Re: [libvirt] [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change

[Anthony Liguori]

On 04/04/2011 08:16 AM, Daniel P. Berrange wrote:
> That doesn't really have any impact. If a desktop user is logged
> in, udev may change the ownership to match that user, but if they
> aren't, then udev may reset it to root:disk. Either way, QEMU
> may loose permissions to the disk.

Then if you create a guest without being in the 'disk' group, it'll 
fail.  That's pretty expected AFAICT.

But with libvirt today, when you launch a guest, your security context 
doesn't matter and there's no way you can control what context the guest 
gets.  libvirt is essentially creating it's own authorization 
mechanism.  Supporting ACLs goes much further down that path.

> > How much of a leap would it be to spawn a guest with the credentials
> > of the user that created/defined it?  Or better yet, to let the user
> > be specified in the XML.
> That's a completely independent RFE which won't fix this issue in
> the general case.

I think it really does.

Regards,

Anthony Liguori

> Regards,
> Daniel