1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 223f9d6ad7SLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 2386714001SSerapheim Dimitropoulos * Copyright (c) 2012, 2018 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #include <sys/zfs_context.h> 27fa9e4066Sahrens #include <sys/dmu_objset.h> 28fa9e4066Sahrens #include <sys/dmu_traverse.h> 29fa9e4066Sahrens #include <sys/dsl_dataset.h> 30fa9e4066Sahrens #include <sys/dsl_dir.h> 31fa9e4066Sahrens #include <sys/dsl_pool.h> 32fa9e4066Sahrens #include <sys/dnode.h> 33fa9e4066Sahrens #include <sys/spa.h> 3486714001SSerapheim Dimitropoulos #include <sys/spa_impl.h> 35fa9e4066Sahrens #include <sys/zio.h> 36fa9e4066Sahrens #include <sys/dmu_impl.h> 370a586ceaSMark Shellenbaum #include <sys/sa.h> 380a586ceaSMark Shellenbaum #include <sys/sa_impl.h> 3988b7b0f2SMatthew Ahrens #include <sys/callb.h> 4043466aaeSMax Grossman #include <sys/zfeature.h> 4188b7b0f2SMatthew Ahrens 4234d7ce05SGeorge Wilson int32_t zfs_pd_bytes_max = 50 * 1024 * 1024; /* 50MB */ 43f76886deSPaul Dagnelie boolean_t send_holes_without_birth_time = B_TRUE; 4444f92b7dSChris Kirby 456e0cbcaaSMatthew Ahrens typedef struct prefetch_data { 4688b7b0f2SMatthew Ahrens kmutex_t pd_mtx; 4788b7b0f2SMatthew Ahrens kcondvar_t pd_cv; 4834d7ce05SGeorge Wilson int32_t pd_bytes_fetched; 4988b7b0f2SMatthew Ahrens int pd_flags; 5088b7b0f2SMatthew Ahrens boolean_t pd_cancel; 5188b7b0f2SMatthew Ahrens boolean_t pd_exited; 529c3fd121SMatthew Ahrens zbookmark_phys_t pd_resume; 536e0cbcaaSMatthew Ahrens } prefetch_data_t; 5488b7b0f2SMatthew Ahrens 556e0cbcaaSMatthew Ahrens typedef struct traverse_data { 5688b7b0f2SMatthew Ahrens spa_t *td_spa; 5788b7b0f2SMatthew Ahrens uint64_t td_objset; 5888b7b0f2SMatthew Ahrens blkptr_t *td_rootbp; 5988b7b0f2SMatthew Ahrens uint64_t td_min_txg; 607802d7bfSMatthew Ahrens zbookmark_phys_t *td_resume; 6188b7b0f2SMatthew Ahrens int td_flags; 626e0cbcaaSMatthew Ahrens prefetch_data_t *td_pfd; 637fd05ac4SMatthew Ahrens boolean_t td_paused; 64f7950bf1SMatthew Ahrens uint64_t td_hole_birth_enabled_txg; 6588b7b0f2SMatthew Ahrens blkptr_cb_t *td_func; 6688b7b0f2SMatthew Ahrens void *td_arg; 67286ef713SPaul Dagnelie boolean_t td_realloc_possible; 686e0cbcaaSMatthew Ahrens } traverse_data_t; 69fa9e4066Sahrens 706e0cbcaaSMatthew Ahrens static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, 711b912ec7SGeorge Wilson uint64_t objset, uint64_t object); 72b4709335SMatthew Ahrens static void prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *, 731b912ec7SGeorge Wilson uint64_t objset, uint64_t object); 7414843421SMatthew Ahrens 75b24ab676SJeff Bonwick static int 765dabedeeSbonwick traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) 77ea8dc4b6Seschrock { 786e0cbcaaSMatthew Ahrens traverse_data_t *td = arg; 797802d7bfSMatthew Ahrens zbookmark_phys_t zb; 80ea8dc4b6Seschrock 8143466aaeSMax Grossman if (BP_IS_HOLE(bp)) 82b24ab676SJeff Bonwick return (0); 835dabedeeSbonwick 8486714001SSerapheim Dimitropoulos if (claim_txg == 0 && bp->blk_birth >= spa_min_claim_txg(td->td_spa)) 8586714001SSerapheim Dimitropoulos return (-1); 8688b7b0f2SMatthew Ahrens 87b24ab676SJeff Bonwick SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, 88b24ab676SJeff Bonwick bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); 89b24ab676SJeff Bonwick 901b912ec7SGeorge Wilson (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg); 91b24ab676SJeff Bonwick 92b24ab676SJeff Bonwick return (0); 93ea8dc4b6Seschrock } 94ea8dc4b6Seschrock 95b24ab676SJeff Bonwick static int 965dabedeeSbonwick traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) 97ea8dc4b6Seschrock { 986e0cbcaaSMatthew Ahrens traverse_data_t *td = arg; 99ea8dc4b6Seschrock 100ea8dc4b6Seschrock if (lrc->lrc_txtype == TX_WRITE) { 101ea8dc4b6Seschrock lr_write_t *lr = (lr_write_t *)lrc; 102ea8dc4b6Seschrock blkptr_t *bp = &lr->lr_blkptr; 1037802d7bfSMatthew Ahrens zbookmark_phys_t zb; 104ea8dc4b6Seschrock 10543466aaeSMax Grossman if (BP_IS_HOLE(bp)) 106b24ab676SJeff Bonwick return (0); 1075dabedeeSbonwick 10888b7b0f2SMatthew Ahrens if (claim_txg == 0 || bp->blk_birth < claim_txg) 109b24ab676SJeff Bonwick return (0); 110b24ab676SJeff Bonwick 1116e0cbcaaSMatthew Ahrens SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, 1126e0cbcaaSMatthew Ahrens ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp)); 11388b7b0f2SMatthew Ahrens 1141b912ec7SGeorge Wilson (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, 115b24ab676SJeff Bonwick td->td_arg); 116ea8dc4b6Seschrock } 117b24ab676SJeff Bonwick return (0); 118ea8dc4b6Seschrock } 119ea8dc4b6Seschrock 120ea8dc4b6Seschrock static void 1216e0cbcaaSMatthew Ahrens traverse_zil(traverse_data_t *td, zil_header_t *zh) 122ea8dc4b6Seschrock { 1235dabedeeSbonwick uint64_t claim_txg = zh->zh_claim_txg; 124ea8dc4b6Seschrock 1255dabedeeSbonwick /* 1265dabedeeSbonwick * We only want to visit blocks that have been claimed but not yet 12786714001SSerapheim Dimitropoulos * replayed; plus blocks that are already stable in read-only mode. 1285dabedeeSbonwick */ 1298ad4d6ddSJeff Bonwick if (claim_txg == 0 && spa_writeable(td->td_spa)) 1305dabedeeSbonwick return; 1315dabedeeSbonwick 13286714001SSerapheim Dimitropoulos zilog_t *zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh); 13388b7b0f2SMatthew Ahrens (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td, 134*eb633035STom Caputi claim_txg, !(td->td_flags & TRAVERSE_NO_DECRYPT)); 135ea8dc4b6Seschrock zil_free(zilog); 136ea8dc4b6Seschrock } 137ea8dc4b6Seschrock 138ad135b5dSChristopher Siden typedef enum resume_skip { 139ad135b5dSChristopher Siden RESUME_SKIP_ALL, 140ad135b5dSChristopher Siden RESUME_SKIP_NONE, 141ad135b5dSChristopher Siden RESUME_SKIP_CHILDREN 142ad135b5dSChristopher Siden } resume_skip_t; 143ad135b5dSChristopher Siden 144ad135b5dSChristopher Siden /* 145ad135b5dSChristopher Siden * Returns RESUME_SKIP_ALL if td indicates that we are resuming a traversal and 146ad135b5dSChristopher Siden * the block indicated by zb does not need to be visited at all. Returns 147ad135b5dSChristopher Siden * RESUME_SKIP_CHILDREN if we are resuming a post traversal and we reach the 148ad135b5dSChristopher Siden * resume point. This indicates that this block should be visited but not its 149ad135b5dSChristopher Siden * children (since they must have been visited in a previous traversal). 150ad135b5dSChristopher Siden * Otherwise returns RESUME_SKIP_NONE. 151ad135b5dSChristopher Siden */ 152ad135b5dSChristopher Siden static resume_skip_t 153ad135b5dSChristopher Siden resume_skip_check(traverse_data_t *td, const dnode_phys_t *dnp, 1547802d7bfSMatthew Ahrens const zbookmark_phys_t *zb) 155ad135b5dSChristopher Siden { 156ad135b5dSChristopher Siden if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) { 157ad135b5dSChristopher Siden /* 158ad135b5dSChristopher Siden * If we already visited this bp & everything below, 159ad135b5dSChristopher Siden * don't bother doing it again. 160ad135b5dSChristopher Siden */ 161a2cdcdd2SPaul Dagnelie if (zbookmark_subtree_completed(dnp, zb, td->td_resume)) 162ad135b5dSChristopher Siden return (RESUME_SKIP_ALL); 163ad135b5dSChristopher Siden 164ad135b5dSChristopher Siden /* 165ad135b5dSChristopher Siden * If we found the block we're trying to resume from, zero 166ad135b5dSChristopher Siden * the bookmark out to indicate that we have resumed. 167ad135b5dSChristopher Siden */ 168ad135b5dSChristopher Siden if (bcmp(zb, td->td_resume, sizeof (*zb)) == 0) { 169ad135b5dSChristopher Siden bzero(td->td_resume, sizeof (*zb)); 170ad135b5dSChristopher Siden if (td->td_flags & TRAVERSE_POST) 171ad135b5dSChristopher Siden return (RESUME_SKIP_CHILDREN); 172ad135b5dSChristopher Siden } 173ad135b5dSChristopher Siden } 174ad135b5dSChristopher Siden return (RESUME_SKIP_NONE); 175ad135b5dSChristopher Siden } 176ad135b5dSChristopher Siden 177b4709335SMatthew Ahrens static void 178b4709335SMatthew Ahrens traverse_prefetch_metadata(traverse_data_t *td, 1797802d7bfSMatthew Ahrens const blkptr_t *bp, const zbookmark_phys_t *zb) 180b4709335SMatthew Ahrens { 1817adb730bSGeorge Wilson arc_flags_t flags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH; 182*eb633035STom Caputi int zio_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE; 183b4709335SMatthew Ahrens 184b4709335SMatthew Ahrens if (!(td->td_flags & TRAVERSE_PREFETCH_METADATA)) 185b4709335SMatthew Ahrens return; 186b4709335SMatthew Ahrens /* 187b4709335SMatthew Ahrens * If we are in the process of resuming, don't prefetch, because 188b4709335SMatthew Ahrens * some children will not be needed (and in fact may have already 189b4709335SMatthew Ahrens * been freed). 190b4709335SMatthew Ahrens */ 191b4709335SMatthew Ahrens if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) 192b4709335SMatthew Ahrens return; 193b4709335SMatthew Ahrens if (BP_IS_HOLE(bp) || bp->blk_birth <= td->td_min_txg) 194b4709335SMatthew Ahrens return; 195b4709335SMatthew Ahrens if (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE) 196b4709335SMatthew Ahrens return; 197b4709335SMatthew Ahrens 198*eb633035STom Caputi if ((td->td_flags & TRAVERSE_NO_DECRYPT) && BP_IS_PROTECTED(bp)) 199*eb633035STom Caputi zio_flags |= ZIO_FLAG_RAW; 200*eb633035STom Caputi 2011b912ec7SGeorge Wilson (void) arc_read(NULL, td->td_spa, bp, NULL, NULL, 202*eb633035STom Caputi ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb); 203b4709335SMatthew Ahrens } 204b4709335SMatthew Ahrens 20506315b79SMatthew Ahrens static boolean_t 20606315b79SMatthew Ahrens prefetch_needed(prefetch_data_t *pfd, const blkptr_t *bp) 20706315b79SMatthew Ahrens { 20806315b79SMatthew Ahrens ASSERT(pfd->pd_flags & TRAVERSE_PREFETCH_DATA); 20906315b79SMatthew Ahrens if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp) || 21006315b79SMatthew Ahrens BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) 21106315b79SMatthew Ahrens return (B_FALSE); 21206315b79SMatthew Ahrens return (B_TRUE); 21306315b79SMatthew Ahrens } 21406315b79SMatthew Ahrens 215fa9e4066Sahrens static int 2166e0cbcaaSMatthew Ahrens traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp, 2177802d7bfSMatthew Ahrens const blkptr_t *bp, const zbookmark_phys_t *zb) 218fa9e4066Sahrens { 2197802d7bfSMatthew Ahrens zbookmark_phys_t czb; 2207fd05ac4SMatthew Ahrens int err = 0; 22188b7b0f2SMatthew Ahrens arc_buf_t *buf = NULL; 2226e0cbcaaSMatthew Ahrens prefetch_data_t *pd = td->td_pfd; 223cd088ea4SVictor Latushkin boolean_t hard = td->td_flags & TRAVERSE_HARD; 224ad135b5dSChristopher Siden 225ad135b5dSChristopher Siden switch (resume_skip_check(td, dnp, zb)) { 226ad135b5dSChristopher Siden case RESUME_SKIP_ALL: 227ad135b5dSChristopher Siden return (0); 228ad135b5dSChristopher Siden case RESUME_SKIP_CHILDREN: 229ad135b5dSChristopher Siden goto post; 230ad135b5dSChristopher Siden case RESUME_SKIP_NONE: 231ad135b5dSChristopher Siden break; 232ad135b5dSChristopher Siden default: 233ad135b5dSChristopher Siden ASSERT(0); 234ad135b5dSChristopher Siden } 235fa9e4066Sahrens 23643466aaeSMax Grossman if (bp->blk_birth == 0) { 237f7950bf1SMatthew Ahrens /* 238286ef713SPaul Dagnelie * Since this block has a birth time of 0 it must be one of 239286ef713SPaul Dagnelie * two things: a hole created before the 240286ef713SPaul Dagnelie * SPA_FEATURE_HOLE_BIRTH feature was enabled, or a hole 241286ef713SPaul Dagnelie * which has always been a hole in an object. 242286ef713SPaul Dagnelie * 243286ef713SPaul Dagnelie * If a file is written sparsely, then the unwritten parts of 244286ef713SPaul Dagnelie * the file were "always holes" -- that is, they have been 245286ef713SPaul Dagnelie * holes since this object was allocated. However, we (and 246286ef713SPaul Dagnelie * our callers) can not necessarily tell when an object was 247286ef713SPaul Dagnelie * allocated. Therefore, if it's possible that this object 248286ef713SPaul Dagnelie * was freed and then its object number reused, we need to 249286ef713SPaul Dagnelie * visit all the holes with birth==0. 250286ef713SPaul Dagnelie * 251286ef713SPaul Dagnelie * If it isn't possible that the object number was reused, 252286ef713SPaul Dagnelie * then if SPA_FEATURE_HOLE_BIRTH was enabled before we wrote 253286ef713SPaul Dagnelie * all the blocks we will visit as part of this traversal, 254286ef713SPaul Dagnelie * then this hole must have always existed, so we can skip 255286ef713SPaul Dagnelie * it. We visit blocks born after (exclusive) td_min_txg. 256286ef713SPaul Dagnelie * 257286ef713SPaul Dagnelie * Note that the meta-dnode cannot be reallocated. 258f7950bf1SMatthew Ahrens */ 259f76886deSPaul Dagnelie if (!send_holes_without_birth_time && 260f76886deSPaul Dagnelie (!td->td_realloc_possible || 261286ef713SPaul Dagnelie zb->zb_object == DMU_META_DNODE_OBJECT) && 262286ef713SPaul Dagnelie td->td_hole_birth_enabled_txg <= td->td_min_txg) 263f7950bf1SMatthew Ahrens return (0); 26443466aaeSMax Grossman } else if (bp->blk_birth <= td->td_min_txg) { 26543466aaeSMax Grossman return (0); 26643466aaeSMax Grossman } 26743466aaeSMax Grossman 26806315b79SMatthew Ahrens if (pd != NULL && !pd->pd_exited && prefetch_needed(pd, bp)) { 26934d7ce05SGeorge Wilson uint64_t size = BP_GET_LSIZE(bp); 27088b7b0f2SMatthew Ahrens mutex_enter(&pd->pd_mtx); 27134d7ce05SGeorge Wilson ASSERT(pd->pd_bytes_fetched >= 0); 27234d7ce05SGeorge Wilson while (pd->pd_bytes_fetched < size && !pd->pd_exited) 27388b7b0f2SMatthew Ahrens cv_wait(&pd->pd_cv, &pd->pd_mtx); 27434d7ce05SGeorge Wilson pd->pd_bytes_fetched -= size; 27588b7b0f2SMatthew Ahrens cv_broadcast(&pd->pd_cv); 27688b7b0f2SMatthew Ahrens mutex_exit(&pd->pd_mtx); 277fa9e4066Sahrens } 278fa9e4066Sahrens 27906315b79SMatthew Ahrens if (BP_IS_HOLE(bp)) { 28006315b79SMatthew Ahrens err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); 28106315b79SMatthew Ahrens if (err != 0) 28206315b79SMatthew Ahrens goto post; 28306315b79SMatthew Ahrens return (0); 28406315b79SMatthew Ahrens } 28506315b79SMatthew Ahrens 28688b7b0f2SMatthew Ahrens if (td->td_flags & TRAVERSE_PRE) { 2871b912ec7SGeorge Wilson err = td->td_func(td->td_spa, NULL, bp, zb, dnp, 2883f9d6ad7SLin Ling td->td_arg); 28999d5e173STim Haley if (err == TRAVERSE_VISIT_NO_CHILDREN) 29099d5e173STim Haley return (0); 291ad135b5dSChristopher Siden if (err != 0) 292ad135b5dSChristopher Siden goto post; 293fa9e4066Sahrens } 294fa9e4066Sahrens 29588b7b0f2SMatthew Ahrens if (BP_GET_LEVEL(bp) > 0) { 2967adb730bSGeorge Wilson arc_flags_t flags = ARC_FLAG_WAIT; 29788b7b0f2SMatthew Ahrens int i; 29888b7b0f2SMatthew Ahrens blkptr_t *cbp; 29988b7b0f2SMatthew Ahrens int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; 30088b7b0f2SMatthew Ahrens 301*eb633035STom Caputi ASSERT(!BP_IS_PROTECTED(bp)); 302*eb633035STom Caputi 3031b912ec7SGeorge Wilson err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, 30488b7b0f2SMatthew Ahrens ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); 3053b2aab18SMatthew Ahrens if (err != 0) 3067fd05ac4SMatthew Ahrens goto post; 307b4709335SMatthew Ahrens cbp = buf->b_data; 308b4709335SMatthew Ahrens 309b4709335SMatthew Ahrens for (i = 0; i < epb; i++) { 310b4709335SMatthew Ahrens SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object, 311b4709335SMatthew Ahrens zb->zb_level - 1, 312b4709335SMatthew Ahrens zb->zb_blkid * epb + i); 3131b912ec7SGeorge Wilson traverse_prefetch_metadata(td, &cbp[i], &czb); 314b4709335SMatthew Ahrens } 31588b7b0f2SMatthew Ahrens 31688b7b0f2SMatthew Ahrens /* recursively visitbp() blocks below this */ 317b4709335SMatthew Ahrens for (i = 0; i < epb; i++) { 31888b7b0f2SMatthew Ahrens SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object, 31988b7b0f2SMatthew Ahrens zb->zb_level - 1, 32088b7b0f2SMatthew Ahrens zb->zb_blkid * epb + i); 3211b912ec7SGeorge Wilson err = traverse_visitbp(td, dnp, &cbp[i], &czb); 3227fd05ac4SMatthew Ahrens if (err != 0) 3237fd05ac4SMatthew Ahrens break; 32488b7b0f2SMatthew Ahrens } 32588b7b0f2SMatthew Ahrens } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { 3267adb730bSGeorge Wilson arc_flags_t flags = ARC_FLAG_WAIT; 327*eb633035STom Caputi uint32_t zio_flags = ZIO_FLAG_CANFAIL; 32814843421SMatthew Ahrens int i; 32988b7b0f2SMatthew Ahrens int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; 33088b7b0f2SMatthew Ahrens 331*eb633035STom Caputi /* 332*eb633035STom Caputi * dnode blocks might have their bonus buffers encrypted, so 333*eb633035STom Caputi * we must be careful to honor TRAVERSE_NO_DECRYPT 334*eb633035STom Caputi */ 335*eb633035STom Caputi if ((td->td_flags & TRAVERSE_NO_DECRYPT) && BP_IS_PROTECTED(bp)) 336*eb633035STom Caputi zio_flags |= ZIO_FLAG_RAW; 3371b912ec7SGeorge Wilson err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, 338*eb633035STom Caputi ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb); 3393b2aab18SMatthew Ahrens if (err != 0) 3407fd05ac4SMatthew Ahrens goto post; 3419c3fd121SMatthew Ahrens dnode_phys_t *child_dnp = buf->b_data; 342b4709335SMatthew Ahrens 34354811da5SToomas Soome for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { 3449c3fd121SMatthew Ahrens prefetch_dnode_metadata(td, &child_dnp[i], 3459c3fd121SMatthew Ahrens zb->zb_objset, zb->zb_blkid * epb + i); 346b4709335SMatthew Ahrens } 34788b7b0f2SMatthew Ahrens 34888b7b0f2SMatthew Ahrens /* recursively visitbp() blocks below this */ 34954811da5SToomas Soome for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { 3509c3fd121SMatthew Ahrens err = traverse_dnode(td, &child_dnp[i], 3519c3fd121SMatthew Ahrens zb->zb_objset, zb->zb_blkid * epb + i); 3527fd05ac4SMatthew Ahrens if (err != 0) 3537fd05ac4SMatthew Ahrens break; 354fa9e4066Sahrens } 35588b7b0f2SMatthew Ahrens } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { 356*eb633035STom Caputi uint32_t zio_flags = ZIO_FLAG_CANFAIL; 3577adb730bSGeorge Wilson arc_flags_t flags = ARC_FLAG_WAIT; 35888b7b0f2SMatthew Ahrens 359*eb633035STom Caputi if ((td->td_flags & TRAVERSE_NO_DECRYPT) && BP_IS_PROTECTED(bp)) 360*eb633035STom Caputi zio_flags |= ZIO_FLAG_RAW; 361*eb633035STom Caputi 3621b912ec7SGeorge Wilson err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, 363*eb633035STom Caputi ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb); 3643b2aab18SMatthew Ahrens if (err != 0) 3657fd05ac4SMatthew Ahrens goto post; 36688b7b0f2SMatthew Ahrens 3679c3fd121SMatthew Ahrens objset_phys_t *osp = buf->b_data; 3689c3fd121SMatthew Ahrens prefetch_dnode_metadata(td, &osp->os_meta_dnode, zb->zb_objset, 369b4709335SMatthew Ahrens DMU_META_DNODE_OBJECT); 370286ef713SPaul Dagnelie /* 371286ef713SPaul Dagnelie * See the block comment above for the goal of this variable. 372286ef713SPaul Dagnelie * If the maxblkid of the meta-dnode is 0, then we know that 373286ef713SPaul Dagnelie * we've never had more than DNODES_PER_BLOCK objects in the 374286ef713SPaul Dagnelie * dataset, which means we can't have reused any object ids. 375286ef713SPaul Dagnelie */ 376286ef713SPaul Dagnelie if (osp->os_meta_dnode.dn_maxblkid == 0) 377286ef713SPaul Dagnelie td->td_realloc_possible = B_FALSE; 378286ef713SPaul Dagnelie 379b4709335SMatthew Ahrens if (arc_buf_size(buf) >= sizeof (objset_phys_t)) { 380b4709335SMatthew Ahrens prefetch_dnode_metadata(td, &osp->os_groupused_dnode, 38148f1b90eSMatthew Ahrens zb->zb_objset, DMU_GROUPUSED_OBJECT); 38248f1b90eSMatthew Ahrens prefetch_dnode_metadata(td, &osp->os_userused_dnode, 3831b912ec7SGeorge Wilson zb->zb_objset, DMU_USERUSED_OBJECT); 384b4709335SMatthew Ahrens } 385b4709335SMatthew Ahrens 3869c3fd121SMatthew Ahrens err = traverse_dnode(td, &osp->os_meta_dnode, zb->zb_objset, 387b24ab676SJeff Bonwick DMU_META_DNODE_OBJECT); 38814843421SMatthew Ahrens if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { 3899c3fd121SMatthew Ahrens err = traverse_dnode(td, &osp->os_groupused_dnode, 3909c3fd121SMatthew Ahrens zb->zb_objset, DMU_GROUPUSED_OBJECT); 39114843421SMatthew Ahrens } 39214843421SMatthew Ahrens if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { 3939c3fd121SMatthew Ahrens err = traverse_dnode(td, &osp->os_userused_dnode, 3949c3fd121SMatthew Ahrens zb->zb_objset, DMU_USERUSED_OBJECT); 39588b7b0f2SMatthew Ahrens } 39688b7b0f2SMatthew Ahrens } 397fa9e4066Sahrens 39888b7b0f2SMatthew Ahrens if (buf) 399dcbf3bd6SGeorge Wilson arc_buf_destroy(buf, &buf); 400fa9e4066Sahrens 401ad135b5dSChristopher Siden post: 4027fd05ac4SMatthew Ahrens if (err == 0 && (td->td_flags & TRAVERSE_POST)) 4031b912ec7SGeorge Wilson err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); 4047fd05ac4SMatthew Ahrens 4057fd05ac4SMatthew Ahrens if (hard && (err == EIO || err == ECKSUM)) { 4067fd05ac4SMatthew Ahrens /* 4077fd05ac4SMatthew Ahrens * Ignore this disk error as requested by the HARD flag, 4087fd05ac4SMatthew Ahrens * and continue traversal. 4097fd05ac4SMatthew Ahrens */ 4107fd05ac4SMatthew Ahrens err = 0; 411ad135b5dSChristopher Siden } 412ad135b5dSChristopher Siden 4137fd05ac4SMatthew Ahrens /* 4147fd05ac4SMatthew Ahrens * If we are stopping here, set td_resume. 4157fd05ac4SMatthew Ahrens */ 4167fd05ac4SMatthew Ahrens if (td->td_resume != NULL && err != 0 && !td->td_paused) { 4177fd05ac4SMatthew Ahrens td->td_resume->zb_objset = zb->zb_objset; 4187fd05ac4SMatthew Ahrens td->td_resume->zb_object = zb->zb_object; 4197fd05ac4SMatthew Ahrens td->td_resume->zb_level = 0; 4207fd05ac4SMatthew Ahrens /* 4217fd05ac4SMatthew Ahrens * If we have stopped on an indirect block (e.g. due to 4227fd05ac4SMatthew Ahrens * i/o error), we have not visited anything below it. 4237fd05ac4SMatthew Ahrens * Set the bookmark to the first level-0 block that we need 4247fd05ac4SMatthew Ahrens * to visit. This way, the resuming code does not need to 4257fd05ac4SMatthew Ahrens * deal with resuming from indirect blocks. 4269c3fd121SMatthew Ahrens * 4279c3fd121SMatthew Ahrens * Note, if zb_level <= 0, dnp may be NULL, so we don't want 4289c3fd121SMatthew Ahrens * to dereference it. 4297fd05ac4SMatthew Ahrens */ 4309c3fd121SMatthew Ahrens td->td_resume->zb_blkid = zb->zb_blkid; 4319c3fd121SMatthew Ahrens if (zb->zb_level > 0) { 4329c3fd121SMatthew Ahrens td->td_resume->zb_blkid <<= zb->zb_level * 4339c3fd121SMatthew Ahrens (dnp->dn_indblkshift - SPA_BLKPTRSHIFT); 4349c3fd121SMatthew Ahrens } 4357fd05ac4SMatthew Ahrens td->td_paused = B_TRUE; 4363f9d6ad7SLin Ling } 437fa9e4066Sahrens 4387fd05ac4SMatthew Ahrens return (err); 439fa9e4066Sahrens } 440fa9e4066Sahrens 441b4709335SMatthew Ahrens static void 442b4709335SMatthew Ahrens prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *dnp, 4431b912ec7SGeorge Wilson uint64_t objset, uint64_t object) 444b4709335SMatthew Ahrens { 445b4709335SMatthew Ahrens int j; 4467802d7bfSMatthew Ahrens zbookmark_phys_t czb; 447b4709335SMatthew Ahrens 448b4709335SMatthew Ahrens for (j = 0; j < dnp->dn_nblkptr; j++) { 449b4709335SMatthew Ahrens SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); 4501b912ec7SGeorge Wilson traverse_prefetch_metadata(td, &dnp->dn_blkptr[j], &czb); 451b4709335SMatthew Ahrens } 452b4709335SMatthew Ahrens 453b4709335SMatthew Ahrens if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { 454b4709335SMatthew Ahrens SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); 45554811da5SToomas Soome traverse_prefetch_metadata(td, DN_SPILL_BLKPTR(dnp), &czb); 456b4709335SMatthew Ahrens } 457b4709335SMatthew Ahrens } 458b4709335SMatthew Ahrens 45914843421SMatthew Ahrens static int 4606e0cbcaaSMatthew Ahrens traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, 4611b912ec7SGeorge Wilson uint64_t objset, uint64_t object) 46214843421SMatthew Ahrens { 4637fd05ac4SMatthew Ahrens int j, err = 0; 4647802d7bfSMatthew Ahrens zbookmark_phys_t czb; 46514843421SMatthew Ahrens 4669c3fd121SMatthew Ahrens if (object != DMU_META_DNODE_OBJECT && td->td_resume != NULL && 4679c3fd121SMatthew Ahrens object < td->td_resume->zb_object) 4689c3fd121SMatthew Ahrens return (0); 4699c3fd121SMatthew Ahrens 470a2cdcdd2SPaul Dagnelie if (td->td_flags & TRAVERSE_PRE) { 471a2cdcdd2SPaul Dagnelie SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, 472a2cdcdd2SPaul Dagnelie ZB_DNODE_BLKID); 473a2cdcdd2SPaul Dagnelie err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, 474a2cdcdd2SPaul Dagnelie td->td_arg); 475a2cdcdd2SPaul Dagnelie if (err == TRAVERSE_VISIT_NO_CHILDREN) 476a2cdcdd2SPaul Dagnelie return (0); 477a2cdcdd2SPaul Dagnelie if (err != 0) 478a2cdcdd2SPaul Dagnelie return (err); 479a2cdcdd2SPaul Dagnelie } 480a2cdcdd2SPaul Dagnelie 48114843421SMatthew Ahrens for (j = 0; j < dnp->dn_nblkptr; j++) { 48214843421SMatthew Ahrens SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); 4831b912ec7SGeorge Wilson err = traverse_visitbp(td, dnp, &dnp->dn_blkptr[j], &czb); 4847fd05ac4SMatthew Ahrens if (err != 0) 4857fd05ac4SMatthew Ahrens break; 4863f9d6ad7SLin Ling } 4873f9d6ad7SLin Ling 488a2cdcdd2SPaul Dagnelie if (err == 0 && (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)) { 489b4709335SMatthew Ahrens SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); 49054811da5SToomas Soome err = traverse_visitbp(td, dnp, DN_SPILL_BLKPTR(dnp), &czb); 49114843421SMatthew Ahrens } 492a2cdcdd2SPaul Dagnelie 493a2cdcdd2SPaul Dagnelie if (err == 0 && (td->td_flags & TRAVERSE_POST)) { 494a2cdcdd2SPaul Dagnelie SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, 495a2cdcdd2SPaul Dagnelie ZB_DNODE_BLKID); 496a2cdcdd2SPaul Dagnelie err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, 497a2cdcdd2SPaul Dagnelie td->td_arg); 498a2cdcdd2SPaul Dagnelie if (err == TRAVERSE_VISIT_NO_CHILDREN) 499a2cdcdd2SPaul Dagnelie return (0); 500a2cdcdd2SPaul Dagnelie if (err != 0) 501a2cdcdd2SPaul Dagnelie return (err); 502a2cdcdd2SPaul Dagnelie } 5037fd05ac4SMatthew Ahrens return (err); 50414843421SMatthew Ahrens } 50514843421SMatthew Ahrens 50688b7b0f2SMatthew Ahrens /* ARGSUSED */ 50788b7b0f2SMatthew Ahrens static int 508b24ab676SJeff Bonwick traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 5097802d7bfSMatthew Ahrens const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 510e7cbe64fSgw { 5116e0cbcaaSMatthew Ahrens prefetch_data_t *pfd = arg; 512*eb633035STom Caputi int zio_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE; 513a3874b8bSToomas Soome arc_flags_t aflags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH | 514a3874b8bSToomas Soome ARC_FLAG_PRESCIENT_PREFETCH; 515e7cbe64fSgw 51634d7ce05SGeorge Wilson ASSERT(pfd->pd_bytes_fetched >= 0); 517a2cdcdd2SPaul Dagnelie if (bp == NULL) 518a2cdcdd2SPaul Dagnelie return (0); 51988b7b0f2SMatthew Ahrens if (pfd->pd_cancel) 520be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR)); 521e7cbe64fSgw 52206315b79SMatthew Ahrens if (!prefetch_needed(pfd, bp)) 523fa9e4066Sahrens return (0); 524fa9e4066Sahrens 52588b7b0f2SMatthew Ahrens mutex_enter(&pfd->pd_mtx); 52634d7ce05SGeorge Wilson while (!pfd->pd_cancel && pfd->pd_bytes_fetched >= zfs_pd_bytes_max) 52788b7b0f2SMatthew Ahrens cv_wait(&pfd->pd_cv, &pfd->pd_mtx); 52834d7ce05SGeorge Wilson pfd->pd_bytes_fetched += BP_GET_LSIZE(bp); 52988b7b0f2SMatthew Ahrens cv_broadcast(&pfd->pd_cv); 53088b7b0f2SMatthew Ahrens mutex_exit(&pfd->pd_mtx); 531fa9e4066Sahrens 532*eb633035STom Caputi if ((pfd->pd_flags & TRAVERSE_NO_DECRYPT) && BP_IS_PROTECTED(bp)) 533*eb633035STom Caputi zio_flags |= ZIO_FLAG_RAW; 534*eb633035STom Caputi 5351b912ec7SGeorge Wilson (void) arc_read(NULL, spa, bp, NULL, NULL, ZIO_PRIORITY_ASYNC_READ, 536*eb633035STom Caputi zio_flags, &aflags, zb); 537fa9e4066Sahrens 53888b7b0f2SMatthew Ahrens return (0); 539fa9e4066Sahrens } 540fa9e4066Sahrens 541fa9e4066Sahrens static void 54288b7b0f2SMatthew Ahrens traverse_prefetch_thread(void *arg) 543fa9e4066Sahrens { 5446e0cbcaaSMatthew Ahrens traverse_data_t *td_main = arg; 5456e0cbcaaSMatthew Ahrens traverse_data_t td = *td_main; 5467802d7bfSMatthew Ahrens zbookmark_phys_t czb; 547fa9e4066Sahrens 54888b7b0f2SMatthew Ahrens td.td_func = traverse_prefetcher; 54988b7b0f2SMatthew Ahrens td.td_arg = td_main->td_pfd; 55088b7b0f2SMatthew Ahrens td.td_pfd = NULL; 5519c3fd121SMatthew Ahrens td.td_resume = &td_main->td_pfd->pd_resume; 552fa9e4066Sahrens 553b24ab676SJeff Bonwick SET_BOOKMARK(&czb, td.td_objset, 554b24ab676SJeff Bonwick ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 5551b912ec7SGeorge Wilson (void) traverse_visitbp(&td, NULL, td.td_rootbp, &czb); 556fa9e4066Sahrens 55788b7b0f2SMatthew Ahrens mutex_enter(&td_main->td_pfd->pd_mtx); 55888b7b0f2SMatthew Ahrens td_main->td_pfd->pd_exited = B_TRUE; 55988b7b0f2SMatthew Ahrens cv_broadcast(&td_main->td_pfd->pd_cv); 56088b7b0f2SMatthew Ahrens mutex_exit(&td_main->td_pfd->pd_mtx); 561fa9e4066Sahrens } 562fa9e4066Sahrens 56388b7b0f2SMatthew Ahrens /* 56488b7b0f2SMatthew Ahrens * NB: dataset must not be changing on-disk (eg, is a snapshot or we are 56588b7b0f2SMatthew Ahrens * in syncing context). 56688b7b0f2SMatthew Ahrens */ 56788b7b0f2SMatthew Ahrens static int 568ad135b5dSChristopher Siden traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp, 5697802d7bfSMatthew Ahrens uint64_t txg_start, zbookmark_phys_t *resume, int flags, 570ad135b5dSChristopher Siden blkptr_cb_t func, void *arg) 571fa9e4066Sahrens { 5726e0cbcaaSMatthew Ahrens traverse_data_t td; 5736e0cbcaaSMatthew Ahrens prefetch_data_t pd = { 0 }; 5747802d7bfSMatthew Ahrens zbookmark_phys_t czb; 57588b7b0f2SMatthew Ahrens int err; 576fa9e4066Sahrens 577ad135b5dSChristopher Siden ASSERT(ds == NULL || objset == ds->ds_object); 578ad135b5dSChristopher Siden ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST)); 579ad135b5dSChristopher Siden 58088b7b0f2SMatthew Ahrens td.td_spa = spa; 581ad135b5dSChristopher Siden td.td_objset = objset; 58288b7b0f2SMatthew Ahrens td.td_rootbp = rootbp; 58388b7b0f2SMatthew Ahrens td.td_min_txg = txg_start; 584ad135b5dSChristopher Siden td.td_resume = resume; 58588b7b0f2SMatthew Ahrens td.td_func = func; 58688b7b0f2SMatthew Ahrens td.td_arg = arg; 58788b7b0f2SMatthew Ahrens td.td_pfd = &pd; 58888b7b0f2SMatthew Ahrens td.td_flags = flags; 5897fd05ac4SMatthew Ahrens td.td_paused = B_FALSE; 590286ef713SPaul Dagnelie td.td_realloc_possible = (txg_start == 0 ? B_FALSE : B_TRUE); 59188b7b0f2SMatthew Ahrens 592f7950bf1SMatthew Ahrens if (spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { 593f7950bf1SMatthew Ahrens VERIFY(spa_feature_enabled_txg(spa, 594f7950bf1SMatthew Ahrens SPA_FEATURE_HOLE_BIRTH, &td.td_hole_birth_enabled_txg)); 595f7950bf1SMatthew Ahrens } else { 596286ef713SPaul Dagnelie td.td_hole_birth_enabled_txg = UINT64_MAX; 597f7950bf1SMatthew Ahrens } 598f7950bf1SMatthew Ahrens 59988b7b0f2SMatthew Ahrens pd.pd_flags = flags; 6009c3fd121SMatthew Ahrens if (resume != NULL) 6019c3fd121SMatthew Ahrens pd.pd_resume = *resume; 60288b7b0f2SMatthew Ahrens mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL); 60388b7b0f2SMatthew Ahrens cv_init(&pd.pd_cv, NULL, CV_DEFAULT, NULL); 60488b7b0f2SMatthew Ahrens 605*eb633035STom Caputi SET_BOOKMARK(&czb, td.td_objset, 606*eb633035STom Caputi ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 607*eb633035STom Caputi 6086e0cbcaaSMatthew Ahrens /* See comment on ZIL traversal in dsl_scan_visitds. */ 609bc9014e6SJustin Gibbs if (ds != NULL && !ds->ds_is_snapshot && !BP_IS_HOLE(rootbp)) { 610*eb633035STom Caputi enum zio_flag zio_flags = ZIO_FLAG_CANFAIL; 6117adb730bSGeorge Wilson arc_flags_t flags = ARC_FLAG_WAIT; 6123b2aab18SMatthew Ahrens objset_phys_t *osp; 6133b2aab18SMatthew Ahrens arc_buf_t *buf; 6146e0cbcaaSMatthew Ahrens 615*eb633035STom Caputi if ((td.td_flags & TRAVERSE_NO_DECRYPT) && 616*eb633035STom Caputi BP_IS_PROTECTED(rootbp)) 617*eb633035STom Caputi zio_flags |= ZIO_FLAG_RAW; 618*eb633035STom Caputi 619*eb633035STom Caputi err = arc_read(NULL, td.td_spa, rootbp, arc_getbuf_func, 620*eb633035STom Caputi &buf, ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, &czb); 6213b2aab18SMatthew Ahrens if (err != 0) 6226e0cbcaaSMatthew Ahrens return (err); 6236e0cbcaaSMatthew Ahrens 6243b2aab18SMatthew Ahrens osp = buf->b_data; 6253b2aab18SMatthew Ahrens traverse_zil(&td, &osp->os_zil_header); 626dcbf3bd6SGeorge Wilson arc_buf_destroy(buf, &buf); 6276e0cbcaaSMatthew Ahrens } 6286e0cbcaaSMatthew Ahrens 629b4709335SMatthew Ahrens if (!(flags & TRAVERSE_PREFETCH_DATA) || 630fc8ae2ecSToomas Soome taskq_dispatch(system_taskq, traverse_prefetch_thread, 631fc8ae2ecSToomas Soome &td, TQ_NOQUEUE) == TASKQID_INVALID) 63288b7b0f2SMatthew Ahrens pd.pd_exited = B_TRUE; 63388b7b0f2SMatthew Ahrens 6341b912ec7SGeorge Wilson err = traverse_visitbp(&td, NULL, rootbp, &czb); 63588b7b0f2SMatthew Ahrens 63688b7b0f2SMatthew Ahrens mutex_enter(&pd.pd_mtx); 63788b7b0f2SMatthew Ahrens pd.pd_cancel = B_TRUE; 63888b7b0f2SMatthew Ahrens cv_broadcast(&pd.pd_cv); 63988b7b0f2SMatthew Ahrens while (!pd.pd_exited) 64088b7b0f2SMatthew Ahrens cv_wait(&pd.pd_cv, &pd.pd_mtx); 64188b7b0f2SMatthew Ahrens mutex_exit(&pd.pd_mtx); 64288b7b0f2SMatthew Ahrens 64388b7b0f2SMatthew Ahrens mutex_destroy(&pd.pd_mtx); 64488b7b0f2SMatthew Ahrens cv_destroy(&pd.pd_cv); 645fa9e4066Sahrens 64688b7b0f2SMatthew Ahrens return (err); 647fa9e4066Sahrens } 648fa9e4066Sahrens 64988b7b0f2SMatthew Ahrens /* 65088b7b0f2SMatthew Ahrens * NB: dataset must not be changing on-disk (eg, is a snapshot or we are 65188b7b0f2SMatthew Ahrens * in syncing context). 65288b7b0f2SMatthew Ahrens */ 65388b7b0f2SMatthew Ahrens int 6549c3fd121SMatthew Ahrens traverse_dataset_resume(dsl_dataset_t *ds, uint64_t txg_start, 6559c3fd121SMatthew Ahrens zbookmark_phys_t *resume, 6569c3fd121SMatthew Ahrens int flags, blkptr_cb_t func, void *arg) 657fa9e4066Sahrens { 658ad135b5dSChristopher Siden return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds, ds->ds_object, 6599c3fd121SMatthew Ahrens &dsl_dataset_phys(ds)->ds_bp, txg_start, resume, flags, func, arg)); 6609c3fd121SMatthew Ahrens } 6619c3fd121SMatthew Ahrens 6629c3fd121SMatthew Ahrens int 6639c3fd121SMatthew Ahrens traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, 6649c3fd121SMatthew Ahrens int flags, blkptr_cb_t func, void *arg) 6659c3fd121SMatthew Ahrens { 6669c3fd121SMatthew Ahrens return (traverse_dataset_resume(ds, txg_start, NULL, flags, func, arg)); 667ad135b5dSChristopher Siden } 668ad135b5dSChristopher Siden 669ad135b5dSChristopher Siden int 670ad135b5dSChristopher Siden traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr, 6717802d7bfSMatthew Ahrens uint64_t txg_start, zbookmark_phys_t *resume, int flags, 672ad135b5dSChristopher Siden blkptr_cb_t func, void *arg) 673ad135b5dSChristopher Siden { 674ad135b5dSChristopher Siden return (traverse_impl(spa, NULL, ZB_DESTROYED_OBJSET, 675ad135b5dSChristopher Siden blkptr, txg_start, resume, flags, func, arg)); 676fa9e4066Sahrens } 677fa9e4066Sahrens 67888b7b0f2SMatthew Ahrens /* 67988b7b0f2SMatthew Ahrens * NB: pool must not be changing on-disk (eg, from zdb or sync context). 68088b7b0f2SMatthew Ahrens */ 68188b7b0f2SMatthew Ahrens int 682bbfd46c4SJeff Bonwick traverse_pool(spa_t *spa, uint64_t txg_start, int flags, 683bbfd46c4SJeff Bonwick blkptr_cb_t func, void *arg) 684fa9e4066Sahrens { 6857fd05ac4SMatthew Ahrens int err; 68688b7b0f2SMatthew Ahrens dsl_pool_t *dp = spa_get_dsl(spa); 68788b7b0f2SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 688cd088ea4SVictor Latushkin boolean_t hard = (flags & TRAVERSE_HARD); 68988b7b0f2SMatthew Ahrens 69088b7b0f2SMatthew Ahrens /* visit the MOS */ 691ad135b5dSChristopher Siden err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa), 692ad135b5dSChristopher Siden txg_start, NULL, flags, func, arg); 6933b2aab18SMatthew Ahrens if (err != 0) 69488b7b0f2SMatthew Ahrens return (err); 69588b7b0f2SMatthew Ahrens 69688b7b0f2SMatthew Ahrens /* visit each dataset */ 6979c3fd121SMatthew Ahrens for (uint64_t obj = 1; err == 0; 6989c3fd121SMatthew Ahrens err = dmu_object_next(mos, &obj, B_FALSE, txg_start)) { 69988b7b0f2SMatthew Ahrens dmu_object_info_t doi; 70088b7b0f2SMatthew Ahrens 70188b7b0f2SMatthew Ahrens err = dmu_object_info(mos, obj, &doi); 7023b2aab18SMatthew Ahrens if (err != 0) { 7037fd05ac4SMatthew Ahrens if (hard) 7047fd05ac4SMatthew Ahrens continue; 7057fd05ac4SMatthew Ahrens break; 706cd088ea4SVictor Latushkin } 70788b7b0f2SMatthew Ahrens 7082acef22dSMatthew Ahrens if (doi.doi_bonus_type == DMU_OT_DSL_DATASET) { 70988b7b0f2SMatthew Ahrens dsl_dataset_t *ds; 710468c413aSTim Haley uint64_t txg = txg_start; 711468c413aSTim Haley 7123b2aab18SMatthew Ahrens dsl_pool_config_enter(dp, FTAG); 71388b7b0f2SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 7143b2aab18SMatthew Ahrens dsl_pool_config_exit(dp, FTAG); 7153b2aab18SMatthew Ahrens if (err != 0) { 7167fd05ac4SMatthew Ahrens if (hard) 7177fd05ac4SMatthew Ahrens continue; 7187fd05ac4SMatthew Ahrens break; 719cd088ea4SVictor Latushkin } 720c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg > txg) 721c1379625SJustin T. Gibbs txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; 722bbfd46c4SJeff Bonwick err = traverse_dataset(ds, txg, flags, func, arg); 72388b7b0f2SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 7247fd05ac4SMatthew Ahrens if (err != 0) 7257fd05ac4SMatthew Ahrens break; 72688b7b0f2SMatthew Ahrens } 727fa9e4066Sahrens } 72888b7b0f2SMatthew Ahrens if (err == ESRCH) 72988b7b0f2SMatthew Ahrens err = 0; 7307fd05ac4SMatthew Ahrens return (err); 731fa9e4066Sahrens } 732