 dmu_objset_create_check, dmu_objset_create_sync, &doca, 1366 6, ZFS_SPACE_CHECK_NORMAL); 1367 1368 if (rv == 0) 1369 zvol_create_minor(name); 1370 return (rv); 1371 } 1372 1373 typedef struct dmu_objset_clone_arg { 1374 const char *doca_clone; 1375 const char *doca_origin; 1376 cred_t *doca_cred; 1377 proc_t *doca_proc; 1378 } dmu_objset_clone_arg_t; 1379 1380 static int 1381 dmu_objset_clone_check(void *arg, dmu_tx_t *tx) 1382 { 1383 dmu_objset_clone_arg_t *doca = arg; 1384 dsl_dir_t *pdd; 1385 const char *tail; 1386 int error; 1387 dsl_dataset_t *origin; 1388 dsl_pool_t *dp = dmu_tx_pool(tx); 1389 1390 if (strchr(doca->doca_clone, '@') != NULL) 1391 return (SET_ERROR(EINVAL)); 1392 1393 if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) 1394 return (SET_ERROR(ENAMETOOLONG)); 1395 1396 error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 1397 if (error != 0) 1398 return (error); 1399 if (tail == NULL) { 1400 dsl_dir_rele(pdd, FTAG); 1401 return (SET_ERROR(EEXIST)); 1402 } 1403 1404 error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 1405 doca->doca_cred, doca->doca_proc); 1406 if (error != 0) { 1407 dsl_dir_rele(pdd, FTAG); 1408 return (SET_ERROR(EDQUOT)); 1409 } 1410 1411 error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 1412 if (error != 0) { 1413 dsl_dir_rele(pdd, FTAG); 1414 return (error); 1415 } 1416 1417 /* You can only clone snapshots, not the head datasets. */ 1418 if (!origin->ds_is_snapshot) { 1419 dsl_dataset_rele(origin, FTAG); 1420 dsl_dir_rele(pdd, FTAG); 1421 return (SET_ERROR(EINVAL)); 1422 } 1423 1424 dsl_dataset_rele(origin, FTAG); 1425 dsl_dir_rele(pdd, FTAG); 1426 1427 return (0); 1428 } 1429 1430 static void 1431 dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 1432 { 1433 dmu_objset_clone_arg_t *doca = arg; 1434 dsl_pool_t *dp = dmu_tx_pool(tx); 1435 dsl_dir_t *pdd; 1436 const char *tail; 1437 dsl_dataset_t *origin, *ds; 1438 uint64_t obj; 1439 char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 1440 1441 VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 1442 VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 1443 1444 obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 1445 doca->doca_cred, NULL, tx); 1446 1447 VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 1448 dsl_dataset_name(origin, namebuf); 1449 spa_history_log_internal_ds(ds, "clone", tx, 1450 "origin=%s (%llu)", namebuf, (u_longlong_t)origin->ds_object); 1451 dsl_dataset_rele(ds, FTAG); 1452 dsl_dataset_rele(origin, FTAG); 1453 dsl_dir_rele(pdd, FTAG); 1454 } 1455 1456 int 1457 dmu_objset_clone(const char *clone, const char *origin) 1458 { 1459 dmu_objset_clone_arg_t doca; 1460 1461 doca.doca_clone = clone; 1462 doca.doca_origin = origin; 1463 doca.doca_cred = CRED(); 1464 doca.doca_proc = curproc; 1465 1466 int rv = dsl_sync_task(clone, 1467 dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 1468 6, ZFS_SPACE_CHECK_NORMAL); 1469 1470 if (rv == 0) 1471 zvol_create_minor(clone); 1472 1473 return (rv); 1474 } 1475 1476 int 1477 dmu_objset_snapshot_one(const char *fsname, const char *snapname) 1478 { 1479 int err; 1480 char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 1481 nvlist_t *snaps = fnvlist_alloc(); 1482 1483 fnvlist_add_boolean(snaps, longsnap); 1484 kmem_strfree(longsnap); 1485 err = dsl_dataset_snapshot(snaps, NULL, NULL); 1486 fnvlist_free(snaps); 1487 return (err); 1488 } 1489 1490 static void 1491 dmu_objset_upgrade_task_cb(void *data) 1492 { 1493 objset_t *os = data; 1494 1495 mutex_enter(&os->os_upgrade_lock); 1496 os->os_upgrade_status = EINTR; 1497 if (!os->os_upgrade_exit) { 1498 int status; 1499 1500 mutex_exit(&os->os_upgrade_lock); 1501 1502 status = os->os_upgrade_cb(os); 1503 1504 mutex_enter(&os->os_upgrade_lock); 1505 1506 os->os_upgrade_status = status; 1507 } 1508 os->os_upgrade_exit = B_TRUE; 1509 os->os_upgrade_id = 0; 1510 mutex_exit(&os->os_upgrade_lock); 1511 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1512 } 1513 1514 static void 1515 dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb) 1516 { 1517 if (os->os_upgrade_id != 0) 1518 return; 1519 1520 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1521 dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag); 1522 1523 mutex_enter(&os->os_upgrade_lock); 1524 if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) { 1525 os->os_upgrade_exit = B_FALSE; 1526 os->os_upgrade_cb = cb; 1527 os->os_upgrade_id = taskq_dispatch( 1528 os->os_spa->spa_upgrade_taskq, 1529 dmu_objset_upgrade_task_cb, os, TQ_SLEEP); 1530 if (os->os_upgrade_id == TASKQID_INVALID) { 1531 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1532 os->os_upgrade_status = ENOMEM; 1533 } 1534 } else { 1535 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1536 } 1537 mutex_exit(&os->os_upgrade_lock); 1538 } 1539 1540 static void 1541 dmu_objset_upgrade_stop(objset_t *os) 1542 { 1543 mutex_enter(&os->os_upgrade_lock); 1544 os->os_upgrade_exit = B_TRUE; 1545 if (os->os_upgrade_id != 0) { 1546 taskqid_t id = os->os_upgrade_id; 1547 1548 os->os_upgrade_id = 0; 1549 mutex_exit(&os->os_upgrade_lock); 1550 1551 if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) { 1552 dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag); 1553 } 1554 txg_wait_synced(os->os_spa->spa_dsl_pool, 0); 1555 } else { 1556 mutex_exit(&os->os_upgrade_lock); 1557 } 1558 } 1559 1560 static void 1561 dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx) 1562 { 1563 dnode_t *dn; 1564 1565 while ((dn = multilist_sublist_head(list)) != NULL) { 1566 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 1567 ASSERT(dn->dn_dbuf->db_data_pending); 1568 /* 1569 * Initialize dn_zio outside dnode_sync() because the 1570 * meta-dnode needs to set it outside dnode_sync(). 1571 */ 1572 dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 1573 ASSERT(dn->dn_zio); 1574 1575 ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 1576 multilist_sublist_remove(list, dn); 1577 1578 /* 1579 * See the comment above dnode_rele_task() for an explanation 1580 * of why this dnode hold is always needed (even when not 1581 * doing user accounting). 1582 */ 1583 multilist_t *newlist = &dn->dn_objset->os_synced_dnodes; 1584 (void) dnode_add_ref(dn, newlist); 1585 multilist_insert(newlist, dn); 1586 1587 dnode_sync(dn, tx); 1588 } 1589 } 1590 1591 static void 1592 dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 1593 { 1594 (void) abuf; 1595 blkptr_t *bp = zio->io_bp; 1596 objset_t *os = arg; 1597 dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 1598 uint64_t fill = 0; 1599 1600 ASSERT(!BP_IS_EMBEDDED(bp)); 1601 ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 1602 ASSERT0(BP_GET_LEVEL(bp)); 1603 1604 /* 1605 * Update rootbp fill count: it should be the number of objects 1606 * allocated in the object set (not counting the "special" 1607 * objects that are stored in the objset_phys_t -- the meta 1608 * dnode and user/group/project accounting objects). 1609 */ 1610 for (int i = 0; i < dnp->dn_nblkptr; i++) 1611 fill += BP_GET_FILL(&dnp->dn_blkptr[i]); 1612 1613 BP_SET_FILL(bp, fill); 1614 1615 if (os->os_dsl_dataset != NULL) 1616 rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG); 1617 *os->os_rootbp = *bp; 1618 if (os->os_dsl_dataset != NULL) 1619 rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG); 1620 } 1621 1622 static void 1623 dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 1624 { 1625 (void) abuf; 1626 blkptr_t *bp = zio->io_bp; 1627 blkptr_t *bp_orig = &zio->io_bp_orig; 1628 objset_t *os = arg; 1629 1630 if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 1631 ASSERT(BP_EQUAL(bp, bp_orig)); 1632 } else { 1633 dsl_dataset_t *ds = os->os_dsl_dataset; 1634 dmu_tx_t *tx = os->os_synctx; 1635 1636 (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 1637 dsl_dataset_block_born(ds, bp, tx); 1638 } 1639 kmem_free(bp, sizeof (*bp)); 1640 } 1641 1642 typedef struct sync_objset_arg { 1643 zio_t *soa_zio; 1644 objset_t *soa_os; 1645 dmu_tx_t *soa_tx; 1646 kmutex_t soa_mutex; 1647 int soa_count; 1648 taskq_ent_t soa_tq_ent; 1649 } sync_objset_arg_t; 1650 1651 typedef struct sync_dnodes_arg { 1652 multilist_t *sda_list; 1653 int sda_sublist_idx; 1654 multilist_t *sda_newlist; 1655 sync_objset_arg_t *sda_soa; 1656 } sync_dnodes_arg_t; 1657 1658 static void sync_meta_dnode_task(void *arg); 1659 1660 static void 1661 sync_dnodes_task(void *arg) 1662 { 1663 sync_dnodes_arg_t *sda = arg; 1664 sync_objset_arg_t *soa = sda->sda_soa; 1665 objset_t *os = soa->soa_os; 1666 1667 multilist_sublist_t *ms = 1668 multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx); 1669 1670 dmu_objset_sync_dnodes(ms, soa->soa_tx); 1671 1672 multilist_sublist_unlock(ms); 1673 1674 kmem_free(sda, sizeof (*sda)); 1675 1676 mutex_enter(&soa->soa_mutex); 1677 ASSERT(soa->soa_count != 0); 1678 if (--soa->soa_count != 0) { 1679 mutex_exit(&soa->soa_mutex); 1680 return; 1681 } 1682 mutex_exit(&soa->soa_mutex); 1683 1684 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1685 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1686 } 1687 1688 /* 1689 * Issue the zio_nowait() for all dirty record zios on the meta dnode, 1690 * then trigger the callback for the zil_sync. This runs once for each 1691 * objset, only after any/all sublists in the objset have been synced. 1692 */ 1693 static void 1694 sync_meta_dnode_task(void *arg) 1695 { 1696 sync_objset_arg_t *soa = arg; 1697 objset_t *os = soa->soa_os; 1698 dmu_tx_t *tx = soa->soa_tx; 1699 int txgoff = tx->tx_txg & TXG_MASK; 1700 dbuf_dirty_record_t *dr; 1701 1702 ASSERT0(soa->soa_count); 1703 1704 list_t *list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1705 while ((dr = list_remove_head(list)) != NULL) { 1706 ASSERT0(dr->dr_dbuf->db_level); 1707 zio_nowait(dr->dr_zio); 1708 } 1709 1710 /* Enable dnode backfill if enough objects have been freed. */ 1711 if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) { 1712 os->os_rescan_dnodes = B_TRUE; 1713 os->os_freed_dnodes = 0; 1714 } 1715 1716 /* 1717 * Free intent log blocks up to this tx. 1718 */ 1719 zil_sync(os->os_zil, tx); 1720 os->os_phys->os_zil_header = os->os_zil_header; 1721 zio_nowait(soa->soa_zio); 1722 1723 mutex_destroy(&soa->soa_mutex); 1724 kmem_free(soa, sizeof (*soa)); 1725 } 1726 1727 /* called from dsl */ 1728 void 1729 dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1730 { 1731 int txgoff; 1732 zbookmark_phys_t zb; 1733 zio_prop_t zp; 1734 zio_t *zio; 1735 int num_sublists; 1736 multilist_t *ml; 1737 blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP); 1738 *blkptr_copy = *os->os_rootbp; 1739 1740 dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", (u_longlong_t)tx->tx_txg); 1741 1742 ASSERT(dmu_tx_is_syncing(tx)); 1743 /* XXX the write_done callback should really give us the tx... */ 1744 os->os_synctx = tx; 1745 1746 if (os->os_dsl_dataset == NULL) { 1747 /* 1748 * This is the MOS. If we have upgraded, 1749 * spa_max_replication() could change, so reset 1750 * os_copies here. 1751 */ 1752 os->os_copies = spa_max_replication(os->os_spa); 1753 } 1754 1755 /* 1756 * Create the root block IO 1757 */ 1758 SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1759 os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1760 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1761 arc_release(os->os_phys_buf, &os->os_phys_buf); 1762 1763 dmu_write_policy(os, NULL, 0, 0, &zp); 1764 1765 /* 1766 * If we are either claiming the ZIL or doing a raw receive, write 1767 * out the os_phys_buf raw. Neither of these actions will effect the 1768 * MAC at this point. 1769 */ 1770 if (os->os_raw_receive || 1771 os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1772 ASSERT(os->os_encrypted); 1773 arc_convert_to_raw(os->os_phys_buf, 1774 os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER, 1775 DMU_OT_OBJSET, NULL, NULL, NULL); 1776 } 1777 1778 zio = arc_write(pio, os->os_spa, tx->tx_txg, 1779 blkptr_copy, os->os_phys_buf, B_FALSE, dmu_os_is_l2cacheable(os), 1780 &zp, dmu_objset_write_ready, NULL, dmu_objset_write_done, 1781 os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb); 1782 1783 /* 1784 * Sync special dnodes - the parent IO for the sync is the root block 1785 */ 1786 DMU_META_DNODE(os)->dn_zio = zio; 1787 dnode_sync(DMU_META_DNODE(os), tx); 1788 1789 os->os_phys->os_flags = os->os_flags; 1790 1791 if (DMU_USERUSED_DNODE(os) && 1792 DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1793 DMU_USERUSED_DNODE(os)->dn_zio = zio; 1794 dnode_sync(DMU_USERUSED_DNODE(os), tx); 1795 DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1796 dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1797 } 1798 1799 if (DMU_PROJECTUSED_DNODE(os) && 1800 DMU_PROJECTUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1801 DMU_PROJECTUSED_DNODE(os)->dn_zio = zio; 1802 dnode_sync(DMU_PROJECTUSED_DNODE(os), tx); 1803 } 1804 1805 txgoff = tx->tx_txg & TXG_MASK; 1806 1807 /* 1808 * We must create the list here because it uses the 1809 * dn_dirty_link[] of this txg. But it may already 1810 * exist because we call dsl_dataset_sync() twice per txg. 1811 */ 1812 if (os->os_synced_dnodes.ml_sublists == NULL) { 1813 multilist_create(&os->os_synced_dnodes, sizeof (dnode_t), 1814 offsetof(dnode_t, dn_dirty_link[txgoff]), 1815 dnode_multilist_index_func); 1816 } else { 1817 ASSERT3U(os->os_synced_dnodes.ml_offset, ==, 1818 offsetof(dnode_t, dn_dirty_link[txgoff])); 1819 } 1820 1821 /* 1822 * zio_nowait(zio) is done after any/all sublist and meta dnode 1823 * zios have been nowaited, and the zil_sync() has been performed. 1824 * The soa is freed at the end of sync_meta_dnode_task. 1825 */ 1826 sync_objset_arg_t *soa = kmem_alloc(sizeof (*soa), KM_SLEEP); 1827 soa->soa_zio = zio; 1828 soa->soa_os = os; 1829 soa->soa_tx = tx; 1830 taskq_init_ent(&soa->soa_tq_ent); 1831 mutex_init(&soa->soa_mutex, NULL, MUTEX_DEFAULT, NULL); 1832 1833 ml = &os->os_dirty_dnodes[txgoff]; 1834 soa->soa_count = num_sublists = multilist_get_num_sublists(ml); 1835 1836 for (int i = 0; i < num_sublists; i++) { 1837 if (multilist_sublist_is_empty_idx(ml, i)) 1838 soa->soa_count--; 1839 } 1840 1841 if (soa->soa_count == 0) { 1842 taskq_dispatch_ent(dmu_objset_pool(os)->dp_sync_taskq, 1843 sync_meta_dnode_task, soa, TQ_FRONT, &soa->soa_tq_ent); 1844 } else { 1845 /* 1846 * Sync sublists in parallel. The last to finish 1847 * (i.e., when soa->soa_count reaches zero) must 1848 * dispatch sync_meta_dnode_task. 1849 */ 1850 for (int i = 0; i < num_sublists; i++) { 1851 if (multilist_sublist_is_empty_idx(ml, i)) 1852 continue; 1853 sync_dnodes_arg_t *sda = 1854 kmem_alloc(sizeof (*sda), KM_SLEEP); 1855 sda->sda_list = ml; 1856 sda->sda_sublist_idx = i; 1857 sda->sda_soa = soa; 1858 (void) taskq_dispatch( 1859 dmu_objset_pool(os)->dp_sync_taskq, 1860 sync_dnodes_task, sda, 0); 1861 /* sync_dnodes_task frees sda */ 1862 } 1863 } 1864 } 1865 1866 boolean_t 1867 dmu_objset_is_dirty(objset_t *os, uint64_t txg) 1868 { 1869 return (!multilist_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK])); 1870 } 1871 1872 static file_info_cb_t *file_cbs[DMU_OST_NUMTYPES]; 1873 1874 void 1875 dmu_objset_register_type(dmu_objset_type_t ost, file_info_cb_t *cb) 1876 { 1877 file_cbs[ost] = cb; 1878 } 1879 1880 int 1881 dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, const void *data, 1882 zfs_file_info_t *zfi) 1883 { 1884 file_info_cb_t *cb = file_cbs[os->os_phys->os_type]; 1885 if (cb == NULL) 1886 return (EINVAL); 1887 return (cb(bonustype, data, zfi)); 1888 } 1889 1890 boolean_t 1891 dmu_objset_userused_enabled(objset_t *os) 1892 { 1893 return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1894 file_cbs[os->os_phys->os_type] != NULL && 1895 DMU_USERUSED_DNODE(os) != NULL); 1896 } 1897 1898 boolean_t 1899 dmu_objset_userobjused_enabled(objset_t *os) 1900 { 1901 return (dmu_objset_userused_enabled(os) && 1902 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING)); 1903 } 1904 1905 boolean_t 1906 dmu_objset_projectquota_enabled(objset_t *os) 1907 { 1908 return (file_cbs[os->os_phys->os_type] != NULL && 1909 DMU_PROJECTUSED_DNODE(os) != NULL && 1910 spa_feature_is_enabled(os->os_spa, SPA_FEATURE_PROJECT_QUOTA)); 1911 } 1912 1913 typedef struct userquota_node { 1914 /* must be in the first filed, see userquota_update_cache() */ 1915 char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN]; 1916 int64_t uqn_delta; 1917 avl_node_t uqn_node; 1918 } userquota_node_t; 1919 1920 typedef struct userquota_cache { 1921 avl_tree_t uqc_user_deltas; 1922 avl_tree_t uqc_group_deltas; 1923 avl_tree_t uqc_project_deltas; 1924 } userquota_cache_t; 1925 1926 static int 1927 userquota_compare(const void *l, const void *r) 1928 { 1929 const userquota_node_t *luqn = l; 1930 const userquota_node_t *ruqn = r; 1931 int rv; 1932 1933 /* 1934 * NB: can only access uqn_id because userquota_update_cache() doesn't 1935 * pass in an entire userquota_node_t. 1936 */ 1937 rv = strcmp(luqn->uqn_id, ruqn->uqn_id); 1938 1939 return (TREE_ISIGN(rv)); 1940 } 1941 1942 static void 1943 do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx) 1944 { 1945 void *cookie; 1946 userquota_node_t *uqn; 1947 1948 ASSERT(dmu_tx_is_syncing(tx)); 1949 1950 cookie = NULL; 1951 while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas, 1952 &cookie)) != NULL) { 1953 /* 1954 * os_userused_lock protects against concurrent calls to 1955 * zap_increment_int(). It's needed because zap_increment_int() 1956 * is not thread-safe (i.e. not atomic). 1957 */ 1958 mutex_enter(&os->os_userused_lock); 1959 VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT, 1960 uqn->uqn_id, uqn->uqn_delta, tx)); 1961 mutex_exit(&os->os_userused_lock); 1962 kmem_free(uqn, sizeof (*uqn)); 1963 } 1964 avl_destroy(&cache->uqc_user_deltas); 1965 1966 cookie = NULL; 1967 while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas, 1968 &cookie)) != NULL) { 1969 mutex_enter(&os->os_userused_lock); 1970 VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT, 1971 uqn->uqn_id, uqn->uqn_delta, tx)); 1972 mutex_exit(&os->os_userused_lock); 1973 kmem_free(uqn, sizeof (*uqn)); 1974 } 1975 avl_destroy(&cache->uqc_group_deltas); 1976 1977 if (dmu_objset_projectquota_enabled(os)) { 1978 cookie = NULL; 1979 while ((uqn = avl_destroy_nodes(&cache->uqc_project_deltas, 1980 &cookie)) != NULL) { 1981 mutex_enter(&os->os_userused_lock); 1982 VERIFY0(zap_increment(os, DMU_PROJECTUSED_OBJECT, 1983 uqn->uqn_id, uqn->uqn_delta, tx)); 1984 mutex_exit(&os->os_userused_lock); 1985 kmem_free(uqn, sizeof (*uqn)); 1986 } 1987 avl_destroy(&cache->uqc_project_deltas); 1988 } 1989 } 1990 1991 static void 1992 userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta) 1993 { 1994 userquota_node_t *uqn; 1995 avl_index_t idx; 1996 1997 ASSERT(strlen(id) < sizeof (uqn->uqn_id)); 1998 /* 1999 * Use id directly for searching because uqn_id is the first field of 2000 * userquota_node_t and fields after uqn_id won't be accessed in 2001 * avl_find(). 2002 */ 2003 uqn = avl_find(avl, (const void *)id, &idx); 2004 if (uqn == NULL) { 2005 uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP); 2006 strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id)); 2007 avl_insert(avl, uqn, idx); 2008 } 2009 uqn->uqn_delta += delta; 2010 } 2011 2012 static void 2013 do_userquota_update(objset_t *os, userquota_cache_t *cache, uint64_t used, 2014 uint64_t flags, uint64_t user, uint64_t group, uint64_t project, 2015 boolean_t subtract) 2016 { 2017 if (flags & DNODE_FLAG_USERUSED_ACCOUNTED) { 2018 int64_t delta = DNODE_MIN_SIZE + used; 2019 char name[20]; 2020 2021 if (subtract) 2022 delta = -delta; 2023 2024 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)user); 2025 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 2026 2027 (void) snprintf(name, sizeof (name), "%llx", (longlong_t)group); 2028 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 2029 2030 if (dmu_objset_projectquota_enabled(os)) { 2031 (void) snprintf(name, sizeof (name), "%llx", 2032 (longlong_t)project); 2033 userquota_update_cache(&cache->uqc_project_deltas, 2034 name, delta); 2035 } 2036 } 2037 } 2038 2039 static void 2040 do_userobjquota_update(objset_t *os, userquota_cache_t *cache, uint64_t flags, 2041 uint64_t user, uint64_t group, uint64_t project, boolean_t subtract) 2042 { 2043 if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) { 2044 char name[20 + DMU_OBJACCT_PREFIX_LEN]; 2045 int delta = subtract ? -1 : 1; 2046 2047 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 2048 (longlong_t)user); 2049 userquota_update_cache(&cache->uqc_user_deltas, name, delta); 2050 2051 (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx", 2052 (longlong_t)group); 2053 userquota_update_cache(&cache->uqc_group_deltas, name, delta); 2054 2055 if (dmu_objset_projectquota_enabled(os)) { 2056 (void) snprintf(name, sizeof (name), 2057 DMU_OBJACCT_PREFIX "%llx", (longlong_t)project); 2058 userquota_update_cache(&cache->uqc_project_deltas, 2059 name, delta); 2060 } 2061 } 2062 } 2063 2064 typedef struct userquota_updates_arg { 2065 objset_t *uua_os; 2066 int uua_sublist_idx; 2067 dmu_tx_t *uua_tx; 2068 } userquota_updates_arg_t; 2069 2070 static void 2071 userquota_updates_task(void *arg) 2072 { 2073 userquota_updates_arg_t *uua = arg; 2074 objset_t *os = uua->uua_os; 2075 dmu_tx_t *tx = uua->uua_tx; 2076 dnode_t *dn; 2077 userquota_cache_t cache = { { 0 } }; 2078 2079 multilist_sublist_t *list = 2080 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2081 2082 ASSERT(multilist_sublist_head(list) == NULL || 2083 dmu_objset_userused_enabled(os)); 2084 avl_create(&cache.uqc_user_deltas, userquota_compare, 2085 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2086 avl_create(&cache.uqc_group_deltas, userquota_compare, 2087 sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node)); 2088 if (dmu_objset_projectquota_enabled(os)) 2089 avl_create(&cache.uqc_project_deltas, userquota_compare, 2090 sizeof (userquota_node_t), offsetof(userquota_node_t, 2091 uqn_node)); 2092 2093 while ((dn = multilist_sublist_head(list)) != NULL) { 2094 int flags; 2095 ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 2096 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 2097 dn->dn_phys->dn_flags & 2098 DNODE_FLAG_USERUSED_ACCOUNTED); 2099 2100 flags = dn->dn_id_flags; 2101 ASSERT(flags); 2102 if (flags & DN_ID_OLD_EXIST) { 2103 do_userquota_update(os, &cache, dn->dn_oldused, 2104 dn->dn_oldflags, dn->dn_olduid, dn->dn_oldgid, 2105 dn->dn_oldprojid, B_TRUE); 2106 do_userobjquota_update(os, &cache, dn->dn_oldflags, 2107 dn->dn_olduid, dn->dn_oldgid, 2108 dn->dn_oldprojid, B_TRUE); 2109 } 2110 if (flags & DN_ID_NEW_EXIST) { 2111 do_userquota_update(os, &cache, 2112 DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags, 2113 dn->dn_newuid, dn->dn_newgid, 2114 dn->dn_newprojid, B_FALSE); 2115 do_userobjquota_update(os, &cache, 2116 dn->dn_phys->dn_flags, dn->dn_newuid, dn->dn_newgid, 2117 dn->dn_newprojid, B_FALSE); 2118 } 2119 2120 mutex_enter(&dn->dn_mtx); 2121 dn->dn_oldused = 0; 2122 dn->dn_oldflags = 0; 2123 if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 2124 dn->dn_olduid = dn->dn_newuid; 2125 dn->dn_oldgid = dn->dn_newgid; 2126 dn->dn_oldprojid = dn->dn_newprojid; 2127 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2128 if (dn->dn_bonuslen == 0) 2129 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2130 else 2131 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2132 } 2133 dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 2134 mutex_exit(&dn->dn_mtx); 2135 2136 multilist_sublist_remove(list, dn); 2137 dnode_rele(dn, &os->os_synced_dnodes); 2138 } 2139 do_userquota_cacheflush(os, &cache, tx); 2140 multilist_sublist_unlock(list); 2141 kmem_free(uua, sizeof (*uua)); 2142 } 2143 2144 /* 2145 * Release dnode holds from dmu_objset_sync_dnodes(). When the dnode is being 2146 * synced (i.e. we have issued the zio's for blocks in the dnode), it can't be 2147 * evicted because the block containing the dnode can't be evicted until it is 2148 * written out. However, this hold is necessary to prevent the dnode_t from 2149 * being moved (via dnode_move()) while it's still referenced by 2150 * dbuf_dirty_record_t:dr_dnode. And dr_dnode is needed for 2151 * dirty_lightweight_leaf-type dirty records. 2152 * 2153 * If we are doing user-object accounting, the dnode_rele() happens from 2154 * userquota_updates_task() instead. 2155 */ 2156 static void 2157 dnode_rele_task(void *arg) 2158 { 2159 userquota_updates_arg_t *uua = arg; 2160 objset_t *os = uua->uua_os; 2161 2162 multilist_sublist_t *list = 2163 multilist_sublist_lock(&os->os_synced_dnodes, uua->uua_sublist_idx); 2164 2165 dnode_t *dn; 2166 while ((dn = multilist_sublist_head(list)) != NULL) { 2167 multilist_sublist_remove(list, dn); 2168 dnode_rele(dn, &os->os_synced_dnodes); 2169 } 2170 multilist_sublist_unlock(list); 2171 kmem_free(uua, sizeof (*uua)); 2172 } 2173 2174 /* 2175 * Return TRUE if userquota updates are needed. 2176 */ 2177 static boolean_t 2178 dmu_objset_do_userquota_updates_prep(objset_t *os, dmu_tx_t *tx) 2179 { 2180 if (!dmu_objset_userused_enabled(os)) 2181 return (B_FALSE); 2182 2183 /* 2184 * If this is a raw receive just return and handle accounting 2185 * later when we have the keys loaded. We also don't do user 2186 * accounting during claiming since the datasets are not owned 2187 * for the duration of claiming and this txg should only be 2188 * used for recovery. 2189 */ 2190 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2191 return (B_FALSE); 2192 2193 if (tx->tx_txg <= os->os_spa->spa_claim_max_txg) 2194 return (B_FALSE); 2195 2196 /* Allocate the user/group/project used objects if necessary. */ 2197 if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2198 VERIFY0(zap_create_claim(os, 2199 DMU_USERUSED_OBJECT, 2200 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2201 VERIFY0(zap_create_claim(os, 2202 DMU_GROUPUSED_OBJECT, 2203 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2204 } 2205 2206 if (dmu_objset_projectquota_enabled(os) && 2207 DMU_PROJECTUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 2208 VERIFY0(zap_create_claim(os, DMU_PROJECTUSED_OBJECT, 2209 DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 2210 } 2211 return (B_TRUE); 2212 } 2213 2214 /* 2215 * Dispatch taskq tasks to dp_sync_taskq to update the user accounting, and 2216 * also release the holds on the dnodes from dmu_objset_sync_dnodes(). 2217 * The caller must taskq_wait(dp_sync_taskq). 2218 */ 2219 void 2220 dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx) 2221 { 2222 boolean_t need_userquota = dmu_objset_do_userquota_updates_prep(os, tx); 2223 2224 int num_sublists = multilist_get_num_sublists(&os->os_synced_dnodes); 2225 for (int i = 0; i < num_sublists; i++) { 2226 userquota_updates_arg_t *uua = 2227 kmem_alloc(sizeof (*uua), KM_SLEEP); 2228 uua->uua_os = os; 2229 uua->uua_sublist_idx = i; 2230 uua->uua_tx = tx; 2231 2232 /* 2233 * If we don't need to update userquotas, use 2234 * dnode_rele_task() to call dnode_rele() 2235 */ 2236 (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq, 2237 need_userquota ? userquota_updates_task : dnode_rele_task, 2238 uua, 0); 2239 /* callback frees uua */ 2240 } 2241 } 2242 2243 2244 /* 2245 * Returns a pointer to data to find uid/gid from 2246 * 2247 * If a dirty record for transaction group that is syncing can't 2248 * be found then NULL is returned. In the NULL case it is assumed 2249 * the uid/gid aren't changing. 2250 */ 2251 static void * 2252 dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 2253 { 2254 dbuf_dirty_record_t *dr; 2255 void *data; 2256 2257 if (db->db_dirtycnt == 0) 2258 return (db->db.db_data); /* Nothing is changing */ 2259 2260 dr = dbuf_find_dirty_eq(db, tx->tx_txg); 2261 2262 if (dr == NULL) { 2263 data = NULL; 2264 } else { 2265 if (dr->dr_dnode->dn_bonuslen == 0 && 2266 dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 2267 data = dr->dt.dl.dr_data->b_data; 2268 else 2269 data = dr->dt.dl.dr_data; 2270 } 2271 2272 return (data); 2273 } 2274 2275 void 2276 dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 2277 { 2278 objset_t *os = dn->dn_objset; 2279 void *data = NULL; 2280 dmu_buf_impl_t *db = NULL; 2281 int flags = dn->dn_id_flags; 2282 int error; 2283 boolean_t have_spill = B_FALSE; 2284 2285 if (!dmu_objset_userused_enabled(dn->dn_objset)) 2286 return; 2287 2288 /* 2289 * Raw receives introduce a problem with user accounting. Raw 2290 * receives cannot update the user accounting info because the 2291 * user ids and the sizes are encrypted. To guarantee that we 2292 * never end up with bad user accounting, we simply disable it 2293 * during raw receives. We also disable this for normal receives 2294 * so that an incremental raw receive may be done on top of an 2295 * existing non-raw receive. 2296 */ 2297 if (os->os_encrypted && dmu_objset_is_receiving(os)) 2298 return; 2299 2300 if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 2301 DN_ID_CHKED_SPILL))) 2302 return; 2303 2304 if (before && dn->dn_bonuslen != 0) 2305 data = DN_BONUS(dn->dn_phys); 2306 else if (!before && dn->dn_bonuslen != 0) { 2307 if (dn->dn_bonus) { 2308 db = dn->dn_bonus; 2309 mutex_enter(&db->db_mtx); 2310 data = dmu_objset_userquota_find_data(db, tx); 2311 } else { 2312 data = DN_BONUS(dn->dn_phys); 2313 } 2314 } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 2315 int rf = 0; 2316 2317 if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 2318 rf |= DB_RF_HAVESTRUCT; 2319 error = dmu_spill_hold_by_dnode(dn, 2320 rf | DB_RF_MUST_SUCCEED, 2321 FTAG, (dmu_buf_t **)&db); 2322 ASSERT(error == 0); 2323 mutex_enter(&db->db_mtx); 2324 data = (before) ? db->db.db_data : 2325 dmu_objset_userquota_find_data(db, tx); 2326 have_spill = B_TRUE; 2327 } else { 2328 mutex_enter(&dn->dn_mtx); 2329 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2330 mutex_exit(&dn->dn_mtx); 2331 return; 2332 } 2333 2334 /* 2335 * Must always call the callback in case the object 2336 * type has changed and that type isn't an object type to track 2337 */ 2338 zfs_file_info_t zfi; 2339 error = file_cbs[os->os_phys->os_type](dn->dn_bonustype, data, &zfi); 2340 2341 if (before) { 2342 ASSERT(data); 2343 dn->dn_olduid = zfi.zfi_user; 2344 dn->dn_oldgid = zfi.zfi_group; 2345 dn->dn_oldprojid = zfi.zfi_project; 2346 } else if (data) { 2347 dn->dn_newuid = zfi.zfi_user; 2348 dn->dn_newgid = zfi.zfi_group; 2349 dn->dn_newprojid = zfi.zfi_project; 2350 } 2351 2352 /* 2353 * Preserve existing uid/gid when the callback can't determine 2354 * what the new uid/gid are and the callback returned EEXIST. 2355 * The EEXIST error tells us to just use the existing uid/gid. 2356 * If we don't know what the old values are then just assign 2357 * them to 0, since that is a new file being created. 2358 */ 2359 if (!before && data == NULL && error == EEXIST) { 2360 if (flags & DN_ID_OLD_EXIST) { 2361 dn->dn_newuid = dn->dn_olduid; 2362 dn->dn_newgid = dn->dn_oldgid; 2363 dn->dn_newprojid = dn->dn_oldprojid; 2364 } else { 2365 dn->dn_newuid = 0; 2366 dn->dn_newgid = 0; 2367 dn->dn_newprojid = ZFS_DEFAULT_PROJID; 2368 } 2369 error = 0; 2370 } 2371 2372 if (db) 2373 mutex_exit(&db->db_mtx); 2374 2375 mutex_enter(&dn->dn_mtx); 2376 if (error == 0 && before) 2377 dn->dn_id_flags |= DN_ID_OLD_EXIST; 2378 if (error == 0 && !before) 2379 dn->dn_id_flags |= DN_ID_NEW_EXIST; 2380 2381 if (have_spill) { 2382 dn->dn_id_flags |= DN_ID_CHKED_SPILL; 2383 } else { 2384 dn->dn_id_flags |= DN_ID_CHKED_BONUS; 2385 } 2386 mutex_exit(&dn->dn_mtx); 2387 if (have_spill) 2388 dmu_buf_rele((dmu_buf_t *)db, FTAG); 2389 } 2390 2391 boolean_t 2392 dmu_objset_userspace_present(objset_t *os) 2393 { 2394 return (os->os_phys->os_flags & 2395 OBJSET_FLAG_USERACCOUNTING_COMPLETE); 2396 } 2397 2398 boolean_t 2399 dmu_objset_userobjspace_present(objset_t *os) 2400 { 2401 return (os->os_phys->os_flags & 2402 OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE); 2403 } 2404 2405 boolean_t 2406 dmu_objset_projectquota_present(objset_t *os) 2407 { 2408 return (os->os_phys->os_flags & 2409 OBJSET_FLAG_PROJECTQUOTA_COMPLETE); 2410 } 2411 2412 static int 2413 dmu_objset_space_upgrade(objset_t *os) 2414 { 2415 uint64_t obj; 2416 int err = 0; 2417 2418 /* 2419 * We simply need to mark every object dirty, so that it will be 2420 * synced out and now accounted. If this is called 2421 * concurrently, or if we already did some work before crashing, 2422 * that's fine, since we track each object's accounted state 2423 * independently. 2424 */ 2425 2426 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 2427 dmu_tx_t *tx; 2428 dmu_buf_t *db; 2429 int objerr; 2430 2431 mutex_enter(&os->os_upgrade_lock); 2432 if (os->os_upgrade_exit) 2433 err = SET_ERROR(EINTR); 2434 mutex_exit(&os->os_upgrade_lock); 2435 if (err != 0) 2436 return (err); 2437 2438 if (issig(JUSTLOOKING) && issig(FORREAL)) 2439 return (SET_ERROR(EINTR)); 2440 2441 objerr = dmu_bonus_hold(os, obj, FTAG, &db); 2442 if (objerr != 0) 2443 continue; 2444 tx = dmu_tx_create(os); 2445 dmu_tx_hold_bonus(tx, obj); 2446 objerr = dmu_tx_assign(tx, TXG_WAIT); 2447 if (objerr != 0) { 2448 dmu_buf_rele(db, FTAG); 2449 dmu_tx_abort(tx); 2450 continue; 2451 } 2452 dmu_buf_will_dirty(db, tx); 2453 dmu_buf_rele(db, FTAG); 2454 dmu_tx_commit(tx); 2455 } 2456 return (0); 2457 } 2458 2459 static int 2460 dmu_objset_userspace_upgrade_cb(objset_t *os) 2461 { 2462 int err = 0; 2463 2464 if (dmu_objset_userspace_present(os)) 2465 return (0); 2466 if (dmu_objset_is_snapshot(os)) 2467 return (SET_ERROR(EINVAL)); 2468 if (!dmu_objset_userused_enabled(os)) 2469 return (SET_ERROR(ENOTSUP)); 2470 2471 err = dmu_objset_space_upgrade(os); 2472 if (err) 2473 return (err); 2474 2475 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2476 txg_wait_synced(dmu_objset_pool(os), 0); 2477 return (0); 2478 } 2479 2480 void 2481 dmu_objset_userspace_upgrade(objset_t *os) 2482 { 2483 dmu_objset_upgrade(os, dmu_objset_userspace_upgrade_cb); 2484 } 2485 2486 static int 2487 dmu_objset_id_quota_upgrade_cb(objset_t *os) 2488 { 2489 int err = 0; 2490 2491 if (dmu_objset_userobjspace_present(os) && 2492 dmu_objset_projectquota_present(os)) 2493 return (0); 2494 if (dmu_objset_is_snapshot(os)) 2495 return (SET_ERROR(EINVAL)); 2496 if (!dmu_objset_userused_enabled(os)) 2497 return (SET_ERROR(ENOTSUP)); 2498 if (!dmu_objset_projectquota_enabled(os) && 2499 dmu_objset_userobjspace_present(os)) 2500 return (SET_ERROR(ENOTSUP)); 2501 2502 if (dmu_objset_userobjused_enabled(os)) 2503 dmu_objset_ds(os)->ds_feature_activation[ 2504 SPA_FEATURE_USEROBJ_ACCOUNTING] = (void *)B_TRUE; 2505 if (dmu_objset_projectquota_enabled(os)) 2506 dmu_objset_ds(os)->ds_feature_activation[ 2507 SPA_FEATURE_PROJECT_QUOTA] = (void *)B_TRUE; 2508 2509 err = dmu_objset_space_upgrade(os); 2510 if (err) 2511 return (err); 2512 2513 os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 2514 if (dmu_objset_userobjused_enabled(os)) 2515 os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE; 2516 if (dmu_objset_projectquota_enabled(os)) 2517 os->os_flags |= OBJSET_FLAG_PROJECTQUOTA_COMPLETE; 2518 2519 txg_wait_synced(dmu_objset_pool(os), 0); 2520 return (0); 2521 } 2522 2523 void 2524 dmu_objset_id_quota_upgrade(objset_t *os) 2525 { 2526 dmu_objset_upgrade(os, dmu_objset_id_quota_upgrade_cb); 2527 } 2528 2529 boolean_t 2530 dmu_objset_userobjspace_upgradable(objset_t *os) 2531 { 2532 return (dmu_objset_type(os) == DMU_OST_ZFS && 2533 !dmu_objset_is_snapshot(os) && 2534 dmu_objset_userobjused_enabled(os) && 2535 !dmu_objset_userobjspace_present(os) && 2536 spa_writeable(dmu_objset_spa(os))); 2537 } 2538 2539 boolean_t 2540 dmu_objset_projectquota_upgradable(objset_t *os) 2541 { 2542 return (dmu_objset_type(os) == DMU_OST_ZFS && 2543 !dmu_objset_is_snapshot(os) && 2544 dmu_objset_projectquota_enabled(os) && 2545 !dmu_objset_projectquota_present(os) && 2546 spa_writeable(dmu_objset_spa(os))); 2547 } 2548 2549 void 2550 dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 2551 uint64_t *usedobjsp, uint64_t *availobjsp) 2552 { 2553 dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 2554 usedobjsp, availobjsp); 2555 } 2556 2557 uint64_t 2558 dmu_objset_fsid_guid(objset_t *os) 2559 { 2560 return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 2561 } 2562 2563 void 2564 dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 2565 { 2566 stat->dds_type = os->os_phys->os_type; 2567 if (os->os_dsl_dataset) 2568 dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 2569 } 2570 2571 void 2572 dmu_objset_stats(objset_t *os, nvlist_t *nv) 2573 { 2574 ASSERT(os->os_dsl_dataset || 2575 os->os_phys->os_type == DMU_OST_META); 2576 2577 if (os->os_dsl_dataset != NULL) 2578 dsl_dataset_stats(os->os_dsl_dataset, nv); 2579 2580 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 2581 os->os_phys->os_type); 2582 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 2583 dmu_objset_userspace_present(os)); 2584 } 2585 2586 int 2587 dmu_objset_is_snapshot(objset_t *os) 2588 { 2589 if (os->os_dsl_dataset != NULL) 2590 return (os->os_dsl_dataset->ds_is_snapshot); 2591 else 2592 return (B_FALSE); 2593 } 2594 2595 int 2596 dmu_snapshot_realname(objset_t *os, const char *name, char *real, int maxlen, 2597 boolean_t *conflict) 2598 { 2599 dsl_dataset_t *ds = os->os_dsl_dataset; 2600 uint64_t ignored; 2601 2602 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2603 return (SET_ERROR(ENOENT)); 2604 2605 return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 2606 dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored, 2607 MT_NORMALIZE, real, maxlen, conflict)); 2608 } 2609 2610 int 2611 dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 2612 uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 2613 { 2614 dsl_dataset_t *ds = os->os_dsl_dataset; 2615 zap_cursor_t cursor; 2616 zap_attribute_t attr; 2617 2618 ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 2619 2620 if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0) 2621 return (SET_ERROR(ENOENT)); 2622 2623 zap_cursor_init_serialized(&cursor, 2624 ds->ds_dir->dd_pool->dp_meta_objset, 2625 dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp); 2626 2627 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2628 zap_cursor_fini(&cursor); 2629 return (SET_ERROR(ENOENT)); 2630 } 2631 2632 if (strlen(attr.za_name) + 1 > namelen) { 2633 zap_cursor_fini(&cursor); 2634 return (SET_ERROR(ENAMETOOLONG)); 2635 } 2636 2637 (void) strlcpy(name, attr.za_name, namelen); 2638 if (idp) 2639 *idp = attr.za_first_integer; 2640 if (case_conflict) 2641 *case_conflict = attr.za_normalization_conflict; 2642 zap_cursor_advance(&cursor); 2643 *offp = zap_cursor_serialize(&cursor); 2644 zap_cursor_fini(&cursor); 2645 2646 return (0); 2647 } 2648 2649 int 2650 dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value) 2651 { 2652 return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value)); 2653 } 2654 2655 int 2656 dmu_dir_list_next(objset_t *os, int namelen, char *name, 2657 uint64_t *idp, uint64_t *offp) 2658 { 2659 dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 2660 zap_cursor_t cursor; 2661 zap_attribute_t attr; 2662 2663 /* there is no next dir on a snapshot! */ 2664 if (os->os_dsl_dataset->ds_object != 2665 dsl_dir_phys(dd)->dd_head_dataset_obj) 2666 return (SET_ERROR(ENOENT)); 2667 2668 zap_cursor_init_serialized(&cursor, 2669 dd->dd_pool->dp_meta_objset, 2670 dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp); 2671 2672 if (zap_cursor_retrieve(&cursor, &attr) != 0) { 2673 zap_cursor_fini(&cursor); 2674 return (SET_ERROR(ENOENT)); 2675 } 2676 2677 if (strlen(attr.za_name) + 1 > namelen) { 2678 zap_cursor_fini(&cursor); 2679 return (SET_ERROR(ENAMETOOLONG)); 2680 } 2681 2682 (void) strlcpy(name, attr.za_name, namelen); 2683 if (idp) 2684 *idp = attr.za_first_integer; 2685 zap_cursor_advance(&cursor); 2686 *offp = zap_cursor_serialize(&cursor); 2687 zap_cursor_fini(&cursor); 2688 2689 return (0); 2690 } 2691 2692 typedef struct dmu_objset_find_ctx { 2693 taskq_t *dc_tq; 2694 dsl_pool_t *dc_dp; 2695 uint64_t dc_ddobj; 2696 char *dc_ddname; /* last component of ddobj's name */ 2697 int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *); 2698 void *dc_arg; 2699 int dc_flags; 2700 kmutex_t *dc_error_lock; 2701 int *dc_error; 2702 } dmu_objset_find_ctx_t; 2703 2704 static void 2705 dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp) 2706 { 2707 dsl_pool_t *dp = dcp->dc_dp; 2708 dsl_dir_t *dd; 2709 dsl_dataset_t *ds; 2710 zap_cursor_t zc; 2711 zap_attribute_t *attr; 2712 uint64_t thisobj; 2713 int err = 0; 2714 2715 /* don't process if there already was an error */ 2716 if (*dcp->dc_error != 0) 2717 goto out; 2718 2719 /* 2720 * Note: passing the name (dc_ddname) here is optional, but it 2721 * improves performance because we don't need to call 2722 * zap_value_search() to determine the name. 2723 */ 2724 err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd); 2725 if (err != 0) 2726 goto out; 2727 2728 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2729 if (dd->dd_myname[0] == '$') { 2730 dsl_dir_rele(dd, FTAG); 2731 goto out; 2732 } 2733 2734 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2735 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2736 2737 /* 2738 * Iterate over all children. 2739 */ 2740 if (dcp->dc_flags & DS_FIND_CHILDREN) { 2741 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2742 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2743 zap_cursor_retrieve(&zc, attr) == 0; 2744 (void) zap_cursor_advance(&zc)) { 2745 ASSERT3U(attr->za_integer_length, ==, 2746 sizeof (uint64_t)); 2747 ASSERT3U(attr->za_num_integers, ==, 1); 2748 2749 dmu_objset_find_ctx_t *child_dcp = 2750 kmem_alloc(sizeof (*child_dcp), KM_SLEEP); 2751 *child_dcp = *dcp; 2752 child_dcp->dc_ddobj = attr->za_first_integer; 2753 child_dcp->dc_ddname = spa_strdup(attr->za_name); 2754 if (dcp->dc_tq != NULL) 2755 (void) taskq_dispatch(dcp->dc_tq, 2756 dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP); 2757 else 2758 dmu_objset_find_dp_impl(child_dcp); 2759 } 2760 zap_cursor_fini(&zc); 2761 } 2762 2763 /* 2764 * Iterate over all snapshots. 2765 */ 2766 if (dcp->dc_flags & DS_FIND_SNAPSHOTS) { 2767 dsl_dataset_t *ds; 2768 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2769 2770 if (err == 0) { 2771 uint64_t snapobj; 2772 2773 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 2774 dsl_dataset_rele(ds, FTAG); 2775 2776 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 2777 zap_cursor_retrieve(&zc, attr) == 0; 2778 (void) zap_cursor_advance(&zc)) { 2779 ASSERT3U(attr->za_integer_length, ==, 2780 sizeof (uint64_t)); 2781 ASSERT3U(attr->za_num_integers, ==, 1); 2782 2783 err = dsl_dataset_hold_obj(dp, 2784 attr->za_first_integer, FTAG, &ds); 2785 if (err != 0) 2786 break; 2787 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2788 dsl_dataset_rele(ds, FTAG); 2789 if (err != 0) 2790 break; 2791 } 2792 zap_cursor_fini(&zc); 2793 } 2794 } 2795 2796 kmem_free(attr, sizeof (zap_attribute_t)); 2797 2798 if (err != 0) { 2799 dsl_dir_rele(dd, FTAG); 2800 goto out; 2801 } 2802 2803 /* 2804 * Apply to self. 2805 */ 2806 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 2807 2808 /* 2809 * Note: we hold the dir while calling dsl_dataset_hold_obj() so 2810 * that the dir will remain cached, and we won't have to re-instantiate 2811 * it (which could be expensive due to finding its name via 2812 * zap_value_search()). 2813 */ 2814 dsl_dir_rele(dd, FTAG); 2815 if (err != 0) 2816 goto out; 2817 err = dcp->dc_func(dp, ds, dcp->dc_arg); 2818 dsl_dataset_rele(ds, FTAG); 2819 2820 out: 2821 if (err != 0) { 2822 mutex_enter(dcp->dc_error_lock); 2823 /* only keep first error */ 2824 if (*dcp->dc_error == 0) 2825 *dcp->dc_error = err; 2826 mutex_exit(dcp->dc_error_lock); 2827 } 2828 2829 if (dcp->dc_ddname != NULL) 2830 spa_strfree(dcp->dc_ddname); 2831 kmem_free(dcp, sizeof (*dcp)); 2832 } 2833 2834 static void 2835 dmu_objset_find_dp_cb(void *arg) 2836 { 2837 dmu_objset_find_ctx_t *dcp = arg; 2838 dsl_pool_t *dp = dcp->dc_dp; 2839 2840 /* 2841 * We need to get a pool_config_lock here, as there are several 2842 * assert(pool_config_held) down the stack. Getting a lock via 2843 * dsl_pool_config_enter is risky, as it might be stalled by a 2844 * pending writer. This would deadlock, as the write lock can 2845 * only be granted when our parent thread gives up the lock. 2846 * The _prio interface gives us priority over a pending writer. 2847 */ 2848 dsl_pool_config_enter_prio(dp, FTAG); 2849 2850 dmu_objset_find_dp_impl(dcp); 2851 2852 dsl_pool_config_exit(dp, FTAG); 2853 } 2854 2855 /* 2856 * Find objsets under and including ddobj, call func(ds) on each. 2857 * The order for the enumeration is completely undefined. 2858 * func is called with dsl_pool_config held. 2859 */ 2860 int 2861 dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 2862 int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 2863 { 2864 int error = 0; 2865 taskq_t *tq = NULL; 2866 int ntasks; 2867 dmu_objset_find_ctx_t *dcp; 2868 kmutex_t err_lock; 2869 2870 mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL); 2871 dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP); 2872 dcp->dc_tq = NULL; 2873 dcp->dc_dp = dp; 2874 dcp->dc_ddobj = ddobj; 2875 dcp->dc_ddname = NULL; 2876 dcp->dc_func = func; 2877 dcp->dc_arg = arg; 2878 dcp->dc_flags = flags; 2879 dcp->dc_error_lock = &err_lock; 2880 dcp->dc_error = &error; 2881 2882 if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) { 2883 /* 2884 * In case a write lock is held we can't make use of 2885 * parallelism, as down the stack of the worker threads 2886 * the lock is asserted via dsl_pool_config_held. 2887 * In case of a read lock this is solved by getting a read 2888 * lock in each worker thread, which isn't possible in case 2889 * of a writer lock. So we fall back to the synchronous path 2890 * here. 2891 * In the future it might be possible to get some magic into 2892 * dsl_pool_config_held in a way that it returns true for 2893 * the worker threads so that a single lock held from this 2894 * thread suffices. For now, stay single threaded. 2895 */ 2896 dmu_objset_find_dp_impl(dcp); 2897 mutex_destroy(&err_lock); 2898 2899 return (error); 2900 } 2901 2902 ntasks = dmu_find_threads; 2903 if (ntasks == 0) 2904 ntasks = vdev_count_leaves(dp->dp_spa) * 4; 2905 tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks, 2906 INT_MAX, 0); 2907 if (tq == NULL) { 2908 kmem_free(dcp, sizeof (*dcp)); 2909 mutex_destroy(&err_lock); 2910 2911 return (SET_ERROR(ENOMEM)); 2912 } 2913 dcp->dc_tq = tq; 2914 2915 /* dcp will be freed by task */ 2916 (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP); 2917 2918 /* 2919 * PORTING: this code relies on the property of taskq_wait to wait 2920 * until no more tasks are queued and no more tasks are active. As 2921 * we always queue new tasks from within other tasks, task_wait 2922 * reliably waits for the full recursion to finish, even though we 2923 * enqueue new tasks after taskq_wait has been called. 2924 * On platforms other than illumos, taskq_wait may not have this 2925 * property. 2926 */ 2927 taskq_wait(tq); 2928 taskq_destroy(tq); 2929 mutex_destroy(&err_lock); 2930 2931 return (error); 2932 } 2933 2934 /* 2935 * Find all objsets under name, and for each, call 'func(child_name, arg)'. 2936 * The dp_config_rwlock must not be held when this is called, and it 2937 * will not be held when the callback is called. 2938 * Therefore this function should only be used when the pool is not changing 2939 * (e.g. in syncing context), or the callback can deal with the possible races. 2940 */ 2941 static int 2942 dmu_objset_find_impl(spa_t *spa, const char *name, 2943 int func(const char *, void *), void *arg, int flags) 2944 { 2945 dsl_dir_t *dd; 2946 dsl_pool_t *dp = spa_get_dsl(spa); 2947 dsl_dataset_t *ds; 2948 zap_cursor_t zc; 2949 zap_attribute_t *attr; 2950 char *child; 2951 uint64_t thisobj; 2952 int err; 2953 2954 dsl_pool_config_enter(dp, FTAG); 2955 2956 err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 2957 if (err != 0) { 2958 dsl_pool_config_exit(dp, FTAG); 2959 return (err); 2960 } 2961 2962 /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 2963 if (dd->dd_myname[0] == '$') { 2964 dsl_dir_rele(dd, FTAG); 2965 dsl_pool_config_exit(dp, FTAG); 2966 return (0); 2967 } 2968 2969 thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj; 2970 attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 2971 2972 /* 2973 * Iterate over all children. 2974 */ 2975 if (flags & DS_FIND_CHILDREN) { 2976 for (zap_cursor_init(&zc, dp->dp_meta_objset, 2977 dsl_dir_phys(dd)->dd_child_dir_zapobj); 2978 zap_cursor_retrieve(&zc, attr) == 0; 2979 (void) zap_cursor_advance(&zc)) { 2980 ASSERT3U(attr->za_integer_length, ==, 2981 sizeof (uint64_t)); 2982 ASSERT3U(attr->za_num_integers, ==, 1); 2983 2984 child = kmem_asprintf("%s/%s", name, attr->za_name); 2985 dsl_pool_config_exit(dp, FTAG); 2986 err = dmu_objset_find_impl(spa, child, 2987 func, arg, flags); 2988 dsl_pool_config_enter(dp, FTAG); 2989 kmem_strfree(child); 2990 if (err != 0) 2991 break; 2992 } 2993 zap_cursor_fini(&zc); 2994 2995 if (err != 0) { 2996 dsl_dir_rele(dd, FTAG); 2997 dsl_pool_config_exit(dp, FTAG); 2998 kmem_free(attr, sizeof (zap_attribute_t)); 2999 return (err); 3000 } 3001 } 3002 3003 /* 3004 * Iterate over all snapshots. 3005 */ 3006 if (flags & DS_FIND_SNAPSHOTS) { 3007 err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 3008 3009 if (err == 0) { 3010 uint64_t snapobj; 3011 3012 snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 3013 dsl_dataset_rele(ds, FTAG); 3014 3015 for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 3016 zap_cursor_retrieve(&zc, attr) == 0; 3017 (void) zap_cursor_advance(&zc)) { 3018 ASSERT3U(attr->za_integer_length, ==, 3019 sizeof (uint64_t)); 3020 ASSERT3U(attr->za_num_integers, ==, 1); 3021 3022 child = kmem_asprintf("%s@%s", 3023 name, attr->za_name); 3024 dsl_pool_config_exit(dp, FTAG); 3025 err = func(child, arg); 3026 dsl_pool_config_enter(dp, FTAG); 3027 kmem_strfree(child); 3028 if (err != 0) 3029 break; 3030 } 3031 zap_cursor_fini(&zc); 3032 } 3033 } 3034 3035 dsl_dir_rele(dd, FTAG); 3036 kmem_free(attr, sizeof (zap_attribute_t)); 3037 dsl_pool_config_exit(dp, FTAG); 3038 3039 if (err != 0) 3040 return (err); 3041 3042 /* Apply to self. */ 3043 return (func(name, arg)); 3044 } 3045 3046 /* 3047 * See comment above dmu_objset_find_impl(). 3048 */ 3049 int 3050 dmu_objset_find(const char *name, int func(const char *, void *), void *arg, 3051 int flags) 3052 { 3053 spa_t *spa; 3054 int error; 3055 3056 error = spa_open(name, &spa, FTAG); 3057 if (error != 0) 3058 return (error); 3059 error = dmu_objset_find_impl(spa, name, func, arg, flags); 3060 spa_close(spa, FTAG); 3061 return (error); 3062 } 3063 3064 boolean_t 3065 dmu_objset_incompatible_encryption_version(objset_t *os) 3066 { 3067 return (dsl_dir_incompatible_encryption_version( 3068 os->os_dsl_dataset->ds_dir)); 3069 } 3070 3071 void 3072 dmu_objset_set_user(objset_t *os, void *user_ptr) 3073 { 3074 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 3075 os->os_user_ptr = user_ptr; 3076 } 3077 3078 void * 3079 dmu_objset_get_user(objset_t *os) 3080 { 3081 ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 3082 return (os->os_user_ptr); 3083 } 3084 3085 /* 3086 * Determine name of filesystem, given name of snapshot. 3087 * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes 3088 */ 3089 int 3090 dmu_fsname(const char *snapname, char *buf) 3091 { 3092 char *atp = strchr(snapname, '@'); 3093 if (atp == NULL) 3094 return (SET_ERROR(EINVAL)); 3095 if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) 3096 return (SET_ERROR(ENAMETOOLONG)); 3097 (void) strlcpy(buf, snapname, atp - snapname + 1); 3098 return (0); 3099 } 3100 3101 /* 3102 * Call when we think we're going to write/free space in open context 3103 * to track the amount of dirty data in the open txg, which is also the 3104 * amount of memory that can not be evicted until this txg syncs. 3105 * 3106 * Note that there are two conditions where this can be called from 3107 * syncing context: 3108 * 3109 * [1] When we just created the dataset, in which case we go on with 3110 * updating any accounting of dirty data as usual. 3111 * [2] When we are dirtying MOS data, in which case we only update the 3112 * pool's accounting of dirty data. 3113 */ 3114 void 3115 dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx) 3116 { 3117 dsl_dataset_t *ds = os->os_dsl_dataset; 3118 int64_t aspace = spa_get_worst_case_asize(os->os_spa, space); 3119 3120 if (ds != NULL) { 3121 dsl_dir_willuse_space(ds->ds_dir, aspace, tx); 3122 } 3123 3124 dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx); 3125 } 3126 3127 #if defined(_KERNEL) 3128 EXPORT_SYMBOL(dmu_objset_zil); 3129 EXPORT_SYMBOL(dmu_objset_pool); 3130 EXPORT_SYMBOL(dmu_objset_ds); 3131 EXPORT_SYMBOL(dmu_objset_type); 3132 EXPORT_SYMBOL(dmu_objset_name); 3133 EXPORT_SYMBOL(dmu_objset_hold); 3134 EXPORT_SYMBOL(dmu_objset_hold_flags); 3135 EXPORT_SYMBOL(dmu_objset_own); 3136 EXPORT_SYMBOL(dmu_objset_rele); 3137 EXPORT_SYMBOL(dmu_objset_rele_flags); 3138 EXPORT_SYMBOL(dmu_objset_disown); 3139 EXPORT_SYMBOL(dmu_objset_from_ds); 3140 EXPORT_SYMBOL(dmu_objset_create); 3141 EXPORT_SYMBOL(dmu_objset_clone); 3142 EXPORT_SYMBOL(dmu_objset_stats); 3143 EXPORT_SYMBOL(dmu_objset_fast_stat); 3144 EXPORT_SYMBOL(dmu_objset_spa); 3145 EXPORT_SYMBOL(dmu_objset_space); 3146 EXPORT_SYMBOL(dmu_objset_fsid_guid); 3147 EXPORT_SYMBOL(dmu_objset_find); 3148 EXPORT_SYMBOL(dmu_objset_byteswap); 3149 EXPORT_SYMBOL(dmu_objset_evict_dbufs); 3150 EXPORT_SYMBOL(dmu_objset_snap_cmtime); 3151 EXPORT_SYMBOL(dmu_objset_dnodesize); 3152 3153 EXPORT_SYMBOL(dmu_objset_sync); 3154 EXPORT_SYMBOL(dmu_objset_is_dirty); 3155 EXPORT_SYMBOL(dmu_objset_create_impl_dnstats); 3156 EXPORT_SYMBOL(dmu_objset_create_impl); 3157 EXPORT_SYMBOL(dmu_objset_open_impl); 3158 EXPORT_SYMBOL(dmu_objset_evict); 3159 EXPORT_SYMBOL(dmu_objset_register_type); 3160 EXPORT_SYMBOL(dmu_objset_sync_done); 3161 EXPORT_SYMBOL(dmu_objset_userquota_get_ids); 3162 EXPORT_SYMBOL(dmu_objset_userused_enabled); 3163 EXPORT_SYMBOL(dmu_objset_userspace_upgrade); 3164 EXPORT_SYMBOL(dmu_objset_userspace_present); 3165 EXPORT_SYMBOL(dmu_objset_userobjused_enabled); 3166 EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable); 3167 EXPORT_SYMBOL(dmu_objset_userobjspace_present); 3168 EXPORT_SYMBOL(dmu_objset_projectquota_enabled); 3169 EXPORT_SYMBOL(dmu_objset_projectquota_present); 3170 EXPORT_SYMBOL(dmu_objset_projectquota_upgradable); 3171 EXPORT_SYMBOL(dmu_objset_id_quota_upgrade); 3172 #endif 3173