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 /* 22ab69d62fSMatthew Ahrens * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 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> 34fa9e4066Sahrens #include <sys/zio.h> 35fa9e4066Sahrens #include <sys/dmu_impl.h> 3688b7b0f2SMatthew Ahrens #include <sys/callb.h> 3788b7b0f2SMatthew Ahrens 3888b7b0f2SMatthew Ahrens struct prefetch_data { 3988b7b0f2SMatthew Ahrens kmutex_t pd_mtx; 4088b7b0f2SMatthew Ahrens kcondvar_t pd_cv; 4188b7b0f2SMatthew Ahrens int pd_blks_max; 4288b7b0f2SMatthew Ahrens int pd_blks_fetched; 4388b7b0f2SMatthew Ahrens int pd_flags; 4488b7b0f2SMatthew Ahrens boolean_t pd_cancel; 4588b7b0f2SMatthew Ahrens boolean_t pd_exited; 4688b7b0f2SMatthew Ahrens }; 4788b7b0f2SMatthew Ahrens 4888b7b0f2SMatthew Ahrens struct traverse_data { 4988b7b0f2SMatthew Ahrens spa_t *td_spa; 5088b7b0f2SMatthew Ahrens uint64_t td_objset; 5188b7b0f2SMatthew Ahrens blkptr_t *td_rootbp; 5288b7b0f2SMatthew Ahrens uint64_t td_min_txg; 5388b7b0f2SMatthew Ahrens int td_flags; 5488b7b0f2SMatthew Ahrens struct prefetch_data *td_pfd; 5588b7b0f2SMatthew Ahrens blkptr_cb_t *td_func; 5688b7b0f2SMatthew Ahrens void *td_arg; 5788b7b0f2SMatthew Ahrens }; 58fa9e4066Sahrens 5914843421SMatthew Ahrens static int traverse_dnode(struct traverse_data *td, const dnode_phys_t *dnp, 6014843421SMatthew Ahrens arc_buf_t *buf, uint64_t objset, uint64_t object); 6114843421SMatthew Ahrens 62ea8dc4b6Seschrock /* ARGSUSED */ 63*b24ab676SJeff Bonwick static int 645dabedeeSbonwick traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) 65ea8dc4b6Seschrock { 6688b7b0f2SMatthew Ahrens struct traverse_data *td = arg; 6788b7b0f2SMatthew Ahrens zbookmark_t zb; 68ea8dc4b6Seschrock 6988b7b0f2SMatthew Ahrens if (bp->blk_birth == 0) 70*b24ab676SJeff Bonwick return (0); 715dabedeeSbonwick 7288b7b0f2SMatthew Ahrens if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa)) 73*b24ab676SJeff Bonwick return (0); 7488b7b0f2SMatthew Ahrens 75*b24ab676SJeff Bonwick SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, 76*b24ab676SJeff Bonwick bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); 77*b24ab676SJeff Bonwick 78*b24ab676SJeff Bonwick (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg); 79*b24ab676SJeff Bonwick 80*b24ab676SJeff Bonwick return (0); 81ea8dc4b6Seschrock } 82ea8dc4b6Seschrock 83ea8dc4b6Seschrock /* ARGSUSED */ 84*b24ab676SJeff Bonwick static int 855dabedeeSbonwick traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) 86ea8dc4b6Seschrock { 8788b7b0f2SMatthew Ahrens struct traverse_data *td = arg; 88ea8dc4b6Seschrock 89ea8dc4b6Seschrock if (lrc->lrc_txtype == TX_WRITE) { 90ea8dc4b6Seschrock lr_write_t *lr = (lr_write_t *)lrc; 91ea8dc4b6Seschrock blkptr_t *bp = &lr->lr_blkptr; 9288b7b0f2SMatthew Ahrens zbookmark_t zb; 93ea8dc4b6Seschrock 9488b7b0f2SMatthew Ahrens if (bp->blk_birth == 0) 95*b24ab676SJeff Bonwick return (0); 965dabedeeSbonwick 9788b7b0f2SMatthew Ahrens if (claim_txg == 0 || bp->blk_birth < claim_txg) 98*b24ab676SJeff Bonwick return (0); 99*b24ab676SJeff Bonwick 100*b24ab676SJeff Bonwick SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, ZB_ZIL_LEVEL, 101*b24ab676SJeff Bonwick lr->lr_offset / BP_GET_LSIZE(bp)); 10288b7b0f2SMatthew Ahrens 103*b24ab676SJeff Bonwick (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, 104*b24ab676SJeff Bonwick td->td_arg); 105ea8dc4b6Seschrock } 106*b24ab676SJeff Bonwick return (0); 107ea8dc4b6Seschrock } 108ea8dc4b6Seschrock 109ea8dc4b6Seschrock static void 11088b7b0f2SMatthew Ahrens traverse_zil(struct traverse_data *td, zil_header_t *zh) 111ea8dc4b6Seschrock { 1125dabedeeSbonwick uint64_t claim_txg = zh->zh_claim_txg; 113ea8dc4b6Seschrock zilog_t *zilog; 114ea8dc4b6Seschrock 1155dabedeeSbonwick /* 1165dabedeeSbonwick * We only want to visit blocks that have been claimed but not yet 117*b24ab676SJeff Bonwick * replayed; plus, in read-only mode, blocks that are already stable. 1185dabedeeSbonwick */ 1198ad4d6ddSJeff Bonwick if (claim_txg == 0 && spa_writeable(td->td_spa)) 1205dabedeeSbonwick return; 1215dabedeeSbonwick 12288b7b0f2SMatthew Ahrens zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh); 123ea8dc4b6Seschrock 12488b7b0f2SMatthew Ahrens (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td, 1255dabedeeSbonwick claim_txg); 126ea8dc4b6Seschrock 127ea8dc4b6Seschrock zil_free(zilog); 128ea8dc4b6Seschrock } 129ea8dc4b6Seschrock 130fa9e4066Sahrens static int 13188b7b0f2SMatthew Ahrens traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, 13288b7b0f2SMatthew Ahrens arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb) 133fa9e4066Sahrens { 1346a0f0066SEric Taylor zbookmark_t czb; 13588b7b0f2SMatthew Ahrens int err = 0; 13688b7b0f2SMatthew Ahrens arc_buf_t *buf = NULL; 13788b7b0f2SMatthew Ahrens struct prefetch_data *pd = td->td_pfd; 138fa9e4066Sahrens 13988b7b0f2SMatthew Ahrens if (bp->blk_birth == 0) { 140*b24ab676SJeff Bonwick err = td->td_func(td->td_spa, NULL, NULL, zb, dnp, td->td_arg); 14188b7b0f2SMatthew Ahrens return (err); 142fa9e4066Sahrens } 143fa9e4066Sahrens 14488b7b0f2SMatthew Ahrens if (bp->blk_birth <= td->td_min_txg) 14588b7b0f2SMatthew Ahrens return (0); 146fa9e4066Sahrens 14788b7b0f2SMatthew Ahrens if (pd && !pd->pd_exited && 14888b7b0f2SMatthew Ahrens ((pd->pd_flags & TRAVERSE_PREFETCH_DATA) || 14988b7b0f2SMatthew Ahrens BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) { 15088b7b0f2SMatthew Ahrens mutex_enter(&pd->pd_mtx); 15188b7b0f2SMatthew Ahrens ASSERT(pd->pd_blks_fetched >= 0); 15288b7b0f2SMatthew Ahrens while (pd->pd_blks_fetched == 0 && !pd->pd_exited) 15388b7b0f2SMatthew Ahrens cv_wait(&pd->pd_cv, &pd->pd_mtx); 15488b7b0f2SMatthew Ahrens pd->pd_blks_fetched--; 15588b7b0f2SMatthew Ahrens cv_broadcast(&pd->pd_cv); 15688b7b0f2SMatthew Ahrens mutex_exit(&pd->pd_mtx); 157fa9e4066Sahrens } 158fa9e4066Sahrens 15988b7b0f2SMatthew Ahrens if (td->td_flags & TRAVERSE_PRE) { 160*b24ab676SJeff Bonwick err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); 16188b7b0f2SMatthew Ahrens if (err) 16288b7b0f2SMatthew Ahrens return (err); 163fa9e4066Sahrens } 164fa9e4066Sahrens 16588b7b0f2SMatthew Ahrens if (BP_GET_LEVEL(bp) > 0) { 16688b7b0f2SMatthew Ahrens uint32_t flags = ARC_WAIT; 16788b7b0f2SMatthew Ahrens int i; 16888b7b0f2SMatthew Ahrens blkptr_t *cbp; 16988b7b0f2SMatthew Ahrens int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; 17088b7b0f2SMatthew Ahrens 17188b7b0f2SMatthew Ahrens err = arc_read(NULL, td->td_spa, bp, pbuf, 17288b7b0f2SMatthew Ahrens arc_getbuf_func, &buf, 17388b7b0f2SMatthew Ahrens ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); 17488b7b0f2SMatthew Ahrens if (err) 17588b7b0f2SMatthew Ahrens return (err); 17688b7b0f2SMatthew Ahrens 17788b7b0f2SMatthew Ahrens /* recursively visitbp() blocks below this */ 17888b7b0f2SMatthew Ahrens cbp = buf->b_data; 17988b7b0f2SMatthew Ahrens for (i = 0; i < epb; i++, cbp++) { 18088b7b0f2SMatthew Ahrens SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object, 18188b7b0f2SMatthew Ahrens zb->zb_level - 1, 18288b7b0f2SMatthew Ahrens zb->zb_blkid * epb + i); 18388b7b0f2SMatthew Ahrens err = traverse_visitbp(td, dnp, buf, cbp, &czb); 18488b7b0f2SMatthew Ahrens if (err) 18588b7b0f2SMatthew Ahrens break; 18688b7b0f2SMatthew Ahrens } 18788b7b0f2SMatthew Ahrens } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { 18888b7b0f2SMatthew Ahrens uint32_t flags = ARC_WAIT; 18914843421SMatthew Ahrens int i; 19088b7b0f2SMatthew Ahrens int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; 19188b7b0f2SMatthew Ahrens 19288b7b0f2SMatthew Ahrens err = arc_read(NULL, td->td_spa, bp, pbuf, 19388b7b0f2SMatthew Ahrens arc_getbuf_func, &buf, 19488b7b0f2SMatthew Ahrens ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); 19588b7b0f2SMatthew Ahrens if (err) 19688b7b0f2SMatthew Ahrens return (err); 19788b7b0f2SMatthew Ahrens 19888b7b0f2SMatthew Ahrens /* recursively visitbp() blocks below this */ 19988b7b0f2SMatthew Ahrens dnp = buf->b_data; 20088b7b0f2SMatthew Ahrens for (i = 0; i < epb && err == 0; i++, dnp++) { 20114843421SMatthew Ahrens err = traverse_dnode(td, dnp, buf, zb->zb_objset, 20214843421SMatthew Ahrens zb->zb_blkid * epb + i); 20314843421SMatthew Ahrens if (err) 20414843421SMatthew Ahrens break; 205fa9e4066Sahrens } 20688b7b0f2SMatthew Ahrens } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { 20788b7b0f2SMatthew Ahrens uint32_t flags = ARC_WAIT; 20888b7b0f2SMatthew Ahrens objset_phys_t *osp; 20914843421SMatthew Ahrens dnode_phys_t *dnp; 21088b7b0f2SMatthew Ahrens 21188b7b0f2SMatthew Ahrens err = arc_read_nolock(NULL, td->td_spa, bp, 21288b7b0f2SMatthew Ahrens arc_getbuf_func, &buf, 21388b7b0f2SMatthew Ahrens ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); 21488b7b0f2SMatthew Ahrens if (err) 21588b7b0f2SMatthew Ahrens return (err); 21688b7b0f2SMatthew Ahrens 21788b7b0f2SMatthew Ahrens osp = buf->b_data; 21888b7b0f2SMatthew Ahrens traverse_zil(td, &osp->os_zil_header); 219fa9e4066Sahrens 22014843421SMatthew Ahrens dnp = &osp->os_meta_dnode; 221*b24ab676SJeff Bonwick err = traverse_dnode(td, dnp, buf, zb->zb_objset, 222*b24ab676SJeff Bonwick DMU_META_DNODE_OBJECT); 22314843421SMatthew Ahrens if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { 22414843421SMatthew Ahrens dnp = &osp->os_userused_dnode; 22514843421SMatthew Ahrens err = traverse_dnode(td, dnp, buf, zb->zb_objset, 22614843421SMatthew Ahrens DMU_USERUSED_OBJECT); 22714843421SMatthew Ahrens } 22814843421SMatthew Ahrens if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { 22914843421SMatthew Ahrens dnp = &osp->os_groupused_dnode; 23014843421SMatthew Ahrens err = traverse_dnode(td, dnp, buf, zb->zb_objset, 23114843421SMatthew Ahrens DMU_GROUPUSED_OBJECT); 23288b7b0f2SMatthew Ahrens } 23388b7b0f2SMatthew Ahrens } 234fa9e4066Sahrens 23588b7b0f2SMatthew Ahrens if (buf) 23688b7b0f2SMatthew Ahrens (void) arc_buf_remove_ref(buf, &buf); 237fa9e4066Sahrens 23888b7b0f2SMatthew Ahrens if (err == 0 && (td->td_flags & TRAVERSE_POST)) 239*b24ab676SJeff Bonwick err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); 240fa9e4066Sahrens 241fa9e4066Sahrens return (err); 242fa9e4066Sahrens } 243fa9e4066Sahrens 24414843421SMatthew Ahrens static int 24514843421SMatthew Ahrens traverse_dnode(struct traverse_data *td, const dnode_phys_t *dnp, 24614843421SMatthew Ahrens arc_buf_t *buf, uint64_t objset, uint64_t object) 24714843421SMatthew Ahrens { 24814843421SMatthew Ahrens int j, err = 0; 24914843421SMatthew Ahrens zbookmark_t czb; 25014843421SMatthew Ahrens 25114843421SMatthew Ahrens for (j = 0; j < dnp->dn_nblkptr; j++) { 25214843421SMatthew Ahrens SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); 25314843421SMatthew Ahrens err = traverse_visitbp(td, dnp, buf, 25414843421SMatthew Ahrens (blkptr_t *)&dnp->dn_blkptr[j], &czb); 25514843421SMatthew Ahrens if (err) 25614843421SMatthew Ahrens break; 25714843421SMatthew Ahrens } 25814843421SMatthew Ahrens return (err); 25914843421SMatthew Ahrens } 26014843421SMatthew Ahrens 26188b7b0f2SMatthew Ahrens /* ARGSUSED */ 26288b7b0f2SMatthew Ahrens static int 263*b24ab676SJeff Bonwick traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 264*b24ab676SJeff Bonwick const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) 265e7cbe64fSgw { 26688b7b0f2SMatthew Ahrens struct prefetch_data *pfd = arg; 26788b7b0f2SMatthew Ahrens uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH; 268e7cbe64fSgw 26988b7b0f2SMatthew Ahrens ASSERT(pfd->pd_blks_fetched >= 0); 27088b7b0f2SMatthew Ahrens if (pfd->pd_cancel) 27188b7b0f2SMatthew Ahrens return (EINTR); 272e7cbe64fSgw 27388b7b0f2SMatthew Ahrens if (bp == NULL || !((pfd->pd_flags & TRAVERSE_PREFETCH_DATA) || 27488b7b0f2SMatthew Ahrens BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) 275fa9e4066Sahrens return (0); 276fa9e4066Sahrens 27788b7b0f2SMatthew Ahrens mutex_enter(&pfd->pd_mtx); 27888b7b0f2SMatthew Ahrens while (!pfd->pd_cancel && pfd->pd_blks_fetched >= pfd->pd_blks_max) 27988b7b0f2SMatthew Ahrens cv_wait(&pfd->pd_cv, &pfd->pd_mtx); 28088b7b0f2SMatthew Ahrens pfd->pd_blks_fetched++; 28188b7b0f2SMatthew Ahrens cv_broadcast(&pfd->pd_cv); 28288b7b0f2SMatthew Ahrens mutex_exit(&pfd->pd_mtx); 283fa9e4066Sahrens 28488b7b0f2SMatthew Ahrens (void) arc_read_nolock(NULL, spa, bp, NULL, NULL, 28588b7b0f2SMatthew Ahrens ZIO_PRIORITY_ASYNC_READ, 28688b7b0f2SMatthew Ahrens ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, 28788b7b0f2SMatthew Ahrens &aflags, zb); 288fa9e4066Sahrens 28988b7b0f2SMatthew Ahrens return (0); 290fa9e4066Sahrens } 291fa9e4066Sahrens 292fa9e4066Sahrens static void 29388b7b0f2SMatthew Ahrens traverse_prefetch_thread(void *arg) 294fa9e4066Sahrens { 29588b7b0f2SMatthew Ahrens struct traverse_data *td_main = arg; 29688b7b0f2SMatthew Ahrens struct traverse_data td = *td_main; 29788b7b0f2SMatthew Ahrens zbookmark_t czb; 298fa9e4066Sahrens 29988b7b0f2SMatthew Ahrens td.td_func = traverse_prefetcher; 30088b7b0f2SMatthew Ahrens td.td_arg = td_main->td_pfd; 30188b7b0f2SMatthew Ahrens td.td_pfd = NULL; 302fa9e4066Sahrens 303*b24ab676SJeff Bonwick SET_BOOKMARK(&czb, td.td_objset, 304*b24ab676SJeff Bonwick ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 30588b7b0f2SMatthew Ahrens (void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb); 306fa9e4066Sahrens 30788b7b0f2SMatthew Ahrens mutex_enter(&td_main->td_pfd->pd_mtx); 30888b7b0f2SMatthew Ahrens td_main->td_pfd->pd_exited = B_TRUE; 30988b7b0f2SMatthew Ahrens cv_broadcast(&td_main->td_pfd->pd_cv); 31088b7b0f2SMatthew Ahrens mutex_exit(&td_main->td_pfd->pd_mtx); 311fa9e4066Sahrens } 312fa9e4066Sahrens 31388b7b0f2SMatthew Ahrens /* 31488b7b0f2SMatthew Ahrens * NB: dataset must not be changing on-disk (eg, is a snapshot or we are 31588b7b0f2SMatthew Ahrens * in syncing context). 31688b7b0f2SMatthew Ahrens */ 31788b7b0f2SMatthew Ahrens static int 31888b7b0f2SMatthew Ahrens traverse_impl(spa_t *spa, uint64_t objset, blkptr_t *rootbp, 31988b7b0f2SMatthew Ahrens uint64_t txg_start, int flags, blkptr_cb_t func, void *arg) 320fa9e4066Sahrens { 32188b7b0f2SMatthew Ahrens struct traverse_data td; 32288b7b0f2SMatthew Ahrens struct prefetch_data pd = { 0 }; 32388b7b0f2SMatthew Ahrens zbookmark_t czb; 32488b7b0f2SMatthew Ahrens int err; 325fa9e4066Sahrens 32688b7b0f2SMatthew Ahrens td.td_spa = spa; 32788b7b0f2SMatthew Ahrens td.td_objset = objset; 32888b7b0f2SMatthew Ahrens td.td_rootbp = rootbp; 32988b7b0f2SMatthew Ahrens td.td_min_txg = txg_start; 33088b7b0f2SMatthew Ahrens td.td_func = func; 33188b7b0f2SMatthew Ahrens td.td_arg = arg; 33288b7b0f2SMatthew Ahrens td.td_pfd = &pd; 33388b7b0f2SMatthew Ahrens td.td_flags = flags; 33488b7b0f2SMatthew Ahrens 33588b7b0f2SMatthew Ahrens pd.pd_blks_max = 100; 33688b7b0f2SMatthew Ahrens pd.pd_flags = flags; 33788b7b0f2SMatthew Ahrens mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL); 33888b7b0f2SMatthew Ahrens cv_init(&pd.pd_cv, NULL, CV_DEFAULT, NULL); 33988b7b0f2SMatthew Ahrens 34088b7b0f2SMatthew Ahrens if (!(flags & TRAVERSE_PREFETCH) || 34188b7b0f2SMatthew Ahrens 0 == taskq_dispatch(system_taskq, traverse_prefetch_thread, 34288b7b0f2SMatthew Ahrens &td, TQ_NOQUEUE)) 34388b7b0f2SMatthew Ahrens pd.pd_exited = B_TRUE; 34488b7b0f2SMatthew Ahrens 345*b24ab676SJeff Bonwick SET_BOOKMARK(&czb, objset, 346*b24ab676SJeff Bonwick ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); 34788b7b0f2SMatthew Ahrens err = traverse_visitbp(&td, NULL, NULL, rootbp, &czb); 34888b7b0f2SMatthew Ahrens 34988b7b0f2SMatthew Ahrens mutex_enter(&pd.pd_mtx); 35088b7b0f2SMatthew Ahrens pd.pd_cancel = B_TRUE; 35188b7b0f2SMatthew Ahrens cv_broadcast(&pd.pd_cv); 35288b7b0f2SMatthew Ahrens while (!pd.pd_exited) 35388b7b0f2SMatthew Ahrens cv_wait(&pd.pd_cv, &pd.pd_mtx); 35488b7b0f2SMatthew Ahrens mutex_exit(&pd.pd_mtx); 35588b7b0f2SMatthew Ahrens 35688b7b0f2SMatthew Ahrens mutex_destroy(&pd.pd_mtx); 35788b7b0f2SMatthew Ahrens cv_destroy(&pd.pd_cv); 358fa9e4066Sahrens 35988b7b0f2SMatthew Ahrens return (err); 360fa9e4066Sahrens } 361fa9e4066Sahrens 36288b7b0f2SMatthew Ahrens /* 36388b7b0f2SMatthew Ahrens * NB: dataset must not be changing on-disk (eg, is a snapshot or we are 36488b7b0f2SMatthew Ahrens * in syncing context). 36588b7b0f2SMatthew Ahrens */ 36688b7b0f2SMatthew Ahrens int 36788b7b0f2SMatthew Ahrens traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags, 36888b7b0f2SMatthew Ahrens blkptr_cb_t func, void *arg) 369fa9e4066Sahrens { 37088b7b0f2SMatthew Ahrens return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds->ds_object, 37188b7b0f2SMatthew Ahrens &ds->ds_phys->ds_bp, txg_start, flags, func, arg)); 372fa9e4066Sahrens } 373fa9e4066Sahrens 37488b7b0f2SMatthew Ahrens /* 37588b7b0f2SMatthew Ahrens * NB: pool must not be changing on-disk (eg, from zdb or sync context). 37688b7b0f2SMatthew Ahrens */ 37788b7b0f2SMatthew Ahrens int 378468c413aSTim Haley traverse_pool(spa_t *spa, blkptr_cb_t func, void *arg, uint64_t txg_start) 379fa9e4066Sahrens { 38088b7b0f2SMatthew Ahrens int err; 38188b7b0f2SMatthew Ahrens uint64_t obj; 38288b7b0f2SMatthew Ahrens dsl_pool_t *dp = spa_get_dsl(spa); 38388b7b0f2SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 38488b7b0f2SMatthew Ahrens 38588b7b0f2SMatthew Ahrens /* visit the MOS */ 38688b7b0f2SMatthew Ahrens err = traverse_impl(spa, 0, spa_get_rootblkptr(spa), 387468c413aSTim Haley txg_start, TRAVERSE_PRE | TRAVERSE_PREFETCH, func, arg); 38888b7b0f2SMatthew Ahrens if (err) 38988b7b0f2SMatthew Ahrens return (err); 39088b7b0f2SMatthew Ahrens 39188b7b0f2SMatthew Ahrens /* visit each dataset */ 392468c413aSTim Haley for (obj = 1; err == 0; err = dmu_object_next(mos, &obj, FALSE, 393468c413aSTim Haley txg_start)) { 39488b7b0f2SMatthew Ahrens dmu_object_info_t doi; 39588b7b0f2SMatthew Ahrens 39688b7b0f2SMatthew Ahrens err = dmu_object_info(mos, obj, &doi); 39788b7b0f2SMatthew Ahrens if (err) 39888b7b0f2SMatthew Ahrens return (err); 39988b7b0f2SMatthew Ahrens 40088b7b0f2SMatthew Ahrens if (doi.doi_type == DMU_OT_DSL_DATASET) { 40188b7b0f2SMatthew Ahrens dsl_dataset_t *ds; 402468c413aSTim Haley uint64_t txg = txg_start; 403468c413aSTim Haley 40488b7b0f2SMatthew Ahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 40588b7b0f2SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 40688b7b0f2SMatthew Ahrens rw_exit(&dp->dp_config_rwlock); 40788b7b0f2SMatthew Ahrens if (err) 40888b7b0f2SMatthew Ahrens return (err); 409468c413aSTim Haley if (ds->ds_phys->ds_prev_snap_txg > txg) 410468c413aSTim Haley txg = ds->ds_phys->ds_prev_snap_txg; 411468c413aSTim Haley err = traverse_dataset(ds, txg, 412468c413aSTim Haley TRAVERSE_PRE | TRAVERSE_PREFETCH, func, arg); 41388b7b0f2SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 41488b7b0f2SMatthew Ahrens if (err) 41588b7b0f2SMatthew Ahrens return (err); 41688b7b0f2SMatthew Ahrens } 417fa9e4066Sahrens } 41888b7b0f2SMatthew Ahrens if (err == ESRCH) 41988b7b0f2SMatthew Ahrens err = 0; 42088b7b0f2SMatthew Ahrens return (err); 421fa9e4066Sahrens } 422