X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fdmu_traverse.c;h=429c76ae11f12e2a40c9f55a250aa5643dc04f60;hb=428870ff734fdaccc342b33fc53cf94724409a46;hp=89cbfad29f841c35281efe68e937bfd0d97d0d8c;hpb=9babb37438b58e77bad04e820d5702e15b79e6a6;p=zfs.git diff --git a/module/zfs/dmu_traverse.c b/module/zfs/dmu_traverse.c index 89cbfad..429c76a 100644 --- a/module/zfs/dmu_traverse.c +++ b/module/zfs/dmu_traverse.c @@ -19,8 +19,7 @@ * CDDL HEADER END */ /* - * Copyright 2009 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. */ #include @@ -33,16 +32,10 @@ #include #include #include +#include +#include #include -#define SET_BOOKMARK(zb, objset, object, level, blkid) \ -{ \ - (zb)->zb_objset = objset; \ - (zb)->zb_object = object; \ - (zb)->zb_level = level; \ - (zb)->zb_blkid = blkid; \ -} - struct prefetch_data { kmutex_t pd_mtx; kcondvar_t pd_cv; @@ -68,27 +61,28 @@ static int traverse_dnode(struct traverse_data *td, const dnode_phys_t *dnp, arc_buf_t *buf, uint64_t objset, uint64_t object); /* ARGSUSED */ -static void +static int traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) { struct traverse_data *td = arg; zbookmark_t zb; if (bp->blk_birth == 0) - return; + return (0); if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa)) - return; + return (0); + + SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, + bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); + + (void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL, td->td_arg); - zb.zb_objset = td->td_objset; - zb.zb_object = 0; - zb.zb_level = -1; - zb.zb_blkid = bp->blk_cksum.zc_word[ZIL_ZC_SEQ]; - VERIFY(0 == td->td_func(td->td_spa, bp, &zb, NULL, td->td_arg)); + return (0); } /* ARGSUSED */ -static void +static int traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) { struct traverse_data *td = arg; @@ -99,17 +93,18 @@ traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) zbookmark_t zb; if (bp->blk_birth == 0) - return; + return (0); if (claim_txg == 0 || bp->blk_birth < claim_txg) - return; + return (0); - zb.zb_objset = td->td_objset; - zb.zb_object = lr->lr_foid; - zb.zb_level = BP_GET_LEVEL(bp); - zb.zb_blkid = lr->lr_offset / BP_GET_LSIZE(bp); - VERIFY(0 == td->td_func(td->td_spa, bp, &zb, NULL, td->td_arg)); + SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, ZB_ZIL_LEVEL, + lr->lr_offset / BP_GET_LSIZE(bp)); + + (void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL, + td->td_arg); } + return (0); } static void @@ -120,7 +115,7 @@ traverse_zil(struct traverse_data *td, zil_header_t *zh) /* * We only want to visit blocks that have been claimed but not yet - * replayed (or, in read-only mode, blocks that *would* be claimed). + * replayed; plus, in read-only mode, blocks that are already stable. */ if (claim_txg == 0 && spa_writeable(td->td_spa)) return; @@ -138,12 +133,14 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb) { zbookmark_t czb; - int err = 0; + int err = 0, lasterr = 0; arc_buf_t *buf = NULL; struct prefetch_data *pd = td->td_pfd; + boolean_t hard = td->td_flags & TRAVERSE_HARD; if (bp->blk_birth == 0) { - err = td->td_func(td->td_spa, NULL, zb, dnp, td->td_arg); + err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp, + td->td_arg); return (err); } @@ -163,7 +160,8 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, } if (td->td_flags & TRAVERSE_PRE) { - err = td->td_func(td->td_spa, bp, zb, dnp, td->td_arg); + err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp, + td->td_arg); if (err) return (err); } @@ -174,7 +172,7 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, blkptr_t *cbp; int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; - err = arc_read(NULL, td->td_spa, bp, pbuf, + err = dsl_read(NULL, td->td_spa, bp, pbuf, arc_getbuf_func, &buf, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); if (err) @@ -187,15 +185,18 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, zb->zb_level - 1, zb->zb_blkid * epb + i); err = traverse_visitbp(td, dnp, buf, cbp, &czb); - if (err) - break; + if (err) { + if (!hard) + break; + lasterr = err; + } } } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { uint32_t flags = ARC_WAIT; int i; int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; - err = arc_read(NULL, td->td_spa, bp, pbuf, + err = dsl_read(NULL, td->td_spa, bp, pbuf, arc_getbuf_func, &buf, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); if (err) @@ -203,18 +204,21 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, /* recursively visitbp() blocks below this */ dnp = buf->b_data; - for (i = 0; i < epb && err == 0; i++, dnp++) { + for (i = 0; i < epb; i++, dnp++) { err = traverse_dnode(td, dnp, buf, zb->zb_objset, zb->zb_blkid * epb + i); - if (err) - break; + if (err) { + if (!hard) + break; + lasterr = err; + } } } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { uint32_t flags = ARC_WAIT; objset_phys_t *osp; dnode_phys_t *dnp; - err = arc_read_nolock(NULL, td->td_spa, bp, + err = dsl_read_nolock(NULL, td->td_spa, bp, arc_getbuf_func, &buf, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); if (err) @@ -224,12 +228,21 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, traverse_zil(td, &osp->os_zil_header); dnp = &osp->os_meta_dnode; - err = traverse_dnode(td, dnp, buf, zb->zb_objset, 0); + err = traverse_dnode(td, dnp, buf, zb->zb_objset, + DMU_META_DNODE_OBJECT); + if (err && hard) { + lasterr = err; + err = 0; + } if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { dnp = &osp->os_userused_dnode; err = traverse_dnode(td, dnp, buf, zb->zb_objset, DMU_USERUSED_OBJECT); } + if (err && hard) { + lasterr = err; + err = 0; + } if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { dnp = &osp->os_groupused_dnode; err = traverse_dnode(td, dnp, buf, zb->zb_objset, @@ -240,33 +253,52 @@ traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp, if (buf) (void) arc_buf_remove_ref(buf, &buf); - if (err == 0 && (td->td_flags & TRAVERSE_POST)) - err = td->td_func(td->td_spa, bp, zb, dnp, td->td_arg); + if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) { + err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp, + td->td_arg); + } - return (err); + return (err != 0 ? err : lasterr); } static int traverse_dnode(struct traverse_data *td, const dnode_phys_t *dnp, arc_buf_t *buf, uint64_t objset, uint64_t object) { - int j, err = 0; + int j, err = 0, lasterr = 0; zbookmark_t czb; + boolean_t hard = (td->td_flags & TRAVERSE_HARD); for (j = 0; j < dnp->dn_nblkptr; j++) { SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); err = traverse_visitbp(td, dnp, buf, (blkptr_t *)&dnp->dn_blkptr[j], &czb); - if (err) - break; + if (err) { + if (!hard) + break; + lasterr = err; + } } - return (err); + + if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { + SET_BOOKMARK(&czb, objset, + object, 0, DMU_SPILL_BLKID); + err = traverse_visitbp(td, dnp, buf, + (blkptr_t *)&dnp->dn_spill, &czb); + if (err) { + if (!hard) + return (err); + lasterr = err; + } + } + return (err != 0 ? err : lasterr); } /* ARGSUSED */ static int -traverse_prefetcher(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, - const dnode_phys_t *dnp, void *arg) +traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, + arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp, + void *arg) { struct prefetch_data *pfd = arg; uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH; @@ -276,7 +308,8 @@ traverse_prefetcher(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, return (EINTR); if (bp == NULL || !((pfd->pd_flags & TRAVERSE_PREFETCH_DATA) || - BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) + BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0) || + BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) return (0); mutex_enter(&pfd->pd_mtx); @@ -286,7 +319,7 @@ traverse_prefetcher(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, cv_broadcast(&pfd->pd_cv); mutex_exit(&pfd->pd_mtx); - (void) arc_read_nolock(NULL, spa, bp, NULL, NULL, + (void) dsl_read(NULL, spa, bp, pbuf, NULL, NULL, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, &aflags, zb); @@ -305,7 +338,8 @@ traverse_prefetch_thread(void *arg) td.td_arg = td_main->td_pfd; td.td_pfd = NULL; - SET_BOOKMARK(&czb, td.td_objset, 0, -1, 0); + SET_BOOKMARK(&czb, td.td_objset, + ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); (void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb); mutex_enter(&td_main->td_pfd->pd_mtx); @@ -346,7 +380,8 @@ traverse_impl(spa_t *spa, uint64_t objset, blkptr_t *rootbp, &td, TQ_NOQUEUE)) pd.pd_exited = B_TRUE; - SET_BOOKMARK(&czb, objset, 0, -1, 0); + SET_BOOKMARK(&czb, objset, + ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); err = traverse_visitbp(&td, NULL, NULL, rootbp, &czb); mutex_enter(&pd.pd_mtx); @@ -378,43 +413,59 @@ traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags, * NB: pool must not be changing on-disk (eg, from zdb or sync context). */ int -traverse_pool(spa_t *spa, blkptr_cb_t func, void *arg) +traverse_pool(spa_t *spa, uint64_t txg_start, int flags, + blkptr_cb_t func, void *arg) { - int err; + int err, lasterr = 0; uint64_t obj; dsl_pool_t *dp = spa_get_dsl(spa); objset_t *mos = dp->dp_meta_objset; + boolean_t hard = (flags & TRAVERSE_HARD); /* visit the MOS */ err = traverse_impl(spa, 0, spa_get_rootblkptr(spa), - 0, TRAVERSE_PRE, func, arg); + txg_start, flags, func, arg); if (err) return (err); /* visit each dataset */ - for (obj = 1; err == 0; err = dmu_object_next(mos, &obj, FALSE, 0)) { + for (obj = 1; err == 0 || (err != ESRCH && hard); + err = dmu_object_next(mos, &obj, FALSE, txg_start)) { dmu_object_info_t doi; err = dmu_object_info(mos, obj, &doi); - if (err) - return (err); + if (err) { + if (!hard) + return (err); + lasterr = err; + continue; + } if (doi.doi_type == DMU_OT_DSL_DATASET) { dsl_dataset_t *ds; + uint64_t txg = txg_start; + rw_enter(&dp->dp_config_rwlock, RW_READER); err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); rw_exit(&dp->dp_config_rwlock); - if (err) - return (err); - err = traverse_dataset(ds, - ds->ds_phys->ds_prev_snap_txg, TRAVERSE_PRE, - func, arg); + if (err) { + if (!hard) + return (err); + lasterr = err; + continue; + } + if (ds->ds_phys->ds_prev_snap_txg > txg) + txg = ds->ds_phys->ds_prev_snap_txg; + err = traverse_dataset(ds, txg, flags, func, arg); dsl_dataset_rele(ds, FTAG); - if (err) - return (err); + if (err) { + if (!hard) + return (err); + lasterr = err; + } } } if (err == ESRCH) err = 0; - return (err); + return (err != 0 ? err : lasterr); }