Re: [patch] kernel sysfs events layer

Tim Hockin
2004-09-15T21:40:00Z

On Wed, Sep 15, 2004 at 05:26:29PM -0400, Robert Love wrote:
> On Wed, 2004-09-15 at 14:23 -0700, Greg KH wrote:
>
> > We aren't giving absolute /dev entries here, that's the beauty of the
> > kobject tree :)
>
> Not that I agree, but I don't think it is the absolute /dev entries that
> bother him: it is the fact that knowledge of the mount itself is an
> information leak.
>
> Which it is. As root, in my name space, I should rest in the knowledge
> that my mounts are secret, I guess. But I just do not see it as a big
> problem.

It's a can of worms, is what it is. And I'm not sure what a good fix
would be. Would it just be enough to send a generic "mount-table changed"
event, and let userspace figure out the rest?

Or really, why is the kernel broadcasting a mount, which originated in
userland. Couldn't mount (or a mount wrapper) do that? It's already
running in the right namespace...