From 1e7d9fb49df99b5ca847c257745e889941d7d2d3 Mon Sep 17 00:00:00 2001 From: mav Date: Tue, 18 Feb 2014 14:53:36 +0000 Subject: [PATCH] MFC r259168: Don't even try to read vdev labels from devices smaller then SPA_MINDEVSIZE (64MB). Even if we would find one somehow, ZFS kernel code rejects such devices. It is funny to look on attempts to read 4 256K vdev labels from 1.44MB floppy, though it is not very practical and quite slow. git-svn-id: svn://svn.freebsd.org/base/stable/9@262165 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f --- .../opensolaris/lib/libzfs/common/libzfs_import.c | 11 +++++++++-- .../contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c | 10 ++++++++-- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c index fa3d6090d..f683adb13 100644 --- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c +++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c @@ -995,10 +995,10 @@ nozpool_all_slices(avl_tree_t *r, const char *sname) #endif /* sun */ } +#ifdef sun static void check_slices(avl_tree_t *r, int fd, const char *sname) { -#ifdef sun struct extvtoc vtoc; struct dk_gpt *gpt; char diskname[MAXNAMELEN]; @@ -1028,8 +1028,8 @@ check_slices(avl_tree_t *r, int fd, const char *sname) check_one_slice(r, diskname, i, 0, 1); efi_free(gpt); } -#endif /* sun */ } +#endif /* sun */ static void zpool_open_func(void *arg) @@ -1059,6 +1059,7 @@ zpool_open_func(void *arg) return; } /* this file is too small to hold a zpool */ +#ifdef sun if (S_ISREG(statbuf.st_mode) && statbuf.st_size < SPA_MINDEVSIZE) { (void) close(fd); @@ -1070,6 +1071,12 @@ zpool_open_func(void *arg) */ check_slices(rn->rn_avl, fd, rn->rn_name); } +#else /* !sun */ + if (statbuf.st_size < SPA_MINDEVSIZE) { + (void) close(fd); + return; + } +#endif /* sun */ if ((zpool_read_label(fd, &config)) != 0) { (void) close(fd); diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c index 34eeca235..5955db38b 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c @@ -370,10 +370,16 @@ vdev_geom_attach_taster(struct g_consumer *cp, struct g_provider *pp) if (pp->flags & G_PF_WITHER) return (EINVAL); - if (pp->sectorsize > VDEV_PAD_SIZE || !ISP2(pp->sectorsize)) - return (EINVAL); g_attach(cp, pp); error = g_access(cp, 1, 0, 0); + if (error == 0) { + if (pp->sectorsize > VDEV_PAD_SIZE || !ISP2(pp->sectorsize)) + error = EINVAL; + else if (pp->mediasize < SPA_MINDEVSIZE) + error = EINVAL; + if (error != 0) + g_access(cp, -1, 0, 0); + } if (error != 0) g_detach(cp); return (error); -- 2.45.0