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Refuse attemps to mount root filesystem

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This commit is contained in:
Poul-Henning Kamp 2004-11-09 22:14:57 +00:00
parent 16c2bf8bfb
commit b0aed5267e
4 changed files with 6 additions and 2 deletions
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2
sys/fs/devfs/devfs_vfsops.c
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@ -68,7 +68,7 @@ devfs_mount(struct mount *mp, struct thread *td)
error = 0; error = 0;
if (mp->mnt_flag & (MNT_UPDATE | MNT_NODEV)) if (mp->mnt_flag & (MNT_UPDATE | MNT_NODEV | MNT_ROOTFS))
return (EOPNOTSUPP); return (EOPNOTSUPP);
MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount), MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount),

2
sys/fs/fdescfs/fdesc_vfsops.c
View File

@ -71,7 +71,7 @@ fdesc_mount(struct mount *mp, struct thread *td)
/* /*
* Update is a no-op * Update is a no-op
*/ */
if (mp->mnt_flag & MNT_UPDATE) if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
return (EOPNOTSUPP); return (EOPNOTSUPP);
error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp, td); error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp, td);

2
sys/fs/hpfs/hpfs_vfsops.c
View File

@ -225,6 +225,8 @@ hpfs_mountfs(devvp, mp, argsp, td)
struct g_consumer *cp; struct g_consumer *cp;
struct bufobj *bo; struct bufobj *bo;
if (mp->mnt_flag & MNT_ROOTFS)
return (EOPNOTSUPP);
dprintf(("hpfs_mountfs():\n")); dprintf(("hpfs_mountfs():\n"));
ronly = (mp->mnt_flag & MNT_RDONLY) != 0; ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);

2
sys/fs/msdosfs/msdosfs_vfsops.c
View File

@ -364,6 +364,8 @@ mountmsdosfs(devvp, mp, td, argp)
struct g_consumer *cp; struct g_consumer *cp;
struct bufobj *bo; struct bufobj *bo;
if (mp->mnt_flag & MNT_ROOTFS)
return (EOPNOTSUPP);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0; ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
/* XXX: use VOP_ACCESS to check FS perms */ /* XXX: use VOP_ACCESS to check FS perms */
DROP_GIANT(); DROP_GIANT();