netdev - Re: [PATCH RFC] tun: export underlying socket

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Message-ID: <4AAE1026.4090702@voltaire.com>
Date:	Mon, 14 Sep 2009 12:43:02 +0300
From:	Or Gerlitz <ogerlitz@...taire.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au
Subject: Re: [PATCH RFC] tun: export underlying socket

Michael S. Tsirkin wrote:
> That's already possible. However virtualization users are familiar with configuring the tun device, and tun has grown virtualization-specific extensions, so I don't see a reason not to accomodate these uses
Today packets are written/read from/to Qemu to/from tun device, how 
would the use case with vhost will look like?

Is this the user setting an uplink NIC + bridge + per VM tun device but 
the packets will go from/to virtio-net in the guest kernel to/from vhost 
in the host kernel and then from/to vhost to/from tun? so eventually no 
packets will be seen by the qemu process? I don't see what these scheme 
buys people, I got very much confused.

Or.

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