Re: [Qemu-devel] [PATCH 0/3] Allow host_net_add monitor command accept file descriptors

[Mark McLoughlin]

On Tue, 2009-07-07 at 11:06 +0100, Daniel P. Berrange wrote:
> On Tue, Jul 07, 2009 at 12:03:18PM +0300, Avi Kivity wrote:
> > On 07/07/2009 11:13 AM, Mark McLoughlin wrote:
> > >>>
> > >>>Nice idea, certainly.
> > >>>
> > >>>However, since it's only currently useful for tap/socket networking, I'm
> > >>>happier with not adding two new monitor commands and only supporting a
> > >>>single fd for now.
> > >>>
> > >>>       
> > >>What happens when we do get more commands?
> > >>     
> > >
> > >Any specific ideas around what else might use it?
> > >   
> > 
> > Migration, usb, passing around eventfds for interguest communication.
> 
> I must say the idea of being able to pass a FD for migration would be
> very nice. We currently have to open a localhost TCP port and tell QEMU
> to connect to is, which is less than desirable for security since we 
> cannot guarentee the process we want is the one actually connecting.

Okay, I'm sold - following up with a version with getfd/closefd.

Cheers,
Mark.