Date: Fri, 23 Jan 2015 00:44:15 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r277553 - in stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys Message-ID: <201501230044.t0N0iFNq020002@svn.freebsd.org>
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Author: delphij Date: Fri Jan 23 00:44:14 2015 New Revision: 277553 URL: https://svnweb.freebsd.org/changeset/base/277553 Log: MFC r275594: MFV r275540: When importing a pool, don't assume that the passed pool configuration at vdev_load is always vaild. It's possible that a stale configuration that comes with extra vdevs, where metaslab_init() would fail because of lower layer returns error. Change the code to make metaslab_init() handle and return errors from lower layer and pass it back to upper layer and handle it there. Illumos issue: 5213 panic in metaslab_init due to space_map_open returning ENXIO Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/metaslab.h stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c Fri Jan 23 00:40:43 2015 (r277552) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c Fri Jan 23 00:44:14 2015 (r277553) @@ -1318,28 +1318,36 @@ metaslab_unload(metaslab_t *msp) msp->ms_weight &= ~METASLAB_ACTIVE_MASK; } -metaslab_t * -metaslab_init(metaslab_group_t *mg, uint64_t id, uint64_t object, uint64_t txg) +int +metaslab_init(metaslab_group_t *mg, uint64_t id, uint64_t object, uint64_t txg, + metaslab_t **msp) { vdev_t *vd = mg->mg_vd; objset_t *mos = vd->vdev_spa->spa_meta_objset; - metaslab_t *msp; + metaslab_t *ms; + int error; - msp = kmem_zalloc(sizeof (metaslab_t), KM_SLEEP); - mutex_init(&msp->ms_lock, NULL, MUTEX_DEFAULT, NULL); - cv_init(&msp->ms_load_cv, NULL, CV_DEFAULT, NULL); - msp->ms_id = id; - msp->ms_start = id << vd->vdev_ms_shift; - msp->ms_size = 1ULL << vd->vdev_ms_shift; + ms = kmem_zalloc(sizeof (metaslab_t), KM_SLEEP); + mutex_init(&ms->ms_lock, NULL, MUTEX_DEFAULT, NULL); + cv_init(&ms->ms_load_cv, NULL, CV_DEFAULT, NULL); + ms->ms_id = id; + ms->ms_start = id << vd->vdev_ms_shift; + ms->ms_size = 1ULL << vd->vdev_ms_shift; /* * We only open space map objects that already exist. All others * will be opened when we finally allocate an object for it. */ if (object != 0) { - VERIFY0(space_map_open(&msp->ms_sm, mos, object, msp->ms_start, - msp->ms_size, vd->vdev_ashift, &msp->ms_lock)); - ASSERT(msp->ms_sm != NULL); + error = space_map_open(&ms->ms_sm, mos, object, ms->ms_start, + ms->ms_size, vd->vdev_ashift, &ms->ms_lock); + + if (error != 0) { + kmem_free(ms, sizeof (metaslab_t)); + return (error); + } + + ASSERT(ms->ms_sm != NULL); } /* @@ -1349,11 +1357,11 @@ metaslab_init(metaslab_group_t *mg, uint * addition of new space; and for debugging, it ensures that we'd * data fault on any attempt to use this metaslab before it's ready. */ - msp->ms_tree = range_tree_create(&metaslab_rt_ops, msp, &msp->ms_lock); - metaslab_group_add(mg, msp); + ms->ms_tree = range_tree_create(&metaslab_rt_ops, ms, &ms->ms_lock); + metaslab_group_add(mg, ms); - msp->ms_fragmentation = metaslab_fragmentation(msp); - msp->ms_ops = mg->mg_class->mc_ops; + ms->ms_fragmentation = metaslab_fragmentation(ms); + ms->ms_ops = mg->mg_class->mc_ops; /* * If we're opening an existing pool (txg == 0) or creating @@ -1362,25 +1370,27 @@ metaslab_init(metaslab_group_t *mg, uint * does not become available until after this txg has synced. */ if (txg <= TXG_INITIAL) - metaslab_sync_done(msp, 0); + metaslab_sync_done(ms, 0); /* * If metaslab_debug_load is set and we're initializing a metaslab * that has an allocated space_map object then load the its space * map so that can verify frees. */ - if (metaslab_debug_load && msp->ms_sm != NULL) { - mutex_enter(&msp->ms_lock); - VERIFY0(metaslab_load(msp)); - mutex_exit(&msp->ms_lock); + if (metaslab_debug_load && ms->ms_sm != NULL) { + mutex_enter(&ms->ms_lock); + VERIFY0(metaslab_load(ms)); + mutex_exit(&ms->ms_lock); } if (txg != 0) { vdev_dirty(vd, 0, NULL, txg); - vdev_dirty(vd, VDD_METASLAB, msp, txg); + vdev_dirty(vd, VDD_METASLAB, ms, txg); } - return (msp); + *msp = ms; + + return (0); } void Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/metaslab.h ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/metaslab.h Fri Jan 23 00:40:43 2015 (r277552) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/metaslab.h Fri Jan 23 00:44:14 2015 (r277553) @@ -42,8 +42,8 @@ typedef struct metaslab_ops { extern metaslab_ops_t *zfs_metaslab_ops; -metaslab_t *metaslab_init(metaslab_group_t *, uint64_t, - uint64_t, uint64_t); +int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t, + metaslab_t **); void metaslab_fini(metaslab_t *); void metaslab_load_wait(metaslab_t *); Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c Fri Jan 23 00:40:43 2015 (r277552) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c Fri Jan 23 00:44:14 2015 (r277553) @@ -955,7 +955,11 @@ vdev_metaslab_init(vdev_t *vd, uint64_t if (error) return (error); } - vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, m, object, txg); + + error = metaslab_init(vd->vdev_mg, m, object, txg, + &(vd->vdev_ms[m])); + if (error) + return (error); } if (txg == 0)
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