Re: [PATCH] kvm tools: Allow the user to pass a FD to use as a TAP device

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On Wed, Dec 07, 2011 at 06:28:12PM +0200, Pekka Enberg wrote:
> On Wed, Dec 7, 2011 at 11:37 AM, Sasha Levin <levinsasha928@xxxxxxxxx> wrote:
> > This allows users to pass a pre-configured fd to use for the network
> > interface.
> >
> > For example:
> >        kvm run -n mode=tap,fd=3 3<>/dev/net/tap3
> >
> > Cc: Daniel P. Berrange <berrange@xxxxxxxxxx>
> > Cc: Osier Yang <jyang@xxxxxxxxxx>
> > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
> 
> Daniel, Osier, I assume this is useful for libvirt?

Yes, this works.

I don't know if kvmtool supports  the VNET_HDR extension yet, but if it
does, then we can make libvirt pass in a pre-opened FD for that too.


Daniel
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