diff options
| -rw-r--r-- | sys/fs/ntfs/ntfs_vfsops.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/sys/fs/ntfs/ntfs_vfsops.c b/sys/fs/ntfs/ntfs_vfsops.c index 26ab396..9d1f485 100644 --- a/sys/fs/ntfs/ntfs_vfsops.c +++ b/sys/fs/ntfs/ntfs_vfsops.c @@ -261,12 +261,26 @@ ntfs_mountfs(devvp, mp, td) int error, ronly, i, v; struct vnode *vp; struct g_consumer *cp; + struct g_provider *pp; char *cs_ntfs, *cs_local; ronly = (mp->mnt_flag & MNT_RDONLY) != 0; DROP_GIANT(); g_topology_lock(); - error = g_vfs_open(devvp, &cp, "ntfs", ronly ? 0 : 1); + + /* + * XXX: Do not allow more than one consumer to open a device + * associated with a particular GEOM provider. + * This disables multiple read-only mounts of a device, + * but it gets rid of panics in vget() when you try to + * mount the same device more than once. + */ + pp = g_dev_getprovider(devvp->v_rdev); + if ((pp != NULL) && ((pp->acr | pp->acw | pp->ace ) != 0)) + error = EPERM; + else + error = g_vfs_open(devvp, &cp, "ntfs", ronly ? 0 : 1); + g_topology_unlock(); PICKUP_GIANT(); VOP_UNLOCK(devvp, 0, td); |
