@@ -1492,6 +1492,24 @@ void drop_collected_mounts(struct vfsmount *mnt)
release_mounts(&umount_list);
}
+struct vfsmount *clone_private_mount(struct path *path)
+{
+ struct vfsmount *old_mnt = path->mnt;
+ struct vfsmount *new_mnt;
+
+ if (IS_MNT_UNBINDABLE(old_mnt))
+ return ERR_PTR(-EINVAL);
+
+ down_read(&namespace_sem);
+ new_mnt = clone_mnt(old_mnt, path->dentry, CL_PRIVATE);
+ up_read(&namespace_sem);
+ if (!new_mnt)
+ return ERR_PTR(-ENOMEM);
+
+ return new_mnt;
+}
+EXPORT_SYMBOL_GPL(clone_private_mount);
+
int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
struct vfsmount *root)
{
@@ -103,6 +103,9 @@ extern int __mnt_is_readonly(struct vfsmount *mnt);
extern struct vfsmount *do_kern_mount(const char *fstype, int flags,
const char *name, void *data);
+struct path;
+extern struct vfsmount *clone_private_mount(struct path *path);
+
struct file_system_type;
extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
int flags, const char *name,