Re: The disappearing sys_call_table export.

[Christoph Hellwig]

On Fri, May 09, 2003 at 08:41:13AM -0400, Chuck Ebbert wrote:
> Christoph Hellwig wrote:
> 
> > You can have multiple mountspoints with the same path, only
> > the topmost one will be seen by userland.
> 
>   What keeps users from opening files before the upper layer
> filesystems get mounted?

Nothing.  Why would we want to do such silly things?

> And how do you handle user-mountable
> media like CD-ROMS?

look at supermount for a stackable filesystem that does nothing but
dealing with such media :)  It also shows how the underlying fs
can be mounted without ever exposing it to userspace..