Date: Mon, 15 Aug 2016 09:12:54 +0000 (UTC) From: Andriy Gapon <avg@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: r304135 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201608150912.u7F9Csos065185@repo.freebsd.org>
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Author: avg Date: Mon Aug 15 09:12:54 2016 New Revision: 304135 URL: https://svnweb.freebsd.org/changeset/base/304135 Log: MFC r302836: 6874 rollback and receive need to reset ZPL state to what's on disk Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Mon Aug 15 09:09:01 2016 (r304134) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Mon Aug 15 09:12:54 2016 (r304135) @@ -22,7 +22,7 @@ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. * All rights reserved. - * Copyright (c) 2012, 2014 by Delphix. All rights reserved. + * Copyright (c) 2012, 2015 by Delphix. All rights reserved. * Copyright (c) 2014 Integros [integros.com] */ @@ -847,72 +847,46 @@ zfs_owner_overquota(zfsvfs_t *zfsvfs, zn return (zfs_fuid_overquota(zfsvfs, isgroup, fuid)); } -int -zfsvfs_create(const char *osname, zfsvfs_t **zfvp) +/* + * Associate this zfsvfs with the given objset, which must be owned. + * This will cache a bunch of on-disk state from the objset in the + * zfsvfs. + */ +static int +zfsvfs_init(zfsvfs_t *zfsvfs, objset_t *os) { - objset_t *os; - zfsvfs_t *zfsvfs; - uint64_t zval; - int i, error; - uint64_t sa_obj; - - /* - * XXX: Fix struct statfs so this isn't necessary! - * - * The 'osname' is used as the filesystem's special node, which means - * it must fit in statfs.f_mntfromname, or else it can't be - * enumerated, so libzfs_mnttab_find() returns NULL, which causes - * 'zfs unmount' to think it's not mounted when it is. - */ - if (strlen(osname) >= MNAMELEN) - return (SET_ERROR(ENAMETOOLONG)); - - zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); - - /* - * We claim to always be readonly so we can open snapshots; - * other ZPL code will prevent us from writing to snapshots. - */ - error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); - if (error) { - kmem_free(zfsvfs, sizeof (zfsvfs_t)); - return (error); - } + int error; + uint64_t val; - /* - * Initialize the zfs-specific filesystem structure. - * Should probably make this a kmem cache, shuffle fields, - * and just bzero up to z_hold_mtx[]. - */ - zfsvfs->z_vfs = NULL; - zfsvfs->z_parent = zfsvfs; zfsvfs->z_max_blksz = SPA_OLD_MAXBLOCKSIZE; zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; zfsvfs->z_os = os; error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); - if (error) { - goto out; - } else if (zfsvfs->z_version > + if (error != 0) + return (error); + if (zfsvfs->z_version > zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { (void) printf("Can't mount a version %lld file system " "on a version %lld pool\n. Pool must be upgraded to mount " "this file system.", (u_longlong_t)zfsvfs->z_version, (u_longlong_t)spa_version(dmu_objset_spa(os))); - error = SET_ERROR(ENOTSUP); - goto out; + return (SET_ERROR(ENOTSUP)); } - if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) - goto out; - zfsvfs->z_norm = (int)zval; + error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &val); + if (error != 0) + return (error); + zfsvfs->z_norm = (int)val; - if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) - goto out; - zfsvfs->z_utf8 = (zval != 0); + error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &val); + if (error != 0) + return (error); + zfsvfs->z_utf8 = (val != 0); - if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) - goto out; - zfsvfs->z_case = (uint_t)zval; + error = zfs_get_zplprop(os, ZFS_PROP_CASE, &val); + if (error != 0) + return (error); + zfsvfs->z_case = (uint_t)val; /* * Fold case on file systems that are always or sometimes case @@ -925,60 +899,99 @@ zfsvfs_create(const char *osname, zfsvfs zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); + uint64_t sa_obj = 0; if (zfsvfs->z_use_sa) { /* should either have both of these objects or none */ error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj); - if (error) - goto out; - } else { - /* - * Pre SA versions file systems should never touch - * either the attribute registration or layout objects. - */ - sa_obj = 0; + if (error != 0) + return (error); } error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table); - if (error) - goto out; + if (error != 0) + return (error); if (zfsvfs->z_version >= ZPL_VERSION_SA) sa_register_update_callback(os, zfs_sa_upgrade); error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &zfsvfs->z_root); - if (error) - goto out; + if (error != 0) + return (error); ASSERT(zfsvfs->z_root != 0); error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, &zfsvfs->z_unlinkedobj); - if (error) - goto out; + if (error != 0) + return (error); error = zap_lookup(os, MASTER_NODE_OBJ, zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], 8, 1, &zfsvfs->z_userquota_obj); - if (error && error != ENOENT) - goto out; + if (error == ENOENT) + zfsvfs->z_userquota_obj = 0; + else if (error != 0) + return (error); error = zap_lookup(os, MASTER_NODE_OBJ, zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], 8, 1, &zfsvfs->z_groupquota_obj); - if (error && error != ENOENT) - goto out; + if (error == ENOENT) + zfsvfs->z_groupquota_obj = 0; + else if (error != 0) + return (error); error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, &zfsvfs->z_fuid_obj); - if (error && error != ENOENT) - goto out; + if (error == ENOENT) + zfsvfs->z_fuid_obj = 0; + else if (error != 0) + return (error); error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, &zfsvfs->z_shares_dir); - if (error && error != ENOENT) - goto out; + if (error == ENOENT) + zfsvfs->z_shares_dir = 0; + else if (error != 0) + return (error); + + return (0); +} + +int +zfsvfs_create(const char *osname, zfsvfs_t **zfvp) +{ + objset_t *os; + zfsvfs_t *zfsvfs; + int error; + + /* + * XXX: Fix struct statfs so this isn't necessary! + * + * The 'osname' is used as the filesystem's special node, which means + * it must fit in statfs.f_mntfromname, or else it can't be + * enumerated, so libzfs_mnttab_find() returns NULL, which causes + * 'zfs unmount' to think it's not mounted when it is. + */ + if (strlen(osname) >= MNAMELEN) + return (SET_ERROR(ENAMETOOLONG)); + + zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); + + /* + * We claim to always be readonly so we can open snapshots; + * other ZPL code will prevent us from writing to snapshots. + */ + error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); + if (error) { + kmem_free(zfsvfs, sizeof (zfsvfs_t)); + return (error); + } + + zfsvfs->z_vfs = NULL; + zfsvfs->z_parent = zfsvfs; mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); @@ -987,17 +1000,19 @@ zfsvfs_create(const char *osname, zfsvfs rrm_init(&zfsvfs->z_teardown_lock, B_FALSE); rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); - for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) + for (int i = 0; i != ZFS_OBJ_MTX_SZ; i++) mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); + error = zfsvfs_init(zfsvfs, os); + if (error != 0) { + dmu_objset_disown(os, zfsvfs); + *zfvp = NULL; + kmem_free(zfsvfs, sizeof (zfsvfs_t)); + return (error); + } + *zfvp = zfsvfs; return (0); - -out: - dmu_objset_disown(os, zfsvfs); - *zfvp = NULL; - kmem_free(zfsvfs, sizeof (zfsvfs_t)); - return (error); } static int @@ -2199,7 +2214,6 @@ zfs_resume_fs(zfsvfs_t *zfsvfs, const ch { int err; znode_t *zp; - uint64_t sa_obj = 0; ASSERT(RRM_WRITE_HELD(&zfsvfs->z_teardown_lock)); ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); @@ -2208,35 +2222,16 @@ zfs_resume_fs(zfsvfs_t *zfsvfs, const ch * We already own this, so just hold and rele it to update the * objset_t, as the one we had before may have been evicted. */ - VERIFY0(dmu_objset_hold(osname, zfsvfs, &zfsvfs->z_os)); - VERIFY3P(zfsvfs->z_os->os_dsl_dataset->ds_owner, ==, zfsvfs); - VERIFY(dsl_dataset_long_held(zfsvfs->z_os->os_dsl_dataset)); - dmu_objset_rele(zfsvfs->z_os, zfsvfs); - - /* - * Make sure version hasn't changed - */ - - err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION, - &zfsvfs->z_version); - - if (err) - goto bail; - - err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, - ZFS_SA_ATTRS, 8, 1, &sa_obj); - - if (err && zfsvfs->z_version >= ZPL_VERSION_SA) - goto bail; + objset_t *os; + VERIFY0(dmu_objset_hold(osname, zfsvfs, &os)); + VERIFY3P(os->os_dsl_dataset->ds_owner, ==, zfsvfs); + VERIFY(dsl_dataset_long_held(os->os_dsl_dataset)); + dmu_objset_rele(os, zfsvfs); - if ((err = sa_setup(zfsvfs->z_os, sa_obj, - zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0) + err = zfsvfs_init(zfsvfs, os); + if (err != 0) goto bail; - if (zfsvfs->z_version >= ZPL_VERSION_SA) - sa_register_update_callback(zfsvfs->z_os, - zfs_sa_upgrade); - VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); zfs_set_fuid_feature(zfsvfs);
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