diff --git a/include/sys/zfs_znode.h b/include/sys/zfs_znode.h index 8e563a572e96..661628698627 100644 --- a/include/sys/zfs_znode.h +++ b/include/sys/zfs_znode.h @@ -197,7 +197,6 @@ typedef struct znode { zfs_acl_t *z_acl_cached; /* cached acl */ krwlock_t z_xattr_lock; /* xattr data lock */ nvlist_t *z_xattr_cached; /* cached xattrs */ - struct znode *z_xattr_parent; /* xattr parent znode */ list_node_t z_link_node; /* all znodes in fs link */ sa_handle_t *z_sa_hdl; /* handle to sa data */ boolean_t z_is_sa; /* are we native sa? */ diff --git a/module/zfs/zfs_acl.c b/module/zfs/zfs_acl.c index f820cdfd612b..a53cd870c9c6 100644 --- a/module/zfs/zfs_acl.c +++ b/module/zfs/zfs_acl.c @@ -2471,53 +2471,33 @@ zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) { uint32_t working_mode; int error; + int is_attr; boolean_t check_privs; + znode_t *xzp; znode_t *check_zp = zp; mode_t needed_bits; uid_t owner; + is_attr = ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode)); + /* * If attribute then validate against base file */ - if ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode)) { + if (is_attr) { uint64_t parent; - rw_enter(&zp->z_xattr_lock, RW_READER); - if (zp->z_xattr_parent) { - check_zp = zp->z_xattr_parent; - rw_exit(&zp->z_xattr_lock); - - /* - * Verify a lookup yields the same znode. - */ - ASSERT3S(sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT( - ZTOZSB(zp)), &parent, sizeof (parent)), ==, 0); - ASSERT3U(check_zp->z_id, ==, parent); - } else { - rw_exit(&zp->z_xattr_lock); - - error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT( - ZTOZSB(zp)), &parent, sizeof (parent)); - if (error) - return (error); + if ((error = sa_lookup(zp->z_sa_hdl, + SA_ZPL_PARENT(ZTOZSB(zp)), &parent, + sizeof (parent))) != 0) + return (error); - /* - * Cache the lookup on the parent file znode as - * zp->z_xattr_parent and hold a reference. This - * effectively pins the parent in memory until all - * child xattr znodes have been destroyed and - * release their references in zfs_inode_destroy(). - */ - error = zfs_zget(ZTOZSB(zp), parent, &check_zp); - if (error) - return (error); - - rw_enter(&zp->z_xattr_lock, RW_WRITER); - if (zp->z_xattr_parent == NULL) - zp->z_xattr_parent = check_zp; - rw_exit(&zp->z_xattr_lock); + if ((error = zfs_zget(ZTOZSB(zp), + parent, &xzp)) != 0) { + return (error); } + check_zp = xzp; + /* * fixup mode to map to xattr perms */ @@ -2559,11 +2539,15 @@ zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) if ((error = zfs_zaccess_common(check_zp, mode, &working_mode, &check_privs, skipaclchk, cr)) == 0) { + if (is_attr) + iput(ZTOI(xzp)); return (secpolicy_vnode_access2(cr, ZTOI(zp), owner, needed_bits, needed_bits)); } if (error && !check_privs) { + if (is_attr) + iput(ZTOI(xzp)); return (error); } @@ -2624,6 +2608,8 @@ zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) needed_bits, needed_bits); } + if (is_attr) + iput(ZTOI(xzp)); return (error); } diff --git a/module/zfs/zfs_znode.c b/module/zfs/zfs_znode.c index 310d4827b5b6..12d805e1714c 100644 --- a/module/zfs/zfs_znode.c +++ b/module/zfs/zfs_znode.c @@ -119,7 +119,6 @@ zfs_znode_cache_constructor(void *buf, void *arg, int kmflags) zp->z_dirlocks = NULL; zp->z_acl_cached = NULL; zp->z_xattr_cached = NULL; - zp->z_xattr_parent = NULL; zp->z_moved = 0; return (0); } @@ -141,7 +140,6 @@ zfs_znode_cache_destructor(void *buf, void *arg) ASSERT(zp->z_dirlocks == NULL); ASSERT(zp->z_acl_cached == NULL); ASSERT(zp->z_xattr_cached == NULL); - ASSERT(zp->z_xattr_parent == NULL); } static int @@ -433,11 +431,6 @@ zfs_inode_destroy(struct inode *ip) zp->z_xattr_cached = NULL; } - if (zp->z_xattr_parent) { - zfs_iput_async(ZTOI(zp->z_xattr_parent)); - zp->z_xattr_parent = NULL; - } - kmem_cache_free(znode_cache, zp); } @@ -603,7 +596,6 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz, ASSERT(zp->z_dirlocks == NULL); ASSERT3P(zp->z_acl_cached, ==, NULL); ASSERT3P(zp->z_xattr_cached, ==, NULL); - ASSERT3P(zp->z_xattr_parent, ==, NULL); zp->z_moved = 0; zp->z_sa_hdl = NULL; zp->z_unlinked = 0; @@ -645,14 +637,6 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz, zp->z_mode = mode; ip->i_generation = (uint32_t)tmp_gen; - /* - * xattr znodes hold a reference on their unique parent - */ - if (dip && zp->z_pflags & ZFS_XATTR) { - igrab(dip); - zp->z_xattr_parent = ITOZ(dip); - } - ip->i_ino = obj; zfs_inode_update_new(zp); zfs_inode_set_ops(zsb, ip); @@ -1200,11 +1184,6 @@ zfs_rezget(znode_t *zp) nvlist_free(zp->z_xattr_cached); zp->z_xattr_cached = NULL; } - - if (zp->z_xattr_parent) { - zfs_iput_async(ZTOI(zp->z_xattr_parent)); - zp->z_xattr_parent = NULL; - } rw_exit(&zp->z_xattr_lock); ASSERT(zp->z_sa_hdl == NULL);