1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23249643Smm * Copyright (c) 2013 by Delphix. All rights reserved. 24252140Sdelphij * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 25265754Sdelphij * Copyright (c) 2013, Joyent, Inc. All rights reserved. 26168404Spjd */ 27168404Spjd 28219089Spjd/* Portions Copyright 2010 Robert Milkowski */ 29219089Spjd 30185029Spjd#include <sys/cred.h> 31168404Spjd#include <sys/zfs_context.h> 32168404Spjd#include <sys/dmu_objset.h> 33168404Spjd#include <sys/dsl_dir.h> 34168404Spjd#include <sys/dsl_dataset.h> 35168404Spjd#include <sys/dsl_prop.h> 36168404Spjd#include <sys/dsl_pool.h> 37168404Spjd#include <sys/dsl_synctask.h> 38185029Spjd#include <sys/dsl_deleg.h> 39168404Spjd#include <sys/dnode.h> 40168404Spjd#include <sys/dbuf.h> 41168404Spjd#include <sys/zvol.h> 42168404Spjd#include <sys/dmu_tx.h> 43168404Spjd#include <sys/zap.h> 44168404Spjd#include <sys/zil.h> 45168404Spjd#include <sys/dmu_impl.h> 46185029Spjd#include <sys/zfs_ioctl.h> 47219089Spjd#include <sys/sa.h> 48219089Spjd#include <sys/zfs_onexit.h> 49249643Smm#include <sys/dsl_destroy.h> 50168404Spjd 51219089Spjd/* 52219089Spjd * Needed to close a window in dnode_move() that allows the objset to be freed 53219089Spjd * before it can be safely accessed. 54219089Spjd */ 55219089Spjdkrwlock_t os_lock; 56219089Spjd 57219089Spjdvoid 58219089Spjddmu_objset_init(void) 59219089Spjd{ 60219089Spjd rw_init(&os_lock, NULL, RW_DEFAULT, NULL); 61219089Spjd} 62219089Spjd 63219089Spjdvoid 64219089Spjddmu_objset_fini(void) 65219089Spjd{ 66219089Spjd rw_destroy(&os_lock); 67219089Spjd} 68219089Spjd 69168404Spjdspa_t * 70168404Spjddmu_objset_spa(objset_t *os) 71168404Spjd{ 72219089Spjd return (os->os_spa); 73168404Spjd} 74168404Spjd 75168404Spjdzilog_t * 76168404Spjddmu_objset_zil(objset_t *os) 77168404Spjd{ 78219089Spjd return (os->os_zil); 79168404Spjd} 80168404Spjd 81168404Spjddsl_pool_t * 82168404Spjddmu_objset_pool(objset_t *os) 83168404Spjd{ 84168404Spjd dsl_dataset_t *ds; 85168404Spjd 86219089Spjd if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir) 87168404Spjd return (ds->ds_dir->dd_pool); 88168404Spjd else 89219089Spjd return (spa_get_dsl(os->os_spa)); 90168404Spjd} 91168404Spjd 92168404Spjddsl_dataset_t * 93168404Spjddmu_objset_ds(objset_t *os) 94168404Spjd{ 95219089Spjd return (os->os_dsl_dataset); 96168404Spjd} 97168404Spjd 98168404Spjddmu_objset_type_t 99168404Spjddmu_objset_type(objset_t *os) 100168404Spjd{ 101219089Spjd return (os->os_phys->os_type); 102168404Spjd} 103168404Spjd 104168404Spjdvoid 105168404Spjddmu_objset_name(objset_t *os, char *buf) 106168404Spjd{ 107219089Spjd dsl_dataset_name(os->os_dsl_dataset, buf); 108168404Spjd} 109168404Spjd 110168404Spjduint64_t 111168404Spjddmu_objset_id(objset_t *os) 112168404Spjd{ 113219089Spjd dsl_dataset_t *ds = os->os_dsl_dataset; 114168404Spjd 115168404Spjd return (ds ? ds->ds_object : 0); 116168404Spjd} 117168404Spjd 118219089Spjduint64_t 119219089Spjddmu_objset_syncprop(objset_t *os) 120219089Spjd{ 121219089Spjd return (os->os_sync); 122219089Spjd} 123219089Spjd 124219089Spjduint64_t 125219089Spjddmu_objset_logbias(objset_t *os) 126219089Spjd{ 127219089Spjd return (os->os_logbias); 128219089Spjd} 129219089Spjd 130168404Spjdstatic void 131168404Spjdchecksum_changed_cb(void *arg, uint64_t newval) 132168404Spjd{ 133219089Spjd objset_t *os = arg; 134168404Spjd 135168404Spjd /* 136168404Spjd * Inheritance should have been done by now. 137168404Spjd */ 138168404Spjd ASSERT(newval != ZIO_CHECKSUM_INHERIT); 139168404Spjd 140219089Spjd os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 141168404Spjd} 142168404Spjd 143168404Spjdstatic void 144168404Spjdcompression_changed_cb(void *arg, uint64_t newval) 145168404Spjd{ 146219089Spjd objset_t *os = arg; 147168404Spjd 148168404Spjd /* 149168404Spjd * Inheritance and range checking should have been done by now. 150168404Spjd */ 151168404Spjd ASSERT(newval != ZIO_COMPRESS_INHERIT); 152168404Spjd 153219089Spjd os->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE); 154168404Spjd} 155168404Spjd 156168404Spjdstatic void 157168404Spjdcopies_changed_cb(void *arg, uint64_t newval) 158168404Spjd{ 159219089Spjd objset_t *os = arg; 160168404Spjd 161168404Spjd /* 162168404Spjd * Inheritance and range checking should have been done by now. 163168404Spjd */ 164168404Spjd ASSERT(newval > 0); 165219089Spjd ASSERT(newval <= spa_max_replication(os->os_spa)); 166168404Spjd 167219089Spjd os->os_copies = newval; 168168404Spjd} 169168404Spjd 170185029Spjdstatic void 171219089Spjddedup_changed_cb(void *arg, uint64_t newval) 172219089Spjd{ 173219089Spjd objset_t *os = arg; 174219089Spjd spa_t *spa = os->os_spa; 175219089Spjd enum zio_checksum checksum; 176219089Spjd 177219089Spjd /* 178219089Spjd * Inheritance should have been done by now. 179219089Spjd */ 180219089Spjd ASSERT(newval != ZIO_CHECKSUM_INHERIT); 181219089Spjd 182219089Spjd checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF); 183219089Spjd 184219089Spjd os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK; 185219089Spjd os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY); 186219089Spjd} 187219089Spjd 188219089Spjdstatic void 189185029Spjdprimary_cache_changed_cb(void *arg, uint64_t newval) 190185029Spjd{ 191219089Spjd objset_t *os = arg; 192185029Spjd 193185029Spjd /* 194185029Spjd * Inheritance and range checking should have been done by now. 195185029Spjd */ 196185029Spjd ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 197185029Spjd newval == ZFS_CACHE_METADATA); 198185029Spjd 199219089Spjd os->os_primary_cache = newval; 200185029Spjd} 201185029Spjd 202185029Spjdstatic void 203185029Spjdsecondary_cache_changed_cb(void *arg, uint64_t newval) 204185029Spjd{ 205219089Spjd objset_t *os = arg; 206185029Spjd 207185029Spjd /* 208185029Spjd * Inheritance and range checking should have been done by now. 209185029Spjd */ 210185029Spjd ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE || 211185029Spjd newval == ZFS_CACHE_METADATA); 212185029Spjd 213219089Spjd os->os_secondary_cache = newval; 214185029Spjd} 215185029Spjd 216219089Spjdstatic void 217219089Spjdsync_changed_cb(void *arg, uint64_t newval) 218219089Spjd{ 219219089Spjd objset_t *os = arg; 220219089Spjd 221219089Spjd /* 222219089Spjd * Inheritance and range checking should have been done by now. 223219089Spjd */ 224219089Spjd ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS || 225219089Spjd newval == ZFS_SYNC_DISABLED); 226219089Spjd 227219089Spjd os->os_sync = newval; 228219089Spjd if (os->os_zil) 229219089Spjd zil_set_sync(os->os_zil, newval); 230219089Spjd} 231219089Spjd 232219089Spjdstatic void 233219089Spjdlogbias_changed_cb(void *arg, uint64_t newval) 234219089Spjd{ 235219089Spjd objset_t *os = arg; 236219089Spjd 237219089Spjd ASSERT(newval == ZFS_LOGBIAS_LATENCY || 238219089Spjd newval == ZFS_LOGBIAS_THROUGHPUT); 239219089Spjd os->os_logbias = newval; 240219089Spjd if (os->os_zil) 241219089Spjd zil_set_logbias(os->os_zil, newval); 242219089Spjd} 243219089Spjd 244168404Spjdvoid 245168404Spjddmu_objset_byteswap(void *buf, size_t size) 246168404Spjd{ 247168404Spjd objset_phys_t *osp = buf; 248168404Spjd 249209962Smm ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t)); 250168404Spjd dnode_byteswap(&osp->os_meta_dnode); 251168404Spjd byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 252168404Spjd osp->os_type = BSWAP_64(osp->os_type); 253209962Smm osp->os_flags = BSWAP_64(osp->os_flags); 254209962Smm if (size == sizeof (objset_phys_t)) { 255209962Smm dnode_byteswap(&osp->os_userused_dnode); 256209962Smm dnode_byteswap(&osp->os_groupused_dnode); 257209962Smm } 258168404Spjd} 259168404Spjd 260168404Spjdint 261168404Spjddmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 262219089Spjd objset_t **osp) 263168404Spjd{ 264219089Spjd objset_t *os; 265185029Spjd int i, err; 266168404Spjd 267185029Spjd ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 268185029Spjd 269219089Spjd os = kmem_zalloc(sizeof (objset_t), KM_SLEEP); 270219089Spjd os->os_dsl_dataset = ds; 271219089Spjd os->os_spa = spa; 272219089Spjd os->os_rootbp = bp; 273219089Spjd if (!BP_IS_HOLE(os->os_rootbp)) { 274168404Spjd uint32_t aflags = ARC_WAIT; 275168404Spjd zbookmark_t zb; 276219089Spjd SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET, 277219089Spjd ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 278219089Spjd 279219089Spjd if (DMU_OS_IS_L2CACHEABLE(os)) 280185029Spjd aflags |= ARC_L2CACHE; 281252140Sdelphij if (DMU_OS_IS_L2COMPRESSIBLE(os)) 282252140Sdelphij aflags |= ARC_L2COMPRESS; 283168404Spjd 284219089Spjd dprintf_bp(os->os_rootbp, "reading %s", ""); 285247406Smm err = arc_read(NULL, spa, os->os_rootbp, 286219089Spjd arc_getbuf_func, &os->os_phys_buf, 287168404Spjd ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb); 288249643Smm if (err != 0) { 289219089Spjd kmem_free(os, sizeof (objset_t)); 290185029Spjd /* convert checksum errors into IO errors */ 291185029Spjd if (err == ECKSUM) 292249643Smm err = SET_ERROR(EIO); 293168404Spjd return (err); 294168404Spjd } 295209962Smm 296209962Smm /* Increase the blocksize if we are permitted. */ 297209962Smm if (spa_version(spa) >= SPA_VERSION_USERSPACE && 298219089Spjd arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) { 299209962Smm arc_buf_t *buf = arc_buf_alloc(spa, 300219089Spjd sizeof (objset_phys_t), &os->os_phys_buf, 301209962Smm ARC_BUFC_METADATA); 302209962Smm bzero(buf->b_data, sizeof (objset_phys_t)); 303219089Spjd bcopy(os->os_phys_buf->b_data, buf->b_data, 304219089Spjd arc_buf_size(os->os_phys_buf)); 305219089Spjd (void) arc_buf_remove_ref(os->os_phys_buf, 306219089Spjd &os->os_phys_buf); 307219089Spjd os->os_phys_buf = buf; 308209962Smm } 309209962Smm 310219089Spjd os->os_phys = os->os_phys_buf->b_data; 311219089Spjd os->os_flags = os->os_phys->os_flags; 312168404Spjd } else { 313209962Smm int size = spa_version(spa) >= SPA_VERSION_USERSPACE ? 314209962Smm sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE; 315219089Spjd os->os_phys_buf = arc_buf_alloc(spa, size, 316219089Spjd &os->os_phys_buf, ARC_BUFC_METADATA); 317219089Spjd os->os_phys = os->os_phys_buf->b_data; 318219089Spjd bzero(os->os_phys, size); 319168404Spjd } 320168404Spjd 321168404Spjd /* 322168404Spjd * Note: the changed_cb will be called once before the register 323168404Spjd * func returns, thus changing the checksum/compression from the 324185029Spjd * default (fletcher2/off). Snapshots don't need to know about 325185029Spjd * checksum/compression/copies. 326168404Spjd */ 327185029Spjd if (ds) { 328249643Smm err = dsl_prop_register(ds, 329249643Smm zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 330219089Spjd primary_cache_changed_cb, os); 331249643Smm if (err == 0) { 332249643Smm err = dsl_prop_register(ds, 333249643Smm zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 334219089Spjd secondary_cache_changed_cb, os); 335249643Smm } 336185029Spjd if (!dsl_dataset_is_snapshot(ds)) { 337249643Smm if (err == 0) { 338249643Smm err = dsl_prop_register(ds, 339249643Smm zfs_prop_to_name(ZFS_PROP_CHECKSUM), 340219089Spjd checksum_changed_cb, os); 341249643Smm } 342249643Smm if (err == 0) { 343249643Smm err = dsl_prop_register(ds, 344249643Smm zfs_prop_to_name(ZFS_PROP_COMPRESSION), 345219089Spjd compression_changed_cb, os); 346249643Smm } 347249643Smm if (err == 0) { 348249643Smm err = dsl_prop_register(ds, 349249643Smm zfs_prop_to_name(ZFS_PROP_COPIES), 350219089Spjd copies_changed_cb, os); 351249643Smm } 352249643Smm if (err == 0) { 353249643Smm err = dsl_prop_register(ds, 354249643Smm zfs_prop_to_name(ZFS_PROP_DEDUP), 355219089Spjd dedup_changed_cb, os); 356249643Smm } 357249643Smm if (err == 0) { 358249643Smm err = dsl_prop_register(ds, 359249643Smm zfs_prop_to_name(ZFS_PROP_LOGBIAS), 360219089Spjd logbias_changed_cb, os); 361249643Smm } 362249643Smm if (err == 0) { 363249643Smm err = dsl_prop_register(ds, 364249643Smm zfs_prop_to_name(ZFS_PROP_SYNC), 365219089Spjd sync_changed_cb, os); 366249643Smm } 367185029Spjd } 368249643Smm if (err != 0) { 369219089Spjd VERIFY(arc_buf_remove_ref(os->os_phys_buf, 370249643Smm &os->os_phys_buf)); 371219089Spjd kmem_free(os, sizeof (objset_t)); 372168404Spjd return (err); 373168404Spjd } 374168404Spjd } else if (ds == NULL) { 375168404Spjd /* It's the meta-objset. */ 376219089Spjd os->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 377219089Spjd os->os_compress = ZIO_COMPRESS_LZJB; 378219089Spjd os->os_copies = spa_max_replication(spa); 379219089Spjd os->os_dedup_checksum = ZIO_CHECKSUM_OFF; 380219089Spjd os->os_dedup_verify = 0; 381219089Spjd os->os_logbias = 0; 382219089Spjd os->os_sync = 0; 383219089Spjd os->os_primary_cache = ZFS_CACHE_ALL; 384219089Spjd os->os_secondary_cache = ZFS_CACHE_ALL; 385168404Spjd } 386168404Spjd 387219089Spjd if (ds == NULL || !dsl_dataset_is_snapshot(ds)) 388219089Spjd os->os_zil_header = os->os_phys->os_zil_header; 389219089Spjd os->os_zil = zil_alloc(os, &os->os_zil_header); 390168404Spjd 391168404Spjd for (i = 0; i < TXG_SIZE; i++) { 392219089Spjd list_create(&os->os_dirty_dnodes[i], sizeof (dnode_t), 393168404Spjd offsetof(dnode_t, dn_dirty_link[i])); 394219089Spjd list_create(&os->os_free_dnodes[i], sizeof (dnode_t), 395168404Spjd offsetof(dnode_t, dn_dirty_link[i])); 396168404Spjd } 397219089Spjd list_create(&os->os_dnodes, sizeof (dnode_t), 398168404Spjd offsetof(dnode_t, dn_link)); 399219089Spjd list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 400168404Spjd offsetof(dmu_buf_impl_t, db_link)); 401168404Spjd 402219089Spjd mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL); 403219089Spjd mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 404219089Spjd mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 405168404Spjd 406219089Spjd DMU_META_DNODE(os) = dnode_special_open(os, 407219089Spjd &os->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT, 408219089Spjd &os->os_meta_dnode); 409219089Spjd if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) { 410219089Spjd DMU_USERUSED_DNODE(os) = dnode_special_open(os, 411219089Spjd &os->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT, 412219089Spjd &os->os_userused_dnode); 413219089Spjd DMU_GROUPUSED_DNODE(os) = dnode_special_open(os, 414219089Spjd &os->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT, 415219089Spjd &os->os_groupused_dnode); 416209962Smm } 417168404Spjd 418185029Spjd /* 419185029Spjd * We should be the only thread trying to do this because we 420185029Spjd * have ds_opening_lock 421185029Spjd */ 422185029Spjd if (ds) { 423219089Spjd mutex_enter(&ds->ds_lock); 424219089Spjd ASSERT(ds->ds_objset == NULL); 425219089Spjd ds->ds_objset = os; 426219089Spjd mutex_exit(&ds->ds_lock); 427168404Spjd } 428168404Spjd 429219089Spjd *osp = os; 430168404Spjd return (0); 431168404Spjd} 432168404Spjd 433219089Spjdint 434219089Spjddmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp) 435168404Spjd{ 436219089Spjd int err = 0; 437168404Spjd 438185029Spjd mutex_enter(&ds->ds_opening_lock); 439219089Spjd *osp = ds->ds_objset; 440219089Spjd if (*osp == NULL) { 441168404Spjd err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 442219089Spjd ds, dsl_dataset_get_blkptr(ds), osp); 443168404Spjd } 444185029Spjd mutex_exit(&ds->ds_opening_lock); 445219089Spjd return (err); 446168404Spjd} 447168404Spjd 448249643Smm/* 449249643Smm * Holds the pool while the objset is held. Therefore only one objset 450249643Smm * can be held at a time. 451249643Smm */ 452185029Spjdint 453219089Spjddmu_objset_hold(const char *name, void *tag, objset_t **osp) 454185029Spjd{ 455249643Smm dsl_pool_t *dp; 456219089Spjd dsl_dataset_t *ds; 457185029Spjd int err; 458185029Spjd 459249643Smm err = dsl_pool_hold(name, tag, &dp); 460249643Smm if (err != 0) 461219089Spjd return (err); 462249643Smm err = dsl_dataset_hold(dp, name, tag, &ds); 463249643Smm if (err != 0) { 464249643Smm dsl_pool_rele(dp, tag); 465249643Smm return (err); 466249643Smm } 467219089Spjd 468219089Spjd err = dmu_objset_from_ds(ds, osp); 469249643Smm if (err != 0) { 470219089Spjd dsl_dataset_rele(ds, tag); 471249643Smm dsl_pool_rele(dp, tag); 472249643Smm } 473219089Spjd 474185029Spjd return (err); 475185029Spjd} 476185029Spjd 477249643Smm/* 478249643Smm * dsl_pool must not be held when this is called. 479249643Smm * Upon successful return, there will be a longhold on the dataset, 480249643Smm * and the dsl_pool will not be held. 481249643Smm */ 482185029Spjdint 483219089Spjddmu_objset_own(const char *name, dmu_objset_type_t type, 484219089Spjd boolean_t readonly, void *tag, objset_t **osp) 485185029Spjd{ 486249643Smm dsl_pool_t *dp; 487185029Spjd dsl_dataset_t *ds; 488185029Spjd int err; 489185029Spjd 490249643Smm err = dsl_pool_hold(name, FTAG, &dp); 491249643Smm if (err != 0) 492185029Spjd return (err); 493249643Smm err = dsl_dataset_own(dp, name, tag, &ds); 494249643Smm if (err != 0) { 495249643Smm dsl_pool_rele(dp, FTAG); 496249643Smm return (err); 497249643Smm } 498185029Spjd 499219089Spjd err = dmu_objset_from_ds(ds, osp); 500249643Smm dsl_pool_rele(dp, FTAG); 501249643Smm if (err != 0) { 502219089Spjd dsl_dataset_disown(ds, tag); 503219089Spjd } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) { 504249643Smm dsl_dataset_disown(ds, tag); 505249643Smm return (SET_ERROR(EINVAL)); 506219089Spjd } else if (!readonly && dsl_dataset_is_snapshot(ds)) { 507249643Smm dsl_dataset_disown(ds, tag); 508249643Smm return (SET_ERROR(EROFS)); 509185029Spjd } 510185029Spjd return (err); 511185029Spjd} 512185029Spjd 513168404Spjdvoid 514219089Spjddmu_objset_rele(objset_t *os, void *tag) 515168404Spjd{ 516249643Smm dsl_pool_t *dp = dmu_objset_pool(os); 517219089Spjd dsl_dataset_rele(os->os_dsl_dataset, tag); 518249643Smm dsl_pool_rele(dp, tag); 519219089Spjd} 520185029Spjd 521257119Sdelphij/* 522257119Sdelphij * When we are called, os MUST refer to an objset associated with a dataset 523257119Sdelphij * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner 524257119Sdelphij * == tag. We will then release and reacquire ownership of the dataset while 525257119Sdelphij * holding the pool config_rwlock to avoid intervening namespace or ownership 526257119Sdelphij * changes may occur. 527257119Sdelphij * 528257119Sdelphij * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to 529257119Sdelphij * release the hold on its dataset and acquire a new one on the dataset of the 530257119Sdelphij * same name so that it can be partially torn down and reconstructed. 531257119Sdelphij */ 532219089Spjdvoid 533257119Sdelphijdmu_objset_refresh_ownership(objset_t *os, void *tag) 534257119Sdelphij{ 535257119Sdelphij dsl_pool_t *dp; 536257119Sdelphij dsl_dataset_t *ds, *newds; 537257119Sdelphij char name[MAXNAMELEN]; 538257119Sdelphij 539257119Sdelphij ds = os->os_dsl_dataset; 540257119Sdelphij VERIFY3P(ds, !=, NULL); 541257119Sdelphij VERIFY3P(ds->ds_owner, ==, tag); 542257119Sdelphij VERIFY(dsl_dataset_long_held(ds)); 543257119Sdelphij 544257119Sdelphij dsl_dataset_name(ds, name); 545257119Sdelphij dp = dmu_objset_pool(os); 546257119Sdelphij dsl_pool_config_enter(dp, FTAG); 547257119Sdelphij dmu_objset_disown(os, tag); 548257119Sdelphij VERIFY0(dsl_dataset_own(dp, name, tag, &newds)); 549257119Sdelphij VERIFY3P(newds, ==, os->os_dsl_dataset); 550257119Sdelphij dsl_pool_config_exit(dp, FTAG); 551257119Sdelphij} 552257119Sdelphij 553257119Sdelphijvoid 554219089Spjddmu_objset_disown(objset_t *os, void *tag) 555219089Spjd{ 556219089Spjd dsl_dataset_disown(os->os_dsl_dataset, tag); 557168404Spjd} 558168404Spjd 559249643Smmvoid 560185029Spjddmu_objset_evict_dbufs(objset_t *os) 561168404Spjd{ 562168404Spjd dnode_t *dn; 563168404Spjd 564219089Spjd mutex_enter(&os->os_lock); 565168404Spjd 566168404Spjd /* process the mdn last, since the other dnodes have holds on it */ 567219089Spjd list_remove(&os->os_dnodes, DMU_META_DNODE(os)); 568219089Spjd list_insert_tail(&os->os_dnodes, DMU_META_DNODE(os)); 569168404Spjd 570168404Spjd /* 571168404Spjd * Find the first dnode with holds. We have to do this dance 572168404Spjd * because dnode_add_ref() only works if you already have a 573168404Spjd * hold. If there are no holds then it has no dbufs so OK to 574168404Spjd * skip. 575168404Spjd */ 576219089Spjd for (dn = list_head(&os->os_dnodes); 577185029Spjd dn && !dnode_add_ref(dn, FTAG); 578219089Spjd dn = list_next(&os->os_dnodes, dn)) 579168404Spjd continue; 580168404Spjd 581168404Spjd while (dn) { 582168404Spjd dnode_t *next_dn = dn; 583168404Spjd 584168404Spjd do { 585219089Spjd next_dn = list_next(&os->os_dnodes, next_dn); 586185029Spjd } while (next_dn && !dnode_add_ref(next_dn, FTAG)); 587168404Spjd 588219089Spjd mutex_exit(&os->os_lock); 589185029Spjd dnode_evict_dbufs(dn); 590168404Spjd dnode_rele(dn, FTAG); 591219089Spjd mutex_enter(&os->os_lock); 592168404Spjd dn = next_dn; 593168404Spjd } 594219089Spjd mutex_exit(&os->os_lock); 595168404Spjd} 596168404Spjd 597168404Spjdvoid 598219089Spjddmu_objset_evict(objset_t *os) 599168404Spjd{ 600219089Spjd dsl_dataset_t *ds = os->os_dsl_dataset; 601168404Spjd 602219089Spjd for (int t = 0; t < TXG_SIZE; t++) 603219089Spjd ASSERT(!dmu_objset_is_dirty(os, t)); 604168404Spjd 605185029Spjd if (ds) { 606185029Spjd if (!dsl_dataset_is_snapshot(ds)) { 607249643Smm VERIFY0(dsl_prop_unregister(ds, 608249643Smm zfs_prop_to_name(ZFS_PROP_CHECKSUM), 609219089Spjd checksum_changed_cb, os)); 610249643Smm VERIFY0(dsl_prop_unregister(ds, 611249643Smm zfs_prop_to_name(ZFS_PROP_COMPRESSION), 612219089Spjd compression_changed_cb, os)); 613249643Smm VERIFY0(dsl_prop_unregister(ds, 614249643Smm zfs_prop_to_name(ZFS_PROP_COPIES), 615219089Spjd copies_changed_cb, os)); 616249643Smm VERIFY0(dsl_prop_unregister(ds, 617249643Smm zfs_prop_to_name(ZFS_PROP_DEDUP), 618219089Spjd dedup_changed_cb, os)); 619249643Smm VERIFY0(dsl_prop_unregister(ds, 620249643Smm zfs_prop_to_name(ZFS_PROP_LOGBIAS), 621219089Spjd logbias_changed_cb, os)); 622249643Smm VERIFY0(dsl_prop_unregister(ds, 623249643Smm zfs_prop_to_name(ZFS_PROP_SYNC), 624219089Spjd sync_changed_cb, os)); 625185029Spjd } 626249643Smm VERIFY0(dsl_prop_unregister(ds, 627249643Smm zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), 628219089Spjd primary_cache_changed_cb, os)); 629249643Smm VERIFY0(dsl_prop_unregister(ds, 630249643Smm zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE), 631219089Spjd secondary_cache_changed_cb, os)); 632168404Spjd } 633168404Spjd 634219089Spjd if (os->os_sa) 635219089Spjd sa_tear_down(os); 636219089Spjd 637249643Smm dmu_objset_evict_dbufs(os); 638168404Spjd 639219089Spjd dnode_special_close(&os->os_meta_dnode); 640219089Spjd if (DMU_USERUSED_DNODE(os)) { 641219089Spjd dnode_special_close(&os->os_userused_dnode); 642219089Spjd dnode_special_close(&os->os_groupused_dnode); 643209962Smm } 644219089Spjd zil_free(os->os_zil); 645168404Spjd 646219089Spjd ASSERT3P(list_head(&os->os_dnodes), ==, NULL); 647209962Smm 648249643Smm VERIFY(arc_buf_remove_ref(os->os_phys_buf, &os->os_phys_buf)); 649219089Spjd 650219089Spjd /* 651219089Spjd * This is a barrier to prevent the objset from going away in 652219089Spjd * dnode_move() until we can safely ensure that the objset is still in 653219089Spjd * use. We consider the objset valid before the barrier and invalid 654219089Spjd * after the barrier. 655219089Spjd */ 656219089Spjd rw_enter(&os_lock, RW_READER); 657219089Spjd rw_exit(&os_lock); 658219089Spjd 659219089Spjd mutex_destroy(&os->os_lock); 660219089Spjd mutex_destroy(&os->os_obj_lock); 661219089Spjd mutex_destroy(&os->os_user_ptr_lock); 662219089Spjd kmem_free(os, sizeof (objset_t)); 663168404Spjd} 664168404Spjd 665219089Spjdtimestruc_t 666219089Spjddmu_objset_snap_cmtime(objset_t *os) 667219089Spjd{ 668219089Spjd return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir)); 669219089Spjd} 670219089Spjd 671168404Spjd/* called from dsl for meta-objset */ 672219089Spjdobjset_t * 673168404Spjddmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 674168404Spjd dmu_objset_type_t type, dmu_tx_t *tx) 675168404Spjd{ 676219089Spjd objset_t *os; 677168404Spjd dnode_t *mdn; 678168404Spjd 679168404Spjd ASSERT(dmu_tx_is_syncing(tx)); 680249643Smm 681219089Spjd if (ds != NULL) 682249643Smm VERIFY0(dmu_objset_from_ds(ds, &os)); 683219089Spjd else 684249643Smm VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os)); 685168404Spjd 686219089Spjd mdn = DMU_META_DNODE(os); 687219089Spjd 688168404Spjd dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT, 689168404Spjd DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx); 690168404Spjd 691168404Spjd /* 692168404Spjd * We don't want to have to increase the meta-dnode's nlevels 693168404Spjd * later, because then we could do it in quescing context while 694168404Spjd * we are also accessing it in open context. 695168404Spjd * 696168404Spjd * This precaution is not necessary for the MOS (ds == NULL), 697168404Spjd * because the MOS is only updated in syncing context. 698168404Spjd * This is most fortunate: the MOS is the only objset that 699168404Spjd * needs to be synced multiple times as spa_sync() iterates 700168404Spjd * to convergence, so minimizing its dn_nlevels matters. 701168404Spjd */ 702168404Spjd if (ds != NULL) { 703168404Spjd int levels = 1; 704168404Spjd 705168404Spjd /* 706168404Spjd * Determine the number of levels necessary for the meta-dnode 707168404Spjd * to contain DN_MAX_OBJECT dnodes. 708168404Spjd */ 709168404Spjd while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift + 710168404Spjd (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 711168404Spjd DN_MAX_OBJECT * sizeof (dnode_phys_t)) 712168404Spjd levels++; 713168404Spjd 714168404Spjd mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 715168404Spjd mdn->dn_nlevels = levels; 716168404Spjd } 717168404Spjd 718168404Spjd ASSERT(type != DMU_OST_NONE); 719168404Spjd ASSERT(type != DMU_OST_ANY); 720168404Spjd ASSERT(type < DMU_OST_NUMTYPES); 721219089Spjd os->os_phys->os_type = type; 722219089Spjd if (dmu_objset_userused_enabled(os)) { 723219089Spjd os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 724219089Spjd os->os_flags = os->os_phys->os_flags; 725209962Smm } 726168404Spjd 727168404Spjd dsl_dataset_dirty(ds, tx); 728168404Spjd 729219089Spjd return (os); 730168404Spjd} 731168404Spjd 732249643Smmtypedef struct dmu_objset_create_arg { 733249643Smm const char *doca_name; 734249643Smm cred_t *doca_cred; 735249643Smm void (*doca_userfunc)(objset_t *os, void *arg, 736249643Smm cred_t *cr, dmu_tx_t *tx); 737249643Smm void *doca_userarg; 738249643Smm dmu_objset_type_t doca_type; 739249643Smm uint64_t doca_flags; 740249643Smm} dmu_objset_create_arg_t; 741168404Spjd 742185029Spjd/*ARGSUSED*/ 743168404Spjdstatic int 744249643Smmdmu_objset_create_check(void *arg, dmu_tx_t *tx) 745168404Spjd{ 746249643Smm dmu_objset_create_arg_t *doca = arg; 747249643Smm dsl_pool_t *dp = dmu_tx_pool(tx); 748249643Smm dsl_dir_t *pdd; 749249643Smm const char *tail; 750249643Smm int error; 751168404Spjd 752249643Smm if (strchr(doca->doca_name, '@') != NULL) 753249643Smm return (SET_ERROR(EINVAL)); 754168404Spjd 755249643Smm error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); 756249643Smm if (error != 0) 757249643Smm return (error); 758249643Smm if (tail == NULL) { 759249643Smm dsl_dir_rele(pdd, FTAG); 760249643Smm return (SET_ERROR(EEXIST)); 761168404Spjd } 762265754Sdelphij error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 763265754Sdelphij doca->doca_cred); 764249643Smm dsl_dir_rele(pdd, FTAG); 765185029Spjd 766265754Sdelphij return (error); 767168404Spjd} 768168404Spjd 769168404Spjdstatic void 770249643Smmdmu_objset_create_sync(void *arg, dmu_tx_t *tx) 771168404Spjd{ 772249643Smm dmu_objset_create_arg_t *doca = arg; 773249643Smm dsl_pool_t *dp = dmu_tx_pool(tx); 774249643Smm dsl_dir_t *pdd; 775249643Smm const char *tail; 776249643Smm dsl_dataset_t *ds; 777219089Spjd uint64_t obj; 778249643Smm blkptr_t *bp; 779249643Smm objset_t *os; 780168404Spjd 781249643Smm VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail)); 782168404Spjd 783249643Smm obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags, 784249643Smm doca->doca_cred, tx); 785168404Spjd 786249643Smm VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 787249643Smm bp = dsl_dataset_get_blkptr(ds); 788249643Smm os = dmu_objset_create_impl(pdd->dd_pool->dp_spa, 789249643Smm ds, bp, doca->doca_type, tx); 790168404Spjd 791249643Smm if (doca->doca_userfunc != NULL) { 792249643Smm doca->doca_userfunc(os, doca->doca_userarg, 793249643Smm doca->doca_cred, tx); 794168404Spjd } 795185029Spjd 796249643Smm spa_history_log_internal_ds(ds, "create", tx, ""); 797249643Smm dsl_dataset_rele(ds, FTAG); 798249643Smm dsl_dir_rele(pdd, FTAG); 799168404Spjd} 800168404Spjd 801168404Spjdint 802219089Spjddmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 803185029Spjd void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg) 804168404Spjd{ 805249643Smm dmu_objset_create_arg_t doca; 806168404Spjd 807249643Smm doca.doca_name = name; 808249643Smm doca.doca_cred = CRED(); 809249643Smm doca.doca_flags = flags; 810249643Smm doca.doca_userfunc = func; 811249643Smm doca.doca_userarg = arg; 812249643Smm doca.doca_type = type; 813168404Spjd 814249643Smm return (dsl_sync_task(name, 815249643Smm dmu_objset_create_check, dmu_objset_create_sync, &doca, 5)); 816168404Spjd} 817168404Spjd 818249643Smmtypedef struct dmu_objset_clone_arg { 819249643Smm const char *doca_clone; 820249643Smm const char *doca_origin; 821249643Smm cred_t *doca_cred; 822249643Smm} dmu_objset_clone_arg_t; 823249643Smm 824249643Smm/*ARGSUSED*/ 825249643Smmstatic int 826249643Smmdmu_objset_clone_check(void *arg, dmu_tx_t *tx) 827168404Spjd{ 828249643Smm dmu_objset_clone_arg_t *doca = arg; 829219089Spjd dsl_dir_t *pdd; 830219089Spjd const char *tail; 831249643Smm int error; 832249643Smm dsl_dataset_t *origin; 833249643Smm dsl_pool_t *dp = dmu_tx_pool(tx); 834168404Spjd 835249643Smm if (strchr(doca->doca_clone, '@') != NULL) 836249643Smm return (SET_ERROR(EINVAL)); 837249643Smm 838249643Smm error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); 839249643Smm if (error != 0) 840249643Smm return (error); 841219089Spjd if (tail == NULL) { 842249643Smm dsl_dir_rele(pdd, FTAG); 843249643Smm return (SET_ERROR(EEXIST)); 844168404Spjd } 845249643Smm /* You can't clone across pools. */ 846249643Smm if (pdd->dd_pool != dp) { 847249643Smm dsl_dir_rele(pdd, FTAG); 848249643Smm return (SET_ERROR(EXDEV)); 849168404Spjd } 850265754Sdelphij error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL, 851265754Sdelphij doca->doca_cred); 852265754Sdelphij if (error != 0) { 853265754Sdelphij dsl_dir_rele(pdd, FTAG); 854265754Sdelphij return (SET_ERROR(EDQUOT)); 855265754Sdelphij } 856249643Smm dsl_dir_rele(pdd, FTAG); 857185029Spjd 858249643Smm error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin); 859249643Smm if (error != 0) 860219089Spjd return (error); 861219089Spjd 862249643Smm /* You can't clone across pools. */ 863249643Smm if (origin->ds_dir->dd_pool != dp) { 864249643Smm dsl_dataset_rele(origin, FTAG); 865249643Smm return (SET_ERROR(EXDEV)); 866249643Smm } 867219089Spjd 868249643Smm /* You can only clone snapshots, not the head datasets. */ 869249643Smm if (!dsl_dataset_is_snapshot(origin)) { 870249643Smm dsl_dataset_rele(origin, FTAG); 871249643Smm return (SET_ERROR(EINVAL)); 872219089Spjd } 873249643Smm dsl_dataset_rele(origin, FTAG); 874249643Smm 875249643Smm return (0); 876209962Smm} 877209962Smm 878209962Smmstatic void 879249643Smmdmu_objset_clone_sync(void *arg, dmu_tx_t *tx) 880209962Smm{ 881249643Smm dmu_objset_clone_arg_t *doca = arg; 882249643Smm dsl_pool_t *dp = dmu_tx_pool(tx); 883249643Smm dsl_dir_t *pdd; 884249643Smm const char *tail; 885249643Smm dsl_dataset_t *origin, *ds; 886249643Smm uint64_t obj; 887249643Smm char namebuf[MAXNAMELEN]; 888209962Smm 889249643Smm VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); 890249643Smm VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); 891209962Smm 892249643Smm obj = dsl_dataset_create_sync(pdd, tail, origin, 0, 893249643Smm doca->doca_cred, tx); 894219089Spjd 895249643Smm VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds)); 896249643Smm dsl_dataset_name(origin, namebuf); 897249643Smm spa_history_log_internal_ds(ds, "clone", tx, 898249643Smm "origin=%s (%llu)", namebuf, origin->ds_object); 899249643Smm dsl_dataset_rele(ds, FTAG); 900249643Smm dsl_dataset_rele(origin, FTAG); 901249643Smm dsl_dir_rele(pdd, FTAG); 902209962Smm} 903209962Smm 904249643Smmint 905249643Smmdmu_objset_clone(const char *clone, const char *origin) 906168404Spjd{ 907249643Smm dmu_objset_clone_arg_t doca; 908168404Spjd 909249643Smm doca.doca_clone = clone; 910249643Smm doca.doca_origin = origin; 911249643Smm doca.doca_cred = CRED(); 912219089Spjd 913249643Smm return (dsl_sync_task(clone, 914249643Smm dmu_objset_clone_check, dmu_objset_clone_sync, &doca, 5)); 915168404Spjd} 916168404Spjd 917168404Spjdint 918249643Smmdmu_objset_snapshot_one(const char *fsname, const char *snapname) 919168404Spjd{ 920168404Spjd int err; 921249643Smm char *longsnap = kmem_asprintf("%s@%s", fsname, snapname); 922249643Smm nvlist_t *snaps = fnvlist_alloc(); 923168404Spjd 924249643Smm fnvlist_add_boolean(snaps, longsnap); 925249643Smm strfree(longsnap); 926249643Smm err = dsl_dataset_snapshot(snaps, NULL, NULL); 927249643Smm fnvlist_free(snaps); 928168404Spjd return (err); 929168404Spjd} 930168404Spjd 931168404Spjdstatic void 932209962Smmdmu_objset_sync_dnodes(list_t *list, list_t *newlist, dmu_tx_t *tx) 933168404Spjd{ 934168404Spjd dnode_t *dn; 935168404Spjd 936168404Spjd while (dn = list_head(list)) { 937168404Spjd ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 938168404Spjd ASSERT(dn->dn_dbuf->db_data_pending); 939168404Spjd /* 940209962Smm * Initialize dn_zio outside dnode_sync() because the 941209962Smm * meta-dnode needs to set it ouside dnode_sync(). 942168404Spjd */ 943168404Spjd dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 944168404Spjd ASSERT(dn->dn_zio); 945168404Spjd 946168404Spjd ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 947168404Spjd list_remove(list, dn); 948209962Smm 949209962Smm if (newlist) { 950209962Smm (void) dnode_add_ref(dn, newlist); 951209962Smm list_insert_tail(newlist, dn); 952209962Smm } 953209962Smm 954168404Spjd dnode_sync(dn, tx); 955168404Spjd } 956168404Spjd} 957168404Spjd 958168404Spjd/* ARGSUSED */ 959168404Spjdstatic void 960219089Spjddmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg) 961168404Spjd{ 962185029Spjd blkptr_t *bp = zio->io_bp; 963219089Spjd objset_t *os = arg; 964168404Spjd dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 965168404Spjd 966249643Smm ASSERT3P(bp, ==, os->os_rootbp); 967249643Smm ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); 968249643Smm ASSERT0(BP_GET_LEVEL(bp)); 969185029Spjd 970168404Spjd /* 971209962Smm * Update rootbp fill count: it should be the number of objects 972209962Smm * allocated in the object set (not counting the "special" 973209962Smm * objects that are stored in the objset_phys_t -- the meta 974209962Smm * dnode and user/group accounting objects). 975168404Spjd */ 976209962Smm bp->blk_fill = 0; 977185029Spjd for (int i = 0; i < dnp->dn_nblkptr; i++) 978168404Spjd bp->blk_fill += dnp->dn_blkptr[i].blk_fill; 979219089Spjd} 980168404Spjd 981219089Spjd/* ARGSUSED */ 982219089Spjdstatic void 983219089Spjddmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg) 984219089Spjd{ 985219089Spjd blkptr_t *bp = zio->io_bp; 986219089Spjd blkptr_t *bp_orig = &zio->io_bp_orig; 987219089Spjd objset_t *os = arg; 988219089Spjd 989185029Spjd if (zio->io_flags & ZIO_FLAG_IO_REWRITE) { 990219089Spjd ASSERT(BP_EQUAL(bp, bp_orig)); 991185029Spjd } else { 992219089Spjd dsl_dataset_t *ds = os->os_dsl_dataset; 993219089Spjd dmu_tx_t *tx = os->os_synctx; 994219089Spjd 995219089Spjd (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE); 996219089Spjd dsl_dataset_block_born(ds, bp, tx); 997168404Spjd } 998168404Spjd} 999168404Spjd 1000168404Spjd/* called from dsl */ 1001168404Spjdvoid 1002219089Spjddmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx) 1003168404Spjd{ 1004168404Spjd int txgoff; 1005168404Spjd zbookmark_t zb; 1006219089Spjd zio_prop_t zp; 1007168404Spjd zio_t *zio; 1008168404Spjd list_t *list; 1009209962Smm list_t *newlist = NULL; 1010168404Spjd dbuf_dirty_record_t *dr; 1011168404Spjd 1012168404Spjd dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg); 1013168404Spjd 1014168404Spjd ASSERT(dmu_tx_is_syncing(tx)); 1015168404Spjd /* XXX the write_done callback should really give us the tx... */ 1016168404Spjd os->os_synctx = tx; 1017168404Spjd 1018168404Spjd if (os->os_dsl_dataset == NULL) { 1019168404Spjd /* 1020168404Spjd * This is the MOS. If we have upgraded, 1021168404Spjd * spa_max_replication() could change, so reset 1022168404Spjd * os_copies here. 1023168404Spjd */ 1024168404Spjd os->os_copies = spa_max_replication(os->os_spa); 1025168404Spjd } 1026168404Spjd 1027168404Spjd /* 1028168404Spjd * Create the root block IO 1029168404Spjd */ 1030219089Spjd SET_BOOKMARK(&zb, os->os_dsl_dataset ? 1031219089Spjd os->os_dsl_dataset->ds_object : DMU_META_OBJSET, 1032219089Spjd ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 1033247406Smm arc_release(os->os_phys_buf, &os->os_phys_buf); 1034185029Spjd 1035219089Spjd dmu_write_policy(os, NULL, 0, 0, &zp); 1036185029Spjd 1037219089Spjd zio = arc_write(pio, os->os_spa, tx->tx_txg, 1038252140Sdelphij os->os_rootbp, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os), 1039252140Sdelphij DMU_OS_IS_L2COMPRESSIBLE(os), &zp, dmu_objset_write_ready, 1040260764Savg NULL, dmu_objset_write_done, os, ZIO_PRIORITY_ASYNC_WRITE, 1041252140Sdelphij ZIO_FLAG_MUSTSUCCEED, &zb); 1042185029Spjd 1043168404Spjd /* 1044209962Smm * Sync special dnodes - the parent IO for the sync is the root block 1045168404Spjd */ 1046219089Spjd DMU_META_DNODE(os)->dn_zio = zio; 1047219089Spjd dnode_sync(DMU_META_DNODE(os), tx); 1048168404Spjd 1049209962Smm os->os_phys->os_flags = os->os_flags; 1050209962Smm 1051219089Spjd if (DMU_USERUSED_DNODE(os) && 1052219089Spjd DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) { 1053219089Spjd DMU_USERUSED_DNODE(os)->dn_zio = zio; 1054219089Spjd dnode_sync(DMU_USERUSED_DNODE(os), tx); 1055219089Spjd DMU_GROUPUSED_DNODE(os)->dn_zio = zio; 1056219089Spjd dnode_sync(DMU_GROUPUSED_DNODE(os), tx); 1057209962Smm } 1058209962Smm 1059168404Spjd txgoff = tx->tx_txg & TXG_MASK; 1060168404Spjd 1061209962Smm if (dmu_objset_userused_enabled(os)) { 1062209962Smm newlist = &os->os_synced_dnodes; 1063209962Smm /* 1064209962Smm * We must create the list here because it uses the 1065209962Smm * dn_dirty_link[] of this txg. 1066209962Smm */ 1067209962Smm list_create(newlist, sizeof (dnode_t), 1068209962Smm offsetof(dnode_t, dn_dirty_link[txgoff])); 1069209962Smm } 1070168404Spjd 1071209962Smm dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx); 1072209962Smm dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx); 1073209962Smm 1074219089Spjd list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff]; 1075168404Spjd while (dr = list_head(list)) { 1076249643Smm ASSERT0(dr->dr_dbuf->db_level); 1077168404Spjd list_remove(list, dr); 1078168404Spjd if (dr->dr_zio) 1079168404Spjd zio_nowait(dr->dr_zio); 1080168404Spjd } 1081168404Spjd /* 1082168404Spjd * Free intent log blocks up to this tx. 1083168404Spjd */ 1084168404Spjd zil_sync(os->os_zil, tx); 1085185029Spjd os->os_phys->os_zil_header = os->os_zil_header; 1086168404Spjd zio_nowait(zio); 1087168404Spjd} 1088168404Spjd 1089219089Spjdboolean_t 1090219089Spjddmu_objset_is_dirty(objset_t *os, uint64_t txg) 1091219089Spjd{ 1092219089Spjd return (!list_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]) || 1093219089Spjd !list_is_empty(&os->os_free_dnodes[txg & TXG_MASK])); 1094219089Spjd} 1095219089Spjd 1096209962Smmstatic objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES]; 1097209962Smm 1098168404Spjdvoid 1099209962Smmdmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb) 1100209962Smm{ 1101209962Smm used_cbs[ost] = cb; 1102209962Smm} 1103209962Smm 1104209962Smmboolean_t 1105219089Spjddmu_objset_userused_enabled(objset_t *os) 1106209962Smm{ 1107209962Smm return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE && 1108219089Spjd used_cbs[os->os_phys->os_type] != NULL && 1109219089Spjd DMU_USERUSED_DNODE(os) != NULL); 1110209962Smm} 1111209962Smm 1112219089Spjdstatic void 1113219089Spjddo_userquota_update(objset_t *os, uint64_t used, uint64_t flags, 1114219089Spjd uint64_t user, uint64_t group, boolean_t subtract, dmu_tx_t *tx) 1115219089Spjd{ 1116219089Spjd if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) { 1117219089Spjd int64_t delta = DNODE_SIZE + used; 1118219089Spjd if (subtract) 1119219089Spjd delta = -delta; 1120219089Spjd VERIFY3U(0, ==, zap_increment_int(os, DMU_USERUSED_OBJECT, 1121219089Spjd user, delta, tx)); 1122219089Spjd VERIFY3U(0, ==, zap_increment_int(os, DMU_GROUPUSED_OBJECT, 1123219089Spjd group, delta, tx)); 1124219089Spjd } 1125219089Spjd} 1126219089Spjd 1127209962Smmvoid 1128219089Spjddmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx) 1129209962Smm{ 1130209962Smm dnode_t *dn; 1131209962Smm list_t *list = &os->os_synced_dnodes; 1132209962Smm 1133209962Smm ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os)); 1134209962Smm 1135209962Smm while (dn = list_head(list)) { 1136219089Spjd int flags; 1137209962Smm ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object)); 1138209962Smm ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE || 1139209962Smm dn->dn_phys->dn_flags & 1140209962Smm DNODE_FLAG_USERUSED_ACCOUNTED); 1141209962Smm 1142209962Smm /* Allocate the user/groupused objects if necessary. */ 1143219089Spjd if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) { 1144219089Spjd VERIFY(0 == zap_create_claim(os, 1145209962Smm DMU_USERUSED_OBJECT, 1146209962Smm DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 1147219089Spjd VERIFY(0 == zap_create_claim(os, 1148209962Smm DMU_GROUPUSED_OBJECT, 1149209962Smm DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx)); 1150209962Smm } 1151209962Smm 1152209962Smm /* 1153219089Spjd * We intentionally modify the zap object even if the 1154219089Spjd * net delta is zero. Otherwise 1155219089Spjd * the block of the zap obj could be shared between 1156219089Spjd * datasets but need to be different between them after 1157219089Spjd * a bprewrite. 1158209962Smm */ 1159219089Spjd 1160219089Spjd flags = dn->dn_id_flags; 1161219089Spjd ASSERT(flags); 1162219089Spjd if (flags & DN_ID_OLD_EXIST) { 1163219089Spjd do_userquota_update(os, dn->dn_oldused, dn->dn_oldflags, 1164219089Spjd dn->dn_olduid, dn->dn_oldgid, B_TRUE, tx); 1165209962Smm } 1166219089Spjd if (flags & DN_ID_NEW_EXIST) { 1167219089Spjd do_userquota_update(os, DN_USED_BYTES(dn->dn_phys), 1168219089Spjd dn->dn_phys->dn_flags, dn->dn_newuid, 1169219089Spjd dn->dn_newgid, B_FALSE, tx); 1170219089Spjd } 1171209962Smm 1172209962Smm mutex_enter(&dn->dn_mtx); 1173219089Spjd dn->dn_oldused = 0; 1174219089Spjd dn->dn_oldflags = 0; 1175219089Spjd if (dn->dn_id_flags & DN_ID_NEW_EXIST) { 1176219089Spjd dn->dn_olduid = dn->dn_newuid; 1177219089Spjd dn->dn_oldgid = dn->dn_newgid; 1178219089Spjd dn->dn_id_flags |= DN_ID_OLD_EXIST; 1179219089Spjd if (dn->dn_bonuslen == 0) 1180219089Spjd dn->dn_id_flags |= DN_ID_CHKED_SPILL; 1181219089Spjd else 1182219089Spjd dn->dn_id_flags |= DN_ID_CHKED_BONUS; 1183219089Spjd } 1184219089Spjd dn->dn_id_flags &= ~(DN_ID_NEW_EXIST); 1185209962Smm mutex_exit(&dn->dn_mtx); 1186209962Smm 1187209962Smm list_remove(list, dn); 1188209962Smm dnode_rele(dn, list); 1189209962Smm } 1190209962Smm} 1191209962Smm 1192219089Spjd/* 1193219089Spjd * Returns a pointer to data to find uid/gid from 1194219089Spjd * 1195219089Spjd * If a dirty record for transaction group that is syncing can't 1196219089Spjd * be found then NULL is returned. In the NULL case it is assumed 1197219089Spjd * the uid/gid aren't changing. 1198219089Spjd */ 1199219089Spjdstatic void * 1200219089Spjddmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx) 1201219089Spjd{ 1202219089Spjd dbuf_dirty_record_t *dr, **drp; 1203219089Spjd void *data; 1204219089Spjd 1205219089Spjd if (db->db_dirtycnt == 0) 1206219089Spjd return (db->db.db_data); /* Nothing is changing */ 1207219089Spjd 1208219089Spjd for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next) 1209219089Spjd if (dr->dr_txg == tx->tx_txg) 1210219089Spjd break; 1211219089Spjd 1212219089Spjd if (dr == NULL) { 1213219089Spjd data = NULL; 1214219089Spjd } else { 1215219089Spjd dnode_t *dn; 1216219089Spjd 1217219089Spjd DB_DNODE_ENTER(dr->dr_dbuf); 1218219089Spjd dn = DB_DNODE(dr->dr_dbuf); 1219219089Spjd 1220219089Spjd if (dn->dn_bonuslen == 0 && 1221219089Spjd dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID) 1222219089Spjd data = dr->dt.dl.dr_data->b_data; 1223219089Spjd else 1224219089Spjd data = dr->dt.dl.dr_data; 1225219089Spjd 1226219089Spjd DB_DNODE_EXIT(dr->dr_dbuf); 1227219089Spjd } 1228219089Spjd 1229219089Spjd return (data); 1230219089Spjd} 1231219089Spjd 1232219089Spjdvoid 1233219089Spjddmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx) 1234219089Spjd{ 1235219089Spjd objset_t *os = dn->dn_objset; 1236219089Spjd void *data = NULL; 1237219089Spjd dmu_buf_impl_t *db = NULL; 1238248369Smm uint64_t *user = NULL; 1239248369Smm uint64_t *group = NULL; 1240219089Spjd int flags = dn->dn_id_flags; 1241219089Spjd int error; 1242219089Spjd boolean_t have_spill = B_FALSE; 1243219089Spjd 1244219089Spjd if (!dmu_objset_userused_enabled(dn->dn_objset)) 1245219089Spjd return; 1246219089Spjd 1247219089Spjd if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST| 1248219089Spjd DN_ID_CHKED_SPILL))) 1249219089Spjd return; 1250219089Spjd 1251219089Spjd if (before && dn->dn_bonuslen != 0) 1252219089Spjd data = DN_BONUS(dn->dn_phys); 1253219089Spjd else if (!before && dn->dn_bonuslen != 0) { 1254219089Spjd if (dn->dn_bonus) { 1255219089Spjd db = dn->dn_bonus; 1256219089Spjd mutex_enter(&db->db_mtx); 1257219089Spjd data = dmu_objset_userquota_find_data(db, tx); 1258219089Spjd } else { 1259219089Spjd data = DN_BONUS(dn->dn_phys); 1260219089Spjd } 1261219089Spjd } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) { 1262219089Spjd int rf = 0; 1263219089Spjd 1264219089Spjd if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) 1265219089Spjd rf |= DB_RF_HAVESTRUCT; 1266219089Spjd error = dmu_spill_hold_by_dnode(dn, 1267219089Spjd rf | DB_RF_MUST_SUCCEED, 1268219089Spjd FTAG, (dmu_buf_t **)&db); 1269219089Spjd ASSERT(error == 0); 1270219089Spjd mutex_enter(&db->db_mtx); 1271219089Spjd data = (before) ? db->db.db_data : 1272219089Spjd dmu_objset_userquota_find_data(db, tx); 1273219089Spjd have_spill = B_TRUE; 1274219089Spjd } else { 1275219089Spjd mutex_enter(&dn->dn_mtx); 1276219089Spjd dn->dn_id_flags |= DN_ID_CHKED_BONUS; 1277219089Spjd mutex_exit(&dn->dn_mtx); 1278219089Spjd return; 1279219089Spjd } 1280219089Spjd 1281219089Spjd if (before) { 1282219089Spjd ASSERT(data); 1283219089Spjd user = &dn->dn_olduid; 1284219089Spjd group = &dn->dn_oldgid; 1285219089Spjd } else if (data) { 1286219089Spjd user = &dn->dn_newuid; 1287219089Spjd group = &dn->dn_newgid; 1288219089Spjd } 1289219089Spjd 1290219089Spjd /* 1291219089Spjd * Must always call the callback in case the object 1292219089Spjd * type has changed and that type isn't an object type to track 1293219089Spjd */ 1294219089Spjd error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data, 1295219089Spjd user, group); 1296219089Spjd 1297219089Spjd /* 1298219089Spjd * Preserve existing uid/gid when the callback can't determine 1299219089Spjd * what the new uid/gid are and the callback returned EEXIST. 1300219089Spjd * The EEXIST error tells us to just use the existing uid/gid. 1301219089Spjd * If we don't know what the old values are then just assign 1302219089Spjd * them to 0, since that is a new file being created. 1303219089Spjd */ 1304219089Spjd if (!before && data == NULL && error == EEXIST) { 1305219089Spjd if (flags & DN_ID_OLD_EXIST) { 1306219089Spjd dn->dn_newuid = dn->dn_olduid; 1307219089Spjd dn->dn_newgid = dn->dn_oldgid; 1308219089Spjd } else { 1309219089Spjd dn->dn_newuid = 0; 1310219089Spjd dn->dn_newgid = 0; 1311219089Spjd } 1312219089Spjd error = 0; 1313219089Spjd } 1314219089Spjd 1315219089Spjd if (db) 1316219089Spjd mutex_exit(&db->db_mtx); 1317219089Spjd 1318219089Spjd mutex_enter(&dn->dn_mtx); 1319219089Spjd if (error == 0 && before) 1320219089Spjd dn->dn_id_flags |= DN_ID_OLD_EXIST; 1321219089Spjd if (error == 0 && !before) 1322219089Spjd dn->dn_id_flags |= DN_ID_NEW_EXIST; 1323219089Spjd 1324219089Spjd if (have_spill) { 1325219089Spjd dn->dn_id_flags |= DN_ID_CHKED_SPILL; 1326219089Spjd } else { 1327219089Spjd dn->dn_id_flags |= DN_ID_CHKED_BONUS; 1328219089Spjd } 1329219089Spjd mutex_exit(&dn->dn_mtx); 1330219089Spjd if (have_spill) 1331219089Spjd dmu_buf_rele((dmu_buf_t *)db, FTAG); 1332219089Spjd} 1333219089Spjd 1334209962Smmboolean_t 1335209962Smmdmu_objset_userspace_present(objset_t *os) 1336209962Smm{ 1337219089Spjd return (os->os_phys->os_flags & 1338209962Smm OBJSET_FLAG_USERACCOUNTING_COMPLETE); 1339209962Smm} 1340209962Smm 1341209962Smmint 1342209962Smmdmu_objset_userspace_upgrade(objset_t *os) 1343209962Smm{ 1344209962Smm uint64_t obj; 1345209962Smm int err = 0; 1346209962Smm 1347209962Smm if (dmu_objset_userspace_present(os)) 1348209962Smm return (0); 1349219089Spjd if (!dmu_objset_userused_enabled(os)) 1350249643Smm return (SET_ERROR(ENOTSUP)); 1351209962Smm if (dmu_objset_is_snapshot(os)) 1352249643Smm return (SET_ERROR(EINVAL)); 1353209962Smm 1354209962Smm /* 1355209962Smm * We simply need to mark every object dirty, so that it will be 1356209962Smm * synced out and now accounted. If this is called 1357209962Smm * concurrently, or if we already did some work before crashing, 1358209962Smm * that's fine, since we track each object's accounted state 1359209962Smm * independently. 1360209962Smm */ 1361209962Smm 1362209962Smm for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) { 1363209962Smm dmu_tx_t *tx; 1364209962Smm dmu_buf_t *db; 1365209962Smm int objerr; 1366209962Smm 1367209962Smm if (issig(JUSTLOOKING) && issig(FORREAL)) 1368249643Smm return (SET_ERROR(EINTR)); 1369209962Smm 1370209962Smm objerr = dmu_bonus_hold(os, obj, FTAG, &db); 1371249643Smm if (objerr != 0) 1372209962Smm continue; 1373209962Smm tx = dmu_tx_create(os); 1374209962Smm dmu_tx_hold_bonus(tx, obj); 1375209962Smm objerr = dmu_tx_assign(tx, TXG_WAIT); 1376249643Smm if (objerr != 0) { 1377209962Smm dmu_tx_abort(tx); 1378209962Smm continue; 1379209962Smm } 1380209962Smm dmu_buf_will_dirty(db, tx); 1381209962Smm dmu_buf_rele(db, FTAG); 1382209962Smm dmu_tx_commit(tx); 1383209962Smm } 1384209962Smm 1385219089Spjd os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE; 1386209962Smm txg_wait_synced(dmu_objset_pool(os), 0); 1387209962Smm return (0); 1388209962Smm} 1389209962Smm 1390209962Smmvoid 1391168404Spjddmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 1392168404Spjd uint64_t *usedobjsp, uint64_t *availobjsp) 1393168404Spjd{ 1394219089Spjd dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp, 1395168404Spjd usedobjsp, availobjsp); 1396168404Spjd} 1397168404Spjd 1398168404Spjduint64_t 1399168404Spjddmu_objset_fsid_guid(objset_t *os) 1400168404Spjd{ 1401219089Spjd return (dsl_dataset_fsid_guid(os->os_dsl_dataset)); 1402168404Spjd} 1403168404Spjd 1404168404Spjdvoid 1405168404Spjddmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 1406168404Spjd{ 1407219089Spjd stat->dds_type = os->os_phys->os_type; 1408219089Spjd if (os->os_dsl_dataset) 1409219089Spjd dsl_dataset_fast_stat(os->os_dsl_dataset, stat); 1410168404Spjd} 1411168404Spjd 1412168404Spjdvoid 1413168404Spjddmu_objset_stats(objset_t *os, nvlist_t *nv) 1414168404Spjd{ 1415219089Spjd ASSERT(os->os_dsl_dataset || 1416219089Spjd os->os_phys->os_type == DMU_OST_META); 1417168404Spjd 1418219089Spjd if (os->os_dsl_dataset != NULL) 1419219089Spjd dsl_dataset_stats(os->os_dsl_dataset, nv); 1420168404Spjd 1421168404Spjd dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 1422219089Spjd os->os_phys->os_type); 1423209962Smm dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING, 1424209962Smm dmu_objset_userspace_present(os)); 1425168404Spjd} 1426168404Spjd 1427168404Spjdint 1428168404Spjddmu_objset_is_snapshot(objset_t *os) 1429168404Spjd{ 1430219089Spjd if (os->os_dsl_dataset != NULL) 1431219089Spjd return (dsl_dataset_is_snapshot(os->os_dsl_dataset)); 1432168404Spjd else 1433168404Spjd return (B_FALSE); 1434168404Spjd} 1435168404Spjd 1436168404Spjdint 1437185029Spjddmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen, 1438185029Spjd boolean_t *conflict) 1439185029Spjd{ 1440219089Spjd dsl_dataset_t *ds = os->os_dsl_dataset; 1441185029Spjd uint64_t ignored; 1442185029Spjd 1443185029Spjd if (ds->ds_phys->ds_snapnames_zapobj == 0) 1444249643Smm return (SET_ERROR(ENOENT)); 1445185029Spjd 1446185029Spjd return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset, 1447185029Spjd ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST, 1448185029Spjd real, maxlen, conflict)); 1449185029Spjd} 1450185029Spjd 1451185029Spjdint 1452168404Spjddmu_snapshot_list_next(objset_t *os, int namelen, char *name, 1453185029Spjd uint64_t *idp, uint64_t *offp, boolean_t *case_conflict) 1454168404Spjd{ 1455219089Spjd dsl_dataset_t *ds = os->os_dsl_dataset; 1456168404Spjd zap_cursor_t cursor; 1457168404Spjd zap_attribute_t attr; 1458168404Spjd 1459249643Smm ASSERT(dsl_pool_config_held(dmu_objset_pool(os))); 1460249643Smm 1461168404Spjd if (ds->ds_phys->ds_snapnames_zapobj == 0) 1462249643Smm return (SET_ERROR(ENOENT)); 1463168404Spjd 1464168404Spjd zap_cursor_init_serialized(&cursor, 1465168404Spjd ds->ds_dir->dd_pool->dp_meta_objset, 1466168404Spjd ds->ds_phys->ds_snapnames_zapobj, *offp); 1467168404Spjd 1468168404Spjd if (zap_cursor_retrieve(&cursor, &attr) != 0) { 1469168404Spjd zap_cursor_fini(&cursor); 1470249643Smm return (SET_ERROR(ENOENT)); 1471168404Spjd } 1472168404Spjd 1473168404Spjd if (strlen(attr.za_name) + 1 > namelen) { 1474168404Spjd zap_cursor_fini(&cursor); 1475249643Smm return (SET_ERROR(ENAMETOOLONG)); 1476168404Spjd } 1477168404Spjd 1478168404Spjd (void) strcpy(name, attr.za_name); 1479168404Spjd if (idp) 1480168404Spjd *idp = attr.za_first_integer; 1481185029Spjd if (case_conflict) 1482185029Spjd *case_conflict = attr.za_normalization_conflict; 1483168404Spjd zap_cursor_advance(&cursor); 1484168404Spjd *offp = zap_cursor_serialize(&cursor); 1485168404Spjd zap_cursor_fini(&cursor); 1486168404Spjd 1487168404Spjd return (0); 1488168404Spjd} 1489168404Spjd 1490168404Spjdint 1491168404Spjddmu_dir_list_next(objset_t *os, int namelen, char *name, 1492168404Spjd uint64_t *idp, uint64_t *offp) 1493168404Spjd{ 1494219089Spjd dsl_dir_t *dd = os->os_dsl_dataset->ds_dir; 1495168404Spjd zap_cursor_t cursor; 1496168404Spjd zap_attribute_t attr; 1497168404Spjd 1498168404Spjd /* there is no next dir on a snapshot! */ 1499219089Spjd if (os->os_dsl_dataset->ds_object != 1500168404Spjd dd->dd_phys->dd_head_dataset_obj) 1501249643Smm return (SET_ERROR(ENOENT)); 1502168404Spjd 1503168404Spjd zap_cursor_init_serialized(&cursor, 1504168404Spjd dd->dd_pool->dp_meta_objset, 1505168404Spjd dd->dd_phys->dd_child_dir_zapobj, *offp); 1506168404Spjd 1507168404Spjd if (zap_cursor_retrieve(&cursor, &attr) != 0) { 1508168404Spjd zap_cursor_fini(&cursor); 1509249643Smm return (SET_ERROR(ENOENT)); 1510168404Spjd } 1511168404Spjd 1512168404Spjd if (strlen(attr.za_name) + 1 > namelen) { 1513168404Spjd zap_cursor_fini(&cursor); 1514249643Smm return (SET_ERROR(ENAMETOOLONG)); 1515168404Spjd } 1516168404Spjd 1517168404Spjd (void) strcpy(name, attr.za_name); 1518168404Spjd if (idp) 1519168404Spjd *idp = attr.za_first_integer; 1520168404Spjd zap_cursor_advance(&cursor); 1521168404Spjd *offp = zap_cursor_serialize(&cursor); 1522168404Spjd zap_cursor_fini(&cursor); 1523168404Spjd 1524168404Spjd return (0); 1525168404Spjd} 1526168404Spjd 1527168404Spjd/* 1528249643Smm * Find objsets under and including ddobj, call func(ds) on each. 1529168404Spjd */ 1530168404Spjdint 1531249643Smmdmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj, 1532249643Smm int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags) 1533168404Spjd{ 1534249643Smm dsl_dir_t *dd; 1535249643Smm dsl_dataset_t *ds; 1536249643Smm zap_cursor_t zc; 1537249643Smm zap_attribute_t *attr; 1538249643Smm uint64_t thisobj; 1539249643Smm int err; 1540249643Smm 1541249643Smm ASSERT(dsl_pool_config_held(dp)); 1542249643Smm 1543249643Smm err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd); 1544249643Smm if (err != 0) 1545249643Smm return (err); 1546249643Smm 1547249643Smm /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 1548249643Smm if (dd->dd_myname[0] == '$') { 1549249643Smm dsl_dir_rele(dd, FTAG); 1550249643Smm return (0); 1551249643Smm } 1552249643Smm 1553249643Smm thisobj = dd->dd_phys->dd_head_dataset_obj; 1554249643Smm attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 1555249643Smm 1556249643Smm /* 1557249643Smm * Iterate over all children. 1558249643Smm */ 1559249643Smm if (flags & DS_FIND_CHILDREN) { 1560249643Smm for (zap_cursor_init(&zc, dp->dp_meta_objset, 1561249643Smm dd->dd_phys->dd_child_dir_zapobj); 1562249643Smm zap_cursor_retrieve(&zc, attr) == 0; 1563249643Smm (void) zap_cursor_advance(&zc)) { 1564249643Smm ASSERT3U(attr->za_integer_length, ==, 1565249643Smm sizeof (uint64_t)); 1566249643Smm ASSERT3U(attr->za_num_integers, ==, 1); 1567249643Smm 1568249643Smm err = dmu_objset_find_dp(dp, attr->za_first_integer, 1569249643Smm func, arg, flags); 1570249643Smm if (err != 0) 1571249643Smm break; 1572249643Smm } 1573249643Smm zap_cursor_fini(&zc); 1574249643Smm 1575249643Smm if (err != 0) { 1576249643Smm dsl_dir_rele(dd, FTAG); 1577249643Smm kmem_free(attr, sizeof (zap_attribute_t)); 1578249643Smm return (err); 1579249643Smm } 1580249643Smm } 1581249643Smm 1582249643Smm /* 1583249643Smm * Iterate over all snapshots. 1584249643Smm */ 1585249643Smm if (flags & DS_FIND_SNAPSHOTS) { 1586249643Smm dsl_dataset_t *ds; 1587249643Smm err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 1588249643Smm 1589249643Smm if (err == 0) { 1590249643Smm uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; 1591249643Smm dsl_dataset_rele(ds, FTAG); 1592249643Smm 1593249643Smm for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 1594249643Smm zap_cursor_retrieve(&zc, attr) == 0; 1595249643Smm (void) zap_cursor_advance(&zc)) { 1596249643Smm ASSERT3U(attr->za_integer_length, ==, 1597249643Smm sizeof (uint64_t)); 1598249643Smm ASSERT3U(attr->za_num_integers, ==, 1); 1599249643Smm 1600249643Smm err = dsl_dataset_hold_obj(dp, 1601249643Smm attr->za_first_integer, FTAG, &ds); 1602249643Smm if (err != 0) 1603249643Smm break; 1604249643Smm err = func(dp, ds, arg); 1605249643Smm dsl_dataset_rele(ds, FTAG); 1606249643Smm if (err != 0) 1607249643Smm break; 1608249643Smm } 1609249643Smm zap_cursor_fini(&zc); 1610249643Smm } 1611249643Smm } 1612249643Smm 1613249643Smm dsl_dir_rele(dd, FTAG); 1614249643Smm kmem_free(attr, sizeof (zap_attribute_t)); 1615249643Smm 1616249643Smm if (err != 0) 1617249643Smm return (err); 1618249643Smm 1619249643Smm /* 1620249643Smm * Apply to self. 1621249643Smm */ 1622249643Smm err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 1623249643Smm if (err != 0) 1624249643Smm return (err); 1625249643Smm err = func(dp, ds, arg); 1626249643Smm dsl_dataset_rele(ds, FTAG); 1627249643Smm return (err); 1628185029Spjd} 1629185029Spjd 1630185029Spjd/* 1631249643Smm * Find all objsets under name, and for each, call 'func(child_name, arg)'. 1632249643Smm * The dp_config_rwlock must not be held when this is called, and it 1633249643Smm * will not be held when the callback is called. 1634249643Smm * Therefore this function should only be used when the pool is not changing 1635249643Smm * (e.g. in syncing context), or the callback can deal with the possible races. 1636185029Spjd */ 1637249643Smmstatic int 1638249643Smmdmu_objset_find_impl(spa_t *spa, const char *name, 1639249643Smm int func(const char *, void *), void *arg, int flags) 1640185029Spjd{ 1641168404Spjd dsl_dir_t *dd; 1642249643Smm dsl_pool_t *dp = spa_get_dsl(spa); 1643185029Spjd dsl_dataset_t *ds; 1644168404Spjd zap_cursor_t zc; 1645168498Spjd zap_attribute_t *attr; 1646168404Spjd char *child; 1647185029Spjd uint64_t thisobj; 1648185029Spjd int err; 1649168404Spjd 1650249643Smm dsl_pool_config_enter(dp, FTAG); 1651249643Smm 1652249643Smm err = dsl_dir_hold(dp, name, FTAG, &dd, NULL); 1653249643Smm if (err != 0) { 1654249643Smm dsl_pool_config_exit(dp, FTAG); 1655168404Spjd return (err); 1656249643Smm } 1657168404Spjd 1658185029Spjd /* Don't visit hidden ($MOS & $ORIGIN) objsets. */ 1659185029Spjd if (dd->dd_myname[0] == '$') { 1660249643Smm dsl_dir_rele(dd, FTAG); 1661249643Smm dsl_pool_config_exit(dp, FTAG); 1662185029Spjd return (0); 1663185029Spjd } 1664185029Spjd 1665185029Spjd thisobj = dd->dd_phys->dd_head_dataset_obj; 1666168498Spjd attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 1667168404Spjd 1668168404Spjd /* 1669168404Spjd * Iterate over all children. 1670168404Spjd */ 1671168404Spjd if (flags & DS_FIND_CHILDREN) { 1672185029Spjd for (zap_cursor_init(&zc, dp->dp_meta_objset, 1673168404Spjd dd->dd_phys->dd_child_dir_zapobj); 1674168498Spjd zap_cursor_retrieve(&zc, attr) == 0; 1675168404Spjd (void) zap_cursor_advance(&zc)) { 1676249643Smm ASSERT3U(attr->za_integer_length, ==, 1677249643Smm sizeof (uint64_t)); 1678249643Smm ASSERT3U(attr->za_num_integers, ==, 1); 1679168404Spjd 1680219089Spjd child = kmem_asprintf("%s/%s", name, attr->za_name); 1681249643Smm dsl_pool_config_exit(dp, FTAG); 1682249643Smm err = dmu_objset_find_impl(spa, child, 1683249643Smm func, arg, flags); 1684249643Smm dsl_pool_config_enter(dp, FTAG); 1685219089Spjd strfree(child); 1686249643Smm if (err != 0) 1687168404Spjd break; 1688168404Spjd } 1689168404Spjd zap_cursor_fini(&zc); 1690168404Spjd 1691249643Smm if (err != 0) { 1692249643Smm dsl_dir_rele(dd, FTAG); 1693249643Smm dsl_pool_config_exit(dp, FTAG); 1694168498Spjd kmem_free(attr, sizeof (zap_attribute_t)); 1695168404Spjd return (err); 1696168404Spjd } 1697168404Spjd } 1698168404Spjd 1699168404Spjd /* 1700168404Spjd * Iterate over all snapshots. 1701168404Spjd */ 1702185029Spjd if (flags & DS_FIND_SNAPSHOTS) { 1703185029Spjd err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds); 1704168404Spjd 1705185029Spjd if (err == 0) { 1706185029Spjd uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; 1707185029Spjd dsl_dataset_rele(ds, FTAG); 1708168404Spjd 1709185029Spjd for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj); 1710185029Spjd zap_cursor_retrieve(&zc, attr) == 0; 1711185029Spjd (void) zap_cursor_advance(&zc)) { 1712249643Smm ASSERT3U(attr->za_integer_length, ==, 1713185029Spjd sizeof (uint64_t)); 1714249643Smm ASSERT3U(attr->za_num_integers, ==, 1); 1715168404Spjd 1716219089Spjd child = kmem_asprintf("%s@%s", 1717219089Spjd name, attr->za_name); 1718249643Smm dsl_pool_config_exit(dp, FTAG); 1719249643Smm err = func(child, arg); 1720249643Smm dsl_pool_config_enter(dp, FTAG); 1721219089Spjd strfree(child); 1722249643Smm if (err != 0) 1723185029Spjd break; 1724185029Spjd } 1725185029Spjd zap_cursor_fini(&zc); 1726168404Spjd } 1727168404Spjd } 1728168404Spjd 1729249643Smm dsl_dir_rele(dd, FTAG); 1730168498Spjd kmem_free(attr, sizeof (zap_attribute_t)); 1731249643Smm dsl_pool_config_exit(dp, FTAG); 1732168404Spjd 1733249643Smm if (err != 0) 1734168404Spjd return (err); 1735168404Spjd 1736249643Smm /* Apply to self. */ 1737249643Smm return (func(name, arg)); 1738168404Spjd} 1739185029Spjd 1740249643Smm/* 1741249643Smm * See comment above dmu_objset_find_impl(). 1742249643Smm */ 1743207626Smmint 1744249643Smmdmu_objset_find(char *name, int func(const char *, void *), void *arg, 1745249643Smm int flags) 1746207626Smm{ 1747249643Smm spa_t *spa; 1748249643Smm int error; 1749207626Smm 1750249643Smm error = spa_open(name, &spa, FTAG); 1751249643Smm if (error != 0) 1752249643Smm return (error); 1753249643Smm error = dmu_objset_find_impl(spa, name, func, arg, flags); 1754249643Smm spa_close(spa, FTAG); 1755249643Smm return (error); 1756207626Smm} 1757207626Smm 1758185029Spjdvoid 1759185029Spjddmu_objset_set_user(objset_t *os, void *user_ptr) 1760185029Spjd{ 1761219089Spjd ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 1762219089Spjd os->os_user_ptr = user_ptr; 1763185029Spjd} 1764185029Spjd 1765185029Spjdvoid * 1766185029Spjddmu_objset_get_user(objset_t *os) 1767185029Spjd{ 1768219089Spjd ASSERT(MUTEX_HELD(&os->os_user_ptr_lock)); 1769219089Spjd return (os->os_user_ptr); 1770185029Spjd} 1771249643Smm 1772249643Smm/* 1773249643Smm * Determine name of filesystem, given name of snapshot. 1774249643Smm * buf must be at least MAXNAMELEN bytes 1775249643Smm */ 1776249643Smmint 1777249643Smmdmu_fsname(const char *snapname, char *buf) 1778249643Smm{ 1779249643Smm char *atp = strchr(snapname, '@'); 1780249643Smm if (atp == NULL) 1781249643Smm return (SET_ERROR(EINVAL)); 1782249643Smm if (atp - snapname >= MAXNAMELEN) 1783249643Smm return (SET_ERROR(ENAMETOOLONG)); 1784249643Smm (void) strlcpy(buf, snapname, atp - snapname + 1); 1785249643Smm return (0); 1786249643Smm} 1787